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 "2.75" 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 /* Xmit modes */ 214 #define M_START_XMIT 0 /* Default normal TX */ 215 #define M_NETIF_RECEIVE 1 /* Inject packets into stack */ 216 217 /* If lock -- protects updating of if_list */ 218 #define if_lock(t) spin_lock(&(t->if_lock)); 219 #define if_unlock(t) spin_unlock(&(t->if_lock)); 220 221 /* Used to help with determining the pkts on receive */ 222 #define PKTGEN_MAGIC 0xbe9be955 223 #define PG_PROC_DIR "pktgen" 224 #define PGCTRL "pgctrl" 225 226 #define MAX_CFLOWS 65536 227 228 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 229 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 230 231 struct flow_state { 232 __be32 cur_daddr; 233 int count; 234 #ifdef CONFIG_XFRM 235 struct xfrm_state *x; 236 #endif 237 __u32 flags; 238 }; 239 240 /* flow flag bits */ 241 #define F_INIT (1<<0) /* flow has been initialized */ 242 243 struct pktgen_dev { 244 /* 245 * Try to keep frequent/infrequent used vars. separated. 246 */ 247 struct proc_dir_entry *entry; /* proc file */ 248 struct pktgen_thread *pg_thread;/* the owner */ 249 struct list_head list; /* chaining in the thread's run-queue */ 250 struct rcu_head rcu; /* freed by RCU */ 251 252 int running; /* if false, the test will stop */ 253 254 /* If min != max, then we will either do a linear iteration, or 255 * we will do a random selection from within the range. 256 */ 257 __u32 flags; 258 int xmit_mode; 259 int min_pkt_size; 260 int max_pkt_size; 261 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 262 int nfrags; 263 int removal_mark; /* non-zero => the device is marked for 264 * removal by worker thread */ 265 266 struct page *page; 267 u64 delay; /* nano-seconds */ 268 269 __u64 count; /* Default No packets to send */ 270 __u64 sofar; /* How many pkts we've sent so far */ 271 __u64 tx_bytes; /* How many bytes we've transmitted */ 272 __u64 errors; /* Errors when trying to transmit, */ 273 274 /* runtime counters relating to clone_skb */ 275 276 __u64 allocated_skbs; 277 __u32 clone_count; 278 int last_ok; /* Was last skb sent? 279 * Or a failed transmit of some sort? 280 * This will keep sequence numbers in order 281 */ 282 ktime_t next_tx; 283 ktime_t started_at; 284 ktime_t stopped_at; 285 u64 idle_acc; /* nano-seconds */ 286 287 __u32 seq_num; 288 289 int clone_skb; /* 290 * Use multiple SKBs during packet gen. 291 * If this number is greater than 1, then 292 * that many copies of the same packet will be 293 * sent before a new packet is allocated. 294 * If you want to send 1024 identical packets 295 * before creating a new packet, 296 * set clone_skb to 1024. 297 */ 298 299 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 300 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 301 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 302 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 303 304 struct in6_addr in6_saddr; 305 struct in6_addr in6_daddr; 306 struct in6_addr cur_in6_daddr; 307 struct in6_addr cur_in6_saddr; 308 /* For ranges */ 309 struct in6_addr min_in6_daddr; 310 struct in6_addr max_in6_daddr; 311 struct in6_addr min_in6_saddr; 312 struct in6_addr max_in6_saddr; 313 314 /* If we're doing ranges, random or incremental, then this 315 * defines the min/max for those ranges. 316 */ 317 __be32 saddr_min; /* inclusive, source IP address */ 318 __be32 saddr_max; /* exclusive, source IP address */ 319 __be32 daddr_min; /* inclusive, dest IP address */ 320 __be32 daddr_max; /* exclusive, dest IP address */ 321 322 __u16 udp_src_min; /* inclusive, source UDP port */ 323 __u16 udp_src_max; /* exclusive, source UDP port */ 324 __u16 udp_dst_min; /* inclusive, dest UDP port */ 325 __u16 udp_dst_max; /* exclusive, dest UDP port */ 326 327 /* DSCP + ECN */ 328 __u8 tos; /* six MSB of (former) IPv4 TOS 329 are for dscp codepoint */ 330 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 331 (see RFC 3260, sec. 4) */ 332 333 /* MPLS */ 334 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 335 __be32 labels[MAX_MPLS_LABELS]; 336 337 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 338 __u8 vlan_p; 339 __u8 vlan_cfi; 340 __u16 vlan_id; /* 0xffff means no vlan tag */ 341 342 __u8 svlan_p; 343 __u8 svlan_cfi; 344 __u16 svlan_id; /* 0xffff means no svlan tag */ 345 346 __u32 src_mac_count; /* How many MACs to iterate through */ 347 __u32 dst_mac_count; /* How many MACs to iterate through */ 348 349 unsigned char dst_mac[ETH_ALEN]; 350 unsigned char src_mac[ETH_ALEN]; 351 352 __u32 cur_dst_mac_offset; 353 __u32 cur_src_mac_offset; 354 __be32 cur_saddr; 355 __be32 cur_daddr; 356 __u16 ip_id; 357 __u16 cur_udp_dst; 358 __u16 cur_udp_src; 359 __u16 cur_queue_map; 360 __u32 cur_pkt_size; 361 __u32 last_pkt_size; 362 363 __u8 hh[14]; 364 /* = { 365 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 366 367 We fill in SRC address later 368 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 369 0x08, 0x00 370 }; 371 */ 372 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 373 374 struct sk_buff *skb; /* skb we are to transmit next, used for when we 375 * are transmitting the same one multiple times 376 */ 377 struct net_device *odev; /* The out-going device. 378 * Note that the device should have it's 379 * pg_info pointer pointing back to this 380 * device. 381 * Set when the user specifies the out-going 382 * device name (not when the inject is 383 * started as it used to do.) 384 */ 385 char odevname[32]; 386 struct flow_state *flows; 387 unsigned int cflows; /* Concurrent flows (config) */ 388 unsigned int lflow; /* Flow length (config) */ 389 unsigned int nflows; /* accumulated flows (stats) */ 390 unsigned int curfl; /* current sequenced flow (state)*/ 391 392 u16 queue_map_min; 393 u16 queue_map_max; 394 __u32 skb_priority; /* skb priority field */ 395 unsigned int burst; /* number of duplicated packets to burst */ 396 int node; /* Memory node */ 397 398 #ifdef CONFIG_XFRM 399 __u8 ipsmode; /* IPSEC mode (config) */ 400 __u8 ipsproto; /* IPSEC type (config) */ 401 __u32 spi; 402 struct dst_entry dst; 403 struct dst_ops dstops; 404 #endif 405 char result[512]; 406 }; 407 408 struct pktgen_hdr { 409 __be32 pgh_magic; 410 __be32 seq_num; 411 __be32 tv_sec; 412 __be32 tv_usec; 413 }; 414 415 416 static int pg_net_id __read_mostly; 417 418 struct pktgen_net { 419 struct net *net; 420 struct proc_dir_entry *proc_dir; 421 struct list_head pktgen_threads; 422 bool pktgen_exiting; 423 }; 424 425 struct pktgen_thread { 426 spinlock_t if_lock; /* for list of devices */ 427 struct list_head if_list; /* All device here */ 428 struct list_head th_list; 429 struct task_struct *tsk; 430 char result[512]; 431 432 /* Field for thread to receive "posted" events terminate, 433 stop ifs etc. */ 434 435 u32 control; 436 int cpu; 437 438 wait_queue_head_t queue; 439 struct completion start_done; 440 struct pktgen_net *net; 441 }; 442 443 #define REMOVE 1 444 #define FIND 0 445 446 static const char version[] = 447 "Packet Generator for packet performance testing. " 448 "Version: " VERSION "\n"; 449 450 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 451 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 452 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 453 const char *ifname, bool exact); 454 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 455 static void pktgen_run_all_threads(struct pktgen_net *pn); 456 static void pktgen_reset_all_threads(struct pktgen_net *pn); 457 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); 458 459 static void pktgen_stop(struct pktgen_thread *t); 460 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 461 462 /* Module parameters, defaults. */ 463 static int pg_count_d __read_mostly = 1000; 464 static int pg_delay_d __read_mostly; 465 static int pg_clone_skb_d __read_mostly; 466 static int debug __read_mostly; 467 468 static DEFINE_MUTEX(pktgen_thread_lock); 469 470 static struct notifier_block pktgen_notifier_block = { 471 .notifier_call = pktgen_device_event, 472 }; 473 474 /* 475 * /proc handling functions 476 * 477 */ 478 479 static int pgctrl_show(struct seq_file *seq, void *v) 480 { 481 seq_puts(seq, version); 482 return 0; 483 } 484 485 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 486 size_t count, loff_t *ppos) 487 { 488 char data[128]; 489 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 490 491 if (!capable(CAP_NET_ADMIN)) 492 return -EPERM; 493 494 if (count == 0) 495 return -EINVAL; 496 497 if (count > sizeof(data)) 498 count = sizeof(data); 499 500 if (copy_from_user(data, buf, count)) 501 return -EFAULT; 502 503 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */ 504 505 if (!strcmp(data, "stop")) 506 pktgen_stop_all_threads_ifs(pn); 507 508 else if (!strcmp(data, "start")) 509 pktgen_run_all_threads(pn); 510 511 else if (!strcmp(data, "reset")) 512 pktgen_reset_all_threads(pn); 513 514 else 515 return -EINVAL; 516 517 return count; 518 } 519 520 static int pgctrl_open(struct inode *inode, struct file *file) 521 { 522 return single_open(file, pgctrl_show, PDE_DATA(inode)); 523 } 524 525 static const struct file_operations pktgen_fops = { 526 .owner = THIS_MODULE, 527 .open = pgctrl_open, 528 .read = seq_read, 529 .llseek = seq_lseek, 530 .write = pgctrl_write, 531 .release = single_release, 532 }; 533 534 static int pktgen_if_show(struct seq_file *seq, void *v) 535 { 536 const struct pktgen_dev *pkt_dev = seq->private; 537 ktime_t stopped; 538 u64 idle; 539 540 seq_printf(seq, 541 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 542 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 543 pkt_dev->max_pkt_size); 544 545 seq_printf(seq, 546 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 547 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 548 pkt_dev->clone_skb, pkt_dev->odevname); 549 550 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 551 pkt_dev->lflow); 552 553 seq_printf(seq, 554 " queue_map_min: %u queue_map_max: %u\n", 555 pkt_dev->queue_map_min, 556 pkt_dev->queue_map_max); 557 558 if (pkt_dev->skb_priority) 559 seq_printf(seq, " skb_priority: %u\n", 560 pkt_dev->skb_priority); 561 562 if (pkt_dev->flags & F_IPV6) { 563 seq_printf(seq, 564 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 565 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 566 &pkt_dev->in6_saddr, 567 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 568 &pkt_dev->in6_daddr, 569 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 570 } else { 571 seq_printf(seq, 572 " dst_min: %s dst_max: %s\n", 573 pkt_dev->dst_min, pkt_dev->dst_max); 574 seq_printf(seq, 575 " src_min: %s src_max: %s\n", 576 pkt_dev->src_min, pkt_dev->src_max); 577 } 578 579 seq_puts(seq, " src_mac: "); 580 581 seq_printf(seq, "%pM ", 582 is_zero_ether_addr(pkt_dev->src_mac) ? 583 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 584 585 seq_puts(seq, "dst_mac: "); 586 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 587 588 seq_printf(seq, 589 " udp_src_min: %d udp_src_max: %d" 590 " udp_dst_min: %d udp_dst_max: %d\n", 591 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 592 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 593 594 seq_printf(seq, 595 " src_mac_count: %d dst_mac_count: %d\n", 596 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 597 598 if (pkt_dev->nr_labels) { 599 unsigned int i; 600 seq_puts(seq, " mpls: "); 601 for (i = 0; i < pkt_dev->nr_labels; i++) 602 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 603 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 604 } 605 606 if (pkt_dev->vlan_id != 0xffff) 607 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 608 pkt_dev->vlan_id, pkt_dev->vlan_p, 609 pkt_dev->vlan_cfi); 610 611 if (pkt_dev->svlan_id != 0xffff) 612 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 613 pkt_dev->svlan_id, pkt_dev->svlan_p, 614 pkt_dev->svlan_cfi); 615 616 if (pkt_dev->tos) 617 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 618 619 if (pkt_dev->traffic_class) 620 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 621 622 if (pkt_dev->burst > 1) 623 seq_printf(seq, " burst: %d\n", pkt_dev->burst); 624 625 if (pkt_dev->node >= 0) 626 seq_printf(seq, " node: %d\n", pkt_dev->node); 627 628 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) 629 seq_puts(seq, " xmit_mode: netif_receive\n"); 630 631 seq_puts(seq, " Flags: "); 632 633 if (pkt_dev->flags & F_IPV6) 634 seq_puts(seq, "IPV6 "); 635 636 if (pkt_dev->flags & F_IPSRC_RND) 637 seq_puts(seq, "IPSRC_RND "); 638 639 if (pkt_dev->flags & F_IPDST_RND) 640 seq_puts(seq, "IPDST_RND "); 641 642 if (pkt_dev->flags & F_TXSIZE_RND) 643 seq_puts(seq, "TXSIZE_RND "); 644 645 if (pkt_dev->flags & F_UDPSRC_RND) 646 seq_puts(seq, "UDPSRC_RND "); 647 648 if (pkt_dev->flags & F_UDPDST_RND) 649 seq_puts(seq, "UDPDST_RND "); 650 651 if (pkt_dev->flags & F_UDPCSUM) 652 seq_puts(seq, "UDPCSUM "); 653 654 if (pkt_dev->flags & F_NO_TIMESTAMP) 655 seq_puts(seq, "NO_TIMESTAMP "); 656 657 if (pkt_dev->flags & F_MPLS_RND) 658 seq_puts(seq, "MPLS_RND "); 659 660 if (pkt_dev->flags & F_QUEUE_MAP_RND) 661 seq_puts(seq, "QUEUE_MAP_RND "); 662 663 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 664 seq_puts(seq, "QUEUE_MAP_CPU "); 665 666 if (pkt_dev->cflows) { 667 if (pkt_dev->flags & F_FLOW_SEQ) 668 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/ 669 else 670 seq_puts(seq, "FLOW_RND "); 671 } 672 673 #ifdef CONFIG_XFRM 674 if (pkt_dev->flags & F_IPSEC_ON) { 675 seq_puts(seq, "IPSEC "); 676 if (pkt_dev->spi) 677 seq_printf(seq, "spi:%u", pkt_dev->spi); 678 } 679 #endif 680 681 if (pkt_dev->flags & F_MACSRC_RND) 682 seq_puts(seq, "MACSRC_RND "); 683 684 if (pkt_dev->flags & F_MACDST_RND) 685 seq_puts(seq, "MACDST_RND "); 686 687 if (pkt_dev->flags & F_VID_RND) 688 seq_puts(seq, "VID_RND "); 689 690 if (pkt_dev->flags & F_SVID_RND) 691 seq_puts(seq, "SVID_RND "); 692 693 if (pkt_dev->flags & F_NODE) 694 seq_puts(seq, "NODE_ALLOC "); 695 696 seq_puts(seq, "\n"); 697 698 /* not really stopped, more like last-running-at */ 699 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 700 idle = pkt_dev->idle_acc; 701 do_div(idle, NSEC_PER_USEC); 702 703 seq_printf(seq, 704 "Current:\n pkts-sofar: %llu errors: %llu\n", 705 (unsigned long long)pkt_dev->sofar, 706 (unsigned long long)pkt_dev->errors); 707 708 seq_printf(seq, 709 " started: %lluus stopped: %lluus idle: %lluus\n", 710 (unsigned long long) ktime_to_us(pkt_dev->started_at), 711 (unsigned long long) ktime_to_us(stopped), 712 (unsigned long long) idle); 713 714 seq_printf(seq, 715 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 716 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 717 pkt_dev->cur_src_mac_offset); 718 719 if (pkt_dev->flags & F_IPV6) { 720 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 721 &pkt_dev->cur_in6_saddr, 722 &pkt_dev->cur_in6_daddr); 723 } else 724 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 725 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 726 727 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 728 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 729 730 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 731 732 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 733 734 if (pkt_dev->result[0]) 735 seq_printf(seq, "Result: %s\n", pkt_dev->result); 736 else 737 seq_puts(seq, "Result: Idle\n"); 738 739 return 0; 740 } 741 742 743 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 744 __u32 *num) 745 { 746 int i = 0; 747 *num = 0; 748 749 for (; i < maxlen; i++) { 750 int value; 751 char c; 752 *num <<= 4; 753 if (get_user(c, &user_buffer[i])) 754 return -EFAULT; 755 value = hex_to_bin(c); 756 if (value >= 0) 757 *num |= value; 758 else 759 break; 760 } 761 return i; 762 } 763 764 static int count_trail_chars(const char __user * user_buffer, 765 unsigned int maxlen) 766 { 767 int i; 768 769 for (i = 0; i < maxlen; i++) { 770 char c; 771 if (get_user(c, &user_buffer[i])) 772 return -EFAULT; 773 switch (c) { 774 case '\"': 775 case '\n': 776 case '\r': 777 case '\t': 778 case ' ': 779 case '=': 780 break; 781 default: 782 goto done; 783 } 784 } 785 done: 786 return i; 787 } 788 789 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 790 unsigned long *num) 791 { 792 int i; 793 *num = 0; 794 795 for (i = 0; i < maxlen; i++) { 796 char c; 797 if (get_user(c, &user_buffer[i])) 798 return -EFAULT; 799 if ((c >= '0') && (c <= '9')) { 800 *num *= 10; 801 *num += c - '0'; 802 } else 803 break; 804 } 805 return i; 806 } 807 808 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 809 { 810 int i; 811 812 for (i = 0; i < maxlen; i++) { 813 char c; 814 if (get_user(c, &user_buffer[i])) 815 return -EFAULT; 816 switch (c) { 817 case '\"': 818 case '\n': 819 case '\r': 820 case '\t': 821 case ' ': 822 goto done_str; 823 default: 824 break; 825 } 826 } 827 done_str: 828 return i; 829 } 830 831 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 832 { 833 unsigned int n = 0; 834 char c; 835 ssize_t i = 0; 836 int len; 837 838 pkt_dev->nr_labels = 0; 839 do { 840 __u32 tmp; 841 len = hex32_arg(&buffer[i], 8, &tmp); 842 if (len <= 0) 843 return len; 844 pkt_dev->labels[n] = htonl(tmp); 845 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 846 pkt_dev->flags |= F_MPLS_RND; 847 i += len; 848 if (get_user(c, &buffer[i])) 849 return -EFAULT; 850 i++; 851 n++; 852 if (n >= MAX_MPLS_LABELS) 853 return -E2BIG; 854 } while (c == ','); 855 856 pkt_dev->nr_labels = n; 857 return i; 858 } 859 860 static ssize_t pktgen_if_write(struct file *file, 861 const char __user * user_buffer, size_t count, 862 loff_t * offset) 863 { 864 struct seq_file *seq = file->private_data; 865 struct pktgen_dev *pkt_dev = seq->private; 866 int i, max, len; 867 char name[16], valstr[32]; 868 unsigned long value = 0; 869 char *pg_result = NULL; 870 int tmp = 0; 871 char buf[128]; 872 873 pg_result = &(pkt_dev->result[0]); 874 875 if (count < 1) { 876 pr_warn("wrong command format\n"); 877 return -EINVAL; 878 } 879 880 max = count; 881 tmp = count_trail_chars(user_buffer, max); 882 if (tmp < 0) { 883 pr_warn("illegal format\n"); 884 return tmp; 885 } 886 i = tmp; 887 888 /* Read variable name */ 889 890 len = strn_len(&user_buffer[i], sizeof(name) - 1); 891 if (len < 0) 892 return len; 893 894 memset(name, 0, sizeof(name)); 895 if (copy_from_user(name, &user_buffer[i], len)) 896 return -EFAULT; 897 i += len; 898 899 max = count - i; 900 len = count_trail_chars(&user_buffer[i], max); 901 if (len < 0) 902 return len; 903 904 i += len; 905 906 if (debug) { 907 size_t copy = min_t(size_t, count, 1023); 908 char tb[copy + 1]; 909 if (copy_from_user(tb, user_buffer, copy)) 910 return -EFAULT; 911 tb[copy] = 0; 912 pr_debug("%s,%lu buffer -:%s:-\n", 913 name, (unsigned long)count, tb); 914 } 915 916 if (!strcmp(name, "min_pkt_size")) { 917 len = num_arg(&user_buffer[i], 10, &value); 918 if (len < 0) 919 return len; 920 921 i += len; 922 if (value < 14 + 20 + 8) 923 value = 14 + 20 + 8; 924 if (value != pkt_dev->min_pkt_size) { 925 pkt_dev->min_pkt_size = value; 926 pkt_dev->cur_pkt_size = value; 927 } 928 sprintf(pg_result, "OK: min_pkt_size=%u", 929 pkt_dev->min_pkt_size); 930 return count; 931 } 932 933 if (!strcmp(name, "max_pkt_size")) { 934 len = num_arg(&user_buffer[i], 10, &value); 935 if (len < 0) 936 return len; 937 938 i += len; 939 if (value < 14 + 20 + 8) 940 value = 14 + 20 + 8; 941 if (value != pkt_dev->max_pkt_size) { 942 pkt_dev->max_pkt_size = value; 943 pkt_dev->cur_pkt_size = value; 944 } 945 sprintf(pg_result, "OK: max_pkt_size=%u", 946 pkt_dev->max_pkt_size); 947 return count; 948 } 949 950 /* Shortcut for min = max */ 951 952 if (!strcmp(name, "pkt_size")) { 953 len = num_arg(&user_buffer[i], 10, &value); 954 if (len < 0) 955 return len; 956 957 i += len; 958 if (value < 14 + 20 + 8) 959 value = 14 + 20 + 8; 960 if (value != pkt_dev->min_pkt_size) { 961 pkt_dev->min_pkt_size = value; 962 pkt_dev->max_pkt_size = value; 963 pkt_dev->cur_pkt_size = value; 964 } 965 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 966 return count; 967 } 968 969 if (!strcmp(name, "debug")) { 970 len = num_arg(&user_buffer[i], 10, &value); 971 if (len < 0) 972 return len; 973 974 i += len; 975 debug = value; 976 sprintf(pg_result, "OK: debug=%u", debug); 977 return count; 978 } 979 980 if (!strcmp(name, "frags")) { 981 len = num_arg(&user_buffer[i], 10, &value); 982 if (len < 0) 983 return len; 984 985 i += len; 986 pkt_dev->nfrags = value; 987 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 988 return count; 989 } 990 if (!strcmp(name, "delay")) { 991 len = num_arg(&user_buffer[i], 10, &value); 992 if (len < 0) 993 return len; 994 995 i += len; 996 if (value == 0x7FFFFFFF) 997 pkt_dev->delay = ULLONG_MAX; 998 else 999 pkt_dev->delay = (u64)value; 1000 1001 sprintf(pg_result, "OK: delay=%llu", 1002 (unsigned long long) pkt_dev->delay); 1003 return count; 1004 } 1005 if (!strcmp(name, "rate")) { 1006 len = num_arg(&user_buffer[i], 10, &value); 1007 if (len < 0) 1008 return len; 1009 1010 i += len; 1011 if (!value) 1012 return len; 1013 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 1014 if (debug) 1015 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1016 1017 sprintf(pg_result, "OK: rate=%lu", value); 1018 return count; 1019 } 1020 if (!strcmp(name, "ratep")) { 1021 len = num_arg(&user_buffer[i], 10, &value); 1022 if (len < 0) 1023 return len; 1024 1025 i += len; 1026 if (!value) 1027 return len; 1028 pkt_dev->delay = NSEC_PER_SEC/value; 1029 if (debug) 1030 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1031 1032 sprintf(pg_result, "OK: rate=%lu", value); 1033 return count; 1034 } 1035 if (!strcmp(name, "udp_src_min")) { 1036 len = num_arg(&user_buffer[i], 10, &value); 1037 if (len < 0) 1038 return len; 1039 1040 i += len; 1041 if (value != pkt_dev->udp_src_min) { 1042 pkt_dev->udp_src_min = value; 1043 pkt_dev->cur_udp_src = value; 1044 } 1045 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1046 return count; 1047 } 1048 if (!strcmp(name, "udp_dst_min")) { 1049 len = num_arg(&user_buffer[i], 10, &value); 1050 if (len < 0) 1051 return len; 1052 1053 i += len; 1054 if (value != pkt_dev->udp_dst_min) { 1055 pkt_dev->udp_dst_min = value; 1056 pkt_dev->cur_udp_dst = value; 1057 } 1058 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1059 return count; 1060 } 1061 if (!strcmp(name, "udp_src_max")) { 1062 len = num_arg(&user_buffer[i], 10, &value); 1063 if (len < 0) 1064 return len; 1065 1066 i += len; 1067 if (value != pkt_dev->udp_src_max) { 1068 pkt_dev->udp_src_max = value; 1069 pkt_dev->cur_udp_src = value; 1070 } 1071 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1072 return count; 1073 } 1074 if (!strcmp(name, "udp_dst_max")) { 1075 len = num_arg(&user_buffer[i], 10, &value); 1076 if (len < 0) 1077 return len; 1078 1079 i += len; 1080 if (value != pkt_dev->udp_dst_max) { 1081 pkt_dev->udp_dst_max = value; 1082 pkt_dev->cur_udp_dst = value; 1083 } 1084 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1085 return count; 1086 } 1087 if (!strcmp(name, "clone_skb")) { 1088 len = num_arg(&user_buffer[i], 10, &value); 1089 if (len < 0) 1090 return len; 1091 if ((value > 0) && 1092 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) || 1093 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1094 return -ENOTSUPP; 1095 i += len; 1096 pkt_dev->clone_skb = value; 1097 1098 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1099 return count; 1100 } 1101 if (!strcmp(name, "count")) { 1102 len = num_arg(&user_buffer[i], 10, &value); 1103 if (len < 0) 1104 return len; 1105 1106 i += len; 1107 pkt_dev->count = value; 1108 sprintf(pg_result, "OK: count=%llu", 1109 (unsigned long long)pkt_dev->count); 1110 return count; 1111 } 1112 if (!strcmp(name, "src_mac_count")) { 1113 len = num_arg(&user_buffer[i], 10, &value); 1114 if (len < 0) 1115 return len; 1116 1117 i += len; 1118 if (pkt_dev->src_mac_count != value) { 1119 pkt_dev->src_mac_count = value; 1120 pkt_dev->cur_src_mac_offset = 0; 1121 } 1122 sprintf(pg_result, "OK: src_mac_count=%d", 1123 pkt_dev->src_mac_count); 1124 return count; 1125 } 1126 if (!strcmp(name, "dst_mac_count")) { 1127 len = num_arg(&user_buffer[i], 10, &value); 1128 if (len < 0) 1129 return len; 1130 1131 i += len; 1132 if (pkt_dev->dst_mac_count != value) { 1133 pkt_dev->dst_mac_count = value; 1134 pkt_dev->cur_dst_mac_offset = 0; 1135 } 1136 sprintf(pg_result, "OK: dst_mac_count=%d", 1137 pkt_dev->dst_mac_count); 1138 return count; 1139 } 1140 if (!strcmp(name, "burst")) { 1141 len = num_arg(&user_buffer[i], 10, &value); 1142 if (len < 0) 1143 return len; 1144 1145 i += len; 1146 if ((value > 1) && (pkt_dev->xmit_mode == M_START_XMIT) && 1147 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1148 return -ENOTSUPP; 1149 pkt_dev->burst = value < 1 ? 1 : value; 1150 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst); 1151 return count; 1152 } 1153 if (!strcmp(name, "node")) { 1154 len = num_arg(&user_buffer[i], 10, &value); 1155 if (len < 0) 1156 return len; 1157 1158 i += len; 1159 1160 if (node_possible(value)) { 1161 pkt_dev->node = value; 1162 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1163 if (pkt_dev->page) { 1164 put_page(pkt_dev->page); 1165 pkt_dev->page = NULL; 1166 } 1167 } 1168 else 1169 sprintf(pg_result, "ERROR: node not possible"); 1170 return count; 1171 } 1172 if (!strcmp(name, "xmit_mode")) { 1173 char f[32]; 1174 1175 memset(f, 0, 32); 1176 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1177 if (len < 0) 1178 return len; 1179 1180 if (copy_from_user(f, &user_buffer[i], len)) 1181 return -EFAULT; 1182 i += len; 1183 1184 if (strcmp(f, "start_xmit") == 0) { 1185 pkt_dev->xmit_mode = M_START_XMIT; 1186 } else if (strcmp(f, "netif_receive") == 0) { 1187 /* clone_skb set earlier, not supported in this mode */ 1188 if (pkt_dev->clone_skb > 0) 1189 return -ENOTSUPP; 1190 1191 pkt_dev->xmit_mode = M_NETIF_RECEIVE; 1192 1193 /* make sure new packet is allocated every time 1194 * pktgen_xmit() is called 1195 */ 1196 pkt_dev->last_ok = 1; 1197 1198 /* override clone_skb if user passed default value 1199 * at module loading time 1200 */ 1201 pkt_dev->clone_skb = 0; 1202 } else { 1203 sprintf(pg_result, 1204 "xmit_mode -:%s:- unknown\nAvailable modes: %s", 1205 f, "start_xmit, netif_receive\n"); 1206 return count; 1207 } 1208 sprintf(pg_result, "OK: xmit_mode=%s", f); 1209 return count; 1210 } 1211 if (!strcmp(name, "flag")) { 1212 char f[32]; 1213 memset(f, 0, 32); 1214 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1215 if (len < 0) 1216 return len; 1217 1218 if (copy_from_user(f, &user_buffer[i], len)) 1219 return -EFAULT; 1220 i += len; 1221 if (strcmp(f, "IPSRC_RND") == 0) 1222 pkt_dev->flags |= F_IPSRC_RND; 1223 1224 else if (strcmp(f, "!IPSRC_RND") == 0) 1225 pkt_dev->flags &= ~F_IPSRC_RND; 1226 1227 else if (strcmp(f, "TXSIZE_RND") == 0) 1228 pkt_dev->flags |= F_TXSIZE_RND; 1229 1230 else if (strcmp(f, "!TXSIZE_RND") == 0) 1231 pkt_dev->flags &= ~F_TXSIZE_RND; 1232 1233 else if (strcmp(f, "IPDST_RND") == 0) 1234 pkt_dev->flags |= F_IPDST_RND; 1235 1236 else if (strcmp(f, "!IPDST_RND") == 0) 1237 pkt_dev->flags &= ~F_IPDST_RND; 1238 1239 else if (strcmp(f, "UDPSRC_RND") == 0) 1240 pkt_dev->flags |= F_UDPSRC_RND; 1241 1242 else if (strcmp(f, "!UDPSRC_RND") == 0) 1243 pkt_dev->flags &= ~F_UDPSRC_RND; 1244 1245 else if (strcmp(f, "UDPDST_RND") == 0) 1246 pkt_dev->flags |= F_UDPDST_RND; 1247 1248 else if (strcmp(f, "!UDPDST_RND") == 0) 1249 pkt_dev->flags &= ~F_UDPDST_RND; 1250 1251 else if (strcmp(f, "MACSRC_RND") == 0) 1252 pkt_dev->flags |= F_MACSRC_RND; 1253 1254 else if (strcmp(f, "!MACSRC_RND") == 0) 1255 pkt_dev->flags &= ~F_MACSRC_RND; 1256 1257 else if (strcmp(f, "MACDST_RND") == 0) 1258 pkt_dev->flags |= F_MACDST_RND; 1259 1260 else if (strcmp(f, "!MACDST_RND") == 0) 1261 pkt_dev->flags &= ~F_MACDST_RND; 1262 1263 else if (strcmp(f, "MPLS_RND") == 0) 1264 pkt_dev->flags |= F_MPLS_RND; 1265 1266 else if (strcmp(f, "!MPLS_RND") == 0) 1267 pkt_dev->flags &= ~F_MPLS_RND; 1268 1269 else if (strcmp(f, "VID_RND") == 0) 1270 pkt_dev->flags |= F_VID_RND; 1271 1272 else if (strcmp(f, "!VID_RND") == 0) 1273 pkt_dev->flags &= ~F_VID_RND; 1274 1275 else if (strcmp(f, "SVID_RND") == 0) 1276 pkt_dev->flags |= F_SVID_RND; 1277 1278 else if (strcmp(f, "!SVID_RND") == 0) 1279 pkt_dev->flags &= ~F_SVID_RND; 1280 1281 else if (strcmp(f, "FLOW_SEQ") == 0) 1282 pkt_dev->flags |= F_FLOW_SEQ; 1283 1284 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1285 pkt_dev->flags |= F_QUEUE_MAP_RND; 1286 1287 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1288 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1289 1290 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1291 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1292 1293 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1294 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1295 #ifdef CONFIG_XFRM 1296 else if (strcmp(f, "IPSEC") == 0) 1297 pkt_dev->flags |= F_IPSEC_ON; 1298 #endif 1299 1300 else if (strcmp(f, "!IPV6") == 0) 1301 pkt_dev->flags &= ~F_IPV6; 1302 1303 else if (strcmp(f, "NODE_ALLOC") == 0) 1304 pkt_dev->flags |= F_NODE; 1305 1306 else if (strcmp(f, "!NODE_ALLOC") == 0) 1307 pkt_dev->flags &= ~F_NODE; 1308 1309 else if (strcmp(f, "UDPCSUM") == 0) 1310 pkt_dev->flags |= F_UDPCSUM; 1311 1312 else if (strcmp(f, "!UDPCSUM") == 0) 1313 pkt_dev->flags &= ~F_UDPCSUM; 1314 1315 else if (strcmp(f, "NO_TIMESTAMP") == 0) 1316 pkt_dev->flags |= F_NO_TIMESTAMP; 1317 1318 else if (strcmp(f, "!NO_TIMESTAMP") == 0) 1319 pkt_dev->flags &= ~F_NO_TIMESTAMP; 1320 1321 else { 1322 sprintf(pg_result, 1323 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1324 f, 1325 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1326 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " 1327 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " 1328 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " 1329 "NO_TIMESTAMP, " 1330 #ifdef CONFIG_XFRM 1331 "IPSEC, " 1332 #endif 1333 "NODE_ALLOC\n"); 1334 return count; 1335 } 1336 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1337 return count; 1338 } 1339 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1340 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1341 if (len < 0) 1342 return len; 1343 1344 if (copy_from_user(buf, &user_buffer[i], len)) 1345 return -EFAULT; 1346 buf[len] = 0; 1347 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1348 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1349 strncpy(pkt_dev->dst_min, buf, len); 1350 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1351 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1352 } 1353 if (debug) 1354 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1355 i += len; 1356 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1357 return count; 1358 } 1359 if (!strcmp(name, "dst_max")) { 1360 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1361 if (len < 0) 1362 return len; 1363 1364 1365 if (copy_from_user(buf, &user_buffer[i], len)) 1366 return -EFAULT; 1367 1368 buf[len] = 0; 1369 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1370 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1371 strncpy(pkt_dev->dst_max, buf, len); 1372 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1373 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1374 } 1375 if (debug) 1376 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1377 i += len; 1378 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1379 return count; 1380 } 1381 if (!strcmp(name, "dst6")) { 1382 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1383 if (len < 0) 1384 return len; 1385 1386 pkt_dev->flags |= F_IPV6; 1387 1388 if (copy_from_user(buf, &user_buffer[i], len)) 1389 return -EFAULT; 1390 buf[len] = 0; 1391 1392 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1393 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1394 1395 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1396 1397 if (debug) 1398 pr_debug("dst6 set to: %s\n", buf); 1399 1400 i += len; 1401 sprintf(pg_result, "OK: dst6=%s", buf); 1402 return count; 1403 } 1404 if (!strcmp(name, "dst6_min")) { 1405 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1406 if (len < 0) 1407 return len; 1408 1409 pkt_dev->flags |= F_IPV6; 1410 1411 if (copy_from_user(buf, &user_buffer[i], len)) 1412 return -EFAULT; 1413 buf[len] = 0; 1414 1415 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1416 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1417 1418 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1419 if (debug) 1420 pr_debug("dst6_min set to: %s\n", buf); 1421 1422 i += len; 1423 sprintf(pg_result, "OK: dst6_min=%s", buf); 1424 return count; 1425 } 1426 if (!strcmp(name, "dst6_max")) { 1427 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1428 if (len < 0) 1429 return len; 1430 1431 pkt_dev->flags |= F_IPV6; 1432 1433 if (copy_from_user(buf, &user_buffer[i], len)) 1434 return -EFAULT; 1435 buf[len] = 0; 1436 1437 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1438 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1439 1440 if (debug) 1441 pr_debug("dst6_max set to: %s\n", buf); 1442 1443 i += len; 1444 sprintf(pg_result, "OK: dst6_max=%s", buf); 1445 return count; 1446 } 1447 if (!strcmp(name, "src6")) { 1448 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1449 if (len < 0) 1450 return len; 1451 1452 pkt_dev->flags |= F_IPV6; 1453 1454 if (copy_from_user(buf, &user_buffer[i], len)) 1455 return -EFAULT; 1456 buf[len] = 0; 1457 1458 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1459 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1460 1461 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1462 1463 if (debug) 1464 pr_debug("src6 set to: %s\n", buf); 1465 1466 i += len; 1467 sprintf(pg_result, "OK: src6=%s", buf); 1468 return count; 1469 } 1470 if (!strcmp(name, "src_min")) { 1471 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1472 if (len < 0) 1473 return len; 1474 1475 if (copy_from_user(buf, &user_buffer[i], len)) 1476 return -EFAULT; 1477 buf[len] = 0; 1478 if (strcmp(buf, pkt_dev->src_min) != 0) { 1479 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1480 strncpy(pkt_dev->src_min, buf, len); 1481 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1482 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1483 } 1484 if (debug) 1485 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1486 i += len; 1487 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1488 return count; 1489 } 1490 if (!strcmp(name, "src_max")) { 1491 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1492 if (len < 0) 1493 return len; 1494 1495 if (copy_from_user(buf, &user_buffer[i], len)) 1496 return -EFAULT; 1497 buf[len] = 0; 1498 if (strcmp(buf, pkt_dev->src_max) != 0) { 1499 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1500 strncpy(pkt_dev->src_max, buf, len); 1501 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1502 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1503 } 1504 if (debug) 1505 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1506 i += len; 1507 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1508 return count; 1509 } 1510 if (!strcmp(name, "dst_mac")) { 1511 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1512 if (len < 0) 1513 return len; 1514 1515 memset(valstr, 0, sizeof(valstr)); 1516 if (copy_from_user(valstr, &user_buffer[i], len)) 1517 return -EFAULT; 1518 1519 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1520 return -EINVAL; 1521 /* Set up Dest MAC */ 1522 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); 1523 1524 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1525 return count; 1526 } 1527 if (!strcmp(name, "src_mac")) { 1528 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1529 if (len < 0) 1530 return len; 1531 1532 memset(valstr, 0, sizeof(valstr)); 1533 if (copy_from_user(valstr, &user_buffer[i], len)) 1534 return -EFAULT; 1535 1536 if (!mac_pton(valstr, pkt_dev->src_mac)) 1537 return -EINVAL; 1538 /* Set up Src MAC */ 1539 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); 1540 1541 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1542 return count; 1543 } 1544 1545 if (!strcmp(name, "clear_counters")) { 1546 pktgen_clear_counters(pkt_dev); 1547 sprintf(pg_result, "OK: Clearing counters.\n"); 1548 return count; 1549 } 1550 1551 if (!strcmp(name, "flows")) { 1552 len = num_arg(&user_buffer[i], 10, &value); 1553 if (len < 0) 1554 return len; 1555 1556 i += len; 1557 if (value > MAX_CFLOWS) 1558 value = MAX_CFLOWS; 1559 1560 pkt_dev->cflows = value; 1561 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1562 return count; 1563 } 1564 #ifdef CONFIG_XFRM 1565 if (!strcmp(name, "spi")) { 1566 len = num_arg(&user_buffer[i], 10, &value); 1567 if (len < 0) 1568 return len; 1569 1570 i += len; 1571 pkt_dev->spi = value; 1572 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); 1573 return count; 1574 } 1575 #endif 1576 if (!strcmp(name, "flowlen")) { 1577 len = num_arg(&user_buffer[i], 10, &value); 1578 if (len < 0) 1579 return len; 1580 1581 i += len; 1582 pkt_dev->lflow = value; 1583 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1584 return count; 1585 } 1586 1587 if (!strcmp(name, "queue_map_min")) { 1588 len = num_arg(&user_buffer[i], 5, &value); 1589 if (len < 0) 1590 return len; 1591 1592 i += len; 1593 pkt_dev->queue_map_min = value; 1594 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1595 return count; 1596 } 1597 1598 if (!strcmp(name, "queue_map_max")) { 1599 len = num_arg(&user_buffer[i], 5, &value); 1600 if (len < 0) 1601 return len; 1602 1603 i += len; 1604 pkt_dev->queue_map_max = value; 1605 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1606 return count; 1607 } 1608 1609 if (!strcmp(name, "mpls")) { 1610 unsigned int n, cnt; 1611 1612 len = get_labels(&user_buffer[i], pkt_dev); 1613 if (len < 0) 1614 return len; 1615 i += len; 1616 cnt = sprintf(pg_result, "OK: mpls="); 1617 for (n = 0; n < pkt_dev->nr_labels; n++) 1618 cnt += sprintf(pg_result + cnt, 1619 "%08x%s", ntohl(pkt_dev->labels[n]), 1620 n == pkt_dev->nr_labels-1 ? "" : ","); 1621 1622 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1623 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1624 pkt_dev->svlan_id = 0xffff; 1625 1626 if (debug) 1627 pr_debug("VLAN/SVLAN auto turned off\n"); 1628 } 1629 return count; 1630 } 1631 1632 if (!strcmp(name, "vlan_id")) { 1633 len = num_arg(&user_buffer[i], 4, &value); 1634 if (len < 0) 1635 return len; 1636 1637 i += len; 1638 if (value <= 4095) { 1639 pkt_dev->vlan_id = value; /* turn on VLAN */ 1640 1641 if (debug) 1642 pr_debug("VLAN turned on\n"); 1643 1644 if (debug && pkt_dev->nr_labels) 1645 pr_debug("MPLS auto turned off\n"); 1646 1647 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1648 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1649 } else { 1650 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1651 pkt_dev->svlan_id = 0xffff; 1652 1653 if (debug) 1654 pr_debug("VLAN/SVLAN turned off\n"); 1655 } 1656 return count; 1657 } 1658 1659 if (!strcmp(name, "vlan_p")) { 1660 len = num_arg(&user_buffer[i], 1, &value); 1661 if (len < 0) 1662 return len; 1663 1664 i += len; 1665 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1666 pkt_dev->vlan_p = value; 1667 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1668 } else { 1669 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1670 } 1671 return count; 1672 } 1673 1674 if (!strcmp(name, "vlan_cfi")) { 1675 len = num_arg(&user_buffer[i], 1, &value); 1676 if (len < 0) 1677 return len; 1678 1679 i += len; 1680 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1681 pkt_dev->vlan_cfi = value; 1682 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1683 } else { 1684 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1685 } 1686 return count; 1687 } 1688 1689 if (!strcmp(name, "svlan_id")) { 1690 len = num_arg(&user_buffer[i], 4, &value); 1691 if (len < 0) 1692 return len; 1693 1694 i += len; 1695 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1696 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1697 1698 if (debug) 1699 pr_debug("SVLAN turned on\n"); 1700 1701 if (debug && pkt_dev->nr_labels) 1702 pr_debug("MPLS auto turned off\n"); 1703 1704 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1705 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1706 } else { 1707 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1708 pkt_dev->svlan_id = 0xffff; 1709 1710 if (debug) 1711 pr_debug("VLAN/SVLAN turned off\n"); 1712 } 1713 return count; 1714 } 1715 1716 if (!strcmp(name, "svlan_p")) { 1717 len = num_arg(&user_buffer[i], 1, &value); 1718 if (len < 0) 1719 return len; 1720 1721 i += len; 1722 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1723 pkt_dev->svlan_p = value; 1724 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1725 } else { 1726 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1727 } 1728 return count; 1729 } 1730 1731 if (!strcmp(name, "svlan_cfi")) { 1732 len = num_arg(&user_buffer[i], 1, &value); 1733 if (len < 0) 1734 return len; 1735 1736 i += len; 1737 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1738 pkt_dev->svlan_cfi = value; 1739 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1740 } else { 1741 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1742 } 1743 return count; 1744 } 1745 1746 if (!strcmp(name, "tos")) { 1747 __u32 tmp_value = 0; 1748 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1749 if (len < 0) 1750 return len; 1751 1752 i += len; 1753 if (len == 2) { 1754 pkt_dev->tos = tmp_value; 1755 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1756 } else { 1757 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1758 } 1759 return count; 1760 } 1761 1762 if (!strcmp(name, "traffic_class")) { 1763 __u32 tmp_value = 0; 1764 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1765 if (len < 0) 1766 return len; 1767 1768 i += len; 1769 if (len == 2) { 1770 pkt_dev->traffic_class = tmp_value; 1771 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1772 } else { 1773 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1774 } 1775 return count; 1776 } 1777 1778 if (!strcmp(name, "skb_priority")) { 1779 len = num_arg(&user_buffer[i], 9, &value); 1780 if (len < 0) 1781 return len; 1782 1783 i += len; 1784 pkt_dev->skb_priority = value; 1785 sprintf(pg_result, "OK: skb_priority=%i", 1786 pkt_dev->skb_priority); 1787 return count; 1788 } 1789 1790 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1791 return -EINVAL; 1792 } 1793 1794 static int pktgen_if_open(struct inode *inode, struct file *file) 1795 { 1796 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1797 } 1798 1799 static const struct file_operations pktgen_if_fops = { 1800 .owner = THIS_MODULE, 1801 .open = pktgen_if_open, 1802 .read = seq_read, 1803 .llseek = seq_lseek, 1804 .write = pktgen_if_write, 1805 .release = single_release, 1806 }; 1807 1808 static int pktgen_thread_show(struct seq_file *seq, void *v) 1809 { 1810 struct pktgen_thread *t = seq->private; 1811 const struct pktgen_dev *pkt_dev; 1812 1813 BUG_ON(!t); 1814 1815 seq_puts(seq, "Running: "); 1816 1817 rcu_read_lock(); 1818 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1819 if (pkt_dev->running) 1820 seq_printf(seq, "%s ", pkt_dev->odevname); 1821 1822 seq_puts(seq, "\nStopped: "); 1823 1824 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1825 if (!pkt_dev->running) 1826 seq_printf(seq, "%s ", pkt_dev->odevname); 1827 1828 if (t->result[0]) 1829 seq_printf(seq, "\nResult: %s\n", t->result); 1830 else 1831 seq_puts(seq, "\nResult: NA\n"); 1832 1833 rcu_read_unlock(); 1834 1835 return 0; 1836 } 1837 1838 static ssize_t pktgen_thread_write(struct file *file, 1839 const char __user * user_buffer, 1840 size_t count, loff_t * offset) 1841 { 1842 struct seq_file *seq = file->private_data; 1843 struct pktgen_thread *t = seq->private; 1844 int i, max, len, ret; 1845 char name[40]; 1846 char *pg_result; 1847 1848 if (count < 1) { 1849 // sprintf(pg_result, "Wrong command format"); 1850 return -EINVAL; 1851 } 1852 1853 max = count; 1854 len = count_trail_chars(user_buffer, max); 1855 if (len < 0) 1856 return len; 1857 1858 i = len; 1859 1860 /* Read variable name */ 1861 1862 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1863 if (len < 0) 1864 return len; 1865 1866 memset(name, 0, sizeof(name)); 1867 if (copy_from_user(name, &user_buffer[i], len)) 1868 return -EFAULT; 1869 i += len; 1870 1871 max = count - i; 1872 len = count_trail_chars(&user_buffer[i], max); 1873 if (len < 0) 1874 return len; 1875 1876 i += len; 1877 1878 if (debug) 1879 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1880 1881 if (!t) { 1882 pr_err("ERROR: No thread\n"); 1883 ret = -EINVAL; 1884 goto out; 1885 } 1886 1887 pg_result = &(t->result[0]); 1888 1889 if (!strcmp(name, "add_device")) { 1890 char f[32]; 1891 memset(f, 0, 32); 1892 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1893 if (len < 0) { 1894 ret = len; 1895 goto out; 1896 } 1897 if (copy_from_user(f, &user_buffer[i], len)) 1898 return -EFAULT; 1899 i += len; 1900 mutex_lock(&pktgen_thread_lock); 1901 ret = pktgen_add_device(t, f); 1902 mutex_unlock(&pktgen_thread_lock); 1903 if (!ret) { 1904 ret = count; 1905 sprintf(pg_result, "OK: add_device=%s", f); 1906 } else 1907 sprintf(pg_result, "ERROR: can not add device %s", f); 1908 goto out; 1909 } 1910 1911 if (!strcmp(name, "rem_device_all")) { 1912 mutex_lock(&pktgen_thread_lock); 1913 t->control |= T_REMDEVALL; 1914 mutex_unlock(&pktgen_thread_lock); 1915 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1916 ret = count; 1917 sprintf(pg_result, "OK: rem_device_all"); 1918 goto out; 1919 } 1920 1921 if (!strcmp(name, "max_before_softirq")) { 1922 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1923 ret = count; 1924 goto out; 1925 } 1926 1927 ret = -EINVAL; 1928 out: 1929 return ret; 1930 } 1931 1932 static int pktgen_thread_open(struct inode *inode, struct file *file) 1933 { 1934 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1935 } 1936 1937 static const struct file_operations pktgen_thread_fops = { 1938 .owner = THIS_MODULE, 1939 .open = pktgen_thread_open, 1940 .read = seq_read, 1941 .llseek = seq_lseek, 1942 .write = pktgen_thread_write, 1943 .release = single_release, 1944 }; 1945 1946 /* Think find or remove for NN */ 1947 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1948 const char *ifname, int remove) 1949 { 1950 struct pktgen_thread *t; 1951 struct pktgen_dev *pkt_dev = NULL; 1952 bool exact = (remove == FIND); 1953 1954 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1955 pkt_dev = pktgen_find_dev(t, ifname, exact); 1956 if (pkt_dev) { 1957 if (remove) { 1958 pkt_dev->removal_mark = 1; 1959 t->control |= T_REMDEV; 1960 } 1961 break; 1962 } 1963 } 1964 return pkt_dev; 1965 } 1966 1967 /* 1968 * mark a device for removal 1969 */ 1970 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1971 { 1972 struct pktgen_dev *pkt_dev = NULL; 1973 const int max_tries = 10, msec_per_try = 125; 1974 int i = 0; 1975 1976 mutex_lock(&pktgen_thread_lock); 1977 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1978 1979 while (1) { 1980 1981 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1982 if (pkt_dev == NULL) 1983 break; /* success */ 1984 1985 mutex_unlock(&pktgen_thread_lock); 1986 pr_debug("%s: waiting for %s to disappear....\n", 1987 __func__, ifname); 1988 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1989 mutex_lock(&pktgen_thread_lock); 1990 1991 if (++i >= max_tries) { 1992 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1993 __func__, msec_per_try * i, ifname); 1994 break; 1995 } 1996 1997 } 1998 1999 mutex_unlock(&pktgen_thread_lock); 2000 } 2001 2002 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 2003 { 2004 struct pktgen_thread *t; 2005 2006 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 2007 struct pktgen_dev *pkt_dev; 2008 2009 rcu_read_lock(); 2010 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 2011 if (pkt_dev->odev != dev) 2012 continue; 2013 2014 proc_remove(pkt_dev->entry); 2015 2016 pkt_dev->entry = proc_create_data(dev->name, 0600, 2017 pn->proc_dir, 2018 &pktgen_if_fops, 2019 pkt_dev); 2020 if (!pkt_dev->entry) 2021 pr_err("can't move proc entry for '%s'\n", 2022 dev->name); 2023 break; 2024 } 2025 rcu_read_unlock(); 2026 } 2027 } 2028 2029 static int pktgen_device_event(struct notifier_block *unused, 2030 unsigned long event, void *ptr) 2031 { 2032 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2033 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 2034 2035 if (pn->pktgen_exiting) 2036 return NOTIFY_DONE; 2037 2038 /* It is OK that we do not hold the group lock right now, 2039 * as we run under the RTNL lock. 2040 */ 2041 2042 switch (event) { 2043 case NETDEV_CHANGENAME: 2044 pktgen_change_name(pn, dev); 2045 break; 2046 2047 case NETDEV_UNREGISTER: 2048 pktgen_mark_device(pn, dev->name); 2049 break; 2050 } 2051 2052 return NOTIFY_DONE; 2053 } 2054 2055 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 2056 struct pktgen_dev *pkt_dev, 2057 const char *ifname) 2058 { 2059 char b[IFNAMSIZ+5]; 2060 int i; 2061 2062 for (i = 0; ifname[i] != '@'; i++) { 2063 if (i == IFNAMSIZ) 2064 break; 2065 2066 b[i] = ifname[i]; 2067 } 2068 b[i] = 0; 2069 2070 return dev_get_by_name(pn->net, b); 2071 } 2072 2073 2074 /* Associate pktgen_dev with a device. */ 2075 2076 static int pktgen_setup_dev(const struct pktgen_net *pn, 2077 struct pktgen_dev *pkt_dev, const char *ifname) 2078 { 2079 struct net_device *odev; 2080 int err; 2081 2082 /* Clean old setups */ 2083 if (pkt_dev->odev) { 2084 dev_put(pkt_dev->odev); 2085 pkt_dev->odev = NULL; 2086 } 2087 2088 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 2089 if (!odev) { 2090 pr_err("no such netdevice: \"%s\"\n", ifname); 2091 return -ENODEV; 2092 } 2093 2094 if (odev->type != ARPHRD_ETHER) { 2095 pr_err("not an ethernet device: \"%s\"\n", ifname); 2096 err = -EINVAL; 2097 } else if (!netif_running(odev)) { 2098 pr_err("device is down: \"%s\"\n", ifname); 2099 err = -ENETDOWN; 2100 } else { 2101 pkt_dev->odev = odev; 2102 return 0; 2103 } 2104 2105 dev_put(odev); 2106 return err; 2107 } 2108 2109 /* Read pkt_dev from the interface and set up internal pktgen_dev 2110 * structure to have the right information to create/send packets 2111 */ 2112 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2113 { 2114 int ntxq; 2115 2116 if (!pkt_dev->odev) { 2117 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2118 sprintf(pkt_dev->result, 2119 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2120 return; 2121 } 2122 2123 /* make sure that we don't pick a non-existing transmit queue */ 2124 ntxq = pkt_dev->odev->real_num_tx_queues; 2125 2126 if (ntxq <= pkt_dev->queue_map_min) { 2127 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2128 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2129 pkt_dev->odevname); 2130 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2131 } 2132 if (pkt_dev->queue_map_max >= ntxq) { 2133 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2134 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2135 pkt_dev->odevname); 2136 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2137 } 2138 2139 /* Default to the interface's mac if not explicitly set. */ 2140 2141 if (is_zero_ether_addr(pkt_dev->src_mac)) 2142 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); 2143 2144 /* Set up Dest MAC */ 2145 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); 2146 2147 if (pkt_dev->flags & F_IPV6) { 2148 int i, set = 0, err = 1; 2149 struct inet6_dev *idev; 2150 2151 if (pkt_dev->min_pkt_size == 0) { 2152 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2153 + sizeof(struct udphdr) 2154 + sizeof(struct pktgen_hdr) 2155 + pkt_dev->pkt_overhead; 2156 } 2157 2158 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2159 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2160 set = 1; 2161 break; 2162 } 2163 2164 if (!set) { 2165 2166 /* 2167 * Use linklevel address if unconfigured. 2168 * 2169 * use ipv6_get_lladdr if/when it's get exported 2170 */ 2171 2172 rcu_read_lock(); 2173 idev = __in6_dev_get(pkt_dev->odev); 2174 if (idev) { 2175 struct inet6_ifaddr *ifp; 2176 2177 read_lock_bh(&idev->lock); 2178 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2179 if ((ifp->scope & IFA_LINK) && 2180 !(ifp->flags & IFA_F_TENTATIVE)) { 2181 pkt_dev->cur_in6_saddr = ifp->addr; 2182 err = 0; 2183 break; 2184 } 2185 } 2186 read_unlock_bh(&idev->lock); 2187 } 2188 rcu_read_unlock(); 2189 if (err) 2190 pr_err("ERROR: IPv6 link address not available\n"); 2191 } 2192 } else { 2193 if (pkt_dev->min_pkt_size == 0) { 2194 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2195 + sizeof(struct udphdr) 2196 + sizeof(struct pktgen_hdr) 2197 + pkt_dev->pkt_overhead; 2198 } 2199 2200 pkt_dev->saddr_min = 0; 2201 pkt_dev->saddr_max = 0; 2202 if (strlen(pkt_dev->src_min) == 0) { 2203 2204 struct in_device *in_dev; 2205 2206 rcu_read_lock(); 2207 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2208 if (in_dev) { 2209 if (in_dev->ifa_list) { 2210 pkt_dev->saddr_min = 2211 in_dev->ifa_list->ifa_address; 2212 pkt_dev->saddr_max = pkt_dev->saddr_min; 2213 } 2214 } 2215 rcu_read_unlock(); 2216 } else { 2217 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2218 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2219 } 2220 2221 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2222 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2223 } 2224 /* Initialize current values. */ 2225 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2226 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2227 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2228 2229 pkt_dev->cur_dst_mac_offset = 0; 2230 pkt_dev->cur_src_mac_offset = 0; 2231 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2232 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2233 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2234 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2235 pkt_dev->nflows = 0; 2236 } 2237 2238 2239 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2240 { 2241 ktime_t start_time, end_time; 2242 s64 remaining; 2243 struct hrtimer_sleeper t; 2244 2245 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2246 hrtimer_set_expires(&t.timer, spin_until); 2247 2248 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2249 if (remaining <= 0) { 2250 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2251 return; 2252 } 2253 2254 start_time = ktime_get(); 2255 if (remaining < 100000) { 2256 /* for small delays (<100us), just loop until limit is reached */ 2257 do { 2258 end_time = ktime_get(); 2259 } while (ktime_compare(end_time, spin_until) < 0); 2260 } else { 2261 /* see do_nanosleep */ 2262 hrtimer_init_sleeper(&t, current); 2263 do { 2264 set_current_state(TASK_INTERRUPTIBLE); 2265 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2266 2267 if (likely(t.task)) 2268 schedule(); 2269 2270 hrtimer_cancel(&t.timer); 2271 } while (t.task && pkt_dev->running && !signal_pending(current)); 2272 __set_current_state(TASK_RUNNING); 2273 end_time = ktime_get(); 2274 } 2275 2276 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2277 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2278 } 2279 2280 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2281 { 2282 pkt_dev->pkt_overhead = 0; 2283 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2284 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2285 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2286 } 2287 2288 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2289 { 2290 return !!(pkt_dev->flows[flow].flags & F_INIT); 2291 } 2292 2293 static inline int f_pick(struct pktgen_dev *pkt_dev) 2294 { 2295 int flow = pkt_dev->curfl; 2296 2297 if (pkt_dev->flags & F_FLOW_SEQ) { 2298 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2299 /* reset time */ 2300 pkt_dev->flows[flow].count = 0; 2301 pkt_dev->flows[flow].flags = 0; 2302 pkt_dev->curfl += 1; 2303 if (pkt_dev->curfl >= pkt_dev->cflows) 2304 pkt_dev->curfl = 0; /*reset */ 2305 } 2306 } else { 2307 flow = prandom_u32() % pkt_dev->cflows; 2308 pkt_dev->curfl = flow; 2309 2310 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2311 pkt_dev->flows[flow].count = 0; 2312 pkt_dev->flows[flow].flags = 0; 2313 } 2314 } 2315 2316 return pkt_dev->curfl; 2317 } 2318 2319 2320 #ifdef CONFIG_XFRM 2321 /* If there was already an IPSEC SA, we keep it as is, else 2322 * we go look for it ... 2323 */ 2324 #define DUMMY_MARK 0 2325 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2326 { 2327 struct xfrm_state *x = pkt_dev->flows[flow].x; 2328 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2329 if (!x) { 2330 2331 if (pkt_dev->spi) { 2332 /* We need as quick as possible to find the right SA 2333 * Searching with minimum criteria to archieve this. 2334 */ 2335 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); 2336 } else { 2337 /* slow path: we dont already have xfrm_state */ 2338 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2339 (xfrm_address_t *)&pkt_dev->cur_daddr, 2340 (xfrm_address_t *)&pkt_dev->cur_saddr, 2341 AF_INET, 2342 pkt_dev->ipsmode, 2343 pkt_dev->ipsproto, 0); 2344 } 2345 if (x) { 2346 pkt_dev->flows[flow].x = x; 2347 set_pkt_overhead(pkt_dev); 2348 pkt_dev->pkt_overhead += x->props.header_len; 2349 } 2350 2351 } 2352 } 2353 #endif 2354 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2355 { 2356 2357 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2358 pkt_dev->cur_queue_map = smp_processor_id(); 2359 2360 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2361 __u16 t; 2362 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2363 t = prandom_u32() % 2364 (pkt_dev->queue_map_max - 2365 pkt_dev->queue_map_min + 1) 2366 + pkt_dev->queue_map_min; 2367 } else { 2368 t = pkt_dev->cur_queue_map + 1; 2369 if (t > pkt_dev->queue_map_max) 2370 t = pkt_dev->queue_map_min; 2371 } 2372 pkt_dev->cur_queue_map = t; 2373 } 2374 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2375 } 2376 2377 /* Increment/randomize headers according to flags and current values 2378 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2379 */ 2380 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2381 { 2382 __u32 imn; 2383 __u32 imx; 2384 int flow = 0; 2385 2386 if (pkt_dev->cflows) 2387 flow = f_pick(pkt_dev); 2388 2389 /* Deal with source MAC */ 2390 if (pkt_dev->src_mac_count > 1) { 2391 __u32 mc; 2392 __u32 tmp; 2393 2394 if (pkt_dev->flags & F_MACSRC_RND) 2395 mc = prandom_u32() % pkt_dev->src_mac_count; 2396 else { 2397 mc = pkt_dev->cur_src_mac_offset++; 2398 if (pkt_dev->cur_src_mac_offset >= 2399 pkt_dev->src_mac_count) 2400 pkt_dev->cur_src_mac_offset = 0; 2401 } 2402 2403 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2404 pkt_dev->hh[11] = tmp; 2405 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2406 pkt_dev->hh[10] = tmp; 2407 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2408 pkt_dev->hh[9] = tmp; 2409 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2410 pkt_dev->hh[8] = tmp; 2411 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2412 pkt_dev->hh[7] = tmp; 2413 } 2414 2415 /* Deal with Destination MAC */ 2416 if (pkt_dev->dst_mac_count > 1) { 2417 __u32 mc; 2418 __u32 tmp; 2419 2420 if (pkt_dev->flags & F_MACDST_RND) 2421 mc = prandom_u32() % pkt_dev->dst_mac_count; 2422 2423 else { 2424 mc = pkt_dev->cur_dst_mac_offset++; 2425 if (pkt_dev->cur_dst_mac_offset >= 2426 pkt_dev->dst_mac_count) { 2427 pkt_dev->cur_dst_mac_offset = 0; 2428 } 2429 } 2430 2431 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2432 pkt_dev->hh[5] = tmp; 2433 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2434 pkt_dev->hh[4] = tmp; 2435 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2436 pkt_dev->hh[3] = tmp; 2437 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2438 pkt_dev->hh[2] = tmp; 2439 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2440 pkt_dev->hh[1] = tmp; 2441 } 2442 2443 if (pkt_dev->flags & F_MPLS_RND) { 2444 unsigned int i; 2445 for (i = 0; i < pkt_dev->nr_labels; i++) 2446 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2447 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2448 ((__force __be32)prandom_u32() & 2449 htonl(0x000fffff)); 2450 } 2451 2452 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2453 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2454 } 2455 2456 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2457 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2458 } 2459 2460 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2461 if (pkt_dev->flags & F_UDPSRC_RND) 2462 pkt_dev->cur_udp_src = prandom_u32() % 2463 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2464 + pkt_dev->udp_src_min; 2465 2466 else { 2467 pkt_dev->cur_udp_src++; 2468 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2469 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2470 } 2471 } 2472 2473 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2474 if (pkt_dev->flags & F_UDPDST_RND) { 2475 pkt_dev->cur_udp_dst = prandom_u32() % 2476 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2477 + pkt_dev->udp_dst_min; 2478 } else { 2479 pkt_dev->cur_udp_dst++; 2480 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2481 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2482 } 2483 } 2484 2485 if (!(pkt_dev->flags & F_IPV6)) { 2486 2487 imn = ntohl(pkt_dev->saddr_min); 2488 imx = ntohl(pkt_dev->saddr_max); 2489 if (imn < imx) { 2490 __u32 t; 2491 if (pkt_dev->flags & F_IPSRC_RND) 2492 t = prandom_u32() % (imx - imn) + imn; 2493 else { 2494 t = ntohl(pkt_dev->cur_saddr); 2495 t++; 2496 if (t > imx) 2497 t = imn; 2498 2499 } 2500 pkt_dev->cur_saddr = htonl(t); 2501 } 2502 2503 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2504 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2505 } else { 2506 imn = ntohl(pkt_dev->daddr_min); 2507 imx = ntohl(pkt_dev->daddr_max); 2508 if (imn < imx) { 2509 __u32 t; 2510 __be32 s; 2511 if (pkt_dev->flags & F_IPDST_RND) { 2512 2513 do { 2514 t = prandom_u32() % 2515 (imx - imn) + imn; 2516 s = htonl(t); 2517 } while (ipv4_is_loopback(s) || 2518 ipv4_is_multicast(s) || 2519 ipv4_is_lbcast(s) || 2520 ipv4_is_zeronet(s) || 2521 ipv4_is_local_multicast(s)); 2522 pkt_dev->cur_daddr = s; 2523 } else { 2524 t = ntohl(pkt_dev->cur_daddr); 2525 t++; 2526 if (t > imx) { 2527 t = imn; 2528 } 2529 pkt_dev->cur_daddr = htonl(t); 2530 } 2531 } 2532 if (pkt_dev->cflows) { 2533 pkt_dev->flows[flow].flags |= F_INIT; 2534 pkt_dev->flows[flow].cur_daddr = 2535 pkt_dev->cur_daddr; 2536 #ifdef CONFIG_XFRM 2537 if (pkt_dev->flags & F_IPSEC_ON) 2538 get_ipsec_sa(pkt_dev, flow); 2539 #endif 2540 pkt_dev->nflows++; 2541 } 2542 } 2543 } else { /* IPV6 * */ 2544 2545 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2546 int i; 2547 2548 /* Only random destinations yet */ 2549 2550 for (i = 0; i < 4; i++) { 2551 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2552 (((__force __be32)prandom_u32() | 2553 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2554 pkt_dev->max_in6_daddr.s6_addr32[i]); 2555 } 2556 } 2557 } 2558 2559 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2560 __u32 t; 2561 if (pkt_dev->flags & F_TXSIZE_RND) { 2562 t = prandom_u32() % 2563 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2564 + pkt_dev->min_pkt_size; 2565 } else { 2566 t = pkt_dev->cur_pkt_size + 1; 2567 if (t > pkt_dev->max_pkt_size) 2568 t = pkt_dev->min_pkt_size; 2569 } 2570 pkt_dev->cur_pkt_size = t; 2571 } 2572 2573 set_cur_queue_map(pkt_dev); 2574 2575 pkt_dev->flows[flow].count++; 2576 } 2577 2578 2579 #ifdef CONFIG_XFRM 2580 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { 2581 2582 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ 2583 }; 2584 2585 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2586 { 2587 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2588 int err = 0; 2589 struct net *net = dev_net(pkt_dev->odev); 2590 2591 if (!x) 2592 return 0; 2593 /* XXX: we dont support tunnel mode for now until 2594 * we resolve the dst issue */ 2595 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) 2596 return 0; 2597 2598 /* But when user specify an valid SPI, transformation 2599 * supports both transport/tunnel mode + ESP/AH type. 2600 */ 2601 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) 2602 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; 2603 2604 rcu_read_lock_bh(); 2605 err = x->outer_mode->output(x, skb); 2606 rcu_read_unlock_bh(); 2607 if (err) { 2608 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); 2609 goto error; 2610 } 2611 err = x->type->output(x, skb); 2612 if (err) { 2613 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); 2614 goto error; 2615 } 2616 spin_lock_bh(&x->lock); 2617 x->curlft.bytes += skb->len; 2618 x->curlft.packets++; 2619 spin_unlock_bh(&x->lock); 2620 error: 2621 return err; 2622 } 2623 2624 static void free_SAs(struct pktgen_dev *pkt_dev) 2625 { 2626 if (pkt_dev->cflows) { 2627 /* let go of the SAs if we have them */ 2628 int i; 2629 for (i = 0; i < pkt_dev->cflows; i++) { 2630 struct xfrm_state *x = pkt_dev->flows[i].x; 2631 if (x) { 2632 xfrm_state_put(x); 2633 pkt_dev->flows[i].x = NULL; 2634 } 2635 } 2636 } 2637 } 2638 2639 static int process_ipsec(struct pktgen_dev *pkt_dev, 2640 struct sk_buff *skb, __be16 protocol) 2641 { 2642 if (pkt_dev->flags & F_IPSEC_ON) { 2643 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2644 int nhead = 0; 2645 if (x) { 2646 struct ethhdr *eth; 2647 struct iphdr *iph; 2648 int ret; 2649 2650 nhead = x->props.header_len - skb_headroom(skb); 2651 if (nhead > 0) { 2652 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2653 if (ret < 0) { 2654 pr_err("Error expanding ipsec packet %d\n", 2655 ret); 2656 goto err; 2657 } 2658 } 2659 2660 /* ipsec is not expecting ll header */ 2661 skb_pull(skb, ETH_HLEN); 2662 ret = pktgen_output_ipsec(skb, pkt_dev); 2663 if (ret) { 2664 pr_err("Error creating ipsec packet %d\n", ret); 2665 goto err; 2666 } 2667 /* restore ll */ 2668 eth = (struct ethhdr *)skb_push(skb, ETH_HLEN); 2669 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN); 2670 eth->h_proto = protocol; 2671 2672 /* Update IPv4 header len as well as checksum value */ 2673 iph = ip_hdr(skb); 2674 iph->tot_len = htons(skb->len - ETH_HLEN); 2675 ip_send_check(iph); 2676 } 2677 } 2678 return 1; 2679 err: 2680 kfree_skb(skb); 2681 return 0; 2682 } 2683 #endif 2684 2685 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2686 { 2687 unsigned int i; 2688 for (i = 0; i < pkt_dev->nr_labels; i++) 2689 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2690 2691 mpls--; 2692 *mpls |= MPLS_STACK_BOTTOM; 2693 } 2694 2695 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2696 unsigned int prio) 2697 { 2698 return htons(id | (cfi << 12) | (prio << 13)); 2699 } 2700 2701 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2702 int datalen) 2703 { 2704 struct timeval timestamp; 2705 struct pktgen_hdr *pgh; 2706 2707 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2708 datalen -= sizeof(*pgh); 2709 2710 if (pkt_dev->nfrags <= 0) { 2711 memset(skb_put(skb, datalen), 0, datalen); 2712 } else { 2713 int frags = pkt_dev->nfrags; 2714 int i, len; 2715 int frag_len; 2716 2717 2718 if (frags > MAX_SKB_FRAGS) 2719 frags = MAX_SKB_FRAGS; 2720 len = datalen - frags * PAGE_SIZE; 2721 if (len > 0) { 2722 memset(skb_put(skb, len), 0, len); 2723 datalen = frags * PAGE_SIZE; 2724 } 2725 2726 i = 0; 2727 frag_len = (datalen/frags) < PAGE_SIZE ? 2728 (datalen/frags) : PAGE_SIZE; 2729 while (datalen > 0) { 2730 if (unlikely(!pkt_dev->page)) { 2731 int node = numa_node_id(); 2732 2733 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2734 node = pkt_dev->node; 2735 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2736 if (!pkt_dev->page) 2737 break; 2738 } 2739 get_page(pkt_dev->page); 2740 skb_frag_set_page(skb, i, pkt_dev->page); 2741 skb_shinfo(skb)->frags[i].page_offset = 0; 2742 /*last fragment, fill rest of data*/ 2743 if (i == (frags - 1)) 2744 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2745 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2746 else 2747 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2748 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2749 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2750 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2751 i++; 2752 skb_shinfo(skb)->nr_frags = i; 2753 } 2754 } 2755 2756 /* Stamp the time, and sequence number, 2757 * convert them to network byte order 2758 */ 2759 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2760 pgh->seq_num = htonl(pkt_dev->seq_num); 2761 2762 if (pkt_dev->flags & F_NO_TIMESTAMP) { 2763 pgh->tv_sec = 0; 2764 pgh->tv_usec = 0; 2765 } else { 2766 do_gettimeofday(×tamp); 2767 pgh->tv_sec = htonl(timestamp.tv_sec); 2768 pgh->tv_usec = htonl(timestamp.tv_usec); 2769 } 2770 } 2771 2772 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2773 struct pktgen_dev *pkt_dev, 2774 unsigned int extralen) 2775 { 2776 struct sk_buff *skb = NULL; 2777 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2778 pkt_dev->pkt_overhead; 2779 2780 if (pkt_dev->flags & F_NODE) { 2781 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2782 2783 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2784 if (likely(skb)) { 2785 skb_reserve(skb, NET_SKB_PAD); 2786 skb->dev = dev; 2787 } 2788 } else { 2789 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2790 } 2791 2792 return skb; 2793 } 2794 2795 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2796 struct pktgen_dev *pkt_dev) 2797 { 2798 struct sk_buff *skb = NULL; 2799 __u8 *eth; 2800 struct udphdr *udph; 2801 int datalen, iplen; 2802 struct iphdr *iph; 2803 __be16 protocol = htons(ETH_P_IP); 2804 __be32 *mpls; 2805 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2806 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2807 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2808 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2809 u16 queue_map; 2810 2811 if (pkt_dev->nr_labels) 2812 protocol = htons(ETH_P_MPLS_UC); 2813 2814 if (pkt_dev->vlan_id != 0xffff) 2815 protocol = htons(ETH_P_8021Q); 2816 2817 /* Update any of the values, used when we're incrementing various 2818 * fields. 2819 */ 2820 mod_cur_headers(pkt_dev); 2821 queue_map = pkt_dev->cur_queue_map; 2822 2823 datalen = (odev->hard_header_len + 16) & ~0xf; 2824 2825 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2826 if (!skb) { 2827 sprintf(pkt_dev->result, "No memory"); 2828 return NULL; 2829 } 2830 2831 prefetchw(skb->data); 2832 skb_reserve(skb, datalen); 2833 2834 /* Reserve for ethernet and IP header */ 2835 eth = (__u8 *) skb_push(skb, 14); 2836 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2837 if (pkt_dev->nr_labels) 2838 mpls_push(mpls, pkt_dev); 2839 2840 if (pkt_dev->vlan_id != 0xffff) { 2841 if (pkt_dev->svlan_id != 0xffff) { 2842 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2843 *svlan_tci = build_tci(pkt_dev->svlan_id, 2844 pkt_dev->svlan_cfi, 2845 pkt_dev->svlan_p); 2846 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2847 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2848 } 2849 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2850 *vlan_tci = build_tci(pkt_dev->vlan_id, 2851 pkt_dev->vlan_cfi, 2852 pkt_dev->vlan_p); 2853 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2854 *vlan_encapsulated_proto = htons(ETH_P_IP); 2855 } 2856 2857 skb_set_mac_header(skb, 0); 2858 skb_set_network_header(skb, skb->len); 2859 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2860 2861 skb_set_transport_header(skb, skb->len); 2862 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2863 skb_set_queue_mapping(skb, queue_map); 2864 skb->priority = pkt_dev->skb_priority; 2865 2866 memcpy(eth, pkt_dev->hh, 12); 2867 *(__be16 *) & eth[12] = protocol; 2868 2869 /* Eth + IPh + UDPh + mpls */ 2870 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2871 pkt_dev->pkt_overhead; 2872 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2873 datalen = sizeof(struct pktgen_hdr); 2874 2875 udph->source = htons(pkt_dev->cur_udp_src); 2876 udph->dest = htons(pkt_dev->cur_udp_dst); 2877 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2878 udph->check = 0; 2879 2880 iph->ihl = 5; 2881 iph->version = 4; 2882 iph->ttl = 32; 2883 iph->tos = pkt_dev->tos; 2884 iph->protocol = IPPROTO_UDP; /* UDP */ 2885 iph->saddr = pkt_dev->cur_saddr; 2886 iph->daddr = pkt_dev->cur_daddr; 2887 iph->id = htons(pkt_dev->ip_id); 2888 pkt_dev->ip_id++; 2889 iph->frag_off = 0; 2890 iplen = 20 + 8 + datalen; 2891 iph->tot_len = htons(iplen); 2892 ip_send_check(iph); 2893 skb->protocol = protocol; 2894 skb->dev = odev; 2895 skb->pkt_type = PACKET_HOST; 2896 2897 pktgen_finalize_skb(pkt_dev, skb, datalen); 2898 2899 if (!(pkt_dev->flags & F_UDPCSUM)) { 2900 skb->ip_summed = CHECKSUM_NONE; 2901 } else if (odev->features & NETIF_F_V4_CSUM) { 2902 skb->ip_summed = CHECKSUM_PARTIAL; 2903 skb->csum = 0; 2904 udp4_hwcsum(skb, iph->saddr, iph->daddr); 2905 } else { 2906 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); 2907 2908 /* add protocol-dependent pseudo-header */ 2909 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, 2910 datalen + 8, IPPROTO_UDP, csum); 2911 2912 if (udph->check == 0) 2913 udph->check = CSUM_MANGLED_0; 2914 } 2915 2916 #ifdef CONFIG_XFRM 2917 if (!process_ipsec(pkt_dev, skb, protocol)) 2918 return NULL; 2919 #endif 2920 2921 return skb; 2922 } 2923 2924 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2925 struct pktgen_dev *pkt_dev) 2926 { 2927 struct sk_buff *skb = NULL; 2928 __u8 *eth; 2929 struct udphdr *udph; 2930 int datalen, udplen; 2931 struct ipv6hdr *iph; 2932 __be16 protocol = htons(ETH_P_IPV6); 2933 __be32 *mpls; 2934 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2935 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2936 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2937 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2938 u16 queue_map; 2939 2940 if (pkt_dev->nr_labels) 2941 protocol = htons(ETH_P_MPLS_UC); 2942 2943 if (pkt_dev->vlan_id != 0xffff) 2944 protocol = htons(ETH_P_8021Q); 2945 2946 /* Update any of the values, used when we're incrementing various 2947 * fields. 2948 */ 2949 mod_cur_headers(pkt_dev); 2950 queue_map = pkt_dev->cur_queue_map; 2951 2952 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2953 if (!skb) { 2954 sprintf(pkt_dev->result, "No memory"); 2955 return NULL; 2956 } 2957 2958 prefetchw(skb->data); 2959 skb_reserve(skb, 16); 2960 2961 /* Reserve for ethernet and IP header */ 2962 eth = (__u8 *) skb_push(skb, 14); 2963 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2964 if (pkt_dev->nr_labels) 2965 mpls_push(mpls, pkt_dev); 2966 2967 if (pkt_dev->vlan_id != 0xffff) { 2968 if (pkt_dev->svlan_id != 0xffff) { 2969 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2970 *svlan_tci = build_tci(pkt_dev->svlan_id, 2971 pkt_dev->svlan_cfi, 2972 pkt_dev->svlan_p); 2973 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2974 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2975 } 2976 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2977 *vlan_tci = build_tci(pkt_dev->vlan_id, 2978 pkt_dev->vlan_cfi, 2979 pkt_dev->vlan_p); 2980 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2981 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2982 } 2983 2984 skb_set_mac_header(skb, 0); 2985 skb_set_network_header(skb, skb->len); 2986 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2987 2988 skb_set_transport_header(skb, skb->len); 2989 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2990 skb_set_queue_mapping(skb, queue_map); 2991 skb->priority = pkt_dev->skb_priority; 2992 2993 memcpy(eth, pkt_dev->hh, 12); 2994 *(__be16 *) ð[12] = protocol; 2995 2996 /* Eth + IPh + UDPh + mpls */ 2997 datalen = pkt_dev->cur_pkt_size - 14 - 2998 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2999 pkt_dev->pkt_overhead; 3000 3001 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 3002 datalen = sizeof(struct pktgen_hdr); 3003 net_info_ratelimited("increased datalen to %d\n", datalen); 3004 } 3005 3006 udplen = datalen + sizeof(struct udphdr); 3007 udph->source = htons(pkt_dev->cur_udp_src); 3008 udph->dest = htons(pkt_dev->cur_udp_dst); 3009 udph->len = htons(udplen); 3010 udph->check = 0; 3011 3012 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3013 3014 if (pkt_dev->traffic_class) { 3015 /* Version + traffic class + flow (0) */ 3016 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3017 } 3018 3019 iph->hop_limit = 32; 3020 3021 iph->payload_len = htons(udplen); 3022 iph->nexthdr = IPPROTO_UDP; 3023 3024 iph->daddr = pkt_dev->cur_in6_daddr; 3025 iph->saddr = pkt_dev->cur_in6_saddr; 3026 3027 skb->protocol = protocol; 3028 skb->dev = odev; 3029 skb->pkt_type = PACKET_HOST; 3030 3031 pktgen_finalize_skb(pkt_dev, skb, datalen); 3032 3033 if (!(pkt_dev->flags & F_UDPCSUM)) { 3034 skb->ip_summed = CHECKSUM_NONE; 3035 } else if (odev->features & NETIF_F_V6_CSUM) { 3036 skb->ip_summed = CHECKSUM_PARTIAL; 3037 skb->csum_start = skb_transport_header(skb) - skb->head; 3038 skb->csum_offset = offsetof(struct udphdr, check); 3039 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 3040 } else { 3041 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); 3042 3043 /* add protocol-dependent pseudo-header */ 3044 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 3045 3046 if (udph->check == 0) 3047 udph->check = CSUM_MANGLED_0; 3048 } 3049 3050 return skb; 3051 } 3052 3053 static struct sk_buff *fill_packet(struct net_device *odev, 3054 struct pktgen_dev *pkt_dev) 3055 { 3056 if (pkt_dev->flags & F_IPV6) 3057 return fill_packet_ipv6(odev, pkt_dev); 3058 else 3059 return fill_packet_ipv4(odev, pkt_dev); 3060 } 3061 3062 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3063 { 3064 pkt_dev->seq_num = 1; 3065 pkt_dev->idle_acc = 0; 3066 pkt_dev->sofar = 0; 3067 pkt_dev->tx_bytes = 0; 3068 pkt_dev->errors = 0; 3069 } 3070 3071 /* Set up structure for sending pkts, clear counters */ 3072 3073 static void pktgen_run(struct pktgen_thread *t) 3074 { 3075 struct pktgen_dev *pkt_dev; 3076 int started = 0; 3077 3078 func_enter(); 3079 3080 rcu_read_lock(); 3081 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3082 3083 /* 3084 * setup odev and create initial packet. 3085 */ 3086 pktgen_setup_inject(pkt_dev); 3087 3088 if (pkt_dev->odev) { 3089 pktgen_clear_counters(pkt_dev); 3090 pkt_dev->skb = NULL; 3091 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3092 3093 set_pkt_overhead(pkt_dev); 3094 3095 strcpy(pkt_dev->result, "Starting"); 3096 pkt_dev->running = 1; /* Cranke yeself! */ 3097 started++; 3098 } else 3099 strcpy(pkt_dev->result, "Error starting"); 3100 } 3101 rcu_read_unlock(); 3102 if (started) 3103 t->control &= ~(T_STOP); 3104 } 3105 3106 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 3107 { 3108 struct pktgen_thread *t; 3109 3110 func_enter(); 3111 3112 mutex_lock(&pktgen_thread_lock); 3113 3114 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3115 t->control |= T_STOP; 3116 3117 mutex_unlock(&pktgen_thread_lock); 3118 } 3119 3120 static int thread_is_running(const struct pktgen_thread *t) 3121 { 3122 const struct pktgen_dev *pkt_dev; 3123 3124 rcu_read_lock(); 3125 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 3126 if (pkt_dev->running) { 3127 rcu_read_unlock(); 3128 return 1; 3129 } 3130 rcu_read_unlock(); 3131 return 0; 3132 } 3133 3134 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3135 { 3136 while (thread_is_running(t)) { 3137 3138 msleep_interruptible(100); 3139 3140 if (signal_pending(current)) 3141 goto signal; 3142 } 3143 return 1; 3144 signal: 3145 return 0; 3146 } 3147 3148 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3149 { 3150 struct pktgen_thread *t; 3151 int sig = 1; 3152 3153 mutex_lock(&pktgen_thread_lock); 3154 3155 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3156 sig = pktgen_wait_thread_run(t); 3157 if (sig == 0) 3158 break; 3159 } 3160 3161 if (sig == 0) 3162 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3163 t->control |= (T_STOP); 3164 3165 mutex_unlock(&pktgen_thread_lock); 3166 return sig; 3167 } 3168 3169 static void pktgen_run_all_threads(struct pktgen_net *pn) 3170 { 3171 struct pktgen_thread *t; 3172 3173 func_enter(); 3174 3175 mutex_lock(&pktgen_thread_lock); 3176 3177 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3178 t->control |= (T_RUN); 3179 3180 mutex_unlock(&pktgen_thread_lock); 3181 3182 /* Propagate thread->control */ 3183 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3184 3185 pktgen_wait_all_threads_run(pn); 3186 } 3187 3188 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3189 { 3190 struct pktgen_thread *t; 3191 3192 func_enter(); 3193 3194 mutex_lock(&pktgen_thread_lock); 3195 3196 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3197 t->control |= (T_REMDEVALL); 3198 3199 mutex_unlock(&pktgen_thread_lock); 3200 3201 /* Propagate thread->control */ 3202 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3203 3204 pktgen_wait_all_threads_run(pn); 3205 } 3206 3207 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3208 { 3209 __u64 bps, mbps, pps; 3210 char *p = pkt_dev->result; 3211 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3212 pkt_dev->started_at); 3213 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3214 3215 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3216 (unsigned long long)ktime_to_us(elapsed), 3217 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3218 (unsigned long long)ktime_to_us(idle), 3219 (unsigned long long)pkt_dev->sofar, 3220 pkt_dev->cur_pkt_size, nr_frags); 3221 3222 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3223 ktime_to_ns(elapsed)); 3224 3225 bps = pps * 8 * pkt_dev->cur_pkt_size; 3226 3227 mbps = bps; 3228 do_div(mbps, 1000000); 3229 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3230 (unsigned long long)pps, 3231 (unsigned long long)mbps, 3232 (unsigned long long)bps, 3233 (unsigned long long)pkt_dev->errors); 3234 } 3235 3236 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3237 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3238 { 3239 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3240 3241 if (!pkt_dev->running) { 3242 pr_warn("interface: %s is already stopped\n", 3243 pkt_dev->odevname); 3244 return -EINVAL; 3245 } 3246 3247 pkt_dev->running = 0; 3248 kfree_skb(pkt_dev->skb); 3249 pkt_dev->skb = NULL; 3250 pkt_dev->stopped_at = ktime_get(); 3251 3252 show_results(pkt_dev, nr_frags); 3253 3254 return 0; 3255 } 3256 3257 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3258 { 3259 struct pktgen_dev *pkt_dev, *best = NULL; 3260 3261 rcu_read_lock(); 3262 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3263 if (!pkt_dev->running) 3264 continue; 3265 if (best == NULL) 3266 best = pkt_dev; 3267 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3268 best = pkt_dev; 3269 } 3270 rcu_read_unlock(); 3271 3272 return best; 3273 } 3274 3275 static void pktgen_stop(struct pktgen_thread *t) 3276 { 3277 struct pktgen_dev *pkt_dev; 3278 3279 func_enter(); 3280 3281 rcu_read_lock(); 3282 3283 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3284 pktgen_stop_device(pkt_dev); 3285 } 3286 3287 rcu_read_unlock(); 3288 } 3289 3290 /* 3291 * one of our devices needs to be removed - find it 3292 * and remove it 3293 */ 3294 static void pktgen_rem_one_if(struct pktgen_thread *t) 3295 { 3296 struct list_head *q, *n; 3297 struct pktgen_dev *cur; 3298 3299 func_enter(); 3300 3301 list_for_each_safe(q, n, &t->if_list) { 3302 cur = list_entry(q, struct pktgen_dev, list); 3303 3304 if (!cur->removal_mark) 3305 continue; 3306 3307 kfree_skb(cur->skb); 3308 cur->skb = NULL; 3309 3310 pktgen_remove_device(t, cur); 3311 3312 break; 3313 } 3314 } 3315 3316 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3317 { 3318 struct list_head *q, *n; 3319 struct pktgen_dev *cur; 3320 3321 func_enter(); 3322 3323 /* Remove all devices, free mem */ 3324 3325 list_for_each_safe(q, n, &t->if_list) { 3326 cur = list_entry(q, struct pktgen_dev, list); 3327 3328 kfree_skb(cur->skb); 3329 cur->skb = NULL; 3330 3331 pktgen_remove_device(t, cur); 3332 } 3333 } 3334 3335 static void pktgen_rem_thread(struct pktgen_thread *t) 3336 { 3337 /* Remove from the thread list */ 3338 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3339 } 3340 3341 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3342 { 3343 ktime_t idle_start = ktime_get(); 3344 schedule(); 3345 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3346 } 3347 3348 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3349 { 3350 ktime_t idle_start = ktime_get(); 3351 3352 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3353 if (signal_pending(current)) 3354 break; 3355 3356 if (need_resched()) 3357 pktgen_resched(pkt_dev); 3358 else 3359 cpu_relax(); 3360 } 3361 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3362 } 3363 3364 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3365 { 3366 unsigned int burst = ACCESS_ONCE(pkt_dev->burst); 3367 struct net_device *odev = pkt_dev->odev; 3368 struct netdev_queue *txq; 3369 struct sk_buff *skb; 3370 int ret; 3371 3372 /* If device is offline, then don't send */ 3373 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3374 pktgen_stop_device(pkt_dev); 3375 return; 3376 } 3377 3378 /* This is max DELAY, this has special meaning of 3379 * "never transmit" 3380 */ 3381 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3382 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3383 return; 3384 } 3385 3386 /* If no skb or clone count exhausted then get new one */ 3387 if (!pkt_dev->skb || (pkt_dev->last_ok && 3388 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3389 /* build a new pkt */ 3390 kfree_skb(pkt_dev->skb); 3391 3392 pkt_dev->skb = fill_packet(odev, pkt_dev); 3393 if (pkt_dev->skb == NULL) { 3394 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3395 schedule(); 3396 pkt_dev->clone_count--; /* back out increment, OOM */ 3397 return; 3398 } 3399 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3400 pkt_dev->allocated_skbs++; 3401 pkt_dev->clone_count = 0; /* reset counter */ 3402 } 3403 3404 if (pkt_dev->delay && pkt_dev->last_ok) 3405 spin(pkt_dev, pkt_dev->next_tx); 3406 3407 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) { 3408 skb = pkt_dev->skb; 3409 skb->protocol = eth_type_trans(skb, skb->dev); 3410 atomic_add(burst, &skb->users); 3411 local_bh_disable(); 3412 do { 3413 ret = netif_receive_skb(skb); 3414 if (ret == NET_RX_DROP) 3415 pkt_dev->errors++; 3416 pkt_dev->sofar++; 3417 pkt_dev->seq_num++; 3418 if (atomic_read(&skb->users) != burst) { 3419 /* skb was queued by rps/rfs or taps, 3420 * so cannot reuse this skb 3421 */ 3422 atomic_sub(burst - 1, &skb->users); 3423 /* get out of the loop and wait 3424 * until skb is consumed 3425 */ 3426 break; 3427 } 3428 /* skb was 'freed' by stack, so clean few 3429 * bits and reuse it 3430 */ 3431 #ifdef CONFIG_NET_CLS_ACT 3432 skb->tc_verd = 0; /* reset reclass/redir ttl */ 3433 #endif 3434 } while (--burst > 0); 3435 goto out; /* Skips xmit_mode M_START_XMIT */ 3436 } 3437 3438 txq = skb_get_tx_queue(odev, pkt_dev->skb); 3439 3440 local_bh_disable(); 3441 3442 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3443 3444 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3445 ret = NETDEV_TX_BUSY; 3446 pkt_dev->last_ok = 0; 3447 goto unlock; 3448 } 3449 atomic_add(burst, &pkt_dev->skb->users); 3450 3451 xmit_more: 3452 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); 3453 3454 switch (ret) { 3455 case NETDEV_TX_OK: 3456 pkt_dev->last_ok = 1; 3457 pkt_dev->sofar++; 3458 pkt_dev->seq_num++; 3459 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3460 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) 3461 goto xmit_more; 3462 break; 3463 case NET_XMIT_DROP: 3464 case NET_XMIT_CN: 3465 case NET_XMIT_POLICED: 3466 /* skb has been consumed */ 3467 pkt_dev->errors++; 3468 break; 3469 default: /* Drivers are not supposed to return other values! */ 3470 net_info_ratelimited("%s xmit error: %d\n", 3471 pkt_dev->odevname, ret); 3472 pkt_dev->errors++; 3473 /* fallthru */ 3474 case NETDEV_TX_LOCKED: 3475 case NETDEV_TX_BUSY: 3476 /* Retry it next time */ 3477 atomic_dec(&(pkt_dev->skb->users)); 3478 pkt_dev->last_ok = 0; 3479 } 3480 if (unlikely(burst)) 3481 atomic_sub(burst, &pkt_dev->skb->users); 3482 unlock: 3483 HARD_TX_UNLOCK(odev, txq); 3484 3485 out: 3486 local_bh_enable(); 3487 3488 /* If pkt_dev->count is zero, then run forever */ 3489 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3490 pktgen_wait_for_skb(pkt_dev); 3491 3492 /* Done with this */ 3493 pktgen_stop_device(pkt_dev); 3494 } 3495 } 3496 3497 /* 3498 * Main loop of the thread goes here 3499 */ 3500 3501 static int pktgen_thread_worker(void *arg) 3502 { 3503 DEFINE_WAIT(wait); 3504 struct pktgen_thread *t = arg; 3505 struct pktgen_dev *pkt_dev = NULL; 3506 int cpu = t->cpu; 3507 3508 BUG_ON(smp_processor_id() != cpu); 3509 3510 init_waitqueue_head(&t->queue); 3511 complete(&t->start_done); 3512 3513 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3514 3515 set_freezable(); 3516 3517 __set_current_state(TASK_RUNNING); 3518 3519 while (!kthread_should_stop()) { 3520 pkt_dev = next_to_run(t); 3521 3522 if (unlikely(!pkt_dev && t->control == 0)) { 3523 if (t->net->pktgen_exiting) 3524 break; 3525 wait_event_interruptible_timeout(t->queue, 3526 t->control != 0, 3527 HZ/10); 3528 try_to_freeze(); 3529 continue; 3530 } 3531 3532 if (likely(pkt_dev)) { 3533 pktgen_xmit(pkt_dev); 3534 3535 if (need_resched()) 3536 pktgen_resched(pkt_dev); 3537 else 3538 cpu_relax(); 3539 } 3540 3541 if (t->control & T_STOP) { 3542 pktgen_stop(t); 3543 t->control &= ~(T_STOP); 3544 } 3545 3546 if (t->control & T_RUN) { 3547 pktgen_run(t); 3548 t->control &= ~(T_RUN); 3549 } 3550 3551 if (t->control & T_REMDEVALL) { 3552 pktgen_rem_all_ifs(t); 3553 t->control &= ~(T_REMDEVALL); 3554 } 3555 3556 if (t->control & T_REMDEV) { 3557 pktgen_rem_one_if(t); 3558 t->control &= ~(T_REMDEV); 3559 } 3560 3561 try_to_freeze(); 3562 } 3563 set_current_state(TASK_INTERRUPTIBLE); 3564 3565 pr_debug("%s stopping all device\n", t->tsk->comm); 3566 pktgen_stop(t); 3567 3568 pr_debug("%s removing all device\n", t->tsk->comm); 3569 pktgen_rem_all_ifs(t); 3570 3571 pr_debug("%s removing thread\n", t->tsk->comm); 3572 pktgen_rem_thread(t); 3573 3574 return 0; 3575 } 3576 3577 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3578 const char *ifname, bool exact) 3579 { 3580 struct pktgen_dev *p, *pkt_dev = NULL; 3581 size_t len = strlen(ifname); 3582 3583 rcu_read_lock(); 3584 list_for_each_entry_rcu(p, &t->if_list, list) 3585 if (strncmp(p->odevname, ifname, len) == 0) { 3586 if (p->odevname[len]) { 3587 if (exact || p->odevname[len] != '@') 3588 continue; 3589 } 3590 pkt_dev = p; 3591 break; 3592 } 3593 3594 rcu_read_unlock(); 3595 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3596 return pkt_dev; 3597 } 3598 3599 /* 3600 * Adds a dev at front of if_list. 3601 */ 3602 3603 static int add_dev_to_thread(struct pktgen_thread *t, 3604 struct pktgen_dev *pkt_dev) 3605 { 3606 int rv = 0; 3607 3608 /* This function cannot be called concurrently, as its called 3609 * under pktgen_thread_lock mutex, but it can run from 3610 * userspace on another CPU than the kthread. The if_lock() 3611 * is used here to sync with concurrent instances of 3612 * _rem_dev_from_if_list() invoked via kthread, which is also 3613 * updating the if_list */ 3614 if_lock(t); 3615 3616 if (pkt_dev->pg_thread) { 3617 pr_err("ERROR: already assigned to a thread\n"); 3618 rv = -EBUSY; 3619 goto out; 3620 } 3621 3622 pkt_dev->running = 0; 3623 pkt_dev->pg_thread = t; 3624 list_add_rcu(&pkt_dev->list, &t->if_list); 3625 3626 out: 3627 if_unlock(t); 3628 return rv; 3629 } 3630 3631 /* Called under thread lock */ 3632 3633 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3634 { 3635 struct pktgen_dev *pkt_dev; 3636 int err; 3637 int node = cpu_to_node(t->cpu); 3638 3639 /* We don't allow a device to be on several threads */ 3640 3641 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3642 if (pkt_dev) { 3643 pr_err("ERROR: interface already used\n"); 3644 return -EBUSY; 3645 } 3646 3647 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3648 if (!pkt_dev) 3649 return -ENOMEM; 3650 3651 strcpy(pkt_dev->odevname, ifname); 3652 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3653 node); 3654 if (pkt_dev->flows == NULL) { 3655 kfree(pkt_dev); 3656 return -ENOMEM; 3657 } 3658 3659 pkt_dev->removal_mark = 0; 3660 pkt_dev->nfrags = 0; 3661 pkt_dev->delay = pg_delay_d; 3662 pkt_dev->count = pg_count_d; 3663 pkt_dev->sofar = 0; 3664 pkt_dev->udp_src_min = 9; /* sink port */ 3665 pkt_dev->udp_src_max = 9; 3666 pkt_dev->udp_dst_min = 9; 3667 pkt_dev->udp_dst_max = 9; 3668 pkt_dev->vlan_p = 0; 3669 pkt_dev->vlan_cfi = 0; 3670 pkt_dev->vlan_id = 0xffff; 3671 pkt_dev->svlan_p = 0; 3672 pkt_dev->svlan_cfi = 0; 3673 pkt_dev->svlan_id = 0xffff; 3674 pkt_dev->burst = 1; 3675 pkt_dev->node = -1; 3676 3677 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3678 if (err) 3679 goto out1; 3680 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3681 pkt_dev->clone_skb = pg_clone_skb_d; 3682 3683 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3684 &pktgen_if_fops, pkt_dev); 3685 if (!pkt_dev->entry) { 3686 pr_err("cannot create %s/%s procfs entry\n", 3687 PG_PROC_DIR, ifname); 3688 err = -EINVAL; 3689 goto out2; 3690 } 3691 #ifdef CONFIG_XFRM 3692 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3693 pkt_dev->ipsproto = IPPROTO_ESP; 3694 3695 /* xfrm tunnel mode needs additional dst to extract outter 3696 * ip header protocol/ttl/id field, here creat a phony one. 3697 * instead of looking for a valid rt, which definitely hurting 3698 * performance under such circumstance. 3699 */ 3700 pkt_dev->dstops.family = AF_INET; 3701 pkt_dev->dst.dev = pkt_dev->odev; 3702 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); 3703 pkt_dev->dst.child = &pkt_dev->dst; 3704 pkt_dev->dst.ops = &pkt_dev->dstops; 3705 #endif 3706 3707 return add_dev_to_thread(t, pkt_dev); 3708 out2: 3709 dev_put(pkt_dev->odev); 3710 out1: 3711 #ifdef CONFIG_XFRM 3712 free_SAs(pkt_dev); 3713 #endif 3714 vfree(pkt_dev->flows); 3715 kfree(pkt_dev); 3716 return err; 3717 } 3718 3719 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3720 { 3721 struct pktgen_thread *t; 3722 struct proc_dir_entry *pe; 3723 struct task_struct *p; 3724 3725 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3726 cpu_to_node(cpu)); 3727 if (!t) { 3728 pr_err("ERROR: out of memory, can't create new thread\n"); 3729 return -ENOMEM; 3730 } 3731 3732 spin_lock_init(&t->if_lock); 3733 t->cpu = cpu; 3734 3735 INIT_LIST_HEAD(&t->if_list); 3736 3737 list_add_tail(&t->th_list, &pn->pktgen_threads); 3738 init_completion(&t->start_done); 3739 3740 p = kthread_create_on_node(pktgen_thread_worker, 3741 t, 3742 cpu_to_node(cpu), 3743 "kpktgend_%d", cpu); 3744 if (IS_ERR(p)) { 3745 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3746 list_del(&t->th_list); 3747 kfree(t); 3748 return PTR_ERR(p); 3749 } 3750 kthread_bind(p, cpu); 3751 t->tsk = p; 3752 3753 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3754 &pktgen_thread_fops, t); 3755 if (!pe) { 3756 pr_err("cannot create %s/%s procfs entry\n", 3757 PG_PROC_DIR, t->tsk->comm); 3758 kthread_stop(p); 3759 list_del(&t->th_list); 3760 kfree(t); 3761 return -EINVAL; 3762 } 3763 3764 t->net = pn; 3765 get_task_struct(p); 3766 wake_up_process(p); 3767 wait_for_completion(&t->start_done); 3768 3769 return 0; 3770 } 3771 3772 /* 3773 * Removes a device from the thread if_list. 3774 */ 3775 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3776 struct pktgen_dev *pkt_dev) 3777 { 3778 struct list_head *q, *n; 3779 struct pktgen_dev *p; 3780 3781 if_lock(t); 3782 list_for_each_safe(q, n, &t->if_list) { 3783 p = list_entry(q, struct pktgen_dev, list); 3784 if (p == pkt_dev) 3785 list_del_rcu(&p->list); 3786 } 3787 if_unlock(t); 3788 } 3789 3790 static int pktgen_remove_device(struct pktgen_thread *t, 3791 struct pktgen_dev *pkt_dev) 3792 { 3793 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3794 3795 if (pkt_dev->running) { 3796 pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); 3797 pktgen_stop_device(pkt_dev); 3798 } 3799 3800 /* Dis-associate from the interface */ 3801 3802 if (pkt_dev->odev) { 3803 dev_put(pkt_dev->odev); 3804 pkt_dev->odev = NULL; 3805 } 3806 3807 /* Remove proc before if_list entry, because add_device uses 3808 * list to determine if interface already exist, avoid race 3809 * with proc_create_data() */ 3810 proc_remove(pkt_dev->entry); 3811 3812 /* And update the thread if_list */ 3813 _rem_dev_from_if_list(t, pkt_dev); 3814 3815 #ifdef CONFIG_XFRM 3816 free_SAs(pkt_dev); 3817 #endif 3818 vfree(pkt_dev->flows); 3819 if (pkt_dev->page) 3820 put_page(pkt_dev->page); 3821 kfree_rcu(pkt_dev, rcu); 3822 return 0; 3823 } 3824 3825 static int __net_init pg_net_init(struct net *net) 3826 { 3827 struct pktgen_net *pn = net_generic(net, pg_net_id); 3828 struct proc_dir_entry *pe; 3829 int cpu, ret = 0; 3830 3831 pn->net = net; 3832 INIT_LIST_HEAD(&pn->pktgen_threads); 3833 pn->pktgen_exiting = false; 3834 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3835 if (!pn->proc_dir) { 3836 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3837 return -ENODEV; 3838 } 3839 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3840 if (pe == NULL) { 3841 pr_err("cannot create %s procfs entry\n", PGCTRL); 3842 ret = -EINVAL; 3843 goto remove; 3844 } 3845 3846 for_each_online_cpu(cpu) { 3847 int err; 3848 3849 err = pktgen_create_thread(cpu, pn); 3850 if (err) 3851 pr_warn("Cannot create thread for cpu %d (%d)\n", 3852 cpu, err); 3853 } 3854 3855 if (list_empty(&pn->pktgen_threads)) { 3856 pr_err("Initialization failed for all threads\n"); 3857 ret = -ENODEV; 3858 goto remove_entry; 3859 } 3860 3861 return 0; 3862 3863 remove_entry: 3864 remove_proc_entry(PGCTRL, pn->proc_dir); 3865 remove: 3866 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3867 return ret; 3868 } 3869 3870 static void __net_exit pg_net_exit(struct net *net) 3871 { 3872 struct pktgen_net *pn = net_generic(net, pg_net_id); 3873 struct pktgen_thread *t; 3874 struct list_head *q, *n; 3875 LIST_HEAD(list); 3876 3877 /* Stop all interfaces & threads */ 3878 pn->pktgen_exiting = true; 3879 3880 mutex_lock(&pktgen_thread_lock); 3881 list_splice_init(&pn->pktgen_threads, &list); 3882 mutex_unlock(&pktgen_thread_lock); 3883 3884 list_for_each_safe(q, n, &list) { 3885 t = list_entry(q, struct pktgen_thread, th_list); 3886 list_del(&t->th_list); 3887 kthread_stop(t->tsk); 3888 put_task_struct(t->tsk); 3889 kfree(t); 3890 } 3891 3892 remove_proc_entry(PGCTRL, pn->proc_dir); 3893 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3894 } 3895 3896 static struct pernet_operations pg_net_ops = { 3897 .init = pg_net_init, 3898 .exit = pg_net_exit, 3899 .id = &pg_net_id, 3900 .size = sizeof(struct pktgen_net), 3901 }; 3902 3903 static int __init pg_init(void) 3904 { 3905 int ret = 0; 3906 3907 pr_info("%s", version); 3908 ret = register_pernet_subsys(&pg_net_ops); 3909 if (ret) 3910 return ret; 3911 ret = register_netdevice_notifier(&pktgen_notifier_block); 3912 if (ret) 3913 unregister_pernet_subsys(&pg_net_ops); 3914 3915 return ret; 3916 } 3917 3918 static void __exit pg_cleanup(void) 3919 { 3920 unregister_netdevice_notifier(&pktgen_notifier_block); 3921 unregister_pernet_subsys(&pg_net_ops); 3922 /* Don't need rcu_barrier() due to use of kfree_rcu() */ 3923 } 3924 3925 module_init(pg_init); 3926 module_exit(pg_cleanup); 3927 3928 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3929 MODULE_DESCRIPTION("Packet Generator tool"); 3930 MODULE_LICENSE("GPL"); 3931 MODULE_VERSION(VERSION); 3932 module_param(pg_count_d, int, 0); 3933 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3934 module_param(pg_delay_d, int, 0); 3935 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3936 module_param(pg_clone_skb_d, int, 0); 3937 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3938 module_param(debug, int, 0); 3939 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3940