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. 73 * The if_list is RCU protected, and the if_lock remains to protect updating 74 * of if_list, from "add_device" as it invoked from userspace (via proc write). 75 * 76 * By design there should only be *one* "controlling" process. In practice 77 * multiple write accesses gives unpredictable result. Understood by "write" 78 * to /proc gives result code thats should be read be the "writer". 79 * For practical use this should be no problem. 80 * 81 * Note when adding devices to a specific CPU there good idea to also assign 82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 83 * --ro 84 * 85 * Fix refcount off by one if first packet fails, potential null deref, 86 * memleak 030710- KJP 87 * 88 * First "ranges" functionality for ipv6 030726 --ro 89 * 90 * Included flow support. 030802 ANK. 91 * 92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 93 * 94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 96 * 97 * New xmit() return, do_div and misc clean up by Stephen Hemminger 98 * <shemminger@osdl.org> 040923 99 * 100 * Randy Dunlap fixed u64 printk compiler warning 101 * 102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 104 * 105 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 107 * 108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 109 * 050103 110 * 111 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 112 * 113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 114 * 115 * Fixed src_mac command to set source mac of packet to value specified in 116 * command by Adit Ranadive <adit.262@gmail.com> 117 * 118 */ 119 120 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 121 122 #include <linux/sys.h> 123 #include <linux/types.h> 124 #include <linux/module.h> 125 #include <linux/moduleparam.h> 126 #include <linux/kernel.h> 127 #include <linux/mutex.h> 128 #include <linux/sched.h> 129 #include <linux/slab.h> 130 #include <linux/vmalloc.h> 131 #include <linux/unistd.h> 132 #include <linux/string.h> 133 #include <linux/ptrace.h> 134 #include <linux/errno.h> 135 #include <linux/ioport.h> 136 #include <linux/interrupt.h> 137 #include <linux/capability.h> 138 #include <linux/hrtimer.h> 139 #include <linux/freezer.h> 140 #include <linux/delay.h> 141 #include <linux/timer.h> 142 #include <linux/list.h> 143 #include <linux/init.h> 144 #include <linux/skbuff.h> 145 #include <linux/netdevice.h> 146 #include <linux/inet.h> 147 #include <linux/inetdevice.h> 148 #include <linux/rtnetlink.h> 149 #include <linux/if_arp.h> 150 #include <linux/if_vlan.h> 151 #include <linux/in.h> 152 #include <linux/ip.h> 153 #include <linux/ipv6.h> 154 #include <linux/udp.h> 155 #include <linux/proc_fs.h> 156 #include <linux/seq_file.h> 157 #include <linux/wait.h> 158 #include <linux/etherdevice.h> 159 #include <linux/kthread.h> 160 #include <linux/prefetch.h> 161 #include <net/net_namespace.h> 162 #include <net/checksum.h> 163 #include <net/ipv6.h> 164 #include <net/udp.h> 165 #include <net/ip6_checksum.h> 166 #include <net/addrconf.h> 167 #ifdef CONFIG_XFRM 168 #include <net/xfrm.h> 169 #endif 170 #include <net/netns/generic.h> 171 #include <asm/byteorder.h> 172 #include <linux/rcupdate.h> 173 #include <linux/bitops.h> 174 #include <linux/io.h> 175 #include <linux/timex.h> 176 #include <linux/uaccess.h> 177 #include <asm/dma.h> 178 #include <asm/div64.h> /* do_div */ 179 180 #define VERSION "2.74" 181 #define IP_NAME_SZ 32 182 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 183 #define MPLS_STACK_BOTTOM htonl(0x00000100) 184 185 #define func_enter() pr_debug("entering %s\n", __func__); 186 187 /* Device flag bits */ 188 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 189 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 190 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 191 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 192 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 193 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 194 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 195 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 196 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 197 #define F_VID_RND (1<<9) /* Random VLAN ID */ 198 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 199 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 200 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 201 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 202 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 203 #define F_NODE (1<<15) /* Node memory alloc*/ 204 #define F_UDPCSUM (1<<16) /* Include UDP checksum */ 205 #define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */ 206 207 /* Thread control flag bits */ 208 #define T_STOP (1<<0) /* Stop run */ 209 #define T_RUN (1<<1) /* Start run */ 210 #define T_REMDEVALL (1<<2) /* Remove all devs */ 211 #define T_REMDEV (1<<3) /* Remove one dev */ 212 213 /* If lock -- protects updating of if_list */ 214 #define if_lock(t) spin_lock(&(t->if_lock)); 215 #define if_unlock(t) spin_unlock(&(t->if_lock)); 216 217 /* Used to help with determining the pkts on receive */ 218 #define PKTGEN_MAGIC 0xbe9be955 219 #define PG_PROC_DIR "pktgen" 220 #define PGCTRL "pgctrl" 221 222 #define MAX_CFLOWS 65536 223 224 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 225 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 226 227 struct flow_state { 228 __be32 cur_daddr; 229 int count; 230 #ifdef CONFIG_XFRM 231 struct xfrm_state *x; 232 #endif 233 __u32 flags; 234 }; 235 236 /* flow flag bits */ 237 #define F_INIT (1<<0) /* flow has been initialized */ 238 239 struct pktgen_dev { 240 /* 241 * Try to keep frequent/infrequent used vars. separated. 242 */ 243 struct proc_dir_entry *entry; /* proc file */ 244 struct pktgen_thread *pg_thread;/* the owner */ 245 struct list_head list; /* chaining in the thread's run-queue */ 246 struct rcu_head rcu; /* freed by RCU */ 247 248 int running; /* if false, the test will stop */ 249 250 /* If min != max, then we will either do a linear iteration, or 251 * we will do a random selection from within the range. 252 */ 253 __u32 flags; 254 int removal_mark; /* non-zero => the device is marked for 255 * removal by worker thread */ 256 257 int min_pkt_size; 258 int max_pkt_size; 259 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 260 int nfrags; 261 struct page *page; 262 u64 delay; /* nano-seconds */ 263 264 __u64 count; /* Default No packets to send */ 265 __u64 sofar; /* How many pkts we've sent so far */ 266 __u64 tx_bytes; /* How many bytes we've transmitted */ 267 __u64 errors; /* Errors when trying to transmit, */ 268 269 /* runtime counters relating to clone_skb */ 270 271 __u64 allocated_skbs; 272 __u32 clone_count; 273 int last_ok; /* Was last skb sent? 274 * Or a failed transmit of some sort? 275 * This will keep sequence numbers in order 276 */ 277 ktime_t next_tx; 278 ktime_t started_at; 279 ktime_t stopped_at; 280 u64 idle_acc; /* nano-seconds */ 281 282 __u32 seq_num; 283 284 int clone_skb; /* 285 * Use multiple SKBs during packet gen. 286 * If this number is greater than 1, then 287 * that many copies of the same packet will be 288 * sent before a new packet is allocated. 289 * If you want to send 1024 identical packets 290 * before creating a new packet, 291 * set clone_skb to 1024. 292 */ 293 294 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 295 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 296 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 297 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 298 299 struct in6_addr in6_saddr; 300 struct in6_addr in6_daddr; 301 struct in6_addr cur_in6_daddr; 302 struct in6_addr cur_in6_saddr; 303 /* For ranges */ 304 struct in6_addr min_in6_daddr; 305 struct in6_addr max_in6_daddr; 306 struct in6_addr min_in6_saddr; 307 struct in6_addr max_in6_saddr; 308 309 /* If we're doing ranges, random or incremental, then this 310 * defines the min/max for those ranges. 311 */ 312 __be32 saddr_min; /* inclusive, source IP address */ 313 __be32 saddr_max; /* exclusive, source IP address */ 314 __be32 daddr_min; /* inclusive, dest IP address */ 315 __be32 daddr_max; /* exclusive, dest IP address */ 316 317 __u16 udp_src_min; /* inclusive, source UDP port */ 318 __u16 udp_src_max; /* exclusive, source UDP port */ 319 __u16 udp_dst_min; /* inclusive, dest UDP port */ 320 __u16 udp_dst_max; /* exclusive, dest UDP port */ 321 322 /* DSCP + ECN */ 323 __u8 tos; /* six MSB of (former) IPv4 TOS 324 are for dscp codepoint */ 325 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 326 (see RFC 3260, sec. 4) */ 327 328 /* MPLS */ 329 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 330 __be32 labels[MAX_MPLS_LABELS]; 331 332 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 333 __u8 vlan_p; 334 __u8 vlan_cfi; 335 __u16 vlan_id; /* 0xffff means no vlan tag */ 336 337 __u8 svlan_p; 338 __u8 svlan_cfi; 339 __u16 svlan_id; /* 0xffff means no svlan tag */ 340 341 __u32 src_mac_count; /* How many MACs to iterate through */ 342 __u32 dst_mac_count; /* How many MACs to iterate through */ 343 344 unsigned char dst_mac[ETH_ALEN]; 345 unsigned char src_mac[ETH_ALEN]; 346 347 __u32 cur_dst_mac_offset; 348 __u32 cur_src_mac_offset; 349 __be32 cur_saddr; 350 __be32 cur_daddr; 351 __u16 ip_id; 352 __u16 cur_udp_dst; 353 __u16 cur_udp_src; 354 __u16 cur_queue_map; 355 __u32 cur_pkt_size; 356 __u32 last_pkt_size; 357 358 __u8 hh[14]; 359 /* = { 360 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 361 362 We fill in SRC address later 363 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 364 0x08, 0x00 365 }; 366 */ 367 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 368 369 struct sk_buff *skb; /* skb we are to transmit next, used for when we 370 * are transmitting the same one multiple times 371 */ 372 struct net_device *odev; /* The out-going device. 373 * Note that the device should have it's 374 * pg_info pointer pointing back to this 375 * device. 376 * Set when the user specifies the out-going 377 * device name (not when the inject is 378 * started as it used to do.) 379 */ 380 char odevname[32]; 381 struct flow_state *flows; 382 unsigned int cflows; /* Concurrent flows (config) */ 383 unsigned int lflow; /* Flow length (config) */ 384 unsigned int nflows; /* accumulated flows (stats) */ 385 unsigned int curfl; /* current sequenced flow (state)*/ 386 387 u16 queue_map_min; 388 u16 queue_map_max; 389 __u32 skb_priority; /* skb priority field */ 390 unsigned int burst; /* number of duplicated packets to burst */ 391 int node; /* Memory node */ 392 393 #ifdef CONFIG_XFRM 394 __u8 ipsmode; /* IPSEC mode (config) */ 395 __u8 ipsproto; /* IPSEC type (config) */ 396 __u32 spi; 397 struct dst_entry dst; 398 struct dst_ops dstops; 399 #endif 400 char result[512]; 401 }; 402 403 struct pktgen_hdr { 404 __be32 pgh_magic; 405 __be32 seq_num; 406 __be32 tv_sec; 407 __be32 tv_usec; 408 }; 409 410 411 static int pg_net_id __read_mostly; 412 413 struct pktgen_net { 414 struct net *net; 415 struct proc_dir_entry *proc_dir; 416 struct list_head pktgen_threads; 417 bool pktgen_exiting; 418 }; 419 420 struct pktgen_thread { 421 spinlock_t if_lock; /* for list of devices */ 422 struct list_head if_list; /* All device here */ 423 struct list_head th_list; 424 struct task_struct *tsk; 425 char result[512]; 426 427 /* Field for thread to receive "posted" events terminate, 428 stop ifs etc. */ 429 430 u32 control; 431 int cpu; 432 433 wait_queue_head_t queue; 434 struct completion start_done; 435 struct pktgen_net *net; 436 }; 437 438 #define REMOVE 1 439 #define FIND 0 440 441 static const char version[] = 442 "Packet Generator for packet performance testing. " 443 "Version: " VERSION "\n"; 444 445 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 446 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 447 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 448 const char *ifname, bool exact); 449 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 450 static void pktgen_run_all_threads(struct pktgen_net *pn); 451 static void pktgen_reset_all_threads(struct pktgen_net *pn); 452 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); 453 454 static void pktgen_stop(struct pktgen_thread *t); 455 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 456 457 /* Module parameters, defaults. */ 458 static int pg_count_d __read_mostly = 1000; 459 static int pg_delay_d __read_mostly; 460 static int pg_clone_skb_d __read_mostly; 461 static int debug __read_mostly; 462 463 static DEFINE_MUTEX(pktgen_thread_lock); 464 465 static struct notifier_block pktgen_notifier_block = { 466 .notifier_call = pktgen_device_event, 467 }; 468 469 /* 470 * /proc handling functions 471 * 472 */ 473 474 static int pgctrl_show(struct seq_file *seq, void *v) 475 { 476 seq_puts(seq, version); 477 return 0; 478 } 479 480 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 481 size_t count, loff_t *ppos) 482 { 483 char data[128]; 484 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 485 486 if (!capable(CAP_NET_ADMIN)) 487 return -EPERM; 488 489 if (count == 0) 490 return -EINVAL; 491 492 if (count > sizeof(data)) 493 count = sizeof(data); 494 495 if (copy_from_user(data, buf, count)) 496 return -EFAULT; 497 498 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */ 499 500 if (!strcmp(data, "stop")) 501 pktgen_stop_all_threads_ifs(pn); 502 503 else if (!strcmp(data, "start")) 504 pktgen_run_all_threads(pn); 505 506 else if (!strcmp(data, "reset")) 507 pktgen_reset_all_threads(pn); 508 509 else 510 pr_warn("Unknown command: %s\n", data); 511 512 return count; 513 } 514 515 static int pgctrl_open(struct inode *inode, struct file *file) 516 { 517 return single_open(file, pgctrl_show, PDE_DATA(inode)); 518 } 519 520 static const struct file_operations pktgen_fops = { 521 .owner = THIS_MODULE, 522 .open = pgctrl_open, 523 .read = seq_read, 524 .llseek = seq_lseek, 525 .write = pgctrl_write, 526 .release = single_release, 527 }; 528 529 static int pktgen_if_show(struct seq_file *seq, void *v) 530 { 531 const struct pktgen_dev *pkt_dev = seq->private; 532 ktime_t stopped; 533 u64 idle; 534 535 seq_printf(seq, 536 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 537 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 538 pkt_dev->max_pkt_size); 539 540 seq_printf(seq, 541 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 542 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 543 pkt_dev->clone_skb, pkt_dev->odevname); 544 545 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 546 pkt_dev->lflow); 547 548 seq_printf(seq, 549 " queue_map_min: %u queue_map_max: %u\n", 550 pkt_dev->queue_map_min, 551 pkt_dev->queue_map_max); 552 553 if (pkt_dev->skb_priority) 554 seq_printf(seq, " skb_priority: %u\n", 555 pkt_dev->skb_priority); 556 557 if (pkt_dev->flags & F_IPV6) { 558 seq_printf(seq, 559 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 560 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 561 &pkt_dev->in6_saddr, 562 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 563 &pkt_dev->in6_daddr, 564 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 565 } else { 566 seq_printf(seq, 567 " dst_min: %s dst_max: %s\n", 568 pkt_dev->dst_min, pkt_dev->dst_max); 569 seq_printf(seq, 570 " src_min: %s src_max: %s\n", 571 pkt_dev->src_min, pkt_dev->src_max); 572 } 573 574 seq_puts(seq, " src_mac: "); 575 576 seq_printf(seq, "%pM ", 577 is_zero_ether_addr(pkt_dev->src_mac) ? 578 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 579 580 seq_puts(seq, "dst_mac: "); 581 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 582 583 seq_printf(seq, 584 " udp_src_min: %d udp_src_max: %d" 585 " udp_dst_min: %d udp_dst_max: %d\n", 586 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 587 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 588 589 seq_printf(seq, 590 " src_mac_count: %d dst_mac_count: %d\n", 591 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 592 593 if (pkt_dev->nr_labels) { 594 unsigned int i; 595 seq_puts(seq, " mpls: "); 596 for (i = 0; i < pkt_dev->nr_labels; i++) 597 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 598 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 599 } 600 601 if (pkt_dev->vlan_id != 0xffff) 602 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 603 pkt_dev->vlan_id, pkt_dev->vlan_p, 604 pkt_dev->vlan_cfi); 605 606 if (pkt_dev->svlan_id != 0xffff) 607 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 608 pkt_dev->svlan_id, pkt_dev->svlan_p, 609 pkt_dev->svlan_cfi); 610 611 if (pkt_dev->tos) 612 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 613 614 if (pkt_dev->traffic_class) 615 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 616 617 if (pkt_dev->burst > 1) 618 seq_printf(seq, " burst: %d\n", pkt_dev->burst); 619 620 if (pkt_dev->node >= 0) 621 seq_printf(seq, " node: %d\n", pkt_dev->node); 622 623 seq_puts(seq, " Flags: "); 624 625 if (pkt_dev->flags & F_IPV6) 626 seq_puts(seq, "IPV6 "); 627 628 if (pkt_dev->flags & F_IPSRC_RND) 629 seq_puts(seq, "IPSRC_RND "); 630 631 if (pkt_dev->flags & F_IPDST_RND) 632 seq_puts(seq, "IPDST_RND "); 633 634 if (pkt_dev->flags & F_TXSIZE_RND) 635 seq_puts(seq, "TXSIZE_RND "); 636 637 if (pkt_dev->flags & F_UDPSRC_RND) 638 seq_puts(seq, "UDPSRC_RND "); 639 640 if (pkt_dev->flags & F_UDPDST_RND) 641 seq_puts(seq, "UDPDST_RND "); 642 643 if (pkt_dev->flags & F_UDPCSUM) 644 seq_puts(seq, "UDPCSUM "); 645 646 if (pkt_dev->flags & F_NO_TIMESTAMP) 647 seq_puts(seq, "NO_TIMESTAMP "); 648 649 if (pkt_dev->flags & F_MPLS_RND) 650 seq_puts(seq, "MPLS_RND "); 651 652 if (pkt_dev->flags & F_QUEUE_MAP_RND) 653 seq_puts(seq, "QUEUE_MAP_RND "); 654 655 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 656 seq_puts(seq, "QUEUE_MAP_CPU "); 657 658 if (pkt_dev->cflows) { 659 if (pkt_dev->flags & F_FLOW_SEQ) 660 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/ 661 else 662 seq_puts(seq, "FLOW_RND "); 663 } 664 665 #ifdef CONFIG_XFRM 666 if (pkt_dev->flags & F_IPSEC_ON) { 667 seq_puts(seq, "IPSEC "); 668 if (pkt_dev->spi) 669 seq_printf(seq, "spi:%u", pkt_dev->spi); 670 } 671 #endif 672 673 if (pkt_dev->flags & F_MACSRC_RND) 674 seq_puts(seq, "MACSRC_RND "); 675 676 if (pkt_dev->flags & F_MACDST_RND) 677 seq_puts(seq, "MACDST_RND "); 678 679 if (pkt_dev->flags & F_VID_RND) 680 seq_puts(seq, "VID_RND "); 681 682 if (pkt_dev->flags & F_SVID_RND) 683 seq_puts(seq, "SVID_RND "); 684 685 if (pkt_dev->flags & F_NODE) 686 seq_puts(seq, "NODE_ALLOC "); 687 688 seq_puts(seq, "\n"); 689 690 /* not really stopped, more like last-running-at */ 691 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 692 idle = pkt_dev->idle_acc; 693 do_div(idle, NSEC_PER_USEC); 694 695 seq_printf(seq, 696 "Current:\n pkts-sofar: %llu errors: %llu\n", 697 (unsigned long long)pkt_dev->sofar, 698 (unsigned long long)pkt_dev->errors); 699 700 seq_printf(seq, 701 " started: %lluus stopped: %lluus idle: %lluus\n", 702 (unsigned long long) ktime_to_us(pkt_dev->started_at), 703 (unsigned long long) ktime_to_us(stopped), 704 (unsigned long long) idle); 705 706 seq_printf(seq, 707 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 708 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 709 pkt_dev->cur_src_mac_offset); 710 711 if (pkt_dev->flags & F_IPV6) { 712 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 713 &pkt_dev->cur_in6_saddr, 714 &pkt_dev->cur_in6_daddr); 715 } else 716 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 717 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 718 719 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 720 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 721 722 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 723 724 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 725 726 if (pkt_dev->result[0]) 727 seq_printf(seq, "Result: %s\n", pkt_dev->result); 728 else 729 seq_puts(seq, "Result: Idle\n"); 730 731 return 0; 732 } 733 734 735 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 736 __u32 *num) 737 { 738 int i = 0; 739 *num = 0; 740 741 for (; i < maxlen; i++) { 742 int value; 743 char c; 744 *num <<= 4; 745 if (get_user(c, &user_buffer[i])) 746 return -EFAULT; 747 value = hex_to_bin(c); 748 if (value >= 0) 749 *num |= value; 750 else 751 break; 752 } 753 return i; 754 } 755 756 static int count_trail_chars(const char __user * user_buffer, 757 unsigned int maxlen) 758 { 759 int i; 760 761 for (i = 0; i < maxlen; i++) { 762 char c; 763 if (get_user(c, &user_buffer[i])) 764 return -EFAULT; 765 switch (c) { 766 case '\"': 767 case '\n': 768 case '\r': 769 case '\t': 770 case ' ': 771 case '=': 772 break; 773 default: 774 goto done; 775 } 776 } 777 done: 778 return i; 779 } 780 781 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 782 unsigned long *num) 783 { 784 int i; 785 *num = 0; 786 787 for (i = 0; i < maxlen; i++) { 788 char c; 789 if (get_user(c, &user_buffer[i])) 790 return -EFAULT; 791 if ((c >= '0') && (c <= '9')) { 792 *num *= 10; 793 *num += c - '0'; 794 } else 795 break; 796 } 797 return i; 798 } 799 800 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 801 { 802 int i; 803 804 for (i = 0; i < maxlen; i++) { 805 char c; 806 if (get_user(c, &user_buffer[i])) 807 return -EFAULT; 808 switch (c) { 809 case '\"': 810 case '\n': 811 case '\r': 812 case '\t': 813 case ' ': 814 goto done_str; 815 default: 816 break; 817 } 818 } 819 done_str: 820 return i; 821 } 822 823 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 824 { 825 unsigned int n = 0; 826 char c; 827 ssize_t i = 0; 828 int len; 829 830 pkt_dev->nr_labels = 0; 831 do { 832 __u32 tmp; 833 len = hex32_arg(&buffer[i], 8, &tmp); 834 if (len <= 0) 835 return len; 836 pkt_dev->labels[n] = htonl(tmp); 837 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 838 pkt_dev->flags |= F_MPLS_RND; 839 i += len; 840 if (get_user(c, &buffer[i])) 841 return -EFAULT; 842 i++; 843 n++; 844 if (n >= MAX_MPLS_LABELS) 845 return -E2BIG; 846 } while (c == ','); 847 848 pkt_dev->nr_labels = n; 849 return i; 850 } 851 852 static ssize_t pktgen_if_write(struct file *file, 853 const char __user * user_buffer, size_t count, 854 loff_t * offset) 855 { 856 struct seq_file *seq = file->private_data; 857 struct pktgen_dev *pkt_dev = seq->private; 858 int i, max, len; 859 char name[16], valstr[32]; 860 unsigned long value = 0; 861 char *pg_result = NULL; 862 int tmp = 0; 863 char buf[128]; 864 865 pg_result = &(pkt_dev->result[0]); 866 867 if (count < 1) { 868 pr_warn("wrong command format\n"); 869 return -EINVAL; 870 } 871 872 max = count; 873 tmp = count_trail_chars(user_buffer, max); 874 if (tmp < 0) { 875 pr_warn("illegal format\n"); 876 return tmp; 877 } 878 i = tmp; 879 880 /* Read variable name */ 881 882 len = strn_len(&user_buffer[i], sizeof(name) - 1); 883 if (len < 0) 884 return len; 885 886 memset(name, 0, sizeof(name)); 887 if (copy_from_user(name, &user_buffer[i], len)) 888 return -EFAULT; 889 i += len; 890 891 max = count - i; 892 len = count_trail_chars(&user_buffer[i], max); 893 if (len < 0) 894 return len; 895 896 i += len; 897 898 if (debug) { 899 size_t copy = min_t(size_t, count, 1023); 900 char tb[copy + 1]; 901 if (copy_from_user(tb, user_buffer, copy)) 902 return -EFAULT; 903 tb[copy] = 0; 904 pr_debug("%s,%lu buffer -:%s:-\n", 905 name, (unsigned long)count, tb); 906 } 907 908 if (!strcmp(name, "min_pkt_size")) { 909 len = num_arg(&user_buffer[i], 10, &value); 910 if (len < 0) 911 return len; 912 913 i += len; 914 if (value < 14 + 20 + 8) 915 value = 14 + 20 + 8; 916 if (value != pkt_dev->min_pkt_size) { 917 pkt_dev->min_pkt_size = value; 918 pkt_dev->cur_pkt_size = value; 919 } 920 sprintf(pg_result, "OK: min_pkt_size=%u", 921 pkt_dev->min_pkt_size); 922 return count; 923 } 924 925 if (!strcmp(name, "max_pkt_size")) { 926 len = num_arg(&user_buffer[i], 10, &value); 927 if (len < 0) 928 return len; 929 930 i += len; 931 if (value < 14 + 20 + 8) 932 value = 14 + 20 + 8; 933 if (value != pkt_dev->max_pkt_size) { 934 pkt_dev->max_pkt_size = value; 935 pkt_dev->cur_pkt_size = value; 936 } 937 sprintf(pg_result, "OK: max_pkt_size=%u", 938 pkt_dev->max_pkt_size); 939 return count; 940 } 941 942 /* Shortcut for min = max */ 943 944 if (!strcmp(name, "pkt_size")) { 945 len = num_arg(&user_buffer[i], 10, &value); 946 if (len < 0) 947 return len; 948 949 i += len; 950 if (value < 14 + 20 + 8) 951 value = 14 + 20 + 8; 952 if (value != pkt_dev->min_pkt_size) { 953 pkt_dev->min_pkt_size = value; 954 pkt_dev->max_pkt_size = value; 955 pkt_dev->cur_pkt_size = value; 956 } 957 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 958 return count; 959 } 960 961 if (!strcmp(name, "debug")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) 964 return len; 965 966 i += len; 967 debug = value; 968 sprintf(pg_result, "OK: debug=%u", debug); 969 return count; 970 } 971 972 if (!strcmp(name, "frags")) { 973 len = num_arg(&user_buffer[i], 10, &value); 974 if (len < 0) 975 return len; 976 977 i += len; 978 pkt_dev->nfrags = value; 979 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 980 return count; 981 } 982 if (!strcmp(name, "delay")) { 983 len = num_arg(&user_buffer[i], 10, &value); 984 if (len < 0) 985 return len; 986 987 i += len; 988 if (value == 0x7FFFFFFF) 989 pkt_dev->delay = ULLONG_MAX; 990 else 991 pkt_dev->delay = (u64)value; 992 993 sprintf(pg_result, "OK: delay=%llu", 994 (unsigned long long) pkt_dev->delay); 995 return count; 996 } 997 if (!strcmp(name, "rate")) { 998 len = num_arg(&user_buffer[i], 10, &value); 999 if (len < 0) 1000 return len; 1001 1002 i += len; 1003 if (!value) 1004 return len; 1005 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 1006 if (debug) 1007 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1008 1009 sprintf(pg_result, "OK: rate=%lu", value); 1010 return count; 1011 } 1012 if (!strcmp(name, "ratep")) { 1013 len = num_arg(&user_buffer[i], 10, &value); 1014 if (len < 0) 1015 return len; 1016 1017 i += len; 1018 if (!value) 1019 return len; 1020 pkt_dev->delay = NSEC_PER_SEC/value; 1021 if (debug) 1022 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1023 1024 sprintf(pg_result, "OK: rate=%lu", value); 1025 return count; 1026 } 1027 if (!strcmp(name, "udp_src_min")) { 1028 len = num_arg(&user_buffer[i], 10, &value); 1029 if (len < 0) 1030 return len; 1031 1032 i += len; 1033 if (value != pkt_dev->udp_src_min) { 1034 pkt_dev->udp_src_min = value; 1035 pkt_dev->cur_udp_src = value; 1036 } 1037 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1038 return count; 1039 } 1040 if (!strcmp(name, "udp_dst_min")) { 1041 len = num_arg(&user_buffer[i], 10, &value); 1042 if (len < 0) 1043 return len; 1044 1045 i += len; 1046 if (value != pkt_dev->udp_dst_min) { 1047 pkt_dev->udp_dst_min = value; 1048 pkt_dev->cur_udp_dst = value; 1049 } 1050 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1051 return count; 1052 } 1053 if (!strcmp(name, "udp_src_max")) { 1054 len = num_arg(&user_buffer[i], 10, &value); 1055 if (len < 0) 1056 return len; 1057 1058 i += len; 1059 if (value != pkt_dev->udp_src_max) { 1060 pkt_dev->udp_src_max = value; 1061 pkt_dev->cur_udp_src = value; 1062 } 1063 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1064 return count; 1065 } 1066 if (!strcmp(name, "udp_dst_max")) { 1067 len = num_arg(&user_buffer[i], 10, &value); 1068 if (len < 0) 1069 return len; 1070 1071 i += len; 1072 if (value != pkt_dev->udp_dst_max) { 1073 pkt_dev->udp_dst_max = value; 1074 pkt_dev->cur_udp_dst = value; 1075 } 1076 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1077 return count; 1078 } 1079 if (!strcmp(name, "clone_skb")) { 1080 len = num_arg(&user_buffer[i], 10, &value); 1081 if (len < 0) 1082 return len; 1083 if ((value > 0) && 1084 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1085 return -ENOTSUPP; 1086 i += len; 1087 pkt_dev->clone_skb = value; 1088 1089 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1090 return count; 1091 } 1092 if (!strcmp(name, "count")) { 1093 len = num_arg(&user_buffer[i], 10, &value); 1094 if (len < 0) 1095 return len; 1096 1097 i += len; 1098 pkt_dev->count = value; 1099 sprintf(pg_result, "OK: count=%llu", 1100 (unsigned long long)pkt_dev->count); 1101 return count; 1102 } 1103 if (!strcmp(name, "src_mac_count")) { 1104 len = num_arg(&user_buffer[i], 10, &value); 1105 if (len < 0) 1106 return len; 1107 1108 i += len; 1109 if (pkt_dev->src_mac_count != value) { 1110 pkt_dev->src_mac_count = value; 1111 pkt_dev->cur_src_mac_offset = 0; 1112 } 1113 sprintf(pg_result, "OK: src_mac_count=%d", 1114 pkt_dev->src_mac_count); 1115 return count; 1116 } 1117 if (!strcmp(name, "dst_mac_count")) { 1118 len = num_arg(&user_buffer[i], 10, &value); 1119 if (len < 0) 1120 return len; 1121 1122 i += len; 1123 if (pkt_dev->dst_mac_count != value) { 1124 pkt_dev->dst_mac_count = value; 1125 pkt_dev->cur_dst_mac_offset = 0; 1126 } 1127 sprintf(pg_result, "OK: dst_mac_count=%d", 1128 pkt_dev->dst_mac_count); 1129 return count; 1130 } 1131 if (!strcmp(name, "burst")) { 1132 len = num_arg(&user_buffer[i], 10, &value); 1133 if (len < 0) 1134 return len; 1135 1136 i += len; 1137 if ((value > 1) && 1138 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1139 return -ENOTSUPP; 1140 pkt_dev->burst = value < 1 ? 1 : value; 1141 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst); 1142 return count; 1143 } 1144 if (!strcmp(name, "node")) { 1145 len = num_arg(&user_buffer[i], 10, &value); 1146 if (len < 0) 1147 return len; 1148 1149 i += len; 1150 1151 if (node_possible(value)) { 1152 pkt_dev->node = value; 1153 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1154 if (pkt_dev->page) { 1155 put_page(pkt_dev->page); 1156 pkt_dev->page = NULL; 1157 } 1158 } 1159 else 1160 sprintf(pg_result, "ERROR: node not possible"); 1161 return count; 1162 } 1163 if (!strcmp(name, "flag")) { 1164 char f[32]; 1165 memset(f, 0, 32); 1166 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1167 if (len < 0) 1168 return len; 1169 1170 if (copy_from_user(f, &user_buffer[i], len)) 1171 return -EFAULT; 1172 i += len; 1173 if (strcmp(f, "IPSRC_RND") == 0) 1174 pkt_dev->flags |= F_IPSRC_RND; 1175 1176 else if (strcmp(f, "!IPSRC_RND") == 0) 1177 pkt_dev->flags &= ~F_IPSRC_RND; 1178 1179 else if (strcmp(f, "TXSIZE_RND") == 0) 1180 pkt_dev->flags |= F_TXSIZE_RND; 1181 1182 else if (strcmp(f, "!TXSIZE_RND") == 0) 1183 pkt_dev->flags &= ~F_TXSIZE_RND; 1184 1185 else if (strcmp(f, "IPDST_RND") == 0) 1186 pkt_dev->flags |= F_IPDST_RND; 1187 1188 else if (strcmp(f, "!IPDST_RND") == 0) 1189 pkt_dev->flags &= ~F_IPDST_RND; 1190 1191 else if (strcmp(f, "UDPSRC_RND") == 0) 1192 pkt_dev->flags |= F_UDPSRC_RND; 1193 1194 else if (strcmp(f, "!UDPSRC_RND") == 0) 1195 pkt_dev->flags &= ~F_UDPSRC_RND; 1196 1197 else if (strcmp(f, "UDPDST_RND") == 0) 1198 pkt_dev->flags |= F_UDPDST_RND; 1199 1200 else if (strcmp(f, "!UDPDST_RND") == 0) 1201 pkt_dev->flags &= ~F_UDPDST_RND; 1202 1203 else if (strcmp(f, "MACSRC_RND") == 0) 1204 pkt_dev->flags |= F_MACSRC_RND; 1205 1206 else if (strcmp(f, "!MACSRC_RND") == 0) 1207 pkt_dev->flags &= ~F_MACSRC_RND; 1208 1209 else if (strcmp(f, "MACDST_RND") == 0) 1210 pkt_dev->flags |= F_MACDST_RND; 1211 1212 else if (strcmp(f, "!MACDST_RND") == 0) 1213 pkt_dev->flags &= ~F_MACDST_RND; 1214 1215 else if (strcmp(f, "MPLS_RND") == 0) 1216 pkt_dev->flags |= F_MPLS_RND; 1217 1218 else if (strcmp(f, "!MPLS_RND") == 0) 1219 pkt_dev->flags &= ~F_MPLS_RND; 1220 1221 else if (strcmp(f, "VID_RND") == 0) 1222 pkt_dev->flags |= F_VID_RND; 1223 1224 else if (strcmp(f, "!VID_RND") == 0) 1225 pkt_dev->flags &= ~F_VID_RND; 1226 1227 else if (strcmp(f, "SVID_RND") == 0) 1228 pkt_dev->flags |= F_SVID_RND; 1229 1230 else if (strcmp(f, "!SVID_RND") == 0) 1231 pkt_dev->flags &= ~F_SVID_RND; 1232 1233 else if (strcmp(f, "FLOW_SEQ") == 0) 1234 pkt_dev->flags |= F_FLOW_SEQ; 1235 1236 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1237 pkt_dev->flags |= F_QUEUE_MAP_RND; 1238 1239 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1240 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1241 1242 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1243 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1244 1245 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1246 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1247 #ifdef CONFIG_XFRM 1248 else if (strcmp(f, "IPSEC") == 0) 1249 pkt_dev->flags |= F_IPSEC_ON; 1250 #endif 1251 1252 else if (strcmp(f, "!IPV6") == 0) 1253 pkt_dev->flags &= ~F_IPV6; 1254 1255 else if (strcmp(f, "NODE_ALLOC") == 0) 1256 pkt_dev->flags |= F_NODE; 1257 1258 else if (strcmp(f, "!NODE_ALLOC") == 0) 1259 pkt_dev->flags &= ~F_NODE; 1260 1261 else if (strcmp(f, "UDPCSUM") == 0) 1262 pkt_dev->flags |= F_UDPCSUM; 1263 1264 else if (strcmp(f, "!UDPCSUM") == 0) 1265 pkt_dev->flags &= ~F_UDPCSUM; 1266 1267 else if (strcmp(f, "NO_TIMESTAMP") == 0) 1268 pkt_dev->flags |= F_NO_TIMESTAMP; 1269 1270 else { 1271 sprintf(pg_result, 1272 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1273 f, 1274 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1275 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " 1276 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " 1277 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " 1278 "NO_TIMESTAMP, " 1279 #ifdef CONFIG_XFRM 1280 "IPSEC, " 1281 #endif 1282 "NODE_ALLOC\n"); 1283 return count; 1284 } 1285 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1286 return count; 1287 } 1288 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1289 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1290 if (len < 0) 1291 return len; 1292 1293 if (copy_from_user(buf, &user_buffer[i], len)) 1294 return -EFAULT; 1295 buf[len] = 0; 1296 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1297 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1298 strncpy(pkt_dev->dst_min, buf, len); 1299 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1300 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1301 } 1302 if (debug) 1303 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1304 i += len; 1305 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1306 return count; 1307 } 1308 if (!strcmp(name, "dst_max")) { 1309 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1310 if (len < 0) 1311 return len; 1312 1313 1314 if (copy_from_user(buf, &user_buffer[i], len)) 1315 return -EFAULT; 1316 1317 buf[len] = 0; 1318 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1319 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1320 strncpy(pkt_dev->dst_max, buf, len); 1321 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1322 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1323 } 1324 if (debug) 1325 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1326 i += len; 1327 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1328 return count; 1329 } 1330 if (!strcmp(name, "dst6")) { 1331 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1332 if (len < 0) 1333 return len; 1334 1335 pkt_dev->flags |= F_IPV6; 1336 1337 if (copy_from_user(buf, &user_buffer[i], len)) 1338 return -EFAULT; 1339 buf[len] = 0; 1340 1341 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1342 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1343 1344 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1345 1346 if (debug) 1347 pr_debug("dst6 set to: %s\n", buf); 1348 1349 i += len; 1350 sprintf(pg_result, "OK: dst6=%s", buf); 1351 return count; 1352 } 1353 if (!strcmp(name, "dst6_min")) { 1354 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1355 if (len < 0) 1356 return len; 1357 1358 pkt_dev->flags |= F_IPV6; 1359 1360 if (copy_from_user(buf, &user_buffer[i], len)) 1361 return -EFAULT; 1362 buf[len] = 0; 1363 1364 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1365 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1366 1367 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1368 if (debug) 1369 pr_debug("dst6_min set to: %s\n", buf); 1370 1371 i += len; 1372 sprintf(pg_result, "OK: dst6_min=%s", buf); 1373 return count; 1374 } 1375 if (!strcmp(name, "dst6_max")) { 1376 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1377 if (len < 0) 1378 return len; 1379 1380 pkt_dev->flags |= F_IPV6; 1381 1382 if (copy_from_user(buf, &user_buffer[i], len)) 1383 return -EFAULT; 1384 buf[len] = 0; 1385 1386 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1387 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1388 1389 if (debug) 1390 pr_debug("dst6_max set to: %s\n", buf); 1391 1392 i += len; 1393 sprintf(pg_result, "OK: dst6_max=%s", buf); 1394 return count; 1395 } 1396 if (!strcmp(name, "src6")) { 1397 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1398 if (len < 0) 1399 return len; 1400 1401 pkt_dev->flags |= F_IPV6; 1402 1403 if (copy_from_user(buf, &user_buffer[i], len)) 1404 return -EFAULT; 1405 buf[len] = 0; 1406 1407 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1408 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1409 1410 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1411 1412 if (debug) 1413 pr_debug("src6 set to: %s\n", buf); 1414 1415 i += len; 1416 sprintf(pg_result, "OK: src6=%s", buf); 1417 return count; 1418 } 1419 if (!strcmp(name, "src_min")) { 1420 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1421 if (len < 0) 1422 return len; 1423 1424 if (copy_from_user(buf, &user_buffer[i], len)) 1425 return -EFAULT; 1426 buf[len] = 0; 1427 if (strcmp(buf, pkt_dev->src_min) != 0) { 1428 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1429 strncpy(pkt_dev->src_min, buf, len); 1430 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1431 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1432 } 1433 if (debug) 1434 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1435 i += len; 1436 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1437 return count; 1438 } 1439 if (!strcmp(name, "src_max")) { 1440 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1441 if (len < 0) 1442 return len; 1443 1444 if (copy_from_user(buf, &user_buffer[i], len)) 1445 return -EFAULT; 1446 buf[len] = 0; 1447 if (strcmp(buf, pkt_dev->src_max) != 0) { 1448 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1449 strncpy(pkt_dev->src_max, buf, len); 1450 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1451 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1452 } 1453 if (debug) 1454 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1455 i += len; 1456 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1457 return count; 1458 } 1459 if (!strcmp(name, "dst_mac")) { 1460 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1461 if (len < 0) 1462 return len; 1463 1464 memset(valstr, 0, sizeof(valstr)); 1465 if (copy_from_user(valstr, &user_buffer[i], len)) 1466 return -EFAULT; 1467 1468 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1469 return -EINVAL; 1470 /* Set up Dest MAC */ 1471 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); 1472 1473 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1474 return count; 1475 } 1476 if (!strcmp(name, "src_mac")) { 1477 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1478 if (len < 0) 1479 return len; 1480 1481 memset(valstr, 0, sizeof(valstr)); 1482 if (copy_from_user(valstr, &user_buffer[i], len)) 1483 return -EFAULT; 1484 1485 if (!mac_pton(valstr, pkt_dev->src_mac)) 1486 return -EINVAL; 1487 /* Set up Src MAC */ 1488 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); 1489 1490 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1491 return count; 1492 } 1493 1494 if (!strcmp(name, "clear_counters")) { 1495 pktgen_clear_counters(pkt_dev); 1496 sprintf(pg_result, "OK: Clearing counters.\n"); 1497 return count; 1498 } 1499 1500 if (!strcmp(name, "flows")) { 1501 len = num_arg(&user_buffer[i], 10, &value); 1502 if (len < 0) 1503 return len; 1504 1505 i += len; 1506 if (value > MAX_CFLOWS) 1507 value = MAX_CFLOWS; 1508 1509 pkt_dev->cflows = value; 1510 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1511 return count; 1512 } 1513 #ifdef CONFIG_XFRM 1514 if (!strcmp(name, "spi")) { 1515 len = num_arg(&user_buffer[i], 10, &value); 1516 if (len < 0) 1517 return len; 1518 1519 i += len; 1520 pkt_dev->spi = value; 1521 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); 1522 return count; 1523 } 1524 #endif 1525 if (!strcmp(name, "flowlen")) { 1526 len = num_arg(&user_buffer[i], 10, &value); 1527 if (len < 0) 1528 return len; 1529 1530 i += len; 1531 pkt_dev->lflow = value; 1532 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1533 return count; 1534 } 1535 1536 if (!strcmp(name, "queue_map_min")) { 1537 len = num_arg(&user_buffer[i], 5, &value); 1538 if (len < 0) 1539 return len; 1540 1541 i += len; 1542 pkt_dev->queue_map_min = value; 1543 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1544 return count; 1545 } 1546 1547 if (!strcmp(name, "queue_map_max")) { 1548 len = num_arg(&user_buffer[i], 5, &value); 1549 if (len < 0) 1550 return len; 1551 1552 i += len; 1553 pkt_dev->queue_map_max = value; 1554 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1555 return count; 1556 } 1557 1558 if (!strcmp(name, "mpls")) { 1559 unsigned int n, cnt; 1560 1561 len = get_labels(&user_buffer[i], pkt_dev); 1562 if (len < 0) 1563 return len; 1564 i += len; 1565 cnt = sprintf(pg_result, "OK: mpls="); 1566 for (n = 0; n < pkt_dev->nr_labels; n++) 1567 cnt += sprintf(pg_result + cnt, 1568 "%08x%s", ntohl(pkt_dev->labels[n]), 1569 n == pkt_dev->nr_labels-1 ? "" : ","); 1570 1571 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1572 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1573 pkt_dev->svlan_id = 0xffff; 1574 1575 if (debug) 1576 pr_debug("VLAN/SVLAN auto turned off\n"); 1577 } 1578 return count; 1579 } 1580 1581 if (!strcmp(name, "vlan_id")) { 1582 len = num_arg(&user_buffer[i], 4, &value); 1583 if (len < 0) 1584 return len; 1585 1586 i += len; 1587 if (value <= 4095) { 1588 pkt_dev->vlan_id = value; /* turn on VLAN */ 1589 1590 if (debug) 1591 pr_debug("VLAN turned on\n"); 1592 1593 if (debug && pkt_dev->nr_labels) 1594 pr_debug("MPLS auto turned off\n"); 1595 1596 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1597 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1598 } else { 1599 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1600 pkt_dev->svlan_id = 0xffff; 1601 1602 if (debug) 1603 pr_debug("VLAN/SVLAN turned off\n"); 1604 } 1605 return count; 1606 } 1607 1608 if (!strcmp(name, "vlan_p")) { 1609 len = num_arg(&user_buffer[i], 1, &value); 1610 if (len < 0) 1611 return len; 1612 1613 i += len; 1614 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1615 pkt_dev->vlan_p = value; 1616 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1617 } else { 1618 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1619 } 1620 return count; 1621 } 1622 1623 if (!strcmp(name, "vlan_cfi")) { 1624 len = num_arg(&user_buffer[i], 1, &value); 1625 if (len < 0) 1626 return len; 1627 1628 i += len; 1629 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1630 pkt_dev->vlan_cfi = value; 1631 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1632 } else { 1633 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1634 } 1635 return count; 1636 } 1637 1638 if (!strcmp(name, "svlan_id")) { 1639 len = num_arg(&user_buffer[i], 4, &value); 1640 if (len < 0) 1641 return len; 1642 1643 i += len; 1644 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1645 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1646 1647 if (debug) 1648 pr_debug("SVLAN turned on\n"); 1649 1650 if (debug && pkt_dev->nr_labels) 1651 pr_debug("MPLS auto turned off\n"); 1652 1653 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1654 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1655 } else { 1656 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1657 pkt_dev->svlan_id = 0xffff; 1658 1659 if (debug) 1660 pr_debug("VLAN/SVLAN turned off\n"); 1661 } 1662 return count; 1663 } 1664 1665 if (!strcmp(name, "svlan_p")) { 1666 len = num_arg(&user_buffer[i], 1, &value); 1667 if (len < 0) 1668 return len; 1669 1670 i += len; 1671 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1672 pkt_dev->svlan_p = value; 1673 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1674 } else { 1675 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1676 } 1677 return count; 1678 } 1679 1680 if (!strcmp(name, "svlan_cfi")) { 1681 len = num_arg(&user_buffer[i], 1, &value); 1682 if (len < 0) 1683 return len; 1684 1685 i += len; 1686 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1687 pkt_dev->svlan_cfi = value; 1688 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1689 } else { 1690 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1691 } 1692 return count; 1693 } 1694 1695 if (!strcmp(name, "tos")) { 1696 __u32 tmp_value = 0; 1697 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1698 if (len < 0) 1699 return len; 1700 1701 i += len; 1702 if (len == 2) { 1703 pkt_dev->tos = tmp_value; 1704 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1705 } else { 1706 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1707 } 1708 return count; 1709 } 1710 1711 if (!strcmp(name, "traffic_class")) { 1712 __u32 tmp_value = 0; 1713 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1714 if (len < 0) 1715 return len; 1716 1717 i += len; 1718 if (len == 2) { 1719 pkt_dev->traffic_class = tmp_value; 1720 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1721 } else { 1722 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1723 } 1724 return count; 1725 } 1726 1727 if (!strcmp(name, "skb_priority")) { 1728 len = num_arg(&user_buffer[i], 9, &value); 1729 if (len < 0) 1730 return len; 1731 1732 i += len; 1733 pkt_dev->skb_priority = value; 1734 sprintf(pg_result, "OK: skb_priority=%i", 1735 pkt_dev->skb_priority); 1736 return count; 1737 } 1738 1739 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1740 return -EINVAL; 1741 } 1742 1743 static int pktgen_if_open(struct inode *inode, struct file *file) 1744 { 1745 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1746 } 1747 1748 static const struct file_operations pktgen_if_fops = { 1749 .owner = THIS_MODULE, 1750 .open = pktgen_if_open, 1751 .read = seq_read, 1752 .llseek = seq_lseek, 1753 .write = pktgen_if_write, 1754 .release = single_release, 1755 }; 1756 1757 static int pktgen_thread_show(struct seq_file *seq, void *v) 1758 { 1759 struct pktgen_thread *t = seq->private; 1760 const struct pktgen_dev *pkt_dev; 1761 1762 BUG_ON(!t); 1763 1764 seq_puts(seq, "Running: "); 1765 1766 rcu_read_lock(); 1767 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1768 if (pkt_dev->running) 1769 seq_printf(seq, "%s ", pkt_dev->odevname); 1770 1771 seq_puts(seq, "\nStopped: "); 1772 1773 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1774 if (!pkt_dev->running) 1775 seq_printf(seq, "%s ", pkt_dev->odevname); 1776 1777 if (t->result[0]) 1778 seq_printf(seq, "\nResult: %s\n", t->result); 1779 else 1780 seq_puts(seq, "\nResult: NA\n"); 1781 1782 rcu_read_unlock(); 1783 1784 return 0; 1785 } 1786 1787 static ssize_t pktgen_thread_write(struct file *file, 1788 const char __user * user_buffer, 1789 size_t count, loff_t * offset) 1790 { 1791 struct seq_file *seq = file->private_data; 1792 struct pktgen_thread *t = seq->private; 1793 int i, max, len, ret; 1794 char name[40]; 1795 char *pg_result; 1796 1797 if (count < 1) { 1798 // sprintf(pg_result, "Wrong command format"); 1799 return -EINVAL; 1800 } 1801 1802 max = count; 1803 len = count_trail_chars(user_buffer, max); 1804 if (len < 0) 1805 return len; 1806 1807 i = len; 1808 1809 /* Read variable name */ 1810 1811 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1812 if (len < 0) 1813 return len; 1814 1815 memset(name, 0, sizeof(name)); 1816 if (copy_from_user(name, &user_buffer[i], len)) 1817 return -EFAULT; 1818 i += len; 1819 1820 max = count - i; 1821 len = count_trail_chars(&user_buffer[i], max); 1822 if (len < 0) 1823 return len; 1824 1825 i += len; 1826 1827 if (debug) 1828 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1829 1830 if (!t) { 1831 pr_err("ERROR: No thread\n"); 1832 ret = -EINVAL; 1833 goto out; 1834 } 1835 1836 pg_result = &(t->result[0]); 1837 1838 if (!strcmp(name, "add_device")) { 1839 char f[32]; 1840 memset(f, 0, 32); 1841 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1842 if (len < 0) { 1843 ret = len; 1844 goto out; 1845 } 1846 if (copy_from_user(f, &user_buffer[i], len)) 1847 return -EFAULT; 1848 i += len; 1849 mutex_lock(&pktgen_thread_lock); 1850 ret = pktgen_add_device(t, f); 1851 mutex_unlock(&pktgen_thread_lock); 1852 if (!ret) { 1853 ret = count; 1854 sprintf(pg_result, "OK: add_device=%s", f); 1855 } else 1856 sprintf(pg_result, "ERROR: can not add device %s", f); 1857 goto out; 1858 } 1859 1860 if (!strcmp(name, "rem_device_all")) { 1861 mutex_lock(&pktgen_thread_lock); 1862 t->control |= T_REMDEVALL; 1863 mutex_unlock(&pktgen_thread_lock); 1864 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1865 ret = count; 1866 sprintf(pg_result, "OK: rem_device_all"); 1867 goto out; 1868 } 1869 1870 if (!strcmp(name, "max_before_softirq")) { 1871 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1872 ret = count; 1873 goto out; 1874 } 1875 1876 ret = -EINVAL; 1877 out: 1878 return ret; 1879 } 1880 1881 static int pktgen_thread_open(struct inode *inode, struct file *file) 1882 { 1883 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1884 } 1885 1886 static const struct file_operations pktgen_thread_fops = { 1887 .owner = THIS_MODULE, 1888 .open = pktgen_thread_open, 1889 .read = seq_read, 1890 .llseek = seq_lseek, 1891 .write = pktgen_thread_write, 1892 .release = single_release, 1893 }; 1894 1895 /* Think find or remove for NN */ 1896 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1897 const char *ifname, int remove) 1898 { 1899 struct pktgen_thread *t; 1900 struct pktgen_dev *pkt_dev = NULL; 1901 bool exact = (remove == FIND); 1902 1903 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1904 pkt_dev = pktgen_find_dev(t, ifname, exact); 1905 if (pkt_dev) { 1906 if (remove) { 1907 pkt_dev->removal_mark = 1; 1908 t->control |= T_REMDEV; 1909 } 1910 break; 1911 } 1912 } 1913 return pkt_dev; 1914 } 1915 1916 /* 1917 * mark a device for removal 1918 */ 1919 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1920 { 1921 struct pktgen_dev *pkt_dev = NULL; 1922 const int max_tries = 10, msec_per_try = 125; 1923 int i = 0; 1924 1925 mutex_lock(&pktgen_thread_lock); 1926 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1927 1928 while (1) { 1929 1930 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1931 if (pkt_dev == NULL) 1932 break; /* success */ 1933 1934 mutex_unlock(&pktgen_thread_lock); 1935 pr_debug("%s: waiting for %s to disappear....\n", 1936 __func__, ifname); 1937 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1938 mutex_lock(&pktgen_thread_lock); 1939 1940 if (++i >= max_tries) { 1941 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1942 __func__, msec_per_try * i, ifname); 1943 break; 1944 } 1945 1946 } 1947 1948 mutex_unlock(&pktgen_thread_lock); 1949 } 1950 1951 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 1952 { 1953 struct pktgen_thread *t; 1954 1955 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1956 struct pktgen_dev *pkt_dev; 1957 1958 rcu_read_lock(); 1959 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 1960 if (pkt_dev->odev != dev) 1961 continue; 1962 1963 proc_remove(pkt_dev->entry); 1964 1965 pkt_dev->entry = proc_create_data(dev->name, 0600, 1966 pn->proc_dir, 1967 &pktgen_if_fops, 1968 pkt_dev); 1969 if (!pkt_dev->entry) 1970 pr_err("can't move proc entry for '%s'\n", 1971 dev->name); 1972 break; 1973 } 1974 rcu_read_unlock(); 1975 } 1976 } 1977 1978 static int pktgen_device_event(struct notifier_block *unused, 1979 unsigned long event, void *ptr) 1980 { 1981 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1982 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 1983 1984 if (pn->pktgen_exiting) 1985 return NOTIFY_DONE; 1986 1987 /* It is OK that we do not hold the group lock right now, 1988 * as we run under the RTNL lock. 1989 */ 1990 1991 switch (event) { 1992 case NETDEV_CHANGENAME: 1993 pktgen_change_name(pn, dev); 1994 break; 1995 1996 case NETDEV_UNREGISTER: 1997 pktgen_mark_device(pn, dev->name); 1998 break; 1999 } 2000 2001 return NOTIFY_DONE; 2002 } 2003 2004 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 2005 struct pktgen_dev *pkt_dev, 2006 const char *ifname) 2007 { 2008 char b[IFNAMSIZ+5]; 2009 int i; 2010 2011 for (i = 0; ifname[i] != '@'; i++) { 2012 if (i == IFNAMSIZ) 2013 break; 2014 2015 b[i] = ifname[i]; 2016 } 2017 b[i] = 0; 2018 2019 return dev_get_by_name(pn->net, b); 2020 } 2021 2022 2023 /* Associate pktgen_dev with a device. */ 2024 2025 static int pktgen_setup_dev(const struct pktgen_net *pn, 2026 struct pktgen_dev *pkt_dev, const char *ifname) 2027 { 2028 struct net_device *odev; 2029 int err; 2030 2031 /* Clean old setups */ 2032 if (pkt_dev->odev) { 2033 dev_put(pkt_dev->odev); 2034 pkt_dev->odev = NULL; 2035 } 2036 2037 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 2038 if (!odev) { 2039 pr_err("no such netdevice: \"%s\"\n", ifname); 2040 return -ENODEV; 2041 } 2042 2043 if (odev->type != ARPHRD_ETHER) { 2044 pr_err("not an ethernet device: \"%s\"\n", ifname); 2045 err = -EINVAL; 2046 } else if (!netif_running(odev)) { 2047 pr_err("device is down: \"%s\"\n", ifname); 2048 err = -ENETDOWN; 2049 } else { 2050 pkt_dev->odev = odev; 2051 return 0; 2052 } 2053 2054 dev_put(odev); 2055 return err; 2056 } 2057 2058 /* Read pkt_dev from the interface and set up internal pktgen_dev 2059 * structure to have the right information to create/send packets 2060 */ 2061 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2062 { 2063 int ntxq; 2064 2065 if (!pkt_dev->odev) { 2066 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2067 sprintf(pkt_dev->result, 2068 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2069 return; 2070 } 2071 2072 /* make sure that we don't pick a non-existing transmit queue */ 2073 ntxq = pkt_dev->odev->real_num_tx_queues; 2074 2075 if (ntxq <= pkt_dev->queue_map_min) { 2076 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2077 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2078 pkt_dev->odevname); 2079 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2080 } 2081 if (pkt_dev->queue_map_max >= ntxq) { 2082 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2083 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2084 pkt_dev->odevname); 2085 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2086 } 2087 2088 /* Default to the interface's mac if not explicitly set. */ 2089 2090 if (is_zero_ether_addr(pkt_dev->src_mac)) 2091 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); 2092 2093 /* Set up Dest MAC */ 2094 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); 2095 2096 if (pkt_dev->flags & F_IPV6) { 2097 int i, set = 0, err = 1; 2098 struct inet6_dev *idev; 2099 2100 if (pkt_dev->min_pkt_size == 0) { 2101 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2102 + sizeof(struct udphdr) 2103 + sizeof(struct pktgen_hdr) 2104 + pkt_dev->pkt_overhead; 2105 } 2106 2107 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2108 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2109 set = 1; 2110 break; 2111 } 2112 2113 if (!set) { 2114 2115 /* 2116 * Use linklevel address if unconfigured. 2117 * 2118 * use ipv6_get_lladdr if/when it's get exported 2119 */ 2120 2121 rcu_read_lock(); 2122 idev = __in6_dev_get(pkt_dev->odev); 2123 if (idev) { 2124 struct inet6_ifaddr *ifp; 2125 2126 read_lock_bh(&idev->lock); 2127 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2128 if ((ifp->scope & IFA_LINK) && 2129 !(ifp->flags & IFA_F_TENTATIVE)) { 2130 pkt_dev->cur_in6_saddr = ifp->addr; 2131 err = 0; 2132 break; 2133 } 2134 } 2135 read_unlock_bh(&idev->lock); 2136 } 2137 rcu_read_unlock(); 2138 if (err) 2139 pr_err("ERROR: IPv6 link address not available\n"); 2140 } 2141 } else { 2142 if (pkt_dev->min_pkt_size == 0) { 2143 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2144 + sizeof(struct udphdr) 2145 + sizeof(struct pktgen_hdr) 2146 + pkt_dev->pkt_overhead; 2147 } 2148 2149 pkt_dev->saddr_min = 0; 2150 pkt_dev->saddr_max = 0; 2151 if (strlen(pkt_dev->src_min) == 0) { 2152 2153 struct in_device *in_dev; 2154 2155 rcu_read_lock(); 2156 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2157 if (in_dev) { 2158 if (in_dev->ifa_list) { 2159 pkt_dev->saddr_min = 2160 in_dev->ifa_list->ifa_address; 2161 pkt_dev->saddr_max = pkt_dev->saddr_min; 2162 } 2163 } 2164 rcu_read_unlock(); 2165 } else { 2166 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2167 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2168 } 2169 2170 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2171 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2172 } 2173 /* Initialize current values. */ 2174 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2175 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2176 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2177 2178 pkt_dev->cur_dst_mac_offset = 0; 2179 pkt_dev->cur_src_mac_offset = 0; 2180 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2181 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2182 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2183 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2184 pkt_dev->nflows = 0; 2185 } 2186 2187 2188 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2189 { 2190 ktime_t start_time, end_time; 2191 s64 remaining; 2192 struct hrtimer_sleeper t; 2193 2194 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2195 hrtimer_set_expires(&t.timer, spin_until); 2196 2197 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2198 if (remaining <= 0) { 2199 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2200 return; 2201 } 2202 2203 start_time = ktime_get(); 2204 if (remaining < 100000) { 2205 /* for small delays (<100us), just loop until limit is reached */ 2206 do { 2207 end_time = ktime_get(); 2208 } while (ktime_compare(end_time, spin_until) < 0); 2209 } else { 2210 /* see do_nanosleep */ 2211 hrtimer_init_sleeper(&t, current); 2212 do { 2213 set_current_state(TASK_INTERRUPTIBLE); 2214 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2215 if (!hrtimer_active(&t.timer)) 2216 t.task = NULL; 2217 2218 if (likely(t.task)) 2219 schedule(); 2220 2221 hrtimer_cancel(&t.timer); 2222 } while (t.task && pkt_dev->running && !signal_pending(current)); 2223 __set_current_state(TASK_RUNNING); 2224 end_time = ktime_get(); 2225 } 2226 2227 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2228 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2229 } 2230 2231 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2232 { 2233 pkt_dev->pkt_overhead = 0; 2234 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2235 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2236 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2237 } 2238 2239 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2240 { 2241 return !!(pkt_dev->flows[flow].flags & F_INIT); 2242 } 2243 2244 static inline int f_pick(struct pktgen_dev *pkt_dev) 2245 { 2246 int flow = pkt_dev->curfl; 2247 2248 if (pkt_dev->flags & F_FLOW_SEQ) { 2249 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2250 /* reset time */ 2251 pkt_dev->flows[flow].count = 0; 2252 pkt_dev->flows[flow].flags = 0; 2253 pkt_dev->curfl += 1; 2254 if (pkt_dev->curfl >= pkt_dev->cflows) 2255 pkt_dev->curfl = 0; /*reset */ 2256 } 2257 } else { 2258 flow = prandom_u32() % pkt_dev->cflows; 2259 pkt_dev->curfl = flow; 2260 2261 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2262 pkt_dev->flows[flow].count = 0; 2263 pkt_dev->flows[flow].flags = 0; 2264 } 2265 } 2266 2267 return pkt_dev->curfl; 2268 } 2269 2270 2271 #ifdef CONFIG_XFRM 2272 /* If there was already an IPSEC SA, we keep it as is, else 2273 * we go look for it ... 2274 */ 2275 #define DUMMY_MARK 0 2276 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2277 { 2278 struct xfrm_state *x = pkt_dev->flows[flow].x; 2279 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2280 if (!x) { 2281 2282 if (pkt_dev->spi) { 2283 /* We need as quick as possible to find the right SA 2284 * Searching with minimum criteria to archieve this. 2285 */ 2286 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); 2287 } else { 2288 /* slow path: we dont already have xfrm_state */ 2289 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2290 (xfrm_address_t *)&pkt_dev->cur_daddr, 2291 (xfrm_address_t *)&pkt_dev->cur_saddr, 2292 AF_INET, 2293 pkt_dev->ipsmode, 2294 pkt_dev->ipsproto, 0); 2295 } 2296 if (x) { 2297 pkt_dev->flows[flow].x = x; 2298 set_pkt_overhead(pkt_dev); 2299 pkt_dev->pkt_overhead += x->props.header_len; 2300 } 2301 2302 } 2303 } 2304 #endif 2305 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2306 { 2307 2308 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2309 pkt_dev->cur_queue_map = smp_processor_id(); 2310 2311 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2312 __u16 t; 2313 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2314 t = prandom_u32() % 2315 (pkt_dev->queue_map_max - 2316 pkt_dev->queue_map_min + 1) 2317 + pkt_dev->queue_map_min; 2318 } else { 2319 t = pkt_dev->cur_queue_map + 1; 2320 if (t > pkt_dev->queue_map_max) 2321 t = pkt_dev->queue_map_min; 2322 } 2323 pkt_dev->cur_queue_map = t; 2324 } 2325 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2326 } 2327 2328 /* Increment/randomize headers according to flags and current values 2329 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2330 */ 2331 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2332 { 2333 __u32 imn; 2334 __u32 imx; 2335 int flow = 0; 2336 2337 if (pkt_dev->cflows) 2338 flow = f_pick(pkt_dev); 2339 2340 /* Deal with source MAC */ 2341 if (pkt_dev->src_mac_count > 1) { 2342 __u32 mc; 2343 __u32 tmp; 2344 2345 if (pkt_dev->flags & F_MACSRC_RND) 2346 mc = prandom_u32() % pkt_dev->src_mac_count; 2347 else { 2348 mc = pkt_dev->cur_src_mac_offset++; 2349 if (pkt_dev->cur_src_mac_offset >= 2350 pkt_dev->src_mac_count) 2351 pkt_dev->cur_src_mac_offset = 0; 2352 } 2353 2354 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2355 pkt_dev->hh[11] = tmp; 2356 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2357 pkt_dev->hh[10] = tmp; 2358 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2359 pkt_dev->hh[9] = tmp; 2360 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2361 pkt_dev->hh[8] = tmp; 2362 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2363 pkt_dev->hh[7] = tmp; 2364 } 2365 2366 /* Deal with Destination MAC */ 2367 if (pkt_dev->dst_mac_count > 1) { 2368 __u32 mc; 2369 __u32 tmp; 2370 2371 if (pkt_dev->flags & F_MACDST_RND) 2372 mc = prandom_u32() % pkt_dev->dst_mac_count; 2373 2374 else { 2375 mc = pkt_dev->cur_dst_mac_offset++; 2376 if (pkt_dev->cur_dst_mac_offset >= 2377 pkt_dev->dst_mac_count) { 2378 pkt_dev->cur_dst_mac_offset = 0; 2379 } 2380 } 2381 2382 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2383 pkt_dev->hh[5] = tmp; 2384 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2385 pkt_dev->hh[4] = tmp; 2386 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2387 pkt_dev->hh[3] = tmp; 2388 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2389 pkt_dev->hh[2] = tmp; 2390 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2391 pkt_dev->hh[1] = tmp; 2392 } 2393 2394 if (pkt_dev->flags & F_MPLS_RND) { 2395 unsigned int i; 2396 for (i = 0; i < pkt_dev->nr_labels; i++) 2397 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2398 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2399 ((__force __be32)prandom_u32() & 2400 htonl(0x000fffff)); 2401 } 2402 2403 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2404 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2405 } 2406 2407 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2408 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2409 } 2410 2411 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2412 if (pkt_dev->flags & F_UDPSRC_RND) 2413 pkt_dev->cur_udp_src = prandom_u32() % 2414 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2415 + pkt_dev->udp_src_min; 2416 2417 else { 2418 pkt_dev->cur_udp_src++; 2419 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2420 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2421 } 2422 } 2423 2424 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2425 if (pkt_dev->flags & F_UDPDST_RND) { 2426 pkt_dev->cur_udp_dst = prandom_u32() % 2427 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2428 + pkt_dev->udp_dst_min; 2429 } else { 2430 pkt_dev->cur_udp_dst++; 2431 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2432 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2433 } 2434 } 2435 2436 if (!(pkt_dev->flags & F_IPV6)) { 2437 2438 imn = ntohl(pkt_dev->saddr_min); 2439 imx = ntohl(pkt_dev->saddr_max); 2440 if (imn < imx) { 2441 __u32 t; 2442 if (pkt_dev->flags & F_IPSRC_RND) 2443 t = prandom_u32() % (imx - imn) + imn; 2444 else { 2445 t = ntohl(pkt_dev->cur_saddr); 2446 t++; 2447 if (t > imx) 2448 t = imn; 2449 2450 } 2451 pkt_dev->cur_saddr = htonl(t); 2452 } 2453 2454 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2455 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2456 } else { 2457 imn = ntohl(pkt_dev->daddr_min); 2458 imx = ntohl(pkt_dev->daddr_max); 2459 if (imn < imx) { 2460 __u32 t; 2461 __be32 s; 2462 if (pkt_dev->flags & F_IPDST_RND) { 2463 2464 do { 2465 t = prandom_u32() % 2466 (imx - imn) + imn; 2467 s = htonl(t); 2468 } while (ipv4_is_loopback(s) || 2469 ipv4_is_multicast(s) || 2470 ipv4_is_lbcast(s) || 2471 ipv4_is_zeronet(s) || 2472 ipv4_is_local_multicast(s)); 2473 pkt_dev->cur_daddr = s; 2474 } else { 2475 t = ntohl(pkt_dev->cur_daddr); 2476 t++; 2477 if (t > imx) { 2478 t = imn; 2479 } 2480 pkt_dev->cur_daddr = htonl(t); 2481 } 2482 } 2483 if (pkt_dev->cflows) { 2484 pkt_dev->flows[flow].flags |= F_INIT; 2485 pkt_dev->flows[flow].cur_daddr = 2486 pkt_dev->cur_daddr; 2487 #ifdef CONFIG_XFRM 2488 if (pkt_dev->flags & F_IPSEC_ON) 2489 get_ipsec_sa(pkt_dev, flow); 2490 #endif 2491 pkt_dev->nflows++; 2492 } 2493 } 2494 } else { /* IPV6 * */ 2495 2496 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2497 int i; 2498 2499 /* Only random destinations yet */ 2500 2501 for (i = 0; i < 4; i++) { 2502 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2503 (((__force __be32)prandom_u32() | 2504 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2505 pkt_dev->max_in6_daddr.s6_addr32[i]); 2506 } 2507 } 2508 } 2509 2510 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2511 __u32 t; 2512 if (pkt_dev->flags & F_TXSIZE_RND) { 2513 t = prandom_u32() % 2514 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2515 + pkt_dev->min_pkt_size; 2516 } else { 2517 t = pkt_dev->cur_pkt_size + 1; 2518 if (t > pkt_dev->max_pkt_size) 2519 t = pkt_dev->min_pkt_size; 2520 } 2521 pkt_dev->cur_pkt_size = t; 2522 } 2523 2524 set_cur_queue_map(pkt_dev); 2525 2526 pkt_dev->flows[flow].count++; 2527 } 2528 2529 2530 #ifdef CONFIG_XFRM 2531 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { 2532 2533 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ 2534 }; 2535 2536 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2537 { 2538 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2539 int err = 0; 2540 struct net *net = dev_net(pkt_dev->odev); 2541 2542 if (!x) 2543 return 0; 2544 /* XXX: we dont support tunnel mode for now until 2545 * we resolve the dst issue */ 2546 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) 2547 return 0; 2548 2549 /* But when user specify an valid SPI, transformation 2550 * supports both transport/tunnel mode + ESP/AH type. 2551 */ 2552 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) 2553 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; 2554 2555 rcu_read_lock_bh(); 2556 err = x->outer_mode->output(x, skb); 2557 rcu_read_unlock_bh(); 2558 if (err) { 2559 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); 2560 goto error; 2561 } 2562 err = x->type->output(x, skb); 2563 if (err) { 2564 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); 2565 goto error; 2566 } 2567 spin_lock_bh(&x->lock); 2568 x->curlft.bytes += skb->len; 2569 x->curlft.packets++; 2570 spin_unlock_bh(&x->lock); 2571 error: 2572 return err; 2573 } 2574 2575 static void free_SAs(struct pktgen_dev *pkt_dev) 2576 { 2577 if (pkt_dev->cflows) { 2578 /* let go of the SAs if we have them */ 2579 int i; 2580 for (i = 0; i < pkt_dev->cflows; i++) { 2581 struct xfrm_state *x = pkt_dev->flows[i].x; 2582 if (x) { 2583 xfrm_state_put(x); 2584 pkt_dev->flows[i].x = NULL; 2585 } 2586 } 2587 } 2588 } 2589 2590 static int process_ipsec(struct pktgen_dev *pkt_dev, 2591 struct sk_buff *skb, __be16 protocol) 2592 { 2593 if (pkt_dev->flags & F_IPSEC_ON) { 2594 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2595 int nhead = 0; 2596 if (x) { 2597 int ret; 2598 __u8 *eth; 2599 struct iphdr *iph; 2600 2601 nhead = x->props.header_len - skb_headroom(skb); 2602 if (nhead > 0) { 2603 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2604 if (ret < 0) { 2605 pr_err("Error expanding ipsec packet %d\n", 2606 ret); 2607 goto err; 2608 } 2609 } 2610 2611 /* ipsec is not expecting ll header */ 2612 skb_pull(skb, ETH_HLEN); 2613 ret = pktgen_output_ipsec(skb, pkt_dev); 2614 if (ret) { 2615 pr_err("Error creating ipsec packet %d\n", ret); 2616 goto err; 2617 } 2618 /* restore ll */ 2619 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2620 memcpy(eth, pkt_dev->hh, 12); 2621 *(u16 *) ð[12] = protocol; 2622 2623 /* Update IPv4 header len as well as checksum value */ 2624 iph = ip_hdr(skb); 2625 iph->tot_len = htons(skb->len - ETH_HLEN); 2626 ip_send_check(iph); 2627 } 2628 } 2629 return 1; 2630 err: 2631 kfree_skb(skb); 2632 return 0; 2633 } 2634 #endif 2635 2636 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2637 { 2638 unsigned int i; 2639 for (i = 0; i < pkt_dev->nr_labels; i++) 2640 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2641 2642 mpls--; 2643 *mpls |= MPLS_STACK_BOTTOM; 2644 } 2645 2646 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2647 unsigned int prio) 2648 { 2649 return htons(id | (cfi << 12) | (prio << 13)); 2650 } 2651 2652 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2653 int datalen) 2654 { 2655 struct timeval timestamp; 2656 struct pktgen_hdr *pgh; 2657 2658 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2659 datalen -= sizeof(*pgh); 2660 2661 if (pkt_dev->nfrags <= 0) { 2662 memset(skb_put(skb, datalen), 0, datalen); 2663 } else { 2664 int frags = pkt_dev->nfrags; 2665 int i, len; 2666 int frag_len; 2667 2668 2669 if (frags > MAX_SKB_FRAGS) 2670 frags = MAX_SKB_FRAGS; 2671 len = datalen - frags * PAGE_SIZE; 2672 if (len > 0) { 2673 memset(skb_put(skb, len), 0, len); 2674 datalen = frags * PAGE_SIZE; 2675 } 2676 2677 i = 0; 2678 frag_len = (datalen/frags) < PAGE_SIZE ? 2679 (datalen/frags) : PAGE_SIZE; 2680 while (datalen > 0) { 2681 if (unlikely(!pkt_dev->page)) { 2682 int node = numa_node_id(); 2683 2684 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2685 node = pkt_dev->node; 2686 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2687 if (!pkt_dev->page) 2688 break; 2689 } 2690 get_page(pkt_dev->page); 2691 skb_frag_set_page(skb, i, pkt_dev->page); 2692 skb_shinfo(skb)->frags[i].page_offset = 0; 2693 /*last fragment, fill rest of data*/ 2694 if (i == (frags - 1)) 2695 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2696 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2697 else 2698 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2699 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2700 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2701 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2702 i++; 2703 skb_shinfo(skb)->nr_frags = i; 2704 } 2705 } 2706 2707 /* Stamp the time, and sequence number, 2708 * convert them to network byte order 2709 */ 2710 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2711 pgh->seq_num = htonl(pkt_dev->seq_num); 2712 2713 if (pkt_dev->flags & F_NO_TIMESTAMP) { 2714 pgh->tv_sec = 0; 2715 pgh->tv_usec = 0; 2716 } else { 2717 do_gettimeofday(×tamp); 2718 pgh->tv_sec = htonl(timestamp.tv_sec); 2719 pgh->tv_usec = htonl(timestamp.tv_usec); 2720 } 2721 } 2722 2723 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2724 struct pktgen_dev *pkt_dev, 2725 unsigned int extralen) 2726 { 2727 struct sk_buff *skb = NULL; 2728 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2729 pkt_dev->pkt_overhead; 2730 2731 if (pkt_dev->flags & F_NODE) { 2732 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2733 2734 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2735 if (likely(skb)) { 2736 skb_reserve(skb, NET_SKB_PAD); 2737 skb->dev = dev; 2738 } 2739 } else { 2740 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2741 } 2742 2743 return skb; 2744 } 2745 2746 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2747 struct pktgen_dev *pkt_dev) 2748 { 2749 struct sk_buff *skb = NULL; 2750 __u8 *eth; 2751 struct udphdr *udph; 2752 int datalen, iplen; 2753 struct iphdr *iph; 2754 __be16 protocol = htons(ETH_P_IP); 2755 __be32 *mpls; 2756 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2757 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2758 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2759 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2760 u16 queue_map; 2761 2762 if (pkt_dev->nr_labels) 2763 protocol = htons(ETH_P_MPLS_UC); 2764 2765 if (pkt_dev->vlan_id != 0xffff) 2766 protocol = htons(ETH_P_8021Q); 2767 2768 /* Update any of the values, used when we're incrementing various 2769 * fields. 2770 */ 2771 mod_cur_headers(pkt_dev); 2772 queue_map = pkt_dev->cur_queue_map; 2773 2774 datalen = (odev->hard_header_len + 16) & ~0xf; 2775 2776 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2777 if (!skb) { 2778 sprintf(pkt_dev->result, "No memory"); 2779 return NULL; 2780 } 2781 2782 prefetchw(skb->data); 2783 skb_reserve(skb, datalen); 2784 2785 /* Reserve for ethernet and IP header */ 2786 eth = (__u8 *) skb_push(skb, 14); 2787 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2788 if (pkt_dev->nr_labels) 2789 mpls_push(mpls, pkt_dev); 2790 2791 if (pkt_dev->vlan_id != 0xffff) { 2792 if (pkt_dev->svlan_id != 0xffff) { 2793 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2794 *svlan_tci = build_tci(pkt_dev->svlan_id, 2795 pkt_dev->svlan_cfi, 2796 pkt_dev->svlan_p); 2797 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2798 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2799 } 2800 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2801 *vlan_tci = build_tci(pkt_dev->vlan_id, 2802 pkt_dev->vlan_cfi, 2803 pkt_dev->vlan_p); 2804 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2805 *vlan_encapsulated_proto = htons(ETH_P_IP); 2806 } 2807 2808 skb_set_mac_header(skb, 0); 2809 skb_set_network_header(skb, skb->len); 2810 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2811 2812 skb_set_transport_header(skb, skb->len); 2813 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2814 skb_set_queue_mapping(skb, queue_map); 2815 skb->priority = pkt_dev->skb_priority; 2816 2817 memcpy(eth, pkt_dev->hh, 12); 2818 *(__be16 *) & eth[12] = protocol; 2819 2820 /* Eth + IPh + UDPh + mpls */ 2821 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2822 pkt_dev->pkt_overhead; 2823 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2824 datalen = sizeof(struct pktgen_hdr); 2825 2826 udph->source = htons(pkt_dev->cur_udp_src); 2827 udph->dest = htons(pkt_dev->cur_udp_dst); 2828 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2829 udph->check = 0; 2830 2831 iph->ihl = 5; 2832 iph->version = 4; 2833 iph->ttl = 32; 2834 iph->tos = pkt_dev->tos; 2835 iph->protocol = IPPROTO_UDP; /* UDP */ 2836 iph->saddr = pkt_dev->cur_saddr; 2837 iph->daddr = pkt_dev->cur_daddr; 2838 iph->id = htons(pkt_dev->ip_id); 2839 pkt_dev->ip_id++; 2840 iph->frag_off = 0; 2841 iplen = 20 + 8 + datalen; 2842 iph->tot_len = htons(iplen); 2843 ip_send_check(iph); 2844 skb->protocol = protocol; 2845 skb->dev = odev; 2846 skb->pkt_type = PACKET_HOST; 2847 2848 pktgen_finalize_skb(pkt_dev, skb, datalen); 2849 2850 if (!(pkt_dev->flags & F_UDPCSUM)) { 2851 skb->ip_summed = CHECKSUM_NONE; 2852 } else if (odev->features & NETIF_F_V4_CSUM) { 2853 skb->ip_summed = CHECKSUM_PARTIAL; 2854 skb->csum = 0; 2855 udp4_hwcsum(skb, iph->saddr, iph->daddr); 2856 } else { 2857 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); 2858 2859 /* add protocol-dependent pseudo-header */ 2860 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, 2861 datalen + 8, IPPROTO_UDP, csum); 2862 2863 if (udph->check == 0) 2864 udph->check = CSUM_MANGLED_0; 2865 } 2866 2867 #ifdef CONFIG_XFRM 2868 if (!process_ipsec(pkt_dev, skb, protocol)) 2869 return NULL; 2870 #endif 2871 2872 return skb; 2873 } 2874 2875 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2876 struct pktgen_dev *pkt_dev) 2877 { 2878 struct sk_buff *skb = NULL; 2879 __u8 *eth; 2880 struct udphdr *udph; 2881 int datalen, udplen; 2882 struct ipv6hdr *iph; 2883 __be16 protocol = htons(ETH_P_IPV6); 2884 __be32 *mpls; 2885 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2886 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2887 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2888 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2889 u16 queue_map; 2890 2891 if (pkt_dev->nr_labels) 2892 protocol = htons(ETH_P_MPLS_UC); 2893 2894 if (pkt_dev->vlan_id != 0xffff) 2895 protocol = htons(ETH_P_8021Q); 2896 2897 /* Update any of the values, used when we're incrementing various 2898 * fields. 2899 */ 2900 mod_cur_headers(pkt_dev); 2901 queue_map = pkt_dev->cur_queue_map; 2902 2903 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2904 if (!skb) { 2905 sprintf(pkt_dev->result, "No memory"); 2906 return NULL; 2907 } 2908 2909 prefetchw(skb->data); 2910 skb_reserve(skb, 16); 2911 2912 /* Reserve for ethernet and IP header */ 2913 eth = (__u8 *) skb_push(skb, 14); 2914 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2915 if (pkt_dev->nr_labels) 2916 mpls_push(mpls, pkt_dev); 2917 2918 if (pkt_dev->vlan_id != 0xffff) { 2919 if (pkt_dev->svlan_id != 0xffff) { 2920 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2921 *svlan_tci = build_tci(pkt_dev->svlan_id, 2922 pkt_dev->svlan_cfi, 2923 pkt_dev->svlan_p); 2924 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2925 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2926 } 2927 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2928 *vlan_tci = build_tci(pkt_dev->vlan_id, 2929 pkt_dev->vlan_cfi, 2930 pkt_dev->vlan_p); 2931 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2932 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2933 } 2934 2935 skb_set_mac_header(skb, 0); 2936 skb_set_network_header(skb, skb->len); 2937 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2938 2939 skb_set_transport_header(skb, skb->len); 2940 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2941 skb_set_queue_mapping(skb, queue_map); 2942 skb->priority = pkt_dev->skb_priority; 2943 2944 memcpy(eth, pkt_dev->hh, 12); 2945 *(__be16 *) ð[12] = protocol; 2946 2947 /* Eth + IPh + UDPh + mpls */ 2948 datalen = pkt_dev->cur_pkt_size - 14 - 2949 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2950 pkt_dev->pkt_overhead; 2951 2952 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2953 datalen = sizeof(struct pktgen_hdr); 2954 net_info_ratelimited("increased datalen to %d\n", datalen); 2955 } 2956 2957 udplen = datalen + sizeof(struct udphdr); 2958 udph->source = htons(pkt_dev->cur_udp_src); 2959 udph->dest = htons(pkt_dev->cur_udp_dst); 2960 udph->len = htons(udplen); 2961 udph->check = 0; 2962 2963 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2964 2965 if (pkt_dev->traffic_class) { 2966 /* Version + traffic class + flow (0) */ 2967 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2968 } 2969 2970 iph->hop_limit = 32; 2971 2972 iph->payload_len = htons(udplen); 2973 iph->nexthdr = IPPROTO_UDP; 2974 2975 iph->daddr = pkt_dev->cur_in6_daddr; 2976 iph->saddr = pkt_dev->cur_in6_saddr; 2977 2978 skb->protocol = protocol; 2979 skb->dev = odev; 2980 skb->pkt_type = PACKET_HOST; 2981 2982 pktgen_finalize_skb(pkt_dev, skb, datalen); 2983 2984 if (!(pkt_dev->flags & F_UDPCSUM)) { 2985 skb->ip_summed = CHECKSUM_NONE; 2986 } else if (odev->features & NETIF_F_V6_CSUM) { 2987 skb->ip_summed = CHECKSUM_PARTIAL; 2988 skb->csum_start = skb_transport_header(skb) - skb->head; 2989 skb->csum_offset = offsetof(struct udphdr, check); 2990 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 2991 } else { 2992 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); 2993 2994 /* add protocol-dependent pseudo-header */ 2995 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 2996 2997 if (udph->check == 0) 2998 udph->check = CSUM_MANGLED_0; 2999 } 3000 3001 return skb; 3002 } 3003 3004 static struct sk_buff *fill_packet(struct net_device *odev, 3005 struct pktgen_dev *pkt_dev) 3006 { 3007 if (pkt_dev->flags & F_IPV6) 3008 return fill_packet_ipv6(odev, pkt_dev); 3009 else 3010 return fill_packet_ipv4(odev, pkt_dev); 3011 } 3012 3013 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3014 { 3015 pkt_dev->seq_num = 1; 3016 pkt_dev->idle_acc = 0; 3017 pkt_dev->sofar = 0; 3018 pkt_dev->tx_bytes = 0; 3019 pkt_dev->errors = 0; 3020 } 3021 3022 /* Set up structure for sending pkts, clear counters */ 3023 3024 static void pktgen_run(struct pktgen_thread *t) 3025 { 3026 struct pktgen_dev *pkt_dev; 3027 int started = 0; 3028 3029 func_enter(); 3030 3031 rcu_read_lock(); 3032 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3033 3034 /* 3035 * setup odev and create initial packet. 3036 */ 3037 pktgen_setup_inject(pkt_dev); 3038 3039 if (pkt_dev->odev) { 3040 pktgen_clear_counters(pkt_dev); 3041 pkt_dev->skb = NULL; 3042 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3043 3044 set_pkt_overhead(pkt_dev); 3045 3046 strcpy(pkt_dev->result, "Starting"); 3047 pkt_dev->running = 1; /* Cranke yeself! */ 3048 started++; 3049 } else 3050 strcpy(pkt_dev->result, "Error starting"); 3051 } 3052 rcu_read_unlock(); 3053 if (started) 3054 t->control &= ~(T_STOP); 3055 } 3056 3057 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 3058 { 3059 struct pktgen_thread *t; 3060 3061 func_enter(); 3062 3063 mutex_lock(&pktgen_thread_lock); 3064 3065 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3066 t->control |= T_STOP; 3067 3068 mutex_unlock(&pktgen_thread_lock); 3069 } 3070 3071 static int thread_is_running(const struct pktgen_thread *t) 3072 { 3073 const struct pktgen_dev *pkt_dev; 3074 3075 rcu_read_lock(); 3076 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 3077 if (pkt_dev->running) { 3078 rcu_read_unlock(); 3079 return 1; 3080 } 3081 rcu_read_unlock(); 3082 return 0; 3083 } 3084 3085 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3086 { 3087 while (thread_is_running(t)) { 3088 3089 msleep_interruptible(100); 3090 3091 if (signal_pending(current)) 3092 goto signal; 3093 } 3094 return 1; 3095 signal: 3096 return 0; 3097 } 3098 3099 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3100 { 3101 struct pktgen_thread *t; 3102 int sig = 1; 3103 3104 mutex_lock(&pktgen_thread_lock); 3105 3106 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3107 sig = pktgen_wait_thread_run(t); 3108 if (sig == 0) 3109 break; 3110 } 3111 3112 if (sig == 0) 3113 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3114 t->control |= (T_STOP); 3115 3116 mutex_unlock(&pktgen_thread_lock); 3117 return sig; 3118 } 3119 3120 static void pktgen_run_all_threads(struct pktgen_net *pn) 3121 { 3122 struct pktgen_thread *t; 3123 3124 func_enter(); 3125 3126 mutex_lock(&pktgen_thread_lock); 3127 3128 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3129 t->control |= (T_RUN); 3130 3131 mutex_unlock(&pktgen_thread_lock); 3132 3133 /* Propagate thread->control */ 3134 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3135 3136 pktgen_wait_all_threads_run(pn); 3137 } 3138 3139 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3140 { 3141 struct pktgen_thread *t; 3142 3143 func_enter(); 3144 3145 mutex_lock(&pktgen_thread_lock); 3146 3147 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3148 t->control |= (T_REMDEVALL); 3149 3150 mutex_unlock(&pktgen_thread_lock); 3151 3152 /* Propagate thread->control */ 3153 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3154 3155 pktgen_wait_all_threads_run(pn); 3156 } 3157 3158 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3159 { 3160 __u64 bps, mbps, pps; 3161 char *p = pkt_dev->result; 3162 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3163 pkt_dev->started_at); 3164 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3165 3166 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3167 (unsigned long long)ktime_to_us(elapsed), 3168 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3169 (unsigned long long)ktime_to_us(idle), 3170 (unsigned long long)pkt_dev->sofar, 3171 pkt_dev->cur_pkt_size, nr_frags); 3172 3173 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3174 ktime_to_ns(elapsed)); 3175 3176 bps = pps * 8 * pkt_dev->cur_pkt_size; 3177 3178 mbps = bps; 3179 do_div(mbps, 1000000); 3180 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3181 (unsigned long long)pps, 3182 (unsigned long long)mbps, 3183 (unsigned long long)bps, 3184 (unsigned long long)pkt_dev->errors); 3185 } 3186 3187 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3188 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3189 { 3190 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3191 3192 if (!pkt_dev->running) { 3193 pr_warn("interface: %s is already stopped\n", 3194 pkt_dev->odevname); 3195 return -EINVAL; 3196 } 3197 3198 pkt_dev->running = 0; 3199 kfree_skb(pkt_dev->skb); 3200 pkt_dev->skb = NULL; 3201 pkt_dev->stopped_at = ktime_get(); 3202 3203 show_results(pkt_dev, nr_frags); 3204 3205 return 0; 3206 } 3207 3208 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3209 { 3210 struct pktgen_dev *pkt_dev, *best = NULL; 3211 3212 rcu_read_lock(); 3213 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3214 if (!pkt_dev->running) 3215 continue; 3216 if (best == NULL) 3217 best = pkt_dev; 3218 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3219 best = pkt_dev; 3220 } 3221 rcu_read_unlock(); 3222 3223 return best; 3224 } 3225 3226 static void pktgen_stop(struct pktgen_thread *t) 3227 { 3228 struct pktgen_dev *pkt_dev; 3229 3230 func_enter(); 3231 3232 rcu_read_lock(); 3233 3234 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3235 pktgen_stop_device(pkt_dev); 3236 } 3237 3238 rcu_read_unlock(); 3239 } 3240 3241 /* 3242 * one of our devices needs to be removed - find it 3243 * and remove it 3244 */ 3245 static void pktgen_rem_one_if(struct pktgen_thread *t) 3246 { 3247 struct list_head *q, *n; 3248 struct pktgen_dev *cur; 3249 3250 func_enter(); 3251 3252 list_for_each_safe(q, n, &t->if_list) { 3253 cur = list_entry(q, struct pktgen_dev, list); 3254 3255 if (!cur->removal_mark) 3256 continue; 3257 3258 kfree_skb(cur->skb); 3259 cur->skb = NULL; 3260 3261 pktgen_remove_device(t, cur); 3262 3263 break; 3264 } 3265 } 3266 3267 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3268 { 3269 struct list_head *q, *n; 3270 struct pktgen_dev *cur; 3271 3272 func_enter(); 3273 3274 /* Remove all devices, free mem */ 3275 3276 list_for_each_safe(q, n, &t->if_list) { 3277 cur = list_entry(q, struct pktgen_dev, list); 3278 3279 kfree_skb(cur->skb); 3280 cur->skb = NULL; 3281 3282 pktgen_remove_device(t, cur); 3283 } 3284 } 3285 3286 static void pktgen_rem_thread(struct pktgen_thread *t) 3287 { 3288 /* Remove from the thread list */ 3289 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3290 } 3291 3292 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3293 { 3294 ktime_t idle_start = ktime_get(); 3295 schedule(); 3296 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3297 } 3298 3299 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3300 { 3301 ktime_t idle_start = ktime_get(); 3302 3303 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3304 if (signal_pending(current)) 3305 break; 3306 3307 if (need_resched()) 3308 pktgen_resched(pkt_dev); 3309 else 3310 cpu_relax(); 3311 } 3312 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3313 } 3314 3315 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3316 { 3317 unsigned int burst = ACCESS_ONCE(pkt_dev->burst); 3318 struct net_device *odev = pkt_dev->odev; 3319 struct netdev_queue *txq; 3320 int ret; 3321 3322 /* If device is offline, then don't send */ 3323 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3324 pktgen_stop_device(pkt_dev); 3325 return; 3326 } 3327 3328 /* This is max DELAY, this has special meaning of 3329 * "never transmit" 3330 */ 3331 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3332 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3333 return; 3334 } 3335 3336 /* If no skb or clone count exhausted then get new one */ 3337 if (!pkt_dev->skb || (pkt_dev->last_ok && 3338 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3339 /* build a new pkt */ 3340 kfree_skb(pkt_dev->skb); 3341 3342 pkt_dev->skb = fill_packet(odev, pkt_dev); 3343 if (pkt_dev->skb == NULL) { 3344 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3345 schedule(); 3346 pkt_dev->clone_count--; /* back out increment, OOM */ 3347 return; 3348 } 3349 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3350 pkt_dev->allocated_skbs++; 3351 pkt_dev->clone_count = 0; /* reset counter */ 3352 } 3353 3354 if (pkt_dev->delay && pkt_dev->last_ok) 3355 spin(pkt_dev, pkt_dev->next_tx); 3356 3357 txq = skb_get_tx_queue(odev, pkt_dev->skb); 3358 3359 local_bh_disable(); 3360 3361 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3362 3363 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3364 ret = NETDEV_TX_BUSY; 3365 pkt_dev->last_ok = 0; 3366 goto unlock; 3367 } 3368 atomic_add(burst, &pkt_dev->skb->users); 3369 3370 xmit_more: 3371 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); 3372 3373 switch (ret) { 3374 case NETDEV_TX_OK: 3375 pkt_dev->last_ok = 1; 3376 pkt_dev->sofar++; 3377 pkt_dev->seq_num++; 3378 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3379 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) 3380 goto xmit_more; 3381 break; 3382 case NET_XMIT_DROP: 3383 case NET_XMIT_CN: 3384 case NET_XMIT_POLICED: 3385 /* skb has been consumed */ 3386 pkt_dev->errors++; 3387 break; 3388 default: /* Drivers are not supposed to return other values! */ 3389 net_info_ratelimited("%s xmit error: %d\n", 3390 pkt_dev->odevname, ret); 3391 pkt_dev->errors++; 3392 /* fallthru */ 3393 case NETDEV_TX_LOCKED: 3394 case NETDEV_TX_BUSY: 3395 /* Retry it next time */ 3396 atomic_dec(&(pkt_dev->skb->users)); 3397 pkt_dev->last_ok = 0; 3398 } 3399 if (unlikely(burst)) 3400 atomic_sub(burst, &pkt_dev->skb->users); 3401 unlock: 3402 HARD_TX_UNLOCK(odev, txq); 3403 3404 local_bh_enable(); 3405 3406 /* If pkt_dev->count is zero, then run forever */ 3407 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3408 pktgen_wait_for_skb(pkt_dev); 3409 3410 /* Done with this */ 3411 pktgen_stop_device(pkt_dev); 3412 } 3413 } 3414 3415 /* 3416 * Main loop of the thread goes here 3417 */ 3418 3419 static int pktgen_thread_worker(void *arg) 3420 { 3421 DEFINE_WAIT(wait); 3422 struct pktgen_thread *t = arg; 3423 struct pktgen_dev *pkt_dev = NULL; 3424 int cpu = t->cpu; 3425 3426 BUG_ON(smp_processor_id() != cpu); 3427 3428 init_waitqueue_head(&t->queue); 3429 complete(&t->start_done); 3430 3431 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3432 3433 set_freezable(); 3434 3435 __set_current_state(TASK_RUNNING); 3436 3437 while (!kthread_should_stop()) { 3438 pkt_dev = next_to_run(t); 3439 3440 if (unlikely(!pkt_dev && t->control == 0)) { 3441 if (t->net->pktgen_exiting) 3442 break; 3443 wait_event_interruptible_timeout(t->queue, 3444 t->control != 0, 3445 HZ/10); 3446 try_to_freeze(); 3447 continue; 3448 } 3449 3450 if (likely(pkt_dev)) { 3451 pktgen_xmit(pkt_dev); 3452 3453 if (need_resched()) 3454 pktgen_resched(pkt_dev); 3455 else 3456 cpu_relax(); 3457 } 3458 3459 if (t->control & T_STOP) { 3460 pktgen_stop(t); 3461 t->control &= ~(T_STOP); 3462 } 3463 3464 if (t->control & T_RUN) { 3465 pktgen_run(t); 3466 t->control &= ~(T_RUN); 3467 } 3468 3469 if (t->control & T_REMDEVALL) { 3470 pktgen_rem_all_ifs(t); 3471 t->control &= ~(T_REMDEVALL); 3472 } 3473 3474 if (t->control & T_REMDEV) { 3475 pktgen_rem_one_if(t); 3476 t->control &= ~(T_REMDEV); 3477 } 3478 3479 try_to_freeze(); 3480 } 3481 set_current_state(TASK_INTERRUPTIBLE); 3482 3483 pr_debug("%s stopping all device\n", t->tsk->comm); 3484 pktgen_stop(t); 3485 3486 pr_debug("%s removing all device\n", t->tsk->comm); 3487 pktgen_rem_all_ifs(t); 3488 3489 pr_debug("%s removing thread\n", t->tsk->comm); 3490 pktgen_rem_thread(t); 3491 3492 /* Wait for kthread_stop */ 3493 while (!kthread_should_stop()) { 3494 set_current_state(TASK_INTERRUPTIBLE); 3495 schedule(); 3496 } 3497 __set_current_state(TASK_RUNNING); 3498 3499 return 0; 3500 } 3501 3502 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3503 const char *ifname, bool exact) 3504 { 3505 struct pktgen_dev *p, *pkt_dev = NULL; 3506 size_t len = strlen(ifname); 3507 3508 rcu_read_lock(); 3509 list_for_each_entry_rcu(p, &t->if_list, list) 3510 if (strncmp(p->odevname, ifname, len) == 0) { 3511 if (p->odevname[len]) { 3512 if (exact || p->odevname[len] != '@') 3513 continue; 3514 } 3515 pkt_dev = p; 3516 break; 3517 } 3518 3519 rcu_read_unlock(); 3520 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3521 return pkt_dev; 3522 } 3523 3524 /* 3525 * Adds a dev at front of if_list. 3526 */ 3527 3528 static int add_dev_to_thread(struct pktgen_thread *t, 3529 struct pktgen_dev *pkt_dev) 3530 { 3531 int rv = 0; 3532 3533 /* This function cannot be called concurrently, as its called 3534 * under pktgen_thread_lock mutex, but it can run from 3535 * userspace on another CPU than the kthread. The if_lock() 3536 * is used here to sync with concurrent instances of 3537 * _rem_dev_from_if_list() invoked via kthread, which is also 3538 * updating the if_list */ 3539 if_lock(t); 3540 3541 if (pkt_dev->pg_thread) { 3542 pr_err("ERROR: already assigned to a thread\n"); 3543 rv = -EBUSY; 3544 goto out; 3545 } 3546 3547 pkt_dev->running = 0; 3548 pkt_dev->pg_thread = t; 3549 list_add_rcu(&pkt_dev->list, &t->if_list); 3550 3551 out: 3552 if_unlock(t); 3553 return rv; 3554 } 3555 3556 /* Called under thread lock */ 3557 3558 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3559 { 3560 struct pktgen_dev *pkt_dev; 3561 int err; 3562 int node = cpu_to_node(t->cpu); 3563 3564 /* We don't allow a device to be on several threads */ 3565 3566 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3567 if (pkt_dev) { 3568 pr_err("ERROR: interface already used\n"); 3569 return -EBUSY; 3570 } 3571 3572 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3573 if (!pkt_dev) 3574 return -ENOMEM; 3575 3576 strcpy(pkt_dev->odevname, ifname); 3577 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3578 node); 3579 if (pkt_dev->flows == NULL) { 3580 kfree(pkt_dev); 3581 return -ENOMEM; 3582 } 3583 3584 pkt_dev->removal_mark = 0; 3585 pkt_dev->nfrags = 0; 3586 pkt_dev->delay = pg_delay_d; 3587 pkt_dev->count = pg_count_d; 3588 pkt_dev->sofar = 0; 3589 pkt_dev->udp_src_min = 9; /* sink port */ 3590 pkt_dev->udp_src_max = 9; 3591 pkt_dev->udp_dst_min = 9; 3592 pkt_dev->udp_dst_max = 9; 3593 pkt_dev->vlan_p = 0; 3594 pkt_dev->vlan_cfi = 0; 3595 pkt_dev->vlan_id = 0xffff; 3596 pkt_dev->svlan_p = 0; 3597 pkt_dev->svlan_cfi = 0; 3598 pkt_dev->svlan_id = 0xffff; 3599 pkt_dev->burst = 1; 3600 pkt_dev->node = -1; 3601 3602 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3603 if (err) 3604 goto out1; 3605 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3606 pkt_dev->clone_skb = pg_clone_skb_d; 3607 3608 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3609 &pktgen_if_fops, pkt_dev); 3610 if (!pkt_dev->entry) { 3611 pr_err("cannot create %s/%s procfs entry\n", 3612 PG_PROC_DIR, ifname); 3613 err = -EINVAL; 3614 goto out2; 3615 } 3616 #ifdef CONFIG_XFRM 3617 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3618 pkt_dev->ipsproto = IPPROTO_ESP; 3619 3620 /* xfrm tunnel mode needs additional dst to extract outter 3621 * ip header protocol/ttl/id field, here creat a phony one. 3622 * instead of looking for a valid rt, which definitely hurting 3623 * performance under such circumstance. 3624 */ 3625 pkt_dev->dstops.family = AF_INET; 3626 pkt_dev->dst.dev = pkt_dev->odev; 3627 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); 3628 pkt_dev->dst.child = &pkt_dev->dst; 3629 pkt_dev->dst.ops = &pkt_dev->dstops; 3630 #endif 3631 3632 return add_dev_to_thread(t, pkt_dev); 3633 out2: 3634 dev_put(pkt_dev->odev); 3635 out1: 3636 #ifdef CONFIG_XFRM 3637 free_SAs(pkt_dev); 3638 #endif 3639 vfree(pkt_dev->flows); 3640 kfree(pkt_dev); 3641 return err; 3642 } 3643 3644 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3645 { 3646 struct pktgen_thread *t; 3647 struct proc_dir_entry *pe; 3648 struct task_struct *p; 3649 3650 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3651 cpu_to_node(cpu)); 3652 if (!t) { 3653 pr_err("ERROR: out of memory, can't create new thread\n"); 3654 return -ENOMEM; 3655 } 3656 3657 spin_lock_init(&t->if_lock); 3658 t->cpu = cpu; 3659 3660 INIT_LIST_HEAD(&t->if_list); 3661 3662 list_add_tail(&t->th_list, &pn->pktgen_threads); 3663 init_completion(&t->start_done); 3664 3665 p = kthread_create_on_node(pktgen_thread_worker, 3666 t, 3667 cpu_to_node(cpu), 3668 "kpktgend_%d", cpu); 3669 if (IS_ERR(p)) { 3670 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3671 list_del(&t->th_list); 3672 kfree(t); 3673 return PTR_ERR(p); 3674 } 3675 kthread_bind(p, cpu); 3676 t->tsk = p; 3677 3678 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3679 &pktgen_thread_fops, t); 3680 if (!pe) { 3681 pr_err("cannot create %s/%s procfs entry\n", 3682 PG_PROC_DIR, t->tsk->comm); 3683 kthread_stop(p); 3684 list_del(&t->th_list); 3685 kfree(t); 3686 return -EINVAL; 3687 } 3688 3689 t->net = pn; 3690 wake_up_process(p); 3691 wait_for_completion(&t->start_done); 3692 3693 return 0; 3694 } 3695 3696 /* 3697 * Removes a device from the thread if_list. 3698 */ 3699 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3700 struct pktgen_dev *pkt_dev) 3701 { 3702 struct list_head *q, *n; 3703 struct pktgen_dev *p; 3704 3705 if_lock(t); 3706 list_for_each_safe(q, n, &t->if_list) { 3707 p = list_entry(q, struct pktgen_dev, list); 3708 if (p == pkt_dev) 3709 list_del_rcu(&p->list); 3710 } 3711 if_unlock(t); 3712 } 3713 3714 static int pktgen_remove_device(struct pktgen_thread *t, 3715 struct pktgen_dev *pkt_dev) 3716 { 3717 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3718 3719 if (pkt_dev->running) { 3720 pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); 3721 pktgen_stop_device(pkt_dev); 3722 } 3723 3724 /* Dis-associate from the interface */ 3725 3726 if (pkt_dev->odev) { 3727 dev_put(pkt_dev->odev); 3728 pkt_dev->odev = NULL; 3729 } 3730 3731 /* Remove proc before if_list entry, because add_device uses 3732 * list to determine if interface already exist, avoid race 3733 * with proc_create_data() */ 3734 proc_remove(pkt_dev->entry); 3735 3736 /* And update the thread if_list */ 3737 _rem_dev_from_if_list(t, pkt_dev); 3738 3739 #ifdef CONFIG_XFRM 3740 free_SAs(pkt_dev); 3741 #endif 3742 vfree(pkt_dev->flows); 3743 if (pkt_dev->page) 3744 put_page(pkt_dev->page); 3745 kfree_rcu(pkt_dev, rcu); 3746 return 0; 3747 } 3748 3749 static int __net_init pg_net_init(struct net *net) 3750 { 3751 struct pktgen_net *pn = net_generic(net, pg_net_id); 3752 struct proc_dir_entry *pe; 3753 int cpu, ret = 0; 3754 3755 pn->net = net; 3756 INIT_LIST_HEAD(&pn->pktgen_threads); 3757 pn->pktgen_exiting = false; 3758 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3759 if (!pn->proc_dir) { 3760 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3761 return -ENODEV; 3762 } 3763 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3764 if (pe == NULL) { 3765 pr_err("cannot create %s procfs entry\n", PGCTRL); 3766 ret = -EINVAL; 3767 goto remove; 3768 } 3769 3770 for_each_online_cpu(cpu) { 3771 int err; 3772 3773 err = pktgen_create_thread(cpu, pn); 3774 if (err) 3775 pr_warn("Cannot create thread for cpu %d (%d)\n", 3776 cpu, err); 3777 } 3778 3779 if (list_empty(&pn->pktgen_threads)) { 3780 pr_err("Initialization failed for all threads\n"); 3781 ret = -ENODEV; 3782 goto remove_entry; 3783 } 3784 3785 return 0; 3786 3787 remove_entry: 3788 remove_proc_entry(PGCTRL, pn->proc_dir); 3789 remove: 3790 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3791 return ret; 3792 } 3793 3794 static void __net_exit pg_net_exit(struct net *net) 3795 { 3796 struct pktgen_net *pn = net_generic(net, pg_net_id); 3797 struct pktgen_thread *t; 3798 struct list_head *q, *n; 3799 LIST_HEAD(list); 3800 3801 /* Stop all interfaces & threads */ 3802 pn->pktgen_exiting = true; 3803 3804 mutex_lock(&pktgen_thread_lock); 3805 list_splice_init(&pn->pktgen_threads, &list); 3806 mutex_unlock(&pktgen_thread_lock); 3807 3808 list_for_each_safe(q, n, &list) { 3809 t = list_entry(q, struct pktgen_thread, th_list); 3810 list_del(&t->th_list); 3811 kthread_stop(t->tsk); 3812 kfree(t); 3813 } 3814 3815 remove_proc_entry(PGCTRL, pn->proc_dir); 3816 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3817 } 3818 3819 static struct pernet_operations pg_net_ops = { 3820 .init = pg_net_init, 3821 .exit = pg_net_exit, 3822 .id = &pg_net_id, 3823 .size = sizeof(struct pktgen_net), 3824 }; 3825 3826 static int __init pg_init(void) 3827 { 3828 int ret = 0; 3829 3830 pr_info("%s", version); 3831 ret = register_pernet_subsys(&pg_net_ops); 3832 if (ret) 3833 return ret; 3834 ret = register_netdevice_notifier(&pktgen_notifier_block); 3835 if (ret) 3836 unregister_pernet_subsys(&pg_net_ops); 3837 3838 return ret; 3839 } 3840 3841 static void __exit pg_cleanup(void) 3842 { 3843 unregister_netdevice_notifier(&pktgen_notifier_block); 3844 unregister_pernet_subsys(&pg_net_ops); 3845 /* Don't need rcu_barrier() due to use of kfree_rcu() */ 3846 } 3847 3848 module_init(pg_init); 3849 module_exit(pg_cleanup); 3850 3851 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3852 MODULE_DESCRIPTION("Packet Generator tool"); 3853 MODULE_LICENSE("GPL"); 3854 MODULE_VERSION(VERSION); 3855 module_param(pg_count_d, int, 0); 3856 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3857 module_param(pg_delay_d, int, 0); 3858 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3859 module_param(pg_clone_skb_d, int, 0); 3860 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3861 module_param(debug, int, 0); 3862 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3863