linux/net/core/pktgen.c
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   1/*
   2 * Authors:
   3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
   4 *                             Uppsala University and
   5 *                             Swedish University of Agricultural Sciences
   6 *
   7 * Alexey Kuznetsov  <kuznet@ms2.inr.ac.ru>
   8 * Ben Greear <greearb@candelatech.com>
   9 * Jens Låås <jens.laas@data.slu.se>
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License
  13 * as published by the Free Software Foundation; either version
  14 * 2 of the License, or (at your option) any later version.
  15 *
  16 *
  17 * A tool for loading the network with preconfigurated packets.
  18 * The tool is implemented as a linux module.  Parameters are output
  19 * device, delay (to hard_xmit), number of packets, and whether
  20 * to use multiple SKBs or just the same one.
  21 * pktgen uses the installed interface's output routine.
  22 *
  23 * Additional hacking by:
  24 *
  25 * Jens.Laas@data.slu.se
  26 * Improved by ANK. 010120.
  27 * Improved by ANK even more. 010212.
  28 * MAC address typo fixed. 010417 --ro
  29 * Integrated.  020301 --DaveM
  30 * Added multiskb option 020301 --DaveM
  31 * Scaling of results. 020417--sigurdur@linpro.no
  32 * Significant re-work of the module:
  33 *   *  Convert to threaded model to more efficiently be able to transmit
  34 *       and receive on multiple interfaces at once.
  35 *   *  Converted many counters to __u64 to allow longer runs.
  36 *   *  Allow configuration of ranges, like min/max IP address, MACs,
  37 *       and UDP-ports, for both source and destination, and can
  38 *       set to use a random distribution or sequentially walk the range.
  39 *   *  Can now change most values after starting.
  40 *   *  Place 12-byte packet in UDP payload with magic number,
  41 *       sequence number, and timestamp.
  42 *   *  Add receiver code that detects dropped pkts, re-ordered pkts, and
  43 *       latencies (with micro-second) precision.
  44 *   *  Add IOCTL interface to easily get counters & configuration.
  45 *   --Ben Greear <greearb@candelatech.com>
  46 *
  47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
  48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
  49 * as a "fastpath" with a configurable number of clones after alloc's.
  50 * clone_skb=0 means all packets are allocated this also means ranges time
  51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
  52 * clones.
  53 *
  54 * Also moved to /proc/net/pktgen/
  55 * --ro
  56 *
  57 * Sept 10:  Fixed threading/locking.  Lots of bone-headed and more clever
  58 *    mistakes.  Also merged in DaveM's patch in the -pre6 patch.
  59 * --Ben Greear <greearb@candelatech.com>
  60 *
  61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
  62 *
  63 *
  64 * 021124 Finished major redesign and rewrite for new functionality.
  65 * See Documentation/networking/pktgen.txt for how to use this.
  66 *
  67 * The new operation:
  68 * For each CPU one thread/process is created at start. This process checks
  69 * for running devices in the if_list and sends packets until count is 0 it
  70 * also the thread checks the thread->control which is used for inter-process
  71 * communication. controlling process "posts" operations to the threads this
  72 * way. The if_lock should be possible to remove when add/rem_device is merged
  73 * into this too.
  74 *
  75 * By design there should only be *one* "controlling" process. In practice
  76 * multiple write accesses gives unpredictable result. Understood by "write"
  77 * to /proc gives result code thats should be read be the "writer".
  78 * For practical use this should be no problem.
  79 *
  80 * Note when adding devices to a specific CPU there good idea to also assign
  81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
  82 * --ro
  83 *
  84 * Fix refcount off by one if first packet fails, potential null deref,
  85 * memleak 030710- KJP
  86 *
  87 * First "ranges" functionality for ipv6 030726 --ro
  88 *
  89 * Included flow support. 030802 ANK.
  90 *
  91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
  92 *
  93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
  94 * ia64 compilation fix from  Aron Griffis <aron@hp.com> 040604
  95 *
  96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
  97 * <shemminger@osdl.org> 040923
  98 *
  99 * Randy Dunlap fixed u64 printk compiler waring
 100 *
 101 * Remove FCS from BW calculation.  Lennert Buytenhek <buytenh@wantstofly.org>
 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
 103 *
 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
 106 *
 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
 108 * 050103
 109 *
 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
 111 *
 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
 113 *
 114 * Fixed src_mac command to set source mac of packet to value specified in
 115 * command by Adit Ranadive <adit.262@gmail.com>
 116 *
 117 */
 118
 119#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 120
 121#include <linux/sys.h>
 122#include <linux/types.h>
 123#include <linux/module.h>
 124#include <linux/moduleparam.h>
 125#include <linux/kernel.h>
 126#include <linux/mutex.h>
 127#include <linux/sched.h>
 128#include <linux/slab.h>
 129#include <linux/vmalloc.h>
 130#include <linux/unistd.h>
 131#include <linux/string.h>
 132#include <linux/ptrace.h>
 133#include <linux/errno.h>
 134#include <linux/ioport.h>
 135#include <linux/interrupt.h>
 136#include <linux/capability.h>
 137#include <linux/hrtimer.h>
 138#include <linux/freezer.h>
 139#include <linux/delay.h>
 140#include <linux/timer.h>
 141#include <linux/list.h>
 142#include <linux/init.h>
 143#include <linux/skbuff.h>
 144#include <linux/netdevice.h>
 145#include <linux/inet.h>
 146#include <linux/inetdevice.h>
 147#include <linux/rtnetlink.h>
 148#include <linux/if_arp.h>
 149#include <linux/if_vlan.h>
 150#include <linux/in.h>
 151#include <linux/ip.h>
 152#include <linux/ipv6.h>
 153#include <linux/udp.h>
 154#include <linux/proc_fs.h>
 155#include <linux/seq_file.h>
 156#include <linux/wait.h>
 157#include <linux/etherdevice.h>
 158#include <linux/kthread.h>
 159#include <linux/prefetch.h>
 160#include <net/net_namespace.h>
 161#include <net/checksum.h>
 162#include <net/ipv6.h>
 163#include <net/addrconf.h>
 164#ifdef CONFIG_XFRM
 165#include <net/xfrm.h>
 166#endif
 167#include <asm/byteorder.h>
 168#include <linux/rcupdate.h>
 169#include <linux/bitops.h>
 170#include <linux/io.h>
 171#include <linux/timex.h>
 172#include <linux/uaccess.h>
 173#include <asm/dma.h>
 174#include <asm/div64.h>          /* do_div */
 175
 176#define VERSION "2.74"
 177#define IP_NAME_SZ 32
 178#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
 179#define MPLS_STACK_BOTTOM htonl(0x00000100)
 180
 181#define func_enter() pr_debug("entering %s\n", __func__);
 182
 183/* Device flag bits */
 184#define F_IPSRC_RND   (1<<0)    /* IP-Src Random  */
 185#define F_IPDST_RND   (1<<1)    /* IP-Dst Random  */
 186#define F_UDPSRC_RND  (1<<2)    /* UDP-Src Random */
 187#define F_UDPDST_RND  (1<<3)    /* UDP-Dst Random */
 188#define F_MACSRC_RND  (1<<4)    /* MAC-Src Random */
 189#define F_MACDST_RND  (1<<5)    /* MAC-Dst Random */
 190#define F_TXSIZE_RND  (1<<6)    /* Transmit size is random */
 191#define F_IPV6        (1<<7)    /* Interface in IPV6 Mode */
 192#define F_MPLS_RND    (1<<8)    /* Random MPLS labels */
 193#define F_VID_RND     (1<<9)    /* Random VLAN ID */
 194#define F_SVID_RND    (1<<10)   /* Random SVLAN ID */
 195#define F_FLOW_SEQ    (1<<11)   /* Sequential flows */
 196#define F_IPSEC_ON    (1<<12)   /* ipsec on for flows */
 197#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
 198#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
 199#define F_NODE          (1<<15) /* Node memory alloc*/
 200
 201/* Thread control flag bits */
 202#define T_STOP        (1<<0)    /* Stop run */
 203#define T_RUN         (1<<1)    /* Start run */
 204#define T_REMDEVALL   (1<<2)    /* Remove all devs */
 205#define T_REMDEV      (1<<3)    /* Remove one dev */
 206
 207/* If lock -- can be removed after some work */
 208#define   if_lock(t)           spin_lock(&(t->if_lock));
 209#define   if_unlock(t)           spin_unlock(&(t->if_lock));
 210
 211/* Used to help with determining the pkts on receive */
 212#define PKTGEN_MAGIC 0xbe9be955
 213#define PG_PROC_DIR "pktgen"
 214#define PGCTRL      "pgctrl"
 215static struct proc_dir_entry *pg_proc_dir;
 216
 217#define MAX_CFLOWS  65536
 218
 219#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
 220#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
 221
 222struct flow_state {
 223        __be32 cur_daddr;
 224        int count;
 225#ifdef CONFIG_XFRM
 226        struct xfrm_state *x;
 227#endif
 228        __u32 flags;
 229};
 230
 231/* flow flag bits */
 232#define F_INIT   (1<<0)         /* flow has been initialized */
 233
 234struct pktgen_dev {
 235        /*
 236         * Try to keep frequent/infrequent used vars. separated.
 237         */
 238        struct proc_dir_entry *entry;   /* proc file */
 239        struct pktgen_thread *pg_thread;/* the owner */
 240        struct list_head list;          /* chaining in the thread's run-queue */
 241
 242        int running;            /* if false, the test will stop */
 243
 244        /* If min != max, then we will either do a linear iteration, or
 245         * we will do a random selection from within the range.
 246         */
 247        __u32 flags;
 248        int removal_mark;       /* non-zero => the device is marked for
 249                                 * removal by worker thread */
 250
 251        int min_pkt_size;
 252        int max_pkt_size;
 253        int pkt_overhead;       /* overhead for MPLS, VLANs, IPSEC etc */
 254        int nfrags;
 255        struct page *page;
 256        u64 delay;              /* nano-seconds */
 257
 258        __u64 count;            /* Default No packets to send */
 259        __u64 sofar;            /* How many pkts we've sent so far */
 260        __u64 tx_bytes;         /* How many bytes we've transmitted */
 261        __u64 errors;           /* Errors when trying to transmit, */
 262
 263        /* runtime counters relating to clone_skb */
 264
 265        __u64 allocated_skbs;
 266        __u32 clone_count;
 267        int last_ok;            /* Was last skb sent?
 268                                 * Or a failed transmit of some sort?
 269                                 * This will keep sequence numbers in order
 270                                 */
 271        ktime_t next_tx;
 272        ktime_t started_at;
 273        ktime_t stopped_at;
 274        u64     idle_acc;       /* nano-seconds */
 275
 276        __u32 seq_num;
 277
 278        int clone_skb;          /*
 279                                 * Use multiple SKBs during packet gen.
 280                                 * If this number is greater than 1, then
 281                                 * that many copies of the same packet will be
 282                                 * sent before a new packet is allocated.
 283                                 * If you want to send 1024 identical packets
 284                                 * before creating a new packet,
 285                                 * set clone_skb to 1024.
 286                                 */
 287
 288        char dst_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 289        char dst_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 290        char src_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 291        char src_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 292
 293        struct in6_addr in6_saddr;
 294        struct in6_addr in6_daddr;
 295        struct in6_addr cur_in6_daddr;
 296        struct in6_addr cur_in6_saddr;
 297        /* For ranges */
 298        struct in6_addr min_in6_daddr;
 299        struct in6_addr max_in6_daddr;
 300        struct in6_addr min_in6_saddr;
 301        struct in6_addr max_in6_saddr;
 302
 303        /* If we're doing ranges, random or incremental, then this
 304         * defines the min/max for those ranges.
 305         */
 306        __be32 saddr_min;       /* inclusive, source IP address */
 307        __be32 saddr_max;       /* exclusive, source IP address */
 308        __be32 daddr_min;       /* inclusive, dest IP address */
 309        __be32 daddr_max;       /* exclusive, dest IP address */
 310
 311        __u16 udp_src_min;      /* inclusive, source UDP port */
 312        __u16 udp_src_max;      /* exclusive, source UDP port */
 313        __u16 udp_dst_min;      /* inclusive, dest UDP port */
 314        __u16 udp_dst_max;      /* exclusive, dest UDP port */
 315
 316        /* DSCP + ECN */
 317        __u8 tos;            /* six MSB of (former) IPv4 TOS
 318                                are for dscp codepoint */
 319        __u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6
 320                                (see RFC 3260, sec. 4) */
 321
 322        /* MPLS */
 323        unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
 324        __be32 labels[MAX_MPLS_LABELS];
 325
 326        /* VLAN/SVLAN (802.1Q/Q-in-Q) */
 327        __u8  vlan_p;
 328        __u8  vlan_cfi;
 329        __u16 vlan_id;  /* 0xffff means no vlan tag */
 330
 331        __u8  svlan_p;
 332        __u8  svlan_cfi;
 333        __u16 svlan_id; /* 0xffff means no svlan tag */
 334
 335        __u32 src_mac_count;    /* How many MACs to iterate through */
 336        __u32 dst_mac_count;    /* How many MACs to iterate through */
 337
 338        unsigned char dst_mac[ETH_ALEN];
 339        unsigned char src_mac[ETH_ALEN];
 340
 341        __u32 cur_dst_mac_offset;
 342        __u32 cur_src_mac_offset;
 343        __be32 cur_saddr;
 344        __be32 cur_daddr;
 345        __u16 ip_id;
 346        __u16 cur_udp_dst;
 347        __u16 cur_udp_src;
 348        __u16 cur_queue_map;
 349        __u32 cur_pkt_size;
 350        __u32 last_pkt_size;
 351
 352        __u8 hh[14];
 353        /* = {
 354           0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
 355
 356           We fill in SRC address later
 357           0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 358           0x08, 0x00
 359           };
 360         */
 361        __u16 pad;              /* pad out the hh struct to an even 16 bytes */
 362
 363        struct sk_buff *skb;    /* skb we are to transmit next, used for when we
 364                                 * are transmitting the same one multiple times
 365                                 */
 366        struct net_device *odev; /* The out-going device.
 367                                  * Note that the device should have it's
 368                                  * pg_info pointer pointing back to this
 369                                  * device.
 370                                  * Set when the user specifies the out-going
 371                                  * device name (not when the inject is
 372                                  * started as it used to do.)
 373                                  */
 374        char odevname[32];
 375        struct flow_state *flows;
 376        unsigned int cflows;    /* Concurrent flows (config) */
 377        unsigned int lflow;             /* Flow length  (config) */
 378        unsigned int nflows;    /* accumulated flows (stats) */
 379        unsigned int curfl;             /* current sequenced flow (state)*/
 380
 381        u16 queue_map_min;
 382        u16 queue_map_max;
 383        __u32 skb_priority;     /* skb priority field */
 384        int node;               /* Memory node */
 385
 386#ifdef CONFIG_XFRM
 387        __u8    ipsmode;                /* IPSEC mode (config) */
 388        __u8    ipsproto;               /* IPSEC type (config) */
 389#endif
 390        char result[512];
 391};
 392
 393struct pktgen_hdr {
 394        __be32 pgh_magic;
 395        __be32 seq_num;
 396        __be32 tv_sec;
 397        __be32 tv_usec;
 398};
 399
 400static bool pktgen_exiting __read_mostly;
 401
 402struct pktgen_thread {
 403        spinlock_t if_lock;             /* for list of devices */
 404        struct list_head if_list;       /* All device here */
 405        struct list_head th_list;
 406        struct task_struct *tsk;
 407        char result[512];
 408
 409        /* Field for thread to receive "posted" events terminate,
 410           stop ifs etc. */
 411
 412        u32 control;
 413        int cpu;
 414
 415        wait_queue_head_t queue;
 416        struct completion start_done;
 417};
 418
 419#define REMOVE 1
 420#define FIND   0
 421
 422static inline ktime_t ktime_now(void)
 423{
 424        struct timespec ts;
 425        ktime_get_ts(&ts);
 426
 427        return timespec_to_ktime(ts);
 428}
 429
 430/* This works even if 32 bit because of careful byte order choice */
 431static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
 432{
 433        return cmp1.tv64 < cmp2.tv64;
 434}
 435
 436static const char version[] =
 437        "Packet Generator for packet performance testing. "
 438        "Version: " VERSION "\n";
 439
 440static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
 441static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
 442static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
 443                                          const char *ifname, bool exact);
 444static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
 445static void pktgen_run_all_threads(void);
 446static void pktgen_reset_all_threads(void);
 447static void pktgen_stop_all_threads_ifs(void);
 448
 449static void pktgen_stop(struct pktgen_thread *t);
 450static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
 451
 452/* Module parameters, defaults. */
 453static int pg_count_d __read_mostly = 1000;
 454static int pg_delay_d __read_mostly;
 455static int pg_clone_skb_d  __read_mostly;
 456static int debug  __read_mostly;
 457
 458static DEFINE_MUTEX(pktgen_thread_lock);
 459static LIST_HEAD(pktgen_threads);
 460
 461static struct notifier_block pktgen_notifier_block = {
 462        .notifier_call = pktgen_device_event,
 463};
 464
 465/*
 466 * /proc handling functions
 467 *
 468 */
 469
 470static int pgctrl_show(struct seq_file *seq, void *v)
 471{
 472        seq_puts(seq, version);
 473        return 0;
 474}
 475
 476static ssize_t pgctrl_write(struct file *file, const char __user *buf,
 477                            size_t count, loff_t *ppos)
 478{
 479        int err = 0;
 480        char data[128];
 481
 482        if (!capable(CAP_NET_ADMIN)) {
 483                err = -EPERM;
 484                goto out;
 485        }
 486
 487        if (count > sizeof(data))
 488                count = sizeof(data);
 489
 490        if (copy_from_user(data, buf, count)) {
 491                err = -EFAULT;
 492                goto out;
 493        }
 494        data[count - 1] = 0;    /* Make string */
 495
 496        if (!strcmp(data, "stop"))
 497                pktgen_stop_all_threads_ifs();
 498
 499        else if (!strcmp(data, "start"))
 500                pktgen_run_all_threads();
 501
 502        else if (!strcmp(data, "reset"))
 503                pktgen_reset_all_threads();
 504
 505        else
 506                pr_warning("Unknown command: %s\n", data);
 507
 508        err = count;
 509
 510out:
 511        return err;
 512}
 513
 514static int pgctrl_open(struct inode *inode, struct file *file)
 515{
 516        return single_open(file, pgctrl_show, PDE(inode)->data);
 517}
 518
 519static const struct file_operations pktgen_fops = {
 520        .owner   = THIS_MODULE,
 521        .open    = pgctrl_open,
 522        .read    = seq_read,
 523        .llseek  = seq_lseek,
 524        .write   = pgctrl_write,
 525        .release = single_release,
 526};
 527
 528static int pktgen_if_show(struct seq_file *seq, void *v)
 529{
 530        const struct pktgen_dev *pkt_dev = seq->private;
 531        ktime_t stopped;
 532        u64 idle;
 533
 534        seq_printf(seq,
 535                   "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
 536                   (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
 537                   pkt_dev->max_pkt_size);
 538
 539        seq_printf(seq,
 540                   "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
 541                   pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
 542                   pkt_dev->clone_skb, pkt_dev->odevname);
 543
 544        seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
 545                   pkt_dev->lflow);
 546
 547        seq_printf(seq,
 548                   "     queue_map_min: %u  queue_map_max: %u\n",
 549                   pkt_dev->queue_map_min,
 550                   pkt_dev->queue_map_max);
 551
 552        if (pkt_dev->skb_priority)
 553                seq_printf(seq, "     skb_priority: %u\n",
 554                           pkt_dev->skb_priority);
 555
 556        if (pkt_dev->flags & F_IPV6) {
 557                seq_printf(seq,
 558                           "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
 559                           "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
 560                           &pkt_dev->in6_saddr,
 561                           &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
 562                           &pkt_dev->in6_daddr,
 563                           &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
 564        } else {
 565                seq_printf(seq,
 566                           "     dst_min: %s  dst_max: %s\n",
 567                           pkt_dev->dst_min, pkt_dev->dst_max);
 568                seq_printf(seq,
 569                           "        src_min: %s  src_max: %s\n",
 570                           pkt_dev->src_min, pkt_dev->src_max);
 571        }
 572
 573        seq_puts(seq, "     src_mac: ");
 574
 575        seq_printf(seq, "%pM ",
 576                   is_zero_ether_addr(pkt_dev->src_mac) ?
 577                             pkt_dev->odev->dev_addr : pkt_dev->src_mac);
 578
 579        seq_printf(seq, "dst_mac: ");
 580        seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
 581
 582        seq_printf(seq,
 583                   "     udp_src_min: %d  udp_src_max: %d"
 584                   "  udp_dst_min: %d  udp_dst_max: %d\n",
 585                   pkt_dev->udp_src_min, pkt_dev->udp_src_max,
 586                   pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
 587
 588        seq_printf(seq,
 589                   "     src_mac_count: %d  dst_mac_count: %d\n",
 590                   pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
 591
 592        if (pkt_dev->nr_labels) {
 593                unsigned int i;
 594                seq_printf(seq, "     mpls: ");
 595                for (i = 0; i < pkt_dev->nr_labels; i++)
 596                        seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
 597                                   i == pkt_dev->nr_labels-1 ? "\n" : ", ");
 598        }
 599
 600        if (pkt_dev->vlan_id != 0xffff)
 601                seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 602                           pkt_dev->vlan_id, pkt_dev->vlan_p,
 603                           pkt_dev->vlan_cfi);
 604
 605        if (pkt_dev->svlan_id != 0xffff)
 606                seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 607                           pkt_dev->svlan_id, pkt_dev->svlan_p,
 608                           pkt_dev->svlan_cfi);
 609
 610        if (pkt_dev->tos)
 611                seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
 612
 613        if (pkt_dev->traffic_class)
 614                seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
 615
 616        if (pkt_dev->node >= 0)
 617                seq_printf(seq, "     node: %d\n", pkt_dev->node);
 618
 619        seq_printf(seq, "     Flags: ");
 620
 621        if (pkt_dev->flags & F_IPV6)
 622                seq_printf(seq, "IPV6  ");
 623
 624        if (pkt_dev->flags & F_IPSRC_RND)
 625                seq_printf(seq, "IPSRC_RND  ");
 626
 627        if (pkt_dev->flags & F_IPDST_RND)
 628                seq_printf(seq, "IPDST_RND  ");
 629
 630        if (pkt_dev->flags & F_TXSIZE_RND)
 631                seq_printf(seq, "TXSIZE_RND  ");
 632
 633        if (pkt_dev->flags & F_UDPSRC_RND)
 634                seq_printf(seq, "UDPSRC_RND  ");
 635
 636        if (pkt_dev->flags & F_UDPDST_RND)
 637                seq_printf(seq, "UDPDST_RND  ");
 638
 639        if (pkt_dev->flags & F_MPLS_RND)
 640                seq_printf(seq,  "MPLS_RND  ");
 641
 642        if (pkt_dev->flags & F_QUEUE_MAP_RND)
 643                seq_printf(seq,  "QUEUE_MAP_RND  ");
 644
 645        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
 646                seq_printf(seq,  "QUEUE_MAP_CPU  ");
 647
 648        if (pkt_dev->cflows) {
 649                if (pkt_dev->flags & F_FLOW_SEQ)
 650                        seq_printf(seq,  "FLOW_SEQ  "); /*in sequence flows*/
 651                else
 652                        seq_printf(seq,  "FLOW_RND  ");
 653        }
 654
 655#ifdef CONFIG_XFRM
 656        if (pkt_dev->flags & F_IPSEC_ON)
 657                seq_printf(seq,  "IPSEC  ");
 658#endif
 659
 660        if (pkt_dev->flags & F_MACSRC_RND)
 661                seq_printf(seq, "MACSRC_RND  ");
 662
 663        if (pkt_dev->flags & F_MACDST_RND)
 664                seq_printf(seq, "MACDST_RND  ");
 665
 666        if (pkt_dev->flags & F_VID_RND)
 667                seq_printf(seq, "VID_RND  ");
 668
 669        if (pkt_dev->flags & F_SVID_RND)
 670                seq_printf(seq, "SVID_RND  ");
 671
 672        if (pkt_dev->flags & F_NODE)
 673                seq_printf(seq, "NODE_ALLOC  ");
 674
 675        seq_puts(seq, "\n");
 676
 677        /* not really stopped, more like last-running-at */
 678        stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
 679        idle = pkt_dev->idle_acc;
 680        do_div(idle, NSEC_PER_USEC);
 681
 682        seq_printf(seq,
 683                   "Current:\n     pkts-sofar: %llu  errors: %llu\n",
 684                   (unsigned long long)pkt_dev->sofar,
 685                   (unsigned long long)pkt_dev->errors);
 686
 687        seq_printf(seq,
 688                   "     started: %lluus  stopped: %lluus idle: %lluus\n",
 689                   (unsigned long long) ktime_to_us(pkt_dev->started_at),
 690                   (unsigned long long) ktime_to_us(stopped),
 691                   (unsigned long long) idle);
 692
 693        seq_printf(seq,
 694                   "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
 695                   pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
 696                   pkt_dev->cur_src_mac_offset);
 697
 698        if (pkt_dev->flags & F_IPV6) {
 699                seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
 700                                &pkt_dev->cur_in6_saddr,
 701                                &pkt_dev->cur_in6_daddr);
 702        } else
 703                seq_printf(seq, "     cur_saddr: %pI4  cur_daddr: %pI4\n",
 704                           &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
 705
 706        seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
 707                   pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
 708
 709        seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
 710
 711        seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
 712
 713        if (pkt_dev->result[0])
 714                seq_printf(seq, "Result: %s\n", pkt_dev->result);
 715        else
 716                seq_printf(seq, "Result: Idle\n");
 717
 718        return 0;
 719}
 720
 721
 722static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
 723                     __u32 *num)
 724{
 725        int i = 0;
 726        *num = 0;
 727
 728        for (; i < maxlen; i++) {
 729                int value;
 730                char c;
 731                *num <<= 4;
 732                if (get_user(c, &user_buffer[i]))
 733                        return -EFAULT;
 734                value = hex_to_bin(c);
 735                if (value >= 0)
 736                        *num |= value;
 737                else
 738                        break;
 739        }
 740        return i;
 741}
 742
 743static int count_trail_chars(const char __user * user_buffer,
 744                             unsigned int maxlen)
 745{
 746        int i;
 747
 748        for (i = 0; i < maxlen; i++) {
 749                char c;
 750                if (get_user(c, &user_buffer[i]))
 751                        return -EFAULT;
 752                switch (c) {
 753                case '\"':
 754                case '\n':
 755                case '\r':
 756                case '\t':
 757                case ' ':
 758                case '=':
 759                        break;
 760                default:
 761                        goto done;
 762                }
 763        }
 764done:
 765        return i;
 766}
 767
 768static long num_arg(const char __user *user_buffer, unsigned long maxlen,
 769                                unsigned long *num)
 770{
 771        int i;
 772        *num = 0;
 773
 774        for (i = 0; i < maxlen; i++) {
 775                char c;
 776                if (get_user(c, &user_buffer[i]))
 777                        return -EFAULT;
 778                if ((c >= '0') && (c <= '9')) {
 779                        *num *= 10;
 780                        *num += c - '0';
 781                } else
 782                        break;
 783        }
 784        return i;
 785}
 786
 787static int strn_len(const char __user * user_buffer, unsigned int maxlen)
 788{
 789        int i;
 790
 791        for (i = 0; i < maxlen; i++) {
 792                char c;
 793                if (get_user(c, &user_buffer[i]))
 794                        return -EFAULT;
 795                switch (c) {
 796                case '\"':
 797                case '\n':
 798                case '\r':
 799                case '\t':
 800                case ' ':
 801                        goto done_str;
 802                        break;
 803                default:
 804                        break;
 805                }
 806        }
 807done_str:
 808        return i;
 809}
 810
 811static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
 812{
 813        unsigned int n = 0;
 814        char c;
 815        ssize_t i = 0;
 816        int len;
 817
 818        pkt_dev->nr_labels = 0;
 819        do {
 820                __u32 tmp;
 821                len = hex32_arg(&buffer[i], 8, &tmp);
 822                if (len <= 0)
 823                        return len;
 824                pkt_dev->labels[n] = htonl(tmp);
 825                if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
 826                        pkt_dev->flags |= F_MPLS_RND;
 827                i += len;
 828                if (get_user(c, &buffer[i]))
 829                        return -EFAULT;
 830                i++;
 831                n++;
 832                if (n >= MAX_MPLS_LABELS)
 833                        return -E2BIG;
 834        } while (c == ',');
 835
 836        pkt_dev->nr_labels = n;
 837        return i;
 838}
 839
 840static ssize_t pktgen_if_write(struct file *file,
 841                               const char __user * user_buffer, size_t count,
 842                               loff_t * offset)
 843{
 844        struct seq_file *seq = file->private_data;
 845        struct pktgen_dev *pkt_dev = seq->private;
 846        int i, max, len;
 847        char name[16], valstr[32];
 848        unsigned long value = 0;
 849        char *pg_result = NULL;
 850        int tmp = 0;
 851        char buf[128];
 852
 853        pg_result = &(pkt_dev->result[0]);
 854
 855        if (count < 1) {
 856                pr_warning("wrong command format\n");
 857                return -EINVAL;
 858        }
 859
 860        max = count;
 861        tmp = count_trail_chars(user_buffer, max);
 862        if (tmp < 0) {
 863                pr_warning("illegal format\n");
 864                return tmp;
 865        }
 866        i = tmp;
 867
 868        /* Read variable name */
 869
 870        len = strn_len(&user_buffer[i], sizeof(name) - 1);
 871        if (len < 0)
 872                return len;
 873
 874        memset(name, 0, sizeof(name));
 875        if (copy_from_user(name, &user_buffer[i], len))
 876                return -EFAULT;
 877        i += len;
 878
 879        max = count - i;
 880        len = count_trail_chars(&user_buffer[i], max);
 881        if (len < 0)
 882                return len;
 883
 884        i += len;
 885
 886        if (debug) {
 887                size_t copy = min_t(size_t, count, 1023);
 888                char tb[copy + 1];
 889                if (copy_from_user(tb, user_buffer, copy))
 890                        return -EFAULT;
 891                tb[copy] = 0;
 892                pr_debug("%s,%lu  buffer -:%s:-\n",
 893                         name, (unsigned long)count, tb);
 894        }
 895
 896        if (!strcmp(name, "min_pkt_size")) {
 897                len = num_arg(&user_buffer[i], 10, &value);
 898                if (len < 0)
 899                        return len;
 900
 901                i += len;
 902                if (value < 14 + 20 + 8)
 903                        value = 14 + 20 + 8;
 904                if (value != pkt_dev->min_pkt_size) {
 905                        pkt_dev->min_pkt_size = value;
 906                        pkt_dev->cur_pkt_size = value;
 907                }
 908                sprintf(pg_result, "OK: min_pkt_size=%u",
 909                        pkt_dev->min_pkt_size);
 910                return count;
 911        }
 912
 913        if (!strcmp(name, "max_pkt_size")) {
 914                len = num_arg(&user_buffer[i], 10, &value);
 915                if (len < 0)
 916                        return len;
 917
 918                i += len;
 919                if (value < 14 + 20 + 8)
 920                        value = 14 + 20 + 8;
 921                if (value != pkt_dev->max_pkt_size) {
 922                        pkt_dev->max_pkt_size = value;
 923                        pkt_dev->cur_pkt_size = value;
 924                }
 925                sprintf(pg_result, "OK: max_pkt_size=%u",
 926                        pkt_dev->max_pkt_size);
 927                return count;
 928        }
 929
 930        /* Shortcut for min = max */
 931
 932        if (!strcmp(name, "pkt_size")) {
 933                len = num_arg(&user_buffer[i], 10, &value);
 934                if (len < 0)
 935                        return len;
 936
 937                i += len;
 938                if (value < 14 + 20 + 8)
 939                        value = 14 + 20 + 8;
 940                if (value != pkt_dev->min_pkt_size) {
 941                        pkt_dev->min_pkt_size = value;
 942                        pkt_dev->max_pkt_size = value;
 943                        pkt_dev->cur_pkt_size = value;
 944                }
 945                sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
 946                return count;
 947        }
 948
 949        if (!strcmp(name, "debug")) {
 950                len = num_arg(&user_buffer[i], 10, &value);
 951                if (len < 0)
 952                        return len;
 953
 954                i += len;
 955                debug = value;
 956                sprintf(pg_result, "OK: debug=%u", debug);
 957                return count;
 958        }
 959
 960        if (!strcmp(name, "frags")) {
 961                len = num_arg(&user_buffer[i], 10, &value);
 962                if (len < 0)
 963                        return len;
 964
 965                i += len;
 966                pkt_dev->nfrags = value;
 967                sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
 968                return count;
 969        }
 970        if (!strcmp(name, "delay")) {
 971                len = num_arg(&user_buffer[i], 10, &value);
 972                if (len < 0)
 973                        return len;
 974
 975                i += len;
 976                if (value == 0x7FFFFFFF)
 977                        pkt_dev->delay = ULLONG_MAX;
 978                else
 979                        pkt_dev->delay = (u64)value;
 980
 981                sprintf(pg_result, "OK: delay=%llu",
 982                        (unsigned long long) pkt_dev->delay);
 983                return count;
 984        }
 985        if (!strcmp(name, "rate")) {
 986                len = num_arg(&user_buffer[i], 10, &value);
 987                if (len < 0)
 988                        return len;
 989
 990                i += len;
 991                if (!value)
 992                        return len;
 993                pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
 994                if (debug)
 995                        pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
 996
 997                sprintf(pg_result, "OK: rate=%lu", value);
 998                return count;
 999        }
1000        if (!strcmp(name, "ratep")) {
1001                len = num_arg(&user_buffer[i], 10, &value);
1002                if (len < 0)
1003                        return len;
1004
1005                i += len;
1006                if (!value)
1007                        return len;
1008                pkt_dev->delay = NSEC_PER_SEC/value;
1009                if (debug)
1010                        pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1011
1012                sprintf(pg_result, "OK: rate=%lu", value);
1013                return count;
1014        }
1015        if (!strcmp(name, "udp_src_min")) {
1016                len = num_arg(&user_buffer[i], 10, &value);
1017                if (len < 0)
1018                        return len;
1019
1020                i += len;
1021                if (value != pkt_dev->udp_src_min) {
1022                        pkt_dev->udp_src_min = value;
1023                        pkt_dev->cur_udp_src = value;
1024                }
1025                sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1026                return count;
1027        }
1028        if (!strcmp(name, "udp_dst_min")) {
1029                len = num_arg(&user_buffer[i], 10, &value);
1030                if (len < 0)
1031                        return len;
1032
1033                i += len;
1034                if (value != pkt_dev->udp_dst_min) {
1035                        pkt_dev->udp_dst_min = value;
1036                        pkt_dev->cur_udp_dst = value;
1037                }
1038                sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1039                return count;
1040        }
1041        if (!strcmp(name, "udp_src_max")) {
1042                len = num_arg(&user_buffer[i], 10, &value);
1043                if (len < 0)
1044                        return len;
1045
1046                i += len;
1047                if (value != pkt_dev->udp_src_max) {
1048                        pkt_dev->udp_src_max = value;
1049                        pkt_dev->cur_udp_src = value;
1050                }
1051                sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1052                return count;
1053        }
1054        if (!strcmp(name, "udp_dst_max")) {
1055                len = num_arg(&user_buffer[i], 10, &value);
1056                if (len < 0)
1057                        return len;
1058
1059                i += len;
1060                if (value != pkt_dev->udp_dst_max) {
1061                        pkt_dev->udp_dst_max = value;
1062                        pkt_dev->cur_udp_dst = value;
1063                }
1064                sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1065                return count;
1066        }
1067        if (!strcmp(name, "clone_skb")) {
1068                len = num_arg(&user_buffer[i], 10, &value);
1069                if (len < 0)
1070                        return len;
1071                if ((value > 0) &&
1072                    (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1073                        return -ENOTSUPP;
1074                i += len;
1075                pkt_dev->clone_skb = value;
1076
1077                sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1078                return count;
1079        }
1080        if (!strcmp(name, "count")) {
1081                len = num_arg(&user_buffer[i], 10, &value);
1082                if (len < 0)
1083                        return len;
1084
1085                i += len;
1086                pkt_dev->count = value;
1087                sprintf(pg_result, "OK: count=%llu",
1088                        (unsigned long long)pkt_dev->count);
1089                return count;
1090        }
1091        if (!strcmp(name, "src_mac_count")) {
1092                len = num_arg(&user_buffer[i], 10, &value);
1093                if (len < 0)
1094                        return len;
1095
1096                i += len;
1097                if (pkt_dev->src_mac_count != value) {
1098                        pkt_dev->src_mac_count = value;
1099                        pkt_dev->cur_src_mac_offset = 0;
1100                }
1101                sprintf(pg_result, "OK: src_mac_count=%d",
1102                        pkt_dev->src_mac_count);
1103                return count;
1104        }
1105        if (!strcmp(name, "dst_mac_count")) {
1106                len = num_arg(&user_buffer[i], 10, &value);
1107                if (len < 0)
1108                        return len;
1109
1110                i += len;
1111                if (pkt_dev->dst_mac_count != value) {
1112                        pkt_dev->dst_mac_count = value;
1113                        pkt_dev->cur_dst_mac_offset = 0;
1114                }
1115                sprintf(pg_result, "OK: dst_mac_count=%d",
1116                        pkt_dev->dst_mac_count);
1117                return count;
1118        }
1119        if (!strcmp(name, "node")) {
1120                len = num_arg(&user_buffer[i], 10, &value);
1121                if (len < 0)
1122                        return len;
1123
1124                i += len;
1125
1126                if (node_possible(value)) {
1127                        pkt_dev->node = value;
1128                        sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1129                        if (pkt_dev->page) {
1130                                put_page(pkt_dev->page);
1131                                pkt_dev->page = NULL;
1132                        }
1133                }
1134                else
1135                        sprintf(pg_result, "ERROR: node not possible");
1136                return count;
1137        }
1138        if (!strcmp(name, "flag")) {
1139                char f[32];
1140                memset(f, 0, 32);
1141                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1142                if (len < 0)
1143                        return len;
1144
1145                if (copy_from_user(f, &user_buffer[i], len))
1146                        return -EFAULT;
1147                i += len;
1148                if (strcmp(f, "IPSRC_RND") == 0)
1149                        pkt_dev->flags |= F_IPSRC_RND;
1150
1151                else if (strcmp(f, "!IPSRC_RND") == 0)
1152                        pkt_dev->flags &= ~F_IPSRC_RND;
1153
1154                else if (strcmp(f, "TXSIZE_RND") == 0)
1155                        pkt_dev->flags |= F_TXSIZE_RND;
1156
1157                else if (strcmp(f, "!TXSIZE_RND") == 0)
1158                        pkt_dev->flags &= ~F_TXSIZE_RND;
1159
1160                else if (strcmp(f, "IPDST_RND") == 0)
1161                        pkt_dev->flags |= F_IPDST_RND;
1162
1163                else if (strcmp(f, "!IPDST_RND") == 0)
1164                        pkt_dev->flags &= ~F_IPDST_RND;
1165
1166                else if (strcmp(f, "UDPSRC_RND") == 0)
1167                        pkt_dev->flags |= F_UDPSRC_RND;
1168
1169                else if (strcmp(f, "!UDPSRC_RND") == 0)
1170                        pkt_dev->flags &= ~F_UDPSRC_RND;
1171
1172                else if (strcmp(f, "UDPDST_RND") == 0)
1173                        pkt_dev->flags |= F_UDPDST_RND;
1174
1175                else if (strcmp(f, "!UDPDST_RND") == 0)
1176                        pkt_dev->flags &= ~F_UDPDST_RND;
1177
1178                else if (strcmp(f, "MACSRC_RND") == 0)
1179                        pkt_dev->flags |= F_MACSRC_RND;
1180
1181                else if (strcmp(f, "!MACSRC_RND") == 0)
1182                        pkt_dev->flags &= ~F_MACSRC_RND;
1183
1184                else if (strcmp(f, "MACDST_RND") == 0)
1185                        pkt_dev->flags |= F_MACDST_RND;
1186
1187                else if (strcmp(f, "!MACDST_RND") == 0)
1188                        pkt_dev->flags &= ~F_MACDST_RND;
1189
1190                else if (strcmp(f, "MPLS_RND") == 0)
1191                        pkt_dev->flags |= F_MPLS_RND;
1192
1193                else if (strcmp(f, "!MPLS_RND") == 0)
1194                        pkt_dev->flags &= ~F_MPLS_RND;
1195
1196                else if (strcmp(f, "VID_RND") == 0)
1197                        pkt_dev->flags |= F_VID_RND;
1198
1199                else if (strcmp(f, "!VID_RND") == 0)
1200                        pkt_dev->flags &= ~F_VID_RND;
1201
1202                else if (strcmp(f, "SVID_RND") == 0)
1203                        pkt_dev->flags |= F_SVID_RND;
1204
1205                else if (strcmp(f, "!SVID_RND") == 0)
1206                        pkt_dev->flags &= ~F_SVID_RND;
1207
1208                else if (strcmp(f, "FLOW_SEQ") == 0)
1209                        pkt_dev->flags |= F_FLOW_SEQ;
1210
1211                else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1212                        pkt_dev->flags |= F_QUEUE_MAP_RND;
1213
1214                else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1215                        pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1216
1217                else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1218                        pkt_dev->flags |= F_QUEUE_MAP_CPU;
1219
1220                else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1221                        pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1222#ifdef CONFIG_XFRM
1223                else if (strcmp(f, "IPSEC") == 0)
1224                        pkt_dev->flags |= F_IPSEC_ON;
1225#endif
1226
1227                else if (strcmp(f, "!IPV6") == 0)
1228                        pkt_dev->flags &= ~F_IPV6;
1229
1230                else if (strcmp(f, "NODE_ALLOC") == 0)
1231                        pkt_dev->flags |= F_NODE;
1232
1233                else if (strcmp(f, "!NODE_ALLOC") == 0)
1234                        pkt_dev->flags &= ~F_NODE;
1235
1236                else {
1237                        sprintf(pg_result,
1238                                "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1239                                f,
1240                                "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1241                                "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1242                        return count;
1243                }
1244                sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1245                return count;
1246        }
1247        if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1248                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1249                if (len < 0)
1250                        return len;
1251
1252                if (copy_from_user(buf, &user_buffer[i], len))
1253                        return -EFAULT;
1254                buf[len] = 0;
1255                if (strcmp(buf, pkt_dev->dst_min) != 0) {
1256                        memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1257                        strncpy(pkt_dev->dst_min, buf, len);
1258                        pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1259                        pkt_dev->cur_daddr = pkt_dev->daddr_min;
1260                }
1261                if (debug)
1262                        pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1263                i += len;
1264                sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1265                return count;
1266        }
1267        if (!strcmp(name, "dst_max")) {
1268                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1269                if (len < 0)
1270                        return len;
1271
1272
1273                if (copy_from_user(buf, &user_buffer[i], len))
1274                        return -EFAULT;
1275
1276                buf[len] = 0;
1277                if (strcmp(buf, pkt_dev->dst_max) != 0) {
1278                        memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1279                        strncpy(pkt_dev->dst_max, buf, len);
1280                        pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1281                        pkt_dev->cur_daddr = pkt_dev->daddr_max;
1282                }
1283                if (debug)
1284                        pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1285                i += len;
1286                sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1287                return count;
1288        }
1289        if (!strcmp(name, "dst6")) {
1290                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1291                if (len < 0)
1292                        return len;
1293
1294                pkt_dev->flags |= F_IPV6;
1295
1296                if (copy_from_user(buf, &user_buffer[i], len))
1297                        return -EFAULT;
1298                buf[len] = 0;
1299
1300                in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1301                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1302
1303                pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1304
1305                if (debug)
1306                        pr_debug("dst6 set to: %s\n", buf);
1307
1308                i += len;
1309                sprintf(pg_result, "OK: dst6=%s", buf);
1310                return count;
1311        }
1312        if (!strcmp(name, "dst6_min")) {
1313                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1314                if (len < 0)
1315                        return len;
1316
1317                pkt_dev->flags |= F_IPV6;
1318
1319                if (copy_from_user(buf, &user_buffer[i], len))
1320                        return -EFAULT;
1321                buf[len] = 0;
1322
1323                in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1324                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1325
1326                pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1327                if (debug)
1328                        pr_debug("dst6_min set to: %s\n", buf);
1329
1330                i += len;
1331                sprintf(pg_result, "OK: dst6_min=%s", buf);
1332                return count;
1333        }
1334        if (!strcmp(name, "dst6_max")) {
1335                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1336                if (len < 0)
1337                        return len;
1338
1339                pkt_dev->flags |= F_IPV6;
1340
1341                if (copy_from_user(buf, &user_buffer[i], len))
1342                        return -EFAULT;
1343                buf[len] = 0;
1344
1345                in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1346                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1347
1348                if (debug)
1349                        pr_debug("dst6_max set to: %s\n", buf);
1350
1351                i += len;
1352                sprintf(pg_result, "OK: dst6_max=%s", buf);
1353                return count;
1354        }
1355        if (!strcmp(name, "src6")) {
1356                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1357                if (len < 0)
1358                        return len;
1359
1360                pkt_dev->flags |= F_IPV6;
1361
1362                if (copy_from_user(buf, &user_buffer[i], len))
1363                        return -EFAULT;
1364                buf[len] = 0;
1365
1366                in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1367                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1368
1369                pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1370
1371                if (debug)
1372                        pr_debug("src6 set to: %s\n", buf);
1373
1374                i += len;
1375                sprintf(pg_result, "OK: src6=%s", buf);
1376                return count;
1377        }
1378        if (!strcmp(name, "src_min")) {
1379                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1380                if (len < 0)
1381                        return len;
1382
1383                if (copy_from_user(buf, &user_buffer[i], len))
1384                        return -EFAULT;
1385                buf[len] = 0;
1386                if (strcmp(buf, pkt_dev->src_min) != 0) {
1387                        memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1388                        strncpy(pkt_dev->src_min, buf, len);
1389                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1390                        pkt_dev->cur_saddr = pkt_dev->saddr_min;
1391                }
1392                if (debug)
1393                        pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1394                i += len;
1395                sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1396                return count;
1397        }
1398        if (!strcmp(name, "src_max")) {
1399                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1400                if (len < 0)
1401                        return len;
1402
1403                if (copy_from_user(buf, &user_buffer[i], len))
1404                        return -EFAULT;
1405                buf[len] = 0;
1406                if (strcmp(buf, pkt_dev->src_max) != 0) {
1407                        memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1408                        strncpy(pkt_dev->src_max, buf, len);
1409                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1410                        pkt_dev->cur_saddr = pkt_dev->saddr_max;
1411                }
1412                if (debug)
1413                        pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1414                i += len;
1415                sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1416                return count;
1417        }
1418        if (!strcmp(name, "dst_mac")) {
1419                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1420                if (len < 0)
1421                        return len;
1422
1423                memset(valstr, 0, sizeof(valstr));
1424                if (copy_from_user(valstr, &user_buffer[i], len))
1425                        return -EFAULT;
1426
1427                if (!mac_pton(valstr, pkt_dev->dst_mac))
1428                        return -EINVAL;
1429                /* Set up Dest MAC */
1430                memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1431
1432                sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1433                return count;
1434        }
1435        if (!strcmp(name, "src_mac")) {
1436                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1437                if (len < 0)
1438                        return len;
1439
1440                memset(valstr, 0, sizeof(valstr));
1441                if (copy_from_user(valstr, &user_buffer[i], len))
1442                        return -EFAULT;
1443
1444                if (!mac_pton(valstr, pkt_dev->src_mac))
1445                        return -EINVAL;
1446                /* Set up Src MAC */
1447                memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1448
1449                sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1450                return count;
1451        }
1452
1453        if (!strcmp(name, "clear_counters")) {
1454                pktgen_clear_counters(pkt_dev);
1455                sprintf(pg_result, "OK: Clearing counters.\n");
1456                return count;
1457        }
1458
1459        if (!strcmp(name, "flows")) {
1460                len = num_arg(&user_buffer[i], 10, &value);
1461                if (len < 0)
1462                        return len;
1463
1464                i += len;
1465                if (value > MAX_CFLOWS)
1466                        value = MAX_CFLOWS;
1467
1468                pkt_dev->cflows = value;
1469                sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1470                return count;
1471        }
1472
1473        if (!strcmp(name, "flowlen")) {
1474                len = num_arg(&user_buffer[i], 10, &value);
1475                if (len < 0)
1476                        return len;
1477
1478                i += len;
1479                pkt_dev->lflow = value;
1480                sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1481                return count;
1482        }
1483
1484        if (!strcmp(name, "queue_map_min")) {
1485                len = num_arg(&user_buffer[i], 5, &value);
1486                if (len < 0)
1487                        return len;
1488
1489                i += len;
1490                pkt_dev->queue_map_min = value;
1491                sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1492                return count;
1493        }
1494
1495        if (!strcmp(name, "queue_map_max")) {
1496                len = num_arg(&user_buffer[i], 5, &value);
1497                if (len < 0)
1498                        return len;
1499
1500                i += len;
1501                pkt_dev->queue_map_max = value;
1502                sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1503                return count;
1504        }
1505
1506        if (!strcmp(name, "mpls")) {
1507                unsigned int n, cnt;
1508
1509                len = get_labels(&user_buffer[i], pkt_dev);
1510                if (len < 0)
1511                        return len;
1512                i += len;
1513                cnt = sprintf(pg_result, "OK: mpls=");
1514                for (n = 0; n < pkt_dev->nr_labels; n++)
1515                        cnt += sprintf(pg_result + cnt,
1516                                       "%08x%s", ntohl(pkt_dev->labels[n]),
1517                                       n == pkt_dev->nr_labels-1 ? "" : ",");
1518
1519                if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1520                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1521                        pkt_dev->svlan_id = 0xffff;
1522
1523                        if (debug)
1524                                pr_debug("VLAN/SVLAN auto turned off\n");
1525                }
1526                return count;
1527        }
1528
1529        if (!strcmp(name, "vlan_id")) {
1530                len = num_arg(&user_buffer[i], 4, &value);
1531                if (len < 0)
1532                        return len;
1533
1534                i += len;
1535                if (value <= 4095) {
1536                        pkt_dev->vlan_id = value;  /* turn on VLAN */
1537
1538                        if (debug)
1539                                pr_debug("VLAN turned on\n");
1540
1541                        if (debug && pkt_dev->nr_labels)
1542                                pr_debug("MPLS auto turned off\n");
1543
1544                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1545                        sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1546                } else {
1547                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1548                        pkt_dev->svlan_id = 0xffff;
1549
1550                        if (debug)
1551                                pr_debug("VLAN/SVLAN turned off\n");
1552                }
1553                return count;
1554        }
1555
1556        if (!strcmp(name, "vlan_p")) {
1557                len = num_arg(&user_buffer[i], 1, &value);
1558                if (len < 0)
1559                        return len;
1560
1561                i += len;
1562                if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1563                        pkt_dev->vlan_p = value;
1564                        sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1565                } else {
1566                        sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1567                }
1568                return count;
1569        }
1570
1571        if (!strcmp(name, "vlan_cfi")) {
1572                len = num_arg(&user_buffer[i], 1, &value);
1573                if (len < 0)
1574                        return len;
1575
1576                i += len;
1577                if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1578                        pkt_dev->vlan_cfi = value;
1579                        sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1580                } else {
1581                        sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1582                }
1583                return count;
1584        }
1585
1586        if (!strcmp(name, "svlan_id")) {
1587                len = num_arg(&user_buffer[i], 4, &value);
1588                if (len < 0)
1589                        return len;
1590
1591                i += len;
1592                if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1593                        pkt_dev->svlan_id = value;  /* turn on SVLAN */
1594
1595                        if (debug)
1596                                pr_debug("SVLAN turned on\n");
1597
1598                        if (debug && pkt_dev->nr_labels)
1599                                pr_debug("MPLS auto turned off\n");
1600
1601                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1602                        sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1603                } else {
1604                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1605                        pkt_dev->svlan_id = 0xffff;
1606
1607                        if (debug)
1608                                pr_debug("VLAN/SVLAN turned off\n");
1609                }
1610                return count;
1611        }
1612
1613        if (!strcmp(name, "svlan_p")) {
1614                len = num_arg(&user_buffer[i], 1, &value);
1615                if (len < 0)
1616                        return len;
1617
1618                i += len;
1619                if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1620                        pkt_dev->svlan_p = value;
1621                        sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1622                } else {
1623                        sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1624                }
1625                return count;
1626        }
1627
1628        if (!strcmp(name, "svlan_cfi")) {
1629                len = num_arg(&user_buffer[i], 1, &value);
1630                if (len < 0)
1631                        return len;
1632
1633                i += len;
1634                if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1635                        pkt_dev->svlan_cfi = value;
1636                        sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1637                } else {
1638                        sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1639                }
1640                return count;
1641        }
1642
1643        if (!strcmp(name, "tos")) {
1644                __u32 tmp_value = 0;
1645                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1646                if (len < 0)
1647                        return len;
1648
1649                i += len;
1650                if (len == 2) {
1651                        pkt_dev->tos = tmp_value;
1652                        sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1653                } else {
1654                        sprintf(pg_result, "ERROR: tos must be 00-ff");
1655                }
1656                return count;
1657        }
1658
1659        if (!strcmp(name, "traffic_class")) {
1660                __u32 tmp_value = 0;
1661                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1662                if (len < 0)
1663                        return len;
1664
1665                i += len;
1666                if (len == 2) {
1667                        pkt_dev->traffic_class = tmp_value;
1668                        sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1669                } else {
1670                        sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1671                }
1672                return count;
1673        }
1674
1675        if (!strcmp(name, "skb_priority")) {
1676                len = num_arg(&user_buffer[i], 9, &value);
1677                if (len < 0)
1678                        return len;
1679
1680                i += len;
1681                pkt_dev->skb_priority = value;
1682                sprintf(pg_result, "OK: skb_priority=%i",
1683                        pkt_dev->skb_priority);
1684                return count;
1685        }
1686
1687        sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1688        return -EINVAL;
1689}
1690
1691static int pktgen_if_open(struct inode *inode, struct file *file)
1692{
1693        return single_open(file, pktgen_if_show, PDE(inode)->data);
1694}
1695
1696static const struct file_operations pktgen_if_fops = {
1697        .owner   = THIS_MODULE,
1698        .open    = pktgen_if_open,
1699        .read    = seq_read,
1700        .llseek  = seq_lseek,
1701        .write   = pktgen_if_write,
1702        .release = single_release,
1703};
1704
1705static int pktgen_thread_show(struct seq_file *seq, void *v)
1706{
1707        struct pktgen_thread *t = seq->private;
1708        const struct pktgen_dev *pkt_dev;
1709
1710        BUG_ON(!t);
1711
1712        seq_printf(seq, "Running: ");
1713
1714        if_lock(t);
1715        list_for_each_entry(pkt_dev, &t->if_list, list)
1716                if (pkt_dev->running)
1717                        seq_printf(seq, "%s ", pkt_dev->odevname);
1718
1719        seq_printf(seq, "\nStopped: ");
1720
1721        list_for_each_entry(pkt_dev, &t->if_list, list)
1722                if (!pkt_dev->running)
1723                        seq_printf(seq, "%s ", pkt_dev->odevname);
1724
1725        if (t->result[0])
1726                seq_printf(seq, "\nResult: %s\n", t->result);
1727        else
1728                seq_printf(seq, "\nResult: NA\n");
1729
1730        if_unlock(t);
1731
1732        return 0;
1733}
1734
1735static ssize_t pktgen_thread_write(struct file *file,
1736                                   const char __user * user_buffer,
1737                                   size_t count, loff_t * offset)
1738{
1739        struct seq_file *seq = file->private_data;
1740        struct pktgen_thread *t = seq->private;
1741        int i, max, len, ret;
1742        char name[40];
1743        char *pg_result;
1744
1745        if (count < 1) {
1746                //      sprintf(pg_result, "Wrong command format");
1747                return -EINVAL;
1748        }
1749
1750        max = count;
1751        len = count_trail_chars(user_buffer, max);
1752        if (len < 0)
1753                return len;
1754
1755        i = len;
1756
1757        /* Read variable name */
1758
1759        len = strn_len(&user_buffer[i], sizeof(name) - 1);
1760        if (len < 0)
1761                return len;
1762
1763        memset(name, 0, sizeof(name));
1764        if (copy_from_user(name, &user_buffer[i], len))
1765                return -EFAULT;
1766        i += len;
1767
1768        max = count - i;
1769        len = count_trail_chars(&user_buffer[i], max);
1770        if (len < 0)
1771                return len;
1772
1773        i += len;
1774
1775        if (debug)
1776                pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1777
1778        if (!t) {
1779                pr_err("ERROR: No thread\n");
1780                ret = -EINVAL;
1781                goto out;
1782        }
1783
1784        pg_result = &(t->result[0]);
1785
1786        if (!strcmp(name, "add_device")) {
1787                char f[32];
1788                memset(f, 0, 32);
1789                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1790                if (len < 0) {
1791                        ret = len;
1792                        goto out;
1793                }
1794                if (copy_from_user(f, &user_buffer[i], len))
1795                        return -EFAULT;
1796                i += len;
1797                mutex_lock(&pktgen_thread_lock);
1798                pktgen_add_device(t, f);
1799                mutex_unlock(&pktgen_thread_lock);
1800                ret = count;
1801                sprintf(pg_result, "OK: add_device=%s", f);
1802                goto out;
1803        }
1804
1805        if (!strcmp(name, "rem_device_all")) {
1806                mutex_lock(&pktgen_thread_lock);
1807                t->control |= T_REMDEVALL;
1808                mutex_unlock(&pktgen_thread_lock);
1809                schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1810                ret = count;
1811                sprintf(pg_result, "OK: rem_device_all");
1812                goto out;
1813        }
1814
1815        if (!strcmp(name, "max_before_softirq")) {
1816                sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1817                ret = count;
1818                goto out;
1819        }
1820
1821        ret = -EINVAL;
1822out:
1823        return ret;
1824}
1825
1826static int pktgen_thread_open(struct inode *inode, struct file *file)
1827{
1828        return single_open(file, pktgen_thread_show, PDE(inode)->data);
1829}
1830
1831static const struct file_operations pktgen_thread_fops = {
1832        .owner   = THIS_MODULE,
1833        .open    = pktgen_thread_open,
1834        .read    = seq_read,
1835        .llseek  = seq_lseek,
1836        .write   = pktgen_thread_write,
1837        .release = single_release,
1838};
1839
1840/* Think find or remove for NN */
1841static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1842{
1843        struct pktgen_thread *t;
1844        struct pktgen_dev *pkt_dev = NULL;
1845        bool exact = (remove == FIND);
1846
1847        list_for_each_entry(t, &pktgen_threads, th_list) {
1848                pkt_dev = pktgen_find_dev(t, ifname, exact);
1849                if (pkt_dev) {
1850                        if (remove) {
1851                                if_lock(t);
1852                                pkt_dev->removal_mark = 1;
1853                                t->control |= T_REMDEV;
1854                                if_unlock(t);
1855                        }
1856                        break;
1857                }
1858        }
1859        return pkt_dev;
1860}
1861
1862/*
1863 * mark a device for removal
1864 */
1865static void pktgen_mark_device(const char *ifname)
1866{
1867        struct pktgen_dev *pkt_dev = NULL;
1868        const int max_tries = 10, msec_per_try = 125;
1869        int i = 0;
1870
1871        mutex_lock(&pktgen_thread_lock);
1872        pr_debug("%s: marking %s for removal\n", __func__, ifname);
1873
1874        while (1) {
1875
1876                pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1877                if (pkt_dev == NULL)
1878                        break;  /* success */
1879
1880                mutex_unlock(&pktgen_thread_lock);
1881                pr_debug("%s: waiting for %s to disappear....\n",
1882                         __func__, ifname);
1883                schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1884                mutex_lock(&pktgen_thread_lock);
1885
1886                if (++i >= max_tries) {
1887                        pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1888                               __func__, msec_per_try * i, ifname);
1889                        break;
1890                }
1891
1892        }
1893
1894        mutex_unlock(&pktgen_thread_lock);
1895}
1896
1897static void pktgen_change_name(struct net_device *dev)
1898{
1899        struct pktgen_thread *t;
1900
1901        list_for_each_entry(t, &pktgen_threads, th_list) {
1902                struct pktgen_dev *pkt_dev;
1903
1904                list_for_each_entry(pkt_dev, &t->if_list, list) {
1905                        if (pkt_dev->odev != dev)
1906                                continue;
1907
1908                        remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1909
1910                        pkt_dev->entry = proc_create_data(dev->name, 0600,
1911                                                          pg_proc_dir,
1912                                                          &pktgen_if_fops,
1913                                                          pkt_dev);
1914                        if (!pkt_dev->entry)
1915                                pr_err("can't move proc entry for '%s'\n",
1916                                       dev->name);
1917                        break;
1918                }
1919        }
1920}
1921
1922static int pktgen_device_event(struct notifier_block *unused,
1923                               unsigned long event, void *ptr)
1924{
1925        struct net_device *dev = ptr;
1926
1927        if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting)
1928                return NOTIFY_DONE;
1929
1930        /* It is OK that we do not hold the group lock right now,
1931         * as we run under the RTNL lock.
1932         */
1933
1934        switch (event) {
1935        case NETDEV_CHANGENAME:
1936                pktgen_change_name(dev);
1937                break;
1938
1939        case NETDEV_UNREGISTER:
1940                pktgen_mark_device(dev->name);
1941                break;
1942        }
1943
1944        return NOTIFY_DONE;
1945}
1946
1947static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1948                                                 const char *ifname)
1949{
1950        char b[IFNAMSIZ+5];
1951        int i;
1952
1953        for (i = 0; ifname[i] != '@'; i++) {
1954                if (i == IFNAMSIZ)
1955                        break;
1956
1957                b[i] = ifname[i];
1958        }
1959        b[i] = 0;
1960
1961        return dev_get_by_name(&init_net, b);
1962}
1963
1964
1965/* Associate pktgen_dev with a device. */
1966
1967static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1968{
1969        struct net_device *odev;
1970        int err;
1971
1972        /* Clean old setups */
1973        if (pkt_dev->odev) {
1974                dev_put(pkt_dev->odev);
1975                pkt_dev->odev = NULL;
1976        }
1977
1978        odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1979        if (!odev) {
1980                pr_err("no such netdevice: \"%s\"\n", ifname);
1981                return -ENODEV;
1982        }
1983
1984        if (odev->type != ARPHRD_ETHER) {
1985                pr_err("not an ethernet device: \"%s\"\n", ifname);
1986                err = -EINVAL;
1987        } else if (!netif_running(odev)) {
1988                pr_err("device is down: \"%s\"\n", ifname);
1989                err = -ENETDOWN;
1990        } else {
1991                pkt_dev->odev = odev;
1992                return 0;
1993        }
1994
1995        dev_put(odev);
1996        return err;
1997}
1998
1999/* Read pkt_dev from the interface and set up internal pktgen_dev
2000 * structure to have the right information to create/send packets
2001 */
2002static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2003{
2004        int ntxq;
2005
2006        if (!pkt_dev->odev) {
2007                pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2008                sprintf(pkt_dev->result,
2009                        "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2010                return;
2011        }
2012
2013        /* make sure that we don't pick a non-existing transmit queue */
2014        ntxq = pkt_dev->odev->real_num_tx_queues;
2015
2016        if (ntxq <= pkt_dev->queue_map_min) {
2017                pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2018                           pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2019                           pkt_dev->odevname);
2020                pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2021        }
2022        if (pkt_dev->queue_map_max >= ntxq) {
2023                pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2024                           pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2025                           pkt_dev->odevname);
2026                pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2027        }
2028
2029        /* Default to the interface's mac if not explicitly set. */
2030
2031        if (is_zero_ether_addr(pkt_dev->src_mac))
2032                memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2033
2034        /* Set up Dest MAC */
2035        memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2036
2037        if (pkt_dev->flags & F_IPV6) {
2038                int i, set = 0, err = 1;
2039                struct inet6_dev *idev;
2040
2041                if (pkt_dev->min_pkt_size == 0) {
2042                        pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2043                                                + sizeof(struct udphdr)
2044                                                + sizeof(struct pktgen_hdr)
2045                                                + pkt_dev->pkt_overhead;
2046                }
2047
2048                for (i = 0; i < IN6_ADDR_HSIZE; i++)
2049                        if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2050                                set = 1;
2051                                break;
2052                        }
2053
2054                if (!set) {
2055
2056                        /*
2057                         * Use linklevel address if unconfigured.
2058                         *
2059                         * use ipv6_get_lladdr if/when it's get exported
2060                         */
2061
2062                        rcu_read_lock();
2063                        idev = __in6_dev_get(pkt_dev->odev);
2064                        if (idev) {
2065                                struct inet6_ifaddr *ifp;
2066
2067                                read_lock_bh(&idev->lock);
2068                                list_for_each_entry(ifp, &idev->addr_list, if_list) {
2069                                        if ((ifp->scope & IFA_LINK) &&
2070                                            !(ifp->flags & IFA_F_TENTATIVE)) {
2071                                                pkt_dev->cur_in6_saddr = ifp->addr;
2072                                                err = 0;
2073                                                break;
2074                                        }
2075                                }
2076                                read_unlock_bh(&idev->lock);
2077                        }
2078                        rcu_read_unlock();
2079                        if (err)
2080                                pr_err("ERROR: IPv6 link address not available\n");
2081                }
2082        } else {
2083                if (pkt_dev->min_pkt_size == 0) {
2084                        pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2085                                                + sizeof(struct udphdr)
2086                                                + sizeof(struct pktgen_hdr)
2087                                                + pkt_dev->pkt_overhead;
2088                }
2089
2090                pkt_dev->saddr_min = 0;
2091                pkt_dev->saddr_max = 0;
2092                if (strlen(pkt_dev->src_min) == 0) {
2093
2094                        struct in_device *in_dev;
2095
2096                        rcu_read_lock();
2097                        in_dev = __in_dev_get_rcu(pkt_dev->odev);
2098                        if (in_dev) {
2099                                if (in_dev->ifa_list) {
2100                                        pkt_dev->saddr_min =
2101                                            in_dev->ifa_list->ifa_address;
2102                                        pkt_dev->saddr_max = pkt_dev->saddr_min;
2103                                }
2104                        }
2105                        rcu_read_unlock();
2106                } else {
2107                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2108                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2109                }
2110
2111                pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2112                pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2113        }
2114        /* Initialize current values. */
2115        pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2116        if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2117                pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2118
2119        pkt_dev->cur_dst_mac_offset = 0;
2120        pkt_dev->cur_src_mac_offset = 0;
2121        pkt_dev->cur_saddr = pkt_dev->saddr_min;
2122        pkt_dev->cur_daddr = pkt_dev->daddr_min;
2123        pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2124        pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2125        pkt_dev->nflows = 0;
2126}
2127
2128
2129static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2130{
2131        ktime_t start_time, end_time;
2132        s64 remaining;
2133        struct hrtimer_sleeper t;
2134
2135        hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2136        hrtimer_set_expires(&t.timer, spin_until);
2137
2138        remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2139        if (remaining <= 0) {
2140                pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2141                return;
2142        }
2143
2144        start_time = ktime_now();
2145        if (remaining < 100000) {
2146                /* for small delays (<100us), just loop until limit is reached */
2147                do {
2148                        end_time = ktime_now();
2149                } while (ktime_lt(end_time, spin_until));
2150        } else {
2151                /* see do_nanosleep */
2152                hrtimer_init_sleeper(&t, current);
2153                do {
2154                        set_current_state(TASK_INTERRUPTIBLE);
2155                        hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2156                        if (!hrtimer_active(&t.timer))
2157                                t.task = NULL;
2158
2159                        if (likely(t.task))
2160                                schedule();
2161
2162                        hrtimer_cancel(&t.timer);
2163                } while (t.task && pkt_dev->running && !signal_pending(current));
2164                __set_current_state(TASK_RUNNING);
2165                end_time = ktime_now();
2166        }
2167
2168        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2169        pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2170}
2171
2172static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2173{
2174        pkt_dev->pkt_overhead = 0;
2175        pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2176        pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2177        pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2178}
2179
2180static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2181{
2182        return !!(pkt_dev->flows[flow].flags & F_INIT);
2183}
2184
2185static inline int f_pick(struct pktgen_dev *pkt_dev)
2186{
2187        int flow = pkt_dev->curfl;
2188
2189        if (pkt_dev->flags & F_FLOW_SEQ) {
2190                if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2191                        /* reset time */
2192                        pkt_dev->flows[flow].count = 0;
2193                        pkt_dev->flows[flow].flags = 0;
2194                        pkt_dev->curfl += 1;
2195                        if (pkt_dev->curfl >= pkt_dev->cflows)
2196                                pkt_dev->curfl = 0; /*reset */
2197                }
2198        } else {
2199                flow = random32() % pkt_dev->cflows;
2200                pkt_dev->curfl = flow;
2201
2202                if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2203                        pkt_dev->flows[flow].count = 0;
2204                        pkt_dev->flows[flow].flags = 0;
2205                }
2206        }
2207
2208        return pkt_dev->curfl;
2209}
2210
2211
2212#ifdef CONFIG_XFRM
2213/* If there was already an IPSEC SA, we keep it as is, else
2214 * we go look for it ...
2215*/
2216#define DUMMY_MARK 0
2217static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2218{
2219        struct xfrm_state *x = pkt_dev->flows[flow].x;
2220        if (!x) {
2221                /*slow path: we dont already have xfrm_state*/
2222                x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2223                                        (xfrm_address_t *)&pkt_dev->cur_daddr,
2224                                        (xfrm_address_t *)&pkt_dev->cur_saddr,
2225                                        AF_INET,
2226                                        pkt_dev->ipsmode,
2227                                        pkt_dev->ipsproto, 0);
2228                if (x) {
2229                        pkt_dev->flows[flow].x = x;
2230                        set_pkt_overhead(pkt_dev);
2231                        pkt_dev->pkt_overhead += x->props.header_len;
2232                }
2233
2234        }
2235}
2236#endif
2237static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2238{
2239
2240        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2241                pkt_dev->cur_queue_map = smp_processor_id();
2242
2243        else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2244                __u16 t;
2245                if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2246                        t = random32() %
2247                                (pkt_dev->queue_map_max -
2248                                 pkt_dev->queue_map_min + 1)
2249                                + pkt_dev->queue_map_min;
2250                } else {
2251                        t = pkt_dev->cur_queue_map + 1;
2252                        if (t > pkt_dev->queue_map_max)
2253                                t = pkt_dev->queue_map_min;
2254                }
2255                pkt_dev->cur_queue_map = t;
2256        }
2257        pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2258}
2259
2260/* Increment/randomize headers according to flags and current values
2261 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2262 */
2263static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2264{
2265        __u32 imn;
2266        __u32 imx;
2267        int flow = 0;
2268
2269        if (pkt_dev->cflows)
2270                flow = f_pick(pkt_dev);
2271
2272        /*  Deal with source MAC */
2273        if (pkt_dev->src_mac_count > 1) {
2274                __u32 mc;
2275                __u32 tmp;
2276
2277                if (pkt_dev->flags & F_MACSRC_RND)
2278                        mc = random32() % pkt_dev->src_mac_count;
2279                else {
2280                        mc = pkt_dev->cur_src_mac_offset++;
2281                        if (pkt_dev->cur_src_mac_offset >=
2282                            pkt_dev->src_mac_count)
2283                                pkt_dev->cur_src_mac_offset = 0;
2284                }
2285
2286                tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2287                pkt_dev->hh[11] = tmp;
2288                tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2289                pkt_dev->hh[10] = tmp;
2290                tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2291                pkt_dev->hh[9] = tmp;
2292                tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2293                pkt_dev->hh[8] = tmp;
2294                tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2295                pkt_dev->hh[7] = tmp;
2296        }
2297
2298        /*  Deal with Destination MAC */
2299        if (pkt_dev->dst_mac_count > 1) {
2300                __u32 mc;
2301                __u32 tmp;
2302
2303                if (pkt_dev->flags & F_MACDST_RND)
2304                        mc = random32() % pkt_dev->dst_mac_count;
2305
2306                else {
2307                        mc = pkt_dev->cur_dst_mac_offset++;
2308                        if (pkt_dev->cur_dst_mac_offset >=
2309                            pkt_dev->dst_mac_count) {
2310                                pkt_dev->cur_dst_mac_offset = 0;
2311                        }
2312                }
2313
2314                tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2315                pkt_dev->hh[5] = tmp;
2316                tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2317                pkt_dev->hh[4] = tmp;
2318                tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2319                pkt_dev->hh[3] = tmp;
2320                tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2321                pkt_dev->hh[2] = tmp;
2322                tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2323                pkt_dev->hh[1] = tmp;
2324        }
2325
2326        if (pkt_dev->flags & F_MPLS_RND) {
2327                unsigned int i;
2328                for (i = 0; i < pkt_dev->nr_labels; i++)
2329                        if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2330                                pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2331                                             ((__force __be32)random32() &
2332                                                      htonl(0x000fffff));
2333        }
2334
2335        if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2336                pkt_dev->vlan_id = random32() & (4096-1);
2337        }
2338
2339        if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2340                pkt_dev->svlan_id = random32() & (4096 - 1);
2341        }
2342
2343        if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2344                if (pkt_dev->flags & F_UDPSRC_RND)
2345                        pkt_dev->cur_udp_src = random32() %
2346                                (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2347                                + pkt_dev->udp_src_min;
2348
2349                else {
2350                        pkt_dev->cur_udp_src++;
2351                        if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2352                                pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2353                }
2354        }
2355
2356        if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2357                if (pkt_dev->flags & F_UDPDST_RND) {
2358                        pkt_dev->cur_udp_dst = random32() %
2359                                (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2360                                + pkt_dev->udp_dst_min;
2361                } else {
2362                        pkt_dev->cur_udp_dst++;
2363                        if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2364                                pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2365                }
2366        }
2367
2368        if (!(pkt_dev->flags & F_IPV6)) {
2369
2370                imn = ntohl(pkt_dev->saddr_min);
2371                imx = ntohl(pkt_dev->saddr_max);
2372                if (imn < imx) {
2373                        __u32 t;
2374                        if (pkt_dev->flags & F_IPSRC_RND)
2375                                t = random32() % (imx - imn) + imn;
2376                        else {
2377                                t = ntohl(pkt_dev->cur_saddr);
2378                                t++;
2379                                if (t > imx)
2380                                        t = imn;
2381
2382                        }
2383                        pkt_dev->cur_saddr = htonl(t);
2384                }
2385
2386                if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2387                        pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2388                } else {
2389                        imn = ntohl(pkt_dev->daddr_min);
2390                        imx = ntohl(pkt_dev->daddr_max);
2391                        if (imn < imx) {
2392                                __u32 t;
2393                                __be32 s;
2394                                if (pkt_dev->flags & F_IPDST_RND) {
2395
2396                                        t = random32() % (imx - imn) + imn;
2397                                        s = htonl(t);
2398
2399                                        while (ipv4_is_loopback(s) ||
2400                                               ipv4_is_multicast(s) ||
2401                                               ipv4_is_lbcast(s) ||
2402                                               ipv4_is_zeronet(s) ||
2403                                               ipv4_is_local_multicast(s)) {
2404                                                t = random32() % (imx - imn) + imn;
2405                                                s = htonl(t);
2406                                        }
2407                                        pkt_dev->cur_daddr = s;
2408                                } else {
2409                                        t = ntohl(pkt_dev->cur_daddr);
2410                                        t++;
2411                                        if (t > imx) {
2412                                                t = imn;
2413                                        }
2414                                        pkt_dev->cur_daddr = htonl(t);
2415                                }
2416                        }
2417                        if (pkt_dev->cflows) {
2418                                pkt_dev->flows[flow].flags |= F_INIT;
2419                                pkt_dev->flows[flow].cur_daddr =
2420                                    pkt_dev->cur_daddr;
2421#ifdef CONFIG_XFRM
2422                                if (pkt_dev->flags & F_IPSEC_ON)
2423                                        get_ipsec_sa(pkt_dev, flow);
2424#endif
2425                                pkt_dev->nflows++;
2426                        }
2427                }
2428        } else {                /* IPV6 * */
2429
2430                if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2431                    pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2432                    pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2433                    pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2434                else {
2435                        int i;
2436
2437                        /* Only random destinations yet */
2438
2439                        for (i = 0; i < 4; i++) {
2440                                pkt_dev->cur_in6_daddr.s6_addr32[i] =
2441                                    (((__force __be32)random32() |
2442                                      pkt_dev->min_in6_daddr.s6_addr32[i]) &
2443                                     pkt_dev->max_in6_daddr.s6_addr32[i]);
2444                        }
2445                }
2446        }
2447
2448        if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2449                __u32 t;
2450                if (pkt_dev->flags & F_TXSIZE_RND) {
2451                        t = random32() %
2452                                (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2453                                + pkt_dev->min_pkt_size;
2454                } else {
2455                        t = pkt_dev->cur_pkt_size + 1;
2456                        if (t > pkt_dev->max_pkt_size)
2457                                t = pkt_dev->min_pkt_size;
2458                }
2459                pkt_dev->cur_pkt_size = t;
2460        }
2461
2462        set_cur_queue_map(pkt_dev);
2463
2464        pkt_dev->flows[flow].count++;
2465}
2466
2467
2468#ifdef CONFIG_XFRM
2469static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2470{
2471        struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2472        int err = 0;
2473
2474        if (!x)
2475                return 0;
2476        /* XXX: we dont support tunnel mode for now until
2477         * we resolve the dst issue */
2478        if (x->props.mode != XFRM_MODE_TRANSPORT)
2479                return 0;
2480
2481        spin_lock(&x->lock);
2482
2483        err = x->outer_mode->output(x, skb);
2484        if (err)
2485                goto error;
2486        err = x->type->output(x, skb);
2487        if (err)
2488                goto error;
2489
2490        x->curlft.bytes += skb->len;
2491        x->curlft.packets++;
2492error:
2493        spin_unlock(&x->lock);
2494        return err;
2495}
2496
2497static void free_SAs(struct pktgen_dev *pkt_dev)
2498{
2499        if (pkt_dev->cflows) {
2500                /* let go of the SAs if we have them */
2501                int i;
2502                for (i = 0; i < pkt_dev->cflows; i++) {
2503                        struct xfrm_state *x = pkt_dev->flows[i].x;
2504                        if (x) {
2505                                xfrm_state_put(x);
2506                                pkt_dev->flows[i].x = NULL;
2507                        }
2508                }
2509        }
2510}
2511
2512static int process_ipsec(struct pktgen_dev *pkt_dev,
2513                              struct sk_buff *skb, __be16 protocol)
2514{
2515        if (pkt_dev->flags & F_IPSEC_ON) {
2516                struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2517                int nhead = 0;
2518                if (x) {
2519                        int ret;
2520                        __u8 *eth;
2521                        nhead = x->props.header_len - skb_headroom(skb);
2522                        if (nhead > 0) {
2523                                ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2524                                if (ret < 0) {
2525                                        pr_err("Error expanding ipsec packet %d\n",
2526                                               ret);
2527                                        goto err;
2528                                }
2529                        }
2530
2531                        /* ipsec is not expecting ll header */
2532                        skb_pull(skb, ETH_HLEN);
2533                        ret = pktgen_output_ipsec(skb, pkt_dev);
2534                        if (ret) {
2535                                pr_err("Error creating ipsec packet %d\n", ret);
2536                                goto err;
2537                        }
2538                        /* restore ll */
2539                        eth = (__u8 *) skb_push(skb, ETH_HLEN);
2540                        memcpy(eth, pkt_dev->hh, 12);
2541                        *(u16 *) &eth[12] = protocol;
2542                }
2543        }
2544        return 1;
2545err:
2546        kfree_skb(skb);
2547        return 0;
2548}
2549#endif
2550
2551static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2552{
2553        unsigned int i;
2554        for (i = 0; i < pkt_dev->nr_labels; i++)
2555                *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2556
2557        mpls--;
2558        *mpls |= MPLS_STACK_BOTTOM;
2559}
2560
2561static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2562                               unsigned int prio)
2563{
2564        return htons(id | (cfi << 12) | (prio << 13));
2565}
2566
2567static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2568                                int datalen)
2569{
2570        struct timeval timestamp;
2571        struct pktgen_hdr *pgh;
2572
2573        pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2574        datalen -= sizeof(*pgh);
2575
2576        if (pkt_dev->nfrags <= 0) {
2577                memset(skb_put(skb, datalen), 0, datalen);
2578        } else {
2579                int frags = pkt_dev->nfrags;
2580                int i, len;
2581                int frag_len;
2582
2583
2584                if (frags > MAX_SKB_FRAGS)
2585                        frags = MAX_SKB_FRAGS;
2586                len = datalen - frags * PAGE_SIZE;
2587                if (len > 0) {
2588                        memset(skb_put(skb, len), 0, len);
2589                        datalen = frags * PAGE_SIZE;
2590                }
2591
2592                i = 0;
2593                frag_len = (datalen/frags) < PAGE_SIZE ?
2594                           (datalen/frags) : PAGE_SIZE;
2595                while (datalen > 0) {
2596                        if (unlikely(!pkt_dev->page)) {
2597                                int node = numa_node_id();
2598
2599                                if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2600                                        node = pkt_dev->node;
2601                                pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2602                                if (!pkt_dev->page)
2603                                        break;
2604                        }
2605                        get_page(pkt_dev->page);
2606                        skb_frag_set_page(skb, i, pkt_dev->page);
2607                        skb_shinfo(skb)->frags[i].page_offset = 0;
2608                        /*last fragment, fill rest of data*/
2609                        if (i == (frags - 1))
2610                                skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2611                                    (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2612                        else
2613                                skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2614                        datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2615                        skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2616                        skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2617                        i++;
2618                        skb_shinfo(skb)->nr_frags = i;
2619                }
2620        }
2621
2622        /* Stamp the time, and sequence number,
2623         * convert them to network byte order
2624         */
2625        pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2626        pgh->seq_num = htonl(pkt_dev->seq_num);
2627
2628        do_gettimeofday(&timestamp);
2629        pgh->tv_sec = htonl(timestamp.tv_sec);
2630        pgh->tv_usec = htonl(timestamp.tv_usec);
2631}
2632
2633static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2634                                        struct pktgen_dev *pkt_dev)
2635{
2636        struct sk_buff *skb = NULL;
2637        __u8 *eth;
2638        struct udphdr *udph;
2639        int datalen, iplen;
2640        struct iphdr *iph;
2641        __be16 protocol = htons(ETH_P_IP);
2642        __be32 *mpls;
2643        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2644        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2645        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2646        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2647        u16 queue_map;
2648
2649        if (pkt_dev->nr_labels)
2650                protocol = htons(ETH_P_MPLS_UC);
2651
2652        if (pkt_dev->vlan_id != 0xffff)
2653                protocol = htons(ETH_P_8021Q);
2654
2655        /* Update any of the values, used when we're incrementing various
2656         * fields.
2657         */
2658        mod_cur_headers(pkt_dev);
2659        queue_map = pkt_dev->cur_queue_map;
2660
2661        datalen = (odev->hard_header_len + 16) & ~0xf;
2662
2663        if (pkt_dev->flags & F_NODE) {
2664                int node;
2665
2666                if (pkt_dev->node >= 0)
2667                        node = pkt_dev->node;
2668                else
2669                        node =  numa_node_id();
2670
2671                skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2672                                  + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2673                if (likely(skb)) {
2674                        skb_reserve(skb, NET_SKB_PAD);
2675                        skb->dev = odev;
2676                }
2677        }
2678        else
2679          skb = __netdev_alloc_skb(odev,
2680                                   pkt_dev->cur_pkt_size + 64
2681                                   + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2682
2683        if (!skb) {
2684                sprintf(pkt_dev->result, "No memory");
2685                return NULL;
2686        }
2687        prefetchw(skb->data);
2688
2689        skb_reserve(skb, datalen);
2690
2691        /*  Reserve for ethernet and IP header  */
2692        eth = (__u8 *) skb_push(skb, 14);
2693        mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2694        if (pkt_dev->nr_labels)
2695                mpls_push(mpls, pkt_dev);
2696
2697        if (pkt_dev->vlan_id != 0xffff) {
2698                if (pkt_dev->svlan_id != 0xffff) {
2699                        svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2700                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2701                                               pkt_dev->svlan_cfi,
2702                                               pkt_dev->svlan_p);
2703                        svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2704                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2705                }
2706                vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2707                *vlan_tci = build_tci(pkt_dev->vlan_id,
2708                                      pkt_dev->vlan_cfi,
2709                                      pkt_dev->vlan_p);
2710                vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2711                *vlan_encapsulated_proto = htons(ETH_P_IP);
2712        }
2713
2714        skb->network_header = skb->tail;
2715        skb->transport_header = skb->network_header + sizeof(struct iphdr);
2716        skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2717        skb_set_queue_mapping(skb, queue_map);
2718        skb->priority = pkt_dev->skb_priority;
2719
2720        iph = ip_hdr(skb);
2721        udph = udp_hdr(skb);
2722
2723        memcpy(eth, pkt_dev->hh, 12);
2724        *(__be16 *) & eth[12] = protocol;
2725
2726        /* Eth + IPh + UDPh + mpls */
2727        datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2728                  pkt_dev->pkt_overhead;
2729        if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2730                datalen = sizeof(struct pktgen_hdr);
2731
2732        udph->source = htons(pkt_dev->cur_udp_src);
2733        udph->dest = htons(pkt_dev->cur_udp_dst);
2734        udph->len = htons(datalen + 8); /* DATA + udphdr */
2735        udph->check = 0;        /* No checksum */
2736
2737        iph->ihl = 5;
2738        iph->version = 4;
2739        iph->ttl = 32;
2740        iph->tos = pkt_dev->tos;
2741        iph->protocol = IPPROTO_UDP;    /* UDP */
2742        iph->saddr = pkt_dev->cur_saddr;
2743        iph->daddr = pkt_dev->cur_daddr;
2744        iph->id = htons(pkt_dev->ip_id);
2745        pkt_dev->ip_id++;
2746        iph->frag_off = 0;
2747        iplen = 20 + 8 + datalen;
2748        iph->tot_len = htons(iplen);
2749        iph->check = 0;
2750        iph->check = ip_fast_csum((void *)iph, iph->ihl);
2751        skb->protocol = protocol;
2752        skb->mac_header = (skb->network_header - ETH_HLEN -
2753                           pkt_dev->pkt_overhead);
2754        skb->dev = odev;
2755        skb->pkt_type = PACKET_HOST;
2756        pktgen_finalize_skb(pkt_dev, skb, datalen);
2757
2758#ifdef CONFIG_XFRM
2759        if (!process_ipsec(pkt_dev, skb, protocol))
2760                return NULL;
2761#endif
2762
2763        return skb;
2764}
2765
2766static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2767                                        struct pktgen_dev *pkt_dev)
2768{
2769        struct sk_buff *skb = NULL;
2770        __u8 *eth;
2771        struct udphdr *udph;
2772        int datalen;
2773        struct ipv6hdr *iph;
2774        __be16 protocol = htons(ETH_P_IPV6);
2775        __be32 *mpls;
2776        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2777        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2778        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2779        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2780        u16 queue_map;
2781
2782        if (pkt_dev->nr_labels)
2783                protocol = htons(ETH_P_MPLS_UC);
2784
2785        if (pkt_dev->vlan_id != 0xffff)
2786                protocol = htons(ETH_P_8021Q);
2787
2788        /* Update any of the values, used when we're incrementing various
2789         * fields.
2790         */
2791        mod_cur_headers(pkt_dev);
2792        queue_map = pkt_dev->cur_queue_map;
2793
2794        skb = __netdev_alloc_skb(odev,
2795                                 pkt_dev->cur_pkt_size + 64
2796                                 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2797        if (!skb) {
2798                sprintf(pkt_dev->result, "No memory");
2799                return NULL;
2800        }
2801        prefetchw(skb->data);
2802
2803        skb_reserve(skb, 16);
2804
2805        /*  Reserve for ethernet and IP header  */
2806        eth = (__u8 *) skb_push(skb, 14);
2807        mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2808        if (pkt_dev->nr_labels)
2809                mpls_push(mpls, pkt_dev);
2810
2811        if (pkt_dev->vlan_id != 0xffff) {
2812                if (pkt_dev->svlan_id != 0xffff) {
2813                        svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2814                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2815                                               pkt_dev->svlan_cfi,
2816                                               pkt_dev->svlan_p);
2817                        svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2818                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2819                }
2820                vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2821                *vlan_tci = build_tci(pkt_dev->vlan_id,
2822                                      pkt_dev->vlan_cfi,
2823                                      pkt_dev->vlan_p);
2824                vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2825                *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2826        }
2827
2828        skb->network_header = skb->tail;
2829        skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2830        skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2831        skb_set_queue_mapping(skb, queue_map);
2832        skb->priority = pkt_dev->skb_priority;
2833        iph = ipv6_hdr(skb);
2834        udph = udp_hdr(skb);
2835
2836        memcpy(eth, pkt_dev->hh, 12);
2837        *(__be16 *) &eth[12] = protocol;
2838
2839        /* Eth + IPh + UDPh + mpls */
2840        datalen = pkt_dev->cur_pkt_size - 14 -
2841                  sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2842                  pkt_dev->pkt_overhead;
2843
2844        if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2845                datalen = sizeof(struct pktgen_hdr);
2846                net_info_ratelimited("increased datalen to %d\n", datalen);
2847        }
2848
2849        udph->source = htons(pkt_dev->cur_udp_src);
2850        udph->dest = htons(pkt_dev->cur_udp_dst);
2851        udph->len = htons(datalen + sizeof(struct udphdr));
2852        udph->check = 0;        /* No checksum */
2853
2854        *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
2855
2856        if (pkt_dev->traffic_class) {
2857                /* Version + traffic class + flow (0) */
2858                *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2859        }
2860
2861        iph->hop_limit = 32;
2862
2863        iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2864        iph->nexthdr = IPPROTO_UDP;
2865
2866        iph->daddr = pkt_dev->cur_in6_daddr;
2867        iph->saddr = pkt_dev->cur_in6_saddr;
2868
2869        skb->mac_header = (skb->network_header - ETH_HLEN -
2870                           pkt_dev->pkt_overhead);
2871        skb->protocol = protocol;
2872        skb->dev = odev;
2873        skb->pkt_type = PACKET_HOST;
2874
2875        pktgen_finalize_skb(pkt_dev, skb, datalen);
2876
2877        return skb;
2878}
2879
2880static struct sk_buff *fill_packet(struct net_device *odev,
2881                                   struct pktgen_dev *pkt_dev)
2882{
2883        if (pkt_dev->flags & F_IPV6)
2884                return fill_packet_ipv6(odev, pkt_dev);
2885        else
2886                return fill_packet_ipv4(odev, pkt_dev);
2887}
2888
2889static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2890{
2891        pkt_dev->seq_num = 1;
2892        pkt_dev->idle_acc = 0;
2893        pkt_dev->sofar = 0;
2894        pkt_dev->tx_bytes = 0;
2895        pkt_dev->errors = 0;
2896}
2897
2898/* Set up structure for sending pkts, clear counters */
2899
2900static void pktgen_run(struct pktgen_thread *t)
2901{
2902        struct pktgen_dev *pkt_dev;
2903        int started = 0;
2904
2905        func_enter();
2906
2907        if_lock(t);
2908        list_for_each_entry(pkt_dev, &t->if_list, list) {
2909
2910                /*
2911                 * setup odev and create initial packet.
2912                 */
2913                pktgen_setup_inject(pkt_dev);
2914
2915                if (pkt_dev->odev) {
2916                        pktgen_clear_counters(pkt_dev);
2917                        pkt_dev->running = 1;   /* Cranke yeself! */
2918                        pkt_dev->skb = NULL;
2919                        pkt_dev->started_at =
2920                                pkt_dev->next_tx = ktime_now();
2921
2922                        set_pkt_overhead(pkt_dev);
2923
2924                        strcpy(pkt_dev->result, "Starting");
2925                        started++;
2926                } else
2927                        strcpy(pkt_dev->result, "Error starting");
2928        }
2929        if_unlock(t);
2930        if (started)
2931                t->control &= ~(T_STOP);
2932}
2933
2934static void pktgen_stop_all_threads_ifs(void)
2935{
2936        struct pktgen_thread *t;
2937
2938        func_enter();
2939
2940        mutex_lock(&pktgen_thread_lock);
2941
2942        list_for_each_entry(t, &pktgen_threads, th_list)
2943                t->control |= T_STOP;
2944
2945        mutex_unlock(&pktgen_thread_lock);
2946}
2947
2948static int thread_is_running(const struct pktgen_thread *t)
2949{
2950        const struct pktgen_dev *pkt_dev;
2951
2952        list_for_each_entry(pkt_dev, &t->if_list, list)
2953                if (pkt_dev->running)
2954                        return 1;
2955        return 0;
2956}
2957
2958static int pktgen_wait_thread_run(struct pktgen_thread *t)
2959{
2960        if_lock(t);
2961
2962        while (thread_is_running(t)) {
2963
2964                if_unlock(t);
2965
2966                msleep_interruptible(100);
2967
2968                if (signal_pending(current))
2969                        goto signal;
2970                if_lock(t);
2971        }
2972        if_unlock(t);
2973        return 1;
2974signal:
2975        return 0;
2976}
2977
2978static int pktgen_wait_all_threads_run(void)
2979{
2980        struct pktgen_thread *t;
2981        int sig = 1;
2982
2983        mutex_lock(&pktgen_thread_lock);
2984
2985        list_for_each_entry(t, &pktgen_threads, th_list) {
2986                sig = pktgen_wait_thread_run(t);
2987                if (sig == 0)
2988                        break;
2989        }
2990
2991        if (sig == 0)
2992                list_for_each_entry(t, &pktgen_threads, th_list)
2993                        t->control |= (T_STOP);
2994
2995        mutex_unlock(&pktgen_thread_lock);
2996        return sig;
2997}
2998
2999static void pktgen_run_all_threads(void)
3000{
3001        struct pktgen_thread *t;
3002
3003        func_enter();
3004
3005        mutex_lock(&pktgen_thread_lock);
3006
3007        list_for_each_entry(t, &pktgen_threads, th_list)
3008                t->control |= (T_RUN);
3009
3010        mutex_unlock(&pktgen_thread_lock);
3011
3012        /* Propagate thread->control  */
3013        schedule_timeout_interruptible(msecs_to_jiffies(125));
3014
3015        pktgen_wait_all_threads_run();
3016}
3017
3018static void pktgen_reset_all_threads(void)
3019{
3020        struct pktgen_thread *t;
3021
3022        func_enter();
3023
3024        mutex_lock(&pktgen_thread_lock);
3025
3026        list_for_each_entry(t, &pktgen_threads, th_list)
3027                t->control |= (T_REMDEVALL);
3028
3029        mutex_unlock(&pktgen_thread_lock);
3030
3031        /* Propagate thread->control  */
3032        schedule_timeout_interruptible(msecs_to_jiffies(125));
3033
3034        pktgen_wait_all_threads_run();
3035}
3036
3037static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3038{
3039        __u64 bps, mbps, pps;
3040        char *p = pkt_dev->result;
3041        ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3042                                    pkt_dev->started_at);
3043        ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3044
3045        p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3046                     (unsigned long long)ktime_to_us(elapsed),
3047                     (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3048                     (unsigned long long)ktime_to_us(idle),
3049                     (unsigned long long)pkt_dev->sofar,
3050                     pkt_dev->cur_pkt_size, nr_frags);
3051
3052        pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3053                        ktime_to_ns(elapsed));
3054
3055        bps = pps * 8 * pkt_dev->cur_pkt_size;
3056
3057        mbps = bps;
3058        do_div(mbps, 1000000);
3059        p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
3060                     (unsigned long long)pps,
3061                     (unsigned long long)mbps,
3062                     (unsigned long long)bps,
3063                     (unsigned long long)pkt_dev->errors);
3064}
3065
3066/* Set stopped-at timer, remove from running list, do counters & statistics */
3067static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3068{
3069        int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3070
3071        if (!pkt_dev->running) {
3072                pr_warning("interface: %s is already stopped\n",
3073                           pkt_dev->odevname);
3074                return -EINVAL;
3075        }
3076
3077        kfree_skb(pkt_dev->skb);
3078        pkt_dev->skb = NULL;
3079        pkt_dev->stopped_at = ktime_now();
3080        pkt_dev->running = 0;
3081
3082        show_results(pkt_dev, nr_frags);
3083
3084        return 0;
3085}
3086
3087static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3088{
3089        struct pktgen_dev *pkt_dev, *best = NULL;
3090
3091        if_lock(t);
3092
3093        list_for_each_entry(pkt_dev, &t->if_list, list) {
3094                if (!pkt_dev->running)
3095                        continue;
3096                if (best == NULL)
3097                        best = pkt_dev;
3098                else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3099                        best = pkt_dev;
3100        }
3101        if_unlock(t);
3102        return best;
3103}
3104
3105static void pktgen_stop(struct pktgen_thread *t)
3106{
3107        struct pktgen_dev *pkt_dev;
3108
3109        func_enter();
3110
3111        if_lock(t);
3112
3113        list_for_each_entry(pkt_dev, &t->if_list, list) {
3114                pktgen_stop_device(pkt_dev);
3115        }
3116
3117        if_unlock(t);
3118}
3119
3120/*
3121 * one of our devices needs to be removed - find it
3122 * and remove it
3123 */
3124static void pktgen_rem_one_if(struct pktgen_thread *t)
3125{
3126        struct list_head *q, *n;
3127        struct pktgen_dev *cur;
3128
3129        func_enter();
3130
3131        if_lock(t);
3132
3133        list_for_each_safe(q, n, &t->if_list) {
3134                cur = list_entry(q, struct pktgen_dev, list);
3135
3136                if (!cur->removal_mark)
3137                        continue;
3138
3139                kfree_skb(cur->skb);
3140                cur->skb = NULL;
3141
3142                pktgen_remove_device(t, cur);
3143
3144                break;
3145        }
3146
3147        if_unlock(t);
3148}
3149
3150static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3151{
3152        struct list_head *q, *n;
3153        struct pktgen_dev *cur;
3154
3155        func_enter();
3156
3157        /* Remove all devices, free mem */
3158
3159        if_lock(t);
3160
3161        list_for_each_safe(q, n, &t->if_list) {
3162                cur = list_entry(q, struct pktgen_dev, list);
3163
3164                kfree_skb(cur->skb);
3165                cur->skb = NULL;
3166
3167                pktgen_remove_device(t, cur);
3168        }
3169
3170        if_unlock(t);
3171}
3172
3173static void pktgen_rem_thread(struct pktgen_thread *t)
3174{
3175        /* Remove from the thread list */
3176
3177        remove_proc_entry(t->tsk->comm, pg_proc_dir);
3178
3179}
3180
3181static void pktgen_resched(struct pktgen_dev *pkt_dev)
3182{
3183        ktime_t idle_start = ktime_now();
3184        schedule();
3185        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3186}
3187
3188static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3189{
3190        ktime_t idle_start = ktime_now();
3191
3192        while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3193                if (signal_pending(current))
3194                        break;
3195
3196                if (need_resched())
3197                        pktgen_resched(pkt_dev);
3198                else
3199                        cpu_relax();
3200        }
3201        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3202}
3203
3204static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3205{
3206        struct net_device *odev = pkt_dev->odev;
3207        netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3208                = odev->netdev_ops->ndo_start_xmit;
3209        struct netdev_queue *txq;
3210        u16 queue_map;
3211        int ret;
3212
3213        /* If device is offline, then don't send */
3214        if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3215                pktgen_stop_device(pkt_dev);
3216                return;
3217        }
3218
3219        /* This is max DELAY, this has special meaning of
3220         * "never transmit"
3221         */
3222        if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3223                pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3224                return;
3225        }
3226
3227        /* If no skb or clone count exhausted then get new one */
3228        if (!pkt_dev->skb || (pkt_dev->last_ok &&
3229                              ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3230                /* build a new pkt */
3231                kfree_skb(pkt_dev->skb);
3232
3233                pkt_dev->skb = fill_packet(odev, pkt_dev);
3234                if (pkt_dev->skb == NULL) {
3235                        pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3236                        schedule();
3237                        pkt_dev->clone_count--; /* back out increment, OOM */
3238                        return;
3239                }
3240                pkt_dev->last_pkt_size = pkt_dev->skb->len;
3241                pkt_dev->allocated_skbs++;
3242                pkt_dev->clone_count = 0;       /* reset counter */
3243        }
3244
3245        if (pkt_dev->delay && pkt_dev->last_ok)
3246                spin(pkt_dev, pkt_dev->next_tx);
3247
3248        queue_map = skb_get_queue_mapping(pkt_dev->skb);
3249        txq = netdev_get_tx_queue(odev, queue_map);
3250
3251        __netif_tx_lock_bh(txq);
3252
3253        if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3254                ret = NETDEV_TX_BUSY;
3255                pkt_dev->last_ok = 0;
3256                goto unlock;
3257        }
3258        atomic_inc(&(pkt_dev->skb->users));
3259        ret = (*xmit)(pkt_dev->skb, odev);
3260
3261        switch (ret) {
3262        case NETDEV_TX_OK:
3263                txq_trans_update(txq);
3264                pkt_dev->last_ok = 1;
3265                pkt_dev->sofar++;
3266                pkt_dev->seq_num++;
3267                pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3268                break;
3269        case NET_XMIT_DROP:
3270        case NET_XMIT_CN:
3271        case NET_XMIT_POLICED:
3272                /* skb has been consumed */
3273                pkt_dev->errors++;
3274                break;
3275        default: /* Drivers are not supposed to return other values! */
3276                net_info_ratelimited("%s xmit error: %d\n",
3277                                     pkt_dev->odevname, ret);
3278                pkt_dev->errors++;
3279                /* fallthru */
3280        case NETDEV_TX_LOCKED:
3281        case NETDEV_TX_BUSY:
3282                /* Retry it next time */
3283                atomic_dec(&(pkt_dev->skb->users));
3284                pkt_dev->last_ok = 0;
3285        }
3286unlock:
3287        __netif_tx_unlock_bh(txq);
3288
3289        /* If pkt_dev->count is zero, then run forever */
3290        if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3291                pktgen_wait_for_skb(pkt_dev);
3292
3293                /* Done with this */
3294                pktgen_stop_device(pkt_dev);
3295        }
3296}
3297
3298/*
3299 * Main loop of the thread goes here
3300 */
3301
3302static int pktgen_thread_worker(void *arg)
3303{
3304        DEFINE_WAIT(wait);
3305        struct pktgen_thread *t = arg;
3306        struct pktgen_dev *pkt_dev = NULL;
3307        int cpu = t->cpu;
3308
3309        BUG_ON(smp_processor_id() != cpu);
3310
3311        init_waitqueue_head(&t->queue);
3312        complete(&t->start_done);
3313
3314        pr_debug("starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
3315
3316        set_current_state(TASK_INTERRUPTIBLE);
3317
3318        set_freezable();
3319
3320        while (!kthread_should_stop()) {
3321                pkt_dev = next_to_run(t);
3322
3323                if (unlikely(!pkt_dev && t->control == 0)) {
3324                        if (pktgen_exiting)
3325                                break;
3326                        wait_event_interruptible_timeout(t->queue,
3327                                                         t->control != 0,
3328                                                         HZ/10);
3329                        try_to_freeze();
3330                        continue;
3331                }
3332
3333                __set_current_state(TASK_RUNNING);
3334
3335                if (likely(pkt_dev)) {
3336                        pktgen_xmit(pkt_dev);
3337
3338                        if (need_resched())
3339                                pktgen_resched(pkt_dev);
3340                        else
3341                                cpu_relax();
3342                }
3343
3344                if (t->control & T_STOP) {
3345                        pktgen_stop(t);
3346                        t->control &= ~(T_STOP);
3347                }
3348
3349                if (t->control & T_RUN) {
3350                        pktgen_run(t);
3351                        t->control &= ~(T_RUN);
3352                }
3353
3354                if (t->control & T_REMDEVALL) {
3355                        pktgen_rem_all_ifs(t);
3356                        t->control &= ~(T_REMDEVALL);
3357                }
3358
3359                if (t->control & T_REMDEV) {
3360                        pktgen_rem_one_if(t);
3361                        t->control &= ~(T_REMDEV);
3362                }
3363
3364                try_to_freeze();
3365
3366                set_current_state(TASK_INTERRUPTIBLE);
3367        }
3368
3369        pr_debug("%s stopping all device\n", t->tsk->comm);
3370        pktgen_stop(t);
3371
3372        pr_debug("%s removing all device\n", t->tsk->comm);
3373        pktgen_rem_all_ifs(t);
3374
3375        pr_debug("%s removing thread\n", t->tsk->comm);
3376        pktgen_rem_thread(t);
3377
3378        /* Wait for kthread_stop */
3379        while (!kthread_should_stop()) {
3380                set_current_state(TASK_INTERRUPTIBLE);
3381                schedule();
3382        }
3383        __set_current_state(TASK_RUNNING);
3384
3385        return 0;
3386}
3387
3388static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3389                                          const char *ifname, bool exact)
3390{
3391        struct pktgen_dev *p, *pkt_dev = NULL;
3392        size_t len = strlen(ifname);
3393
3394        if_lock(t);
3395        list_for_each_entry(p, &t->if_list, list)
3396                if (strncmp(p->odevname, ifname, len) == 0) {
3397                        if (p->odevname[len]) {
3398                                if (exact || p->odevname[len] != '@')
3399                                        continue;
3400                        }
3401                        pkt_dev = p;
3402                        break;
3403                }
3404
3405        if_unlock(t);
3406        pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3407        return pkt_dev;
3408}
3409
3410/*
3411 * Adds a dev at front of if_list.
3412 */
3413
3414static int add_dev_to_thread(struct pktgen_thread *t,
3415                             struct pktgen_dev *pkt_dev)
3416{
3417        int rv = 0;
3418
3419        if_lock(t);
3420
3421        if (pkt_dev->pg_thread) {
3422                pr_err("ERROR: already assigned to a thread\n");
3423                rv = -EBUSY;
3424                goto out;
3425        }
3426
3427        list_add(&pkt_dev->list, &t->if_list);
3428        pkt_dev->pg_thread = t;
3429        pkt_dev->running = 0;
3430
3431out:
3432        if_unlock(t);
3433        return rv;
3434}
3435
3436/* Called under thread lock */
3437
3438static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3439{
3440        struct pktgen_dev *pkt_dev;
3441        int err;
3442        int node = cpu_to_node(t->cpu);
3443
3444        /* We don't allow a device to be on several threads */
3445
3446        pkt_dev = __pktgen_NN_threads(ifname, FIND);
3447        if (pkt_dev) {
3448                pr_err("ERROR: interface already used\n");
3449                return -EBUSY;
3450        }
3451
3452        pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3453        if (!pkt_dev)
3454                return -ENOMEM;
3455
3456        strcpy(pkt_dev->odevname, ifname);
3457        pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3458                                      node);
3459        if (pkt_dev->flows == NULL) {
3460                kfree(pkt_dev);
3461                return -ENOMEM;
3462        }
3463
3464        pkt_dev->removal_mark = 0;
3465        pkt_dev->nfrags = 0;
3466        pkt_dev->delay = pg_delay_d;
3467        pkt_dev->count = pg_count_d;
3468        pkt_dev->sofar = 0;
3469        pkt_dev->udp_src_min = 9;       /* sink port */
3470        pkt_dev->udp_src_max = 9;
3471        pkt_dev->udp_dst_min = 9;
3472        pkt_dev->udp_dst_max = 9;
3473        pkt_dev->vlan_p = 0;
3474        pkt_dev->vlan_cfi = 0;
3475        pkt_dev->vlan_id = 0xffff;
3476        pkt_dev->svlan_p = 0;
3477        pkt_dev->svlan_cfi = 0;
3478        pkt_dev->svlan_id = 0xffff;
3479        pkt_dev->node = -1;
3480
3481        err = pktgen_setup_dev(pkt_dev, ifname);
3482        if (err)
3483                goto out1;
3484        if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3485                pkt_dev->clone_skb = pg_clone_skb_d;
3486
3487        pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3488                                          &pktgen_if_fops, pkt_dev);
3489        if (!pkt_dev->entry) {
3490                pr_err("cannot create %s/%s procfs entry\n",
3491                       PG_PROC_DIR, ifname);
3492                err = -EINVAL;
3493                goto out2;
3494        }
3495#ifdef CONFIG_XFRM
3496        pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3497        pkt_dev->ipsproto = IPPROTO_ESP;
3498#endif
3499
3500        return add_dev_to_thread(t, pkt_dev);
3501out2:
3502        dev_put(pkt_dev->odev);
3503out1:
3504#ifdef CONFIG_XFRM
3505        free_SAs(pkt_dev);
3506#endif
3507        vfree(pkt_dev->flows);
3508        kfree(pkt_dev);
3509        return err;
3510}
3511
3512static int __init pktgen_create_thread(int cpu)
3513{
3514        struct pktgen_thread *t;
3515        struct proc_dir_entry *pe;
3516        struct task_struct *p;
3517
3518        t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3519                         cpu_to_node(cpu));
3520        if (!t) {
3521                pr_err("ERROR: out of memory, can't create new thread\n");
3522                return -ENOMEM;
3523        }
3524
3525        spin_lock_init(&t->if_lock);
3526        t->cpu = cpu;
3527
3528        INIT_LIST_HEAD(&t->if_list);
3529
3530        list_add_tail(&t->th_list, &pktgen_threads);
3531        init_completion(&t->start_done);
3532
3533        p = kthread_create_on_node(pktgen_thread_worker,
3534                                   t,
3535                                   cpu_to_node(cpu),
3536                                   "kpktgend_%d", cpu);
3537        if (IS_ERR(p)) {
3538                pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3539                list_del(&t->th_list);
3540                kfree(t);
3541                return PTR_ERR(p);
3542        }
3543        kthread_bind(p, cpu);
3544        t->tsk = p;
3545
3546        pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3547                              &pktgen_thread_fops, t);
3548        if (!pe) {
3549                pr_err("cannot create %s/%s procfs entry\n",
3550                       PG_PROC_DIR, t->tsk->comm);
3551                kthread_stop(p);
3552                list_del(&t->th_list);
3553                kfree(t);
3554                return -EINVAL;
3555        }
3556
3557        wake_up_process(p);
3558        wait_for_completion(&t->start_done);
3559
3560        return 0;
3561}
3562
3563/*
3564 * Removes a device from the thread if_list.
3565 */
3566static void _rem_dev_from_if_list(struct pktgen_thread *t,
3567                                  struct pktgen_dev *pkt_dev)
3568{
3569        struct list_head *q, *n;
3570        struct pktgen_dev *p;
3571
3572        list_for_each_safe(q, n, &t->if_list) {
3573                p = list_entry(q, struct pktgen_dev, list);
3574                if (p == pkt_dev)
3575                        list_del(&p->list);
3576        }
3577}
3578
3579static int pktgen_remove_device(struct pktgen_thread *t,
3580                                struct pktgen_dev *pkt_dev)
3581{
3582
3583        pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3584
3585        if (pkt_dev->running) {
3586                pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3587                pktgen_stop_device(pkt_dev);
3588        }
3589
3590        /* Dis-associate from the interface */
3591
3592        if (pkt_dev->odev) {
3593                dev_put(pkt_dev->odev);
3594                pkt_dev->odev = NULL;
3595        }
3596
3597        /* And update the thread if_list */
3598
3599        _rem_dev_from_if_list(t, pkt_dev);
3600
3601        if (pkt_dev->entry)
3602                remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3603
3604#ifdef CONFIG_XFRM
3605        free_SAs(pkt_dev);
3606#endif
3607        vfree(pkt_dev->flows);
3608        if (pkt_dev->page)
3609                put_page(pkt_dev->page);
3610        kfree(pkt_dev);
3611        return 0;
3612}
3613
3614static int __init pg_init(void)
3615{
3616        int cpu;
3617        struct proc_dir_entry *pe;
3618        int ret = 0;
3619
3620        pr_info("%s", version);
3621
3622        pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3623        if (!pg_proc_dir)
3624                return -ENODEV;
3625
3626        pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3627        if (pe == NULL) {
3628                pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3629                ret = -EINVAL;
3630                goto remove_dir;
3631        }
3632
3633        register_netdevice_notifier(&pktgen_notifier_block);
3634
3635        for_each_online_cpu(cpu) {
3636                int err;
3637
3638                err = pktgen_create_thread(cpu);
3639                if (err)
3640                        pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3641                                   cpu, err);
3642        }
3643
3644        if (list_empty(&pktgen_threads)) {
3645                pr_err("ERROR: Initialization failed for all threads\n");
3646                ret = -ENODEV;
3647                goto unregister;
3648        }
3649
3650        return 0;
3651
3652 unregister:
3653        unregister_netdevice_notifier(&pktgen_notifier_block);
3654        remove_proc_entry(PGCTRL, pg_proc_dir);
3655 remove_dir:
3656        proc_net_remove(&init_net, PG_PROC_DIR);
3657        return ret;
3658}
3659
3660static void __exit pg_cleanup(void)
3661{
3662        struct pktgen_thread *t;
3663        struct list_head *q, *n;
3664        LIST_HEAD(list);
3665
3666        /* Stop all interfaces & threads */
3667        pktgen_exiting = true;
3668
3669        mutex_lock(&pktgen_thread_lock);
3670        list_splice_init(&pktgen_threads, &list);
3671        mutex_unlock(&pktgen_thread_lock);
3672
3673        list_for_each_safe(q, n, &list) {
3674                t = list_entry(q, struct pktgen_thread, th_list);
3675                list_del(&t->th_list);
3676                kthread_stop(t->tsk);
3677                kfree(t);
3678        }
3679
3680        /* Un-register us from receiving netdevice events */
3681        unregister_netdevice_notifier(&pktgen_notifier_block);
3682
3683        /* Clean up proc file system */
3684        remove_proc_entry(PGCTRL, pg_proc_dir);
3685        proc_net_remove(&init_net, PG_PROC_DIR);
3686}
3687
3688module_init(pg_init);
3689module_exit(pg_cleanup);
3690
3691MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3692MODULE_DESCRIPTION("Packet Generator tool");
3693MODULE_LICENSE("GPL");
3694MODULE_VERSION(VERSION);
3695module_param(pg_count_d, int, 0);
3696MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3697module_param(pg_delay_d, int, 0);
3698MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3699module_param(pg_clone_skb_d, int, 0);
3700MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3701module_param(debug, int, 0);
3702MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
3703
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