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