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