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/udp.h> 164 #include <net/ip6_checksum.h> 165 #include <net/addrconf.h> 166 #ifdef CONFIG_XFRM 167 #include <net/xfrm.h> 168 #endif 169 #include <net/netns/generic.h> 170 #include <asm/byteorder.h> 171 #include <linux/rcupdate.h> 172 #include <linux/bitops.h> 173 #include <linux/io.h> 174 #include <linux/timex.h> 175 #include <linux/uaccess.h> 176 #include <asm/dma.h> 177 #include <asm/div64.h> /* do_div */ 178 179 #define VERSION "2.74" 180 #define IP_NAME_SZ 32 181 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 182 #define MPLS_STACK_BOTTOM htonl(0x00000100) 183 184 #define func_enter() pr_debug("entering %s\n", __func__); 185 186 /* Device flag bits */ 187 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 188 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 189 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 190 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 191 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 192 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 193 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 194 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 195 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 196 #define F_VID_RND (1<<9) /* Random VLAN ID */ 197 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 198 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 199 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 200 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 201 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 202 #define F_NODE (1<<15) /* Node memory alloc*/ 203 #define F_UDPCSUM (1<<16) /* Include UDP checksum */ 204 205 /* Thread control flag bits */ 206 #define T_STOP (1<<0) /* Stop run */ 207 #define T_RUN (1<<1) /* Start run */ 208 #define T_REMDEVALL (1<<2) /* Remove all devs */ 209 #define T_REMDEV (1<<3) /* Remove one dev */ 210 211 /* If lock -- can be removed after some work */ 212 #define if_lock(t) spin_lock(&(t->if_lock)); 213 #define if_unlock(t) spin_unlock(&(t->if_lock)); 214 215 /* Used to help with determining the pkts on receive */ 216 #define PKTGEN_MAGIC 0xbe9be955 217 #define PG_PROC_DIR "pktgen" 218 #define PGCTRL "pgctrl" 219 220 #define MAX_CFLOWS 65536 221 222 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 223 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 224 225 struct flow_state { 226 __be32 cur_daddr; 227 int count; 228 #ifdef CONFIG_XFRM 229 struct xfrm_state *x; 230 #endif 231 __u32 flags; 232 }; 233 234 /* flow flag bits */ 235 #define F_INIT (1<<0) /* flow has been initialized */ 236 237 struct pktgen_dev { 238 /* 239 * Try to keep frequent/infrequent used vars. separated. 240 */ 241 struct proc_dir_entry *entry; /* proc file */ 242 struct pktgen_thread *pg_thread;/* the owner */ 243 struct list_head list; /* chaining in the thread's run-queue */ 244 245 int running; /* if false, the test will stop */ 246 247 /* If min != max, then we will either do a linear iteration, or 248 * we will do a random selection from within the range. 249 */ 250 __u32 flags; 251 int removal_mark; /* non-zero => the device is marked for 252 * removal by worker thread */ 253 254 int min_pkt_size; 255 int max_pkt_size; 256 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 257 int nfrags; 258 struct page *page; 259 u64 delay; /* nano-seconds */ 260 261 __u64 count; /* Default No packets to send */ 262 __u64 sofar; /* How many pkts we've sent so far */ 263 __u64 tx_bytes; /* How many bytes we've transmitted */ 264 __u64 errors; /* Errors when trying to transmit, */ 265 266 /* runtime counters relating to clone_skb */ 267 268 __u64 allocated_skbs; 269 __u32 clone_count; 270 int last_ok; /* Was last skb sent? 271 * Or a failed transmit of some sort? 272 * This will keep sequence numbers in order 273 */ 274 ktime_t next_tx; 275 ktime_t started_at; 276 ktime_t stopped_at; 277 u64 idle_acc; /* nano-seconds */ 278 279 __u32 seq_num; 280 281 int clone_skb; /* 282 * Use multiple SKBs during packet gen. 283 * If this number is greater than 1, then 284 * that many copies of the same packet will be 285 * sent before a new packet is allocated. 286 * If you want to send 1024 identical packets 287 * before creating a new packet, 288 * set clone_skb to 1024. 289 */ 290 291 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 292 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 293 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 294 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 295 296 struct in6_addr in6_saddr; 297 struct in6_addr in6_daddr; 298 struct in6_addr cur_in6_daddr; 299 struct in6_addr cur_in6_saddr; 300 /* For ranges */ 301 struct in6_addr min_in6_daddr; 302 struct in6_addr max_in6_daddr; 303 struct in6_addr min_in6_saddr; 304 struct in6_addr max_in6_saddr; 305 306 /* If we're doing ranges, random or incremental, then this 307 * defines the min/max for those ranges. 308 */ 309 __be32 saddr_min; /* inclusive, source IP address */ 310 __be32 saddr_max; /* exclusive, source IP address */ 311 __be32 daddr_min; /* inclusive, dest IP address */ 312 __be32 daddr_max; /* exclusive, dest IP address */ 313 314 __u16 udp_src_min; /* inclusive, source UDP port */ 315 __u16 udp_src_max; /* exclusive, source UDP port */ 316 __u16 udp_dst_min; /* inclusive, dest UDP port */ 317 __u16 udp_dst_max; /* exclusive, dest UDP port */ 318 319 /* DSCP + ECN */ 320 __u8 tos; /* six MSB of (former) IPv4 TOS 321 are for dscp codepoint */ 322 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 323 (see RFC 3260, sec. 4) */ 324 325 /* MPLS */ 326 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 327 __be32 labels[MAX_MPLS_LABELS]; 328 329 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 330 __u8 vlan_p; 331 __u8 vlan_cfi; 332 __u16 vlan_id; /* 0xffff means no vlan tag */ 333 334 __u8 svlan_p; 335 __u8 svlan_cfi; 336 __u16 svlan_id; /* 0xffff means no svlan tag */ 337 338 __u32 src_mac_count; /* How many MACs to iterate through */ 339 __u32 dst_mac_count; /* How many MACs to iterate through */ 340 341 unsigned char dst_mac[ETH_ALEN]; 342 unsigned char src_mac[ETH_ALEN]; 343 344 __u32 cur_dst_mac_offset; 345 __u32 cur_src_mac_offset; 346 __be32 cur_saddr; 347 __be32 cur_daddr; 348 __u16 ip_id; 349 __u16 cur_udp_dst; 350 __u16 cur_udp_src; 351 __u16 cur_queue_map; 352 __u32 cur_pkt_size; 353 __u32 last_pkt_size; 354 355 __u8 hh[14]; 356 /* = { 357 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 358 359 We fill in SRC address later 360 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 361 0x08, 0x00 362 }; 363 */ 364 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 365 366 struct sk_buff *skb; /* skb we are to transmit next, used for when we 367 * are transmitting the same one multiple times 368 */ 369 struct net_device *odev; /* The out-going device. 370 * Note that the device should have it's 371 * pg_info pointer pointing back to this 372 * device. 373 * Set when the user specifies the out-going 374 * device name (not when the inject is 375 * started as it used to do.) 376 */ 377 char odevname[32]; 378 struct flow_state *flows; 379 unsigned int cflows; /* Concurrent flows (config) */ 380 unsigned int lflow; /* Flow length (config) */ 381 unsigned int nflows; /* accumulated flows (stats) */ 382 unsigned int curfl; /* current sequenced flow (state)*/ 383 384 u16 queue_map_min; 385 u16 queue_map_max; 386 __u32 skb_priority; /* skb priority field */ 387 int node; /* Memory node */ 388 389 #ifdef CONFIG_XFRM 390 __u8 ipsmode; /* IPSEC mode (config) */ 391 __u8 ipsproto; /* IPSEC type (config) */ 392 #endif 393 char result[512]; 394 }; 395 396 struct pktgen_hdr { 397 __be32 pgh_magic; 398 __be32 seq_num; 399 __be32 tv_sec; 400 __be32 tv_usec; 401 }; 402 403 404 static int pg_net_id __read_mostly; 405 406 struct pktgen_net { 407 struct net *net; 408 struct proc_dir_entry *proc_dir; 409 struct list_head pktgen_threads; 410 bool pktgen_exiting; 411 }; 412 413 struct pktgen_thread { 414 spinlock_t if_lock; /* for list of devices */ 415 struct list_head if_list; /* All device here */ 416 struct list_head th_list; 417 struct task_struct *tsk; 418 char result[512]; 419 420 /* Field for thread to receive "posted" events terminate, 421 stop ifs etc. */ 422 423 u32 control; 424 int cpu; 425 426 wait_queue_head_t queue; 427 struct completion start_done; 428 struct pktgen_net *net; 429 }; 430 431 #define REMOVE 1 432 #define FIND 0 433 434 static const char version[] = 435 "Packet Generator for packet performance testing. " 436 "Version: " VERSION "\n"; 437 438 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 439 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 440 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 441 const char *ifname, bool exact); 442 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 443 static void pktgen_run_all_threads(struct pktgen_net *pn); 444 static void pktgen_reset_all_threads(struct pktgen_net *pn); 445 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); 446 447 static void pktgen_stop(struct pktgen_thread *t); 448 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 449 450 /* Module parameters, defaults. */ 451 static int pg_count_d __read_mostly = 1000; 452 static int pg_delay_d __read_mostly; 453 static int pg_clone_skb_d __read_mostly; 454 static int debug __read_mostly; 455 456 static DEFINE_MUTEX(pktgen_thread_lock); 457 458 static struct notifier_block pktgen_notifier_block = { 459 .notifier_call = pktgen_device_event, 460 }; 461 462 /* 463 * /proc handling functions 464 * 465 */ 466 467 static int pgctrl_show(struct seq_file *seq, void *v) 468 { 469 seq_puts(seq, version); 470 return 0; 471 } 472 473 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 474 size_t count, loff_t *ppos) 475 { 476 int err = 0; 477 char data[128]; 478 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 479 480 if (!capable(CAP_NET_ADMIN)) { 481 err = -EPERM; 482 goto out; 483 } 484 485 if (count > sizeof(data)) 486 count = sizeof(data); 487 488 if (copy_from_user(data, buf, count)) { 489 err = -EFAULT; 490 goto out; 491 } 492 data[count - 1] = 0; /* Make string */ 493 494 if (!strcmp(data, "stop")) 495 pktgen_stop_all_threads_ifs(pn); 496 497 else if (!strcmp(data, "start")) 498 pktgen_run_all_threads(pn); 499 500 else if (!strcmp(data, "reset")) 501 pktgen_reset_all_threads(pn); 502 503 else 504 pr_warning("Unknown command: %s\n", data); 505 506 err = count; 507 508 out: 509 return err; 510 } 511 512 static int pgctrl_open(struct inode *inode, struct file *file) 513 { 514 return single_open(file, pgctrl_show, PDE_DATA(inode)); 515 } 516 517 static const struct file_operations pktgen_fops = { 518 .owner = THIS_MODULE, 519 .open = pgctrl_open, 520 .read = seq_read, 521 .llseek = seq_lseek, 522 .write = pgctrl_write, 523 .release = single_release, 524 }; 525 526 static int pktgen_if_show(struct seq_file *seq, void *v) 527 { 528 const struct pktgen_dev *pkt_dev = seq->private; 529 ktime_t stopped; 530 u64 idle; 531 532 seq_printf(seq, 533 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 534 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 535 pkt_dev->max_pkt_size); 536 537 seq_printf(seq, 538 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 539 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 540 pkt_dev->clone_skb, pkt_dev->odevname); 541 542 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 543 pkt_dev->lflow); 544 545 seq_printf(seq, 546 " queue_map_min: %u queue_map_max: %u\n", 547 pkt_dev->queue_map_min, 548 pkt_dev->queue_map_max); 549 550 if (pkt_dev->skb_priority) 551 seq_printf(seq, " skb_priority: %u\n", 552 pkt_dev->skb_priority); 553 554 if (pkt_dev->flags & F_IPV6) { 555 seq_printf(seq, 556 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 557 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 558 &pkt_dev->in6_saddr, 559 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 560 &pkt_dev->in6_daddr, 561 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 562 } else { 563 seq_printf(seq, 564 " dst_min: %s dst_max: %s\n", 565 pkt_dev->dst_min, pkt_dev->dst_max); 566 seq_printf(seq, 567 " src_min: %s src_max: %s\n", 568 pkt_dev->src_min, pkt_dev->src_max); 569 } 570 571 seq_puts(seq, " src_mac: "); 572 573 seq_printf(seq, "%pM ", 574 is_zero_ether_addr(pkt_dev->src_mac) ? 575 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 576 577 seq_printf(seq, "dst_mac: "); 578 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 579 580 seq_printf(seq, 581 " udp_src_min: %d udp_src_max: %d" 582 " udp_dst_min: %d udp_dst_max: %d\n", 583 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 584 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 585 586 seq_printf(seq, 587 " src_mac_count: %d dst_mac_count: %d\n", 588 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 589 590 if (pkt_dev->nr_labels) { 591 unsigned int i; 592 seq_printf(seq, " mpls: "); 593 for (i = 0; i < pkt_dev->nr_labels; i++) 594 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 595 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 596 } 597 598 if (pkt_dev->vlan_id != 0xffff) 599 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 600 pkt_dev->vlan_id, pkt_dev->vlan_p, 601 pkt_dev->vlan_cfi); 602 603 if (pkt_dev->svlan_id != 0xffff) 604 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 605 pkt_dev->svlan_id, pkt_dev->svlan_p, 606 pkt_dev->svlan_cfi); 607 608 if (pkt_dev->tos) 609 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 610 611 if (pkt_dev->traffic_class) 612 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 613 614 if (pkt_dev->node >= 0) 615 seq_printf(seq, " node: %d\n", pkt_dev->node); 616 617 seq_printf(seq, " Flags: "); 618 619 if (pkt_dev->flags & F_IPV6) 620 seq_printf(seq, "IPV6 "); 621 622 if (pkt_dev->flags & F_IPSRC_RND) 623 seq_printf(seq, "IPSRC_RND "); 624 625 if (pkt_dev->flags & F_IPDST_RND) 626 seq_printf(seq, "IPDST_RND "); 627 628 if (pkt_dev->flags & F_TXSIZE_RND) 629 seq_printf(seq, "TXSIZE_RND "); 630 631 if (pkt_dev->flags & F_UDPSRC_RND) 632 seq_printf(seq, "UDPSRC_RND "); 633 634 if (pkt_dev->flags & F_UDPDST_RND) 635 seq_printf(seq, "UDPDST_RND "); 636 637 if (pkt_dev->flags & F_UDPCSUM) 638 seq_printf(seq, "UDPCSUM "); 639 640 if (pkt_dev->flags & F_MPLS_RND) 641 seq_printf(seq, "MPLS_RND "); 642 643 if (pkt_dev->flags & F_QUEUE_MAP_RND) 644 seq_printf(seq, "QUEUE_MAP_RND "); 645 646 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 647 seq_printf(seq, "QUEUE_MAP_CPU "); 648 649 if (pkt_dev->cflows) { 650 if (pkt_dev->flags & F_FLOW_SEQ) 651 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 652 else 653 seq_printf(seq, "FLOW_RND "); 654 } 655 656 #ifdef CONFIG_XFRM 657 if (pkt_dev->flags & F_IPSEC_ON) 658 seq_printf(seq, "IPSEC "); 659 #endif 660 661 if (pkt_dev->flags & F_MACSRC_RND) 662 seq_printf(seq, "MACSRC_RND "); 663 664 if (pkt_dev->flags & F_MACDST_RND) 665 seq_printf(seq, "MACDST_RND "); 666 667 if (pkt_dev->flags & F_VID_RND) 668 seq_printf(seq, "VID_RND "); 669 670 if (pkt_dev->flags & F_SVID_RND) 671 seq_printf(seq, "SVID_RND "); 672 673 if (pkt_dev->flags & F_NODE) 674 seq_printf(seq, "NODE_ALLOC "); 675 676 seq_puts(seq, "\n"); 677 678 /* not really stopped, more like last-running-at */ 679 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 680 idle = pkt_dev->idle_acc; 681 do_div(idle, NSEC_PER_USEC); 682 683 seq_printf(seq, 684 "Current:\n pkts-sofar: %llu errors: %llu\n", 685 (unsigned long long)pkt_dev->sofar, 686 (unsigned long long)pkt_dev->errors); 687 688 seq_printf(seq, 689 " started: %lluus stopped: %lluus idle: %lluus\n", 690 (unsigned long long) ktime_to_us(pkt_dev->started_at), 691 (unsigned long long) ktime_to_us(stopped), 692 (unsigned long long) idle); 693 694 seq_printf(seq, 695 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 696 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 697 pkt_dev->cur_src_mac_offset); 698 699 if (pkt_dev->flags & F_IPV6) { 700 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 701 &pkt_dev->cur_in6_saddr, 702 &pkt_dev->cur_in6_daddr); 703 } else 704 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 705 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 706 707 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 708 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 709 710 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 711 712 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 713 714 if (pkt_dev->result[0]) 715 seq_printf(seq, "Result: %s\n", pkt_dev->result); 716 else 717 seq_printf(seq, "Result: Idle\n"); 718 719 return 0; 720 } 721 722 723 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 724 __u32 *num) 725 { 726 int i = 0; 727 *num = 0; 728 729 for (; i < maxlen; i++) { 730 int value; 731 char c; 732 *num <<= 4; 733 if (get_user(c, &user_buffer[i])) 734 return -EFAULT; 735 value = hex_to_bin(c); 736 if (value >= 0) 737 *num |= value; 738 else 739 break; 740 } 741 return i; 742 } 743 744 static int count_trail_chars(const char __user * user_buffer, 745 unsigned int maxlen) 746 { 747 int i; 748 749 for (i = 0; i < maxlen; i++) { 750 char c; 751 if (get_user(c, &user_buffer[i])) 752 return -EFAULT; 753 switch (c) { 754 case '\"': 755 case '\n': 756 case '\r': 757 case '\t': 758 case ' ': 759 case '=': 760 break; 761 default: 762 goto done; 763 } 764 } 765 done: 766 return i; 767 } 768 769 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 770 unsigned long *num) 771 { 772 int i; 773 *num = 0; 774 775 for (i = 0; i < maxlen; i++) { 776 char c; 777 if (get_user(c, &user_buffer[i])) 778 return -EFAULT; 779 if ((c >= '0') && (c <= '9')) { 780 *num *= 10; 781 *num += c - '0'; 782 } else 783 break; 784 } 785 return i; 786 } 787 788 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 789 { 790 int i; 791 792 for (i = 0; i < maxlen; i++) { 793 char c; 794 if (get_user(c, &user_buffer[i])) 795 return -EFAULT; 796 switch (c) { 797 case '\"': 798 case '\n': 799 case '\r': 800 case '\t': 801 case ' ': 802 goto done_str; 803 break; 804 default: 805 break; 806 } 807 } 808 done_str: 809 return i; 810 } 811 812 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 813 { 814 unsigned int n = 0; 815 char c; 816 ssize_t i = 0; 817 int len; 818 819 pkt_dev->nr_labels = 0; 820 do { 821 __u32 tmp; 822 len = hex32_arg(&buffer[i], 8, &tmp); 823 if (len <= 0) 824 return len; 825 pkt_dev->labels[n] = htonl(tmp); 826 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 827 pkt_dev->flags |= F_MPLS_RND; 828 i += len; 829 if (get_user(c, &buffer[i])) 830 return -EFAULT; 831 i++; 832 n++; 833 if (n >= MAX_MPLS_LABELS) 834 return -E2BIG; 835 } while (c == ','); 836 837 pkt_dev->nr_labels = n; 838 return i; 839 } 840 841 static ssize_t pktgen_if_write(struct file *file, 842 const char __user * user_buffer, size_t count, 843 loff_t * offset) 844 { 845 struct seq_file *seq = file->private_data; 846 struct pktgen_dev *pkt_dev = seq->private; 847 int i, max, len; 848 char name[16], valstr[32]; 849 unsigned long value = 0; 850 char *pg_result = NULL; 851 int tmp = 0; 852 char buf[128]; 853 854 pg_result = &(pkt_dev->result[0]); 855 856 if (count < 1) { 857 pr_warning("wrong command format\n"); 858 return -EINVAL; 859 } 860 861 max = count; 862 tmp = count_trail_chars(user_buffer, max); 863 if (tmp < 0) { 864 pr_warning("illegal format\n"); 865 return tmp; 866 } 867 i = tmp; 868 869 /* Read variable name */ 870 871 len = strn_len(&user_buffer[i], sizeof(name) - 1); 872 if (len < 0) 873 return len; 874 875 memset(name, 0, sizeof(name)); 876 if (copy_from_user(name, &user_buffer[i], len)) 877 return -EFAULT; 878 i += len; 879 880 max = count - i; 881 len = count_trail_chars(&user_buffer[i], max); 882 if (len < 0) 883 return len; 884 885 i += len; 886 887 if (debug) { 888 size_t copy = min_t(size_t, count, 1023); 889 char tb[copy + 1]; 890 if (copy_from_user(tb, user_buffer, copy)) 891 return -EFAULT; 892 tb[copy] = 0; 893 pr_debug("%s,%lu buffer -:%s:-\n", 894 name, (unsigned long)count, tb); 895 } 896 897 if (!strcmp(name, "min_pkt_size")) { 898 len = num_arg(&user_buffer[i], 10, &value); 899 if (len < 0) 900 return len; 901 902 i += len; 903 if (value < 14 + 20 + 8) 904 value = 14 + 20 + 8; 905 if (value != pkt_dev->min_pkt_size) { 906 pkt_dev->min_pkt_size = value; 907 pkt_dev->cur_pkt_size = value; 908 } 909 sprintf(pg_result, "OK: min_pkt_size=%u", 910 pkt_dev->min_pkt_size); 911 return count; 912 } 913 914 if (!strcmp(name, "max_pkt_size")) { 915 len = num_arg(&user_buffer[i], 10, &value); 916 if (len < 0) 917 return len; 918 919 i += len; 920 if (value < 14 + 20 + 8) 921 value = 14 + 20 + 8; 922 if (value != pkt_dev->max_pkt_size) { 923 pkt_dev->max_pkt_size = value; 924 pkt_dev->cur_pkt_size = value; 925 } 926 sprintf(pg_result, "OK: max_pkt_size=%u", 927 pkt_dev->max_pkt_size); 928 return count; 929 } 930 931 /* Shortcut for min = max */ 932 933 if (!strcmp(name, "pkt_size")) { 934 len = num_arg(&user_buffer[i], 10, &value); 935 if (len < 0) 936 return len; 937 938 i += len; 939 if (value < 14 + 20 + 8) 940 value = 14 + 20 + 8; 941 if (value != pkt_dev->min_pkt_size) { 942 pkt_dev->min_pkt_size = value; 943 pkt_dev->max_pkt_size = value; 944 pkt_dev->cur_pkt_size = value; 945 } 946 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 947 return count; 948 } 949 950 if (!strcmp(name, "debug")) { 951 len = num_arg(&user_buffer[i], 10, &value); 952 if (len < 0) 953 return len; 954 955 i += len; 956 debug = value; 957 sprintf(pg_result, "OK: debug=%u", debug); 958 return count; 959 } 960 961 if (!strcmp(name, "frags")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) 964 return len; 965 966 i += len; 967 pkt_dev->nfrags = value; 968 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 969 return count; 970 } 971 if (!strcmp(name, "delay")) { 972 len = num_arg(&user_buffer[i], 10, &value); 973 if (len < 0) 974 return len; 975 976 i += len; 977 if (value == 0x7FFFFFFF) 978 pkt_dev->delay = ULLONG_MAX; 979 else 980 pkt_dev->delay = (u64)value; 981 982 sprintf(pg_result, "OK: delay=%llu", 983 (unsigned long long) pkt_dev->delay); 984 return count; 985 } 986 if (!strcmp(name, "rate")) { 987 len = num_arg(&user_buffer[i], 10, &value); 988 if (len < 0) 989 return len; 990 991 i += len; 992 if (!value) 993 return len; 994 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 995 if (debug) 996 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 997 998 sprintf(pg_result, "OK: rate=%lu", value); 999 return count; 1000 } 1001 if (!strcmp(name, "ratep")) { 1002 len = num_arg(&user_buffer[i], 10, &value); 1003 if (len < 0) 1004 return len; 1005 1006 i += len; 1007 if (!value) 1008 return len; 1009 pkt_dev->delay = NSEC_PER_SEC/value; 1010 if (debug) 1011 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1012 1013 sprintf(pg_result, "OK: rate=%lu", value); 1014 return count; 1015 } 1016 if (!strcmp(name, "udp_src_min")) { 1017 len = num_arg(&user_buffer[i], 10, &value); 1018 if (len < 0) 1019 return len; 1020 1021 i += len; 1022 if (value != pkt_dev->udp_src_min) { 1023 pkt_dev->udp_src_min = value; 1024 pkt_dev->cur_udp_src = value; 1025 } 1026 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1027 return count; 1028 } 1029 if (!strcmp(name, "udp_dst_min")) { 1030 len = num_arg(&user_buffer[i], 10, &value); 1031 if (len < 0) 1032 return len; 1033 1034 i += len; 1035 if (value != pkt_dev->udp_dst_min) { 1036 pkt_dev->udp_dst_min = value; 1037 pkt_dev->cur_udp_dst = value; 1038 } 1039 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1040 return count; 1041 } 1042 if (!strcmp(name, "udp_src_max")) { 1043 len = num_arg(&user_buffer[i], 10, &value); 1044 if (len < 0) 1045 return len; 1046 1047 i += len; 1048 if (value != pkt_dev->udp_src_max) { 1049 pkt_dev->udp_src_max = value; 1050 pkt_dev->cur_udp_src = value; 1051 } 1052 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1053 return count; 1054 } 1055 if (!strcmp(name, "udp_dst_max")) { 1056 len = num_arg(&user_buffer[i], 10, &value); 1057 if (len < 0) 1058 return len; 1059 1060 i += len; 1061 if (value != pkt_dev->udp_dst_max) { 1062 pkt_dev->udp_dst_max = value; 1063 pkt_dev->cur_udp_dst = value; 1064 } 1065 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1066 return count; 1067 } 1068 if (!strcmp(name, "clone_skb")) { 1069 len = num_arg(&user_buffer[i], 10, &value); 1070 if (len < 0) 1071 return len; 1072 if ((value > 0) && 1073 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1074 return -ENOTSUPP; 1075 i += len; 1076 pkt_dev->clone_skb = value; 1077 1078 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1079 return count; 1080 } 1081 if (!strcmp(name, "count")) { 1082 len = num_arg(&user_buffer[i], 10, &value); 1083 if (len < 0) 1084 return len; 1085 1086 i += len; 1087 pkt_dev->count = value; 1088 sprintf(pg_result, "OK: count=%llu", 1089 (unsigned long long)pkt_dev->count); 1090 return count; 1091 } 1092 if (!strcmp(name, "src_mac_count")) { 1093 len = num_arg(&user_buffer[i], 10, &value); 1094 if (len < 0) 1095 return len; 1096 1097 i += len; 1098 if (pkt_dev->src_mac_count != value) { 1099 pkt_dev->src_mac_count = value; 1100 pkt_dev->cur_src_mac_offset = 0; 1101 } 1102 sprintf(pg_result, "OK: src_mac_count=%d", 1103 pkt_dev->src_mac_count); 1104 return count; 1105 } 1106 if (!strcmp(name, "dst_mac_count")) { 1107 len = num_arg(&user_buffer[i], 10, &value); 1108 if (len < 0) 1109 return len; 1110 1111 i += len; 1112 if (pkt_dev->dst_mac_count != value) { 1113 pkt_dev->dst_mac_count = value; 1114 pkt_dev->cur_dst_mac_offset = 0; 1115 } 1116 sprintf(pg_result, "OK: dst_mac_count=%d", 1117 pkt_dev->dst_mac_count); 1118 return count; 1119 } 1120 if (!strcmp(name, "node")) { 1121 len = num_arg(&user_buffer[i], 10, &value); 1122 if (len < 0) 1123 return len; 1124 1125 i += len; 1126 1127 if (node_possible(value)) { 1128 pkt_dev->node = value; 1129 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1130 if (pkt_dev->page) { 1131 put_page(pkt_dev->page); 1132 pkt_dev->page = NULL; 1133 } 1134 } 1135 else 1136 sprintf(pg_result, "ERROR: node not possible"); 1137 return count; 1138 } 1139 if (!strcmp(name, "flag")) { 1140 char f[32]; 1141 memset(f, 0, 32); 1142 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1143 if (len < 0) 1144 return len; 1145 1146 if (copy_from_user(f, &user_buffer[i], len)) 1147 return -EFAULT; 1148 i += len; 1149 if (strcmp(f, "IPSRC_RND") == 0) 1150 pkt_dev->flags |= F_IPSRC_RND; 1151 1152 else if (strcmp(f, "!IPSRC_RND") == 0) 1153 pkt_dev->flags &= ~F_IPSRC_RND; 1154 1155 else if (strcmp(f, "TXSIZE_RND") == 0) 1156 pkt_dev->flags |= F_TXSIZE_RND; 1157 1158 else if (strcmp(f, "!TXSIZE_RND") == 0) 1159 pkt_dev->flags &= ~F_TXSIZE_RND; 1160 1161 else if (strcmp(f, "IPDST_RND") == 0) 1162 pkt_dev->flags |= F_IPDST_RND; 1163 1164 else if (strcmp(f, "!IPDST_RND") == 0) 1165 pkt_dev->flags &= ~F_IPDST_RND; 1166 1167 else if (strcmp(f, "UDPSRC_RND") == 0) 1168 pkt_dev->flags |= F_UDPSRC_RND; 1169 1170 else if (strcmp(f, "!UDPSRC_RND") == 0) 1171 pkt_dev->flags &= ~F_UDPSRC_RND; 1172 1173 else if (strcmp(f, "UDPDST_RND") == 0) 1174 pkt_dev->flags |= F_UDPDST_RND; 1175 1176 else if (strcmp(f, "!UDPDST_RND") == 0) 1177 pkt_dev->flags &= ~F_UDPDST_RND; 1178 1179 else if (strcmp(f, "MACSRC_RND") == 0) 1180 pkt_dev->flags |= F_MACSRC_RND; 1181 1182 else if (strcmp(f, "!MACSRC_RND") == 0) 1183 pkt_dev->flags &= ~F_MACSRC_RND; 1184 1185 else if (strcmp(f, "MACDST_RND") == 0) 1186 pkt_dev->flags |= F_MACDST_RND; 1187 1188 else if (strcmp(f, "!MACDST_RND") == 0) 1189 pkt_dev->flags &= ~F_MACDST_RND; 1190 1191 else if (strcmp(f, "MPLS_RND") == 0) 1192 pkt_dev->flags |= F_MPLS_RND; 1193 1194 else if (strcmp(f, "!MPLS_RND") == 0) 1195 pkt_dev->flags &= ~F_MPLS_RND; 1196 1197 else if (strcmp(f, "VID_RND") == 0) 1198 pkt_dev->flags |= F_VID_RND; 1199 1200 else if (strcmp(f, "!VID_RND") == 0) 1201 pkt_dev->flags &= ~F_VID_RND; 1202 1203 else if (strcmp(f, "SVID_RND") == 0) 1204 pkt_dev->flags |= F_SVID_RND; 1205 1206 else if (strcmp(f, "!SVID_RND") == 0) 1207 pkt_dev->flags &= ~F_SVID_RND; 1208 1209 else if (strcmp(f, "FLOW_SEQ") == 0) 1210 pkt_dev->flags |= F_FLOW_SEQ; 1211 1212 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1213 pkt_dev->flags |= F_QUEUE_MAP_RND; 1214 1215 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1216 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1217 1218 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1219 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1220 1221 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1222 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1223 #ifdef CONFIG_XFRM 1224 else if (strcmp(f, "IPSEC") == 0) 1225 pkt_dev->flags |= F_IPSEC_ON; 1226 #endif 1227 1228 else if (strcmp(f, "!IPV6") == 0) 1229 pkt_dev->flags &= ~F_IPV6; 1230 1231 else if (strcmp(f, "NODE_ALLOC") == 0) 1232 pkt_dev->flags |= F_NODE; 1233 1234 else if (strcmp(f, "!NODE_ALLOC") == 0) 1235 pkt_dev->flags &= ~F_NODE; 1236 1237 else if (strcmp(f, "UDPCSUM") == 0) 1238 pkt_dev->flags |= F_UDPCSUM; 1239 1240 else if (strcmp(f, "!UDPCSUM") == 0) 1241 pkt_dev->flags &= ~F_UDPCSUM; 1242 1243 else { 1244 sprintf(pg_result, 1245 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1246 f, 1247 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1248 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1249 return count; 1250 } 1251 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1252 return count; 1253 } 1254 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1255 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1256 if (len < 0) 1257 return len; 1258 1259 if (copy_from_user(buf, &user_buffer[i], len)) 1260 return -EFAULT; 1261 buf[len] = 0; 1262 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1263 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1264 strncpy(pkt_dev->dst_min, buf, len); 1265 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1266 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1267 } 1268 if (debug) 1269 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1270 i += len; 1271 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1272 return count; 1273 } 1274 if (!strcmp(name, "dst_max")) { 1275 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1276 if (len < 0) 1277 return len; 1278 1279 1280 if (copy_from_user(buf, &user_buffer[i], len)) 1281 return -EFAULT; 1282 1283 buf[len] = 0; 1284 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1285 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1286 strncpy(pkt_dev->dst_max, buf, len); 1287 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1288 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1289 } 1290 if (debug) 1291 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1292 i += len; 1293 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1294 return count; 1295 } 1296 if (!strcmp(name, "dst6")) { 1297 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1298 if (len < 0) 1299 return len; 1300 1301 pkt_dev->flags |= F_IPV6; 1302 1303 if (copy_from_user(buf, &user_buffer[i], len)) 1304 return -EFAULT; 1305 buf[len] = 0; 1306 1307 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1308 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1309 1310 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1311 1312 if (debug) 1313 pr_debug("dst6 set to: %s\n", buf); 1314 1315 i += len; 1316 sprintf(pg_result, "OK: dst6=%s", buf); 1317 return count; 1318 } 1319 if (!strcmp(name, "dst6_min")) { 1320 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1321 if (len < 0) 1322 return len; 1323 1324 pkt_dev->flags |= F_IPV6; 1325 1326 if (copy_from_user(buf, &user_buffer[i], len)) 1327 return -EFAULT; 1328 buf[len] = 0; 1329 1330 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1331 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1332 1333 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1334 if (debug) 1335 pr_debug("dst6_min set to: %s\n", buf); 1336 1337 i += len; 1338 sprintf(pg_result, "OK: dst6_min=%s", buf); 1339 return count; 1340 } 1341 if (!strcmp(name, "dst6_max")) { 1342 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1343 if (len < 0) 1344 return len; 1345 1346 pkt_dev->flags |= F_IPV6; 1347 1348 if (copy_from_user(buf, &user_buffer[i], len)) 1349 return -EFAULT; 1350 buf[len] = 0; 1351 1352 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1353 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1354 1355 if (debug) 1356 pr_debug("dst6_max set to: %s\n", buf); 1357 1358 i += len; 1359 sprintf(pg_result, "OK: dst6_max=%s", buf); 1360 return count; 1361 } 1362 if (!strcmp(name, "src6")) { 1363 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1364 if (len < 0) 1365 return len; 1366 1367 pkt_dev->flags |= F_IPV6; 1368 1369 if (copy_from_user(buf, &user_buffer[i], len)) 1370 return -EFAULT; 1371 buf[len] = 0; 1372 1373 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1374 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1375 1376 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1377 1378 if (debug) 1379 pr_debug("src6 set to: %s\n", buf); 1380 1381 i += len; 1382 sprintf(pg_result, "OK: src6=%s", buf); 1383 return count; 1384 } 1385 if (!strcmp(name, "src_min")) { 1386 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1387 if (len < 0) 1388 return len; 1389 1390 if (copy_from_user(buf, &user_buffer[i], len)) 1391 return -EFAULT; 1392 buf[len] = 0; 1393 if (strcmp(buf, pkt_dev->src_min) != 0) { 1394 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1395 strncpy(pkt_dev->src_min, buf, len); 1396 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1397 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1398 } 1399 if (debug) 1400 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1401 i += len; 1402 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1403 return count; 1404 } 1405 if (!strcmp(name, "src_max")) { 1406 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1407 if (len < 0) 1408 return len; 1409 1410 if (copy_from_user(buf, &user_buffer[i], len)) 1411 return -EFAULT; 1412 buf[len] = 0; 1413 if (strcmp(buf, pkt_dev->src_max) != 0) { 1414 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1415 strncpy(pkt_dev->src_max, buf, len); 1416 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1417 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1418 } 1419 if (debug) 1420 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1421 i += len; 1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1423 return count; 1424 } 1425 if (!strcmp(name, "dst_mac")) { 1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1427 if (len < 0) 1428 return len; 1429 1430 memset(valstr, 0, sizeof(valstr)); 1431 if (copy_from_user(valstr, &user_buffer[i], len)) 1432 return -EFAULT; 1433 1434 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1435 return -EINVAL; 1436 /* Set up Dest MAC */ 1437 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1438 1439 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1440 return count; 1441 } 1442 if (!strcmp(name, "src_mac")) { 1443 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1444 if (len < 0) 1445 return len; 1446 1447 memset(valstr, 0, sizeof(valstr)); 1448 if (copy_from_user(valstr, &user_buffer[i], len)) 1449 return -EFAULT; 1450 1451 if (!mac_pton(valstr, pkt_dev->src_mac)) 1452 return -EINVAL; 1453 /* Set up Src MAC */ 1454 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1455 1456 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1457 return count; 1458 } 1459 1460 if (!strcmp(name, "clear_counters")) { 1461 pktgen_clear_counters(pkt_dev); 1462 sprintf(pg_result, "OK: Clearing counters.\n"); 1463 return count; 1464 } 1465 1466 if (!strcmp(name, "flows")) { 1467 len = num_arg(&user_buffer[i], 10, &value); 1468 if (len < 0) 1469 return len; 1470 1471 i += len; 1472 if (value > MAX_CFLOWS) 1473 value = MAX_CFLOWS; 1474 1475 pkt_dev->cflows = value; 1476 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1477 return count; 1478 } 1479 1480 if (!strcmp(name, "flowlen")) { 1481 len = num_arg(&user_buffer[i], 10, &value); 1482 if (len < 0) 1483 return len; 1484 1485 i += len; 1486 pkt_dev->lflow = value; 1487 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1488 return count; 1489 } 1490 1491 if (!strcmp(name, "queue_map_min")) { 1492 len = num_arg(&user_buffer[i], 5, &value); 1493 if (len < 0) 1494 return len; 1495 1496 i += len; 1497 pkt_dev->queue_map_min = value; 1498 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1499 return count; 1500 } 1501 1502 if (!strcmp(name, "queue_map_max")) { 1503 len = num_arg(&user_buffer[i], 5, &value); 1504 if (len < 0) 1505 return len; 1506 1507 i += len; 1508 pkt_dev->queue_map_max = value; 1509 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1510 return count; 1511 } 1512 1513 if (!strcmp(name, "mpls")) { 1514 unsigned int n, cnt; 1515 1516 len = get_labels(&user_buffer[i], pkt_dev); 1517 if (len < 0) 1518 return len; 1519 i += len; 1520 cnt = sprintf(pg_result, "OK: mpls="); 1521 for (n = 0; n < pkt_dev->nr_labels; n++) 1522 cnt += sprintf(pg_result + cnt, 1523 "%08x%s", ntohl(pkt_dev->labels[n]), 1524 n == pkt_dev->nr_labels-1 ? "" : ","); 1525 1526 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1527 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1528 pkt_dev->svlan_id = 0xffff; 1529 1530 if (debug) 1531 pr_debug("VLAN/SVLAN auto turned off\n"); 1532 } 1533 return count; 1534 } 1535 1536 if (!strcmp(name, "vlan_id")) { 1537 len = num_arg(&user_buffer[i], 4, &value); 1538 if (len < 0) 1539 return len; 1540 1541 i += len; 1542 if (value <= 4095) { 1543 pkt_dev->vlan_id = value; /* turn on VLAN */ 1544 1545 if (debug) 1546 pr_debug("VLAN turned on\n"); 1547 1548 if (debug && pkt_dev->nr_labels) 1549 pr_debug("MPLS auto turned off\n"); 1550 1551 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1552 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1553 } else { 1554 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1555 pkt_dev->svlan_id = 0xffff; 1556 1557 if (debug) 1558 pr_debug("VLAN/SVLAN turned off\n"); 1559 } 1560 return count; 1561 } 1562 1563 if (!strcmp(name, "vlan_p")) { 1564 len = num_arg(&user_buffer[i], 1, &value); 1565 if (len < 0) 1566 return len; 1567 1568 i += len; 1569 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1570 pkt_dev->vlan_p = value; 1571 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1572 } else { 1573 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1574 } 1575 return count; 1576 } 1577 1578 if (!strcmp(name, "vlan_cfi")) { 1579 len = num_arg(&user_buffer[i], 1, &value); 1580 if (len < 0) 1581 return len; 1582 1583 i += len; 1584 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1585 pkt_dev->vlan_cfi = value; 1586 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1587 } else { 1588 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1589 } 1590 return count; 1591 } 1592 1593 if (!strcmp(name, "svlan_id")) { 1594 len = num_arg(&user_buffer[i], 4, &value); 1595 if (len < 0) 1596 return len; 1597 1598 i += len; 1599 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1600 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1601 1602 if (debug) 1603 pr_debug("SVLAN turned on\n"); 1604 1605 if (debug && pkt_dev->nr_labels) 1606 pr_debug("MPLS auto turned off\n"); 1607 1608 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1609 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1610 } else { 1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1612 pkt_dev->svlan_id = 0xffff; 1613 1614 if (debug) 1615 pr_debug("VLAN/SVLAN turned off\n"); 1616 } 1617 return count; 1618 } 1619 1620 if (!strcmp(name, "svlan_p")) { 1621 len = num_arg(&user_buffer[i], 1, &value); 1622 if (len < 0) 1623 return len; 1624 1625 i += len; 1626 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1627 pkt_dev->svlan_p = value; 1628 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1629 } else { 1630 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1631 } 1632 return count; 1633 } 1634 1635 if (!strcmp(name, "svlan_cfi")) { 1636 len = num_arg(&user_buffer[i], 1, &value); 1637 if (len < 0) 1638 return len; 1639 1640 i += len; 1641 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1642 pkt_dev->svlan_cfi = value; 1643 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1644 } else { 1645 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1646 } 1647 return count; 1648 } 1649 1650 if (!strcmp(name, "tos")) { 1651 __u32 tmp_value = 0; 1652 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1653 if (len < 0) 1654 return len; 1655 1656 i += len; 1657 if (len == 2) { 1658 pkt_dev->tos = tmp_value; 1659 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1660 } else { 1661 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1662 } 1663 return count; 1664 } 1665 1666 if (!strcmp(name, "traffic_class")) { 1667 __u32 tmp_value = 0; 1668 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1669 if (len < 0) 1670 return len; 1671 1672 i += len; 1673 if (len == 2) { 1674 pkt_dev->traffic_class = tmp_value; 1675 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1676 } else { 1677 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1678 } 1679 return count; 1680 } 1681 1682 if (!strcmp(name, "skb_priority")) { 1683 len = num_arg(&user_buffer[i], 9, &value); 1684 if (len < 0) 1685 return len; 1686 1687 i += len; 1688 pkt_dev->skb_priority = value; 1689 sprintf(pg_result, "OK: skb_priority=%i", 1690 pkt_dev->skb_priority); 1691 return count; 1692 } 1693 1694 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1695 return -EINVAL; 1696 } 1697 1698 static int pktgen_if_open(struct inode *inode, struct file *file) 1699 { 1700 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1701 } 1702 1703 static const struct file_operations pktgen_if_fops = { 1704 .owner = THIS_MODULE, 1705 .open = pktgen_if_open, 1706 .read = seq_read, 1707 .llseek = seq_lseek, 1708 .write = pktgen_if_write, 1709 .release = single_release, 1710 }; 1711 1712 static int pktgen_thread_show(struct seq_file *seq, void *v) 1713 { 1714 struct pktgen_thread *t = seq->private; 1715 const struct pktgen_dev *pkt_dev; 1716 1717 BUG_ON(!t); 1718 1719 seq_printf(seq, "Running: "); 1720 1721 if_lock(t); 1722 list_for_each_entry(pkt_dev, &t->if_list, list) 1723 if (pkt_dev->running) 1724 seq_printf(seq, "%s ", pkt_dev->odevname); 1725 1726 seq_printf(seq, "\nStopped: "); 1727 1728 list_for_each_entry(pkt_dev, &t->if_list, list) 1729 if (!pkt_dev->running) 1730 seq_printf(seq, "%s ", pkt_dev->odevname); 1731 1732 if (t->result[0]) 1733 seq_printf(seq, "\nResult: %s\n", t->result); 1734 else 1735 seq_printf(seq, "\nResult: NA\n"); 1736 1737 if_unlock(t); 1738 1739 return 0; 1740 } 1741 1742 static ssize_t pktgen_thread_write(struct file *file, 1743 const char __user * user_buffer, 1744 size_t count, loff_t * offset) 1745 { 1746 struct seq_file *seq = file->private_data; 1747 struct pktgen_thread *t = seq->private; 1748 int i, max, len, ret; 1749 char name[40]; 1750 char *pg_result; 1751 1752 if (count < 1) { 1753 // sprintf(pg_result, "Wrong command format"); 1754 return -EINVAL; 1755 } 1756 1757 max = count; 1758 len = count_trail_chars(user_buffer, max); 1759 if (len < 0) 1760 return len; 1761 1762 i = len; 1763 1764 /* Read variable name */ 1765 1766 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1767 if (len < 0) 1768 return len; 1769 1770 memset(name, 0, sizeof(name)); 1771 if (copy_from_user(name, &user_buffer[i], len)) 1772 return -EFAULT; 1773 i += len; 1774 1775 max = count - i; 1776 len = count_trail_chars(&user_buffer[i], max); 1777 if (len < 0) 1778 return len; 1779 1780 i += len; 1781 1782 if (debug) 1783 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1784 1785 if (!t) { 1786 pr_err("ERROR: No thread\n"); 1787 ret = -EINVAL; 1788 goto out; 1789 } 1790 1791 pg_result = &(t->result[0]); 1792 1793 if (!strcmp(name, "add_device")) { 1794 char f[32]; 1795 memset(f, 0, 32); 1796 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1797 if (len < 0) { 1798 ret = len; 1799 goto out; 1800 } 1801 if (copy_from_user(f, &user_buffer[i], len)) 1802 return -EFAULT; 1803 i += len; 1804 mutex_lock(&pktgen_thread_lock); 1805 ret = pktgen_add_device(t, f); 1806 mutex_unlock(&pktgen_thread_lock); 1807 if (!ret) { 1808 ret = count; 1809 sprintf(pg_result, "OK: add_device=%s", f); 1810 } else 1811 sprintf(pg_result, "ERROR: can not add device %s", f); 1812 goto out; 1813 } 1814 1815 if (!strcmp(name, "rem_device_all")) { 1816 mutex_lock(&pktgen_thread_lock); 1817 t->control |= T_REMDEVALL; 1818 mutex_unlock(&pktgen_thread_lock); 1819 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1820 ret = count; 1821 sprintf(pg_result, "OK: rem_device_all"); 1822 goto out; 1823 } 1824 1825 if (!strcmp(name, "max_before_softirq")) { 1826 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1827 ret = count; 1828 goto out; 1829 } 1830 1831 ret = -EINVAL; 1832 out: 1833 return ret; 1834 } 1835 1836 static int pktgen_thread_open(struct inode *inode, struct file *file) 1837 { 1838 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1839 } 1840 1841 static const struct file_operations pktgen_thread_fops = { 1842 .owner = THIS_MODULE, 1843 .open = pktgen_thread_open, 1844 .read = seq_read, 1845 .llseek = seq_lseek, 1846 .write = pktgen_thread_write, 1847 .release = single_release, 1848 }; 1849 1850 /* Think find or remove for NN */ 1851 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1852 const char *ifname, int remove) 1853 { 1854 struct pktgen_thread *t; 1855 struct pktgen_dev *pkt_dev = NULL; 1856 bool exact = (remove == FIND); 1857 1858 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1859 pkt_dev = pktgen_find_dev(t, ifname, exact); 1860 if (pkt_dev) { 1861 if (remove) { 1862 if_lock(t); 1863 pkt_dev->removal_mark = 1; 1864 t->control |= T_REMDEV; 1865 if_unlock(t); 1866 } 1867 break; 1868 } 1869 } 1870 return pkt_dev; 1871 } 1872 1873 /* 1874 * mark a device for removal 1875 */ 1876 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1877 { 1878 struct pktgen_dev *pkt_dev = NULL; 1879 const int max_tries = 10, msec_per_try = 125; 1880 int i = 0; 1881 1882 mutex_lock(&pktgen_thread_lock); 1883 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1884 1885 while (1) { 1886 1887 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1888 if (pkt_dev == NULL) 1889 break; /* success */ 1890 1891 mutex_unlock(&pktgen_thread_lock); 1892 pr_debug("%s: waiting for %s to disappear....\n", 1893 __func__, ifname); 1894 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1895 mutex_lock(&pktgen_thread_lock); 1896 1897 if (++i >= max_tries) { 1898 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1899 __func__, msec_per_try * i, ifname); 1900 break; 1901 } 1902 1903 } 1904 1905 mutex_unlock(&pktgen_thread_lock); 1906 } 1907 1908 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 1909 { 1910 struct pktgen_thread *t; 1911 1912 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1913 struct pktgen_dev *pkt_dev; 1914 1915 list_for_each_entry(pkt_dev, &t->if_list, list) { 1916 if (pkt_dev->odev != dev) 1917 continue; 1918 1919 proc_remove(pkt_dev->entry); 1920 1921 pkt_dev->entry = proc_create_data(dev->name, 0600, 1922 pn->proc_dir, 1923 &pktgen_if_fops, 1924 pkt_dev); 1925 if (!pkt_dev->entry) 1926 pr_err("can't move proc entry for '%s'\n", 1927 dev->name); 1928 break; 1929 } 1930 } 1931 } 1932 1933 static int pktgen_device_event(struct notifier_block *unused, 1934 unsigned long event, void *ptr) 1935 { 1936 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1937 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 1938 1939 if (pn->pktgen_exiting) 1940 return NOTIFY_DONE; 1941 1942 /* It is OK that we do not hold the group lock right now, 1943 * as we run under the RTNL lock. 1944 */ 1945 1946 switch (event) { 1947 case NETDEV_CHANGENAME: 1948 pktgen_change_name(pn, dev); 1949 break; 1950 1951 case NETDEV_UNREGISTER: 1952 pktgen_mark_device(pn, dev->name); 1953 break; 1954 } 1955 1956 return NOTIFY_DONE; 1957 } 1958 1959 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 1960 struct pktgen_dev *pkt_dev, 1961 const char *ifname) 1962 { 1963 char b[IFNAMSIZ+5]; 1964 int i; 1965 1966 for (i = 0; ifname[i] != '@'; i++) { 1967 if (i == IFNAMSIZ) 1968 break; 1969 1970 b[i] = ifname[i]; 1971 } 1972 b[i] = 0; 1973 1974 return dev_get_by_name(pn->net, b); 1975 } 1976 1977 1978 /* Associate pktgen_dev with a device. */ 1979 1980 static int pktgen_setup_dev(const struct pktgen_net *pn, 1981 struct pktgen_dev *pkt_dev, const char *ifname) 1982 { 1983 struct net_device *odev; 1984 int err; 1985 1986 /* Clean old setups */ 1987 if (pkt_dev->odev) { 1988 dev_put(pkt_dev->odev); 1989 pkt_dev->odev = NULL; 1990 } 1991 1992 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 1993 if (!odev) { 1994 pr_err("no such netdevice: \"%s\"\n", ifname); 1995 return -ENODEV; 1996 } 1997 1998 if (odev->type != ARPHRD_ETHER) { 1999 pr_err("not an ethernet device: \"%s\"\n", ifname); 2000 err = -EINVAL; 2001 } else if (!netif_running(odev)) { 2002 pr_err("device is down: \"%s\"\n", ifname); 2003 err = -ENETDOWN; 2004 } else { 2005 pkt_dev->odev = odev; 2006 return 0; 2007 } 2008 2009 dev_put(odev); 2010 return err; 2011 } 2012 2013 /* Read pkt_dev from the interface and set up internal pktgen_dev 2014 * structure to have the right information to create/send packets 2015 */ 2016 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2017 { 2018 int ntxq; 2019 2020 if (!pkt_dev->odev) { 2021 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2022 sprintf(pkt_dev->result, 2023 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2024 return; 2025 } 2026 2027 /* make sure that we don't pick a non-existing transmit queue */ 2028 ntxq = pkt_dev->odev->real_num_tx_queues; 2029 2030 if (ntxq <= pkt_dev->queue_map_min) { 2031 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2032 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2033 pkt_dev->odevname); 2034 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2035 } 2036 if (pkt_dev->queue_map_max >= ntxq) { 2037 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2038 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2039 pkt_dev->odevname); 2040 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2041 } 2042 2043 /* Default to the interface's mac if not explicitly set. */ 2044 2045 if (is_zero_ether_addr(pkt_dev->src_mac)) 2046 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2047 2048 /* Set up Dest MAC */ 2049 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2050 2051 if (pkt_dev->flags & F_IPV6) { 2052 int i, set = 0, err = 1; 2053 struct inet6_dev *idev; 2054 2055 if (pkt_dev->min_pkt_size == 0) { 2056 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2057 + sizeof(struct udphdr) 2058 + sizeof(struct pktgen_hdr) 2059 + pkt_dev->pkt_overhead; 2060 } 2061 2062 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2063 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2064 set = 1; 2065 break; 2066 } 2067 2068 if (!set) { 2069 2070 /* 2071 * Use linklevel address if unconfigured. 2072 * 2073 * use ipv6_get_lladdr if/when it's get exported 2074 */ 2075 2076 rcu_read_lock(); 2077 idev = __in6_dev_get(pkt_dev->odev); 2078 if (idev) { 2079 struct inet6_ifaddr *ifp; 2080 2081 read_lock_bh(&idev->lock); 2082 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2083 if ((ifp->scope & IFA_LINK) && 2084 !(ifp->flags & IFA_F_TENTATIVE)) { 2085 pkt_dev->cur_in6_saddr = ifp->addr; 2086 err = 0; 2087 break; 2088 } 2089 } 2090 read_unlock_bh(&idev->lock); 2091 } 2092 rcu_read_unlock(); 2093 if (err) 2094 pr_err("ERROR: IPv6 link address not available\n"); 2095 } 2096 } else { 2097 if (pkt_dev->min_pkt_size == 0) { 2098 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2099 + sizeof(struct udphdr) 2100 + sizeof(struct pktgen_hdr) 2101 + pkt_dev->pkt_overhead; 2102 } 2103 2104 pkt_dev->saddr_min = 0; 2105 pkt_dev->saddr_max = 0; 2106 if (strlen(pkt_dev->src_min) == 0) { 2107 2108 struct in_device *in_dev; 2109 2110 rcu_read_lock(); 2111 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2112 if (in_dev) { 2113 if (in_dev->ifa_list) { 2114 pkt_dev->saddr_min = 2115 in_dev->ifa_list->ifa_address; 2116 pkt_dev->saddr_max = pkt_dev->saddr_min; 2117 } 2118 } 2119 rcu_read_unlock(); 2120 } else { 2121 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2122 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2123 } 2124 2125 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2126 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2127 } 2128 /* Initialize current values. */ 2129 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2130 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2131 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2132 2133 pkt_dev->cur_dst_mac_offset = 0; 2134 pkt_dev->cur_src_mac_offset = 0; 2135 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2136 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2137 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2138 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2139 pkt_dev->nflows = 0; 2140 } 2141 2142 2143 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2144 { 2145 ktime_t start_time, end_time; 2146 s64 remaining; 2147 struct hrtimer_sleeper t; 2148 2149 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2150 hrtimer_set_expires(&t.timer, spin_until); 2151 2152 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2153 if (remaining <= 0) { 2154 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2155 return; 2156 } 2157 2158 start_time = ktime_get(); 2159 if (remaining < 100000) { 2160 /* for small delays (<100us), just loop until limit is reached */ 2161 do { 2162 end_time = ktime_get(); 2163 } while (ktime_compare(end_time, spin_until) < 0); 2164 } else { 2165 /* see do_nanosleep */ 2166 hrtimer_init_sleeper(&t, current); 2167 do { 2168 set_current_state(TASK_INTERRUPTIBLE); 2169 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2170 if (!hrtimer_active(&t.timer)) 2171 t.task = NULL; 2172 2173 if (likely(t.task)) 2174 schedule(); 2175 2176 hrtimer_cancel(&t.timer); 2177 } while (t.task && pkt_dev->running && !signal_pending(current)); 2178 __set_current_state(TASK_RUNNING); 2179 end_time = ktime_get(); 2180 } 2181 2182 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2183 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2184 } 2185 2186 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2187 { 2188 pkt_dev->pkt_overhead = 0; 2189 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2190 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2191 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2192 } 2193 2194 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2195 { 2196 return !!(pkt_dev->flows[flow].flags & F_INIT); 2197 } 2198 2199 static inline int f_pick(struct pktgen_dev *pkt_dev) 2200 { 2201 int flow = pkt_dev->curfl; 2202 2203 if (pkt_dev->flags & F_FLOW_SEQ) { 2204 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2205 /* reset time */ 2206 pkt_dev->flows[flow].count = 0; 2207 pkt_dev->flows[flow].flags = 0; 2208 pkt_dev->curfl += 1; 2209 if (pkt_dev->curfl >= pkt_dev->cflows) 2210 pkt_dev->curfl = 0; /*reset */ 2211 } 2212 } else { 2213 flow = prandom_u32() % pkt_dev->cflows; 2214 pkt_dev->curfl = flow; 2215 2216 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2217 pkt_dev->flows[flow].count = 0; 2218 pkt_dev->flows[flow].flags = 0; 2219 } 2220 } 2221 2222 return pkt_dev->curfl; 2223 } 2224 2225 2226 #ifdef CONFIG_XFRM 2227 /* If there was already an IPSEC SA, we keep it as is, else 2228 * we go look for it ... 2229 */ 2230 #define DUMMY_MARK 0 2231 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2232 { 2233 struct xfrm_state *x = pkt_dev->flows[flow].x; 2234 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2235 if (!x) { 2236 /*slow path: we dont already have xfrm_state*/ 2237 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2238 (xfrm_address_t *)&pkt_dev->cur_daddr, 2239 (xfrm_address_t *)&pkt_dev->cur_saddr, 2240 AF_INET, 2241 pkt_dev->ipsmode, 2242 pkt_dev->ipsproto, 0); 2243 if (x) { 2244 pkt_dev->flows[flow].x = x; 2245 set_pkt_overhead(pkt_dev); 2246 pkt_dev->pkt_overhead += x->props.header_len; 2247 } 2248 2249 } 2250 } 2251 #endif 2252 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2253 { 2254 2255 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2256 pkt_dev->cur_queue_map = smp_processor_id(); 2257 2258 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2259 __u16 t; 2260 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2261 t = prandom_u32() % 2262 (pkt_dev->queue_map_max - 2263 pkt_dev->queue_map_min + 1) 2264 + pkt_dev->queue_map_min; 2265 } else { 2266 t = pkt_dev->cur_queue_map + 1; 2267 if (t > pkt_dev->queue_map_max) 2268 t = pkt_dev->queue_map_min; 2269 } 2270 pkt_dev->cur_queue_map = t; 2271 } 2272 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2273 } 2274 2275 /* Increment/randomize headers according to flags and current values 2276 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2277 */ 2278 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2279 { 2280 __u32 imn; 2281 __u32 imx; 2282 int flow = 0; 2283 2284 if (pkt_dev->cflows) 2285 flow = f_pick(pkt_dev); 2286 2287 /* Deal with source MAC */ 2288 if (pkt_dev->src_mac_count > 1) { 2289 __u32 mc; 2290 __u32 tmp; 2291 2292 if (pkt_dev->flags & F_MACSRC_RND) 2293 mc = prandom_u32() % pkt_dev->src_mac_count; 2294 else { 2295 mc = pkt_dev->cur_src_mac_offset++; 2296 if (pkt_dev->cur_src_mac_offset >= 2297 pkt_dev->src_mac_count) 2298 pkt_dev->cur_src_mac_offset = 0; 2299 } 2300 2301 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2302 pkt_dev->hh[11] = tmp; 2303 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2304 pkt_dev->hh[10] = tmp; 2305 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2306 pkt_dev->hh[9] = tmp; 2307 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2308 pkt_dev->hh[8] = tmp; 2309 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2310 pkt_dev->hh[7] = tmp; 2311 } 2312 2313 /* Deal with Destination MAC */ 2314 if (pkt_dev->dst_mac_count > 1) { 2315 __u32 mc; 2316 __u32 tmp; 2317 2318 if (pkt_dev->flags & F_MACDST_RND) 2319 mc = prandom_u32() % pkt_dev->dst_mac_count; 2320 2321 else { 2322 mc = pkt_dev->cur_dst_mac_offset++; 2323 if (pkt_dev->cur_dst_mac_offset >= 2324 pkt_dev->dst_mac_count) { 2325 pkt_dev->cur_dst_mac_offset = 0; 2326 } 2327 } 2328 2329 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2330 pkt_dev->hh[5] = tmp; 2331 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2332 pkt_dev->hh[4] = tmp; 2333 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2334 pkt_dev->hh[3] = tmp; 2335 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2336 pkt_dev->hh[2] = tmp; 2337 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2338 pkt_dev->hh[1] = tmp; 2339 } 2340 2341 if (pkt_dev->flags & F_MPLS_RND) { 2342 unsigned int i; 2343 for (i = 0; i < pkt_dev->nr_labels; i++) 2344 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2345 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2346 ((__force __be32)prandom_u32() & 2347 htonl(0x000fffff)); 2348 } 2349 2350 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2351 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2352 } 2353 2354 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2355 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2356 } 2357 2358 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2359 if (pkt_dev->flags & F_UDPSRC_RND) 2360 pkt_dev->cur_udp_src = prandom_u32() % 2361 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2362 + pkt_dev->udp_src_min; 2363 2364 else { 2365 pkt_dev->cur_udp_src++; 2366 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2367 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2368 } 2369 } 2370 2371 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2372 if (pkt_dev->flags & F_UDPDST_RND) { 2373 pkt_dev->cur_udp_dst = prandom_u32() % 2374 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2375 + pkt_dev->udp_dst_min; 2376 } else { 2377 pkt_dev->cur_udp_dst++; 2378 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2379 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2380 } 2381 } 2382 2383 if (!(pkt_dev->flags & F_IPV6)) { 2384 2385 imn = ntohl(pkt_dev->saddr_min); 2386 imx = ntohl(pkt_dev->saddr_max); 2387 if (imn < imx) { 2388 __u32 t; 2389 if (pkt_dev->flags & F_IPSRC_RND) 2390 t = prandom_u32() % (imx - imn) + imn; 2391 else { 2392 t = ntohl(pkt_dev->cur_saddr); 2393 t++; 2394 if (t > imx) 2395 t = imn; 2396 2397 } 2398 pkt_dev->cur_saddr = htonl(t); 2399 } 2400 2401 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2402 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2403 } else { 2404 imn = ntohl(pkt_dev->daddr_min); 2405 imx = ntohl(pkt_dev->daddr_max); 2406 if (imn < imx) { 2407 __u32 t; 2408 __be32 s; 2409 if (pkt_dev->flags & F_IPDST_RND) { 2410 2411 do { 2412 t = prandom_u32() % 2413 (imx - imn) + imn; 2414 s = htonl(t); 2415 } while (ipv4_is_loopback(s) || 2416 ipv4_is_multicast(s) || 2417 ipv4_is_lbcast(s) || 2418 ipv4_is_zeronet(s) || 2419 ipv4_is_local_multicast(s)); 2420 pkt_dev->cur_daddr = s; 2421 } else { 2422 t = ntohl(pkt_dev->cur_daddr); 2423 t++; 2424 if (t > imx) { 2425 t = imn; 2426 } 2427 pkt_dev->cur_daddr = htonl(t); 2428 } 2429 } 2430 if (pkt_dev->cflows) { 2431 pkt_dev->flows[flow].flags |= F_INIT; 2432 pkt_dev->flows[flow].cur_daddr = 2433 pkt_dev->cur_daddr; 2434 #ifdef CONFIG_XFRM 2435 if (pkt_dev->flags & F_IPSEC_ON) 2436 get_ipsec_sa(pkt_dev, flow); 2437 #endif 2438 pkt_dev->nflows++; 2439 } 2440 } 2441 } else { /* IPV6 * */ 2442 2443 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2444 int i; 2445 2446 /* Only random destinations yet */ 2447 2448 for (i = 0; i < 4; i++) { 2449 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2450 (((__force __be32)prandom_u32() | 2451 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2452 pkt_dev->max_in6_daddr.s6_addr32[i]); 2453 } 2454 } 2455 } 2456 2457 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2458 __u32 t; 2459 if (pkt_dev->flags & F_TXSIZE_RND) { 2460 t = prandom_u32() % 2461 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2462 + pkt_dev->min_pkt_size; 2463 } else { 2464 t = pkt_dev->cur_pkt_size + 1; 2465 if (t > pkt_dev->max_pkt_size) 2466 t = pkt_dev->min_pkt_size; 2467 } 2468 pkt_dev->cur_pkt_size = t; 2469 } 2470 2471 set_cur_queue_map(pkt_dev); 2472 2473 pkt_dev->flows[flow].count++; 2474 } 2475 2476 2477 #ifdef CONFIG_XFRM 2478 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2479 { 2480 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2481 int err = 0; 2482 2483 if (!x) 2484 return 0; 2485 /* XXX: we dont support tunnel mode for now until 2486 * we resolve the dst issue */ 2487 if (x->props.mode != XFRM_MODE_TRANSPORT) 2488 return 0; 2489 2490 spin_lock(&x->lock); 2491 2492 err = x->outer_mode->output(x, skb); 2493 if (err) 2494 goto error; 2495 err = x->type->output(x, skb); 2496 if (err) 2497 goto error; 2498 2499 x->curlft.bytes += skb->len; 2500 x->curlft.packets++; 2501 error: 2502 spin_unlock(&x->lock); 2503 return err; 2504 } 2505 2506 static void free_SAs(struct pktgen_dev *pkt_dev) 2507 { 2508 if (pkt_dev->cflows) { 2509 /* let go of the SAs if we have them */ 2510 int i; 2511 for (i = 0; i < pkt_dev->cflows; i++) { 2512 struct xfrm_state *x = pkt_dev->flows[i].x; 2513 if (x) { 2514 xfrm_state_put(x); 2515 pkt_dev->flows[i].x = NULL; 2516 } 2517 } 2518 } 2519 } 2520 2521 static int process_ipsec(struct pktgen_dev *pkt_dev, 2522 struct sk_buff *skb, __be16 protocol) 2523 { 2524 if (pkt_dev->flags & F_IPSEC_ON) { 2525 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2526 int nhead = 0; 2527 if (x) { 2528 int ret; 2529 __u8 *eth; 2530 struct iphdr *iph; 2531 2532 nhead = x->props.header_len - skb_headroom(skb); 2533 if (nhead > 0) { 2534 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2535 if (ret < 0) { 2536 pr_err("Error expanding ipsec packet %d\n", 2537 ret); 2538 goto err; 2539 } 2540 } 2541 2542 /* ipsec is not expecting ll header */ 2543 skb_pull(skb, ETH_HLEN); 2544 ret = pktgen_output_ipsec(skb, pkt_dev); 2545 if (ret) { 2546 pr_err("Error creating ipsec packet %d\n", ret); 2547 goto err; 2548 } 2549 /* restore ll */ 2550 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2551 memcpy(eth, pkt_dev->hh, 12); 2552 *(u16 *) ð[12] = protocol; 2553 2554 /* Update IPv4 header len as well as checksum value */ 2555 iph = ip_hdr(skb); 2556 iph->tot_len = htons(skb->len - ETH_HLEN); 2557 ip_send_check(iph); 2558 } 2559 } 2560 return 1; 2561 err: 2562 kfree_skb(skb); 2563 return 0; 2564 } 2565 #endif 2566 2567 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2568 { 2569 unsigned int i; 2570 for (i = 0; i < pkt_dev->nr_labels; i++) 2571 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2572 2573 mpls--; 2574 *mpls |= MPLS_STACK_BOTTOM; 2575 } 2576 2577 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2578 unsigned int prio) 2579 { 2580 return htons(id | (cfi << 12) | (prio << 13)); 2581 } 2582 2583 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2584 int datalen) 2585 { 2586 struct timeval timestamp; 2587 struct pktgen_hdr *pgh; 2588 2589 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2590 datalen -= sizeof(*pgh); 2591 2592 if (pkt_dev->nfrags <= 0) { 2593 memset(skb_put(skb, datalen), 0, datalen); 2594 } else { 2595 int frags = pkt_dev->nfrags; 2596 int i, len; 2597 int frag_len; 2598 2599 2600 if (frags > MAX_SKB_FRAGS) 2601 frags = MAX_SKB_FRAGS; 2602 len = datalen - frags * PAGE_SIZE; 2603 if (len > 0) { 2604 memset(skb_put(skb, len), 0, len); 2605 datalen = frags * PAGE_SIZE; 2606 } 2607 2608 i = 0; 2609 frag_len = (datalen/frags) < PAGE_SIZE ? 2610 (datalen/frags) : PAGE_SIZE; 2611 while (datalen > 0) { 2612 if (unlikely(!pkt_dev->page)) { 2613 int node = numa_node_id(); 2614 2615 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2616 node = pkt_dev->node; 2617 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2618 if (!pkt_dev->page) 2619 break; 2620 } 2621 get_page(pkt_dev->page); 2622 skb_frag_set_page(skb, i, pkt_dev->page); 2623 skb_shinfo(skb)->frags[i].page_offset = 0; 2624 /*last fragment, fill rest of data*/ 2625 if (i == (frags - 1)) 2626 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2627 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2628 else 2629 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2630 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2631 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2632 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2633 i++; 2634 skb_shinfo(skb)->nr_frags = i; 2635 } 2636 } 2637 2638 /* Stamp the time, and sequence number, 2639 * convert them to network byte order 2640 */ 2641 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2642 pgh->seq_num = htonl(pkt_dev->seq_num); 2643 2644 do_gettimeofday(×tamp); 2645 pgh->tv_sec = htonl(timestamp.tv_sec); 2646 pgh->tv_usec = htonl(timestamp.tv_usec); 2647 } 2648 2649 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2650 struct pktgen_dev *pkt_dev, 2651 unsigned int extralen) 2652 { 2653 struct sk_buff *skb = NULL; 2654 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2655 pkt_dev->pkt_overhead; 2656 2657 if (pkt_dev->flags & F_NODE) { 2658 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2659 2660 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2661 if (likely(skb)) { 2662 skb_reserve(skb, NET_SKB_PAD); 2663 skb->dev = dev; 2664 } 2665 } else { 2666 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2667 } 2668 2669 return skb; 2670 } 2671 2672 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2673 struct pktgen_dev *pkt_dev) 2674 { 2675 struct sk_buff *skb = NULL; 2676 __u8 *eth; 2677 struct udphdr *udph; 2678 int datalen, iplen; 2679 struct iphdr *iph; 2680 __be16 protocol = htons(ETH_P_IP); 2681 __be32 *mpls; 2682 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2683 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2684 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2685 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2686 u16 queue_map; 2687 2688 if (pkt_dev->nr_labels) 2689 protocol = htons(ETH_P_MPLS_UC); 2690 2691 if (pkt_dev->vlan_id != 0xffff) 2692 protocol = htons(ETH_P_8021Q); 2693 2694 /* Update any of the values, used when we're incrementing various 2695 * fields. 2696 */ 2697 mod_cur_headers(pkt_dev); 2698 queue_map = pkt_dev->cur_queue_map; 2699 2700 datalen = (odev->hard_header_len + 16) & ~0xf; 2701 2702 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2703 if (!skb) { 2704 sprintf(pkt_dev->result, "No memory"); 2705 return NULL; 2706 } 2707 2708 prefetchw(skb->data); 2709 skb_reserve(skb, datalen); 2710 2711 /* Reserve for ethernet and IP header */ 2712 eth = (__u8 *) skb_push(skb, 14); 2713 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2714 if (pkt_dev->nr_labels) 2715 mpls_push(mpls, pkt_dev); 2716 2717 if (pkt_dev->vlan_id != 0xffff) { 2718 if (pkt_dev->svlan_id != 0xffff) { 2719 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2720 *svlan_tci = build_tci(pkt_dev->svlan_id, 2721 pkt_dev->svlan_cfi, 2722 pkt_dev->svlan_p); 2723 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2724 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2725 } 2726 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2727 *vlan_tci = build_tci(pkt_dev->vlan_id, 2728 pkt_dev->vlan_cfi, 2729 pkt_dev->vlan_p); 2730 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2731 *vlan_encapsulated_proto = htons(ETH_P_IP); 2732 } 2733 2734 skb_set_mac_header(skb, 0); 2735 skb_set_network_header(skb, skb->len); 2736 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2737 2738 skb_set_transport_header(skb, skb->len); 2739 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2740 skb_set_queue_mapping(skb, queue_map); 2741 skb->priority = pkt_dev->skb_priority; 2742 2743 memcpy(eth, pkt_dev->hh, 12); 2744 *(__be16 *) & eth[12] = protocol; 2745 2746 /* Eth + IPh + UDPh + mpls */ 2747 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2748 pkt_dev->pkt_overhead; 2749 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2750 datalen = sizeof(struct pktgen_hdr); 2751 2752 udph->source = htons(pkt_dev->cur_udp_src); 2753 udph->dest = htons(pkt_dev->cur_udp_dst); 2754 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2755 udph->check = 0; 2756 2757 iph->ihl = 5; 2758 iph->version = 4; 2759 iph->ttl = 32; 2760 iph->tos = pkt_dev->tos; 2761 iph->protocol = IPPROTO_UDP; /* UDP */ 2762 iph->saddr = pkt_dev->cur_saddr; 2763 iph->daddr = pkt_dev->cur_daddr; 2764 iph->id = htons(pkt_dev->ip_id); 2765 pkt_dev->ip_id++; 2766 iph->frag_off = 0; 2767 iplen = 20 + 8 + datalen; 2768 iph->tot_len = htons(iplen); 2769 ip_send_check(iph); 2770 skb->protocol = protocol; 2771 skb->dev = odev; 2772 skb->pkt_type = PACKET_HOST; 2773 2774 if (!(pkt_dev->flags & F_UDPCSUM)) { 2775 skb->ip_summed = CHECKSUM_NONE; 2776 } else if (odev->features & NETIF_F_V4_CSUM) { 2777 skb->ip_summed = CHECKSUM_PARTIAL; 2778 skb->csum = 0; 2779 udp4_hwcsum(skb, udph->source, udph->dest); 2780 } else { 2781 __wsum csum = udp_csum(skb); 2782 2783 /* add protocol-dependent pseudo-header */ 2784 udph->check = csum_tcpudp_magic(udph->source, udph->dest, 2785 datalen + 8, IPPROTO_UDP, csum); 2786 2787 if (udph->check == 0) 2788 udph->check = CSUM_MANGLED_0; 2789 } 2790 2791 pktgen_finalize_skb(pkt_dev, skb, datalen); 2792 2793 #ifdef CONFIG_XFRM 2794 if (!process_ipsec(pkt_dev, skb, protocol)) 2795 return NULL; 2796 #endif 2797 2798 return skb; 2799 } 2800 2801 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2802 struct pktgen_dev *pkt_dev) 2803 { 2804 struct sk_buff *skb = NULL; 2805 __u8 *eth; 2806 struct udphdr *udph; 2807 int datalen, udplen; 2808 struct ipv6hdr *iph; 2809 __be16 protocol = htons(ETH_P_IPV6); 2810 __be32 *mpls; 2811 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2812 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2813 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2814 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2815 u16 queue_map; 2816 2817 if (pkt_dev->nr_labels) 2818 protocol = htons(ETH_P_MPLS_UC); 2819 2820 if (pkt_dev->vlan_id != 0xffff) 2821 protocol = htons(ETH_P_8021Q); 2822 2823 /* Update any of the values, used when we're incrementing various 2824 * fields. 2825 */ 2826 mod_cur_headers(pkt_dev); 2827 queue_map = pkt_dev->cur_queue_map; 2828 2829 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2830 if (!skb) { 2831 sprintf(pkt_dev->result, "No memory"); 2832 return NULL; 2833 } 2834 2835 prefetchw(skb->data); 2836 skb_reserve(skb, 16); 2837 2838 /* Reserve for ethernet and IP header */ 2839 eth = (__u8 *) skb_push(skb, 14); 2840 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2841 if (pkt_dev->nr_labels) 2842 mpls_push(mpls, pkt_dev); 2843 2844 if (pkt_dev->vlan_id != 0xffff) { 2845 if (pkt_dev->svlan_id != 0xffff) { 2846 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2847 *svlan_tci = build_tci(pkt_dev->svlan_id, 2848 pkt_dev->svlan_cfi, 2849 pkt_dev->svlan_p); 2850 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2851 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2852 } 2853 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2854 *vlan_tci = build_tci(pkt_dev->vlan_id, 2855 pkt_dev->vlan_cfi, 2856 pkt_dev->vlan_p); 2857 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2858 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2859 } 2860 2861 skb_set_mac_header(skb, 0); 2862 skb_set_network_header(skb, skb->len); 2863 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2864 2865 skb_set_transport_header(skb, skb->len); 2866 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2867 skb_set_queue_mapping(skb, queue_map); 2868 skb->priority = pkt_dev->skb_priority; 2869 2870 memcpy(eth, pkt_dev->hh, 12); 2871 *(__be16 *) ð[12] = protocol; 2872 2873 /* Eth + IPh + UDPh + mpls */ 2874 datalen = pkt_dev->cur_pkt_size - 14 - 2875 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2876 pkt_dev->pkt_overhead; 2877 2878 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2879 datalen = sizeof(struct pktgen_hdr); 2880 net_info_ratelimited("increased datalen to %d\n", datalen); 2881 } 2882 2883 udplen = datalen + sizeof(struct udphdr); 2884 udph->source = htons(pkt_dev->cur_udp_src); 2885 udph->dest = htons(pkt_dev->cur_udp_dst); 2886 udph->len = htons(udplen); 2887 udph->check = 0; 2888 2889 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2890 2891 if (pkt_dev->traffic_class) { 2892 /* Version + traffic class + flow (0) */ 2893 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2894 } 2895 2896 iph->hop_limit = 32; 2897 2898 iph->payload_len = htons(udplen); 2899 iph->nexthdr = IPPROTO_UDP; 2900 2901 iph->daddr = pkt_dev->cur_in6_daddr; 2902 iph->saddr = pkt_dev->cur_in6_saddr; 2903 2904 skb->protocol = protocol; 2905 skb->dev = odev; 2906 skb->pkt_type = PACKET_HOST; 2907 2908 if (!(pkt_dev->flags & F_UDPCSUM)) { 2909 skb->ip_summed = CHECKSUM_NONE; 2910 } else if (odev->features & NETIF_F_V6_CSUM) { 2911 skb->ip_summed = CHECKSUM_PARTIAL; 2912 skb->csum_start = skb_transport_header(skb) - skb->head; 2913 skb->csum_offset = offsetof(struct udphdr, check); 2914 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 2915 } else { 2916 __wsum csum = udp_csum(skb); 2917 2918 /* add protocol-dependent pseudo-header */ 2919 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 2920 2921 if (udph->check == 0) 2922 udph->check = CSUM_MANGLED_0; 2923 } 2924 2925 pktgen_finalize_skb(pkt_dev, skb, datalen); 2926 2927 return skb; 2928 } 2929 2930 static struct sk_buff *fill_packet(struct net_device *odev, 2931 struct pktgen_dev *pkt_dev) 2932 { 2933 if (pkt_dev->flags & F_IPV6) 2934 return fill_packet_ipv6(odev, pkt_dev); 2935 else 2936 return fill_packet_ipv4(odev, pkt_dev); 2937 } 2938 2939 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2940 { 2941 pkt_dev->seq_num = 1; 2942 pkt_dev->idle_acc = 0; 2943 pkt_dev->sofar = 0; 2944 pkt_dev->tx_bytes = 0; 2945 pkt_dev->errors = 0; 2946 } 2947 2948 /* Set up structure for sending pkts, clear counters */ 2949 2950 static void pktgen_run(struct pktgen_thread *t) 2951 { 2952 struct pktgen_dev *pkt_dev; 2953 int started = 0; 2954 2955 func_enter(); 2956 2957 if_lock(t); 2958 list_for_each_entry(pkt_dev, &t->if_list, list) { 2959 2960 /* 2961 * setup odev and create initial packet. 2962 */ 2963 pktgen_setup_inject(pkt_dev); 2964 2965 if (pkt_dev->odev) { 2966 pktgen_clear_counters(pkt_dev); 2967 pkt_dev->running = 1; /* Cranke yeself! */ 2968 pkt_dev->skb = NULL; 2969 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 2970 2971 set_pkt_overhead(pkt_dev); 2972 2973 strcpy(pkt_dev->result, "Starting"); 2974 started++; 2975 } else 2976 strcpy(pkt_dev->result, "Error starting"); 2977 } 2978 if_unlock(t); 2979 if (started) 2980 t->control &= ~(T_STOP); 2981 } 2982 2983 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 2984 { 2985 struct pktgen_thread *t; 2986 2987 func_enter(); 2988 2989 mutex_lock(&pktgen_thread_lock); 2990 2991 list_for_each_entry(t, &pn->pktgen_threads, th_list) 2992 t->control |= T_STOP; 2993 2994 mutex_unlock(&pktgen_thread_lock); 2995 } 2996 2997 static int thread_is_running(const struct pktgen_thread *t) 2998 { 2999 const struct pktgen_dev *pkt_dev; 3000 3001 list_for_each_entry(pkt_dev, &t->if_list, list) 3002 if (pkt_dev->running) 3003 return 1; 3004 return 0; 3005 } 3006 3007 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3008 { 3009 if_lock(t); 3010 3011 while (thread_is_running(t)) { 3012 3013 if_unlock(t); 3014 3015 msleep_interruptible(100); 3016 3017 if (signal_pending(current)) 3018 goto signal; 3019 if_lock(t); 3020 } 3021 if_unlock(t); 3022 return 1; 3023 signal: 3024 return 0; 3025 } 3026 3027 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3028 { 3029 struct pktgen_thread *t; 3030 int sig = 1; 3031 3032 mutex_lock(&pktgen_thread_lock); 3033 3034 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3035 sig = pktgen_wait_thread_run(t); 3036 if (sig == 0) 3037 break; 3038 } 3039 3040 if (sig == 0) 3041 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3042 t->control |= (T_STOP); 3043 3044 mutex_unlock(&pktgen_thread_lock); 3045 return sig; 3046 } 3047 3048 static void pktgen_run_all_threads(struct pktgen_net *pn) 3049 { 3050 struct pktgen_thread *t; 3051 3052 func_enter(); 3053 3054 mutex_lock(&pktgen_thread_lock); 3055 3056 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3057 t->control |= (T_RUN); 3058 3059 mutex_unlock(&pktgen_thread_lock); 3060 3061 /* Propagate thread->control */ 3062 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3063 3064 pktgen_wait_all_threads_run(pn); 3065 } 3066 3067 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3068 { 3069 struct pktgen_thread *t; 3070 3071 func_enter(); 3072 3073 mutex_lock(&pktgen_thread_lock); 3074 3075 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3076 t->control |= (T_REMDEVALL); 3077 3078 mutex_unlock(&pktgen_thread_lock); 3079 3080 /* Propagate thread->control */ 3081 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3082 3083 pktgen_wait_all_threads_run(pn); 3084 } 3085 3086 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3087 { 3088 __u64 bps, mbps, pps; 3089 char *p = pkt_dev->result; 3090 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3091 pkt_dev->started_at); 3092 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3093 3094 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3095 (unsigned long long)ktime_to_us(elapsed), 3096 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3097 (unsigned long long)ktime_to_us(idle), 3098 (unsigned long long)pkt_dev->sofar, 3099 pkt_dev->cur_pkt_size, nr_frags); 3100 3101 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3102 ktime_to_ns(elapsed)); 3103 3104 bps = pps * 8 * pkt_dev->cur_pkt_size; 3105 3106 mbps = bps; 3107 do_div(mbps, 1000000); 3108 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3109 (unsigned long long)pps, 3110 (unsigned long long)mbps, 3111 (unsigned long long)bps, 3112 (unsigned long long)pkt_dev->errors); 3113 } 3114 3115 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3116 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3117 { 3118 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3119 3120 if (!pkt_dev->running) { 3121 pr_warning("interface: %s is already stopped\n", 3122 pkt_dev->odevname); 3123 return -EINVAL; 3124 } 3125 3126 kfree_skb(pkt_dev->skb); 3127 pkt_dev->skb = NULL; 3128 pkt_dev->stopped_at = ktime_get(); 3129 pkt_dev->running = 0; 3130 3131 show_results(pkt_dev, nr_frags); 3132 3133 return 0; 3134 } 3135 3136 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3137 { 3138 struct pktgen_dev *pkt_dev, *best = NULL; 3139 3140 if_lock(t); 3141 3142 list_for_each_entry(pkt_dev, &t->if_list, list) { 3143 if (!pkt_dev->running) 3144 continue; 3145 if (best == NULL) 3146 best = pkt_dev; 3147 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3148 best = pkt_dev; 3149 } 3150 if_unlock(t); 3151 return best; 3152 } 3153 3154 static void pktgen_stop(struct pktgen_thread *t) 3155 { 3156 struct pktgen_dev *pkt_dev; 3157 3158 func_enter(); 3159 3160 if_lock(t); 3161 3162 list_for_each_entry(pkt_dev, &t->if_list, list) { 3163 pktgen_stop_device(pkt_dev); 3164 } 3165 3166 if_unlock(t); 3167 } 3168 3169 /* 3170 * one of our devices needs to be removed - find it 3171 * and remove it 3172 */ 3173 static void pktgen_rem_one_if(struct pktgen_thread *t) 3174 { 3175 struct list_head *q, *n; 3176 struct pktgen_dev *cur; 3177 3178 func_enter(); 3179 3180 if_lock(t); 3181 3182 list_for_each_safe(q, n, &t->if_list) { 3183 cur = list_entry(q, struct pktgen_dev, list); 3184 3185 if (!cur->removal_mark) 3186 continue; 3187 3188 kfree_skb(cur->skb); 3189 cur->skb = NULL; 3190 3191 pktgen_remove_device(t, cur); 3192 3193 break; 3194 } 3195 3196 if_unlock(t); 3197 } 3198 3199 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3200 { 3201 struct list_head *q, *n; 3202 struct pktgen_dev *cur; 3203 3204 func_enter(); 3205 3206 /* Remove all devices, free mem */ 3207 3208 if_lock(t); 3209 3210 list_for_each_safe(q, n, &t->if_list) { 3211 cur = list_entry(q, struct pktgen_dev, list); 3212 3213 kfree_skb(cur->skb); 3214 cur->skb = NULL; 3215 3216 pktgen_remove_device(t, cur); 3217 } 3218 3219 if_unlock(t); 3220 } 3221 3222 static void pktgen_rem_thread(struct pktgen_thread *t) 3223 { 3224 /* Remove from the thread list */ 3225 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3226 } 3227 3228 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3229 { 3230 ktime_t idle_start = ktime_get(); 3231 schedule(); 3232 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3233 } 3234 3235 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3236 { 3237 ktime_t idle_start = ktime_get(); 3238 3239 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3240 if (signal_pending(current)) 3241 break; 3242 3243 if (need_resched()) 3244 pktgen_resched(pkt_dev); 3245 else 3246 cpu_relax(); 3247 } 3248 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3249 } 3250 3251 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3252 { 3253 struct net_device *odev = pkt_dev->odev; 3254 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3255 = odev->netdev_ops->ndo_start_xmit; 3256 struct netdev_queue *txq; 3257 u16 queue_map; 3258 int ret; 3259 3260 /* If device is offline, then don't send */ 3261 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3262 pktgen_stop_device(pkt_dev); 3263 return; 3264 } 3265 3266 /* This is max DELAY, this has special meaning of 3267 * "never transmit" 3268 */ 3269 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3270 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3271 return; 3272 } 3273 3274 /* If no skb or clone count exhausted then get new one */ 3275 if (!pkt_dev->skb || (pkt_dev->last_ok && 3276 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3277 /* build a new pkt */ 3278 kfree_skb(pkt_dev->skb); 3279 3280 pkt_dev->skb = fill_packet(odev, pkt_dev); 3281 if (pkt_dev->skb == NULL) { 3282 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3283 schedule(); 3284 pkt_dev->clone_count--; /* back out increment, OOM */ 3285 return; 3286 } 3287 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3288 pkt_dev->allocated_skbs++; 3289 pkt_dev->clone_count = 0; /* reset counter */ 3290 } 3291 3292 if (pkt_dev->delay && pkt_dev->last_ok) 3293 spin(pkt_dev, pkt_dev->next_tx); 3294 3295 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3296 txq = netdev_get_tx_queue(odev, queue_map); 3297 3298 __netif_tx_lock_bh(txq); 3299 3300 if (unlikely(netif_xmit_frozen_or_stopped(txq))) { 3301 ret = NETDEV_TX_BUSY; 3302 pkt_dev->last_ok = 0; 3303 goto unlock; 3304 } 3305 atomic_inc(&(pkt_dev->skb->users)); 3306 ret = (*xmit)(pkt_dev->skb, odev); 3307 3308 switch (ret) { 3309 case NETDEV_TX_OK: 3310 txq_trans_update(txq); 3311 pkt_dev->last_ok = 1; 3312 pkt_dev->sofar++; 3313 pkt_dev->seq_num++; 3314 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3315 break; 3316 case NET_XMIT_DROP: 3317 case NET_XMIT_CN: 3318 case NET_XMIT_POLICED: 3319 /* skb has been consumed */ 3320 pkt_dev->errors++; 3321 break; 3322 default: /* Drivers are not supposed to return other values! */ 3323 net_info_ratelimited("%s xmit error: %d\n", 3324 pkt_dev->odevname, ret); 3325 pkt_dev->errors++; 3326 /* fallthru */ 3327 case NETDEV_TX_LOCKED: 3328 case NETDEV_TX_BUSY: 3329 /* Retry it next time */ 3330 atomic_dec(&(pkt_dev->skb->users)); 3331 pkt_dev->last_ok = 0; 3332 } 3333 unlock: 3334 __netif_tx_unlock_bh(txq); 3335 3336 /* If pkt_dev->count is zero, then run forever */ 3337 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3338 pktgen_wait_for_skb(pkt_dev); 3339 3340 /* Done with this */ 3341 pktgen_stop_device(pkt_dev); 3342 } 3343 } 3344 3345 /* 3346 * Main loop of the thread goes here 3347 */ 3348 3349 static int pktgen_thread_worker(void *arg) 3350 { 3351 DEFINE_WAIT(wait); 3352 struct pktgen_thread *t = arg; 3353 struct pktgen_dev *pkt_dev = NULL; 3354 int cpu = t->cpu; 3355 3356 BUG_ON(smp_processor_id() != cpu); 3357 3358 init_waitqueue_head(&t->queue); 3359 complete(&t->start_done); 3360 3361 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3362 3363 set_current_state(TASK_INTERRUPTIBLE); 3364 3365 set_freezable(); 3366 3367 while (!kthread_should_stop()) { 3368 pkt_dev = next_to_run(t); 3369 3370 if (unlikely(!pkt_dev && t->control == 0)) { 3371 if (t->net->pktgen_exiting) 3372 break; 3373 wait_event_interruptible_timeout(t->queue, 3374 t->control != 0, 3375 HZ/10); 3376 try_to_freeze(); 3377 continue; 3378 } 3379 3380 __set_current_state(TASK_RUNNING); 3381 3382 if (likely(pkt_dev)) { 3383 pktgen_xmit(pkt_dev); 3384 3385 if (need_resched()) 3386 pktgen_resched(pkt_dev); 3387 else 3388 cpu_relax(); 3389 } 3390 3391 if (t->control & T_STOP) { 3392 pktgen_stop(t); 3393 t->control &= ~(T_STOP); 3394 } 3395 3396 if (t->control & T_RUN) { 3397 pktgen_run(t); 3398 t->control &= ~(T_RUN); 3399 } 3400 3401 if (t->control & T_REMDEVALL) { 3402 pktgen_rem_all_ifs(t); 3403 t->control &= ~(T_REMDEVALL); 3404 } 3405 3406 if (t->control & T_REMDEV) { 3407 pktgen_rem_one_if(t); 3408 t->control &= ~(T_REMDEV); 3409 } 3410 3411 try_to_freeze(); 3412 3413 set_current_state(TASK_INTERRUPTIBLE); 3414 } 3415 3416 pr_debug("%s stopping all device\n", t->tsk->comm); 3417 pktgen_stop(t); 3418 3419 pr_debug("%s removing all device\n", t->tsk->comm); 3420 pktgen_rem_all_ifs(t); 3421 3422 pr_debug("%s removing thread\n", t->tsk->comm); 3423 pktgen_rem_thread(t); 3424 3425 /* Wait for kthread_stop */ 3426 while (!kthread_should_stop()) { 3427 set_current_state(TASK_INTERRUPTIBLE); 3428 schedule(); 3429 } 3430 __set_current_state(TASK_RUNNING); 3431 3432 return 0; 3433 } 3434 3435 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3436 const char *ifname, bool exact) 3437 { 3438 struct pktgen_dev *p, *pkt_dev = NULL; 3439 size_t len = strlen(ifname); 3440 3441 if_lock(t); 3442 list_for_each_entry(p, &t->if_list, list) 3443 if (strncmp(p->odevname, ifname, len) == 0) { 3444 if (p->odevname[len]) { 3445 if (exact || p->odevname[len] != '@') 3446 continue; 3447 } 3448 pkt_dev = p; 3449 break; 3450 } 3451 3452 if_unlock(t); 3453 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3454 return pkt_dev; 3455 } 3456 3457 /* 3458 * Adds a dev at front of if_list. 3459 */ 3460 3461 static int add_dev_to_thread(struct pktgen_thread *t, 3462 struct pktgen_dev *pkt_dev) 3463 { 3464 int rv = 0; 3465 3466 if_lock(t); 3467 3468 if (pkt_dev->pg_thread) { 3469 pr_err("ERROR: already assigned to a thread\n"); 3470 rv = -EBUSY; 3471 goto out; 3472 } 3473 3474 list_add(&pkt_dev->list, &t->if_list); 3475 pkt_dev->pg_thread = t; 3476 pkt_dev->running = 0; 3477 3478 out: 3479 if_unlock(t); 3480 return rv; 3481 } 3482 3483 /* Called under thread lock */ 3484 3485 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3486 { 3487 struct pktgen_dev *pkt_dev; 3488 int err; 3489 int node = cpu_to_node(t->cpu); 3490 3491 /* We don't allow a device to be on several threads */ 3492 3493 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3494 if (pkt_dev) { 3495 pr_err("ERROR: interface already used\n"); 3496 return -EBUSY; 3497 } 3498 3499 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3500 if (!pkt_dev) 3501 return -ENOMEM; 3502 3503 strcpy(pkt_dev->odevname, ifname); 3504 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3505 node); 3506 if (pkt_dev->flows == NULL) { 3507 kfree(pkt_dev); 3508 return -ENOMEM; 3509 } 3510 3511 pkt_dev->removal_mark = 0; 3512 pkt_dev->nfrags = 0; 3513 pkt_dev->delay = pg_delay_d; 3514 pkt_dev->count = pg_count_d; 3515 pkt_dev->sofar = 0; 3516 pkt_dev->udp_src_min = 9; /* sink port */ 3517 pkt_dev->udp_src_max = 9; 3518 pkt_dev->udp_dst_min = 9; 3519 pkt_dev->udp_dst_max = 9; 3520 pkt_dev->vlan_p = 0; 3521 pkt_dev->vlan_cfi = 0; 3522 pkt_dev->vlan_id = 0xffff; 3523 pkt_dev->svlan_p = 0; 3524 pkt_dev->svlan_cfi = 0; 3525 pkt_dev->svlan_id = 0xffff; 3526 pkt_dev->node = -1; 3527 3528 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3529 if (err) 3530 goto out1; 3531 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3532 pkt_dev->clone_skb = pg_clone_skb_d; 3533 3534 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3535 &pktgen_if_fops, pkt_dev); 3536 if (!pkt_dev->entry) { 3537 pr_err("cannot create %s/%s procfs entry\n", 3538 PG_PROC_DIR, ifname); 3539 err = -EINVAL; 3540 goto out2; 3541 } 3542 #ifdef CONFIG_XFRM 3543 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3544 pkt_dev->ipsproto = IPPROTO_ESP; 3545 #endif 3546 3547 return add_dev_to_thread(t, pkt_dev); 3548 out2: 3549 dev_put(pkt_dev->odev); 3550 out1: 3551 #ifdef CONFIG_XFRM 3552 free_SAs(pkt_dev); 3553 #endif 3554 vfree(pkt_dev->flows); 3555 kfree(pkt_dev); 3556 return err; 3557 } 3558 3559 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3560 { 3561 struct pktgen_thread *t; 3562 struct proc_dir_entry *pe; 3563 struct task_struct *p; 3564 3565 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3566 cpu_to_node(cpu)); 3567 if (!t) { 3568 pr_err("ERROR: out of memory, can't create new thread\n"); 3569 return -ENOMEM; 3570 } 3571 3572 spin_lock_init(&t->if_lock); 3573 t->cpu = cpu; 3574 3575 INIT_LIST_HEAD(&t->if_list); 3576 3577 list_add_tail(&t->th_list, &pn->pktgen_threads); 3578 init_completion(&t->start_done); 3579 3580 p = kthread_create_on_node(pktgen_thread_worker, 3581 t, 3582 cpu_to_node(cpu), 3583 "kpktgend_%d", cpu); 3584 if (IS_ERR(p)) { 3585 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3586 list_del(&t->th_list); 3587 kfree(t); 3588 return PTR_ERR(p); 3589 } 3590 kthread_bind(p, cpu); 3591 t->tsk = p; 3592 3593 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3594 &pktgen_thread_fops, t); 3595 if (!pe) { 3596 pr_err("cannot create %s/%s procfs entry\n", 3597 PG_PROC_DIR, t->tsk->comm); 3598 kthread_stop(p); 3599 list_del(&t->th_list); 3600 kfree(t); 3601 return -EINVAL; 3602 } 3603 3604 t->net = pn; 3605 wake_up_process(p); 3606 wait_for_completion(&t->start_done); 3607 3608 return 0; 3609 } 3610 3611 /* 3612 * Removes a device from the thread if_list. 3613 */ 3614 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3615 struct pktgen_dev *pkt_dev) 3616 { 3617 struct list_head *q, *n; 3618 struct pktgen_dev *p; 3619 3620 list_for_each_safe(q, n, &t->if_list) { 3621 p = list_entry(q, struct pktgen_dev, list); 3622 if (p == pkt_dev) 3623 list_del(&p->list); 3624 } 3625 } 3626 3627 static int pktgen_remove_device(struct pktgen_thread *t, 3628 struct pktgen_dev *pkt_dev) 3629 { 3630 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3631 3632 if (pkt_dev->running) { 3633 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3634 pktgen_stop_device(pkt_dev); 3635 } 3636 3637 /* Dis-associate from the interface */ 3638 3639 if (pkt_dev->odev) { 3640 dev_put(pkt_dev->odev); 3641 pkt_dev->odev = NULL; 3642 } 3643 3644 /* And update the thread if_list */ 3645 3646 _rem_dev_from_if_list(t, pkt_dev); 3647 3648 if (pkt_dev->entry) 3649 proc_remove(pkt_dev->entry); 3650 3651 #ifdef CONFIG_XFRM 3652 free_SAs(pkt_dev); 3653 #endif 3654 vfree(pkt_dev->flows); 3655 if (pkt_dev->page) 3656 put_page(pkt_dev->page); 3657 kfree(pkt_dev); 3658 return 0; 3659 } 3660 3661 static int __net_init pg_net_init(struct net *net) 3662 { 3663 struct pktgen_net *pn = net_generic(net, pg_net_id); 3664 struct proc_dir_entry *pe; 3665 int cpu, ret = 0; 3666 3667 pn->net = net; 3668 INIT_LIST_HEAD(&pn->pktgen_threads); 3669 pn->pktgen_exiting = false; 3670 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3671 if (!pn->proc_dir) { 3672 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3673 return -ENODEV; 3674 } 3675 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3676 if (pe == NULL) { 3677 pr_err("cannot create %s procfs entry\n", PGCTRL); 3678 ret = -EINVAL; 3679 goto remove; 3680 } 3681 3682 for_each_online_cpu(cpu) { 3683 int err; 3684 3685 err = pktgen_create_thread(cpu, pn); 3686 if (err) 3687 pr_warn("Cannot create thread for cpu %d (%d)\n", 3688 cpu, err); 3689 } 3690 3691 if (list_empty(&pn->pktgen_threads)) { 3692 pr_err("Initialization failed for all threads\n"); 3693 ret = -ENODEV; 3694 goto remove_entry; 3695 } 3696 3697 return 0; 3698 3699 remove_entry: 3700 remove_proc_entry(PGCTRL, pn->proc_dir); 3701 remove: 3702 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3703 return ret; 3704 } 3705 3706 static void __net_exit pg_net_exit(struct net *net) 3707 { 3708 struct pktgen_net *pn = net_generic(net, pg_net_id); 3709 struct pktgen_thread *t; 3710 struct list_head *q, *n; 3711 LIST_HEAD(list); 3712 3713 /* Stop all interfaces & threads */ 3714 pn->pktgen_exiting = true; 3715 3716 mutex_lock(&pktgen_thread_lock); 3717 list_splice_init(&pn->pktgen_threads, &list); 3718 mutex_unlock(&pktgen_thread_lock); 3719 3720 list_for_each_safe(q, n, &list) { 3721 t = list_entry(q, struct pktgen_thread, th_list); 3722 list_del(&t->th_list); 3723 kthread_stop(t->tsk); 3724 kfree(t); 3725 } 3726 3727 remove_proc_entry(PGCTRL, pn->proc_dir); 3728 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3729 } 3730 3731 static struct pernet_operations pg_net_ops = { 3732 .init = pg_net_init, 3733 .exit = pg_net_exit, 3734 .id = &pg_net_id, 3735 .size = sizeof(struct pktgen_net), 3736 }; 3737 3738 static int __init pg_init(void) 3739 { 3740 int ret = 0; 3741 3742 pr_info("%s", version); 3743 ret = register_pernet_subsys(&pg_net_ops); 3744 if (ret) 3745 return ret; 3746 ret = register_netdevice_notifier(&pktgen_notifier_block); 3747 if (ret) 3748 unregister_pernet_subsys(&pg_net_ops); 3749 3750 return ret; 3751 } 3752 3753 static void __exit pg_cleanup(void) 3754 { 3755 unregister_netdevice_notifier(&pktgen_notifier_block); 3756 unregister_pernet_subsys(&pg_net_ops); 3757 } 3758 3759 module_init(pg_init); 3760 module_exit(pg_cleanup); 3761 3762 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3763 MODULE_DESCRIPTION("Packet Generator tool"); 3764 MODULE_LICENSE("GPL"); 3765 MODULE_VERSION(VERSION); 3766 module_param(pg_count_d, int, 0); 3767 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3768 module_param(pg_delay_d, int, 0); 3769 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3770 module_param(pg_clone_skb_d, int, 0); 3771 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3772 module_param(debug, int, 0); 3773 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3774