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 L\xC3\xA5\xC3\xA5s <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#include <linux/sys.h>
 119#include <linux/types.h>
 120#include <linux/module.h>
 121#include <linux/moduleparam.h>
 122#include <linux/kernel.h>
 123#include <linux/mutex.h>
 124#include <linux/sched.h>
 125#include <linux/slab.h>
 126#include <linux/vmalloc.h>
 127#include <linux/unistd.h>
 128#include <linux/string.h>
 129#include <linux/ptrace.h>
 130#include <linux/errno.h>
 131#include <linux/ioport.h>
 132#include <linux/interrupt.h>
 133#include <linux/capability.h>
 134#include <linux/freezer.h>
 135#include <linux/delay.h>
 136#include <linux/timer.h>
 137#include <linux/list.h>
 138#include <linux/init.h>
 139#include <linux/skbuff.h>
 140#include <linux/netdevice.h>
 141#include <linux/inet.h>
 142#include <linux/inetdevice.h>
 143#include <linux/rtnetlink.h>
 144#include <linux/if_arp.h>
 145#include <linux/if_vlan.h>
 146#include <linux/in.h>
 147#include <linux/ip.h>
 148#include <linux/ipv6.h>
 149#include <linux/udp.h>
 150#include <linux/proc_fs.h>
 151#include <linux/seq_file.h>
 152#include <linux/wait.h>
 153#include <linux/etherdevice.h>
 154#include <linux/kthread.h>
 155#include <net/net_namespace.h>
 156#include <net/checksum.h>
 157#include <net/ipv6.h>
 158#include <net/addrconf.h>
 159#ifdef CONFIG_XFRM
 160#include <net/xfrm.h>
 161#endif
 162#include <asm/byteorder.h>
 163#include <linux/rcupdate.h>
 164#include <linux/bitops.h>
 165#include <asm/io.h>
 166#include <asm/dma.h>
 167#include <asm/uaccess.h>
 168#include <asm/div64.h>          /* do_div */
 169#include <asm/timex.h>
 170
 171#define VERSION  "pktgen v2.70: Packet Generator for packet performance testing.\n"
 172
 173#define IP_NAME_SZ 32
 174#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
 175#define MPLS_STACK_BOTTOM htonl(0x00000100)
 176
 177/* Device flag bits */
 178#define F_IPSRC_RND   (1<<0)    /* IP-Src Random  */
 179#define F_IPDST_RND   (1<<1)    /* IP-Dst Random  */
 180#define F_UDPSRC_RND  (1<<2)    /* UDP-Src Random */
 181#define F_UDPDST_RND  (1<<3)    /* UDP-Dst Random */
 182#define F_MACSRC_RND  (1<<4)    /* MAC-Src Random */
 183#define F_MACDST_RND  (1<<5)    /* MAC-Dst Random */
 184#define F_TXSIZE_RND  (1<<6)    /* Transmit size is random */
 185#define F_IPV6        (1<<7)    /* Interface in IPV6 Mode */
 186#define F_MPLS_RND    (1<<8)    /* Random MPLS labels */
 187#define F_VID_RND     (1<<9)    /* Random VLAN ID */
 188#define F_SVID_RND    (1<<10)   /* Random SVLAN ID */
 189#define F_FLOW_SEQ    (1<<11)   /* Sequential flows */
 190#define F_IPSEC_ON    (1<<12)   /* ipsec on for flows */
 191#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
 192#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
 193
 194/* Thread control flag bits */
 195#define T_TERMINATE   (1<<0)
 196#define T_STOP        (1<<1)    /* Stop run */
 197#define T_RUN         (1<<2)    /* Start run */
 198#define T_REMDEVALL   (1<<3)    /* Remove all devs */
 199#define T_REMDEV      (1<<4)    /* Remove one dev */
 200
 201/* If lock -- can be removed after some work */
 202#define   if_lock(t)           spin_lock(&(t->if_lock));
 203#define   if_unlock(t)           spin_unlock(&(t->if_lock));
 204
 205/* Used to help with determining the pkts on receive */
 206#define PKTGEN_MAGIC 0xbe9be955
 207#define PG_PROC_DIR "pktgen"
 208#define PGCTRL      "pgctrl"
 209static struct proc_dir_entry *pg_proc_dir = NULL;
 210
 211#define MAX_CFLOWS  65536
 212
 213#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
 214#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
 215
 216struct flow_state {
 217        __be32 cur_daddr;
 218        int count;
 219#ifdef CONFIG_XFRM
 220        struct xfrm_state *x;
 221#endif
 222        __u32 flags;
 223};
 224
 225/* flow flag bits */
 226#define F_INIT   (1<<0)         /* flow has been initialized */
 227
 228struct pktgen_dev {
 229        /*
 230         * Try to keep frequent/infrequent used vars. separated.
 231         */
 232        struct proc_dir_entry *entry;   /* proc file */
 233        struct pktgen_thread *pg_thread;/* the owner */
 234        struct list_head list;          /* Used for chaining in the thread's run-queue */
 235
 236        int running;            /* if this changes to false, the test will stop */
 237
 238        /* If min != max, then we will either do a linear iteration, or
 239         * we will do a random selection from within the range.
 240         */
 241        __u32 flags;
 242        int removal_mark;       /* non-zero => the device is marked for
 243                                 * removal by worker thread */
 244
 245        int min_pkt_size;       /* = ETH_ZLEN; */
 246        int max_pkt_size;       /* = ETH_ZLEN; */
 247        int pkt_overhead;       /* overhead for MPLS, VLANs, IPSEC etc */
 248        int nfrags;
 249        __u32 delay_us;         /* Default delay */
 250        __u32 delay_ns;
 251        __u64 count;            /* Default No packets to send */
 252        __u64 sofar;            /* How many pkts we've sent so far */
 253        __u64 tx_bytes;         /* How many bytes we've transmitted */
 254        __u64 errors;           /* Errors when trying to transmit, pkts will be re-sent */
 255
 256        /* runtime counters relating to clone_skb */
 257        __u64 next_tx_us;       /* timestamp of when to tx next */
 258        __u32 next_tx_ns;
 259
 260        __u64 allocated_skbs;
 261        __u32 clone_count;
 262        int last_ok;            /* Was last skb sent?
 263                                 * Or a failed transmit of some sort?  This will keep
 264                                 * sequence numbers in order, for example.
 265                                 */
 266        __u64 started_at;       /* micro-seconds */
 267        __u64 stopped_at;       /* micro-seconds */
 268        __u64 idle_acc;         /* micro-seconds */
 269        __u32 seq_num;
 270
 271        int clone_skb;          /* Use multiple SKBs during packet gen.  If this number
 272                                 * is greater than 1, then that many copies of the same
 273                                 * packet will be sent before a new packet is allocated.
 274                                 * For instance, if you want to send 1024 identical packets
 275                                 * before creating a new packet, set clone_skb to 1024.
 276                                 */
 277
 278        char dst_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 279        char dst_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 280        char src_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 281        char src_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 282
 283        struct in6_addr in6_saddr;
 284        struct in6_addr in6_daddr;
 285        struct in6_addr cur_in6_daddr;
 286        struct in6_addr cur_in6_saddr;
 287        /* For ranges */
 288        struct in6_addr min_in6_daddr;
 289        struct in6_addr max_in6_daddr;
 290        struct in6_addr min_in6_saddr;
 291        struct in6_addr max_in6_saddr;
 292
 293        /* If we're doing ranges, random or incremental, then this
 294         * defines the min/max for those ranges.
 295         */
 296        __be32 saddr_min;       /* inclusive, source IP address */
 297        __be32 saddr_max;       /* exclusive, source IP address */
 298        __be32 daddr_min;       /* inclusive, dest IP address */
 299        __be32 daddr_max;       /* exclusive, dest IP address */
 300
 301        __u16 udp_src_min;      /* inclusive, source UDP port */
 302        __u16 udp_src_max;      /* exclusive, source UDP port */
 303        __u16 udp_dst_min;      /* inclusive, dest UDP port */
 304        __u16 udp_dst_max;      /* exclusive, dest UDP port */
 305
 306        /* DSCP + ECN */
 307        __u8 tos;            /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
 308        __u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
 309
 310        /* MPLS */
 311        unsigned nr_labels;     /* Depth of stack, 0 = no MPLS */
 312        __be32 labels[MAX_MPLS_LABELS];
 313
 314        /* VLAN/SVLAN (802.1Q/Q-in-Q) */
 315        __u8  vlan_p;
 316        __u8  vlan_cfi;
 317        __u16 vlan_id;  /* 0xffff means no vlan tag */
 318
 319        __u8  svlan_p;
 320        __u8  svlan_cfi;
 321        __u16 svlan_id; /* 0xffff means no svlan tag */
 322
 323        __u32 src_mac_count;    /* How many MACs to iterate through */
 324        __u32 dst_mac_count;    /* How many MACs to iterate through */
 325
 326        unsigned char dst_mac[ETH_ALEN];
 327        unsigned char src_mac[ETH_ALEN];
 328
 329        __u32 cur_dst_mac_offset;
 330        __u32 cur_src_mac_offset;
 331        __be32 cur_saddr;
 332        __be32 cur_daddr;
 333        __u16 cur_udp_dst;
 334        __u16 cur_udp_src;
 335        __u16 cur_queue_map;
 336        __u32 cur_pkt_size;
 337
 338        __u8 hh[14];
 339        /* = {
 340           0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
 341
 342           We fill in SRC address later
 343           0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 344           0x08, 0x00
 345           };
 346         */
 347        __u16 pad;              /* pad out the hh struct to an even 16 bytes */
 348
 349        struct sk_buff *skb;    /* skb we are to transmit next, mainly used for when we
 350                                 * are transmitting the same one multiple times
 351                                 */
 352        struct net_device *odev;        /* The out-going device.  Note that the device should
 353                                         * have it's pg_info pointer pointing back to this
 354                                         * device.  This will be set when the user specifies
 355                                         * the out-going device name (not when the inject is
 356                                         * started as it used to do.)
 357                                         */
 358        struct flow_state *flows;
 359        unsigned cflows;        /* Concurrent flows (config) */
 360        unsigned lflow;         /* Flow length  (config) */
 361        unsigned nflows;        /* accumulated flows (stats) */
 362        unsigned curfl;         /* current sequenced flow (state)*/
 363
 364        u16 queue_map_min;
 365        u16 queue_map_max;
 366
 367#ifdef CONFIG_XFRM
 368        __u8    ipsmode;                /* IPSEC mode (config) */
 369        __u8    ipsproto;               /* IPSEC type (config) */
 370#endif
 371        char result[512];
 372};
 373
 374struct pktgen_hdr {
 375        __be32 pgh_magic;
 376        __be32 seq_num;
 377        __be32 tv_sec;
 378        __be32 tv_usec;
 379};
 380
 381struct pktgen_thread {
 382        spinlock_t if_lock;
 383        struct list_head if_list;       /* All device here */
 384        struct list_head th_list;
 385        struct task_struct *tsk;
 386        char result[512];
 387
 388        /* Field for thread to receive "posted" events terminate, stop ifs etc. */
 389
 390        u32 control;
 391        int cpu;
 392
 393        wait_queue_head_t queue;
 394        struct completion start_done;
 395};
 396
 397#define REMOVE 1
 398#define FIND   0
 399
 400/** Convert to micro-seconds */
 401static inline __u64 tv_to_us(const struct timeval *tv)
 402{
 403        __u64 us = tv->tv_usec;
 404        us += (__u64) tv->tv_sec * (__u64) 1000000;
 405        return us;
 406}
 407
 408static __u64 getCurUs(void)
 409{
 410        struct timeval tv;
 411        do_gettimeofday(&tv);
 412        return tv_to_us(&tv);
 413}
 414
 415/* old include end */
 416
 417static char version[] __initdata = VERSION;
 418
 419static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
 420static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
 421static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
 422                                          const char *ifname);
 423static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
 424static void pktgen_run_all_threads(void);
 425static void pktgen_reset_all_threads(void);
 426static void pktgen_stop_all_threads_ifs(void);
 427static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
 428static void pktgen_stop(struct pktgen_thread *t);
 429static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
 430
 431static unsigned int scan_ip6(const char *s, char ip[16]);
 432static unsigned int fmt_ip6(char *s, const char ip[16]);
 433
 434/* Module parameters, defaults. */
 435static int pg_count_d = 1000;   /* 1000 pkts by default */
 436static int pg_delay_d;
 437static int pg_clone_skb_d;
 438static int debug;
 439
 440static DEFINE_MUTEX(pktgen_thread_lock);
 441static LIST_HEAD(pktgen_threads);
 442
 443static struct notifier_block pktgen_notifier_block = {
 444        .notifier_call = pktgen_device_event,
 445};
 446
 447/*
 448 * /proc handling functions
 449 *
 450 */
 451
 452static int pgctrl_show(struct seq_file *seq, void *v)
 453{
 454        seq_puts(seq, VERSION);
 455        return 0;
 456}
 457
 458static ssize_t pgctrl_write(struct file *file, const char __user * buf,
 459                            size_t count, loff_t * ppos)
 460{
 461        int err = 0;
 462        char data[128];
 463
 464        if (!capable(CAP_NET_ADMIN)) {
 465                err = -EPERM;
 466                goto out;
 467        }
 468
 469        if (count > sizeof(data))
 470                count = sizeof(data);
 471
 472        if (copy_from_user(data, buf, count)) {
 473                err = -EFAULT;
 474                goto out;
 475        }
 476        data[count - 1] = 0;    /* Make string */
 477
 478        if (!strcmp(data, "stop"))
 479                pktgen_stop_all_threads_ifs();
 480
 481        else if (!strcmp(data, "start"))
 482                pktgen_run_all_threads();
 483
 484        else if (!strcmp(data, "reset"))
 485                pktgen_reset_all_threads();
 486
 487        else
 488                printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
 489
 490        err = count;
 491
 492out:
 493        return err;
 494}
 495
 496static int pgctrl_open(struct inode *inode, struct file *file)
 497{
 498        return single_open(file, pgctrl_show, PDE(inode)->data);
 499}
 500
 501static const struct file_operations pktgen_fops = {
 502        .owner   = THIS_MODULE,
 503        .open    = pgctrl_open,
 504        .read    = seq_read,
 505        .llseek  = seq_lseek,
 506        .write   = pgctrl_write,
 507        .release = single_release,
 508};
 509
 510static int pktgen_if_show(struct seq_file *seq, void *v)
 511{
 512        struct pktgen_dev *pkt_dev = seq->private;
 513        __u64 sa;
 514        __u64 stopped;
 515        __u64 now = getCurUs();
 516
 517        seq_printf(seq,
 518                   "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
 519                   (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
 520                   pkt_dev->max_pkt_size);
 521
 522        seq_printf(seq,
 523                   "     frags: %d  delay: %u  clone_skb: %d  ifname: %s\n",
 524                   pkt_dev->nfrags,
 525                   1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
 526                   pkt_dev->clone_skb, pkt_dev->odev->name);
 527
 528        seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
 529                   pkt_dev->lflow);
 530
 531        seq_printf(seq,
 532                   "     queue_map_min: %u  queue_map_max: %u\n",
 533                   pkt_dev->queue_map_min,
 534                   pkt_dev->queue_map_max);
 535
 536        if (pkt_dev->flags & F_IPV6) {
 537                char b1[128], b2[128], b3[128];
 538                fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
 539                fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
 540                fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
 541                seq_printf(seq,
 542                           "     saddr: %s  min_saddr: %s  max_saddr: %s\n", b1,
 543                           b2, b3);
 544
 545                fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
 546                fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
 547                fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
 548                seq_printf(seq,
 549                           "     daddr: %s  min_daddr: %s  max_daddr: %s\n", b1,
 550                           b2, b3);
 551
 552        } else
 553                seq_printf(seq,
 554                           "     dst_min: %s  dst_max: %s\n     src_min: %s  src_max: %s\n",
 555                           pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
 556                           pkt_dev->src_max);
 557
 558        seq_puts(seq, "     src_mac: ");
 559
 560        seq_printf(seq, "%pM ",
 561                   is_zero_ether_addr(pkt_dev->src_mac) ?
 562                             pkt_dev->odev->dev_addr : pkt_dev->src_mac);
 563
 564        seq_printf(seq, "dst_mac: ");
 565        seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
 566
 567        seq_printf(seq,
 568                   "     udp_src_min: %d  udp_src_max: %d  udp_dst_min: %d  udp_dst_max: %d\n",
 569                   pkt_dev->udp_src_min, pkt_dev->udp_src_max,
 570                   pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
 571
 572        seq_printf(seq,
 573                   "     src_mac_count: %d  dst_mac_count: %d\n",
 574                   pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
 575
 576        if (pkt_dev->nr_labels) {
 577                unsigned i;
 578                seq_printf(seq, "     mpls: ");
 579                for (i = 0; i < pkt_dev->nr_labels; i++)
 580                        seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
 581                                   i == pkt_dev->nr_labels-1 ? "\n" : ", ");
 582        }
 583
 584        if (pkt_dev->vlan_id != 0xffff) {
 585                seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 586                           pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
 587        }
 588
 589        if (pkt_dev->svlan_id != 0xffff) {
 590                seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 591                           pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
 592        }
 593
 594        if (pkt_dev->tos) {
 595                seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
 596        }
 597
 598        if (pkt_dev->traffic_class) {
 599                seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
 600        }
 601
 602        seq_printf(seq, "     Flags: ");
 603
 604        if (pkt_dev->flags & F_IPV6)
 605                seq_printf(seq, "IPV6  ");
 606
 607        if (pkt_dev->flags & F_IPSRC_RND)
 608                seq_printf(seq, "IPSRC_RND  ");
 609
 610        if (pkt_dev->flags & F_IPDST_RND)
 611                seq_printf(seq, "IPDST_RND  ");
 612
 613        if (pkt_dev->flags & F_TXSIZE_RND)
 614                seq_printf(seq, "TXSIZE_RND  ");
 615
 616        if (pkt_dev->flags & F_UDPSRC_RND)
 617                seq_printf(seq, "UDPSRC_RND  ");
 618
 619        if (pkt_dev->flags & F_UDPDST_RND)
 620                seq_printf(seq, "UDPDST_RND  ");
 621
 622        if (pkt_dev->flags & F_MPLS_RND)
 623                seq_printf(seq,  "MPLS_RND  ");
 624
 625        if (pkt_dev->flags & F_QUEUE_MAP_RND)
 626                seq_printf(seq,  "QUEUE_MAP_RND  ");
 627
 628        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
 629                seq_printf(seq,  "QUEUE_MAP_CPU  ");
 630
 631        if (pkt_dev->cflows) {
 632                if (pkt_dev->flags & F_FLOW_SEQ)
 633                        seq_printf(seq,  "FLOW_SEQ  "); /*in sequence flows*/
 634                else
 635                        seq_printf(seq,  "FLOW_RND  ");
 636        }
 637
 638#ifdef CONFIG_XFRM
 639        if (pkt_dev->flags & F_IPSEC_ON)
 640                seq_printf(seq,  "IPSEC  ");
 641#endif
 642
 643        if (pkt_dev->flags & F_MACSRC_RND)
 644                seq_printf(seq, "MACSRC_RND  ");
 645
 646        if (pkt_dev->flags & F_MACDST_RND)
 647                seq_printf(seq, "MACDST_RND  ");
 648
 649        if (pkt_dev->flags & F_VID_RND)
 650                seq_printf(seq, "VID_RND  ");
 651
 652        if (pkt_dev->flags & F_SVID_RND)
 653                seq_printf(seq, "SVID_RND  ");
 654
 655        seq_puts(seq, "\n");
 656
 657        sa = pkt_dev->started_at;
 658        stopped = pkt_dev->stopped_at;
 659        if (pkt_dev->running)
 660                stopped = now;  /* not really stopped, more like last-running-at */
 661
 662        seq_printf(seq,
 663                   "Current:\n     pkts-sofar: %llu  errors: %llu\n     started: %lluus  stopped: %lluus idle: %lluus\n",
 664                   (unsigned long long)pkt_dev->sofar,
 665                   (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
 666                   (unsigned long long)stopped,
 667                   (unsigned long long)pkt_dev->idle_acc);
 668
 669        seq_printf(seq,
 670                   "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
 671                   pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
 672                   pkt_dev->cur_src_mac_offset);
 673
 674        if (pkt_dev->flags & F_IPV6) {
 675                char b1[128], b2[128];
 676                fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
 677                fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
 678                seq_printf(seq, "     cur_saddr: %s  cur_daddr: %s\n", b2, b1);
 679        } else
 680                seq_printf(seq, "     cur_saddr: 0x%x  cur_daddr: 0x%x\n",
 681                           pkt_dev->cur_saddr, pkt_dev->cur_daddr);
 682
 683        seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
 684                   pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
 685
 686        seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
 687
 688        seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
 689
 690        if (pkt_dev->result[0])
 691                seq_printf(seq, "Result: %s\n", pkt_dev->result);
 692        else
 693                seq_printf(seq, "Result: Idle\n");
 694
 695        return 0;
 696}
 697
 698
 699static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
 700{
 701        int i = 0;
 702        *num = 0;
 703
 704        for (; i < maxlen; i++) {
 705                char c;
 706                *num <<= 4;
 707                if (get_user(c, &user_buffer[i]))
 708                        return -EFAULT;
 709                if ((c >= '0') && (c <= '9'))
 710                        *num |= c - '0';
 711                else if ((c >= 'a') && (c <= 'f'))
 712                        *num |= c - 'a' + 10;
 713                else if ((c >= 'A') && (c <= 'F'))
 714                        *num |= c - 'A' + 10;
 715                else
 716                        break;
 717        }
 718        return i;
 719}
 720
 721static int count_trail_chars(const char __user * user_buffer,
 722                             unsigned int maxlen)
 723{
 724        int i;
 725
 726        for (i = 0; i < maxlen; i++) {
 727                char c;
 728                if (get_user(c, &user_buffer[i]))
 729                        return -EFAULT;
 730                switch (c) {
 731                case '\"':
 732                case '\n':
 733                case '\r':
 734                case '\t':
 735                case ' ':
 736                case '=':
 737                        break;
 738                default:
 739                        goto done;
 740                }
 741        }
 742done:
 743        return i;
 744}
 745
 746static unsigned long num_arg(const char __user * user_buffer,
 747                             unsigned long maxlen, unsigned long *num)
 748{
 749        int i = 0;
 750        *num = 0;
 751
 752        for (; i < maxlen; i++) {
 753                char c;
 754                if (get_user(c, &user_buffer[i]))
 755                        return -EFAULT;
 756                if ((c >= '0') && (c <= '9')) {
 757                        *num *= 10;
 758                        *num += c - '0';
 759                } else
 760                        break;
 761        }
 762        return i;
 763}
 764
 765static int strn_len(const char __user * user_buffer, unsigned int maxlen)
 766{
 767        int i = 0;
 768
 769        for (; i < maxlen; i++) {
 770                char c;
 771                if (get_user(c, &user_buffer[i]))
 772                        return -EFAULT;
 773                switch (c) {
 774                case '\"':
 775                case '\n':
 776                case '\r':
 777                case '\t':
 778                case ' ':
 779                        goto done_str;
 780                        break;
 781                default:
 782                        break;
 783                }
 784        }
 785done_str:
 786        return i;
 787}
 788
 789static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
 790{
 791        unsigned n = 0;
 792        char c;
 793        ssize_t i = 0;
 794        int len;
 795
 796        pkt_dev->nr_labels = 0;
 797        do {
 798                __u32 tmp;
 799                len = hex32_arg(&buffer[i], 8, &tmp);
 800                if (len <= 0)
 801                        return len;
 802                pkt_dev->labels[n] = htonl(tmp);
 803                if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
 804                        pkt_dev->flags |= F_MPLS_RND;
 805                i += len;
 806                if (get_user(c, &buffer[i]))
 807                        return -EFAULT;
 808                i++;
 809                n++;
 810                if (n >= MAX_MPLS_LABELS)
 811                        return -E2BIG;
 812        } while (c == ',');
 813
 814        pkt_dev->nr_labels = n;
 815        return i;
 816}
 817
 818static ssize_t pktgen_if_write(struct file *file,
 819                               const char __user * user_buffer, size_t count,
 820                               loff_t * offset)
 821{
 822        struct seq_file *seq = (struct seq_file *)file->private_data;
 823        struct pktgen_dev *pkt_dev = seq->private;
 824        int i = 0, max, len;
 825        char name[16], valstr[32];
 826        unsigned long value = 0;
 827        char *pg_result = NULL;
 828        int tmp = 0;
 829        char buf[128];
 830
 831        pg_result = &(pkt_dev->result[0]);
 832
 833        if (count < 1) {
 834                printk(KERN_WARNING "pktgen: wrong command format\n");
 835                return -EINVAL;
 836        }
 837
 838        max = count - i;
 839        tmp = count_trail_chars(&user_buffer[i], max);
 840        if (tmp < 0) {
 841                printk(KERN_WARNING "pktgen: illegal format\n");
 842                return tmp;
 843        }
 844        i += tmp;
 845
 846        /* Read variable name */
 847
 848        len = strn_len(&user_buffer[i], sizeof(name) - 1);
 849        if (len < 0) {
 850                return len;
 851        }
 852        memset(name, 0, sizeof(name));
 853        if (copy_from_user(name, &user_buffer[i], len))
 854                return -EFAULT;
 855        i += len;
 856
 857        max = count - i;
 858        len = count_trail_chars(&user_buffer[i], max);
 859        if (len < 0)
 860                return len;
 861
 862        i += len;
 863
 864        if (debug) {
 865                char tb[count + 1];
 866                if (copy_from_user(tb, user_buffer, count))
 867                        return -EFAULT;
 868                tb[count] = 0;
 869                printk(KERN_DEBUG "pktgen: %s,%lu  buffer -:%s:-\n", name,
 870                       (unsigned long)count, tb);
 871        }
 872
 873        if (!strcmp(name, "min_pkt_size")) {
 874                len = num_arg(&user_buffer[i], 10, &value);
 875                if (len < 0) {
 876                        return len;
 877                }
 878                i += len;
 879                if (value < 14 + 20 + 8)
 880                        value = 14 + 20 + 8;
 881                if (value != pkt_dev->min_pkt_size) {
 882                        pkt_dev->min_pkt_size = value;
 883                        pkt_dev->cur_pkt_size = value;
 884                }
 885                sprintf(pg_result, "OK: min_pkt_size=%u",
 886                        pkt_dev->min_pkt_size);
 887                return count;
 888        }
 889
 890        if (!strcmp(name, "max_pkt_size")) {
 891                len = num_arg(&user_buffer[i], 10, &value);
 892                if (len < 0) {
 893                        return len;
 894                }
 895                i += len;
 896                if (value < 14 + 20 + 8)
 897                        value = 14 + 20 + 8;
 898                if (value != pkt_dev->max_pkt_size) {
 899                        pkt_dev->max_pkt_size = value;
 900                        pkt_dev->cur_pkt_size = value;
 901                }
 902                sprintf(pg_result, "OK: max_pkt_size=%u",
 903                        pkt_dev->max_pkt_size);
 904                return count;
 905        }
 906
 907        /* Shortcut for min = max */
 908
 909        if (!strcmp(name, "pkt_size")) {
 910                len = num_arg(&user_buffer[i], 10, &value);
 911                if (len < 0) {
 912                        return len;
 913                }
 914                i += len;
 915                if (value < 14 + 20 + 8)
 916                        value = 14 + 20 + 8;
 917                if (value != pkt_dev->min_pkt_size) {
 918                        pkt_dev->min_pkt_size = value;
 919                        pkt_dev->max_pkt_size = value;
 920                        pkt_dev->cur_pkt_size = value;
 921                }
 922                sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
 923                return count;
 924        }
 925
 926        if (!strcmp(name, "debug")) {
 927                len = num_arg(&user_buffer[i], 10, &value);
 928                if (len < 0) {
 929                        return len;
 930                }
 931                i += len;
 932                debug = value;
 933                sprintf(pg_result, "OK: debug=%u", debug);
 934                return count;
 935        }
 936
 937        if (!strcmp(name, "frags")) {
 938                len = num_arg(&user_buffer[i], 10, &value);
 939                if (len < 0) {
 940                        return len;
 941                }
 942                i += len;
 943                pkt_dev->nfrags = value;
 944                sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
 945                return count;
 946        }
 947        if (!strcmp(name, "delay")) {
 948                len = num_arg(&user_buffer[i], 10, &value);
 949                if (len < 0) {
 950                        return len;
 951                }
 952                i += len;
 953                if (value == 0x7FFFFFFF) {
 954                        pkt_dev->delay_us = 0x7FFFFFFF;
 955                        pkt_dev->delay_ns = 0;
 956                } else {
 957                        pkt_dev->delay_us = value / 1000;
 958                        pkt_dev->delay_ns = value % 1000;
 959                }
 960                sprintf(pg_result, "OK: delay=%u",
 961                        1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
 962                return count;
 963        }
 964        if (!strcmp(name, "udp_src_min")) {
 965                len = num_arg(&user_buffer[i], 10, &value);
 966                if (len < 0) {
 967                        return len;
 968                }
 969                i += len;
 970                if (value != pkt_dev->udp_src_min) {
 971                        pkt_dev->udp_src_min = value;
 972                        pkt_dev->cur_udp_src = value;
 973                }
 974                sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
 975                return count;
 976        }
 977        if (!strcmp(name, "udp_dst_min")) {
 978                len = num_arg(&user_buffer[i], 10, &value);
 979                if (len < 0) {
 980                        return len;
 981                }
 982                i += len;
 983                if (value != pkt_dev->udp_dst_min) {
 984                        pkt_dev->udp_dst_min = value;
 985                        pkt_dev->cur_udp_dst = value;
 986                }
 987                sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
 988                return count;
 989        }
 990        if (!strcmp(name, "udp_src_max")) {
 991                len = num_arg(&user_buffer[i], 10, &value);
 992                if (len < 0) {
 993                        return len;
 994                }
 995                i += len;
 996                if (value != pkt_dev->udp_src_max) {
 997                        pkt_dev->udp_src_max = value;
 998                        pkt_dev->cur_udp_src = value;
 999                }
1000                sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1001                return count;
1002        }
1003        if (!strcmp(name, "udp_dst_max")) {
1004                len = num_arg(&user_buffer[i], 10, &value);
1005                if (len < 0) {
1006                        return len;
1007                }
1008                i += len;
1009                if (value != pkt_dev->udp_dst_max) {
1010                        pkt_dev->udp_dst_max = value;
1011                        pkt_dev->cur_udp_dst = value;
1012                }
1013                sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1014                return count;
1015        }
1016        if (!strcmp(name, "clone_skb")) {
1017                len = num_arg(&user_buffer[i], 10, &value);
1018                if (len < 0) {
1019                        return len;
1020                }
1021                i += len;
1022                pkt_dev->clone_skb = value;
1023
1024                sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1025                return count;
1026        }
1027        if (!strcmp(name, "count")) {
1028                len = num_arg(&user_buffer[i], 10, &value);
1029                if (len < 0) {
1030                        return len;
1031                }
1032                i += len;
1033                pkt_dev->count = value;
1034                sprintf(pg_result, "OK: count=%llu",
1035                        (unsigned long long)pkt_dev->count);
1036                return count;
1037        }
1038        if (!strcmp(name, "src_mac_count")) {
1039                len = num_arg(&user_buffer[i], 10, &value);
1040                if (len < 0) {
1041                        return len;
1042                }
1043                i += len;
1044                if (pkt_dev->src_mac_count != value) {
1045                        pkt_dev->src_mac_count = value;
1046                        pkt_dev->cur_src_mac_offset = 0;
1047                }
1048                sprintf(pg_result, "OK: src_mac_count=%d",
1049                        pkt_dev->src_mac_count);
1050                return count;
1051        }
1052        if (!strcmp(name, "dst_mac_count")) {
1053                len = num_arg(&user_buffer[i], 10, &value);
1054                if (len < 0) {
1055                        return len;
1056                }
1057                i += len;
1058                if (pkt_dev->dst_mac_count != value) {
1059                        pkt_dev->dst_mac_count = value;
1060                        pkt_dev->cur_dst_mac_offset = 0;
1061                }
1062                sprintf(pg_result, "OK: dst_mac_count=%d",
1063                        pkt_dev->dst_mac_count);
1064                return count;
1065        }
1066        if (!strcmp(name, "flag")) {
1067                char f[32];
1068                memset(f, 0, 32);
1069                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1070                if (len < 0) {
1071                        return len;
1072                }
1073                if (copy_from_user(f, &user_buffer[i], len))
1074                        return -EFAULT;
1075                i += len;
1076                if (strcmp(f, "IPSRC_RND") == 0)
1077                        pkt_dev->flags |= F_IPSRC_RND;
1078
1079                else if (strcmp(f, "!IPSRC_RND") == 0)
1080                        pkt_dev->flags &= ~F_IPSRC_RND;
1081
1082                else if (strcmp(f, "TXSIZE_RND") == 0)
1083                        pkt_dev->flags |= F_TXSIZE_RND;
1084
1085                else if (strcmp(f, "!TXSIZE_RND") == 0)
1086                        pkt_dev->flags &= ~F_TXSIZE_RND;
1087
1088                else if (strcmp(f, "IPDST_RND") == 0)
1089                        pkt_dev->flags |= F_IPDST_RND;
1090
1091                else if (strcmp(f, "!IPDST_RND") == 0)
1092                        pkt_dev->flags &= ~F_IPDST_RND;
1093
1094                else if (strcmp(f, "UDPSRC_RND") == 0)
1095                        pkt_dev->flags |= F_UDPSRC_RND;
1096
1097                else if (strcmp(f, "!UDPSRC_RND") == 0)
1098                        pkt_dev->flags &= ~F_UDPSRC_RND;
1099
1100                else if (strcmp(f, "UDPDST_RND") == 0)
1101                        pkt_dev->flags |= F_UDPDST_RND;
1102
1103                else if (strcmp(f, "!UDPDST_RND") == 0)
1104                        pkt_dev->flags &= ~F_UDPDST_RND;
1105
1106                else if (strcmp(f, "MACSRC_RND") == 0)
1107                        pkt_dev->flags |= F_MACSRC_RND;
1108
1109                else if (strcmp(f, "!MACSRC_RND") == 0)
1110                        pkt_dev->flags &= ~F_MACSRC_RND;
1111
1112                else if (strcmp(f, "MACDST_RND") == 0)
1113                        pkt_dev->flags |= F_MACDST_RND;
1114
1115                else if (strcmp(f, "!MACDST_RND") == 0)
1116                        pkt_dev->flags &= ~F_MACDST_RND;
1117
1118                else if (strcmp(f, "MPLS_RND") == 0)
1119                        pkt_dev->flags |= F_MPLS_RND;
1120
1121                else if (strcmp(f, "!MPLS_RND") == 0)
1122                        pkt_dev->flags &= ~F_MPLS_RND;
1123
1124                else if (strcmp(f, "VID_RND") == 0)
1125                        pkt_dev->flags |= F_VID_RND;
1126
1127                else if (strcmp(f, "!VID_RND") == 0)
1128                        pkt_dev->flags &= ~F_VID_RND;
1129
1130                else if (strcmp(f, "SVID_RND") == 0)
1131                        pkt_dev->flags |= F_SVID_RND;
1132
1133                else if (strcmp(f, "!SVID_RND") == 0)
1134                        pkt_dev->flags &= ~F_SVID_RND;
1135
1136                else if (strcmp(f, "FLOW_SEQ") == 0)
1137                        pkt_dev->flags |= F_FLOW_SEQ;
1138
1139                else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1140                        pkt_dev->flags |= F_QUEUE_MAP_RND;
1141
1142                else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1143                        pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1144
1145                else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1146                        pkt_dev->flags |= F_QUEUE_MAP_CPU;
1147
1148                else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1149                        pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1150#ifdef CONFIG_XFRM
1151                else if (strcmp(f, "IPSEC") == 0)
1152                        pkt_dev->flags |= F_IPSEC_ON;
1153#endif
1154
1155                else if (strcmp(f, "!IPV6") == 0)
1156                        pkt_dev->flags &= ~F_IPV6;
1157
1158                else {
1159                        sprintf(pg_result,
1160                                "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1161                                f,
1162                                "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1163                                "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1164                        return count;
1165                }
1166                sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1167                return count;
1168        }
1169        if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1170                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1171                if (len < 0) {
1172                        return len;
1173                }
1174
1175                if (copy_from_user(buf, &user_buffer[i], len))
1176                        return -EFAULT;
1177                buf[len] = 0;
1178                if (strcmp(buf, pkt_dev->dst_min) != 0) {
1179                        memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1180                        strncpy(pkt_dev->dst_min, buf, len);
1181                        pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1182                        pkt_dev->cur_daddr = pkt_dev->daddr_min;
1183                }
1184                if (debug)
1185                        printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1186                               pkt_dev->dst_min);
1187                i += len;
1188                sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1189                return count;
1190        }
1191        if (!strcmp(name, "dst_max")) {
1192                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1193                if (len < 0) {
1194                        return len;
1195                }
1196
1197                if (copy_from_user(buf, &user_buffer[i], len))
1198                        return -EFAULT;
1199
1200                buf[len] = 0;
1201                if (strcmp(buf, pkt_dev->dst_max) != 0) {
1202                        memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1203                        strncpy(pkt_dev->dst_max, buf, len);
1204                        pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1205                        pkt_dev->cur_daddr = pkt_dev->daddr_max;
1206                }
1207                if (debug)
1208                        printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1209                               pkt_dev->dst_max);
1210                i += len;
1211                sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1212                return count;
1213        }
1214        if (!strcmp(name, "dst6")) {
1215                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1216                if (len < 0)
1217                        return len;
1218
1219                pkt_dev->flags |= F_IPV6;
1220
1221                if (copy_from_user(buf, &user_buffer[i], len))
1222                        return -EFAULT;
1223                buf[len] = 0;
1224
1225                scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1226                fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1227
1228                ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1229
1230                if (debug)
1231                        printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1232
1233                i += len;
1234                sprintf(pg_result, "OK: dst6=%s", buf);
1235                return count;
1236        }
1237        if (!strcmp(name, "dst6_min")) {
1238                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1239                if (len < 0)
1240                        return len;
1241
1242                pkt_dev->flags |= F_IPV6;
1243
1244                if (copy_from_user(buf, &user_buffer[i], len))
1245                        return -EFAULT;
1246                buf[len] = 0;
1247
1248                scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1249                fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1250
1251                ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1252                               &pkt_dev->min_in6_daddr);
1253                if (debug)
1254                        printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1255
1256                i += len;
1257                sprintf(pg_result, "OK: dst6_min=%s", buf);
1258                return count;
1259        }
1260        if (!strcmp(name, "dst6_max")) {
1261                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1262                if (len < 0)
1263                        return len;
1264
1265                pkt_dev->flags |= F_IPV6;
1266
1267                if (copy_from_user(buf, &user_buffer[i], len))
1268                        return -EFAULT;
1269                buf[len] = 0;
1270
1271                scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1272                fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1273
1274                if (debug)
1275                        printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1276
1277                i += len;
1278                sprintf(pg_result, "OK: dst6_max=%s", buf);
1279                return count;
1280        }
1281        if (!strcmp(name, "src6")) {
1282                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1283                if (len < 0)
1284                        return len;
1285
1286                pkt_dev->flags |= F_IPV6;
1287
1288                if (copy_from_user(buf, &user_buffer[i], len))
1289                        return -EFAULT;
1290                buf[len] = 0;
1291
1292                scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1293                fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1294
1295                ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1296
1297                if (debug)
1298                        printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1299
1300                i += len;
1301                sprintf(pg_result, "OK: src6=%s", buf);
1302                return count;
1303        }
1304        if (!strcmp(name, "src_min")) {
1305                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1306                if (len < 0) {
1307                        return len;
1308                }
1309                if (copy_from_user(buf, &user_buffer[i], len))
1310                        return -EFAULT;
1311                buf[len] = 0;
1312                if (strcmp(buf, pkt_dev->src_min) != 0) {
1313                        memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1314                        strncpy(pkt_dev->src_min, buf, len);
1315                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1316                        pkt_dev->cur_saddr = pkt_dev->saddr_min;
1317                }
1318                if (debug)
1319                        printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1320                               pkt_dev->src_min);
1321                i += len;
1322                sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1323                return count;
1324        }
1325        if (!strcmp(name, "src_max")) {
1326                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1327                if (len < 0) {
1328                        return len;
1329                }
1330                if (copy_from_user(buf, &user_buffer[i], len))
1331                        return -EFAULT;
1332                buf[len] = 0;
1333                if (strcmp(buf, pkt_dev->src_max) != 0) {
1334                        memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1335                        strncpy(pkt_dev->src_max, buf, len);
1336                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1337                        pkt_dev->cur_saddr = pkt_dev->saddr_max;
1338                }
1339                if (debug)
1340                        printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1341                               pkt_dev->src_max);
1342                i += len;
1343                sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1344                return count;
1345        }
1346        if (!strcmp(name, "dst_mac")) {
1347                char *v = valstr;
1348                unsigned char old_dmac[ETH_ALEN];
1349                unsigned char *m = pkt_dev->dst_mac;
1350                memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1351
1352                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1353                if (len < 0) {
1354                        return len;
1355                }
1356                memset(valstr, 0, sizeof(valstr));
1357                if (copy_from_user(valstr, &user_buffer[i], len))
1358                        return -EFAULT;
1359                i += len;
1360
1361                for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1362                        if (*v >= '0' && *v <= '9') {
1363                                *m *= 16;
1364                                *m += *v - '0';
1365                        }
1366                        if (*v >= 'A' && *v <= 'F') {
1367                                *m *= 16;
1368                                *m += *v - 'A' + 10;
1369                        }
1370                        if (*v >= 'a' && *v <= 'f') {
1371                                *m *= 16;
1372                                *m += *v - 'a' + 10;
1373                        }
1374                        if (*v == ':') {
1375                                m++;
1376                                *m = 0;
1377                        }
1378                }
1379
1380                /* Set up Dest MAC */
1381                if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1382                        memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1383
1384                sprintf(pg_result, "OK: dstmac");
1385                return count;
1386        }
1387        if (!strcmp(name, "src_mac")) {
1388                char *v = valstr;
1389                unsigned char old_smac[ETH_ALEN];
1390                unsigned char *m = pkt_dev->src_mac;
1391
1392                memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1393
1394                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1395                if (len < 0) {
1396                        return len;
1397                }
1398                memset(valstr, 0, sizeof(valstr));
1399                if (copy_from_user(valstr, &user_buffer[i], len))
1400                        return -EFAULT;
1401                i += len;
1402
1403                for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1404                        if (*v >= '0' && *v <= '9') {
1405                                *m *= 16;
1406                                *m += *v - '0';
1407                        }
1408                        if (*v >= 'A' && *v <= 'F') {
1409                                *m *= 16;
1410                                *m += *v - 'A' + 10;
1411                        }
1412                        if (*v >= 'a' && *v <= 'f') {
1413                                *m *= 16;
1414                                *m += *v - 'a' + 10;
1415                        }
1416                        if (*v == ':') {
1417                                m++;
1418                                *m = 0;
1419                        }
1420                }
1421
1422                /* Set up Src MAC */
1423                if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1424                        memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1425
1426                sprintf(pg_result, "OK: srcmac");
1427                return count;
1428        }
1429
1430        if (!strcmp(name, "clear_counters")) {
1431                pktgen_clear_counters(pkt_dev);
1432                sprintf(pg_result, "OK: Clearing counters.\n");
1433                return count;
1434        }
1435
1436        if (!strcmp(name, "flows")) {
1437                len = num_arg(&user_buffer[i], 10, &value);
1438                if (len < 0) {
1439                        return len;
1440                }
1441                i += len;
1442                if (value > MAX_CFLOWS)
1443                        value = MAX_CFLOWS;
1444
1445                pkt_dev->cflows = value;
1446                sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1447                return count;
1448        }
1449
1450        if (!strcmp(name, "flowlen")) {
1451                len = num_arg(&user_buffer[i], 10, &value);
1452                if (len < 0) {
1453                        return len;
1454                }
1455                i += len;
1456                pkt_dev->lflow = value;
1457                sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1458                return count;
1459        }
1460
1461        if (!strcmp(name, "queue_map_min")) {
1462                len = num_arg(&user_buffer[i], 5, &value);
1463                if (len < 0) {
1464                        return len;
1465                }
1466                i += len;
1467                pkt_dev->queue_map_min = value;
1468                sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1469                return count;
1470        }
1471
1472        if (!strcmp(name, "queue_map_max")) {
1473                len = num_arg(&user_buffer[i], 5, &value);
1474                if (len < 0) {
1475                        return len;
1476                }
1477                i += len;
1478                pkt_dev->queue_map_max = value;
1479                sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1480                return count;
1481        }
1482
1483        if (!strcmp(name, "mpls")) {
1484                unsigned n, cnt;
1485
1486                len = get_labels(&user_buffer[i], pkt_dev);
1487                if (len < 0)
1488                        return len;
1489                i += len;
1490                cnt = sprintf(pg_result, "OK: mpls=");
1491                for (n = 0; n < pkt_dev->nr_labels; n++)
1492                        cnt += sprintf(pg_result + cnt,
1493                                       "%08x%s", ntohl(pkt_dev->labels[n]),
1494                                       n == pkt_dev->nr_labels-1 ? "" : ",");
1495
1496                if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1497                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1498                        pkt_dev->svlan_id = 0xffff;
1499
1500                        if (debug)
1501                                printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1502                }
1503                return count;
1504        }
1505
1506        if (!strcmp(name, "vlan_id")) {
1507                len = num_arg(&user_buffer[i], 4, &value);
1508                if (len < 0) {
1509                        return len;
1510                }
1511                i += len;
1512                if (value <= 4095) {
1513                        pkt_dev->vlan_id = value;  /* turn on VLAN */
1514
1515                        if (debug)
1516                                printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1517
1518                        if (debug && pkt_dev->nr_labels)
1519                                printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1520
1521                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1522                        sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1523                } else {
1524                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1525                        pkt_dev->svlan_id = 0xffff;
1526
1527                        if (debug)
1528                                printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1529                }
1530                return count;
1531        }
1532
1533        if (!strcmp(name, "vlan_p")) {
1534                len = num_arg(&user_buffer[i], 1, &value);
1535                if (len < 0) {
1536                        return len;
1537                }
1538                i += len;
1539                if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1540                        pkt_dev->vlan_p = value;
1541                        sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1542                } else {
1543                        sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1544                }
1545                return count;
1546        }
1547
1548        if (!strcmp(name, "vlan_cfi")) {
1549                len = num_arg(&user_buffer[i], 1, &value);
1550                if (len < 0) {
1551                        return len;
1552                }
1553                i += len;
1554                if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1555                        pkt_dev->vlan_cfi = value;
1556                        sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1557                } else {
1558                        sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1559                }
1560                return count;
1561        }
1562
1563        if (!strcmp(name, "svlan_id")) {
1564                len = num_arg(&user_buffer[i], 4, &value);
1565                if (len < 0) {
1566                        return len;
1567                }
1568                i += len;
1569                if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1570                        pkt_dev->svlan_id = value;  /* turn on SVLAN */
1571
1572                        if (debug)
1573                                printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1574
1575                        if (debug && pkt_dev->nr_labels)
1576                                printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1577
1578                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1579                        sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1580                } else {
1581                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1582                        pkt_dev->svlan_id = 0xffff;
1583
1584                        if (debug)
1585                                printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1586                }
1587                return count;
1588        }
1589
1590        if (!strcmp(name, "svlan_p")) {
1591                len = num_arg(&user_buffer[i], 1, &value);
1592                if (len < 0) {
1593                        return len;
1594                }
1595                i += len;
1596                if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1597                        pkt_dev->svlan_p = value;
1598                        sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1599                } else {
1600                        sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1601                }
1602                return count;
1603        }
1604
1605        if (!strcmp(name, "svlan_cfi")) {
1606                len = num_arg(&user_buffer[i], 1, &value);
1607                if (len < 0) {
1608                        return len;
1609                }
1610                i += len;
1611                if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1612                        pkt_dev->svlan_cfi = value;
1613                        sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1614                } else {
1615                        sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1616                }
1617                return count;
1618        }
1619
1620        if (!strcmp(name, "tos")) {
1621                __u32 tmp_value = 0;
1622                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1623                if (len < 0) {
1624                        return len;
1625                }
1626                i += len;
1627                if (len == 2) {
1628                        pkt_dev->tos = tmp_value;
1629                        sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1630                } else {
1631                        sprintf(pg_result, "ERROR: tos must be 00-ff");
1632                }
1633                return count;
1634        }
1635
1636        if (!strcmp(name, "traffic_class")) {
1637                __u32 tmp_value = 0;
1638                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1639                if (len < 0) {
1640                        return len;
1641                }
1642                i += len;
1643                if (len == 2) {
1644                        pkt_dev->traffic_class = tmp_value;
1645                        sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1646                } else {
1647                        sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1648                }
1649                return count;
1650        }
1651
1652        sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1653        return -EINVAL;
1654}
1655
1656static int pktgen_if_open(struct inode *inode, struct file *file)
1657{
1658        return single_open(file, pktgen_if_show, PDE(inode)->data);
1659}
1660
1661static const struct file_operations pktgen_if_fops = {
1662        .owner   = THIS_MODULE,
1663        .open    = pktgen_if_open,
1664        .read    = seq_read,
1665        .llseek  = seq_lseek,
1666        .write   = pktgen_if_write,
1667        .release = single_release,
1668};
1669
1670static int pktgen_thread_show(struct seq_file *seq, void *v)
1671{
1672        struct pktgen_thread *t = seq->private;
1673        struct pktgen_dev *pkt_dev;
1674
1675        BUG_ON(!t);
1676
1677        seq_printf(seq, "Running: ");
1678
1679        if_lock(t);
1680        list_for_each_entry(pkt_dev, &t->if_list, list)
1681                if (pkt_dev->running)
1682                        seq_printf(seq, "%s ", pkt_dev->odev->name);
1683
1684        seq_printf(seq, "\nStopped: ");
1685
1686        list_for_each_entry(pkt_dev, &t->if_list, list)
1687                if (!pkt_dev->running)
1688                        seq_printf(seq, "%s ", pkt_dev->odev->name);
1689
1690        if (t->result[0])
1691                seq_printf(seq, "\nResult: %s\n", t->result);
1692        else
1693                seq_printf(seq, "\nResult: NA\n");
1694
1695        if_unlock(t);
1696
1697        return 0;
1698}
1699
1700static ssize_t pktgen_thread_write(struct file *file,
1701                                   const char __user * user_buffer,
1702                                   size_t count, loff_t * offset)
1703{
1704        struct seq_file *seq = (struct seq_file *)file->private_data;
1705        struct pktgen_thread *t = seq->private;
1706        int i = 0, max, len, ret;
1707        char name[40];
1708        char *pg_result;
1709
1710        if (count < 1) {
1711                //      sprintf(pg_result, "Wrong command format");
1712                return -EINVAL;
1713        }
1714
1715        max = count - i;
1716        len = count_trail_chars(&user_buffer[i], max);
1717        if (len < 0)
1718                return len;
1719
1720        i += len;
1721
1722        /* Read variable name */
1723
1724        len = strn_len(&user_buffer[i], sizeof(name) - 1);
1725        if (len < 0)
1726                return len;
1727
1728        memset(name, 0, sizeof(name));
1729        if (copy_from_user(name, &user_buffer[i], len))
1730                return -EFAULT;
1731        i += len;
1732
1733        max = count - i;
1734        len = count_trail_chars(&user_buffer[i], max);
1735        if (len < 0)
1736                return len;
1737
1738        i += len;
1739
1740        if (debug)
1741                printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1742                       name, (unsigned long)count);
1743
1744        if (!t) {
1745                printk(KERN_ERR "pktgen: ERROR: No thread\n");
1746                ret = -EINVAL;
1747                goto out;
1748        }
1749
1750        pg_result = &(t->result[0]);
1751
1752        if (!strcmp(name, "add_device")) {
1753                char f[32];
1754                memset(f, 0, 32);
1755                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1756                if (len < 0) {
1757                        ret = len;
1758                        goto out;
1759                }
1760                if (copy_from_user(f, &user_buffer[i], len))
1761                        return -EFAULT;
1762                i += len;
1763                mutex_lock(&pktgen_thread_lock);
1764                pktgen_add_device(t, f);
1765                mutex_unlock(&pktgen_thread_lock);
1766                ret = count;
1767                sprintf(pg_result, "OK: add_device=%s", f);
1768                goto out;
1769        }
1770
1771        if (!strcmp(name, "rem_device_all")) {
1772                mutex_lock(&pktgen_thread_lock);
1773                t->control |= T_REMDEVALL;
1774                mutex_unlock(&pktgen_thread_lock);
1775                schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1776                ret = count;
1777                sprintf(pg_result, "OK: rem_device_all");
1778                goto out;
1779        }
1780
1781        if (!strcmp(name, "max_before_softirq")) {
1782                sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1783                ret = count;
1784                goto out;
1785        }
1786
1787        ret = -EINVAL;
1788out:
1789        return ret;
1790}
1791
1792static int pktgen_thread_open(struct inode *inode, struct file *file)
1793{
1794        return single_open(file, pktgen_thread_show, PDE(inode)->data);
1795}
1796
1797static const struct file_operations pktgen_thread_fops = {
1798        .owner   = THIS_MODULE,
1799        .open    = pktgen_thread_open,
1800        .read    = seq_read,
1801        .llseek  = seq_lseek,
1802        .write   = pktgen_thread_write,
1803        .release = single_release,
1804};
1805
1806/* Think find or remove for NN */
1807static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1808{
1809        struct pktgen_thread *t;
1810        struct pktgen_dev *pkt_dev = NULL;
1811
1812        list_for_each_entry(t, &pktgen_threads, th_list) {
1813                pkt_dev = pktgen_find_dev(t, ifname);
1814                if (pkt_dev) {
1815                        if (remove) {
1816                                if_lock(t);
1817                                pkt_dev->removal_mark = 1;
1818                                t->control |= T_REMDEV;
1819                                if_unlock(t);
1820                        }
1821                        break;
1822                }
1823        }
1824        return pkt_dev;
1825}
1826
1827/*
1828 * mark a device for removal
1829 */
1830static void pktgen_mark_device(const char *ifname)
1831{
1832        struct pktgen_dev *pkt_dev = NULL;
1833        const int max_tries = 10, msec_per_try = 125;
1834        int i = 0;
1835
1836        mutex_lock(&pktgen_thread_lock);
1837        pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1838
1839        while (1) {
1840
1841                pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1842                if (pkt_dev == NULL)
1843                        break;  /* success */
1844
1845                mutex_unlock(&pktgen_thread_lock);
1846                pr_debug("pktgen: pktgen_mark_device waiting for %s "
1847                                "to disappear....\n", ifname);
1848                schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1849                mutex_lock(&pktgen_thread_lock);
1850
1851                if (++i >= max_tries) {
1852                        printk(KERN_ERR "pktgen_mark_device: timed out after "
1853                               "waiting %d msec for device %s to be removed\n",
1854                               msec_per_try * i, ifname);
1855                        break;
1856                }
1857
1858        }
1859
1860        mutex_unlock(&pktgen_thread_lock);
1861}
1862
1863static void pktgen_change_name(struct net_device *dev)
1864{
1865        struct pktgen_thread *t;
1866
1867        list_for_each_entry(t, &pktgen_threads, th_list) {
1868                struct pktgen_dev *pkt_dev;
1869
1870                list_for_each_entry(pkt_dev, &t->if_list, list) {
1871                        if (pkt_dev->odev != dev)
1872                                continue;
1873
1874                        remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1875
1876                        pkt_dev->entry = create_proc_entry(dev->name, 0600,
1877                                                           pg_proc_dir);
1878                        if (!pkt_dev->entry)
1879                                printk(KERN_ERR "pktgen: can't move proc "
1880                                       " entry for '%s'\n", dev->name);
1881                        break;
1882                }
1883        }
1884}
1885
1886static int pktgen_device_event(struct notifier_block *unused,
1887                               unsigned long event, void *ptr)
1888{
1889        struct net_device *dev = ptr;
1890
1891        if (!net_eq(dev_net(dev), &init_net))
1892                return NOTIFY_DONE;
1893
1894        /* It is OK that we do not hold the group lock right now,
1895         * as we run under the RTNL lock.
1896         */
1897
1898        switch (event) {
1899        case NETDEV_CHANGENAME:
1900                pktgen_change_name(dev);
1901                break;
1902
1903        case NETDEV_UNREGISTER:
1904                pktgen_mark_device(dev->name);
1905                break;
1906        }
1907
1908        return NOTIFY_DONE;
1909}
1910
1911static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, const char *ifname)
1912{
1913        char b[IFNAMSIZ+5];
1914        int i = 0;
1915
1916        for(i=0; ifname[i] != '@'; i++) {
1917                if(i == IFNAMSIZ)
1918                        break;
1919
1920                b[i] = ifname[i];
1921        }
1922        b[i] = 0;
1923
1924        return dev_get_by_name(&init_net, b);
1925}
1926
1927
1928/* Associate pktgen_dev with a device. */
1929
1930static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1931{
1932        struct net_device *odev;
1933        int err;
1934
1935        /* Clean old setups */
1936        if (pkt_dev->odev) {
1937                dev_put(pkt_dev->odev);
1938                pkt_dev->odev = NULL;
1939        }
1940
1941        odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1942        if (!odev) {
1943                printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1944                return -ENODEV;
1945        }
1946
1947        if (odev->type != ARPHRD_ETHER) {
1948                printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1949                err = -EINVAL;
1950        } else if (!netif_running(odev)) {
1951                printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1952                err = -ENETDOWN;
1953        } else {
1954                pkt_dev->odev = odev;
1955                return 0;
1956        }
1957
1958        dev_put(odev);
1959        return err;
1960}
1961
1962/* Read pkt_dev from the interface and set up internal pktgen_dev
1963 * structure to have the right information to create/send packets
1964 */
1965static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1966{
1967        int ntxq;
1968
1969        if (!pkt_dev->odev) {
1970                printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1971                       "setup_inject.\n");
1972                sprintf(pkt_dev->result,
1973                        "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1974                return;
1975        }
1976
1977        /* make sure that we don't pick a non-existing transmit queue */
1978        ntxq = pkt_dev->odev->real_num_tx_queues;
1979
1980        if (ntxq <= pkt_dev->queue_map_min) {
1981                printk(KERN_WARNING "pktgen: WARNING: Requested "
1982                       "queue_map_min (zero-based) (%d) exceeds valid range "
1983                       "[0 - %d] for (%d) queues on %s, resetting\n",
1984                       pkt_dev->queue_map_min, (ntxq ?: 1)- 1, ntxq,
1985                       pkt_dev->odev->name);
1986                pkt_dev->queue_map_min = ntxq - 1;
1987        }
1988        if (pkt_dev->queue_map_max >= ntxq) {
1989                printk(KERN_WARNING "pktgen: WARNING: Requested "
1990                       "queue_map_max (zero-based) (%d) exceeds valid range "
1991                       "[0 - %d] for (%d) queues on %s, resetting\n",
1992                       pkt_dev->queue_map_max, (ntxq ?: 1)- 1, ntxq,
1993                       pkt_dev->odev->name);
1994                pkt_dev->queue_map_max = ntxq - 1;
1995        }
1996
1997        /* Default to the interface's mac if not explicitly set. */
1998
1999        if (is_zero_ether_addr(pkt_dev->src_mac))
2000                memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2001
2002        /* Set up Dest MAC */
2003        memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2004
2005        /* Set up pkt size */
2006        pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2007
2008        if (pkt_dev->flags & F_IPV6) {
2009                /*
2010                 * Skip this automatic address setting until locks or functions
2011                 * gets exported
2012                 */
2013
2014#ifdef NOTNOW
2015                int i, set = 0, err = 1;
2016                struct inet6_dev *idev;
2017
2018                for (i = 0; i < IN6_ADDR_HSIZE; i++)
2019                        if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2020                                set = 1;
2021                                break;
2022                        }
2023
2024                if (!set) {
2025
2026                        /*
2027                         * Use linklevel address if unconfigured.
2028                         *
2029                         * use ipv6_get_lladdr if/when it's get exported
2030                         */
2031
2032                        rcu_read_lock();
2033                        if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2034                                struct inet6_ifaddr *ifp;
2035
2036                                read_lock_bh(&idev->lock);
2037                                for (ifp = idev->addr_list; ifp;
2038                                     ifp = ifp->if_next) {
2039                                        if (ifp->scope == IFA_LINK
2040                                            && !(ifp->
2041                                                 flags & IFA_F_TENTATIVE)) {
2042                                                ipv6_addr_copy(&pkt_dev->
2043                                                               cur_in6_saddr,
2044                                                               &ifp->addr);
2045                                                err = 0;
2046                                                break;
2047                                        }
2048                                }
2049                                read_unlock_bh(&idev->lock);
2050                        }
2051                        rcu_read_unlock();
2052                        if (err)
2053                                printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2054                                       "address not availble.\n");
2055                }
2056#endif
2057        } else {
2058                pkt_dev->saddr_min = 0;
2059                pkt_dev->saddr_max = 0;
2060                if (strlen(pkt_dev->src_min) == 0) {
2061
2062                        struct in_device *in_dev;
2063
2064                        rcu_read_lock();
2065                        in_dev = __in_dev_get_rcu(pkt_dev->odev);
2066                        if (in_dev) {
2067                                if (in_dev->ifa_list) {
2068                                        pkt_dev->saddr_min =
2069                                            in_dev->ifa_list->ifa_address;
2070                                        pkt_dev->saddr_max = pkt_dev->saddr_min;
2071                                }
2072                        }
2073                        rcu_read_unlock();
2074                } else {
2075                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2076                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2077                }
2078
2079                pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2080                pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2081        }
2082        /* Initialize current values. */
2083        pkt_dev->cur_dst_mac_offset = 0;
2084        pkt_dev->cur_src_mac_offset = 0;
2085        pkt_dev->cur_saddr = pkt_dev->saddr_min;
2086        pkt_dev->cur_daddr = pkt_dev->daddr_min;
2087        pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2088        pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2089        pkt_dev->nflows = 0;
2090}
2091
2092static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2093{
2094        __u64 start;
2095        __u64 now;
2096
2097        start = now = getCurUs();
2098        while (now < spin_until_us) {
2099                /* TODO: optimize sleeping behavior */
2100                if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2101                        schedule_timeout_interruptible(1);
2102                else if (spin_until_us - now > 100) {
2103                        if (!pkt_dev->running)
2104                                return;
2105                        if (need_resched())
2106                                schedule();
2107                }
2108
2109                now = getCurUs();
2110        }
2111
2112        pkt_dev->idle_acc += now - start;
2113}
2114
2115static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2116{
2117        pkt_dev->pkt_overhead = 0;
2118        pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2119        pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2120        pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2121}
2122
2123static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
2124{
2125
2126        if (pkt_dev->flows[flow].flags & F_INIT)
2127                return 1;
2128        else
2129                return 0;
2130}
2131
2132static inline int f_pick(struct pktgen_dev *pkt_dev)
2133{
2134        int flow = pkt_dev->curfl;
2135
2136        if (pkt_dev->flags & F_FLOW_SEQ) {
2137                if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2138                        /* reset time */
2139                        pkt_dev->flows[flow].count = 0;
2140                        pkt_dev->flows[flow].flags = 0;
2141                        pkt_dev->curfl += 1;
2142                        if (pkt_dev->curfl >= pkt_dev->cflows)
2143                                pkt_dev->curfl = 0; /*reset */
2144                }
2145        } else {
2146                flow = random32() % pkt_dev->cflows;
2147                pkt_dev->curfl = flow;
2148
2149                if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2150                        pkt_dev->flows[flow].count = 0;
2151                        pkt_dev->flows[flow].flags = 0;
2152                }
2153        }
2154
2155        return pkt_dev->curfl;
2156}
2157
2158
2159#ifdef CONFIG_XFRM
2160/* If there was already an IPSEC SA, we keep it as is, else
2161 * we go look for it ...
2162*/
2163static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2164{
2165        struct xfrm_state *x = pkt_dev->flows[flow].x;
2166        if (!x) {
2167                /*slow path: we dont already have xfrm_state*/
2168                x = xfrm_stateonly_find(&init_net,
2169                                        (xfrm_address_t *)&pkt_dev->cur_daddr,
2170                                        (xfrm_address_t *)&pkt_dev->cur_saddr,
2171                                        AF_INET,
2172                                        pkt_dev->ipsmode,
2173                                        pkt_dev->ipsproto, 0);
2174                if (x) {
2175                        pkt_dev->flows[flow].x = x;
2176                        set_pkt_overhead(pkt_dev);
2177                        pkt_dev->pkt_overhead+=x->props.header_len;
2178                }
2179
2180        }
2181}
2182#endif
2183static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2184{
2185
2186        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2187                pkt_dev->cur_queue_map = smp_processor_id();
2188
2189        else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2190                __u16 t;
2191                if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2192                        t = random32() %
2193                                (pkt_dev->queue_map_max -
2194                                 pkt_dev->queue_map_min + 1)
2195                                + pkt_dev->queue_map_min;
2196                } else {
2197                        t = pkt_dev->cur_queue_map + 1;
2198                        if (t > pkt_dev->queue_map_max)
2199                                t = pkt_dev->queue_map_min;
2200                }
2201                pkt_dev->cur_queue_map = t;
2202        }
2203        pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2204}
2205
2206/* Increment/randomize headers according to flags and current values
2207 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2208 */
2209static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2210{
2211        __u32 imn;
2212        __u32 imx;
2213        int flow = 0;
2214
2215        if (pkt_dev->cflows)
2216                flow = f_pick(pkt_dev);
2217
2218        /*  Deal with source MAC */
2219        if (pkt_dev->src_mac_count > 1) {
2220                __u32 mc;
2221                __u32 tmp;
2222
2223                if (pkt_dev->flags & F_MACSRC_RND)
2224                        mc = random32() % pkt_dev->src_mac_count;
2225                else {
2226                        mc = pkt_dev->cur_src_mac_offset++;
2227                        if (pkt_dev->cur_src_mac_offset >=
2228                            pkt_dev->src_mac_count)
2229                                pkt_dev->cur_src_mac_offset = 0;
2230                }
2231
2232                tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2233                pkt_dev->hh[11] = tmp;
2234                tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2235                pkt_dev->hh[10] = tmp;
2236                tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2237                pkt_dev->hh[9] = tmp;
2238                tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2239                pkt_dev->hh[8] = tmp;
2240                tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2241                pkt_dev->hh[7] = tmp;
2242        }
2243
2244        /*  Deal with Destination MAC */
2245        if (pkt_dev->dst_mac_count > 1) {
2246                __u32 mc;
2247                __u32 tmp;
2248
2249                if (pkt_dev->flags & F_MACDST_RND)
2250                        mc = random32() % pkt_dev->dst_mac_count;
2251
2252                else {
2253                        mc = pkt_dev->cur_dst_mac_offset++;
2254                        if (pkt_dev->cur_dst_mac_offset >=
2255                            pkt_dev->dst_mac_count) {
2256                                pkt_dev->cur_dst_mac_offset = 0;
2257                        }
2258                }
2259
2260                tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2261                pkt_dev->hh[5] = tmp;
2262                tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2263                pkt_dev->hh[4] = tmp;
2264                tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2265                pkt_dev->hh[3] = tmp;
2266                tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2267                pkt_dev->hh[2] = tmp;
2268                tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2269                pkt_dev->hh[1] = tmp;
2270        }
2271
2272        if (pkt_dev->flags & F_MPLS_RND) {
2273                unsigned i;
2274                for (i = 0; i < pkt_dev->nr_labels; i++)
2275                        if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2276                                pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2277                                             ((__force __be32)random32() &
2278                                                      htonl(0x000fffff));
2279        }
2280
2281        if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2282                pkt_dev->vlan_id = random32() & (4096-1);
2283        }
2284
2285        if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2286                pkt_dev->svlan_id = random32() & (4096 - 1);
2287        }
2288
2289        if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2290                if (pkt_dev->flags & F_UDPSRC_RND)
2291                        pkt_dev->cur_udp_src = random32() %
2292                                (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2293                                + pkt_dev->udp_src_min;
2294
2295                else {
2296                        pkt_dev->cur_udp_src++;
2297                        if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2298                                pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2299                }
2300        }
2301
2302        if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2303                if (pkt_dev->flags & F_UDPDST_RND) {
2304                        pkt_dev->cur_udp_dst = random32() %
2305                                (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2306                                + pkt_dev->udp_dst_min;
2307                } else {
2308                        pkt_dev->cur_udp_dst++;
2309                        if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2310                                pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2311                }
2312        }
2313
2314        if (!(pkt_dev->flags & F_IPV6)) {
2315
2316                if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2317                                                         ntohl(pkt_dev->
2318                                                               saddr_max))) {
2319                        __u32 t;
2320                        if (pkt_dev->flags & F_IPSRC_RND)
2321                                t = random32() % (imx - imn) + imn;
2322                        else {
2323                                t = ntohl(pkt_dev->cur_saddr);
2324                                t++;
2325                                if (t > imx) {
2326                                        t = imn;
2327                                }
2328                        }
2329                        pkt_dev->cur_saddr = htonl(t);
2330                }
2331
2332                if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2333                        pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2334                } else {
2335                        imn = ntohl(pkt_dev->daddr_min);
2336                        imx = ntohl(pkt_dev->daddr_max);
2337                        if (imn < imx) {
2338                                __u32 t;
2339                                __be32 s;
2340                                if (pkt_dev->flags & F_IPDST_RND) {
2341
2342                                        t = random32() % (imx - imn) + imn;
2343                                        s = htonl(t);
2344
2345                                        while (ipv4_is_loopback(s) ||
2346                                               ipv4_is_multicast(s) ||
2347                                               ipv4_is_lbcast(s) ||
2348                                               ipv4_is_zeronet(s) ||
2349                                               ipv4_is_local_multicast(s)) {
2350                                                t = random32() % (imx - imn) + imn;
2351                                                s = htonl(t);
2352                                        }
2353                                        pkt_dev->cur_daddr = s;
2354                                } else {
2355                                        t = ntohl(pkt_dev->cur_daddr);
2356                                        t++;
2357                                        if (t > imx) {
2358                                                t = imn;
2359                                        }
2360                                        pkt_dev->cur_daddr = htonl(t);
2361                                }
2362                        }
2363                        if (pkt_dev->cflows) {
2364                                pkt_dev->flows[flow].flags |= F_INIT;
2365                                pkt_dev->flows[flow].cur_daddr =
2366                                    pkt_dev->cur_daddr;
2367#ifdef CONFIG_XFRM
2368                                if (pkt_dev->flags & F_IPSEC_ON)
2369                                        get_ipsec_sa(pkt_dev, flow);
2370#endif
2371                                pkt_dev->nflows++;
2372                        }
2373                }
2374        } else {                /* IPV6 * */
2375
2376                if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2377                    pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2378                    pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2379                    pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2380                else {
2381                        int i;
2382
2383                        /* Only random destinations yet */
2384
2385                        for (i = 0; i < 4; i++) {
2386                                pkt_dev->cur_in6_daddr.s6_addr32[i] =
2387                                    (((__force __be32)random32() |
2388                                      pkt_dev->min_in6_daddr.s6_addr32[i]) &
2389                                     pkt_dev->max_in6_daddr.s6_addr32[i]);
2390                        }
2391                }
2392        }
2393
2394        if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2395                __u32 t;
2396                if (pkt_dev->flags & F_TXSIZE_RND) {
2397                        t = random32() %
2398                                (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2399                                + pkt_dev->min_pkt_size;
2400                } else {
2401                        t = pkt_dev->cur_pkt_size + 1;
2402                        if (t > pkt_dev->max_pkt_size)
2403                                t = pkt_dev->min_pkt_size;
2404                }
2405                pkt_dev->cur_pkt_size = t;
2406        }
2407
2408        set_cur_queue_map(pkt_dev);
2409
2410        pkt_dev->flows[flow].count++;
2411}
2412
2413
2414#ifdef CONFIG_XFRM
2415static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2416{
2417        struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2418        int err = 0;
2419        struct iphdr *iph;
2420
2421        if (!x)
2422                return 0;
2423        /* XXX: we dont support tunnel mode for now until
2424         * we resolve the dst issue */
2425        if (x->props.mode != XFRM_MODE_TRANSPORT)
2426                return 0;
2427
2428        spin_lock(&x->lock);
2429        iph = ip_hdr(skb);
2430
2431        err = x->outer_mode->output(x, skb);
2432        if (err)
2433                goto error;
2434        err = x->type->output(x, skb);
2435        if (err)
2436                goto error;
2437
2438        x->curlft.bytes +=skb->len;
2439        x->curlft.packets++;
2440error:
2441        spin_unlock(&x->lock);
2442        return err;
2443}
2444
2445static inline void free_SAs(struct pktgen_dev *pkt_dev)
2446{
2447        if (pkt_dev->cflows) {
2448                /* let go of the SAs if we have them */
2449                int i = 0;
2450                for (;  i < pkt_dev->cflows; i++) {
2451                        struct xfrm_state *x = pkt_dev->flows[i].x;
2452                        if (x) {
2453                                xfrm_state_put(x);
2454                                pkt_dev->flows[i].x = NULL;
2455                        }
2456                }
2457        }
2458}
2459
2460static inline int process_ipsec(struct pktgen_dev *pkt_dev,
2461                              struct sk_buff *skb, __be16 protocol)
2462{
2463        if (pkt_dev->flags & F_IPSEC_ON) {
2464                struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2465                int nhead = 0;
2466                if (x) {
2467                        int ret;
2468                        __u8 *eth;
2469                        nhead = x->props.header_len - skb_headroom(skb);
2470                        if (nhead >0) {
2471                                ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2472                                if (ret < 0) {
2473                                        printk(KERN_ERR "Error expanding "
2474                                               "ipsec packet %d\n",ret);
2475                                        goto err;
2476                                }
2477                        }
2478
2479                        /* ipsec is not expecting ll header */
2480                        skb_pull(skb, ETH_HLEN);
2481                        ret = pktgen_output_ipsec(skb, pkt_dev);
2482                        if (ret) {
2483                                printk(KERN_ERR "Error creating ipsec "
2484                                       "packet %d\n",ret);
2485                                goto err;
2486                        }
2487                        /* restore ll */
2488                        eth = (__u8 *) skb_push(skb, ETH_HLEN);
2489                        memcpy(eth, pkt_dev->hh, 12);
2490                        *(u16 *) & eth[12] = protocol;
2491                }
2492        }
2493        return 1;
2494err:
2495        kfree_skb(skb);
2496        return 0;
2497}
2498#endif
2499
2500static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2501{
2502        unsigned i;
2503        for (i = 0; i < pkt_dev->nr_labels; i++) {
2504                *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2505        }
2506        mpls--;
2507        *mpls |= MPLS_STACK_BOTTOM;
2508}
2509
2510static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2511                               unsigned int prio)
2512{
2513        return htons(id | (cfi << 12) | (prio << 13));
2514}
2515
2516static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2517                                        struct pktgen_dev *pkt_dev)
2518{
2519        struct sk_buff *skb = NULL;
2520        __u8 *eth;
2521        struct udphdr *udph;
2522        int datalen, iplen;
2523        struct iphdr *iph;
2524        struct pktgen_hdr *pgh = NULL;
2525        __be16 protocol = htons(ETH_P_IP);
2526        __be32 *mpls;
2527        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2528        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2529        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2530        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2531        u16 queue_map;
2532
2533        if (pkt_dev->nr_labels)
2534                protocol = htons(ETH_P_MPLS_UC);
2535
2536        if (pkt_dev->vlan_id != 0xffff)
2537                protocol = htons(ETH_P_8021Q);
2538
2539        /* Update any of the values, used when we're incrementing various
2540         * fields.
2541         */
2542        queue_map = pkt_dev->cur_queue_map;
2543        mod_cur_headers(pkt_dev);
2544
2545        datalen = (odev->hard_header_len + 16) & ~0xf;
2546        skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2547                        pkt_dev->pkt_overhead, GFP_ATOMIC);
2548        if (!skb) {
2549                sprintf(pkt_dev->result, "No memory");
2550                return NULL;
2551        }
2552
2553        skb_reserve(skb, datalen);
2554
2555        /*  Reserve for ethernet and IP header  */
2556        eth = (__u8 *) skb_push(skb, 14);
2557        mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2558        if (pkt_dev->nr_labels)
2559                mpls_push(mpls, pkt_dev);
2560
2561        if (pkt_dev->vlan_id != 0xffff) {
2562                if (pkt_dev->svlan_id != 0xffff) {
2563                        svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2564                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2565                                               pkt_dev->svlan_cfi,
2566                                               pkt_dev->svlan_p);
2567                        svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2568                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2569                }
2570                vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2571                *vlan_tci = build_tci(pkt_dev->vlan_id,
2572                                      pkt_dev->vlan_cfi,
2573                                      pkt_dev->vlan_p);
2574                vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2575                *vlan_encapsulated_proto = htons(ETH_P_IP);
2576        }
2577
2578        skb->network_header = skb->tail;
2579        skb->transport_header = skb->network_header + sizeof(struct iphdr);
2580        skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2581        skb_set_queue_mapping(skb, queue_map);
2582        iph = ip_hdr(skb);
2583        udph = udp_hdr(skb);
2584
2585        memcpy(eth, pkt_dev->hh, 12);
2586        *(__be16 *) & eth[12] = protocol;
2587
2588        /* Eth + IPh + UDPh + mpls */
2589        datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2590                  pkt_dev->pkt_overhead;
2591        if (datalen < sizeof(struct pktgen_hdr))
2592                datalen = sizeof(struct pktgen_hdr);
2593
2594        udph->source = htons(pkt_dev->cur_udp_src);
2595        udph->dest = htons(pkt_dev->cur_udp_dst);
2596        udph->len = htons(datalen + 8); /* DATA + udphdr */
2597        udph->check = 0;        /* No checksum */
2598
2599        iph->ihl = 5;
2600        iph->version = 4;
2601        iph->ttl = 32;
2602        iph->tos = pkt_dev->tos;
2603        iph->protocol = IPPROTO_UDP;    /* UDP */
2604        iph->saddr = pkt_dev->cur_saddr;
2605        iph->daddr = pkt_dev->cur_daddr;
2606        iph->frag_off = 0;
2607        iplen = 20 + 8 + datalen;
2608        iph->tot_len = htons(iplen);
2609        iph->check = 0;
2610        iph->check = ip_fast_csum((void *)iph, iph->ihl);
2611        skb->protocol = protocol;
2612        skb->mac_header = (skb->network_header - ETH_HLEN -
2613                           pkt_dev->pkt_overhead);
2614        skb->dev = odev;
2615        skb->pkt_type = PACKET_HOST;
2616
2617        if (pkt_dev->nfrags <= 0)
2618                pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2619        else {
2620                int frags = pkt_dev->nfrags;
2621                int i;
2622
2623                pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2624
2625                if (frags > MAX_SKB_FRAGS)
2626                        frags = MAX_SKB_FRAGS;
2627                if (datalen > frags * PAGE_SIZE) {
2628                        skb_put(skb, datalen - frags * PAGE_SIZE);
2629                        datalen = frags * PAGE_SIZE;
2630                }
2631
2632                i = 0;
2633                while (datalen > 0) {
2634                        struct page *page = alloc_pages(GFP_KERNEL, 0);
2635                        skb_shinfo(skb)->frags[i].page = page;
2636                        skb_shinfo(skb)->frags[i].page_offset = 0;
2637                        skb_shinfo(skb)->frags[i].size =
2638                            (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2639                        datalen -= skb_shinfo(skb)->frags[i].size;
2640                        skb->len += skb_shinfo(skb)->frags[i].size;
2641                        skb->data_len += skb_shinfo(skb)->frags[i].size;
2642                        i++;
2643                        skb_shinfo(skb)->nr_frags = i;
2644                }
2645
2646                while (i < frags) {
2647                        int rem;
2648
2649                        if (i == 0)
2650                                break;
2651
2652                        rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2653                        if (rem == 0)
2654                                break;
2655
2656                        skb_shinfo(skb)->frags[i - 1].size -= rem;
2657
2658                        skb_shinfo(skb)->frags[i] =
2659                            skb_shinfo(skb)->frags[i - 1];
2660                        get_page(skb_shinfo(skb)->frags[i].page);
2661                        skb_shinfo(skb)->frags[i].page =
2662                            skb_shinfo(skb)->frags[i - 1].page;
2663                        skb_shinfo(skb)->frags[i].page_offset +=
2664                            skb_shinfo(skb)->frags[i - 1].size;
2665                        skb_shinfo(skb)->frags[i].size = rem;
2666                        i++;
2667                        skb_shinfo(skb)->nr_frags = i;
2668                }
2669        }
2670
2671        /* Stamp the time, and sequence number, convert them to network byte order */
2672
2673        if (pgh) {
2674                struct timeval timestamp;
2675
2676                pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2677                pgh->seq_num = htonl(pkt_dev->seq_num);
2678
2679                do_gettimeofday(&timestamp);
2680                pgh->tv_sec = htonl(timestamp.tv_sec);
2681                pgh->tv_usec = htonl(timestamp.tv_usec);
2682        }
2683
2684#ifdef CONFIG_XFRM
2685        if (!process_ipsec(pkt_dev, skb, protocol))
2686                return NULL;
2687#endif
2688
2689        return skb;
2690}
2691
2692/*
2693 * scan_ip6, fmt_ip taken from dietlibc-0.21
2694 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2695 *
2696 * Slightly modified for kernel.
2697 * Should be candidate for net/ipv4/utils.c
2698 * --ro
2699 */
2700
2701static unsigned int scan_ip6(const char *s, char ip[16])
2702{
2703        unsigned int i;
2704        unsigned int len = 0;
2705        unsigned long u;
2706        char suffix[16];
2707        unsigned int prefixlen = 0;
2708        unsigned int suffixlen = 0;
2709        __be32 tmp;
2710        char *pos;
2711
2712        for (i = 0; i < 16; i++)
2713                ip[i] = 0;
2714
2715        for (;;) {
2716                if (*s == ':') {
2717                        len++;
2718                        if (s[1] == ':') {      /* Found "::", skip to part 2 */
2719                                s += 2;
2720                                len++;
2721                                break;
2722                        }
2723                        s++;
2724                }
2725
2726                u = simple_strtoul(s, &pos, 16);
2727                i = pos - s;
2728                if (!i)
2729                        return 0;
2730                if (prefixlen == 12 && s[i] == '.') {
2731
2732                        /* the last 4 bytes may be written as IPv4 address */
2733
2734                        tmp = in_aton(s);
2735                        memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2736                        return i + len;
2737                }
2738                ip[prefixlen++] = (u >> 8);
2739                ip[prefixlen++] = (u & 255);
2740                s += i;
2741                len += i;
2742                if (prefixlen == 16)
2743                        return len;
2744        }
2745
2746/* part 2, after "::" */
2747        for (;;) {
2748                if (*s == ':') {
2749                        if (suffixlen == 0)
2750                                break;
2751                        s++;
2752                        len++;
2753                } else if (suffixlen != 0)
2754                        break;
2755
2756                u = simple_strtol(s, &pos, 16);
2757                i = pos - s;
2758                if (!i) {
2759                        if (*s)
2760                                len--;
2761                        break;
2762                }
2763                if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2764                        tmp = in_aton(s);
2765                        memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2766                               sizeof(tmp));
2767                        suffixlen += 4;
2768                        len += strlen(s);
2769                        break;
2770                }
2771                suffix[suffixlen++] = (u >> 8);
2772                suffix[suffixlen++] = (u & 255);
2773                s += i;
2774                len += i;
2775                if (prefixlen + suffixlen == 16)
2776                        break;
2777        }
2778        for (i = 0; i < suffixlen; i++)
2779                ip[16 - suffixlen + i] = suffix[i];
2780        return len;
2781}
2782
2783static char tohex(char hexdigit)
2784{
2785        return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2786}
2787
2788static int fmt_xlong(char *s, unsigned int i)
2789{
2790        char *bak = s;
2791        *s = tohex((i >> 12) & 0xf);
2792        if (s != bak || *s != '0')
2793                ++s;
2794        *s = tohex((i >> 8) & 0xf);
2795        if (s != bak || *s != '0')
2796                ++s;
2797        *s = tohex((i >> 4) & 0xf);
2798        if (s != bak || *s != '0')
2799                ++s;
2800        *s = tohex(i & 0xf);
2801        return s - bak + 1;
2802}
2803
2804static unsigned int fmt_ip6(char *s, const char ip[16])
2805{
2806        unsigned int len;
2807        unsigned int i;
2808        unsigned int temp;
2809        unsigned int compressing;
2810        int j;
2811
2812        len = 0;
2813        compressing = 0;
2814        for (j = 0; j < 16; j += 2) {
2815
2816#ifdef V4MAPPEDPREFIX
2817                if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2818                        inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2819                        temp = strlen(s);
2820                        return len + temp;
2821                }
2822#endif
2823                temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2824                    (unsigned long)(unsigned char)ip[j + 1];
2825                if (temp == 0) {
2826                        if (!compressing) {
2827                                compressing = 1;
2828                                if (j == 0) {
2829                                        *s++ = ':';
2830                                        ++len;
2831                                }
2832                        }
2833                } else {
2834                        if (compressing) {
2835                                compressing = 0;
2836                                *s++ = ':';
2837                                ++len;
2838                        }
2839                        i = fmt_xlong(s, temp);
2840                        len += i;
2841                        s += i;
2842                        if (j < 14) {
2843                                *s++ = ':';
2844                                ++len;
2845                        }
2846                }
2847        }
2848        if (compressing) {
2849                *s++ = ':';
2850                ++len;
2851        }
2852        *s = 0;
2853        return len;
2854}
2855
2856static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2857                                        struct pktgen_dev *pkt_dev)
2858{
2859        struct sk_buff *skb = NULL;
2860        __u8 *eth;
2861        struct udphdr *udph;
2862        int datalen;
2863        struct ipv6hdr *iph;
2864        struct pktgen_hdr *pgh = NULL;
2865        __be16 protocol = htons(ETH_P_IPV6);
2866        __be32 *mpls;
2867        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2868        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2869        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2870        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2871        u16 queue_map;
2872
2873        if (pkt_dev->nr_labels)
2874                protocol = htons(ETH_P_MPLS_UC);
2875
2876        if (pkt_dev->vlan_id != 0xffff)
2877                protocol = htons(ETH_P_8021Q);
2878
2879        /* Update any of the values, used when we're incrementing various
2880         * fields.
2881         */
2882        queue_map = pkt_dev->cur_queue_map;
2883        mod_cur_headers(pkt_dev);
2884
2885        skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2886                        pkt_dev->pkt_overhead, GFP_ATOMIC);
2887        if (!skb) {
2888                sprintf(pkt_dev->result, "No memory");
2889                return NULL;
2890        }
2891
2892        skb_reserve(skb, 16);
2893
2894        /*  Reserve for ethernet and IP header  */
2895        eth = (__u8 *) skb_push(skb, 14);
2896        mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2897        if (pkt_dev->nr_labels)
2898                mpls_push(mpls, pkt_dev);
2899
2900        if (pkt_dev->vlan_id != 0xffff) {
2901                if (pkt_dev->svlan_id != 0xffff) {
2902                        svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2903                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2904                                               pkt_dev->svlan_cfi,
2905                                               pkt_dev->svlan_p);
2906                        svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2907                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2908                }
2909                vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2910                *vlan_tci = build_tci(pkt_dev->vlan_id,
2911                                      pkt_dev->vlan_cfi,
2912                                      pkt_dev->vlan_p);
2913                vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2914                *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2915        }
2916
2917        skb->network_header = skb->tail;
2918        skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2919        skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2920        skb_set_queue_mapping(skb, queue_map);
2921        iph = ipv6_hdr(skb);
2922        udph = udp_hdr(skb);
2923
2924        memcpy(eth, pkt_dev->hh, 12);
2925        *(__be16 *) & eth[12] = protocol;
2926
2927        /* Eth + IPh + UDPh + mpls */
2928        datalen = pkt_dev->cur_pkt_size - 14 -
2929                  sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2930                  pkt_dev->pkt_overhead;
2931
2932        if (datalen < sizeof(struct pktgen_hdr)) {
2933                datalen = sizeof(struct pktgen_hdr);
2934                if (net_ratelimit())
2935                        printk(KERN_INFO "pktgen: increased datalen to %d\n",
2936                               datalen);
2937        }
2938
2939        udph->source = htons(pkt_dev->cur_udp_src);
2940        udph->dest = htons(pkt_dev->cur_udp_dst);
2941        udph->len = htons(datalen + sizeof(struct udphdr));
2942        udph->check = 0;        /* No checksum */
2943
2944        *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
2945
2946        if (pkt_dev->traffic_class) {
2947                /* Version + traffic class + flow (0) */
2948                *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2949        }
2950
2951        iph->hop_limit = 32;
2952
2953        iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2954        iph->nexthdr = IPPROTO_UDP;
2955
2956        ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2957        ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2958
2959        skb->mac_header = (skb->network_header - ETH_HLEN -
2960                           pkt_dev->pkt_overhead);
2961        skb->protocol = protocol;
2962        skb->dev = odev;
2963        skb->pkt_type = PACKET_HOST;
2964
2965        if (pkt_dev->nfrags <= 0)
2966                pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2967        else {
2968                int frags = pkt_dev->nfrags;
2969                int i;
2970
2971                pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2972
2973                if (frags > MAX_SKB_FRAGS)
2974                        frags = MAX_SKB_FRAGS;
2975                if (datalen > frags * PAGE_SIZE) {
2976                        skb_put(skb, datalen - frags * PAGE_SIZE);
2977                        datalen = frags * PAGE_SIZE;
2978                }
2979
2980                i = 0;
2981                while (datalen > 0) {
2982                        struct page *page = alloc_pages(GFP_KERNEL, 0);
2983                        skb_shinfo(skb)->frags[i].page = page;
2984                        skb_shinfo(skb)->frags[i].page_offset = 0;
2985                        skb_shinfo(skb)->frags[i].size =
2986                            (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2987                        datalen -= skb_shinfo(skb)->frags[i].size;
2988                        skb->len += skb_shinfo(skb)->frags[i].size;
2989                        skb->data_len += skb_shinfo(skb)->frags[i].size;
2990                        i++;
2991                        skb_shinfo(skb)->nr_frags = i;
2992                }
2993
2994                while (i < frags) {
2995                        int rem;
2996
2997                        if (i == 0)
2998                                break;
2999
3000                        rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3001                        if (rem == 0)
3002                                break;
3003
3004                        skb_shinfo(skb)->frags[i - 1].size -= rem;
3005
3006                        skb_shinfo(skb)->frags[i] =
3007                            skb_shinfo(skb)->frags[i - 1];
3008                        get_page(skb_shinfo(skb)->frags[i].page);
3009                        skb_shinfo(skb)->frags[i].page =
3010                            skb_shinfo(skb)->frags[i - 1].page;
3011                        skb_shinfo(skb)->frags[i].page_offset +=
3012                            skb_shinfo(skb)->frags[i - 1].size;
3013                        skb_shinfo(skb)->frags[i].size = rem;
3014                        i++;
3015                        skb_shinfo(skb)->nr_frags = i;
3016                }
3017        }
3018
3019        /* Stamp the time, and sequence number, convert them to network byte order */
3020        /* should we update cloned packets too ? */
3021        if (pgh) {
3022                struct timeval timestamp;
3023
3024                pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3025                pgh->seq_num = htonl(pkt_dev->seq_num);
3026
3027                do_gettimeofday(&timestamp);
3028                pgh->tv_sec = htonl(timestamp.tv_sec);
3029                pgh->tv_usec = htonl(timestamp.tv_usec);
3030        }
3031        /* pkt_dev->seq_num++; FF: you really mean this? */
3032
3033        return skb;
3034}
3035
3036static inline struct sk_buff *fill_packet(struct net_device *odev,
3037                                          struct pktgen_dev *pkt_dev)
3038{
3039        if (pkt_dev->flags & F_IPV6)
3040                return fill_packet_ipv6(odev, pkt_dev);
3041        else
3042                return fill_packet_ipv4(odev, pkt_dev);
3043}
3044
3045static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3046{
3047        pkt_dev->seq_num = 1;
3048        pkt_dev->idle_acc = 0;
3049        pkt_dev->sofar = 0;
3050        pkt_dev->tx_bytes = 0;
3051        pkt_dev->errors = 0;
3052}
3053
3054/* Set up structure for sending pkts, clear counters */
3055
3056static void pktgen_run(struct pktgen_thread *t)
3057{
3058        struct pktgen_dev *pkt_dev;
3059        int started = 0;
3060
3061        pr_debug("pktgen: entering pktgen_run. %p\n", t);
3062
3063        if_lock(t);
3064        list_for_each_entry(pkt_dev, &t->if_list, list) {
3065
3066                /*
3067                 * setup odev and create initial packet.
3068                 */
3069                pktgen_setup_inject(pkt_dev);
3070
3071                if (pkt_dev->odev) {
3072                        pktgen_clear_counters(pkt_dev);
3073                        pkt_dev->running = 1;   /* Cranke yeself! */
3074                        pkt_dev->skb = NULL;
3075                        pkt_dev->started_at = getCurUs();
3076                        pkt_dev->next_tx_us = getCurUs();       /* Transmit immediately */
3077                        pkt_dev->next_tx_ns = 0;
3078                        set_pkt_overhead(pkt_dev);
3079
3080                        strcpy(pkt_dev->result, "Starting");
3081                        started++;
3082                } else
3083                        strcpy(pkt_dev->result, "Error starting");
3084        }
3085        if_unlock(t);
3086        if (started)
3087                t->control &= ~(T_STOP);
3088}
3089
3090static void pktgen_stop_all_threads_ifs(void)
3091{
3092        struct pktgen_thread *t;
3093
3094        pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3095
3096        mutex_lock(&pktgen_thread_lock);
3097
3098        list_for_each_entry(t, &pktgen_threads, th_list)
3099                t->control |= T_STOP;
3100
3101        mutex_unlock(&pktgen_thread_lock);
3102}
3103
3104static int thread_is_running(struct pktgen_thread *t)
3105{
3106        struct pktgen_dev *pkt_dev;
3107        int res = 0;
3108
3109        list_for_each_entry(pkt_dev, &t->if_list, list)
3110                if (pkt_dev->running) {
3111                        res = 1;
3112                        break;
3113                }
3114        return res;
3115}
3116
3117static int pktgen_wait_thread_run(struct pktgen_thread *t)
3118{
3119        if_lock(t);
3120
3121        while (thread_is_running(t)) {
3122
3123                if_unlock(t);
3124
3125                msleep_interruptible(100);
3126
3127                if (signal_pending(current))
3128                        goto signal;
3129                if_lock(t);
3130        }
3131        if_unlock(t);
3132        return 1;
3133signal:
3134        return 0;
3135}
3136
3137static int pktgen_wait_all_threads_run(void)
3138{
3139        struct pktgen_thread *t;
3140        int sig = 1;
3141
3142        mutex_lock(&pktgen_thread_lock);
3143
3144        list_for_each_entry(t, &pktgen_threads, th_list) {
3145                sig = pktgen_wait_thread_run(t);
3146                if (sig == 0)
3147                        break;
3148        }
3149
3150        if (sig == 0)
3151                list_for_each_entry(t, &pktgen_threads, th_list)
3152                        t->control |= (T_STOP);
3153
3154        mutex_unlock(&pktgen_thread_lock);
3155        return sig;
3156}
3157
3158static void pktgen_run_all_threads(void)
3159{
3160        struct pktgen_thread *t;
3161
3162        pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3163
3164        mutex_lock(&pktgen_thread_lock);
3165
3166        list_for_each_entry(t, &pktgen_threads, th_list)
3167                t->control |= (T_RUN);
3168
3169        mutex_unlock(&pktgen_thread_lock);
3170
3171        schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
3172
3173        pktgen_wait_all_threads_run();
3174}
3175
3176static void pktgen_reset_all_threads(void)
3177{
3178        struct pktgen_thread *t;
3179
3180        pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3181
3182        mutex_lock(&pktgen_thread_lock);
3183
3184        list_for_each_entry(t, &pktgen_threads, th_list)
3185                t->control |= (T_REMDEVALL);
3186
3187        mutex_unlock(&pktgen_thread_lock);
3188
3189        schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
3190
3191        pktgen_wait_all_threads_run();
3192}
3193
3194static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3195{
3196        __u64 total_us, bps, mbps, pps, idle;
3197        char *p = pkt_dev->result;
3198
3199        total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3200
3201        idle = pkt_dev->idle_acc;
3202
3203        p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3204                     (unsigned long long)total_us,
3205                     (unsigned long long)(total_us - idle),
3206                     (unsigned long long)idle,
3207                     (unsigned long long)pkt_dev->sofar,
3208                     pkt_dev->cur_pkt_size, nr_frags);
3209
3210        pps = pkt_dev->sofar * USEC_PER_SEC;
3211
3212        while ((total_us >> 32) != 0) {
3213                pps >>= 1;
3214                total_us >>= 1;
3215        }
3216
3217        do_div(pps, total_us);
3218
3219        bps = pps * 8 * pkt_dev->cur_pkt_size;
3220
3221        mbps = bps;
3222        do_div(mbps, 1000000);
3223        p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
3224                     (unsigned long long)pps,
3225                     (unsigned long long)mbps,
3226                     (unsigned long long)bps,
3227                     (unsigned long long)pkt_dev->errors);
3228}
3229
3230/* Set stopped-at timer, remove from running list, do counters & statistics */
3231
3232static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3233{
3234        int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3235
3236        if (!pkt_dev->running) {
3237                printk(KERN_WARNING "pktgen: interface: %s is already "
3238                       "stopped\n", pkt_dev->odev->name);
3239                return -EINVAL;
3240        }
3241
3242        pkt_dev->stopped_at = getCurUs();
3243        pkt_dev->running = 0;
3244
3245        show_results(pkt_dev, nr_frags);
3246
3247        return 0;
3248}
3249
3250static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3251{
3252        struct pktgen_dev *pkt_dev, *best = NULL;
3253
3254        if_lock(t);
3255
3256        list_for_each_entry(pkt_dev, &t->if_list, list) {
3257                if (!pkt_dev->running)
3258                        continue;
3259                if (best == NULL)
3260                        best = pkt_dev;
3261                else if (pkt_dev->next_tx_us < best->next_tx_us)
3262                        best = pkt_dev;
3263        }
3264        if_unlock(t);
3265        return best;
3266}
3267
3268static void pktgen_stop(struct pktgen_thread *t)
3269{
3270        struct pktgen_dev *pkt_dev;
3271
3272        pr_debug("pktgen: entering pktgen_stop\n");
3273
3274        if_lock(t);
3275
3276        list_for_each_entry(pkt_dev, &t->if_list, list) {
3277                pktgen_stop_device(pkt_dev);
3278                kfree_skb(pkt_dev->skb);
3279
3280                pkt_dev->skb = NULL;
3281        }
3282
3283        if_unlock(t);
3284}
3285
3286/*
3287 * one of our devices needs to be removed - find it
3288 * and remove it
3289 */
3290static void pktgen_rem_one_if(struct pktgen_thread *t)
3291{
3292        struct list_head *q, *n;
3293        struct pktgen_dev *cur;
3294
3295        pr_debug("pktgen: entering pktgen_rem_one_if\n");
3296
3297        if_lock(t);
3298
3299        list_for_each_safe(q, n, &t->if_list) {
3300                cur = list_entry(q, struct pktgen_dev, list);
3301
3302                if (!cur->removal_mark)
3303                        continue;
3304
3305                kfree_skb(cur->skb);
3306                cur->skb = NULL;
3307
3308                pktgen_remove_device(t, cur);
3309
3310                break;
3311        }
3312
3313        if_unlock(t);
3314}
3315
3316static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3317{
3318        struct list_head *q, *n;
3319        struct pktgen_dev *cur;
3320
3321        /* Remove all devices, free mem */
3322
3323        pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3324        if_lock(t);
3325
3326        list_for_each_safe(q, n, &t->if_list) {
3327                cur = list_entry(q, struct pktgen_dev, list);
3328
3329                kfree_skb(cur->skb);
3330                cur->skb = NULL;
3331
3332                pktgen_remove_device(t, cur);
3333        }
3334
3335        if_unlock(t);
3336}
3337
3338static void pktgen_rem_thread(struct pktgen_thread *t)
3339{
3340        /* Remove from the thread list */
3341
3342        remove_proc_entry(t->tsk->comm, pg_proc_dir);
3343
3344        mutex_lock(&pktgen_thread_lock);
3345
3346        list_del(&t->th_list);
3347
3348        mutex_unlock(&pktgen_thread_lock);
3349}
3350
3351static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3352{
3353        struct net_device *odev = pkt_dev->odev;
3354        int (*xmit)(struct sk_buff *, struct net_device *)
3355                = odev->netdev_ops->ndo_start_xmit;
3356        struct netdev_queue *txq;
3357        __u64 idle_start = 0;
3358        u16 queue_map;
3359        int ret;
3360
3361        if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3362                u64 now;
3363
3364                now = getCurUs();
3365                if (now < pkt_dev->next_tx_us)
3366                        spin(pkt_dev, pkt_dev->next_tx_us);
3367
3368                /* This is max DELAY, this has special meaning of
3369                 * "never transmit"
3370                 */
3371                if (pkt_dev->delay_us == 0x7FFFFFFF) {
3372                        pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3373                        pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3374                        goto out;
3375                }
3376        }
3377
3378        if (!pkt_dev->skb) {
3379                set_cur_queue_map(pkt_dev);
3380                queue_map = pkt_dev->cur_queue_map;
3381        } else {
3382                queue_map = skb_get_queue_mapping(pkt_dev->skb);
3383        }
3384
3385        txq = netdev_get_tx_queue(odev, queue_map);
3386        if (netif_tx_queue_stopped(txq) ||
3387            netif_tx_queue_frozen(txq) ||
3388            need_resched()) {
3389                idle_start = getCurUs();
3390
3391                if (!netif_running(odev)) {
3392                        pktgen_stop_device(pkt_dev);
3393                        kfree_skb(pkt_dev->skb);
3394                        pkt_dev->skb = NULL;
3395                        goto out;
3396                }
3397                if (need_resched())
3398                        schedule();
3399
3400                pkt_dev->idle_acc += getCurUs() - idle_start;
3401
3402                if (netif_tx_queue_stopped(txq) ||
3403                    netif_tx_queue_frozen(txq)) {
3404                        pkt_dev->next_tx_us = getCurUs();       /* TODO */
3405                        pkt_dev->next_tx_ns = 0;
3406                        goto out;       /* Try the next interface */
3407                }
3408        }
3409
3410        if (pkt_dev->last_ok || !pkt_dev->skb) {
3411                if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3412                    || (!pkt_dev->skb)) {
3413                        /* build a new pkt */
3414                        kfree_skb(pkt_dev->skb);
3415
3416                        pkt_dev->skb = fill_packet(odev, pkt_dev);
3417                        if (pkt_dev->skb == NULL) {
3418                                printk(KERN_ERR "pktgen: ERROR: couldn't "
3419                                       "allocate skb in fill_packet.\n");
3420                                schedule();
3421                                pkt_dev->clone_count--; /* back out increment, OOM */
3422                                goto out;
3423                        }
3424                        pkt_dev->allocated_skbs++;
3425                        pkt_dev->clone_count = 0;       /* reset counter */
3426                }
3427        }
3428
3429        /* fill_packet() might have changed the queue */
3430        queue_map = skb_get_queue_mapping(pkt_dev->skb);
3431        txq = netdev_get_tx_queue(odev, queue_map);
3432
3433        __netif_tx_lock_bh(txq);
3434        if (!netif_tx_queue_stopped(txq) &&
3435            !netif_tx_queue_frozen(txq)) {
3436
3437                atomic_inc(&(pkt_dev->skb->users));
3438              retry_now:
3439                ret = (*xmit)(pkt_dev->skb, odev);
3440                if (likely(ret == NETDEV_TX_OK)) {
3441                        pkt_dev->last_ok = 1;
3442                        pkt_dev->sofar++;
3443                        pkt_dev->seq_num++;
3444                        pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3445
3446                } else if (ret == NETDEV_TX_LOCKED
3447                           && (odev->features & NETIF_F_LLTX)) {
3448                        cpu_relax();
3449                        goto retry_now;
3450                } else {        /* Retry it next time */
3451
3452                        atomic_dec(&(pkt_dev->skb->users));
3453
3454                        if (debug && net_ratelimit())
3455                                printk(KERN_INFO "pktgen: Hard xmit error\n");
3456
3457                        pkt_dev->errors++;
3458                        pkt_dev->last_ok = 0;
3459                }
3460
3461                pkt_dev->next_tx_us = getCurUs();
3462                pkt_dev->next_tx_ns = 0;
3463
3464                pkt_dev->next_tx_us += pkt_dev->delay_us;
3465                pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3466
3467                if (pkt_dev->next_tx_ns > 1000) {
3468                        pkt_dev->next_tx_us++;
3469                        pkt_dev->next_tx_ns -= 1000;
3470                }
3471        }
3472
3473        else {                  /* Retry it next time */
3474                pkt_dev->last_ok = 0;
3475                pkt_dev->next_tx_us = getCurUs();       /* TODO */
3476                pkt_dev->next_tx_ns = 0;
3477        }
3478
3479        __netif_tx_unlock_bh(txq);
3480
3481        /* If pkt_dev->count is zero, then run forever */
3482        if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3483                if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3484                        idle_start = getCurUs();
3485                        while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3486                                if (signal_pending(current)) {
3487                                        break;
3488                                }
3489                                schedule();
3490                        }
3491                        pkt_dev->idle_acc += getCurUs() - idle_start;
3492                }
3493
3494                /* Done with this */
3495                pktgen_stop_device(pkt_dev);
3496                kfree_skb(pkt_dev->skb);
3497                pkt_dev->skb = NULL;
3498        }
3499out:;
3500}
3501
3502/*
3503 * Main loop of the thread goes here
3504 */
3505
3506static int pktgen_thread_worker(void *arg)
3507{
3508        DEFINE_WAIT(wait);
3509        struct pktgen_thread *t = arg;
3510        struct pktgen_dev *pkt_dev = NULL;
3511        int cpu = t->cpu;
3512
3513        BUG_ON(smp_processor_id() != cpu);
3514
3515        init_waitqueue_head(&t->queue);
3516        complete(&t->start_done);
3517
3518        pr_debug("pktgen: starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
3519
3520        set_current_state(TASK_INTERRUPTIBLE);
3521
3522        set_freezable();
3523
3524        while (!kthread_should_stop()) {
3525                pkt_dev = next_to_run(t);
3526
3527                if (!pkt_dev &&
3528                    (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3529                    == 0) {
3530                        prepare_to_wait(&(t->queue), &wait,
3531                                        TASK_INTERRUPTIBLE);
3532                        schedule_timeout(HZ / 10);
3533                        finish_wait(&(t->queue), &wait);
3534                }
3535
3536                __set_current_state(TASK_RUNNING);
3537
3538                if (pkt_dev)
3539                        pktgen_xmit(pkt_dev);
3540
3541                if (t->control & T_STOP) {
3542                        pktgen_stop(t);
3543                        t->control &= ~(T_STOP);
3544                }
3545
3546                if (t->control & T_RUN) {
3547                        pktgen_run(t);
3548                        t->control &= ~(T_RUN);
3549                }
3550
3551                if (t->control & T_REMDEVALL) {
3552                        pktgen_rem_all_ifs(t);
3553                        t->control &= ~(T_REMDEVALL);
3554                }
3555
3556                if (t->control & T_REMDEV) {
3557                        pktgen_rem_one_if(t);
3558                        t->control &= ~(T_REMDEV);
3559                }
3560
3561                try_to_freeze();
3562
3563                set_current_state(TASK_INTERRUPTIBLE);
3564        }
3565
3566        pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3567        pktgen_stop(t);
3568
3569        pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3570        pktgen_rem_all_ifs(t);
3571
3572        pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3573        pktgen_rem_thread(t);
3574
3575        return 0;
3576}
3577
3578static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3579                                          const char *ifname)
3580{
3581        struct pktgen_dev *p, *pkt_dev = NULL;
3582        if_lock(t);
3583
3584        list_for_each_entry(p, &t->if_list, list)
3585                if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3586                        pkt_dev = p;
3587                        break;
3588                }
3589
3590        if_unlock(t);
3591        pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3592        return pkt_dev;
3593}
3594
3595/*
3596 * Adds a dev at front of if_list.
3597 */
3598
3599static int add_dev_to_thread(struct pktgen_thread *t,
3600                             struct pktgen_dev *pkt_dev)
3601{
3602        int rv = 0;
3603
3604        if_lock(t);
3605
3606        if (pkt_dev->pg_thread) {
3607                printk(KERN_ERR "pktgen: ERROR: already assigned "
3608                       "to a thread.\n");
3609                rv = -EBUSY;
3610                goto out;
3611        }
3612
3613        list_add(&pkt_dev->list, &t->if_list);
3614        pkt_dev->pg_thread = t;
3615        pkt_dev->running = 0;
3616
3617out:
3618        if_unlock(t);
3619        return rv;
3620}
3621
3622/* Called under thread lock */
3623
3624static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3625{
3626        struct pktgen_dev *pkt_dev;
3627        int err;
3628
3629        /* We don't allow a device to be on several threads */
3630
3631        pkt_dev = __pktgen_NN_threads(ifname, FIND);
3632        if (pkt_dev) {
3633                printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3634                return -EBUSY;
3635        }
3636
3637        pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3638        if (!pkt_dev)
3639                return -ENOMEM;
3640
3641        pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3642        if (pkt_dev->flows == NULL) {
3643                kfree(pkt_dev);
3644                return -ENOMEM;
3645        }
3646        memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3647
3648        pkt_dev->removal_mark = 0;
3649        pkt_dev->min_pkt_size = ETH_ZLEN;
3650        pkt_dev->max_pkt_size = ETH_ZLEN;
3651        pkt_dev->nfrags = 0;
3652        pkt_dev->clone_skb = pg_clone_skb_d;
3653        pkt_dev->delay_us = pg_delay_d / 1000;
3654        pkt_dev->delay_ns = pg_delay_d % 1000;
3655        pkt_dev->count = pg_count_d;
3656        pkt_dev->sofar = 0;
3657        pkt_dev->udp_src_min = 9;       /* sink port */
3658        pkt_dev->udp_src_max = 9;
3659        pkt_dev->udp_dst_min = 9;
3660        pkt_dev->udp_dst_max = 9;
3661
3662        pkt_dev->vlan_p = 0;
3663        pkt_dev->vlan_cfi = 0;
3664        pkt_dev->vlan_id = 0xffff;
3665        pkt_dev->svlan_p = 0;
3666        pkt_dev->svlan_cfi = 0;
3667        pkt_dev->svlan_id = 0xffff;
3668
3669        err = pktgen_setup_dev(pkt_dev, ifname);
3670        if (err)
3671                goto out1;
3672
3673        pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3674                                          &pktgen_if_fops, pkt_dev);
3675        if (!pkt_dev->entry) {
3676                printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3677                       PG_PROC_DIR, ifname);
3678                err = -EINVAL;
3679                goto out2;
3680        }
3681#ifdef CONFIG_XFRM
3682        pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3683        pkt_dev->ipsproto = IPPROTO_ESP;
3684#endif
3685
3686        return add_dev_to_thread(t, pkt_dev);
3687out2:
3688        dev_put(pkt_dev->odev);
3689out1:
3690#ifdef CONFIG_XFRM
3691        free_SAs(pkt_dev);
3692#endif
3693        if (pkt_dev->flows)
3694                vfree(pkt_dev->flows);
3695        kfree(pkt_dev);
3696        return err;
3697}
3698
3699static int __init pktgen_create_thread(int cpu)
3700{
3701        struct pktgen_thread *t;
3702        struct proc_dir_entry *pe;
3703        struct task_struct *p;
3704
3705        t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3706        if (!t) {
3707                printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3708                       "create new thread.\n");
3709                return -ENOMEM;
3710        }
3711
3712        spin_lock_init(&t->if_lock);
3713        t->cpu = cpu;
3714
3715        INIT_LIST_HEAD(&t->if_list);
3716
3717        list_add_tail(&t->th_list, &pktgen_threads);
3718        init_completion(&t->start_done);
3719
3720        p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3721        if (IS_ERR(p)) {
3722                printk(KERN_ERR "pktgen: kernel_thread() failed "
3723                       "for cpu %d\n", t->cpu);
3724                list_del(&t->th_list);
3725                kfree(t);
3726                return PTR_ERR(p);
3727        }
3728        kthread_bind(p, cpu);
3729        t->tsk = p;
3730
3731        pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3732                              &pktgen_thread_fops, t);
3733        if (!pe) {
3734                printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3735                       PG_PROC_DIR, t->tsk->comm);
3736                kthread_stop(p);
3737                list_del(&t->th_list);
3738                kfree(t);
3739                return -EINVAL;
3740        }
3741
3742        wake_up_process(p);
3743        wait_for_completion(&t->start_done);
3744
3745        return 0;
3746}
3747
3748/*
3749 * Removes a device from the thread if_list.
3750 */
3751static void _rem_dev_from_if_list(struct pktgen_thread *t,
3752                                  struct pktgen_dev *pkt_dev)
3753{
3754        struct list_head *q, *n;
3755        struct pktgen_dev *p;
3756
3757        list_for_each_safe(q, n, &t->if_list) {
3758                p = list_entry(q, struct pktgen_dev, list);
3759                if (p == pkt_dev)
3760                        list_del(&p->list);
3761        }
3762}
3763
3764static int pktgen_remove_device(struct pktgen_thread *t,
3765                                struct pktgen_dev *pkt_dev)
3766{
3767
3768        pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3769
3770        if (pkt_dev->running) {
3771                printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3772                       "running interface, stopping it now.\n");
3773                pktgen_stop_device(pkt_dev);
3774        }
3775
3776        /* Dis-associate from the interface */
3777
3778        if (pkt_dev->odev) {
3779                dev_put(pkt_dev->odev);
3780                pkt_dev->odev = NULL;
3781        }
3782
3783        /* And update the thread if_list */
3784
3785        _rem_dev_from_if_list(t, pkt_dev);
3786
3787        if (pkt_dev->entry)
3788                remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3789
3790#ifdef CONFIG_XFRM
3791        free_SAs(pkt_dev);
3792#endif
3793        if (pkt_dev->flows)
3794                vfree(pkt_dev->flows);
3795        kfree(pkt_dev);
3796        return 0;
3797}
3798
3799static int __init pg_init(void)
3800{
3801        int cpu;
3802        struct proc_dir_entry *pe;
3803
3804        printk(KERN_INFO "%s", version);
3805
3806        pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3807        if (!pg_proc_dir)
3808                return -ENODEV;
3809
3810        pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3811        if (pe == NULL) {
3812                printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3813                       "procfs entry.\n", PGCTRL);
3814                proc_net_remove(&init_net, PG_PROC_DIR);
3815                return -EINVAL;
3816        }
3817
3818        /* Register us to receive netdevice events */
3819        register_netdevice_notifier(&pktgen_notifier_block);
3820
3821        for_each_online_cpu(cpu) {
3822                int err;
3823
3824                err = pktgen_create_thread(cpu);
3825                if (err)
3826                        printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3827                               "thread for cpu %d (%d)\n", cpu, err);
3828        }
3829
3830        if (list_empty(&pktgen_threads)) {
3831                printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3832                       "all threads\n");
3833                unregister_netdevice_notifier(&pktgen_notifier_block);
3834                remove_proc_entry(PGCTRL, pg_proc_dir);
3835                proc_net_remove(&init_net, PG_PROC_DIR);
3836                return -ENODEV;
3837        }
3838
3839        return 0;
3840}
3841
3842static void __exit pg_cleanup(void)
3843{
3844        struct pktgen_thread *t;
3845        struct list_head *q, *n;
3846        wait_queue_head_t queue;
3847        init_waitqueue_head(&queue);
3848
3849        /* Stop all interfaces & threads */
3850
3851        list_for_each_safe(q, n, &pktgen_threads) {
3852                t = list_entry(q, struct pktgen_thread, th_list);
3853                kthread_stop(t->tsk);
3854                kfree(t);
3855        }
3856
3857        /* Un-register us from receiving netdevice events */
3858        unregister_netdevice_notifier(&pktgen_notifier_block);
3859
3860        /* Clean up proc file system */
3861        remove_proc_entry(PGCTRL, pg_proc_dir);
3862        proc_net_remove(&init_net, PG_PROC_DIR);
3863}
3864
3865module_init(pg_init);
3866module_exit(pg_cleanup);
3867
3868MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3869MODULE_DESCRIPTION("Packet Generator tool");
3870MODULE_LICENSE("GPL");
3871module_param(pg_count_d, int, 0);
3872module_param(pg_delay_d, int, 0);
3873module_param(pg_clone_skb_d, int, 0);
3874module_param(debug, int, 0);
3875