net/core/pktgen.c

   1 /*
   2  * Authors:
   3  * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
   4  *                             Uppsala University and
   5  *                             Swedish University of Agricultural Sciences
   6  *
   7  * Alexey Kuznetsov  <kuznet@ms2.inr.ac.ru>
   8  * Ben Greear <greearb@candelatech.com>
   9  * Jens Låås <jens.laas@data.slu.se>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version
  14  * 2 of the License, or (at your option) any later version.
  15  *
  16  *
  17  * A tool for loading the network with preconfigurated packets.
  18  * The tool is implemented as a linux module.  Parameters are output
  19  * device, delay (to hard_xmit), number of packets, and whether
  20  * to use multiple SKBs or just the same one.
  21  * pktgen uses the installed interface's output routine.
  22  *
  23  * Additional hacking by:
  24  *
  25  * Jens.Laas@data.slu.se
  26  * Improved by ANK. 010120.
  27  * Improved by ANK even more. 010212.
  28  * MAC address typo fixed. 010417 --ro
  29  * Integrated.  020301 --DaveM
  30  * Added multiskb option 020301 --DaveM
  31  * Scaling of results. 020417--sigurdur@linpro.no
  32  * Significant re-work of the module:
  33  *   *  Convert to threaded model to more efficiently be able to transmit
  34  *       and receive on multiple interfaces at once.
  35  *   *  Converted many counters to __u64 to allow longer runs.
  36  *   *  Allow configuration of ranges, like min/max IP address, MACs,
  37  *       and UDP-ports, for both source and destination, and can
  38  *       set to use a random distribution or sequentially walk the range.
  39  *   *  Can now change most values after starting.
  40  *   *  Place 12-byte packet in UDP payload with magic number,
  41  *       sequence number, and timestamp.
  42  *   *  Add receiver code that detects dropped pkts, re-ordered pkts, and
  43  *       latencies (with micro-second) precision.
  44  *   *  Add IOCTL interface to easily get counters & configuration.
  45  *   --Ben Greear <greearb@candelatech.com>
  46  *
  47  * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
  48  * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
  49  * as a "fastpath" with a configurable number of clones after alloc's.
  50  * clone_skb=0 means all packets are allocated this also means ranges time
  51  * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
  52  * clones.
  53  *
  54  * Also moved to /proc/net/pktgen/
  55  * --ro
  56  *
  57  * Sept 10:  Fixed threading/locking.  Lots of bone-headed and more clever
  58  *    mistakes.  Also merged in DaveM's patch in the -pre6 patch.
  59  * --Ben Greear <greearb@candelatech.com>
  60  *
  61  * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
  62  *
  63  *
  64  * 021124 Finished major redesign and rewrite for new functionality.
  65  * See Documentation/networking/pktgen.txt for how to use this.
  66  *
  67  * The new operation:
  68  * For each CPU one thread/process is created at start. This process checks
  69  * for running devices in the if_list and sends packets until count is 0 it
  70  * also the thread checks the thread->control which is used for inter-process
  71  * communication. controlling process "posts" operations to the threads this
  72  * way. The if_lock should be possible to remove when add/rem_device is merged
  73  * into this too.
  74  *
  75  * By design there should only be *one* "controlling" process. In practice
  76  * multiple write accesses gives unpredictable result. Understood by "write"
  77  * to /proc gives result code thats should be read be the "writer".
  78  * For practical use this should be no problem.
  79  *
  80  * Note when adding devices to a specific CPU there good idea to also assign
  81  * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
  82  * --ro
  83  *
  84  * Fix refcount off by one if first packet fails, potential null deref,
  85  * memleak 030710- KJP
  86  *
  87  * First "ranges" functionality for ipv6 030726 --ro
  88  *
  89  * Included flow support. 030802 ANK.
  90  *
  91  * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
  92  *
  93  * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
  94  * ia64 compilation fix from  Aron Griffis <aron@hp.com> 040604
  95  *
  96  * New xmit() return, do_div and misc clean up by Stephen Hemminger
  97  * <shemminger@osdl.org> 040923
  98  *
  99  * Randy Dunlap fixed u64 printk compiler waring
 100  *
 101  * Remove FCS from BW calculation.  Lennert Buytenhek <buytenh@wantstofly.org>
 102  * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
 103  *
 104  * Corrections from Nikolai Malykh (nmalykh@bilim.com)
 105  * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
 106  *
 107  * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
 108  * 050103
 109  *
 110  * MPLS support by Steven Whitehouse <steve@chygwyn.com>
 111  *
 112  * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
 113  *
 114  * Fixed src_mac command to set source mac of packet to value specified in
 115  * command by Adit Ranadive <adit.262@gmail.com>
 116  *
 117  */
 118 #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/hrtimer.h>
 135 #include <linux/freezer.h>
 136 #include <linux/delay.h>
 137 #include <linux/timer.h>
 138 #include <linux/list.h>
 139 #include <linux/init.h>
 140 #include <linux/skbuff.h>
 141 #include <linux/netdevice.h>
 142 #include <linux/inet.h>
 143 #include <linux/inetdevice.h>
 144 #include <linux/rtnetlink.h>
 145 #include <linux/if_arp.h>
 146 #include <linux/if_vlan.h>
 147 #include <linux/in.h>
 148 #include <linux/ip.h>
 149 #include <linux/ipv6.h>
 150 #include <linux/udp.h>
 151 #include <linux/proc_fs.h>
 152 #include <linux/seq_file.h>
 153 #include <linux/wait.h>
 154 #include <linux/etherdevice.h>
 155 #include <linux/kthread.h>
 156 #include <net/net_namespace.h>
 157 #include <net/checksum.h>
 158 #include <net/ipv6.h>
 159 #include <net/addrconf.h>
 160 #ifdef CONFIG_XFRM
 161 #include <net/xfrm.h>
 162 #endif
 163 #include <asm/byteorder.h>
 164 #include <linux/rcupdate.h>
 165 #include <linux/bitops.h>
 166 #include <linux/io.h>
 167 #include <linux/timex.h>
 168 #include <linux/uaccess.h>
 169 #include <asm/dma.h>
 170 #include <asm/div64.h>          /* do_div */
 171
 172 #define VERSION         "2.72"
 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_STOP        (1<<0)    /* Stop run */
 196 #define T_RUN         (1<<1)    /* Start run */
 197 #define T_REMDEVALL   (1<<2)    /* Remove all devs */
 198 #define T_REMDEV      (1<<3)    /* Remove one dev */
 199
 200 /* If lock -- can be removed after some work */
 201 #define   if_lock(t)           spin_lock(&(t->if_lock));
 202 #define   if_unlock(t)           spin_unlock(&(t->if_lock));
 203
 204 /* Used to help with determining the pkts on receive */
 205 #define PKTGEN_MAGIC 0xbe9be955
 206 #define PG_PROC_DIR "pktgen"
 207 #define PGCTRL      "pgctrl"
 208 static struct proc_dir_entry *pg_proc_dir;
 209
 210 #define MAX_CFLOWS  65536
 211
 212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
 213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
 214
 215 struct flow_state {
 216         __be32 cur_daddr;
 217         int count;
 218 #ifdef CONFIG_XFRM
 219         struct xfrm_state *x;
 220 #endif
 221         __u32 flags;
 222 };
 223
 224 /* flow flag bits */
 225 #define F_INIT   (1<<0)         /* flow has been initialized */
 226
 227 struct pktgen_dev {
 228         /*
 229          * Try to keep frequent/infrequent used vars. separated.
 230          */
 231         struct proc_dir_entry *entry;   /* proc file */
 232         struct pktgen_thread *pg_thread;/* the owner */
 233         struct list_head list;          /* chaining in the thread's run-queue */
 234
 235         int running;            /* if false, the test will stop */
 236
 237         /* If min != max, then we will either do a linear iteration, or
 238          * we will do a random selection from within the range.
 239          */
 240         __u32 flags;
 241         int removal_mark;       /* non-zero => the device is marked for
 242                                  * removal by worker thread */
 243
 244         int min_pkt_size;       /* = ETH_ZLEN; */
 245         int max_pkt_size;       /* = ETH_ZLEN; */
 246         int pkt_overhead;       /* overhead for MPLS, VLANs, IPSEC etc */
 247         int nfrags;
 248         u64 delay;              /* nano-seconds */
 249
 250         __u64 count;            /* Default No packets to send */
 251         __u64 sofar;            /* How many pkts we've sent so far */
 252         __u64 tx_bytes;         /* How many bytes we've transmitted */
 253         __u64 errors;           /* Errors when trying to transmit,
 254                                    pkts will be re-sent */
 255
 256         /* runtime counters relating to clone_skb */
 257
 258         __u64 allocated_skbs;
 259         __u32 clone_count;
 260         int last_ok;            /* Was last skb sent?
 261                                  * Or a failed transmit of some sort?
 262                                  * This will keep sequence numbers in order
 263                                  */
 264         ktime_t next_tx;
 265         ktime_t started_at;
 266         ktime_t stopped_at;
 267         u64     idle_acc;       /* nano-seconds */
 268
 269         __u32 seq_num;
 270
 271         int clone_skb;          /*
 272                                  * Use multiple SKBs during packet gen.
 273                                  * If this number is greater than 1, then
 274                                  * that many copies of the same packet will be
 275                                  * sent before a new packet is allocated.
 276                                  * If you want to send 1024 identical packets
 277                                  * before creating a new packet,
 278                                  * set clone_skb to 1024.
 279                                  */
 280
 281         char dst_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 282         char dst_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 283         char src_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 284         char src_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 285
 286         struct in6_addr in6_saddr;
 287         struct in6_addr in6_daddr;
 288         struct in6_addr cur_in6_daddr;
 289         struct in6_addr cur_in6_saddr;
 290         /* For ranges */
 291         struct in6_addr min_in6_daddr;
 292         struct in6_addr max_in6_daddr;
 293         struct in6_addr min_in6_saddr;
 294         struct in6_addr max_in6_saddr;
 295
 296         /* If we're doing ranges, random or incremental, then this
 297          * defines the min/max for those ranges.
 298          */
 299         __be32 saddr_min;       /* inclusive, source IP address */
 300         __be32 saddr_max;       /* exclusive, source IP address */
 301         __be32 daddr_min;       /* inclusive, dest IP address */
 302         __be32 daddr_max;       /* exclusive, dest IP address */
 303
 304         __u16 udp_src_min;      /* inclusive, source UDP port */
 305         __u16 udp_src_max;      /* exclusive, source UDP port */
 306         __u16 udp_dst_min;      /* inclusive, dest UDP port */
 307         __u16 udp_dst_max;      /* exclusive, dest UDP port */
 308
 309         /* DSCP + ECN */
 310         __u8 tos;            /* six MSB of (former) IPv4 TOS
 311                                 are for dscp codepoint */
 312         __u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6
 313                                 (see RFC 3260, sec. 4) */
 314
 315         /* MPLS */
 316         unsigned nr_labels;     /* Depth of stack, 0 = no MPLS */
 317         __be32 labels[MAX_MPLS_LABELS];
 318
 319         /* VLAN/SVLAN (802.1Q/Q-in-Q) */
 320         __u8  vlan_p;
 321         __u8  vlan_cfi;
 322         __u16 vlan_id;  /* 0xffff means no vlan tag */
 323
 324         __u8  svlan_p;
 325         __u8  svlan_cfi;
 326         __u16 svlan_id; /* 0xffff means no svlan tag */
 327
 328         __u32 src_mac_count;    /* How many MACs to iterate through */
 329         __u32 dst_mac_count;    /* How many MACs to iterate through */
 330
 331         unsigned char dst_mac[ETH_ALEN];
 332         unsigned char src_mac[ETH_ALEN];
 333
 334         __u32 cur_dst_mac_offset;
 335         __u32 cur_src_mac_offset;
 336         __be32 cur_saddr;
 337         __be32 cur_daddr;
 338         __u16 cur_udp_dst;
 339         __u16 cur_udp_src;
 340         __u16 cur_queue_map;
 341         __u32 cur_pkt_size;
 342
 343         __u8 hh[14];
 344         /* = {
 345            0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
 346
 347            We fill in SRC address later
 348            0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 349            0x08, 0x00
 350            };
 351          */
 352         __u16 pad;              /* pad out the hh struct to an even 16 bytes */
 353
 354         struct sk_buff *skb;    /* skb we are to transmit next, used for when we
 355                                  * are transmitting the same one multiple times
 356                                  */
 357         struct net_device *odev; /* The out-going device.
 358                                   * Note that the device should have it's
 359                                   * pg_info pointer pointing back to this
 360                                   * device.
 361                                   * Set when the user specifies the out-going
 362                                   * device name (not when the inject is
 363                                   * started as it used to do.)
 364                                   */
 365         struct flow_state *flows;
 366         unsigned cflows;        /* Concurrent flows (config) */
 367         unsigned lflow;         /* Flow length  (config) */
 368         unsigned nflows;        /* accumulated flows (stats) */
 369         unsigned curfl;         /* current sequenced flow (state)*/
 370
 371         u16 queue_map_min;
 372         u16 queue_map_max;
 373
 374 #ifdef CONFIG_XFRM
 375         __u8    ipsmode;                /* IPSEC mode (config) */
 376         __u8    ipsproto;               /* IPSEC type (config) */
 377 #endif
 378         char result[512];
 379 };
 380
 381 struct pktgen_hdr {
 382         __be32 pgh_magic;
 383         __be32 seq_num;
 384         __be32 tv_sec;
 385         __be32 tv_usec;
 386 };
 387
 388 struct pktgen_thread {
 389         spinlock_t if_lock;             /* for list of devices */
 390         struct list_head if_list;       /* All device here */
 391         struct list_head th_list;
 392         struct task_struct *tsk;
 393         char result[512];
 394
 395         /* Field for thread to receive "posted" events terminate,
 396            stop ifs etc. */
 397
 398         u32 control;
 399         int cpu;
 400
 401         wait_queue_head_t queue;
 402         struct completion start_done;
 403 };
 404
 405 #define REMOVE 1
 406 #define FIND   0
 407
 408 static inline ktime_t ktime_now(void)
 409 {
 410         struct timespec ts;
 411         ktime_get_ts(&ts);
 412
 413         return timespec_to_ktime(ts);
 414 }
 415
 416 /* This works even if 32 bit because of careful byte order choice */
 417 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
 418 {
 419         return cmp1.tv64 < cmp2.tv64;
 420 }
 421
 422 static const char version[] =
 423         "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
 424
 425 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
 426 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
 427 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
 428                                           const char *ifname);
 429 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
 430 static void pktgen_run_all_threads(void);
 431 static void pktgen_reset_all_threads(void);
 432 static void pktgen_stop_all_threads_ifs(void);
 433
 434 static void pktgen_stop(struct pktgen_thread *t);
 435 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
 436
 437 static unsigned int scan_ip6(const char *s, char ip[16]);
 438 static unsigned int fmt_ip6(char *s, const char ip[16]);
 439
 440 /* Module parameters, defaults. */
 441 static int pg_count_d __read_mostly = 1000;
 442 static int pg_delay_d __read_mostly;
 443 static int pg_clone_skb_d  __read_mostly;
 444 static int debug  __read_mostly;
 445
 446 static DEFINE_MUTEX(pktgen_thread_lock);
 447 static LIST_HEAD(pktgen_threads);
 448
 449 static struct notifier_block pktgen_notifier_block = {
 450         .notifier_call = pktgen_device_event,
 451 };
 452
 453 /*
 454  * /proc handling functions
 455  *
 456  */
 457
 458 static int pgctrl_show(struct seq_file *seq, void *v)
 459 {
 460         seq_puts(seq, version);
 461         return 0;
 462 }
 463
 464 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
 465                             size_t count, loff_t *ppos)
 466 {
 467         int err = 0;
 468         char data[128];
 469
 470         if (!capable(CAP_NET_ADMIN)) {
 471                 err = -EPERM;
 472                 goto out;
 473         }
 474
 475         if (count > sizeof(data))
 476                 count = sizeof(data);
 477
 478         if (copy_from_user(data, buf, count)) {
 479                 err = -EFAULT;
 480                 goto out;
 481         }
 482         data[count - 1] = 0;    /* Make string */
 483
 484         if (!strcmp(data, "stop"))
 485                 pktgen_stop_all_threads_ifs();
 486
 487         else if (!strcmp(data, "start"))
 488                 pktgen_run_all_threads();
 489
 490         else if (!strcmp(data, "reset"))
 491                 pktgen_reset_all_threads();
 492
 493         else
 494                 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
 495
 496         err = count;
 497
 498 out:
 499         return err;
 500 }
 501
 502 static int pgctrl_open(struct inode *inode, struct file *file)
 503 {
 504         return single_open(file, pgctrl_show, PDE(inode)->data);
 505 }
 506
 507 static const struct file_operations pktgen_fops = {
 508         .owner   = THIS_MODULE,
 509         .open    = pgctrl_open,
 510         .read    = seq_read,
 511         .llseek  = seq_lseek,
 512         .write   = pgctrl_write,
 513         .release = single_release,
 514 };
 515
 516 static int pktgen_if_show(struct seq_file *seq, void *v)
 517 {
 518         const struct pktgen_dev *pkt_dev = seq->private;
 519         ktime_t stopped;
 520         u64 idle;
 521
 522         seq_printf(seq,
 523                    "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
 524                    (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
 525                    pkt_dev->max_pkt_size);
 526
 527         seq_printf(seq,
 528                    "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
 529                    pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
 530                    pkt_dev->clone_skb, pkt_dev->odev->name);
 531
 532         seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
 533                    pkt_dev->lflow);
 534
 535         seq_printf(seq,
 536                    "     queue_map_min: %u  queue_map_max: %u\n",
 537                    pkt_dev->queue_map_min,
 538                    pkt_dev->queue_map_max);
 539
 540         if (pkt_dev->flags & F_IPV6) {
 541                 char b1[128], b2[128], b3[128];
 542                 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
 543                 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
 544                 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
 545                 seq_printf(seq,
 546                            "     saddr: %s  min_saddr: %s  max_saddr: %s\n", b1,
 547                            b2, b3);
 548
 549                 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
 550                 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
 551                 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
 552                 seq_printf(seq,
 553                            "     daddr: %s  min_daddr: %s  max_daddr: %s\n", b1,
 554                            b2, b3);
 555
 556         } else {
 557                 seq_printf(seq,
 558                            "     dst_min: %s  dst_max: %s\n",
 559                            pkt_dev->dst_min, pkt_dev->dst_max);
 560                 seq_printf(seq,
 561                            "        src_min: %s  src_max: %s\n",
 562                            pkt_dev->src_min, pkt_dev->src_max);
 563         }
 564
 565         seq_puts(seq, "     src_mac: ");
 566
 567         seq_printf(seq, "%pM ",
 568                    is_zero_ether_addr(pkt_dev->src_mac) ?
 569                              pkt_dev->odev->dev_addr : pkt_dev->src_mac);
 570
 571         seq_printf(seq, "dst_mac: ");
 572         seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
 573
 574         seq_printf(seq,
 575                    "     udp_src_min: %d  udp_src_max: %d"
 576                    "  udp_dst_min: %d  udp_dst_max: %d\n",
 577                    pkt_dev->udp_src_min, pkt_dev->udp_src_max,
 578                    pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
 579
 580         seq_printf(seq,
 581                    "     src_mac_count: %d  dst_mac_count: %d\n",
 582                    pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
 583
 584         if (pkt_dev->nr_labels) {
 585                 unsigned i;
 586                 seq_printf(seq, "     mpls: ");
 587                 for (i = 0; i < pkt_dev->nr_labels; i++)
 588                         seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
 589                                    i == pkt_dev->nr_labels-1 ? "\n" : ", ");
 590         }
 591
 592         if (pkt_dev->vlan_id != 0xffff)
 593                 seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 594                            pkt_dev->vlan_id, pkt_dev->vlan_p,
 595                            pkt_dev->vlan_cfi);
 596
 597         if (pkt_dev->svlan_id != 0xffff)
 598                 seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 599                            pkt_dev->svlan_id, pkt_dev->svlan_p,
 600                            pkt_dev->svlan_cfi);
 601
 602         if (pkt_dev->tos)
 603                 seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
 604
 605         if (pkt_dev->traffic_class)
 606                 seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
 607
 608         seq_printf(seq, "     Flags: ");
 609
 610         if (pkt_dev->flags & F_IPV6)
 611                 seq_printf(seq, "IPV6  ");
 612
 613         if (pkt_dev->flags & F_IPSRC_RND)
 614                 seq_printf(seq, "IPSRC_RND  ");
 615
 616         if (pkt_dev->flags & F_IPDST_RND)
 617                 seq_printf(seq, "IPDST_RND  ");
 618
 619         if (pkt_dev->flags & F_TXSIZE_RND)
 620                 seq_printf(seq, "TXSIZE_RND  ");
 621
 622         if (pkt_dev->flags & F_UDPSRC_RND)
 623                 seq_printf(seq, "UDPSRC_RND  ");
 624
 625         if (pkt_dev->flags & F_UDPDST_RND)
 626                 seq_printf(seq, "UDPDST_RND  ");
 627
 628         if (pkt_dev->flags & F_MPLS_RND)
 629                 seq_printf(seq,  "MPLS_RND  ");
 630
 631         if (pkt_dev->flags & F_QUEUE_MAP_RND)
 632                 seq_printf(seq,  "QUEUE_MAP_RND  ");
 633
 634         if (pkt_dev->flags & F_QUEUE_MAP_CPU)
 635                 seq_printf(seq,  "QUEUE_MAP_CPU  ");
 636
 637         if (pkt_dev->cflows) {
 638                 if (pkt_dev->flags & F_FLOW_SEQ)
 639                         seq_printf(seq,  "FLOW_SEQ  "); /*in sequence flows*/
 640                 else
 641                         seq_printf(seq,  "FLOW_RND  ");
 642         }
 643
 644 #ifdef CONFIG_XFRM
 645         if (pkt_dev->flags & F_IPSEC_ON)
 646                 seq_printf(seq,  "IPSEC  ");
 647 #endif
 648
 649         if (pkt_dev->flags & F_MACSRC_RND)
 650                 seq_printf(seq, "MACSRC_RND  ");
 651
 652         if (pkt_dev->flags & F_MACDST_RND)
 653                 seq_printf(seq, "MACDST_RND  ");
 654
 655         if (pkt_dev->flags & F_VID_RND)
 656                 seq_printf(seq, "VID_RND  ");
 657
 658         if (pkt_dev->flags & F_SVID_RND)
 659                 seq_printf(seq, "SVID_RND  ");
 660
 661         seq_puts(seq, "\n");
 662
 663         /* not really stopped, more like last-running-at */
 664         stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
 665         idle = pkt_dev->idle_acc;
 666         do_div(idle, NSEC_PER_USEC);
 667
 668         seq_printf(seq,
 669                    "Current:\n     pkts-sofar: %llu  errors: %llu\n",
 670                    (unsigned long long)pkt_dev->sofar,
 671                    (unsigned long long)pkt_dev->errors);
 672
 673         seq_printf(seq,
 674                    "     started: %lluus  stopped: %lluus idle: %lluus\n",
 675                    (unsigned long long) ktime_to_us(pkt_dev->started_at),
 676                    (unsigned long long) ktime_to_us(stopped),
 677                    (unsigned long long) idle);
 678
 679         seq_printf(seq,
 680                    "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
 681                    pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
 682                    pkt_dev->cur_src_mac_offset);
 683
 684         if (pkt_dev->flags & F_IPV6) {
 685                 char b1[128], b2[128];
 686                 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
 687                 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
 688                 seq_printf(seq, "     cur_saddr: %s  cur_daddr: %s\n", b2, b1);
 689         } else
 690                 seq_printf(seq, "     cur_saddr: 0x%x  cur_daddr: 0x%x\n",
 691                            pkt_dev->cur_saddr, pkt_dev->cur_daddr);
 692
 693         seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
 694                    pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
 695
 696         seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
 697
 698         seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
 699
 700         if (pkt_dev->result[0])
 701                 seq_printf(seq, "Result: %s\n", pkt_dev->result);
 702         else
 703                 seq_printf(seq, "Result: Idle\n");
 704
 705         return 0;
 706 }
 707
 708
 709 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
 710                      __u32 *num)
 711 {
 712         int i = 0;
 713         *num = 0;
 714
 715         for (; i < maxlen; i++) {
 716                 char c;
 717                 *num <<= 4;
 718                 if (get_user(c, &user_buffer[i]))
 719                         return -EFAULT;
 720                 if ((c >= '0') && (c <= '9'))
 721                         *num |= c - '0';
 722                 else if ((c >= 'a') && (c <= 'f'))
 723                         *num |= c - 'a' + 10;
 724                 else if ((c >= 'A') && (c <= 'F'))
 725                         *num |= c - 'A' + 10;
 726                 else
 727                         break;
 728         }
 729         return i;
 730 }
 731
 732 static int count_trail_chars(const char __user * user_buffer,
 733                              unsigned int maxlen)
 734 {
 735         int i;
 736
 737         for (i = 0; i < maxlen; i++) {
 738                 char c;
 739                 if (get_user(c, &user_buffer[i]))
 740                         return -EFAULT;
 741                 switch (c) {
 742                 case '\"':
 743                 case '\n':
 744                 case '\r':
 745                 case '\t':
 746                 case ' ':
 747                 case '=':
 748                         break;
 749                 default:
 750                         goto done;
 751                 }
 752         }
 753 done:
 754         return i;
 755 }
 756
 757 static unsigned long num_arg(const char __user * user_buffer,
 758                              unsigned long maxlen, unsigned long *num)
 759 {
 760         int i = 0;
 761         *num = 0;
 762
 763         for (; i < maxlen; i++) {
 764                 char c;
 765                 if (get_user(c, &user_buffer[i]))
 766                         return -EFAULT;
 767                 if ((c >= '0') && (c <= '9')) {
 768                         *num *= 10;
 769                         *num += c - '0';
 770                 } else
 771                         break;
 772         }
 773         return i;
 774 }
 775
 776 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
 777 {
 778         int i = 0;
 779
 780         for (; i < maxlen; i++) {
 781                 char c;
 782                 if (get_user(c, &user_buffer[i]))
 783                         return -EFAULT;
 784                 switch (c) {
 785                 case '\"':
 786                 case '\n':
 787                 case '\r':
 788                 case '\t':
 789                 case ' ':
 790                         goto done_str;
 791                         break;
 792                 default:
 793                         break;
 794                 }
 795         }
 796 done_str:
 797         return i;
 798 }
 799
 800 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
 801 {
 802         unsigned n = 0;
 803         char c;
 804         ssize_t i = 0;
 805         int len;
 806
 807         pkt_dev->nr_labels = 0;
 808         do {
 809                 __u32 tmp;
 810                 len = hex32_arg(&buffer[i], 8, &tmp);
 811                 if (len <= 0)
 812                         return len;
 813                 pkt_dev->labels[n] = htonl(tmp);
 814                 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
 815                         pkt_dev->flags |= F_MPLS_RND;
 816                 i += len;
 817                 if (get_user(c, &buffer[i]))
 818                         return -EFAULT;
 819                 i++;
 820                 n++;
 821                 if (n >= MAX_MPLS_LABELS)
 822                         return -E2BIG;
 823         } while (c == ',');
 824
 825         pkt_dev->nr_labels = n;
 826         return i;
 827 }
 828
 829 static ssize_t pktgen_if_write(struct file *file,
 830                                const char __user * user_buffer, size_t count,
 831                                loff_t * offset)
 832 {
 833         struct seq_file *seq = (struct seq_file *)file->private_data;
 834         struct pktgen_dev *pkt_dev = seq->private;
 835         int i = 0, max, len;
 836         char name[16], valstr[32];
 837         unsigned long value = 0;
 838         char *pg_result = NULL;
 839         int tmp = 0;
 840         char buf[128];
 841
 842         pg_result = &(pkt_dev->result[0]);
 843
 844         if (count < 1) {
 845                 printk(KERN_WARNING "pktgen: wrong command format\n");
 846                 return -EINVAL;
 847         }
 848
 849         max = count - i;
 850         tmp = count_trail_chars(&user_buffer[i], max);
 851         if (tmp < 0) {
 852                 printk(KERN_WARNING "pktgen: illegal format\n");
 853                 return tmp;
 854         }
 855         i += tmp;
 856
 857         /* Read variable name */
 858
 859         len = strn_len(&user_buffer[i], sizeof(name) - 1);
 860         if (len < 0)
 861                 return len;
 862
 863         memset(name, 0, sizeof(name));
 864         if (copy_from_user(name, &user_buffer[i], len))
 865                 return -EFAULT;
 866         i += len;
 867
 868         max = count - i;
 869         len = count_trail_chars(&user_buffer[i], max);
 870         if (len < 0)
 871                 return len;
 872
 873         i += len;
 874
 875         if (debug) {
 876                 char tb[count + 1];
 877                 if (copy_from_user(tb, user_buffer, count))
 878                         return -EFAULT;
 879                 tb[count] = 0;
 880                 printk(KERN_DEBUG "pktgen: %s,%lu  buffer -:%s:-\n", name,
 881                        (unsigned long)count, tb);
 882         }
 883
 884         if (!strcmp(name, "min_pkt_size")) {
 885                 len = num_arg(&user_buffer[i], 10, &value);
 886                 if (len < 0)
 887                         return len;
 888
 889                 i += len;
 890                 if (value < 14 + 20 + 8)
 891                         value = 14 + 20 + 8;
 892                 if (value != pkt_dev->min_pkt_size) {
 893                         pkt_dev->min_pkt_size = value;
 894                         pkt_dev->cur_pkt_size = value;
 895                 }
 896                 sprintf(pg_result, "OK: min_pkt_size=%u",
 897                         pkt_dev->min_pkt_size);
 898                 return count;
 899         }
 900
 901         if (!strcmp(name, "max_pkt_size")) {
 902                 len = num_arg(&user_buffer[i], 10, &value);
 903                 if (len < 0)
 904                         return len;
 905
 906                 i += len;
 907                 if (value < 14 + 20 + 8)
 908                         value = 14 + 20 + 8;
 909                 if (value != pkt_dev->max_pkt_size) {
 910                         pkt_dev->max_pkt_size = value;
 911                         pkt_dev->cur_pkt_size = value;
 912                 }
 913                 sprintf(pg_result, "OK: max_pkt_size=%u",
 914                         pkt_dev->max_pkt_size);
 915                 return count;
 916         }
 917
 918         /* Shortcut for min = max */
 919
 920         if (!strcmp(name, "pkt_size")) {
 921                 len = num_arg(&user_buffer[i], 10, &value);
 922                 if (len < 0)
 923                         return len;
 924
 925                 i += len;
 926                 if (value < 14 + 20 + 8)
 927                         value = 14 + 20 + 8;
 928                 if (value != pkt_dev->min_pkt_size) {
 929                         pkt_dev->min_pkt_size = value;
 930                         pkt_dev->max_pkt_size = value;
 931                         pkt_dev->cur_pkt_size = value;
 932                 }
 933                 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
 934                 return count;
 935         }
 936
 937         if (!strcmp(name, "debug")) {
 938                 len = num_arg(&user_buffer[i], 10, &value);
 939                 if (len < 0)
 940                         return len;
 941
 942                 i += len;
 943                 debug = value;
 944                 sprintf(pg_result, "OK: debug=%u", debug);
 945                 return count;
 946         }
 947
 948         if (!strcmp(name, "frags")) {
 949                 len = num_arg(&user_buffer[i], 10, &value);
 950                 if (len < 0)
 951                         return len;
 952
 953                 i += len;
 954                 pkt_dev->nfrags = value;
 955                 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
 956                 return count;
 957         }
 958         if (!strcmp(name, "delay")) {
 959                 len = num_arg(&user_buffer[i], 10, &value);
 960                 if (len < 0)
 961                         return len;
 962
 963                 i += len;
 964                 if (value == 0x7FFFFFFF)
 965                         pkt_dev->delay = ULLONG_MAX;
 966                 else
 967                         pkt_dev->delay = (u64)value;
 968
 969                 sprintf(pg_result, "OK: delay=%llu",
 970                         (unsigned long long) pkt_dev->delay);
 971                 return count;
 972         }
 973         if (!strcmp(name, "udp_src_min")) {
 974                 len = num_arg(&user_buffer[i], 10, &value);
 975                 if (len < 0)
 976                         return len;
 977
 978                 i += len;
 979                 if (value != pkt_dev->udp_src_min) {
 980                         pkt_dev->udp_src_min = value;
 981                         pkt_dev->cur_udp_src = value;
 982                 }
 983                 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
 984                 return count;
 985         }
 986         if (!strcmp(name, "udp_dst_min")) {
 987                 len = num_arg(&user_buffer[i], 10, &value);
 988                 if (len < 0)
 989                         return len;
 990
 991                 i += len;
 992                 if (value != pkt_dev->udp_dst_min) {
 993                         pkt_dev->udp_dst_min = value;
 994                         pkt_dev->cur_udp_dst = value;
 995                 }
 996                 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
 997                 return count;
 998         }
 999         if (!strcmp(name, "udp_src_max")) {
1000                 len = num_arg(&user_buffer[i], 10, &value);
1001                 if (len < 0)
1002                         return len;
1003
1004                 i += len;
1005                 if (value != pkt_dev->udp_src_max) {
1006                         pkt_dev->udp_src_max = value;
1007                         pkt_dev->cur_udp_src = value;
1008                 }
1009                 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1010                 return count;
1011         }
1012         if (!strcmp(name, "udp_dst_max")) {
1013                 len = num_arg(&user_buffer[i], 10, &value);
1014                 if (len < 0)
1015                         return len;
1016
1017                 i += len;
1018                 if (value != pkt_dev->udp_dst_max) {
1019                         pkt_dev->udp_dst_max = value;
1020                         pkt_dev->cur_udp_dst = value;
1021                 }
1022                 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1023                 return count;
1024         }
1025         if (!strcmp(name, "clone_skb")) {
1026                 len = num_arg(&user_buffer[i], 10, &value);
1027                 if (len < 0)
1028                         return len;
1029
1030                 i += len;
1031                 pkt_dev->clone_skb = value;
1032
1033                 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1034                 return count;
1035         }
1036         if (!strcmp(name, "count")) {
1037                 len = num_arg(&user_buffer[i], 10, &value);
1038                 if (len < 0)
1039                         return len;
1040
1041                 i += len;
1042                 pkt_dev->count = value;
1043                 sprintf(pg_result, "OK: count=%llu",
1044                         (unsigned long long)pkt_dev->count);
1045                 return count;
1046         }
1047         if (!strcmp(name, "src_mac_count")) {
1048                 len = num_arg(&user_buffer[i], 10, &value);
1049                 if (len < 0)
1050                         return len;
1051
1052                 i += len;
1053                 if (pkt_dev->src_mac_count != value) {
1054                         pkt_dev->src_mac_count = value;
1055                         pkt_dev->cur_src_mac_offset = 0;
1056                 }
1057                 sprintf(pg_result, "OK: src_mac_count=%d",
1058                         pkt_dev->src_mac_count);
1059                 return count;
1060         }
1061         if (!strcmp(name, "dst_mac_count")) {
1062                 len = num_arg(&user_buffer[i], 10, &value);
1063                 if (len < 0)
1064                         return len;
1065
1066                 i += len;
1067                 if (pkt_dev->dst_mac_count != value) {
1068                         pkt_dev->dst_mac_count = value;
1069                         pkt_dev->cur_dst_mac_offset = 0;
1070                 }
1071                 sprintf(pg_result, "OK: dst_mac_count=%d",
1072                         pkt_dev->dst_mac_count);
1073                 return count;
1074         }
1075         if (!strcmp(name, "flag")) {
1076                 char f[32];
1077                 memset(f, 0, 32);
1078                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1079                 if (len < 0)
1080                         return len;
1081
1082                 if (copy_from_user(f, &user_buffer[i], len))
1083                         return -EFAULT;
1084                 i += len;
1085                 if (strcmp(f, "IPSRC_RND") == 0)
1086                         pkt_dev->flags |= F_IPSRC_RND;
1087
1088                 else if (strcmp(f, "!IPSRC_RND") == 0)
1089                         pkt_dev->flags &= ~F_IPSRC_RND;
1090
1091                 else if (strcmp(f, "TXSIZE_RND") == 0)
1092                         pkt_dev->flags |= F_TXSIZE_RND;
1093
1094                 else if (strcmp(f, "!TXSIZE_RND") == 0)
1095                         pkt_dev->flags &= ~F_TXSIZE_RND;
1096
1097                 else if (strcmp(f, "IPDST_RND") == 0)
1098                         pkt_dev->flags |= F_IPDST_RND;
1099
1100                 else if (strcmp(f, "!IPDST_RND") == 0)
1101                         pkt_dev->flags &= ~F_IPDST_RND;
1102
1103                 else if (strcmp(f, "UDPSRC_RND") == 0)
1104                         pkt_dev->flags |= F_UDPSRC_RND;
1105
1106                 else if (strcmp(f, "!UDPSRC_RND") == 0)
1107                         pkt_dev->flags &= ~F_UDPSRC_RND;
1108
1109                 else if (strcmp(f, "UDPDST_RND") == 0)
1110                         pkt_dev->flags |= F_UDPDST_RND;
1111
1112                 else if (strcmp(f, "!UDPDST_RND") == 0)
1113                         pkt_dev->flags &= ~F_UDPDST_RND;
1114
1115                 else if (strcmp(f, "MACSRC_RND") == 0)
1116                         pkt_dev->flags |= F_MACSRC_RND;
1117
1118                 else if (strcmp(f, "!MACSRC_RND") == 0)
1119                         pkt_dev->flags &= ~F_MACSRC_RND;
1120
1121                 else if (strcmp(f, "MACDST_RND") == 0)
1122                         pkt_dev->flags |= F_MACDST_RND;
1123
1124                 else if (strcmp(f, "!MACDST_RND") == 0)
1125                         pkt_dev->flags &= ~F_MACDST_RND;
1126
1127                 else if (strcmp(f, "MPLS_RND") == 0)
1128                         pkt_dev->flags |= F_MPLS_RND;
1129
1130                 else if (strcmp(f, "!MPLS_RND") == 0)
1131                         pkt_dev->flags &= ~F_MPLS_RND;
1132
1133                 else if (strcmp(f, "VID_RND") == 0)
1134                         pkt_dev->flags |= F_VID_RND;
1135
1136                 else if (strcmp(f, "!VID_RND") == 0)
1137                         pkt_dev->flags &= ~F_VID_RND;
1138
1139                 else if (strcmp(f, "SVID_RND") == 0)
1140                         pkt_dev->flags |= F_SVID_RND;
1141
1142                 else if (strcmp(f, "!SVID_RND") == 0)
1143                         pkt_dev->flags &= ~F_SVID_RND;
1144
1145                 else if (strcmp(f, "FLOW_SEQ") == 0)
1146                         pkt_dev->flags |= F_FLOW_SEQ;
1147
1148                 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1149                         pkt_dev->flags |= F_QUEUE_MAP_RND;
1150
1151                 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1152                         pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1153
1154                 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1155                         pkt_dev->flags |= F_QUEUE_MAP_CPU;
1156
1157                 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1158                         pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1159 #ifdef CONFIG_XFRM
1160                 else if (strcmp(f, "IPSEC") == 0)
1161                         pkt_dev->flags |= F_IPSEC_ON;
1162 #endif
1163
1164                 else if (strcmp(f, "!IPV6") == 0)
1165                         pkt_dev->flags &= ~F_IPV6;
1166
1167                 else {
1168                         sprintf(pg_result,
1169                                 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1170                                 f,
1171                                 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1172                                 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1173                         return count;
1174                 }
1175                 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1176                 return count;
1177         }
1178         if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1179                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1180                 if (len < 0)
1181                         return len;
1182
1183                 if (copy_from_user(buf, &user_buffer[i], len))
1184                         return -EFAULT;
1185                 buf[len] = 0;
1186                 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1187                         memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1188                         strncpy(pkt_dev->dst_min, buf, len);
1189                         pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1190                         pkt_dev->cur_daddr = pkt_dev->daddr_min;
1191                 }
1192                 if (debug)
1193                         printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1194                                pkt_dev->dst_min);
1195                 i += len;
1196                 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1197                 return count;
1198         }
1199         if (!strcmp(name, "dst_max")) {
1200                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1201                 if (len < 0)
1202                         return len;
1203
1204
1205                 if (copy_from_user(buf, &user_buffer[i], len))
1206                         return -EFAULT;
1207
1208                 buf[len] = 0;
1209                 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1210                         memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1211                         strncpy(pkt_dev->dst_max, buf, len);
1212                         pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1213                         pkt_dev->cur_daddr = pkt_dev->daddr_max;
1214                 }
1215                 if (debug)
1216                         printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1217                                pkt_dev->dst_max);
1218                 i += len;
1219                 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1220                 return count;
1221         }
1222         if (!strcmp(name, "dst6")) {
1223                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1224                 if (len < 0)
1225                         return len;
1226
1227                 pkt_dev->flags |= F_IPV6;
1228
1229                 if (copy_from_user(buf, &user_buffer[i], len))
1230                         return -EFAULT;
1231                 buf[len] = 0;
1232
1233                 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1234                 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1235
1236                 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1237
1238                 if (debug)
1239                         printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1240
1241                 i += len;
1242                 sprintf(pg_result, "OK: dst6=%s", buf);
1243                 return count;
1244         }
1245         if (!strcmp(name, "dst6_min")) {
1246                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1247                 if (len < 0)
1248                         return len;
1249
1250                 pkt_dev->flags |= F_IPV6;
1251
1252                 if (copy_from_user(buf, &user_buffer[i], len))
1253                         return -EFAULT;
1254                 buf[len] = 0;
1255
1256                 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1257                 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1258
1259                 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1260                                &pkt_dev->min_in6_daddr);
1261                 if (debug)
1262                         printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1263
1264                 i += len;
1265                 sprintf(pg_result, "OK: dst6_min=%s", buf);
1266                 return count;
1267         }
1268         if (!strcmp(name, "dst6_max")) {
1269                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1270                 if (len < 0)
1271                         return len;
1272
1273                 pkt_dev->flags |= F_IPV6;
1274
1275                 if (copy_from_user(buf, &user_buffer[i], len))
1276                         return -EFAULT;
1277                 buf[len] = 0;
1278
1279                 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1280                 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1281
1282                 if (debug)
1283                         printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1284
1285                 i += len;
1286                 sprintf(pg_result, "OK: dst6_max=%s", buf);
1287                 return count;
1288         }
1289         if (!strcmp(name, "src6")) {
1290                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1291                 if (len < 0)
1292                         return len;
1293
1294                 pkt_dev->flags |= F_IPV6;
1295
1296                 if (copy_from_user(buf, &user_buffer[i], len))
1297                         return -EFAULT;
1298                 buf[len] = 0;
1299
1300                 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1301                 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1302
1303                 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1304
1305                 if (debug)
1306                         printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1307
1308                 i += len;
1309                 sprintf(pg_result, "OK: src6=%s", buf);
1310                 return count;
1311         }
1312         if (!strcmp(name, "src_min")) {
1313                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1314                 if (len < 0)
1315                         return len;
1316
1317                 if (copy_from_user(buf, &user_buffer[i], len))
1318                         return -EFAULT;
1319                 buf[len] = 0;
1320                 if (strcmp(buf, pkt_dev->src_min) != 0) {
1321                         memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1322                         strncpy(pkt_dev->src_min, buf, len);
1323                         pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1324                         pkt_dev->cur_saddr = pkt_dev->saddr_min;
1325                 }
1326                 if (debug)
1327                         printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1328                                pkt_dev->src_min);
1329                 i += len;
1330                 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1331                 return count;
1332         }
1333         if (!strcmp(name, "src_max")) {
1334                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1335                 if (len < 0)
1336                         return len;
1337
1338                 if (copy_from_user(buf, &user_buffer[i], len))
1339                         return -EFAULT;
1340                 buf[len] = 0;
1341                 if (strcmp(buf, pkt_dev->src_max) != 0) {
1342                         memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1343                         strncpy(pkt_dev->src_max, buf, len);
1344                         pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1345                         pkt_dev->cur_saddr = pkt_dev->saddr_max;
1346                 }
1347                 if (debug)
1348                         printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1349                                pkt_dev->src_max);
1350                 i += len;
1351                 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1352                 return count;
1353         }
1354         if (!strcmp(name, "dst_mac")) {
1355                 char *v = valstr;
1356                 unsigned char old_dmac[ETH_ALEN];
1357                 unsigned char *m = pkt_dev->dst_mac;
1358                 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1359
1360                 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1361                 if (len < 0)
1362                         return len;
1363
1364                 memset(valstr, 0, sizeof(valstr));
1365                 if (copy_from_user(valstr, &user_buffer[i], len))
1366                         return -EFAULT;
1367                 i += len;
1368
1369                 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1370                         if (*v >= '0' && *v <= '9') {
1371                                 *m *= 16;
1372                                 *m += *v - '0';
1373                         }
1374                         if (*v >= 'A' && *v <= 'F') {
1375                                 *m *= 16;
1376                                 *m += *v - 'A' + 10;
1377                         }
1378                         if (*v >= 'a' && *v <= 'f') {
1379                                 *m *= 16;
1380                                 *m += *v - 'a' + 10;
1381                         }
1382                         if (*v == ':') {
1383                                 m++;
1384                                 *m = 0;
1385                         }
1386                 }
1387
1388                 /* Set up Dest MAC */
1389                 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1390                         memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1391
1392                 sprintf(pg_result, "OK: dstmac");
1393                 return count;
1394         }
1395         if (!strcmp(name, "src_mac")) {
1396                 char *v = valstr;
1397                 unsigned char old_smac[ETH_ALEN];
1398                 unsigned char *m = pkt_dev->src_mac;
1399
1400                 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1401
1402                 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1403                 if (len < 0)
1404                         return len;
1405
1406                 memset(valstr, 0, sizeof(valstr));
1407                 if (copy_from_user(valstr, &user_buffer[i], len))
1408                         return -EFAULT;
1409                 i += len;
1410
1411                 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1412                         if (*v >= '0' && *v <= '9') {
1413                                 *m *= 16;
1414                                 *m += *v - '0';
1415                         }
1416                         if (*v >= 'A' && *v <= 'F') {
1417                                 *m *= 16;
1418                                 *m += *v - 'A' + 10;
1419                         }
1420                         if (*v >= 'a' && *v <= 'f') {
1421                                 *m *= 16;
1422                                 *m += *v - 'a' + 10;
1423                         }
1424                         if (*v == ':') {
1425                                 m++;
1426                                 *m = 0;
1427                         }
1428                 }
1429
1430                 /* Set up Src MAC */
1431                 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1432                         memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1433
1434                 sprintf(pg_result, "OK: srcmac");
1435                 return count;
1436         }
1437
1438         if (!strcmp(name, "clear_counters")) {
1439                 pktgen_clear_counters(pkt_dev);
1440                 sprintf(pg_result, "OK: Clearing counters.\n");
1441                 return count;
1442         }
1443
1444         if (!strcmp(name, "flows")) {
1445                 len = num_arg(&user_buffer[i], 10, &value);
1446                 if (len < 0)
1447                         return len;
1448
1449                 i += len;
1450                 if (value > MAX_CFLOWS)
1451                         value = MAX_CFLOWS;
1452
1453                 pkt_dev->cflows = value;
1454                 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1455                 return count;
1456         }
1457
1458         if (!strcmp(name, "flowlen")) {
1459                 len = num_arg(&user_buffer[i], 10, &value);
1460                 if (len < 0)
1461                         return len;
1462
1463                 i += len;
1464                 pkt_dev->lflow = value;
1465                 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1466                 return count;
1467         }
1468
1469         if (!strcmp(name, "queue_map_min")) {
1470                 len = num_arg(&user_buffer[i], 5, &value);
1471                 if (len < 0)
1472                         return len;
1473
1474                 i += len;
1475                 pkt_dev->queue_map_min = value;
1476                 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1477                 return count;
1478         }
1479
1480         if (!strcmp(name, "queue_map_max")) {
1481                 len = num_arg(&user_buffer[i], 5, &value);
1482                 if (len < 0)
1483                         return len;
1484
1485                 i += len;
1486                 pkt_dev->queue_map_max = value;
1487                 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1488                 return count;
1489         }
1490
1491         if (!strcmp(name, "mpls")) {
1492                 unsigned n, cnt;
1493
1494                 len = get_labels(&user_buffer[i], pkt_dev);
1495                 if (len < 0)
1496                         return len;
1497                 i += len;
1498                 cnt = sprintf(pg_result, "OK: mpls=");
1499                 for (n = 0; n < pkt_dev->nr_labels; n++)
1500                         cnt += sprintf(pg_result + cnt,
1501                                        "%08x%s", ntohl(pkt_dev->labels[n]),
1502                                        n == pkt_dev->nr_labels-1 ? "" : ",");
1503
1504                 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1505                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1506                         pkt_dev->svlan_id = 0xffff;
1507
1508                         if (debug)
1509                                 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1510                 }
1511                 return count;
1512         }
1513
1514         if (!strcmp(name, "vlan_id")) {
1515                 len = num_arg(&user_buffer[i], 4, &value);
1516                 if (len < 0)
1517                         return len;
1518
1519                 i += len;
1520                 if (value <= 4095) {
1521                         pkt_dev->vlan_id = value;  /* turn on VLAN */
1522
1523                         if (debug)
1524                                 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1525
1526                         if (debug && pkt_dev->nr_labels)
1527                                 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1528
1529                         pkt_dev->nr_labels = 0;    /* turn off MPLS */
1530                         sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1531                 } else {
1532                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1533                         pkt_dev->svlan_id = 0xffff;
1534
1535                         if (debug)
1536                                 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1537                 }
1538                 return count;
1539         }
1540
1541         if (!strcmp(name, "vlan_p")) {
1542                 len = num_arg(&user_buffer[i], 1, &value);
1543                 if (len < 0)
1544                         return len;
1545
1546                 i += len;
1547                 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1548                         pkt_dev->vlan_p = value;
1549                         sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1550                 } else {
1551                         sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1552                 }
1553                 return count;
1554         }
1555
1556         if (!strcmp(name, "vlan_cfi")) {
1557                 len = num_arg(&user_buffer[i], 1, &value);
1558                 if (len < 0)
1559                         return len;
1560
1561                 i += len;
1562                 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1563                         pkt_dev->vlan_cfi = value;
1564                         sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1565                 } else {
1566                         sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1567                 }
1568                 return count;
1569         }
1570
1571         if (!strcmp(name, "svlan_id")) {
1572                 len = num_arg(&user_buffer[i], 4, &value);
1573                 if (len < 0)
1574                         return len;
1575
1576                 i += len;
1577                 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1578                         pkt_dev->svlan_id = value;  /* turn on SVLAN */
1579
1580                         if (debug)
1581                                 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1582
1583                         if (debug && pkt_dev->nr_labels)
1584                                 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1585
1586                         pkt_dev->nr_labels = 0;    /* turn off MPLS */
1587                         sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1588                 } else {
1589                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1590                         pkt_dev->svlan_id = 0xffff;
1591
1592                         if (debug)
1593                                 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1594                 }
1595                 return count;
1596         }
1597
1598         if (!strcmp(name, "svlan_p")) {
1599                 len = num_arg(&user_buffer[i], 1, &value);
1600                 if (len < 0)
1601                         return len;
1602
1603                 i += len;
1604                 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1605                         pkt_dev->svlan_p = value;
1606                         sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1607                 } else {
1608                         sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1609                 }
1610                 return count;
1611         }
1612
1613         if (!strcmp(name, "svlan_cfi")) {
1614                 len = num_arg(&user_buffer[i], 1, &value);
1615                 if (len < 0)
1616                         return len;
1617
1618                 i += len;
1619                 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1620                         pkt_dev->svlan_cfi = value;
1621                         sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1622                 } else {
1623                         sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1624                 }
1625                 return count;
1626         }
1627
1628         if (!strcmp(name, "tos")) {
1629                 __u32 tmp_value = 0;
1630                 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1631                 if (len < 0)
1632                         return len;
1633
1634                 i += len;
1635                 if (len == 2) {
1636                         pkt_dev->tos = tmp_value;
1637                         sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1638                 } else {
1639                         sprintf(pg_result, "ERROR: tos must be 00-ff");
1640                 }
1641                 return count;
1642         }
1643
1644         if (!strcmp(name, "traffic_class")) {
1645                 __u32 tmp_value = 0;
1646                 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1647                 if (len < 0)
1648                         return len;
1649
1650                 i += len;
1651                 if (len == 2) {
1652                         pkt_dev->traffic_class = tmp_value;
1653                         sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1654                 } else {
1655                         sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1656                 }
1657                 return count;
1658         }
1659
1660         sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1661         return -EINVAL;
1662 }
1663
1664 static int pktgen_if_open(struct inode *inode, struct file *file)
1665 {
1666         return single_open(file, pktgen_if_show, PDE(inode)->data);
1667 }
1668
1669 static const struct file_operations pktgen_if_fops = {
1670         .owner   = THIS_MODULE,
1671         .open    = pktgen_if_open,
1672         .read    = seq_read,
1673         .llseek  = seq_lseek,
1674         .write   = pktgen_if_write,
1675         .release = single_release,
1676 };
1677
1678 static int pktgen_thread_show(struct seq_file *seq, void *v)
1679 {
1680         struct pktgen_thread *t = seq->private;
1681         const struct pktgen_dev *pkt_dev;
1682
1683         BUG_ON(!t);
1684
1685         seq_printf(seq, "Running: ");
1686
1687         if_lock(t);
1688         list_for_each_entry(pkt_dev, &t->if_list, list)
1689                 if (pkt_dev->running)
1690                         seq_printf(seq, "%s ", pkt_dev->odev->name);
1691
1692         seq_printf(seq, "\nStopped: ");
1693
1694         list_for_each_entry(pkt_dev, &t->if_list, list)
1695                 if (!pkt_dev->running)
1696                         seq_printf(seq, "%s ", pkt_dev->odev->name);
1697
1698         if (t->result[0])
1699                 seq_printf(seq, "\nResult: %s\n", t->result);
1700         else
1701                 seq_printf(seq, "\nResult: NA\n");
1702
1703         if_unlock(t);
1704
1705         return 0;
1706 }
1707
1708 static ssize_t pktgen_thread_write(struct file *file,
1709                                    const char __user * user_buffer,
1710                                    size_t count, loff_t * offset)
1711 {
1712         struct seq_file *seq = (struct seq_file *)file->private_data;
1713         struct pktgen_thread *t = seq->private;
1714         int i = 0, max, len, ret;
1715         char name[40];
1716         char *pg_result;
1717
1718         if (count < 1) {
1719                 //      sprintf(pg_result, "Wrong command format");
1720                 return -EINVAL;
1721         }
1722
1723         max = count - i;
1724         len = count_trail_chars(&user_buffer[i], max);
1725         if (len < 0)
1726                 return len;
1727
1728         i += len;
1729
1730         /* Read variable name */
1731
1732         len = strn_len(&user_buffer[i], sizeof(name) - 1);
1733         if (len < 0)
1734                 return len;
1735
1736         memset(name, 0, sizeof(name));
1737         if (copy_from_user(name, &user_buffer[i], len))
1738                 return -EFAULT;
1739         i += len;
1740
1741         max = count - i;
1742         len = count_trail_chars(&user_buffer[i], max);
1743         if (len < 0)
1744                 return len;
1745
1746         i += len;
1747
1748         if (debug)
1749                 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1750                        name, (unsigned long)count);
1751
1752         if (!t) {
1753                 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1754                 ret = -EINVAL;
1755                 goto out;
1756         }
1757
1758         pg_result = &(t->result[0]);
1759
1760         if (!strcmp(name, "add_device")) {
1761                 char f[32];
1762                 memset(f, 0, 32);
1763                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1764                 if (len < 0) {
1765                         ret = len;
1766                         goto out;
1767                 }
1768                 if (copy_from_user(f, &user_buffer[i], len))
1769                         return -EFAULT;
1770                 i += len;
1771                 mutex_lock(&pktgen_thread_lock);
1772                 pktgen_add_device(t, f);
1773                 mutex_unlock(&pktgen_thread_lock);
1774                 ret = count;
1775                 sprintf(pg_result, "OK: add_device=%s", f);
1776                 goto out;
1777         }
1778
1779         if (!strcmp(name, "rem_device_all")) {
1780                 mutex_lock(&pktgen_thread_lock);
1781                 t->control |= T_REMDEVALL;
1782                 mutex_unlock(&pktgen_thread_lock);
1783                 schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1784                 ret = count;
1785                 sprintf(pg_result, "OK: rem_device_all");
1786                 goto out;
1787         }
1788
1789         if (!strcmp(name, "max_before_softirq")) {
1790                 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1791                 ret = count;
1792                 goto out;
1793         }
1794
1795         ret = -EINVAL;
1796 out:
1797         return ret;
1798 }
1799
1800 static int pktgen_thread_open(struct inode *inode, struct file *file)
1801 {
1802         return single_open(file, pktgen_thread_show, PDE(inode)->data);
1803 }
1804
1805 static const struct file_operations pktgen_thread_fops = {
1806         .owner   = THIS_MODULE,
1807         .open    = pktgen_thread_open,
1808         .read    = seq_read,
1809         .llseek  = seq_lseek,
1810         .write   = pktgen_thread_write,
1811         .release = single_release,
1812 };
1813
1814 /* Think find or remove for NN */
1815 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1816 {
1817         struct pktgen_thread *t;
1818         struct pktgen_dev *pkt_dev = NULL;
1819
1820         list_for_each_entry(t, &pktgen_threads, th_list) {
1821                 pkt_dev = pktgen_find_dev(t, ifname);
1822                 if (pkt_dev) {
1823                         if (remove) {
1824                                 if_lock(t);
1825                                 pkt_dev->removal_mark = 1;
1826                                 t->control |= T_REMDEV;
1827                                 if_unlock(t);
1828                         }
1829                         break;
1830                 }
1831         }
1832         return pkt_dev;
1833 }
1834
1835 /*
1836  * mark a device for removal
1837  */
1838 static void pktgen_mark_device(const char *ifname)
1839 {
1840         struct pktgen_dev *pkt_dev = NULL;
1841         const int max_tries = 10, msec_per_try = 125;
1842         int i = 0;
1843
1844         mutex_lock(&pktgen_thread_lock);
1845         pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1846
1847         while (1) {
1848
1849                 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1850                 if (pkt_dev == NULL)
1851                         break;  /* success */
1852
1853                 mutex_unlock(&pktgen_thread_lock);
1854                 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1855                                 "to disappear....\n", ifname);
1856                 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1857                 mutex_lock(&pktgen_thread_lock);
1858
1859                 if (++i >= max_tries) {
1860                         printk(KERN_ERR "pktgen_mark_device: timed out after "
1861                                "waiting %d msec for device %s to be removed\n",
1862                                msec_per_try * i, ifname);
1863                         break;
1864                 }
1865
1866         }
1867
1868         mutex_unlock(&pktgen_thread_lock);
1869 }
1870
1871 static void pktgen_change_name(struct net_device *dev)
1872 {
1873         struct pktgen_thread *t;
1874
1875         list_for_each_entry(t, &pktgen_threads, th_list) {
1876                 struct pktgen_dev *pkt_dev;
1877
1878                 list_for_each_entry(pkt_dev, &t->if_list, list) {
1879                         if (pkt_dev->odev != dev)
1880                                 continue;
1881
1882                         remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1883
1884                         pkt_dev->entry = proc_create_data(dev->name, 0600,
1885                                                           pg_proc_dir,
1886                                                           &pktgen_if_fops,
1887                                                           pkt_dev);
1888                         if (!pkt_dev->entry)
1889                                 printk(KERN_ERR "pktgen: can't move proc "
1890                                        " entry for '%s'\n", dev->name);
1891                         break;
1892                 }
1893         }
1894 }
1895
1896 static int pktgen_device_event(struct notifier_block *unused,
1897                                unsigned long event, void *ptr)
1898 {
1899         struct net_device *dev = ptr;
1900
1901         if (!net_eq(dev_net(dev), &init_net))
1902                 return NOTIFY_DONE;
1903
1904         /* It is OK that we do not hold the group lock right now,
1905          * as we run under the RTNL lock.
1906          */
1907
1908         switch (event) {
1909         case NETDEV_CHANGENAME:
1910                 pktgen_change_name(dev);
1911                 break;
1912
1913         case NETDEV_UNREGISTER:
1914                 pktgen_mark_device(dev->name);
1915                 break;
1916         }
1917
1918         return NOTIFY_DONE;
1919 }
1920
1921 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1922                                                  const char *ifname)
1923 {
1924         char b[IFNAMSIZ+5];
1925         int i = 0;
1926
1927         for (i = 0; ifname[i] != '@'; i++) {
1928                 if (i == IFNAMSIZ)
1929                         break;
1930
1931                 b[i] = ifname[i];
1932         }
1933         b[i] = 0;
1934
1935         return dev_get_by_name(&init_net, b);
1936 }
1937
1938
1939 /* Associate pktgen_dev with a device. */
1940
1941 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1942 {
1943         struct net_device *odev;
1944         int err;
1945
1946         /* Clean old setups */
1947         if (pkt_dev->odev) {
1948                 dev_put(pkt_dev->odev);
1949                 pkt_dev->odev = NULL;
1950         }
1951
1952         odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1953         if (!odev) {
1954                 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1955                 return -ENODEV;
1956         }
1957
1958         if (odev->type != ARPHRD_ETHER) {
1959                 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1960                 err = -EINVAL;
1961         } else if (!netif_running(odev)) {
1962                 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1963                 err = -ENETDOWN;
1964         } else {
1965                 pkt_dev->odev = odev;
1966                 return 0;
1967         }
1968
1969         dev_put(odev);
1970         return err;
1971 }
1972
1973 /* Read pkt_dev from the interface and set up internal pktgen_dev
1974  * structure to have the right information to create/send packets
1975  */
1976 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1977 {
1978         int ntxq;
1979
1980         if (!pkt_dev->odev) {
1981                 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1982                        "setup_inject.\n");
1983                 sprintf(pkt_dev->result,
1984                         "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1985                 return;
1986         }
1987
1988         /* make sure that we don't pick a non-existing transmit queue */
1989         ntxq = pkt_dev->odev->real_num_tx_queues;
1990
1991         if (ntxq <= pkt_dev->queue_map_min) {
1992                 printk(KERN_WARNING "pktgen: WARNING: Requested "
1993                        "queue_map_min (zero-based) (%d) exceeds valid range "
1994                        "[0 - %d] for (%d) queues on %s, resetting\n",
1995                        pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1996                        pkt_dev->odev->name);
1997                 pkt_dev->queue_map_min = ntxq - 1;
1998         }
1999         if (pkt_dev->queue_map_max >= ntxq) {
2000                 printk(KERN_WARNING "pktgen: WARNING: Requested "
2001                        "queue_map_max (zero-based) (%d) exceeds valid range "
2002                        "[0 - %d] for (%d) queues on %s, resetting\n",
2003                        pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2004                        pkt_dev->odev->name);
2005                 pkt_dev->queue_map_max = ntxq - 1;
2006         }
2007
2008         /* Default to the interface's mac if not explicitly set. */
2009
2010         if (is_zero_ether_addr(pkt_dev->src_mac))
2011                 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2012
2013         /* Set up Dest MAC */
2014         memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2015
2016         /* Set up pkt size */
2017         pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2018
2019         if (pkt_dev->flags & F_IPV6) {
2020                 /*
2021                  * Skip this automatic address setting until locks or functions
2022                  * gets exported
2023                  */
2024
2025 #ifdef NOTNOW
2026                 int i, set = 0, err = 1;
2027                 struct inet6_dev *idev;
2028
2029                 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2030                         if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2031                                 set = 1;
2032                                 break;
2033                         }
2034
2035                 if (!set) {
2036
2037                         /*
2038                          * Use linklevel address if unconfigured.
2039                          *
2040                          * use ipv6_get_lladdr if/when it's get exported
2041                          */
2042
2043                         rcu_read_lock();
2044                         idev = __in6_dev_get(pkt_dev->odev);
2045                         if (idev) {
2046                                 struct inet6_ifaddr *ifp;
2047
2048                                 read_lock_bh(&idev->lock);
2049                                 for (ifp = idev->addr_list; ifp;
2050                                      ifp = ifp->if_next) {
2051                                         if (ifp->scope == IFA_LINK
2052                                             && !(ifp->
2053                                                  flags & IFA_F_TENTATIVE)) {
2054                                                 ipv6_addr_copy(&pkt_dev->
2055                                                                cur_in6_saddr,
2056                                                                &ifp->addr);
2057                                                 err = 0;
2058                                                 break;
2059                                         }
2060                                 }
2061                                 read_unlock_bh(&idev->lock);
2062                         }
2063                         rcu_read_unlock();
2064                         if (err)
2065                                 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2066                                        "address not availble.\n");
2067                 }
2068 #endif
2069         } else {
2070                 pkt_dev->saddr_min = 0;
2071                 pkt_dev->saddr_max = 0;
2072                 if (strlen(pkt_dev->src_min) == 0) {
2073
2074                         struct in_device *in_dev;
2075
2076                         rcu_read_lock();
2077                         in_dev = __in_dev_get_rcu(pkt_dev->odev);
2078                         if (in_dev) {
2079                                 if (in_dev->ifa_list) {
2080                                         pkt_dev->saddr_min =
2081                                             in_dev->ifa_list->ifa_address;
2082                                         pkt_dev->saddr_max = pkt_dev->saddr_min;
2083                                 }
2084                         }
2085                         rcu_read_unlock();
2086                 } else {
2087                         pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2088                         pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2089                 }
2090
2091                 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2092                 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2093         }
2094         /* Initialize current values. */
2095         pkt_dev->cur_dst_mac_offset = 0;
2096         pkt_dev->cur_src_mac_offset = 0;
2097         pkt_dev->cur_saddr = pkt_dev->saddr_min;
2098         pkt_dev->cur_daddr = pkt_dev->daddr_min;
2099         pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2100         pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2101         pkt_dev->nflows = 0;
2102 }
2103
2104
2105 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2106 {
2107         ktime_t start_time, end_time;
2108         s64 remaining;
2109         struct hrtimer_sleeper t;
2110
2111         hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2112         hrtimer_set_expires(&t.timer, spin_until);
2113
2114         remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2115         if (remaining <= 0) {
2116                 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2117                 return;
2118         }
2119
2120         start_time = ktime_now();
2121         if (remaining < 100)
2122                 udelay(remaining);      /* really small just spin */
2123         else {
2124                 /* see do_nanosleep */
2125                 hrtimer_init_sleeper(&t, current);
2126                 do {
2127                         set_current_state(TASK_INTERRUPTIBLE);
2128                         hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2129                         if (!hrtimer_active(&t.timer))
2130                                 t.task = NULL;
2131
2132                         if (likely(t.task))
2133                                 schedule();
2134
2135                         hrtimer_cancel(&t.timer);
2136                 } while (t.task && pkt_dev->running && !signal_pending(current));
2137                 __set_current_state(TASK_RUNNING);
2138         }
2139         end_time = ktime_now();
2140
2141         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2142         pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2143 }
2144
2145 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2146 {
2147         pkt_dev->pkt_overhead = 0;
2148         pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2149         pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2150         pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2151 }
2152
2153 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2154 {
2155         return !!(pkt_dev->flows[flow].flags & F_INIT);
2156 }
2157
2158 static inline int f_pick(struct pktgen_dev *pkt_dev)
2159 {
2160         int flow = pkt_dev->curfl;
2161
2162         if (pkt_dev->flags & F_FLOW_SEQ) {
2163                 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2164                         /* reset time */
2165                         pkt_dev->flows[flow].count = 0;
2166                         pkt_dev->flows[flow].flags = 0;
2167                         pkt_dev->curfl += 1;
2168                         if (pkt_dev->curfl >= pkt_dev->cflows)
2169                                 pkt_dev->curfl = 0; /*reset */
2170                 }
2171         } else {
2172                 flow = random32() % pkt_dev->cflows;
2173                 pkt_dev->curfl = flow;
2174
2175                 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2176                         pkt_dev->flows[flow].count = 0;
2177                         pkt_dev->flows[flow].flags = 0;
2178                 }
2179         }
2180
2181         return pkt_dev->curfl;
2182 }
2183
2184
2185 #ifdef CONFIG_XFRM
2186 /* If there was already an IPSEC SA, we keep it as is, else
2187  * we go look for it ...
2188 */
2189 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2190 {
2191         struct xfrm_state *x = pkt_dev->flows[flow].x;
2192         if (!x) {
2193                 /*slow path: we dont already have xfrm_state*/
2194                 x = xfrm_stateonly_find(&init_net,
2195                                         (xfrm_address_t *)&pkt_dev->cur_daddr,
2196                                         (xfrm_address_t *)&pkt_dev->cur_saddr,
2197                                         AF_INET,
2198                                         pkt_dev->ipsmode,
2199                                         pkt_dev->ipsproto, 0);
2200                 if (x) {
2201                         pkt_dev->flows[flow].x = x;
2202                         set_pkt_overhead(pkt_dev);
2203                         pkt_dev->pkt_overhead += x->props.header_len;
2204                 }
2205
2206         }
2207 }
2208 #endif
2209 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2210 {
2211
2212         if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2213                 pkt_dev->cur_queue_map = smp_processor_id();
2214
2215         else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2216                 __u16 t;
2217                 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2218                         t = random32() %
2219                                 (pkt_dev->queue_map_max -
2220                                  pkt_dev->queue_map_min + 1)
2221                                 + pkt_dev->queue_map_min;
2222                 } else {
2223                         t = pkt_dev->cur_queue_map + 1;
2224                         if (t > pkt_dev->queue_map_max)
2225                                 t = pkt_dev->queue_map_min;
2226                 }
2227                 pkt_dev->cur_queue_map = t;
2228         }
2229         pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2230 }
2231
2232 /* Increment/randomize headers according to flags and current values
2233  * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2234  */
2235 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2236 {
2237         __u32 imn;
2238         __u32 imx;
2239         int flow = 0;
2240
2241         if (pkt_dev->cflows)
2242                 flow = f_pick(pkt_dev);
2243
2244         /*  Deal with source MAC */
2245         if (pkt_dev->src_mac_count > 1) {
2246                 __u32 mc;
2247                 __u32 tmp;
2248
2249                 if (pkt_dev->flags & F_MACSRC_RND)
2250                         mc = random32() % pkt_dev->src_mac_count;
2251                 else {
2252                         mc = pkt_dev->cur_src_mac_offset++;
2253                         if (pkt_dev->cur_src_mac_offset >=
2254                             pkt_dev->src_mac_count)
2255                                 pkt_dev->cur_src_mac_offset = 0;
2256                 }
2257
2258                 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2259                 pkt_dev->hh[11] = tmp;
2260                 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2261                 pkt_dev->hh[10] = tmp;
2262                 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2263                 pkt_dev->hh[9] = tmp;
2264                 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2265                 pkt_dev->hh[8] = tmp;
2266                 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2267                 pkt_dev->hh[7] = tmp;
2268         }
2269
2270         /*  Deal with Destination MAC */
2271         if (pkt_dev->dst_mac_count > 1) {
2272                 __u32 mc;
2273                 __u32 tmp;
2274
2275                 if (pkt_dev->flags & F_MACDST_RND)
2276                         mc = random32() % pkt_dev->dst_mac_count;
2277
2278                 else {
2279                         mc = pkt_dev->cur_dst_mac_offset++;
2280                         if (pkt_dev->cur_dst_mac_offset >=
2281                             pkt_dev->dst_mac_count) {
2282                                 pkt_dev->cur_dst_mac_offset = 0;
2283                         }
2284                 }
2285
2286                 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2287                 pkt_dev->hh[5] = tmp;
2288                 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2289                 pkt_dev->hh[4] = tmp;
2290                 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2291                 pkt_dev->hh[3] = tmp;
2292                 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2293                 pkt_dev->hh[2] = tmp;
2294                 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2295                 pkt_dev->hh[1] = tmp;
2296         }
2297
2298         if (pkt_dev->flags & F_MPLS_RND) {
2299                 unsigned i;
2300                 for (i = 0; i < pkt_dev->nr_labels; i++)
2301                         if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2302                                 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2303                                              ((__force __be32)random32() &
2304                                                       htonl(0x000fffff));
2305         }
2306
2307         if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2308                 pkt_dev->vlan_id = random32() & (4096-1);
2309         }
2310
2311         if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2312                 pkt_dev->svlan_id = random32() & (4096 - 1);
2313         }
2314
2315         if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2316                 if (pkt_dev->flags & F_UDPSRC_RND)
2317                         pkt_dev->cur_udp_src = random32() %
2318                                 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2319                                 + pkt_dev->udp_src_min;
2320
2321                 else {
2322                         pkt_dev->cur_udp_src++;
2323                         if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2324                                 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2325                 }
2326         }
2327
2328         if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2329                 if (pkt_dev->flags & F_UDPDST_RND) {
2330                         pkt_dev->cur_udp_dst = random32() %
2331                                 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2332                                 + pkt_dev->udp_dst_min;
2333                 } else {
2334                         pkt_dev->cur_udp_dst++;
2335                         if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2336                                 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2337                 }
2338         }
2339
2340         if (!(pkt_dev->flags & F_IPV6)) {
2341
2342                 imn = ntohl(pkt_dev->saddr_min);
2343                 imx = ntohl(pkt_dev->saddr_max);
2344                 if (imn < imx) {
2345                         __u32 t;
2346                         if (pkt_dev->flags & F_IPSRC_RND)
2347                                 t = random32() % (imx - imn) + imn;
2348                         else {
2349                                 t = ntohl(pkt_dev->cur_saddr);
2350                                 t++;
2351                                 if (t > imx)
2352                                         t = imn;
2353
2354                         }
2355                         pkt_dev->cur_saddr = htonl(t);
2356                 }
2357
2358                 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2359                         pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2360                 } else {
2361                         imn = ntohl(pkt_dev->daddr_min);
2362                         imx = ntohl(pkt_dev->daddr_max);
2363                         if (imn < imx) {
2364                                 __u32 t;
2365                                 __be32 s;
2366                                 if (pkt_dev->flags & F_IPDST_RND) {
2367
2368                                         t = random32() % (imx - imn) + imn;
2369                                         s = htonl(t);
2370
2371                                         while (ipv4_is_loopback(s) ||
2372                                                ipv4_is_multicast(s) ||
2373                                                ipv4_is_lbcast(s) ||
2374                                                ipv4_is_zeronet(s) ||
2375                                                ipv4_is_local_multicast(s)) {
2376                                                 t = random32() % (imx - imn) + imn;
2377                                                 s = htonl(t);
2378                                         }
2379                                         pkt_dev->cur_daddr = s;
2380                                 } else {
2381                                         t = ntohl(pkt_dev->cur_daddr);
2382                                         t++;
2383                                         if (t > imx) {
2384                                                 t = imn;
2385                                         }
2386                                         pkt_dev->cur_daddr = htonl(t);
2387                                 }
2388                         }
2389                         if (pkt_dev->cflows) {
2390                                 pkt_dev->flows[flow].flags |= F_INIT;
2391                                 pkt_dev->flows[flow].cur_daddr =
2392                                     pkt_dev->cur_daddr;
2393 #ifdef CONFIG_XFRM
2394                                 if (pkt_dev->flags & F_IPSEC_ON)
2395                                         get_ipsec_sa(pkt_dev, flow);
2396 #endif
2397                                 pkt_dev->nflows++;
2398                         }
2399                 }
2400         } else {                /* IPV6 * */
2401
2402                 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2403                     pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2404                     pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2405                     pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2406                 else {
2407                         int i;
2408
2409                         /* Only random destinations yet */
2410
2411                         for (i = 0; i < 4; i++) {
2412                                 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2413                                     (((__force __be32)random32() |
2414                                       pkt_dev->min_in6_daddr.s6_addr32[i]) &
2415                                      pkt_dev->max_in6_daddr.s6_addr32[i]);
2416                         }
2417                 }
2418         }
2419
2420         if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2421                 __u32 t;
2422                 if (pkt_dev->flags & F_TXSIZE_RND) {
2423                         t = random32() %
2424                                 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2425                                 + pkt_dev->min_pkt_size;
2426                 } else {
2427                         t = pkt_dev->cur_pkt_size + 1;
2428                         if (t > pkt_dev->max_pkt_size)
2429                                 t = pkt_dev->min_pkt_size;
2430                 }
2431                 pkt_dev->cur_pkt_size = t;
2432         }
2433
2434         set_cur_queue_map(pkt_dev);
2435
2436         pkt_dev->flows[flow].count++;
2437 }
2438
2439
2440 #ifdef CONFIG_XFRM
2441 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2442 {
2443         struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2444         int err = 0;
2445         struct iphdr *iph;
2446
2447         if (!x)
2448                 return 0;
2449         /* XXX: we dont support tunnel mode for now until
2450          * we resolve the dst issue */
2451         if (x->props.mode != XFRM_MODE_TRANSPORT)
2452                 return 0;
2453
2454         spin_lock(&x->lock);
2455         iph = ip_hdr(skb);
2456
2457         err = x->outer_mode->output(x, skb);
2458         if (err)
2459                 goto error;
2460         err = x->type->output(x, skb);
2461         if (err)
2462                 goto error;
2463
2464         x->curlft.bytes += skb->len;
2465         x->curlft.packets++;
2466 error:
2467         spin_unlock(&x->lock);
2468         return err;
2469 }
2470
2471 static void free_SAs(struct pktgen_dev *pkt_dev)
2472 {
2473         if (pkt_dev->cflows) {
2474                 /* let go of the SAs if we have them */
2475                 int i = 0;
2476                 for (;  i < pkt_dev->cflows; i++) {
2477                         struct xfrm_state *x = pkt_dev->flows[i].x;
2478                         if (x) {
2479                                 xfrm_state_put(x);
2480                                 pkt_dev->flows[i].x = NULL;
2481                         }
2482                 }
2483         }
2484 }
2485
2486 static int process_ipsec(struct pktgen_dev *pkt_dev,
2487                               struct sk_buff *skb, __be16 protocol)
2488 {
2489         if (pkt_dev->flags & F_IPSEC_ON) {
2490                 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2491                 int nhead = 0;
2492                 if (x) {
2493                         int ret;
2494                         __u8 *eth;
2495                         nhead = x->props.header_len - skb_headroom(skb);
2496                         if (nhead > 0) {
2497                                 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2498                                 if (ret < 0) {
2499                                         printk(KERN_ERR "Error expanding "
2500                                                "ipsec packet %d\n", ret);
2501                                         goto err;
2502                                 }
2503                         }
2504
2505                         /* ipsec is not expecting ll header */
2506                         skb_pull(skb, ETH_HLEN);
2507                         ret = pktgen_output_ipsec(skb, pkt_dev);
2508                         if (ret) {
2509                                 printk(KERN_ERR "Error creating ipsec "
2510                                        "packet %d\n", ret);
2511                                 goto err;
2512                         }
2513                         /* restore ll */
2514                         eth = (__u8 *) skb_push(skb, ETH_HLEN);
2515                         memcpy(eth, pkt_dev->hh, 12);
2516                         *(u16 *) &eth[12] = protocol;
2517                 }
2518         }
2519         return 1;
2520 err:
2521         kfree_skb(skb);
2522         return 0;
2523 }
2524 #endif
2525
2526 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2527 {
2528         unsigned i;
2529         for (i = 0; i < pkt_dev->nr_labels; i++)
2530                 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2531
2532         mpls--;
2533         *mpls |= MPLS_STACK_BOTTOM;
2534 }
2535
2536 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2537                                unsigned int prio)
2538 {
2539         return htons(id | (cfi << 12) | (prio << 13));
2540 }
2541
2542 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2543                                         struct pktgen_dev *pkt_dev)
2544 {
2545         struct sk_buff *skb = NULL;
2546         __u8 *eth;
2547         struct udphdr *udph;
2548         int datalen, iplen;
2549         struct iphdr *iph;
2550         struct pktgen_hdr *pgh = NULL;
2551         __be16 protocol = htons(ETH_P_IP);
2552         __be32 *mpls;
2553         __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2554         __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2555         __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2556         __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2557         u16 queue_map;
2558
2559         if (pkt_dev->nr_labels)
2560                 protocol = htons(ETH_P_MPLS_UC);
2561
2562         if (pkt_dev->vlan_id != 0xffff)
2563                 protocol = htons(ETH_P_8021Q);
2564
2565         /* Update any of the values, used when we're incrementing various
2566          * fields.
2567          */
2568         queue_map = pkt_dev->cur_queue_map;
2569         mod_cur_headers(pkt_dev);
2570
2571         datalen = (odev->hard_header_len + 16) & ~0xf;
2572         skb = __netdev_alloc_skb(odev,
2573                                  pkt_dev->cur_pkt_size + 64
2574                                  + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2575         if (!skb) {
2576                 sprintf(pkt_dev->result, "No memory");
2577                 return NULL;
2578         }
2579
2580         skb_reserve(skb, datalen);
2581
2582         /*  Reserve for ethernet and IP header  */
2583         eth = (__u8 *) skb_push(skb, 14);
2584         mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2585         if (pkt_dev->nr_labels)
2586                 mpls_push(mpls, pkt_dev);
2587
2588         if (pkt_dev->vlan_id != 0xffff) {
2589                 if (pkt_dev->svlan_id != 0xffff) {
2590                         svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2591                         *svlan_tci = build_tci(pkt_dev->svlan_id,
2592                                                pkt_dev->svlan_cfi,
2593                                                pkt_dev->svlan_p);
2594                         svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2595                         *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2596                 }
2597                 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2598                 *vlan_tci = build_tci(pkt_dev->vlan_id,
2599                                       pkt_dev->vlan_cfi,
2600                                       pkt_dev->vlan_p);
2601                 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2602                 *vlan_encapsulated_proto = htons(ETH_P_IP);
2603         }
2604
2605         skb->network_header = skb->tail;
2606         skb->transport_header = skb->network_header + sizeof(struct iphdr);
2607         skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2608         skb_set_queue_mapping(skb, queue_map);
2609         iph = ip_hdr(skb);
2610         udph = udp_hdr(skb);
2611
2612         memcpy(eth, pkt_dev->hh, 12);
2613         *(__be16 *) & eth[12] = protocol;
2614
2615         /* Eth + IPh + UDPh + mpls */
2616         datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2617                   pkt_dev->pkt_overhead;
2618         if (datalen < sizeof(struct pktgen_hdr))
2619                 datalen = sizeof(struct pktgen_hdr);
2620
2621         udph->source = htons(pkt_dev->cur_udp_src);
2622         udph->dest = htons(pkt_dev->cur_udp_dst);
2623         udph->len = htons(datalen + 8); /* DATA + udphdr */
2624         udph->check = 0;        /* No checksum */
2625
2626         iph->ihl = 5;
2627         iph->version = 4;
2628         iph->ttl = 32;
2629         iph->tos = pkt_dev->tos;
2630         iph->protocol = IPPROTO_UDP;    /* UDP */
2631         iph->saddr = pkt_dev->cur_saddr;
2632         iph->daddr = pkt_dev->cur_daddr;
2633         iph->frag_off = 0;
2634         iplen = 20 + 8 + datalen;
2635         iph->tot_len = htons(iplen);
2636         iph->check = 0;
2637         iph->check = ip_fast_csum((void *)iph, iph->ihl);
2638         skb->protocol = protocol;
2639         skb->mac_header = (skb->network_header - ETH_HLEN -
2640                            pkt_dev->pkt_overhead);
2641         skb->dev = odev;
2642         skb->pkt_type = PACKET_HOST;
2643
2644         if (pkt_dev->nfrags <= 0)
2645                 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2646         else {
2647                 int frags = pkt_dev->nfrags;
2648                 int i;
2649
2650                 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2651
2652                 if (frags > MAX_SKB_FRAGS)
2653                         frags = MAX_SKB_FRAGS;
2654                 if (datalen > frags * PAGE_SIZE) {
2655                         skb_put(skb, datalen - frags * PAGE_SIZE);
2656                         datalen = frags * PAGE_SIZE;
2657                 }
2658
2659                 i = 0;
2660                 while (datalen > 0) {
2661                         struct page *page = alloc_pages(GFP_KERNEL, 0);
2662                         skb_shinfo(skb)->frags[i].page = page;
2663                         skb_shinfo(skb)->frags[i].page_offset = 0;
2664                         skb_shinfo(skb)->frags[i].size =
2665                             (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2666                         datalen -= skb_shinfo(skb)->frags[i].size;
2667                         skb->len += skb_shinfo(skb)->frags[i].size;
2668                         skb->data_len += skb_shinfo(skb)->frags[i].size;
2669                         i++;
2670                         skb_shinfo(skb)->nr_frags = i;
2671                 }
2672
2673                 while (i < frags) {
2674                         int rem;
2675
2676                         if (i == 0)
2677                                 break;
2678
2679                         rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2680                         if (rem == 0)
2681                                 break;
2682
2683                         skb_shinfo(skb)->frags[i - 1].size -= rem;
2684
2685                         skb_shinfo(skb)->frags[i] =
2686                             skb_shinfo(skb)->frags[i - 1];
2687                         get_page(skb_shinfo(skb)->frags[i].page);
2688                         skb_shinfo(skb)->frags[i].page =
2689                             skb_shinfo(skb)->frags[i - 1].page;
2690                         skb_shinfo(skb)->frags[i].page_offset +=
2691                             skb_shinfo(skb)->frags[i - 1].size;
2692                         skb_shinfo(skb)->frags[i].size = rem;
2693                         i++;
2694                         skb_shinfo(skb)->nr_frags = i;
2695                 }
2696         }
2697
2698         /* Stamp the time, and sequence number,
2699          * convert them to network byte order
2700          */
2701         if (pgh) {
2702                 struct timeval timestamp;
2703
2704                 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2705                 pgh->seq_num = htonl(pkt_dev->seq_num);
2706
2707                 do_gettimeofday(&timestamp);
2708                 pgh->tv_sec = htonl(timestamp.tv_sec);
2709                 pgh->tv_usec = htonl(timestamp.tv_usec);
2710         }
2711
2712 #ifdef CONFIG_XFRM
2713         if (!process_ipsec(pkt_dev, skb, protocol))
2714                 return NULL;
2715 #endif
2716
2717         return skb;
2718 }
2719
2720 /*
2721  * scan_ip6, fmt_ip taken from dietlibc-0.21
2722  * Author Felix von Leitner <felix-dietlibc@fefe.de>
2723  *
2724  * Slightly modified for kernel.
2725  * Should be candidate for net/ipv4/utils.c
2726  * --ro
2727  */
2728
2729 static unsigned int scan_ip6(const char *s, char ip[16])
2730 {
2731         unsigned int i;
2732         unsigned int len = 0;
2733         unsigned long u;
2734         char suffix[16];
2735         unsigned int prefixlen = 0;
2736         unsigned int suffixlen = 0;
2737         __be32 tmp;
2738         char *pos;
2739
2740         for (i = 0; i < 16; i++)
2741                 ip[i] = 0;
2742
2743         for (;;) {
2744                 if (*s == ':') {
2745                         len++;
2746                         if (s[1] == ':') {      /* Found "::", skip to part 2 */
2747                                 s += 2;
2748                                 len++;
2749                                 break;
2750                         }
2751                         s++;
2752                 }
2753
2754                 u = simple_strtoul(s, &pos, 16);
2755                 i = pos - s;
2756                 if (!i)
2757                         return 0;
2758                 if (prefixlen == 12 && s[i] == '.') {
2759
2760                         /* the last 4 bytes may be written as IPv4 address */
2761
2762                         tmp = in_aton(s);
2763                         memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2764                         return i + len;
2765                 }
2766                 ip[prefixlen++] = (u >> 8);
2767                 ip[prefixlen++] = (u & 255);
2768                 s += i;
2769                 len += i;
2770                 if (prefixlen == 16)
2771                         return len;
2772         }
2773
2774 /* part 2, after "::" */
2775         for (;;) {
2776                 if (*s == ':') {
2777                         if (suffixlen == 0)
2778                                 break;
2779                         s++;
2780                         len++;
2781                 } else if (suffixlen != 0)
2782                         break;
2783
2784                 u = simple_strtol(s, &pos, 16);
2785                 i = pos - s;
2786                 if (!i) {
2787                         if (*s)
2788                                 len--;
2789                         break;
2790                 }
2791                 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2792                         tmp = in_aton(s);
2793                         memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2794                                sizeof(tmp));
2795                         suffixlen += 4;
2796                         len += strlen(s);
2797                         break;
2798                 }
2799                 suffix[suffixlen++] = (u >> 8);
2800                 suffix[suffixlen++] = (u & 255);
2801                 s += i;
2802                 len += i;
2803                 if (prefixlen + suffixlen == 16)
2804                         break;
2805         }
2806         for (i = 0; i < suffixlen; i++)
2807                 ip[16 - suffixlen + i] = suffix[i];
2808         return len;
2809 }
2810
2811 static char tohex(char hexdigit)
2812 {
2813         return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2814 }
2815
2816 static int fmt_xlong(char *s, unsigned int i)
2817 {
2818         char *bak = s;
2819         *s = tohex((i >> 12) & 0xf);
2820         if (s != bak || *s != '0')
2821                 ++s;
2822         *s = tohex((i >> 8) & 0xf);
2823         if (s != bak || *s != '0')
2824                 ++s;
2825         *s = tohex((i >> 4) & 0xf);
2826         if (s != bak || *s != '0')
2827                 ++s;
2828         *s = tohex(i & 0xf);
2829         return s - bak + 1;
2830 }
2831
2832 static unsigned int fmt_ip6(char *s, const char ip[16])
2833 {
2834         unsigned int len;
2835         unsigned int i;
2836         unsigned int temp;
2837         unsigned int compressing;
2838         int j;
2839
2840         len = 0;
2841         compressing = 0;
2842         for (j = 0; j < 16; j += 2) {
2843
2844 #ifdef V4MAPPEDPREFIX
2845                 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2846                         inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2847                         temp = strlen(s);
2848                         return len + temp;
2849                 }
2850 #endif
2851                 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2852                     (unsigned long)(unsigned char)ip[j + 1];
2853                 if (temp == 0) {
2854                         if (!compressing) {
2855                                 compressing = 1;
2856                                 if (j == 0) {
2857                                         *s++ = ':';
2858                                         ++len;
2859                                 }
2860                         }
2861                 } else {
2862                         if (compressing) {
2863                                 compressing = 0;
2864                                 *s++ = ':';
2865                                 ++len;
2866                         }
2867                         i = fmt_xlong(s, temp);
2868                         len += i;
2869                         s += i;
2870                         if (j < 14) {
2871                                 *s++ = ':';
2872                                 ++len;
2873                         }
2874                 }
2875         }
2876         if (compressing) {
2877                 *s++ = ':';
2878                 ++len;
2879         }
2880         *s = 0;
2881         return len;
2882 }
2883
2884 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2885                                         struct pktgen_dev *pkt_dev)
2886 {
2887         struct sk_buff *skb = NULL;
2888         __u8 *eth;
2889         struct udphdr *udph;
2890         int datalen;
2891         struct ipv6hdr *iph;
2892         struct pktgen_hdr *pgh = NULL;
2893         __be16 protocol = htons(ETH_P_IPV6);
2894         __be32 *mpls;
2895         __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2896         __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2897         __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2898         __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2899         u16 queue_map;
2900
2901         if (pkt_dev->nr_labels)
2902                 protocol = htons(ETH_P_MPLS_UC);
2903
2904         if (pkt_dev->vlan_id != 0xffff)
2905                 protocol = htons(ETH_P_8021Q);
2906
2907         /* Update any of the values, used when we're incrementing various
2908          * fields.
2909          */
2910         queue_map = pkt_dev->cur_queue_map;
2911         mod_cur_headers(pkt_dev);
2912
2913         skb = __netdev_alloc_skb(odev,
2914                                  pkt_dev->cur_pkt_size + 64
2915                                  + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2916         if (!skb) {
2917                 sprintf(pkt_dev->result, "No memory");
2918                 return NULL;
2919         }
2920
2921         skb_reserve(skb, 16);
2922
2923         /*  Reserve for ethernet and IP header  */
2924         eth = (__u8 *) skb_push(skb, 14);
2925         mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2926         if (pkt_dev->nr_labels)
2927                 mpls_push(mpls, pkt_dev);
2928
2929         if (pkt_dev->vlan_id != 0xffff) {
2930                 if (pkt_dev->svlan_id != 0xffff) {
2931                         svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2932                         *svlan_tci = build_tci(pkt_dev->svlan_id,
2933                                                pkt_dev->svlan_cfi,
2934                                                pkt_dev->svlan_p);
2935                         svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2936                         *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2937                 }
2938                 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2939                 *vlan_tci = build_tci(pkt_dev->vlan_id,
2940                                       pkt_dev->vlan_cfi,
2941                                       pkt_dev->vlan_p);
2942                 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2943                 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2944         }
2945
2946         skb->network_header = skb->tail;
2947         skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2948         skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2949         skb_set_queue_mapping(skb, queue_map);
2950         iph = ipv6_hdr(skb);
2951         udph = udp_hdr(skb);
2952
2953         memcpy(eth, pkt_dev->hh, 12);
2954         *(__be16 *) &eth[12] = protocol;
2955
2956         /* Eth + IPh + UDPh + mpls */
2957         datalen = pkt_dev->cur_pkt_size - 14 -
2958                   sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2959                   pkt_dev->pkt_overhead;
2960
2961         if (datalen < sizeof(struct pktgen_hdr)) {
2962                 datalen = sizeof(struct pktgen_hdr);
2963                 if (net_ratelimit())
2964                         printk(KERN_INFO "pktgen: increased datalen to %d\n",
2965                                datalen);
2966         }
2967
2968         udph->source = htons(pkt_dev->cur_udp_src);
2969         udph->dest = htons(pkt_dev->cur_udp_dst);
2970         udph->len = htons(datalen + sizeof(struct udphdr));
2971         udph->check = 0;        /* No checksum */
2972
2973         *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
2974
2975         if (pkt_dev->traffic_class) {
2976                 /* Version + traffic class + flow (0) */
2977                 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2978         }
2979
2980         iph->hop_limit = 32;
2981
2982         iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2983         iph->nexthdr = IPPROTO_UDP;
2984
2985         ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2986         ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2987
2988         skb->mac_header = (skb->network_header - ETH_HLEN -
2989                            pkt_dev->pkt_overhead);
2990         skb->protocol = protocol;
2991         skb->dev = odev;
2992         skb->pkt_type = PACKET_HOST;
2993
2994         if (pkt_dev->nfrags <= 0)
2995                 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2996         else {
2997                 int frags = pkt_dev->nfrags;
2998                 int i;
2999
3000                 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3001
3002                 if (frags > MAX_SKB_FRAGS)
3003                         frags = MAX_SKB_FRAGS;
3004                 if (datalen > frags * PAGE_SIZE) {
3005                         skb_put(skb, datalen - frags * PAGE_SIZE);
3006                         datalen = frags * PAGE_SIZE;
3007                 }
3008
3009                 i = 0;
3010                 while (datalen > 0) {
3011                         struct page *page = alloc_pages(GFP_KERNEL, 0);
3012                         skb_shinfo(skb)->frags[i].page = page;
3013                         skb_shinfo(skb)->frags[i].page_offset = 0;
3014                         skb_shinfo(skb)->frags[i].size =
3015                             (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3016                         datalen -= skb_shinfo(skb)->frags[i].size;
3017                         skb->len += skb_shinfo(skb)->frags[i].size;
3018                         skb->data_len += skb_shinfo(skb)->frags[i].size;
3019                         i++;
3020                         skb_shinfo(skb)->nr_frags = i;
3021                 }
3022
3023                 while (i < frags) {
3024                         int rem;
3025
3026                         if (i == 0)
3027                                 break;
3028
3029                         rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3030                         if (rem == 0)
3031                                 break;
3032
3033                         skb_shinfo(skb)->frags[i - 1].size -= rem;
3034
3035                         skb_shinfo(skb)->frags[i] =
3036                             skb_shinfo(skb)->frags[i - 1];
3037                         get_page(skb_shinfo(skb)->frags[i].page);
3038                         skb_shinfo(skb)->frags[i].page =
3039                             skb_shinfo(skb)->frags[i - 1].page;
3040                         skb_shinfo(skb)->frags[i].page_offset +=
3041                             skb_shinfo(skb)->frags[i - 1].size;
3042                         skb_shinfo(skb)->frags[i].size = rem;
3043                         i++;
3044                         skb_shinfo(skb)->nr_frags = i;
3045                 }
3046         }
3047
3048         /* Stamp the time, and sequence number,
3049          * convert them to network byte order
3050          * should we update cloned packets too ?
3051          */
3052         if (pgh) {
3053                 struct timeval timestamp;
3054
3055                 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3056                 pgh->seq_num = htonl(pkt_dev->seq_num);
3057
3058                 do_gettimeofday(&timestamp);
3059                 pgh->tv_sec = htonl(timestamp.tv_sec);
3060                 pgh->tv_usec = htonl(timestamp.tv_usec);
3061         }
3062         /* pkt_dev->seq_num++; FF: you really mean this? */
3063
3064         return skb;
3065 }
3066
3067 static struct sk_buff *fill_packet(struct net_device *odev,
3068                                    struct pktgen_dev *pkt_dev)
3069 {
3070         if (pkt_dev->flags & F_IPV6)
3071                 return fill_packet_ipv6(odev, pkt_dev);
3072         else
3073                 return fill_packet_ipv4(odev, pkt_dev);
3074 }
3075
3076 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3077 {
3078         pkt_dev->seq_num = 1;
3079         pkt_dev->idle_acc = 0;
3080         pkt_dev->sofar = 0;
3081         pkt_dev->tx_bytes = 0;
3082         pkt_dev->errors = 0;
3083 }
3084
3085 /* Set up structure for sending pkts, clear counters */
3086
3087 static void pktgen_run(struct pktgen_thread *t)
3088 {
3089         struct pktgen_dev *pkt_dev;
3090         int started = 0;
3091
3092         pr_debug("pktgen: entering pktgen_run. %p\n", t);
3093
3094         if_lock(t);
3095         list_for_each_entry(pkt_dev, &t->if_list, list) {
3096
3097                 /*
3098                  * setup odev and create initial packet.
3099                  */
3100                 pktgen_setup_inject(pkt_dev);
3101
3102                 if (pkt_dev->odev) {
3103                         pktgen_clear_counters(pkt_dev);
3104                         pkt_dev->running = 1;   /* Cranke yeself! */
3105                         pkt_dev->skb = NULL;
3106                         pkt_dev->started_at =
3107                                 pkt_dev->next_tx = ktime_now();
3108
3109                         set_pkt_overhead(pkt_dev);
3110
3111                         strcpy(pkt_dev->result, "Starting");
3112                         started++;
3113                 } else
3114                         strcpy(pkt_dev->result, "Error starting");
3115         }
3116         if_unlock(t);
3117         if (started)
3118                 t->control &= ~(T_STOP);
3119 }
3120
3121 static void pktgen_stop_all_threads_ifs(void)
3122 {
3123         struct pktgen_thread *t;
3124
3125         pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3126
3127         mutex_lock(&pktgen_thread_lock);
3128
3129         list_for_each_entry(t, &pktgen_threads, th_list)
3130                 t->control |= T_STOP;
3131
3132         mutex_unlock(&pktgen_thread_lock);
3133 }
3134
3135 static int thread_is_running(const struct pktgen_thread *t)
3136 {
3137         const struct pktgen_dev *pkt_dev;
3138
3139         list_for_each_entry(pkt_dev, &t->if_list, list)
3140                 if (pkt_dev->running)
3141                         return 1;
3142         return 0;
3143 }
3144
3145 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3146 {
3147         if_lock(t);
3148
3149         while (thread_is_running(t)) {
3150
3151                 if_unlock(t);
3152
3153                 msleep_interruptible(100);
3154
3155                 if (signal_pending(current))
3156                         goto signal;
3157                 if_lock(t);
3158         }
3159         if_unlock(t);
3160         return 1;
3161 signal:
3162         return 0;
3163 }
3164
3165 static int pktgen_wait_all_threads_run(void)
3166 {
3167         struct pktgen_thread *t;
3168         int sig = 1;
3169
3170         mutex_lock(&pktgen_thread_lock);
3171
3172         list_for_each_entry(t, &pktgen_threads, th_list) {
3173                 sig = pktgen_wait_thread_run(t);
3174                 if (sig == 0)
3175                         break;
3176         }
3177
3178         if (sig == 0)
3179                 list_for_each_entry(t, &pktgen_threads, th_list)
3180                         t->control |= (T_STOP);
3181
3182         mutex_unlock(&pktgen_thread_lock);
3183         return sig;
3184 }
3185
3186 static void pktgen_run_all_threads(void)
3187 {
3188         struct pktgen_thread *t;
3189
3190         pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3191
3192         mutex_lock(&pktgen_thread_lock);
3193
3194         list_for_each_entry(t, &pktgen_threads, th_list)
3195                 t->control |= (T_RUN);
3196
3197         mutex_unlock(&pktgen_thread_lock);
3198
3199         /* Propagate thread->control  */
3200         schedule_timeout_interruptible(msecs_to_jiffies(125));
3201
3202         pktgen_wait_all_threads_run();
3203 }
3204
3205 static void pktgen_reset_all_threads(void)
3206 {
3207         struct pktgen_thread *t;
3208
3209         pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3210
3211         mutex_lock(&pktgen_thread_lock);
3212
3213         list_for_each_entry(t, &pktgen_threads, th_list)
3214                 t->control |= (T_REMDEVALL);
3215
3216         mutex_unlock(&pktgen_thread_lock);
3217
3218         /* Propagate thread->control  */
3219         schedule_timeout_interruptible(msecs_to_jiffies(125));
3220
3221         pktgen_wait_all_threads_run();
3222 }
3223
3224 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3225 {
3226         __u64 bps, mbps, pps;
3227         char *p = pkt_dev->result;
3228         ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3229                                     pkt_dev->started_at);
3230         ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3231
3232         p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3233                      (unsigned long long)ktime_to_us(elapsed),
3234                      (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3235                      (unsigned long long)ktime_to_us(idle),
3236                      (unsigned long long)pkt_dev->sofar,