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 <net/netns/generic.h> 168 #include <asm/byteorder.h> 169 #include <linux/rcupdate.h> 170 #include <linux/bitops.h> 171 #include <linux/io.h> 172 #include <linux/timex.h> 173 #include <linux/uaccess.h> 174 #include <asm/dma.h> 175 #include <asm/div64.h> /* do_div */ 176 177 #define VERSION "2.74" 178 #define IP_NAME_SZ 32 179 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 180 #define MPLS_STACK_BOTTOM htonl(0x00000100) 181 182 #define func_enter() pr_debug("entering %s\n", __func__); 183 184 /* Device flag bits */ 185 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 186 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 187 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 188 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 189 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 190 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 191 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 192 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 193 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 194 #define F_VID_RND (1<<9) /* Random VLAN ID */ 195 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 196 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 197 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 198 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 199 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 200 #define F_NODE (1<<15) /* Node memory alloc*/ 201 202 /* Thread control flag bits */ 203 #define T_STOP (1<<0) /* Stop run */ 204 #define T_RUN (1<<1) /* Start run */ 205 #define T_REMDEVALL (1<<2) /* Remove all devs */ 206 #define T_REMDEV (1<<3) /* Remove one dev */ 207 208 /* If lock -- can be removed after some work */ 209 #define if_lock(t) spin_lock(&(t->if_lock)); 210 #define if_unlock(t) spin_unlock(&(t->if_lock)); 211 212 /* Used to help with determining the pkts on receive */ 213 #define PKTGEN_MAGIC 0xbe9be955 214 #define PG_PROC_DIR "pktgen" 215 #define PGCTRL "pgctrl" 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 }; 399 400 401 static int pg_net_id __read_mostly; 402 403 struct pktgen_net { 404 struct net *net; 405 struct proc_dir_entry *proc_dir; 406 struct list_head pktgen_threads; 407 bool pktgen_exiting; 408 }; 409 410 struct pktgen_thread { 411 spinlock_t if_lock; /* for list of devices */ 412 struct list_head if_list; /* All device here */ 413 struct list_head th_list; 414 struct task_struct *tsk; 415 char result[512]; 416 417 /* Field for thread to receive "posted" events terminate, 418 stop ifs etc. */ 419 420 u32 control; 421 int cpu; 422 423 wait_queue_head_t queue; 424 struct completion start_done; 425 struct pktgen_net *net; 426 }; 427 428 #define REMOVE 1 429 #define FIND 0 430 431 static const char version[] = 432 "Packet Generator for packet performance testing. " 433 "Version: " VERSION "\n"; 434 435 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 436 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 437 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 438 const char *ifname, bool exact); 439 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 440 static void pktgen_run_all_threads(struct pktgen_net *pn); 441 static void pktgen_reset_all_threads(struct pktgen_net *pn); 442 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); 443 444 static void pktgen_stop(struct pktgen_thread *t); 445 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 446 447 /* Module parameters, defaults. */ 448 static int pg_count_d __read_mostly = 1000; 449 static int pg_delay_d __read_mostly; 450 static int pg_clone_skb_d __read_mostly; 451 static int debug __read_mostly; 452 453 static DEFINE_MUTEX(pktgen_thread_lock); 454 455 static struct notifier_block pktgen_notifier_block = { 456 .notifier_call = pktgen_device_event, 457 }; 458 459 /* 460 * /proc handling functions 461 * 462 */ 463 464 static int pgctrl_show(struct seq_file *seq, void *v) 465 { 466 seq_puts(seq, version); 467 return 0; 468 } 469 470 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 471 size_t count, loff_t *ppos) 472 { 473 int err = 0; 474 char data[128]; 475 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 476 477 if (!capable(CAP_NET_ADMIN)) { 478 err = -EPERM; 479 goto out; 480 } 481 482 if (count > sizeof(data)) 483 count = sizeof(data); 484 485 if (copy_from_user(data, buf, count)) { 486 err = -EFAULT; 487 goto out; 488 } 489 data[count - 1] = 0; /* Make string */ 490 491 if (!strcmp(data, "stop")) 492 pktgen_stop_all_threads_ifs(pn); 493 494 else if (!strcmp(data, "start")) 495 pktgen_run_all_threads(pn); 496 497 else if (!strcmp(data, "reset")) 498 pktgen_reset_all_threads(pn); 499 500 else 501 pr_warning("Unknown command: %s\n", data); 502 503 err = count; 504 505 out: 506 return err; 507 } 508 509 static int pgctrl_open(struct inode *inode, struct file *file) 510 { 511 return single_open(file, pgctrl_show, PDE_DATA(inode)); 512 } 513 514 static const struct file_operations pktgen_fops = { 515 .owner = THIS_MODULE, 516 .open = pgctrl_open, 517 .read = seq_read, 518 .llseek = seq_lseek, 519 .write = pgctrl_write, 520 .release = single_release, 521 }; 522 523 static int pktgen_if_show(struct seq_file *seq, void *v) 524 { 525 const struct pktgen_dev *pkt_dev = seq->private; 526 ktime_t stopped; 527 u64 idle; 528 529 seq_printf(seq, 530 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 531 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 532 pkt_dev->max_pkt_size); 533 534 seq_printf(seq, 535 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 536 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 537 pkt_dev->clone_skb, pkt_dev->odevname); 538 539 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 540 pkt_dev->lflow); 541 542 seq_printf(seq, 543 " queue_map_min: %u queue_map_max: %u\n", 544 pkt_dev->queue_map_min, 545 pkt_dev->queue_map_max); 546 547 if (pkt_dev->skb_priority) 548 seq_printf(seq, " skb_priority: %u\n", 549 pkt_dev->skb_priority); 550 551 if (pkt_dev->flags & F_IPV6) { 552 seq_printf(seq, 553 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 554 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 555 &pkt_dev->in6_saddr, 556 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 557 &pkt_dev->in6_daddr, 558 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 559 } else { 560 seq_printf(seq, 561 " dst_min: %s dst_max: %s\n", 562 pkt_dev->dst_min, pkt_dev->dst_max); 563 seq_printf(seq, 564 " src_min: %s src_max: %s\n", 565 pkt_dev->src_min, pkt_dev->src_max); 566 } 567 568 seq_puts(seq, " src_mac: "); 569 570 seq_printf(seq, "%pM ", 571 is_zero_ether_addr(pkt_dev->src_mac) ? 572 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 573 574 seq_printf(seq, "dst_mac: "); 575 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 576 577 seq_printf(seq, 578 " udp_src_min: %d udp_src_max: %d" 579 " udp_dst_min: %d udp_dst_max: %d\n", 580 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 581 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 582 583 seq_printf(seq, 584 " src_mac_count: %d dst_mac_count: %d\n", 585 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 586 587 if (pkt_dev->nr_labels) { 588 unsigned int i; 589 seq_printf(seq, " mpls: "); 590 for (i = 0; i < pkt_dev->nr_labels; i++) 591 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 592 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 593 } 594 595 if (pkt_dev->vlan_id != 0xffff) 596 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 597 pkt_dev->vlan_id, pkt_dev->vlan_p, 598 pkt_dev->vlan_cfi); 599 600 if (pkt_dev->svlan_id != 0xffff) 601 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 602 pkt_dev->svlan_id, pkt_dev->svlan_p, 603 pkt_dev->svlan_cfi); 604 605 if (pkt_dev->tos) 606 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 607 608 if (pkt_dev->traffic_class) 609 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 610 611 if (pkt_dev->node >= 0) 612 seq_printf(seq, " node: %d\n", pkt_dev->node); 613 614 seq_printf(seq, " Flags: "); 615 616 if (pkt_dev->flags & F_IPV6) 617 seq_printf(seq, "IPV6 "); 618 619 if (pkt_dev->flags & F_IPSRC_RND) 620 seq_printf(seq, "IPSRC_RND "); 621 622 if (pkt_dev->flags & F_IPDST_RND) 623 seq_printf(seq, "IPDST_RND "); 624 625 if (pkt_dev->flags & F_TXSIZE_RND) 626 seq_printf(seq, "TXSIZE_RND "); 627 628 if (pkt_dev->flags & F_UDPSRC_RND) 629 seq_printf(seq, "UDPSRC_RND "); 630 631 if (pkt_dev->flags & F_UDPDST_RND) 632 seq_printf(seq, "UDPDST_RND "); 633 634 if (pkt_dev->flags & F_MPLS_RND) 635 seq_printf(seq, "MPLS_RND "); 636 637 if (pkt_dev->flags & F_QUEUE_MAP_RND) 638 seq_printf(seq, "QUEUE_MAP_RND "); 639 640 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 641 seq_printf(seq, "QUEUE_MAP_CPU "); 642 643 if (pkt_dev->cflows) { 644 if (pkt_dev->flags & F_FLOW_SEQ) 645 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 646 else 647 seq_printf(seq, "FLOW_RND "); 648 } 649 650 #ifdef CONFIG_XFRM 651 if (pkt_dev->flags & F_IPSEC_ON) 652 seq_printf(seq, "IPSEC "); 653 #endif 654 655 if (pkt_dev->flags & F_MACSRC_RND) 656 seq_printf(seq, "MACSRC_RND "); 657 658 if (pkt_dev->flags & F_MACDST_RND) 659 seq_printf(seq, "MACDST_RND "); 660 661 if (pkt_dev->flags & F_VID_RND) 662 seq_printf(seq, "VID_RND "); 663 664 if (pkt_dev->flags & F_SVID_RND) 665 seq_printf(seq, "SVID_RND "); 666 667 if (pkt_dev->flags & F_NODE) 668 seq_printf(seq, "NODE_ALLOC "); 669 670 seq_puts(seq, "\n"); 671 672 /* not really stopped, more like last-running-at */ 673 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 674 idle = pkt_dev->idle_acc; 675 do_div(idle, NSEC_PER_USEC); 676 677 seq_printf(seq, 678 "Current:\n pkts-sofar: %llu errors: %llu\n", 679 (unsigned long long)pkt_dev->sofar, 680 (unsigned long long)pkt_dev->errors); 681 682 seq_printf(seq, 683 " started: %lluus stopped: %lluus idle: %lluus\n", 684 (unsigned long long) ktime_to_us(pkt_dev->started_at), 685 (unsigned long long) ktime_to_us(stopped), 686 (unsigned long long) idle); 687 688 seq_printf(seq, 689 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 690 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 691 pkt_dev->cur_src_mac_offset); 692 693 if (pkt_dev->flags & F_IPV6) { 694 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 695 &pkt_dev->cur_in6_saddr, 696 &pkt_dev->cur_in6_daddr); 697 } else 698 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 699 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 700 701 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 702 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 703 704 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 705 706 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 707 708 if (pkt_dev->result[0]) 709 seq_printf(seq, "Result: %s\n", pkt_dev->result); 710 else 711 seq_printf(seq, "Result: Idle\n"); 712 713 return 0; 714 } 715 716 717 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 718 __u32 *num) 719 { 720 int i = 0; 721 *num = 0; 722 723 for (; i < maxlen; i++) { 724 int value; 725 char c; 726 *num <<= 4; 727 if (get_user(c, &user_buffer[i])) 728 return -EFAULT; 729 value = hex_to_bin(c); 730 if (value >= 0) 731 *num |= value; 732 else 733 break; 734 } 735 return i; 736 } 737 738 static int count_trail_chars(const char __user * user_buffer, 739 unsigned int maxlen) 740 { 741 int i; 742 743 for (i = 0; i < maxlen; i++) { 744 char c; 745 if (get_user(c, &user_buffer[i])) 746 return -EFAULT; 747 switch (c) { 748 case '\"': 749 case '\n': 750 case '\r': 751 case '\t': 752 case ' ': 753 case '=': 754 break; 755 default: 756 goto done; 757 } 758 } 759 done: 760 return i; 761 } 762 763 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 764 unsigned long *num) 765 { 766 int i; 767 *num = 0; 768 769 for (i = 0; i < maxlen; i++) { 770 char c; 771 if (get_user(c, &user_buffer[i])) 772 return -EFAULT; 773 if ((c >= '0') && (c <= '9')) { 774 *num *= 10; 775 *num += c - '0'; 776 } else 777 break; 778 } 779 return i; 780 } 781 782 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 783 { 784 int i; 785 786 for (i = 0; i < maxlen; i++) { 787 char c; 788 if (get_user(c, &user_buffer[i])) 789 return -EFAULT; 790 switch (c) { 791 case '\"': 792 case '\n': 793 case '\r': 794 case '\t': 795 case ' ': 796 goto done_str; 797 break; 798 default: 799 break; 800 } 801 } 802 done_str: 803 return i; 804 } 805 806 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 807 { 808 unsigned int n = 0; 809 char c; 810 ssize_t i = 0; 811 int len; 812 813 pkt_dev->nr_labels = 0; 814 do { 815 __u32 tmp; 816 len = hex32_arg(&buffer[i], 8, &tmp); 817 if (len <= 0) 818 return len; 819 pkt_dev->labels[n] = htonl(tmp); 820 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 821 pkt_dev->flags |= F_MPLS_RND; 822 i += len; 823 if (get_user(c, &buffer[i])) 824 return -EFAULT; 825 i++; 826 n++; 827 if (n >= MAX_MPLS_LABELS) 828 return -E2BIG; 829 } while (c == ','); 830 831 pkt_dev->nr_labels = n; 832 return i; 833 } 834 835 static ssize_t pktgen_if_write(struct file *file, 836 const char __user * user_buffer, size_t count, 837 loff_t * offset) 838 { 839 struct seq_file *seq = file->private_data; 840 struct pktgen_dev *pkt_dev = seq->private; 841 int i, max, len; 842 char name[16], valstr[32]; 843 unsigned long value = 0; 844 char *pg_result = NULL; 845 int tmp = 0; 846 char buf[128]; 847 848 pg_result = &(pkt_dev->result[0]); 849 850 if (count < 1) { 851 pr_warning("wrong command format\n"); 852 return -EINVAL; 853 } 854 855 max = count; 856 tmp = count_trail_chars(user_buffer, max); 857 if (tmp < 0) { 858 pr_warning("illegal format\n"); 859 return tmp; 860 } 861 i = tmp; 862 863 /* Read variable name */ 864 865 len = strn_len(&user_buffer[i], sizeof(name) - 1); 866 if (len < 0) 867 return len; 868 869 memset(name, 0, sizeof(name)); 870 if (copy_from_user(name, &user_buffer[i], len)) 871 return -EFAULT; 872 i += len; 873 874 max = count - i; 875 len = count_trail_chars(&user_buffer[i], max); 876 if (len < 0) 877 return len; 878 879 i += len; 880 881 if (debug) { 882 size_t copy = min_t(size_t, count, 1023); 883 char tb[copy + 1]; 884 if (copy_from_user(tb, user_buffer, copy)) 885 return -EFAULT; 886 tb[copy] = 0; 887 pr_debug("%s,%lu buffer -:%s:-\n", 888 name, (unsigned long)count, tb); 889 } 890 891 if (!strcmp(name, "min_pkt_size")) { 892 len = num_arg(&user_buffer[i], 10, &value); 893 if (len < 0) 894 return len; 895 896 i += len; 897 if (value < 14 + 20 + 8) 898 value = 14 + 20 + 8; 899 if (value != pkt_dev->min_pkt_size) { 900 pkt_dev->min_pkt_size = value; 901 pkt_dev->cur_pkt_size = value; 902 } 903 sprintf(pg_result, "OK: min_pkt_size=%u", 904 pkt_dev->min_pkt_size); 905 return count; 906 } 907 908 if (!strcmp(name, "max_pkt_size")) { 909 len = num_arg(&user_buffer[i], 10, &value); 910 if (len < 0) 911 return len; 912 913 i += len; 914 if (value < 14 + 20 + 8) 915 value = 14 + 20 + 8; 916 if (value != pkt_dev->max_pkt_size) { 917 pkt_dev->max_pkt_size = value; 918 pkt_dev->cur_pkt_size = value; 919 } 920 sprintf(pg_result, "OK: max_pkt_size=%u", 921 pkt_dev->max_pkt_size); 922 return count; 923 } 924 925 /* Shortcut for min = max */ 926 927 if (!strcmp(name, "pkt_size")) { 928 len = num_arg(&user_buffer[i], 10, &value); 929 if (len < 0) 930 return len; 931 932 i += len; 933 if (value < 14 + 20 + 8) 934 value = 14 + 20 + 8; 935 if (value != pkt_dev->min_pkt_size) { 936 pkt_dev->min_pkt_size = value; 937 pkt_dev->max_pkt_size = value; 938 pkt_dev->cur_pkt_size = value; 939 } 940 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 941 return count; 942 } 943 944 if (!strcmp(name, "debug")) { 945 len = num_arg(&user_buffer[i], 10, &value); 946 if (len < 0) 947 return len; 948 949 i += len; 950 debug = value; 951 sprintf(pg_result, "OK: debug=%u", debug); 952 return count; 953 } 954 955 if (!strcmp(name, "frags")) { 956 len = num_arg(&user_buffer[i], 10, &value); 957 if (len < 0) 958 return len; 959 960 i += len; 961 pkt_dev->nfrags = value; 962 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 963 return count; 964 } 965 if (!strcmp(name, "delay")) { 966 len = num_arg(&user_buffer[i], 10, &value); 967 if (len < 0) 968 return len; 969 970 i += len; 971 if (value == 0x7FFFFFFF) 972 pkt_dev->delay = ULLONG_MAX; 973 else 974 pkt_dev->delay = (u64)value; 975 976 sprintf(pg_result, "OK: delay=%llu", 977 (unsigned long long) pkt_dev->delay); 978 return count; 979 } 980 if (!strcmp(name, "rate")) { 981 len = num_arg(&user_buffer[i], 10, &value); 982 if (len < 0) 983 return len; 984 985 i += len; 986 if (!value) 987 return len; 988 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 989 if (debug) 990 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 991 992 sprintf(pg_result, "OK: rate=%lu", value); 993 return count; 994 } 995 if (!strcmp(name, "ratep")) { 996 len = num_arg(&user_buffer[i], 10, &value); 997 if (len < 0) 998 return len; 999 1000 i += len; 1001 if (!value) 1002 return len; 1003 pkt_dev->delay = NSEC_PER_SEC/value; 1004 if (debug) 1005 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1006 1007 sprintf(pg_result, "OK: rate=%lu", value); 1008 return count; 1009 } 1010 if (!strcmp(name, "udp_src_min")) { 1011 len = num_arg(&user_buffer[i], 10, &value); 1012 if (len < 0) 1013 return len; 1014 1015 i += len; 1016 if (value != pkt_dev->udp_src_min) { 1017 pkt_dev->udp_src_min = value; 1018 pkt_dev->cur_udp_src = value; 1019 } 1020 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1021 return count; 1022 } 1023 if (!strcmp(name, "udp_dst_min")) { 1024 len = num_arg(&user_buffer[i], 10, &value); 1025 if (len < 0) 1026 return len; 1027 1028 i += len; 1029 if (value != pkt_dev->udp_dst_min) { 1030 pkt_dev->udp_dst_min = value; 1031 pkt_dev->cur_udp_dst = value; 1032 } 1033 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1034 return count; 1035 } 1036 if (!strcmp(name, "udp_src_max")) { 1037 len = num_arg(&user_buffer[i], 10, &value); 1038 if (len < 0) 1039 return len; 1040 1041 i += len; 1042 if (value != pkt_dev->udp_src_max) { 1043 pkt_dev->udp_src_max = value; 1044 pkt_dev->cur_udp_src = value; 1045 } 1046 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1047 return count; 1048 } 1049 if (!strcmp(name, "udp_dst_max")) { 1050 len = num_arg(&user_buffer[i], 10, &value); 1051 if (len < 0) 1052 return len; 1053 1054 i += len; 1055 if (value != pkt_dev->udp_dst_max) { 1056 pkt_dev->udp_dst_max = value; 1057 pkt_dev->cur_udp_dst = value; 1058 } 1059 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1060 return count; 1061 } 1062 if (!strcmp(name, "clone_skb")) { 1063 len = num_arg(&user_buffer[i], 10, &value); 1064 if (len < 0) 1065 return len; 1066 if ((value > 0) && 1067 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1068 return -ENOTSUPP; 1069 i += len; 1070 pkt_dev->clone_skb = value; 1071 1072 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1073 return count; 1074 } 1075 if (!strcmp(name, "count")) { 1076 len = num_arg(&user_buffer[i], 10, &value); 1077 if (len < 0) 1078 return len; 1079 1080 i += len; 1081 pkt_dev->count = value; 1082 sprintf(pg_result, "OK: count=%llu", 1083 (unsigned long long)pkt_dev->count); 1084 return count; 1085 } 1086 if (!strcmp(name, "src_mac_count")) { 1087 len = num_arg(&user_buffer[i], 10, &value); 1088 if (len < 0) 1089 return len; 1090 1091 i += len; 1092 if (pkt_dev->src_mac_count != value) { 1093 pkt_dev->src_mac_count = value; 1094 pkt_dev->cur_src_mac_offset = 0; 1095 } 1096 sprintf(pg_result, "OK: src_mac_count=%d", 1097 pkt_dev->src_mac_count); 1098 return count; 1099 } 1100 if (!strcmp(name, "dst_mac_count")) { 1101 len = num_arg(&user_buffer[i], 10, &value); 1102 if (len < 0) 1103 return len; 1104 1105 i += len; 1106 if (pkt_dev->dst_mac_count != value) { 1107 pkt_dev->dst_mac_count = value; 1108 pkt_dev->cur_dst_mac_offset = 0; 1109 } 1110 sprintf(pg_result, "OK: dst_mac_count=%d", 1111 pkt_dev->dst_mac_count); 1112 return count; 1113 } 1114 if (!strcmp(name, "node")) { 1115 len = num_arg(&user_buffer[i], 10, &value); 1116 if (len < 0) 1117 return len; 1118 1119 i += len; 1120 1121 if (node_possible(value)) { 1122 pkt_dev->node = value; 1123 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1124 if (pkt_dev->page) { 1125 put_page(pkt_dev->page); 1126 pkt_dev->page = NULL; 1127 } 1128 } 1129 else 1130 sprintf(pg_result, "ERROR: node not possible"); 1131 return count; 1132 } 1133 if (!strcmp(name, "flag")) { 1134 char f[32]; 1135 memset(f, 0, 32); 1136 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1137 if (len < 0) 1138 return len; 1139 1140 if (copy_from_user(f, &user_buffer[i], len)) 1141 return -EFAULT; 1142 i += len; 1143 if (strcmp(f, "IPSRC_RND") == 0) 1144 pkt_dev->flags |= F_IPSRC_RND; 1145 1146 else if (strcmp(f, "!IPSRC_RND") == 0) 1147 pkt_dev->flags &= ~F_IPSRC_RND; 1148 1149 else if (strcmp(f, "TXSIZE_RND") == 0) 1150 pkt_dev->flags |= F_TXSIZE_RND; 1151 1152 else if (strcmp(f, "!TXSIZE_RND") == 0) 1153 pkt_dev->flags &= ~F_TXSIZE_RND; 1154 1155 else if (strcmp(f, "IPDST_RND") == 0) 1156 pkt_dev->flags |= F_IPDST_RND; 1157 1158 else if (strcmp(f, "!IPDST_RND") == 0) 1159 pkt_dev->flags &= ~F_IPDST_RND; 1160 1161 else if (strcmp(f, "UDPSRC_RND") == 0) 1162 pkt_dev->flags |= F_UDPSRC_RND; 1163 1164 else if (strcmp(f, "!UDPSRC_RND") == 0) 1165 pkt_dev->flags &= ~F_UDPSRC_RND; 1166 1167 else if (strcmp(f, "UDPDST_RND") == 0) 1168 pkt_dev->flags |= F_UDPDST_RND; 1169 1170 else if (strcmp(f, "!UDPDST_RND") == 0) 1171 pkt_dev->flags &= ~F_UDPDST_RND; 1172 1173 else if (strcmp(f, "MACSRC_RND") == 0) 1174 pkt_dev->flags |= F_MACSRC_RND; 1175 1176 else if (strcmp(f, "!MACSRC_RND") == 0) 1177 pkt_dev->flags &= ~F_MACSRC_RND; 1178 1179 else if (strcmp(f, "MACDST_RND") == 0) 1180 pkt_dev->flags |= F_MACDST_RND; 1181 1182 else if (strcmp(f, "!MACDST_RND") == 0) 1183 pkt_dev->flags &= ~F_MACDST_RND; 1184 1185 else if (strcmp(f, "MPLS_RND") == 0) 1186 pkt_dev->flags |= F_MPLS_RND; 1187 1188 else if (strcmp(f, "!MPLS_RND") == 0) 1189 pkt_dev->flags &= ~F_MPLS_RND; 1190 1191 else if (strcmp(f, "VID_RND") == 0) 1192 pkt_dev->flags |= F_VID_RND; 1193 1194 else if (strcmp(f, "!VID_RND") == 0) 1195 pkt_dev->flags &= ~F_VID_RND; 1196 1197 else if (strcmp(f, "SVID_RND") == 0) 1198 pkt_dev->flags |= F_SVID_RND; 1199 1200 else if (strcmp(f, "!SVID_RND") == 0) 1201 pkt_dev->flags &= ~F_SVID_RND; 1202 1203 else if (strcmp(f, "FLOW_SEQ") == 0) 1204 pkt_dev->flags |= F_FLOW_SEQ; 1205 1206 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1207 pkt_dev->flags |= F_QUEUE_MAP_RND; 1208 1209 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1210 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1211 1212 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1213 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1214 1215 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1216 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1217 #ifdef CONFIG_XFRM 1218 else if (strcmp(f, "IPSEC") == 0) 1219 pkt_dev->flags |= F_IPSEC_ON; 1220 #endif 1221 1222 else if (strcmp(f, "!IPV6") == 0) 1223 pkt_dev->flags &= ~F_IPV6; 1224 1225 else if (strcmp(f, "NODE_ALLOC") == 0) 1226 pkt_dev->flags |= F_NODE; 1227 1228 else if (strcmp(f, "!NODE_ALLOC") == 0) 1229 pkt_dev->flags &= ~F_NODE; 1230 1231 else { 1232 sprintf(pg_result, 1233 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1234 f, 1235 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1236 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1237 return count; 1238 } 1239 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1240 return count; 1241 } 1242 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1243 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1244 if (len < 0) 1245 return len; 1246 1247 if (copy_from_user(buf, &user_buffer[i], len)) 1248 return -EFAULT; 1249 buf[len] = 0; 1250 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1251 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1252 strncpy(pkt_dev->dst_min, buf, len); 1253 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1254 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1255 } 1256 if (debug) 1257 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1258 i += len; 1259 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1260 return count; 1261 } 1262 if (!strcmp(name, "dst_max")) { 1263 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1264 if (len < 0) 1265 return len; 1266 1267 1268 if (copy_from_user(buf, &user_buffer[i], len)) 1269 return -EFAULT; 1270 1271 buf[len] = 0; 1272 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1273 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1274 strncpy(pkt_dev->dst_max, buf, len); 1275 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1276 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1277 } 1278 if (debug) 1279 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1280 i += len; 1281 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1282 return count; 1283 } 1284 if (!strcmp(name, "dst6")) { 1285 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1286 if (len < 0) 1287 return len; 1288 1289 pkt_dev->flags |= F_IPV6; 1290 1291 if (copy_from_user(buf, &user_buffer[i], len)) 1292 return -EFAULT; 1293 buf[len] = 0; 1294 1295 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1296 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1297 1298 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1299 1300 if (debug) 1301 pr_debug("dst6 set to: %s\n", buf); 1302 1303 i += len; 1304 sprintf(pg_result, "OK: dst6=%s", buf); 1305 return count; 1306 } 1307 if (!strcmp(name, "dst6_min")) { 1308 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1309 if (len < 0) 1310 return len; 1311 1312 pkt_dev->flags |= F_IPV6; 1313 1314 if (copy_from_user(buf, &user_buffer[i], len)) 1315 return -EFAULT; 1316 buf[len] = 0; 1317 1318 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1319 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1320 1321 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1322 if (debug) 1323 pr_debug("dst6_min set to: %s\n", buf); 1324 1325 i += len; 1326 sprintf(pg_result, "OK: dst6_min=%s", buf); 1327 return count; 1328 } 1329 if (!strcmp(name, "dst6_max")) { 1330 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1331 if (len < 0) 1332 return len; 1333 1334 pkt_dev->flags |= F_IPV6; 1335 1336 if (copy_from_user(buf, &user_buffer[i], len)) 1337 return -EFAULT; 1338 buf[len] = 0; 1339 1340 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1341 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1342 1343 if (debug) 1344 pr_debug("dst6_max set to: %s\n", buf); 1345 1346 i += len; 1347 sprintf(pg_result, "OK: dst6_max=%s", buf); 1348 return count; 1349 } 1350 if (!strcmp(name, "src6")) { 1351 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1352 if (len < 0) 1353 return len; 1354 1355 pkt_dev->flags |= F_IPV6; 1356 1357 if (copy_from_user(buf, &user_buffer[i], len)) 1358 return -EFAULT; 1359 buf[len] = 0; 1360 1361 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1362 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1363 1364 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1365 1366 if (debug) 1367 pr_debug("src6 set to: %s\n", buf); 1368 1369 i += len; 1370 sprintf(pg_result, "OK: src6=%s", buf); 1371 return count; 1372 } 1373 if (!strcmp(name, "src_min")) { 1374 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1375 if (len < 0) 1376 return len; 1377 1378 if (copy_from_user(buf, &user_buffer[i], len)) 1379 return -EFAULT; 1380 buf[len] = 0; 1381 if (strcmp(buf, pkt_dev->src_min) != 0) { 1382 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1383 strncpy(pkt_dev->src_min, buf, len); 1384 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1385 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1386 } 1387 if (debug) 1388 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1389 i += len; 1390 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1391 return count; 1392 } 1393 if (!strcmp(name, "src_max")) { 1394 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1395 if (len < 0) 1396 return len; 1397 1398 if (copy_from_user(buf, &user_buffer[i], len)) 1399 return -EFAULT; 1400 buf[len] = 0; 1401 if (strcmp(buf, pkt_dev->src_max) != 0) { 1402 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1403 strncpy(pkt_dev->src_max, buf, len); 1404 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1405 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1406 } 1407 if (debug) 1408 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1409 i += len; 1410 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1411 return count; 1412 } 1413 if (!strcmp(name, "dst_mac")) { 1414 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1415 if (len < 0) 1416 return len; 1417 1418 memset(valstr, 0, sizeof(valstr)); 1419 if (copy_from_user(valstr, &user_buffer[i], len)) 1420 return -EFAULT; 1421 1422 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1423 return -EINVAL; 1424 /* Set up Dest MAC */ 1425 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1426 1427 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1428 return count; 1429 } 1430 if (!strcmp(name, "src_mac")) { 1431 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1432 if (len < 0) 1433 return len; 1434 1435 memset(valstr, 0, sizeof(valstr)); 1436 if (copy_from_user(valstr, &user_buffer[i], len)) 1437 return -EFAULT; 1438 1439 if (!mac_pton(valstr, pkt_dev->src_mac)) 1440 return -EINVAL; 1441 /* Set up Src MAC */ 1442 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1443 1444 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1445 return count; 1446 } 1447 1448 if (!strcmp(name, "clear_counters")) { 1449 pktgen_clear_counters(pkt_dev); 1450 sprintf(pg_result, "OK: Clearing counters.\n"); 1451 return count; 1452 } 1453 1454 if (!strcmp(name, "flows")) { 1455 len = num_arg(&user_buffer[i], 10, &value); 1456 if (len < 0) 1457 return len; 1458 1459 i += len; 1460 if (value > MAX_CFLOWS) 1461 value = MAX_CFLOWS; 1462 1463 pkt_dev->cflows = value; 1464 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1465 return count; 1466 } 1467 1468 if (!strcmp(name, "flowlen")) { 1469 len = num_arg(&user_buffer[i], 10, &value); 1470 if (len < 0) 1471 return len; 1472 1473 i += len; 1474 pkt_dev->lflow = value; 1475 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1476 return count; 1477 } 1478 1479 if (!strcmp(name, "queue_map_min")) { 1480 len = num_arg(&user_buffer[i], 5, &value); 1481 if (len < 0) 1482 return len; 1483 1484 i += len; 1485 pkt_dev->queue_map_min = value; 1486 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1487 return count; 1488 } 1489 1490 if (!strcmp(name, "queue_map_max")) { 1491 len = num_arg(&user_buffer[i], 5, &value); 1492 if (len < 0) 1493 return len; 1494 1495 i += len; 1496 pkt_dev->queue_map_max = value; 1497 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1498 return count; 1499 } 1500 1501 if (!strcmp(name, "mpls")) { 1502 unsigned int n, cnt; 1503 1504 len = get_labels(&user_buffer[i], pkt_dev); 1505 if (len < 0) 1506 return len; 1507 i += len; 1508 cnt = sprintf(pg_result, "OK: mpls="); 1509 for (n = 0; n < pkt_dev->nr_labels; n++) 1510 cnt += sprintf(pg_result + cnt, 1511 "%08x%s", ntohl(pkt_dev->labels[n]), 1512 n == pkt_dev->nr_labels-1 ? "" : ","); 1513 1514 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1515 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1516 pkt_dev->svlan_id = 0xffff; 1517 1518 if (debug) 1519 pr_debug("VLAN/SVLAN auto turned off\n"); 1520 } 1521 return count; 1522 } 1523 1524 if (!strcmp(name, "vlan_id")) { 1525 len = num_arg(&user_buffer[i], 4, &value); 1526 if (len < 0) 1527 return len; 1528 1529 i += len; 1530 if (value <= 4095) { 1531 pkt_dev->vlan_id = value; /* turn on VLAN */ 1532 1533 if (debug) 1534 pr_debug("VLAN turned on\n"); 1535 1536 if (debug && pkt_dev->nr_labels) 1537 pr_debug("MPLS auto turned off\n"); 1538 1539 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1540 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1541 } else { 1542 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1543 pkt_dev->svlan_id = 0xffff; 1544 1545 if (debug) 1546 pr_debug("VLAN/SVLAN turned off\n"); 1547 } 1548 return count; 1549 } 1550 1551 if (!strcmp(name, "vlan_p")) { 1552 len = num_arg(&user_buffer[i], 1, &value); 1553 if (len < 0) 1554 return len; 1555 1556 i += len; 1557 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1558 pkt_dev->vlan_p = value; 1559 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1560 } else { 1561 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1562 } 1563 return count; 1564 } 1565 1566 if (!strcmp(name, "vlan_cfi")) { 1567 len = num_arg(&user_buffer[i], 1, &value); 1568 if (len < 0) 1569 return len; 1570 1571 i += len; 1572 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1573 pkt_dev->vlan_cfi = value; 1574 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1575 } else { 1576 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1577 } 1578 return count; 1579 } 1580 1581 if (!strcmp(name, "svlan_id")) { 1582 len = num_arg(&user_buffer[i], 4, &value); 1583 if (len < 0) 1584 return len; 1585 1586 i += len; 1587 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1588 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1589 1590 if (debug) 1591 pr_debug("SVLAN turned on\n"); 1592 1593 if (debug && pkt_dev->nr_labels) 1594 pr_debug("MPLS auto turned off\n"); 1595 1596 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1597 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1598 } else { 1599 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1600 pkt_dev->svlan_id = 0xffff; 1601 1602 if (debug) 1603 pr_debug("VLAN/SVLAN turned off\n"); 1604 } 1605 return count; 1606 } 1607 1608 if (!strcmp(name, "svlan_p")) { 1609 len = num_arg(&user_buffer[i], 1, &value); 1610 if (len < 0) 1611 return len; 1612 1613 i += len; 1614 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1615 pkt_dev->svlan_p = value; 1616 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1617 } else { 1618 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1619 } 1620 return count; 1621 } 1622 1623 if (!strcmp(name, "svlan_cfi")) { 1624 len = num_arg(&user_buffer[i], 1, &value); 1625 if (len < 0) 1626 return len; 1627 1628 i += len; 1629 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1630 pkt_dev->svlan_cfi = value; 1631 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1632 } else { 1633 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1634 } 1635 return count; 1636 } 1637 1638 if (!strcmp(name, "tos")) { 1639 __u32 tmp_value = 0; 1640 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1641 if (len < 0) 1642 return len; 1643 1644 i += len; 1645 if (len == 2) { 1646 pkt_dev->tos = tmp_value; 1647 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1648 } else { 1649 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1650 } 1651 return count; 1652 } 1653 1654 if (!strcmp(name, "traffic_class")) { 1655 __u32 tmp_value = 0; 1656 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1657 if (len < 0) 1658 return len; 1659 1660 i += len; 1661 if (len == 2) { 1662 pkt_dev->traffic_class = tmp_value; 1663 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1664 } else { 1665 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1666 } 1667 return count; 1668 } 1669 1670 if (!strcmp(name, "skb_priority")) { 1671 len = num_arg(&user_buffer[i], 9, &value); 1672 if (len < 0) 1673 return len; 1674 1675 i += len; 1676 pkt_dev->skb_priority = value; 1677 sprintf(pg_result, "OK: skb_priority=%i", 1678 pkt_dev->skb_priority); 1679 return count; 1680 } 1681 1682 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1683 return -EINVAL; 1684 } 1685 1686 static int pktgen_if_open(struct inode *inode, struct file *file) 1687 { 1688 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1689 } 1690 1691 static const struct file_operations pktgen_if_fops = { 1692 .owner = THIS_MODULE, 1693 .open = pktgen_if_open, 1694 .read = seq_read, 1695 .llseek = seq_lseek, 1696 .write = pktgen_if_write, 1697 .release = single_release, 1698 }; 1699 1700 static int pktgen_thread_show(struct seq_file *seq, void *v) 1701 { 1702 struct pktgen_thread *t = seq->private; 1703 const struct pktgen_dev *pkt_dev; 1704 1705 BUG_ON(!t); 1706 1707 seq_printf(seq, "Running: "); 1708 1709 if_lock(t); 1710 list_for_each_entry(pkt_dev, &t->if_list, list) 1711 if (pkt_dev->running) 1712 seq_printf(seq, "%s ", pkt_dev->odevname); 1713 1714 seq_printf(seq, "\nStopped: "); 1715 1716 list_for_each_entry(pkt_dev, &t->if_list, list) 1717 if (!pkt_dev->running) 1718 seq_printf(seq, "%s ", pkt_dev->odevname); 1719 1720 if (t->result[0]) 1721 seq_printf(seq, "\nResult: %s\n", t->result); 1722 else 1723 seq_printf(seq, "\nResult: NA\n"); 1724 1725 if_unlock(t); 1726 1727 return 0; 1728 } 1729 1730 static ssize_t pktgen_thread_write(struct file *file, 1731 const char __user * user_buffer, 1732 size_t count, loff_t * offset) 1733 { 1734 struct seq_file *seq = file->private_data; 1735 struct pktgen_thread *t = seq->private; 1736 int i, max, len, ret; 1737 char name[40]; 1738 char *pg_result; 1739 1740 if (count < 1) { 1741 // sprintf(pg_result, "Wrong command format"); 1742 return -EINVAL; 1743 } 1744 1745 max = count; 1746 len = count_trail_chars(user_buffer, max); 1747 if (len < 0) 1748 return len; 1749 1750 i = len; 1751 1752 /* Read variable name */ 1753 1754 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1755 if (len < 0) 1756 return len; 1757 1758 memset(name, 0, sizeof(name)); 1759 if (copy_from_user(name, &user_buffer[i], len)) 1760 return -EFAULT; 1761 i += len; 1762 1763 max = count - i; 1764 len = count_trail_chars(&user_buffer[i], max); 1765 if (len < 0) 1766 return len; 1767 1768 i += len; 1769 1770 if (debug) 1771 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1772 1773 if (!t) { 1774 pr_err("ERROR: No thread\n"); 1775 ret = -EINVAL; 1776 goto out; 1777 } 1778 1779 pg_result = &(t->result[0]); 1780 1781 if (!strcmp(name, "add_device")) { 1782 char f[32]; 1783 memset(f, 0, 32); 1784 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1785 if (len < 0) { 1786 ret = len; 1787 goto out; 1788 } 1789 if (copy_from_user(f, &user_buffer[i], len)) 1790 return -EFAULT; 1791 i += len; 1792 mutex_lock(&pktgen_thread_lock); 1793 ret = pktgen_add_device(t, f); 1794 mutex_unlock(&pktgen_thread_lock); 1795 if (!ret) { 1796 ret = count; 1797 sprintf(pg_result, "OK: add_device=%s", f); 1798 } else 1799 sprintf(pg_result, "ERROR: can not add device %s", f); 1800 goto out; 1801 } 1802 1803 if (!strcmp(name, "rem_device_all")) { 1804 mutex_lock(&pktgen_thread_lock); 1805 t->control |= T_REMDEVALL; 1806 mutex_unlock(&pktgen_thread_lock); 1807 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1808 ret = count; 1809 sprintf(pg_result, "OK: rem_device_all"); 1810 goto out; 1811 } 1812 1813 if (!strcmp(name, "max_before_softirq")) { 1814 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1815 ret = count; 1816 goto out; 1817 } 1818 1819 ret = -EINVAL; 1820 out: 1821 return ret; 1822 } 1823 1824 static int pktgen_thread_open(struct inode *inode, struct file *file) 1825 { 1826 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1827 } 1828 1829 static const struct file_operations pktgen_thread_fops = { 1830 .owner = THIS_MODULE, 1831 .open = pktgen_thread_open, 1832 .read = seq_read, 1833 .llseek = seq_lseek, 1834 .write = pktgen_thread_write, 1835 .release = single_release, 1836 }; 1837 1838 /* Think find or remove for NN */ 1839 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1840 const char *ifname, int remove) 1841 { 1842 struct pktgen_thread *t; 1843 struct pktgen_dev *pkt_dev = NULL; 1844 bool exact = (remove == FIND); 1845 1846 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1847 pkt_dev = pktgen_find_dev(t, ifname, exact); 1848 if (pkt_dev) { 1849 if (remove) { 1850 if_lock(t); 1851 pkt_dev->removal_mark = 1; 1852 t->control |= T_REMDEV; 1853 if_unlock(t); 1854 } 1855 break; 1856 } 1857 } 1858 return pkt_dev; 1859 } 1860 1861 /* 1862 * mark a device for removal 1863 */ 1864 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1865 { 1866 struct pktgen_dev *pkt_dev = NULL; 1867 const int max_tries = 10, msec_per_try = 125; 1868 int i = 0; 1869 1870 mutex_lock(&pktgen_thread_lock); 1871 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1872 1873 while (1) { 1874 1875 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1876 if (pkt_dev == NULL) 1877 break; /* success */ 1878 1879 mutex_unlock(&pktgen_thread_lock); 1880 pr_debug("%s: waiting for %s to disappear....\n", 1881 __func__, ifname); 1882 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1883 mutex_lock(&pktgen_thread_lock); 1884 1885 if (++i >= max_tries) { 1886 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1887 __func__, msec_per_try * i, ifname); 1888 break; 1889 } 1890 1891 } 1892 1893 mutex_unlock(&pktgen_thread_lock); 1894 } 1895 1896 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 1897 { 1898 struct pktgen_thread *t; 1899 1900 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1901 struct pktgen_dev *pkt_dev; 1902 1903 list_for_each_entry(pkt_dev, &t->if_list, list) { 1904 if (pkt_dev->odev != dev) 1905 continue; 1906 1907 proc_remove(pkt_dev->entry); 1908 1909 pkt_dev->entry = proc_create_data(dev->name, 0600, 1910 pn->proc_dir, 1911 &pktgen_if_fops, 1912 pkt_dev); 1913 if (!pkt_dev->entry) 1914 pr_err("can't move proc entry for '%s'\n", 1915 dev->name); 1916 break; 1917 } 1918 } 1919 } 1920 1921 static int pktgen_device_event(struct notifier_block *unused, 1922 unsigned long event, void *ptr) 1923 { 1924 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1925 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 1926 1927 if (pn->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(pn, dev); 1937 break; 1938 1939 case NETDEV_UNREGISTER: 1940 pktgen_mark_device(pn, dev->name); 1941 break; 1942 } 1943 1944 return NOTIFY_DONE; 1945 } 1946 1947 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 1948 struct pktgen_dev *pkt_dev, 1949 const char *ifname) 1950 { 1951 char b[IFNAMSIZ+5]; 1952 int i; 1953 1954 for (i = 0; ifname[i] != '@'; i++) { 1955 if (i == IFNAMSIZ) 1956 break; 1957 1958 b[i] = ifname[i]; 1959 } 1960 b[i] = 0; 1961 1962 return dev_get_by_name(pn->net, b); 1963 } 1964 1965 1966 /* Associate pktgen_dev with a device. */ 1967 1968 static int pktgen_setup_dev(const struct pktgen_net *pn, 1969 struct pktgen_dev *pkt_dev, const char *ifname) 1970 { 1971 struct net_device *odev; 1972 int err; 1973 1974 /* Clean old setups */ 1975 if (pkt_dev->odev) { 1976 dev_put(pkt_dev->odev); 1977 pkt_dev->odev = NULL; 1978 } 1979 1980 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 1981 if (!odev) { 1982 pr_err("no such netdevice: \"%s\"\n", ifname); 1983 return -ENODEV; 1984 } 1985 1986 if (odev->type != ARPHRD_ETHER) { 1987 pr_err("not an ethernet device: \"%s\"\n", ifname); 1988 err = -EINVAL; 1989 } else if (!netif_running(odev)) { 1990 pr_err("device is down: \"%s\"\n", ifname); 1991 err = -ENETDOWN; 1992 } else { 1993 pkt_dev->odev = odev; 1994 return 0; 1995 } 1996 1997 dev_put(odev); 1998 return err; 1999 } 2000 2001 /* Read pkt_dev from the interface and set up internal pktgen_dev 2002 * structure to have the right information to create/send packets 2003 */ 2004 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2005 { 2006 int ntxq; 2007 2008 if (!pkt_dev->odev) { 2009 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2010 sprintf(pkt_dev->result, 2011 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2012 return; 2013 } 2014 2015 /* make sure that we don't pick a non-existing transmit queue */ 2016 ntxq = pkt_dev->odev->real_num_tx_queues; 2017 2018 if (ntxq <= pkt_dev->queue_map_min) { 2019 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2020 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2021 pkt_dev->odevname); 2022 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2023 } 2024 if (pkt_dev->queue_map_max >= ntxq) { 2025 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2026 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2027 pkt_dev->odevname); 2028 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2029 } 2030 2031 /* Default to the interface's mac if not explicitly set. */ 2032 2033 if (is_zero_ether_addr(pkt_dev->src_mac)) 2034 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2035 2036 /* Set up Dest MAC */ 2037 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2038 2039 if (pkt_dev->flags & F_IPV6) { 2040 int i, set = 0, err = 1; 2041 struct inet6_dev *idev; 2042 2043 if (pkt_dev->min_pkt_size == 0) { 2044 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2045 + sizeof(struct udphdr) 2046 + sizeof(struct pktgen_hdr) 2047 + pkt_dev->pkt_overhead; 2048 } 2049 2050 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2051 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2052 set = 1; 2053 break; 2054 } 2055 2056 if (!set) { 2057 2058 /* 2059 * Use linklevel address if unconfigured. 2060 * 2061 * use ipv6_get_lladdr if/when it's get exported 2062 */ 2063 2064 rcu_read_lock(); 2065 idev = __in6_dev_get(pkt_dev->odev); 2066 if (idev) { 2067 struct inet6_ifaddr *ifp; 2068 2069 read_lock_bh(&idev->lock); 2070 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2071 if ((ifp->scope & IFA_LINK) && 2072 !(ifp->flags & IFA_F_TENTATIVE)) { 2073 pkt_dev->cur_in6_saddr = ifp->addr; 2074 err = 0; 2075 break; 2076 } 2077 } 2078 read_unlock_bh(&idev->lock); 2079 } 2080 rcu_read_unlock(); 2081 if (err) 2082 pr_err("ERROR: IPv6 link address not available\n"); 2083 } 2084 } else { 2085 if (pkt_dev->min_pkt_size == 0) { 2086 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2087 + sizeof(struct udphdr) 2088 + sizeof(struct pktgen_hdr) 2089 + pkt_dev->pkt_overhead; 2090 } 2091 2092 pkt_dev->saddr_min = 0; 2093 pkt_dev->saddr_max = 0; 2094 if (strlen(pkt_dev->src_min) == 0) { 2095 2096 struct in_device *in_dev; 2097 2098 rcu_read_lock(); 2099 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2100 if (in_dev) { 2101 if (in_dev->ifa_list) { 2102 pkt_dev->saddr_min = 2103 in_dev->ifa_list->ifa_address; 2104 pkt_dev->saddr_max = pkt_dev->saddr_min; 2105 } 2106 } 2107 rcu_read_unlock(); 2108 } else { 2109 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2110 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2111 } 2112 2113 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2114 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2115 } 2116 /* Initialize current values. */ 2117 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2118 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2119 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2120 2121 pkt_dev->cur_dst_mac_offset = 0; 2122 pkt_dev->cur_src_mac_offset = 0; 2123 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2124 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2125 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2126 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2127 pkt_dev->nflows = 0; 2128 } 2129 2130 2131 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2132 { 2133 ktime_t start_time, end_time; 2134 s64 remaining; 2135 struct hrtimer_sleeper t; 2136 2137 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2138 hrtimer_set_expires(&t.timer, spin_until); 2139 2140 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2141 if (remaining <= 0) { 2142 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2143 return; 2144 } 2145 2146 start_time = ktime_get(); 2147 if (remaining < 100000) { 2148 /* for small delays (<100us), just loop until limit is reached */ 2149 do { 2150 end_time = ktime_get(); 2151 } while (ktime_compare(end_time, spin_until) < 0); 2152 } else { 2153 /* see do_nanosleep */ 2154 hrtimer_init_sleeper(&t, current); 2155 do { 2156 set_current_state(TASK_INTERRUPTIBLE); 2157 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2158 if (!hrtimer_active(&t.timer)) 2159 t.task = NULL; 2160 2161 if (likely(t.task)) 2162 schedule(); 2163 2164 hrtimer_cancel(&t.timer); 2165 } while (t.task && pkt_dev->running && !signal_pending(current)); 2166 __set_current_state(TASK_RUNNING); 2167 end_time = ktime_get(); 2168 } 2169 2170 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2171 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2172 } 2173 2174 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2175 { 2176 pkt_dev->pkt_overhead = 0; 2177 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2178 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2179 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2180 } 2181 2182 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2183 { 2184 return !!(pkt_dev->flows[flow].flags & F_INIT); 2185 } 2186 2187 static inline int f_pick(struct pktgen_dev *pkt_dev) 2188 { 2189 int flow = pkt_dev->curfl; 2190 2191 if (pkt_dev->flags & F_FLOW_SEQ) { 2192 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2193 /* reset time */ 2194 pkt_dev->flows[flow].count = 0; 2195 pkt_dev->flows[flow].flags = 0; 2196 pkt_dev->curfl += 1; 2197 if (pkt_dev->curfl >= pkt_dev->cflows) 2198 pkt_dev->curfl = 0; /*reset */ 2199 } 2200 } else { 2201 flow = prandom_u32() % pkt_dev->cflows; 2202 pkt_dev->curfl = flow; 2203 2204 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2205 pkt_dev->flows[flow].count = 0; 2206 pkt_dev->flows[flow].flags = 0; 2207 } 2208 } 2209 2210 return pkt_dev->curfl; 2211 } 2212 2213 2214 #ifdef CONFIG_XFRM 2215 /* If there was already an IPSEC SA, we keep it as is, else 2216 * we go look for it ... 2217 */ 2218 #define DUMMY_MARK 0 2219 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2220 { 2221 struct xfrm_state *x = pkt_dev->flows[flow].x; 2222 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2223 if (!x) { 2224 /*slow path: we dont already have xfrm_state*/ 2225 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2226 (xfrm_address_t *)&pkt_dev->cur_daddr, 2227 (xfrm_address_t *)&pkt_dev->cur_saddr, 2228 AF_INET, 2229 pkt_dev->ipsmode, 2230 pkt_dev->ipsproto, 0); 2231 if (x) { 2232 pkt_dev->flows[flow].x = x; 2233 set_pkt_overhead(pkt_dev); 2234 pkt_dev->pkt_overhead += x->props.header_len; 2235 } 2236 2237 } 2238 } 2239 #endif 2240 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2241 { 2242 2243 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2244 pkt_dev->cur_queue_map = smp_processor_id(); 2245 2246 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2247 __u16 t; 2248 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2249 t = prandom_u32() % 2250 (pkt_dev->queue_map_max - 2251 pkt_dev->queue_map_min + 1) 2252 + pkt_dev->queue_map_min; 2253 } else { 2254 t = pkt_dev->cur_queue_map + 1; 2255 if (t > pkt_dev->queue_map_max) 2256 t = pkt_dev->queue_map_min; 2257 } 2258 pkt_dev->cur_queue_map = t; 2259 } 2260 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2261 } 2262 2263 /* Increment/randomize headers according to flags and current values 2264 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2265 */ 2266 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2267 { 2268 __u32 imn; 2269 __u32 imx; 2270 int flow = 0; 2271 2272 if (pkt_dev->cflows) 2273 flow = f_pick(pkt_dev); 2274 2275 /* Deal with source MAC */ 2276 if (pkt_dev->src_mac_count > 1) { 2277 __u32 mc; 2278 __u32 tmp; 2279 2280 if (pkt_dev->flags & F_MACSRC_RND) 2281 mc = prandom_u32() % pkt_dev->src_mac_count; 2282 else { 2283 mc = pkt_dev->cur_src_mac_offset++; 2284 if (pkt_dev->cur_src_mac_offset >= 2285 pkt_dev->src_mac_count) 2286 pkt_dev->cur_src_mac_offset = 0; 2287 } 2288 2289 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2290 pkt_dev->hh[11] = tmp; 2291 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2292 pkt_dev->hh[10] = tmp; 2293 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2294 pkt_dev->hh[9] = tmp; 2295 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2296 pkt_dev->hh[8] = tmp; 2297 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2298 pkt_dev->hh[7] = tmp; 2299 } 2300 2301 /* Deal with Destination MAC */ 2302 if (pkt_dev->dst_mac_count > 1) { 2303 __u32 mc; 2304 __u32 tmp; 2305 2306 if (pkt_dev->flags & F_MACDST_RND) 2307 mc = prandom_u32() % pkt_dev->dst_mac_count; 2308 2309 else { 2310 mc = pkt_dev->cur_dst_mac_offset++; 2311 if (pkt_dev->cur_dst_mac_offset >= 2312 pkt_dev->dst_mac_count) { 2313 pkt_dev->cur_dst_mac_offset = 0; 2314 } 2315 } 2316 2317 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2318 pkt_dev->hh[5] = tmp; 2319 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2320 pkt_dev->hh[4] = tmp; 2321 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2322 pkt_dev->hh[3] = tmp; 2323 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2324 pkt_dev->hh[2] = tmp; 2325 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2326 pkt_dev->hh[1] = tmp; 2327 } 2328 2329 if (pkt_dev->flags & F_MPLS_RND) { 2330 unsigned int i; 2331 for (i = 0; i < pkt_dev->nr_labels; i++) 2332 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2333 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2334 ((__force __be32)prandom_u32() & 2335 htonl(0x000fffff)); 2336 } 2337 2338 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2339 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2340 } 2341 2342 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2343 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2344 } 2345 2346 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2347 if (pkt_dev->flags & F_UDPSRC_RND) 2348 pkt_dev->cur_udp_src = prandom_u32() % 2349 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2350 + pkt_dev->udp_src_min; 2351 2352 else { 2353 pkt_dev->cur_udp_src++; 2354 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2355 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2356 } 2357 } 2358 2359 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2360 if (pkt_dev->flags & F_UDPDST_RND) { 2361 pkt_dev->cur_udp_dst = prandom_u32() % 2362 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2363 + pkt_dev->udp_dst_min; 2364 } else { 2365 pkt_dev->cur_udp_dst++; 2366 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2367 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2368 } 2369 } 2370 2371 if (!(pkt_dev->flags & F_IPV6)) { 2372 2373 imn = ntohl(pkt_dev->saddr_min); 2374 imx = ntohl(pkt_dev->saddr_max); 2375 if (imn < imx) { 2376 __u32 t; 2377 if (pkt_dev->flags & F_IPSRC_RND) 2378 t = prandom_u32() % (imx - imn) + imn; 2379 else { 2380 t = ntohl(pkt_dev->cur_saddr); 2381 t++; 2382 if (t > imx) 2383 t = imn; 2384 2385 } 2386 pkt_dev->cur_saddr = htonl(t); 2387 } 2388 2389 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2390 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2391 } else { 2392 imn = ntohl(pkt_dev->daddr_min); 2393 imx = ntohl(pkt_dev->daddr_max); 2394 if (imn < imx) { 2395 __u32 t; 2396 __be32 s; 2397 if (pkt_dev->flags & F_IPDST_RND) { 2398 2399 do { 2400 t = prandom_u32() % 2401 (imx - imn) + imn; 2402 s = htonl(t); 2403 } while (ipv4_is_loopback(s) || 2404 ipv4_is_multicast(s) || 2405 ipv4_is_lbcast(s) || 2406 ipv4_is_zeronet(s) || 2407 ipv4_is_local_multicast(s)); 2408 pkt_dev->cur_daddr = s; 2409 } else { 2410 t = ntohl(pkt_dev->cur_daddr); 2411 t++; 2412 if (t > imx) { 2413 t = imn; 2414 } 2415 pkt_dev->cur_daddr = htonl(t); 2416 } 2417 } 2418 if (pkt_dev->cflows) { 2419 pkt_dev->flows[flow].flags |= F_INIT; 2420 pkt_dev->flows[flow].cur_daddr = 2421 pkt_dev->cur_daddr; 2422 #ifdef CONFIG_XFRM 2423 if (pkt_dev->flags & F_IPSEC_ON) 2424 get_ipsec_sa(pkt_dev, flow); 2425 #endif 2426 pkt_dev->nflows++; 2427 } 2428 } 2429 } else { /* IPV6 * */ 2430 2431 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2432 int i; 2433 2434 /* Only random destinations yet */ 2435 2436 for (i = 0; i < 4; i++) { 2437 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2438 (((__force __be32)prandom_u32() | 2439 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2440 pkt_dev->max_in6_daddr.s6_addr32[i]); 2441 } 2442 } 2443 } 2444 2445 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2446 __u32 t; 2447 if (pkt_dev->flags & F_TXSIZE_RND) { 2448 t = prandom_u32() % 2449 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2450 + pkt_dev->min_pkt_size; 2451 } else { 2452 t = pkt_dev->cur_pkt_size + 1; 2453 if (t > pkt_dev->max_pkt_size) 2454 t = pkt_dev->min_pkt_size; 2455 } 2456 pkt_dev->cur_pkt_size = t; 2457 } 2458 2459 set_cur_queue_map(pkt_dev); 2460 2461 pkt_dev->flows[flow].count++; 2462 } 2463 2464 2465 #ifdef CONFIG_XFRM 2466 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2467 { 2468 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2469 int err = 0; 2470 2471 if (!x) 2472 return 0; 2473 /* XXX: we dont support tunnel mode for now until 2474 * we resolve the dst issue */ 2475 if (x->props.mode != XFRM_MODE_TRANSPORT) 2476 return 0; 2477 2478 spin_lock(&x->lock); 2479 2480 err = x->outer_mode->output(x, skb); 2481 if (err) 2482 goto error; 2483 err = x->type->output(x, skb); 2484 if (err) 2485 goto error; 2486 2487 x->curlft.bytes += skb->len; 2488 x->curlft.packets++; 2489 error: 2490 spin_unlock(&x->lock); 2491 return err; 2492 } 2493 2494 static void free_SAs(struct pktgen_dev *pkt_dev) 2495 { 2496 if (pkt_dev->cflows) { 2497 /* let go of the SAs if we have them */ 2498 int i; 2499 for (i = 0; i < pkt_dev->cflows; i++) { 2500 struct xfrm_state *x = pkt_dev->flows[i].x; 2501 if (x) { 2502 xfrm_state_put(x); 2503 pkt_dev->flows[i].x = NULL; 2504 } 2505 } 2506 } 2507 } 2508 2509 static int process_ipsec(struct pktgen_dev *pkt_dev, 2510 struct sk_buff *skb, __be16 protocol) 2511 { 2512 if (pkt_dev->flags & F_IPSEC_ON) { 2513 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2514 int nhead = 0; 2515 if (x) { 2516 int ret; 2517 __u8 *eth; 2518 nhead = x->props.header_len - skb_headroom(skb); 2519 if (nhead > 0) { 2520 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2521 if (ret < 0) { 2522 pr_err("Error expanding ipsec packet %d\n", 2523 ret); 2524 goto err; 2525 } 2526 } 2527 2528 /* ipsec is not expecting ll header */ 2529 skb_pull(skb, ETH_HLEN); 2530 ret = pktgen_output_ipsec(skb, pkt_dev); 2531 if (ret) { 2532 pr_err("Error creating ipsec packet %d\n", ret); 2533 goto err; 2534 } 2535 /* restore ll */ 2536 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2537 memcpy(eth, pkt_dev->hh, 12); 2538 *(u16 *) ð[12] = protocol; 2539 } 2540 } 2541 return 1; 2542 err: 2543 kfree_skb(skb); 2544 return 0; 2545 } 2546 #endif 2547 2548 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2549 { 2550 unsigned int i; 2551 for (i = 0; i < pkt_dev->nr_labels; i++) 2552 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2553 2554 mpls--; 2555 *mpls |= MPLS_STACK_BOTTOM; 2556 } 2557 2558 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2559 unsigned int prio) 2560 { 2561 return htons(id | (cfi << 12) | (prio << 13)); 2562 } 2563 2564 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2565 int datalen) 2566 { 2567 struct timeval timestamp; 2568 struct pktgen_hdr *pgh; 2569 2570 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2571 datalen -= sizeof(*pgh); 2572 2573 if (pkt_dev->nfrags <= 0) { 2574 memset(skb_put(skb, datalen), 0, datalen); 2575 } else { 2576 int frags = pkt_dev->nfrags; 2577 int i, len; 2578 int frag_len; 2579 2580 2581 if (frags > MAX_SKB_FRAGS) 2582 frags = MAX_SKB_FRAGS; 2583 len = datalen - frags * PAGE_SIZE; 2584 if (len > 0) { 2585 memset(skb_put(skb, len), 0, len); 2586 datalen = frags * PAGE_SIZE; 2587 } 2588 2589 i = 0; 2590 frag_len = (datalen/frags) < PAGE_SIZE ? 2591 (datalen/frags) : PAGE_SIZE; 2592 while (datalen > 0) { 2593 if (unlikely(!pkt_dev->page)) { 2594 int node = numa_node_id(); 2595 2596 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2597 node = pkt_dev->node; 2598 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2599 if (!pkt_dev->page) 2600 break; 2601 } 2602 get_page(pkt_dev->page); 2603 skb_frag_set_page(skb, i, pkt_dev->page); 2604 skb_shinfo(skb)->frags[i].page_offset = 0; 2605 /*last fragment, fill rest of data*/ 2606 if (i == (frags - 1)) 2607 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2608 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2609 else 2610 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2611 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2612 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2613 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2614 i++; 2615 skb_shinfo(skb)->nr_frags = i; 2616 } 2617 } 2618 2619 /* Stamp the time, and sequence number, 2620 * convert them to network byte order 2621 */ 2622 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2623 pgh->seq_num = htonl(pkt_dev->seq_num); 2624 2625 do_gettimeofday(×tamp); 2626 pgh->tv_sec = htonl(timestamp.tv_sec); 2627 pgh->tv_usec = htonl(timestamp.tv_usec); 2628 } 2629 2630 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2631 struct pktgen_dev *pkt_dev, 2632 unsigned int extralen) 2633 { 2634 struct sk_buff *skb = NULL; 2635 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2636 pkt_dev->pkt_overhead; 2637 2638 if (pkt_dev->flags & F_NODE) { 2639 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2640 2641 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2642 if (likely(skb)) { 2643 skb_reserve(skb, NET_SKB_PAD); 2644 skb->dev = dev; 2645 } 2646 } else { 2647 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2648 } 2649 2650 return skb; 2651 } 2652 2653 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2654 struct pktgen_dev *pkt_dev) 2655 { 2656 struct sk_buff *skb = NULL; 2657 __u8 *eth; 2658 struct udphdr *udph; 2659 int datalen, iplen; 2660 struct iphdr *iph; 2661 __be16 protocol = htons(ETH_P_IP); 2662 __be32 *mpls; 2663 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2664 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2665 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2666 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2667 u16 queue_map; 2668 2669 if (pkt_dev->nr_labels) 2670 protocol = htons(ETH_P_MPLS_UC); 2671 2672 if (pkt_dev->vlan_id != 0xffff) 2673 protocol = htons(ETH_P_8021Q); 2674 2675 /* Update any of the values, used when we're incrementing various 2676 * fields. 2677 */ 2678 mod_cur_headers(pkt_dev); 2679 queue_map = pkt_dev->cur_queue_map; 2680 2681 datalen = (odev->hard_header_len + 16) & ~0xf; 2682 2683 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2684 if (!skb) { 2685 sprintf(pkt_dev->result, "No memory"); 2686 return NULL; 2687 } 2688 2689 prefetchw(skb->data); 2690 skb_reserve(skb, datalen); 2691 2692 /* Reserve for ethernet and IP header */ 2693 eth = (__u8 *) skb_push(skb, 14); 2694 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2695 if (pkt_dev->nr_labels) 2696 mpls_push(mpls, pkt_dev); 2697 2698 if (pkt_dev->vlan_id != 0xffff) { 2699 if (pkt_dev->svlan_id != 0xffff) { 2700 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2701 *svlan_tci = build_tci(pkt_dev->svlan_id, 2702 pkt_dev->svlan_cfi, 2703 pkt_dev->svlan_p); 2704 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2705 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2706 } 2707 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2708 *vlan_tci = build_tci(pkt_dev->vlan_id, 2709 pkt_dev->vlan_cfi, 2710 pkt_dev->vlan_p); 2711 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2712 *vlan_encapsulated_proto = htons(ETH_P_IP); 2713 } 2714 2715 skb_set_mac_header(skb, 0); 2716 skb_set_network_header(skb, skb->len); 2717 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2718 2719 skb_set_transport_header(skb, skb->len); 2720 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2721 skb_set_queue_mapping(skb, queue_map); 2722 skb->priority = pkt_dev->skb_priority; 2723 2724 memcpy(eth, pkt_dev->hh, 12); 2725 *(__be16 *) & eth[12] = protocol; 2726 2727 /* Eth + IPh + UDPh + mpls */ 2728 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2729 pkt_dev->pkt_overhead; 2730 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2731 datalen = sizeof(struct pktgen_hdr); 2732 2733 udph->source = htons(pkt_dev->cur_udp_src); 2734 udph->dest = htons(pkt_dev->cur_udp_dst); 2735 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2736 udph->check = 0; /* No checksum */ 2737 2738 iph->ihl = 5; 2739 iph->version = 4; 2740 iph->ttl = 32; 2741 iph->tos = pkt_dev->tos; 2742 iph->protocol = IPPROTO_UDP; /* UDP */ 2743 iph->saddr = pkt_dev->cur_saddr; 2744 iph->daddr = pkt_dev->cur_daddr; 2745 iph->id = htons(pkt_dev->ip_id); 2746 pkt_dev->ip_id++; 2747 iph->frag_off = 0; 2748 iplen = 20 + 8 + datalen; 2749 iph->tot_len = htons(iplen); 2750 iph->check = 0; 2751 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2752 skb->protocol = protocol; 2753 skb->dev = odev; 2754 skb->pkt_type = PACKET_HOST; 2755 pktgen_finalize_skb(pkt_dev, skb, datalen); 2756 2757 #ifdef CONFIG_XFRM 2758 if (!process_ipsec(pkt_dev, skb, protocol)) 2759 return NULL; 2760 #endif 2761 2762 return skb; 2763 } 2764 2765 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2766 struct pktgen_dev *pkt_dev) 2767 { 2768 struct sk_buff *skb = NULL; 2769 __u8 *eth; 2770 struct udphdr *udph; 2771 int datalen; 2772 struct ipv6hdr *iph; 2773 __be16 protocol = htons(ETH_P_IPV6); 2774 __be32 *mpls; 2775 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2776 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2777 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2778 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2779 u16 queue_map; 2780 2781 if (pkt_dev->nr_labels) 2782 protocol = htons(ETH_P_MPLS_UC); 2783 2784 if (pkt_dev->vlan_id != 0xffff) 2785 protocol = htons(ETH_P_8021Q); 2786 2787 /* Update any of the values, used when we're incrementing various 2788 * fields. 2789 */ 2790 mod_cur_headers(pkt_dev); 2791 queue_map = pkt_dev->cur_queue_map; 2792 2793 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2794 if (!skb) { 2795 sprintf(pkt_dev->result, "No memory"); 2796 return NULL; 2797 } 2798 2799 prefetchw(skb->data); 2800 skb_reserve(skb, 16); 2801 2802 /* Reserve for ethernet and IP header */ 2803 eth = (__u8 *) skb_push(skb, 14); 2804 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2805 if (pkt_dev->nr_labels) 2806 mpls_push(mpls, pkt_dev); 2807 2808 if (pkt_dev->vlan_id != 0xffff) { 2809 if (pkt_dev->svlan_id != 0xffff) { 2810 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2811 *svlan_tci = build_tci(pkt_dev->svlan_id, 2812 pkt_dev->svlan_cfi, 2813 pkt_dev->svlan_p); 2814 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2815 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2816 } 2817 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2818 *vlan_tci = build_tci(pkt_dev->vlan_id, 2819 pkt_dev->vlan_cfi, 2820 pkt_dev->vlan_p); 2821 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2822 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2823 } 2824 2825 skb_set_mac_header(skb, 0); 2826 skb_set_network_header(skb, skb->len); 2827 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2828 2829 skb_set_transport_header(skb, skb->len); 2830 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2831 skb_set_queue_mapping(skb, queue_map); 2832 skb->priority = pkt_dev->skb_priority; 2833 2834 memcpy(eth, pkt_dev->hh, 12); 2835 *(__be16 *) ð[12] = protocol; 2836 2837 /* Eth + IPh + UDPh + mpls */ 2838 datalen = pkt_dev->cur_pkt_size - 14 - 2839 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2840 pkt_dev->pkt_overhead; 2841 2842 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2843 datalen = sizeof(struct pktgen_hdr); 2844 net_info_ratelimited("increased datalen to %d\n", datalen); 2845 } 2846 2847 udph->source = htons(pkt_dev->cur_udp_src); 2848 udph->dest = htons(pkt_dev->cur_udp_dst); 2849 udph->len = htons(datalen + sizeof(struct udphdr)); 2850 udph->check = 0; /* No checksum */ 2851 2852 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2853 2854 if (pkt_dev->traffic_class) { 2855 /* Version + traffic class + flow (0) */ 2856 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2857 } 2858 2859 iph->hop_limit = 32; 2860 2861 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2862 iph->nexthdr = IPPROTO_UDP; 2863 2864 iph->daddr = pkt_dev->cur_in6_daddr; 2865 iph->saddr = pkt_dev->cur_in6_saddr; 2866 2867 skb->protocol = protocol; 2868 skb->dev = odev; 2869 skb->pkt_type = PACKET_HOST; 2870 2871 pktgen_finalize_skb(pkt_dev, skb, datalen); 2872 2873 return skb; 2874 } 2875 2876 static struct sk_buff *fill_packet(struct net_device *odev, 2877 struct pktgen_dev *pkt_dev) 2878 { 2879 if (pkt_dev->flags & F_IPV6) 2880 return fill_packet_ipv6(odev, pkt_dev); 2881 else 2882 return fill_packet_ipv4(odev, pkt_dev); 2883 } 2884 2885 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2886 { 2887 pkt_dev->seq_num = 1; 2888 pkt_dev->idle_acc = 0; 2889 pkt_dev->sofar = 0; 2890 pkt_dev->tx_bytes = 0; 2891 pkt_dev->errors = 0; 2892 } 2893 2894 /* Set up structure for sending pkts, clear counters */ 2895 2896 static void pktgen_run(struct pktgen_thread *t) 2897 { 2898 struct pktgen_dev *pkt_dev; 2899 int started = 0; 2900 2901 func_enter(); 2902 2903 if_lock(t); 2904 list_for_each_entry(pkt_dev, &t->if_list, list) { 2905 2906 /* 2907 * setup odev and create initial packet. 2908 */ 2909 pktgen_setup_inject(pkt_dev); 2910 2911 if (pkt_dev->odev) { 2912 pktgen_clear_counters(pkt_dev); 2913 pkt_dev->running = 1; /* Cranke yeself! */ 2914 pkt_dev->skb = NULL; 2915 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 2916 2917 set_pkt_overhead(pkt_dev); 2918 2919 strcpy(pkt_dev->result, "Starting"); 2920 started++; 2921 } else 2922 strcpy(pkt_dev->result, "Error starting"); 2923 } 2924 if_unlock(t); 2925 if (started) 2926 t->control &= ~(T_STOP); 2927 } 2928 2929 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 2930 { 2931 struct pktgen_thread *t; 2932 2933 func_enter(); 2934 2935 mutex_lock(&pktgen_thread_lock); 2936 2937 list_for_each_entry(t, &pn->pktgen_threads, th_list) 2938 t->control |= T_STOP; 2939 2940 mutex_unlock(&pktgen_thread_lock); 2941 } 2942 2943 static int thread_is_running(const struct pktgen_thread *t) 2944 { 2945 const struct pktgen_dev *pkt_dev; 2946 2947 list_for_each_entry(pkt_dev, &t->if_list, list) 2948 if (pkt_dev->running) 2949 return 1; 2950 return 0; 2951 } 2952 2953 static int pktgen_wait_thread_run(struct pktgen_thread *t) 2954 { 2955 if_lock(t); 2956 2957 while (thread_is_running(t)) { 2958 2959 if_unlock(t); 2960 2961 msleep_interruptible(100); 2962 2963 if (signal_pending(current)) 2964 goto signal; 2965 if_lock(t); 2966 } 2967 if_unlock(t); 2968 return 1; 2969 signal: 2970 return 0; 2971 } 2972 2973 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 2974 { 2975 struct pktgen_thread *t; 2976 int sig = 1; 2977 2978 mutex_lock(&pktgen_thread_lock); 2979 2980 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 2981 sig = pktgen_wait_thread_run(t); 2982 if (sig == 0) 2983 break; 2984 } 2985 2986 if (sig == 0) 2987 list_for_each_entry(t, &pn->pktgen_threads, th_list) 2988 t->control |= (T_STOP); 2989 2990 mutex_unlock(&pktgen_thread_lock); 2991 return sig; 2992 } 2993 2994 static void pktgen_run_all_threads(struct pktgen_net *pn) 2995 { 2996 struct pktgen_thread *t; 2997 2998 func_enter(); 2999 3000 mutex_lock(&pktgen_thread_lock); 3001 3002 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3003 t->control |= (T_RUN); 3004 3005 mutex_unlock(&pktgen_thread_lock); 3006 3007 /* Propagate thread->control */ 3008 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3009 3010 pktgen_wait_all_threads_run(pn); 3011 } 3012 3013 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3014 { 3015 struct pktgen_thread *t; 3016 3017 func_enter(); 3018 3019 mutex_lock(&pktgen_thread_lock); 3020 3021 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3022 t->control |= (T_REMDEVALL); 3023 3024 mutex_unlock(&pktgen_thread_lock); 3025 3026 /* Propagate thread->control */ 3027 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3028 3029 pktgen_wait_all_threads_run(pn); 3030 } 3031 3032 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3033 { 3034 __u64 bps, mbps, pps; 3035 char *p = pkt_dev->result; 3036 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3037 pkt_dev->started_at); 3038 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3039 3040 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3041 (unsigned long long)ktime_to_us(elapsed), 3042 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3043 (unsigned long long)ktime_to_us(idle), 3044 (unsigned long long)pkt_dev->sofar, 3045 pkt_dev->cur_pkt_size, nr_frags); 3046 3047 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3048 ktime_to_ns(elapsed)); 3049 3050 bps = pps * 8 * pkt_dev->cur_pkt_size; 3051 3052 mbps = bps; 3053 do_div(mbps, 1000000); 3054 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3055 (unsigned long long)pps, 3056 (unsigned long long)mbps, 3057 (unsigned long long)bps, 3058 (unsigned long long)pkt_dev->errors); 3059 } 3060 3061 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3062 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3063 { 3064 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3065 3066 if (!pkt_dev->running) { 3067 pr_warning("interface: %s is already stopped\n", 3068 pkt_dev->odevname); 3069 return -EINVAL; 3070 } 3071 3072 kfree_skb(pkt_dev->skb); 3073 pkt_dev->skb = NULL; 3074 pkt_dev->stopped_at = ktime_get(); 3075 pkt_dev->running = 0; 3076 3077 show_results(pkt_dev, nr_frags); 3078 3079 return 0; 3080 } 3081 3082 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3083 { 3084 struct pktgen_dev *pkt_dev, *best = NULL; 3085 3086 if_lock(t); 3087 3088 list_for_each_entry(pkt_dev, &t->if_list, list) { 3089 if (!pkt_dev->running) 3090 continue; 3091 if (best == NULL) 3092 best = pkt_dev; 3093 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3094 best = pkt_dev; 3095 } 3096 if_unlock(t); 3097 return best; 3098 } 3099 3100 static void pktgen_stop(struct pktgen_thread *t) 3101 { 3102 struct pktgen_dev *pkt_dev; 3103 3104 func_enter(); 3105 3106 if_lock(t); 3107 3108 list_for_each_entry(pkt_dev, &t->if_list, list) { 3109 pktgen_stop_device(pkt_dev); 3110 } 3111 3112 if_unlock(t); 3113 } 3114 3115 /* 3116 * one of our devices needs to be removed - find it 3117 * and remove it 3118 */ 3119 static void pktgen_rem_one_if(struct pktgen_thread *t) 3120 { 3121 struct list_head *q, *n; 3122 struct pktgen_dev *cur; 3123 3124 func_enter(); 3125 3126 if_lock(t); 3127 3128 list_for_each_safe(q, n, &t->if_list) { 3129 cur = list_entry(q, struct pktgen_dev, list); 3130 3131 if (!cur->removal_mark) 3132 continue; 3133 3134 kfree_skb(cur->skb); 3135 cur->skb = NULL; 3136 3137 pktgen_remove_device(t, cur); 3138 3139 break; 3140 } 3141 3142 if_unlock(t); 3143 } 3144 3145 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3146 { 3147 struct list_head *q, *n; 3148 struct pktgen_dev *cur; 3149 3150 func_enter(); 3151 3152 /* Remove all devices, free mem */ 3153 3154 if_lock(t); 3155 3156 list_for_each_safe(q, n, &t->if_list) { 3157 cur = list_entry(q, struct pktgen_dev, list); 3158 3159 kfree_skb(cur->skb); 3160 cur->skb = NULL; 3161 3162 pktgen_remove_device(t, cur); 3163 } 3164 3165 if_unlock(t); 3166 } 3167 3168 static void pktgen_rem_thread(struct pktgen_thread *t) 3169 { 3170 /* Remove from the thread list */ 3171 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3172 } 3173 3174 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3175 { 3176 ktime_t idle_start = ktime_get(); 3177 schedule(); 3178 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3179 } 3180 3181 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3182 { 3183 ktime_t idle_start = ktime_get(); 3184 3185 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3186 if (signal_pending(current)) 3187 break; 3188 3189 if (need_resched()) 3190 pktgen_resched(pkt_dev); 3191 else 3192 cpu_relax(); 3193 } 3194 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3195 } 3196 3197 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3198 { 3199 struct net_device *odev = pkt_dev->odev; 3200 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3201 = odev->netdev_ops->ndo_start_xmit; 3202 struct netdev_queue *txq; 3203 u16 queue_map; 3204 int ret; 3205 3206 /* If device is offline, then don't send */ 3207 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3208 pktgen_stop_device(pkt_dev); 3209 return; 3210 } 3211 3212 /* This is max DELAY, this has special meaning of 3213 * "never transmit" 3214 */ 3215 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3216 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3217 return; 3218 } 3219 3220 /* If no skb or clone count exhausted then get new one */ 3221 if (!pkt_dev->skb || (pkt_dev->last_ok && 3222 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3223 /* build a new pkt */ 3224 kfree_skb(pkt_dev->skb); 3225 3226 pkt_dev->skb = fill_packet(odev, pkt_dev); 3227 if (pkt_dev->skb == NULL) { 3228 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3229 schedule(); 3230 pkt_dev->clone_count--; /* back out increment, OOM */ 3231 return; 3232 } 3233 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3234 pkt_dev->allocated_skbs++; 3235 pkt_dev->clone_count = 0; /* reset counter */ 3236 } 3237 3238 if (pkt_dev->delay && pkt_dev->last_ok) 3239 spin(pkt_dev, pkt_dev->next_tx); 3240 3241 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3242 txq = netdev_get_tx_queue(odev, queue_map); 3243 3244 __netif_tx_lock_bh(txq); 3245 3246 if (unlikely(netif_xmit_frozen_or_stopped(txq))) { 3247 ret = NETDEV_TX_BUSY; 3248 pkt_dev->last_ok = 0; 3249 goto unlock; 3250 } 3251 atomic_inc(&(pkt_dev->skb->users)); 3252 ret = (*xmit)(pkt_dev->skb, odev); 3253 3254 switch (ret) { 3255 case NETDEV_TX_OK: 3256 txq_trans_update(txq); 3257 pkt_dev->last_ok = 1; 3258 pkt_dev->sofar++; 3259 pkt_dev->seq_num++; 3260 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3261 break; 3262 case NET_XMIT_DROP: 3263 case NET_XMIT_CN: 3264 case NET_XMIT_POLICED: 3265 /* skb has been consumed */ 3266 pkt_dev->errors++; 3267 break; 3268 default: /* Drivers are not supposed to return other values! */ 3269 net_info_ratelimited("%s xmit error: %d\n", 3270 pkt_dev->odevname, ret); 3271 pkt_dev->errors++; 3272 /* fallthru */ 3273 case NETDEV_TX_LOCKED: 3274 case NETDEV_TX_BUSY: 3275 /* Retry it next time */ 3276 atomic_dec(&(pkt_dev->skb->users)); 3277 pkt_dev->last_ok = 0; 3278 } 3279 unlock: 3280 __netif_tx_unlock_bh(txq); 3281 3282 /* If pkt_dev->count is zero, then run forever */ 3283 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3284 pktgen_wait_for_skb(pkt_dev); 3285 3286 /* Done with this */ 3287 pktgen_stop_device(pkt_dev); 3288 } 3289 } 3290 3291 /* 3292 * Main loop of the thread goes here 3293 */ 3294 3295 static int pktgen_thread_worker(void *arg) 3296 { 3297 DEFINE_WAIT(wait); 3298 struct pktgen_thread *t = arg; 3299 struct pktgen_dev *pkt_dev = NULL; 3300 int cpu = t->cpu; 3301 3302 BUG_ON(smp_processor_id() != cpu); 3303 3304 init_waitqueue_head(&t->queue); 3305 complete(&t->start_done); 3306 3307 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3308 3309 set_current_state(TASK_INTERRUPTIBLE); 3310 3311 set_freezable(); 3312 3313 while (!kthread_should_stop()) { 3314 pkt_dev = next_to_run(t); 3315 3316 if (unlikely(!pkt_dev && t->control == 0)) { 3317 if (t->net->pktgen_exiting) 3318 break; 3319 wait_event_interruptible_timeout(t->queue, 3320 t->control != 0, 3321 HZ/10); 3322 try_to_freeze(); 3323 continue; 3324 } 3325 3326 __set_current_state(TASK_RUNNING); 3327 3328 if (likely(pkt_dev)) { 3329 pktgen_xmit(pkt_dev); 3330 3331 if (need_resched()) 3332 pktgen_resched(pkt_dev); 3333 else 3334 cpu_relax(); 3335 } 3336 3337 if (t->control & T_STOP) { 3338 pktgen_stop(t); 3339 t->control &= ~(T_STOP); 3340 } 3341 3342 if (t->control & T_RUN) { 3343 pktgen_run(t); 3344 t->control &= ~(T_RUN); 3345 } 3346 3347 if (t->control & T_REMDEVALL) { 3348 pktgen_rem_all_ifs(t); 3349 t->control &= ~(T_REMDEVALL); 3350 } 3351 3352 if (t->control & T_REMDEV) { 3353 pktgen_rem_one_if(t); 3354 t->control &= ~(T_REMDEV); 3355 } 3356 3357 try_to_freeze(); 3358 3359 set_current_state(TASK_INTERRUPTIBLE); 3360 } 3361 3362 pr_debug("%s stopping all device\n", t->tsk->comm); 3363 pktgen_stop(t); 3364 3365 pr_debug("%s removing all device\n", t->tsk->comm); 3366 pktgen_rem_all_ifs(t); 3367 3368 pr_debug("%s removing thread\n", t->tsk->comm); 3369 pktgen_rem_thread(t); 3370 3371 /* Wait for kthread_stop */ 3372 while (!kthread_should_stop()) { 3373 set_current_state(TASK_INTERRUPTIBLE); 3374 schedule(); 3375 } 3376 __set_current_state(TASK_RUNNING); 3377 3378 return 0; 3379 } 3380 3381 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3382 const char *ifname, bool exact) 3383 { 3384 struct pktgen_dev *p, *pkt_dev = NULL; 3385 size_t len = strlen(ifname); 3386 3387 if_lock(t); 3388 list_for_each_entry(p, &t->if_list, list) 3389 if (strncmp(p->odevname, ifname, len) == 0) { 3390 if (p->odevname[len]) { 3391 if (exact || p->odevname[len] != '@') 3392 continue; 3393 } 3394 pkt_dev = p; 3395 break; 3396 } 3397 3398 if_unlock(t); 3399 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3400 return pkt_dev; 3401 } 3402 3403 /* 3404 * Adds a dev at front of if_list. 3405 */ 3406 3407 static int add_dev_to_thread(struct pktgen_thread *t, 3408 struct pktgen_dev *pkt_dev) 3409 { 3410 int rv = 0; 3411 3412 if_lock(t); 3413 3414 if (pkt_dev->pg_thread) { 3415 pr_err("ERROR: already assigned to a thread\n"); 3416 rv = -EBUSY; 3417 goto out; 3418 } 3419 3420 list_add(&pkt_dev->list, &t->if_list); 3421 pkt_dev->pg_thread = t; 3422 pkt_dev->running = 0; 3423 3424 out: 3425 if_unlock(t); 3426 return rv; 3427 } 3428 3429 /* Called under thread lock */ 3430 3431 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3432 { 3433 struct pktgen_dev *pkt_dev; 3434 int err; 3435 int node = cpu_to_node(t->cpu); 3436 3437 /* We don't allow a device to be on several threads */ 3438 3439 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3440 if (pkt_dev) { 3441 pr_err("ERROR: interface already used\n"); 3442 return -EBUSY; 3443 } 3444 3445 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3446 if (!pkt_dev) 3447 return -ENOMEM; 3448 3449 strcpy(pkt_dev->odevname, ifname); 3450 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3451 node); 3452 if (pkt_dev->flows == NULL) { 3453 kfree(pkt_dev); 3454 return -ENOMEM; 3455 } 3456 3457 pkt_dev->removal_mark = 0; 3458 pkt_dev->nfrags = 0; 3459 pkt_dev->delay = pg_delay_d; 3460 pkt_dev->count = pg_count_d; 3461 pkt_dev->sofar = 0; 3462 pkt_dev->udp_src_min = 9; /* sink port */ 3463 pkt_dev->udp_src_max = 9; 3464 pkt_dev->udp_dst_min = 9; 3465 pkt_dev->udp_dst_max = 9; 3466 pkt_dev->vlan_p = 0; 3467 pkt_dev->vlan_cfi = 0; 3468 pkt_dev->vlan_id = 0xffff; 3469 pkt_dev->svlan_p = 0; 3470 pkt_dev->svlan_cfi = 0; 3471 pkt_dev->svlan_id = 0xffff; 3472 pkt_dev->node = -1; 3473 3474 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3475 if (err) 3476 goto out1; 3477 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3478 pkt_dev->clone_skb = pg_clone_skb_d; 3479 3480 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3481 &pktgen_if_fops, pkt_dev); 3482 if (!pkt_dev->entry) { 3483 pr_err("cannot create %s/%s procfs entry\n", 3484 PG_PROC_DIR, ifname); 3485 err = -EINVAL; 3486 goto out2; 3487 } 3488 #ifdef CONFIG_XFRM 3489 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3490 pkt_dev->ipsproto = IPPROTO_ESP; 3491 #endif 3492 3493 return add_dev_to_thread(t, pkt_dev); 3494 out2: 3495 dev_put(pkt_dev->odev); 3496 out1: 3497 #ifdef CONFIG_XFRM 3498 free_SAs(pkt_dev); 3499 #endif 3500 vfree(pkt_dev->flows); 3501 kfree(pkt_dev); 3502 return err; 3503 } 3504 3505 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3506 { 3507 struct pktgen_thread *t; 3508 struct proc_dir_entry *pe; 3509 struct task_struct *p; 3510 3511 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3512 cpu_to_node(cpu)); 3513 if (!t) { 3514 pr_err("ERROR: out of memory, can't create new thread\n"); 3515 return -ENOMEM; 3516 } 3517 3518 spin_lock_init(&t->if_lock); 3519 t->cpu = cpu; 3520 3521 INIT_LIST_HEAD(&t->if_list); 3522 3523 list_add_tail(&t->th_list, &pn->pktgen_threads); 3524 init_completion(&t->start_done); 3525 3526 p = kthread_create_on_node(pktgen_thread_worker, 3527 t, 3528 cpu_to_node(cpu), 3529 "kpktgend_%d", cpu); 3530 if (IS_ERR(p)) { 3531 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3532 list_del(&t->th_list); 3533 kfree(t); 3534 return PTR_ERR(p); 3535 } 3536 kthread_bind(p, cpu); 3537 t->tsk = p; 3538 3539 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3540 &pktgen_thread_fops, t); 3541 if (!pe) { 3542 pr_err("cannot create %s/%s procfs entry\n", 3543 PG_PROC_DIR, t->tsk->comm); 3544 kthread_stop(p); 3545 list_del(&t->th_list); 3546 kfree(t); 3547 return -EINVAL; 3548 } 3549 3550 t->net = pn; 3551 wake_up_process(p); 3552 wait_for_completion(&t->start_done); 3553 3554 return 0; 3555 } 3556 3557 /* 3558 * Removes a device from the thread if_list. 3559 */ 3560 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3561 struct pktgen_dev *pkt_dev) 3562 { 3563 struct list_head *q, *n; 3564 struct pktgen_dev *p; 3565 3566 list_for_each_safe(q, n, &t->if_list) { 3567 p = list_entry(q, struct pktgen_dev, list); 3568 if (p == pkt_dev) 3569 list_del(&p->list); 3570 } 3571 } 3572 3573 static int pktgen_remove_device(struct pktgen_thread *t, 3574 struct pktgen_dev *pkt_dev) 3575 { 3576 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3577 3578 if (pkt_dev->running) { 3579 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3580 pktgen_stop_device(pkt_dev); 3581 } 3582 3583 /* Dis-associate from the interface */ 3584 3585 if (pkt_dev->odev) { 3586 dev_put(pkt_dev->odev); 3587 pkt_dev->odev = NULL; 3588 } 3589 3590 /* And update the thread if_list */ 3591 3592 _rem_dev_from_if_list(t, pkt_dev); 3593 3594 if (pkt_dev->entry) 3595 proc_remove(pkt_dev->entry); 3596 3597 #ifdef CONFIG_XFRM 3598 free_SAs(pkt_dev); 3599 #endif 3600 vfree(pkt_dev->flows); 3601 if (pkt_dev->page) 3602 put_page(pkt_dev->page); 3603 kfree(pkt_dev); 3604 return 0; 3605 } 3606 3607 static int __net_init pg_net_init(struct net *net) 3608 { 3609 struct pktgen_net *pn = net_generic(net, pg_net_id); 3610 struct proc_dir_entry *pe; 3611 int cpu, ret = 0; 3612 3613 pn->net = net; 3614 INIT_LIST_HEAD(&pn->pktgen_threads); 3615 pn->pktgen_exiting = false; 3616 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3617 if (!pn->proc_dir) { 3618 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3619 return -ENODEV; 3620 } 3621 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3622 if (pe == NULL) { 3623 pr_err("cannot create %s procfs entry\n", PGCTRL); 3624 ret = -EINVAL; 3625 goto remove; 3626 } 3627 3628 for_each_online_cpu(cpu) { 3629 int err; 3630 3631 err = pktgen_create_thread(cpu, pn); 3632 if (err) 3633 pr_warn("Cannot create thread for cpu %d (%d)\n", 3634 cpu, err); 3635 } 3636 3637 if (list_empty(&pn->pktgen_threads)) { 3638 pr_err("Initialization failed for all threads\n"); 3639 ret = -ENODEV; 3640 goto remove_entry; 3641 } 3642 3643 return 0; 3644 3645 remove_entry: 3646 remove_proc_entry(PGCTRL, pn->proc_dir); 3647 remove: 3648 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3649 return ret; 3650 } 3651 3652 static void __net_exit pg_net_exit(struct net *net) 3653 { 3654 struct pktgen_net *pn = net_generic(net, pg_net_id); 3655 struct pktgen_thread *t; 3656 struct list_head *q, *n; 3657 LIST_HEAD(list); 3658 3659 /* Stop all interfaces & threads */ 3660 pn->pktgen_exiting = true; 3661 3662 mutex_lock(&pktgen_thread_lock); 3663 list_splice_init(&pn->pktgen_threads, &list); 3664 mutex_unlock(&pktgen_thread_lock); 3665 3666 list_for_each_safe(q, n, &list) { 3667 t = list_entry(q, struct pktgen_thread, th_list); 3668 list_del(&t->th_list); 3669 kthread_stop(t->tsk); 3670 kfree(t); 3671 } 3672 3673 remove_proc_entry(PGCTRL, pn->proc_dir); 3674 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3675 } 3676 3677 static struct pernet_operations pg_net_ops = { 3678 .init = pg_net_init, 3679 .exit = pg_net_exit, 3680 .id = &pg_net_id, 3681 .size = sizeof(struct pktgen_net), 3682 }; 3683 3684 static int __init pg_init(void) 3685 { 3686 int ret = 0; 3687 3688 pr_info("%s", version); 3689 ret = register_pernet_subsys(&pg_net_ops); 3690 if (ret) 3691 return ret; 3692 ret = register_netdevice_notifier(&pktgen_notifier_block); 3693 if (ret) 3694 unregister_pernet_subsys(&pg_net_ops); 3695 3696 return ret; 3697 } 3698 3699 static void __exit pg_cleanup(void) 3700 { 3701 unregister_netdevice_notifier(&pktgen_notifier_block); 3702 unregister_pernet_subsys(&pg_net_ops); 3703 } 3704 3705 module_init(pg_init); 3706 module_exit(pg_cleanup); 3707 3708 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3709 MODULE_DESCRIPTION("Packet Generator tool"); 3710 MODULE_LICENSE("GPL"); 3711 MODULE_VERSION(VERSION); 3712 module_param(pg_count_d, int, 0); 3713 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3714 module_param(pg_delay_d, int, 0); 3715 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3716 module_param(pg_clone_skb_d, int, 0); 3717 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3718 module_param(debug, int, 0); 3719 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3720