1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 120 121 #include <linux/sys.h> 122 #include <linux/types.h> 123 #include <linux/module.h> 124 #include <linux/moduleparam.h> 125 #include <linux/kernel.h> 126 #include <linux/mutex.h> 127 #include <linux/sched.h> 128 #include <linux/slab.h> 129 #include <linux/vmalloc.h> 130 #include <linux/unistd.h> 131 #include <linux/string.h> 132 #include <linux/ptrace.h> 133 #include <linux/errno.h> 134 #include <linux/ioport.h> 135 #include <linux/interrupt.h> 136 #include <linux/capability.h> 137 #include <linux/hrtimer.h> 138 #include <linux/freezer.h> 139 #include <linux/delay.h> 140 #include <linux/timer.h> 141 #include <linux/list.h> 142 #include <linux/init.h> 143 #include <linux/skbuff.h> 144 #include <linux/netdevice.h> 145 #include <linux/inet.h> 146 #include <linux/inetdevice.h> 147 #include <linux/rtnetlink.h> 148 #include <linux/if_arp.h> 149 #include <linux/if_vlan.h> 150 #include <linux/in.h> 151 #include <linux/ip.h> 152 #include <linux/ipv6.h> 153 #include <linux/udp.h> 154 #include <linux/proc_fs.h> 155 #include <linux/seq_file.h> 156 #include <linux/wait.h> 157 #include <linux/etherdevice.h> 158 #include <linux/kthread.h> 159 #include <linux/prefetch.h> 160 #include <net/net_namespace.h> 161 #include <net/checksum.h> 162 #include <net/ipv6.h> 163 #include <net/udp.h> 164 #include <net/ip6_checksum.h> 165 #include <net/addrconf.h> 166 #ifdef CONFIG_XFRM 167 #include <net/xfrm.h> 168 #endif 169 #include <net/netns/generic.h> 170 #include <asm/byteorder.h> 171 #include <linux/rcupdate.h> 172 #include <linux/bitops.h> 173 #include <linux/io.h> 174 #include <linux/timex.h> 175 #include <linux/uaccess.h> 176 #include <asm/dma.h> 177 #include <asm/div64.h> /* do_div */ 178 179 #define VERSION "2.74" 180 #define IP_NAME_SZ 32 181 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 182 #define MPLS_STACK_BOTTOM htonl(0x00000100) 183 184 #define func_enter() pr_debug("entering %s\n", __func__); 185 186 /* Device flag bits */ 187 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 188 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 189 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 190 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 191 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 192 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 193 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 194 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 195 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 196 #define F_VID_RND (1<<9) /* Random VLAN ID */ 197 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 198 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 199 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 200 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 201 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 202 #define F_NODE (1<<15) /* Node memory alloc*/ 203 #define F_UDPCSUM (1<<16) /* Include UDP checksum */ 204 205 /* Thread control flag bits */ 206 #define T_STOP (1<<0) /* Stop run */ 207 #define T_RUN (1<<1) /* Start run */ 208 #define T_REMDEVALL (1<<2) /* Remove all devs */ 209 #define T_REMDEV (1<<3) /* Remove one dev */ 210 211 /* If lock -- can be removed after some work */ 212 #define if_lock(t) spin_lock(&(t->if_lock)); 213 #define if_unlock(t) spin_unlock(&(t->if_lock)); 214 215 /* Used to help with determining the pkts on receive */ 216 #define PKTGEN_MAGIC 0xbe9be955 217 #define PG_PROC_DIR "pktgen" 218 #define PGCTRL "pgctrl" 219 220 #define MAX_CFLOWS 65536 221 222 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 223 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 224 225 struct flow_state { 226 __be32 cur_daddr; 227 int count; 228 #ifdef CONFIG_XFRM 229 struct xfrm_state *x; 230 #endif 231 __u32 flags; 232 }; 233 234 /* flow flag bits */ 235 #define F_INIT (1<<0) /* flow has been initialized */ 236 237 struct pktgen_dev { 238 /* 239 * Try to keep frequent/infrequent used vars. separated. 240 */ 241 struct proc_dir_entry *entry; /* proc file */ 242 struct pktgen_thread *pg_thread;/* the owner */ 243 struct list_head list; /* chaining in the thread's run-queue */ 244 245 int running; /* if false, the test will stop */ 246 247 /* If min != max, then we will either do a linear iteration, or 248 * we will do a random selection from within the range. 249 */ 250 __u32 flags; 251 int removal_mark; /* non-zero => the device is marked for 252 * removal by worker thread */ 253 254 int min_pkt_size; 255 int max_pkt_size; 256 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 257 int nfrags; 258 struct page *page; 259 u64 delay; /* nano-seconds */ 260 261 __u64 count; /* Default No packets to send */ 262 __u64 sofar; /* How many pkts we've sent so far */ 263 __u64 tx_bytes; /* How many bytes we've transmitted */ 264 __u64 errors; /* Errors when trying to transmit, */ 265 266 /* runtime counters relating to clone_skb */ 267 268 __u64 allocated_skbs; 269 __u32 clone_count; 270 int last_ok; /* Was last skb sent? 271 * Or a failed transmit of some sort? 272 * This will keep sequence numbers in order 273 */ 274 ktime_t next_tx; 275 ktime_t started_at; 276 ktime_t stopped_at; 277 u64 idle_acc; /* nano-seconds */ 278 279 __u32 seq_num; 280 281 int clone_skb; /* 282 * Use multiple SKBs during packet gen. 283 * If this number is greater than 1, then 284 * that many copies of the same packet will be 285 * sent before a new packet is allocated. 286 * If you want to send 1024 identical packets 287 * before creating a new packet, 288 * set clone_skb to 1024. 289 */ 290 291 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 292 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 293 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 294 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 295 296 struct in6_addr in6_saddr; 297 struct in6_addr in6_daddr; 298 struct in6_addr cur_in6_daddr; 299 struct in6_addr cur_in6_saddr; 300 /* For ranges */ 301 struct in6_addr min_in6_daddr; 302 struct in6_addr max_in6_daddr; 303 struct in6_addr min_in6_saddr; 304 struct in6_addr max_in6_saddr; 305 306 /* If we're doing ranges, random or incremental, then this 307 * defines the min/max for those ranges. 308 */ 309 __be32 saddr_min; /* inclusive, source IP address */ 310 __be32 saddr_max; /* exclusive, source IP address */ 311 __be32 daddr_min; /* inclusive, dest IP address */ 312 __be32 daddr_max; /* exclusive, dest IP address */ 313 314 __u16 udp_src_min; /* inclusive, source UDP port */ 315 __u16 udp_src_max; /* exclusive, source UDP port */ 316 __u16 udp_dst_min; /* inclusive, dest UDP port */ 317 __u16 udp_dst_max; /* exclusive, dest UDP port */ 318 319 /* DSCP + ECN */ 320 __u8 tos; /* six MSB of (former) IPv4 TOS 321 are for dscp codepoint */ 322 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 323 (see RFC 3260, sec. 4) */ 324 325 /* MPLS */ 326 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 327 __be32 labels[MAX_MPLS_LABELS]; 328 329 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 330 __u8 vlan_p; 331 __u8 vlan_cfi; 332 __u16 vlan_id; /* 0xffff means no vlan tag */ 333 334 __u8 svlan_p; 335 __u8 svlan_cfi; 336 __u16 svlan_id; /* 0xffff means no svlan tag */ 337 338 __u32 src_mac_count; /* How many MACs to iterate through */ 339 __u32 dst_mac_count; /* How many MACs to iterate through */ 340 341 unsigned char dst_mac[ETH_ALEN]; 342 unsigned char src_mac[ETH_ALEN]; 343 344 __u32 cur_dst_mac_offset; 345 __u32 cur_src_mac_offset; 346 __be32 cur_saddr; 347 __be32 cur_daddr; 348 __u16 ip_id; 349 __u16 cur_udp_dst; 350 __u16 cur_udp_src; 351 __u16 cur_queue_map; 352 __u32 cur_pkt_size; 353 __u32 last_pkt_size; 354 355 __u8 hh[14]; 356 /* = { 357 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 358 359 We fill in SRC address later 360 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 361 0x08, 0x00 362 }; 363 */ 364 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 365 366 struct sk_buff *skb; /* skb we are to transmit next, used for when we 367 * are transmitting the same one multiple times 368 */ 369 struct net_device *odev; /* The out-going device. 370 * Note that the device should have it's 371 * pg_info pointer pointing back to this 372 * device. 373 * Set when the user specifies the out-going 374 * device name (not when the inject is 375 * started as it used to do.) 376 */ 377 char odevname[32]; 378 struct flow_state *flows; 379 unsigned int cflows; /* Concurrent flows (config) */ 380 unsigned int lflow; /* Flow length (config) */ 381 unsigned int nflows; /* accumulated flows (stats) */ 382 unsigned int curfl; /* current sequenced flow (state)*/ 383 384 u16 queue_map_min; 385 u16 queue_map_max; 386 __u32 skb_priority; /* skb priority field */ 387 int node; /* Memory node */ 388 389 #ifdef CONFIG_XFRM 390 __u8 ipsmode; /* IPSEC mode (config) */ 391 __u8 ipsproto; /* IPSEC type (config) */ 392 #endif 393 char result[512]; 394 }; 395 396 struct pktgen_hdr { 397 __be32 pgh_magic; 398 __be32 seq_num; 399 __be32 tv_sec; 400 __be32 tv_usec; 401 }; 402 403 404 static int pg_net_id __read_mostly; 405 406 struct pktgen_net { 407 struct net *net; 408 struct proc_dir_entry *proc_dir; 409 struct list_head pktgen_threads; 410 bool pktgen_exiting; 411 }; 412 413 struct pktgen_thread { 414 spinlock_t if_lock; /* for list of devices */ 415 struct list_head if_list; /* All device here */ 416 struct list_head th_list; 417 struct task_struct *tsk; 418 char result[512]; 419 420 /* Field for thread to receive "posted" events terminate, 421 stop ifs etc. */ 422 423 u32 control; 424 int cpu; 425 426 wait_queue_head_t queue; 427 struct completion start_done; 428 struct pktgen_net *net; 429 }; 430 431 #define REMOVE 1 432 #define FIND 0 433 434 static const char version[] = 435 "Packet Generator for packet performance testing. " 436 "Version: " VERSION "\n"; 437 438 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 439 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 440 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 441 const char *ifname, bool exact); 442 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 443 static void pktgen_run_all_threads(struct pktgen_net *pn); 444 static void pktgen_reset_all_threads(struct pktgen_net *pn); 445 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); 446 447 static void pktgen_stop(struct pktgen_thread *t); 448 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 449 450 /* Module parameters, defaults. */ 451 static int pg_count_d __read_mostly = 1000; 452 static int pg_delay_d __read_mostly; 453 static int pg_clone_skb_d __read_mostly; 454 static int debug __read_mostly; 455 456 static DEFINE_MUTEX(pktgen_thread_lock); 457 458 static struct notifier_block pktgen_notifier_block = { 459 .notifier_call = pktgen_device_event, 460 }; 461 462 /* 463 * /proc handling functions 464 * 465 */ 466 467 static int pgctrl_show(struct seq_file *seq, void *v) 468 { 469 seq_puts(seq, version); 470 return 0; 471 } 472 473 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 474 size_t count, loff_t *ppos) 475 { 476 int err = 0; 477 char data[128]; 478 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 479 480 if (!capable(CAP_NET_ADMIN)) { 481 err = -EPERM; 482 goto out; 483 } 484 485 if (count > sizeof(data)) 486 count = sizeof(data); 487 488 if (copy_from_user(data, buf, count)) { 489 err = -EFAULT; 490 goto out; 491 } 492 data[count - 1] = 0; /* Make string */ 493 494 if (!strcmp(data, "stop")) 495 pktgen_stop_all_threads_ifs(pn); 496 497 else if (!strcmp(data, "start")) 498 pktgen_run_all_threads(pn); 499 500 else if (!strcmp(data, "reset")) 501 pktgen_reset_all_threads(pn); 502 503 else 504 pr_warning("Unknown command: %s\n", data); 505 506 err = count; 507 508 out: 509 return err; 510 } 511 512 static int pgctrl_open(struct inode *inode, struct file *file) 513 { 514 return single_open(file, pgctrl_show, PDE_DATA(inode)); 515 } 516 517 static const struct file_operations pktgen_fops = { 518 .owner = THIS_MODULE, 519 .open = pgctrl_open, 520 .read = seq_read, 521 .llseek = seq_lseek, 522 .write = pgctrl_write, 523 .release = single_release, 524 }; 525 526 static int pktgen_if_show(struct seq_file *seq, void *v) 527 { 528 const struct pktgen_dev *pkt_dev = seq->private; 529 ktime_t stopped; 530 u64 idle; 531 532 seq_printf(seq, 533 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 534 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 535 pkt_dev->max_pkt_size); 536 537 seq_printf(seq, 538 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 539 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 540 pkt_dev->clone_skb, pkt_dev->odevname); 541 542 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 543 pkt_dev->lflow); 544 545 seq_printf(seq, 546 " queue_map_min: %u queue_map_max: %u\n", 547 pkt_dev->queue_map_min, 548 pkt_dev->queue_map_max); 549 550 if (pkt_dev->skb_priority) 551 seq_printf(seq, " skb_priority: %u\n", 552 pkt_dev->skb_priority); 553 554 if (pkt_dev->flags & F_IPV6) { 555 seq_printf(seq, 556 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 557 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 558 &pkt_dev->in6_saddr, 559 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 560 &pkt_dev->in6_daddr, 561 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 562 } else { 563 seq_printf(seq, 564 " dst_min: %s dst_max: %s\n", 565 pkt_dev->dst_min, pkt_dev->dst_max); 566 seq_printf(seq, 567 " src_min: %s src_max: %s\n", 568 pkt_dev->src_min, pkt_dev->src_max); 569 } 570 571 seq_puts(seq, " src_mac: "); 572 573 seq_printf(seq, "%pM ", 574 is_zero_ether_addr(pkt_dev->src_mac) ? 575 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 576 577 seq_printf(seq, "dst_mac: "); 578 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 579 580 seq_printf(seq, 581 " udp_src_min: %d udp_src_max: %d" 582 " udp_dst_min: %d udp_dst_max: %d\n", 583 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 584 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 585 586 seq_printf(seq, 587 " src_mac_count: %d dst_mac_count: %d\n", 588 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 589 590 if (pkt_dev->nr_labels) { 591 unsigned int i; 592 seq_printf(seq, " mpls: "); 593 for (i = 0; i < pkt_dev->nr_labels; i++) 594 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 595 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 596 } 597 598 if (pkt_dev->vlan_id != 0xffff) 599 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 600 pkt_dev->vlan_id, pkt_dev->vlan_p, 601 pkt_dev->vlan_cfi); 602 603 if (pkt_dev->svlan_id != 0xffff) 604 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 605 pkt_dev->svlan_id, pkt_dev->svlan_p, 606 pkt_dev->svlan_cfi); 607 608 if (pkt_dev->tos) 609 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 610 611 if (pkt_dev->traffic_class) 612 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 613 614 if (pkt_dev->node >= 0) 615 seq_printf(seq, " node: %d\n", pkt_dev->node); 616 617 seq_printf(seq, " Flags: "); 618 619 if (pkt_dev->flags & F_IPV6) 620 seq_printf(seq, "IPV6 "); 621 622 if (pkt_dev->flags & F_IPSRC_RND) 623 seq_printf(seq, "IPSRC_RND "); 624 625 if (pkt_dev->flags & F_IPDST_RND) 626 seq_printf(seq, "IPDST_RND "); 627 628 if (pkt_dev->flags & F_TXSIZE_RND) 629 seq_printf(seq, "TXSIZE_RND "); 630 631 if (pkt_dev->flags & F_UDPSRC_RND) 632 seq_printf(seq, "UDPSRC_RND "); 633 634 if (pkt_dev->flags & F_UDPDST_RND) 635 seq_printf(seq, "UDPDST_RND "); 636 637 if (pkt_dev->flags & F_UDPCSUM) 638 seq_printf(seq, "UDPCSUM "); 639 640 if (pkt_dev->flags & F_MPLS_RND) 641 seq_printf(seq, "MPLS_RND "); 642 643 if (pkt_dev->flags & F_QUEUE_MAP_RND) 644 seq_printf(seq, "QUEUE_MAP_RND "); 645 646 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 647 seq_printf(seq, "QUEUE_MAP_CPU "); 648 649 if (pkt_dev->cflows) { 650 if (pkt_dev->flags & F_FLOW_SEQ) 651 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 652 else 653 seq_printf(seq, "FLOW_RND "); 654 } 655 656 #ifdef CONFIG_XFRM 657 if (pkt_dev->flags & F_IPSEC_ON) 658 seq_printf(seq, "IPSEC "); 659 #endif 660 661 if (pkt_dev->flags & F_MACSRC_RND) 662 seq_printf(seq, "MACSRC_RND "); 663 664 if (pkt_dev->flags & F_MACDST_RND) 665 seq_printf(seq, "MACDST_RND "); 666 667 if (pkt_dev->flags & F_VID_RND) 668 seq_printf(seq, "VID_RND "); 669 670 if (pkt_dev->flags & F_SVID_RND) 671 seq_printf(seq, "SVID_RND "); 672 673 if (pkt_dev->flags & F_NODE) 674 seq_printf(seq, "NODE_ALLOC "); 675 676 seq_puts(seq, "\n"); 677 678 /* not really stopped, more like last-running-at */ 679 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 680 idle = pkt_dev->idle_acc; 681 do_div(idle, NSEC_PER_USEC); 682 683 seq_printf(seq, 684 "Current:\n pkts-sofar: %llu errors: %llu\n", 685 (unsigned long long)pkt_dev->sofar, 686 (unsigned long long)pkt_dev->errors); 687 688 seq_printf(seq, 689 " started: %lluus stopped: %lluus idle: %lluus\n", 690 (unsigned long long) ktime_to_us(pkt_dev->started_at), 691 (unsigned long long) ktime_to_us(stopped), 692 (unsigned long long) idle); 693 694 seq_printf(seq, 695 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 696 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 697 pkt_dev->cur_src_mac_offset); 698 699 if (pkt_dev->flags & F_IPV6) { 700 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 701 &pkt_dev->cur_in6_saddr, 702 &pkt_dev->cur_in6_daddr); 703 } else 704 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 705 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 706 707 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 708 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 709 710 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 711 712 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 713 714 if (pkt_dev->result[0]) 715 seq_printf(seq, "Result: %s\n", pkt_dev->result); 716 else 717 seq_printf(seq, "Result: Idle\n"); 718 719 return 0; 720 } 721 722 723 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 724 __u32 *num) 725 { 726 int i = 0; 727 *num = 0; 728 729 for (; i < maxlen; i++) { 730 int value; 731 char c; 732 *num <<= 4; 733 if (get_user(c, &user_buffer[i])) 734 return -EFAULT; 735 value = hex_to_bin(c); 736 if (value >= 0) 737 *num |= value; 738 else 739 break; 740 } 741 return i; 742 } 743 744 static int count_trail_chars(const char __user * user_buffer, 745 unsigned int maxlen) 746 { 747 int i; 748 749 for (i = 0; i < maxlen; i++) { 750 char c; 751 if (get_user(c, &user_buffer[i])) 752 return -EFAULT; 753 switch (c) { 754 case '\"': 755 case '\n': 756 case '\r': 757 case '\t': 758 case ' ': 759 case '=': 760 break; 761 default: 762 goto done; 763 } 764 } 765 done: 766 return i; 767 } 768 769 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 770 unsigned long *num) 771 { 772 int i; 773 *num = 0; 774 775 for (i = 0; i < maxlen; i++) { 776 char c; 777 if (get_user(c, &user_buffer[i])) 778 return -EFAULT; 779 if ((c >= '0') && (c <= '9')) { 780 *num *= 10; 781 *num += c - '0'; 782 } else 783 break; 784 } 785 return i; 786 } 787 788 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 789 { 790 int i; 791 792 for (i = 0; i < maxlen; i++) { 793 char c; 794 if (get_user(c, &user_buffer[i])) 795 return -EFAULT; 796 switch (c) { 797 case '\"': 798 case '\n': 799 case '\r': 800 case '\t': 801 case ' ': 802 goto done_str; 803 break; 804 default: 805 break; 806 } 807 } 808 done_str: 809 return i; 810 } 811 812 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 813 { 814 unsigned int n = 0; 815 char c; 816 ssize_t i = 0; 817 int len; 818 819 pkt_dev->nr_labels = 0; 820 do { 821 __u32 tmp; 822 len = hex32_arg(&buffer[i], 8, &tmp); 823 if (len <= 0) 824 return len; 825 pkt_dev->labels[n] = htonl(tmp); 826 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 827 pkt_dev->flags |= F_MPLS_RND; 828 i += len; 829 if (get_user(c, &buffer[i])) 830 return -EFAULT; 831 i++; 832 n++; 833 if (n >= MAX_MPLS_LABELS) 834 return -E2BIG; 835 } while (c == ','); 836 837 pkt_dev->nr_labels = n; 838 return i; 839 } 840 841 static ssize_t pktgen_if_write(struct file *file, 842 const char __user * user_buffer, size_t count, 843 loff_t * offset) 844 { 845 struct seq_file *seq = file->private_data; 846 struct pktgen_dev *pkt_dev = seq->private; 847 int i, max, len; 848 char name[16], valstr[32]; 849 unsigned long value = 0; 850 char *pg_result = NULL; 851 int tmp = 0; 852 char buf[128]; 853 854 pg_result = &(pkt_dev->result[0]); 855 856 if (count < 1) { 857 pr_warning("wrong command format\n"); 858 return -EINVAL; 859 } 860 861 max = count; 862 tmp = count_trail_chars(user_buffer, max); 863 if (tmp < 0) { 864 pr_warning("illegal format\n"); 865 return tmp; 866 } 867 i = tmp; 868 869 /* Read variable name */ 870 871 len = strn_len(&user_buffer[i], sizeof(name) - 1); 872 if (len < 0) 873 return len; 874 875 memset(name, 0, sizeof(name)); 876 if (copy_from_user(name, &user_buffer[i], len)) 877 return -EFAULT; 878 i += len; 879 880 max = count - i; 881 len = count_trail_chars(&user_buffer[i], max); 882 if (len < 0) 883 return len; 884 885 i += len; 886 887 if (debug) { 888 size_t copy = min_t(size_t, count, 1023); 889 char tb[copy + 1]; 890 if (copy_from_user(tb, user_buffer, copy)) 891 return -EFAULT; 892 tb[copy] = 0; 893 pr_debug("%s,%lu buffer -:%s:-\n", 894 name, (unsigned long)count, tb); 895 } 896 897 if (!strcmp(name, "min_pkt_size")) { 898 len = num_arg(&user_buffer[i], 10, &value); 899 if (len < 0) 900 return len; 901 902 i += len; 903 if (value < 14 + 20 + 8) 904 value = 14 + 20 + 8; 905 if (value != pkt_dev->min_pkt_size) { 906 pkt_dev->min_pkt_size = value; 907 pkt_dev->cur_pkt_size = value; 908 } 909 sprintf(pg_result, "OK: min_pkt_size=%u", 910 pkt_dev->min_pkt_size); 911 return count; 912 } 913 914 if (!strcmp(name, "max_pkt_size")) { 915 len = num_arg(&user_buffer[i], 10, &value); 916 if (len < 0) 917 return len; 918 919 i += len; 920 if (value < 14 + 20 + 8) 921 value = 14 + 20 + 8; 922 if (value != pkt_dev->max_pkt_size) { 923 pkt_dev->max_pkt_size = value; 924 pkt_dev->cur_pkt_size = value; 925 } 926 sprintf(pg_result, "OK: max_pkt_size=%u", 927 pkt_dev->max_pkt_size); 928 return count; 929 } 930 931 /* Shortcut for min = max */ 932 933 if (!strcmp(name, "pkt_size")) { 934 len = num_arg(&user_buffer[i], 10, &value); 935 if (len < 0) 936 return len; 937 938 i += len; 939 if (value < 14 + 20 + 8) 940 value = 14 + 20 + 8; 941 if (value != pkt_dev->min_pkt_size) { 942 pkt_dev->min_pkt_size = value; 943 pkt_dev->max_pkt_size = value; 944 pkt_dev->cur_pkt_size = value; 945 } 946 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 947 return count; 948 } 949 950 if (!strcmp(name, "debug")) { 951 len = num_arg(&user_buffer[i], 10, &value); 952 if (len < 0) 953 return len; 954 955 i += len; 956 debug = value; 957 sprintf(pg_result, "OK: debug=%u", debug); 958 return count; 959 } 960 961 if (!strcmp(name, "frags")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) 964 return len; 965 966 i += len; 967 pkt_dev->nfrags = value; 968 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 969 return count; 970 } 971 if (!strcmp(name, "delay")) { 972 len = num_arg(&user_buffer[i], 10, &value); 973 if (len < 0) 974 return len; 975 976 i += len; 977 if (value == 0x7FFFFFFF) 978 pkt_dev->delay = ULLONG_MAX; 979 else 980 pkt_dev->delay = (u64)value; 981 982 sprintf(pg_result, "OK: delay=%llu", 983 (unsigned long long) pkt_dev->delay); 984 return count; 985 } 986 if (!strcmp(name, "rate")) { 987 len = num_arg(&user_buffer[i], 10, &value); 988 if (len < 0) 989 return len; 990 991 i += len; 992 if (!value) 993 return len; 994 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 995 if (debug) 996 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 997 998 sprintf(pg_result, "OK: rate=%lu", value); 999 return count; 1000 } 1001 if (!strcmp(name, "ratep")) { 1002 len = num_arg(&user_buffer[i], 10, &value); 1003 if (len < 0) 1004 return len; 1005 1006 i += len; 1007 if (!value) 1008 return len; 1009 pkt_dev->delay = NSEC_PER_SEC/value; 1010 if (debug) 1011 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1012 1013 sprintf(pg_result, "OK: rate=%lu", value); 1014 return count; 1015 } 1016 if (!strcmp(name, "udp_src_min")) { 1017 len = num_arg(&user_buffer[i], 10, &value); 1018 if (len < 0) 1019 return len; 1020 1021 i += len; 1022 if (value != pkt_dev->udp_src_min) { 1023 pkt_dev->udp_src_min = value; 1024 pkt_dev->cur_udp_src = value; 1025 } 1026 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1027 return count; 1028 } 1029 if (!strcmp(name, "udp_dst_min")) { 1030 len = num_arg(&user_buffer[i], 10, &value); 1031 if (len < 0) 1032 return len; 1033 1034 i += len; 1035 if (value != pkt_dev->udp_dst_min) { 1036 pkt_dev->udp_dst_min = value; 1037 pkt_dev->cur_udp_dst = value; 1038 } 1039 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1040 return count; 1041 } 1042 if (!strcmp(name, "udp_src_max")) { 1043 len = num_arg(&user_buffer[i], 10, &value); 1044 if (len < 0) 1045 return len; 1046 1047 i += len; 1048 if (value != pkt_dev->udp_src_max) { 1049 pkt_dev->udp_src_max = value; 1050 pkt_dev->cur_udp_src = value; 1051 } 1052 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1053 return count; 1054 } 1055 if (!strcmp(name, "udp_dst_max")) { 1056 len = num_arg(&user_buffer[i], 10, &value); 1057 if (len < 0) 1058 return len; 1059 1060 i += len; 1061 if (value != pkt_dev->udp_dst_max) { 1062 pkt_dev->udp_dst_max = value; 1063 pkt_dev->cur_udp_dst = value; 1064 } 1065 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1066 return count; 1067 } 1068 if (!strcmp(name, "clone_skb")) { 1069 len = num_arg(&user_buffer[i], 10, &value); 1070 if (len < 0) 1071 return len; 1072 if ((value > 0) && 1073 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1074 return -ENOTSUPP; 1075 i += len; 1076 pkt_dev->clone_skb = value; 1077 1078 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1079 return count; 1080 } 1081 if (!strcmp(name, "count")) { 1082 len = num_arg(&user_buffer[i], 10, &value); 1083 if (len < 0) 1084 return len; 1085 1086 i += len; 1087 pkt_dev->count = value; 1088 sprintf(pg_result, "OK: count=%llu", 1089 (unsigned long long)pkt_dev->count); 1090 return count; 1091 } 1092 if (!strcmp(name, "src_mac_count")) { 1093 len = num_arg(&user_buffer[i], 10, &value); 1094 if (len < 0) 1095 return len; 1096 1097 i += len; 1098 if (pkt_dev->src_mac_count != value) { 1099 pkt_dev->src_mac_count = value; 1100 pkt_dev->cur_src_mac_offset = 0; 1101 } 1102 sprintf(pg_result, "OK: src_mac_count=%d", 1103 pkt_dev->src_mac_count); 1104 return count; 1105 } 1106 if (!strcmp(name, "dst_mac_count")) { 1107 len = num_arg(&user_buffer[i], 10, &value); 1108 if (len < 0) 1109 return len; 1110 1111 i += len; 1112 if (pkt_dev->dst_mac_count != value) { 1113 pkt_dev->dst_mac_count = value; 1114 pkt_dev->cur_dst_mac_offset = 0; 1115 } 1116 sprintf(pg_result, "OK: dst_mac_count=%d", 1117 pkt_dev->dst_mac_count); 1118 return count; 1119 } 1120 if (!strcmp(name, "node")) { 1121 len = num_arg(&user_buffer[i], 10, &value); 1122 if (len < 0) 1123 return len; 1124 1125 i += len; 1126 1127 if (node_possible(value)) { 1128 pkt_dev->node = value; 1129 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1130 if (pkt_dev->page) { 1131 put_page(pkt_dev->page); 1132 pkt_dev->page = NULL; 1133 } 1134 } 1135 else 1136 sprintf(pg_result, "ERROR: node not possible"); 1137 return count; 1138 } 1139 if (!strcmp(name, "flag")) { 1140 char f[32]; 1141 memset(f, 0, 32); 1142 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1143 if (len < 0) 1144 return len; 1145 1146 if (copy_from_user(f, &user_buffer[i], len)) 1147 return -EFAULT; 1148 i += len; 1149 if (strcmp(f, "IPSRC_RND") == 0) 1150 pkt_dev->flags |= F_IPSRC_RND; 1151 1152 else if (strcmp(f, "!IPSRC_RND") == 0) 1153 pkt_dev->flags &= ~F_IPSRC_RND; 1154 1155 else if (strcmp(f, "TXSIZE_RND") == 0) 1156 pkt_dev->flags |= F_TXSIZE_RND; 1157 1158 else if (strcmp(f, "!TXSIZE_RND") == 0) 1159 pkt_dev->flags &= ~F_TXSIZE_RND; 1160 1161 else if (strcmp(f, "IPDST_RND") == 0) 1162 pkt_dev->flags |= F_IPDST_RND; 1163 1164 else if (strcmp(f, "!IPDST_RND") == 0) 1165 pkt_dev->flags &= ~F_IPDST_RND; 1166 1167 else if (strcmp(f, "UDPSRC_RND") == 0) 1168 pkt_dev->flags |= F_UDPSRC_RND; 1169 1170 else if (strcmp(f, "!UDPSRC_RND") == 0) 1171 pkt_dev->flags &= ~F_UDPSRC_RND; 1172 1173 else if (strcmp(f, "UDPDST_RND") == 0) 1174 pkt_dev->flags |= F_UDPDST_RND; 1175 1176 else if (strcmp(f, "!UDPDST_RND") == 0) 1177 pkt_dev->flags &= ~F_UDPDST_RND; 1178 1179 else if (strcmp(f, "MACSRC_RND") == 0) 1180 pkt_dev->flags |= F_MACSRC_RND; 1181 1182 else if (strcmp(f, "!MACSRC_RND") == 0) 1183 pkt_dev->flags &= ~F_MACSRC_RND; 1184 1185 else if (strcmp(f, "MACDST_RND") == 0) 1186 pkt_dev->flags |= F_MACDST_RND; 1187 1188 else if (strcmp(f, "!MACDST_RND") == 0) 1189 pkt_dev->flags &= ~F_MACDST_RND; 1190 1191 else if (strcmp(f, "MPLS_RND") == 0) 1192 pkt_dev->flags |= F_MPLS_RND; 1193 1194 else if (strcmp(f, "!MPLS_RND") == 0) 1195 pkt_dev->flags &= ~F_MPLS_RND; 1196 1197 else if (strcmp(f, "VID_RND") == 0) 1198 pkt_dev->flags |= F_VID_RND; 1199 1200 else if (strcmp(f, "!VID_RND") == 0) 1201 pkt_dev->flags &= ~F_VID_RND; 1202 1203 else if (strcmp(f, "SVID_RND") == 0) 1204 pkt_dev->flags |= F_SVID_RND; 1205 1206 else if (strcmp(f, "!SVID_RND") == 0) 1207 pkt_dev->flags &= ~F_SVID_RND; 1208 1209 else if (strcmp(f, "FLOW_SEQ") == 0) 1210 pkt_dev->flags |= F_FLOW_SEQ; 1211 1212 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1213 pkt_dev->flags |= F_QUEUE_MAP_RND; 1214 1215 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1216 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1217 1218 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1219 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1220 1221 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1222 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1223 #ifdef CONFIG_XFRM 1224 else if (strcmp(f, "IPSEC") == 0) 1225 pkt_dev->flags |= F_IPSEC_ON; 1226 #endif 1227 1228 else if (strcmp(f, "!IPV6") == 0) 1229 pkt_dev->flags &= ~F_IPV6; 1230 1231 else if (strcmp(f, "NODE_ALLOC") == 0) 1232 pkt_dev->flags |= F_NODE; 1233 1234 else if (strcmp(f, "!NODE_ALLOC") == 0) 1235 pkt_dev->flags &= ~F_NODE; 1236 1237 else if (strcmp(f, "UDPCSUM") == 0) 1238 pkt_dev->flags |= F_UDPCSUM; 1239 1240 else if (strcmp(f, "!UDPCSUM") == 0) 1241 pkt_dev->flags &= ~F_UDPCSUM; 1242 1243 else { 1244 sprintf(pg_result, 1245 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1246 f, 1247 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1248 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1249 return count; 1250 } 1251 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1252 return count; 1253 } 1254 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1255 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1256 if (len < 0) 1257 return len; 1258 1259 if (copy_from_user(buf, &user_buffer[i], len)) 1260 return -EFAULT; 1261 buf[len] = 0; 1262 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1263 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1264 strncpy(pkt_dev->dst_min, buf, len); 1265 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1266 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1267 } 1268 if (debug) 1269 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1270 i += len; 1271 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1272 return count; 1273 } 1274 if (!strcmp(name, "dst_max")) { 1275 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1276 if (len < 0) 1277 return len; 1278 1279 1280 if (copy_from_user(buf, &user_buffer[i], len)) 1281 return -EFAULT; 1282 1283 buf[len] = 0; 1284 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1285 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1286 strncpy(pkt_dev->dst_max, buf, len); 1287 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1288 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1289 } 1290 if (debug) 1291 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1292 i += len; 1293 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1294 return count; 1295 } 1296 if (!strcmp(name, "dst6")) { 1297 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1298 if (len < 0) 1299 return len; 1300 1301 pkt_dev->flags |= F_IPV6; 1302 1303 if (copy_from_user(buf, &user_buffer[i], len)) 1304 return -EFAULT; 1305 buf[len] = 0; 1306 1307 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1308 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1309 1310 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1311 1312 if (debug) 1313 pr_debug("dst6 set to: %s\n", buf); 1314 1315 i += len; 1316 sprintf(pg_result, "OK: dst6=%s", buf); 1317 return count; 1318 } 1319 if (!strcmp(name, "dst6_min")) { 1320 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1321 if (len < 0) 1322 return len; 1323 1324 pkt_dev->flags |= F_IPV6; 1325 1326 if (copy_from_user(buf, &user_buffer[i], len)) 1327 return -EFAULT; 1328 buf[len] = 0; 1329 1330 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1331 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1332 1333 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1334 if (debug) 1335 pr_debug("dst6_min set to: %s\n", buf); 1336 1337 i += len; 1338 sprintf(pg_result, "OK: dst6_min=%s", buf); 1339 return count; 1340 } 1341 if (!strcmp(name, "dst6_max")) { 1342 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1343 if (len < 0) 1344 return len; 1345 1346 pkt_dev->flags |= F_IPV6; 1347 1348 if (copy_from_user(buf, &user_buffer[i], len)) 1349 return -EFAULT; 1350 buf[len] = 0; 1351 1352 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1353 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1354 1355 if (debug) 1356 pr_debug("dst6_max set to: %s\n", buf); 1357 1358 i += len; 1359 sprintf(pg_result, "OK: dst6_max=%s", buf); 1360 return count; 1361 } 1362 if (!strcmp(name, "src6")) { 1363 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1364 if (len < 0) 1365 return len; 1366 1367 pkt_dev->flags |= F_IPV6; 1368 1369 if (copy_from_user(buf, &user_buffer[i], len)) 1370 return -EFAULT; 1371 buf[len] = 0; 1372 1373 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1374 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1375 1376 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1377 1378 if (debug) 1379 pr_debug("src6 set to: %s\n", buf); 1380 1381 i += len; 1382 sprintf(pg_result, "OK: src6=%s", buf); 1383 return count; 1384 } 1385 if (!strcmp(name, "src_min")) { 1386 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1387 if (len < 0) 1388 return len; 1389 1390 if (copy_from_user(buf, &user_buffer[i], len)) 1391 return -EFAULT; 1392 buf[len] = 0; 1393 if (strcmp(buf, pkt_dev->src_min) != 0) { 1394 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1395 strncpy(pkt_dev->src_min, buf, len); 1396 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1397 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1398 } 1399 if (debug) 1400 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1401 i += len; 1402 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1403 return count; 1404 } 1405 if (!strcmp(name, "src_max")) { 1406 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1407 if (len < 0) 1408 return len; 1409 1410 if (copy_from_user(buf, &user_buffer[i], len)) 1411 return -EFAULT; 1412 buf[len] = 0; 1413 if (strcmp(buf, pkt_dev->src_max) != 0) { 1414 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1415 strncpy(pkt_dev->src_max, buf, len); 1416 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1417 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1418 } 1419 if (debug) 1420 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1421 i += len; 1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1423 return count; 1424 } 1425 if (!strcmp(name, "dst_mac")) { 1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1427 if (len < 0) 1428 return len; 1429 1430 memset(valstr, 0, sizeof(valstr)); 1431 if (copy_from_user(valstr, &user_buffer[i], len)) 1432 return -EFAULT; 1433 1434 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1435 return -EINVAL; 1436 /* Set up Dest MAC */ 1437 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1438 1439 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1440 return count; 1441 } 1442 if (!strcmp(name, "src_mac")) { 1443 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1444 if (len < 0) 1445 return len; 1446 1447 memset(valstr, 0, sizeof(valstr)); 1448 if (copy_from_user(valstr, &user_buffer[i], len)) 1449 return -EFAULT; 1450 1451 if (!mac_pton(valstr, pkt_dev->src_mac)) 1452 return -EINVAL; 1453 /* Set up Src MAC */ 1454 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1455 1456 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1457 return count; 1458 } 1459 1460 if (!strcmp(name, "clear_counters")) { 1461 pktgen_clear_counters(pkt_dev); 1462 sprintf(pg_result, "OK: Clearing counters.\n"); 1463 return count; 1464 } 1465 1466 if (!strcmp(name, "flows")) { 1467 len = num_arg(&user_buffer[i], 10, &value); 1468 if (len < 0) 1469 return len; 1470 1471 i += len; 1472 if (value > MAX_CFLOWS) 1473 value = MAX_CFLOWS; 1474 1475 pkt_dev->cflows = value; 1476 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1477 return count; 1478 } 1479 1480 if (!strcmp(name, "flowlen")) { 1481 len = num_arg(&user_buffer[i], 10, &value); 1482 if (len < 0) 1483 return len; 1484 1485 i += len; 1486 pkt_dev->lflow = value; 1487 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1488 return count; 1489 } 1490 1491 if (!strcmp(name, "queue_map_min")) { 1492 len = num_arg(&user_buffer[i], 5, &value); 1493 if (len < 0) 1494 return len; 1495 1496 i += len; 1497 pkt_dev->queue_map_min = value; 1498 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1499 return count; 1500 } 1501 1502 if (!strcmp(name, "queue_map_max")) { 1503 len = num_arg(&user_buffer[i], 5, &value); 1504 if (len < 0) 1505 return len; 1506 1507 i += len; 1508 pkt_dev->queue_map_max = value; 1509 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1510 return count; 1511 } 1512 1513 if (!strcmp(name, "mpls")) { 1514 unsigned int n, cnt; 1515 1516 len = get_labels(&user_buffer[i], pkt_dev); 1517 if (len < 0) 1518 return len; 1519 i += len; 1520 cnt = sprintf(pg_result, "OK: mpls="); 1521 for (n = 0; n < pkt_dev->nr_labels; n++) 1522 cnt += sprintf(pg_result + cnt, 1523 "%08x%s", ntohl(pkt_dev->labels[n]), 1524 n == pkt_dev->nr_labels-1 ? "" : ","); 1525 1526 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1527 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1528 pkt_dev->svlan_id = 0xffff; 1529 1530 if (debug) 1531 pr_debug("VLAN/SVLAN auto turned off\n"); 1532 } 1533 return count; 1534 } 1535 1536 if (!strcmp(name, "vlan_id")) { 1537 len = num_arg(&user_buffer[i], 4, &value); 1538 if (len < 0) 1539 return len; 1540 1541 i += len; 1542 if (value <= 4095) { 1543 pkt_dev->vlan_id = value; /* turn on VLAN */ 1544 1545 if (debug) 1546 pr_debug("VLAN turned on\n"); 1547 1548 if (debug && pkt_dev->nr_labels) 1549 pr_debug("MPLS auto turned off\n"); 1550 1551 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1552 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1553 } else { 1554 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1555 pkt_dev->svlan_id = 0xffff; 1556 1557 if (debug) 1558 pr_debug("VLAN/SVLAN turned off\n"); 1559 } 1560 return count; 1561 } 1562 1563 if (!strcmp(name, "vlan_p")) { 1564 len = num_arg(&user_buffer[i], 1, &value); 1565 if (len < 0) 1566 return len; 1567 1568 i += len; 1569 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1570 pkt_dev->vlan_p = value; 1571 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1572 } else { 1573 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1574 } 1575 return count; 1576 } 1577 1578 if (!strcmp(name, "vlan_cfi")) { 1579 len = num_arg(&user_buffer[i], 1, &value); 1580 if (len < 0) 1581 return len; 1582 1583 i += len; 1584 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1585 pkt_dev->vlan_cfi = value; 1586 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1587 } else { 1588 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1589 } 1590 return count; 1591 } 1592 1593 if (!strcmp(name, "svlan_id")) { 1594 len = num_arg(&user_buffer[i], 4, &value); 1595 if (len < 0) 1596 return len; 1597 1598 i += len; 1599 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1600 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1601 1602 if (debug) 1603 pr_debug("SVLAN turned on\n"); 1604 1605 if (debug && pkt_dev->nr_labels) 1606 pr_debug("MPLS auto turned off\n"); 1607 1608 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1609 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1610 } else { 1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1612 pkt_dev->svlan_id = 0xffff; 1613 1614 if (debug) 1615 pr_debug("VLAN/SVLAN turned off\n"); 1616 } 1617 return count; 1618 } 1619 1620 if (!strcmp(name, "svlan_p")) { 1621 len = num_arg(&user_buffer[i], 1, &value); 1622 if (len < 0) 1623 return len; 1624 1625 i += len; 1626 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1627 pkt_dev->svlan_p = value; 1628 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1629 } else { 1630 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1631 } 1632 return count; 1633 } 1634 1635 if (!strcmp(name, "svlan_cfi")) { 1636 len = num_arg(&user_buffer[i], 1, &value); 1637 if (len < 0) 1638 return len; 1639 1640 i += len; 1641 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1642 pkt_dev->svlan_cfi = value; 1643 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1644 } else { 1645 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1646 } 1647 return count; 1648 } 1649 1650 if (!strcmp(name, "tos")) { 1651 __u32 tmp_value = 0; 1652 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1653 if (len < 0) 1654 return len; 1655 1656 i += len; 1657 if (len == 2) { 1658 pkt_dev->tos = tmp_value; 1659 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1660 } else { 1661 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1662 } 1663 return count; 1664 } 1665 1666 if (!strcmp(name, "traffic_class")) { 1667 __u32 tmp_value = 0; 1668 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1669 if (len < 0) 1670 return len; 1671 1672 i += len; 1673 if (len == 2) { 1674 pkt_dev->traffic_class = tmp_value; 1675 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1676 } else { 1677 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1678 } 1679 return count; 1680 } 1681 1682 if (!strcmp(name, "skb_priority")) { 1683 len = num_arg(&user_buffer[i], 9, &value); 1684 if (len < 0) 1685 return len; 1686 1687 i += len; 1688 pkt_dev->skb_priority = value; 1689 sprintf(pg_result, "OK: skb_priority=%i", 1690 pkt_dev->skb_priority); 1691 return count; 1692 } 1693 1694 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1695 return -EINVAL; 1696 } 1697 1698 static int pktgen_if_open(struct inode *inode, struct file *file) 1699 { 1700 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1701 } 1702 1703 static const struct file_operations pktgen_if_fops = { 1704 .owner = THIS_MODULE, 1705 .open = pktgen_if_open, 1706 .read = seq_read, 1707 .llseek = seq_lseek, 1708 .write = pktgen_if_write, 1709 .release = single_release, 1710 }; 1711 1712 static int pktgen_thread_show(struct seq_file *seq, void *v) 1713 { 1714 struct pktgen_thread *t = seq->private; 1715 const struct pktgen_dev *pkt_dev; 1716 1717 BUG_ON(!t); 1718 1719 seq_printf(seq, "Running: "); 1720 1721 if_lock(t); 1722 list_for_each_entry(pkt_dev, &t->if_list, list) 1723 if (pkt_dev->running) 1724 seq_printf(seq, "%s ", pkt_dev->odevname); 1725 1726 seq_printf(seq, "\nStopped: "); 1727 1728 list_for_each_entry(pkt_dev, &t->if_list, list) 1729 if (!pkt_dev->running) 1730 seq_printf(seq, "%s ", pkt_dev->odevname); 1731 1732 if (t->result[0]) 1733 seq_printf(seq, "\nResult: %s\n", t->result); 1734 else 1735 seq_printf(seq, "\nResult: NA\n"); 1736 1737 if_unlock(t); 1738 1739 return 0; 1740 } 1741 1742 static ssize_t pktgen_thread_write(struct file *file, 1743 const char __user * user_buffer, 1744 size_t count, loff_t * offset) 1745 { 1746 struct seq_file *seq = file->private_data; 1747 struct pktgen_thread *t = seq->private; 1748 int i, max, len, ret; 1749 char name[40]; 1750 char *pg_result; 1751 1752 if (count < 1) { 1753 // sprintf(pg_result, "Wrong command format"); 1754 return -EINVAL; 1755 } 1756 1757 max = count; 1758 len = count_trail_chars(user_buffer, max); 1759 if (len < 0) 1760 return len; 1761 1762 i = len; 1763 1764 /* Read variable name */ 1765 1766 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1767 if (len < 0) 1768 return len; 1769 1770 memset(name, 0, sizeof(name)); 1771 if (copy_from_user(name, &user_buffer[i], len)) 1772 return -EFAULT; 1773 i += len; 1774 1775 max = count - i; 1776 len = count_trail_chars(&user_buffer[i], max); 1777 if (len < 0) 1778 return len; 1779 1780 i += len; 1781 1782 if (debug) 1783 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1784 1785 if (!t) { 1786 pr_err("ERROR: No thread\n"); 1787 ret = -EINVAL; 1788 goto out; 1789 } 1790 1791 pg_result = &(t->result[0]); 1792 1793 if (!strcmp(name, "add_device")) { 1794 char f[32]; 1795 memset(f, 0, 32); 1796 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1797 if (len < 0) { 1798 ret = len; 1799 goto out; 1800 } 1801 if (copy_from_user(f, &user_buffer[i], len)) 1802 return -EFAULT; 1803 i += len; 1804 mutex_lock(&pktgen_thread_lock); 1805 ret = pktgen_add_device(t, f); 1806 mutex_unlock(&pktgen_thread_lock); 1807 if (!ret) { 1808 ret = count; 1809 sprintf(pg_result, "OK: add_device=%s", f); 1810 } else 1811 sprintf(pg_result, "ERROR: can not add device %s", f); 1812 goto out; 1813 } 1814 1815 if (!strcmp(name, "rem_device_all")) { 1816 mutex_lock(&pktgen_thread_lock); 1817 t->control |= T_REMDEVALL; 1818 mutex_unlock(&pktgen_thread_lock); 1819 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1820 ret = count; 1821 sprintf(pg_result, "OK: rem_device_all"); 1822 goto out; 1823 } 1824 1825 if (!strcmp(name, "max_before_softirq")) { 1826 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1827 ret = count; 1828 goto out; 1829 } 1830 1831 ret = -EINVAL; 1832 out: 1833 return ret; 1834 } 1835 1836 static int pktgen_thread_open(struct inode *inode, struct file *file) 1837 { 1838 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1839 } 1840 1841 static const struct file_operations pktgen_thread_fops = { 1842 .owner = THIS_MODULE, 1843 .open = pktgen_thread_open, 1844 .read = seq_read, 1845 .llseek = seq_lseek, 1846 .write = pktgen_thread_write, 1847 .release = single_release, 1848 }; 1849 1850 /* Think find or remove for NN */ 1851 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1852 const char *ifname, int remove) 1853 { 1854 struct pktgen_thread *t; 1855 struct pktgen_dev *pkt_dev = NULL; 1856 bool exact = (remove == FIND); 1857 1858 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1859 pkt_dev = pktgen_find_dev(t, ifname, exact); 1860 if (pkt_dev) { 1861 if (remove) { 1862 if_lock(t); 1863 pkt_dev->removal_mark = 1; 1864 t->control |= T_REMDEV; 1865 if_unlock(t); 1866 } 1867 break; 1868 } 1869 } 1870 return pkt_dev; 1871 } 1872 1873 /* 1874 * mark a device for removal 1875 */ 1876 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1877 { 1878 struct pktgen_dev *pkt_dev = NULL; 1879 const int max_tries = 10, msec_per_try = 125; 1880 int i = 0; 1881 1882 mutex_lock(&pktgen_thread_lock); 1883 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1884 1885 while (1) { 1886 1887 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1888 if (pkt_dev == NULL) 1889 break; /* success */ 1890 1891 mutex_unlock(&pktgen_thread_lock); 1892 pr_debug("%s: waiting for %s to disappear....\n", 1893 __func__, ifname); 1894 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1895 mutex_lock(&pktgen_thread_lock); 1896 1897 if (++i >= max_tries) { 1898 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1899 __func__, msec_per_try * i, ifname); 1900 break; 1901 } 1902 1903 } 1904 1905 mutex_unlock(&pktgen_thread_lock); 1906 } 1907 1908 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 1909 { 1910 struct pktgen_thread *t; 1911 1912 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1913 struct pktgen_dev *pkt_dev; 1914 1915 list_for_each_entry(pkt_dev, &t->if_list, list) { 1916 if (pkt_dev->odev != dev) 1917 continue; 1918 1919 proc_remove(pkt_dev->entry); 1920 1921 pkt_dev->entry = proc_create_data(dev->name, 0600, 1922 pn->proc_dir, 1923 &pktgen_if_fops, 1924 pkt_dev); 1925 if (!pkt_dev->entry) 1926 pr_err("can't move proc entry for '%s'\n", 1927 dev->name); 1928 break; 1929 } 1930 } 1931 } 1932 1933 static int pktgen_device_event(struct notifier_block *unused, 1934 unsigned long event, void *ptr) 1935 { 1936 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1937 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 1938 1939 if (pn->pktgen_exiting) 1940 return NOTIFY_DONE; 1941 1942 /* It is OK that we do not hold the group lock right now, 1943 * as we run under the RTNL lock. 1944 */ 1945 1946 switch (event) { 1947 case NETDEV_CHANGENAME: 1948 pktgen_change_name(pn, dev); 1949 break; 1950 1951 case NETDEV_UNREGISTER: 1952 pktgen_mark_device(pn, dev->name); 1953 break; 1954 } 1955 1956 return NOTIFY_DONE; 1957 } 1958 1959 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 1960 struct pktgen_dev *pkt_dev, 1961 const char *ifname) 1962 { 1963 char b[IFNAMSIZ+5]; 1964 int i; 1965 1966 for (i = 0; ifname[i] != '@'; i++) { 1967 if (i == IFNAMSIZ) 1968 break; 1969 1970 b[i] = ifname[i]; 1971 } 1972 b[i] = 0; 1973 1974 return dev_get_by_name(pn->net, b); 1975 } 1976 1977 1978 /* Associate pktgen_dev with a device. */ 1979 1980 static int pktgen_setup_dev(const struct pktgen_net *pn, 1981 struct pktgen_dev *pkt_dev, const char *ifname) 1982 { 1983 struct net_device *odev; 1984 int err; 1985 1986 /* Clean old setups */ 1987 if (pkt_dev->odev) { 1988 dev_put(pkt_dev->odev); 1989 pkt_dev->odev = NULL; 1990 } 1991 1992 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 1993 if (!odev) { 1994 pr_err("no such netdevice: \"%s\"\n", ifname); 1995 return -ENODEV; 1996 } 1997 1998 if (odev->type != ARPHRD_ETHER) { 1999 pr_err("not an ethernet device: \"%s\"\n", ifname); 2000 err = -EINVAL; 2001 } else if (!netif_running(odev)) { 2002 pr_err("device is down: \"%s\"\n", ifname); 2003 err = -ENETDOWN; 2004 } else { 2005 pkt_dev->odev = odev; 2006 return 0; 2007 } 2008 2009 dev_put(odev); 2010 return err; 2011 } 2012 2013 /* Read pkt_dev from the interface and set up internal pktgen_dev 2014 * structure to have the right information to create/send packets 2015 */ 2016 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2017 { 2018 int ntxq; 2019 2020 if (!pkt_dev->odev) { 2021 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2022 sprintf(pkt_dev->result, 2023 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2024 return; 2025 } 2026 2027 /* make sure that we don't pick a non-existing transmit queue */ 2028 ntxq = pkt_dev->odev->real_num_tx_queues; 2029 2030 if (ntxq <= pkt_dev->queue_map_min) { 2031 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2032 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2033 pkt_dev->odevname); 2034 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2035 } 2036 if (pkt_dev->queue_map_max >= ntxq) { 2037 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2038 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2039 pkt_dev->odevname); 2040 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2041 } 2042 2043 /* Default to the interface's mac if not explicitly set. */ 2044 2045 if (is_zero_ether_addr(pkt_dev->src_mac)) 2046 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2047 2048 /* Set up Dest MAC */ 2049 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2050 2051 if (pkt_dev->flags & F_IPV6) { 2052 int i, set = 0, err = 1; 2053 struct inet6_dev *idev; 2054 2055 if (pkt_dev->min_pkt_size == 0) { 2056 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2057 + sizeof(struct udphdr) 2058 + sizeof(struct pktgen_hdr) 2059 + pkt_dev->pkt_overhead; 2060 } 2061 2062 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2063 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2064 set = 1; 2065 break; 2066 } 2067 2068 if (!set) { 2069 2070 /* 2071 * Use linklevel address if unconfigured. 2072 * 2073 * use ipv6_get_lladdr if/when it's get exported 2074 */ 2075 2076 rcu_read_lock(); 2077 idev = __in6_dev_get(pkt_dev->odev); 2078 if (idev) { 2079 struct inet6_ifaddr *ifp; 2080 2081 read_lock_bh(&idev->lock); 2082 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2083 if ((ifp->scope & IFA_LINK) && 2084 !(ifp->flags & IFA_F_TENTATIVE)) { 2085 pkt_dev->cur_in6_saddr = ifp->addr; 2086 err = 0; 2087 break; 2088 } 2089 } 2090 read_unlock_bh(&idev->lock); 2091 } 2092 rcu_read_unlock(); 2093 if (err) 2094 pr_err("ERROR: IPv6 link address not available\n"); 2095 } 2096 } else { 2097 if (pkt_dev->min_pkt_size == 0) { 2098 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2099 + sizeof(struct udphdr) 2100 + sizeof(struct pktgen_hdr) 2101 + pkt_dev->pkt_overhead; 2102 } 2103 2104 pkt_dev->saddr_min = 0; 2105 pkt_dev->saddr_max = 0; 2106 if (strlen(pkt_dev->src_min) == 0) { 2107 2108 struct in_device *in_dev; 2109 2110 rcu_read_lock(); 2111 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2112 if (in_dev) { 2113 if (in_dev->ifa_list) { 2114 pkt_dev->saddr_min = 2115 in_dev->ifa_list->ifa_address; 2116 pkt_dev->saddr_max = pkt_dev->saddr_min; 2117 } 2118 } 2119 rcu_read_unlock(); 2120 } else { 2121 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2122 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2123 } 2124 2125 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2126 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2127 } 2128 /* Initialize current values. */ 2129 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2130 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2131 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2132 2133 pkt_dev->cur_dst_mac_offset = 0; 2134 pkt_dev->cur_src_mac_offset = 0; 2135 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2136 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2137 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2138 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2139 pkt_dev->nflows = 0; 2140 } 2141 2142 2143 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2144 { 2145 ktime_t start_time, end_time; 2146 s64 remaining; 2147 struct hrtimer_sleeper t; 2148 2149 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2150 hrtimer_set_expires(&t.timer, spin_until); 2151 2152 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2153 if (remaining <= 0) { 2154 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2155 return; 2156 } 2157 2158 start_time = ktime_get(); 2159 if (remaining < 100000) { 2160 /* for small delays (<100us), just loop until limit is reached */ 2161 do { 2162 end_time = ktime_get(); 2163 } while (ktime_compare(end_time, spin_until) < 0); 2164 } else { 2165 /* see do_nanosleep */ 2166 hrtimer_init_sleeper(&t, current); 2167 do { 2168 set_current_state(TASK_INTERRUPTIBLE); 2169 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2170 if (!hrtimer_active(&t.timer)) 2171 t.task = NULL; 2172 2173 if (likely(t.task)) 2174 schedule(); 2175 2176 hrtimer_cancel(&t.timer); 2177 } while (t.task && pkt_dev->running && !signal_pending(current)); 2178 __set_current_state(TASK_RUNNING); 2179 end_time = ktime_get(); 2180 } 2181 2182 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2183 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2184 } 2185 2186 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2187 { 2188 pkt_dev->pkt_overhead = 0; 2189 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2190 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2191 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2192 } 2193 2194 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2195 { 2196 return !!(pkt_dev->flows[flow].flags & F_INIT); 2197 } 2198 2199 static inline int f_pick(struct pktgen_dev *pkt_dev) 2200 { 2201 int flow = pkt_dev->curfl; 2202 2203 if (pkt_dev->flags & F_FLOW_SEQ) { 2204 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2205 /* reset time */ 2206 pkt_dev->flows[flow].count = 0; 2207 pkt_dev->flows[flow].flags = 0; 2208 pkt_dev->curfl += 1; 2209 if (pkt_dev->curfl >= pkt_dev->cflows) 2210 pkt_dev->curfl = 0; /*reset */ 2211 } 2212 } else { 2213 flow = prandom_u32() % pkt_dev->cflows; 2214 pkt_dev->curfl = flow; 2215 2216 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2217 pkt_dev->flows[flow].count = 0; 2218 pkt_dev->flows[flow].flags = 0; 2219 } 2220 } 2221 2222 return pkt_dev->curfl; 2223 } 2224 2225 2226 #ifdef CONFIG_XFRM 2227 /* If there was already an IPSEC SA, we keep it as is, else 2228 * we go look for it ... 2229 */ 2230 #define DUMMY_MARK 0 2231 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2232 { 2233 struct xfrm_state *x = pkt_dev->flows[flow].x; 2234 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2235 if (!x) { 2236 /*slow path: we dont already have xfrm_state*/ 2237 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2238 (xfrm_address_t *)&pkt_dev->cur_daddr, 2239 (xfrm_address_t *)&pkt_dev->cur_saddr, 2240 AF_INET, 2241 pkt_dev->ipsmode, 2242 pkt_dev->ipsproto, 0); 2243 if (x) { 2244 pkt_dev->flows[flow].x = x; 2245 set_pkt_overhead(pkt_dev); 2246 pkt_dev->pkt_overhead += x->props.header_len; 2247 } 2248 2249 } 2250 } 2251 #endif 2252 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2253 { 2254 2255 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2256 pkt_dev->cur_queue_map = smp_processor_id(); 2257 2258 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2259 __u16 t; 2260 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2261 t = prandom_u32() % 2262 (pkt_dev->queue_map_max - 2263 pkt_dev->queue_map_min + 1) 2264 + pkt_dev->queue_map_min; 2265 } else { 2266 t = pkt_dev->cur_queue_map + 1; 2267 if (t > pkt_dev->queue_map_max) 2268 t = pkt_dev->queue_map_min; 2269 } 2270 pkt_dev->cur_queue_map = t; 2271 } 2272 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2273 } 2274 2275 /* Increment/randomize headers according to flags and current values 2276 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2277 */ 2278 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2279 { 2280 __u32 imn; 2281 __u32 imx; 2282 int flow = 0; 2283 2284 if (pkt_dev->cflows) 2285 flow = f_pick(pkt_dev); 2286 2287 /* Deal with source MAC */ 2288 if (pkt_dev->src_mac_count > 1) { 2289 __u32 mc; 2290 __u32 tmp; 2291 2292 if (pkt_dev->flags & F_MACSRC_RND) 2293 mc = prandom_u32() % pkt_dev->src_mac_count; 2294 else { 2295 mc = pkt_dev->cur_src_mac_offset++; 2296 if (pkt_dev->cur_src_mac_offset >= 2297 pkt_dev->src_mac_count) 2298 pkt_dev->cur_src_mac_offset = 0; 2299 } 2300 2301 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2302 pkt_dev->hh[11] = tmp; 2303 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2304 pkt_dev->hh[10] = tmp; 2305 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2306 pkt_dev->hh[9] = tmp; 2307 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2308 pkt_dev->hh[8] = tmp; 2309 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2310 pkt_dev->hh[7] = tmp; 2311 } 2312 2313 /* Deal with Destination MAC */ 2314 if (pkt_dev->dst_mac_count > 1) { 2315 __u32 mc; 2316 __u32 tmp; 2317 2318 if (pkt_dev->flags & F_MACDST_RND) 2319 mc = prandom_u32() % pkt_dev->dst_mac_count; 2320 2321 else { 2322 mc = pkt_dev->cur_dst_mac_offset++; 2323 if (pkt_dev->cur_dst_mac_offset >= 2324 pkt_dev->dst_mac_count) { 2325 pkt_dev->cur_dst_mac_offset = 0; 2326 } 2327 } 2328 2329 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2330 pkt_dev->hh[5] = tmp; 2331 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2332 pkt_dev->hh[4] = tmp; 2333 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2334 pkt_dev->hh[3] = tmp; 2335 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2336 pkt_dev->hh[2] = tmp; 2337 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2338 pkt_dev->hh[1] = tmp; 2339 } 2340 2341 if (pkt_dev->flags & F_MPLS_RND) { 2342 unsigned int i; 2343 for (i = 0; i < pkt_dev->nr_labels; i++) 2344 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2345 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2346 ((__force __be32)prandom_u32() & 2347 htonl(0x000fffff)); 2348 } 2349 2350 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2351 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2352 } 2353 2354 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2355 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2356 } 2357 2358 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2359 if (pkt_dev->flags & F_UDPSRC_RND) 2360 pkt_dev->cur_udp_src = prandom_u32() % 2361 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2362 + pkt_dev->udp_src_min; 2363 2364 else { 2365 pkt_dev->cur_udp_src++; 2366 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2367 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2368 } 2369 } 2370 2371 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2372 if (pkt_dev->flags & F_UDPDST_RND) { 2373 pkt_dev->cur_udp_dst = prandom_u32() % 2374 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2375 + pkt_dev->udp_dst_min; 2376 } else { 2377 pkt_dev->cur_udp_dst++; 2378 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2379 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2380 } 2381 } 2382 2383 if (!(pkt_dev->flags & F_IPV6)) { 2384 2385 imn = ntohl(pkt_dev->saddr_min); 2386 imx = ntohl(pkt_dev->saddr_max); 2387 if (imn < imx) { 2388 __u32 t; 2389 if (pkt_dev->flags & F_IPSRC_RND) 2390 t = prandom_u32() % (imx - imn) + imn; 2391 else { 2392 t = ntohl(pkt_dev->cur_saddr); 2393 t++; 2394 if (t > imx) 2395 t = imn; 2396 2397 } 2398 pkt_dev->cur_saddr = htonl(t); 2399 } 2400 2401 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2402 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2403 } else { 2404 imn = ntohl(pkt_dev->daddr_min); 2405 imx = ntohl(pkt_dev->daddr_max); 2406 if (imn < imx) { 2407 __u32 t; 2408 __be32 s; 2409 if (pkt_dev->flags & F_IPDST_RND) { 2410 2411 do { 2412 t = prandom_u32() % 2413 (imx - imn) + imn; 2414 s = htonl(t); 2415 } while (ipv4_is_loopback(s) || 2416 ipv4_is_multicast(s) || 2417 ipv4_is_lbcast(s) || 2418 ipv4_is_zeronet(s) || 2419 ipv4_is_local_multicast(s)); 2420 pkt_dev->cur_daddr = s; 2421 } else { 2422 t = ntohl(pkt_dev->cur_daddr); 2423 t++; 2424 if (t > imx) { 2425 t = imn; 2426 } 2427 pkt_dev->cur_daddr = htonl(t); 2428 } 2429 } 2430 if (pkt_dev->cflows) { 2431 pkt_dev->flows[flow].flags |= F_INIT; 2432 pkt_dev->flows[flow].cur_daddr = 2433 pkt_dev->cur_daddr; 2434 #ifdef CONFIG_XFRM 2435 if (pkt_dev->flags & F_IPSEC_ON) 2436 get_ipsec_sa(pkt_dev, flow); 2437 #endif 2438 pkt_dev->nflows++; 2439 } 2440 } 2441 } else { /* IPV6 * */ 2442 2443 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2444 int i; 2445 2446 /* Only random destinations yet */ 2447 2448 for (i = 0; i < 4; i++) { 2449 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2450 (((__force __be32)prandom_u32() | 2451 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2452 pkt_dev->max_in6_daddr.s6_addr32[i]); 2453 } 2454 } 2455 } 2456 2457 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2458 __u32 t; 2459 if (pkt_dev->flags & F_TXSIZE_RND) { 2460 t = prandom_u32() % 2461 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2462 + pkt_dev->min_pkt_size; 2463 } else { 2464 t = pkt_dev->cur_pkt_size + 1; 2465 if (t > pkt_dev->max_pkt_size) 2466 t = pkt_dev->min_pkt_size; 2467 } 2468 pkt_dev->cur_pkt_size = t; 2469 } 2470 2471 set_cur_queue_map(pkt_dev); 2472 2473 pkt_dev->flows[flow].count++; 2474 } 2475 2476 2477 #ifdef CONFIG_XFRM 2478 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2479 { 2480 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2481 int err = 0; 2482 2483 if (!x) 2484 return 0; 2485 /* XXX: we dont support tunnel mode for now until 2486 * we resolve the dst issue */ 2487 if (x->props.mode != XFRM_MODE_TRANSPORT) 2488 return 0; 2489 2490 spin_lock(&x->lock); 2491 2492 err = x->outer_mode->output(x, skb); 2493 if (err) 2494 goto error; 2495 err = x->type->output(x, skb); 2496 if (err) 2497 goto error; 2498 2499 x->curlft.bytes += skb->len; 2500 x->curlft.packets++; 2501 error: 2502 spin_unlock(&x->lock); 2503 return err; 2504 } 2505 2506 static void free_SAs(struct pktgen_dev *pkt_dev) 2507 { 2508 if (pkt_dev->cflows) { 2509 /* let go of the SAs if we have them */ 2510 int i; 2511 for (i = 0; i < pkt_dev->cflows; i++) { 2512 struct xfrm_state *x = pkt_dev->flows[i].x; 2513 if (x) { 2514 xfrm_state_put(x); 2515 pkt_dev->flows[i].x = NULL; 2516 } 2517 } 2518 } 2519 } 2520 2521 static int process_ipsec(struct pktgen_dev *pkt_dev, 2522 struct sk_buff *skb, __be16 protocol) 2523 { 2524 if (pkt_dev->flags & F_IPSEC_ON) { 2525 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2526 int nhead = 0; 2527 if (x) { 2528 int ret; 2529 __u8 *eth; 2530 nhead = x->props.header_len - skb_headroom(skb); 2531 if (nhead > 0) { 2532 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2533 if (ret < 0) { 2534 pr_err("Error expanding ipsec packet %d\n", 2535 ret); 2536 goto err; 2537 } 2538 } 2539 2540 /* ipsec is not expecting ll header */ 2541 skb_pull(skb, ETH_HLEN); 2542 ret = pktgen_output_ipsec(skb, pkt_dev); 2543 if (ret) { 2544 pr_err("Error creating ipsec packet %d\n", ret); 2545 goto err; 2546 } 2547 /* restore ll */ 2548 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2549 memcpy(eth, pkt_dev->hh, 12); 2550 *(u16 *) ð[12] = protocol; 2551 } 2552 } 2553 return 1; 2554 err: 2555 kfree_skb(skb); 2556 return 0; 2557 } 2558 #endif 2559 2560 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2561 { 2562 unsigned int i; 2563 for (i = 0; i < pkt_dev->nr_labels; i++) 2564 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2565 2566 mpls--; 2567 *mpls |= MPLS_STACK_BOTTOM; 2568 } 2569 2570 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2571 unsigned int prio) 2572 { 2573 return htons(id | (cfi << 12) | (prio << 13)); 2574 } 2575 2576 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2577 int datalen) 2578 { 2579 struct timeval timestamp; 2580 struct pktgen_hdr *pgh; 2581 2582 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2583 datalen -= sizeof(*pgh); 2584 2585 if (pkt_dev->nfrags <= 0) { 2586 memset(skb_put(skb, datalen), 0, datalen); 2587 } else { 2588 int frags = pkt_dev->nfrags; 2589 int i, len; 2590 int frag_len; 2591 2592 2593 if (frags > MAX_SKB_FRAGS) 2594 frags = MAX_SKB_FRAGS; 2595 len = datalen - frags * PAGE_SIZE; 2596 if (len > 0) { 2597 memset(skb_put(skb, len), 0, len); 2598 datalen = frags * PAGE_SIZE; 2599 } 2600 2601 i = 0; 2602 frag_len = (datalen/frags) < PAGE_SIZE ? 2603 (datalen/frags) : PAGE_SIZE; 2604 while (datalen > 0) { 2605 if (unlikely(!pkt_dev->page)) { 2606 int node = numa_node_id(); 2607 2608 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2609 node = pkt_dev->node; 2610 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2611 if (!pkt_dev->page) 2612 break; 2613 } 2614 get_page(pkt_dev->page); 2615 skb_frag_set_page(skb, i, pkt_dev->page); 2616 skb_shinfo(skb)->frags[i].page_offset = 0; 2617 /*last fragment, fill rest of data*/ 2618 if (i == (frags - 1)) 2619 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2620 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2621 else 2622 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2623 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2624 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2625 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2626 i++; 2627 skb_shinfo(skb)->nr_frags = i; 2628 } 2629 } 2630 2631 /* Stamp the time, and sequence number, 2632 * convert them to network byte order 2633 */ 2634 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2635 pgh->seq_num = htonl(pkt_dev->seq_num); 2636 2637 do_gettimeofday(×tamp); 2638 pgh->tv_sec = htonl(timestamp.tv_sec); 2639 pgh->tv_usec = htonl(timestamp.tv_usec); 2640 } 2641 2642 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2643 struct pktgen_dev *pkt_dev, 2644 unsigned int extralen) 2645 { 2646 struct sk_buff *skb = NULL; 2647 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2648 pkt_dev->pkt_overhead; 2649 2650 if (pkt_dev->flags & F_NODE) { 2651 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2652 2653 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2654 if (likely(skb)) { 2655 skb_reserve(skb, NET_SKB_PAD); 2656 skb->dev = dev; 2657 } 2658 } else { 2659 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2660 } 2661 2662 return skb; 2663 } 2664 2665 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2666 struct pktgen_dev *pkt_dev) 2667 { 2668 struct sk_buff *skb = NULL; 2669 __u8 *eth; 2670 struct udphdr *udph; 2671 int datalen, iplen; 2672 struct iphdr *iph; 2673 __be16 protocol = htons(ETH_P_IP); 2674 __be32 *mpls; 2675 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2676 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2677 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2678 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2679 u16 queue_map; 2680 2681 if (pkt_dev->nr_labels) 2682 protocol = htons(ETH_P_MPLS_UC); 2683 2684 if (pkt_dev->vlan_id != 0xffff) 2685 protocol = htons(ETH_P_8021Q); 2686 2687 /* Update any of the values, used when we're incrementing various 2688 * fields. 2689 */ 2690 mod_cur_headers(pkt_dev); 2691 queue_map = pkt_dev->cur_queue_map; 2692 2693 datalen = (odev->hard_header_len + 16) & ~0xf; 2694 2695 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2696 if (!skb) { 2697 sprintf(pkt_dev->result, "No memory"); 2698 return NULL; 2699 } 2700 2701 prefetchw(skb->data); 2702 skb_reserve(skb, datalen); 2703 2704 /* Reserve for ethernet and IP header */ 2705 eth = (__u8 *) skb_push(skb, 14); 2706 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2707 if (pkt_dev->nr_labels) 2708 mpls_push(mpls, pkt_dev); 2709 2710 if (pkt_dev->vlan_id != 0xffff) { 2711 if (pkt_dev->svlan_id != 0xffff) { 2712 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2713 *svlan_tci = build_tci(pkt_dev->svlan_id, 2714 pkt_dev->svlan_cfi, 2715 pkt_dev->svlan_p); 2716 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2717 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2718 } 2719 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2720 *vlan_tci = build_tci(pkt_dev->vlan_id, 2721 pkt_dev->vlan_cfi, 2722 pkt_dev->vlan_p); 2723 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2724 *vlan_encapsulated_proto = htons(ETH_P_IP); 2725 } 2726 2727 skb_set_mac_header(skb, 0); 2728 skb_set_network_header(skb, skb->len); 2729 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2730 2731 skb_set_transport_header(skb, skb->len); 2732 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2733 skb_set_queue_mapping(skb, queue_map); 2734 skb->priority = pkt_dev->skb_priority; 2735 2736 memcpy(eth, pkt_dev->hh, 12); 2737 *(__be16 *) & eth[12] = protocol; 2738 2739 /* Eth + IPh + UDPh + mpls */ 2740 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2741 pkt_dev->pkt_overhead; 2742 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2743 datalen = sizeof(struct pktgen_hdr); 2744 2745 udph->source = htons(pkt_dev->cur_udp_src); 2746 udph->dest = htons(pkt_dev->cur_udp_dst); 2747 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2748 udph->check = 0; 2749 2750 iph->ihl = 5; 2751 iph->version = 4; 2752 iph->ttl = 32; 2753 iph->tos = pkt_dev->tos; 2754 iph->protocol = IPPROTO_UDP; /* UDP */ 2755 iph->saddr = pkt_dev->cur_saddr; 2756 iph->daddr = pkt_dev->cur_daddr; 2757 iph->id = htons(pkt_dev->ip_id); 2758 pkt_dev->ip_id++; 2759 iph->frag_off = 0; 2760 iplen = 20 + 8 + datalen; 2761 iph->tot_len = htons(iplen); 2762 ip_send_check(iph); 2763 skb->protocol = protocol; 2764 skb->dev = odev; 2765 skb->pkt_type = PACKET_HOST; 2766 2767 if (!(pkt_dev->flags & F_UDPCSUM)) { 2768 skb->ip_summed = CHECKSUM_NONE; 2769 } else if (odev->features & NETIF_F_V4_CSUM) { 2770 skb->ip_summed = CHECKSUM_PARTIAL; 2771 skb->csum = 0; 2772 udp4_hwcsum(skb, udph->source, udph->dest); 2773 } else { 2774 __wsum csum = udp_csum(skb); 2775 2776 /* add protocol-dependent pseudo-header */ 2777 udph->check = csum_tcpudp_magic(udph->source, udph->dest, 2778 datalen + 8, IPPROTO_UDP, csum); 2779 2780 if (udph->check == 0) 2781 udph->check = CSUM_MANGLED_0; 2782 } 2783 2784 pktgen_finalize_skb(pkt_dev, skb, datalen); 2785 2786 #ifdef CONFIG_XFRM 2787 if (!process_ipsec(pkt_dev, skb, protocol)) 2788 return NULL; 2789 #endif 2790 2791 return skb; 2792 } 2793 2794 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2795 struct pktgen_dev *pkt_dev) 2796 { 2797 struct sk_buff *skb = NULL; 2798 __u8 *eth; 2799 struct udphdr *udph; 2800 int datalen, udplen; 2801 struct ipv6hdr *iph; 2802 __be16 protocol = htons(ETH_P_IPV6); 2803 __be32 *mpls; 2804 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2805 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2806 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2807 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2808 u16 queue_map; 2809 2810 if (pkt_dev->nr_labels) 2811 protocol = htons(ETH_P_MPLS_UC); 2812 2813 if (pkt_dev->vlan_id != 0xffff) 2814 protocol = htons(ETH_P_8021Q); 2815 2816 /* Update any of the values, used when we're incrementing various 2817 * fields. 2818 */ 2819 mod_cur_headers(pkt_dev); 2820 queue_map = pkt_dev->cur_queue_map; 2821 2822 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2823 if (!skb) { 2824 sprintf(pkt_dev->result, "No memory"); 2825 return NULL; 2826 } 2827 2828 prefetchw(skb->data); 2829 skb_reserve(skb, 16); 2830 2831 /* Reserve for ethernet and IP header */ 2832 eth = (__u8 *) skb_push(skb, 14); 2833 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2834 if (pkt_dev->nr_labels) 2835 mpls_push(mpls, pkt_dev); 2836 2837 if (pkt_dev->vlan_id != 0xffff) { 2838 if (pkt_dev->svlan_id != 0xffff) { 2839 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2840 *svlan_tci = build_tci(pkt_dev->svlan_id, 2841 pkt_dev->svlan_cfi, 2842 pkt_dev->svlan_p); 2843 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2844 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2845 } 2846 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2847 *vlan_tci = build_tci(pkt_dev->vlan_id, 2848 pkt_dev->vlan_cfi, 2849 pkt_dev->vlan_p); 2850 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2851 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2852 } 2853 2854 skb_set_mac_header(skb, 0); 2855 skb_set_network_header(skb, skb->len); 2856 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2857 2858 skb_set_transport_header(skb, skb->len); 2859 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2860 skb_set_queue_mapping(skb, queue_map); 2861 skb->priority = pkt_dev->skb_priority; 2862 2863 memcpy(eth, pkt_dev->hh, 12); 2864 *(__be16 *) ð[12] = protocol; 2865 2866 /* Eth + IPh + UDPh + mpls */ 2867 datalen = pkt_dev->cur_pkt_size - 14 - 2868 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2869 pkt_dev->pkt_overhead; 2870 2871 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2872 datalen = sizeof(struct pktgen_hdr); 2873 net_info_ratelimited("increased datalen to %d\n", datalen); 2874 } 2875 2876 udplen = datalen + sizeof(struct udphdr); 2877 udph->source = htons(pkt_dev->cur_udp_src); 2878 udph->dest = htons(pkt_dev->cur_udp_dst); 2879 udph->len = htons(udplen); 2880 udph->check = 0; 2881 2882 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2883 2884 if (pkt_dev->traffic_class) { 2885 /* Version + traffic class + flow (0) */ 2886 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2887 } 2888 2889 iph->hop_limit = 32; 2890 2891 iph->payload_len = htons(udplen); 2892 iph->nexthdr = IPPROTO_UDP; 2893 2894 iph->daddr = pkt_dev->cur_in6_daddr; 2895 iph->saddr = pkt_dev->cur_in6_saddr; 2896 2897 skb->protocol = protocol; 2898 skb->dev = odev; 2899 skb->pkt_type = PACKET_HOST; 2900 2901 if (!(pkt_dev->flags & F_UDPCSUM)) { 2902 skb->ip_summed = CHECKSUM_NONE; 2903 } else if (odev->features & NETIF_F_V6_CSUM) { 2904 skb->ip_summed = CHECKSUM_PARTIAL; 2905 skb->csum_start = skb_transport_header(skb) - skb->head; 2906 skb->csum_offset = offsetof(struct udphdr, check); 2907 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 2908 } else { 2909 __wsum csum = udp_csum(skb); 2910 2911 /* add protocol-dependent pseudo-header */ 2912 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 2913 2914 if (udph->check == 0) 2915 udph->check = CSUM_MANGLED_0; 2916 } 2917 2918 pktgen_finalize_skb(pkt_dev, skb, datalen); 2919 2920 return skb; 2921 } 2922 2923 static struct sk_buff *fill_packet(struct net_device *odev, 2924 struct pktgen_dev *pkt_dev) 2925 { 2926 if (pkt_dev->flags & F_IPV6) 2927 return fill_packet_ipv6(odev, pkt_dev); 2928 else 2929 return fill_packet_ipv4(odev, pkt_dev); 2930 } 2931 2932 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2933 { 2934 pkt_dev->seq_num = 1; 2935 pkt_dev->idle_acc = 0; 2936 pkt_dev->sofar = 0; 2937 pkt_dev->tx_bytes = 0; 2938 pkt_dev->errors = 0; 2939 } 2940 2941 /* Set up structure for sending pkts, clear counters */ 2942 2943 static void pktgen_run(struct pktgen_thread *t) 2944 { 2945 struct pktgen_dev *pkt_dev; 2946 int started = 0; 2947 2948 func_enter(); 2949 2950 if_lock(t); 2951 list_for_each_entry(pkt_dev, &t->if_list, list) { 2952 2953 /* 2954 * setup odev and create initial packet. 2955 */ 2956 pktgen_setup_inject(pkt_dev); 2957 2958 if (pkt_dev->odev) { 2959 pktgen_clear_counters(pkt_dev); 2960 pkt_dev->running = 1; /* Cranke yeself! */ 2961 pkt_dev->skb = NULL; 2962 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 2963 2964 set_pkt_overhead(pkt_dev); 2965 2966 strcpy(pkt_dev->result, "Starting"); 2967 started++; 2968 } else 2969 strcpy(pkt_dev->result, "Error starting"); 2970 } 2971 if_unlock(t); 2972 if (started) 2973 t->control &= ~(T_STOP); 2974 } 2975 2976 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 2977 { 2978 struct pktgen_thread *t; 2979 2980 func_enter(); 2981 2982 mutex_lock(&pktgen_thread_lock); 2983 2984 list_for_each_entry(t, &pn->pktgen_threads, th_list) 2985 t->control |= T_STOP; 2986 2987 mutex_unlock(&pktgen_thread_lock); 2988 } 2989 2990 static int thread_is_running(const struct pktgen_thread *t) 2991 { 2992 const struct pktgen_dev *pkt_dev; 2993 2994 list_for_each_entry(pkt_dev, &t->if_list, list) 2995 if (pkt_dev->running) 2996 return 1; 2997 return 0; 2998 } 2999 3000 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3001 { 3002 if_lock(t); 3003 3004 while (thread_is_running(t)) { 3005 3006 if_unlock(t); 3007 3008 msleep_interruptible(100); 3009 3010 if (signal_pending(current)) 3011 goto signal; 3012 if_lock(t); 3013 } 3014 if_unlock(t); 3015 return 1; 3016 signal: 3017 return 0; 3018 } 3019 3020 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3021 { 3022 struct pktgen_thread *t; 3023 int sig = 1; 3024 3025 mutex_lock(&pktgen_thread_lock); 3026 3027 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3028 sig = pktgen_wait_thread_run(t); 3029 if (sig == 0) 3030 break; 3031 } 3032 3033 if (sig == 0) 3034 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3035 t->control |= (T_STOP); 3036 3037 mutex_unlock(&pktgen_thread_lock); 3038 return sig; 3039 } 3040 3041 static void pktgen_run_all_threads(struct pktgen_net *pn) 3042 { 3043 struct pktgen_thread *t; 3044 3045 func_enter(); 3046 3047 mutex_lock(&pktgen_thread_lock); 3048 3049 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3050 t->control |= (T_RUN); 3051 3052 mutex_unlock(&pktgen_thread_lock); 3053 3054 /* Propagate thread->control */ 3055 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3056 3057 pktgen_wait_all_threads_run(pn); 3058 } 3059 3060 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3061 { 3062 struct pktgen_thread *t; 3063 3064 func_enter(); 3065 3066 mutex_lock(&pktgen_thread_lock); 3067 3068 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3069 t->control |= (T_REMDEVALL); 3070 3071 mutex_unlock(&pktgen_thread_lock); 3072 3073 /* Propagate thread->control */ 3074 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3075 3076 pktgen_wait_all_threads_run(pn); 3077 } 3078 3079 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3080 { 3081 __u64 bps, mbps, pps; 3082 char *p = pkt_dev->result; 3083 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3084 pkt_dev->started_at); 3085 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3086 3087 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3088 (unsigned long long)ktime_to_us(elapsed), 3089 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3090 (unsigned long long)ktime_to_us(idle), 3091 (unsigned long long)pkt_dev->sofar, 3092 pkt_dev->cur_pkt_size, nr_frags); 3093 3094 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3095 ktime_to_ns(elapsed)); 3096 3097 bps = pps * 8 * pkt_dev->cur_pkt_size; 3098 3099 mbps = bps; 3100 do_div(mbps, 1000000); 3101 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3102 (unsigned long long)pps, 3103 (unsigned long long)mbps, 3104 (unsigned long long)bps, 3105 (unsigned long long)pkt_dev->errors); 3106 } 3107 3108 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3109 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3110 { 3111 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3112 3113 if (!pkt_dev->running) { 3114 pr_warning("interface: %s is already stopped\n", 3115 pkt_dev->odevname); 3116 return -EINVAL; 3117 } 3118 3119 kfree_skb(pkt_dev->skb); 3120 pkt_dev->skb = NULL; 3121 pkt_dev->stopped_at = ktime_get(); 3122 pkt_dev->running = 0; 3123 3124 show_results(pkt_dev, nr_frags); 3125 3126 return 0; 3127 } 3128 3129 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3130 { 3131 struct pktgen_dev *pkt_dev, *best = NULL; 3132 3133 if_lock(t); 3134 3135 list_for_each_entry(pkt_dev, &t->if_list, list) { 3136 if (!pkt_dev->running) 3137 continue; 3138 if (best == NULL) 3139 best = pkt_dev; 3140 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3141 best = pkt_dev; 3142 } 3143 if_unlock(t); 3144 return best; 3145 } 3146 3147 static void pktgen_stop(struct pktgen_thread *t) 3148 { 3149 struct pktgen_dev *pkt_dev; 3150 3151 func_enter(); 3152 3153 if_lock(t); 3154 3155 list_for_each_entry(pkt_dev, &t->if_list, list) { 3156 pktgen_stop_device(pkt_dev); 3157 } 3158 3159 if_unlock(t); 3160 } 3161 3162 /* 3163 * one of our devices needs to be removed - find it 3164 * and remove it 3165 */ 3166 static void pktgen_rem_one_if(struct pktgen_thread *t) 3167 { 3168 struct list_head *q, *n; 3169 struct pktgen_dev *cur; 3170 3171 func_enter(); 3172 3173 if_lock(t); 3174 3175 list_for_each_safe(q, n, &t->if_list) { 3176 cur = list_entry(q, struct pktgen_dev, list); 3177 3178 if (!cur->removal_mark) 3179 continue; 3180 3181 kfree_skb(cur->skb); 3182 cur->skb = NULL; 3183 3184 pktgen_remove_device(t, cur); 3185 3186 break; 3187 } 3188 3189 if_unlock(t); 3190 } 3191 3192 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3193 { 3194 struct list_head *q, *n; 3195 struct pktgen_dev *cur; 3196 3197 func_enter(); 3198 3199 /* Remove all devices, free mem */ 3200 3201 if_lock(t); 3202 3203 list_for_each_safe(q, n, &t->if_list) { 3204 cur = list_entry(q, struct pktgen_dev, list); 3205 3206 kfree_skb(cur->skb); 3207 cur->skb = NULL; 3208 3209 pktgen_remove_device(t, cur); 3210 } 3211 3212 if_unlock(t); 3213 } 3214 3215 static void pktgen_rem_thread(struct pktgen_thread *t) 3216 { 3217 /* Remove from the thread list */ 3218 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3219 } 3220 3221 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3222 { 3223 ktime_t idle_start = ktime_get(); 3224 schedule(); 3225 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3226 } 3227 3228 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3229 { 3230 ktime_t idle_start = ktime_get(); 3231 3232 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3233 if (signal_pending(current)) 3234 break; 3235 3236 if (need_resched()) 3237 pktgen_resched(pkt_dev); 3238 else 3239 cpu_relax(); 3240 } 3241 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3242 } 3243 3244 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3245 { 3246 struct net_device *odev = pkt_dev->odev; 3247 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3248 = odev->netdev_ops->ndo_start_xmit; 3249 struct netdev_queue *txq; 3250 u16 queue_map; 3251 int ret; 3252 3253 /* If device is offline, then don't send */ 3254 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3255 pktgen_stop_device(pkt_dev); 3256 return; 3257 } 3258 3259 /* This is max DELAY, this has special meaning of 3260 * "never transmit" 3261 */ 3262 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3263 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3264 return; 3265 } 3266 3267 /* If no skb or clone count exhausted then get new one */ 3268 if (!pkt_dev->skb || (pkt_dev->last_ok && 3269 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3270 /* build a new pkt */ 3271 kfree_skb(pkt_dev->skb); 3272 3273 pkt_dev->skb = fill_packet(odev, pkt_dev); 3274 if (pkt_dev->skb == NULL) { 3275 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3276 schedule(); 3277 pkt_dev->clone_count--; /* back out increment, OOM */ 3278 return; 3279 } 3280 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3281 pkt_dev->allocated_skbs++; 3282 pkt_dev->clone_count = 0; /* reset counter */ 3283 } 3284 3285 if (pkt_dev->delay && pkt_dev->last_ok) 3286 spin(pkt_dev, pkt_dev->next_tx); 3287 3288 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3289 txq = netdev_get_tx_queue(odev, queue_map); 3290 3291 __netif_tx_lock_bh(txq); 3292 3293 if (unlikely(netif_xmit_frozen_or_stopped(txq))) { 3294 ret = NETDEV_TX_BUSY; 3295 pkt_dev->last_ok = 0; 3296 goto unlock; 3297 } 3298 atomic_inc(&(pkt_dev->skb->users)); 3299 ret = (*xmit)(pkt_dev->skb, odev); 3300 3301 switch (ret) { 3302 case NETDEV_TX_OK: 3303 txq_trans_update(txq); 3304 pkt_dev->last_ok = 1; 3305 pkt_dev->sofar++; 3306 pkt_dev->seq_num++; 3307 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3308 break; 3309 case NET_XMIT_DROP: 3310 case NET_XMIT_CN: 3311 case NET_XMIT_POLICED: 3312 /* skb has been consumed */ 3313 pkt_dev->errors++; 3314 break; 3315 default: /* Drivers are not supposed to return other values! */ 3316 net_info_ratelimited("%s xmit error: %d\n", 3317 pkt_dev->odevname, ret); 3318 pkt_dev->errors++; 3319 /* fallthru */ 3320 case NETDEV_TX_LOCKED: 3321 case NETDEV_TX_BUSY: 3322 /* Retry it next time */ 3323 atomic_dec(&(pkt_dev->skb->users)); 3324 pkt_dev->last_ok = 0; 3325 } 3326 unlock: 3327 __netif_tx_unlock_bh(txq); 3328 3329 /* If pkt_dev->count is zero, then run forever */ 3330 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3331 pktgen_wait_for_skb(pkt_dev); 3332 3333 /* Done with this */ 3334 pktgen_stop_device(pkt_dev); 3335 } 3336 } 3337 3338 /* 3339 * Main loop of the thread goes here 3340 */ 3341 3342 static int pktgen_thread_worker(void *arg) 3343 { 3344 DEFINE_WAIT(wait); 3345 struct pktgen_thread *t = arg; 3346 struct pktgen_dev *pkt_dev = NULL; 3347 int cpu = t->cpu; 3348 3349 BUG_ON(smp_processor_id() != cpu); 3350 3351 init_waitqueue_head(&t->queue); 3352 complete(&t->start_done); 3353 3354 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3355 3356 set_current_state(TASK_INTERRUPTIBLE); 3357 3358 set_freezable(); 3359 3360 while (!kthread_should_stop()) { 3361 pkt_dev = next_to_run(t); 3362 3363 if (unlikely(!pkt_dev && t->control == 0)) { 3364 if (t->net->pktgen_exiting) 3365 break; 3366 wait_event_interruptible_timeout(t->queue, 3367 t->control != 0, 3368 HZ/10); 3369 try_to_freeze(); 3370 continue; 3371 } 3372 3373 __set_current_state(TASK_RUNNING); 3374 3375 if (likely(pkt_dev)) { 3376 pktgen_xmit(pkt_dev); 3377 3378 if (need_resched()) 3379 pktgen_resched(pkt_dev); 3380 else 3381 cpu_relax(); 3382 } 3383 3384 if (t->control & T_STOP) { 3385 pktgen_stop(t); 3386 t->control &= ~(T_STOP); 3387 } 3388 3389 if (t->control & T_RUN) { 3390 pktgen_run(t); 3391 t->control &= ~(T_RUN); 3392 } 3393 3394 if (t->control & T_REMDEVALL) { 3395 pktgen_rem_all_ifs(t); 3396 t->control &= ~(T_REMDEVALL); 3397 } 3398 3399 if (t->control & T_REMDEV) { 3400 pktgen_rem_one_if(t); 3401 t->control &= ~(T_REMDEV); 3402 } 3403 3404 try_to_freeze(); 3405 3406 set_current_state(TASK_INTERRUPTIBLE); 3407 } 3408 3409 pr_debug("%s stopping all device\n", t->tsk->comm); 3410 pktgen_stop(t); 3411 3412 pr_debug("%s removing all device\n", t->tsk->comm); 3413 pktgen_rem_all_ifs(t); 3414 3415 pr_debug("%s removing thread\n", t->tsk->comm); 3416 pktgen_rem_thread(t); 3417 3418 /* Wait for kthread_stop */ 3419 while (!kthread_should_stop()) { 3420 set_current_state(TASK_INTERRUPTIBLE); 3421 schedule(); 3422 } 3423 __set_current_state(TASK_RUNNING); 3424 3425 return 0; 3426 } 3427 3428 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3429 const char *ifname, bool exact) 3430 { 3431 struct pktgen_dev *p, *pkt_dev = NULL; 3432 size_t len = strlen(ifname); 3433 3434 if_lock(t); 3435 list_for_each_entry(p, &t->if_list, list) 3436 if (strncmp(p->odevname, ifname, len) == 0) { 3437 if (p->odevname[len]) { 3438 if (exact || p->odevname[len] != '@') 3439 continue; 3440 } 3441 pkt_dev = p; 3442 break; 3443 } 3444 3445 if_unlock(t); 3446 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3447 return pkt_dev; 3448 } 3449 3450 /* 3451 * Adds a dev at front of if_list. 3452 */ 3453 3454 static int add_dev_to_thread(struct pktgen_thread *t, 3455 struct pktgen_dev *pkt_dev) 3456 { 3457 int rv = 0; 3458 3459 if_lock(t); 3460 3461 if (pkt_dev->pg_thread) { 3462 pr_err("ERROR: already assigned to a thread\n"); 3463 rv = -EBUSY; 3464 goto out; 3465 } 3466 3467 list_add(&pkt_dev->list, &t->if_list); 3468 pkt_dev->pg_thread = t; 3469 pkt_dev->running = 0; 3470 3471 out: 3472 if_unlock(t); 3473 return rv; 3474 } 3475 3476 /* Called under thread lock */ 3477 3478 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3479 { 3480 struct pktgen_dev *pkt_dev; 3481 int err; 3482 int node = cpu_to_node(t->cpu); 3483 3484 /* We don't allow a device to be on several threads */ 3485 3486 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3487 if (pkt_dev) { 3488 pr_err("ERROR: interface already used\n"); 3489 return -EBUSY; 3490 } 3491 3492 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3493 if (!pkt_dev) 3494 return -ENOMEM; 3495 3496 strcpy(pkt_dev->odevname, ifname); 3497 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3498 node); 3499 if (pkt_dev->flows == NULL) { 3500 kfree(pkt_dev); 3501 return -ENOMEM; 3502 } 3503 3504 pkt_dev->removal_mark = 0; 3505 pkt_dev->nfrags = 0; 3506 pkt_dev->delay = pg_delay_d; 3507 pkt_dev->count = pg_count_d; 3508 pkt_dev->sofar = 0; 3509 pkt_dev->udp_src_min = 9; /* sink port */ 3510 pkt_dev->udp_src_max = 9; 3511 pkt_dev->udp_dst_min = 9; 3512 pkt_dev->udp_dst_max = 9; 3513 pkt_dev->vlan_p = 0; 3514 pkt_dev->vlan_cfi = 0; 3515 pkt_dev->vlan_id = 0xffff; 3516 pkt_dev->svlan_p = 0; 3517 pkt_dev->svlan_cfi = 0; 3518 pkt_dev->svlan_id = 0xffff; 3519 pkt_dev->node = -1; 3520 3521 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3522 if (err) 3523 goto out1; 3524 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3525 pkt_dev->clone_skb = pg_clone_skb_d; 3526 3527 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3528 &pktgen_if_fops, pkt_dev); 3529 if (!pkt_dev->entry) { 3530 pr_err("cannot create %s/%s procfs entry\n", 3531 PG_PROC_DIR, ifname); 3532 err = -EINVAL; 3533 goto out2; 3534 } 3535 #ifdef CONFIG_XFRM 3536 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3537 pkt_dev->ipsproto = IPPROTO_ESP; 3538 #endif 3539 3540 return add_dev_to_thread(t, pkt_dev); 3541 out2: 3542 dev_put(pkt_dev->odev); 3543 out1: 3544 #ifdef CONFIG_XFRM 3545 free_SAs(pkt_dev); 3546 #endif 3547 vfree(pkt_dev->flows); 3548 kfree(pkt_dev); 3549 return err; 3550 } 3551 3552 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3553 { 3554 struct pktgen_thread *t; 3555 struct proc_dir_entry *pe; 3556 struct task_struct *p; 3557 3558 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3559 cpu_to_node(cpu)); 3560 if (!t) { 3561 pr_err("ERROR: out of memory, can't create new thread\n"); 3562 return -ENOMEM; 3563 } 3564 3565 spin_lock_init(&t->if_lock); 3566 t->cpu = cpu; 3567 3568 INIT_LIST_HEAD(&t->if_list); 3569 3570 list_add_tail(&t->th_list, &pn->pktgen_threads); 3571 init_completion(&t->start_done); 3572 3573 p = kthread_create_on_node(pktgen_thread_worker, 3574 t, 3575 cpu_to_node(cpu), 3576 "kpktgend_%d", cpu); 3577 if (IS_ERR(p)) { 3578 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3579 list_del(&t->th_list); 3580 kfree(t); 3581 return PTR_ERR(p); 3582 } 3583 kthread_bind(p, cpu); 3584 t->tsk = p; 3585 3586 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3587 &pktgen_thread_fops, t); 3588 if (!pe) { 3589 pr_err("cannot create %s/%s procfs entry\n", 3590 PG_PROC_DIR, t->tsk->comm); 3591 kthread_stop(p); 3592 list_del(&t->th_list); 3593 kfree(t); 3594 return -EINVAL; 3595 } 3596 3597 t->net = pn; 3598 wake_up_process(p); 3599 wait_for_completion(&t->start_done); 3600 3601 return 0; 3602 } 3603 3604 /* 3605 * Removes a device from the thread if_list. 3606 */ 3607 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3608 struct pktgen_dev *pkt_dev) 3609 { 3610 struct list_head *q, *n; 3611 struct pktgen_dev *p; 3612 3613 list_for_each_safe(q, n, &t->if_list) { 3614 p = list_entry(q, struct pktgen_dev, list); 3615 if (p == pkt_dev) 3616 list_del(&p->list); 3617 } 3618 } 3619 3620 static int pktgen_remove_device(struct pktgen_thread *t, 3621 struct pktgen_dev *pkt_dev) 3622 { 3623 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3624 3625 if (pkt_dev->running) { 3626 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3627 pktgen_stop_device(pkt_dev); 3628 } 3629 3630 /* Dis-associate from the interface */ 3631 3632 if (pkt_dev->odev) { 3633 dev_put(pkt_dev->odev); 3634 pkt_dev->odev = NULL; 3635 } 3636 3637 /* And update the thread if_list */ 3638 3639 _rem_dev_from_if_list(t, pkt_dev); 3640 3641 if (pkt_dev->entry) 3642 proc_remove(pkt_dev->entry); 3643 3644 #ifdef CONFIG_XFRM 3645 free_SAs(pkt_dev); 3646 #endif 3647 vfree(pkt_dev->flows); 3648 if (pkt_dev->page) 3649 put_page(pkt_dev->page); 3650 kfree(pkt_dev); 3651 return 0; 3652 } 3653 3654 static int __net_init pg_net_init(struct net *net) 3655 { 3656 struct pktgen_net *pn = net_generic(net, pg_net_id); 3657 struct proc_dir_entry *pe; 3658 int cpu, ret = 0; 3659 3660 pn->net = net; 3661 INIT_LIST_HEAD(&pn->pktgen_threads); 3662 pn->pktgen_exiting = false; 3663 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3664 if (!pn->proc_dir) { 3665 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3666 return -ENODEV; 3667 } 3668 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3669 if (pe == NULL) { 3670 pr_err("cannot create %s procfs entry\n", PGCTRL); 3671 ret = -EINVAL; 3672 goto remove; 3673 } 3674 3675 for_each_online_cpu(cpu) { 3676 int err; 3677 3678 err = pktgen_create_thread(cpu, pn); 3679 if (err) 3680 pr_warn("Cannot create thread for cpu %d (%d)\n", 3681 cpu, err); 3682 } 3683 3684 if (list_empty(&pn->pktgen_threads)) { 3685 pr_err("Initialization failed for all threads\n"); 3686 ret = -ENODEV; 3687 goto remove_entry; 3688 } 3689 3690 return 0; 3691 3692 remove_entry: 3693 remove_proc_entry(PGCTRL, pn->proc_dir); 3694 remove: 3695 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3696 return ret; 3697 } 3698 3699 static void __net_exit pg_net_exit(struct net *net) 3700 { 3701 struct pktgen_net *pn = net_generic(net, pg_net_id); 3702 struct pktgen_thread *t; 3703 struct list_head *q, *n; 3704 LIST_HEAD(list); 3705 3706 /* Stop all interfaces & threads */ 3707 pn->pktgen_exiting = true; 3708 3709 mutex_lock(&pktgen_thread_lock); 3710 list_splice_init(&pn->pktgen_threads, &list); 3711 mutex_unlock(&pktgen_thread_lock); 3712 3713 list_for_each_safe(q, n, &list) { 3714 t = list_entry(q, struct pktgen_thread, th_list); 3715 list_del(&t->th_list); 3716 kthread_stop(t->tsk); 3717 kfree(t); 3718 } 3719 3720 remove_proc_entry(PGCTRL, pn->proc_dir); 3721 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3722 } 3723 3724 static struct pernet_operations pg_net_ops = { 3725 .init = pg_net_init, 3726 .exit = pg_net_exit, 3727 .id = &pg_net_id, 3728 .size = sizeof(struct pktgen_net), 3729 }; 3730 3731 static int __init pg_init(void) 3732 { 3733 int ret = 0; 3734 3735 pr_info("%s", version); 3736 ret = register_pernet_subsys(&pg_net_ops); 3737 if (ret) 3738 return ret; 3739 ret = register_netdevice_notifier(&pktgen_notifier_block); 3740 if (ret) 3741 unregister_pernet_subsys(&pg_net_ops); 3742 3743 return ret; 3744 } 3745 3746 static void __exit pg_cleanup(void) 3747 { 3748 unregister_netdevice_notifier(&pktgen_notifier_block); 3749 unregister_pernet_subsys(&pg_net_ops); 3750 } 3751 3752 module_init(pg_init); 3753 module_exit(pg_cleanup); 3754 3755 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3756 MODULE_DESCRIPTION("Packet Generator tool"); 3757 MODULE_LICENSE("GPL"); 3758 MODULE_VERSION(VERSION); 3759 module_param(pg_count_d, int, 0); 3760 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3761 module_param(pg_delay_d, int, 0); 3762 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3763 module_param(pg_clone_skb_d, int, 0); 3764 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3765 module_param(debug, int, 0); 3766 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3767