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;       /* = ETH_ZLEN; */
 252        int max_pkt_size;       /* = ETH_ZLEN; */
 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
 452static unsigned int scan_ip6(const char *s, char ip[16]);
 453
 454/* Module parameters, defaults. */
 455static int pg_count_d __read_mostly = 1000;
 456static int pg_delay_d __read_mostly;
 457static int pg_clone_skb_d  __read_mostly;
 458static int debug  __read_mostly;
 459
 460static DEFINE_MUTEX(pktgen_thread_lock);
 461static LIST_HEAD(pktgen_threads);
 462
 463static struct notifier_block pktgen_notifier_block = {
 464        .notifier_call = pktgen_device_event,
 465};
 466
 467/*
 468 * /proc handling functions
 469 *
 470 */
 471
 472static int pgctrl_show(struct seq_file *seq, void *v)
 473{
 474        seq_puts(seq, version);
 475        return 0;
 476}
 477
 478static ssize_t pgctrl_write(struct file *file, const char __user *buf,
 479                            size_t count, loff_t *ppos)
 480{
 481        int err = 0;
 482        char data[128];
 483
 484        if (!capable(CAP_NET_ADMIN)) {
 485                err = -EPERM;
 486                goto out;
 487        }
 488
 489        if (count > sizeof(data))
 490                count = sizeof(data);
 491
 492        if (copy_from_user(data, buf, count)) {
 493                err = -EFAULT;
 494                goto out;
 495        }
 496        data[count - 1] = 0;    /* Make string */
 497
 498        if (!strcmp(data, "stop"))
 499                pktgen_stop_all_threads_ifs();
 500
 501        else if (!strcmp(data, "start"))
 502                pktgen_run_all_threads();
 503
 504        else if (!strcmp(data, "reset"))
 505                pktgen_reset_all_threads();
 506
 507        else
 508                pr_warning("Unknown command: %s\n", data);
 509
 510        err = count;
 511
 512out:
 513        return err;
 514}
 515
 516static int pgctrl_open(struct inode *inode, struct file *file)
 517{
 518        return single_open(file, pgctrl_show, PDE(inode)->data);
 519}
 520
 521static const struct file_operations pktgen_fops = {
 522        .owner   = THIS_MODULE,
 523        .open    = pgctrl_open,
 524        .read    = seq_read,
 525        .llseek  = seq_lseek,
 526        .write   = pgctrl_write,
 527        .release = single_release,
 528};
 529
 530static int pktgen_if_show(struct seq_file *seq, void *v)
 531{
 532        const struct pktgen_dev *pkt_dev = seq->private;
 533        ktime_t stopped;
 534        u64 idle;
 535
 536        seq_printf(seq,
 537                   "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
 538                   (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
 539                   pkt_dev->max_pkt_size);
 540
 541        seq_printf(seq,
 542                   "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
 543                   pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
 544                   pkt_dev->clone_skb, pkt_dev->odevname);
 545
 546        seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
 547                   pkt_dev->lflow);
 548
 549        seq_printf(seq,
 550                   "     queue_map_min: %u  queue_map_max: %u\n",
 551                   pkt_dev->queue_map_min,
 552                   pkt_dev->queue_map_max);
 553
 554        if (pkt_dev->skb_priority)
 555                seq_printf(seq, "     skb_priority: %u\n",
 556                           pkt_dev->skb_priority);
 557
 558        if (pkt_dev->flags & F_IPV6) {
 559                seq_printf(seq,
 560                           "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
 561                           "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
 562                           &pkt_dev->in6_saddr,
 563                           &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
 564                           &pkt_dev->in6_daddr,
 565                           &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
 566        } else {
 567                seq_printf(seq,
 568                           "     dst_min: %s  dst_max: %s\n",
 569                           pkt_dev->dst_min, pkt_dev->dst_max);
 570                seq_printf(seq,
 571                           "        src_min: %s  src_max: %s\n",
 572                           pkt_dev->src_min, pkt_dev->src_max);
 573        }
 574
 575        seq_puts(seq, "     src_mac: ");
 576
 577        seq_printf(seq, "%pM ",
 578                   is_zero_ether_addr(pkt_dev->src_mac) ?
 579                             pkt_dev->odev->dev_addr : pkt_dev->src_mac);
 580
 581        seq_printf(seq, "dst_mac: ");
 582        seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
 583
 584        seq_printf(seq,
 585                   "     udp_src_min: %d  udp_src_max: %d"
 586                   "  udp_dst_min: %d  udp_dst_max: %d\n",
 587                   pkt_dev->udp_src_min, pkt_dev->udp_src_max,
 588                   pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
 589
 590        seq_printf(seq,
 591                   "     src_mac_count: %d  dst_mac_count: %d\n",
 592                   pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
 593
 594        if (pkt_dev->nr_labels) {
 595                unsigned int i;
 596                seq_printf(seq, "     mpls: ");
 597                for (i = 0; i < pkt_dev->nr_labels; i++)
 598                        seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
 599                                   i == pkt_dev->nr_labels-1 ? "\n" : ", ");
 600        }
 601
 602        if (pkt_dev->vlan_id != 0xffff)
 603                seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 604                           pkt_dev->vlan_id, pkt_dev->vlan_p,
 605                           pkt_dev->vlan_cfi);
 606
 607        if (pkt_dev->svlan_id != 0xffff)
 608                seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 609                           pkt_dev->svlan_id, pkt_dev->svlan_p,
 610                           pkt_dev->svlan_cfi);
 611
 612        if (pkt_dev->tos)
 613                seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
 614
 615        if (pkt_dev->traffic_class)
 616                seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
 617
 618        if (pkt_dev->node >= 0)
 619                seq_printf(seq, "     node: %d\n", pkt_dev->node);
 620
 621        seq_printf(seq, "     Flags: ");
 622
 623        if (pkt_dev->flags & F_IPV6)
 624                seq_printf(seq, "IPV6  ");
 625
 626        if (pkt_dev->flags & F_IPSRC_RND)
 627                seq_printf(seq, "IPSRC_RND  ");
 628
 629        if (pkt_dev->flags & F_IPDST_RND)
 630                seq_printf(seq, "IPDST_RND  ");
 631
 632        if (pkt_dev->flags & F_TXSIZE_RND)
 633                seq_printf(seq, "TXSIZE_RND  ");
 634
 635        if (pkt_dev->flags & F_UDPSRC_RND)
 636                seq_printf(seq, "UDPSRC_RND  ");
 637
 638        if (pkt_dev->flags & F_UDPDST_RND)
 639                seq_printf(seq, "UDPDST_RND  ");
 640
 641        if (pkt_dev->flags & F_MPLS_RND)
 642                seq_printf(seq,  "MPLS_RND  ");
 643
 644        if (pkt_dev->flags & F_QUEUE_MAP_RND)
 645                seq_printf(seq,  "QUEUE_MAP_RND  ");
 646
 647        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
 648                seq_printf(seq,  "QUEUE_MAP_CPU  ");
 649
 650        if (pkt_dev->cflows) {
 651                if (pkt_dev->flags & F_FLOW_SEQ)
 652                        seq_printf(seq,  "FLOW_SEQ  "); /*in sequence flows*/
 653                else
 654                        seq_printf(seq,  "FLOW_RND  ");
 655        }
 656
 657#ifdef CONFIG_XFRM
 658        if (pkt_dev->flags & F_IPSEC_ON)
 659                seq_printf(seq,  "IPSEC  ");
 660#endif
 661
 662        if (pkt_dev->flags & F_MACSRC_RND)
 663                seq_printf(seq, "MACSRC_RND  ");
 664
 665        if (pkt_dev->flags & F_MACDST_RND)
 666                seq_printf(seq, "MACDST_RND  ");
 667
 668        if (pkt_dev->flags & F_VID_RND)
 669                seq_printf(seq, "VID_RND  ");
 670
 671        if (pkt_dev->flags & F_SVID_RND)
 672                seq_printf(seq, "SVID_RND  ");
 673
 674        if (pkt_dev->flags & F_NODE)
 675                seq_printf(seq, "NODE_ALLOC  ");
 676
 677        seq_puts(seq, "\n");
 678
 679        /* not really stopped, more like last-running-at */
 680        stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
 681        idle = pkt_dev->idle_acc;
 682        do_div(idle, NSEC_PER_USEC);
 683
 684        seq_printf(seq,
 685                   "Current:\n     pkts-sofar: %llu  errors: %llu\n",
 686                   (unsigned long long)pkt_dev->sofar,
 687                   (unsigned long long)pkt_dev->errors);
 688
 689        seq_printf(seq,
 690                   "     started: %lluus  stopped: %lluus idle: %lluus\n",
 691                   (unsigned long long) ktime_to_us(pkt_dev->started_at),
 692                   (unsigned long long) ktime_to_us(stopped),
 693                   (unsigned long long) idle);
 694
 695        seq_printf(seq,
 696                   "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
 697                   pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
 698                   pkt_dev->cur_src_mac_offset);
 699
 700        if (pkt_dev->flags & F_IPV6) {
 701                seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
 702                                &pkt_dev->cur_in6_saddr,
 703                                &pkt_dev->cur_in6_daddr);
 704        } else
 705                seq_printf(seq, "     cur_saddr: 0x%x  cur_daddr: 0x%x\n",
 706                           pkt_dev->cur_saddr, pkt_dev->cur_daddr);
 707
 708        seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
 709                   pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
 710
 711        seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
 712
 713        seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
 714
 715        if (pkt_dev->result[0])
 716                seq_printf(seq, "Result: %s\n", pkt_dev->result);
 717        else
 718                seq_printf(seq, "Result: Idle\n");
 719
 720        return 0;
 721}
 722
 723
 724static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
 725                     __u32 *num)
 726{
 727        int i = 0;
 728        *num = 0;
 729
 730        for (; i < maxlen; i++) {
 731                int value;
 732                char c;
 733                *num <<= 4;
 734                if (get_user(c, &user_buffer[i]))
 735                        return -EFAULT;
 736                value = hex_to_bin(c);
 737                if (value >= 0)
 738                        *num |= value;
 739                else
 740                        break;
 741        }
 742        return i;
 743}
 744
 745static int count_trail_chars(const char __user * user_buffer,
 746                             unsigned int maxlen)
 747{
 748        int i;
 749
 750        for (i = 0; i < maxlen; i++) {
 751                char c;
 752                if (get_user(c, &user_buffer[i]))
 753                        return -EFAULT;
 754                switch (c) {
 755                case '\"':
 756                case '\n':
 757                case '\r':
 758                case '\t':
 759                case ' ':
 760                case '=':
 761                        break;
 762                default:
 763                        goto done;
 764                }
 765        }
 766done:
 767        return i;
 768}
 769
 770static long num_arg(const char __user *user_buffer, unsigned long maxlen,
 771                                unsigned long *num)
 772{
 773        int i;
 774        *num = 0;
 775
 776        for (i = 0; i < maxlen; i++) {
 777                char c;
 778                if (get_user(c, &user_buffer[i]))
 779                        return -EFAULT;
 780                if ((c >= '0') && (c <= '9')) {
 781                        *num *= 10;
 782                        *num += c - '0';
 783                } else
 784                        break;
 785        }
 786        return i;
 787}
 788
 789static int strn_len(const char __user * user_buffer, unsigned int maxlen)
 790{
 791        int i;
 792
 793        for (i = 0; i < maxlen; i++) {
 794                char c;
 795                if (get_user(c, &user_buffer[i]))
 796                        return -EFAULT;
 797                switch (c) {
 798                case '\"':
 799                case '\n':
 800                case '\r':
 801                case '\t':
 802                case ' ':
 803                        goto done_str;
 804                        break;
 805                default:
 806                        break;
 807                }
 808        }
 809done_str:
 810        return i;
 811}
 812
 813static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
 814{
 815        unsigned int n = 0;
 816        char c;
 817        ssize_t i = 0;
 818        int len;
 819
 820        pkt_dev->nr_labels = 0;
 821        do {
 822                __u32 tmp;
 823                len = hex32_arg(&buffer[i], 8, &tmp);
 824                if (len <= 0)
 825                        return len;
 826                pkt_dev->labels[n] = htonl(tmp);
 827                if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
 828                        pkt_dev->flags |= F_MPLS_RND;
 829                i += len;
 830                if (get_user(c, &buffer[i]))
 831                        return -EFAULT;
 832                i++;
 833                n++;
 834                if (n >= MAX_MPLS_LABELS)
 835                        return -E2BIG;
 836        } while (c == ',');
 837
 838        pkt_dev->nr_labels = n;
 839        return i;
 840}
 841
 842static ssize_t pktgen_if_write(struct file *file,
 843                               const char __user * user_buffer, size_t count,
 844                               loff_t * offset)
 845{
 846        struct seq_file *seq = file->private_data;
 847        struct pktgen_dev *pkt_dev = seq->private;
 848        int i, max, len;
 849        char name[16], valstr[32];
 850        unsigned long value = 0;
 851        char *pg_result = NULL;
 852        int tmp = 0;
 853        char buf[128];
 854
 855        pg_result = &(pkt_dev->result[0]);
 856
 857        if (count < 1) {
 858                pr_warning("wrong command format\n");
 859                return -EINVAL;
 860        }
 861
 862        max = count;
 863        tmp = count_trail_chars(user_buffer, max);
 864        if (tmp < 0) {
 865                pr_warning("illegal format\n");
 866                return tmp;
 867        }
 868        i = tmp;
 869
 870        /* Read variable name */
 871
 872        len = strn_len(&user_buffer[i], sizeof(name) - 1);
 873        if (len < 0)
 874                return len;
 875
 876        memset(name, 0, sizeof(name));
 877        if (copy_from_user(name, &user_buffer[i], len))
 878                return -EFAULT;
 879        i += len;
 880
 881        max = count - i;
 882        len = count_trail_chars(&user_buffer[i], max);
 883        if (len < 0)
 884                return len;
 885
 886        i += len;
 887
 888        if (debug) {
 889                size_t copy = min_t(size_t, count, 1023);
 890                char tb[copy + 1];
 891                if (copy_from_user(tb, user_buffer, copy))
 892                        return -EFAULT;
 893                tb[copy] = 0;
 894                pr_debug("%s,%lu  buffer -:%s:-\n",
 895                         name, (unsigned long)count, tb);
 896        }
 897
 898        if (!strcmp(name, "min_pkt_size")) {
 899                len = num_arg(&user_buffer[i], 10, &value);
 900                if (len < 0)
 901                        return len;
 902
 903                i += len;
 904                if (value < 14 + 20 + 8)
 905                        value = 14 + 20 + 8;
 906                if (value != pkt_dev->min_pkt_size) {
 907                        pkt_dev->min_pkt_size = value;
 908                        pkt_dev->cur_pkt_size = value;
 909                }
 910                sprintf(pg_result, "OK: min_pkt_size=%u",
 911                        pkt_dev->min_pkt_size);
 912                return count;
 913        }
 914
 915        if (!strcmp(name, "max_pkt_size")) {
 916                len = num_arg(&user_buffer[i], 10, &value);
 917                if (len < 0)
 918                        return len;
 919
 920                i += len;
 921                if (value < 14 + 20 + 8)
 922                        value = 14 + 20 + 8;
 923                if (value != pkt_dev->max_pkt_size) {
 924                        pkt_dev->max_pkt_size = value;
 925                        pkt_dev->cur_pkt_size = value;
 926                }
 927                sprintf(pg_result, "OK: max_pkt_size=%u",
 928                        pkt_dev->max_pkt_size);
 929                return count;
 930        }
 931
 932        /* Shortcut for min = max */
 933
 934        if (!strcmp(name, "pkt_size")) {
 935                len = num_arg(&user_buffer[i], 10, &value);
 936                if (len < 0)
 937                        return len;
 938
 939                i += len;
 940                if (value < 14 + 20 + 8)
 941                        value = 14 + 20 + 8;
 942                if (value != pkt_dev->min_pkt_size) {
 943                        pkt_dev->min_pkt_size = value;
 944                        pkt_dev->max_pkt_size = value;
 945                        pkt_dev->cur_pkt_size = value;
 946                }
 947                sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
 948                return count;
 949        }
 950
 951        if (!strcmp(name, "debug")) {
 952                len = num_arg(&user_buffer[i], 10, &value);
 953                if (len < 0)
 954                        return len;
 955
 956                i += len;
 957                debug = value;
 958                sprintf(pg_result, "OK: debug=%u", debug);
 959                return count;
 960        }
 961
 962        if (!strcmp(name, "frags")) {
 963                len = num_arg(&user_buffer[i], 10, &value);
 964                if (len < 0)
 965                        return len;
 966
 967                i += len;
 968                pkt_dev->nfrags = value;
 969                sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
 970                return count;
 971        }
 972        if (!strcmp(name, "delay")) {
 973                len = num_arg(&user_buffer[i], 10, &value);
 974                if (len < 0)
 975                        return len;
 976
 977                i += len;
 978                if (value == 0x7FFFFFFF)
 979                        pkt_dev->delay = ULLONG_MAX;
 980                else
 981                        pkt_dev->delay = (u64)value;
 982
 983                sprintf(pg_result, "OK: delay=%llu",
 984                        (unsigned long long) pkt_dev->delay);
 985                return count;
 986        }
 987        if (!strcmp(name, "rate")) {
 988                len = num_arg(&user_buffer[i], 10, &value);
 989                if (len < 0)
 990                        return len;
 991
 992                i += len;
 993                if (!value)
 994                        return len;
 995                pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
 996                if (debug)
 997                        pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
 998
 999                sprintf(pg_result, "OK: rate=%lu", value);
1000                return count;
1001        }
1002        if (!strcmp(name, "ratep")) {
1003                len = num_arg(&user_buffer[i], 10, &value);
1004                if (len < 0)
1005                        return len;
1006
1007                i += len;
1008                if (!value)
1009                        return len;
1010                pkt_dev->delay = NSEC_PER_SEC/value;
1011                if (debug)
1012                        pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013
1014                sprintf(pg_result, "OK: rate=%lu", value);
1015                return count;
1016        }
1017        if (!strcmp(name, "udp_src_min")) {
1018                len = num_arg(&user_buffer[i], 10, &value);
1019                if (len < 0)
1020                        return len;
1021
1022                i += len;
1023                if (value != pkt_dev->udp_src_min) {
1024                        pkt_dev->udp_src_min = value;
1025                        pkt_dev->cur_udp_src = value;
1026                }
1027                sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1028                return count;
1029        }
1030        if (!strcmp(name, "udp_dst_min")) {
1031                len = num_arg(&user_buffer[i], 10, &value);
1032                if (len < 0)
1033                        return len;
1034
1035                i += len;
1036                if (value != pkt_dev->udp_dst_min) {
1037                        pkt_dev->udp_dst_min = value;
1038                        pkt_dev->cur_udp_dst = value;
1039                }
1040                sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1041                return count;
1042        }
1043        if (!strcmp(name, "udp_src_max")) {
1044                len = num_arg(&user_buffer[i], 10, &value);
1045                if (len < 0)
1046                        return len;
1047
1048                i += len;
1049                if (value != pkt_dev->udp_src_max) {
1050                        pkt_dev->udp_src_max = value;
1051                        pkt_dev->cur_udp_src = value;
1052                }
1053                sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1054                return count;
1055        }
1056        if (!strcmp(name, "udp_dst_max")) {
1057                len = num_arg(&user_buffer[i], 10, &value);
1058                if (len < 0)
1059                        return len;
1060
1061                i += len;
1062                if (value != pkt_dev->udp_dst_max) {
1063                        pkt_dev->udp_dst_max = value;
1064                        pkt_dev->cur_udp_dst = value;
1065                }
1066                sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1067                return count;
1068        }
1069        if (!strcmp(name, "clone_skb")) {
1070                len = num_arg(&user_buffer[i], 10, &value);
1071                if (len < 0)
1072                        return len;
1073                if ((value > 0) &&
1074                    (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1075                        return -ENOTSUPP;
1076                i += len;
1077                pkt_dev->clone_skb = value;
1078
1079                sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080                return count;
1081        }
1082        if (!strcmp(name, "count")) {
1083                len = num_arg(&user_buffer[i], 10, &value);
1084                if (len < 0)
1085                        return len;
1086
1087                i += len;
1088                pkt_dev->count = value;
1089                sprintf(pg_result, "OK: count=%llu",
1090                        (unsigned long long)pkt_dev->count);
1091                return count;
1092        }
1093        if (!strcmp(name, "src_mac_count")) {
1094                len = num_arg(&user_buffer[i], 10, &value);
1095                if (len < 0)
1096                        return len;
1097
1098                i += len;
1099                if (pkt_dev->src_mac_count != value) {
1100                        pkt_dev->src_mac_count = value;
1101                        pkt_dev->cur_src_mac_offset = 0;
1102                }
1103                sprintf(pg_result, "OK: src_mac_count=%d",
1104                        pkt_dev->src_mac_count);
1105                return count;
1106        }
1107        if (!strcmp(name, "dst_mac_count")) {
1108                len = num_arg(&user_buffer[i], 10, &value);
1109                if (len < 0)
1110                        return len;
1111
1112                i += len;
1113                if (pkt_dev->dst_mac_count != value) {
1114                        pkt_dev->dst_mac_count = value;
1115                        pkt_dev->cur_dst_mac_offset = 0;
1116                }
1117                sprintf(pg_result, "OK: dst_mac_count=%d",
1118                        pkt_dev->dst_mac_count);
1119                return count;
1120        }
1121        if (!strcmp(name, "node")) {
1122                len = num_arg(&user_buffer[i], 10, &value);
1123                if (len < 0)
1124                        return len;
1125
1126                i += len;
1127
1128                if (node_possible(value)) {
1129                        pkt_dev->node = value;
1130                        sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131                        if (pkt_dev->page) {
1132                                put_page(pkt_dev->page);
1133                                pkt_dev->page = NULL;
1134                        }
1135                }
1136                else
1137                        sprintf(pg_result, "ERROR: node not possible");
1138                return count;
1139        }
1140        if (!strcmp(name, "flag")) {
1141                char f[32];
1142                memset(f, 0, 32);
1143                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1144                if (len < 0)
1145                        return len;
1146
1147                if (copy_from_user(f, &user_buffer[i], len))
1148                        return -EFAULT;
1149                i += len;
1150                if (strcmp(f, "IPSRC_RND") == 0)
1151                        pkt_dev->flags |= F_IPSRC_RND;
1152
1153                else if (strcmp(f, "!IPSRC_RND") == 0)
1154                        pkt_dev->flags &= ~F_IPSRC_RND;
1155
1156                else if (strcmp(f, "TXSIZE_RND") == 0)
1157                        pkt_dev->flags |= F_TXSIZE_RND;
1158
1159                else if (strcmp(f, "!TXSIZE_RND") == 0)
1160                        pkt_dev->flags &= ~F_TXSIZE_RND;
1161
1162                else if (strcmp(f, "IPDST_RND") == 0)
1163                        pkt_dev->flags |= F_IPDST_RND;
1164
1165                else if (strcmp(f, "!IPDST_RND") == 0)
1166                        pkt_dev->flags &= ~F_IPDST_RND;
1167
1168                else if (strcmp(f, "UDPSRC_RND") == 0)
1169                        pkt_dev->flags |= F_UDPSRC_RND;
1170
1171                else if (strcmp(f, "!UDPSRC_RND") == 0)
1172                        pkt_dev->flags &= ~F_UDPSRC_RND;
1173
1174                else if (strcmp(f, "UDPDST_RND") == 0)
1175                        pkt_dev->flags |= F_UDPDST_RND;
1176
1177                else if (strcmp(f, "!UDPDST_RND") == 0)
1178                        pkt_dev->flags &= ~F_UDPDST_RND;
1179
1180                else if (strcmp(f, "MACSRC_RND") == 0)
1181                        pkt_dev->flags |= F_MACSRC_RND;
1182
1183                else if (strcmp(f, "!MACSRC_RND") == 0)
1184                        pkt_dev->flags &= ~F_MACSRC_RND;
1185
1186                else if (strcmp(f, "MACDST_RND") == 0)
1187                        pkt_dev->flags |= F_MACDST_RND;
1188
1189                else if (strcmp(f, "!MACDST_RND") == 0)
1190                        pkt_dev->flags &= ~F_MACDST_RND;
1191
1192                else if (strcmp(f, "MPLS_RND") == 0)
1193                        pkt_dev->flags |= F_MPLS_RND;
1194
1195                else if (strcmp(f, "!MPLS_RND") == 0)
1196                        pkt_dev->flags &= ~F_MPLS_RND;
1197
1198                else if (strcmp(f, "VID_RND") == 0)
1199                        pkt_dev->flags |= F_VID_RND;
1200
1201                else if (strcmp(f, "!VID_RND") == 0)
1202                        pkt_dev->flags &= ~F_VID_RND;
1203
1204                else if (strcmp(f, "SVID_RND") == 0)
1205                        pkt_dev->flags |= F_SVID_RND;
1206
1207                else if (strcmp(f, "!SVID_RND") == 0)
1208                        pkt_dev->flags &= ~F_SVID_RND;
1209
1210                else if (strcmp(f, "FLOW_SEQ") == 0)
1211                        pkt_dev->flags |= F_FLOW_SEQ;
1212
1213                else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214                        pkt_dev->flags |= F_QUEUE_MAP_RND;
1215
1216                else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217                        pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1218
1219                else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220                        pkt_dev->flags |= F_QUEUE_MAP_CPU;
1221
1222                else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223                        pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1224#ifdef CONFIG_XFRM
1225                else if (strcmp(f, "IPSEC") == 0)
1226                        pkt_dev->flags |= F_IPSEC_ON;
1227#endif
1228
1229                else if (strcmp(f, "!IPV6") == 0)
1230                        pkt_dev->flags &= ~F_IPV6;
1231
1232                else if (strcmp(f, "NODE_ALLOC") == 0)
1233                        pkt_dev->flags |= F_NODE;
1234
1235                else if (strcmp(f, "!NODE_ALLOC") == 0)
1236                        pkt_dev->flags &= ~F_NODE;
1237
1238                else {
1239                        sprintf(pg_result,
1240                                "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1241                                f,
1242                                "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243                                "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1244                        return count;
1245                }
1246                sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1247                return count;
1248        }
1249        if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1251                if (len < 0)
1252                        return len;
1253
1254                if (copy_from_user(buf, &user_buffer[i], len))
1255                        return -EFAULT;
1256                buf[len] = 0;
1257                if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258                        memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259                        strncpy(pkt_dev->dst_min, buf, len);
1260                        pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261                        pkt_dev->cur_daddr = pkt_dev->daddr_min;
1262                }
1263                if (debug)
1264                        pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1265                i += len;
1266                sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1267                return count;
1268        }
1269        if (!strcmp(name, "dst_max")) {
1270                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1271                if (len < 0)
1272                        return len;
1273
1274
1275                if (copy_from_user(buf, &user_buffer[i], len))
1276                        return -EFAULT;
1277
1278                buf[len] = 0;
1279                if (strcmp(buf, pkt_dev->dst_max) != 0) {
1280                        memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1281                        strncpy(pkt_dev->dst_max, buf, len);
1282                        pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1283                        pkt_dev->cur_daddr = pkt_dev->daddr_max;
1284                }
1285                if (debug)
1286                        pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1287                i += len;
1288                sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1289                return count;
1290        }
1291        if (!strcmp(name, "dst6")) {
1292                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1293                if (len < 0)
1294                        return len;
1295
1296                pkt_dev->flags |= F_IPV6;
1297
1298                if (copy_from_user(buf, &user_buffer[i], len))
1299                        return -EFAULT;
1300                buf[len] = 0;
1301
1302                scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1303                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1304
1305                pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1306
1307                if (debug)
1308                        pr_debug("dst6 set to: %s\n", buf);
1309
1310                i += len;
1311                sprintf(pg_result, "OK: dst6=%s", buf);
1312                return count;
1313        }
1314        if (!strcmp(name, "dst6_min")) {
1315                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1316                if (len < 0)
1317                        return len;
1318
1319                pkt_dev->flags |= F_IPV6;
1320
1321                if (copy_from_user(buf, &user_buffer[i], len))
1322                        return -EFAULT;
1323                buf[len] = 0;
1324
1325                scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1326                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1327
1328                pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1329                if (debug)
1330                        pr_debug("dst6_min set to: %s\n", buf);
1331
1332                i += len;
1333                sprintf(pg_result, "OK: dst6_min=%s", buf);
1334                return count;
1335        }
1336        if (!strcmp(name, "dst6_max")) {
1337                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1338                if (len < 0)
1339                        return len;
1340
1341                pkt_dev->flags |= F_IPV6;
1342
1343                if (copy_from_user(buf, &user_buffer[i], len))
1344                        return -EFAULT;
1345                buf[len] = 0;
1346
1347                scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1348                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1349
1350                if (debug)
1351                        pr_debug("dst6_max set to: %s\n", buf);
1352
1353                i += len;
1354                sprintf(pg_result, "OK: dst6_max=%s", buf);
1355                return count;
1356        }
1357        if (!strcmp(name, "src6")) {
1358                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1359                if (len < 0)
1360                        return len;
1361
1362                pkt_dev->flags |= F_IPV6;
1363
1364                if (copy_from_user(buf, &user_buffer[i], len))
1365                        return -EFAULT;
1366                buf[len] = 0;
1367
1368                scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1369                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1370
1371                pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1372
1373                if (debug)
1374                        pr_debug("src6 set to: %s\n", buf);
1375
1376                i += len;
1377                sprintf(pg_result, "OK: src6=%s", buf);
1378                return count;
1379        }
1380        if (!strcmp(name, "src_min")) {
1381                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1382                if (len < 0)
1383                        return len;
1384
1385                if (copy_from_user(buf, &user_buffer[i], len))
1386                        return -EFAULT;
1387                buf[len] = 0;
1388                if (strcmp(buf, pkt_dev->src_min) != 0) {
1389                        memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1390                        strncpy(pkt_dev->src_min, buf, len);
1391                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1392                        pkt_dev->cur_saddr = pkt_dev->saddr_min;
1393                }
1394                if (debug)
1395                        pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1396                i += len;
1397                sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1398                return count;
1399        }
1400        if (!strcmp(name, "src_max")) {
1401                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1402                if (len < 0)
1403                        return len;
1404
1405                if (copy_from_user(buf, &user_buffer[i], len))
1406                        return -EFAULT;
1407                buf[len] = 0;
1408                if (strcmp(buf, pkt_dev->src_max) != 0) {
1409                        memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1410                        strncpy(pkt_dev->src_max, buf, len);
1411                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1412                        pkt_dev->cur_saddr = pkt_dev->saddr_max;
1413                }
1414                if (debug)
1415                        pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1416                i += len;
1417                sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1418                return count;
1419        }
1420        if (!strcmp(name, "dst_mac")) {
1421                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1422                if (len < 0)
1423                        return len;
1424
1425                memset(valstr, 0, sizeof(valstr));
1426                if (copy_from_user(valstr, &user_buffer[i], len))
1427                        return -EFAULT;
1428
1429                if (!mac_pton(valstr, pkt_dev->dst_mac))
1430                        return -EINVAL;
1431                /* Set up Dest MAC */
1432                memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1433
1434                sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1435                return count;
1436        }
1437        if (!strcmp(name, "src_mac")) {
1438                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1439                if (len < 0)
1440                        return len;
1441
1442                memset(valstr, 0, sizeof(valstr));
1443                if (copy_from_user(valstr, &user_buffer[i], len))
1444                        return -EFAULT;
1445
1446                if (!mac_pton(valstr, pkt_dev->src_mac))
1447                        return -EINVAL;
1448                /* Set up Src MAC */
1449                memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1450
1451                sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1452                return count;
1453        }
1454
1455        if (!strcmp(name, "clear_counters")) {
1456                pktgen_clear_counters(pkt_dev);
1457                sprintf(pg_result, "OK: Clearing counters.\n");
1458                return count;
1459        }
1460
1461        if (!strcmp(name, "flows")) {
1462                len = num_arg(&user_buffer[i], 10, &value);
1463                if (len < 0)
1464                        return len;
1465
1466                i += len;
1467                if (value > MAX_CFLOWS)
1468                        value = MAX_CFLOWS;
1469
1470                pkt_dev->cflows = value;
1471                sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1472                return count;
1473        }
1474
1475        if (!strcmp(name, "flowlen")) {
1476                len = num_arg(&user_buffer[i], 10, &value);
1477                if (len < 0)
1478                        return len;
1479
1480                i += len;
1481                pkt_dev->lflow = value;
1482                sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1483                return count;
1484        }
1485
1486        if (!strcmp(name, "queue_map_min")) {
1487                len = num_arg(&user_buffer[i], 5, &value);
1488                if (len < 0)
1489                        return len;
1490
1491                i += len;
1492                pkt_dev->queue_map_min = value;
1493                sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1494                return count;
1495        }
1496
1497        if (!strcmp(name, "queue_map_max")) {
1498                len = num_arg(&user_buffer[i], 5, &value);
1499                if (len < 0)
1500                        return len;
1501
1502                i += len;
1503                pkt_dev->queue_map_max = value;
1504                sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1505                return count;
1506        }
1507
1508        if (!strcmp(name, "mpls")) {
1509                unsigned int n, cnt;
1510
1511                len = get_labels(&user_buffer[i], pkt_dev);
1512                if (len < 0)
1513                        return len;
1514                i += len;
1515                cnt = sprintf(pg_result, "OK: mpls=");
1516                for (n = 0; n < pkt_dev->nr_labels; n++)
1517                        cnt += sprintf(pg_result + cnt,
1518                                       "%08x%s", ntohl(pkt_dev->labels[n]),
1519                                       n == pkt_dev->nr_labels-1 ? "" : ",");
1520
1521                if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1522                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1523                        pkt_dev->svlan_id = 0xffff;
1524
1525                        if (debug)
1526                                pr_debug("VLAN/SVLAN auto turned off\n");
1527                }
1528                return count;
1529        }
1530
1531        if (!strcmp(name, "vlan_id")) {
1532                len = num_arg(&user_buffer[i], 4, &value);
1533                if (len < 0)
1534                        return len;
1535
1536                i += len;
1537                if (value <= 4095) {
1538                        pkt_dev->vlan_id = value;  /* turn on VLAN */
1539
1540                        if (debug)
1541                                pr_debug("VLAN turned on\n");
1542
1543                        if (debug && pkt_dev->nr_labels)
1544                                pr_debug("MPLS auto turned off\n");
1545
1546                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1547                        sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1548                } else {
1549                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1550                        pkt_dev->svlan_id = 0xffff;
1551
1552                        if (debug)
1553                                pr_debug("VLAN/SVLAN turned off\n");
1554                }
1555                return count;
1556        }
1557
1558        if (!strcmp(name, "vlan_p")) {
1559                len = num_arg(&user_buffer[i], 1, &value);
1560                if (len < 0)
1561                        return len;
1562
1563                i += len;
1564                if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1565                        pkt_dev->vlan_p = value;
1566                        sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1567                } else {
1568                        sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1569                }
1570                return count;
1571        }
1572
1573        if (!strcmp(name, "vlan_cfi")) {
1574                len = num_arg(&user_buffer[i], 1, &value);
1575                if (len < 0)
1576                        return len;
1577
1578                i += len;
1579                if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1580                        pkt_dev->vlan_cfi = value;
1581                        sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1582                } else {
1583                        sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1584                }
1585                return count;
1586        }
1587
1588        if (!strcmp(name, "svlan_id")) {
1589                len = num_arg(&user_buffer[i], 4, &value);
1590                if (len < 0)
1591                        return len;
1592
1593                i += len;
1594                if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1595                        pkt_dev->svlan_id = value;  /* turn on SVLAN */
1596
1597                        if (debug)
1598                                pr_debug("SVLAN turned on\n");
1599
1600                        if (debug && pkt_dev->nr_labels)
1601                                pr_debug("MPLS auto turned off\n");
1602
1603                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1604                        sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1605                } else {
1606                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1607                        pkt_dev->svlan_id = 0xffff;
1608
1609                        if (debug)
1610                                pr_debug("VLAN/SVLAN turned off\n");
1611                }
1612                return count;
1613        }
1614
1615        if (!strcmp(name, "svlan_p")) {
1616                len = num_arg(&user_buffer[i], 1, &value);
1617                if (len < 0)
1618                        return len;
1619
1620                i += len;
1621                if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1622                        pkt_dev->svlan_p = value;
1623                        sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1624                } else {
1625                        sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1626                }
1627                return count;
1628        }
1629
1630        if (!strcmp(name, "svlan_cfi")) {
1631                len = num_arg(&user_buffer[i], 1, &value);
1632                if (len < 0)
1633                        return len;
1634
1635                i += len;
1636                if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1637                        pkt_dev->svlan_cfi = value;
1638                        sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1639                } else {
1640                        sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1641                }
1642                return count;
1643        }
1644
1645        if (!strcmp(name, "tos")) {
1646                __u32 tmp_value = 0;
1647                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1648                if (len < 0)
1649                        return len;
1650
1651                i += len;
1652                if (len == 2) {
1653                        pkt_dev->tos = tmp_value;
1654                        sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1655                } else {
1656                        sprintf(pg_result, "ERROR: tos must be 00-ff");
1657                }
1658                return count;
1659        }
1660
1661        if (!strcmp(name, "traffic_class")) {
1662                __u32 tmp_value = 0;
1663                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1664                if (len < 0)
1665                        return len;
1666
1667                i += len;
1668                if (len == 2) {
1669                        pkt_dev->traffic_class = tmp_value;
1670                        sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1671                } else {
1672                        sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1673                }
1674                return count;
1675        }
1676
1677        if (!strcmp(name, "skb_priority")) {
1678                len = num_arg(&user_buffer[i], 9, &value);
1679                if (len < 0)
1680                        return len;
1681
1682                i += len;
1683                pkt_dev->skb_priority = value;
1684                sprintf(pg_result, "OK: skb_priority=%i",
1685                        pkt_dev->skb_priority);
1686                return count;
1687        }
1688
1689        sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1690        return -EINVAL;
1691}
1692
1693static int pktgen_if_open(struct inode *inode, struct file *file)
1694{
1695        return single_open(file, pktgen_if_show, PDE(inode)->data);
1696}
1697
1698static const struct file_operations pktgen_if_fops = {
1699        .owner   = THIS_MODULE,
1700        .open    = pktgen_if_open,
1701        .read    = seq_read,
1702        .llseek  = seq_lseek,
1703        .write   = pktgen_if_write,
1704        .release = single_release,
1705};
1706
1707static int pktgen_thread_show(struct seq_file *seq, void *v)
1708{
1709        struct pktgen_thread *t = seq->private;
1710        const struct pktgen_dev *pkt_dev;
1711
1712        BUG_ON(!t);
1713
1714        seq_printf(seq, "Running: ");
1715
1716        if_lock(t);
1717        list_for_each_entry(pkt_dev, &t->if_list, list)
1718                if (pkt_dev->running)
1719                        seq_printf(seq, "%s ", pkt_dev->odevname);
1720
1721        seq_printf(seq, "\nStopped: ");
1722
1723        list_for_each_entry(pkt_dev, &t->if_list, list)
1724                if (!pkt_dev->running)
1725                        seq_printf(seq, "%s ", pkt_dev->odevname);
1726
1727        if (t->result[0])
1728                seq_printf(seq, "\nResult: %s\n", t->result);
1729        else
1730                seq_printf(seq, "\nResult: NA\n");
1731
1732        if_unlock(t);
1733
1734        return 0;
1735}
1736
1737static ssize_t pktgen_thread_write(struct file *file,
1738                                   const char __user * user_buffer,
1739                                   size_t count, loff_t * offset)
1740{
1741        struct seq_file *seq = file->private_data;
1742        struct pktgen_thread *t = seq->private;
1743        int i, max, len, ret;
1744        char name[40];
1745        char *pg_result;
1746
1747        if (count < 1) {
1748                //      sprintf(pg_result, "Wrong command format");
1749                return -EINVAL;
1750        }
1751
1752        max = count;
1753        len = count_trail_chars(user_buffer, max);
1754        if (len < 0)
1755                return len;
1756
1757        i = len;
1758
1759        /* Read variable name */
1760
1761        len = strn_len(&user_buffer[i], sizeof(name) - 1);
1762        if (len < 0)
1763                return len;
1764
1765        memset(name, 0, sizeof(name));
1766        if (copy_from_user(name, &user_buffer[i], len))
1767                return -EFAULT;
1768        i += len;
1769
1770        max = count - i;
1771        len = count_trail_chars(&user_buffer[i], max);
1772        if (len < 0)
1773                return len;
1774
1775        i += len;
1776
1777        if (debug)
1778                pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1779
1780        if (!t) {
1781                pr_err("ERROR: No thread\n");
1782                ret = -EINVAL;
1783                goto out;
1784        }
1785
1786        pg_result = &(t->result[0]);
1787
1788        if (!strcmp(name, "add_device")) {
1789                char f[32];
1790                memset(f, 0, 32);
1791                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1792                if (len < 0) {
1793                        ret = len;
1794                        goto out;
1795                }
1796                if (copy_from_user(f, &user_buffer[i], len))
1797                        return -EFAULT;
1798                i += len;
1799                mutex_lock(&pktgen_thread_lock);
1800                pktgen_add_device(t, f);
1801                mutex_unlock(&pktgen_thread_lock);
1802                ret = count;
1803                sprintf(pg_result, "OK: add_device=%s", f);
1804                goto out;
1805        }
1806
1807        if (!strcmp(name, "rem_device_all")) {
1808                mutex_lock(&pktgen_thread_lock);
1809                t->control |= T_REMDEVALL;
1810                mutex_unlock(&pktgen_thread_lock);
1811                schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1812                ret = count;
1813                sprintf(pg_result, "OK: rem_device_all");
1814                goto out;
1815        }
1816
1817        if (!strcmp(name, "max_before_softirq")) {
1818                sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1819                ret = count;
1820                goto out;
1821        }
1822
1823        ret = -EINVAL;
1824out:
1825        return ret;
1826}
1827
1828static int pktgen_thread_open(struct inode *inode, struct file *file)
1829{
1830        return single_open(file, pktgen_thread_show, PDE(inode)->data);
1831}
1832
1833static const struct file_operations pktgen_thread_fops = {
1834        .owner   = THIS_MODULE,
1835        .open    = pktgen_thread_open,
1836        .read    = seq_read,
1837        .llseek  = seq_lseek,
1838        .write   = pktgen_thread_write,
1839        .release = single_release,
1840};
1841
1842/* Think find or remove for NN */
1843static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1844{
1845        struct pktgen_thread *t;
1846        struct pktgen_dev *pkt_dev = NULL;
1847        bool exact = (remove == FIND);
1848
1849        list_for_each_entry(t, &pktgen_threads, th_list) {
1850                pkt_dev = pktgen_find_dev(t, ifname, exact);
1851                if (pkt_dev) {
1852                        if (remove) {
1853                                if_lock(t);
1854                                pkt_dev->removal_mark = 1;
1855                                t->control |= T_REMDEV;
1856                                if_unlock(t);
1857                        }
1858                        break;
1859                }
1860        }
1861        return pkt_dev;
1862}
1863
1864/*
1865 * mark a device for removal
1866 */
1867static void pktgen_mark_device(const char *ifname)
1868{
1869        struct pktgen_dev *pkt_dev = NULL;
1870        const int max_tries = 10, msec_per_try = 125;
1871        int i = 0;
1872
1873        mutex_lock(&pktgen_thread_lock);
1874        pr_debug("%s: marking %s for removal\n", __func__, ifname);
1875
1876        while (1) {
1877
1878                pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1879                if (pkt_dev == NULL)
1880                        break;  /* success */
1881
1882                mutex_unlock(&pktgen_thread_lock);
1883                pr_debug("%s: waiting for %s to disappear....\n",
1884                         __func__, ifname);
1885                schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1886                mutex_lock(&pktgen_thread_lock);
1887
1888                if (++i >= max_tries) {
1889                        pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1890                               __func__, msec_per_try * i, ifname);
1891                        break;
1892                }
1893
1894        }
1895
1896        mutex_unlock(&pktgen_thread_lock);
1897}
1898
1899static void pktgen_change_name(struct net_device *dev)
1900{
1901        struct pktgen_thread *t;
1902
1903        list_for_each_entry(t, &pktgen_threads, th_list) {
1904                struct pktgen_dev *pkt_dev;
1905
1906                list_for_each_entry(pkt_dev, &t->if_list, list) {
1907                        if (pkt_dev->odev != dev)
1908                                continue;
1909
1910                        remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1911
1912                        pkt_dev->entry = proc_create_data(dev->name, 0600,
1913                                                          pg_proc_dir,
1914                                                          &pktgen_if_fops,
1915                                                          pkt_dev);
1916                        if (!pkt_dev->entry)
1917                                pr_err("can't move proc entry for '%s'\n",
1918                                       dev->name);
1919                        break;
1920                }
1921        }
1922}
1923
1924static int pktgen_device_event(struct notifier_block *unused,
1925                               unsigned long event, void *ptr)
1926{
1927        struct net_device *dev = ptr;
1928
1929        if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting)
1930                return NOTIFY_DONE;
1931
1932        /* It is OK that we do not hold the group lock right now,
1933         * as we run under the RTNL lock.
1934         */
1935
1936        switch (event) {
1937        case NETDEV_CHANGENAME:
1938                pktgen_change_name(dev);
1939                break;
1940
1941        case NETDEV_UNREGISTER:
1942                pktgen_mark_device(dev->name);
1943                break;
1944        }
1945
1946        return NOTIFY_DONE;
1947}
1948
1949static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1950                                                 const char *ifname)
1951{
1952        char b[IFNAMSIZ+5];
1953        int i;
1954
1955        for (i = 0; ifname[i] != '@'; i++) {
1956                if (i == IFNAMSIZ)
1957                        break;
1958
1959                b[i] = ifname[i];
1960        }
1961        b[i] = 0;
1962
1963        return dev_get_by_name(&init_net, b);
1964}
1965
1966
1967/* Associate pktgen_dev with a device. */
1968
1969static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1970{
1971        struct net_device *odev;
1972        int err;
1973
1974        /* Clean old setups */
1975        if (pkt_dev->odev) {
1976                dev_put(pkt_dev->odev);
1977                pkt_dev->odev = NULL;
1978        }
1979
1980        odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1981        if (!odev) {
1982                pr_err("no such netdevice: \"%s\"\n", ifname);
1983                return -ENODEV;
1984        }
1985
1986        if (odev->type != ARPHRD_ETHER) {
1987                pr_err("not an ethernet device: \"%s\"\n", ifname);
1988                err = -EINVAL;
1989        } else if (!netif_running(odev)) {
1990                pr_err("device is down: \"%s\"\n", ifname);
1991                err = -ENETDOWN;
1992        } else {
1993                pkt_dev->odev = odev;
1994                return 0;
1995        }
1996
1997        dev_put(odev);
1998        return err;
1999}
2000
2001/* Read pkt_dev from the interface and set up internal pktgen_dev
2002 * structure to have the right information to create/send packets
2003 */
2004static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2005{
2006        int ntxq;
2007
2008        if (!pkt_dev->odev) {
2009                pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2010                sprintf(pkt_dev->result,
2011                        "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2012                return;
2013        }
2014
2015        /* make sure that we don't pick a non-existing transmit queue */
2016        ntxq = pkt_dev->odev->real_num_tx_queues;
2017
2018        if (ntxq <= pkt_dev->queue_map_min) {
2019                pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2020                           pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2021                           pkt_dev->odevname);
2022                pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2023        }
2024        if (pkt_dev->queue_map_max >= ntxq) {
2025                pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2026                           pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2027                           pkt_dev->odevname);
2028                pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2029        }
2030
2031        /* Default to the interface's mac if not explicitly set. */
2032
2033        if (is_zero_ether_addr(pkt_dev->src_mac))
2034                memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2035
2036        /* Set up Dest MAC */
2037        memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2038
2039        /* Set up pkt size */
2040        pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2041
2042        if (pkt_dev->flags & F_IPV6) {
2043                /*
2044                 * Skip this automatic address setting until locks or functions
2045                 * gets exported
2046                 */
2047
2048#ifdef NOTNOW
2049                int i, set = 0, err = 1;
2050                struct inet6_dev *idev;
2051
2052                for (i = 0; i < IN6_ADDR_HSIZE; i++)
2053                        if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2054                                set = 1;
2055                                break;
2056                        }
2057
2058                if (!set) {
2059
2060                        /*
2061                         * Use linklevel address if unconfigured.
2062                         *
2063                         * use ipv6_get_lladdr if/when it's get exported
2064                         */
2065
2066                        rcu_read_lock();
2067                        idev = __in6_dev_get(pkt_dev->odev);
2068                        if (idev) {
2069                                struct inet6_ifaddr *ifp;
2070
2071                                read_lock_bh(&idev->lock);
2072                                for (ifp = idev->addr_list; ifp;
2073                                     ifp = ifp->if_next) {
2074                                        if (ifp->scope == IFA_LINK &&
2075                                            !(ifp->flags & IFA_F_TENTATIVE)) {
2076                                                pkt_dev->cur_in6_saddr = ifp->addr;
2077                                                err = 0;
2078                                                break;
2079                                        }
2080                                }
2081                                read_unlock_bh(&idev->lock);
2082                        }
2083                        rcu_read_unlock();
2084                        if (err)
2085                                pr_err("ERROR: IPv6 link address not available\n");
2086                }
2087#endif
2088        } else {
2089                pkt_dev->saddr_min = 0;
2090                pkt_dev->saddr_max = 0;
2091                if (strlen(pkt_dev->src_min) == 0) {
2092
2093                        struct in_device *in_dev;
2094
2095                        rcu_read_lock();
2096                        in_dev = __in_dev_get_rcu(pkt_dev->odev);
2097                        if (in_dev) {
2098                                if (in_dev->ifa_list) {
2099                                        pkt_dev->saddr_min =
2100                                            in_dev->ifa_list->ifa_address;
2101                                        pkt_dev->saddr_max = pkt_dev->saddr_min;
2102                                }
2103                        }
2104                        rcu_read_unlock();
2105                } else {
2106                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2107                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2108                }
2109
2110                pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2111                pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2112        }
2113        /* Initialize current values. */
2114        pkt_dev->cur_dst_mac_offset = 0;
2115        pkt_dev->cur_src_mac_offset = 0;
2116        pkt_dev->cur_saddr = pkt_dev->saddr_min;
2117        pkt_dev->cur_daddr = pkt_dev->daddr_min;
2118        pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2119        pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2120        pkt_dev->nflows = 0;
2121}
2122
2123
2124static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2125{
2126        ktime_t start_time, end_time;
2127        s64 remaining;
2128        struct hrtimer_sleeper t;
2129
2130        hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2131        hrtimer_set_expires(&t.timer, spin_until);
2132
2133        remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2134        if (remaining <= 0) {
2135                pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2136                return;
2137        }
2138
2139        start_time = ktime_now();
2140        if (remaining < 100000) {
2141                /* for small delays (<100us), just loop until limit is reached */
2142                do {
2143                        end_time = ktime_now();
2144                } while (ktime_lt(end_time, spin_until));
2145        } else {
2146                /* see do_nanosleep */
2147                hrtimer_init_sleeper(&t, current);
2148                do {
2149                        set_current_state(TASK_INTERRUPTIBLE);
2150                        hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2151                        if (!hrtimer_active(&t.timer))
2152                                t.task = NULL;
2153
2154                        if (likely(t.task))
2155                                schedule();
2156
2157                        hrtimer_cancel(&t.timer);
2158                } while (t.task && pkt_dev->running && !signal_pending(current));
2159                __set_current_state(TASK_RUNNING);
2160                end_time = ktime_now();
2161        }
2162
2163        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2164        pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2165}
2166
2167static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2168{
2169        pkt_dev->pkt_overhead = 0;
2170        pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2171        pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2172        pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2173}
2174
2175static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2176{
2177        return !!(pkt_dev->flows[flow].flags & F_INIT);
2178}
2179
2180static inline int f_pick(struct pktgen_dev *pkt_dev)
2181{
2182        int flow = pkt_dev->curfl;
2183
2184        if (pkt_dev->flags & F_FLOW_SEQ) {
2185                if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2186                        /* reset time */
2187                        pkt_dev->flows[flow].count = 0;
2188                        pkt_dev->flows[flow].flags = 0;
2189                        pkt_dev->curfl += 1;
2190                        if (pkt_dev->curfl >= pkt_dev->cflows)
2191                                pkt_dev->curfl = 0; /*reset */
2192                }
2193        } else {
2194                flow = random32() % pkt_dev->cflows;
2195                pkt_dev->curfl = flow;
2196
2197                if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2198                        pkt_dev->flows[flow].count = 0;
2199                        pkt_dev->flows[flow].flags = 0;
2200                }
2201        }
2202
2203        return pkt_dev->curfl;
2204}
2205
2206
2207#ifdef CONFIG_XFRM
2208/* If there was already an IPSEC SA, we keep it as is, else
2209 * we go look for it ...
2210*/
2211#define DUMMY_MARK 0
2212static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2213{
2214        struct xfrm_state *x = pkt_dev->flows[flow].x;
2215        if (!x) {
2216                /*slow path: we dont already have xfrm_state*/
2217                x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2218                                        (xfrm_address_t *)&pkt_dev->cur_daddr,
2219                                        (xfrm_address_t *)&pkt_dev->cur_saddr,
2220                                        AF_INET,
2221                                        pkt_dev->ipsmode,
2222                                        pkt_dev->ipsproto, 0);
2223                if (x) {
2224                        pkt_dev->flows[flow].x = x;
2225                        set_pkt_overhead(pkt_dev);
2226                        pkt_dev->pkt_overhead += x->props.header_len;
2227                }
2228
2229        }
2230}
2231#endif
2232static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2233{
2234
2235        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2236                pkt_dev->cur_queue_map = smp_processor_id();
2237
2238        else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2239                __u16 t;
2240                if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2241                        t = random32() %
2242                                (pkt_dev->queue_map_max -
2243                                 pkt_dev->queue_map_min + 1)
2244                                + pkt_dev->queue_map_min;
2245                } else {
2246                        t = pkt_dev->cur_queue_map + 1;
2247                        if (t > pkt_dev->queue_map_max)
2248                                t = pkt_dev->queue_map_min;
2249                }
2250                pkt_dev->cur_queue_map = t;
2251        }
2252        pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2253}
2254
2255/* Increment/randomize headers according to flags and current values
2256 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2257 */
2258static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2259{
2260        __u32 imn;
2261        __u32 imx;
2262        int flow = 0;
2263
2264        if (pkt_dev->cflows)
2265                flow = f_pick(pkt_dev);
2266
2267        /*  Deal with source MAC */
2268        if (pkt_dev->src_mac_count > 1) {
2269                __u32 mc;
2270                __u32 tmp;
2271
2272                if (pkt_dev->flags & F_MACSRC_RND)
2273                        mc = random32() % pkt_dev->src_mac_count;
2274                else {
2275                        mc = pkt_dev->cur_src_mac_offset++;
2276                        if (pkt_dev->cur_src_mac_offset >=
2277                            pkt_dev->src_mac_count)
2278                                pkt_dev->cur_src_mac_offset = 0;
2279                }
2280
2281                tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2282                pkt_dev->hh[11] = tmp;
2283                tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2284                pkt_dev->hh[10] = tmp;
2285                tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2286                pkt_dev->hh[9] = tmp;
2287                tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2288                pkt_dev->hh[8] = tmp;
2289                tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2290                pkt_dev->hh[7] = tmp;
2291        }
2292
2293        /*  Deal with Destination MAC */
2294        if (pkt_dev->dst_mac_count > 1) {
2295                __u32 mc;
2296                __u32 tmp;
2297
2298                if (pkt_dev->flags & F_MACDST_RND)
2299                        mc = random32() % pkt_dev->dst_mac_count;
2300
2301                else {
2302                        mc = pkt_dev->cur_dst_mac_offset++;
2303                        if (pkt_dev->cur_dst_mac_offset >=
2304                            pkt_dev->dst_mac_count) {
2305                                pkt_dev->cur_dst_mac_offset = 0;
2306                        }
2307                }
2308
2309                tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2310                pkt_dev->hh[5] = tmp;
2311                tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2312                pkt_dev->hh[4] = tmp;
2313                tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2314                pkt_dev->hh[3] = tmp;
2315                tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2316                pkt_dev->hh[2] = tmp;
2317                tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2318                pkt_dev->hh[1] = tmp;
2319        }
2320
2321        if (pkt_dev->flags & F_MPLS_RND) {
2322                unsigned int i;
2323                for (i = 0; i < pkt_dev->nr_labels; i++)
2324                        if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2325                                pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2326                                             ((__force __be32)random32() &
2327                                                      htonl(0x000fffff));
2328        }
2329
2330        if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2331                pkt_dev->vlan_id = random32() & (4096-1);
2332        }
2333
2334        if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2335                pkt_dev->svlan_id = random32() & (4096 - 1);
2336        }
2337
2338        if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2339                if (pkt_dev->flags & F_UDPSRC_RND)
2340                        pkt_dev->cur_udp_src = random32() %
2341                                (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2342                                + pkt_dev->udp_src_min;
2343
2344                else {
2345                        pkt_dev->cur_udp_src++;
2346                        if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2347                                pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2348                }
2349        }
2350
2351        if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2352                if (pkt_dev->flags & F_UDPDST_RND) {
2353                        pkt_dev->cur_udp_dst = random32() %
2354                                (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2355                                + pkt_dev->udp_dst_min;
2356                } else {
2357                        pkt_dev->cur_udp_dst++;
2358                        if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2359                                pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2360                }
2361        }
2362
2363        if (!(pkt_dev->flags & F_IPV6)) {
2364
2365                imn = ntohl(pkt_dev->saddr_min);
2366                imx = ntohl(pkt_dev->saddr_max);
2367                if (imn < imx) {
2368                        __u32 t;
2369                        if (pkt_dev->flags & F_IPSRC_RND)
2370                                t = random32() % (imx - imn) + imn;
2371                        else {
2372                                t = ntohl(pkt_dev->cur_saddr);
2373                                t++;
2374                                if (t > imx)
2375                                        t = imn;
2376
2377                        }
2378                        pkt_dev->cur_saddr = htonl(t);
2379                }
2380
2381                if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2382                        pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2383                } else {
2384                        imn = ntohl(pkt_dev->daddr_min);
2385                        imx = ntohl(pkt_dev->daddr_max);
2386                        if (imn < imx) {
2387                                __u32 t;
2388                                __be32 s;
2389                                if (pkt_dev->flags & F_IPDST_RND) {
2390
2391                                        t = random32() % (imx - imn) + imn;
2392                                        s = htonl(t);
2393
2394                                        while (ipv4_is_loopback(s) ||
2395                                               ipv4_is_multicast(s) ||
2396                                               ipv4_is_lbcast(s) ||
2397                                               ipv4_is_zeronet(s) ||
2398                                               ipv4_is_local_multicast(s)) {
2399                                                t = random32() % (imx - imn) + imn;
2400                                                s = htonl(t);
2401                                        }
2402                                        pkt_dev->cur_daddr = s;
2403                                } else {
2404                                        t = ntohl(pkt_dev->cur_daddr);
2405                                        t++;
2406                                        if (t > imx) {
2407                                                t = imn;
2408                                        }
2409                                        pkt_dev->cur_daddr = htonl(t);
2410                                }
2411                        }
2412                        if (pkt_dev->cflows) {
2413                                pkt_dev->flows[flow].flags |= F_INIT;
2414                                pkt_dev->flows[flow].cur_daddr =
2415                                    pkt_dev->cur_daddr;
2416#ifdef CONFIG_XFRM
2417                                if (pkt_dev->flags & F_IPSEC_ON)
2418                                        get_ipsec_sa(pkt_dev, flow);
2419#endif
2420                                pkt_dev->nflows++;
2421                        }
2422                }
2423        } else {                /* IPV6 * */
2424
2425                if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2426                    pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2427                    pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2428                    pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2429                else {
2430                        int i;
2431
2432                        /* Only random destinations yet */
2433
2434                        for (i = 0; i < 4; i++) {
2435                                pkt_dev->cur_in6_daddr.s6_addr32[i] =
2436                                    (((__force __be32)random32() |
2437                                      pkt_dev->min_in6_daddr.s6_addr32[i]) &
2438                                     pkt_dev->max_in6_daddr.s6_addr32[i]);
2439                        }
2440                }
2441        }
2442
2443        if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2444                __u32 t;
2445                if (pkt_dev->flags & F_TXSIZE_RND) {
2446                        t = random32() %
2447                                (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2448                                + pkt_dev->min_pkt_size;
2449                } else {
2450                        t = pkt_dev->cur_pkt_size + 1;
2451                        if (t > pkt_dev->max_pkt_size)
2452                                t = pkt_dev->min_pkt_size;
2453                }
2454                pkt_dev->cur_pkt_size = t;
2455        }
2456
2457        set_cur_queue_map(pkt_dev);
2458
2459        pkt_dev->flows[flow].count++;
2460}
2461
2462
2463#ifdef CONFIG_XFRM
2464static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2465{
2466        struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2467        int err = 0;
2468
2469        if (!x)
2470                return 0;
2471        /* XXX: we dont support tunnel mode for now until
2472         * we resolve the dst issue */
2473        if (x->props.mode != XFRM_MODE_TRANSPORT)
2474                return 0;
2475
2476        spin_lock(&x->lock);
2477
2478        err = x->outer_mode->output(x, skb);
2479        if (err)
2480                goto error;
2481        err = x->type->output(x, skb);
2482        if (err)
2483                goto error;
2484
2485        x->curlft.bytes += skb->len;
2486        x->curlft.packets++;
2487error:
2488        spin_unlock(&x->lock);
2489        return err;
2490}
2491
2492static void free_SAs(struct pktgen_dev *pkt_dev)
2493{
2494        if (pkt_dev->cflows) {
2495                /* let go of the SAs if we have them */
2496                int i;
2497                for (i = 0; i < pkt_dev->cflows; i++) {
2498                        struct xfrm_state *x = pkt_dev->flows[i].x;
2499                        if (x) {
2500                                xfrm_state_put(x);
2501                                pkt_dev->flows[i].x = NULL;
2502                        }
2503                }
2504        }
2505}
2506
2507static int process_ipsec(struct pktgen_dev *pkt_dev,
2508                              struct sk_buff *skb, __be16 protocol)
2509{
2510        if (pkt_dev->flags & F_IPSEC_ON) {
2511                struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2512                int nhead = 0;
2513                if (x) {
2514                        int ret;
2515                        __u8 *eth;
2516                        nhead = x->props.header_len - skb_headroom(skb);
2517                        if (nhead > 0) {
2518                                ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2519                                if (ret < 0) {
2520                                        pr_err("Error expanding ipsec packet %d\n",
2521                                               ret);
2522                                        goto err;
2523                                }
2524                        }
2525
2526                        /* ipsec is not expecting ll header */
2527                        skb_pull(skb, ETH_HLEN);
2528                        ret = pktgen_output_ipsec(skb, pkt_dev);
2529                        if (ret) {
2530                                pr_err("Error creating ipsec packet %d\n", ret);
2531                                goto err;
2532                        }
2533                        /* restore ll */
2534                        eth = (__u8 *) skb_push(skb, ETH_HLEN);
2535                        memcpy(eth, pkt_dev->hh, 12);
2536                        *(u16 *) &eth[12] = protocol;
2537                }
2538        }
2539        return 1;
2540err:
2541        kfree_skb(skb);
2542        return 0;
2543}
2544#endif
2545
2546static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2547{
2548        unsigned int i;
2549        for (i = 0; i < pkt_dev->nr_labels; i++)
2550                *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2551
2552        mpls--;
2553        *mpls |= MPLS_STACK_BOTTOM;
2554}
2555
2556static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2557                               unsigned int prio)
2558{
2559        return htons(id | (cfi << 12) | (prio << 13));
2560}
2561
2562static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2563                                int datalen)
2564{
2565        struct timeval timestamp;
2566        struct pktgen_hdr *pgh;
2567
2568        pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2569        datalen -= sizeof(*pgh);
2570
2571        if (pkt_dev->nfrags <= 0) {
2572                memset(skb_put(skb, datalen), 0, datalen);
2573        } else {
2574                int frags = pkt_dev->nfrags;
2575                int i, len;
2576                int frag_len;
2577
2578
2579                if (frags > MAX_SKB_FRAGS)
2580                        frags = MAX_SKB_FRAGS;
2581                len = datalen - frags * PAGE_SIZE;
2582                if (len > 0) {
2583                        memset(skb_put(skb, len), 0, len);
2584                        datalen = frags * PAGE_SIZE;
2585                }
2586
2587                i = 0;
2588                frag_len = (datalen/frags) < PAGE_SIZE ?
2589                           (datalen/frags) : PAGE_SIZE;
2590                while (datalen > 0) {
2591                        if (unlikely(!pkt_dev->page)) {
2592                                int node = numa_node_id();
2593
2594                                if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2595                                        node = pkt_dev->node;
2596                                pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2597                                if (!pkt_dev->page)
2598                                        break;
2599                        }
2600                        get_page(pkt_dev->page);
2601                        skb_frag_set_page(skb, i, pkt_dev->page);
2602                        skb_shinfo(skb)->frags[i].page_offset = 0;
2603                        /*last fragment, fill rest of data*/
2604                        if (i == (frags - 1))
2605                                skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2606                                    (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2607                        else
2608                                skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2609                        datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2610                        skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2611                        skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2612                        i++;
2613                        skb_shinfo(skb)->nr_frags = i;
2614                }
2615        }
2616
2617        /* Stamp the time, and sequence number,
2618         * convert them to network byte order
2619         */
2620        pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2621        pgh->seq_num = htonl(pkt_dev->seq_num);
2622
2623        do_gettimeofday(&timestamp);
2624        pgh->tv_sec = htonl(timestamp.tv_sec);
2625        pgh->tv_usec = htonl(timestamp.tv_usec);
2626}
2627
2628static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2629                                        struct pktgen_dev *pkt_dev)
2630{
2631        struct sk_buff *skb = NULL;
2632        __u8 *eth;
2633        struct udphdr *udph;
2634        int datalen, iplen;
2635        struct iphdr *iph;
2636        __be16 protocol = htons(ETH_P_IP);
2637        __be32 *mpls;
2638        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2639        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2640        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2641        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2642        u16 queue_map;
2643
2644        if (pkt_dev->nr_labels)
2645                protocol = htons(ETH_P_MPLS_UC);
2646
2647        if (pkt_dev->vlan_id != 0xffff)
2648                protocol = htons(ETH_P_8021Q);
2649
2650        /* Update any of the values, used when we're incrementing various
2651         * fields.
2652         */
2653        mod_cur_headers(pkt_dev);
2654        queue_map = pkt_dev->cur_queue_map;
2655
2656        datalen = (odev->hard_header_len + 16) & ~0xf;
2657
2658        if (pkt_dev->flags & F_NODE) {
2659                int node;
2660
2661                if (pkt_dev->node >= 0)
2662                        node = pkt_dev->node;
2663                else
2664                        node =  numa_node_id();
2665
2666                skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2667                                  + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2668                if (likely(skb)) {
2669                        skb_reserve(skb, NET_SKB_PAD);
2670                        skb->dev = odev;
2671                }
2672        }
2673        else
2674          skb = __netdev_alloc_skb(odev,
2675                                   pkt_dev->cur_pkt_size + 64
2676                                   + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2677
2678        if (!skb) {
2679                sprintf(pkt_dev->result, "No memory");
2680                return NULL;
2681        }
2682        prefetchw(skb->data);
2683
2684        skb_reserve(skb, datalen);
2685
2686        /*  Reserve for ethernet and IP header  */
2687        eth = (__u8 *) skb_push(skb, 14);
2688        mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2689        if (pkt_dev->nr_labels)
2690                mpls_push(mpls, pkt_dev);
2691
2692        if (pkt_dev->vlan_id != 0xffff) {
2693                if (pkt_dev->svlan_id != 0xffff) {
2694                        svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2695                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2696                                               pkt_dev->svlan_cfi,
2697                                               pkt_dev->svlan_p);
2698                        svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2699                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2700                }
2701                vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2702                *vlan_tci = build_tci(pkt_dev->vlan_id,
2703                                      pkt_dev->vlan_cfi,
2704                                      pkt_dev->vlan_p);
2705                vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2706                *vlan_encapsulated_proto = htons(ETH_P_IP);
2707        }
2708
2709        skb->network_header = skb->tail;
2710        skb->transport_header = skb->network_header + sizeof(struct iphdr);
2711        skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2712        skb_set_queue_mapping(skb, queue_map);
2713        skb->priority = pkt_dev->skb_priority;
2714
2715        iph = ip_hdr(skb);
2716        udph = udp_hdr(skb);
2717
2718        memcpy(eth, pkt_dev->hh, 12);
2719        *(__be16 *) & eth[12] = protocol;
2720
2721        /* Eth + IPh + UDPh + mpls */
2722        datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2723                  pkt_dev->pkt_overhead;
2724        if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2725                datalen = sizeof(struct pktgen_hdr);
2726
2727        udph->source = htons(pkt_dev->cur_udp_src);
2728        udph->dest = htons(pkt_dev->cur_udp_dst);
2729        udph->len = htons(datalen + 8); /* DATA + udphdr */
2730        udph->check = 0;        /* No checksum */
2731
2732        iph->ihl = 5;
2733        iph->version = 4;
2734        iph->ttl = 32;
2735        iph->tos = pkt_dev->tos;
2736        iph->protocol = IPPROTO_UDP;    /* UDP */
2737        iph->saddr = pkt_dev->cur_saddr;
2738        iph->daddr = pkt_dev->cur_daddr;
2739        iph->id = htons(pkt_dev->ip_id);
2740        pkt_dev->ip_id++;
2741        iph->frag_off = 0;
2742        iplen = 20 + 8 + datalen;
2743        iph->tot_len = htons(iplen);
2744        iph->check = 0;
2745        iph->check = ip_fast_csum((void *)iph, iph->ihl);
2746        skb->protocol = protocol;
2747        skb->mac_header = (skb->network_header - ETH_HLEN -
2748                           pkt_dev->pkt_overhead);
2749        skb->dev = odev;
2750        skb->pkt_type = PACKET_HOST;
2751        pktgen_finalize_skb(pkt_dev, skb, datalen);
2752
2753#ifdef CONFIG_XFRM
2754        if (!process_ipsec(pkt_dev, skb, protocol))
2755                return NULL;
2756#endif
2757
2758        return skb;
2759}
2760
2761/*
2762 * scan_ip6, fmt_ip taken from dietlibc-0.21
2763 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2764 *
2765 * Slightly modified for kernel.
2766 * Should be candidate for net/ipv4/utils.c
2767 * --ro
2768 */
2769
2770static unsigned int scan_ip6(const char *s, char ip[16])
2771{
2772        unsigned int i;
2773        unsigned int len = 0;
2774        unsigned long u;
2775        char suffix[16];
2776        unsigned int prefixlen = 0;
2777        unsigned int suffixlen = 0;
2778        __be32 tmp;
2779        char *pos;
2780
2781        for (i = 0; i < 16; i++)
2782                ip[i] = 0;
2783
2784        for (;;) {
2785                if (*s == ':') {
2786                        len++;
2787                        if (s[1] == ':') {      /* Found "::", skip to part 2 */
2788                                s += 2;
2789                                len++;
2790                                break;
2791                        }
2792                        s++;
2793                }
2794
2795                u = simple_strtoul(s, &pos, 16);
2796                i = pos - s;
2797                if (!i)
2798                        return 0;
2799                if (prefixlen == 12 && s[i] == '.') {
2800
2801                        /* the last 4 bytes may be written as IPv4 address */
2802
2803                        tmp = in_aton(s);
2804                        memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2805                        return i + len;
2806                }
2807                ip[prefixlen++] = (u >> 8);
2808                ip[prefixlen++] = (u & 255);
2809                s += i;
2810                len += i;
2811                if (prefixlen == 16)
2812                        return len;
2813        }
2814
2815/* part 2, after "::" */
2816        for (;;) {
2817                if (*s == ':') {
2818                        if (suffixlen == 0)
2819                                break;
2820                        s++;
2821                        len++;
2822                } else if (suffixlen != 0)
2823                        break;
2824
2825                u = simple_strtol(s, &pos, 16);
2826                i = pos - s;
2827                if (!i) {
2828                        if (*s)
2829                                len--;
2830                        break;
2831                }
2832                if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2833                        tmp = in_aton(s);
2834                        memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2835                               sizeof(tmp));
2836                        suffixlen += 4;
2837                        len += strlen(s);
2838                        break;
2839                }
2840                suffix[suffixlen++] = (u >> 8);
2841                suffix[suffixlen++] = (u & 255);
2842                s += i;
2843                len += i;
2844                if (prefixlen + suffixlen == 16)
2845                        break;
2846        }
2847        for (i = 0; i < suffixlen; i++)
2848                ip[16 - suffixlen + i] = suffix[i];
2849        return len;
2850}
2851
2852static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2853                                        struct pktgen_dev *pkt_dev)
2854{
2855        struct sk_buff *skb = NULL;
2856        __u8 *eth;
2857        struct udphdr *udph;
2858        int datalen;
2859        struct ipv6hdr *iph;
2860        __be16 protocol = htons(ETH_P_IPV6);
2861        __be32 *mpls;
2862        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2863        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2864        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2865        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2866        u16 queue_map;
2867
2868        if (pkt_dev->nr_labels)
2869                protocol = htons(ETH_P_MPLS_UC);
2870
2871        if (pkt_dev->vlan_id != 0xffff)
2872                protocol = htons(ETH_P_8021Q);
2873
2874        /* Update any of the values, used when we're incrementing various
2875         * fields.
2876         */
2877        mod_cur_headers(pkt_dev);
2878        queue_map = pkt_dev->cur_queue_map;
2879
2880        skb = __netdev_alloc_skb(odev,
2881                                 pkt_dev->cur_pkt_size + 64
2882                                 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2883        if (!skb) {
2884                sprintf(pkt_dev->result, "No memory");
2885                return NULL;
2886        }
2887        prefetchw(skb->data);
2888
2889        skb_reserve(skb, 16);
2890
2891        /*  Reserve for ethernet and IP header  */
2892        eth = (__u8 *) skb_push(skb, 14);
2893        mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2894        if (pkt_dev->nr_labels)
2895                mpls_push(mpls, pkt_dev);
2896
2897        if (pkt_dev->vlan_id != 0xffff) {
2898                if (pkt_dev->svlan_id != 0xffff) {
2899                        svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2900                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2901                                               pkt_dev->svlan_cfi,
2902                                               pkt_dev->svlan_p);
2903                        svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2904                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2905                }
2906                vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2907                *vlan_tci = build_tci(pkt_dev->vlan_id,
2908                                      pkt_dev->vlan_cfi,
2909                                      pkt_dev->vlan_p);
2910                vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2911                *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2912        }
2913
2914        skb->network_header = skb->tail;
2915        skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2916        skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2917        skb_set_queue_mapping(skb, queue_map);
2918        skb->priority = pkt_dev->skb_priority;
2919        iph = ipv6_hdr(skb);
2920        udph = udp_hdr(skb);
2921
2922        memcpy(eth, pkt_dev->hh, 12);
2923        *(__be16 *) &eth[12] = protocol;
2924
2925        /* Eth + IPh + UDPh + mpls */
2926        datalen = pkt_dev->cur_pkt_size - 14 -
2927                  sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2928                  pkt_dev->pkt_overhead;
2929
2930        if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2931                datalen = sizeof(struct pktgen_hdr);
2932                net_info_ratelimited("increased datalen to %d\n", datalen);
2933        }
2934
2935        udph->source = htons(pkt_dev->cur_udp_src);
2936        udph->dest = htons(pkt_dev->cur_udp_dst);
2937        udph->len = htons(datalen + sizeof(struct udphdr));
2938        udph->check = 0;        /* No checksum */
2939
2940        *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
2941
2942        if (pkt_dev->traffic_class) {
2943                /* Version + traffic class + flow (0) */
2944                *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2945        }
2946
2947        iph->hop_limit = 32;
2948
2949        iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2950        iph->nexthdr = IPPROTO_UDP;
2951
2952        iph->daddr = pkt_dev->cur_in6_daddr;
2953        iph->saddr = pkt_dev->cur_in6_saddr;
2954
2955        skb->mac_header = (skb->network_header - ETH_HLEN -
2956                           pkt_dev->pkt_overhead);
2957        skb->protocol = protocol;
2958        skb->dev = odev;
2959        skb->pkt_type = PACKET_HOST;
2960
2961        pktgen_finalize_skb(pkt_dev, skb, datalen);
2962
2963        return skb;
2964}
2965
2966static struct sk_buff *fill_packet(struct net_device *odev,
2967                                   struct pktgen_dev *pkt_dev)
2968{
2969        if (pkt_dev->flags & F_IPV6)
2970                return fill_packet_ipv6(odev, pkt_dev);
2971        else
2972                return fill_packet_ipv4(odev, pkt_dev);
2973}
2974
2975static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2976{
2977        pkt_dev->seq_num = 1;
2978        pkt_dev->idle_acc = 0;
2979        pkt_dev->sofar = 0;
2980        pkt_dev->tx_bytes = 0;
2981        pkt_dev->errors = 0;
2982}
2983
2984/* Set up structure for sending pkts, clear counters */
2985
2986static void pktgen_run(struct pktgen_thread *t)
2987{
2988        struct pktgen_dev *pkt_dev;
2989        int started = 0;
2990
2991        func_enter();
2992
2993        if_lock(t);
2994        list_for_each_entry(pkt_dev, &t->if_list, list) {
2995
2996                /*
2997                 * setup odev and create initial packet.
2998                 */
2999                pktgen_setup_inject(pkt_dev);
3000
3001                if (pkt_dev->odev) {
3002                        pktgen_clear_counters(pkt_dev);
3003                        pkt_dev->running = 1;   /* Cranke yeself! */
3004                        pkt_dev->skb = NULL;
3005                        pkt_dev->started_at =
3006                                pkt_dev->next_tx = ktime_now();
3007
3008                        set_pkt_overhead(pkt_dev);
3009
3010                        strcpy(pkt_dev->result, "Starting");
3011                        started++;
3012                } else
3013                        strcpy(pkt_dev->result, "Error starting");
3014        }
3015        if_unlock(t);
3016        if (started)
3017                t->control &= ~(T_STOP);
3018}
3019
3020static void pktgen_stop_all_threads_ifs(void)
3021{
3022        struct pktgen_thread *t;
3023
3024        func_enter();
3025
3026        mutex_lock(&pktgen_thread_lock);
3027
3028        list_for_each_entry(t, &pktgen_threads, th_list)
3029                t->control |= T_STOP;
3030
3031        mutex_unlock(&pktgen_thread_lock);
3032}
3033
3034static int thread_is_running(const struct pktgen_thread *t)
3035{
3036        const struct pktgen_dev *pkt_dev;
3037
3038        list_for_each_entry(pkt_dev, &t->if_list, list)
3039                if (pkt_dev->running)
3040                        return 1;
3041        return 0;
3042}
3043
3044static int pktgen_wait_thread_run(struct pktgen_thread *t)
3045{
3046        if_lock(t);
3047
3048        while (thread_is_running(t)) {
3049
3050                if_unlock(t);
3051
3052                msleep_interruptible(100);
3053
3054                if (signal_pending(current))
3055                        goto signal;
3056                if_lock(t);
3057        }
3058        if_unlock(t);
3059        return 1;
3060signal:
3061        return 0;
3062}
3063
3064static int pktgen_wait_all_threads_run(void)
3065{
3066        struct pktgen_thread *t;
3067        int sig = 1;
3068
3069        mutex_lock(&pktgen_thread_lock);
3070
3071        list_for_each_entry(t, &pktgen_threads, th_list) {
3072                sig = pktgen_wait_thread_run(t);
3073                if (sig == 0)
3074                        break;
3075        }
3076
3077        if (sig == 0)
3078                list_for_each_entry(t, &pktgen_threads, th_list)
3079                        t->control |= (T_STOP);
3080
3081        mutex_unlock(&pktgen_thread_lock);
3082        return sig;
3083}
3084
3085static void pktgen_run_all_threads(void)
3086{
3087        struct pktgen_thread *t;
3088
3089        func_enter();
3090
3091        mutex_lock(&pktgen_thread_lock);
3092
3093        list_for_each_entry(t, &pktgen_threads, th_list)
3094                t->control |= (T_RUN);
3095
3096        mutex_unlock(&pktgen_thread_lock);
3097
3098        /* Propagate thread->control  */
3099        schedule_timeout_interruptible(msecs_to_jiffies(125));
3100
3101        pktgen_wait_all_threads_run();
3102}
3103
3104static void pktgen_reset_all_threads(void)
3105{
3106        struct pktgen_thread *t;
3107
3108        func_enter();
3109
3110        mutex_lock(&pktgen_thread_lock);
3111
3112        list_for_each_entry(t, &pktgen_threads, th_list)
3113                t->control |= (T_REMDEVALL);
3114
3115        mutex_unlock(&pktgen_thread_lock);
3116
3117        /* Propagate thread->control  */
3118        schedule_timeout_interruptible(msecs_to_jiffies(125));
3119
3120        pktgen_wait_all_threads_run();
3121}
3122
3123static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3124{
3125        __u64 bps, mbps, pps;
3126        char *p = pkt_dev->result;
3127        ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3128                                    pkt_dev->started_at);
3129        ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3130
3131        p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3132                     (unsigned long long)ktime_to_us(elapsed),
3133                     (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3134                     (unsigned long long)ktime_to_us(idle),
3135                     (unsigned long long)pkt_dev->sofar,
3136                     pkt_dev->cur_pkt_size, nr_frags);
3137
3138        pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3139                        ktime_to_ns(elapsed));
3140
3141        bps = pps * 8 * pkt_dev->cur_pkt_size;
3142
3143        mbps = bps;
3144        do_div(mbps, 1000000);
3145        p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
3146                     (unsigned long long)pps,
3147                     (unsigned long long)mbps,
3148                     (unsigned long long)bps,
3149                     (unsigned long long)pkt_dev->errors);
3150}
3151
3152/* Set stopped-at timer, remove from running list, do counters & statistics */
3153static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3154{
3155        int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3156
3157        if (!pkt_dev->running) {
3158                pr_warning("interface: %s is already stopped\n",
3159                           pkt_dev->odevname);
3160                return -EINVAL;
3161        }
3162
3163        kfree_skb(pkt_dev->skb);
3164        pkt_dev->skb = NULL;
3165        pkt_dev->stopped_at = ktime_now();
3166        pkt_dev->running = 0;
3167
3168        show_results(pkt_dev, nr_frags);
3169
3170        return 0;
3171}
3172
3173static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3174{
3175        struct pktgen_dev *pkt_dev, *best = NULL;
3176
3177        if_lock(t);
3178
3179        list_for_each_entry(pkt_dev, &t->if_list, list) {
3180                if (!pkt_dev->running)
3181                        continue;
3182                if (best == NULL)
3183                        best = pkt_dev;
3184                else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3185                        best = pkt_dev;
3186        }
3187        if_unlock(t);
3188        return best;
3189}
3190
3191static void pktgen_stop(struct pktgen_thread *t)
3192{
3193        struct pktgen_dev *pkt_dev;
3194
3195        func_enter();
3196
3197        if_lock(t);
3198
3199        list_for_each_entry(pkt_dev, &t->if_list, list) {
3200                pktgen_stop_device(pkt_dev);
3201        }
3202
3203        if_unlock(t);
3204}
3205
3206/*
3207 * one of our devices needs to be removed - find it
3208 * and remove it
3209 */
3210static void pktgen_rem_one_if(struct pktgen_thread *t)
3211{
3212        struct list_head *q, *n;
3213        struct pktgen_dev *cur;
3214
3215        func_enter();
3216
3217        if_lock(t);
3218
3219        list_for_each_safe(q, n, &t->if_list) {
3220                cur = list_entry(q, struct pktgen_dev, list);
3221
3222                if (!cur->removal_mark)
3223                        continue;
3224
3225                kfree_skb(cur->skb);
3226                cur->skb = NULL;
3227
3228                pktgen_remove_device(t, cur);
3229
3230                break;
3231        }
3232
3233        if_unlock(t);
3234}
3235
3236static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3237{
3238        struct list_head *q, *n;
3239        struct pktgen_dev *cur;
3240
3241        func_enter();
3242
3243        /* Remove all devices, free mem */
3244
3245        if_lock(t);
3246
3247        list_for_each_safe(q, n, &t->if_list) {
3248                cur = list_entry(q, struct pktgen_dev, list);
3249
3250                kfree_skb(cur->skb);
3251                cur->skb = NULL;
3252
3253                pktgen_remove_device(t, cur);
3254        }
3255
3256        if_unlock(t);
3257}
3258
3259static void pktgen_rem_thread(struct pktgen_thread *t)
3260{
3261        /* Remove from the thread list */
3262
3263        remove_proc_entry(t->tsk->comm, pg_proc_dir);
3264
3265}
3266
3267static void pktgen_resched(struct pktgen_dev *pkt_dev)
3268{
3269        ktime_t idle_start = ktime_now();
3270        schedule();
3271        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3272}
3273
3274static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3275{
3276        ktime_t idle_start = ktime_now();
3277
3278        while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3279                if (signal_pending(current))
3280                        break;
3281
3282                if (need_resched())
3283                        pktgen_resched(pkt_dev);
3284                else
3285                        cpu_relax();
3286        }
3287        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3288}
3289
3290static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3291{
3292        struct net_device *odev = pkt_dev->odev;
3293        netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3294                = odev->netdev_ops->ndo_start_xmit;
3295        struct netdev_queue *txq;
3296        u16 queue_map;
3297        int ret;
3298
3299        /* If device is offline, then don't send */
3300        if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3301                pktgen_stop_device(pkt_dev);
3302                return;
3303        }
3304
3305        /* This is max DELAY, this has special meaning of
3306         * "never transmit"
3307         */
3308        if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3309                pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3310                return;
3311        }
3312
3313        /* If no skb or clone count exhausted then get new one */
3314        if (!pkt_dev->skb || (pkt_dev->last_ok &&
3315                              ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3316                /* build a new pkt */
3317                kfree_skb(pkt_dev->skb);
3318
3319                pkt_dev->skb = fill_packet(odev, pkt_dev);
3320                if (pkt_dev->skb == NULL) {
3321                        pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3322                        schedule();
3323                        pkt_dev->clone_count--; /* back out increment, OOM */
3324                        return;
3325                }
3326                pkt_dev->last_pkt_size = pkt_dev->skb->len;
3327                pkt_dev->allocated_skbs++;
3328                pkt_dev->clone_count = 0;       /* reset counter */
3329        }
3330
3331        if (pkt_dev->delay && pkt_dev->last_ok)
3332                spin(pkt_dev, pkt_dev->next_tx);
3333
3334        queue_map = skb_get_queue_mapping(pkt_dev->skb);
3335        txq = netdev_get_tx_queue(odev, queue_map);
3336
3337        __netif_tx_lock_bh(txq);
3338
3339        if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3340                ret = NETDEV_TX_BUSY;
3341                pkt_dev->last_ok = 0;
3342                goto unlock;
3343        }
3344        atomic_inc(&(pkt_dev->skb->users));
3345        ret = (*xmit)(pkt_dev->skb, odev);
3346
3347        switch (ret) {
3348        case NETDEV_TX_OK:
3349                txq_trans_update(txq);
3350                pkt_dev->last_ok = 1;
3351                pkt_dev->sofar++;
3352                pkt_dev->seq_num++;
3353                pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3354                break;
3355        case NET_XMIT_DROP:
3356        case NET_XMIT_CN:
3357        case NET_XMIT_POLICED:
3358                /* skb has been consumed */
3359                pkt_dev->errors++;
3360                break;
3361        default: /* Drivers are not supposed to return other values! */
3362                net_info_ratelimited("%s xmit error: %d\n",
3363                                     pkt_dev->odevname, ret);
3364                pkt_dev->errors++;
3365                /* fallthru */
3366        case NETDEV_TX_LOCKED:
3367        case NETDEV_TX_BUSY:
3368                /* Retry it next time */
3369                atomic_dec(&(pkt_dev->skb->users));
3370                pkt_dev->last_ok = 0;
3371        }
3372unlock:
3373        __netif_tx_unlock_bh(txq);
3374
3375        /* If pkt_dev->count is zero, then run forever */
3376        if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3377                pktgen_wait_for_skb(pkt_dev);
3378
3379                /* Done with this */
3380                pktgen_stop_device(pkt_dev);
3381        }
3382}
3383
3384/*
3385 * Main loop of the thread goes here
3386 */
3387
3388static int pktgen_thread_worker(void *arg)
3389{
3390        DEFINE_WAIT(wait);
3391        struct pktgen_thread *t = arg;
3392        struct pktgen_dev *pkt_dev = NULL;
3393        int cpu = t->cpu;
3394
3395        BUG_ON(smp_processor_id() != cpu);
3396
3397        init_waitqueue_head(&t->queue);
3398        complete(&t->start_done);
3399
3400        pr_debug("starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
3401
3402        set_current_state(TASK_INTERRUPTIBLE);
3403
3404        set_freezable();
3405
3406        while (!kthread_should_stop()) {
3407                pkt_dev = next_to_run(t);
3408
3409                if (unlikely(!pkt_dev && t->control == 0)) {
3410                        if (pktgen_exiting)
3411                                break;
3412                        wait_event_interruptible_timeout(t->queue,
3413                                                         t->control != 0,
3414                                                         HZ/10);
3415                        try_to_freeze();
3416                        continue;
3417                }
3418
3419                __set_current_state(TASK_RUNNING);
3420
3421                if (likely(pkt_dev)) {
3422                        pktgen_xmit(pkt_dev);
3423
3424                        if (need_resched())
3425                                pktgen_resched(pkt_dev);
3426                        else
3427                                cpu_relax();
3428                }
3429
3430                if (t->control & T_STOP) {
3431                        pktgen_stop(t);
3432                        t->control &= ~(T_STOP);
3433                }
3434
3435                if (t->control & T_RUN) {
3436                        pktgen_run(t);
3437                        t->control &= ~(T_RUN);
3438                }
3439
3440                if (t->control & T_REMDEVALL) {
3441                        pktgen_rem_all_ifs(t);
3442                        t->control &= ~(T_REMDEVALL);
3443                }
3444
3445                if (t->control & T_REMDEV) {
3446                        pktgen_rem_one_if(t);
3447                        t->control &= ~(T_REMDEV);
3448                }
3449
3450                try_to_freeze();
3451
3452                set_current_state(TASK_INTERRUPTIBLE);
3453        }
3454
3455        pr_debug("%s stopping all device\n", t->tsk->comm);
3456        pktgen_stop(t);
3457
3458        pr_debug("%s removing all device\n", t->tsk->comm);
3459        pktgen_rem_all_ifs(t);
3460
3461        pr_debug("%s removing thread\n", t->tsk->comm);
3462        pktgen_rem_thread(t);
3463
3464        /* Wait for kthread_stop */
3465        while (!kthread_should_stop()) {
3466                set_current_state(TASK_INTERRUPTIBLE);
3467                schedule();
3468        }
3469        __set_current_state(TASK_RUNNING);
3470
3471        return 0;
3472}
3473
3474static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3475                                          const char *ifname, bool exact)
3476{
3477        struct pktgen_dev *p, *pkt_dev = NULL;
3478        size_t len = strlen(ifname);
3479
3480        if_lock(t);
3481        list_for_each_entry(p, &t->if_list, list)
3482                if (strncmp(p->odevname, ifname, len) == 0) {
3483                        if (p->odevname[len]) {
3484                                if (exact || p->odevname[len] != '@')
3485                                        continue;
3486                        }
3487                        pkt_dev = p;
3488                        break;
3489                }
3490
3491        if_unlock(t);
3492        pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3493        return pkt_dev;
3494}
3495
3496/*
3497 * Adds a dev at front of if_list.
3498 */
3499
3500static int add_dev_to_thread(struct pktgen_thread *t,
3501                             struct pktgen_dev *pkt_dev)
3502{
3503        int rv = 0;
3504
3505        if_lock(t);
3506
3507        if (pkt_dev->pg_thread) {
3508                pr_err("ERROR: already assigned to a thread\n");
3509                rv = -EBUSY;
3510                goto out;
3511        }
3512
3513        list_add(&pkt_dev->list, &t->if_list);
3514        pkt_dev->pg_thread = t;
3515        pkt_dev->running = 0;
3516
3517out:
3518        if_unlock(t);
3519        return rv;
3520}
3521
3522/* Called under thread lock */
3523
3524static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3525{
3526        struct pktgen_dev *pkt_dev;
3527        int err;
3528        int node = cpu_to_node(t->cpu);
3529
3530        /* We don't allow a device to be on several threads */
3531
3532        pkt_dev = __pktgen_NN_threads(ifname, FIND);
3533        if (pkt_dev) {
3534                pr_err("ERROR: interface already used\n");
3535                return -EBUSY;
3536        }
3537
3538        pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3539        if (!pkt_dev)
3540                return -ENOMEM;
3541
3542        strcpy(pkt_dev->odevname, ifname);
3543        pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3544                                      node);
3545        if (pkt_dev->flows == NULL) {
3546                kfree(pkt_dev);
3547                return -ENOMEM;
3548        }
3549
3550        pkt_dev->removal_mark = 0;
3551        pkt_dev->min_pkt_size = ETH_ZLEN;
3552        pkt_dev->max_pkt_size = ETH_ZLEN;
3553        pkt_dev->nfrags = 0;
3554        pkt_dev->delay = pg_delay_d;
3555        pkt_dev->count = pg_count_d;
3556        pkt_dev->sofar = 0;
3557        pkt_dev->udp_src_min = 9;       /* sink port */
3558        pkt_dev->udp_src_max = 9;
3559        pkt_dev->udp_dst_min = 9;
3560        pkt_dev->udp_dst_max = 9;
3561        pkt_dev->vlan_p = 0;
3562        pkt_dev->vlan_cfi = 0;
3563        pkt_dev->vlan_id = 0xffff;
3564        pkt_dev->svlan_p = 0;
3565        pkt_dev->svlan_cfi = 0;
3566        pkt_dev->svlan_id = 0xffff;
3567        pkt_dev->node = -1;
3568
3569        err = pktgen_setup_dev(pkt_dev, ifname);
3570        if (err)
3571                goto out1;
3572        if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3573                pkt_dev->clone_skb = pg_clone_skb_d;
3574
3575        pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3576                                          &pktgen_if_fops, pkt_dev);
3577        if (!pkt_dev->entry) {
3578                pr_err("cannot create %s/%s procfs entry\n",
3579                       PG_PROC_DIR, ifname);
3580                err = -EINVAL;
3581                goto out2;
3582        }
3583#ifdef CONFIG_XFRM
3584        pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3585        pkt_dev->ipsproto = IPPROTO_ESP;
3586#endif
3587
3588        return add_dev_to_thread(t, pkt_dev);
3589out2:
3590        dev_put(pkt_dev->odev);
3591out1:
3592#ifdef CONFIG_XFRM
3593        free_SAs(pkt_dev);
3594#endif
3595        vfree(pkt_dev->flows);
3596        kfree(pkt_dev);
3597        return err;
3598}
3599
3600static int __init pktgen_create_thread(int cpu)
3601{
3602        struct pktgen_thread *t;
3603        struct proc_dir_entry *pe;
3604        struct task_struct *p;
3605
3606        t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3607                         cpu_to_node(cpu));
3608        if (!t) {
3609                pr_err("ERROR: out of memory, can't create new thread\n");
3610                return -ENOMEM;
3611        }
3612
3613        spin_lock_init(&t->if_lock);
3614        t->cpu = cpu;
3615
3616        INIT_LIST_HEAD(&t->if_list);
3617
3618        list_add_tail(&t->th_list, &pktgen_threads);
3619        init_completion(&t->start_done);
3620
3621        p = kthread_create_on_node(pktgen_thread_worker,
3622                                   t,
3623                                   cpu_to_node(cpu),
3624                                   "kpktgend_%d", cpu);
3625        if (IS_ERR(p)) {
3626                pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3627                list_del(&t->th_list);
3628                kfree(t);
3629                return PTR_ERR(p);
3630        }
3631        kthread_bind(p, cpu);
3632        t->tsk = p;
3633
3634        pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3635                              &pktgen_thread_fops, t);
3636        if (!pe) {
3637                pr_err("cannot create %s/%s procfs entry\n",
3638                       PG_PROC_DIR, t->tsk->comm);
3639                kthread_stop(p);
3640                list_del(&t->th_list);
3641                kfree(t);
3642                return -EINVAL;
3643        }
3644
3645        wake_up_process(p);
3646        wait_for_completion(&t->start_done);
3647
3648        return 0;
3649}
3650
3651/*
3652 * Removes a device from the thread if_list.
3653 */
3654static void _rem_dev_from_if_list(struct pktgen_thread *t,
3655                                  struct pktgen_dev *pkt_dev)
3656{
3657        struct list_head *q, *n;
3658        struct pktgen_dev *p;
3659
3660        list_for_each_safe(q, n, &t->if_list) {
3661                p = list_entry(q, struct pktgen_dev, list);
3662                if (p == pkt_dev)
3663                        list_del(&p->list);
3664        }
3665}
3666
3667static int pktgen_remove_device(struct pktgen_thread *t,
3668                                struct pktgen_dev *pkt_dev)
3669{
3670
3671        pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3672
3673        if (pkt_dev->running) {
3674                pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3675                pktgen_stop_device(pkt_dev);
3676        }
3677
3678        /* Dis-associate from the interface */
3679
3680        if (pkt_dev->odev) {
3681                dev_put(pkt_dev->odev);
3682                pkt_dev->odev = NULL;
3683        }
3684
3685        /* And update the thread if_list */
3686
3687        _rem_dev_from_if_list(t, pkt_dev);
3688
3689        if (pkt_dev->entry)
3690                remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3691
3692#ifdef CONFIG_XFRM
3693        free_SAs(pkt_dev);
3694#endif
3695        vfree(pkt_dev->flows);
3696        if (pkt_dev->page)
3697                put_page(pkt_dev->page);
3698        kfree(pkt_dev);
3699        return 0;
3700}
3701
3702static int __init pg_init(void)
3703{
3704        int cpu;
3705        struct proc_dir_entry *pe;
3706        int ret = 0;
3707
3708        pr_info("%s", version);
3709
3710        pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3711        if (!pg_proc_dir)
3712                return -ENODEV;
3713
3714        pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3715        if (pe == NULL) {
3716                pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3717                ret = -EINVAL;
3718                goto remove_dir;
3719        }
3720
3721        register_netdevice_notifier(&pktgen_notifier_block);
3722
3723        for_each_online_cpu(cpu) {
3724                int err;
3725
3726                err = pktgen_create_thread(cpu);
3727                if (err)
3728                        pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3729                                   cpu, err);
3730        }
3731
3732        if (list_empty(&pktgen_threads)) {
3733                pr_err("ERROR: Initialization failed for all threads\n");
3734                ret = -ENODEV;
3735                goto unregister;
3736        }
3737
3738        return 0;
3739
3740 unregister:
3741        unregister_netdevice_notifier(&pktgen_notifier_block);
3742        remove_proc_entry(PGCTRL, pg_proc_dir);
3743 remove_dir:
3744        proc_net_remove(&init_net, PG_PROC_DIR);
3745        return ret;
3746}
3747
3748static void __exit pg_cleanup(void)
3749{
3750        struct pktgen_thread *t;
3751        struct list_head *q, *n;
3752        LIST_HEAD(list);
3753
3754        /* Stop all interfaces & threads */
3755        pktgen_exiting = true;
3756
3757        mutex_lock(&pktgen_thread_lock);
3758        list_splice_init(&pktgen_threads, &list);
3759        mutex_unlock(&pktgen_thread_lock);
3760
3761        list_for_each_safe(q, n, &list) {
3762                t = list_entry(q, struct pktgen_thread, th_list);
3763                list_del(&t->th_list);
3764                kthread_stop(t->tsk);
3765                kfree(t);
3766        }
3767
3768        /* Un-register us from receiving netdevice events */
3769        unregister_netdevice_notifier(&pktgen_notifier_block);
3770
3771        /* Clean up proc file system */
3772        remove_proc_entry(PGCTRL, pg_proc_dir);
3773        proc_net_remove(&init_net, PG_PROC_DIR);
3774}
3775
3776module_init(pg_init);
3777module_exit(pg_cleanup);
3778
3779MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3780MODULE_DESCRIPTION("Packet Generator tool");
3781MODULE_LICENSE("GPL");
3782MODULE_VERSION(VERSION);
3783module_param(pg_count_d, int, 0);
3784MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3785module_param(pg_delay_d, int, 0);
3786MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3787module_param(pg_clone_skb_d, int, 0);
3788MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3789module_param(debug, int, 0);
3790MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
3791
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