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, " 1251 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " 1252 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " 1253 #ifdef CONFIG_XFRM 1254 "IPSEC, " 1255 #endif 1256 "NODE_ALLOC\n"); 1257 return count; 1258 } 1259 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1260 return count; 1261 } 1262 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1263 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1264 if (len < 0) 1265 return len; 1266 1267 if (copy_from_user(buf, &user_buffer[i], len)) 1268 return -EFAULT; 1269 buf[len] = 0; 1270 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1271 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1272 strncpy(pkt_dev->dst_min, buf, len); 1273 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1274 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1275 } 1276 if (debug) 1277 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1278 i += len; 1279 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1280 return count; 1281 } 1282 if (!strcmp(name, "dst_max")) { 1283 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1284 if (len < 0) 1285 return len; 1286 1287 1288 if (copy_from_user(buf, &user_buffer[i], len)) 1289 return -EFAULT; 1290 1291 buf[len] = 0; 1292 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1293 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1294 strncpy(pkt_dev->dst_max, buf, len); 1295 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1296 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1297 } 1298 if (debug) 1299 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1300 i += len; 1301 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1302 return count; 1303 } 1304 if (!strcmp(name, "dst6")) { 1305 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1306 if (len < 0) 1307 return len; 1308 1309 pkt_dev->flags |= F_IPV6; 1310 1311 if (copy_from_user(buf, &user_buffer[i], len)) 1312 return -EFAULT; 1313 buf[len] = 0; 1314 1315 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1316 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1317 1318 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1319 1320 if (debug) 1321 pr_debug("dst6 set to: %s\n", buf); 1322 1323 i += len; 1324 sprintf(pg_result, "OK: dst6=%s", buf); 1325 return count; 1326 } 1327 if (!strcmp(name, "dst6_min")) { 1328 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1329 if (len < 0) 1330 return len; 1331 1332 pkt_dev->flags |= F_IPV6; 1333 1334 if (copy_from_user(buf, &user_buffer[i], len)) 1335 return -EFAULT; 1336 buf[len] = 0; 1337 1338 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1339 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1340 1341 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1342 if (debug) 1343 pr_debug("dst6_min set to: %s\n", buf); 1344 1345 i += len; 1346 sprintf(pg_result, "OK: dst6_min=%s", buf); 1347 return count; 1348 } 1349 if (!strcmp(name, "dst6_max")) { 1350 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1351 if (len < 0) 1352 return len; 1353 1354 pkt_dev->flags |= F_IPV6; 1355 1356 if (copy_from_user(buf, &user_buffer[i], len)) 1357 return -EFAULT; 1358 buf[len] = 0; 1359 1360 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1361 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1362 1363 if (debug) 1364 pr_debug("dst6_max set to: %s\n", buf); 1365 1366 i += len; 1367 sprintf(pg_result, "OK: dst6_max=%s", buf); 1368 return count; 1369 } 1370 if (!strcmp(name, "src6")) { 1371 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1372 if (len < 0) 1373 return len; 1374 1375 pkt_dev->flags |= F_IPV6; 1376 1377 if (copy_from_user(buf, &user_buffer[i], len)) 1378 return -EFAULT; 1379 buf[len] = 0; 1380 1381 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1382 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1383 1384 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1385 1386 if (debug) 1387 pr_debug("src6 set to: %s\n", buf); 1388 1389 i += len; 1390 sprintf(pg_result, "OK: src6=%s", buf); 1391 return count; 1392 } 1393 if (!strcmp(name, "src_min")) { 1394 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1395 if (len < 0) 1396 return len; 1397 1398 if (copy_from_user(buf, &user_buffer[i], len)) 1399 return -EFAULT; 1400 buf[len] = 0; 1401 if (strcmp(buf, pkt_dev->src_min) != 0) { 1402 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1403 strncpy(pkt_dev->src_min, buf, len); 1404 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1405 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1406 } 1407 if (debug) 1408 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1409 i += len; 1410 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1411 return count; 1412 } 1413 if (!strcmp(name, "src_max")) { 1414 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1415 if (len < 0) 1416 return len; 1417 1418 if (copy_from_user(buf, &user_buffer[i], len)) 1419 return -EFAULT; 1420 buf[len] = 0; 1421 if (strcmp(buf, pkt_dev->src_max) != 0) { 1422 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1423 strncpy(pkt_dev->src_max, buf, len); 1424 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1425 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1426 } 1427 if (debug) 1428 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1429 i += len; 1430 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1431 return count; 1432 } 1433 if (!strcmp(name, "dst_mac")) { 1434 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1435 if (len < 0) 1436 return len; 1437 1438 memset(valstr, 0, sizeof(valstr)); 1439 if (copy_from_user(valstr, &user_buffer[i], len)) 1440 return -EFAULT; 1441 1442 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1443 return -EINVAL; 1444 /* Set up Dest MAC */ 1445 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); 1446 1447 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1448 return count; 1449 } 1450 if (!strcmp(name, "src_mac")) { 1451 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1452 if (len < 0) 1453 return len; 1454 1455 memset(valstr, 0, sizeof(valstr)); 1456 if (copy_from_user(valstr, &user_buffer[i], len)) 1457 return -EFAULT; 1458 1459 if (!mac_pton(valstr, pkt_dev->src_mac)) 1460 return -EINVAL; 1461 /* Set up Src MAC */ 1462 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); 1463 1464 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1465 return count; 1466 } 1467 1468 if (!strcmp(name, "clear_counters")) { 1469 pktgen_clear_counters(pkt_dev); 1470 sprintf(pg_result, "OK: Clearing counters.\n"); 1471 return count; 1472 } 1473 1474 if (!strcmp(name, "flows")) { 1475 len = num_arg(&user_buffer[i], 10, &value); 1476 if (len < 0) 1477 return len; 1478 1479 i += len; 1480 if (value > MAX_CFLOWS) 1481 value = MAX_CFLOWS; 1482 1483 pkt_dev->cflows = value; 1484 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1485 return count; 1486 } 1487 #ifdef CONFIG_XFRM 1488 if (!strcmp(name, "spi")) { 1489 len = num_arg(&user_buffer[i], 10, &value); 1490 if (len < 0) 1491 return len; 1492 1493 i += len; 1494 pkt_dev->spi = value; 1495 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); 1496 return count; 1497 } 1498 #endif 1499 if (!strcmp(name, "flowlen")) { 1500 len = num_arg(&user_buffer[i], 10, &value); 1501 if (len < 0) 1502 return len; 1503 1504 i += len; 1505 pkt_dev->lflow = value; 1506 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1507 return count; 1508 } 1509 1510 if (!strcmp(name, "queue_map_min")) { 1511 len = num_arg(&user_buffer[i], 5, &value); 1512 if (len < 0) 1513 return len; 1514 1515 i += len; 1516 pkt_dev->queue_map_min = value; 1517 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1518 return count; 1519 } 1520 1521 if (!strcmp(name, "queue_map_max")) { 1522 len = num_arg(&user_buffer[i], 5, &value); 1523 if (len < 0) 1524 return len; 1525 1526 i += len; 1527 pkt_dev->queue_map_max = value; 1528 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1529 return count; 1530 } 1531 1532 if (!strcmp(name, "mpls")) { 1533 unsigned int n, cnt; 1534 1535 len = get_labels(&user_buffer[i], pkt_dev); 1536 if (len < 0) 1537 return len; 1538 i += len; 1539 cnt = sprintf(pg_result, "OK: mpls="); 1540 for (n = 0; n < pkt_dev->nr_labels; n++) 1541 cnt += sprintf(pg_result + cnt, 1542 "%08x%s", ntohl(pkt_dev->labels[n]), 1543 n == pkt_dev->nr_labels-1 ? "" : ","); 1544 1545 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1546 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1547 pkt_dev->svlan_id = 0xffff; 1548 1549 if (debug) 1550 pr_debug("VLAN/SVLAN auto turned off\n"); 1551 } 1552 return count; 1553 } 1554 1555 if (!strcmp(name, "vlan_id")) { 1556 len = num_arg(&user_buffer[i], 4, &value); 1557 if (len < 0) 1558 return len; 1559 1560 i += len; 1561 if (value <= 4095) { 1562 pkt_dev->vlan_id = value; /* turn on VLAN */ 1563 1564 if (debug) 1565 pr_debug("VLAN turned on\n"); 1566 1567 if (debug && pkt_dev->nr_labels) 1568 pr_debug("MPLS auto turned off\n"); 1569 1570 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1571 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1572 } else { 1573 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1574 pkt_dev->svlan_id = 0xffff; 1575 1576 if (debug) 1577 pr_debug("VLAN/SVLAN turned off\n"); 1578 } 1579 return count; 1580 } 1581 1582 if (!strcmp(name, "vlan_p")) { 1583 len = num_arg(&user_buffer[i], 1, &value); 1584 if (len < 0) 1585 return len; 1586 1587 i += len; 1588 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1589 pkt_dev->vlan_p = value; 1590 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1591 } else { 1592 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1593 } 1594 return count; 1595 } 1596 1597 if (!strcmp(name, "vlan_cfi")) { 1598 len = num_arg(&user_buffer[i], 1, &value); 1599 if (len < 0) 1600 return len; 1601 1602 i += len; 1603 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1604 pkt_dev->vlan_cfi = value; 1605 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1606 } else { 1607 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1608 } 1609 return count; 1610 } 1611 1612 if (!strcmp(name, "svlan_id")) { 1613 len = num_arg(&user_buffer[i], 4, &value); 1614 if (len < 0) 1615 return len; 1616 1617 i += len; 1618 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1619 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1620 1621 if (debug) 1622 pr_debug("SVLAN turned on\n"); 1623 1624 if (debug && pkt_dev->nr_labels) 1625 pr_debug("MPLS auto turned off\n"); 1626 1627 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1628 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1629 } else { 1630 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1631 pkt_dev->svlan_id = 0xffff; 1632 1633 if (debug) 1634 pr_debug("VLAN/SVLAN turned off\n"); 1635 } 1636 return count; 1637 } 1638 1639 if (!strcmp(name, "svlan_p")) { 1640 len = num_arg(&user_buffer[i], 1, &value); 1641 if (len < 0) 1642 return len; 1643 1644 i += len; 1645 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1646 pkt_dev->svlan_p = value; 1647 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1648 } else { 1649 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1650 } 1651 return count; 1652 } 1653 1654 if (!strcmp(name, "svlan_cfi")) { 1655 len = num_arg(&user_buffer[i], 1, &value); 1656 if (len < 0) 1657 return len; 1658 1659 i += len; 1660 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1661 pkt_dev->svlan_cfi = value; 1662 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1663 } else { 1664 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1665 } 1666 return count; 1667 } 1668 1669 if (!strcmp(name, "tos")) { 1670 __u32 tmp_value = 0; 1671 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1672 if (len < 0) 1673 return len; 1674 1675 i += len; 1676 if (len == 2) { 1677 pkt_dev->tos = tmp_value; 1678 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1679 } else { 1680 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1681 } 1682 return count; 1683 } 1684 1685 if (!strcmp(name, "traffic_class")) { 1686 __u32 tmp_value = 0; 1687 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1688 if (len < 0) 1689 return len; 1690 1691 i += len; 1692 if (len == 2) { 1693 pkt_dev->traffic_class = tmp_value; 1694 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1695 } else { 1696 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1697 } 1698 return count; 1699 } 1700 1701 if (!strcmp(name, "skb_priority")) { 1702 len = num_arg(&user_buffer[i], 9, &value); 1703 if (len < 0) 1704 return len; 1705 1706 i += len; 1707 pkt_dev->skb_priority = value; 1708 sprintf(pg_result, "OK: skb_priority=%i", 1709 pkt_dev->skb_priority); 1710 return count; 1711 } 1712 1713 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1714 return -EINVAL; 1715 } 1716 1717 static int pktgen_if_open(struct inode *inode, struct file *file) 1718 { 1719 return single_open(file, pktgen_if_show, PDE_DATA(inode)); 1720 } 1721 1722 static const struct file_operations pktgen_if_fops = { 1723 .owner = THIS_MODULE, 1724 .open = pktgen_if_open, 1725 .read = seq_read, 1726 .llseek = seq_lseek, 1727 .write = pktgen_if_write, 1728 .release = single_release, 1729 }; 1730 1731 static int pktgen_thread_show(struct seq_file *seq, void *v) 1732 { 1733 struct pktgen_thread *t = seq->private; 1734 const struct pktgen_dev *pkt_dev; 1735 1736 BUG_ON(!t); 1737 1738 seq_printf(seq, "Running: "); 1739 1740 if_lock(t); 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 seq_printf(seq, "\nStopped: "); 1746 1747 list_for_each_entry(pkt_dev, &t->if_list, list) 1748 if (!pkt_dev->running) 1749 seq_printf(seq, "%s ", pkt_dev->odevname); 1750 1751 if (t->result[0]) 1752 seq_printf(seq, "\nResult: %s\n", t->result); 1753 else 1754 seq_printf(seq, "\nResult: NA\n"); 1755 1756 if_unlock(t); 1757 1758 return 0; 1759 } 1760 1761 static ssize_t pktgen_thread_write(struct file *file, 1762 const char __user * user_buffer, 1763 size_t count, loff_t * offset) 1764 { 1765 struct seq_file *seq = file->private_data; 1766 struct pktgen_thread *t = seq->private; 1767 int i, max, len, ret; 1768 char name[40]; 1769 char *pg_result; 1770 1771 if (count < 1) { 1772 // sprintf(pg_result, "Wrong command format"); 1773 return -EINVAL; 1774 } 1775 1776 max = count; 1777 len = count_trail_chars(user_buffer, max); 1778 if (len < 0) 1779 return len; 1780 1781 i = len; 1782 1783 /* Read variable name */ 1784 1785 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1786 if (len < 0) 1787 return len; 1788 1789 memset(name, 0, sizeof(name)); 1790 if (copy_from_user(name, &user_buffer[i], len)) 1791 return -EFAULT; 1792 i += len; 1793 1794 max = count - i; 1795 len = count_trail_chars(&user_buffer[i], max); 1796 if (len < 0) 1797 return len; 1798 1799 i += len; 1800 1801 if (debug) 1802 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1803 1804 if (!t) { 1805 pr_err("ERROR: No thread\n"); 1806 ret = -EINVAL; 1807 goto out; 1808 } 1809 1810 pg_result = &(t->result[0]); 1811 1812 if (!strcmp(name, "add_device")) { 1813 char f[32]; 1814 memset(f, 0, 32); 1815 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1816 if (len < 0) { 1817 ret = len; 1818 goto out; 1819 } 1820 if (copy_from_user(f, &user_buffer[i], len)) 1821 return -EFAULT; 1822 i += len; 1823 mutex_lock(&pktgen_thread_lock); 1824 ret = pktgen_add_device(t, f); 1825 mutex_unlock(&pktgen_thread_lock); 1826 if (!ret) { 1827 ret = count; 1828 sprintf(pg_result, "OK: add_device=%s", f); 1829 } else 1830 sprintf(pg_result, "ERROR: can not add device %s", f); 1831 goto out; 1832 } 1833 1834 if (!strcmp(name, "rem_device_all")) { 1835 mutex_lock(&pktgen_thread_lock); 1836 t->control |= T_REMDEVALL; 1837 mutex_unlock(&pktgen_thread_lock); 1838 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1839 ret = count; 1840 sprintf(pg_result, "OK: rem_device_all"); 1841 goto out; 1842 } 1843 1844 if (!strcmp(name, "max_before_softirq")) { 1845 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1846 ret = count; 1847 goto out; 1848 } 1849 1850 ret = -EINVAL; 1851 out: 1852 return ret; 1853 } 1854 1855 static int pktgen_thread_open(struct inode *inode, struct file *file) 1856 { 1857 return single_open(file, pktgen_thread_show, PDE_DATA(inode)); 1858 } 1859 1860 static const struct file_operations pktgen_thread_fops = { 1861 .owner = THIS_MODULE, 1862 .open = pktgen_thread_open, 1863 .read = seq_read, 1864 .llseek = seq_lseek, 1865 .write = pktgen_thread_write, 1866 .release = single_release, 1867 }; 1868 1869 /* Think find or remove for NN */ 1870 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 1871 const char *ifname, int remove) 1872 { 1873 struct pktgen_thread *t; 1874 struct pktgen_dev *pkt_dev = NULL; 1875 bool exact = (remove == FIND); 1876 1877 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1878 pkt_dev = pktgen_find_dev(t, ifname, exact); 1879 if (pkt_dev) { 1880 if (remove) { 1881 if_lock(t); 1882 pkt_dev->removal_mark = 1; 1883 t->control |= T_REMDEV; 1884 if_unlock(t); 1885 } 1886 break; 1887 } 1888 } 1889 return pkt_dev; 1890 } 1891 1892 /* 1893 * mark a device for removal 1894 */ 1895 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1896 { 1897 struct pktgen_dev *pkt_dev = NULL; 1898 const int max_tries = 10, msec_per_try = 125; 1899 int i = 0; 1900 1901 mutex_lock(&pktgen_thread_lock); 1902 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1903 1904 while (1) { 1905 1906 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1907 if (pkt_dev == NULL) 1908 break; /* success */ 1909 1910 mutex_unlock(&pktgen_thread_lock); 1911 pr_debug("%s: waiting for %s to disappear....\n", 1912 __func__, ifname); 1913 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1914 mutex_lock(&pktgen_thread_lock); 1915 1916 if (++i >= max_tries) { 1917 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1918 __func__, msec_per_try * i, ifname); 1919 break; 1920 } 1921 1922 } 1923 1924 mutex_unlock(&pktgen_thread_lock); 1925 } 1926 1927 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 1928 { 1929 struct pktgen_thread *t; 1930 1931 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1932 struct pktgen_dev *pkt_dev; 1933 1934 list_for_each_entry(pkt_dev, &t->if_list, list) { 1935 if (pkt_dev->odev != dev) 1936 continue; 1937 1938 proc_remove(pkt_dev->entry); 1939 1940 pkt_dev->entry = proc_create_data(dev->name, 0600, 1941 pn->proc_dir, 1942 &pktgen_if_fops, 1943 pkt_dev); 1944 if (!pkt_dev->entry) 1945 pr_err("can't move proc entry for '%s'\n", 1946 dev->name); 1947 break; 1948 } 1949 } 1950 } 1951 1952 static int pktgen_device_event(struct notifier_block *unused, 1953 unsigned long event, void *ptr) 1954 { 1955 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1956 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 1957 1958 if (pn->pktgen_exiting) 1959 return NOTIFY_DONE; 1960 1961 /* It is OK that we do not hold the group lock right now, 1962 * as we run under the RTNL lock. 1963 */ 1964 1965 switch (event) { 1966 case NETDEV_CHANGENAME: 1967 pktgen_change_name(pn, dev); 1968 break; 1969 1970 case NETDEV_UNREGISTER: 1971 pktgen_mark_device(pn, dev->name); 1972 break; 1973 } 1974 1975 return NOTIFY_DONE; 1976 } 1977 1978 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 1979 struct pktgen_dev *pkt_dev, 1980 const char *ifname) 1981 { 1982 char b[IFNAMSIZ+5]; 1983 int i; 1984 1985 for (i = 0; ifname[i] != '@'; i++) { 1986 if (i == IFNAMSIZ) 1987 break; 1988 1989 b[i] = ifname[i]; 1990 } 1991 b[i] = 0; 1992 1993 return dev_get_by_name(pn->net, b); 1994 } 1995 1996 1997 /* Associate pktgen_dev with a device. */ 1998 1999 static int pktgen_setup_dev(const struct pktgen_net *pn, 2000 struct pktgen_dev *pkt_dev, const char *ifname) 2001 { 2002 struct net_device *odev; 2003 int err; 2004 2005 /* Clean old setups */ 2006 if (pkt_dev->odev) { 2007 dev_put(pkt_dev->odev); 2008 pkt_dev->odev = NULL; 2009 } 2010 2011 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 2012 if (!odev) { 2013 pr_err("no such netdevice: \"%s\"\n", ifname); 2014 return -ENODEV; 2015 } 2016 2017 if (odev->type != ARPHRD_ETHER) { 2018 pr_err("not an ethernet device: \"%s\"\n", ifname); 2019 err = -EINVAL; 2020 } else if (!netif_running(odev)) { 2021 pr_err("device is down: \"%s\"\n", ifname); 2022 err = -ENETDOWN; 2023 } else { 2024 pkt_dev->odev = odev; 2025 return 0; 2026 } 2027 2028 dev_put(odev); 2029 return err; 2030 } 2031 2032 /* Read pkt_dev from the interface and set up internal pktgen_dev 2033 * structure to have the right information to create/send packets 2034 */ 2035 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2036 { 2037 int ntxq; 2038 2039 if (!pkt_dev->odev) { 2040 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2041 sprintf(pkt_dev->result, 2042 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2043 return; 2044 } 2045 2046 /* make sure that we don't pick a non-existing transmit queue */ 2047 ntxq = pkt_dev->odev->real_num_tx_queues; 2048 2049 if (ntxq <= pkt_dev->queue_map_min) { 2050 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2051 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2052 pkt_dev->odevname); 2053 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2054 } 2055 if (pkt_dev->queue_map_max >= ntxq) { 2056 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2057 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2058 pkt_dev->odevname); 2059 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2060 } 2061 2062 /* Default to the interface's mac if not explicitly set. */ 2063 2064 if (is_zero_ether_addr(pkt_dev->src_mac)) 2065 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); 2066 2067 /* Set up Dest MAC */ 2068 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); 2069 2070 if (pkt_dev->flags & F_IPV6) { 2071 int i, set = 0, err = 1; 2072 struct inet6_dev *idev; 2073 2074 if (pkt_dev->min_pkt_size == 0) { 2075 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2076 + sizeof(struct udphdr) 2077 + sizeof(struct pktgen_hdr) 2078 + pkt_dev->pkt_overhead; 2079 } 2080 2081 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2082 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2083 set = 1; 2084 break; 2085 } 2086 2087 if (!set) { 2088 2089 /* 2090 * Use linklevel address if unconfigured. 2091 * 2092 * use ipv6_get_lladdr if/when it's get exported 2093 */ 2094 2095 rcu_read_lock(); 2096 idev = __in6_dev_get(pkt_dev->odev); 2097 if (idev) { 2098 struct inet6_ifaddr *ifp; 2099 2100 read_lock_bh(&idev->lock); 2101 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2102 if ((ifp->scope & IFA_LINK) && 2103 !(ifp->flags & IFA_F_TENTATIVE)) { 2104 pkt_dev->cur_in6_saddr = ifp->addr; 2105 err = 0; 2106 break; 2107 } 2108 } 2109 read_unlock_bh(&idev->lock); 2110 } 2111 rcu_read_unlock(); 2112 if (err) 2113 pr_err("ERROR: IPv6 link address not available\n"); 2114 } 2115 } else { 2116 if (pkt_dev->min_pkt_size == 0) { 2117 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2118 + sizeof(struct udphdr) 2119 + sizeof(struct pktgen_hdr) 2120 + pkt_dev->pkt_overhead; 2121 } 2122 2123 pkt_dev->saddr_min = 0; 2124 pkt_dev->saddr_max = 0; 2125 if (strlen(pkt_dev->src_min) == 0) { 2126 2127 struct in_device *in_dev; 2128 2129 rcu_read_lock(); 2130 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2131 if (in_dev) { 2132 if (in_dev->ifa_list) { 2133 pkt_dev->saddr_min = 2134 in_dev->ifa_list->ifa_address; 2135 pkt_dev->saddr_max = pkt_dev->saddr_min; 2136 } 2137 } 2138 rcu_read_unlock(); 2139 } else { 2140 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2141 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2142 } 2143 2144 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2145 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2146 } 2147 /* Initialize current values. */ 2148 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2149 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2150 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2151 2152 pkt_dev->cur_dst_mac_offset = 0; 2153 pkt_dev->cur_src_mac_offset = 0; 2154 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2155 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2156 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2157 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2158 pkt_dev->nflows = 0; 2159 } 2160 2161 2162 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2163 { 2164 ktime_t start_time, end_time; 2165 s64 remaining; 2166 struct hrtimer_sleeper t; 2167 2168 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2169 hrtimer_set_expires(&t.timer, spin_until); 2170 2171 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2172 if (remaining <= 0) { 2173 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2174 return; 2175 } 2176 2177 start_time = ktime_get(); 2178 if (remaining < 100000) { 2179 /* for small delays (<100us), just loop until limit is reached */ 2180 do { 2181 end_time = ktime_get(); 2182 } while (ktime_compare(end_time, spin_until) < 0); 2183 } else { 2184 /* see do_nanosleep */ 2185 hrtimer_init_sleeper(&t, current); 2186 do { 2187 set_current_state(TASK_INTERRUPTIBLE); 2188 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2189 if (!hrtimer_active(&t.timer)) 2190 t.task = NULL; 2191 2192 if (likely(t.task)) 2193 schedule(); 2194 2195 hrtimer_cancel(&t.timer); 2196 } while (t.task && pkt_dev->running && !signal_pending(current)); 2197 __set_current_state(TASK_RUNNING); 2198 end_time = ktime_get(); 2199 } 2200 2201 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2202 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2203 } 2204 2205 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2206 { 2207 pkt_dev->pkt_overhead = 0; 2208 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2209 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2210 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2211 } 2212 2213 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2214 { 2215 return !!(pkt_dev->flows[flow].flags & F_INIT); 2216 } 2217 2218 static inline int f_pick(struct pktgen_dev *pkt_dev) 2219 { 2220 int flow = pkt_dev->curfl; 2221 2222 if (pkt_dev->flags & F_FLOW_SEQ) { 2223 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2224 /* reset time */ 2225 pkt_dev->flows[flow].count = 0; 2226 pkt_dev->flows[flow].flags = 0; 2227 pkt_dev->curfl += 1; 2228 if (pkt_dev->curfl >= pkt_dev->cflows) 2229 pkt_dev->curfl = 0; /*reset */ 2230 } 2231 } else { 2232 flow = prandom_u32() % pkt_dev->cflows; 2233 pkt_dev->curfl = flow; 2234 2235 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2236 pkt_dev->flows[flow].count = 0; 2237 pkt_dev->flows[flow].flags = 0; 2238 } 2239 } 2240 2241 return pkt_dev->curfl; 2242 } 2243 2244 2245 #ifdef CONFIG_XFRM 2246 /* If there was already an IPSEC SA, we keep it as is, else 2247 * we go look for it ... 2248 */ 2249 #define DUMMY_MARK 0 2250 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2251 { 2252 struct xfrm_state *x = pkt_dev->flows[flow].x; 2253 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2254 if (!x) { 2255 2256 if (pkt_dev->spi) { 2257 /* We need as quick as possible to find the right SA 2258 * Searching with minimum criteria to archieve this. 2259 */ 2260 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); 2261 } else { 2262 /* slow path: we dont already have xfrm_state */ 2263 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 2264 (xfrm_address_t *)&pkt_dev->cur_daddr, 2265 (xfrm_address_t *)&pkt_dev->cur_saddr, 2266 AF_INET, 2267 pkt_dev->ipsmode, 2268 pkt_dev->ipsproto, 0); 2269 } 2270 if (x) { 2271 pkt_dev->flows[flow].x = x; 2272 set_pkt_overhead(pkt_dev); 2273 pkt_dev->pkt_overhead += x->props.header_len; 2274 } 2275 2276 } 2277 } 2278 #endif 2279 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2280 { 2281 2282 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2283 pkt_dev->cur_queue_map = smp_processor_id(); 2284 2285 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2286 __u16 t; 2287 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2288 t = prandom_u32() % 2289 (pkt_dev->queue_map_max - 2290 pkt_dev->queue_map_min + 1) 2291 + pkt_dev->queue_map_min; 2292 } else { 2293 t = pkt_dev->cur_queue_map + 1; 2294 if (t > pkt_dev->queue_map_max) 2295 t = pkt_dev->queue_map_min; 2296 } 2297 pkt_dev->cur_queue_map = t; 2298 } 2299 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2300 } 2301 2302 /* Increment/randomize headers according to flags and current values 2303 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2304 */ 2305 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2306 { 2307 __u32 imn; 2308 __u32 imx; 2309 int flow = 0; 2310 2311 if (pkt_dev->cflows) 2312 flow = f_pick(pkt_dev); 2313 2314 /* Deal with source MAC */ 2315 if (pkt_dev->src_mac_count > 1) { 2316 __u32 mc; 2317 __u32 tmp; 2318 2319 if (pkt_dev->flags & F_MACSRC_RND) 2320 mc = prandom_u32() % pkt_dev->src_mac_count; 2321 else { 2322 mc = pkt_dev->cur_src_mac_offset++; 2323 if (pkt_dev->cur_src_mac_offset >= 2324 pkt_dev->src_mac_count) 2325 pkt_dev->cur_src_mac_offset = 0; 2326 } 2327 2328 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2329 pkt_dev->hh[11] = tmp; 2330 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2331 pkt_dev->hh[10] = tmp; 2332 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2333 pkt_dev->hh[9] = tmp; 2334 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2335 pkt_dev->hh[8] = tmp; 2336 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2337 pkt_dev->hh[7] = tmp; 2338 } 2339 2340 /* Deal with Destination MAC */ 2341 if (pkt_dev->dst_mac_count > 1) { 2342 __u32 mc; 2343 __u32 tmp; 2344 2345 if (pkt_dev->flags & F_MACDST_RND) 2346 mc = prandom_u32() % pkt_dev->dst_mac_count; 2347 2348 else { 2349 mc = pkt_dev->cur_dst_mac_offset++; 2350 if (pkt_dev->cur_dst_mac_offset >= 2351 pkt_dev->dst_mac_count) { 2352 pkt_dev->cur_dst_mac_offset = 0; 2353 } 2354 } 2355 2356 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2357 pkt_dev->hh[5] = tmp; 2358 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2359 pkt_dev->hh[4] = tmp; 2360 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2361 pkt_dev->hh[3] = tmp; 2362 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2363 pkt_dev->hh[2] = tmp; 2364 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2365 pkt_dev->hh[1] = tmp; 2366 } 2367 2368 if (pkt_dev->flags & F_MPLS_RND) { 2369 unsigned int i; 2370 for (i = 0; i < pkt_dev->nr_labels; i++) 2371 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2372 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2373 ((__force __be32)prandom_u32() & 2374 htonl(0x000fffff)); 2375 } 2376 2377 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2378 pkt_dev->vlan_id = prandom_u32() & (4096 - 1); 2379 } 2380 2381 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2382 pkt_dev->svlan_id = prandom_u32() & (4096 - 1); 2383 } 2384 2385 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2386 if (pkt_dev->flags & F_UDPSRC_RND) 2387 pkt_dev->cur_udp_src = prandom_u32() % 2388 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2389 + pkt_dev->udp_src_min; 2390 2391 else { 2392 pkt_dev->cur_udp_src++; 2393 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2394 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2395 } 2396 } 2397 2398 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2399 if (pkt_dev->flags & F_UDPDST_RND) { 2400 pkt_dev->cur_udp_dst = prandom_u32() % 2401 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2402 + pkt_dev->udp_dst_min; 2403 } else { 2404 pkt_dev->cur_udp_dst++; 2405 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2406 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2407 } 2408 } 2409 2410 if (!(pkt_dev->flags & F_IPV6)) { 2411 2412 imn = ntohl(pkt_dev->saddr_min); 2413 imx = ntohl(pkt_dev->saddr_max); 2414 if (imn < imx) { 2415 __u32 t; 2416 if (pkt_dev->flags & F_IPSRC_RND) 2417 t = prandom_u32() % (imx - imn) + imn; 2418 else { 2419 t = ntohl(pkt_dev->cur_saddr); 2420 t++; 2421 if (t > imx) 2422 t = imn; 2423 2424 } 2425 pkt_dev->cur_saddr = htonl(t); 2426 } 2427 2428 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2429 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2430 } else { 2431 imn = ntohl(pkt_dev->daddr_min); 2432 imx = ntohl(pkt_dev->daddr_max); 2433 if (imn < imx) { 2434 __u32 t; 2435 __be32 s; 2436 if (pkt_dev->flags & F_IPDST_RND) { 2437 2438 do { 2439 t = prandom_u32() % 2440 (imx - imn) + imn; 2441 s = htonl(t); 2442 } while (ipv4_is_loopback(s) || 2443 ipv4_is_multicast(s) || 2444 ipv4_is_lbcast(s) || 2445 ipv4_is_zeronet(s) || 2446 ipv4_is_local_multicast(s)); 2447 pkt_dev->cur_daddr = s; 2448 } else { 2449 t = ntohl(pkt_dev->cur_daddr); 2450 t++; 2451 if (t > imx) { 2452 t = imn; 2453 } 2454 pkt_dev->cur_daddr = htonl(t); 2455 } 2456 } 2457 if (pkt_dev->cflows) { 2458 pkt_dev->flows[flow].flags |= F_INIT; 2459 pkt_dev->flows[flow].cur_daddr = 2460 pkt_dev->cur_daddr; 2461 #ifdef CONFIG_XFRM 2462 if (pkt_dev->flags & F_IPSEC_ON) 2463 get_ipsec_sa(pkt_dev, flow); 2464 #endif 2465 pkt_dev->nflows++; 2466 } 2467 } 2468 } else { /* IPV6 * */ 2469 2470 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2471 int i; 2472 2473 /* Only random destinations yet */ 2474 2475 for (i = 0; i < 4; i++) { 2476 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2477 (((__force __be32)prandom_u32() | 2478 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2479 pkt_dev->max_in6_daddr.s6_addr32[i]); 2480 } 2481 } 2482 } 2483 2484 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2485 __u32 t; 2486 if (pkt_dev->flags & F_TXSIZE_RND) { 2487 t = prandom_u32() % 2488 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2489 + pkt_dev->min_pkt_size; 2490 } else { 2491 t = pkt_dev->cur_pkt_size + 1; 2492 if (t > pkt_dev->max_pkt_size) 2493 t = pkt_dev->min_pkt_size; 2494 } 2495 pkt_dev->cur_pkt_size = t; 2496 } 2497 2498 set_cur_queue_map(pkt_dev); 2499 2500 pkt_dev->flows[flow].count++; 2501 } 2502 2503 2504 #ifdef CONFIG_XFRM 2505 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { 2506 2507 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ 2508 }; 2509 2510 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2511 { 2512 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2513 int err = 0; 2514 struct net *net = dev_net(pkt_dev->odev); 2515 2516 if (!x) 2517 return 0; 2518 /* XXX: we dont support tunnel mode for now until 2519 * we resolve the dst issue */ 2520 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) 2521 return 0; 2522 2523 /* But when user specify an valid SPI, transformation 2524 * supports both transport/tunnel mode + ESP/AH type. 2525 */ 2526 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) 2527 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; 2528 2529 rcu_read_lock_bh(); 2530 err = x->outer_mode->output(x, skb); 2531 rcu_read_unlock_bh(); 2532 if (err) { 2533 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); 2534 goto error; 2535 } 2536 err = x->type->output(x, skb); 2537 if (err) { 2538 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); 2539 goto error; 2540 } 2541 spin_lock_bh(&x->lock); 2542 x->curlft.bytes += skb->len; 2543 x->curlft.packets++; 2544 spin_unlock_bh(&x->lock); 2545 error: 2546 return err; 2547 } 2548 2549 static void free_SAs(struct pktgen_dev *pkt_dev) 2550 { 2551 if (pkt_dev->cflows) { 2552 /* let go of the SAs if we have them */ 2553 int i; 2554 for (i = 0; i < pkt_dev->cflows; i++) { 2555 struct xfrm_state *x = pkt_dev->flows[i].x; 2556 if (x) { 2557 xfrm_state_put(x); 2558 pkt_dev->flows[i].x = NULL; 2559 } 2560 } 2561 } 2562 } 2563 2564 static int process_ipsec(struct pktgen_dev *pkt_dev, 2565 struct sk_buff *skb, __be16 protocol) 2566 { 2567 if (pkt_dev->flags & F_IPSEC_ON) { 2568 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2569 int nhead = 0; 2570 if (x) { 2571 int ret; 2572 __u8 *eth; 2573 struct iphdr *iph; 2574 2575 nhead = x->props.header_len - skb_headroom(skb); 2576 if (nhead > 0) { 2577 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2578 if (ret < 0) { 2579 pr_err("Error expanding ipsec packet %d\n", 2580 ret); 2581 goto err; 2582 } 2583 } 2584 2585 /* ipsec is not expecting ll header */ 2586 skb_pull(skb, ETH_HLEN); 2587 ret = pktgen_output_ipsec(skb, pkt_dev); 2588 if (ret) { 2589 pr_err("Error creating ipsec packet %d\n", ret); 2590 goto err; 2591 } 2592 /* restore ll */ 2593 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2594 memcpy(eth, pkt_dev->hh, 12); 2595 *(u16 *) ð[12] = protocol; 2596 2597 /* Update IPv4 header len as well as checksum value */ 2598 iph = ip_hdr(skb); 2599 iph->tot_len = htons(skb->len - ETH_HLEN); 2600 ip_send_check(iph); 2601 } 2602 } 2603 return 1; 2604 err: 2605 kfree_skb(skb); 2606 return 0; 2607 } 2608 #endif 2609 2610 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2611 { 2612 unsigned int i; 2613 for (i = 0; i < pkt_dev->nr_labels; i++) 2614 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2615 2616 mpls--; 2617 *mpls |= MPLS_STACK_BOTTOM; 2618 } 2619 2620 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2621 unsigned int prio) 2622 { 2623 return htons(id | (cfi << 12) | (prio << 13)); 2624 } 2625 2626 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2627 int datalen) 2628 { 2629 struct timeval timestamp; 2630 struct pktgen_hdr *pgh; 2631 2632 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2633 datalen -= sizeof(*pgh); 2634 2635 if (pkt_dev->nfrags <= 0) { 2636 memset(skb_put(skb, datalen), 0, datalen); 2637 } else { 2638 int frags = pkt_dev->nfrags; 2639 int i, len; 2640 int frag_len; 2641 2642 2643 if (frags > MAX_SKB_FRAGS) 2644 frags = MAX_SKB_FRAGS; 2645 len = datalen - frags * PAGE_SIZE; 2646 if (len > 0) { 2647 memset(skb_put(skb, len), 0, len); 2648 datalen = frags * PAGE_SIZE; 2649 } 2650 2651 i = 0; 2652 frag_len = (datalen/frags) < PAGE_SIZE ? 2653 (datalen/frags) : PAGE_SIZE; 2654 while (datalen > 0) { 2655 if (unlikely(!pkt_dev->page)) { 2656 int node = numa_node_id(); 2657 2658 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2659 node = pkt_dev->node; 2660 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2661 if (!pkt_dev->page) 2662 break; 2663 } 2664 get_page(pkt_dev->page); 2665 skb_frag_set_page(skb, i, pkt_dev->page); 2666 skb_shinfo(skb)->frags[i].page_offset = 0; 2667 /*last fragment, fill rest of data*/ 2668 if (i == (frags - 1)) 2669 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2670 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2671 else 2672 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2673 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2674 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2675 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2676 i++; 2677 skb_shinfo(skb)->nr_frags = i; 2678 } 2679 } 2680 2681 /* Stamp the time, and sequence number, 2682 * convert them to network byte order 2683 */ 2684 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2685 pgh->seq_num = htonl(pkt_dev->seq_num); 2686 2687 do_gettimeofday(×tamp); 2688 pgh->tv_sec = htonl(timestamp.tv_sec); 2689 pgh->tv_usec = htonl(timestamp.tv_usec); 2690 } 2691 2692 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2693 struct pktgen_dev *pkt_dev, 2694 unsigned int extralen) 2695 { 2696 struct sk_buff *skb = NULL; 2697 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen + 2698 pkt_dev->pkt_overhead; 2699 2700 if (pkt_dev->flags & F_NODE) { 2701 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2702 2703 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2704 if (likely(skb)) { 2705 skb_reserve(skb, NET_SKB_PAD); 2706 skb->dev = dev; 2707 } 2708 } else { 2709 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2710 } 2711 2712 return skb; 2713 } 2714 2715 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2716 struct pktgen_dev *pkt_dev) 2717 { 2718 struct sk_buff *skb = NULL; 2719 __u8 *eth; 2720 struct udphdr *udph; 2721 int datalen, iplen; 2722 struct iphdr *iph; 2723 __be16 protocol = htons(ETH_P_IP); 2724 __be32 *mpls; 2725 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2726 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2727 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2728 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2729 u16 queue_map; 2730 2731 if (pkt_dev->nr_labels) 2732 protocol = htons(ETH_P_MPLS_UC); 2733 2734 if (pkt_dev->vlan_id != 0xffff) 2735 protocol = htons(ETH_P_8021Q); 2736 2737 /* Update any of the values, used when we're incrementing various 2738 * fields. 2739 */ 2740 mod_cur_headers(pkt_dev); 2741 queue_map = pkt_dev->cur_queue_map; 2742 2743 datalen = (odev->hard_header_len + 16) & ~0xf; 2744 2745 skb = pktgen_alloc_skb(odev, pkt_dev, datalen); 2746 if (!skb) { 2747 sprintf(pkt_dev->result, "No memory"); 2748 return NULL; 2749 } 2750 2751 prefetchw(skb->data); 2752 skb_reserve(skb, datalen); 2753 2754 /* Reserve for ethernet and IP header */ 2755 eth = (__u8 *) skb_push(skb, 14); 2756 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2757 if (pkt_dev->nr_labels) 2758 mpls_push(mpls, pkt_dev); 2759 2760 if (pkt_dev->vlan_id != 0xffff) { 2761 if (pkt_dev->svlan_id != 0xffff) { 2762 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2763 *svlan_tci = build_tci(pkt_dev->svlan_id, 2764 pkt_dev->svlan_cfi, 2765 pkt_dev->svlan_p); 2766 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2767 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2768 } 2769 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2770 *vlan_tci = build_tci(pkt_dev->vlan_id, 2771 pkt_dev->vlan_cfi, 2772 pkt_dev->vlan_p); 2773 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2774 *vlan_encapsulated_proto = htons(ETH_P_IP); 2775 } 2776 2777 skb_set_mac_header(skb, 0); 2778 skb_set_network_header(skb, skb->len); 2779 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr)); 2780 2781 skb_set_transport_header(skb, skb->len); 2782 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2783 skb_set_queue_mapping(skb, queue_map); 2784 skb->priority = pkt_dev->skb_priority; 2785 2786 memcpy(eth, pkt_dev->hh, 12); 2787 *(__be16 *) & eth[12] = protocol; 2788 2789 /* Eth + IPh + UDPh + mpls */ 2790 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2791 pkt_dev->pkt_overhead; 2792 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2793 datalen = sizeof(struct pktgen_hdr); 2794 2795 udph->source = htons(pkt_dev->cur_udp_src); 2796 udph->dest = htons(pkt_dev->cur_udp_dst); 2797 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2798 udph->check = 0; 2799 2800 iph->ihl = 5; 2801 iph->version = 4; 2802 iph->ttl = 32; 2803 iph->tos = pkt_dev->tos; 2804 iph->protocol = IPPROTO_UDP; /* UDP */ 2805 iph->saddr = pkt_dev->cur_saddr; 2806 iph->daddr = pkt_dev->cur_daddr; 2807 iph->id = htons(pkt_dev->ip_id); 2808 pkt_dev->ip_id++; 2809 iph->frag_off = 0; 2810 iplen = 20 + 8 + datalen; 2811 iph->tot_len = htons(iplen); 2812 ip_send_check(iph); 2813 skb->protocol = protocol; 2814 skb->dev = odev; 2815 skb->pkt_type = PACKET_HOST; 2816 2817 if (!(pkt_dev->flags & F_UDPCSUM)) { 2818 skb->ip_summed = CHECKSUM_NONE; 2819 } else if (odev->features & NETIF_F_V4_CSUM) { 2820 skb->ip_summed = CHECKSUM_PARTIAL; 2821 skb->csum = 0; 2822 udp4_hwcsum(skb, udph->source, udph->dest); 2823 } else { 2824 __wsum csum = udp_csum(skb); 2825 2826 /* add protocol-dependent pseudo-header */ 2827 udph->check = csum_tcpudp_magic(udph->source, udph->dest, 2828 datalen + 8, IPPROTO_UDP, csum); 2829 2830 if (udph->check == 0) 2831 udph->check = CSUM_MANGLED_0; 2832 } 2833 2834 pktgen_finalize_skb(pkt_dev, skb, datalen); 2835 2836 #ifdef CONFIG_XFRM 2837 if (!process_ipsec(pkt_dev, skb, protocol)) 2838 return NULL; 2839 #endif 2840 2841 return skb; 2842 } 2843 2844 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2845 struct pktgen_dev *pkt_dev) 2846 { 2847 struct sk_buff *skb = NULL; 2848 __u8 *eth; 2849 struct udphdr *udph; 2850 int datalen, udplen; 2851 struct ipv6hdr *iph; 2852 __be16 protocol = htons(ETH_P_IPV6); 2853 __be32 *mpls; 2854 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2855 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2856 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2857 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2858 u16 queue_map; 2859 2860 if (pkt_dev->nr_labels) 2861 protocol = htons(ETH_P_MPLS_UC); 2862 2863 if (pkt_dev->vlan_id != 0xffff) 2864 protocol = htons(ETH_P_8021Q); 2865 2866 /* Update any of the values, used when we're incrementing various 2867 * fields. 2868 */ 2869 mod_cur_headers(pkt_dev); 2870 queue_map = pkt_dev->cur_queue_map; 2871 2872 skb = pktgen_alloc_skb(odev, pkt_dev, 16); 2873 if (!skb) { 2874 sprintf(pkt_dev->result, "No memory"); 2875 return NULL; 2876 } 2877 2878 prefetchw(skb->data); 2879 skb_reserve(skb, 16); 2880 2881 /* Reserve for ethernet and IP header */ 2882 eth = (__u8 *) skb_push(skb, 14); 2883 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2884 if (pkt_dev->nr_labels) 2885 mpls_push(mpls, pkt_dev); 2886 2887 if (pkt_dev->vlan_id != 0xffff) { 2888 if (pkt_dev->svlan_id != 0xffff) { 2889 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2890 *svlan_tci = build_tci(pkt_dev->svlan_id, 2891 pkt_dev->svlan_cfi, 2892 pkt_dev->svlan_p); 2893 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2894 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2895 } 2896 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2897 *vlan_tci = build_tci(pkt_dev->vlan_id, 2898 pkt_dev->vlan_cfi, 2899 pkt_dev->vlan_p); 2900 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2901 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2902 } 2903 2904 skb_set_mac_header(skb, 0); 2905 skb_set_network_header(skb, skb->len); 2906 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr)); 2907 2908 skb_set_transport_header(skb, skb->len); 2909 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr)); 2910 skb_set_queue_mapping(skb, queue_map); 2911 skb->priority = pkt_dev->skb_priority; 2912 2913 memcpy(eth, pkt_dev->hh, 12); 2914 *(__be16 *) ð[12] = protocol; 2915 2916 /* Eth + IPh + UDPh + mpls */ 2917 datalen = pkt_dev->cur_pkt_size - 14 - 2918 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2919 pkt_dev->pkt_overhead; 2920 2921 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2922 datalen = sizeof(struct pktgen_hdr); 2923 net_info_ratelimited("increased datalen to %d\n", datalen); 2924 } 2925 2926 udplen = datalen + sizeof(struct udphdr); 2927 udph->source = htons(pkt_dev->cur_udp_src); 2928 udph->dest = htons(pkt_dev->cur_udp_dst); 2929 udph->len = htons(udplen); 2930 udph->check = 0; 2931 2932 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2933 2934 if (pkt_dev->traffic_class) { 2935 /* Version + traffic class + flow (0) */ 2936 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2937 } 2938 2939 iph->hop_limit = 32; 2940 2941 iph->payload_len = htons(udplen); 2942 iph->nexthdr = IPPROTO_UDP; 2943 2944 iph->daddr = pkt_dev->cur_in6_daddr; 2945 iph->saddr = pkt_dev->cur_in6_saddr; 2946 2947 skb->protocol = protocol; 2948 skb->dev = odev; 2949 skb->pkt_type = PACKET_HOST; 2950 2951 if (!(pkt_dev->flags & F_UDPCSUM)) { 2952 skb->ip_summed = CHECKSUM_NONE; 2953 } else if (odev->features & NETIF_F_V6_CSUM) { 2954 skb->ip_summed = CHECKSUM_PARTIAL; 2955 skb->csum_start = skb_transport_header(skb) - skb->head; 2956 skb->csum_offset = offsetof(struct udphdr, check); 2957 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 2958 } else { 2959 __wsum csum = udp_csum(skb); 2960 2961 /* add protocol-dependent pseudo-header */ 2962 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 2963 2964 if (udph->check == 0) 2965 udph->check = CSUM_MANGLED_0; 2966 } 2967 2968 pktgen_finalize_skb(pkt_dev, skb, datalen); 2969 2970 return skb; 2971 } 2972 2973 static struct sk_buff *fill_packet(struct net_device *odev, 2974 struct pktgen_dev *pkt_dev) 2975 { 2976 if (pkt_dev->flags & F_IPV6) 2977 return fill_packet_ipv6(odev, pkt_dev); 2978 else 2979 return fill_packet_ipv4(odev, pkt_dev); 2980 } 2981 2982 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2983 { 2984 pkt_dev->seq_num = 1; 2985 pkt_dev->idle_acc = 0; 2986 pkt_dev->sofar = 0; 2987 pkt_dev->tx_bytes = 0; 2988 pkt_dev->errors = 0; 2989 } 2990 2991 /* Set up structure for sending pkts, clear counters */ 2992 2993 static void pktgen_run(struct pktgen_thread *t) 2994 { 2995 struct pktgen_dev *pkt_dev; 2996 int started = 0; 2997 2998 func_enter(); 2999 3000 if_lock(t); 3001 list_for_each_entry(pkt_dev, &t->if_list, list) { 3002 3003 /* 3004 * setup odev and create initial packet. 3005 */ 3006 pktgen_setup_inject(pkt_dev); 3007 3008 if (pkt_dev->odev) { 3009 pktgen_clear_counters(pkt_dev); 3010 pkt_dev->running = 1; /* Cranke yeself! */ 3011 pkt_dev->skb = NULL; 3012 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3013 3014 set_pkt_overhead(pkt_dev); 3015 3016 strcpy(pkt_dev->result, "Starting"); 3017 started++; 3018 } else 3019 strcpy(pkt_dev->result, "Error starting"); 3020 } 3021 if_unlock(t); 3022 if (started) 3023 t->control &= ~(T_STOP); 3024 } 3025 3026 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) 3027 { 3028 struct pktgen_thread *t; 3029 3030 func_enter(); 3031 3032 mutex_lock(&pktgen_thread_lock); 3033 3034 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3035 t->control |= T_STOP; 3036 3037 mutex_unlock(&pktgen_thread_lock); 3038 } 3039 3040 static int thread_is_running(const struct pktgen_thread *t) 3041 { 3042 const struct pktgen_dev *pkt_dev; 3043 3044 list_for_each_entry(pkt_dev, &t->if_list, list) 3045 if (pkt_dev->running) 3046 return 1; 3047 return 0; 3048 } 3049 3050 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3051 { 3052 if_lock(t); 3053 3054 while (thread_is_running(t)) { 3055 3056 if_unlock(t); 3057 3058 msleep_interruptible(100); 3059 3060 if (signal_pending(current)) 3061 goto signal; 3062 if_lock(t); 3063 } 3064 if_unlock(t); 3065 return 1; 3066 signal: 3067 return 0; 3068 } 3069 3070 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3071 { 3072 struct pktgen_thread *t; 3073 int sig = 1; 3074 3075 mutex_lock(&pktgen_thread_lock); 3076 3077 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3078 sig = pktgen_wait_thread_run(t); 3079 if (sig == 0) 3080 break; 3081 } 3082 3083 if (sig == 0) 3084 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3085 t->control |= (T_STOP); 3086 3087 mutex_unlock(&pktgen_thread_lock); 3088 return sig; 3089 } 3090 3091 static void pktgen_run_all_threads(struct pktgen_net *pn) 3092 { 3093 struct pktgen_thread *t; 3094 3095 func_enter(); 3096 3097 mutex_lock(&pktgen_thread_lock); 3098 3099 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3100 t->control |= (T_RUN); 3101 3102 mutex_unlock(&pktgen_thread_lock); 3103 3104 /* Propagate thread->control */ 3105 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3106 3107 pktgen_wait_all_threads_run(pn); 3108 } 3109 3110 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3111 { 3112 struct pktgen_thread *t; 3113 3114 func_enter(); 3115 3116 mutex_lock(&pktgen_thread_lock); 3117 3118 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3119 t->control |= (T_REMDEVALL); 3120 3121 mutex_unlock(&pktgen_thread_lock); 3122 3123 /* Propagate thread->control */ 3124 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3125 3126 pktgen_wait_all_threads_run(pn); 3127 } 3128 3129 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3130 { 3131 __u64 bps, mbps, pps; 3132 char *p = pkt_dev->result; 3133 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3134 pkt_dev->started_at); 3135 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3136 3137 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3138 (unsigned long long)ktime_to_us(elapsed), 3139 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3140 (unsigned long long)ktime_to_us(idle), 3141 (unsigned long long)pkt_dev->sofar, 3142 pkt_dev->cur_pkt_size, nr_frags); 3143 3144 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3145 ktime_to_ns(elapsed)); 3146 3147 bps = pps * 8 * pkt_dev->cur_pkt_size; 3148 3149 mbps = bps; 3150 do_div(mbps, 1000000); 3151 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3152 (unsigned long long)pps, 3153 (unsigned long long)mbps, 3154 (unsigned long long)bps, 3155 (unsigned long long)pkt_dev->errors); 3156 } 3157 3158 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3159 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3160 { 3161 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3162 3163 if (!pkt_dev->running) { 3164 pr_warning("interface: %s is already stopped\n", 3165 pkt_dev->odevname); 3166 return -EINVAL; 3167 } 3168 3169 kfree_skb(pkt_dev->skb); 3170 pkt_dev->skb = NULL; 3171 pkt_dev->stopped_at = ktime_get(); 3172 pkt_dev->running = 0; 3173 3174 show_results(pkt_dev, nr_frags); 3175 3176 return 0; 3177 } 3178 3179 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3180 { 3181 struct pktgen_dev *pkt_dev, *best = NULL; 3182 3183 if_lock(t); 3184 3185 list_for_each_entry(pkt_dev, &t->if_list, list) { 3186 if (!pkt_dev->running) 3187 continue; 3188 if (best == NULL) 3189 best = pkt_dev; 3190 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3191 best = pkt_dev; 3192 } 3193 if_unlock(t); 3194 return best; 3195 } 3196 3197 static void pktgen_stop(struct pktgen_thread *t) 3198 { 3199 struct pktgen_dev *pkt_dev; 3200 3201 func_enter(); 3202 3203 if_lock(t); 3204 3205 list_for_each_entry(pkt_dev, &t->if_list, list) { 3206 pktgen_stop_device(pkt_dev); 3207 } 3208 3209 if_unlock(t); 3210 } 3211 3212 /* 3213 * one of our devices needs to be removed - find it 3214 * and remove it 3215 */ 3216 static void pktgen_rem_one_if(struct pktgen_thread *t) 3217 { 3218 struct list_head *q, *n; 3219 struct pktgen_dev *cur; 3220 3221 func_enter(); 3222 3223 if_lock(t); 3224 3225 list_for_each_safe(q, n, &t->if_list) { 3226 cur = list_entry(q, struct pktgen_dev, list); 3227 3228 if (!cur->removal_mark) 3229 continue; 3230 3231 kfree_skb(cur->skb); 3232 cur->skb = NULL; 3233 3234 pktgen_remove_device(t, cur); 3235 3236 break; 3237 } 3238 3239 if_unlock(t); 3240 } 3241 3242 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3243 { 3244 struct list_head *q, *n; 3245 struct pktgen_dev *cur; 3246 3247 func_enter(); 3248 3249 /* Remove all devices, free mem */ 3250 3251 if_lock(t); 3252 3253 list_for_each_safe(q, n, &t->if_list) { 3254 cur = list_entry(q, struct pktgen_dev, list); 3255 3256 kfree_skb(cur->skb); 3257 cur->skb = NULL; 3258 3259 pktgen_remove_device(t, cur); 3260 } 3261 3262 if_unlock(t); 3263 } 3264 3265 static void pktgen_rem_thread(struct pktgen_thread *t) 3266 { 3267 /* Remove from the thread list */ 3268 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3269 } 3270 3271 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3272 { 3273 ktime_t idle_start = ktime_get(); 3274 schedule(); 3275 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3276 } 3277 3278 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3279 { 3280 ktime_t idle_start = ktime_get(); 3281 3282 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3283 if (signal_pending(current)) 3284 break; 3285 3286 if (need_resched()) 3287 pktgen_resched(pkt_dev); 3288 else 3289 cpu_relax(); 3290 } 3291 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3292 } 3293 3294 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3295 { 3296 struct net_device *odev = pkt_dev->odev; 3297 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3298 = odev->netdev_ops->ndo_start_xmit; 3299 struct netdev_queue *txq; 3300 u16 queue_map; 3301 int ret; 3302 3303 /* If device is offline, then don't send */ 3304 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3305 pktgen_stop_device(pkt_dev); 3306 return; 3307 } 3308 3309 /* This is max DELAY, this has special meaning of 3310 * "never transmit" 3311 */ 3312 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3313 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3314 return; 3315 } 3316 3317 /* If no skb or clone count exhausted then get new one */ 3318 if (!pkt_dev->skb || (pkt_dev->last_ok && 3319 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3320 /* build a new pkt */ 3321 kfree_skb(pkt_dev->skb); 3322 3323 pkt_dev->skb = fill_packet(odev, pkt_dev); 3324 if (pkt_dev->skb == NULL) { 3325 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3326 schedule(); 3327 pkt_dev->clone_count--; /* back out increment, OOM */ 3328 return; 3329 } 3330 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3331 pkt_dev->allocated_skbs++; 3332 pkt_dev->clone_count = 0; /* reset counter */ 3333 } 3334 3335 if (pkt_dev->delay && pkt_dev->last_ok) 3336 spin(pkt_dev, pkt_dev->next_tx); 3337 3338 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3339 txq = netdev_get_tx_queue(odev, queue_map); 3340 3341 local_bh_disable(); 3342 3343 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3344 3345 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3346 ret = NETDEV_TX_BUSY; 3347 pkt_dev->last_ok = 0; 3348 goto unlock; 3349 } 3350 atomic_inc(&(pkt_dev->skb->users)); 3351 ret = (*xmit)(pkt_dev->skb, odev); 3352 3353 switch (ret) { 3354 case NETDEV_TX_OK: 3355 txq_trans_update(txq); 3356 pkt_dev->last_ok = 1; 3357 pkt_dev->sofar++; 3358 pkt_dev->seq_num++; 3359 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3360 break; 3361 case NET_XMIT_DROP: 3362 case NET_XMIT_CN: 3363 case NET_XMIT_POLICED: 3364 /* skb has been consumed */ 3365 pkt_dev->errors++; 3366 break; 3367 default: /* Drivers are not supposed to return other values! */ 3368 net_info_ratelimited("%s xmit error: %d\n", 3369 pkt_dev->odevname, ret); 3370 pkt_dev->errors++; 3371 /* fallthru */ 3372 case NETDEV_TX_LOCKED: 3373 case NETDEV_TX_BUSY: 3374 /* Retry it next time */ 3375 atomic_dec(&(pkt_dev->skb->users)); 3376 pkt_dev->last_ok = 0; 3377 } 3378 unlock: 3379 HARD_TX_UNLOCK(odev, txq); 3380 3381 local_bh_enable(); 3382 3383 /* If pkt_dev->count is zero, then run forever */ 3384 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3385 pktgen_wait_for_skb(pkt_dev); 3386 3387 /* Done with this */ 3388 pktgen_stop_device(pkt_dev); 3389 } 3390 } 3391 3392 /* 3393 * Main loop of the thread goes here 3394 */ 3395 3396 static int pktgen_thread_worker(void *arg) 3397 { 3398 DEFINE_WAIT(wait); 3399 struct pktgen_thread *t = arg; 3400 struct pktgen_dev *pkt_dev = NULL; 3401 int cpu = t->cpu; 3402 3403 BUG_ON(smp_processor_id() != cpu); 3404 3405 init_waitqueue_head(&t->queue); 3406 complete(&t->start_done); 3407 3408 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3409 3410 set_current_state(TASK_INTERRUPTIBLE); 3411 3412 set_freezable(); 3413 3414 while (!kthread_should_stop()) { 3415 pkt_dev = next_to_run(t); 3416 3417 if (unlikely(!pkt_dev && t->control == 0)) { 3418 if (t->net->pktgen_exiting) 3419 break; 3420 wait_event_interruptible_timeout(t->queue, 3421 t->control != 0, 3422 HZ/10); 3423 try_to_freeze(); 3424 continue; 3425 } 3426 3427 __set_current_state(TASK_RUNNING); 3428 3429 if (likely(pkt_dev)) { 3430 pktgen_xmit(pkt_dev); 3431 3432 if (need_resched()) 3433 pktgen_resched(pkt_dev); 3434 else 3435 cpu_relax(); 3436 } 3437 3438 if (t->control & T_STOP) { 3439 pktgen_stop(t); 3440 t->control &= ~(T_STOP); 3441 } 3442 3443 if (t->control & T_RUN) { 3444 pktgen_run(t); 3445 t->control &= ~(T_RUN); 3446 } 3447 3448 if (t->control & T_REMDEVALL) { 3449 pktgen_rem_all_ifs(t); 3450 t->control &= ~(T_REMDEVALL); 3451 } 3452 3453 if (t->control & T_REMDEV) { 3454 pktgen_rem_one_if(t); 3455 t->control &= ~(T_REMDEV); 3456 } 3457 3458 try_to_freeze(); 3459 3460 set_current_state(TASK_INTERRUPTIBLE); 3461 } 3462 3463 pr_debug("%s stopping all device\n", t->tsk->comm); 3464 pktgen_stop(t); 3465 3466 pr_debug("%s removing all device\n", t->tsk->comm); 3467 pktgen_rem_all_ifs(t); 3468 3469 pr_debug("%s removing thread\n", t->tsk->comm); 3470 pktgen_rem_thread(t); 3471 3472 /* Wait for kthread_stop */ 3473 while (!kthread_should_stop()) { 3474 set_current_state(TASK_INTERRUPTIBLE); 3475 schedule(); 3476 } 3477 __set_current_state(TASK_RUNNING); 3478 3479 return 0; 3480 } 3481 3482 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3483 const char *ifname, bool exact) 3484 { 3485 struct pktgen_dev *p, *pkt_dev = NULL; 3486 size_t len = strlen(ifname); 3487 3488 if_lock(t); 3489 list_for_each_entry(p, &t->if_list, list) 3490 if (strncmp(p->odevname, ifname, len) == 0) { 3491 if (p->odevname[len]) { 3492 if (exact || p->odevname[len] != '@') 3493 continue; 3494 } 3495 pkt_dev = p; 3496 break; 3497 } 3498 3499 if_unlock(t); 3500 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3501 return pkt_dev; 3502 } 3503 3504 /* 3505 * Adds a dev at front of if_list. 3506 */ 3507 3508 static int add_dev_to_thread(struct pktgen_thread *t, 3509 struct pktgen_dev *pkt_dev) 3510 { 3511 int rv = 0; 3512 3513 if_lock(t); 3514 3515 if (pkt_dev->pg_thread) { 3516 pr_err("ERROR: already assigned to a thread\n"); 3517 rv = -EBUSY; 3518 goto out; 3519 } 3520 3521 list_add(&pkt_dev->list, &t->if_list); 3522 pkt_dev->pg_thread = t; 3523 pkt_dev->running = 0; 3524 3525 out: 3526 if_unlock(t); 3527 return rv; 3528 } 3529 3530 /* Called under thread lock */ 3531 3532 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3533 { 3534 struct pktgen_dev *pkt_dev; 3535 int err; 3536 int node = cpu_to_node(t->cpu); 3537 3538 /* We don't allow a device to be on several threads */ 3539 3540 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3541 if (pkt_dev) { 3542 pr_err("ERROR: interface already used\n"); 3543 return -EBUSY; 3544 } 3545 3546 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3547 if (!pkt_dev) 3548 return -ENOMEM; 3549 3550 strcpy(pkt_dev->odevname, ifname); 3551 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3552 node); 3553 if (pkt_dev->flows == NULL) { 3554 kfree(pkt_dev); 3555 return -ENOMEM; 3556 } 3557 3558 pkt_dev->removal_mark = 0; 3559 pkt_dev->nfrags = 0; 3560 pkt_dev->delay = pg_delay_d; 3561 pkt_dev->count = pg_count_d; 3562 pkt_dev->sofar = 0; 3563 pkt_dev->udp_src_min = 9; /* sink port */ 3564 pkt_dev->udp_src_max = 9; 3565 pkt_dev->udp_dst_min = 9; 3566 pkt_dev->udp_dst_max = 9; 3567 pkt_dev->vlan_p = 0; 3568 pkt_dev->vlan_cfi = 0; 3569 pkt_dev->vlan_id = 0xffff; 3570 pkt_dev->svlan_p = 0; 3571 pkt_dev->svlan_cfi = 0; 3572 pkt_dev->svlan_id = 0xffff; 3573 pkt_dev->node = -1; 3574 3575 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3576 if (err) 3577 goto out1; 3578 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3579 pkt_dev->clone_skb = pg_clone_skb_d; 3580 3581 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3582 &pktgen_if_fops, pkt_dev); 3583 if (!pkt_dev->entry) { 3584 pr_err("cannot create %s/%s procfs entry\n", 3585 PG_PROC_DIR, ifname); 3586 err = -EINVAL; 3587 goto out2; 3588 } 3589 #ifdef CONFIG_XFRM 3590 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3591 pkt_dev->ipsproto = IPPROTO_ESP; 3592 3593 /* xfrm tunnel mode needs additional dst to extract outter 3594 * ip header protocol/ttl/id field, here creat a phony one. 3595 * instead of looking for a valid rt, which definitely hurting 3596 * performance under such circumstance. 3597 */ 3598 pkt_dev->dstops.family = AF_INET; 3599 pkt_dev->dst.dev = pkt_dev->odev; 3600 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); 3601 pkt_dev->dst.child = &pkt_dev->dst; 3602 pkt_dev->dst.ops = &pkt_dev->dstops; 3603 #endif 3604 3605 return add_dev_to_thread(t, pkt_dev); 3606 out2: 3607 dev_put(pkt_dev->odev); 3608 out1: 3609 #ifdef CONFIG_XFRM 3610 free_SAs(pkt_dev); 3611 #endif 3612 vfree(pkt_dev->flows); 3613 kfree(pkt_dev); 3614 return err; 3615 } 3616 3617 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3618 { 3619 struct pktgen_thread *t; 3620 struct proc_dir_entry *pe; 3621 struct task_struct *p; 3622 3623 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3624 cpu_to_node(cpu)); 3625 if (!t) { 3626 pr_err("ERROR: out of memory, can't create new thread\n"); 3627 return -ENOMEM; 3628 } 3629 3630 spin_lock_init(&t->if_lock); 3631 t->cpu = cpu; 3632 3633 INIT_LIST_HEAD(&t->if_list); 3634 3635 list_add_tail(&t->th_list, &pn->pktgen_threads); 3636 init_completion(&t->start_done); 3637 3638 p = kthread_create_on_node(pktgen_thread_worker, 3639 t, 3640 cpu_to_node(cpu), 3641 "kpktgend_%d", cpu); 3642 if (IS_ERR(p)) { 3643 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3644 list_del(&t->th_list); 3645 kfree(t); 3646 return PTR_ERR(p); 3647 } 3648 kthread_bind(p, cpu); 3649 t->tsk = p; 3650 3651 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3652 &pktgen_thread_fops, t); 3653 if (!pe) { 3654 pr_err("cannot create %s/%s procfs entry\n", 3655 PG_PROC_DIR, t->tsk->comm); 3656 kthread_stop(p); 3657 list_del(&t->th_list); 3658 kfree(t); 3659 return -EINVAL; 3660 } 3661 3662 t->net = pn; 3663 wake_up_process(p); 3664 wait_for_completion(&t->start_done); 3665 3666 return 0; 3667 } 3668 3669 /* 3670 * Removes a device from the thread if_list. 3671 */ 3672 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3673 struct pktgen_dev *pkt_dev) 3674 { 3675 struct list_head *q, *n; 3676 struct pktgen_dev *p; 3677 3678 list_for_each_safe(q, n, &t->if_list) { 3679 p = list_entry(q, struct pktgen_dev, list); 3680 if (p == pkt_dev) 3681 list_del(&p->list); 3682 } 3683 } 3684 3685 static int pktgen_remove_device(struct pktgen_thread *t, 3686 struct pktgen_dev *pkt_dev) 3687 { 3688 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3689 3690 if (pkt_dev->running) { 3691 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3692 pktgen_stop_device(pkt_dev); 3693 } 3694 3695 /* Dis-associate from the interface */ 3696 3697 if (pkt_dev->odev) { 3698 dev_put(pkt_dev->odev); 3699 pkt_dev->odev = NULL; 3700 } 3701 3702 /* And update the thread if_list */ 3703 3704 _rem_dev_from_if_list(t, pkt_dev); 3705 3706 if (pkt_dev->entry) 3707 proc_remove(pkt_dev->entry); 3708 3709 #ifdef CONFIG_XFRM 3710 free_SAs(pkt_dev); 3711 #endif 3712 vfree(pkt_dev->flows); 3713 if (pkt_dev->page) 3714 put_page(pkt_dev->page); 3715 kfree(pkt_dev); 3716 return 0; 3717 } 3718 3719 static int __net_init pg_net_init(struct net *net) 3720 { 3721 struct pktgen_net *pn = net_generic(net, pg_net_id); 3722 struct proc_dir_entry *pe; 3723 int cpu, ret = 0; 3724 3725 pn->net = net; 3726 INIT_LIST_HEAD(&pn->pktgen_threads); 3727 pn->pktgen_exiting = false; 3728 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3729 if (!pn->proc_dir) { 3730 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3731 return -ENODEV; 3732 } 3733 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3734 if (pe == NULL) { 3735 pr_err("cannot create %s procfs entry\n", PGCTRL); 3736 ret = -EINVAL; 3737 goto remove; 3738 } 3739 3740 for_each_online_cpu(cpu) { 3741 int err; 3742 3743 err = pktgen_create_thread(cpu, pn); 3744 if (err) 3745 pr_warn("Cannot create thread for cpu %d (%d)\n", 3746 cpu, err); 3747 } 3748 3749 if (list_empty(&pn->pktgen_threads)) { 3750 pr_err("Initialization failed for all threads\n"); 3751 ret = -ENODEV; 3752 goto remove_entry; 3753 } 3754 3755 return 0; 3756 3757 remove_entry: 3758 remove_proc_entry(PGCTRL, pn->proc_dir); 3759 remove: 3760 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3761 return ret; 3762 } 3763 3764 static void __net_exit pg_net_exit(struct net *net) 3765 { 3766 struct pktgen_net *pn = net_generic(net, pg_net_id); 3767 struct pktgen_thread *t; 3768 struct list_head *q, *n; 3769 LIST_HEAD(list); 3770 3771 /* Stop all interfaces & threads */ 3772 pn->pktgen_exiting = true; 3773 3774 mutex_lock(&pktgen_thread_lock); 3775 list_splice_init(&pn->pktgen_threads, &list); 3776 mutex_unlock(&pktgen_thread_lock); 3777 3778 list_for_each_safe(q, n, &list) { 3779 t = list_entry(q, struct pktgen_thread, th_list); 3780 list_del(&t->th_list); 3781 kthread_stop(t->tsk); 3782 kfree(t); 3783 } 3784 3785 remove_proc_entry(PGCTRL, pn->proc_dir); 3786 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3787 } 3788 3789 static struct pernet_operations pg_net_ops = { 3790 .init = pg_net_init, 3791 .exit = pg_net_exit, 3792 .id = &pg_net_id, 3793 .size = sizeof(struct pktgen_net), 3794 }; 3795 3796 static int __init pg_init(void) 3797 { 3798 int ret = 0; 3799 3800 pr_info("%s", version); 3801 ret = register_pernet_subsys(&pg_net_ops); 3802 if (ret) 3803 return ret; 3804 ret = register_netdevice_notifier(&pktgen_notifier_block); 3805 if (ret) 3806 unregister_pernet_subsys(&pg_net_ops); 3807 3808 return ret; 3809 } 3810 3811 static void __exit pg_cleanup(void) 3812 { 3813 unregister_netdevice_notifier(&pktgen_notifier_block); 3814 unregister_pernet_subsys(&pg_net_ops); 3815 } 3816 3817 module_init(pg_init); 3818 module_exit(pg_cleanup); 3819 3820 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3821 MODULE_DESCRIPTION("Packet Generator tool"); 3822 MODULE_LICENSE("GPL"); 3823 MODULE_VERSION(VERSION); 3824 module_param(pg_count_d, int, 0); 3825 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3826 module_param(pg_delay_d, int, 0); 3827 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3828 module_param(pg_clone_skb_d, int, 0); 3829 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3830 module_param(debug, int, 0); 3831 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3832