1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. 73 * The if_list is RCU protected, and the if_lock remains to protect updating 74 * of if_list, from "add_device" as it invoked from userspace (via proc write). 75 * 76 * By design there should only be *one* "controlling" process. In practice 77 * multiple write accesses gives unpredictable result. Understood by "write" 78 * to /proc gives result code thats should be read be the "writer". 79 * For practical use this should be no problem. 80 * 81 * Note when adding devices to a specific CPU there good idea to also assign 82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 83 * --ro 84 * 85 * Fix refcount off by one if first packet fails, potential null deref, 86 * memleak 030710- KJP 87 * 88 * First "ranges" functionality for ipv6 030726 --ro 89 * 90 * Included flow support. 030802 ANK. 91 * 92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 93 * 94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 96 * 97 * New xmit() return, do_div and misc clean up by Stephen Hemminger 98 * <shemminger@osdl.org> 040923 99 * 100 * Randy Dunlap fixed u64 printk compiler waring 101 * 102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 104 * 105 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 107 * 108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 109 * 050103 110 * 111 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 112 * 113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 114 * 115 * Fixed src_mac command to set source mac of packet to value specified in 116 * command by Adit Ranadive <adit.262@gmail.com> 117 * 118 */ 119 120 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 121 122 #include <linux/sys.h> 123 #include <linux/types.h> 124 #include <linux/module.h> 125 #include <linux/moduleparam.h> 126 #include <linux/kernel.h> 127 #include <linux/mutex.h> 128 #include <linux/sched.h> 129 #include <linux/slab.h> 130 #include <linux/vmalloc.h> 131 #include <linux/unistd.h> 132 #include <linux/string.h> 133 #include <linux/ptrace.h> 134 #include <linux/errno.h> 135 #include <linux/ioport.h> 136 #include <linux/interrupt.h> 137 #include <linux/capability.h> 138 #include <linux/hrtimer.h> 139 #include <linux/freezer.h> 140 #include <linux/delay.h> 141 #include <linux/timer.h> 142 #include <linux/list.h> 143 #include <linux/init.h> 144 #include <linux/skbuff.h> 145 #include <linux/netdevice.h> 146 #include <linux/inet.h> 147 #include <linux/inetdevice.h> 148 #include <linux/rtnetlink.h> 149 #include <linux/if_arp.h> 150 #include <linux/if_vlan.h> 151 #include <linux/in.h> 152 #include <linux/ip.h> 153 #include <linux/ipv6.h> 154 #include <linux/udp.h> 155 #include <linux/proc_fs.h> 156 #include <linux/seq_file.h> 157 #include <linux/wait.h> 158 #include <linux/etherdevice.h> 159 #include <linux/kthread.h> 160 #include <linux/prefetch.h> 161 #include <net/net_namespace.h> 162 #include <net/checksum.h> 163 #include <net/ipv6.h> 164 #include <net/udp.h> 165 #include <net/ip6_checksum.h> 166 #include <net/addrconf.h> 167 #ifdef CONFIG_XFRM 168 #include <net/xfrm.h> 169 #endif 170 #include <net/netns/generic.h> 171 #include <asm/byteorder.h> 172 #include <linux/rcupdate.h> 173 #include <linux/bitops.h> 174 #include <linux/io.h> 175 #include <linux/timex.h> 176 #include <linux/uaccess.h> 177 #include <asm/dma.h> 178 #include <asm/div64.h> /* do_div */ 179 180 #define VERSION "2.74" 181 #define IP_NAME_SZ 32 182 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 183 #define MPLS_STACK_BOTTOM htonl(0x00000100) 184 185 #define func_enter() pr_debug("entering %s\n", __func__); 186 187 /* Device flag bits */ 188 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 189 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 190 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 191 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 192 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 193 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 194 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 195 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 196 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 197 #define F_VID_RND (1<<9) /* Random VLAN ID */ 198 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 199 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 200 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 201 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 202 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 203 #define F_NODE (1<<15) /* Node memory alloc*/ 204 #define F_UDPCSUM (1<<16) /* Include UDP checksum */ 205 206 /* Thread control flag bits */ 207 #define T_STOP (1<<0) /* Stop run */ 208 #define T_RUN (1<<1) /* Start run */ 209 #define T_REMDEVALL (1<<2) /* Remove all devs */ 210 #define T_REMDEV (1<<3) /* Remove one dev */ 211 212 /* If lock -- protects updating of if_list */ 213 #define if_lock(t) spin_lock(&(t->if_lock)); 214 #define if_unlock(t) spin_unlock(&(t->if_lock)); 215 216 /* Used to help with determining the pkts on receive */ 217 #define PKTGEN_MAGIC 0xbe9be955 218 #define PG_PROC_DIR "pktgen" 219 #define PGCTRL "pgctrl" 220 221 #define MAX_CFLOWS 65536 222 223 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 224 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 225 226 struct flow_state { 227 __be32 cur_daddr; 228 int count; 229 #ifdef CONFIG_XFRM 230 struct xfrm_state *x; 231 #endif 232 __u32 flags; 233 }; 234 235 /* flow flag bits */ 236 #define F_INIT (1<<0) /* flow has been initialized */ 237 238 struct pktgen_dev { 239 /* 240 * Try to keep frequent/infrequent used vars. separated. 241 */ 242 struct proc_dir_entry *entry; /* proc file */ 243 struct pktgen_thread *pg_thread;/* the owner */ 244 struct list_head list; /* chaining in the thread's run-queue */ 245 struct rcu_head rcu; /* freed by RCU */ 246 247 int running; /* if false, the test will stop */ 248 249 /* If min != max, then we will either do a linear iteration, or 250 * we will do a random selection from within the range. 251 */ 252 __u32 flags; 253 int removal_mark; /* non-zero => the device is marked for 254 * removal by worker thread */ 255 256 int min_pkt_size; 257 int max_pkt_size; 258 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 259 int nfrags; 260 struct page *page; 261 u64 delay; /* nano-seconds */ 262 263 __u64 count; /* Default No packets to send */ 264 __u64 sofar; /* How many pkts we've sent so far */ 265 __u64 tx_bytes; /* How many bytes we've transmitted */ 266 __u64 errors; /* Errors when trying to transmit, */ 267 268 /* runtime counters relating to clone_skb */ 269 270 __u64 allocated_skbs; 271 __u32 clone_count; 272 int last_ok; /* Was last skb sent? 273 * Or a failed transmit of some sort? 274 * This will keep sequence numbers in order 275 */ 276 ktime_t next_tx; 277 ktime_t started_at; 278 ktime_t stopped_at; 279 u64 idle_acc; /* nano-seconds */ 280 281 __u32 seq_num; 282 283 int clone_skb; /* 284 * Use multiple SKBs during packet gen. 285 * If this number is greater than 1, then 286 * that many copies of the same packet will be 287 * sent before a new packet is allocated. 288 * If you want to send 1024 identical packets 289 * before creating a new packet, 290 * set clone_skb to 1024. 291 */ 292 293 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 294 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 295 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 296 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 297 298 struct in6_addr in6_saddr; 299 struct in6_addr in6_daddr; 300 struct in6_addr cur_in6_daddr; 301 struct in6_addr cur_in6_saddr; 302 /* For ranges */ 303 struct in6_addr min_in6_daddr; 304 struct in6_addr max_in6_daddr; 305 struct in6_addr min_in6_saddr; 306 struct in6_addr max_in6_saddr; 307 308 /* If we're doing ranges, random or incremental, then this 309 * defines the min/max for those ranges. 310 */ 311 __be32 saddr_min; /* inclusive, source IP address */ 312 __be32 saddr_max; /* exclusive, source IP address */ 313 __be32 daddr_min; /* inclusive, dest IP address */ 314 __be32 daddr_max; /* exclusive, dest IP address */ 315 316 __u16 udp_src_min; /* inclusive, source UDP port */ 317 __u16 udp_src_max; /* exclusive, source UDP port */ 318 __u16 udp_dst_min; /* inclusive, dest UDP port */ 319 __u16 udp_dst_max; /* exclusive, dest UDP port */ 320 321 /* DSCP + ECN */ 322 __u8 tos; /* six MSB of (former) IPv4 TOS 323 are for dscp codepoint */ 324 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 325 (see RFC 3260, sec. 4) */ 326 327 /* MPLS */ 328 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 329 __be32 labels[MAX_MPLS_LABELS]; 330 331 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 332 __u8 vlan_p; 333 __u8 vlan_cfi; 334 __u16 vlan_id; /* 0xffff means no vlan tag */ 335 336 __u8 svlan_p; 337 __u8 svlan_cfi; 338 __u16 svlan_id; /* 0xffff means no svlan tag */ 339 340 __u32 src_mac_count; /* How many MACs to iterate through */ 341 __u32 dst_mac_count; /* How many MACs to iterate through */ 342 343 unsigned char dst_mac[ETH_ALEN]; 344 unsigned char src_mac[ETH_ALEN]; 345 346 __u32 cur_dst_mac_offset; 347 __u32 cur_src_mac_offset; 348 __be32 cur_saddr; 349 __be32 cur_daddr; 350 __u16 ip_id; 351 __u16 cur_udp_dst; 352 __u16 cur_udp_src; 353 __u16 cur_queue_map; 354 __u32 cur_pkt_size; 355 __u32 last_pkt_size; 356 357 __u8 hh[14]; 358 /* = { 359 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 360 361 We fill in SRC address later 362 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 363 0x08, 0x00 364 }; 365 */ 366 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 367 368 struct sk_buff *skb; /* skb we are to transmit next, used for when we 369 * are transmitting the same one multiple times 370 */ 371 struct net_device *odev; /* The out-going device. 372 * Note that the device should have it's 373 * pg_info pointer pointing back to this 374 * device. 375 * Set when the user specifies the out-going 376 * device name (not when the inject is 377 * started as it used to do.) 378 */ 379 char odevname[32]; 380 struct flow_state *flows; 381 unsigned int cflows; /* Concurrent flows (config) */ 382 unsigned int lflow; /* Flow length (config) */ 383 unsigned int nflows; /* accumulated flows (stats) */ 384 unsigned int curfl; /* current sequenced flow (state)*/ 385 386 u16 queue_map_min; 387 u16 queue_map_max; 388 __u32 skb_priority; /* skb priority field */ 389 int node; /* Memory node */ 390 391 #ifdef CONFIG_XFRM 392 __u8 ipsmode; /* IPSEC mode (config) */ 393 __u8 ipsproto; /* IPSEC type (config) */ 394 __u32 spi; 395 struct dst_entry dst; 396 struct dst_ops dstops; 397 #endif 398 char result[512]; 399 }; 400 401 struct pktgen_hdr { 402 __be32 pgh_magic; 403 __be32 seq_num; 404 __be32 tv_sec; 405 __be32 tv_usec; 406 }; 407 408 409 static int pg_net_id __read_mostly; 410 411 struct pktgen_net { 412 struct net *net; 413 struct proc_dir_entry *proc_dir; 414 struct list_head pktgen_threads; 415 bool pktgen_exiting; 416 }; 417 418 struct pktgen_thread { 419 spinlock_t if_lock; /* for list of devices */ 420 struct list_head if_list; /* All device here */ 421 struct list_head th_list; 422 struct task_struct *tsk; 423 char result[512]; 424 425 /* Field for thread to receive "posted" events terminate, 426 stop ifs etc. */ 427 428 u32 control; 429 int cpu; 430 431 wait_queue_head_t queue; 432 struct completion start_done; 433 struct pktgen_net *net; 434 }; 435 436 #define REMOVE 1 437 #define FIND 0 438 439 static const char version[] = 440 "Packet Generator for packet performance testing. " 441 "Version: " VERSION "\n"; 442 443 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 444 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 445 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 446 const char *ifname, bool exact); 447 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 448 static void pktgen_run_all_threads(struct pktgen_net *pn); 449 static void pktgen_reset_all_threads(struct pktgen_net *pn); 450 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); 451 452 static void pktgen_stop(struct pktgen_thread *t); 453 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 454 455 /* Module parameters, defaults. */ 456 static int pg_count_d __read_mostly = 1000; 457 static int pg_delay_d __read_mostly; 458 static int pg_clone_skb_d __read_mostly; 459 static int debug __read_mostly; 460 461 static DEFINE_MUTEX(pktgen_thread_lock); 462 463 static struct notifier_block pktgen_notifier_block = { 464 .notifier_call = pktgen_device_event, 465 }; 466 467 /* 468 * /proc handling functions 469 * 470 */ 471 472 static int pgctrl_show(struct seq_file *seq, void *v) 473 { 474 seq_puts(seq, version); 475 return 0; 476 } 477 478 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 479 size_t count, loff_t *ppos) 480 { 481 char data[128]; 482 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 483 484 if (!capable(CAP_NET_ADMIN)) 485 return -EPERM; 486 487 if (count == 0) 488 return -EINVAL; 489 490 if (count > sizeof(data)) 491 count = sizeof(data); 492 493 if (copy_from_user(data, buf, count)) 494 return -EFAULT; 495 496 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */ 497 498 if (!strcmp(data, "stop")) 499 pktgen_stop_all_threads_ifs(pn); 500 501 else if (!strcmp(data, "start")) 502 pktgen_run_all_threads(pn); 503 504 else if (!strcmp(data, "reset")) 505 pktgen_reset_all_threads(pn); 506 507 else 508 pr_warning("Unknown command: %s\n", data); 509 510 return count; 511 } 512 513 static int pgctrl_open(struct inode *inode, struct file *file) 514 { 515 return single_open(file, pgctrl_show, PDE_DATA(inode)); 516 } 517 518 static const struct file_operations pktgen_fops = { 519 .owner = THIS_MODULE, 520 .open = pgctrl_open, 521 .read = seq_read, 522 .llseek = seq_lseek, 523 .write = pgctrl_write, 524 .release = single_release, 525 }; 526 527 static int pktgen_if_show(struct seq_file *seq, void *v) 528 { 529 const struct pktgen_dev *pkt_dev = seq->private; 530 ktime_t stopped; 531 u64 idle; 532 533 seq_printf(seq, 534 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 535 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 536 pkt_dev->max_pkt_size); 537 538 seq_printf(seq, 539 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 540 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 541 pkt_dev->clone_skb, pkt_dev->odevname); 542 543 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 544 pkt_dev->lflow); 545 546 seq_printf(seq, 547 " queue_map_min: %u queue_map_max: %u\n", 548 pkt_dev->queue_map_min, 549 pkt_dev->queue_map_max); 550 551 if (pkt_dev->skb_priority) 552 seq_printf(seq, " skb_priority: %u\n", 553 pkt_dev->skb_priority); 554 555 if (pkt_dev->flags & F_IPV6) { 556 seq_printf(seq, 557 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 558 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 559 &pkt_dev->in6_saddr, 560 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 561 &pkt_dev->in6_daddr, 562 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 563 } else { 564 seq_printf(seq, 565 " dst_min: %s dst_max: %s\n", 566 pkt_dev->dst_min, pkt_dev->dst_max); 567 seq_printf(seq, 568 " src_min: %s src_max: %s\n", 569 pkt_dev->src_min, pkt_dev->src_max); 570 } 571 572 seq_puts(seq, " src_mac: "); 573 574 seq_printf(seq, "%pM ", 575 is_zero_ether_addr(pkt_dev->src_mac) ? 576 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 577 578 seq_puts(seq, "dst_mac: "); 579 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 580 581 seq_printf(seq, 582 " udp_src_min: %d udp_src_max: %d" 583 " udp_dst_min: %d udp_dst_max: %d\n", 584 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 585 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 586 587 seq_printf(seq, 588 " src_mac_count: %d dst_mac_count: %d\n", 589 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 590 591 if (pkt_dev->nr_labels) { 592 unsigned int i; 593 seq_puts(seq, " mpls: "); 594 for (i = 0; i < pkt_dev->nr_labels; i++) 595 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 596 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 597 } 598 599 if (pkt_dev->vlan_id != 0xffff) 600 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 601 pkt_dev->vlan_id, pkt_dev->vlan_p, 602 pkt_dev->vlan_cfi); 603 604 if (pkt_dev->svlan_id != 0xffff) 605 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 606 pkt_dev->svlan_id, pkt_dev->svlan_p, 607 pkt_dev->svlan_cfi); 608 609 if (pkt_dev->tos) 610 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 611 612 if (pkt_dev->traffic_class) 613 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 614 615 if (pkt_dev->node >= 0) 616 seq_printf(seq, " node: %d\n", pkt_dev->node); 617 618 seq_puts(seq, " Flags: "); 619 620 if (pkt_dev->flags & F_IPV6) 621 seq_puts(seq, "IPV6 "); 622 623 if (pkt_dev->flags & F_IPSRC_RND) 624 seq_puts(seq, "IPSRC_RND "); 625 626 if (pkt_dev->flags & F_IPDST_RND) 627 seq_puts(seq, "IPDST_RND "); 628 629 if (pkt_dev->flags & F_TXSIZE_RND) 630 seq_puts(seq, "TXSIZE_RND "); 631 632 if (pkt_dev->flags & F_UDPSRC_RND) 633 seq_puts(seq, "UDPSRC_RND "); 634 635 if (pkt_dev->flags & F_UDPDST_RND) 636 seq_puts(seq, "UDPDST_RND "); 637 638 if (pkt_dev->flags & F_UDPCSUM) 639 seq_puts(seq, "UDPCSUM "); 640 641 if (pkt_dev->flags & F_MPLS_RND) 642 seq_puts(seq, "MPLS_RND "); 643 644 if (pkt_dev->flags & F_QUEUE_MAP_RND) 645 seq_puts(seq, "QUEUE_MAP_RND "); 646 647 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 648 seq_puts(seq, "QUEUE_MAP_CPU "); 649 650 if (pkt_dev->cflows) { 651 if (pkt_dev->flags & F_FLOW_SEQ) 652 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/ 653 else 654 seq_puts(seq, "FLOW_RND "); 655 } 656 657 #ifdef CONFIG_XFRM 658 if (pkt_dev->flags & F_IPSEC_ON) { 659 seq_puts(seq, "IPSEC "); 660 if (pkt_dev->spi) 661 seq_printf(seq, "spi:%u", pkt_dev->spi); 662 } 663 #endif 664 665 if (pkt_dev->flags & F_MACSRC_RND) 666 seq_puts(seq, "MACSRC_RND "); 667 668 if (pkt_dev->flags & F_MACDST_RND) 669 seq_puts(seq, "MACDST_RND "); 670 671 if (pkt_dev->flags & F_VID_RND) 672 seq_puts(seq, "VID_RND "); 673 674 if (pkt_dev->flags & F_SVID_RND) 675 seq_puts(seq, "SVID_RND "); 676 677 if (pkt_dev->flags & F_NODE) 678 seq_puts(seq, "NODE_ALLOC "); 679 680 seq_puts(seq, "\n"); 681 682 /* not really stopped, more like last-running-at */ 683 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 684 idle = pkt_dev->idle_acc; 685 do_div(idle, NSEC_PER_USEC); 686 687 seq_printf(seq, 688 "Current:\n pkts-sofar: %llu errors: %llu\n", 689 (unsigned long long)pkt_dev->sofar, 690 (unsigned long long)pkt_dev->errors); 691 692 seq_printf(seq, 693 " started: %lluus stopped: %lluus idle: %lluus\n", 694 (unsigned long long) ktime_to_us(pkt_dev->started_at), 695 (unsigned long long) ktime_to_us(stopped), 696 (unsigned long long) idle); 697 698 seq_printf(seq, 699 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 700 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 701 pkt_dev->cur_src_mac_offset); 702 703 if (pkt_dev->flags & F_IPV6) { 704 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 705 &pkt_dev->cur_in6_saddr, 706 &pkt_dev->cur_in6_daddr); 707 } else 708 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 709 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 710 711 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 712 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 713 714 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 715 716 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 717 718 if (pkt_dev->result[0]) 719 seq_printf(seq, "Result: %s\n", pkt_dev->result); 720 else 721 seq_puts(seq, "Result: Idle\n"); 722 723 return 0; 724 } 725 726 727 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 728 __u32 *num) 729 { 730 int i = 0; 731 *num = 0; 732 733 for (; i < maxlen; i++) { 734 int value; 735 char c; 736 *num <<= 4; 737 if (get_user(c, &user_buffer[i])) 738 return -EFAULT; 739 value = hex_to_bin(c); 740 if (value >= 0) 741 *num |= value; 742 else 743 break; 744 } 745 return i; 746 } 747 748 static int count_trail_chars(const char __user * user_buffer, 749 unsigned int maxlen) 750 { 751 int i; 752 753 for (i = 0; i < maxlen; i++) { 754 char c; 755 if (get_user(c, &user_buffer[i])) 756 return -EFAULT; 757 switch (c) { 758 case '\"': 759 case '\n': 760 case '\r': 761 case '\t': 762 case ' ': 763 case '=': 764 break; 765 default: 766 goto done; 767 } 768 } 769 done: 770 return i; 771 } 772 773 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 774 unsigned long *num) 775 { 776 int i; 777 *num = 0; 778 779 for (i = 0; i < maxlen; i++) { 780 char c; 781 if (get_user(c, &user_buffer[i])) 782 return -EFAULT; 783 if ((c >= '0') && (c <= '9')) { 784 *num *= 10; 785 *num += c - '0'; 786 } else 787 break; 788 } 789 return i; 790 } 791 792 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 793 { 794 int i; 795 796 for (i = 0; i < maxlen; i++) { 797 char c; 798 if (get_user(c, &user_buffer[i])) 799 return -EFAULT; 800 switch (c) { 801 case '\"': 802 case '\n': 803 case '\r': 804 case '\t': 805 case ' ': 806 goto done_str; 807 default: 808 break; 809 } 810 } 811 done_str: 812 return i; 813 } 814 815 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 816 { 817 unsigned int n = 0; 818 char c; 819 ssize_t i = 0; 820 int len; 821 822 pkt_dev->nr_labels = 0; 823 do { 824 __u32 tmp; 825 len = hex32_arg(&buffer[i], 8, &tmp); 826 if (len <= 0) 827 return len; 828 pkt_dev->labels[n] = htonl(tmp); 829 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 830 pkt_dev->flags |= F_MPLS_RND; 831 i += len; 832 if (get_user(c, &buffer[i])) 833 return -EFAULT; 834 i++; 835 n++; 836 if (n >= MAX_MPLS_LABELS) 837 return -E2BIG; 838 } while (c == ','); 839 840 pkt_dev->nr_labels = n; 841 return i; 842 } 843 844 static ssize_t pktgen_if_write(struct file *file, 845 const char __user * user_buffer, size_t count, 846 loff_t * offset) 847 { 848 struct seq_file *seq = file->private_data; 849 struct pktgen_dev *pkt_dev = seq->private; 850 int i, max, len; 851 char name[16], valstr[32]; 852 unsigned long value = 0; 853 char *pg_result = NULL; 854 int tmp = 0; 855 char buf[128]; 856 857 pg_result = &(pkt_dev->result[0]); 858 859 if (count < 1) { 860 pr_warning("wrong command format\n"); 861 return -EINVAL; 862 } 863 864 max = count; 865 tmp = count_trail_chars(user_buffer, max); 866 if (tmp < 0) { 867 pr_warning("illegal format\n"); 868 return tmp; 869 } 870 i = tmp; 871 872 /* Read variable name */ 873 874 len = strn_len(&user_buffer[i], sizeof(name) - 1); 875 if (len < 0) 876 return len; 877 878 memset(name, 0, sizeof(name)); 879 if (copy_from_user(name, &user_buffer[i], len)) 880 return -EFAULT; 881 i += len; 882 883 max = count - i; 884 len = count_trail_chars(&user_buffer[i], max); 885 if (len < 0) 886 return len; 887 888 i += len; 889 890 if (debug) { 891 size_t copy = min_t(size_t, count, 1023); 892 char tb[copy + 1]; 893 if (copy_from_user(tb, user_buffer, copy)) 894 return -EFAULT; 895 tb[copy] = 0; 896 pr_debug("%s,%lu buffer -:%s:-\n", 897 name, (unsigned long)count, tb); 898 } 899 900 if (!strcmp(name, "min_pkt_size")) { 901 len = num_arg(&user_buffer[i], 10, &value); 902 if (len < 0) 903 return len; 904 905 i += len; 906 if (value < 14 + 20 + 8) 907 value = 14 + 20 + 8; 908 if (value != pkt_dev->min_pkt_size) { 909 pkt_dev->min_pkt_size = value; 910 pkt_dev->cur_pkt_size = value; 911 } 912 sprintf(pg_result, "OK: min_pkt_size=%u", 913 pkt_dev->min_pkt_size); 914 return count; 915 } 916 917 if (!strcmp(name, "max_pkt_size")) { 918 len = num_arg(&user_buffer[i], 10, &value); 919 if (len < 0) 920 return len; 921 922 i += len; 923 if (value < 14 + 20 + 8) 924 value = 14 + 20 + 8; 925 if (value != pkt_dev->max_pkt_size) { 926 pkt_dev->max_pkt_size = value; 927 pkt_dev->cur_pkt_size = value; 928 } 929 sprintf(pg_result, "OK: max_pkt_size=%u", 930 pkt_dev->max_pkt_size); 931 return count; 932 } 933 934 /* Shortcut for min = max */ 935 936 if (!strcmp(name, "pkt_size")) { 937 len = num_arg(&user_buffer[i], 10, &value); 938 if (len < 0) 939 return len; 940 941 i += len; 942 if (value < 14 + 20 + 8) 943 value = 14 + 20 + 8; 944 if (value != pkt_dev->min_pkt_size) { 945 pkt_dev->min_pkt_size = value; 946 pkt_dev->max_pkt_size = value; 947 pkt_dev->cur_pkt_size = value; 948 } 949 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 950 return count; 951 } 952 953 if (!strcmp(name, "debug")) { 954 len = num_arg(&user_buffer[i], 10, &value); 955 if (len < 0) 956 return len; 957 958 i += len; 959 debug = value; 960 sprintf(pg_result, "OK: debug=%u", debug); 961 return count; 962 } 963 964 if (!strcmp(name, "frags")) { 965 len = num_arg(&user_buffer[i], 10, &value); 966 if (len < 0) 967 return len; 968 969 i += len; 970 pkt_dev->nfrags = value; 971 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 972 return count; 973 } 974 if (!strcmp(name, "delay")) { 975 len = num_arg(&user_buffer[i], 10, &value); 976 if (len < 0) 977 return len; 978 979 i += len; 980 if (value == 0x7FFFFFFF) 981 pkt_dev->delay = ULLONG_MAX; 982 else 983 pkt_dev->delay = (u64)value; 984 985 sprintf(pg_result, "OK: delay=%llu", 986 (unsigned long long) pkt_dev->delay); 987 return count; 988 } 989 if (!strcmp(name, "rate")) { 990 len = num_arg(&user_buffer[i], 10, &value); 991 if (len < 0) 992 return len; 993 994 i += len; 995 if (!value) 996 return len; 997 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 998 if (debug) 999 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1000 1001 sprintf(pg_result, "OK: rate=%lu", value); 1002 return count; 1003 } 1004 if (!strcmp(name, "ratep")) { 1005 len = num_arg(&user_buffer[i], 10, &value); 1006 if (len < 0) 1007 return len; 1008 1009 i += len; 1010 if (!value) 1011 return len; 1012 pkt_dev->delay = NSEC_PER_SEC/value; 1013 if (debug) 1014 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1015 1016 sprintf(pg_result, "OK: rate=%lu", value); 1017 return count; 1018 } 1019 if (!strcmp(name, "udp_src_min")) { 1020 len = num_arg(&user_buffer[i], 10, &value); 1021 if (len < 0) 1022 return len; 1023 1024 i += len; 1025 if (value != pkt_dev->udp_src_min) { 1026 pkt_dev->udp_src_min = value; 1027 pkt_dev->cur_udp_src = value; 1028 } 1029 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1030 return count; 1031 } 1032 if (!strcmp(name, "udp_dst_min")) { 1033 len = num_arg(&user_buffer[i], 10, &value); 1034 if (len < 0) 1035 return len; 1036 1037 i += len; 1038 if (value != pkt_dev->udp_dst_min) { 1039 pkt_dev->udp_dst_min = value; 1040 pkt_dev->cur_udp_dst = value; 1041 } 1042 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1043 return count; 1044 } 1045 if (!strcmp(name, "udp_src_max")) { 1046 len = num_arg(&user_buffer[i], 10, &value); 1047 if (len < 0) 1048 return len; 1049 1050 i += len; 1051 if (value != pkt_dev->udp_src_max) { 1052 pkt_dev->udp_src_max = value; 1053 pkt_dev->cur_udp_src = value; 1054 } 1055 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1056 return count; 1057 } 1058 if (!strcmp(name, "udp_dst_max")) { 1059 len = num_arg(&user_buffer[i], 10, &value); 1060 if (len < 0) 1061 return len; 1062 1063 i += len; 1064 if (value != pkt_dev->udp_dst_max) { 1065 pkt_dev->udp_dst_max = value; 1066 pkt_dev->cur_udp_dst = value; 1067 } 1068 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1069 return count; 1070 } 1071 if (!strcmp(name, "clone_skb")) { 1072 len = num_arg(&user_buffer[i], 10, &value); 1073 if (len < 0) 1074 return len; 1075 if ((value > 0) && 1076 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1077 return -ENOTSUPP; 1078 i += len; 1079 pkt_dev->clone_skb = value; 1080 1081 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1082 return count; 1083 } 1084 if (!strcmp(name, "count")) { 1085 len = num_arg(&user_buffer[i], 10, &value); 1086 if (len < 0) 1087 return len; 1088 1089 i += len; 1090 pkt_dev->count = value; 1091 sprintf(pg_result, "OK: count=%llu", 1092 (unsigned long long)pkt_dev->count); 1093 return count; 1094 } 1095 if (!strcmp(name, "src_mac_count")) { 1096 len = num_arg(&user_buffer[i], 10, &value); 1097 if (len < 0) 1098 return len; 1099 1100 i += len; 1101 if (pkt_dev->src_mac_count != value) { 1102 pkt_dev->src_mac_count = value; 1103 pkt_dev->cur_src_mac_offset = 0; 1104 } 1105 sprintf(pg_result, "OK: src_mac_count=%d", 1106 pkt_dev->src_mac_count); 1107 return count; 1108 } 1109 if (!strcmp(name, "dst_mac_count")) { 1110 len = num_arg(&user_buffer[i], 10, &value); 1111 if (len < 0) 1112 return len; 1113 1114 i += len; 1115 if (pkt_dev->dst_mac_count != value) { 1116 pkt_dev->dst_mac_count = value; 1117 pkt_dev->cur_dst_mac_offset = 0; 1118 } 1119 sprintf(pg_result, "OK: dst_mac_count=%d", 1120 pkt_dev->dst_mac_count); 1121 return count; 1122 } 1123 if (!strcmp(name, "node")) { 1124 len = num_arg(&user_buffer[i], 10, &value); 1125 if (len < 0) 1126 return len; 1127 1128 i += len; 1129 1130 if (node_possible(value)) { 1131 pkt_dev->node = value; 1132 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1133 if (pkt_dev->page) { 1134 put_page(pkt_dev->page); 1135 pkt_dev->page = NULL; 1136 } 1137 } 1138 else 1139 sprintf(pg_result, "ERROR: node not possible"); 1140 return count; 1141 } 1142 if (!strcmp(name, "flag")) { 1143 char f[32]; 1144 memset(f, 0, 32); 1145 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1146 if (len < 0) 1147 return len; 1148 1149 if (copy_from_user(f, &user_buffer[i], len)) 1150 return -EFAULT; 1151 i += len; 1152 if (strcmp(f, "IPSRC_RND") == 0) 1153 pkt_dev->flags |= F_IPSRC_RND; 1154 1155 else if (strcmp(f, "!IPSRC_RND") == 0) 1156 pkt_dev->flags &= ~F_IPSRC_RND; 1157 1158 else if (strcmp(f, "TXSIZE_RND") == 0) 1159 pkt_dev->flags |= F_TXSIZE_RND; 1160 1161 else if (strcmp(f, "!TXSIZE_RND") == 0) 1162 pkt_dev->flags &= ~F_TXSIZE_RND; 1163 1164 else if (strcmp(f, "IPDST_RND") == 0) 1165 pkt_dev->flags |= F_IPDST_RND; 1166 1167 else if (strcmp(f, "!IPDST_RND") == 0) 1168 pkt_dev->flags &= ~F_IPDST_RND; 1169 1170 else if (strcmp(f, "UDPSRC_RND") == 0) 1171 pkt_dev->flags |= F_UDPSRC_RND; 1172 1173 else if (strcmp(f, "!UDPSRC_RND") == 0) 1174 pkt_dev->flags &= ~F_UDPSRC_RND; 1175 1176 else if (strcmp(f, "UDPDST_RND") == 0) 1177 pkt_dev->flags |= F_UDPDST_RND; 1178 1179 else if (strcmp(f, "!UDPDST_RND") == 0) 1180 pkt_dev->flags &= ~F_UDPDST_RND; 1181 1182 else if (strcmp(f, "MACSRC_RND") == 0) 1183 pkt_dev->flags |= F_MACSRC_RND; 1184 1185 else if (strcmp(f, "!MACSRC_RND") == 0) 1186 pkt_dev->flags &= ~F_MACSRC_RND; 1187 1188 else if (strcmp(f, "MACDST_RND") == 0) 1189 pkt_dev->flags |= F_MACDST_RND; 1190 1191 else if (strcmp(f, "!MACDST_RND") == 0) 1192 pkt_dev->flags &= ~F_MACDST_RND; 1193 1194 else if (strcmp(f, "MPLS_RND") == 0) 1195 pkt_dev->flags |= F_MPLS_RND; 1196 1197 else if (strcmp(f, "!MPLS_RND") == 0) 1198 pkt_dev->flags &= ~F_MPLS_RND; 1199 1200 else if (strcmp(f, "VID_RND") == 0) 1201 pkt_dev->flags |= F_VID_RND; 1202 1203 else if (strcmp(f, "!VID_RND") == 0) 1204 pkt_dev->flags &= ~F_VID_RND; 1205 1206 else if (strcmp(f, "SVID_RND") == 0) 1207 pkt_dev->flags |= F_SVID_RND; 1208 1209 else if (strcmp(f, "!SVID_RND") == 0) 1210 pkt_dev->flags &= ~F_SVID_RND; 1211 1212 else if (strcmp(f, "FLOW_SEQ") == 0) 1213 pkt_dev->flags |= F_FLOW_SEQ; 1214 1215 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1216 pkt_dev->flags |= F_QUEUE_MAP_RND; 1217 1218 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1219 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1220 1221 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1222 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1223 1224 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1225 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1226 #ifdef CONFIG_XFRM 1227 else if (strcmp(f, "IPSEC") == 0) 1228 pkt_dev->flags |= F_IPSEC_ON; 1229 #endif 1230 1231 else if (strcmp(f, "!IPV6") == 0) 1232 pkt_dev->flags &= ~F_IPV6; 1233 1234 else if (strcmp(f, "NODE_ALLOC") == 0) 1235 pkt_dev->flags |= F_NODE; 1236 1237 else if (strcmp(f, "!NODE_ALLOC") == 0) 1238 pkt_dev->flags &= ~F_NODE; 1239 1240 else if (strcmp(f, "UDPCSUM") == 0) 1241 pkt_dev->flags |= F_UDPCSUM; 1242 1243 else if (strcmp(f, "!UDPCSUM") == 0) 1244 pkt_dev->flags &= ~F_UDPCSUM; 1245 1246 else { 1247 sprintf(pg_result, 1248 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1249 f, 1250 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1251 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " 1252 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " 1253 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " 1254 #ifdef CONFIG_XFRM 1255 "IPSEC, " 1256 #endif 1257 "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_puts(seq, "Running: "); 1740 1741 rcu_read_lock(); 1742 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1743 if (pkt_dev->running) 1744 seq_printf(seq, "%s ", pkt_dev->odevname); 1745 1746 seq_puts(seq, "\nStopped: "); 1747 1748 list_for_each_entry_rcu(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_puts(seq, "\nResult: NA\n"); 1756 1757 rcu_read_unlock(); 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 pkt_dev->removal_mark = 1; 1883 t->control |= T_REMDEV; 1884 } 1885 break; 1886 } 1887 } 1888 return pkt_dev; 1889 } 1890 1891 /* 1892 * mark a device for removal 1893 */ 1894 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 1895 { 1896 struct pktgen_dev *pkt_dev = NULL; 1897 const int max_tries = 10, msec_per_try = 125; 1898 int i = 0; 1899 1900 mutex_lock(&pktgen_thread_lock); 1901 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1902 1903 while (1) { 1904 1905 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 1906 if (pkt_dev == NULL) 1907 break; /* success */ 1908 1909 mutex_unlock(&pktgen_thread_lock); 1910 pr_debug("%s: waiting for %s to disappear....\n", 1911 __func__, ifname); 1912 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1913 mutex_lock(&pktgen_thread_lock); 1914 1915 if (++i >= max_tries) { 1916 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1917 __func__, msec_per_try * i, ifname); 1918 break; 1919 } 1920 1921 } 1922 1923 mutex_unlock(&pktgen_thread_lock); 1924 } 1925 1926 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 1927 { 1928 struct pktgen_thread *t; 1929 1930 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 1931 struct pktgen_dev *pkt_dev; 1932 1933 rcu_read_lock(); 1934 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 1935 if (pkt_dev->odev != dev) 1936 continue; 1937 1938 proc_remove(pkt_dev->entry); 1939 1940 pkt_dev->entry = proc_create_data(dev->name, 0600, 1941 pn->proc_dir, 1942 &pktgen_if_fops, 1943 pkt_dev); 1944 if (!pkt_dev->entry) 1945 pr_err("can't move proc entry for '%s'\n", 1946 dev->name); 1947 break; 1948 } 1949 rcu_read_unlock(); 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 rcu_read_lock(); 3002 list_for_each_entry_rcu(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->skb = NULL; 3012 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3013 3014 set_pkt_overhead(pkt_dev); 3015 3016 strcpy(pkt_dev->result, "Starting"); 3017 pkt_dev->running = 1; /* Cranke yeself! */ 3018 started++; 3019 } else 3020 strcpy(pkt_dev->result, "Error starting"); 3021 } 3022 rcu_read_unlock(); 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 rcu_read_lock(); 3046 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 3047 if (pkt_dev->running) { 3048 rcu_read_unlock(); 3049 return 1; 3050 } 3051 rcu_read_unlock(); 3052 return 0; 3053 } 3054 3055 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3056 { 3057 while (thread_is_running(t)) { 3058 3059 msleep_interruptible(100); 3060 3061 if (signal_pending(current)) 3062 goto signal; 3063 } 3064 return 1; 3065 signal: 3066 return 0; 3067 } 3068 3069 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3070 { 3071 struct pktgen_thread *t; 3072 int sig = 1; 3073 3074 mutex_lock(&pktgen_thread_lock); 3075 3076 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3077 sig = pktgen_wait_thread_run(t); 3078 if (sig == 0) 3079 break; 3080 } 3081 3082 if (sig == 0) 3083 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3084 t->control |= (T_STOP); 3085 3086 mutex_unlock(&pktgen_thread_lock); 3087 return sig; 3088 } 3089 3090 static void pktgen_run_all_threads(struct pktgen_net *pn) 3091 { 3092 struct pktgen_thread *t; 3093 3094 func_enter(); 3095 3096 mutex_lock(&pktgen_thread_lock); 3097 3098 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3099 t->control |= (T_RUN); 3100 3101 mutex_unlock(&pktgen_thread_lock); 3102 3103 /* Propagate thread->control */ 3104 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3105 3106 pktgen_wait_all_threads_run(pn); 3107 } 3108 3109 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3110 { 3111 struct pktgen_thread *t; 3112 3113 func_enter(); 3114 3115 mutex_lock(&pktgen_thread_lock); 3116 3117 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3118 t->control |= (T_REMDEVALL); 3119 3120 mutex_unlock(&pktgen_thread_lock); 3121 3122 /* Propagate thread->control */ 3123 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3124 3125 pktgen_wait_all_threads_run(pn); 3126 } 3127 3128 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3129 { 3130 __u64 bps, mbps, pps; 3131 char *p = pkt_dev->result; 3132 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3133 pkt_dev->started_at); 3134 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3135 3136 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3137 (unsigned long long)ktime_to_us(elapsed), 3138 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3139 (unsigned long long)ktime_to_us(idle), 3140 (unsigned long long)pkt_dev->sofar, 3141 pkt_dev->cur_pkt_size, nr_frags); 3142 3143 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3144 ktime_to_ns(elapsed)); 3145 3146 bps = pps * 8 * pkt_dev->cur_pkt_size; 3147 3148 mbps = bps; 3149 do_div(mbps, 1000000); 3150 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3151 (unsigned long long)pps, 3152 (unsigned long long)mbps, 3153 (unsigned long long)bps, 3154 (unsigned long long)pkt_dev->errors); 3155 } 3156 3157 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3158 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3159 { 3160 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3161 3162 if (!pkt_dev->running) { 3163 pr_warning("interface: %s is already stopped\n", 3164 pkt_dev->odevname); 3165 return -EINVAL; 3166 } 3167 3168 pkt_dev->running = 0; 3169 kfree_skb(pkt_dev->skb); 3170 pkt_dev->skb = NULL; 3171 pkt_dev->stopped_at = ktime_get(); 3172 3173 show_results(pkt_dev, nr_frags); 3174 3175 return 0; 3176 } 3177 3178 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3179 { 3180 struct pktgen_dev *pkt_dev, *best = NULL; 3181 3182 rcu_read_lock(); 3183 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3184 if (!pkt_dev->running) 3185 continue; 3186 if (best == NULL) 3187 best = pkt_dev; 3188 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3189 best = pkt_dev; 3190 } 3191 rcu_read_unlock(); 3192 3193 return best; 3194 } 3195 3196 static void pktgen_stop(struct pktgen_thread *t) 3197 { 3198 struct pktgen_dev *pkt_dev; 3199 3200 func_enter(); 3201 3202 rcu_read_lock(); 3203 3204 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3205 pktgen_stop_device(pkt_dev); 3206 } 3207 3208 rcu_read_unlock(); 3209 } 3210 3211 /* 3212 * one of our devices needs to be removed - find it 3213 * and remove it 3214 */ 3215 static void pktgen_rem_one_if(struct pktgen_thread *t) 3216 { 3217 struct list_head *q, *n; 3218 struct pktgen_dev *cur; 3219 3220 func_enter(); 3221 3222 list_for_each_safe(q, n, &t->if_list) { 3223 cur = list_entry(q, struct pktgen_dev, list); 3224 3225 if (!cur->removal_mark) 3226 continue; 3227 3228 kfree_skb(cur->skb); 3229 cur->skb = NULL; 3230 3231 pktgen_remove_device(t, cur); 3232 3233 break; 3234 } 3235 } 3236 3237 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3238 { 3239 struct list_head *q, *n; 3240 struct pktgen_dev *cur; 3241 3242 func_enter(); 3243 3244 /* Remove all devices, free mem */ 3245 3246 list_for_each_safe(q, n, &t->if_list) { 3247 cur = list_entry(q, struct pktgen_dev, list); 3248 3249 kfree_skb(cur->skb); 3250 cur->skb = NULL; 3251 3252 pktgen_remove_device(t, cur); 3253 } 3254 } 3255 3256 static void pktgen_rem_thread(struct pktgen_thread *t) 3257 { 3258 /* Remove from the thread list */ 3259 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3260 } 3261 3262 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3263 { 3264 ktime_t idle_start = ktime_get(); 3265 schedule(); 3266 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3267 } 3268 3269 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3270 { 3271 ktime_t idle_start = ktime_get(); 3272 3273 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3274 if (signal_pending(current)) 3275 break; 3276 3277 if (need_resched()) 3278 pktgen_resched(pkt_dev); 3279 else 3280 cpu_relax(); 3281 } 3282 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3283 } 3284 3285 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3286 { 3287 struct net_device *odev = pkt_dev->odev; 3288 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3289 = odev->netdev_ops->ndo_start_xmit; 3290 struct netdev_queue *txq; 3291 u16 queue_map; 3292 int ret; 3293 3294 /* If device is offline, then don't send */ 3295 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3296 pktgen_stop_device(pkt_dev); 3297 return; 3298 } 3299 3300 /* This is max DELAY, this has special meaning of 3301 * "never transmit" 3302 */ 3303 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3304 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3305 return; 3306 } 3307 3308 /* If no skb or clone count exhausted then get new one */ 3309 if (!pkt_dev->skb || (pkt_dev->last_ok && 3310 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3311 /* build a new pkt */ 3312 kfree_skb(pkt_dev->skb); 3313 3314 pkt_dev->skb = fill_packet(odev, pkt_dev); 3315 if (pkt_dev->skb == NULL) { 3316 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3317 schedule(); 3318 pkt_dev->clone_count--; /* back out increment, OOM */ 3319 return; 3320 } 3321 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3322 pkt_dev->allocated_skbs++; 3323 pkt_dev->clone_count = 0; /* reset counter */ 3324 } 3325 3326 if (pkt_dev->delay && pkt_dev->last_ok) 3327 spin(pkt_dev, pkt_dev->next_tx); 3328 3329 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3330 txq = netdev_get_tx_queue(odev, queue_map); 3331 3332 local_bh_disable(); 3333 3334 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3335 3336 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3337 ret = NETDEV_TX_BUSY; 3338 pkt_dev->last_ok = 0; 3339 goto unlock; 3340 } 3341 atomic_inc(&(pkt_dev->skb->users)); 3342 ret = (*xmit)(pkt_dev->skb, odev); 3343 3344 switch (ret) { 3345 case NETDEV_TX_OK: 3346 txq_trans_update(txq); 3347 pkt_dev->last_ok = 1; 3348 pkt_dev->sofar++; 3349 pkt_dev->seq_num++; 3350 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3351 break; 3352 case NET_XMIT_DROP: 3353 case NET_XMIT_CN: 3354 case NET_XMIT_POLICED: 3355 /* skb has been consumed */ 3356 pkt_dev->errors++; 3357 break; 3358 default: /* Drivers are not supposed to return other values! */ 3359 net_info_ratelimited("%s xmit error: %d\n", 3360 pkt_dev->odevname, ret); 3361 pkt_dev->errors++; 3362 /* fallthru */ 3363 case NETDEV_TX_LOCKED: 3364 case NETDEV_TX_BUSY: 3365 /* Retry it next time */ 3366 atomic_dec(&(pkt_dev->skb->users)); 3367 pkt_dev->last_ok = 0; 3368 } 3369 unlock: 3370 HARD_TX_UNLOCK(odev, txq); 3371 3372 local_bh_enable(); 3373 3374 /* If pkt_dev->count is zero, then run forever */ 3375 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3376 pktgen_wait_for_skb(pkt_dev); 3377 3378 /* Done with this */ 3379 pktgen_stop_device(pkt_dev); 3380 } 3381 } 3382 3383 /* 3384 * Main loop of the thread goes here 3385 */ 3386 3387 static int pktgen_thread_worker(void *arg) 3388 { 3389 DEFINE_WAIT(wait); 3390 struct pktgen_thread *t = arg; 3391 struct pktgen_dev *pkt_dev = NULL; 3392 int cpu = t->cpu; 3393 3394 BUG_ON(smp_processor_id() != cpu); 3395 3396 init_waitqueue_head(&t->queue); 3397 complete(&t->start_done); 3398 3399 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3400 3401 set_freezable(); 3402 3403 __set_current_state(TASK_RUNNING); 3404 3405 while (!kthread_should_stop()) { 3406 pkt_dev = next_to_run(t); 3407 3408 if (unlikely(!pkt_dev && t->control == 0)) { 3409 if (t->net->pktgen_exiting) 3410 break; 3411 wait_event_interruptible_timeout(t->queue, 3412 t->control != 0, 3413 HZ/10); 3414 try_to_freeze(); 3415 continue; 3416 } 3417 3418 if (likely(pkt_dev)) { 3419 pktgen_xmit(pkt_dev); 3420 3421 if (need_resched()) 3422 pktgen_resched(pkt_dev); 3423 else 3424 cpu_relax(); 3425 } 3426 3427 if (t->control & T_STOP) { 3428 pktgen_stop(t); 3429 t->control &= ~(T_STOP); 3430 } 3431 3432 if (t->control & T_RUN) { 3433 pktgen_run(t); 3434 t->control &= ~(T_RUN); 3435 } 3436 3437 if (t->control & T_REMDEVALL) { 3438 pktgen_rem_all_ifs(t); 3439 t->control &= ~(T_REMDEVALL); 3440 } 3441 3442 if (t->control & T_REMDEV) { 3443 pktgen_rem_one_if(t); 3444 t->control &= ~(T_REMDEV); 3445 } 3446 3447 try_to_freeze(); 3448 } 3449 set_current_state(TASK_INTERRUPTIBLE); 3450 3451 pr_debug("%s stopping all device\n", t->tsk->comm); 3452 pktgen_stop(t); 3453 3454 pr_debug("%s removing all device\n", t->tsk->comm); 3455 pktgen_rem_all_ifs(t); 3456 3457 pr_debug("%s removing thread\n", t->tsk->comm); 3458 pktgen_rem_thread(t); 3459 3460 /* Wait for kthread_stop */ 3461 while (!kthread_should_stop()) { 3462 set_current_state(TASK_INTERRUPTIBLE); 3463 schedule(); 3464 } 3465 __set_current_state(TASK_RUNNING); 3466 3467 return 0; 3468 } 3469 3470 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3471 const char *ifname, bool exact) 3472 { 3473 struct pktgen_dev *p, *pkt_dev = NULL; 3474 size_t len = strlen(ifname); 3475 3476 rcu_read_lock(); 3477 list_for_each_entry_rcu(p, &t->if_list, list) 3478 if (strncmp(p->odevname, ifname, len) == 0) { 3479 if (p->odevname[len]) { 3480 if (exact || p->odevname[len] != '@') 3481 continue; 3482 } 3483 pkt_dev = p; 3484 break; 3485 } 3486 3487 rcu_read_unlock(); 3488 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3489 return pkt_dev; 3490 } 3491 3492 /* 3493 * Adds a dev at front of if_list. 3494 */ 3495 3496 static int add_dev_to_thread(struct pktgen_thread *t, 3497 struct pktgen_dev *pkt_dev) 3498 { 3499 int rv = 0; 3500 3501 /* This function cannot be called concurrently, as its called 3502 * under pktgen_thread_lock mutex, but it can run from 3503 * userspace on another CPU than the kthread. The if_lock() 3504 * is used here to sync with concurrent instances of 3505 * _rem_dev_from_if_list() invoked via kthread, which is also 3506 * updating the if_list */ 3507 if_lock(t); 3508 3509 if (pkt_dev->pg_thread) { 3510 pr_err("ERROR: already assigned to a thread\n"); 3511 rv = -EBUSY; 3512 goto out; 3513 } 3514 3515 pkt_dev->running = 0; 3516 pkt_dev->pg_thread = t; 3517 list_add_rcu(&pkt_dev->list, &t->if_list); 3518 3519 out: 3520 if_unlock(t); 3521 return rv; 3522 } 3523 3524 /* Called under thread lock */ 3525 3526 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3527 { 3528 struct pktgen_dev *pkt_dev; 3529 int err; 3530 int node = cpu_to_node(t->cpu); 3531 3532 /* We don't allow a device to be on several threads */ 3533 3534 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3535 if (pkt_dev) { 3536 pr_err("ERROR: interface already used\n"); 3537 return -EBUSY; 3538 } 3539 3540 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3541 if (!pkt_dev) 3542 return -ENOMEM; 3543 3544 strcpy(pkt_dev->odevname, ifname); 3545 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3546 node); 3547 if (pkt_dev->flows == NULL) { 3548 kfree(pkt_dev); 3549 return -ENOMEM; 3550 } 3551 3552 pkt_dev->removal_mark = 0; 3553 pkt_dev->nfrags = 0; 3554 pkt_dev->delay = pg_delay_d; 3555 pkt_dev->count = pg_count_d; 3556 pkt_dev->sofar = 0; 3557 pkt_dev->udp_src_min = 9; /* sink port */ 3558 pkt_dev->udp_src_max = 9; 3559 pkt_dev->udp_dst_min = 9; 3560 pkt_dev->udp_dst_max = 9; 3561 pkt_dev->vlan_p = 0; 3562 pkt_dev->vlan_cfi = 0; 3563 pkt_dev->vlan_id = 0xffff; 3564 pkt_dev->svlan_p = 0; 3565 pkt_dev->svlan_cfi = 0; 3566 pkt_dev->svlan_id = 0xffff; 3567 pkt_dev->node = -1; 3568 3569 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3570 if (err) 3571 goto out1; 3572 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3573 pkt_dev->clone_skb = pg_clone_skb_d; 3574 3575 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3576 &pktgen_if_fops, pkt_dev); 3577 if (!pkt_dev->entry) { 3578 pr_err("cannot create %s/%s procfs entry\n", 3579 PG_PROC_DIR, ifname); 3580 err = -EINVAL; 3581 goto out2; 3582 } 3583 #ifdef CONFIG_XFRM 3584 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3585 pkt_dev->ipsproto = IPPROTO_ESP; 3586 3587 /* xfrm tunnel mode needs additional dst to extract outter 3588 * ip header protocol/ttl/id field, here creat a phony one. 3589 * instead of looking for a valid rt, which definitely hurting 3590 * performance under such circumstance. 3591 */ 3592 pkt_dev->dstops.family = AF_INET; 3593 pkt_dev->dst.dev = pkt_dev->odev; 3594 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); 3595 pkt_dev->dst.child = &pkt_dev->dst; 3596 pkt_dev->dst.ops = &pkt_dev->dstops; 3597 #endif 3598 3599 return add_dev_to_thread(t, pkt_dev); 3600 out2: 3601 dev_put(pkt_dev->odev); 3602 out1: 3603 #ifdef CONFIG_XFRM 3604 free_SAs(pkt_dev); 3605 #endif 3606 vfree(pkt_dev->flows); 3607 kfree(pkt_dev); 3608 return err; 3609 } 3610 3611 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3612 { 3613 struct pktgen_thread *t; 3614 struct proc_dir_entry *pe; 3615 struct task_struct *p; 3616 3617 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3618 cpu_to_node(cpu)); 3619 if (!t) { 3620 pr_err("ERROR: out of memory, can't create new thread\n"); 3621 return -ENOMEM; 3622 } 3623 3624 spin_lock_init(&t->if_lock); 3625 t->cpu = cpu; 3626 3627 INIT_LIST_HEAD(&t->if_list); 3628 3629 list_add_tail(&t->th_list, &pn->pktgen_threads); 3630 init_completion(&t->start_done); 3631 3632 p = kthread_create_on_node(pktgen_thread_worker, 3633 t, 3634 cpu_to_node(cpu), 3635 "kpktgend_%d", cpu); 3636 if (IS_ERR(p)) { 3637 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3638 list_del(&t->th_list); 3639 kfree(t); 3640 return PTR_ERR(p); 3641 } 3642 kthread_bind(p, cpu); 3643 t->tsk = p; 3644 3645 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3646 &pktgen_thread_fops, t); 3647 if (!pe) { 3648 pr_err("cannot create %s/%s procfs entry\n", 3649 PG_PROC_DIR, t->tsk->comm); 3650 kthread_stop(p); 3651 list_del(&t->th_list); 3652 kfree(t); 3653 return -EINVAL; 3654 } 3655 3656 t->net = pn; 3657 wake_up_process(p); 3658 wait_for_completion(&t->start_done); 3659 3660 return 0; 3661 } 3662 3663 /* 3664 * Removes a device from the thread if_list. 3665 */ 3666 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3667 struct pktgen_dev *pkt_dev) 3668 { 3669 struct list_head *q, *n; 3670 struct pktgen_dev *p; 3671 3672 if_lock(t); 3673 list_for_each_safe(q, n, &t->if_list) { 3674 p = list_entry(q, struct pktgen_dev, list); 3675 if (p == pkt_dev) 3676 list_del_rcu(&p->list); 3677 } 3678 if_unlock(t); 3679 } 3680 3681 static int pktgen_remove_device(struct pktgen_thread *t, 3682 struct pktgen_dev *pkt_dev) 3683 { 3684 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3685 3686 if (pkt_dev->running) { 3687 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3688 pktgen_stop_device(pkt_dev); 3689 } 3690 3691 /* Dis-associate from the interface */ 3692 3693 if (pkt_dev->odev) { 3694 dev_put(pkt_dev->odev); 3695 pkt_dev->odev = NULL; 3696 } 3697 3698 /* Remove proc before if_list entry, because add_device uses 3699 * list to determine if interface already exist, avoid race 3700 * with proc_create_data() */ 3701 if (pkt_dev->entry) 3702 proc_remove(pkt_dev->entry); 3703 3704 /* And update the thread if_list */ 3705 _rem_dev_from_if_list(t, pkt_dev); 3706 3707 #ifdef CONFIG_XFRM 3708 free_SAs(pkt_dev); 3709 #endif 3710 vfree(pkt_dev->flows); 3711 if (pkt_dev->page) 3712 put_page(pkt_dev->page); 3713 kfree_rcu(pkt_dev, rcu); 3714 return 0; 3715 } 3716 3717 static int __net_init pg_net_init(struct net *net) 3718 { 3719 struct pktgen_net *pn = net_generic(net, pg_net_id); 3720 struct proc_dir_entry *pe; 3721 int cpu, ret = 0; 3722 3723 pn->net = net; 3724 INIT_LIST_HEAD(&pn->pktgen_threads); 3725 pn->pktgen_exiting = false; 3726 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 3727 if (!pn->proc_dir) { 3728 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 3729 return -ENODEV; 3730 } 3731 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); 3732 if (pe == NULL) { 3733 pr_err("cannot create %s procfs entry\n", PGCTRL); 3734 ret = -EINVAL; 3735 goto remove; 3736 } 3737 3738 for_each_online_cpu(cpu) { 3739 int err; 3740 3741 err = pktgen_create_thread(cpu, pn); 3742 if (err) 3743 pr_warn("Cannot create thread for cpu %d (%d)\n", 3744 cpu, err); 3745 } 3746 3747 if (list_empty(&pn->pktgen_threads)) { 3748 pr_err("Initialization failed for all threads\n"); 3749 ret = -ENODEV; 3750 goto remove_entry; 3751 } 3752 3753 return 0; 3754 3755 remove_entry: 3756 remove_proc_entry(PGCTRL, pn->proc_dir); 3757 remove: 3758 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3759 return ret; 3760 } 3761 3762 static void __net_exit pg_net_exit(struct net *net) 3763 { 3764 struct pktgen_net *pn = net_generic(net, pg_net_id); 3765 struct pktgen_thread *t; 3766 struct list_head *q, *n; 3767 LIST_HEAD(list); 3768 3769 /* Stop all interfaces & threads */ 3770 pn->pktgen_exiting = true; 3771 3772 mutex_lock(&pktgen_thread_lock); 3773 list_splice_init(&pn->pktgen_threads, &list); 3774 mutex_unlock(&pktgen_thread_lock); 3775 3776 list_for_each_safe(q, n, &list) { 3777 t = list_entry(q, struct pktgen_thread, th_list); 3778 list_del(&t->th_list); 3779 kthread_stop(t->tsk); 3780 kfree(t); 3781 } 3782 3783 remove_proc_entry(PGCTRL, pn->proc_dir); 3784 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 3785 } 3786 3787 static struct pernet_operations pg_net_ops = { 3788 .init = pg_net_init, 3789 .exit = pg_net_exit, 3790 .id = &pg_net_id, 3791 .size = sizeof(struct pktgen_net), 3792 }; 3793 3794 static int __init pg_init(void) 3795 { 3796 int ret = 0; 3797 3798 pr_info("%s", version); 3799 ret = register_pernet_subsys(&pg_net_ops); 3800 if (ret) 3801 return ret; 3802 ret = register_netdevice_notifier(&pktgen_notifier_block); 3803 if (ret) 3804 unregister_pernet_subsys(&pg_net_ops); 3805 3806 return ret; 3807 } 3808 3809 static void __exit pg_cleanup(void) 3810 { 3811 unregister_netdevice_notifier(&pktgen_notifier_block); 3812 unregister_pernet_subsys(&pg_net_ops); 3813 /* Don't need rcu_barrier() due to use of kfree_rcu() */ 3814 } 3815 3816 module_init(pg_init); 3817 module_exit(pg_cleanup); 3818 3819 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3820 MODULE_DESCRIPTION("Packet Generator tool"); 3821 MODULE_LICENSE("GPL"); 3822 MODULE_VERSION(VERSION); 3823 module_param(pg_count_d, int, 0); 3824 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3825 module_param(pg_delay_d, int, 0); 3826 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3827 module_param(pg_clone_skb_d, int, 0); 3828 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3829 module_param(debug, int, 0); 3830 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3831