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 2216 if (likely(t.task)) 2217 schedule(); 2218 2219 hrtimer_cancel(&t.timer); 2220 } while (t.task && pkt_dev->running && !signal_pending(current)); 2221 __set_current_state(TASK_RUNNING); 2222 end_time = ktime_get(); 2223 } 2224 2225 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2226 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2227 } 2228 2229 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2230 { 2231 pkt_dev->pkt_overhead = 0; 2232 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2233 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2234 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2235 } 2236 2237 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2238 { 2239 return !!(pkt_dev->flows[flow].flags & F_INIT); 2240 } 2241 2242 static inline int f_pick(struct pktgen_dev *pkt_dev) 2243 { 2244 int flow = pkt_dev->curfl; 2245 2246 if (pkt_dev->flags & F_FLOW_SEQ) { 2247 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2248 /* reset time */ 2249 pkt_dev->flows[flow].count = 0; 2250 pkt_dev->flows[flow].flags = 0; 2251 pkt_dev->curfl += 1; 2252 if (pkt_dev->curfl >= pkt_dev->cflows) 2253 pkt_dev->curfl = 0; /*reset */ 2254 } 2255 } else { 2256 flow = prandom_u32() % pkt_dev->cflows; 2257 pkt_dev->curfl = flow; 2258 2259 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2260 pkt_dev->flows[flow].count = 0; 2261 pkt_dev->flows[flow].flags = 0; 2262 } 2263 } 2264 2265 return pkt_dev->curfl; 2266 } 2267 2268 2269 #ifdef CONFIG_XFRM 2270 /* If there was already an IPSEC SA, we keep it as is, else 2271 * we go look for it ... 2272 */ 2273 #define DUMMY_MARK 0 2274 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2275 { 2276 struct xfrm_state *x = pkt_dev->flows[flow].x; 2277 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2278 if (!x) { 2279 2280 if (pkt_dev->spi) { 2281 /* We need as quick as possible to find the right SA 2282 * Searching with minimum criteria to archieve this. 2283 */ 2284 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); 2285 } else { 2286 /* slow path: we dont already have xfrm_state */ 2287 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2288 (xfrm_address_t *)&pkt_dev->cur_daddr, 2289 (xfrm_address_t *)&pkt_dev->cur_saddr, 2290 AF_INET, 2291 pkt_dev->ipsmode, 2292 pkt_dev->ipsproto, 0); 2293 } 2294 if (x) { 2295 pkt_dev->flows[flow].x = x; 2296 set_pkt_overhead(pkt_dev); 2297 pkt_dev->pkt_overhead += x->props.header_len; 2298 } 2299 2300 } 2301 } 2302 #endif 2303 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2304 { 2305 2306 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2307 pkt_dev->cur_queue_map = smp_processor_id(); 2308 2309 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2310 __u16 t; 2311 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2312 t = prandom_u32() % 2313 (pkt_dev->queue_map_max - 2314 pkt_dev->queue_map_min + 1) 2315 + pkt_dev->queue_map_min; 2316 } else { 2317 t = pkt_dev->cur_queue_map + 1; 2318 if (t > pkt_dev->queue_map_max) 2319 t = pkt_dev->queue_map_min; 2320 } 2321 pkt_dev->cur_queue_map = t; 2322 } 2323 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2324 } 2325 2326 /* Increment/randomize headers according to flags and current values 2327 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2328 */ 2329 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2330 { 2331 __u32 imn; 2332 __u32 imx; 2333 int flow = 0; 2334 2335 if (pkt_dev->cflows) 2336 flow = f_pick(pkt_dev); 2337 2338 /* Deal with source MAC */ 2339 if (pkt_dev->src_mac_count > 1) { 2340 __u32 mc; 2341 __u32 tmp; 2342 2343 if (pkt_dev->flags & F_MACSRC_RND) 2344 mc = prandom_u32() % pkt_dev->src_mac_count; 2345 else { 2346 mc = pkt_dev->cur_src_mac_offset++; 2347 if (pkt_dev->cur_src_mac_offset >= 2348 pkt_dev->src_mac_count) 2349 pkt_dev->cur_src_mac_offset = 0; 2350 } 2351 2352 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2353 pkt_dev->hh[11] = tmp; 2354 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2355 pkt_dev->hh[10] = tmp; 2356 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2357 pkt_dev->hh[9] = tmp; 2358 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2359 pkt_dev->hh[8] = tmp; 2360 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2361 pkt_dev->hh[7] = tmp; 2362 } 2363 2364 /* Deal with Destination MAC */ 2365 if (pkt_dev->dst_mac_count > 1) { 2366 __u32 mc; 2367 __u32 tmp; 2368 2369 if (pkt_dev->flags & F_MACDST_RND) 2370 mc = prandom_u32() % pkt_dev->dst_mac_count; 2371 2372 else { 2373 mc = pkt_dev->cur_dst_mac_offset++; 2374 if (pkt_dev->cur_dst_mac_offset >= 2375 pkt_dev->dst_mac_count) { 2376 pkt_dev->cur_dst_mac_offset = 0; 2377 } 2378 } 2379 2380 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2381 pkt_dev->hh[5] = tmp; 2382 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2383 pkt_dev->hh[4] = tmp; 2384 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2385 pkt_dev->hh[3] = tmp; 2386 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2387 pkt_dev->hh[2] = tmp; 2388 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2389 pkt_dev->hh[1] = tmp; 2390 } 2391 2392 if (pkt_dev->flags & F_MPLS_RND) { 2393 unsigned int i; 2394 for (i = 0; i < pkt_dev->nr_labels; i++) 2395 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2396 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2397 ((__force __be32)prandom_u32() & 2398 htonl(0x000fffff)); 2399 } 2400 2401 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2402 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2403 } 2404 2405 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2406 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2407 } 2408 2409 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2410 if (pkt_dev->flags & F_UDPSRC_RND) 2411 pkt_dev->cur_udp_src = prandom_u32() % 2412 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2413 + pkt_dev->udp_src_min; 2414 2415 else { 2416 pkt_dev->cur_udp_src++; 2417 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2418 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2419 } 2420 } 2421 2422 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2423 if (pkt_dev->flags & F_UDPDST_RND) { 2424 pkt_dev->cur_udp_dst = prandom_u32() % 2425 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2426 + pkt_dev->udp_dst_min; 2427 } else { 2428 pkt_dev->cur_udp_dst++; 2429 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2430 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2431 } 2432 } 2433 2434 if (!(pkt_dev->flags & F_IPV6)) { 2435 2436 imn = ntohl(pkt_dev->saddr_min); 2437 imx = ntohl(pkt_dev->saddr_max); 2438 if (imn < imx) { 2439 __u32 t; 2440 if (pkt_dev->flags & F_IPSRC_RND) 2441 t = prandom_u32() % (imx - imn) + imn; 2442 else { 2443 t = ntohl(pkt_dev->cur_saddr); 2444 t++; 2445 if (t > imx) 2446 t = imn; 2447 2448 } 2449 pkt_dev->cur_saddr = htonl(t); 2450 } 2451 2452 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2453 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2454 } else { 2455 imn = ntohl(pkt_dev->daddr_min); 2456 imx = ntohl(pkt_dev->daddr_max); 2457 if (imn < imx) { 2458 __u32 t; 2459 __be32 s; 2460 if (pkt_dev->flags & F_IPDST_RND) { 2461 2462 do { 2463 t = prandom_u32() % 2464 (imx - imn) + imn; 2465 s = htonl(t); 2466 } while (ipv4_is_loopback(s) || 2467 ipv4_is_multicast(s) || 2468 ipv4_is_lbcast(s) || 2469 ipv4_is_zeronet(s) || 2470 ipv4_is_local_multicast(s)); 2471 pkt_dev->cur_daddr = s; 2472 } else { 2473 t = ntohl(pkt_dev->cur_daddr); 2474 t++; 2475 if (t > imx) { 2476 t = imn; 2477 } 2478 pkt_dev->cur_daddr = htonl(t); 2479 } 2480 } 2481 if (pkt_dev->cflows) { 2482 pkt_dev->flows[flow].flags |= F_INIT; 2483 pkt_dev->flows[flow].cur_daddr = 2484 pkt_dev->cur_daddr; 2485 #ifdef CONFIG_XFRM 2486 if (pkt_dev->flags & F_IPSEC_ON) 2487 get_ipsec_sa(pkt_dev, flow); 2488 #endif 2489 pkt_dev->nflows++; 2490 } 2491 } 2492 } else { /* IPV6 * */ 2493 2494 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2495 int i; 2496 2497 /* Only random destinations yet */ 2498 2499 for (i = 0; i < 4; i++) { 2500 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2501 (((__force __be32)prandom_u32() | 2502 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2503 pkt_dev->max_in6_daddr.s6_addr32[i]); 2504 } 2505 } 2506 } 2507 2508 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2509 __u32 t; 2510 if (pkt_dev->flags & F_TXSIZE_RND) { 2511 t = prandom_u32() % 2512 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2513 + pkt_dev->min_pkt_size; 2514 } else { 2515 t = pkt_dev->cur_pkt_size + 1; 2516 if (t > pkt_dev->max_pkt_size) 2517 t = pkt_dev->min_pkt_size; 2518 } 2519 pkt_dev->cur_pkt_size = t; 2520 } 2521 2522 set_cur_queue_map(pkt_dev); 2523 2524 pkt_dev->flows[flow].count++; 2525 } 2526 2527 2528 #ifdef CONFIG_XFRM 2529 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { 2530 2531 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ 2532 }; 2533 2534 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2535 { 2536 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2537 int err = 0; 2538 struct net *net = dev_net(pkt_dev->odev); 2539 2540 if (!x) 2541 return 0; 2542 /* XXX: we dont support tunnel mode for now until 2543 * we resolve the dst issue */ 2544 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) 2545 return 0; 2546 2547 /* But when user specify an valid SPI, transformation 2548 * supports both transport/tunnel mode + ESP/AH type. 2549 */ 2550 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) 2551 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; 2552 2553 rcu_read_lock_bh(); 2554 err = x->outer_mode->output(x, skb); 2555 rcu_read_unlock_bh(); 2556 if (err) { 2557 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); 2558 goto error; 2559 } 2560 err = x->type->output(x, skb); 2561 if (err) { 2562 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); 2563 goto error; 2564 } 2565 spin_lock_bh(&x->lock); 2566 x->curlft.bytes += skb->len; 2567 x->curlft.packets++; 2568 spin_unlock_bh(&x->lock); 2569 error: 2570 return err; 2571 } 2572 2573 static void free_SAs(struct pktgen_dev *pkt_dev) 2574 { 2575 if (pkt_dev->cflows) { 2576 /* let go of the SAs if we have them */ 2577 int i; 2578 for (i = 0; i < pkt_dev->cflows; i++) { 2579 struct xfrm_state *x = pkt_dev->flows[i].x; 2580 if (x) { 2581 xfrm_state_put(x); 2582 pkt_dev->flows[i].x = NULL; 2583 } 2584 } 2585 } 2586 } 2587 2588 static int process_ipsec(struct pktgen_dev *pkt_dev, 2589 struct sk_buff *skb, __be16 protocol) 2590 { 2591 if (pkt_dev->flags & F_IPSEC_ON) { 2592 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2593 int nhead = 0; 2594 if (x) { 2595 int ret; 2596 __u8 *eth; 2597 struct iphdr *iph; 2598 2599 nhead = x->props.header_len - skb_headroom(skb); 2600 if (nhead > 0) { 2601 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2602 if (ret < 0) { 2603 pr_err("Error expanding ipsec packet %d\n", 2604 ret); 2605 goto err; 2606 } 2607 } 2608 2609 /* ipsec is not expecting ll header */ 2610 skb_pull(skb, ETH_HLEN); 2611 ret = pktgen_output_ipsec(skb, pkt_dev); 2612 if (ret) { 2613 pr_err("Error creating ipsec packet %d\n", ret); 2614 goto err; 2615 } 2616 /* restore ll */ 2617 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2618 memcpy(eth, pkt_dev->hh, 12); 2619 *(u16 *) ð[12] = protocol; 2620 2621 /* Update IPv4 header len as well as checksum value */ 2622 iph = ip_hdr(skb); 2623 iph->tot_len = htons(skb->len - ETH_HLEN); 2624 ip_send_check(iph); 2625 } 2626 } 2627 return 1; 2628 err: 2629 kfree_skb(skb); 2630 return 0; 2631 } 2632 #endif 2633 2634 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2635 { 2636 unsigned int i; 2637 for (i = 0; i < pkt_dev->nr_labels; i++) 2638 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2639 2640 mpls--; 2641 *mpls |= MPLS_STACK_BOTTOM; 2642 } 2643 2644 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2645 unsigned int prio) 2646 { 2647 return htons(id | (cfi << 12) | (prio << 13)); 2648 } 2649 2650 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2651 int datalen) 2652 { 2653 struct timeval timestamp; 2654 struct pktgen_hdr *pgh; 2655 2656 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2657 datalen -= sizeof(*pgh); 2658 2659 if (pkt_dev->nfrags <= 0) { 2660 memset(skb_put(skb, datalen), 0, datalen); 2661 } else { 2662 int frags = pkt_dev->nfrags; 2663 int i, len; 2664 int frag_len; 2665 2666 2667 if (frags > MAX_SKB_FRAGS) 2668 frags = MAX_SKB_FRAGS; 2669 len = datalen - frags * PAGE_SIZE; 2670 if (len > 0) { 2671 memset(skb_put(skb, len), 0, len); 2672 datalen = frags * PAGE_SIZE; 2673 } 2674 2675 i = 0; 2676 frag_len = (datalen/frags) < PAGE_SIZE ? 2677 (datalen/frags) : PAGE_SIZE; 2678 while (datalen > 0) { 2679 if (unlikely(!pkt_dev->page)) { 2680 int node = numa_node_id(); 2681 2682 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2683 node = pkt_dev->node; 2684 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2685 if (!pkt_dev->page) 2686 break; 2687 } 2688 get_page(pkt_dev->page); 2689 skb_frag_set_page(skb, i, pkt_dev->page); 2690 skb_shinfo(skb)->frags[i].page_offset = 0; 2691 /*last fragment, fill rest of data*/ 2692 if (i == (frags - 1)) 2693 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2694 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2695 else 2696 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2697 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2698 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2699 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2700 i++; 2701 skb_shinfo(skb)->nr_frags = i; 2702 } 2703 } 2704 2705 /* Stamp the time, and sequence number, 2706 * convert them to network byte order 2707 */ 2708 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2709 pgh->seq_num = htonl(pkt_dev->seq_num); 2710 2711 if (pkt_dev->flags & F_NO_TIMESTAMP) { 2712 pgh->tv_sec = 0; 2713 pgh->tv_usec = 0; 2714 } else { 2715 do_gettimeofday(×tamp); 2716 pgh->tv_sec = htonl(timestamp.tv_sec); 2717 pgh->tv_usec = htonl(timestamp.tv_usec); 2718 } 2719 } 2720 2721 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2722 struct pktgen_dev *pkt_dev, 2723 unsigned int extralen) 2724 { 2725 struct sk_buff *skb = NULL; 2726 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2727 pkt_dev->pkt_overhead; 2728 2729 if (pkt_dev->flags & F_NODE) { 2730 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2731 2732 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2733 if (likely(skb)) { 2734 skb_reserve(skb, NET_SKB_PAD); 2735 skb->dev = dev; 2736 } 2737 } else { 2738 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2739 } 2740 2741 return skb; 2742 } 2743 2744 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2745 struct pktgen_dev *pkt_dev) 2746 { 2747 struct sk_buff *skb = NULL; 2748 __u8 *eth; 2749 struct udphdr *udph; 2750 int datalen, iplen; 2751 struct iphdr *iph; 2752 __be16 protocol = htons(ETH_P_IP); 2753 __be32 *mpls; 2754 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2755 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2756 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2757 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2758 u16 queue_map; 2759 2760 if (pkt_dev->nr_labels) 2761 protocol = htons(ETH_P_MPLS_UC); 2762 2763 if (pkt_dev->vlan_id != 0xffff) 2764 protocol = htons(ETH_P_8021Q); 2765 2766 /* Update any of the values, used when we're incrementing various 2767 * fields. 2768 */ 2769 mod_cur_headers(pkt_dev); 2770 queue_map = pkt_dev->cur_queue_map; 2771 2772 datalen = (odev->hard_header_len + 16) & ~0xf; 2773 2774 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2775 if (!skb) { 2776 sprintf(pkt_dev->result, "No memory"); 2777 return NULL; 2778 } 2779 2780 prefetchw(skb->data); 2781 skb_reserve(skb, datalen); 2782 2783 /* Reserve for ethernet and IP header */ 2784 eth = (__u8 *) skb_push(skb, 14); 2785 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2786 if (pkt_dev->nr_labels) 2787 mpls_push(mpls, pkt_dev); 2788 2789 if (pkt_dev->vlan_id != 0xffff) { 2790 if (pkt_dev->svlan_id != 0xffff) { 2791 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2792 *svlan_tci = build_tci(pkt_dev->svlan_id, 2793 pkt_dev->svlan_cfi, 2794 pkt_dev->svlan_p); 2795 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2796 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2797 } 2798 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2799 *vlan_tci = build_tci(pkt_dev->vlan_id, 2800 pkt_dev->vlan_cfi, 2801 pkt_dev->vlan_p); 2802 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2803 *vlan_encapsulated_proto = htons(ETH_P_IP); 2804 } 2805 2806 skb_set_mac_header(skb, 0); 2807 skb_set_network_header(skb, skb->len); 2808 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2809 2810 skb_set_transport_header(skb, skb->len); 2811 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2812 skb_set_queue_mapping(skb, queue_map); 2813 skb->priority = pkt_dev->skb_priority; 2814 2815 memcpy(eth, pkt_dev->hh, 12); 2816 *(__be16 *) & eth[12] = protocol; 2817 2818 /* Eth + IPh + UDPh + mpls */ 2819 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2820 pkt_dev->pkt_overhead; 2821 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2822 datalen = sizeof(struct pktgen_hdr); 2823 2824 udph->source = htons(pkt_dev->cur_udp_src); 2825 udph->dest = htons(pkt_dev->cur_udp_dst); 2826 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2827 udph->check = 0; 2828 2829 iph->ihl = 5; 2830 iph->version = 4; 2831 iph->ttl = 32; 2832 iph->tos = pkt_dev->tos; 2833 iph->protocol = IPPROTO_UDP; /* UDP */ 2834 iph->saddr = pkt_dev->cur_saddr; 2835 iph->daddr = pkt_dev->cur_daddr; 2836 iph->id = htons(pkt_dev->ip_id); 2837 pkt_dev->ip_id++; 2838 iph->frag_off = 0; 2839 iplen = 20 + 8 + datalen; 2840 iph->tot_len = htons(iplen); 2841 ip_send_check(iph); 2842 skb->protocol = protocol; 2843 skb->dev = odev; 2844 skb->pkt_type = PACKET_HOST; 2845 2846 pktgen_finalize_skb(pkt_dev, skb, datalen); 2847 2848 if (!(pkt_dev->flags & F_UDPCSUM)) { 2849 skb->ip_summed = CHECKSUM_NONE; 2850 } else if (odev->features & NETIF_F_V4_CSUM) { 2851 skb->ip_summed = CHECKSUM_PARTIAL; 2852 skb->csum = 0; 2853 udp4_hwcsum(skb, iph->saddr, iph->daddr); 2854 } else { 2855 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); 2856 2857 /* add protocol-dependent pseudo-header */ 2858 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, 2859 datalen + 8, IPPROTO_UDP, csum); 2860 2861 if (udph->check == 0) 2862 udph->check = CSUM_MANGLED_0; 2863 } 2864 2865 #ifdef CONFIG_XFRM 2866 if (!process_ipsec(pkt_dev, skb, protocol)) 2867 return NULL; 2868 #endif 2869 2870 return skb; 2871 } 2872 2873 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2874 struct pktgen_dev *pkt_dev) 2875 { 2876 struct sk_buff *skb = NULL; 2877 __u8 *eth; 2878 struct udphdr *udph; 2879 int datalen, udplen; 2880 struct ipv6hdr *iph; 2881 __be16 protocol = htons(ETH_P_IPV6); 2882 __be32 *mpls; 2883 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2884 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2885 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2886 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2887 u16 queue_map; 2888 2889 if (pkt_dev->nr_labels) 2890 protocol = htons(ETH_P_MPLS_UC); 2891 2892 if (pkt_dev->vlan_id != 0xffff) 2893 protocol = htons(ETH_P_8021Q); 2894 2895 /* Update any of the values, used when we're incrementing various 2896 * fields. 2897 */ 2898 mod_cur_headers(pkt_dev); 2899 queue_map = pkt_dev->cur_queue_map; 2900 2901 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2902 if (!skb) { 2903 sprintf(pkt_dev->result, "No memory"); 2904 return NULL; 2905 } 2906 2907 prefetchw(skb->data); 2908 skb_reserve(skb, 16); 2909 2910 /* Reserve for ethernet and IP header */ 2911 eth = (__u8 *) skb_push(skb, 14); 2912 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2913 if (pkt_dev->nr_labels) 2914 mpls_push(mpls, pkt_dev); 2915 2916 if (pkt_dev->vlan_id != 0xffff) { 2917 if (pkt_dev->svlan_id != 0xffff) { 2918 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2919 *svlan_tci = build_tci(pkt_dev->svlan_id, 2920 pkt_dev->svlan_cfi, 2921 pkt_dev->svlan_p); 2922 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2923 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2924 } 2925 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2926 *vlan_tci = build_tci(pkt_dev->vlan_id, 2927 pkt_dev->vlan_cfi, 2928 pkt_dev->vlan_p); 2929 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2930 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2931 } 2932 2933 skb_set_mac_header(skb, 0); 2934 skb_set_network_header(skb, skb->len); 2935 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2936 2937 skb_set_transport_header(skb, skb->len); 2938 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2939 skb_set_queue_mapping(skb, queue_map); 2940 skb->priority = pkt_dev->skb_priority; 2941 2942 memcpy(eth, pkt_dev->hh, 12); 2943 *(__be16 *) ð[12] = protocol; 2944 2945 /* Eth + IPh + UDPh + mpls */ 2946 datalen = pkt_dev->cur_pkt_size - 14 - 2947 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2948 pkt_dev->pkt_overhead; 2949 2950 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2951 datalen = sizeof(struct pktgen_hdr); 2952 net_info_ratelimited("increased datalen to %d\n", datalen); 2953 } 2954 2955 udplen = datalen + sizeof(struct udphdr); 2956 udph->source = htons(pkt_dev->cur_udp_src); 2957 udph->dest = htons(pkt_dev->cur_udp_dst); 2958 udph->len = htons(udplen); 2959 udph->check = 0; 2960 2961 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2962 2963 if (pkt_dev->traffic_class) { 2964 /* Version + traffic class + flow (0) */ 2965 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2966 } 2967 2968 iph->hop_limit = 32; 2969 2970 iph->payload_len = htons(udplen); 2971 iph->nexthdr = IPPROTO_UDP; 2972 2973 iph->daddr = pkt_dev->cur_in6_daddr; 2974 iph->saddr = pkt_dev->cur_in6_saddr; 2975 2976 skb->protocol = protocol; 2977 skb->dev = odev; 2978 skb->pkt_type = PACKET_HOST; 2979 2980 pktgen_finalize_skb(pkt_dev, skb, datalen); 2981 2982 if (!(pkt_dev->flags & F_UDPCSUM)) { 2983 skb->ip_summed = CHECKSUM_NONE; 2984 } else if (odev->features & NETIF_F_V6_CSUM) { 2985 skb->ip_summed = CHECKSUM_PARTIAL; 2986 skb->csum_start = skb_transport_header(skb) - skb->head; 2987 skb->csum_offset = offsetof(struct udphdr, check); 2988 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 2989 } else { 2990 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); 2991 2992 /* add protocol-dependent pseudo-header */ 2993 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 2994 2995 if (udph->check == 0) 2996 udph->check = CSUM_MANGLED_0; 2997 } 2998 2999 return skb; 3000 } 3001 3002 static struct sk_buff *fill_packet(struct net_device *odev, 3003 struct pktgen_dev *pkt_dev) 3004 { 3005 if (pkt_dev->flags & F_IPV6) 3006 return fill_packet_ipv6(odev, pkt_dev); 3007 else 3008 return fill_packet_ipv4(odev, pkt_dev); 3009 } 3010 3011 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3012 { 3013 pkt_dev->seq_num = 1; 3014 pkt_dev->idle_acc = 0; 3015 pkt_dev->sofar = 0; 3016 pkt_dev->tx_bytes = 0; 3017 pkt_dev->errors = 0; 3018 } 3019 3020 /* Set up structure for sending pkts, clear counters */ 3021 3022 static void pktgen_run(struct pktgen_thread *t) 3023 { 3024 struct pktgen_dev *pkt_dev; 3025 int started = 0; 3026 3027 func_enter(); 3028 3029 rcu_read_lock(); 3030 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3031 3032 /* 3033 * setup odev and create initial packet. 3034 */ 3035 pktgen_setup_inject(pkt_dev); 3036 3037 if (pkt_dev->odev) { 3038 pktgen_clear_counters(pkt_dev); 3039 pkt_dev->skb = NULL; 3040 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3041 3042 set_pkt_overhead(pkt_dev); 3043 3044 strcpy(pkt_dev->result, "Starting"); 3045 pkt_dev->running = 1; /* Cranke yeself! */ 3046 started++; 3047 } else 3048 strcpy(pkt_dev->result, "Error starting"); 3049 } 3050 rcu_read_unlock(); 3051 if (started) 3052 t->control &= ~(T_STOP); 3053 } 3054 3055 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 3056 { 3057 struct pktgen_thread *t; 3058 3059 func_enter(); 3060 3061 mutex_lock(&pktgen_thread_lock); 3062 3063 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3064 t->control |= T_STOP; 3065 3066 mutex_unlock(&pktgen_thread_lock); 3067 } 3068 3069 static int thread_is_running(const struct pktgen_thread *t) 3070 { 3071 const struct pktgen_dev *pkt_dev; 3072 3073 rcu_read_lock(); 3074 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 3075 if (pkt_dev->running) { 3076 rcu_read_unlock(); 3077 return 1; 3078 } 3079 rcu_read_unlock(); 3080 return 0; 3081 } 3082 3083 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3084 { 3085 while (thread_is_running(t)) { 3086 3087 msleep_interruptible(100); 3088 3089 if (signal_pending(current)) 3090 goto signal; 3091 } 3092 return 1; 3093 signal: 3094 return 0; 3095 } 3096 3097 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3098 { 3099 struct pktgen_thread *t; 3100 int sig = 1; 3101 3102 mutex_lock(&pktgen_thread_lock); 3103 3104 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3105 sig = pktgen_wait_thread_run(t); 3106 if (sig == 0) 3107 break; 3108 } 3109 3110 if (sig == 0) 3111 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3112 t->control |= (T_STOP); 3113 3114 mutex_unlock(&pktgen_thread_lock); 3115 return sig; 3116 } 3117 3118 static void pktgen_run_all_threads(struct pktgen_net *pn) 3119 { 3120 struct pktgen_thread *t; 3121 3122 func_enter(); 3123 3124 mutex_lock(&pktgen_thread_lock); 3125 3126 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3127 t->control |= (T_RUN); 3128 3129 mutex_unlock(&pktgen_thread_lock); 3130 3131 /* Propagate thread->control */ 3132 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3133 3134 pktgen_wait_all_threads_run(pn); 3135 } 3136 3137 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3138 { 3139 struct pktgen_thread *t; 3140 3141 func_enter(); 3142 3143 mutex_lock(&pktgen_thread_lock); 3144 3145 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3146 t->control |= (T_REMDEVALL); 3147 3148 mutex_unlock(&pktgen_thread_lock); 3149 3150 /* Propagate thread->control */ 3151 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3152 3153 pktgen_wait_all_threads_run(pn); 3154 } 3155 3156 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3157 { 3158 __u64 bps, mbps, pps; 3159 char *p = pkt_dev->result; 3160 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3161 pkt_dev->started_at); 3162 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3163 3164 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3165 (unsigned long long)ktime_to_us(elapsed), 3166 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3167 (unsigned long long)ktime_to_us(idle), 3168 (unsigned long long)pkt_dev->sofar, 3169 pkt_dev->cur_pkt_size, nr_frags); 3170 3171 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3172 ktime_to_ns(elapsed)); 3173 3174 bps = pps * 8 * pkt_dev->cur_pkt_size; 3175 3176 mbps = bps; 3177 do_div(mbps, 1000000); 3178 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3179 (unsigned long long)pps, 3180 (unsigned long long)mbps, 3181 (unsigned long long)bps, 3182 (unsigned long long)pkt_dev->errors); 3183 } 3184 3185 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3186 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3187 { 3188 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3189 3190 if (!pkt_dev->running) { 3191 pr_warn("interface: %s is already stopped\n", 3192 pkt_dev->odevname); 3193 return -EINVAL; 3194 } 3195 3196 pkt_dev->running = 0; 3197 kfree_skb(pkt_dev->skb); 3198 pkt_dev->skb = NULL; 3199 pkt_dev->stopped_at = ktime_get(); 3200 3201 show_results(pkt_dev, nr_frags); 3202 3203 return 0; 3204 } 3205 3206 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3207 { 3208 struct pktgen_dev *pkt_dev, *best = NULL; 3209 3210 rcu_read_lock(); 3211 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3212 if (!pkt_dev->running) 3213 continue; 3214 if (best == NULL) 3215 best = pkt_dev; 3216 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3217 best = pkt_dev; 3218 } 3219 rcu_read_unlock(); 3220 3221 return best; 3222 } 3223 3224 static void pktgen_stop(struct pktgen_thread *t) 3225 { 3226 struct pktgen_dev *pkt_dev; 3227 3228 func_enter(); 3229 3230 rcu_read_lock(); 3231 3232 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3233 pktgen_stop_device(pkt_dev); 3234 } 3235 3236 rcu_read_unlock(); 3237 } 3238 3239 /* 3240 * one of our devices needs to be removed - find it 3241 * and remove it 3242 */ 3243 static void pktgen_rem_one_if(struct pktgen_thread *t) 3244 { 3245 struct list_head *q, *n; 3246 struct pktgen_dev *cur; 3247 3248 func_enter(); 3249 3250 list_for_each_safe(q, n, &t->if_list) { 3251 cur = list_entry(q, struct pktgen_dev, list); 3252 3253 if (!cur->removal_mark) 3254 continue; 3255 3256 kfree_skb(cur->skb); 3257 cur->skb = NULL; 3258 3259 pktgen_remove_device(t, cur); 3260 3261 break; 3262 } 3263 } 3264 3265 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3266 { 3267 struct list_head *q, *n; 3268 struct pktgen_dev *cur; 3269 3270 func_enter(); 3271 3272 /* Remove all devices, free mem */ 3273 3274 list_for_each_safe(q, n, &t->if_list) { 3275 cur = list_entry(q, struct pktgen_dev, list); 3276 3277 kfree_skb(cur->skb); 3278 cur->skb = NULL; 3279 3280 pktgen_remove_device(t, cur); 3281 } 3282 } 3283 3284 static void pktgen_rem_thread(struct pktgen_thread *t) 3285 { 3286 /* Remove from the thread list */ 3287 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3288 } 3289 3290 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3291 { 3292 ktime_t idle_start = ktime_get(); 3293 schedule(); 3294 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3295 } 3296 3297 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3298 { 3299 ktime_t idle_start = ktime_get(); 3300 3301 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3302 if (signal_pending(current)) 3303 break; 3304 3305 if (need_resched()) 3306 pktgen_resched(pkt_dev); 3307 else 3308 cpu_relax(); 3309 } 3310 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3311 } 3312 3313 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3314 { 3315 unsigned int burst = ACCESS_ONCE(pkt_dev->burst); 3316 struct net_device *odev = pkt_dev->odev; 3317 struct netdev_queue *txq; 3318 int ret; 3319 3320 /* If device is offline, then don't send */ 3321 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3322 pktgen_stop_device(pkt_dev); 3323 return; 3324 } 3325 3326 /* This is max DELAY, this has special meaning of 3327 * "never transmit" 3328 */ 3329 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3330 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3331 return; 3332 } 3333 3334 /* If no skb or clone count exhausted then get new one */ 3335 if (!pkt_dev->skb || (pkt_dev->last_ok && 3336 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3337 /* build a new pkt */ 3338 kfree_skb(pkt_dev->skb); 3339 3340 pkt_dev->skb = fill_packet(odev, pkt_dev); 3341 if (pkt_dev->skb == NULL) { 3342 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3343 schedule(); 3344 pkt_dev->clone_count--; /* back out increment, OOM */ 3345 return; 3346 } 3347 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3348 pkt_dev->allocated_skbs++; 3349 pkt_dev->clone_count = 0; /* reset counter */ 3350 } 3351 3352 if (pkt_dev->delay && pkt_dev->last_ok) 3353 spin(pkt_dev, pkt_dev->next_tx); 3354 3355 txq = skb_get_tx_queue(odev, pkt_dev->skb); 3356 3357 local_bh_disable(); 3358 3359 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3360 3361 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3362 ret = NETDEV_TX_BUSY; 3363 pkt_dev->last_ok = 0; 3364 goto unlock; 3365 } 3366 atomic_add(burst, &pkt_dev->skb->users); 3367 3368 xmit_more: 3369 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); 3370 3371 switch (ret) { 3372 case NETDEV_TX_OK: 3373 pkt_dev->last_ok = 1; 3374 pkt_dev->sofar++; 3375 pkt_dev->seq_num++; 3376 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3377 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) 3378 goto xmit_more; 3379 break; 3380 case NET_XMIT_DROP: 3381 case NET_XMIT_CN: 3382 case NET_XMIT_POLICED: 3383 /* skb has been consumed */ 3384 pkt_dev->errors++; 3385 break; 3386 default: /* Drivers are not supposed to return other values! */ 3387 net_info_ratelimited("%s xmit error: %d\n", 3388 pkt_dev->odevname, ret); 3389 pkt_dev->errors++; 3390 /* fallthru */ 3391 case NETDEV_TX_LOCKED: 3392 case NETDEV_TX_BUSY: 3393 /* Retry it next time */ 3394 atomic_dec(&(pkt_dev->skb->users)); 3395 pkt_dev->last_ok = 0; 3396 } 3397 if (unlikely(burst)) 3398 atomic_sub(burst, &pkt_dev->skb->users); 3399 unlock: 3400 HARD_TX_UNLOCK(odev, txq); 3401 3402 local_bh_enable(); 3403 3404 /* If pkt_dev->count is zero, then run forever */ 3405 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3406 pktgen_wait_for_skb(pkt_dev); 3407 3408 /* Done with this */ 3409 pktgen_stop_device(pkt_dev); 3410 } 3411 } 3412 3413 /* 3414 * Main loop of the thread goes here 3415 */ 3416 3417 static int pktgen_thread_worker(void *arg) 3418 { 3419 DEFINE_WAIT(wait); 3420 struct pktgen_thread *t = arg; 3421 struct pktgen_dev *pkt_dev = NULL; 3422 int cpu = t->cpu; 3423 3424 BUG_ON(smp_processor_id() != cpu); 3425 3426 init_waitqueue_head(&t->queue); 3427 complete(&t->start_done); 3428 3429 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3430 3431 set_freezable(); 3432 3433 __set_current_state(TASK_RUNNING); 3434 3435 while (!kthread_should_stop()) { 3436 pkt_dev = next_to_run(t); 3437 3438 if (unlikely(!pkt_dev && t->control == 0)) { 3439 if (t->net->pktgen_exiting) 3440 break; 3441 wait_event_interruptible_timeout(t->queue, 3442 t->control != 0, 3443 HZ/10); 3444 try_to_freeze(); 3445 continue; 3446 } 3447 3448 if (likely(pkt_dev)) { 3449 pktgen_xmit(pkt_dev); 3450 3451 if (need_resched()) 3452 pktgen_resched(pkt_dev); 3453 else 3454 cpu_relax(); 3455 } 3456 3457 if (t->control & T_STOP) { 3458 pktgen_stop(t); 3459 t->control &= ~(T_STOP); 3460 } 3461 3462 if (t->control & T_RUN) { 3463 pktgen_run(t); 3464 t->control &= ~(T_RUN); 3465 } 3466 3467 if (t->control & T_REMDEVALL) { 3468 pktgen_rem_all_ifs(t); 3469 t->control &= ~(T_REMDEVALL); 3470 } 3471 3472 if (t->control & T_REMDEV) { 3473 pktgen_rem_one_if(t); 3474 t->control &= ~(T_REMDEV); 3475 } 3476 3477 try_to_freeze(); 3478 } 3479 set_current_state(TASK_INTERRUPTIBLE); 3480 3481 pr_debug("%s stopping all device\n", t->tsk->comm); 3482 pktgen_stop(t); 3483 3484 pr_debug("%s removing all device\n", t->tsk->comm); 3485 pktgen_rem_all_ifs(t); 3486 3487 pr_debug("%s removing thread\n", t->tsk->comm); 3488 pktgen_rem_thread(t); 3489 3490 /* Wait for kthread_stop */ 3491 while (!kthread_should_stop()) { 3492 set_current_state(TASK_INTERRUPTIBLE); 3493 schedule(); 3494 } 3495 __set_current_state(TASK_RUNNING); 3496 3497 return 0; 3498 } 3499 3500 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3501 const char *ifname, bool exact) 3502 { 3503 struct pktgen_dev *p, *pkt_dev = NULL; 3504 size_t len = strlen(ifname); 3505 3506 rcu_read_lock(); 3507 list_for_each_entry_rcu(p, &t->if_list, list) 3508 if (strncmp(p->odevname, ifname, len) == 0) { 3509 if (p->odevname[len]) { 3510 if (exact || p->odevname[len] != '@') 3511 continue; 3512 } 3513 pkt_dev = p; 3514 break; 3515 } 3516 3517 rcu_read_unlock(); 3518 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3519 return pkt_dev; 3520 } 3521 3522 /* 3523 * Adds a dev at front of if_list. 3524 */ 3525 3526 static int add_dev_to_thread(struct pktgen_thread *t, 3527 struct pktgen_dev *pkt_dev) 3528 { 3529 int rv = 0; 3530 3531 /* This function cannot be called concurrently, as its called 3532 * under pktgen_thread_lock mutex, but it can run from 3533 * userspace on another CPU than the kthread. The if_lock() 3534 * is used here to sync with concurrent instances of 3535 * _rem_dev_from_if_list() invoked via kthread, which is also 3536 * updating the if_list */ 3537 if_lock(t); 3538 3539 if (pkt_dev->pg_thread) { 3540 pr_err("ERROR: already assigned to a thread\n"); 3541 rv = -EBUSY; 3542 goto out; 3543 } 3544 3545 pkt_dev->running = 0; 3546 pkt_dev->pg_thread = t; 3547 list_add_rcu(&pkt_dev->list, &t->if_list); 3548 3549 out: 3550 if_unlock(t); 3551 return rv; 3552 } 3553 3554 /* Called under thread lock */ 3555 3556 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3557 { 3558 struct pktgen_dev *pkt_dev; 3559 int err; 3560 int node = cpu_to_node(t->cpu); 3561 3562 /* We don't allow a device to be on several threads */ 3563 3564 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3565 if (pkt_dev) { 3566 pr_err("ERROR: interface already used\n"); 3567 return -EBUSY; 3568 } 3569 3570 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3571 if (!pkt_dev) 3572 return -ENOMEM; 3573 3574 strcpy(pkt_dev->odevname, ifname); 3575 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3576 node); 3577 if (pkt_dev->flows == NULL) { 3578 kfree(pkt_dev); 3579 return -ENOMEM; 3580 } 3581 3582 pkt_dev->removal_mark = 0; 3583 pkt_dev->nfrags = 0; 3584 pkt_dev->delay = pg_delay_d; 3585 pkt_dev->count = pg_count_d; 3586 pkt_dev->sofar = 0; 3587 pkt_dev->udp_src_min = 9; /* sink port */ 3588 pkt_dev->udp_src_max = 9; 3589 pkt_dev->udp_dst_min = 9; 3590 pkt_dev->udp_dst_max = 9; 3591 pkt_dev->vlan_p = 0; 3592 pkt_dev->vlan_cfi = 0; 3593 pkt_dev->vlan_id = 0xffff; 3594 pkt_dev->svlan_p = 0; 3595 pkt_dev->svlan_cfi = 0; 3596 pkt_dev->svlan_id = 0xffff; 3597 pkt_dev->burst = 1; 3598 pkt_dev->node = -1; 3599 3600 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3601 if (err) 3602 goto out1; 3603 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3604 pkt_dev->clone_skb = pg_clone_skb_d; 3605 3606 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3607 &pktgen_if_fops, pkt_dev); 3608 if (!pkt_dev->entry) { 3609 pr_err("cannot create %s/%s procfs entry\n", 3610 PG_PROC_DIR, ifname); 3611 err = -EINVAL; 3612 goto out2; 3613 } 3614 #ifdef CONFIG_XFRM 3615 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3616 pkt_dev->ipsproto = IPPROTO_ESP; 3617 3618 /* xfrm tunnel mode needs additional dst to extract outter 3619 * ip header protocol/ttl/id field, here creat a phony one. 3620 * instead of looking for a valid rt, which definitely hurting 3621 * performance under such circumstance. 3622 */ 3623 pkt_dev->dstops.family = AF_INET; 3624 pkt_dev->dst.dev = pkt_dev->odev; 3625 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); 3626 pkt_dev->dst.child = &pkt_dev->dst; 3627 pkt_dev->dst.ops = &pkt_dev->dstops; 3628 #endif 3629 3630 return add_dev_to_thread(t, pkt_dev); 3631 out2: 3632 dev_put(pkt_dev->odev); 3633 out1: 3634 #ifdef CONFIG_XFRM 3635 free_SAs(pkt_dev); 3636 #endif 3637 vfree(pkt_dev->flows); 3638 kfree(pkt_dev); 3639 return err; 3640 } 3641 3642 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3643 { 3644 struct pktgen_thread *t; 3645 struct proc_dir_entry *pe; 3646 struct task_struct *p; 3647 3648 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3649 cpu_to_node(cpu)); 3650 if (!t) { 3651 pr_err("ERROR: out of memory, can't create new thread\n"); 3652 return -ENOMEM; 3653 } 3654 3655 spin_lock_init(&t->if_lock); 3656 t->cpu = cpu; 3657 3658 INIT_LIST_HEAD(&t->if_list); 3659 3660 list_add_tail(&t->th_list, &pn->pktgen_threads); 3661 init_completion(&t->start_done); 3662 3663 p = kthread_create_on_node(pktgen_thread_worker, 3664 t, 3665 cpu_to_node(cpu), 3666 "kpktgend_%d", cpu); 3667 if (IS_ERR(p)) { 3668 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3669 list_del(&t->th_list); 3670 kfree(t); 3671 return PTR_ERR(p); 3672 } 3673 kthread_bind(p, cpu); 3674 t->tsk = p; 3675 3676 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3677 &pktgen_thread_fops, t); 3678 if (!pe) { 3679 pr_err("cannot create %s/%s procfs entry\n", 3680 PG_PROC_DIR, t->tsk->comm); 3681 kthread_stop(p); 3682 list_del(&t->th_list); 3683 kfree(t); 3684 return -EINVAL; 3685 } 3686 3687 t->net = pn; 3688 wake_up_process(p); 3689 wait_for_completion(&t->start_done); 3690 3691 return 0; 3692 } 3693 3694 /* 3695 * Removes a device from the thread if_list. 3696 */ 3697 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3698 struct pktgen_dev *pkt_dev) 3699 { 3700 struct list_head *q, *n; 3701 struct pktgen_dev *p; 3702 3703 if_lock(t); 3704 list_for_each_safe(q, n, &t->if_list) { 3705 p = list_entry(q, struct pktgen_dev, list); 3706 if (p == pkt_dev) 3707 list_del_rcu(&p->list); 3708 } 3709 if_unlock(t); 3710 } 3711 3712 static int pktgen_remove_device(struct pktgen_thread *t, 3713 struct pktgen_dev *pkt_dev) 3714 { 3715 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3716 3717 if (pkt_dev->running) { 3718 pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); 3719 pktgen_stop_device(pkt_dev); 3720 } 3721 3722 /* Dis-associate from the interface */ 3723 3724 if (pkt_dev->odev) { 3725 dev_put(pkt_dev->odev); 3726 pkt_dev->odev = NULL; 3727 } 3728 3729 /* Remove proc before if_list entry, because add_device uses 3730 * list to determine if interface already exist, avoid race 3731 * with proc_create_data() */ 3732 proc_remove(pkt_dev->entry); 3733 3734 /* And update the thread if_list */ 3735 _rem_dev_from_if_list(t, pkt_dev); 3736 3737 #ifdef CONFIG_XFRM 3738 free_SAs(pkt_dev); 3739 #endif 3740 vfree(pkt_dev->flows); 3741 if (pkt_dev->page) 3742 put_page(pkt_dev->page); 3743 kfree_rcu(pkt_dev, rcu); 3744 return 0; 3745 } 3746 3747 static int __net_init pg_net_init(struct net *net) 3748 { 3749 struct pktgen_net *pn = net_generic(net, pg_net_id); 3750 struct proc_dir_entry *pe; 3751 int cpu, ret = 0; 3752 3753 pn->net = net; 3754 INIT_LIST_HEAD(&pn->pktgen_threads); 3755 pn->pktgen_exiting = false; 3756 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3757 if (!pn->proc_dir) { 3758 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3759 return -ENODEV; 3760 } 3761 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3762 if (pe == NULL) { 3763 pr_err("cannot create %s procfs entry\n", PGCTRL); 3764 ret = -EINVAL; 3765 goto remove; 3766 } 3767 3768 for_each_online_cpu(cpu) { 3769 int err; 3770 3771 err = pktgen_create_thread(cpu, pn); 3772 if (err) 3773 pr_warn("Cannot create thread for cpu %d (%d)\n", 3774 cpu, err); 3775 } 3776 3777 if (list_empty(&pn->pktgen_threads)) { 3778 pr_err("Initialization failed for all threads\n"); 3779 ret = -ENODEV; 3780 goto remove_entry; 3781 } 3782 3783 return 0; 3784 3785 remove_entry: 3786 remove_proc_entry(PGCTRL, pn->proc_dir); 3787 remove: 3788 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3789 return ret; 3790 } 3791 3792 static void __net_exit pg_net_exit(struct net *net) 3793 { 3794 struct pktgen_net *pn = net_generic(net, pg_net_id); 3795 struct pktgen_thread *t; 3796 struct list_head *q, *n; 3797 LIST_HEAD(list); 3798 3799 /* Stop all interfaces & threads */ 3800 pn->pktgen_exiting = true; 3801 3802 mutex_lock(&pktgen_thread_lock); 3803 list_splice_init(&pn->pktgen_threads, &list); 3804 mutex_unlock(&pktgen_thread_lock); 3805 3806 list_for_each_safe(q, n, &list) { 3807 t = list_entry(q, struct pktgen_thread, th_list); 3808 list_del(&t->th_list); 3809 kthread_stop(t->tsk); 3810 kfree(t); 3811 } 3812 3813 remove_proc_entry(PGCTRL, pn->proc_dir); 3814 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3815 } 3816 3817 static struct pernet_operations pg_net_ops = { 3818 .init = pg_net_init, 3819 .exit = pg_net_exit, 3820 .id = &pg_net_id, 3821 .size = sizeof(struct pktgen_net), 3822 }; 3823 3824 static int __init pg_init(void) 3825 { 3826 int ret = 0; 3827 3828 pr_info("%s", version); 3829 ret = register_pernet_subsys(&pg_net_ops); 3830 if (ret) 3831 return ret; 3832 ret = register_netdevice_notifier(&pktgen_notifier_block); 3833 if (ret) 3834 unregister_pernet_subsys(&pg_net_ops); 3835 3836 return ret; 3837 } 3838 3839 static void __exit pg_cleanup(void) 3840 { 3841 unregister_netdevice_notifier(&pktgen_notifier_block); 3842 unregister_pernet_subsys(&pg_net_ops); 3843 /* Don't need rcu_barrier() due to use of kfree_rcu() */ 3844 } 3845 3846 module_init(pg_init); 3847 module_exit(pg_cleanup); 3848 3849 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3850 MODULE_DESCRIPTION("Packet Generator tool"); 3851 MODULE_LICENSE("GPL"); 3852 MODULE_VERSION(VERSION); 3853 module_param(pg_count_d, int, 0); 3854 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3855 module_param(pg_delay_d, int, 0); 3856 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3857 module_param(pg_clone_skb_d, int, 0); 3858 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3859 module_param(debug, int, 0); 3860 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3861