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 #define M_QUEUE_XMIT 2 /* Inject packet into qdisc */ 217 218 /* If lock -- protects updating of if_list */ 219 #define if_lock(t) mutex_lock(&(t->if_lock)); 220 #define if_unlock(t) mutex_unlock(&(t->if_lock)); 221 222 /* Used to help with determining the pkts on receive */ 223 #define PKTGEN_MAGIC 0xbe9be955 224 #define PG_PROC_DIR "pktgen" 225 #define PGCTRL "pgctrl" 226 227 #define MAX_CFLOWS 65536 228 229 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 230 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 231 232 struct flow_state { 233 __be32 cur_daddr; 234 int count; 235 #ifdef CONFIG_XFRM 236 struct xfrm_state *x; 237 #endif 238 __u32 flags; 239 }; 240 241 /* flow flag bits */ 242 #define F_INIT (1<<0) /* flow has been initialized */ 243 244 struct pktgen_dev { 245 /* 246 * Try to keep frequent/infrequent used vars. separated. 247 */ 248 struct proc_dir_entry *entry; /* proc file */ 249 struct pktgen_thread *pg_thread;/* the owner */ 250 struct list_head list; /* chaining in the thread's run-queue */ 251 struct rcu_head rcu; /* freed by RCU */ 252 253 int running; /* if false, the test will stop */ 254 255 /* If min != max, then we will either do a linear iteration, or 256 * we will do a random selection from within the range. 257 */ 258 __u32 flags; 259 int xmit_mode; 260 int min_pkt_size; 261 int max_pkt_size; 262 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 263 int nfrags; 264 int removal_mark; /* non-zero => the device is marked for 265 * removal by worker thread */ 266 267 struct page *page; 268 u64 delay; /* nano-seconds */ 269 270 __u64 count; /* Default No packets to send */ 271 __u64 sofar; /* How many pkts we've sent so far */ 272 __u64 tx_bytes; /* How many bytes we've transmitted */ 273 __u64 errors; /* Errors when trying to transmit, */ 274 275 /* runtime counters relating to clone_skb */ 276 277 __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 unsigned 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 struct mutex 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 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) 631 seq_puts(seq, " xmit_mode: xmit_queue\n"); 632 633 seq_puts(seq, " Flags: "); 634 635 if (pkt_dev->flags & F_IPV6) 636 seq_puts(seq, "IPV6 "); 637 638 if (pkt_dev->flags & F_IPSRC_RND) 639 seq_puts(seq, "IPSRC_RND "); 640 641 if (pkt_dev->flags & F_IPDST_RND) 642 seq_puts(seq, "IPDST_RND "); 643 644 if (pkt_dev->flags & F_TXSIZE_RND) 645 seq_puts(seq, "TXSIZE_RND "); 646 647 if (pkt_dev->flags & F_UDPSRC_RND) 648 seq_puts(seq, "UDPSRC_RND "); 649 650 if (pkt_dev->flags & F_UDPDST_RND) 651 seq_puts(seq, "UDPDST_RND "); 652 653 if (pkt_dev->flags & F_UDPCSUM) 654 seq_puts(seq, "UDPCSUM "); 655 656 if (pkt_dev->flags & F_NO_TIMESTAMP) 657 seq_puts(seq, "NO_TIMESTAMP "); 658 659 if (pkt_dev->flags & F_MPLS_RND) 660 seq_puts(seq, "MPLS_RND "); 661 662 if (pkt_dev->flags & F_QUEUE_MAP_RND) 663 seq_puts(seq, "QUEUE_MAP_RND "); 664 665 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 666 seq_puts(seq, "QUEUE_MAP_CPU "); 667 668 if (pkt_dev->cflows) { 669 if (pkt_dev->flags & F_FLOW_SEQ) 670 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/ 671 else 672 seq_puts(seq, "FLOW_RND "); 673 } 674 675 #ifdef CONFIG_XFRM 676 if (pkt_dev->flags & F_IPSEC_ON) { 677 seq_puts(seq, "IPSEC "); 678 if (pkt_dev->spi) 679 seq_printf(seq, "spi:%u", pkt_dev->spi); 680 } 681 #endif 682 683 if (pkt_dev->flags & F_MACSRC_RND) 684 seq_puts(seq, "MACSRC_RND "); 685 686 if (pkt_dev->flags & F_MACDST_RND) 687 seq_puts(seq, "MACDST_RND "); 688 689 if (pkt_dev->flags & F_VID_RND) 690 seq_puts(seq, "VID_RND "); 691 692 if (pkt_dev->flags & F_SVID_RND) 693 seq_puts(seq, "SVID_RND "); 694 695 if (pkt_dev->flags & F_NODE) 696 seq_puts(seq, "NODE_ALLOC "); 697 698 seq_puts(seq, "\n"); 699 700 /* not really stopped, more like last-running-at */ 701 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 702 idle = pkt_dev->idle_acc; 703 do_div(idle, NSEC_PER_USEC); 704 705 seq_printf(seq, 706 "Current:\n pkts-sofar: %llu errors: %llu\n", 707 (unsigned long long)pkt_dev->sofar, 708 (unsigned long long)pkt_dev->errors); 709 710 seq_printf(seq, 711 " started: %lluus stopped: %lluus idle: %lluus\n", 712 (unsigned long long) ktime_to_us(pkt_dev->started_at), 713 (unsigned long long) ktime_to_us(stopped), 714 (unsigned long long) idle); 715 716 seq_printf(seq, 717 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 718 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 719 pkt_dev->cur_src_mac_offset); 720 721 if (pkt_dev->flags & F_IPV6) { 722 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 723 &pkt_dev->cur_in6_saddr, 724 &pkt_dev->cur_in6_daddr); 725 } else 726 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 727 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 728 729 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 730 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 731 732 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 733 734 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 735 736 if (pkt_dev->result[0]) 737 seq_printf(seq, "Result: %s\n", pkt_dev->result); 738 else 739 seq_puts(seq, "Result: Idle\n"); 740 741 return 0; 742 } 743 744 745 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 746 __u32 *num) 747 { 748 int i = 0; 749 *num = 0; 750 751 for (; i < maxlen; i++) { 752 int value; 753 char c; 754 *num <<= 4; 755 if (get_user(c, &user_buffer[i])) 756 return -EFAULT; 757 value = hex_to_bin(c); 758 if (value >= 0) 759 *num |= value; 760 else 761 break; 762 } 763 return i; 764 } 765 766 static int count_trail_chars(const char __user * user_buffer, 767 unsigned int maxlen) 768 { 769 int i; 770 771 for (i = 0; i < maxlen; i++) { 772 char c; 773 if (get_user(c, &user_buffer[i])) 774 return -EFAULT; 775 switch (c) { 776 case '\"': 777 case '\n': 778 case '\r': 779 case '\t': 780 case ' ': 781 case '=': 782 break; 783 default: 784 goto done; 785 } 786 } 787 done: 788 return i; 789 } 790 791 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 792 unsigned long *num) 793 { 794 int i; 795 *num = 0; 796 797 for (i = 0; i < maxlen; i++) { 798 char c; 799 if (get_user(c, &user_buffer[i])) 800 return -EFAULT; 801 if ((c >= '0') && (c <= '9')) { 802 *num *= 10; 803 *num += c - '0'; 804 } else 805 break; 806 } 807 return i; 808 } 809 810 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 811 { 812 int i; 813 814 for (i = 0; i < maxlen; i++) { 815 char c; 816 if (get_user(c, &user_buffer[i])) 817 return -EFAULT; 818 switch (c) { 819 case '\"': 820 case '\n': 821 case '\r': 822 case '\t': 823 case ' ': 824 goto done_str; 825 default: 826 break; 827 } 828 } 829 done_str: 830 return i; 831 } 832 833 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 834 { 835 unsigned int n = 0; 836 char c; 837 ssize_t i = 0; 838 int len; 839 840 pkt_dev->nr_labels = 0; 841 do { 842 __u32 tmp; 843 len = hex32_arg(&buffer[i], 8, &tmp); 844 if (len <= 0) 845 return len; 846 pkt_dev->labels[n] = htonl(tmp); 847 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 848 pkt_dev->flags |= F_MPLS_RND; 849 i += len; 850 if (get_user(c, &buffer[i])) 851 return -EFAULT; 852 i++; 853 n++; 854 if (n >= MAX_MPLS_LABELS) 855 return -E2BIG; 856 } while (c == ','); 857 858 pkt_dev->nr_labels = n; 859 return i; 860 } 861 862 static ssize_t pktgen_if_write(struct file *file, 863 const char __user * user_buffer, size_t count, 864 loff_t * offset) 865 { 866 struct seq_file *seq = file->private_data; 867 struct pktgen_dev *pkt_dev = seq->private; 868 int i, max, len; 869 char name[16], valstr[32]; 870 unsigned long value = 0; 871 char *pg_result = NULL; 872 int tmp = 0; 873 char buf[128]; 874 875 pg_result = &(pkt_dev->result[0]); 876 877 if (count < 1) { 878 pr_warn("wrong command format\n"); 879 return -EINVAL; 880 } 881 882 max = count; 883 tmp = count_trail_chars(user_buffer, max); 884 if (tmp < 0) { 885 pr_warn("illegal format\n"); 886 return tmp; 887 } 888 i = tmp; 889 890 /* Read variable name */ 891 892 len = strn_len(&user_buffer[i], sizeof(name) - 1); 893 if (len < 0) 894 return len; 895 896 memset(name, 0, sizeof(name)); 897 if (copy_from_user(name, &user_buffer[i], len)) 898 return -EFAULT; 899 i += len; 900 901 max = count - i; 902 len = count_trail_chars(&user_buffer[i], max); 903 if (len < 0) 904 return len; 905 906 i += len; 907 908 if (debug) { 909 size_t copy = min_t(size_t, count, 1023); 910 char tb[copy + 1]; 911 if (copy_from_user(tb, user_buffer, copy)) 912 return -EFAULT; 913 tb[copy] = 0; 914 pr_debug("%s,%lu buffer -:%s:-\n", 915 name, (unsigned long)count, tb); 916 } 917 918 if (!strcmp(name, "min_pkt_size")) { 919 len = num_arg(&user_buffer[i], 10, &value); 920 if (len < 0) 921 return len; 922 923 i += len; 924 if (value < 14 + 20 + 8) 925 value = 14 + 20 + 8; 926 if (value != pkt_dev->min_pkt_size) { 927 pkt_dev->min_pkt_size = value; 928 pkt_dev->cur_pkt_size = value; 929 } 930 sprintf(pg_result, "OK: min_pkt_size=%u", 931 pkt_dev->min_pkt_size); 932 return count; 933 } 934 935 if (!strcmp(name, "max_pkt_size")) { 936 len = num_arg(&user_buffer[i], 10, &value); 937 if (len < 0) 938 return len; 939 940 i += len; 941 if (value < 14 + 20 + 8) 942 value = 14 + 20 + 8; 943 if (value != pkt_dev->max_pkt_size) { 944 pkt_dev->max_pkt_size = value; 945 pkt_dev->cur_pkt_size = value; 946 } 947 sprintf(pg_result, "OK: max_pkt_size=%u", 948 pkt_dev->max_pkt_size); 949 return count; 950 } 951 952 /* Shortcut for min = max */ 953 954 if (!strcmp(name, "pkt_size")) { 955 len = num_arg(&user_buffer[i], 10, &value); 956 if (len < 0) 957 return len; 958 959 i += len; 960 if (value < 14 + 20 + 8) 961 value = 14 + 20 + 8; 962 if (value != pkt_dev->min_pkt_size) { 963 pkt_dev->min_pkt_size = value; 964 pkt_dev->max_pkt_size = value; 965 pkt_dev->cur_pkt_size = value; 966 } 967 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 968 return count; 969 } 970 971 if (!strcmp(name, "debug")) { 972 len = num_arg(&user_buffer[i], 10, &value); 973 if (len < 0) 974 return len; 975 976 i += len; 977 debug = value; 978 sprintf(pg_result, "OK: debug=%u", debug); 979 return count; 980 } 981 982 if (!strcmp(name, "frags")) { 983 len = num_arg(&user_buffer[i], 10, &value); 984 if (len < 0) 985 return len; 986 987 i += len; 988 pkt_dev->nfrags = value; 989 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 990 return count; 991 } 992 if (!strcmp(name, "delay")) { 993 len = num_arg(&user_buffer[i], 10, &value); 994 if (len < 0) 995 return len; 996 997 i += len; 998 if (value == 0x7FFFFFFF) 999 pkt_dev->delay = ULLONG_MAX; 1000 else 1001 pkt_dev->delay = (u64)value; 1002 1003 sprintf(pg_result, "OK: delay=%llu", 1004 (unsigned long long) pkt_dev->delay); 1005 return count; 1006 } 1007 if (!strcmp(name, "rate")) { 1008 len = num_arg(&user_buffer[i], 10, &value); 1009 if (len < 0) 1010 return len; 1011 1012 i += len; 1013 if (!value) 1014 return len; 1015 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 1016 if (debug) 1017 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1018 1019 sprintf(pg_result, "OK: rate=%lu", value); 1020 return count; 1021 } 1022 if (!strcmp(name, "ratep")) { 1023 len = num_arg(&user_buffer[i], 10, &value); 1024 if (len < 0) 1025 return len; 1026 1027 i += len; 1028 if (!value) 1029 return len; 1030 pkt_dev->delay = NSEC_PER_SEC/value; 1031 if (debug) 1032 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1033 1034 sprintf(pg_result, "OK: rate=%lu", value); 1035 return count; 1036 } 1037 if (!strcmp(name, "udp_src_min")) { 1038 len = num_arg(&user_buffer[i], 10, &value); 1039 if (len < 0) 1040 return len; 1041 1042 i += len; 1043 if (value != pkt_dev->udp_src_min) { 1044 pkt_dev->udp_src_min = value; 1045 pkt_dev->cur_udp_src = value; 1046 } 1047 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1048 return count; 1049 } 1050 if (!strcmp(name, "udp_dst_min")) { 1051 len = num_arg(&user_buffer[i], 10, &value); 1052 if (len < 0) 1053 return len; 1054 1055 i += len; 1056 if (value != pkt_dev->udp_dst_min) { 1057 pkt_dev->udp_dst_min = value; 1058 pkt_dev->cur_udp_dst = value; 1059 } 1060 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1061 return count; 1062 } 1063 if (!strcmp(name, "udp_src_max")) { 1064 len = num_arg(&user_buffer[i], 10, &value); 1065 if (len < 0) 1066 return len; 1067 1068 i += len; 1069 if (value != pkt_dev->udp_src_max) { 1070 pkt_dev->udp_src_max = value; 1071 pkt_dev->cur_udp_src = value; 1072 } 1073 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1074 return count; 1075 } 1076 if (!strcmp(name, "udp_dst_max")) { 1077 len = num_arg(&user_buffer[i], 10, &value); 1078 if (len < 0) 1079 return len; 1080 1081 i += len; 1082 if (value != pkt_dev->udp_dst_max) { 1083 pkt_dev->udp_dst_max = value; 1084 pkt_dev->cur_udp_dst = value; 1085 } 1086 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1087 return count; 1088 } 1089 if (!strcmp(name, "clone_skb")) { 1090 len = num_arg(&user_buffer[i], 10, &value); 1091 if (len < 0) 1092 return len; 1093 if ((value > 0) && 1094 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) || 1095 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1096 return -ENOTSUPP; 1097 i += len; 1098 pkt_dev->clone_skb = value; 1099 1100 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1101 return count; 1102 } 1103 if (!strcmp(name, "count")) { 1104 len = num_arg(&user_buffer[i], 10, &value); 1105 if (len < 0) 1106 return len; 1107 1108 i += len; 1109 pkt_dev->count = value; 1110 sprintf(pg_result, "OK: count=%llu", 1111 (unsigned long long)pkt_dev->count); 1112 return count; 1113 } 1114 if (!strcmp(name, "src_mac_count")) { 1115 len = num_arg(&user_buffer[i], 10, &value); 1116 if (len < 0) 1117 return len; 1118 1119 i += len; 1120 if (pkt_dev->src_mac_count != value) { 1121 pkt_dev->src_mac_count = value; 1122 pkt_dev->cur_src_mac_offset = 0; 1123 } 1124 sprintf(pg_result, "OK: src_mac_count=%d", 1125 pkt_dev->src_mac_count); 1126 return count; 1127 } 1128 if (!strcmp(name, "dst_mac_count")) { 1129 len = num_arg(&user_buffer[i], 10, &value); 1130 if (len < 0) 1131 return len; 1132 1133 i += len; 1134 if (pkt_dev->dst_mac_count != value) { 1135 pkt_dev->dst_mac_count = value; 1136 pkt_dev->cur_dst_mac_offset = 0; 1137 } 1138 sprintf(pg_result, "OK: dst_mac_count=%d", 1139 pkt_dev->dst_mac_count); 1140 return count; 1141 } 1142 if (!strcmp(name, "burst")) { 1143 len = num_arg(&user_buffer[i], 10, &value); 1144 if (len < 0) 1145 return len; 1146 1147 i += len; 1148 if ((value > 1) && 1149 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) || 1150 ((pkt_dev->xmit_mode == M_START_XMIT) && 1151 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))))) 1152 return -ENOTSUPP; 1153 pkt_dev->burst = value < 1 ? 1 : value; 1154 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst); 1155 return count; 1156 } 1157 if (!strcmp(name, "node")) { 1158 len = num_arg(&user_buffer[i], 10, &value); 1159 if (len < 0) 1160 return len; 1161 1162 i += len; 1163 1164 if (node_possible(value)) { 1165 pkt_dev->node = value; 1166 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1167 if (pkt_dev->page) { 1168 put_page(pkt_dev->page); 1169 pkt_dev->page = NULL; 1170 } 1171 } 1172 else 1173 sprintf(pg_result, "ERROR: node not possible"); 1174 return count; 1175 } 1176 if (!strcmp(name, "xmit_mode")) { 1177 char f[32]; 1178 1179 memset(f, 0, 32); 1180 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1181 if (len < 0) 1182 return len; 1183 1184 if (copy_from_user(f, &user_buffer[i], len)) 1185 return -EFAULT; 1186 i += len; 1187 1188 if (strcmp(f, "start_xmit") == 0) { 1189 pkt_dev->xmit_mode = M_START_XMIT; 1190 } else if (strcmp(f, "netif_receive") == 0) { 1191 /* clone_skb set earlier, not supported in this mode */ 1192 if (pkt_dev->clone_skb > 0) 1193 return -ENOTSUPP; 1194 1195 pkt_dev->xmit_mode = M_NETIF_RECEIVE; 1196 1197 /* make sure new packet is allocated every time 1198 * pktgen_xmit() is called 1199 */ 1200 pkt_dev->last_ok = 1; 1201 1202 /* override clone_skb if user passed default value 1203 * at module loading time 1204 */ 1205 pkt_dev->clone_skb = 0; 1206 } else if (strcmp(f, "queue_xmit") == 0) { 1207 pkt_dev->xmit_mode = M_QUEUE_XMIT; 1208 pkt_dev->last_ok = 1; 1209 } else { 1210 sprintf(pg_result, 1211 "xmit_mode -:%s:- unknown\nAvailable modes: %s", 1212 f, "start_xmit, netif_receive\n"); 1213 return count; 1214 } 1215 sprintf(pg_result, "OK: xmit_mode=%s", f); 1216 return count; 1217 } 1218 if (!strcmp(name, "flag")) { 1219 char f[32]; 1220 memset(f, 0, 32); 1221 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1222 if (len < 0) 1223 return len; 1224 1225 if (copy_from_user(f, &user_buffer[i], len)) 1226 return -EFAULT; 1227 i += len; 1228 if (strcmp(f, "IPSRC_RND") == 0) 1229 pkt_dev->flags |= F_IPSRC_RND; 1230 1231 else if (strcmp(f, "!IPSRC_RND") == 0) 1232 pkt_dev->flags &= ~F_IPSRC_RND; 1233 1234 else if (strcmp(f, "TXSIZE_RND") == 0) 1235 pkt_dev->flags |= F_TXSIZE_RND; 1236 1237 else if (strcmp(f, "!TXSIZE_RND") == 0) 1238 pkt_dev->flags &= ~F_TXSIZE_RND; 1239 1240 else if (strcmp(f, "IPDST_RND") == 0) 1241 pkt_dev->flags |= F_IPDST_RND; 1242 1243 else if (strcmp(f, "!IPDST_RND") == 0) 1244 pkt_dev->flags &= ~F_IPDST_RND; 1245 1246 else if (strcmp(f, "UDPSRC_RND") == 0) 1247 pkt_dev->flags |= F_UDPSRC_RND; 1248 1249 else if (strcmp(f, "!UDPSRC_RND") == 0) 1250 pkt_dev->flags &= ~F_UDPSRC_RND; 1251 1252 else if (strcmp(f, "UDPDST_RND") == 0) 1253 pkt_dev->flags |= F_UDPDST_RND; 1254 1255 else if (strcmp(f, "!UDPDST_RND") == 0) 1256 pkt_dev->flags &= ~F_UDPDST_RND; 1257 1258 else if (strcmp(f, "MACSRC_RND") == 0) 1259 pkt_dev->flags |= F_MACSRC_RND; 1260 1261 else if (strcmp(f, "!MACSRC_RND") == 0) 1262 pkt_dev->flags &= ~F_MACSRC_RND; 1263 1264 else if (strcmp(f, "MACDST_RND") == 0) 1265 pkt_dev->flags |= F_MACDST_RND; 1266 1267 else if (strcmp(f, "!MACDST_RND") == 0) 1268 pkt_dev->flags &= ~F_MACDST_RND; 1269 1270 else if (strcmp(f, "MPLS_RND") == 0) 1271 pkt_dev->flags |= F_MPLS_RND; 1272 1273 else if (strcmp(f, "!MPLS_RND") == 0) 1274 pkt_dev->flags &= ~F_MPLS_RND; 1275 1276 else if (strcmp(f, "VID_RND") == 0) 1277 pkt_dev->flags |= F_VID_RND; 1278 1279 else if (strcmp(f, "!VID_RND") == 0) 1280 pkt_dev->flags &= ~F_VID_RND; 1281 1282 else if (strcmp(f, "SVID_RND") == 0) 1283 pkt_dev->flags |= F_SVID_RND; 1284 1285 else if (strcmp(f, "!SVID_RND") == 0) 1286 pkt_dev->flags &= ~F_SVID_RND; 1287 1288 else if (strcmp(f, "FLOW_SEQ") == 0) 1289 pkt_dev->flags |= F_FLOW_SEQ; 1290 1291 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1292 pkt_dev->flags |= F_QUEUE_MAP_RND; 1293 1294 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1295 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1296 1297 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1298 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1299 1300 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1301 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1302 #ifdef CONFIG_XFRM 1303 else if (strcmp(f, "IPSEC") == 0) 1304 pkt_dev->flags |= F_IPSEC_ON; 1305 #endif 1306 1307 else if (strcmp(f, "!IPV6") == 0) 1308 pkt_dev->flags &= ~F_IPV6; 1309 1310 else if (strcmp(f, "NODE_ALLOC") == 0) 1311 pkt_dev->flags |= F_NODE; 1312 1313 else if (strcmp(f, "!NODE_ALLOC") == 0) 1314 pkt_dev->flags &= ~F_NODE; 1315 1316 else if (strcmp(f, "UDPCSUM") == 0) 1317 pkt_dev->flags |= F_UDPCSUM; 1318 1319 else if (strcmp(f, "!UDPCSUM") == 0) 1320 pkt_dev->flags &= ~F_UDPCSUM; 1321 1322 else if (strcmp(f, "NO_TIMESTAMP") == 0) 1323 pkt_dev->flags |= F_NO_TIMESTAMP; 1324 1325 else if (strcmp(f, "!NO_TIMESTAMP") == 0) 1326 pkt_dev->flags &= ~F_NO_TIMESTAMP; 1327 1328 else { 1329 sprintf(pg_result, 1330 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1331 f, 1332 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1333 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " 1334 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " 1335 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " 1336 "NO_TIMESTAMP, " 1337 #ifdef CONFIG_XFRM 1338 "IPSEC, " 1339 #endif 1340 "NODE_ALLOC\n"); 1341 return count; 1342 } 1343 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1344 return count; 1345 } 1346 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1347 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1348 if (len < 0) 1349 return len; 1350 1351 if (copy_from_user(buf, &user_buffer[i], len)) 1352 return -EFAULT; 1353 buf[len] = 0; 1354 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1355 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1356 strncpy(pkt_dev->dst_min, buf, len); 1357 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1358 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1359 } 1360 if (debug) 1361 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1362 i += len; 1363 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1364 return count; 1365 } 1366 if (!strcmp(name, "dst_max")) { 1367 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1368 if (len < 0) 1369 return len; 1370 1371 1372 if (copy_from_user(buf, &user_buffer[i], len)) 1373 return -EFAULT; 1374 1375 buf[len] = 0; 1376 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1377 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1378 strncpy(pkt_dev->dst_max, buf, len); 1379 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1380 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1381 } 1382 if (debug) 1383 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1384 i += len; 1385 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1386 return count; 1387 } 1388 if (!strcmp(name, "dst6")) { 1389 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1390 if (len < 0) 1391 return len; 1392 1393 pkt_dev->flags |= F_IPV6; 1394 1395 if (copy_from_user(buf, &user_buffer[i], len)) 1396 return -EFAULT; 1397 buf[len] = 0; 1398 1399 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1400 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1401 1402 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1403 1404 if (debug) 1405 pr_debug("dst6 set to: %s\n", buf); 1406 1407 i += len; 1408 sprintf(pg_result, "OK: dst6=%s", buf); 1409 return count; 1410 } 1411 if (!strcmp(name, "dst6_min")) { 1412 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1413 if (len < 0) 1414 return len; 1415 1416 pkt_dev->flags |= F_IPV6; 1417 1418 if (copy_from_user(buf, &user_buffer[i], len)) 1419 return -EFAULT; 1420 buf[len] = 0; 1421 1422 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1423 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1424 1425 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1426 if (debug) 1427 pr_debug("dst6_min set to: %s\n", buf); 1428 1429 i += len; 1430 sprintf(pg_result, "OK: dst6_min=%s", buf); 1431 return count; 1432 } 1433 if (!strcmp(name, "dst6_max")) { 1434 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1435 if (len < 0) 1436 return len; 1437 1438 pkt_dev->flags |= F_IPV6; 1439 1440 if (copy_from_user(buf, &user_buffer[i], len)) 1441 return -EFAULT; 1442 buf[len] = 0; 1443 1444 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1445 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1446 1447 if (debug) 1448 pr_debug("dst6_max set to: %s\n", buf); 1449 1450 i += len; 1451 sprintf(pg_result, "OK: dst6_max=%s", buf); 1452 return count; 1453 } 1454 if (!strcmp(name, "src6")) { 1455 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1456 if (len < 0) 1457 return len; 1458 1459 pkt_dev->flags |= F_IPV6; 1460 1461 if (copy_from_user(buf, &user_buffer[i], len)) 1462 return -EFAULT; 1463 buf[len] = 0; 1464 1465 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1466 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1467 1468 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1469 1470 if (debug) 1471 pr_debug("src6 set to: %s\n", buf); 1472 1473 i += len; 1474 sprintf(pg_result, "OK: src6=%s", buf); 1475 return count; 1476 } 1477 if (!strcmp(name, "src_min")) { 1478 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1479 if (len < 0) 1480 return len; 1481 1482 if (copy_from_user(buf, &user_buffer[i], len)) 1483 return -EFAULT; 1484 buf[len] = 0; 1485 if (strcmp(buf, pkt_dev->src_min) != 0) { 1486 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1487 strncpy(pkt_dev->src_min, buf, len); 1488 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1489 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1490 } 1491 if (debug) 1492 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1493 i += len; 1494 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1495 return count; 1496 } 1497 if (!strcmp(name, "src_max")) { 1498 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1499 if (len < 0) 1500 return len; 1501 1502 if (copy_from_user(buf, &user_buffer[i], len)) 1503 return -EFAULT; 1504 buf[len] = 0; 1505 if (strcmp(buf, pkt_dev->src_max) != 0) { 1506 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1507 strncpy(pkt_dev->src_max, buf, len); 1508 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1509 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1510 } 1511 if (debug) 1512 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1513 i += len; 1514 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1515 return count; 1516 } 1517 if (!strcmp(name, "dst_mac")) { 1518 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1519 if (len < 0) 1520 return len; 1521 1522 memset(valstr, 0, sizeof(valstr)); 1523 if (copy_from_user(valstr, &user_buffer[i], len)) 1524 return -EFAULT; 1525 1526 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1527 return -EINVAL; 1528 /* Set up Dest MAC */ 1529 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); 1530 1531 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1532 return count; 1533 } 1534 if (!strcmp(name, "src_mac")) { 1535 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1536 if (len < 0) 1537 return len; 1538 1539 memset(valstr, 0, sizeof(valstr)); 1540 if (copy_from_user(valstr, &user_buffer[i], len)) 1541 return -EFAULT; 1542 1543 if (!mac_pton(valstr, pkt_dev->src_mac)) 1544 return -EINVAL; 1545 /* Set up Src MAC */ 1546 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); 1547 1548 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1549 return count; 1550 } 1551 1552 if (!strcmp(name, "clear_counters")) { 1553 pktgen_clear_counters(pkt_dev); 1554 sprintf(pg_result, "OK: Clearing counters.\n"); 1555 return count; 1556 } 1557 1558 if (!strcmp(name, "flows")) { 1559 len = num_arg(&user_buffer[i], 10, &value); 1560 if (len < 0) 1561 return len; 1562 1563 i += len; 1564 if (value > MAX_CFLOWS) 1565 value = MAX_CFLOWS; 1566 1567 pkt_dev->cflows = value; 1568 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1569 return count; 1570 } 1571 #ifdef CONFIG_XFRM 1572 if (!strcmp(name, "spi")) { 1573 len = num_arg(&user_buffer[i], 10, &value); 1574 if (len < 0) 1575 return len; 1576 1577 i += len; 1578 pkt_dev->spi = value; 1579 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); 1580 return count; 1581 } 1582 #endif 1583 if (!strcmp(name, "flowlen")) { 1584 len = num_arg(&user_buffer[i], 10, &value); 1585 if (len < 0) 1586 return len; 1587 1588 i += len; 1589 pkt_dev->lflow = value; 1590 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1591 return count; 1592 } 1593 1594 if (!strcmp(name, "queue_map_min")) { 1595 len = num_arg(&user_buffer[i], 5, &value); 1596 if (len < 0) 1597 return len; 1598 1599 i += len; 1600 pkt_dev->queue_map_min = value; 1601 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1602 return count; 1603 } 1604 1605 if (!strcmp(name, "queue_map_max")) { 1606 len = num_arg(&user_buffer[i], 5, &value); 1607 if (len < 0) 1608 return len; 1609 1610 i += len; 1611 pkt_dev->queue_map_max = value; 1612 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1613 return count; 1614 } 1615 1616 if (!strcmp(name, "mpls")) { 1617 unsigned int n, cnt; 1618 1619 len = get_labels(&user_buffer[i], pkt_dev); 1620 if (len < 0) 1621 return len; 1622 i += len; 1623 cnt = sprintf(pg_result, "OK: mpls="); 1624 for (n = 0; n < pkt_dev->nr_labels; n++) 1625 cnt += sprintf(pg_result + cnt, 1626 "%08x%s", ntohl(pkt_dev->labels[n]), 1627 n == pkt_dev->nr_labels-1 ? "" : ","); 1628 1629 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1630 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1631 pkt_dev->svlan_id = 0xffff; 1632 1633 if (debug) 1634 pr_debug("VLAN/SVLAN auto turned off\n"); 1635 } 1636 return count; 1637 } 1638 1639 if (!strcmp(name, "vlan_id")) { 1640 len = num_arg(&user_buffer[i], 4, &value); 1641 if (len < 0) 1642 return len; 1643 1644 i += len; 1645 if (value <= 4095) { 1646 pkt_dev->vlan_id = value; /* turn on VLAN */ 1647 1648 if (debug) 1649 pr_debug("VLAN turned on\n"); 1650 1651 if (debug && pkt_dev->nr_labels) 1652 pr_debug("MPLS auto turned off\n"); 1653 1654 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1655 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1656 } else { 1657 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1658 pkt_dev->svlan_id = 0xffff; 1659 1660 if (debug) 1661 pr_debug("VLAN/SVLAN turned off\n"); 1662 } 1663 return count; 1664 } 1665 1666 if (!strcmp(name, "vlan_p")) { 1667 len = num_arg(&user_buffer[i], 1, &value); 1668 if (len < 0) 1669 return len; 1670 1671 i += len; 1672 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1673 pkt_dev->vlan_p = value; 1674 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1675 } else { 1676 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1677 } 1678 return count; 1679 } 1680 1681 if (!strcmp(name, "vlan_cfi")) { 1682 len = num_arg(&user_buffer[i], 1, &value); 1683 if (len < 0) 1684 return len; 1685 1686 i += len; 1687 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1688 pkt_dev->vlan_cfi = value; 1689 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1690 } else { 1691 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1692 } 1693 return count; 1694 } 1695 1696 if (!strcmp(name, "svlan_id")) { 1697 len = num_arg(&user_buffer[i], 4, &value); 1698 if (len < 0) 1699 return len; 1700 1701 i += len; 1702 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1703 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1704 1705 if (debug) 1706 pr_debug("SVLAN turned on\n"); 1707 1708 if (debug && pkt_dev->nr_labels) 1709 pr_debug("MPLS auto turned off\n"); 1710 1711 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1712 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1713 } else { 1714 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1715 pkt_dev->svlan_id = 0xffff; 1716 1717 if (debug) 1718 pr_debug("VLAN/SVLAN turned off\n"); 1719 } 1720 return count; 1721 } 1722 1723 if (!strcmp(name, "svlan_p")) { 1724 len = num_arg(&user_buffer[i], 1, &value); 1725 if (len < 0) 1726 return len; 1727 1728 i += len; 1729 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1730 pkt_dev->svlan_p = value; 1731 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1732 } else { 1733 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1734 } 1735 return count; 1736 } 1737 1738 if (!strcmp(name, "svlan_cfi")) { 1739 len = num_arg(&user_buffer[i], 1, &value); 1740 if (len < 0) 1741 return len; 1742 1743 i += len; 1744 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1745 pkt_dev->svlan_cfi = value; 1746 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1747 } else { 1748 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1749 } 1750 return count; 1751 } 1752 1753 if (!strcmp(name, "tos")) { 1754 __u32 tmp_value = 0; 1755 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1756 if (len < 0) 1757 return len; 1758 1759 i += len; 1760 if (len == 2) { 1761 pkt_dev->tos = tmp_value; 1762 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1763 } else { 1764 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1765 } 1766 return count; 1767 } 1768 1769 if (!strcmp(name, "traffic_class")) { 1770 __u32 tmp_value = 0; 1771 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1772 if (len < 0) 1773 return len; 1774 1775 i += len; 1776 if (len == 2) { 1777 pkt_dev->traffic_class = tmp_value; 1778 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1779 } else { 1780 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1781 } 1782 return count; 1783 } 1784 1785 if (!strcmp(name, "skb_priority")) { 1786 len = num_arg(&user_buffer[i], 9, &value); 1787 if (len < 0) 1788 return len; 1789 1790 i += len; 1791 pkt_dev->skb_priority = value; 1792 sprintf(pg_result, "OK: skb_priority=%i", 1793 pkt_dev->skb_priority); 1794 return count; 1795 } 1796 1797 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1798 return -EINVAL; 1799 } 1800 1801 static int pktgen_if_open(struct inode *inode, struct file *file) 1802 { 1803 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1804 } 1805 1806 static const struct file_operations pktgen_if_fops = { 1807 .owner = THIS_MODULE, 1808 .open = pktgen_if_open, 1809 .read = seq_read, 1810 .llseek = seq_lseek, 1811 .write = pktgen_if_write, 1812 .release = single_release, 1813 }; 1814 1815 static int pktgen_thread_show(struct seq_file *seq, void *v) 1816 { 1817 struct pktgen_thread *t = seq->private; 1818 const struct pktgen_dev *pkt_dev; 1819 1820 BUG_ON(!t); 1821 1822 seq_puts(seq, "Running: "); 1823 1824 rcu_read_lock(); 1825 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1826 if (pkt_dev->running) 1827 seq_printf(seq, "%s ", pkt_dev->odevname); 1828 1829 seq_puts(seq, "\nStopped: "); 1830 1831 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1832 if (!pkt_dev->running) 1833 seq_printf(seq, "%s ", pkt_dev->odevname); 1834 1835 if (t->result[0]) 1836 seq_printf(seq, "\nResult: %s\n", t->result); 1837 else 1838 seq_puts(seq, "\nResult: NA\n"); 1839 1840 rcu_read_unlock(); 1841 1842 return 0; 1843 } 1844 1845 static ssize_t pktgen_thread_write(struct file *file, 1846 const char __user * user_buffer, 1847 size_t count, loff_t * offset) 1848 { 1849 struct seq_file *seq = file->private_data; 1850 struct pktgen_thread *t = seq->private; 1851 int i, max, len, ret; 1852 char name[40]; 1853 char *pg_result; 1854 1855 if (count < 1) { 1856 // sprintf(pg_result, "Wrong command format"); 1857 return -EINVAL; 1858 } 1859 1860 max = count; 1861 len = count_trail_chars(user_buffer, max); 1862 if (len < 0) 1863 return len; 1864 1865 i = len; 1866 1867 /* Read variable name */ 1868 1869 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1870 if (len < 0) 1871 return len; 1872 1873 memset(name, 0, sizeof(name)); 1874 if (copy_from_user(name, &user_buffer[i], len)) 1875 return -EFAULT; 1876 i += len; 1877 1878 max = count - i; 1879 len = count_trail_chars(&user_buffer[i], max); 1880 if (len < 0) 1881 return len; 1882 1883 i += len; 1884 1885 if (debug) 1886 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1887 1888 if (!t) { 1889 pr_err("ERROR: No thread\n"); 1890 ret = -EINVAL; 1891 goto out; 1892 } 1893 1894 pg_result = &(t->result[0]); 1895 1896 if (!strcmp(name, "add_device")) { 1897 char f[32]; 1898 memset(f, 0, 32); 1899 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1900 if (len < 0) { 1901 ret = len; 1902 goto out; 1903 } 1904 if (copy_from_user(f, &user_buffer[i], len)) 1905 return -EFAULT; 1906 i += len; 1907 mutex_lock(&pktgen_thread_lock); 1908 ret = pktgen_add_device(t, f); 1909 mutex_unlock(&pktgen_thread_lock); 1910 if (!ret) { 1911 ret = count; 1912 sprintf(pg_result, "OK: add_device=%s", f); 1913 } else 1914 sprintf(pg_result, "ERROR: can not add device %s", f); 1915 goto out; 1916 } 1917 1918 if (!strcmp(name, "rem_device_all")) { 1919 mutex_lock(&pktgen_thread_lock); 1920 t->control |= T_REMDEVALL; 1921 mutex_unlock(&pktgen_thread_lock); 1922 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1923 ret = count; 1924 sprintf(pg_result, "OK: rem_device_all"); 1925 goto out; 1926 } 1927 1928 if (!strcmp(name, "max_before_softirq")) { 1929 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1930 ret = count; 1931 goto out; 1932 } 1933 1934 ret = -EINVAL; 1935 out: 1936 return ret; 1937 } 1938 1939 static int pktgen_thread_open(struct inode *inode, struct file *file) 1940 { 1941 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1942 } 1943 1944 static const struct file_operations pktgen_thread_fops = { 1945 .owner = THIS_MODULE, 1946 .open = pktgen_thread_open, 1947 .read = seq_read, 1948 .llseek = seq_lseek, 1949 .write = pktgen_thread_write, 1950 .release = single_release, 1951 }; 1952 1953 /* Think find or remove for NN */ 1954 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1955 const char *ifname, int remove) 1956 { 1957 struct pktgen_thread *t; 1958 struct pktgen_dev *pkt_dev = NULL; 1959 bool exact = (remove == FIND); 1960 1961 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1962 pkt_dev = pktgen_find_dev(t, ifname, exact); 1963 if (pkt_dev) { 1964 if (remove) { 1965 pkt_dev->removal_mark = 1; 1966 t->control |= T_REMDEV; 1967 } 1968 break; 1969 } 1970 } 1971 return pkt_dev; 1972 } 1973 1974 /* 1975 * mark a device for removal 1976 */ 1977 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1978 { 1979 struct pktgen_dev *pkt_dev = NULL; 1980 const int max_tries = 10, msec_per_try = 125; 1981 int i = 0; 1982 1983 mutex_lock(&pktgen_thread_lock); 1984 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1985 1986 while (1) { 1987 1988 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1989 if (pkt_dev == NULL) 1990 break; /* success */ 1991 1992 mutex_unlock(&pktgen_thread_lock); 1993 pr_debug("%s: waiting for %s to disappear....\n", 1994 __func__, ifname); 1995 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1996 mutex_lock(&pktgen_thread_lock); 1997 1998 if (++i >= max_tries) { 1999 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 2000 __func__, msec_per_try * i, ifname); 2001 break; 2002 } 2003 2004 } 2005 2006 mutex_unlock(&pktgen_thread_lock); 2007 } 2008 2009 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 2010 { 2011 struct pktgen_thread *t; 2012 2013 mutex_lock(&pktgen_thread_lock); 2014 2015 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 2016 struct pktgen_dev *pkt_dev; 2017 2018 if_lock(t); 2019 list_for_each_entry(pkt_dev, &t->if_list, list) { 2020 if (pkt_dev->odev != dev) 2021 continue; 2022 2023 proc_remove(pkt_dev->entry); 2024 2025 pkt_dev->entry = proc_create_data(dev->name, 0600, 2026 pn->proc_dir, 2027 &pktgen_if_fops, 2028 pkt_dev); 2029 if (!pkt_dev->entry) 2030 pr_err("can't move proc entry for '%s'\n", 2031 dev->name); 2032 break; 2033 } 2034 if_unlock(t); 2035 } 2036 mutex_unlock(&pktgen_thread_lock); 2037 } 2038 2039 static int pktgen_device_event(struct notifier_block *unused, 2040 unsigned long event, void *ptr) 2041 { 2042 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2043 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 2044 2045 if (pn->pktgen_exiting) 2046 return NOTIFY_DONE; 2047 2048 /* It is OK that we do not hold the group lock right now, 2049 * as we run under the RTNL lock. 2050 */ 2051 2052 switch (event) { 2053 case NETDEV_CHANGENAME: 2054 pktgen_change_name(pn, dev); 2055 break; 2056 2057 case NETDEV_UNREGISTER: 2058 pktgen_mark_device(pn, dev->name); 2059 break; 2060 } 2061 2062 return NOTIFY_DONE; 2063 } 2064 2065 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 2066 struct pktgen_dev *pkt_dev, 2067 const char *ifname) 2068 { 2069 char b[IFNAMSIZ+5]; 2070 int i; 2071 2072 for (i = 0; ifname[i] != '@'; i++) { 2073 if (i == IFNAMSIZ) 2074 break; 2075 2076 b[i] = ifname[i]; 2077 } 2078 b[i] = 0; 2079 2080 return dev_get_by_name(pn->net, b); 2081 } 2082 2083 2084 /* Associate pktgen_dev with a device. */ 2085 2086 static int pktgen_setup_dev(const struct pktgen_net *pn, 2087 struct pktgen_dev *pkt_dev, const char *ifname) 2088 { 2089 struct net_device *odev; 2090 int err; 2091 2092 /* Clean old setups */ 2093 if (pkt_dev->odev) { 2094 dev_put(pkt_dev->odev); 2095 pkt_dev->odev = NULL; 2096 } 2097 2098 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 2099 if (!odev) { 2100 pr_err("no such netdevice: \"%s\"\n", ifname); 2101 return -ENODEV; 2102 } 2103 2104 if (odev->type != ARPHRD_ETHER) { 2105 pr_err("not an ethernet device: \"%s\"\n", ifname); 2106 err = -EINVAL; 2107 } else if (!netif_running(odev)) { 2108 pr_err("device is down: \"%s\"\n", ifname); 2109 err = -ENETDOWN; 2110 } else { 2111 pkt_dev->odev = odev; 2112 return 0; 2113 } 2114 2115 dev_put(odev); 2116 return err; 2117 } 2118 2119 /* Read pkt_dev from the interface and set up internal pktgen_dev 2120 * structure to have the right information to create/send packets 2121 */ 2122 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2123 { 2124 int ntxq; 2125 2126 if (!pkt_dev->odev) { 2127 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2128 sprintf(pkt_dev->result, 2129 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2130 return; 2131 } 2132 2133 /* make sure that we don't pick a non-existing transmit queue */ 2134 ntxq = pkt_dev->odev->real_num_tx_queues; 2135 2136 if (ntxq <= pkt_dev->queue_map_min) { 2137 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2138 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2139 pkt_dev->odevname); 2140 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2141 } 2142 if (pkt_dev->queue_map_max >= ntxq) { 2143 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2144 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2145 pkt_dev->odevname); 2146 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2147 } 2148 2149 /* Default to the interface's mac if not explicitly set. */ 2150 2151 if (is_zero_ether_addr(pkt_dev->src_mac)) 2152 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); 2153 2154 /* Set up Dest MAC */ 2155 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); 2156 2157 if (pkt_dev->flags & F_IPV6) { 2158 int i, set = 0, err = 1; 2159 struct inet6_dev *idev; 2160 2161 if (pkt_dev->min_pkt_size == 0) { 2162 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2163 + sizeof(struct udphdr) 2164 + sizeof(struct pktgen_hdr) 2165 + pkt_dev->pkt_overhead; 2166 } 2167 2168 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2169 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2170 set = 1; 2171 break; 2172 } 2173 2174 if (!set) { 2175 2176 /* 2177 * Use linklevel address if unconfigured. 2178 * 2179 * use ipv6_get_lladdr if/when it's get exported 2180 */ 2181 2182 rcu_read_lock(); 2183 idev = __in6_dev_get(pkt_dev->odev); 2184 if (idev) { 2185 struct inet6_ifaddr *ifp; 2186 2187 read_lock_bh(&idev->lock); 2188 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2189 if ((ifp->scope & IFA_LINK) && 2190 !(ifp->flags & IFA_F_TENTATIVE)) { 2191 pkt_dev->cur_in6_saddr = ifp->addr; 2192 err = 0; 2193 break; 2194 } 2195 } 2196 read_unlock_bh(&idev->lock); 2197 } 2198 rcu_read_unlock(); 2199 if (err) 2200 pr_err("ERROR: IPv6 link address not available\n"); 2201 } 2202 } else { 2203 if (pkt_dev->min_pkt_size == 0) { 2204 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2205 + sizeof(struct udphdr) 2206 + sizeof(struct pktgen_hdr) 2207 + pkt_dev->pkt_overhead; 2208 } 2209 2210 pkt_dev->saddr_min = 0; 2211 pkt_dev->saddr_max = 0; 2212 if (strlen(pkt_dev->src_min) == 0) { 2213 2214 struct in_device *in_dev; 2215 2216 rcu_read_lock(); 2217 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2218 if (in_dev) { 2219 if (in_dev->ifa_list) { 2220 pkt_dev->saddr_min = 2221 in_dev->ifa_list->ifa_address; 2222 pkt_dev->saddr_max = pkt_dev->saddr_min; 2223 } 2224 } 2225 rcu_read_unlock(); 2226 } else { 2227 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2228 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2229 } 2230 2231 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2232 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2233 } 2234 /* Initialize current values. */ 2235 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2236 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2237 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2238 2239 pkt_dev->cur_dst_mac_offset = 0; 2240 pkt_dev->cur_src_mac_offset = 0; 2241 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2242 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2243 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2244 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2245 pkt_dev->nflows = 0; 2246 } 2247 2248 2249 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2250 { 2251 ktime_t start_time, end_time; 2252 s64 remaining; 2253 struct hrtimer_sleeper t; 2254 2255 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2256 hrtimer_set_expires(&t.timer, spin_until); 2257 2258 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2259 if (remaining <= 0) 2260 goto out; 2261 2262 start_time = ktime_get(); 2263 if (remaining < 100000) { 2264 /* for small delays (<100us), just loop until limit is reached */ 2265 do { 2266 end_time = ktime_get(); 2267 } while (ktime_compare(end_time, spin_until) < 0); 2268 } else { 2269 /* see do_nanosleep */ 2270 hrtimer_init_sleeper(&t, current); 2271 do { 2272 set_current_state(TASK_INTERRUPTIBLE); 2273 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2274 2275 if (likely(t.task)) 2276 schedule(); 2277 2278 hrtimer_cancel(&t.timer); 2279 } while (t.task && pkt_dev->running && !signal_pending(current)); 2280 __set_current_state(TASK_RUNNING); 2281 end_time = ktime_get(); 2282 } 2283 2284 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2285 out: 2286 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2287 destroy_hrtimer_on_stack(&t.timer); 2288 } 2289 2290 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2291 { 2292 pkt_dev->pkt_overhead = 0; 2293 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2294 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2295 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2296 } 2297 2298 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2299 { 2300 return !!(pkt_dev->flows[flow].flags & F_INIT); 2301 } 2302 2303 static inline int f_pick(struct pktgen_dev *pkt_dev) 2304 { 2305 int flow = pkt_dev->curfl; 2306 2307 if (pkt_dev->flags & F_FLOW_SEQ) { 2308 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2309 /* reset time */ 2310 pkt_dev->flows[flow].count = 0; 2311 pkt_dev->flows[flow].flags = 0; 2312 pkt_dev->curfl += 1; 2313 if (pkt_dev->curfl >= pkt_dev->cflows) 2314 pkt_dev->curfl = 0; /*reset */ 2315 } 2316 } else { 2317 flow = prandom_u32() % pkt_dev->cflows; 2318 pkt_dev->curfl = flow; 2319 2320 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2321 pkt_dev->flows[flow].count = 0; 2322 pkt_dev->flows[flow].flags = 0; 2323 } 2324 } 2325 2326 return pkt_dev->curfl; 2327 } 2328 2329 2330 #ifdef CONFIG_XFRM 2331 /* If there was already an IPSEC SA, we keep it as is, else 2332 * we go look for it ... 2333 */ 2334 #define DUMMY_MARK 0 2335 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2336 { 2337 struct xfrm_state *x = pkt_dev->flows[flow].x; 2338 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2339 if (!x) { 2340 2341 if (pkt_dev->spi) { 2342 /* We need as quick as possible to find the right SA 2343 * Searching with minimum criteria to archieve this. 2344 */ 2345 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); 2346 } else { 2347 /* slow path: we dont already have xfrm_state */ 2348 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2349 (xfrm_address_t *)&pkt_dev->cur_daddr, 2350 (xfrm_address_t *)&pkt_dev->cur_saddr, 2351 AF_INET, 2352 pkt_dev->ipsmode, 2353 pkt_dev->ipsproto, 0); 2354 } 2355 if (x) { 2356 pkt_dev->flows[flow].x = x; 2357 set_pkt_overhead(pkt_dev); 2358 pkt_dev->pkt_overhead += x->props.header_len; 2359 } 2360 2361 } 2362 } 2363 #endif 2364 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2365 { 2366 2367 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2368 pkt_dev->cur_queue_map = smp_processor_id(); 2369 2370 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2371 __u16 t; 2372 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2373 t = prandom_u32() % 2374 (pkt_dev->queue_map_max - 2375 pkt_dev->queue_map_min + 1) 2376 + pkt_dev->queue_map_min; 2377 } else { 2378 t = pkt_dev->cur_queue_map + 1; 2379 if (t > pkt_dev->queue_map_max) 2380 t = pkt_dev->queue_map_min; 2381 } 2382 pkt_dev->cur_queue_map = t; 2383 } 2384 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2385 } 2386 2387 /* Increment/randomize headers according to flags and current values 2388 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2389 */ 2390 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2391 { 2392 __u32 imn; 2393 __u32 imx; 2394 int flow = 0; 2395 2396 if (pkt_dev->cflows) 2397 flow = f_pick(pkt_dev); 2398 2399 /* Deal with source MAC */ 2400 if (pkt_dev->src_mac_count > 1) { 2401 __u32 mc; 2402 __u32 tmp; 2403 2404 if (pkt_dev->flags & F_MACSRC_RND) 2405 mc = prandom_u32() % pkt_dev->src_mac_count; 2406 else { 2407 mc = pkt_dev->cur_src_mac_offset++; 2408 if (pkt_dev->cur_src_mac_offset >= 2409 pkt_dev->src_mac_count) 2410 pkt_dev->cur_src_mac_offset = 0; 2411 } 2412 2413 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2414 pkt_dev->hh[11] = tmp; 2415 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2416 pkt_dev->hh[10] = tmp; 2417 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2418 pkt_dev->hh[9] = tmp; 2419 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2420 pkt_dev->hh[8] = tmp; 2421 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2422 pkt_dev->hh[7] = tmp; 2423 } 2424 2425 /* Deal with Destination MAC */ 2426 if (pkt_dev->dst_mac_count > 1) { 2427 __u32 mc; 2428 __u32 tmp; 2429 2430 if (pkt_dev->flags & F_MACDST_RND) 2431 mc = prandom_u32() % pkt_dev->dst_mac_count; 2432 2433 else { 2434 mc = pkt_dev->cur_dst_mac_offset++; 2435 if (pkt_dev->cur_dst_mac_offset >= 2436 pkt_dev->dst_mac_count) { 2437 pkt_dev->cur_dst_mac_offset = 0; 2438 } 2439 } 2440 2441 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2442 pkt_dev->hh[5] = tmp; 2443 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2444 pkt_dev->hh[4] = tmp; 2445 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2446 pkt_dev->hh[3] = tmp; 2447 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2448 pkt_dev->hh[2] = tmp; 2449 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2450 pkt_dev->hh[1] = tmp; 2451 } 2452 2453 if (pkt_dev->flags & F_MPLS_RND) { 2454 unsigned int i; 2455 for (i = 0; i < pkt_dev->nr_labels; i++) 2456 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2457 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2458 ((__force __be32)prandom_u32() & 2459 htonl(0x000fffff)); 2460 } 2461 2462 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2463 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2464 } 2465 2466 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2467 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2468 } 2469 2470 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2471 if (pkt_dev->flags & F_UDPSRC_RND) 2472 pkt_dev->cur_udp_src = prandom_u32() % 2473 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2474 + pkt_dev->udp_src_min; 2475 2476 else { 2477 pkt_dev->cur_udp_src++; 2478 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2479 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2480 } 2481 } 2482 2483 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2484 if (pkt_dev->flags & F_UDPDST_RND) { 2485 pkt_dev->cur_udp_dst = prandom_u32() % 2486 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2487 + pkt_dev->udp_dst_min; 2488 } else { 2489 pkt_dev->cur_udp_dst++; 2490 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2491 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2492 } 2493 } 2494 2495 if (!(pkt_dev->flags & F_IPV6)) { 2496 2497 imn = ntohl(pkt_dev->saddr_min); 2498 imx = ntohl(pkt_dev->saddr_max); 2499 if (imn < imx) { 2500 __u32 t; 2501 if (pkt_dev->flags & F_IPSRC_RND) 2502 t = prandom_u32() % (imx - imn) + imn; 2503 else { 2504 t = ntohl(pkt_dev->cur_saddr); 2505 t++; 2506 if (t > imx) 2507 t = imn; 2508 2509 } 2510 pkt_dev->cur_saddr = htonl(t); 2511 } 2512 2513 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2514 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2515 } else { 2516 imn = ntohl(pkt_dev->daddr_min); 2517 imx = ntohl(pkt_dev->daddr_max); 2518 if (imn < imx) { 2519 __u32 t; 2520 __be32 s; 2521 if (pkt_dev->flags & F_IPDST_RND) { 2522 2523 do { 2524 t = prandom_u32() % 2525 (imx - imn) + imn; 2526 s = htonl(t); 2527 } while (ipv4_is_loopback(s) || 2528 ipv4_is_multicast(s) || 2529 ipv4_is_lbcast(s) || 2530 ipv4_is_zeronet(s) || 2531 ipv4_is_local_multicast(s)); 2532 pkt_dev->cur_daddr = s; 2533 } else { 2534 t = ntohl(pkt_dev->cur_daddr); 2535 t++; 2536 if (t > imx) { 2537 t = imn; 2538 } 2539 pkt_dev->cur_daddr = htonl(t); 2540 } 2541 } 2542 if (pkt_dev->cflows) { 2543 pkt_dev->flows[flow].flags |= F_INIT; 2544 pkt_dev->flows[flow].cur_daddr = 2545 pkt_dev->cur_daddr; 2546 #ifdef CONFIG_XFRM 2547 if (pkt_dev->flags & F_IPSEC_ON) 2548 get_ipsec_sa(pkt_dev, flow); 2549 #endif 2550 pkt_dev->nflows++; 2551 } 2552 } 2553 } else { /* IPV6 * */ 2554 2555 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2556 int i; 2557 2558 /* Only random destinations yet */ 2559 2560 for (i = 0; i < 4; i++) { 2561 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2562 (((__force __be32)prandom_u32() | 2563 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2564 pkt_dev->max_in6_daddr.s6_addr32[i]); 2565 } 2566 } 2567 } 2568 2569 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2570 __u32 t; 2571 if (pkt_dev->flags & F_TXSIZE_RND) { 2572 t = prandom_u32() % 2573 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2574 + pkt_dev->min_pkt_size; 2575 } else { 2576 t = pkt_dev->cur_pkt_size + 1; 2577 if (t > pkt_dev->max_pkt_size) 2578 t = pkt_dev->min_pkt_size; 2579 } 2580 pkt_dev->cur_pkt_size = t; 2581 } 2582 2583 set_cur_queue_map(pkt_dev); 2584 2585 pkt_dev->flows[flow].count++; 2586 } 2587 2588 2589 #ifdef CONFIG_XFRM 2590 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { 2591 2592 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ 2593 }; 2594 2595 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2596 { 2597 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2598 int err = 0; 2599 struct net *net = dev_net(pkt_dev->odev); 2600 2601 if (!x) 2602 return 0; 2603 /* XXX: we dont support tunnel mode for now until 2604 * we resolve the dst issue */ 2605 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) 2606 return 0; 2607 2608 /* But when user specify an valid SPI, transformation 2609 * supports both transport/tunnel mode + ESP/AH type. 2610 */ 2611 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) 2612 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; 2613 2614 rcu_read_lock_bh(); 2615 err = x->outer_mode->output(x, skb); 2616 rcu_read_unlock_bh(); 2617 if (err) { 2618 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); 2619 goto error; 2620 } 2621 err = x->type->output(x, skb); 2622 if (err) { 2623 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); 2624 goto error; 2625 } 2626 spin_lock_bh(&x->lock); 2627 x->curlft.bytes += skb->len; 2628 x->curlft.packets++; 2629 spin_unlock_bh(&x->lock); 2630 error: 2631 return err; 2632 } 2633 2634 static void free_SAs(struct pktgen_dev *pkt_dev) 2635 { 2636 if (pkt_dev->cflows) { 2637 /* let go of the SAs if we have them */ 2638 int i; 2639 for (i = 0; i < pkt_dev->cflows; i++) { 2640 struct xfrm_state *x = pkt_dev->flows[i].x; 2641 if (x) { 2642 xfrm_state_put(x); 2643 pkt_dev->flows[i].x = NULL; 2644 } 2645 } 2646 } 2647 } 2648 2649 static int process_ipsec(struct pktgen_dev *pkt_dev, 2650 struct sk_buff *skb, __be16 protocol) 2651 { 2652 if (pkt_dev->flags & F_IPSEC_ON) { 2653 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2654 int nhead = 0; 2655 if (x) { 2656 struct ethhdr *eth; 2657 struct iphdr *iph; 2658 int ret; 2659 2660 nhead = x->props.header_len - skb_headroom(skb); 2661 if (nhead > 0) { 2662 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2663 if (ret < 0) { 2664 pr_err("Error expanding ipsec packet %d\n", 2665 ret); 2666 goto err; 2667 } 2668 } 2669 2670 /* ipsec is not expecting ll header */ 2671 skb_pull(skb, ETH_HLEN); 2672 ret = pktgen_output_ipsec(skb, pkt_dev); 2673 if (ret) { 2674 pr_err("Error creating ipsec packet %d\n", ret); 2675 goto err; 2676 } 2677 /* restore ll */ 2678 eth = skb_push(skb, ETH_HLEN); 2679 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN); 2680 eth->h_proto = protocol; 2681 2682 /* Update IPv4 header len as well as checksum value */ 2683 iph = ip_hdr(skb); 2684 iph->tot_len = htons(skb->len - ETH_HLEN); 2685 ip_send_check(iph); 2686 } 2687 } 2688 return 1; 2689 err: 2690 kfree_skb(skb); 2691 return 0; 2692 } 2693 #endif 2694 2695 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2696 { 2697 unsigned int i; 2698 for (i = 0; i < pkt_dev->nr_labels; i++) 2699 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2700 2701 mpls--; 2702 *mpls |= MPLS_STACK_BOTTOM; 2703 } 2704 2705 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2706 unsigned int prio) 2707 { 2708 return htons(id | (cfi << 12) | (prio << 13)); 2709 } 2710 2711 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2712 int datalen) 2713 { 2714 struct timeval timestamp; 2715 struct pktgen_hdr *pgh; 2716 2717 pgh = skb_put(skb, sizeof(*pgh)); 2718 datalen -= sizeof(*pgh); 2719 2720 if (pkt_dev->nfrags <= 0) { 2721 skb_put_zero(skb, datalen); 2722 } else { 2723 int frags = pkt_dev->nfrags; 2724 int i, len; 2725 int frag_len; 2726 2727 2728 if (frags > MAX_SKB_FRAGS) 2729 frags = MAX_SKB_FRAGS; 2730 len = datalen - frags * PAGE_SIZE; 2731 if (len > 0) { 2732 skb_put_zero(skb, len); 2733 datalen = frags * PAGE_SIZE; 2734 } 2735 2736 i = 0; 2737 frag_len = (datalen/frags) < PAGE_SIZE ? 2738 (datalen/frags) : PAGE_SIZE; 2739 while (datalen > 0) { 2740 if (unlikely(!pkt_dev->page)) { 2741 int node = numa_node_id(); 2742 2743 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2744 node = pkt_dev->node; 2745 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2746 if (!pkt_dev->page) 2747 break; 2748 } 2749 get_page(pkt_dev->page); 2750 skb_frag_set_page(skb, i, pkt_dev->page); 2751 skb_shinfo(skb)->frags[i].page_offset = 0; 2752 /*last fragment, fill rest of data*/ 2753 if (i == (frags - 1)) 2754 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2755 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2756 else 2757 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2758 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2759 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2760 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2761 i++; 2762 skb_shinfo(skb)->nr_frags = i; 2763 } 2764 } 2765 2766 /* Stamp the time, and sequence number, 2767 * convert them to network byte order 2768 */ 2769 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2770 pgh->seq_num = htonl(pkt_dev->seq_num); 2771 2772 if (pkt_dev->flags & F_NO_TIMESTAMP) { 2773 pgh->tv_sec = 0; 2774 pgh->tv_usec = 0; 2775 } else { 2776 do_gettimeofday(×tamp); 2777 pgh->tv_sec = htonl(timestamp.tv_sec); 2778 pgh->tv_usec = htonl(timestamp.tv_usec); 2779 } 2780 } 2781 2782 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2783 struct pktgen_dev *pkt_dev) 2784 { 2785 unsigned int extralen = LL_RESERVED_SPACE(dev); 2786 struct sk_buff *skb = NULL; 2787 unsigned int size; 2788 2789 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead; 2790 if (pkt_dev->flags & F_NODE) { 2791 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2792 2793 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2794 if (likely(skb)) { 2795 skb_reserve(skb, NET_SKB_PAD); 2796 skb->dev = dev; 2797 } 2798 } else { 2799 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2800 } 2801 2802 /* the caller pre-fetches from skb->data and reserves for the mac hdr */ 2803 if (likely(skb)) 2804 skb_reserve(skb, extralen - 16); 2805 2806 return skb; 2807 } 2808 2809 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2810 struct pktgen_dev *pkt_dev) 2811 { 2812 struct sk_buff *skb = NULL; 2813 __u8 *eth; 2814 struct udphdr *udph; 2815 int datalen, iplen; 2816 struct iphdr *iph; 2817 __be16 protocol = htons(ETH_P_IP); 2818 __be32 *mpls; 2819 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2820 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2821 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2822 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2823 u16 queue_map; 2824 2825 if (pkt_dev->nr_labels) 2826 protocol = htons(ETH_P_MPLS_UC); 2827 2828 if (pkt_dev->vlan_id != 0xffff) 2829 protocol = htons(ETH_P_8021Q); 2830 2831 /* Update any of the values, used when we're incrementing various 2832 * fields. 2833 */ 2834 mod_cur_headers(pkt_dev); 2835 queue_map = pkt_dev->cur_queue_map; 2836 2837 skb = pktgen_alloc_skb(odev, pkt_dev); 2838 if (!skb) { 2839 sprintf(pkt_dev->result, "No memory"); 2840 return NULL; 2841 } 2842 2843 prefetchw(skb->data); 2844 skb_reserve(skb, 16); 2845 2846 /* Reserve for ethernet and IP header */ 2847 eth = skb_push(skb, 14); 2848 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); 2849 if (pkt_dev->nr_labels) 2850 mpls_push(mpls, pkt_dev); 2851 2852 if (pkt_dev->vlan_id != 0xffff) { 2853 if (pkt_dev->svlan_id != 0xffff) { 2854 svlan_tci = skb_put(skb, sizeof(__be16)); 2855 *svlan_tci = build_tci(pkt_dev->svlan_id, 2856 pkt_dev->svlan_cfi, 2857 pkt_dev->svlan_p); 2858 svlan_encapsulated_proto = skb_put(skb, 2859 sizeof(__be16)); 2860 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2861 } 2862 vlan_tci = skb_put(skb, sizeof(__be16)); 2863 *vlan_tci = build_tci(pkt_dev->vlan_id, 2864 pkt_dev->vlan_cfi, 2865 pkt_dev->vlan_p); 2866 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); 2867 *vlan_encapsulated_proto = htons(ETH_P_IP); 2868 } 2869 2870 skb_reset_mac_header(skb); 2871 skb_set_network_header(skb, skb->len); 2872 iph = skb_put(skb, sizeof(struct iphdr)); 2873 2874 skb_set_transport_header(skb, skb->len); 2875 udph = skb_put(skb, sizeof(struct udphdr)); 2876 skb_set_queue_mapping(skb, queue_map); 2877 skb->priority = pkt_dev->skb_priority; 2878 2879 memcpy(eth, pkt_dev->hh, 12); 2880 *(__be16 *) & eth[12] = protocol; 2881 2882 /* Eth + IPh + UDPh + mpls */ 2883 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2884 pkt_dev->pkt_overhead; 2885 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2886 datalen = sizeof(struct pktgen_hdr); 2887 2888 udph->source = htons(pkt_dev->cur_udp_src); 2889 udph->dest = htons(pkt_dev->cur_udp_dst); 2890 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2891 udph->check = 0; 2892 2893 iph->ihl = 5; 2894 iph->version = 4; 2895 iph->ttl = 32; 2896 iph->tos = pkt_dev->tos; 2897 iph->protocol = IPPROTO_UDP; /* UDP */ 2898 iph->saddr = pkt_dev->cur_saddr; 2899 iph->daddr = pkt_dev->cur_daddr; 2900 iph->id = htons(pkt_dev->ip_id); 2901 pkt_dev->ip_id++; 2902 iph->frag_off = 0; 2903 iplen = 20 + 8 + datalen; 2904 iph->tot_len = htons(iplen); 2905 ip_send_check(iph); 2906 skb->protocol = protocol; 2907 skb->dev = odev; 2908 skb->pkt_type = PACKET_HOST; 2909 2910 pktgen_finalize_skb(pkt_dev, skb, datalen); 2911 2912 if (!(pkt_dev->flags & F_UDPCSUM)) { 2913 skb->ip_summed = CHECKSUM_NONE; 2914 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) { 2915 skb->ip_summed = CHECKSUM_PARTIAL; 2916 skb->csum = 0; 2917 udp4_hwcsum(skb, iph->saddr, iph->daddr); 2918 } else { 2919 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); 2920 2921 /* add protocol-dependent pseudo-header */ 2922 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, 2923 datalen + 8, IPPROTO_UDP, csum); 2924 2925 if (udph->check == 0) 2926 udph->check = CSUM_MANGLED_0; 2927 } 2928 2929 #ifdef CONFIG_XFRM 2930 if (!process_ipsec(pkt_dev, skb, protocol)) 2931 return NULL; 2932 #endif 2933 2934 return skb; 2935 } 2936 2937 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2938 struct pktgen_dev *pkt_dev) 2939 { 2940 struct sk_buff *skb = NULL; 2941 __u8 *eth; 2942 struct udphdr *udph; 2943 int datalen, udplen; 2944 struct ipv6hdr *iph; 2945 __be16 protocol = htons(ETH_P_IPV6); 2946 __be32 *mpls; 2947 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2948 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2949 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2950 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2951 u16 queue_map; 2952 2953 if (pkt_dev->nr_labels) 2954 protocol = htons(ETH_P_MPLS_UC); 2955 2956 if (pkt_dev->vlan_id != 0xffff) 2957 protocol = htons(ETH_P_8021Q); 2958 2959 /* Update any of the values, used when we're incrementing various 2960 * fields. 2961 */ 2962 mod_cur_headers(pkt_dev); 2963 queue_map = pkt_dev->cur_queue_map; 2964 2965 skb = pktgen_alloc_skb(odev, pkt_dev); 2966 if (!skb) { 2967 sprintf(pkt_dev->result, "No memory"); 2968 return NULL; 2969 } 2970 2971 prefetchw(skb->data); 2972 skb_reserve(skb, 16); 2973 2974 /* Reserve for ethernet and IP header */ 2975 eth = skb_push(skb, 14); 2976 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); 2977 if (pkt_dev->nr_labels) 2978 mpls_push(mpls, pkt_dev); 2979 2980 if (pkt_dev->vlan_id != 0xffff) { 2981 if (pkt_dev->svlan_id != 0xffff) { 2982 svlan_tci = skb_put(skb, sizeof(__be16)); 2983 *svlan_tci = build_tci(pkt_dev->svlan_id, 2984 pkt_dev->svlan_cfi, 2985 pkt_dev->svlan_p); 2986 svlan_encapsulated_proto = skb_put(skb, 2987 sizeof(__be16)); 2988 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2989 } 2990 vlan_tci = skb_put(skb, sizeof(__be16)); 2991 *vlan_tci = build_tci(pkt_dev->vlan_id, 2992 pkt_dev->vlan_cfi, 2993 pkt_dev->vlan_p); 2994 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); 2995 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2996 } 2997 2998 skb_reset_mac_header(skb); 2999 skb_set_network_header(skb, skb->len); 3000 iph = skb_put(skb, sizeof(struct ipv6hdr)); 3001 3002 skb_set_transport_header(skb, skb->len); 3003 udph = skb_put(skb, sizeof(struct udphdr)); 3004 skb_set_queue_mapping(skb, queue_map); 3005 skb->priority = pkt_dev->skb_priority; 3006 3007 memcpy(eth, pkt_dev->hh, 12); 3008 *(__be16 *) ð[12] = protocol; 3009 3010 /* Eth + IPh + UDPh + mpls */ 3011 datalen = pkt_dev->cur_pkt_size - 14 - 3012 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 3013 pkt_dev->pkt_overhead; 3014 3015 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 3016 datalen = sizeof(struct pktgen_hdr); 3017 net_info_ratelimited("increased datalen to %d\n", datalen); 3018 } 3019 3020 udplen = datalen + sizeof(struct udphdr); 3021 udph->source = htons(pkt_dev->cur_udp_src); 3022 udph->dest = htons(pkt_dev->cur_udp_dst); 3023 udph->len = htons(udplen); 3024 udph->check = 0; 3025 3026 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3027 3028 if (pkt_dev->traffic_class) { 3029 /* Version + traffic class + flow (0) */ 3030 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3031 } 3032 3033 iph->hop_limit = 32; 3034 3035 iph->payload_len = htons(udplen); 3036 iph->nexthdr = IPPROTO_UDP; 3037 3038 iph->daddr = pkt_dev->cur_in6_daddr; 3039 iph->saddr = pkt_dev->cur_in6_saddr; 3040 3041 skb->protocol = protocol; 3042 skb->dev = odev; 3043 skb->pkt_type = PACKET_HOST; 3044 3045 pktgen_finalize_skb(pkt_dev, skb, datalen); 3046 3047 if (!(pkt_dev->flags & F_UDPCSUM)) { 3048 skb->ip_summed = CHECKSUM_NONE; 3049 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) { 3050 skb->ip_summed = CHECKSUM_PARTIAL; 3051 skb->csum_start = skb_transport_header(skb) - skb->head; 3052 skb->csum_offset = offsetof(struct udphdr, check); 3053 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 3054 } else { 3055 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); 3056 3057 /* add protocol-dependent pseudo-header */ 3058 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 3059 3060 if (udph->check == 0) 3061 udph->check = CSUM_MANGLED_0; 3062 } 3063 3064 return skb; 3065 } 3066 3067 static struct sk_buff *fill_packet(struct net_device *odev, 3068 struct pktgen_dev *pkt_dev) 3069 { 3070 if (pkt_dev->flags & F_IPV6) 3071 return fill_packet_ipv6(odev, pkt_dev); 3072 else 3073 return fill_packet_ipv4(odev, pkt_dev); 3074 } 3075 3076 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3077 { 3078 pkt_dev->seq_num = 1; 3079 pkt_dev->idle_acc = 0; 3080 pkt_dev->sofar = 0; 3081 pkt_dev->tx_bytes = 0; 3082 pkt_dev->errors = 0; 3083 } 3084 3085 /* Set up structure for sending pkts, clear counters */ 3086 3087 static void pktgen_run(struct pktgen_thread *t) 3088 { 3089 struct pktgen_dev *pkt_dev; 3090 int started = 0; 3091 3092 func_enter(); 3093 3094 rcu_read_lock(); 3095 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3096 3097 /* 3098 * setup odev and create initial packet. 3099 */ 3100 pktgen_setup_inject(pkt_dev); 3101 3102 if (pkt_dev->odev) { 3103 pktgen_clear_counters(pkt_dev); 3104 pkt_dev->skb = NULL; 3105 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3106 3107 set_pkt_overhead(pkt_dev); 3108 3109 strcpy(pkt_dev->result, "Starting"); 3110 pkt_dev->running = 1; /* Cranke yeself! */ 3111 started++; 3112 } else 3113 strcpy(pkt_dev->result, "Error starting"); 3114 } 3115 rcu_read_unlock(); 3116 if (started) 3117 t->control &= ~(T_STOP); 3118 } 3119 3120 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 3121 { 3122 struct pktgen_thread *t; 3123 3124 func_enter(); 3125 3126 mutex_lock(&pktgen_thread_lock); 3127 3128 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3129 t->control |= T_STOP; 3130 3131 mutex_unlock(&pktgen_thread_lock); 3132 } 3133 3134 static int thread_is_running(const struct pktgen_thread *t) 3135 { 3136 const struct pktgen_dev *pkt_dev; 3137 3138 rcu_read_lock(); 3139 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 3140 if (pkt_dev->running) { 3141 rcu_read_unlock(); 3142 return 1; 3143 } 3144 rcu_read_unlock(); 3145 return 0; 3146 } 3147 3148 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3149 { 3150 while (thread_is_running(t)) { 3151 3152 msleep_interruptible(100); 3153 3154 if (signal_pending(current)) 3155 goto signal; 3156 } 3157 return 1; 3158 signal: 3159 return 0; 3160 } 3161 3162 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3163 { 3164 struct pktgen_thread *t; 3165 int sig = 1; 3166 3167 mutex_lock(&pktgen_thread_lock); 3168 3169 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3170 sig = pktgen_wait_thread_run(t); 3171 if (sig == 0) 3172 break; 3173 } 3174 3175 if (sig == 0) 3176 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3177 t->control |= (T_STOP); 3178 3179 mutex_unlock(&pktgen_thread_lock); 3180 return sig; 3181 } 3182 3183 static void pktgen_run_all_threads(struct pktgen_net *pn) 3184 { 3185 struct pktgen_thread *t; 3186 3187 func_enter(); 3188 3189 mutex_lock(&pktgen_thread_lock); 3190 3191 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3192 t->control |= (T_RUN); 3193 3194 mutex_unlock(&pktgen_thread_lock); 3195 3196 /* Propagate thread->control */ 3197 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3198 3199 pktgen_wait_all_threads_run(pn); 3200 } 3201 3202 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3203 { 3204 struct pktgen_thread *t; 3205 3206 func_enter(); 3207 3208 mutex_lock(&pktgen_thread_lock); 3209 3210 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3211 t->control |= (T_REMDEVALL); 3212 3213 mutex_unlock(&pktgen_thread_lock); 3214 3215 /* Propagate thread->control */ 3216 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3217 3218 pktgen_wait_all_threads_run(pn); 3219 } 3220 3221 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3222 { 3223 __u64 bps, mbps, pps; 3224 char *p = pkt_dev->result; 3225 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3226 pkt_dev->started_at); 3227 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3228 3229 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3230 (unsigned long long)ktime_to_us(elapsed), 3231 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3232 (unsigned long long)ktime_to_us(idle), 3233 (unsigned long long)pkt_dev->sofar, 3234 pkt_dev->cur_pkt_size, nr_frags); 3235 3236 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3237 ktime_to_ns(elapsed)); 3238 3239 bps = pps * 8 * pkt_dev->cur_pkt_size; 3240 3241 mbps = bps; 3242 do_div(mbps, 1000000); 3243 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3244 (unsigned long long)pps, 3245 (unsigned long long)mbps, 3246 (unsigned long long)bps, 3247 (unsigned long long)pkt_dev->errors); 3248 } 3249 3250 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3251 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3252 { 3253 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3254 3255 if (!pkt_dev->running) { 3256 pr_warn("interface: %s is already stopped\n", 3257 pkt_dev->odevname); 3258 return -EINVAL; 3259 } 3260 3261 pkt_dev->running = 0; 3262 kfree_skb(pkt_dev->skb); 3263 pkt_dev->skb = NULL; 3264 pkt_dev->stopped_at = ktime_get(); 3265 3266 show_results(pkt_dev, nr_frags); 3267 3268 return 0; 3269 } 3270 3271 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3272 { 3273 struct pktgen_dev *pkt_dev, *best = NULL; 3274 3275 rcu_read_lock(); 3276 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3277 if (!pkt_dev->running) 3278 continue; 3279 if (best == NULL) 3280 best = pkt_dev; 3281 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3282 best = pkt_dev; 3283 } 3284 rcu_read_unlock(); 3285 3286 return best; 3287 } 3288 3289 static void pktgen_stop(struct pktgen_thread *t) 3290 { 3291 struct pktgen_dev *pkt_dev; 3292 3293 func_enter(); 3294 3295 rcu_read_lock(); 3296 3297 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3298 pktgen_stop_device(pkt_dev); 3299 } 3300 3301 rcu_read_unlock(); 3302 } 3303 3304 /* 3305 * one of our devices needs to be removed - find it 3306 * and remove it 3307 */ 3308 static void pktgen_rem_one_if(struct pktgen_thread *t) 3309 { 3310 struct list_head *q, *n; 3311 struct pktgen_dev *cur; 3312 3313 func_enter(); 3314 3315 list_for_each_safe(q, n, &t->if_list) { 3316 cur = list_entry(q, struct pktgen_dev, list); 3317 3318 if (!cur->removal_mark) 3319 continue; 3320 3321 kfree_skb(cur->skb); 3322 cur->skb = NULL; 3323 3324 pktgen_remove_device(t, cur); 3325 3326 break; 3327 } 3328 } 3329 3330 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3331 { 3332 struct list_head *q, *n; 3333 struct pktgen_dev *cur; 3334 3335 func_enter(); 3336 3337 /* Remove all devices, free mem */ 3338 3339 list_for_each_safe(q, n, &t->if_list) { 3340 cur = list_entry(q, struct pktgen_dev, list); 3341 3342 kfree_skb(cur->skb); 3343 cur->skb = NULL; 3344 3345 pktgen_remove_device(t, cur); 3346 } 3347 } 3348 3349 static void pktgen_rem_thread(struct pktgen_thread *t) 3350 { 3351 /* Remove from the thread list */ 3352 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3353 } 3354 3355 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3356 { 3357 ktime_t idle_start = ktime_get(); 3358 schedule(); 3359 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3360 } 3361 3362 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3363 { 3364 ktime_t idle_start = ktime_get(); 3365 3366 while (refcount_read(&(pkt_dev->skb->users)) != 1) { 3367 if (signal_pending(current)) 3368 break; 3369 3370 if (need_resched()) 3371 pktgen_resched(pkt_dev); 3372 else 3373 cpu_relax(); 3374 } 3375 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3376 } 3377 3378 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3379 { 3380 unsigned int burst = ACCESS_ONCE(pkt_dev->burst); 3381 struct net_device *odev = pkt_dev->odev; 3382 struct netdev_queue *txq; 3383 struct sk_buff *skb; 3384 int ret; 3385 3386 /* If device is offline, then don't send */ 3387 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3388 pktgen_stop_device(pkt_dev); 3389 return; 3390 } 3391 3392 /* This is max DELAY, this has special meaning of 3393 * "never transmit" 3394 */ 3395 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3396 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3397 return; 3398 } 3399 3400 /* If no skb or clone count exhausted then get new one */ 3401 if (!pkt_dev->skb || (pkt_dev->last_ok && 3402 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3403 /* build a new pkt */ 3404 kfree_skb(pkt_dev->skb); 3405 3406 pkt_dev->skb = fill_packet(odev, pkt_dev); 3407 if (pkt_dev->skb == NULL) { 3408 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3409 schedule(); 3410 pkt_dev->clone_count--; /* back out increment, OOM */ 3411 return; 3412 } 3413 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3414 pkt_dev->clone_count = 0; /* reset counter */ 3415 } 3416 3417 if (pkt_dev->delay && pkt_dev->last_ok) 3418 spin(pkt_dev, pkt_dev->next_tx); 3419 3420 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) { 3421 skb = pkt_dev->skb; 3422 skb->protocol = eth_type_trans(skb, skb->dev); 3423 refcount_add(burst, &skb->users); 3424 local_bh_disable(); 3425 do { 3426 ret = netif_receive_skb(skb); 3427 if (ret == NET_RX_DROP) 3428 pkt_dev->errors++; 3429 pkt_dev->sofar++; 3430 pkt_dev->seq_num++; 3431 if (refcount_read(&skb->users) != burst) { 3432 /* skb was queued by rps/rfs or taps, 3433 * so cannot reuse this skb 3434 */ 3435 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users)); 3436 /* get out of the loop and wait 3437 * until skb is consumed 3438 */ 3439 break; 3440 } 3441 /* skb was 'freed' by stack, so clean few 3442 * bits and reuse it 3443 */ 3444 skb_reset_tc(skb); 3445 } while (--burst > 0); 3446 goto out; /* Skips xmit_mode M_START_XMIT */ 3447 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) { 3448 local_bh_disable(); 3449 refcount_inc(&pkt_dev->skb->users); 3450 3451 ret = dev_queue_xmit(pkt_dev->skb); 3452 switch (ret) { 3453 case NET_XMIT_SUCCESS: 3454 pkt_dev->sofar++; 3455 pkt_dev->seq_num++; 3456 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3457 break; 3458 case NET_XMIT_DROP: 3459 case NET_XMIT_CN: 3460 /* These are all valid return codes for a qdisc but 3461 * indicate packets are being dropped or will likely 3462 * be dropped soon. 3463 */ 3464 case NETDEV_TX_BUSY: 3465 /* qdisc may call dev_hard_start_xmit directly in cases 3466 * where no queues exist e.g. loopback device, virtual 3467 * devices, etc. In this case we need to handle 3468 * NETDEV_TX_ codes. 3469 */ 3470 default: 3471 pkt_dev->errors++; 3472 net_info_ratelimited("%s xmit error: %d\n", 3473 pkt_dev->odevname, ret); 3474 break; 3475 } 3476 goto out; 3477 } 3478 3479 txq = skb_get_tx_queue(odev, pkt_dev->skb); 3480 3481 local_bh_disable(); 3482 3483 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3484 3485 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3486 ret = NETDEV_TX_BUSY; 3487 pkt_dev->last_ok = 0; 3488 goto unlock; 3489 } 3490 refcount_add(burst, &pkt_dev->skb->users); 3491 3492 xmit_more: 3493 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); 3494 3495 switch (ret) { 3496 case NETDEV_TX_OK: 3497 pkt_dev->last_ok = 1; 3498 pkt_dev->sofar++; 3499 pkt_dev->seq_num++; 3500 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3501 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) 3502 goto xmit_more; 3503 break; 3504 case NET_XMIT_DROP: 3505 case NET_XMIT_CN: 3506 /* skb has been consumed */ 3507 pkt_dev->errors++; 3508 break; 3509 default: /* Drivers are not supposed to return other values! */ 3510 net_info_ratelimited("%s xmit error: %d\n", 3511 pkt_dev->odevname, ret); 3512 pkt_dev->errors++; 3513 /* fallthru */ 3514 case NETDEV_TX_BUSY: 3515 /* Retry it next time */ 3516 refcount_dec(&(pkt_dev->skb->users)); 3517 pkt_dev->last_ok = 0; 3518 } 3519 if (unlikely(burst)) 3520 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users)); 3521 unlock: 3522 HARD_TX_UNLOCK(odev, txq); 3523 3524 out: 3525 local_bh_enable(); 3526 3527 /* If pkt_dev->count is zero, then run forever */ 3528 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3529 pktgen_wait_for_skb(pkt_dev); 3530 3531 /* Done with this */ 3532 pktgen_stop_device(pkt_dev); 3533 } 3534 } 3535 3536 /* 3537 * Main loop of the thread goes here 3538 */ 3539 3540 static int pktgen_thread_worker(void *arg) 3541 { 3542 DEFINE_WAIT(wait); 3543 struct pktgen_thread *t = arg; 3544 struct pktgen_dev *pkt_dev = NULL; 3545 int cpu = t->cpu; 3546 3547 BUG_ON(smp_processor_id() != cpu); 3548 3549 init_waitqueue_head(&t->queue); 3550 complete(&t->start_done); 3551 3552 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3553 3554 set_freezable(); 3555 3556 while (!kthread_should_stop()) { 3557 pkt_dev = next_to_run(t); 3558 3559 if (unlikely(!pkt_dev && t->control == 0)) { 3560 if (t->net->pktgen_exiting) 3561 break; 3562 wait_event_interruptible_timeout(t->queue, 3563 t->control != 0, 3564 HZ/10); 3565 try_to_freeze(); 3566 continue; 3567 } 3568 3569 if (likely(pkt_dev)) { 3570 pktgen_xmit(pkt_dev); 3571 3572 if (need_resched()) 3573 pktgen_resched(pkt_dev); 3574 else 3575 cpu_relax(); 3576 } 3577 3578 if (t->control & T_STOP) { 3579 pktgen_stop(t); 3580 t->control &= ~(T_STOP); 3581 } 3582 3583 if (t->control & T_RUN) { 3584 pktgen_run(t); 3585 t->control &= ~(T_RUN); 3586 } 3587 3588 if (t->control & T_REMDEVALL) { 3589 pktgen_rem_all_ifs(t); 3590 t->control &= ~(T_REMDEVALL); 3591 } 3592 3593 if (t->control & T_REMDEV) { 3594 pktgen_rem_one_if(t); 3595 t->control &= ~(T_REMDEV); 3596 } 3597 3598 try_to_freeze(); 3599 } 3600 3601 pr_debug("%s stopping all device\n", t->tsk->comm); 3602 pktgen_stop(t); 3603 3604 pr_debug("%s removing all device\n", t->tsk->comm); 3605 pktgen_rem_all_ifs(t); 3606 3607 pr_debug("%s removing thread\n", t->tsk->comm); 3608 pktgen_rem_thread(t); 3609 3610 return 0; 3611 } 3612 3613 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3614 const char *ifname, bool exact) 3615 { 3616 struct pktgen_dev *p, *pkt_dev = NULL; 3617 size_t len = strlen(ifname); 3618 3619 rcu_read_lock(); 3620 list_for_each_entry_rcu(p, &t->if_list, list) 3621 if (strncmp(p->odevname, ifname, len) == 0) { 3622 if (p->odevname[len]) { 3623 if (exact || p->odevname[len] != '@') 3624 continue; 3625 } 3626 pkt_dev = p; 3627 break; 3628 } 3629 3630 rcu_read_unlock(); 3631 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3632 return pkt_dev; 3633 } 3634 3635 /* 3636 * Adds a dev at front of if_list. 3637 */ 3638 3639 static int add_dev_to_thread(struct pktgen_thread *t, 3640 struct pktgen_dev *pkt_dev) 3641 { 3642 int rv = 0; 3643 3644 /* This function cannot be called concurrently, as its called 3645 * under pktgen_thread_lock mutex, but it can run from 3646 * userspace on another CPU than the kthread. The if_lock() 3647 * is used here to sync with concurrent instances of 3648 * _rem_dev_from_if_list() invoked via kthread, which is also 3649 * updating the if_list */ 3650 if_lock(t); 3651 3652 if (pkt_dev->pg_thread) { 3653 pr_err("ERROR: already assigned to a thread\n"); 3654 rv = -EBUSY; 3655 goto out; 3656 } 3657 3658 pkt_dev->running = 0; 3659 pkt_dev->pg_thread = t; 3660 list_add_rcu(&pkt_dev->list, &t->if_list); 3661 3662 out: 3663 if_unlock(t); 3664 return rv; 3665 } 3666 3667 /* Called under thread lock */ 3668 3669 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3670 { 3671 struct pktgen_dev *pkt_dev; 3672 int err; 3673 int node = cpu_to_node(t->cpu); 3674 3675 /* We don't allow a device to be on several threads */ 3676 3677 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3678 if (pkt_dev) { 3679 pr_err("ERROR: interface already used\n"); 3680 return -EBUSY; 3681 } 3682 3683 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3684 if (!pkt_dev) 3685 return -ENOMEM; 3686 3687 strcpy(pkt_dev->odevname, ifname); 3688 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3689 node); 3690 if (pkt_dev->flows == NULL) { 3691 kfree(pkt_dev); 3692 return -ENOMEM; 3693 } 3694 3695 pkt_dev->removal_mark = 0; 3696 pkt_dev->nfrags = 0; 3697 pkt_dev->delay = pg_delay_d; 3698 pkt_dev->count = pg_count_d; 3699 pkt_dev->sofar = 0; 3700 pkt_dev->udp_src_min = 9; /* sink port */ 3701 pkt_dev->udp_src_max = 9; 3702 pkt_dev->udp_dst_min = 9; 3703 pkt_dev->udp_dst_max = 9; 3704 pkt_dev->vlan_p = 0; 3705 pkt_dev->vlan_cfi = 0; 3706 pkt_dev->vlan_id = 0xffff; 3707 pkt_dev->svlan_p = 0; 3708 pkt_dev->svlan_cfi = 0; 3709 pkt_dev->svlan_id = 0xffff; 3710 pkt_dev->burst = 1; 3711 pkt_dev->node = -1; 3712 3713 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3714 if (err) 3715 goto out1; 3716 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3717 pkt_dev->clone_skb = pg_clone_skb_d; 3718 3719 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3720 &pktgen_if_fops, pkt_dev); 3721 if (!pkt_dev->entry) { 3722 pr_err("cannot create %s/%s procfs entry\n", 3723 PG_PROC_DIR, ifname); 3724 err = -EINVAL; 3725 goto out2; 3726 } 3727 #ifdef CONFIG_XFRM 3728 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3729 pkt_dev->ipsproto = IPPROTO_ESP; 3730 3731 /* xfrm tunnel mode needs additional dst to extract outter 3732 * ip header protocol/ttl/id field, here creat a phony one. 3733 * instead of looking for a valid rt, which definitely hurting 3734 * performance under such circumstance. 3735 */ 3736 pkt_dev->dstops.family = AF_INET; 3737 pkt_dev->dst.dev = pkt_dev->odev; 3738 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); 3739 pkt_dev->dst.child = &pkt_dev->dst; 3740 pkt_dev->dst.ops = &pkt_dev->dstops; 3741 #endif 3742 3743 return add_dev_to_thread(t, pkt_dev); 3744 out2: 3745 dev_put(pkt_dev->odev); 3746 out1: 3747 #ifdef CONFIG_XFRM 3748 free_SAs(pkt_dev); 3749 #endif 3750 vfree(pkt_dev->flows); 3751 kfree(pkt_dev); 3752 return err; 3753 } 3754 3755 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3756 { 3757 struct pktgen_thread *t; 3758 struct proc_dir_entry *pe; 3759 struct task_struct *p; 3760 3761 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3762 cpu_to_node(cpu)); 3763 if (!t) { 3764 pr_err("ERROR: out of memory, can't create new thread\n"); 3765 return -ENOMEM; 3766 } 3767 3768 mutex_init(&t->if_lock); 3769 t->cpu = cpu; 3770 3771 INIT_LIST_HEAD(&t->if_list); 3772 3773 list_add_tail(&t->th_list, &pn->pktgen_threads); 3774 init_completion(&t->start_done); 3775 3776 p = kthread_create_on_node(pktgen_thread_worker, 3777 t, 3778 cpu_to_node(cpu), 3779 "kpktgend_%d", cpu); 3780 if (IS_ERR(p)) { 3781 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3782 list_del(&t->th_list); 3783 kfree(t); 3784 return PTR_ERR(p); 3785 } 3786 kthread_bind(p, cpu); 3787 t->tsk = p; 3788 3789 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3790 &pktgen_thread_fops, t); 3791 if (!pe) { 3792 pr_err("cannot create %s/%s procfs entry\n", 3793 PG_PROC_DIR, t->tsk->comm); 3794 kthread_stop(p); 3795 list_del(&t->th_list); 3796 kfree(t); 3797 return -EINVAL; 3798 } 3799 3800 t->net = pn; 3801 get_task_struct(p); 3802 wake_up_process(p); 3803 wait_for_completion(&t->start_done); 3804 3805 return 0; 3806 } 3807 3808 /* 3809 * Removes a device from the thread if_list. 3810 */ 3811 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3812 struct pktgen_dev *pkt_dev) 3813 { 3814 struct list_head *q, *n; 3815 struct pktgen_dev *p; 3816 3817 if_lock(t); 3818 list_for_each_safe(q, n, &t->if_list) { 3819 p = list_entry(q, struct pktgen_dev, list); 3820 if (p == pkt_dev) 3821 list_del_rcu(&p->list); 3822 } 3823 if_unlock(t); 3824 } 3825 3826 static int pktgen_remove_device(struct pktgen_thread *t, 3827 struct pktgen_dev *pkt_dev) 3828 { 3829 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3830 3831 if (pkt_dev->running) { 3832 pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); 3833 pktgen_stop_device(pkt_dev); 3834 } 3835 3836 /* Dis-associate from the interface */ 3837 3838 if (pkt_dev->odev) { 3839 dev_put(pkt_dev->odev); 3840 pkt_dev->odev = NULL; 3841 } 3842 3843 /* Remove proc before if_list entry, because add_device uses 3844 * list to determine if interface already exist, avoid race 3845 * with proc_create_data() */ 3846 proc_remove(pkt_dev->entry); 3847 3848 /* And update the thread if_list */ 3849 _rem_dev_from_if_list(t, pkt_dev); 3850 3851 #ifdef CONFIG_XFRM 3852 free_SAs(pkt_dev); 3853 #endif 3854 vfree(pkt_dev->flows); 3855 if (pkt_dev->page) 3856 put_page(pkt_dev->page); 3857 kfree_rcu(pkt_dev, rcu); 3858 return 0; 3859 } 3860 3861 static int __net_init pg_net_init(struct net *net) 3862 { 3863 struct pktgen_net *pn = net_generic(net, pg_net_id); 3864 struct proc_dir_entry *pe; 3865 int cpu, ret = 0; 3866 3867 pn->net = net; 3868 INIT_LIST_HEAD(&pn->pktgen_threads); 3869 pn->pktgen_exiting = false; 3870 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3871 if (!pn->proc_dir) { 3872 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3873 return -ENODEV; 3874 } 3875 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3876 if (pe == NULL) { 3877 pr_err("cannot create %s procfs entry\n", PGCTRL); 3878 ret = -EINVAL; 3879 goto remove; 3880 } 3881 3882 for_each_online_cpu(cpu) { 3883 int err; 3884 3885 err = pktgen_create_thread(cpu, pn); 3886 if (err) 3887 pr_warn("Cannot create thread for cpu %d (%d)\n", 3888 cpu, err); 3889 } 3890 3891 if (list_empty(&pn->pktgen_threads)) { 3892 pr_err("Initialization failed for all threads\n"); 3893 ret = -ENODEV; 3894 goto remove_entry; 3895 } 3896 3897 return 0; 3898 3899 remove_entry: 3900 remove_proc_entry(PGCTRL, pn->proc_dir); 3901 remove: 3902 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3903 return ret; 3904 } 3905 3906 static void __net_exit pg_net_exit(struct net *net) 3907 { 3908 struct pktgen_net *pn = net_generic(net, pg_net_id); 3909 struct pktgen_thread *t; 3910 struct list_head *q, *n; 3911 LIST_HEAD(list); 3912 3913 /* Stop all interfaces & threads */ 3914 pn->pktgen_exiting = true; 3915 3916 mutex_lock(&pktgen_thread_lock); 3917 list_splice_init(&pn->pktgen_threads, &list); 3918 mutex_unlock(&pktgen_thread_lock); 3919 3920 list_for_each_safe(q, n, &list) { 3921 t = list_entry(q, struct pktgen_thread, th_list); 3922 list_del(&t->th_list); 3923 kthread_stop(t->tsk); 3924 put_task_struct(t->tsk); 3925 kfree(t); 3926 } 3927 3928 remove_proc_entry(PGCTRL, pn->proc_dir); 3929 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3930 } 3931 3932 static struct pernet_operations pg_net_ops = { 3933 .init = pg_net_init, 3934 .exit = pg_net_exit, 3935 .id = &pg_net_id, 3936 .size = sizeof(struct pktgen_net), 3937 }; 3938 3939 static int __init pg_init(void) 3940 { 3941 int ret = 0; 3942 3943 pr_info("%s", version); 3944 ret = register_pernet_subsys(&pg_net_ops); 3945 if (ret) 3946 return ret; 3947 ret = register_netdevice_notifier(&pktgen_notifier_block); 3948 if (ret) 3949 unregister_pernet_subsys(&pg_net_ops); 3950 3951 return ret; 3952 } 3953 3954 static void __exit pg_cleanup(void) 3955 { 3956 unregister_netdevice_notifier(&pktgen_notifier_block); 3957 unregister_pernet_subsys(&pg_net_ops); 3958 /* Don't need rcu_barrier() due to use of kfree_rcu() */ 3959 } 3960 3961 module_init(pg_init); 3962 module_exit(pg_cleanup); 3963 3964 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3965 MODULE_DESCRIPTION("Packet Generator tool"); 3966 MODULE_LICENSE("GPL"); 3967 MODULE_VERSION(VERSION); 3968 module_param(pg_count_d, int, 0); 3969 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3970 module_param(pg_delay_d, int, 0); 3971 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3972 module_param(pg_clone_skb_d, int, 0); 3973 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3974 module_param(debug, int, 0); 3975 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3976