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