1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Authors: 4 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 5 * Uppsala University and 6 * Swedish University of Agricultural Sciences 7 * 8 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 9 * Ben Greear <greearb@candelatech.com> 10 * Jens Låås <jens.laas@data.slu.se> 11 * 12 * A tool for loading the network with preconfigurated packets. 13 * The tool is implemented as a linux module. Parameters are output 14 * device, delay (to hard_xmit), number of packets, and whether 15 * to use multiple SKBs or just the same one. 16 * pktgen uses the installed interface's output routine. 17 * 18 * Additional hacking by: 19 * 20 * Jens.Laas@data.slu.se 21 * Improved by ANK. 010120. 22 * Improved by ANK even more. 010212. 23 * MAC address typo fixed. 010417 --ro 24 * Integrated. 020301 --DaveM 25 * Added multiskb option 020301 --DaveM 26 * Scaling of results. 020417--sigurdur@linpro.no 27 * Significant re-work of the module: 28 * * Convert to threaded model to more efficiently be able to transmit 29 * and receive on multiple interfaces at once. 30 * * Converted many counters to __u64 to allow longer runs. 31 * * Allow configuration of ranges, like min/max IP address, MACs, 32 * and UDP-ports, for both source and destination, and can 33 * set to use a random distribution or sequentially walk the range. 34 * * Can now change most values after starting. 35 * * Place 12-byte packet in UDP payload with magic number, 36 * sequence number, and timestamp. 37 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 38 * latencies (with micro-second) precision. 39 * * Add IOCTL interface to easily get counters & configuration. 40 * --Ben Greear <greearb@candelatech.com> 41 * 42 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 43 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 44 * as a "fastpath" with a configurable number of clones after alloc's. 45 * clone_skb=0 means all packets are allocated this also means ranges time 46 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 47 * clones. 48 * 49 * Also moved to /proc/net/pktgen/ 50 * --ro 51 * 52 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 53 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 54 * --Ben Greear <greearb@candelatech.com> 55 * 56 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 57 * 58 * 021124 Finished major redesign and rewrite for new functionality. 59 * See Documentation/networking/pktgen.rst for how to use this. 60 * 61 * The new operation: 62 * For each CPU one thread/process is created at start. This process checks 63 * for running devices in the if_list and sends packets until count is 0 it 64 * also the thread checks the thread->control which is used for inter-process 65 * communication. controlling process "posts" operations to the threads this 66 * way. 67 * The if_list is RCU protected, and the if_lock remains to protect updating 68 * of if_list, from "add_device" as it invoked from userspace (via proc write). 69 * 70 * By design there should only be *one* "controlling" process. In practice 71 * multiple write accesses gives unpredictable result. Understood by "write" 72 * to /proc gives result code that should be read be the "writer". 73 * For practical use this should be no problem. 74 * 75 * Note when adding devices to a specific CPU there good idea to also assign 76 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 77 * --ro 78 * 79 * Fix refcount off by one if first packet fails, potential null deref, 80 * memleak 030710- KJP 81 * 82 * First "ranges" functionality for ipv6 030726 --ro 83 * 84 * Included flow support. 030802 ANK. 85 * 86 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 87 * 88 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 89 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 90 * 91 * New xmit() return, do_div and misc clean up by Stephen Hemminger 92 * <shemminger@osdl.org> 040923 93 * 94 * Randy Dunlap fixed u64 printk compiler warning 95 * 96 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 97 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 98 * 99 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 100 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 101 * 102 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 103 * 050103 104 * 105 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 106 * 107 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 108 * 109 * Fixed src_mac command to set source mac of packet to value specified in 110 * command by Adit Ranadive <adit.262@gmail.com> 111 */ 112 113 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 114 115 #include <linux/sys.h> 116 #include <linux/types.h> 117 #include <linux/minmax.h> 118 #include <linux/module.h> 119 #include <linux/moduleparam.h> 120 #include <linux/kernel.h> 121 #include <linux/mutex.h> 122 #include <linux/sched.h> 123 #include <linux/slab.h> 124 #include <linux/vmalloc.h> 125 #include <linux/unistd.h> 126 #include <linux/string.h> 127 #include <linux/ptrace.h> 128 #include <linux/errno.h> 129 #include <linux/hex.h> 130 #include <linux/ioport.h> 131 #include <linux/interrupt.h> 132 #include <linux/capability.h> 133 #include <linux/hrtimer.h> 134 #include <linux/freezer.h> 135 #include <linux/delay.h> 136 #include <linux/timer.h> 137 #include <linux/list.h> 138 #include <linux/init.h> 139 #include <linux/skbuff.h> 140 #include <linux/netdevice.h> 141 #include <linux/inet.h> 142 #include <linux/inetdevice.h> 143 #include <linux/rtnetlink.h> 144 #include <linux/if_arp.h> 145 #include <linux/if_vlan.h> 146 #include <linux/in.h> 147 #include <linux/ip.h> 148 #include <linux/ipv6.h> 149 #include <linux/udp.h> 150 #include <linux/proc_fs.h> 151 #include <linux/seq_file.h> 152 #include <linux/wait.h> 153 #include <linux/etherdevice.h> 154 #include <linux/kthread.h> 155 #include <linux/prefetch.h> 156 #include <linux/mmzone.h> 157 #include <net/net_namespace.h> 158 #include <net/checksum.h> 159 #include <net/ipv6.h> 160 #include <net/udp.h> 161 #include <net/ip6_checksum.h> 162 #include <net/addrconf.h> 163 #include <net/xfrm.h> 164 #include <net/netns/generic.h> 165 #include <asm/byteorder.h> 166 #include <linux/rcupdate.h> 167 #include <linux/bitops.h> 168 #include <linux/io.h> 169 #include <linux/timex.h> 170 #include <linux/uaccess.h> 171 #include <asm/dma.h> 172 #include <asm/div64.h> /* do_div */ 173 174 #define VERSION "2.75" 175 #define IP_NAME_SZ 32 176 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 177 #define MPLS_STACK_BOTTOM htonl(0x00000100) 178 /* Max number of internet mix entries that can be specified in imix_weights. */ 179 #define MAX_IMIX_ENTRIES 20 180 #define IMIX_PRECISION 100 /* Precision of IMIX distribution */ 181 182 #define func_enter() pr_debug("entering %s\n", __func__) 183 184 #define PKT_FLAGS \ 185 pf(IPV6) /* Interface in IPV6 Mode */ \ 186 pf(IPSRC_RND) /* IP-Src Random */ \ 187 pf(IPDST_RND) /* IP-Dst Random */ \ 188 pf(TXSIZE_RND) /* Transmit size is random */ \ 189 pf(UDPSRC_RND) /* UDP-Src Random */ \ 190 pf(UDPDST_RND) /* UDP-Dst Random */ \ 191 pf(UDPCSUM) /* Include UDP checksum */ \ 192 pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \ 193 pf(MPLS_RND) /* Random MPLS labels */ \ 194 pf(QUEUE_MAP_RND) /* queue map Random */ \ 195 pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \ 196 pf(FLOW_SEQ) /* Sequential flows */ \ 197 pf(IPSEC) /* ipsec on for flows */ \ 198 pf(MACSRC_RND) /* MAC-Src Random */ \ 199 pf(MACDST_RND) /* MAC-Dst Random */ \ 200 pf(VID_RND) /* Random VLAN ID */ \ 201 pf(SVID_RND) /* Random SVLAN ID */ \ 202 pf(NODE) /* Node memory alloc*/ \ 203 pf(SHARED) /* Shared SKB */ \ 204 205 #define pf(flag) flag##_SHIFT, 206 enum pkt_flags { 207 PKT_FLAGS 208 }; 209 #undef pf 210 211 /* Device flag bits */ 212 #define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT); 213 PKT_FLAGS 214 #undef pf 215 216 #define pf(flag) __stringify(flag), 217 static char *pkt_flag_names[] = { 218 PKT_FLAGS 219 }; 220 #undef pf 221 222 #define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names) 223 224 /* Thread control flag bits */ 225 #define T_STOP (1<<0) /* Stop run */ 226 #define T_RUN (1<<1) /* Start run */ 227 #define T_REMDEVALL (1<<2) /* Remove all devs */ 228 #define T_REMDEV (1<<3) /* Remove one dev */ 229 230 /* Xmit modes */ 231 #define M_START_XMIT 0 /* Default normal TX */ 232 #define M_NETIF_RECEIVE 1 /* Inject packets into stack */ 233 #define M_QUEUE_XMIT 2 /* Inject packet into qdisc */ 234 235 /* If lock -- protects updating of if_list */ 236 #define if_lock(t) mutex_lock(&(t->if_lock)) 237 #define if_unlock(t) mutex_unlock(&(t->if_lock)) 238 239 /* Used to help with determining the pkts on receive */ 240 #define PKTGEN_MAGIC 0xbe9be955 241 #define PG_PROC_DIR "pktgen" 242 #define PGCTRL "pgctrl" 243 244 #define MAX_CFLOWS 65536 245 246 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 247 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 248 249 struct imix_pkt { 250 u64 size; 251 u64 weight; 252 u64 count_so_far; 253 }; 254 255 struct flow_state { 256 __be32 cur_daddr; 257 int count; 258 #ifdef CONFIG_XFRM 259 struct xfrm_state *x; 260 #endif 261 __u32 flags; 262 }; 263 264 /* flow flag bits */ 265 #define F_INIT (1<<0) /* flow has been initialized */ 266 267 struct pktgen_dev { 268 /* 269 * Try to keep frequent/infrequent used vars. separated. 270 */ 271 struct proc_dir_entry *entry; /* proc file */ 272 struct pktgen_thread *pg_thread;/* the owner */ 273 struct list_head list; /* chaining in the thread's run-queue */ 274 struct rcu_head rcu; /* freed by RCU */ 275 276 int running; /* if false, the test will stop */ 277 278 /* If min != max, then we will either do a linear iteration, or 279 * we will do a random selection from within the range. 280 */ 281 __u32 flags; 282 int xmit_mode; 283 int min_pkt_size; 284 int max_pkt_size; 285 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 286 int nfrags; 287 int removal_mark; /* non-zero => the device is marked for 288 * removal by worker thread 289 */ 290 291 struct page *page; 292 u64 delay; /* nano-seconds */ 293 294 __u64 count; /* Default No packets to send */ 295 __u64 sofar; /* How many pkts we've sent so far */ 296 __u64 tx_bytes; /* How many bytes we've transmitted */ 297 __u64 errors; /* Errors when trying to transmit, */ 298 299 /* runtime counters relating to clone_skb */ 300 301 __u32 clone_count; 302 int last_ok; /* Was last skb sent? 303 * Or a failed transmit of some sort? 304 * This will keep sequence numbers in order 305 */ 306 ktime_t next_tx; 307 ktime_t started_at; 308 ktime_t stopped_at; 309 u64 idle_acc; /* nano-seconds */ 310 311 __u32 seq_num; 312 313 int clone_skb; /* 314 * Use multiple SKBs during packet gen. 315 * If this number is greater than 1, then 316 * that many copies of the same packet will be 317 * sent before a new packet is allocated. 318 * If you want to send 1024 identical packets 319 * before creating a new packet, 320 * set clone_skb to 1024. 321 */ 322 323 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 324 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 325 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 326 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 327 328 struct in6_addr in6_saddr; 329 struct in6_addr in6_daddr; 330 struct in6_addr cur_in6_daddr; 331 struct in6_addr cur_in6_saddr; 332 /* For ranges */ 333 struct in6_addr min_in6_daddr; 334 struct in6_addr max_in6_daddr; 335 struct in6_addr min_in6_saddr; 336 struct in6_addr max_in6_saddr; 337 338 /* If we're doing ranges, random or incremental, then this 339 * defines the min/max for those ranges. 340 */ 341 __be32 saddr_min; /* inclusive, source IP address */ 342 __be32 saddr_max; /* exclusive, source IP address */ 343 __be32 daddr_min; /* inclusive, dest IP address */ 344 __be32 daddr_max; /* exclusive, dest IP address */ 345 346 __u16 udp_src_min; /* inclusive, source UDP port */ 347 __u16 udp_src_max; /* exclusive, source UDP port */ 348 __u16 udp_dst_min; /* inclusive, dest UDP port */ 349 __u16 udp_dst_max; /* exclusive, dest UDP port */ 350 351 /* DSCP + ECN */ 352 __u8 tos; /* six MSB of (former) IPv4 TOS 353 * are for dscp codepoint 354 */ 355 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 356 * (see RFC 3260, sec. 4) 357 */ 358 359 /* IMIX */ 360 unsigned int n_imix_entries; 361 struct imix_pkt imix_entries[MAX_IMIX_ENTRIES]; 362 /* Maps 0-IMIX_PRECISION range to imix_entry based on probability*/ 363 __u8 imix_distribution[IMIX_PRECISION]; 364 365 /* MPLS */ 366 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 367 __be32 labels[MAX_MPLS_LABELS]; 368 369 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 370 __u8 vlan_p; 371 __u8 vlan_cfi; 372 __u16 vlan_id; /* 0xffff means no vlan tag */ 373 374 __u8 svlan_p; 375 __u8 svlan_cfi; 376 __u16 svlan_id; /* 0xffff means no svlan tag */ 377 378 __u32 src_mac_count; /* How many MACs to iterate through */ 379 __u32 dst_mac_count; /* How many MACs to iterate through */ 380 381 unsigned char dst_mac[ETH_ALEN]; 382 unsigned char src_mac[ETH_ALEN]; 383 384 __u32 cur_dst_mac_offset; 385 __u32 cur_src_mac_offset; 386 __be32 cur_saddr; 387 __be32 cur_daddr; 388 __u16 ip_id; 389 __u16 cur_udp_dst; 390 __u16 cur_udp_src; 391 __u16 cur_queue_map; 392 __u32 cur_pkt_size; 393 __u32 last_pkt_size; 394 395 __u8 hh[14]; 396 /* = { 397 * 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 398 * 399 * We fill in SRC address later 400 * 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 401 * 0x08, 0x00 402 * }; 403 */ 404 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 405 406 struct sk_buff *skb; /* skb we are to transmit next, used for when we 407 * are transmitting the same one multiple times 408 */ 409 struct net_device *odev; /* The out-going device. 410 * Note that the device should have it's 411 * pg_info pointer pointing back to this 412 * device. 413 * Set when the user specifies the out-going 414 * device name (not when the inject is 415 * started as it used to do.) 416 */ 417 netdevice_tracker dev_tracker; 418 char odevname[32]; 419 struct flow_state *flows; 420 unsigned int cflows; /* Concurrent flows (config) */ 421 unsigned int lflow; /* Flow length (config) */ 422 unsigned int nflows; /* accumulated flows (stats) */ 423 unsigned int curfl; /* current sequenced flow (state)*/ 424 425 u16 queue_map_min; 426 u16 queue_map_max; 427 __u32 skb_priority; /* skb priority field */ 428 unsigned int burst; /* number of duplicated packets to burst */ 429 int node; /* Memory node */ 430 431 #ifdef CONFIG_XFRM 432 __u8 ipsmode; /* IPSEC mode (config) */ 433 __u8 ipsproto; /* IPSEC type (config) */ 434 __u32 spi; 435 struct xfrm_dst xdst; 436 struct dst_ops dstops; 437 #endif 438 char result[512]; 439 }; 440 441 struct pktgen_hdr { 442 __be32 pgh_magic; 443 __be32 seq_num; 444 __be32 tv_sec; 445 __be32 tv_usec; 446 }; 447 448 449 static unsigned int pg_net_id __read_mostly; 450 451 struct pktgen_net { 452 struct net *net; 453 struct proc_dir_entry *proc_dir; 454 struct list_head pktgen_threads; 455 bool pktgen_exiting; 456 }; 457 458 struct pktgen_thread { 459 struct mutex if_lock; /* for list of devices */ 460 struct list_head if_list; /* All device here */ 461 struct list_head th_list; 462 struct task_struct *tsk; 463 char result[512]; 464 465 /* Field for thread to receive "posted" events terminate, 466 * stop ifs etc. 467 */ 468 469 u32 control; 470 int cpu; 471 472 wait_queue_head_t queue; 473 struct completion start_done; 474 struct pktgen_net *net; 475 }; 476 477 #define REMOVE 1 478 #define FIND 0 479 480 static const char version[] = 481 "Packet Generator for packet performance testing. Version: " VERSION "\n"; 482 483 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 484 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 485 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 486 const char *ifname, bool exact); 487 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 488 static void pktgen_run_all_threads(struct pktgen_net *pn); 489 static void pktgen_reset_all_threads(struct pktgen_net *pn); 490 static void pktgen_stop_all_threads(struct pktgen_net *pn); 491 492 static void pktgen_stop(struct pktgen_thread *t); 493 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 494 static void fill_imix_distribution(struct pktgen_dev *pkt_dev); 495 496 /* Module parameters, defaults. */ 497 static int pg_count_d __read_mostly = 1000; 498 static int pg_delay_d __read_mostly; 499 static int pg_clone_skb_d __read_mostly; 500 static int debug __read_mostly; 501 502 static DEFINE_MUTEX(pktgen_thread_lock); 503 504 static struct notifier_block pktgen_notifier_block = { 505 .notifier_call = pktgen_device_event, 506 }; 507 508 /* 509 * /proc handling functions 510 * 511 */ 512 513 static int pgctrl_show(struct seq_file *seq, void *v) 514 { 515 seq_puts(seq, version); 516 return 0; 517 } 518 519 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 520 size_t count, loff_t *ppos) 521 { 522 char data[128]; 523 size_t max; 524 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); 525 526 if (!capable(CAP_NET_ADMIN)) 527 return -EPERM; 528 529 if (count < 1) 530 return -EINVAL; 531 532 max = min(count, sizeof(data) - 1); 533 if (copy_from_user(data, buf, max)) 534 return -EFAULT; 535 536 if (data[max - 1] == '\n') 537 data[max - 1] = 0; /* strip trailing '\n', terminate string */ 538 else 539 data[max] = 0; /* terminate string */ 540 541 if (!strcmp(data, "stop")) 542 pktgen_stop_all_threads(pn); 543 else if (!strcmp(data, "start")) 544 pktgen_run_all_threads(pn); 545 else if (!strcmp(data, "reset")) 546 pktgen_reset_all_threads(pn); 547 else 548 return -EINVAL; 549 550 return count; 551 } 552 553 static int pgctrl_open(struct inode *inode, struct file *file) 554 { 555 return single_open(file, pgctrl_show, pde_data(inode)); 556 } 557 558 static const struct proc_ops pktgen_proc_ops = { 559 .proc_open = pgctrl_open, 560 .proc_read = seq_read, 561 .proc_lseek = seq_lseek, 562 .proc_write = pgctrl_write, 563 .proc_release = single_release, 564 }; 565 566 static int pktgen_if_show(struct seq_file *seq, void *v) 567 { 568 const struct pktgen_dev *pkt_dev = seq->private; 569 ktime_t stopped; 570 unsigned int i; 571 u64 idle; 572 573 seq_printf(seq, 574 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 575 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 576 pkt_dev->max_pkt_size); 577 578 if (pkt_dev->n_imix_entries > 0) { 579 seq_puts(seq, " imix_weights: "); 580 for (i = 0; i < pkt_dev->n_imix_entries; i++) { 581 seq_printf(seq, "%llu,%llu ", 582 pkt_dev->imix_entries[i].size, 583 pkt_dev->imix_entries[i].weight); 584 } 585 seq_puts(seq, "\n"); 586 } 587 588 seq_printf(seq, 589 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 590 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 591 pkt_dev->clone_skb, pkt_dev->odevname); 592 593 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 594 pkt_dev->lflow); 595 596 seq_printf(seq, 597 " queue_map_min: %u queue_map_max: %u\n", 598 pkt_dev->queue_map_min, 599 pkt_dev->queue_map_max); 600 601 if (pkt_dev->skb_priority) 602 seq_printf(seq, " skb_priority: %u\n", 603 pkt_dev->skb_priority); 604 605 if (pkt_dev->flags & F_IPV6) { 606 seq_printf(seq, 607 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 608 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 609 &pkt_dev->in6_saddr, 610 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 611 &pkt_dev->in6_daddr, 612 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 613 } else { 614 seq_printf(seq, 615 " dst_min: %s dst_max: %s\n", 616 pkt_dev->dst_min, pkt_dev->dst_max); 617 seq_printf(seq, 618 " src_min: %s src_max: %s\n", 619 pkt_dev->src_min, pkt_dev->src_max); 620 } 621 622 seq_puts(seq, " src_mac: "); 623 624 seq_printf(seq, "%pM ", 625 is_zero_ether_addr(pkt_dev->src_mac) ? 626 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 627 628 seq_puts(seq, "dst_mac: "); 629 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 630 631 seq_printf(seq, 632 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", 633 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 634 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 635 636 seq_printf(seq, 637 " src_mac_count: %d dst_mac_count: %d\n", 638 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 639 640 if (pkt_dev->nr_labels) { 641 seq_puts(seq, " mpls: "); 642 for (i = 0; i < pkt_dev->nr_labels; i++) 643 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 644 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 645 } 646 647 if (pkt_dev->vlan_id != 0xffff) 648 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 649 pkt_dev->vlan_id, pkt_dev->vlan_p, 650 pkt_dev->vlan_cfi); 651 652 if (pkt_dev->svlan_id != 0xffff) 653 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 654 pkt_dev->svlan_id, pkt_dev->svlan_p, 655 pkt_dev->svlan_cfi); 656 657 if (pkt_dev->tos) 658 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 659 660 if (pkt_dev->traffic_class) 661 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 662 663 if (pkt_dev->burst > 1) 664 seq_printf(seq, " burst: %d\n", pkt_dev->burst); 665 666 if (pkt_dev->node >= 0) 667 seq_printf(seq, " node: %d\n", pkt_dev->node); 668 669 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) 670 seq_puts(seq, " xmit_mode: netif_receive\n"); 671 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) 672 seq_puts(seq, " xmit_mode: xmit_queue\n"); 673 674 seq_puts(seq, " Flags: "); 675 676 for (i = 0; i < NR_PKT_FLAGS; i++) { 677 if (i == FLOW_SEQ_SHIFT) 678 if (!pkt_dev->cflows) 679 continue; 680 681 if (pkt_dev->flags & (1 << i)) { 682 seq_printf(seq, "%s ", pkt_flag_names[i]); 683 #ifdef CONFIG_XFRM 684 if (i == IPSEC_SHIFT && pkt_dev->spi) 685 seq_printf(seq, "spi:%u ", pkt_dev->spi); 686 #endif 687 } else if (i == FLOW_SEQ_SHIFT) { 688 seq_puts(seq, "FLOW_RND "); 689 } 690 } 691 692 seq_puts(seq, "\n"); 693 694 /* not really stopped, more like last-running-at */ 695 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; 696 idle = pkt_dev->idle_acc; 697 do_div(idle, NSEC_PER_USEC); 698 699 seq_printf(seq, 700 "Current:\n pkts-sofar: %llu errors: %llu\n", 701 (unsigned long long)pkt_dev->sofar, 702 (unsigned long long)pkt_dev->errors); 703 704 if (pkt_dev->n_imix_entries > 0) { 705 int i; 706 707 seq_puts(seq, " imix_size_counts: "); 708 for (i = 0; i < pkt_dev->n_imix_entries; i++) { 709 seq_printf(seq, "%llu,%llu ", 710 pkt_dev->imix_entries[i].size, 711 pkt_dev->imix_entries[i].count_so_far); 712 } 713 seq_puts(seq, "\n"); 714 } 715 716 seq_printf(seq, 717 " started: %lluus stopped: %lluus idle: %lluus\n", 718 (unsigned long long) ktime_to_us(pkt_dev->started_at), 719 (unsigned long long) ktime_to_us(stopped), 720 (unsigned long long) idle); 721 722 seq_printf(seq, 723 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 724 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 725 pkt_dev->cur_src_mac_offset); 726 727 if (pkt_dev->flags & F_IPV6) { 728 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 729 &pkt_dev->cur_in6_saddr, 730 &pkt_dev->cur_in6_daddr); 731 } else 732 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 733 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 734 735 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 736 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 737 738 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 739 740 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 741 742 if (pkt_dev->result[0]) 743 seq_printf(seq, "Result: %s\n", pkt_dev->result); 744 else 745 seq_puts(seq, "Result: Idle\n"); 746 747 return 0; 748 } 749 750 751 static ssize_t hex32_arg(const char __user *user_buffer, size_t maxlen, 752 __u32 *num) 753 { 754 size_t i = 0; 755 756 *num = 0; 757 758 for (; i < maxlen; i++) { 759 int value; 760 char c; 761 762 if (get_user(c, &user_buffer[i])) 763 return -EFAULT; 764 value = hex_to_bin(c); 765 if (value >= 0) { 766 *num <<= 4; 767 *num |= value; 768 } else { 769 break; 770 } 771 } 772 return i; 773 } 774 775 static ssize_t count_trail_chars(const char __user *user_buffer, size_t maxlen) 776 { 777 size_t i; 778 779 for (i = 0; i < maxlen; i++) { 780 char c; 781 782 if (get_user(c, &user_buffer[i])) 783 return -EFAULT; 784 switch (c) { 785 case '\"': 786 case '\n': 787 case '\r': 788 case '\t': 789 case ' ': 790 case '=': 791 break; 792 default: 793 goto done; 794 } 795 } 796 done: 797 return i; 798 } 799 800 static ssize_t num_arg(const char __user *user_buffer, size_t maxlen, 801 unsigned long *num) 802 { 803 size_t i; 804 *num = 0; 805 806 for (i = 0; i < maxlen; i++) { 807 char c; 808 809 if (get_user(c, &user_buffer[i])) 810 return -EFAULT; 811 if ((c >= '0') && (c <= '9')) { 812 *num *= 10; 813 *num += c - '0'; 814 } else 815 break; 816 } 817 return i; 818 } 819 820 static ssize_t strn_len(const char __user *user_buffer, size_t maxlen) 821 { 822 size_t i; 823 824 for (i = 0; i < maxlen; i++) { 825 char c; 826 827 if (get_user(c, &user_buffer[i])) 828 return -EFAULT; 829 switch (c) { 830 case '\"': 831 case '\n': 832 case '\r': 833 case '\t': 834 case ' ': 835 case '=': 836 goto done_str; 837 default: 838 break; 839 } 840 } 841 done_str: 842 return i; 843 } 844 845 /* Parses imix entries from user buffer. 846 * The user buffer should consist of imix entries separated by spaces 847 * where each entry consists of size and weight delimited by commas. 848 * "size1,weight_1 size2,weight_2 ... size_n,weight_n" for example. 849 */ 850 static ssize_t get_imix_entries(const char __user *buffer, 851 size_t maxlen, 852 struct pktgen_dev *pkt_dev) 853 { 854 size_t i = 0, max; 855 ssize_t len; 856 char c; 857 858 pkt_dev->n_imix_entries = 0; 859 860 do { 861 unsigned long weight; 862 unsigned long size; 863 864 if (pkt_dev->n_imix_entries >= MAX_IMIX_ENTRIES) 865 return -E2BIG; 866 867 if (i >= maxlen) 868 return -EINVAL; 869 870 max = min(10, maxlen - i); 871 len = num_arg(&buffer[i], max, &size); 872 if (len < 0) 873 return len; 874 i += len; 875 if (i >= maxlen) 876 return -EINVAL; 877 if (get_user(c, &buffer[i])) 878 return -EFAULT; 879 /* Check for comma between size_i and weight_i */ 880 if (c != ',') 881 return -EINVAL; 882 i++; 883 if (i >= maxlen) 884 return -EINVAL; 885 886 if (size < 14 + 20 + 8) 887 size = 14 + 20 + 8; 888 889 max = min(10, maxlen - i); 890 len = num_arg(&buffer[i], max, &weight); 891 if (len < 0) 892 return len; 893 if (weight <= 0) 894 return -EINVAL; 895 896 pkt_dev->imix_entries[pkt_dev->n_imix_entries].size = size; 897 pkt_dev->imix_entries[pkt_dev->n_imix_entries].weight = weight; 898 899 i += len; 900 pkt_dev->n_imix_entries++; 901 902 if (i >= maxlen) 903 break; 904 if (get_user(c, &buffer[i])) 905 return -EFAULT; 906 i++; 907 } while (c == ' '); 908 909 return i; 910 } 911 912 static ssize_t get_labels(const char __user *buffer, 913 size_t maxlen, struct pktgen_dev *pkt_dev) 914 { 915 unsigned int n = 0; 916 size_t i = 0, max; 917 ssize_t len; 918 char c; 919 920 pkt_dev->nr_labels = 0; 921 do { 922 __u32 tmp; 923 924 if (n >= MAX_MPLS_LABELS) 925 return -E2BIG; 926 927 if (i >= maxlen) 928 return -EINVAL; 929 930 max = min(8, maxlen - i); 931 len = hex32_arg(&buffer[i], max, &tmp); 932 if (len < 0) 933 return len; 934 935 /* return empty list in case of invalid input or zero value */ 936 if (len == 0 || tmp == 0) 937 return maxlen; 938 939 pkt_dev->labels[n] = htonl(tmp); 940 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 941 pkt_dev->flags |= F_MPLS_RND; 942 i += len; 943 n++; 944 if (i >= maxlen) 945 break; 946 if (get_user(c, &buffer[i])) 947 return -EFAULT; 948 i++; 949 } while (c == ','); 950 951 pkt_dev->nr_labels = n; 952 return i; 953 } 954 955 static __u32 pktgen_read_flag(const char *f, bool *disable) 956 { 957 __u32 i; 958 959 if (f[0] == '!') { 960 *disable = true; 961 f++; 962 } 963 964 for (i = 0; i < NR_PKT_FLAGS; i++) { 965 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT) 966 continue; 967 968 /* allow only disabling ipv6 flag */ 969 if (!*disable && i == IPV6_SHIFT) 970 continue; 971 972 if (strcmp(f, pkt_flag_names[i]) == 0) 973 return 1 << i; 974 } 975 976 if (strcmp(f, "FLOW_RND") == 0) { 977 *disable = !*disable; 978 return F_FLOW_SEQ; 979 } 980 981 return 0; 982 } 983 984 static ssize_t pktgen_if_write(struct file *file, 985 const char __user *user_buffer, size_t count, 986 loff_t *offset) 987 { 988 struct seq_file *seq = file->private_data; 989 struct pktgen_dev *pkt_dev = seq->private; 990 size_t i, max; 991 ssize_t len; 992 char name[16], valstr[32]; 993 unsigned long value = 0; 994 char *pg_result = NULL; 995 char buf[128]; 996 997 pg_result = &(pkt_dev->result[0]); 998 999 if (count < 1) { 1000 pr_warn("wrong command format\n"); 1001 return -EINVAL; 1002 } 1003 1004 max = count; 1005 len = count_trail_chars(user_buffer, max); 1006 if (len < 0) { 1007 pr_warn("illegal format\n"); 1008 return len; 1009 } 1010 i = len; 1011 1012 /* Read variable name */ 1013 max = min(sizeof(name) - 1, count - i); 1014 len = strn_len(&user_buffer[i], max); 1015 if (len < 0) 1016 return len; 1017 1018 memset(name, 0, sizeof(name)); 1019 if (copy_from_user(name, &user_buffer[i], len)) 1020 return -EFAULT; 1021 i += len; 1022 1023 max = count - i; 1024 len = count_trail_chars(&user_buffer[i], max); 1025 if (len < 0) 1026 return len; 1027 1028 i += len; 1029 1030 if (debug) { 1031 size_t copy = min_t(size_t, count + 1, 1024); 1032 char *tp = strndup_user(user_buffer, copy); 1033 1034 if (IS_ERR(tp)) 1035 return PTR_ERR(tp); 1036 1037 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp); 1038 kfree(tp); 1039 } 1040 1041 if (!strcmp(name, "min_pkt_size")) { 1042 max = min(10, count - i); 1043 len = num_arg(&user_buffer[i], max, &value); 1044 if (len < 0) 1045 return len; 1046 1047 if (value < 14 + 20 + 8) 1048 value = 14 + 20 + 8; 1049 if (value != pkt_dev->min_pkt_size) { 1050 pkt_dev->min_pkt_size = value; 1051 pkt_dev->cur_pkt_size = value; 1052 } 1053 sprintf(pg_result, "OK: min_pkt_size=%d", 1054 pkt_dev->min_pkt_size); 1055 return count; 1056 } 1057 1058 if (!strcmp(name, "max_pkt_size")) { 1059 max = min(10, count - i); 1060 len = num_arg(&user_buffer[i], max, &value); 1061 if (len < 0) 1062 return len; 1063 1064 if (value < 14 + 20 + 8) 1065 value = 14 + 20 + 8; 1066 if (value != pkt_dev->max_pkt_size) { 1067 pkt_dev->max_pkt_size = value; 1068 pkt_dev->cur_pkt_size = value; 1069 } 1070 sprintf(pg_result, "OK: max_pkt_size=%d", 1071 pkt_dev->max_pkt_size); 1072 return count; 1073 } 1074 1075 /* Shortcut for min = max */ 1076 1077 if (!strcmp(name, "pkt_size")) { 1078 max = min(10, count - i); 1079 len = num_arg(&user_buffer[i], max, &value); 1080 if (len < 0) 1081 return len; 1082 1083 if (value < 14 + 20 + 8) 1084 value = 14 + 20 + 8; 1085 if (value != pkt_dev->min_pkt_size) { 1086 pkt_dev->min_pkt_size = value; 1087 pkt_dev->max_pkt_size = value; 1088 pkt_dev->cur_pkt_size = value; 1089 } 1090 sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size); 1091 return count; 1092 } 1093 1094 if (!strcmp(name, "imix_weights")) { 1095 if (pkt_dev->clone_skb > 0) 1096 return -EINVAL; 1097 1098 max = count - i; 1099 len = get_imix_entries(&user_buffer[i], max, pkt_dev); 1100 if (len < 0) 1101 return len; 1102 1103 fill_imix_distribution(pkt_dev); 1104 1105 return count; 1106 } 1107 1108 if (!strcmp(name, "debug")) { 1109 max = min(10, count - i); 1110 len = num_arg(&user_buffer[i], max, &value); 1111 if (len < 0) 1112 return len; 1113 1114 debug = value; 1115 sprintf(pg_result, "OK: debug=%u", debug); 1116 return count; 1117 } 1118 1119 if (!strcmp(name, "frags")) { 1120 max = min(10, count - i); 1121 len = num_arg(&user_buffer[i], max, &value); 1122 if (len < 0) 1123 return len; 1124 1125 pkt_dev->nfrags = value; 1126 sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags); 1127 return count; 1128 } 1129 if (!strcmp(name, "delay")) { 1130 max = min(10, count - i); 1131 len = num_arg(&user_buffer[i], max, &value); 1132 if (len < 0) 1133 return len; 1134 1135 if (value == 0x7FFFFFFF) 1136 pkt_dev->delay = ULLONG_MAX; 1137 else 1138 pkt_dev->delay = (u64)value; 1139 1140 sprintf(pg_result, "OK: delay=%llu", 1141 (unsigned long long) pkt_dev->delay); 1142 return count; 1143 } 1144 if (!strcmp(name, "rate")) { 1145 max = min(10, count - i); 1146 len = num_arg(&user_buffer[i], max, &value); 1147 if (len < 0) 1148 return len; 1149 1150 if (!value) 1151 return -EINVAL; 1152 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 1153 if (debug) 1154 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1155 1156 sprintf(pg_result, "OK: rate=%lu", value); 1157 return count; 1158 } 1159 if (!strcmp(name, "ratep")) { 1160 max = min(10, count - i); 1161 len = num_arg(&user_buffer[i], max, &value); 1162 if (len < 0) 1163 return len; 1164 1165 if (!value) 1166 return -EINVAL; 1167 pkt_dev->delay = NSEC_PER_SEC/value; 1168 if (debug) 1169 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1170 1171 sprintf(pg_result, "OK: rate=%lu", value); 1172 return count; 1173 } 1174 if (!strcmp(name, "udp_src_min")) { 1175 max = min(10, count - i); 1176 len = num_arg(&user_buffer[i], max, &value); 1177 if (len < 0) 1178 return len; 1179 1180 if (value != pkt_dev->udp_src_min) { 1181 pkt_dev->udp_src_min = value; 1182 pkt_dev->cur_udp_src = value; 1183 } 1184 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1185 return count; 1186 } 1187 if (!strcmp(name, "udp_dst_min")) { 1188 max = min(10, count - i); 1189 len = num_arg(&user_buffer[i], max, &value); 1190 if (len < 0) 1191 return len; 1192 1193 if (value != pkt_dev->udp_dst_min) { 1194 pkt_dev->udp_dst_min = value; 1195 pkt_dev->cur_udp_dst = value; 1196 } 1197 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1198 return count; 1199 } 1200 if (!strcmp(name, "udp_src_max")) { 1201 max = min(10, count - i); 1202 len = num_arg(&user_buffer[i], max, &value); 1203 if (len < 0) 1204 return len; 1205 1206 if (value != pkt_dev->udp_src_max) { 1207 pkt_dev->udp_src_max = value; 1208 pkt_dev->cur_udp_src = value; 1209 } 1210 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1211 return count; 1212 } 1213 if (!strcmp(name, "udp_dst_max")) { 1214 max = min(10, count - i); 1215 len = num_arg(&user_buffer[i], max, &value); 1216 if (len < 0) 1217 return len; 1218 1219 if (value != pkt_dev->udp_dst_max) { 1220 pkt_dev->udp_dst_max = value; 1221 pkt_dev->cur_udp_dst = value; 1222 } 1223 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1224 return count; 1225 } 1226 if (!strcmp(name, "clone_skb")) { 1227 max = min(10, count - i); 1228 len = num_arg(&user_buffer[i], max, &value); 1229 if (len < 0) 1230 return len; 1231 /* clone_skb is not supported for netif_receive xmit_mode and 1232 * IMIX mode. 1233 */ 1234 if ((value > 0) && 1235 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) || 1236 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1237 return -EOPNOTSUPP; 1238 if (value > 0 && (pkt_dev->n_imix_entries > 0 || 1239 !(pkt_dev->flags & F_SHARED))) 1240 return -EINVAL; 1241 1242 pkt_dev->clone_skb = value; 1243 1244 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1245 return count; 1246 } 1247 if (!strcmp(name, "count")) { 1248 max = min(10, count - i); 1249 len = num_arg(&user_buffer[i], max, &value); 1250 if (len < 0) 1251 return len; 1252 1253 pkt_dev->count = value; 1254 sprintf(pg_result, "OK: count=%llu", 1255 (unsigned long long)pkt_dev->count); 1256 return count; 1257 } 1258 if (!strcmp(name, "src_mac_count")) { 1259 max = min(10, count - i); 1260 len = num_arg(&user_buffer[i], max, &value); 1261 if (len < 0) 1262 return len; 1263 1264 if (pkt_dev->src_mac_count != value) { 1265 pkt_dev->src_mac_count = value; 1266 pkt_dev->cur_src_mac_offset = 0; 1267 } 1268 sprintf(pg_result, "OK: src_mac_count=%d", 1269 pkt_dev->src_mac_count); 1270 return count; 1271 } 1272 if (!strcmp(name, "dst_mac_count")) { 1273 max = min(10, count - i); 1274 len = num_arg(&user_buffer[i], max, &value); 1275 if (len < 0) 1276 return len; 1277 1278 if (pkt_dev->dst_mac_count != value) { 1279 pkt_dev->dst_mac_count = value; 1280 pkt_dev->cur_dst_mac_offset = 0; 1281 } 1282 sprintf(pg_result, "OK: dst_mac_count=%d", 1283 pkt_dev->dst_mac_count); 1284 return count; 1285 } 1286 if (!strcmp(name, "burst")) { 1287 max = min(10, count - i); 1288 len = num_arg(&user_buffer[i], max, &value); 1289 if (len < 0) 1290 return len; 1291 1292 if ((value > 1) && 1293 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) || 1294 ((pkt_dev->xmit_mode == M_START_XMIT) && 1295 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))))) 1296 return -EOPNOTSUPP; 1297 1298 if (value > 1 && !(pkt_dev->flags & F_SHARED)) 1299 return -EINVAL; 1300 1301 pkt_dev->burst = value < 1 ? 1 : value; 1302 sprintf(pg_result, "OK: burst=%u", pkt_dev->burst); 1303 return count; 1304 } 1305 if (!strcmp(name, "node")) { 1306 max = min(10, count - i); 1307 len = num_arg(&user_buffer[i], max, &value); 1308 if (len < 0) 1309 return len; 1310 1311 if (node_possible(value)) { 1312 pkt_dev->node = value; 1313 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1314 if (pkt_dev->page) { 1315 put_page(pkt_dev->page); 1316 pkt_dev->page = NULL; 1317 } 1318 } else { 1319 sprintf(pg_result, "ERROR: node not possible"); 1320 } 1321 return count; 1322 } 1323 if (!strcmp(name, "xmit_mode")) { 1324 char f[32]; 1325 1326 max = min(sizeof(f) - 1, count - i); 1327 len = strn_len(&user_buffer[i], max); 1328 if (len < 0) 1329 return len; 1330 1331 memset(f, 0, sizeof(f)); 1332 if (copy_from_user(f, &user_buffer[i], len)) 1333 return -EFAULT; 1334 1335 if (strcmp(f, "start_xmit") == 0) { 1336 pkt_dev->xmit_mode = M_START_XMIT; 1337 } else if (strcmp(f, "netif_receive") == 0) { 1338 /* clone_skb set earlier, not supported in this mode */ 1339 if (pkt_dev->clone_skb > 0) 1340 return -EOPNOTSUPP; 1341 1342 pkt_dev->xmit_mode = M_NETIF_RECEIVE; 1343 1344 /* make sure new packet is allocated every time 1345 * pktgen_xmit() is called 1346 */ 1347 pkt_dev->last_ok = 1; 1348 } else if (strcmp(f, "queue_xmit") == 0) { 1349 pkt_dev->xmit_mode = M_QUEUE_XMIT; 1350 pkt_dev->last_ok = 1; 1351 } else { 1352 sprintf(pg_result, 1353 "xmit_mode -:%s:- unknown\nAvailable modes: %s", 1354 f, "start_xmit, netif_receive\n"); 1355 return count; 1356 } 1357 sprintf(pg_result, "OK: xmit_mode=%s", f); 1358 return count; 1359 } 1360 if (!strcmp(name, "flag")) { 1361 bool disable = false; 1362 __u32 flag; 1363 char f[32]; 1364 char *end; 1365 1366 max = min(sizeof(f) - 1, count - i); 1367 len = strn_len(&user_buffer[i], max); 1368 if (len < 0) 1369 return len; 1370 1371 memset(f, 0, 32); 1372 if (copy_from_user(f, &user_buffer[i], len)) 1373 return -EFAULT; 1374 1375 flag = pktgen_read_flag(f, &disable); 1376 if (flag) { 1377 if (disable) { 1378 /* If "clone_skb", or "burst" parameters are 1379 * configured, it means that the skb still 1380 * needs to be referenced by the pktgen, so 1381 * the skb must be shared. 1382 */ 1383 if (flag == F_SHARED && (pkt_dev->clone_skb || 1384 pkt_dev->burst > 1)) 1385 return -EINVAL; 1386 pkt_dev->flags &= ~flag; 1387 } else { 1388 pkt_dev->flags |= flag; 1389 } 1390 1391 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1392 return count; 1393 } 1394 1395 /* Unknown flag */ 1396 end = pkt_dev->result + sizeof(pkt_dev->result); 1397 pg_result += sprintf(pg_result, 1398 "Flag -:%s:- unknown\n" 1399 "Available flags, (prepend ! to un-set flag):\n", f); 1400 1401 for (int n = 0; n < NR_PKT_FLAGS && pg_result < end; n++) { 1402 if (!IS_ENABLED(CONFIG_XFRM) && n == IPSEC_SHIFT) 1403 continue; 1404 pg_result += snprintf(pg_result, end - pg_result, 1405 "%s, ", pkt_flag_names[n]); 1406 } 1407 if (!WARN_ON_ONCE(pg_result >= end)) { 1408 /* Remove the comma and whitespace at the end */ 1409 *(pg_result - 2) = '\0'; 1410 } 1411 1412 return count; 1413 } 1414 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1415 max = min(sizeof(pkt_dev->dst_min) - 1, count - i); 1416 len = strn_len(&user_buffer[i], max); 1417 if (len < 0) 1418 return len; 1419 1420 if (copy_from_user(buf, &user_buffer[i], len)) 1421 return -EFAULT; 1422 buf[len] = 0; 1423 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1424 strscpy_pad(pkt_dev->dst_min, buf); 1425 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1426 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1427 } 1428 if (debug) 1429 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1430 1431 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1432 return count; 1433 } 1434 if (!strcmp(name, "dst_max")) { 1435 max = min(sizeof(pkt_dev->dst_max) - 1, count - i); 1436 len = strn_len(&user_buffer[i], max); 1437 if (len < 0) 1438 return len; 1439 1440 if (copy_from_user(buf, &user_buffer[i], len)) 1441 return -EFAULT; 1442 buf[len] = 0; 1443 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1444 strscpy_pad(pkt_dev->dst_max, buf); 1445 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1446 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1447 } 1448 if (debug) 1449 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1450 1451 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1452 return count; 1453 } 1454 if (!strcmp(name, "dst6")) { 1455 max = min(sizeof(buf) - 1, count - i); 1456 len = strn_len(&user_buffer[i], max); 1457 if (len < 0) 1458 return len; 1459 1460 pkt_dev->flags |= F_IPV6; 1461 1462 if (copy_from_user(buf, &user_buffer[i], len)) 1463 return -EFAULT; 1464 buf[len] = 0; 1465 1466 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1467 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1468 1469 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1470 1471 if (debug) 1472 pr_debug("dst6 set to: %s\n", buf); 1473 1474 sprintf(pg_result, "OK: dst6=%s", buf); 1475 return count; 1476 } 1477 if (!strcmp(name, "dst6_min")) { 1478 max = min(sizeof(buf) - 1, count - i); 1479 len = strn_len(&user_buffer[i], max); 1480 if (len < 0) 1481 return len; 1482 1483 pkt_dev->flags |= F_IPV6; 1484 1485 if (copy_from_user(buf, &user_buffer[i], len)) 1486 return -EFAULT; 1487 buf[len] = 0; 1488 1489 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1490 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1491 1492 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1493 if (debug) 1494 pr_debug("dst6_min set to: %s\n", buf); 1495 1496 sprintf(pg_result, "OK: dst6_min=%s", buf); 1497 return count; 1498 } 1499 if (!strcmp(name, "dst6_max")) { 1500 max = min(sizeof(buf) - 1, count - i); 1501 len = strn_len(&user_buffer[i], max); 1502 if (len < 0) 1503 return len; 1504 1505 pkt_dev->flags |= F_IPV6; 1506 1507 if (copy_from_user(buf, &user_buffer[i], len)) 1508 return -EFAULT; 1509 buf[len] = 0; 1510 1511 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1512 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1513 1514 if (debug) 1515 pr_debug("dst6_max set to: %s\n", buf); 1516 1517 sprintf(pg_result, "OK: dst6_max=%s", buf); 1518 return count; 1519 } 1520 if (!strcmp(name, "src6")) { 1521 max = min(sizeof(buf) - 1, count - i); 1522 len = strn_len(&user_buffer[i], max); 1523 if (len < 0) 1524 return len; 1525 1526 pkt_dev->flags |= F_IPV6; 1527 1528 if (copy_from_user(buf, &user_buffer[i], len)) 1529 return -EFAULT; 1530 buf[len] = 0; 1531 1532 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1533 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1534 1535 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1536 1537 if (debug) 1538 pr_debug("src6 set to: %s\n", buf); 1539 1540 sprintf(pg_result, "OK: src6=%s", buf); 1541 return count; 1542 } 1543 if (!strcmp(name, "src_min")) { 1544 max = min(sizeof(pkt_dev->src_min) - 1, count - i); 1545 len = strn_len(&user_buffer[i], max); 1546 if (len < 0) 1547 return len; 1548 1549 if (copy_from_user(buf, &user_buffer[i], len)) 1550 return -EFAULT; 1551 buf[len] = 0; 1552 if (strcmp(buf, pkt_dev->src_min) != 0) { 1553 strscpy_pad(pkt_dev->src_min, buf); 1554 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1555 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1556 } 1557 if (debug) 1558 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1559 1560 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1561 return count; 1562 } 1563 if (!strcmp(name, "src_max")) { 1564 max = min(sizeof(pkt_dev->src_max) - 1, count - i); 1565 len = strn_len(&user_buffer[i], max); 1566 if (len < 0) 1567 return len; 1568 1569 if (copy_from_user(buf, &user_buffer[i], len)) 1570 return -EFAULT; 1571 buf[len] = 0; 1572 if (strcmp(buf, pkt_dev->src_max) != 0) { 1573 strscpy_pad(pkt_dev->src_max, buf); 1574 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1575 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1576 } 1577 if (debug) 1578 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1579 1580 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1581 return count; 1582 } 1583 if (!strcmp(name, "dst_mac")) { 1584 max = min(sizeof(valstr) - 1, count - i); 1585 len = strn_len(&user_buffer[i], max); 1586 if (len < 0) 1587 return len; 1588 1589 memset(valstr, 0, sizeof(valstr)); 1590 if (copy_from_user(valstr, &user_buffer[i], len)) 1591 return -EFAULT; 1592 1593 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1594 return -EINVAL; 1595 /* Set up Dest MAC */ 1596 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); 1597 1598 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1599 return count; 1600 } 1601 if (!strcmp(name, "src_mac")) { 1602 max = min(sizeof(valstr) - 1, count - i); 1603 len = strn_len(&user_buffer[i], max); 1604 if (len < 0) 1605 return len; 1606 1607 memset(valstr, 0, sizeof(valstr)); 1608 if (copy_from_user(valstr, &user_buffer[i], len)) 1609 return -EFAULT; 1610 1611 if (!mac_pton(valstr, pkt_dev->src_mac)) 1612 return -EINVAL; 1613 /* Set up Src MAC */ 1614 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); 1615 1616 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1617 return count; 1618 } 1619 1620 if (!strcmp(name, "clear_counters")) { 1621 pktgen_clear_counters(pkt_dev); 1622 sprintf(pg_result, "OK: Clearing counters.\n"); 1623 return count; 1624 } 1625 1626 if (!strcmp(name, "flows")) { 1627 max = min(10, count - i); 1628 len = num_arg(&user_buffer[i], max, &value); 1629 if (len < 0) 1630 return len; 1631 1632 if (value > MAX_CFLOWS) 1633 value = MAX_CFLOWS; 1634 1635 pkt_dev->cflows = value; 1636 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1637 return count; 1638 } 1639 #ifdef CONFIG_XFRM 1640 if (!strcmp(name, "spi")) { 1641 max = min(10, count - i); 1642 len = num_arg(&user_buffer[i], max, &value); 1643 if (len < 0) 1644 return len; 1645 1646 pkt_dev->spi = value; 1647 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); 1648 return count; 1649 } 1650 #endif 1651 if (!strcmp(name, "flowlen")) { 1652 max = min(10, count - i); 1653 len = num_arg(&user_buffer[i], max, &value); 1654 if (len < 0) 1655 return len; 1656 1657 pkt_dev->lflow = value; 1658 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1659 return count; 1660 } 1661 1662 if (!strcmp(name, "queue_map_min")) { 1663 max = min(5, count - i); 1664 len = num_arg(&user_buffer[i], max, &value); 1665 if (len < 0) 1666 return len; 1667 1668 pkt_dev->queue_map_min = value; 1669 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1670 return count; 1671 } 1672 1673 if (!strcmp(name, "queue_map_max")) { 1674 max = min(5, count - i); 1675 len = num_arg(&user_buffer[i], max, &value); 1676 if (len < 0) 1677 return len; 1678 1679 pkt_dev->queue_map_max = value; 1680 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1681 return count; 1682 } 1683 1684 if (!strcmp(name, "mpls")) { 1685 unsigned int n, cnt; 1686 1687 max = count - i; 1688 len = get_labels(&user_buffer[i], max, pkt_dev); 1689 if (len < 0) 1690 return len; 1691 1692 cnt = sprintf(pg_result, "OK: mpls="); 1693 for (n = 0; n < pkt_dev->nr_labels; n++) 1694 cnt += sprintf(pg_result + cnt, 1695 "%08x%s", ntohl(pkt_dev->labels[n]), 1696 n == pkt_dev->nr_labels-1 ? "" : ","); 1697 1698 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1699 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1700 pkt_dev->svlan_id = 0xffff; 1701 1702 if (debug) 1703 pr_debug("VLAN/SVLAN auto turned off\n"); 1704 } 1705 return count; 1706 } 1707 1708 if (!strcmp(name, "vlan_id")) { 1709 max = min(4, count - i); 1710 len = num_arg(&user_buffer[i], max, &value); 1711 if (len < 0) 1712 return len; 1713 1714 if (value <= 4095) { 1715 pkt_dev->vlan_id = value; /* turn on VLAN */ 1716 1717 if (debug) 1718 pr_debug("VLAN turned on\n"); 1719 1720 if (debug && pkt_dev->nr_labels) 1721 pr_debug("MPLS auto turned off\n"); 1722 1723 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1724 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1725 } else { 1726 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1727 pkt_dev->svlan_id = 0xffff; 1728 1729 if (debug) 1730 pr_debug("VLAN/SVLAN turned off\n"); 1731 } 1732 return count; 1733 } 1734 1735 if (!strcmp(name, "vlan_p")) { 1736 max = min(1, count - i); 1737 len = num_arg(&user_buffer[i], max, &value); 1738 if (len < 0) 1739 return len; 1740 1741 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1742 pkt_dev->vlan_p = value; 1743 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1744 } else { 1745 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1746 } 1747 return count; 1748 } 1749 1750 if (!strcmp(name, "vlan_cfi")) { 1751 max = min(1, count - i); 1752 len = num_arg(&user_buffer[i], max, &value); 1753 if (len < 0) 1754 return len; 1755 1756 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1757 pkt_dev->vlan_cfi = value; 1758 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1759 } else { 1760 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1761 } 1762 return count; 1763 } 1764 1765 if (!strcmp(name, "svlan_id")) { 1766 max = min(4, count - i); 1767 len = num_arg(&user_buffer[i], max, &value); 1768 if (len < 0) 1769 return len; 1770 1771 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1772 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1773 1774 if (debug) 1775 pr_debug("SVLAN turned on\n"); 1776 1777 if (debug && pkt_dev->nr_labels) 1778 pr_debug("MPLS auto turned off\n"); 1779 1780 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1781 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1782 } else { 1783 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1784 pkt_dev->svlan_id = 0xffff; 1785 1786 if (debug) 1787 pr_debug("VLAN/SVLAN turned off\n"); 1788 } 1789 return count; 1790 } 1791 1792 if (!strcmp(name, "svlan_p")) { 1793 max = min(1, count - i); 1794 len = num_arg(&user_buffer[i], max, &value); 1795 if (len < 0) 1796 return len; 1797 1798 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1799 pkt_dev->svlan_p = value; 1800 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1801 } else { 1802 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1803 } 1804 return count; 1805 } 1806 1807 if (!strcmp(name, "svlan_cfi")) { 1808 max = min(1, count - i); 1809 len = num_arg(&user_buffer[i], max, &value); 1810 if (len < 0) 1811 return len; 1812 1813 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1814 pkt_dev->svlan_cfi = value; 1815 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1816 } else { 1817 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1818 } 1819 return count; 1820 } 1821 1822 if (!strcmp(name, "tos")) { 1823 __u32 tmp_value; 1824 1825 max = min(2, count - i); 1826 len = hex32_arg(&user_buffer[i], max, &tmp_value); 1827 if (len < 0) 1828 return len; 1829 1830 if (len == 2) { 1831 pkt_dev->tos = tmp_value; 1832 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1833 } else { 1834 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1835 } 1836 return count; 1837 } 1838 1839 if (!strcmp(name, "traffic_class")) { 1840 __u32 tmp_value; 1841 1842 max = min(2, count - i); 1843 len = hex32_arg(&user_buffer[i], max, &tmp_value); 1844 if (len < 0) 1845 return len; 1846 1847 if (len == 2) { 1848 pkt_dev->traffic_class = tmp_value; 1849 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1850 } else { 1851 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1852 } 1853 return count; 1854 } 1855 1856 if (!strcmp(name, "skb_priority")) { 1857 max = min(9, count - i); 1858 len = num_arg(&user_buffer[i], max, &value); 1859 if (len < 0) 1860 return len; 1861 1862 pkt_dev->skb_priority = value; 1863 sprintf(pg_result, "OK: skb_priority=%i", 1864 pkt_dev->skb_priority); 1865 return count; 1866 } 1867 1868 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1869 return -EINVAL; 1870 } 1871 1872 static int pktgen_if_open(struct inode *inode, struct file *file) 1873 { 1874 return single_open(file, pktgen_if_show, pde_data(inode)); 1875 } 1876 1877 static const struct proc_ops pktgen_if_proc_ops = { 1878 .proc_open = pktgen_if_open, 1879 .proc_read = seq_read, 1880 .proc_lseek = seq_lseek, 1881 .proc_write = pktgen_if_write, 1882 .proc_release = single_release, 1883 }; 1884 1885 static int pktgen_thread_show(struct seq_file *seq, void *v) 1886 { 1887 struct pktgen_thread *t = seq->private; 1888 const struct pktgen_dev *pkt_dev; 1889 1890 BUG_ON(!t); 1891 1892 seq_puts(seq, "Running: "); 1893 1894 rcu_read_lock(); 1895 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1896 if (pkt_dev->running) 1897 seq_printf(seq, "%s ", pkt_dev->odevname); 1898 1899 seq_puts(seq, "\nStopped: "); 1900 1901 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 1902 if (!pkt_dev->running) 1903 seq_printf(seq, "%s ", pkt_dev->odevname); 1904 1905 if (t->result[0]) 1906 seq_printf(seq, "\nResult: %s\n", t->result); 1907 else 1908 seq_puts(seq, "\nResult: NA\n"); 1909 1910 rcu_read_unlock(); 1911 1912 return 0; 1913 } 1914 1915 static ssize_t pktgen_thread_write(struct file *file, 1916 const char __user *user_buffer, 1917 size_t count, loff_t *offset) 1918 { 1919 struct seq_file *seq = file->private_data; 1920 struct pktgen_thread *t = seq->private; 1921 size_t i, max; 1922 ssize_t len, ret; 1923 char name[40]; 1924 char *pg_result; 1925 1926 if (count < 1) { 1927 // sprintf(pg_result, "Wrong command format"); 1928 return -EINVAL; 1929 } 1930 1931 max = count; 1932 len = count_trail_chars(user_buffer, max); 1933 if (len < 0) 1934 return len; 1935 1936 i = len; 1937 1938 /* Read variable name */ 1939 max = min(sizeof(name) - 1, count - i); 1940 len = strn_len(&user_buffer[i], max); 1941 if (len < 0) 1942 return len; 1943 1944 memset(name, 0, sizeof(name)); 1945 if (copy_from_user(name, &user_buffer[i], len)) 1946 return -EFAULT; 1947 i += len; 1948 1949 max = count - i; 1950 len = count_trail_chars(&user_buffer[i], max); 1951 if (len < 0) 1952 return len; 1953 1954 i += len; 1955 1956 if (debug) 1957 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1958 1959 if (!t) { 1960 pr_err("ERROR: No thread\n"); 1961 ret = -EINVAL; 1962 goto out; 1963 } 1964 1965 pg_result = &(t->result[0]); 1966 1967 if (!strcmp(name, "add_device")) { 1968 char f[32]; 1969 1970 memset(f, 0, 32); 1971 max = min(sizeof(f) - 1, count - i); 1972 len = strn_len(&user_buffer[i], max); 1973 if (len < 0) { 1974 ret = len; 1975 goto out; 1976 } 1977 if (copy_from_user(f, &user_buffer[i], len)) 1978 return -EFAULT; 1979 1980 mutex_lock(&pktgen_thread_lock); 1981 ret = pktgen_add_device(t, f); 1982 mutex_unlock(&pktgen_thread_lock); 1983 if (!ret) { 1984 ret = count; 1985 sprintf(pg_result, "OK: add_device=%s", f); 1986 } else 1987 sprintf(pg_result, "ERROR: can not add device %s", f); 1988 goto out; 1989 } 1990 1991 if (!strcmp(name, "rem_device_all")) { 1992 mutex_lock(&pktgen_thread_lock); 1993 t->control |= T_REMDEVALL; 1994 mutex_unlock(&pktgen_thread_lock); 1995 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1996 ret = count; 1997 sprintf(pg_result, "OK: rem_device_all"); 1998 goto out; 1999 } 2000 2001 if (!strcmp(name, "max_before_softirq")) { 2002 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 2003 ret = count; 2004 goto out; 2005 } 2006 2007 ret = -EINVAL; 2008 out: 2009 return ret; 2010 } 2011 2012 static int pktgen_thread_open(struct inode *inode, struct file *file) 2013 { 2014 return single_open(file, pktgen_thread_show, pde_data(inode)); 2015 } 2016 2017 static const struct proc_ops pktgen_thread_proc_ops = { 2018 .proc_open = pktgen_thread_open, 2019 .proc_read = seq_read, 2020 .proc_lseek = seq_lseek, 2021 .proc_write = pktgen_thread_write, 2022 .proc_release = single_release, 2023 }; 2024 2025 /* Think find or remove for NN */ 2026 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, 2027 const char *ifname, int remove) 2028 { 2029 struct pktgen_thread *t; 2030 struct pktgen_dev *pkt_dev = NULL; 2031 bool exact = (remove == FIND); 2032 2033 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 2034 pkt_dev = pktgen_find_dev(t, ifname, exact); 2035 if (pkt_dev) { 2036 if (remove) { 2037 pkt_dev->removal_mark = 1; 2038 t->control |= T_REMDEV; 2039 } 2040 break; 2041 } 2042 } 2043 return pkt_dev; 2044 } 2045 2046 /* 2047 * mark a device for removal 2048 */ 2049 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) 2050 { 2051 struct pktgen_dev *pkt_dev = NULL; 2052 const int max_tries = 10, msec_per_try = 125; 2053 int i = 0; 2054 2055 mutex_lock(&pktgen_thread_lock); 2056 pr_debug("%s: marking %s for removal\n", __func__, ifname); 2057 2058 while (1) { 2059 2060 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); 2061 if (pkt_dev == NULL) 2062 break; /* success */ 2063 2064 mutex_unlock(&pktgen_thread_lock); 2065 pr_debug("%s: waiting for %s to disappear....\n", 2066 __func__, ifname); 2067 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 2068 mutex_lock(&pktgen_thread_lock); 2069 2070 if (++i >= max_tries) { 2071 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 2072 __func__, msec_per_try * i, ifname); 2073 break; 2074 } 2075 2076 } 2077 2078 mutex_unlock(&pktgen_thread_lock); 2079 } 2080 2081 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) 2082 { 2083 struct pktgen_thread *t; 2084 2085 mutex_lock(&pktgen_thread_lock); 2086 2087 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 2088 struct pktgen_dev *pkt_dev; 2089 2090 if_lock(t); 2091 list_for_each_entry(pkt_dev, &t->if_list, list) { 2092 if (pkt_dev->odev != dev) 2093 continue; 2094 2095 proc_remove(pkt_dev->entry); 2096 2097 pkt_dev->entry = proc_create_data(dev->name, 0600, 2098 pn->proc_dir, 2099 &pktgen_if_proc_ops, 2100 pkt_dev); 2101 if (!pkt_dev->entry) 2102 pr_err("can't move proc entry for '%s'\n", 2103 dev->name); 2104 break; 2105 } 2106 if_unlock(t); 2107 } 2108 mutex_unlock(&pktgen_thread_lock); 2109 } 2110 2111 static int pktgen_device_event(struct notifier_block *unused, 2112 unsigned long event, void *ptr) 2113 { 2114 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2115 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); 2116 2117 if (pn->pktgen_exiting) 2118 return NOTIFY_DONE; 2119 2120 /* It is OK that we do not hold the group lock right now, 2121 * as we run under the RTNL lock. 2122 */ 2123 2124 switch (event) { 2125 case NETDEV_CHANGENAME: 2126 pktgen_change_name(pn, dev); 2127 break; 2128 2129 case NETDEV_UNREGISTER: 2130 pktgen_mark_device(pn, dev->name); 2131 break; 2132 } 2133 2134 return NOTIFY_DONE; 2135 } 2136 2137 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, 2138 struct pktgen_dev *pkt_dev, 2139 const char *ifname) 2140 { 2141 char b[IFNAMSIZ+5]; 2142 int i; 2143 2144 for (i = 0; ifname[i] != '@'; i++) { 2145 if (i == IFNAMSIZ) 2146 break; 2147 2148 b[i] = ifname[i]; 2149 } 2150 b[i] = 0; 2151 2152 return dev_get_by_name(pn->net, b); 2153 } 2154 2155 2156 /* Associate pktgen_dev with a device. */ 2157 2158 static int pktgen_setup_dev(const struct pktgen_net *pn, 2159 struct pktgen_dev *pkt_dev, const char *ifname) 2160 { 2161 struct net_device *odev; 2162 int err; 2163 2164 /* Clean old setups */ 2165 if (pkt_dev->odev) { 2166 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker); 2167 pkt_dev->odev = NULL; 2168 } 2169 2170 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); 2171 if (!odev) { 2172 pr_err("no such netdevice: \"%s\"\n", ifname); 2173 return -ENODEV; 2174 } 2175 2176 if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) { 2177 pr_err("not an ethernet or loopback device: \"%s\"\n", ifname); 2178 err = -EINVAL; 2179 } else if (!netif_running(odev)) { 2180 pr_err("device is down: \"%s\"\n", ifname); 2181 err = -ENETDOWN; 2182 } else { 2183 pkt_dev->odev = odev; 2184 netdev_tracker_alloc(odev, &pkt_dev->dev_tracker, GFP_KERNEL); 2185 return 0; 2186 } 2187 2188 dev_put(odev); 2189 return err; 2190 } 2191 2192 /* Read pkt_dev from the interface and set up internal pktgen_dev 2193 * structure to have the right information to create/send packets 2194 */ 2195 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2196 { 2197 int ntxq; 2198 2199 if (!pkt_dev->odev) { 2200 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2201 sprintf(pkt_dev->result, 2202 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2203 return; 2204 } 2205 2206 /* make sure that we don't pick a non-existing transmit queue */ 2207 ntxq = pkt_dev->odev->real_num_tx_queues; 2208 2209 if (ntxq <= pkt_dev->queue_map_min) { 2210 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2211 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2212 pkt_dev->odevname); 2213 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2214 } 2215 if (pkt_dev->queue_map_max >= ntxq) { 2216 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2217 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2218 pkt_dev->odevname); 2219 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2220 } 2221 2222 /* Default to the interface's mac if not explicitly set. */ 2223 2224 if (is_zero_ether_addr(pkt_dev->src_mac)) 2225 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); 2226 2227 /* Set up Dest MAC */ 2228 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); 2229 2230 if (pkt_dev->flags & F_IPV6) { 2231 int i, set = 0, err = 1; 2232 struct inet6_dev *idev; 2233 2234 if (pkt_dev->min_pkt_size == 0) { 2235 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2236 + sizeof(struct udphdr) 2237 + sizeof(struct pktgen_hdr) 2238 + pkt_dev->pkt_overhead; 2239 } 2240 2241 for (i = 0; i < sizeof(struct in6_addr); i++) 2242 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2243 set = 1; 2244 break; 2245 } 2246 2247 if (!set) { 2248 2249 /* 2250 * Use linklevel address if unconfigured. 2251 * 2252 * use ipv6_get_lladdr if/when it's get exported 2253 */ 2254 2255 rcu_read_lock(); 2256 idev = __in6_dev_get(pkt_dev->odev); 2257 if (idev) { 2258 struct inet6_ifaddr *ifp; 2259 2260 read_lock_bh(&idev->lock); 2261 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2262 if ((ifp->scope & IFA_LINK) && 2263 !(ifp->flags & IFA_F_TENTATIVE)) { 2264 pkt_dev->cur_in6_saddr = ifp->addr; 2265 err = 0; 2266 break; 2267 } 2268 } 2269 read_unlock_bh(&idev->lock); 2270 } 2271 rcu_read_unlock(); 2272 if (err) 2273 pr_err("ERROR: IPv6 link address not available\n"); 2274 } 2275 } else { 2276 if (pkt_dev->min_pkt_size == 0) { 2277 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2278 + sizeof(struct udphdr) 2279 + sizeof(struct pktgen_hdr) 2280 + pkt_dev->pkt_overhead; 2281 } 2282 2283 pkt_dev->saddr_min = 0; 2284 pkt_dev->saddr_max = 0; 2285 if (strlen(pkt_dev->src_min) == 0) { 2286 2287 struct in_device *in_dev; 2288 2289 rcu_read_lock(); 2290 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2291 if (in_dev) { 2292 const struct in_ifaddr *ifa; 2293 2294 ifa = rcu_dereference(in_dev->ifa_list); 2295 if (ifa) { 2296 pkt_dev->saddr_min = ifa->ifa_address; 2297 pkt_dev->saddr_max = pkt_dev->saddr_min; 2298 } 2299 } 2300 rcu_read_unlock(); 2301 } else { 2302 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2303 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2304 } 2305 2306 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2307 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2308 } 2309 /* Initialize current values. */ 2310 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2311 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2312 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2313 2314 pkt_dev->cur_dst_mac_offset = 0; 2315 pkt_dev->cur_src_mac_offset = 0; 2316 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2317 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2318 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2319 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2320 pkt_dev->nflows = 0; 2321 } 2322 2323 2324 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2325 { 2326 ktime_t start_time, end_time; 2327 s64 remaining; 2328 struct hrtimer_sleeper t; 2329 2330 hrtimer_setup_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2331 hrtimer_set_expires(&t.timer, spin_until); 2332 2333 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2334 if (remaining <= 0) 2335 goto out; 2336 2337 start_time = ktime_get(); 2338 if (remaining < 100000) { 2339 /* for small delays (<100us), just loop until limit is reached */ 2340 do { 2341 end_time = ktime_get(); 2342 } while (ktime_compare(end_time, spin_until) < 0); 2343 } else { 2344 do { 2345 set_current_state(TASK_INTERRUPTIBLE); 2346 hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS); 2347 2348 if (likely(t.task)) 2349 schedule(); 2350 2351 hrtimer_cancel(&t.timer); 2352 } while (t.task && pkt_dev->running && !signal_pending(current)); 2353 __set_current_state(TASK_RUNNING); 2354 end_time = ktime_get(); 2355 } 2356 2357 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2358 out: 2359 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2360 destroy_hrtimer_on_stack(&t.timer); 2361 } 2362 2363 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2364 { 2365 pkt_dev->pkt_overhead = 0; 2366 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2367 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2368 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2369 } 2370 2371 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2372 { 2373 return !!(pkt_dev->flows[flow].flags & F_INIT); 2374 } 2375 2376 static inline int f_pick(struct pktgen_dev *pkt_dev) 2377 { 2378 int flow = pkt_dev->curfl; 2379 2380 if (pkt_dev->flags & F_FLOW_SEQ) { 2381 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2382 /* reset time */ 2383 pkt_dev->flows[flow].count = 0; 2384 pkt_dev->flows[flow].flags = 0; 2385 pkt_dev->curfl += 1; 2386 if (pkt_dev->curfl >= pkt_dev->cflows) 2387 pkt_dev->curfl = 0; /*reset */ 2388 } 2389 } else { 2390 flow = get_random_u32_below(pkt_dev->cflows); 2391 pkt_dev->curfl = flow; 2392 2393 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2394 pkt_dev->flows[flow].count = 0; 2395 pkt_dev->flows[flow].flags = 0; 2396 } 2397 } 2398 2399 return pkt_dev->curfl; 2400 } 2401 2402 2403 /* If there was already an IPSEC SA, we keep it as is, else 2404 * we go look for it ... 2405 */ 2406 #define DUMMY_MARK 0 2407 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2408 { 2409 #ifdef CONFIG_XFRM 2410 struct xfrm_state *x = pkt_dev->flows[flow].x; 2411 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); 2412 2413 if (!x) { 2414 2415 if (pkt_dev->spi) { 2416 /* We need as quick as possible to find the right SA 2417 * Searching with minimum criteria to achieve, this. 2418 */ 2419 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); 2420 } else { 2421 /* slow path: we don't already have xfrm_state */ 2422 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0, 2423 (xfrm_address_t *)&pkt_dev->cur_daddr, 2424 (xfrm_address_t *)&pkt_dev->cur_saddr, 2425 AF_INET, 2426 pkt_dev->ipsmode, 2427 pkt_dev->ipsproto, 0); 2428 } 2429 if (x) { 2430 pkt_dev->flows[flow].x = x; 2431 set_pkt_overhead(pkt_dev); 2432 pkt_dev->pkt_overhead += x->props.header_len; 2433 } 2434 2435 } 2436 #endif 2437 } 2438 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2439 { 2440 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2441 pkt_dev->cur_queue_map = smp_processor_id(); 2442 2443 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2444 __u16 t; 2445 2446 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2447 t = get_random_u32_inclusive(pkt_dev->queue_map_min, 2448 pkt_dev->queue_map_max); 2449 } else { 2450 t = pkt_dev->cur_queue_map + 1; 2451 if (t > pkt_dev->queue_map_max) 2452 t = pkt_dev->queue_map_min; 2453 } 2454 pkt_dev->cur_queue_map = t; 2455 } 2456 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2457 } 2458 2459 /* Increment/randomize headers according to flags and current values 2460 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2461 */ 2462 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2463 { 2464 __u32 imn; 2465 __u32 imx; 2466 int flow = 0; 2467 2468 if (pkt_dev->cflows) 2469 flow = f_pick(pkt_dev); 2470 2471 /* Deal with source MAC */ 2472 if (pkt_dev->src_mac_count > 1) { 2473 __u32 mc; 2474 __u32 tmp; 2475 2476 if (pkt_dev->flags & F_MACSRC_RND) 2477 mc = get_random_u32_below(pkt_dev->src_mac_count); 2478 else { 2479 mc = pkt_dev->cur_src_mac_offset++; 2480 if (pkt_dev->cur_src_mac_offset >= 2481 pkt_dev->src_mac_count) 2482 pkt_dev->cur_src_mac_offset = 0; 2483 } 2484 2485 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2486 pkt_dev->hh[11] = tmp; 2487 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2488 pkt_dev->hh[10] = tmp; 2489 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2490 pkt_dev->hh[9] = tmp; 2491 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2492 pkt_dev->hh[8] = tmp; 2493 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2494 pkt_dev->hh[7] = tmp; 2495 } 2496 2497 /* Deal with Destination MAC */ 2498 if (pkt_dev->dst_mac_count > 1) { 2499 __u32 mc; 2500 __u32 tmp; 2501 2502 if (pkt_dev->flags & F_MACDST_RND) 2503 mc = get_random_u32_below(pkt_dev->dst_mac_count); 2504 2505 else { 2506 mc = pkt_dev->cur_dst_mac_offset++; 2507 if (pkt_dev->cur_dst_mac_offset >= 2508 pkt_dev->dst_mac_count) { 2509 pkt_dev->cur_dst_mac_offset = 0; 2510 } 2511 } 2512 2513 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2514 pkt_dev->hh[5] = tmp; 2515 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2516 pkt_dev->hh[4] = tmp; 2517 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2518 pkt_dev->hh[3] = tmp; 2519 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2520 pkt_dev->hh[2] = tmp; 2521 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2522 pkt_dev->hh[1] = tmp; 2523 } 2524 2525 if (pkt_dev->flags & F_MPLS_RND) { 2526 unsigned int i; 2527 2528 for (i = 0; i < pkt_dev->nr_labels; i++) 2529 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2530 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2531 ((__force __be32)get_random_u32() & 2532 htonl(0x000fffff)); 2533 } 2534 2535 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2536 pkt_dev->vlan_id = get_random_u32_below(4096); 2537 } 2538 2539 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2540 pkt_dev->svlan_id = get_random_u32_below(4096); 2541 } 2542 2543 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2544 if (pkt_dev->flags & F_UDPSRC_RND) 2545 pkt_dev->cur_udp_src = get_random_u32_inclusive(pkt_dev->udp_src_min, 2546 pkt_dev->udp_src_max - 1); 2547 2548 else { 2549 pkt_dev->cur_udp_src++; 2550 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2551 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2552 } 2553 } 2554 2555 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2556 if (pkt_dev->flags & F_UDPDST_RND) { 2557 pkt_dev->cur_udp_dst = get_random_u32_inclusive(pkt_dev->udp_dst_min, 2558 pkt_dev->udp_dst_max - 1); 2559 } else { 2560 pkt_dev->cur_udp_dst++; 2561 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2562 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2563 } 2564 } 2565 2566 if (!(pkt_dev->flags & F_IPV6)) { 2567 2568 imn = ntohl(pkt_dev->saddr_min); 2569 imx = ntohl(pkt_dev->saddr_max); 2570 if (imn < imx) { 2571 __u32 t; 2572 2573 if (pkt_dev->flags & F_IPSRC_RND) 2574 t = get_random_u32_inclusive(imn, imx - 1); 2575 else { 2576 t = ntohl(pkt_dev->cur_saddr); 2577 t++; 2578 if (t > imx) 2579 t = imn; 2580 2581 } 2582 pkt_dev->cur_saddr = htonl(t); 2583 } 2584 2585 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2586 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2587 } else { 2588 imn = ntohl(pkt_dev->daddr_min); 2589 imx = ntohl(pkt_dev->daddr_max); 2590 if (imn < imx) { 2591 __u32 t; 2592 __be32 s; 2593 2594 if (pkt_dev->flags & F_IPDST_RND) { 2595 2596 do { 2597 t = get_random_u32_inclusive(imn, imx - 1); 2598 s = htonl(t); 2599 } while (ipv4_is_loopback(s) || 2600 ipv4_is_multicast(s) || 2601 ipv4_is_lbcast(s) || 2602 ipv4_is_zeronet(s) || 2603 ipv4_is_local_multicast(s)); 2604 pkt_dev->cur_daddr = s; 2605 } else { 2606 t = ntohl(pkt_dev->cur_daddr); 2607 t++; 2608 if (t > imx) { 2609 t = imn; 2610 } 2611 pkt_dev->cur_daddr = htonl(t); 2612 } 2613 } 2614 if (pkt_dev->cflows) { 2615 pkt_dev->flows[flow].flags |= F_INIT; 2616 pkt_dev->flows[flow].cur_daddr = 2617 pkt_dev->cur_daddr; 2618 if (pkt_dev->flags & F_IPSEC) 2619 get_ipsec_sa(pkt_dev, flow); 2620 pkt_dev->nflows++; 2621 } 2622 } 2623 } else { /* IPV6 * */ 2624 2625 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { 2626 int i; 2627 2628 /* Only random destinations yet */ 2629 2630 for (i = 0; i < 4; i++) { 2631 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2632 (((__force __be32)get_random_u32() | 2633 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2634 pkt_dev->max_in6_daddr.s6_addr32[i]); 2635 } 2636 } 2637 } 2638 2639 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2640 __u32 t; 2641 2642 if (pkt_dev->flags & F_TXSIZE_RND) { 2643 t = get_random_u32_inclusive(pkt_dev->min_pkt_size, 2644 pkt_dev->max_pkt_size - 1); 2645 } else { 2646 t = pkt_dev->cur_pkt_size + 1; 2647 if (t > pkt_dev->max_pkt_size) 2648 t = pkt_dev->min_pkt_size; 2649 } 2650 pkt_dev->cur_pkt_size = t; 2651 } else if (pkt_dev->n_imix_entries > 0) { 2652 struct imix_pkt *entry; 2653 __u32 t = get_random_u32_below(IMIX_PRECISION); 2654 __u8 entry_index = pkt_dev->imix_distribution[t]; 2655 2656 entry = &pkt_dev->imix_entries[entry_index]; 2657 entry->count_so_far++; 2658 pkt_dev->cur_pkt_size = entry->size; 2659 } 2660 2661 set_cur_queue_map(pkt_dev); 2662 2663 pkt_dev->flows[flow].count++; 2664 } 2665 2666 static void fill_imix_distribution(struct pktgen_dev *pkt_dev) 2667 { 2668 int cumulative_probabilites[MAX_IMIX_ENTRIES]; 2669 int j = 0; 2670 __u64 cumulative_prob = 0; 2671 __u64 total_weight = 0; 2672 int i = 0; 2673 2674 for (i = 0; i < pkt_dev->n_imix_entries; i++) 2675 total_weight += pkt_dev->imix_entries[i].weight; 2676 2677 /* Fill cumulative_probabilites with sum of normalized probabilities */ 2678 for (i = 0; i < pkt_dev->n_imix_entries - 1; i++) { 2679 cumulative_prob += div64_u64(pkt_dev->imix_entries[i].weight * 2680 IMIX_PRECISION, 2681 total_weight); 2682 cumulative_probabilites[i] = cumulative_prob; 2683 } 2684 cumulative_probabilites[pkt_dev->n_imix_entries - 1] = 100; 2685 2686 for (i = 0; i < IMIX_PRECISION; i++) { 2687 if (i == cumulative_probabilites[j]) 2688 j++; 2689 pkt_dev->imix_distribution[i] = j; 2690 } 2691 } 2692 2693 #ifdef CONFIG_XFRM 2694 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { 2695 2696 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ 2697 }; 2698 2699 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2700 { 2701 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2702 int err = 0; 2703 struct net *net = dev_net(pkt_dev->odev); 2704 2705 if (!x) 2706 return 0; 2707 /* XXX: we dont support tunnel mode for now until 2708 * we resolve the dst issue 2709 */ 2710 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) 2711 return 0; 2712 2713 /* But when user specify an valid SPI, transformation 2714 * supports both transport/tunnel mode + ESP/AH type. 2715 */ 2716 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) 2717 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF; 2718 2719 rcu_read_lock_bh(); 2720 err = pktgen_xfrm_outer_mode_output(x, skb); 2721 rcu_read_unlock_bh(); 2722 if (err) { 2723 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); 2724 goto error; 2725 } 2726 err = x->type->output(x, skb); 2727 if (err) { 2728 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); 2729 goto error; 2730 } 2731 spin_lock_bh(&x->lock); 2732 x->curlft.bytes += skb->len; 2733 x->curlft.packets++; 2734 spin_unlock_bh(&x->lock); 2735 error: 2736 return err; 2737 } 2738 2739 static void free_SAs(struct pktgen_dev *pkt_dev) 2740 { 2741 if (pkt_dev->cflows) { 2742 /* let go of the SAs if we have them */ 2743 int i; 2744 2745 for (i = 0; i < pkt_dev->cflows; i++) { 2746 struct xfrm_state *x = pkt_dev->flows[i].x; 2747 2748 if (x) { 2749 xfrm_state_put(x); 2750 pkt_dev->flows[i].x = NULL; 2751 } 2752 } 2753 } 2754 } 2755 2756 static int process_ipsec(struct pktgen_dev *pkt_dev, 2757 struct sk_buff *skb, __be16 protocol) 2758 { 2759 if (pkt_dev->flags & F_IPSEC) { 2760 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2761 int nhead = 0; 2762 2763 if (x) { 2764 struct ethhdr *eth; 2765 struct iphdr *iph; 2766 int ret; 2767 2768 nhead = x->props.header_len - skb_headroom(skb); 2769 if (nhead > 0) { 2770 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2771 if (ret < 0) { 2772 pr_err("Error expanding ipsec packet %d\n", 2773 ret); 2774 goto err; 2775 } 2776 } 2777 2778 /* ipsec is not expecting ll header */ 2779 skb_pull(skb, ETH_HLEN); 2780 ret = pktgen_output_ipsec(skb, pkt_dev); 2781 if (ret) { 2782 pr_err("Error creating ipsec packet %d\n", ret); 2783 goto err; 2784 } 2785 /* restore ll */ 2786 eth = skb_push(skb, ETH_HLEN); 2787 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN); 2788 eth->h_proto = protocol; 2789 2790 /* Update IPv4 header len as well as checksum value */ 2791 iph = ip_hdr(skb); 2792 iph->tot_len = htons(skb->len - ETH_HLEN); 2793 ip_send_check(iph); 2794 } 2795 } 2796 return 1; 2797 err: 2798 kfree_skb(skb); 2799 return 0; 2800 } 2801 #endif 2802 2803 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2804 { 2805 unsigned int i; 2806 2807 for (i = 0; i < pkt_dev->nr_labels; i++) 2808 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2809 2810 mpls--; 2811 *mpls |= MPLS_STACK_BOTTOM; 2812 } 2813 2814 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2815 unsigned int prio) 2816 { 2817 return htons(id | (cfi << 12) | (prio << 13)); 2818 } 2819 2820 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2821 int datalen) 2822 { 2823 struct timespec64 timestamp; 2824 struct pktgen_hdr *pgh; 2825 2826 pgh = skb_put(skb, sizeof(*pgh)); 2827 datalen -= sizeof(*pgh); 2828 2829 if (pkt_dev->nfrags <= 0) { 2830 skb_put_zero(skb, datalen); 2831 } else { 2832 int frags = pkt_dev->nfrags; 2833 int i, len; 2834 int frag_len; 2835 2836 2837 if (frags > MAX_SKB_FRAGS) 2838 frags = MAX_SKB_FRAGS; 2839 len = datalen - frags * PAGE_SIZE; 2840 if (len > 0) { 2841 skb_put_zero(skb, len); 2842 datalen = frags * PAGE_SIZE; 2843 } 2844 2845 i = 0; 2846 frag_len = min_t(int, datalen / frags, PAGE_SIZE); 2847 while (datalen > 0) { 2848 if (unlikely(!pkt_dev->page)) { 2849 int node = numa_node_id(); 2850 2851 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2852 node = pkt_dev->node; 2853 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2854 if (!pkt_dev->page) 2855 break; 2856 } 2857 get_page(pkt_dev->page); 2858 2859 /*last fragment, fill rest of data*/ 2860 if (i == (frags - 1)) 2861 skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i], 2862 pkt_dev->page, 0, 2863 min(datalen, PAGE_SIZE)); 2864 else 2865 skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i], 2866 pkt_dev->page, 0, frag_len); 2867 2868 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2869 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2870 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2871 i++; 2872 skb_shinfo(skb)->nr_frags = i; 2873 } 2874 } 2875 2876 /* Stamp the time, and sequence number, 2877 * convert them to network byte order 2878 */ 2879 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2880 pgh->seq_num = htonl(pkt_dev->seq_num); 2881 2882 if (pkt_dev->flags & F_NO_TIMESTAMP) { 2883 pgh->tv_sec = 0; 2884 pgh->tv_usec = 0; 2885 } else { 2886 /* 2887 * pgh->tv_sec wraps in y2106 when interpreted as unsigned 2888 * as done by wireshark, or y2038 when interpreted as signed. 2889 * This is probably harmless, but if anyone wants to improve 2890 * it, we could introduce a variant that puts 64-bit nanoseconds 2891 * into the respective header bytes. 2892 * This would also be slightly faster to read. 2893 */ 2894 ktime_get_real_ts64(×tamp); 2895 pgh->tv_sec = htonl(timestamp.tv_sec); 2896 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC); 2897 } 2898 } 2899 2900 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, 2901 struct pktgen_dev *pkt_dev) 2902 { 2903 unsigned int extralen = LL_RESERVED_SPACE(dev); 2904 struct sk_buff *skb = NULL; 2905 unsigned int size; 2906 2907 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead; 2908 if (pkt_dev->flags & F_NODE) { 2909 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); 2910 2911 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); 2912 if (likely(skb)) { 2913 skb_reserve(skb, NET_SKB_PAD); 2914 skb->dev = dev; 2915 } 2916 } else { 2917 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); 2918 } 2919 2920 /* the caller pre-fetches from skb->data and reserves for the mac hdr */ 2921 if (likely(skb)) 2922 skb_reserve(skb, extralen - 16); 2923 2924 return skb; 2925 } 2926 2927 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2928 struct pktgen_dev *pkt_dev) 2929 { 2930 struct sk_buff *skb = NULL; 2931 __u8 *eth; 2932 struct udphdr *udph; 2933 int datalen, iplen; 2934 struct iphdr *iph; 2935 __be16 protocol = htons(ETH_P_IP); 2936 __be32 *mpls; 2937 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2938 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2939 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2940 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2941 u16 queue_map; 2942 2943 if (pkt_dev->nr_labels) 2944 protocol = htons(ETH_P_MPLS_UC); 2945 2946 if (pkt_dev->vlan_id != 0xffff) 2947 protocol = htons(ETH_P_8021Q); 2948 2949 /* Update any of the values, used when we're incrementing various 2950 * fields. 2951 */ 2952 mod_cur_headers(pkt_dev); 2953 queue_map = pkt_dev->cur_queue_map; 2954 2955 skb = pktgen_alloc_skb(odev, pkt_dev); 2956 if (!skb) { 2957 sprintf(pkt_dev->result, "No memory"); 2958 return NULL; 2959 } 2960 2961 prefetchw(skb->data); 2962 skb_reserve(skb, 16); 2963 2964 /* Reserve for ethernet and IP header */ 2965 eth = skb_push(skb, 14); 2966 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); 2967 if (pkt_dev->nr_labels) 2968 mpls_push(mpls, pkt_dev); 2969 2970 if (pkt_dev->vlan_id != 0xffff) { 2971 if (pkt_dev->svlan_id != 0xffff) { 2972 svlan_tci = skb_put(skb, sizeof(__be16)); 2973 *svlan_tci = build_tci(pkt_dev->svlan_id, 2974 pkt_dev->svlan_cfi, 2975 pkt_dev->svlan_p); 2976 svlan_encapsulated_proto = skb_put(skb, 2977 sizeof(__be16)); 2978 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2979 } 2980 vlan_tci = skb_put(skb, sizeof(__be16)); 2981 *vlan_tci = build_tci(pkt_dev->vlan_id, 2982 pkt_dev->vlan_cfi, 2983 pkt_dev->vlan_p); 2984 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); 2985 *vlan_encapsulated_proto = htons(ETH_P_IP); 2986 } 2987 2988 skb_reset_mac_header(skb); 2989 skb_set_network_header(skb, skb->len); 2990 iph = skb_put(skb, sizeof(struct iphdr)); 2991 2992 skb_set_transport_header(skb, skb->len); 2993 udph = skb_put(skb, sizeof(struct udphdr)); 2994 skb_set_queue_mapping(skb, queue_map); 2995 skb->priority = pkt_dev->skb_priority; 2996 2997 memcpy(eth, pkt_dev->hh, 12); 2998 *(__be16 *)ð[12] = protocol; 2999 3000 /* Eth + IPh + UDPh + mpls */ 3001 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 3002 pkt_dev->pkt_overhead; 3003 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 3004 datalen = sizeof(struct pktgen_hdr); 3005 3006 udph->source = htons(pkt_dev->cur_udp_src); 3007 udph->dest = htons(pkt_dev->cur_udp_dst); 3008 udph->len = htons(datalen + 8); /* DATA + udphdr */ 3009 udph->check = 0; 3010 3011 iph->ihl = 5; 3012 iph->version = 4; 3013 iph->ttl = 32; 3014 iph->tos = pkt_dev->tos; 3015 iph->protocol = IPPROTO_UDP; /* UDP */ 3016 iph->saddr = pkt_dev->cur_saddr; 3017 iph->daddr = pkt_dev->cur_daddr; 3018 iph->id = htons(pkt_dev->ip_id); 3019 pkt_dev->ip_id++; 3020 iph->frag_off = 0; 3021 iplen = 20 + 8 + datalen; 3022 iph->tot_len = htons(iplen); 3023 ip_send_check(iph); 3024 skb->protocol = protocol; 3025 skb->dev = odev; 3026 skb->pkt_type = PACKET_HOST; 3027 3028 pktgen_finalize_skb(pkt_dev, skb, datalen); 3029 3030 if (!(pkt_dev->flags & F_UDPCSUM)) { 3031 skb->ip_summed = CHECKSUM_NONE; 3032 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) { 3033 skb->ip_summed = CHECKSUM_PARTIAL; 3034 skb->csum = 0; 3035 udp4_hwcsum(skb, iph->saddr, iph->daddr); 3036 } else { 3037 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); 3038 3039 /* add protocol-dependent pseudo-header */ 3040 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, 3041 datalen + 8, IPPROTO_UDP, csum); 3042 3043 if (udph->check == 0) 3044 udph->check = CSUM_MANGLED_0; 3045 } 3046 3047 #ifdef CONFIG_XFRM 3048 if (!process_ipsec(pkt_dev, skb, protocol)) 3049 return NULL; 3050 #endif 3051 3052 return skb; 3053 } 3054 3055 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 3056 struct pktgen_dev *pkt_dev) 3057 { 3058 struct sk_buff *skb = NULL; 3059 __u8 *eth; 3060 struct udphdr *udph; 3061 int datalen, udplen; 3062 struct ipv6hdr *iph; 3063 __be16 protocol = htons(ETH_P_IPV6); 3064 __be32 *mpls; 3065 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 3066 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 3067 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 3068 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 3069 u16 queue_map; 3070 3071 if (pkt_dev->nr_labels) 3072 protocol = htons(ETH_P_MPLS_UC); 3073 3074 if (pkt_dev->vlan_id != 0xffff) 3075 protocol = htons(ETH_P_8021Q); 3076 3077 /* Update any of the values, used when we're incrementing various 3078 * fields. 3079 */ 3080 mod_cur_headers(pkt_dev); 3081 queue_map = pkt_dev->cur_queue_map; 3082 3083 skb = pktgen_alloc_skb(odev, pkt_dev); 3084 if (!skb) { 3085 sprintf(pkt_dev->result, "No memory"); 3086 return NULL; 3087 } 3088 3089 prefetchw(skb->data); 3090 skb_reserve(skb, 16); 3091 3092 /* Reserve for ethernet and IP header */ 3093 eth = skb_push(skb, 14); 3094 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); 3095 if (pkt_dev->nr_labels) 3096 mpls_push(mpls, pkt_dev); 3097 3098 if (pkt_dev->vlan_id != 0xffff) { 3099 if (pkt_dev->svlan_id != 0xffff) { 3100 svlan_tci = skb_put(skb, sizeof(__be16)); 3101 *svlan_tci = build_tci(pkt_dev->svlan_id, 3102 pkt_dev->svlan_cfi, 3103 pkt_dev->svlan_p); 3104 svlan_encapsulated_proto = skb_put(skb, 3105 sizeof(__be16)); 3106 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 3107 } 3108 vlan_tci = skb_put(skb, sizeof(__be16)); 3109 *vlan_tci = build_tci(pkt_dev->vlan_id, 3110 pkt_dev->vlan_cfi, 3111 pkt_dev->vlan_p); 3112 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); 3113 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 3114 } 3115 3116 skb_reset_mac_header(skb); 3117 skb_set_network_header(skb, skb->len); 3118 iph = skb_put(skb, sizeof(struct ipv6hdr)); 3119 3120 skb_set_transport_header(skb, skb->len); 3121 udph = skb_put(skb, sizeof(struct udphdr)); 3122 skb_set_queue_mapping(skb, queue_map); 3123 skb->priority = pkt_dev->skb_priority; 3124 3125 memcpy(eth, pkt_dev->hh, 12); 3126 *(__be16 *) ð[12] = protocol; 3127 3128 /* Eth + IPh + UDPh + mpls */ 3129 datalen = pkt_dev->cur_pkt_size - 14 - 3130 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 3131 pkt_dev->pkt_overhead; 3132 3133 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 3134 datalen = sizeof(struct pktgen_hdr); 3135 net_info_ratelimited("increased datalen to %d\n", datalen); 3136 } 3137 3138 udplen = datalen + sizeof(struct udphdr); 3139 udph->source = htons(pkt_dev->cur_udp_src); 3140 udph->dest = htons(pkt_dev->cur_udp_dst); 3141 udph->len = htons(udplen); 3142 udph->check = 0; 3143 3144 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3145 3146 if (pkt_dev->traffic_class) { 3147 /* Version + traffic class + flow (0) */ 3148 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3149 } 3150 3151 iph->hop_limit = 32; 3152 3153 iph->payload_len = htons(udplen); 3154 iph->nexthdr = IPPROTO_UDP; 3155 3156 iph->daddr = pkt_dev->cur_in6_daddr; 3157 iph->saddr = pkt_dev->cur_in6_saddr; 3158 3159 skb->protocol = protocol; 3160 skb->dev = odev; 3161 skb->pkt_type = PACKET_HOST; 3162 3163 pktgen_finalize_skb(pkt_dev, skb, datalen); 3164 3165 if (!(pkt_dev->flags & F_UDPCSUM)) { 3166 skb->ip_summed = CHECKSUM_NONE; 3167 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) { 3168 skb->ip_summed = CHECKSUM_PARTIAL; 3169 skb->csum_start = skb_transport_header(skb) - skb->head; 3170 skb->csum_offset = offsetof(struct udphdr, check); 3171 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); 3172 } else { 3173 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); 3174 3175 /* add protocol-dependent pseudo-header */ 3176 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); 3177 3178 if (udph->check == 0) 3179 udph->check = CSUM_MANGLED_0; 3180 } 3181 3182 return skb; 3183 } 3184 3185 static struct sk_buff *fill_packet(struct net_device *odev, 3186 struct pktgen_dev *pkt_dev) 3187 { 3188 if (pkt_dev->flags & F_IPV6) 3189 return fill_packet_ipv6(odev, pkt_dev); 3190 else 3191 return fill_packet_ipv4(odev, pkt_dev); 3192 } 3193 3194 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3195 { 3196 pkt_dev->seq_num = 1; 3197 pkt_dev->idle_acc = 0; 3198 pkt_dev->sofar = 0; 3199 pkt_dev->tx_bytes = 0; 3200 pkt_dev->errors = 0; 3201 } 3202 3203 /* Set up structure for sending pkts, clear counters */ 3204 3205 static void pktgen_run(struct pktgen_thread *t) 3206 { 3207 struct pktgen_dev *pkt_dev; 3208 int started = 0; 3209 3210 func_enter(); 3211 3212 rcu_read_lock(); 3213 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3214 3215 /* 3216 * setup odev and create initial packet. 3217 */ 3218 pktgen_setup_inject(pkt_dev); 3219 3220 if (pkt_dev->odev) { 3221 pktgen_clear_counters(pkt_dev); 3222 pkt_dev->skb = NULL; 3223 pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); 3224 3225 set_pkt_overhead(pkt_dev); 3226 3227 strscpy(pkt_dev->result, "Starting"); 3228 pkt_dev->running = 1; /* Cranke yeself! */ 3229 started++; 3230 } else 3231 strscpy(pkt_dev->result, "Error starting"); 3232 } 3233 rcu_read_unlock(); 3234 if (started) 3235 t->control &= ~(T_STOP); 3236 } 3237 3238 static void pktgen_handle_all_threads(struct pktgen_net *pn, u32 flags) 3239 { 3240 struct pktgen_thread *t; 3241 3242 mutex_lock(&pktgen_thread_lock); 3243 3244 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3245 t->control |= (flags); 3246 3247 mutex_unlock(&pktgen_thread_lock); 3248 } 3249 3250 static void pktgen_stop_all_threads(struct pktgen_net *pn) 3251 { 3252 func_enter(); 3253 3254 pktgen_handle_all_threads(pn, T_STOP); 3255 } 3256 3257 static int thread_is_running(const struct pktgen_thread *t) 3258 { 3259 const struct pktgen_dev *pkt_dev; 3260 3261 rcu_read_lock(); 3262 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) 3263 if (pkt_dev->running) { 3264 rcu_read_unlock(); 3265 return 1; 3266 } 3267 rcu_read_unlock(); 3268 return 0; 3269 } 3270 3271 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3272 { 3273 while (thread_is_running(t)) { 3274 3275 /* note: 't' will still be around even after the unlock/lock 3276 * cycle because pktgen_thread threads are only cleared at 3277 * net exit 3278 */ 3279 mutex_unlock(&pktgen_thread_lock); 3280 msleep_interruptible(100); 3281 mutex_lock(&pktgen_thread_lock); 3282 3283 if (signal_pending(current)) 3284 goto signal; 3285 } 3286 return 1; 3287 signal: 3288 return 0; 3289 } 3290 3291 static int pktgen_wait_all_threads_run(struct pktgen_net *pn) 3292 { 3293 struct pktgen_thread *t; 3294 int sig = 1; 3295 3296 /* prevent from racing with rmmod */ 3297 if (!try_module_get(THIS_MODULE)) 3298 return sig; 3299 3300 mutex_lock(&pktgen_thread_lock); 3301 3302 list_for_each_entry(t, &pn->pktgen_threads, th_list) { 3303 sig = pktgen_wait_thread_run(t); 3304 if (sig == 0) 3305 break; 3306 } 3307 3308 if (sig == 0) 3309 list_for_each_entry(t, &pn->pktgen_threads, th_list) 3310 t->control |= (T_STOP); 3311 3312 mutex_unlock(&pktgen_thread_lock); 3313 module_put(THIS_MODULE); 3314 return sig; 3315 } 3316 3317 static void pktgen_run_all_threads(struct pktgen_net *pn) 3318 { 3319 func_enter(); 3320 3321 pktgen_handle_all_threads(pn, T_RUN); 3322 3323 /* Propagate thread->control */ 3324 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3325 3326 pktgen_wait_all_threads_run(pn); 3327 } 3328 3329 static void pktgen_reset_all_threads(struct pktgen_net *pn) 3330 { 3331 func_enter(); 3332 3333 pktgen_handle_all_threads(pn, T_REMDEVALL); 3334 3335 /* Propagate thread->control */ 3336 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3337 3338 pktgen_wait_all_threads_run(pn); 3339 } 3340 3341 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3342 { 3343 __u64 bps, mbps, pps; 3344 char *p = pkt_dev->result; 3345 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3346 pkt_dev->started_at); 3347 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3348 3349 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3350 (unsigned long long)ktime_to_us(elapsed), 3351 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3352 (unsigned long long)ktime_to_us(idle), 3353 (unsigned long long)pkt_dev->sofar, 3354 pkt_dev->cur_pkt_size, nr_frags); 3355 3356 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3357 ktime_to_ns(elapsed)); 3358 3359 if (pkt_dev->n_imix_entries > 0) { 3360 int i; 3361 struct imix_pkt *entry; 3362 3363 bps = 0; 3364 for (i = 0; i < pkt_dev->n_imix_entries; i++) { 3365 entry = &pkt_dev->imix_entries[i]; 3366 bps += entry->size * entry->count_so_far; 3367 } 3368 bps = div64_u64(bps * 8 * NSEC_PER_SEC, ktime_to_ns(elapsed)); 3369 } else { 3370 bps = pps * 8 * pkt_dev->cur_pkt_size; 3371 } 3372 3373 mbps = bps; 3374 do_div(mbps, 1000000); 3375 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3376 (unsigned long long)pps, 3377 (unsigned long long)mbps, 3378 (unsigned long long)bps, 3379 (unsigned long long)pkt_dev->errors); 3380 } 3381 3382 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3383 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3384 { 3385 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3386 3387 if (!pkt_dev->running) { 3388 pr_warn("interface: %s is already stopped\n", 3389 pkt_dev->odevname); 3390 return -EINVAL; 3391 } 3392 3393 pkt_dev->running = 0; 3394 kfree_skb(pkt_dev->skb); 3395 pkt_dev->skb = NULL; 3396 pkt_dev->stopped_at = ktime_get(); 3397 3398 show_results(pkt_dev, nr_frags); 3399 3400 return 0; 3401 } 3402 3403 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3404 { 3405 struct pktgen_dev *pkt_dev, *best = NULL; 3406 3407 rcu_read_lock(); 3408 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3409 if (!pkt_dev->running) 3410 continue; 3411 if (best == NULL) 3412 best = pkt_dev; 3413 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) 3414 best = pkt_dev; 3415 } 3416 rcu_read_unlock(); 3417 3418 return best; 3419 } 3420 3421 static void pktgen_stop(struct pktgen_thread *t) 3422 { 3423 struct pktgen_dev *pkt_dev; 3424 3425 func_enter(); 3426 3427 rcu_read_lock(); 3428 3429 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { 3430 pktgen_stop_device(pkt_dev); 3431 } 3432 3433 rcu_read_unlock(); 3434 } 3435 3436 /* 3437 * one of our devices needs to be removed - find it 3438 * and remove it 3439 */ 3440 static void pktgen_rem_one_if(struct pktgen_thread *t) 3441 { 3442 struct list_head *q, *n; 3443 struct pktgen_dev *cur; 3444 3445 func_enter(); 3446 3447 list_for_each_safe(q, n, &t->if_list) { 3448 cur = list_entry(q, struct pktgen_dev, list); 3449 3450 if (!cur->removal_mark) 3451 continue; 3452 3453 kfree_skb(cur->skb); 3454 cur->skb = NULL; 3455 3456 pktgen_remove_device(t, cur); 3457 3458 break; 3459 } 3460 } 3461 3462 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3463 { 3464 struct list_head *q, *n; 3465 struct pktgen_dev *cur; 3466 3467 func_enter(); 3468 3469 /* Remove all devices, free mem */ 3470 3471 list_for_each_safe(q, n, &t->if_list) { 3472 cur = list_entry(q, struct pktgen_dev, list); 3473 3474 kfree_skb(cur->skb); 3475 cur->skb = NULL; 3476 3477 pktgen_remove_device(t, cur); 3478 } 3479 } 3480 3481 static void pktgen_rem_thread(struct pktgen_thread *t) 3482 { 3483 /* Remove from the thread list */ 3484 remove_proc_entry(t->tsk->comm, t->net->proc_dir); 3485 } 3486 3487 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3488 { 3489 ktime_t idle_start = ktime_get(); 3490 3491 schedule(); 3492 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3493 } 3494 3495 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3496 { 3497 ktime_t idle_start = ktime_get(); 3498 3499 while (refcount_read(&(pkt_dev->skb->users)) != 1) { 3500 if (signal_pending(current)) 3501 break; 3502 3503 if (need_resched()) 3504 pktgen_resched(pkt_dev); 3505 else 3506 cpu_relax(); 3507 } 3508 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); 3509 } 3510 3511 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3512 { 3513 bool skb_shared = !!(READ_ONCE(pkt_dev->flags) & F_SHARED); 3514 struct net_device *odev = pkt_dev->odev; 3515 struct netdev_queue *txq; 3516 unsigned int burst = 1; 3517 struct sk_buff *skb; 3518 int clone_skb = 0; 3519 int ret; 3520 3521 /* If 'skb_shared' is false, the read of possible 3522 * new values (if any) for 'burst' and 'clone_skb' will be skipped to 3523 * prevent some concurrent changes from slipping in. And the stabilized 3524 * config will be read in during the next run of pktgen_xmit. 3525 */ 3526 if (skb_shared) { 3527 burst = READ_ONCE(pkt_dev->burst); 3528 clone_skb = READ_ONCE(pkt_dev->clone_skb); 3529 } 3530 3531 /* If device is offline, then don't send */ 3532 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3533 pktgen_stop_device(pkt_dev); 3534 return; 3535 } 3536 3537 /* This is max DELAY, this has special meaning of 3538 * "never transmit" 3539 */ 3540 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3541 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); 3542 return; 3543 } 3544 3545 /* If no skb or clone count exhausted then get new one */ 3546 if (!pkt_dev->skb || (pkt_dev->last_ok && 3547 ++pkt_dev->clone_count >= clone_skb)) { 3548 /* build a new pkt */ 3549 kfree_skb(pkt_dev->skb); 3550 3551 pkt_dev->skb = fill_packet(odev, pkt_dev); 3552 if (pkt_dev->skb == NULL) { 3553 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3554 schedule(); 3555 pkt_dev->clone_count--; /* back out increment, OOM */ 3556 return; 3557 } 3558 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3559 pkt_dev->clone_count = 0; /* reset counter */ 3560 } 3561 3562 if (pkt_dev->delay && pkt_dev->last_ok) 3563 spin(pkt_dev, pkt_dev->next_tx); 3564 3565 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) { 3566 skb = pkt_dev->skb; 3567 skb->protocol = eth_type_trans(skb, skb->dev); 3568 if (skb_shared) 3569 refcount_add(burst, &skb->users); 3570 local_bh_disable(); 3571 do { 3572 ret = netif_receive_skb(skb); 3573 if (ret == NET_RX_DROP) 3574 pkt_dev->errors++; 3575 pkt_dev->sofar++; 3576 pkt_dev->seq_num++; 3577 if (unlikely(!skb_shared)) { 3578 pkt_dev->skb = NULL; 3579 break; 3580 } 3581 if (refcount_read(&skb->users) != burst) { 3582 /* skb was queued by rps/rfs or taps, 3583 * so cannot reuse this skb 3584 */ 3585 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users)); 3586 /* get out of the loop and wait 3587 * until skb is consumed 3588 */ 3589 break; 3590 } 3591 /* skb was 'freed' by stack, so clean few 3592 * bits and reuse it 3593 */ 3594 skb_reset_redirect(skb); 3595 } while (--burst > 0); 3596 goto out; /* Skips xmit_mode M_START_XMIT */ 3597 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) { 3598 local_bh_disable(); 3599 if (skb_shared) 3600 refcount_inc(&pkt_dev->skb->users); 3601 3602 ret = dev_queue_xmit(pkt_dev->skb); 3603 3604 if (!skb_shared && dev_xmit_complete(ret)) 3605 pkt_dev->skb = NULL; 3606 3607 switch (ret) { 3608 case NET_XMIT_SUCCESS: 3609 pkt_dev->sofar++; 3610 pkt_dev->seq_num++; 3611 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3612 break; 3613 case NET_XMIT_DROP: 3614 case NET_XMIT_CN: 3615 /* These are all valid return codes for a qdisc but 3616 * indicate packets are being dropped or will likely 3617 * be dropped soon. 3618 */ 3619 case NETDEV_TX_BUSY: 3620 /* qdisc may call dev_hard_start_xmit directly in cases 3621 * where no queues exist e.g. loopback device, virtual 3622 * devices, etc. In this case we need to handle 3623 * NETDEV_TX_ codes. 3624 */ 3625 default: 3626 pkt_dev->errors++; 3627 net_info_ratelimited("%s xmit error: %d\n", 3628 pkt_dev->odevname, ret); 3629 break; 3630 } 3631 goto out; 3632 } 3633 3634 txq = skb_get_tx_queue(odev, pkt_dev->skb); 3635 3636 local_bh_disable(); 3637 3638 HARD_TX_LOCK(odev, txq, smp_processor_id()); 3639 3640 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { 3641 pkt_dev->last_ok = 0; 3642 goto unlock; 3643 } 3644 if (skb_shared) 3645 refcount_add(burst, &pkt_dev->skb->users); 3646 3647 xmit_more: 3648 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); 3649 3650 if (!skb_shared && dev_xmit_complete(ret)) 3651 pkt_dev->skb = NULL; 3652 3653 switch (ret) { 3654 case NETDEV_TX_OK: 3655 pkt_dev->last_ok = 1; 3656 pkt_dev->sofar++; 3657 pkt_dev->seq_num++; 3658 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3659 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) 3660 goto xmit_more; 3661 break; 3662 case NET_XMIT_DROP: 3663 case NET_XMIT_CN: 3664 /* skb has been consumed */ 3665 pkt_dev->errors++; 3666 break; 3667 default: /* Drivers are not supposed to return other values! */ 3668 net_info_ratelimited("%s xmit error: %d\n", 3669 pkt_dev->odevname, ret); 3670 pkt_dev->errors++; 3671 fallthrough; 3672 case NETDEV_TX_BUSY: 3673 /* Retry it next time */ 3674 if (skb_shared) 3675 refcount_dec(&pkt_dev->skb->users); 3676 pkt_dev->last_ok = 0; 3677 } 3678 if (unlikely(burst)) 3679 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users)); 3680 unlock: 3681 HARD_TX_UNLOCK(odev, txq); 3682 3683 out: 3684 local_bh_enable(); 3685 3686 /* If pkt_dev->count is zero, then run forever */ 3687 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3688 if (pkt_dev->skb) 3689 pktgen_wait_for_skb(pkt_dev); 3690 3691 /* Done with this */ 3692 pktgen_stop_device(pkt_dev); 3693 } 3694 } 3695 3696 /* 3697 * Main loop of the thread goes here 3698 */ 3699 3700 static int pktgen_thread_worker(void *arg) 3701 { 3702 struct pktgen_thread *t = arg; 3703 struct pktgen_dev *pkt_dev = NULL; 3704 int cpu = t->cpu; 3705 3706 WARN_ON_ONCE(smp_processor_id() != cpu); 3707 3708 init_waitqueue_head(&t->queue); 3709 complete(&t->start_done); 3710 3711 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3712 3713 set_freezable(); 3714 3715 while (!kthread_should_stop()) { 3716 pkt_dev = next_to_run(t); 3717 3718 if (unlikely(!pkt_dev && t->control == 0)) { 3719 if (t->net->pktgen_exiting) 3720 break; 3721 wait_event_freezable_timeout(t->queue, 3722 t->control != 0, HZ / 10); 3723 continue; 3724 } 3725 3726 if (likely(pkt_dev)) { 3727 pktgen_xmit(pkt_dev); 3728 3729 if (need_resched()) 3730 pktgen_resched(pkt_dev); 3731 else 3732 cpu_relax(); 3733 } 3734 3735 if (t->control & T_STOP) { 3736 pktgen_stop(t); 3737 t->control &= ~(T_STOP); 3738 } 3739 3740 if (t->control & T_RUN) { 3741 pktgen_run(t); 3742 t->control &= ~(T_RUN); 3743 } 3744 3745 if (t->control & T_REMDEVALL) { 3746 pktgen_rem_all_ifs(t); 3747 t->control &= ~(T_REMDEVALL); 3748 } 3749 3750 if (t->control & T_REMDEV) { 3751 pktgen_rem_one_if(t); 3752 t->control &= ~(T_REMDEV); 3753 } 3754 3755 try_to_freeze(); 3756 } 3757 3758 pr_debug("%s stopping all device\n", t->tsk->comm); 3759 pktgen_stop(t); 3760 3761 pr_debug("%s removing all device\n", t->tsk->comm); 3762 pktgen_rem_all_ifs(t); 3763 3764 pr_debug("%s removing thread\n", t->tsk->comm); 3765 pktgen_rem_thread(t); 3766 3767 return 0; 3768 } 3769 3770 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3771 const char *ifname, bool exact) 3772 { 3773 struct pktgen_dev *p, *pkt_dev = NULL; 3774 size_t len = strlen(ifname); 3775 3776 rcu_read_lock(); 3777 list_for_each_entry_rcu(p, &t->if_list, list) 3778 if (strncmp(p->odevname, ifname, len) == 0) { 3779 if (p->odevname[len]) { 3780 if (exact || p->odevname[len] != '@') 3781 continue; 3782 } 3783 pkt_dev = p; 3784 break; 3785 } 3786 3787 rcu_read_unlock(); 3788 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3789 return pkt_dev; 3790 } 3791 3792 /* 3793 * Adds a dev at front of if_list. 3794 */ 3795 3796 static int add_dev_to_thread(struct pktgen_thread *t, 3797 struct pktgen_dev *pkt_dev) 3798 { 3799 int rv = 0; 3800 3801 /* This function cannot be called concurrently, as its called 3802 * under pktgen_thread_lock mutex, but it can run from 3803 * userspace on another CPU than the kthread. The if_lock() 3804 * is used here to sync with concurrent instances of 3805 * _rem_dev_from_if_list() invoked via kthread, which is also 3806 * updating the if_list 3807 */ 3808 if_lock(t); 3809 3810 if (pkt_dev->pg_thread) { 3811 pr_err("ERROR: already assigned to a thread\n"); 3812 rv = -EBUSY; 3813 goto out; 3814 } 3815 3816 pkt_dev->running = 0; 3817 pkt_dev->pg_thread = t; 3818 list_add_rcu(&pkt_dev->list, &t->if_list); 3819 3820 out: 3821 if_unlock(t); 3822 return rv; 3823 } 3824 3825 /* Called under thread lock */ 3826 3827 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3828 { 3829 struct pktgen_dev *pkt_dev; 3830 int err; 3831 int node = cpu_to_node(t->cpu); 3832 3833 /* We don't allow a device to be on several threads */ 3834 3835 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); 3836 if (pkt_dev) { 3837 pr_err("ERROR: interface already used\n"); 3838 return -EBUSY; 3839 } 3840 3841 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3842 if (!pkt_dev) 3843 return -ENOMEM; 3844 3845 strscpy(pkt_dev->odevname, ifname); 3846 pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS, 3847 sizeof(struct flow_state)), 3848 node); 3849 if (pkt_dev->flows == NULL) { 3850 kfree(pkt_dev); 3851 return -ENOMEM; 3852 } 3853 3854 pkt_dev->removal_mark = 0; 3855 pkt_dev->nfrags = 0; 3856 pkt_dev->delay = pg_delay_d; 3857 pkt_dev->count = pg_count_d; 3858 pkt_dev->sofar = 0; 3859 pkt_dev->udp_src_min = 9; /* sink port */ 3860 pkt_dev->udp_src_max = 9; 3861 pkt_dev->udp_dst_min = 9; 3862 pkt_dev->udp_dst_max = 9; 3863 pkt_dev->vlan_p = 0; 3864 pkt_dev->vlan_cfi = 0; 3865 pkt_dev->vlan_id = 0xffff; 3866 pkt_dev->svlan_p = 0; 3867 pkt_dev->svlan_cfi = 0; 3868 pkt_dev->svlan_id = 0xffff; 3869 pkt_dev->burst = 1; 3870 pkt_dev->node = NUMA_NO_NODE; 3871 pkt_dev->flags = F_SHARED; /* SKB shared by default */ 3872 3873 err = pktgen_setup_dev(t->net, pkt_dev, ifname); 3874 if (err) 3875 goto out1; 3876 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3877 pkt_dev->clone_skb = pg_clone_skb_d; 3878 3879 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, 3880 &pktgen_if_proc_ops, pkt_dev); 3881 if (!pkt_dev->entry) { 3882 pr_err("cannot create %s/%s procfs entry\n", 3883 PG_PROC_DIR, ifname); 3884 err = -EINVAL; 3885 goto out2; 3886 } 3887 #ifdef CONFIG_XFRM 3888 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3889 pkt_dev->ipsproto = IPPROTO_ESP; 3890 3891 /* xfrm tunnel mode needs additional dst to extract outer 3892 * ip header protocol/ttl/id field, here create a phony one. 3893 * instead of looking for a valid rt, which definitely hurting 3894 * performance under such circumstance. 3895 */ 3896 pkt_dev->dstops.family = AF_INET; 3897 pkt_dev->xdst.u.dst.dev = pkt_dev->odev; 3898 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false); 3899 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst; 3900 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops; 3901 #endif 3902 3903 return add_dev_to_thread(t, pkt_dev); 3904 out2: 3905 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker); 3906 out1: 3907 #ifdef CONFIG_XFRM 3908 free_SAs(pkt_dev); 3909 #endif 3910 vfree(pkt_dev->flows); 3911 kfree(pkt_dev); 3912 return err; 3913 } 3914 3915 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) 3916 { 3917 struct pktgen_thread *t; 3918 struct proc_dir_entry *pe; 3919 struct task_struct *p; 3920 3921 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3922 cpu_to_node(cpu)); 3923 if (!t) { 3924 pr_err("ERROR: out of memory, can't create new thread\n"); 3925 return -ENOMEM; 3926 } 3927 3928 mutex_init(&t->if_lock); 3929 t->cpu = cpu; 3930 3931 INIT_LIST_HEAD(&t->if_list); 3932 3933 list_add_tail(&t->th_list, &pn->pktgen_threads); 3934 init_completion(&t->start_done); 3935 3936 p = kthread_create_on_cpu(pktgen_thread_worker, t, cpu, "kpktgend_%d"); 3937 if (IS_ERR(p)) { 3938 pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu); 3939 list_del(&t->th_list); 3940 kfree(t); 3941 return PTR_ERR(p); 3942 } 3943 3944 t->tsk = p; 3945 3946 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, 3947 &pktgen_thread_proc_ops, t); 3948 if (!pe) { 3949 pr_err("cannot create %s/%s procfs entry\n", 3950 PG_PROC_DIR, t->tsk->comm); 3951 kthread_stop(p); 3952 list_del(&t->th_list); 3953 kfree(t); 3954 return -EINVAL; 3955 } 3956 3957 t->net = pn; 3958 get_task_struct(p); 3959 wake_up_process(p); 3960 wait_for_completion(&t->start_done); 3961 3962 return 0; 3963 } 3964 3965 /* 3966 * Removes a device from the thread if_list. 3967 */ 3968 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3969 struct pktgen_dev *pkt_dev) 3970 { 3971 struct list_head *q, *n; 3972 struct pktgen_dev *p; 3973 3974 if_lock(t); 3975 list_for_each_safe(q, n, &t->if_list) { 3976 p = list_entry(q, struct pktgen_dev, list); 3977 if (p == pkt_dev) 3978 list_del_rcu(&p->list); 3979 } 3980 if_unlock(t); 3981 } 3982 3983 static int pktgen_remove_device(struct pktgen_thread *t, 3984 struct pktgen_dev *pkt_dev) 3985 { 3986 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3987 3988 if (pkt_dev->running) { 3989 pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); 3990 pktgen_stop_device(pkt_dev); 3991 } 3992 3993 /* Dis-associate from the interface */ 3994 3995 if (pkt_dev->odev) { 3996 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker); 3997 pkt_dev->odev = NULL; 3998 } 3999 4000 /* Remove proc before if_list entry, because add_device uses 4001 * list to determine if interface already exist, avoid race 4002 * with proc_create_data() 4003 */ 4004 proc_remove(pkt_dev->entry); 4005 4006 /* And update the thread if_list */ 4007 _rem_dev_from_if_list(t, pkt_dev); 4008 4009 #ifdef CONFIG_XFRM 4010 free_SAs(pkt_dev); 4011 #endif 4012 vfree(pkt_dev->flows); 4013 if (pkt_dev->page) 4014 put_page(pkt_dev->page); 4015 kfree_rcu(pkt_dev, rcu); 4016 return 0; 4017 } 4018 4019 static int __net_init pg_net_init(struct net *net) 4020 { 4021 struct pktgen_net *pn = net_generic(net, pg_net_id); 4022 struct proc_dir_entry *pe; 4023 int cpu, ret = 0; 4024 4025 pn->net = net; 4026 INIT_LIST_HEAD(&pn->pktgen_threads); 4027 pn->pktgen_exiting = false; 4028 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); 4029 if (!pn->proc_dir) { 4030 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); 4031 return -ENODEV; 4032 } 4033 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops); 4034 if (pe == NULL) { 4035 pr_err("cannot create %s procfs entry\n", PGCTRL); 4036 ret = -EINVAL; 4037 goto remove; 4038 } 4039 4040 cpus_read_lock(); 4041 for_each_online_cpu(cpu) { 4042 int err; 4043 4044 err = pktgen_create_thread(cpu, pn); 4045 if (err) 4046 pr_warn("Cannot create thread for cpu %d (%d)\n", 4047 cpu, err); 4048 } 4049 cpus_read_unlock(); 4050 4051 if (list_empty(&pn->pktgen_threads)) { 4052 pr_err("Initialization failed for all threads\n"); 4053 ret = -ENODEV; 4054 goto remove_entry; 4055 } 4056 4057 return 0; 4058 4059 remove_entry: 4060 remove_proc_entry(PGCTRL, pn->proc_dir); 4061 remove: 4062 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 4063 return ret; 4064 } 4065 4066 static void __net_exit pg_net_exit(struct net *net) 4067 { 4068 struct pktgen_net *pn = net_generic(net, pg_net_id); 4069 struct pktgen_thread *t; 4070 struct list_head *q, *n; 4071 LIST_HEAD(list); 4072 4073 /* Stop all interfaces & threads */ 4074 pn->pktgen_exiting = true; 4075 4076 mutex_lock(&pktgen_thread_lock); 4077 list_splice_init(&pn->pktgen_threads, &list); 4078 mutex_unlock(&pktgen_thread_lock); 4079 4080 list_for_each_safe(q, n, &list) { 4081 t = list_entry(q, struct pktgen_thread, th_list); 4082 list_del(&t->th_list); 4083 kthread_stop_put(t->tsk); 4084 kfree(t); 4085 } 4086 4087 remove_proc_entry(PGCTRL, pn->proc_dir); 4088 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); 4089 } 4090 4091 static struct pernet_operations pg_net_ops = { 4092 .init = pg_net_init, 4093 .exit = pg_net_exit, 4094 .id = &pg_net_id, 4095 .size = sizeof(struct pktgen_net), 4096 }; 4097 4098 static int __init pg_init(void) 4099 { 4100 int ret = 0; 4101 4102 pr_info("%s", version); 4103 ret = register_pernet_subsys(&pg_net_ops); 4104 if (ret) 4105 return ret; 4106 ret = register_netdevice_notifier(&pktgen_notifier_block); 4107 if (ret) 4108 unregister_pernet_subsys(&pg_net_ops); 4109 4110 return ret; 4111 } 4112 4113 static void __exit pg_cleanup(void) 4114 { 4115 unregister_netdevice_notifier(&pktgen_notifier_block); 4116 unregister_pernet_subsys(&pg_net_ops); 4117 /* Don't need rcu_barrier() due to use of kfree_rcu() */ 4118 } 4119 4120 module_init(pg_init); 4121 module_exit(pg_cleanup); 4122 4123 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 4124 MODULE_DESCRIPTION("Packet Generator tool"); 4125 MODULE_LICENSE("GPL"); 4126 MODULE_VERSION(VERSION); 4127 module_param(pg_count_d, int, 0); 4128 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 4129 module_param(pg_delay_d, int, 0); 4130 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 4131 module_param(pg_clone_skb_d, int, 0); 4132 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 4133 module_param(debug, int, 0); 4134 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 4135