linux/net/core/pktgen.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Authors:
   4 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
   5 *                             Uppsala University and
   6 *                             Swedish University of Agricultural Sciences
   7 *
   8 * Alexey Kuznetsov  <kuznet@ms2.inr.ac.ru>
   9 * Ben Greear <greearb@candelatech.com>
  10 * Jens Låås <jens.laas@data.slu.se>
  11 *
  12 * A tool for loading the network with preconfigurated packets.
  13 * The tool is implemented as a linux module.  Parameters are output
  14 * device, delay (to hard_xmit), number of packets, and whether
  15 * to use multiple SKBs or just the same one.
  16 * pktgen uses the installed interface's output routine.
  17 *
  18 * Additional hacking by:
  19 *
  20 * Jens.Laas@data.slu.se
  21 * Improved by ANK. 010120.
  22 * Improved by ANK even more. 010212.
  23 * MAC address typo fixed. 010417 --ro
  24 * Integrated.  020301 --DaveM
  25 * Added multiskb option 020301 --DaveM
  26 * Scaling of results. 020417--sigurdur@linpro.no
  27 * Significant re-work of the module:
  28 *   *  Convert to threaded model to more efficiently be able to transmit
  29 *       and receive on multiple interfaces at once.
  30 *   *  Converted many counters to __u64 to allow longer runs.
  31 *   *  Allow configuration of ranges, like min/max IP address, MACs,
  32 *       and UDP-ports, for both source and destination, and can
  33 *       set to use a random distribution or sequentially walk the range.
  34 *   *  Can now change most values after starting.
  35 *   *  Place 12-byte packet in UDP payload with magic number,
  36 *       sequence number, and timestamp.
  37 *   *  Add receiver code that detects dropped pkts, re-ordered pkts, and
  38 *       latencies (with micro-second) precision.
  39 *   *  Add IOCTL interface to easily get counters & configuration.
  40 *   --Ben Greear <greearb@candelatech.com>
  41 *
  42 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
  43 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
  44 * as a "fastpath" with a configurable number of clones after alloc's.
  45 * clone_skb=0 means all packets are allocated this also means ranges time
  46 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
  47 * clones.
  48 *
  49 * Also moved to /proc/net/pktgen/
  50 * --ro
  51 *
  52 * Sept 10:  Fixed threading/locking.  Lots of bone-headed and more clever
  53 *    mistakes.  Also merged in DaveM's patch in the -pre6 patch.
  54 * --Ben Greear <greearb@candelatech.com>
  55 *
  56 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
  57 *
  58 * 021124 Finished major redesign and rewrite for new functionality.
  59 * See Documentation/networking/pktgen.txt for how to use this.
  60 *
  61 * The new operation:
  62 * For each CPU one thread/process is created at start. This process checks
  63 * for running devices in the if_list and sends packets until count is 0 it
  64 * also the thread checks the thread->control which is used for inter-process
  65 * communication. controlling process "posts" operations to the threads this
  66 * way.
  67 * The if_list is RCU protected, and the if_lock remains to protect updating
  68 * of if_list, from "add_device" as it invoked from userspace (via proc write).
  69 *
  70 * By design there should only be *one* "controlling" process. In practice
  71 * multiple write accesses gives unpredictable result. Understood by "write"
  72 * to /proc gives result code thats should be read be the "writer".
  73 * For practical use this should be no problem.
  74 *
  75 * Note when adding devices to a specific CPU there good idea to also assign
  76 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
  77 * --ro
  78 *
  79 * Fix refcount off by one if first packet fails, potential null deref,
  80 * memleak 030710- KJP
  81 *
  82 * First "ranges" functionality for ipv6 030726 --ro
  83 *
  84 * Included flow support. 030802 ANK.
  85 *
  86 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
  87 *
  88 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
  89 * ia64 compilation fix from  Aron Griffis <aron@hp.com> 040604
  90 *
  91 * New xmit() return, do_div and misc clean up by Stephen Hemminger
  92 * <shemminger@osdl.org> 040923
  93 *
  94 * Randy Dunlap fixed u64 printk compiler warning
  95 *
  96 * Remove FCS from BW calculation.  Lennert Buytenhek <buytenh@wantstofly.org>
  97 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
  98 *
  99 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
 100 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
 101 *
 102 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
 103 * 050103
 104 *
 105 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
 106 *
 107 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
 108 *
 109 * Fixed src_mac command to set source mac of packet to value specified in
 110 * command by Adit Ranadive <adit.262@gmail.com>
 111 */
 112
 113#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 114
 115#include <linux/sys.h>
 116#include <linux/types.h>
 117#include <linux/module.h>
 118#include <linux/moduleparam.h>
 119#include <linux/kernel.h>
 120#include <linux/mutex.h>
 121#include <linux/sched.h>
 122#include <linux/slab.h>
 123#include <linux/vmalloc.h>
 124#include <linux/unistd.h>
 125#include <linux/string.h>
 126#include <linux/ptrace.h>
 127#include <linux/errno.h>
 128#include <linux/ioport.h>
 129#include <linux/interrupt.h>
 130#include <linux/capability.h>
 131#include <linux/hrtimer.h>
 132#include <linux/freezer.h>
 133#include <linux/delay.h>
 134#include <linux/timer.h>
 135#include <linux/list.h>
 136#include <linux/init.h>
 137#include <linux/skbuff.h>
 138#include <linux/netdevice.h>
 139#include <linux/inet.h>
 140#include <linux/inetdevice.h>
 141#include <linux/rtnetlink.h>
 142#include <linux/if_arp.h>
 143#include <linux/if_vlan.h>
 144#include <linux/in.h>
 145#include <linux/ip.h>
 146#include <linux/ipv6.h>
 147#include <linux/udp.h>
 148#include <linux/proc_fs.h>
 149#include <linux/seq_file.h>
 150#include <linux/wait.h>
 151#include <linux/etherdevice.h>
 152#include <linux/kthread.h>
 153#include <linux/prefetch.h>
 154#include <linux/mmzone.h>
 155#include <net/net_namespace.h>
 156#include <net/checksum.h>
 157#include <net/ipv6.h>
 158#include <net/udp.h>
 159#include <net/ip6_checksum.h>
 160#include <net/addrconf.h>
 161#ifdef CONFIG_XFRM
 162#include <net/xfrm.h>
 163#endif
 164#include <net/netns/generic.h>
 165#include <asm/byteorder.h>
 166#include <linux/rcupdate.h>
 167#include <linux/bitops.h>
 168#include <linux/io.h>
 169#include <linux/timex.h>
 170#include <linux/uaccess.h>
 171#include <asm/dma.h>
 172#include <asm/div64.h>          /* do_div */
 173
 174#define VERSION "2.75"
 175#define IP_NAME_SZ 32
 176#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
 177#define MPLS_STACK_BOTTOM htonl(0x00000100)
 178
 179#define func_enter() pr_debug("entering %s\n", __func__);
 180
 181#define PKT_FLAGS                                                       \
 182        pf(IPV6)                /* Interface in IPV6 Mode */            \
 183        pf(IPSRC_RND)           /* IP-Src Random  */                    \
 184        pf(IPDST_RND)           /* IP-Dst Random  */                    \
 185        pf(TXSIZE_RND)          /* Transmit size is random */           \
 186        pf(UDPSRC_RND)          /* UDP-Src Random */                    \
 187        pf(UDPDST_RND)          /* UDP-Dst Random */                    \
 188        pf(UDPCSUM)             /* Include UDP checksum */              \
 189        pf(NO_TIMESTAMP)        /* Don't timestamp packets (default TS) */ \
 190        pf(MPLS_RND)            /* Random MPLS labels */                \
 191        pf(QUEUE_MAP_RND)       /* queue map Random */                  \
 192        pf(QUEUE_MAP_CPU)       /* queue map mirrors smp_processor_id() */ \
 193        pf(FLOW_SEQ)            /* Sequential flows */                  \
 194        pf(IPSEC)               /* ipsec on for flows */                \
 195        pf(MACSRC_RND)          /* MAC-Src Random */                    \
 196        pf(MACDST_RND)          /* MAC-Dst Random */                    \
 197        pf(VID_RND)             /* Random VLAN ID */                    \
 198        pf(SVID_RND)            /* Random SVLAN ID */                   \
 199        pf(NODE)                /* Node memory alloc*/                  \
 200
 201#define pf(flag)                flag##_SHIFT,
 202enum pkt_flags {
 203        PKT_FLAGS
 204};
 205#undef pf
 206
 207/* Device flag bits */
 208#define pf(flag)                static const __u32 F_##flag = (1<<flag##_SHIFT);
 209PKT_FLAGS
 210#undef pf
 211
 212#define pf(flag)                __stringify(flag),
 213static char *pkt_flag_names[] = {
 214        PKT_FLAGS
 215};
 216#undef pf
 217
 218#define NR_PKT_FLAGS            ARRAY_SIZE(pkt_flag_names)
 219
 220/* Thread control flag bits */
 221#define T_STOP        (1<<0)    /* Stop run */
 222#define T_RUN         (1<<1)    /* Start run */
 223#define T_REMDEVALL   (1<<2)    /* Remove all devs */
 224#define T_REMDEV      (1<<3)    /* Remove one dev */
 225
 226/* Xmit modes */
 227#define M_START_XMIT            0       /* Default normal TX */
 228#define M_NETIF_RECEIVE         1       /* Inject packets into stack */
 229#define M_QUEUE_XMIT            2       /* Inject packet into qdisc */
 230
 231/* If lock -- protects updating of if_list */
 232#define   if_lock(t)           mutex_lock(&(t->if_lock));
 233#define   if_unlock(t)           mutex_unlock(&(t->if_lock));
 234
 235/* Used to help with determining the pkts on receive */
 236#define PKTGEN_MAGIC 0xbe9be955
 237#define PG_PROC_DIR "pktgen"
 238#define PGCTRL      "pgctrl"
 239
 240#define MAX_CFLOWS  65536
 241
 242#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
 243#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
 244
 245struct flow_state {
 246        __be32 cur_daddr;
 247        int count;
 248#ifdef CONFIG_XFRM
 249        struct xfrm_state *x;
 250#endif
 251        __u32 flags;
 252};
 253
 254/* flow flag bits */
 255#define F_INIT   (1<<0)         /* flow has been initialized */
 256
 257struct pktgen_dev {
 258        /*
 259         * Try to keep frequent/infrequent used vars. separated.
 260         */
 261        struct proc_dir_entry *entry;   /* proc file */
 262        struct pktgen_thread *pg_thread;/* the owner */
 263        struct list_head list;          /* chaining in the thread's run-queue */
 264        struct rcu_head  rcu;           /* freed by RCU */
 265
 266        int running;            /* if false, the test will stop */
 267
 268        /* If min != max, then we will either do a linear iteration, or
 269         * we will do a random selection from within the range.
 270         */
 271        __u32 flags;
 272        int xmit_mode;
 273        int min_pkt_size;
 274        int max_pkt_size;
 275        int pkt_overhead;       /* overhead for MPLS, VLANs, IPSEC etc */
 276        int nfrags;
 277        int removal_mark;       /* non-zero => the device is marked for
 278                                 * removal by worker thread */
 279
 280        struct page *page;
 281        u64 delay;              /* nano-seconds */
 282
 283        __u64 count;            /* Default No packets to send */
 284        __u64 sofar;            /* How many pkts we've sent so far */
 285        __u64 tx_bytes;         /* How many bytes we've transmitted */
 286        __u64 errors;           /* Errors when trying to transmit, */
 287
 288        /* runtime counters relating to clone_skb */
 289
 290        __u32 clone_count;
 291        int last_ok;            /* Was last skb sent?
 292                                 * Or a failed transmit of some sort?
 293                                 * This will keep sequence numbers in order
 294                                 */
 295        ktime_t next_tx;
 296        ktime_t started_at;
 297        ktime_t stopped_at;
 298        u64     idle_acc;       /* nano-seconds */
 299
 300        __u32 seq_num;
 301
 302        int clone_skb;          /*
 303                                 * Use multiple SKBs during packet gen.
 304                                 * If this number is greater than 1, then
 305                                 * that many copies of the same packet will be
 306                                 * sent before a new packet is allocated.
 307                                 * If you want to send 1024 identical packets
 308                                 * before creating a new packet,
 309                                 * set clone_skb to 1024.
 310                                 */
 311
 312        char dst_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 313        char dst_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 314        char src_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 315        char src_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
 316
 317        struct in6_addr in6_saddr;
 318        struct in6_addr in6_daddr;
 319        struct in6_addr cur_in6_daddr;
 320        struct in6_addr cur_in6_saddr;
 321        /* For ranges */
 322        struct in6_addr min_in6_daddr;
 323        struct in6_addr max_in6_daddr;
 324        struct in6_addr min_in6_saddr;
 325        struct in6_addr max_in6_saddr;
 326
 327        /* If we're doing ranges, random or incremental, then this
 328         * defines the min/max for those ranges.
 329         */
 330        __be32 saddr_min;       /* inclusive, source IP address */
 331        __be32 saddr_max;       /* exclusive, source IP address */
 332        __be32 daddr_min;       /* inclusive, dest IP address */
 333        __be32 daddr_max;       /* exclusive, dest IP address */
 334
 335        __u16 udp_src_min;      /* inclusive, source UDP port */
 336        __u16 udp_src_max;      /* exclusive, source UDP port */
 337        __u16 udp_dst_min;      /* inclusive, dest UDP port */
 338        __u16 udp_dst_max;      /* exclusive, dest UDP port */
 339
 340        /* DSCP + ECN */
 341        __u8 tos;            /* six MSB of (former) IPv4 TOS
 342                                are for dscp codepoint */
 343        __u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6
 344                                (see RFC 3260, sec. 4) */
 345
 346        /* MPLS */
 347        unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
 348        __be32 labels[MAX_MPLS_LABELS];
 349
 350        /* VLAN/SVLAN (802.1Q/Q-in-Q) */
 351        __u8  vlan_p;
 352        __u8  vlan_cfi;
 353        __u16 vlan_id;  /* 0xffff means no vlan tag */
 354
 355        __u8  svlan_p;
 356        __u8  svlan_cfi;
 357        __u16 svlan_id; /* 0xffff means no svlan tag */
 358
 359        __u32 src_mac_count;    /* How many MACs to iterate through */
 360        __u32 dst_mac_count;    /* How many MACs to iterate through */
 361
 362        unsigned char dst_mac[ETH_ALEN];
 363        unsigned char src_mac[ETH_ALEN];
 364
 365        __u32 cur_dst_mac_offset;
 366        __u32 cur_src_mac_offset;
 367        __be32 cur_saddr;
 368        __be32 cur_daddr;
 369        __u16 ip_id;
 370        __u16 cur_udp_dst;
 371        __u16 cur_udp_src;
 372        __u16 cur_queue_map;
 373        __u32 cur_pkt_size;
 374        __u32 last_pkt_size;
 375
 376        __u8 hh[14];
 377        /* = {
 378           0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
 379
 380           We fill in SRC address later
 381           0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 382           0x08, 0x00
 383           };
 384         */
 385        __u16 pad;              /* pad out the hh struct to an even 16 bytes */
 386
 387        struct sk_buff *skb;    /* skb we are to transmit next, used for when we
 388                                 * are transmitting the same one multiple times
 389                                 */
 390        struct net_device *odev; /* The out-going device.
 391                                  * Note that the device should have it's
 392                                  * pg_info pointer pointing back to this
 393                                  * device.
 394                                  * Set when the user specifies the out-going
 395                                  * device name (not when the inject is
 396                                  * started as it used to do.)
 397                                  */
 398        char odevname[32];
 399        struct flow_state *flows;
 400        unsigned int cflows;    /* Concurrent flows (config) */
 401        unsigned int lflow;             /* Flow length  (config) */
 402        unsigned int nflows;    /* accumulated flows (stats) */
 403        unsigned int curfl;             /* current sequenced flow (state)*/
 404
 405        u16 queue_map_min;
 406        u16 queue_map_max;
 407        __u32 skb_priority;     /* skb priority field */
 408        unsigned int burst;     /* number of duplicated packets to burst */
 409        int node;               /* Memory node */
 410
 411#ifdef CONFIG_XFRM
 412        __u8    ipsmode;                /* IPSEC mode (config) */
 413        __u8    ipsproto;               /* IPSEC type (config) */
 414        __u32   spi;
 415        struct xfrm_dst xdst;
 416        struct dst_ops dstops;
 417#endif
 418        char result[512];
 419};
 420
 421struct pktgen_hdr {
 422        __be32 pgh_magic;
 423        __be32 seq_num;
 424        __be32 tv_sec;
 425        __be32 tv_usec;
 426};
 427
 428
 429static unsigned int pg_net_id __read_mostly;
 430
 431struct pktgen_net {
 432        struct net              *net;
 433        struct proc_dir_entry   *proc_dir;
 434        struct list_head        pktgen_threads;
 435        bool                    pktgen_exiting;
 436};
 437
 438struct pktgen_thread {
 439        struct mutex if_lock;           /* for list of devices */
 440        struct list_head if_list;       /* All device here */
 441        struct list_head th_list;
 442        struct task_struct *tsk;
 443        char result[512];
 444
 445        /* Field for thread to receive "posted" events terminate,
 446           stop ifs etc. */
 447
 448        u32 control;
 449        int cpu;
 450
 451        wait_queue_head_t queue;
 452        struct completion start_done;
 453        struct pktgen_net *net;
 454};
 455
 456#define REMOVE 1
 457#define FIND   0
 458
 459static const char version[] =
 460        "Packet Generator for packet performance testing. "
 461        "Version: " VERSION "\n";
 462
 463static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
 464static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
 465static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
 466                                          const char *ifname, bool exact);
 467static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
 468static void pktgen_run_all_threads(struct pktgen_net *pn);
 469static void pktgen_reset_all_threads(struct pktgen_net *pn);
 470static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
 471
 472static void pktgen_stop(struct pktgen_thread *t);
 473static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
 474
 475/* Module parameters, defaults. */
 476static int pg_count_d __read_mostly = 1000;
 477static int pg_delay_d __read_mostly;
 478static int pg_clone_skb_d  __read_mostly;
 479static int debug  __read_mostly;
 480
 481static DEFINE_MUTEX(pktgen_thread_lock);
 482
 483static struct notifier_block pktgen_notifier_block = {
 484        .notifier_call = pktgen_device_event,
 485};
 486
 487/*
 488 * /proc handling functions
 489 *
 490 */
 491
 492static int pgctrl_show(struct seq_file *seq, void *v)
 493{
 494        seq_puts(seq, version);
 495        return 0;
 496}
 497
 498static ssize_t pgctrl_write(struct file *file, const char __user *buf,
 499                            size_t count, loff_t *ppos)
 500{
 501        char data[128];
 502        struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
 503
 504        if (!capable(CAP_NET_ADMIN))
 505                return -EPERM;
 506
 507        if (count == 0)
 508                return -EINVAL;
 509
 510        if (count > sizeof(data))
 511                count = sizeof(data);
 512
 513        if (copy_from_user(data, buf, count))
 514                return -EFAULT;
 515
 516        data[count - 1] = 0;    /* Strip trailing '\n' and terminate string */
 517
 518        if (!strcmp(data, "stop"))
 519                pktgen_stop_all_threads_ifs(pn);
 520
 521        else if (!strcmp(data, "start"))
 522                pktgen_run_all_threads(pn);
 523
 524        else if (!strcmp(data, "reset"))
 525                pktgen_reset_all_threads(pn);
 526
 527        else
 528                return -EINVAL;
 529
 530        return count;
 531}
 532
 533static int pgctrl_open(struct inode *inode, struct file *file)
 534{
 535        return single_open(file, pgctrl_show, PDE_DATA(inode));
 536}
 537
 538static const struct file_operations pktgen_fops = {
 539        .open    = pgctrl_open,
 540        .read    = seq_read,
 541        .llseek  = seq_lseek,
 542        .write   = pgctrl_write,
 543        .release = single_release,
 544};
 545
 546static int pktgen_if_show(struct seq_file *seq, void *v)
 547{
 548        const struct pktgen_dev *pkt_dev = seq->private;
 549        ktime_t stopped;
 550        unsigned int i;
 551        u64 idle;
 552
 553        seq_printf(seq,
 554                   "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
 555                   (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
 556                   pkt_dev->max_pkt_size);
 557
 558        seq_printf(seq,
 559                   "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
 560                   pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
 561                   pkt_dev->clone_skb, pkt_dev->odevname);
 562
 563        seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
 564                   pkt_dev->lflow);
 565
 566        seq_printf(seq,
 567                   "     queue_map_min: %u  queue_map_max: %u\n",
 568                   pkt_dev->queue_map_min,
 569                   pkt_dev->queue_map_max);
 570
 571        if (pkt_dev->skb_priority)
 572                seq_printf(seq, "     skb_priority: %u\n",
 573                           pkt_dev->skb_priority);
 574
 575        if (pkt_dev->flags & F_IPV6) {
 576                seq_printf(seq,
 577                           "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
 578                           "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
 579                           &pkt_dev->in6_saddr,
 580                           &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
 581                           &pkt_dev->in6_daddr,
 582                           &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
 583        } else {
 584                seq_printf(seq,
 585                           "     dst_min: %s  dst_max: %s\n",
 586                           pkt_dev->dst_min, pkt_dev->dst_max);
 587                seq_printf(seq,
 588                           "     src_min: %s  src_max: %s\n",
 589                           pkt_dev->src_min, pkt_dev->src_max);
 590        }
 591
 592        seq_puts(seq, "     src_mac: ");
 593
 594        seq_printf(seq, "%pM ",
 595                   is_zero_ether_addr(pkt_dev->src_mac) ?
 596                             pkt_dev->odev->dev_addr : pkt_dev->src_mac);
 597
 598        seq_puts(seq, "dst_mac: ");
 599        seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
 600
 601        seq_printf(seq,
 602                   "     udp_src_min: %d  udp_src_max: %d"
 603                   "  udp_dst_min: %d  udp_dst_max: %d\n",
 604                   pkt_dev->udp_src_min, pkt_dev->udp_src_max,
 605                   pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
 606
 607        seq_printf(seq,
 608                   "     src_mac_count: %d  dst_mac_count: %d\n",
 609                   pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
 610
 611        if (pkt_dev->nr_labels) {
 612                seq_puts(seq, "     mpls: ");
 613                for (i = 0; i < pkt_dev->nr_labels; i++)
 614                        seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
 615                                   i == pkt_dev->nr_labels-1 ? "\n" : ", ");
 616        }
 617
 618        if (pkt_dev->vlan_id != 0xffff)
 619                seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 620                           pkt_dev->vlan_id, pkt_dev->vlan_p,
 621                           pkt_dev->vlan_cfi);
 622
 623        if (pkt_dev->svlan_id != 0xffff)
 624                seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
 625                           pkt_dev->svlan_id, pkt_dev->svlan_p,
 626                           pkt_dev->svlan_cfi);
 627
 628        if (pkt_dev->tos)
 629                seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
 630
 631        if (pkt_dev->traffic_class)
 632                seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
 633
 634        if (pkt_dev->burst > 1)
 635                seq_printf(seq, "     burst: %d\n", pkt_dev->burst);
 636
 637        if (pkt_dev->node >= 0)
 638                seq_printf(seq, "     node: %d\n", pkt_dev->node);
 639
 640        if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
 641                seq_puts(seq, "     xmit_mode: netif_receive\n");
 642        else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
 643                seq_puts(seq, "     xmit_mode: xmit_queue\n");
 644
 645        seq_puts(seq, "     Flags: ");
 646
 647        for (i = 0; i < NR_PKT_FLAGS; i++) {
 648                if (i == F_FLOW_SEQ)
 649                        if (!pkt_dev->cflows)
 650                                continue;
 651
 652                if (pkt_dev->flags & (1 << i))
 653                        seq_printf(seq, "%s  ", pkt_flag_names[i]);
 654                else if (i == F_FLOW_SEQ)
 655                        seq_puts(seq, "FLOW_RND  ");
 656
 657#ifdef CONFIG_XFRM
 658                if (i == F_IPSEC && pkt_dev->spi)
 659                        seq_printf(seq, "spi:%u", pkt_dev->spi);
 660#endif
 661        }
 662
 663        seq_puts(seq, "\n");
 664
 665        /* not really stopped, more like last-running-at */
 666        stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
 667        idle = pkt_dev->idle_acc;
 668        do_div(idle, NSEC_PER_USEC);
 669
 670        seq_printf(seq,
 671                   "Current:\n     pkts-sofar: %llu  errors: %llu\n",
 672                   (unsigned long long)pkt_dev->sofar,
 673                   (unsigned long long)pkt_dev->errors);
 674
 675        seq_printf(seq,
 676                   "     started: %lluus  stopped: %lluus idle: %lluus\n",
 677                   (unsigned long long) ktime_to_us(pkt_dev->started_at),
 678                   (unsigned long long) ktime_to_us(stopped),
 679                   (unsigned long long) idle);
 680
 681        seq_printf(seq,
 682                   "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
 683                   pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
 684                   pkt_dev->cur_src_mac_offset);
 685
 686        if (pkt_dev->flags & F_IPV6) {
 687                seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
 688                                &pkt_dev->cur_in6_saddr,
 689                                &pkt_dev->cur_in6_daddr);
 690        } else
 691                seq_printf(seq, "     cur_saddr: %pI4  cur_daddr: %pI4\n",
 692                           &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
 693
 694        seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
 695                   pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
 696
 697        seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
 698
 699        seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
 700
 701        if (pkt_dev->result[0])
 702                seq_printf(seq, "Result: %s\n", pkt_dev->result);
 703        else
 704                seq_puts(seq, "Result: Idle\n");
 705
 706        return 0;
 707}
 708
 709
 710static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
 711                     __u32 *num)
 712{
 713        int i = 0;
 714        *num = 0;
 715
 716        for (; i < maxlen; i++) {
 717                int value;
 718                char c;
 719                *num <<= 4;
 720                if (get_user(c, &user_buffer[i]))
 721                        return -EFAULT;
 722                value = hex_to_bin(c);
 723                if (value >= 0)
 724                        *num |= value;
 725                else
 726                        break;
 727        }
 728        return i;
 729}
 730
 731static int count_trail_chars(const char __user * user_buffer,
 732                             unsigned int maxlen)
 733{
 734        int i;
 735
 736        for (i = 0; i < maxlen; i++) {
 737                char c;
 738                if (get_user(c, &user_buffer[i]))
 739                        return -EFAULT;
 740                switch (c) {
 741                case '\"':
 742                case '\n':
 743                case '\r':
 744                case '\t':
 745                case ' ':
 746                case '=':
 747                        break;
 748                default:
 749                        goto done;
 750                }
 751        }
 752done:
 753        return i;
 754}
 755
 756static long num_arg(const char __user *user_buffer, unsigned long maxlen,
 757                                unsigned long *num)
 758{
 759        int i;
 760        *num = 0;
 761
 762        for (i = 0; i < maxlen; i++) {
 763                char c;
 764                if (get_user(c, &user_buffer[i]))
 765                        return -EFAULT;
 766                if ((c >= '0') && (c <= '9')) {
 767                        *num *= 10;
 768                        *num += c - '0';
 769                } else
 770                        break;
 771        }
 772        return i;
 773}
 774
 775static int strn_len(const char __user * user_buffer, unsigned int maxlen)
 776{
 777        int i;
 778
 779        for (i = 0; i < maxlen; i++) {
 780                char c;
 781                if (get_user(c, &user_buffer[i]))
 782                        return -EFAULT;
 783                switch (c) {
 784                case '\"':
 785                case '\n':
 786                case '\r':
 787                case '\t':
 788                case ' ':
 789                        goto done_str;
 790                default:
 791                        break;
 792                }
 793        }
 794done_str:
 795        return i;
 796}
 797
 798static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
 799{
 800        unsigned int n = 0;
 801        char c;
 802        ssize_t i = 0;
 803        int len;
 804
 805        pkt_dev->nr_labels = 0;
 806        do {
 807                __u32 tmp;
 808                len = hex32_arg(&buffer[i], 8, &tmp);
 809                if (len <= 0)
 810                        return len;
 811                pkt_dev->labels[n] = htonl(tmp);
 812                if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
 813                        pkt_dev->flags |= F_MPLS_RND;
 814                i += len;
 815                if (get_user(c, &buffer[i]))
 816                        return -EFAULT;
 817                i++;
 818                n++;
 819                if (n >= MAX_MPLS_LABELS)
 820                        return -E2BIG;
 821        } while (c == ',');
 822
 823        pkt_dev->nr_labels = n;
 824        return i;
 825}
 826
 827static __u32 pktgen_read_flag(const char *f, bool *disable)
 828{
 829        __u32 i;
 830
 831        if (f[0] == '!') {
 832                *disable = true;
 833                f++;
 834        }
 835
 836        for (i = 0; i < NR_PKT_FLAGS; i++) {
 837                if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
 838                        continue;
 839
 840                /* allow only disabling ipv6 flag */
 841                if (!*disable && i == IPV6_SHIFT)
 842                        continue;
 843
 844                if (strcmp(f, pkt_flag_names[i]) == 0)
 845                        return 1 << i;
 846        }
 847
 848        if (strcmp(f, "FLOW_RND") == 0) {
 849                *disable = !*disable;
 850                return F_FLOW_SEQ;
 851        }
 852
 853        return 0;
 854}
 855
 856static ssize_t pktgen_if_write(struct file *file,
 857                               const char __user * user_buffer, size_t count,
 858                               loff_t * offset)
 859{
 860        struct seq_file *seq = file->private_data;
 861        struct pktgen_dev *pkt_dev = seq->private;
 862        int i, max, len;
 863        char name[16], valstr[32];
 864        unsigned long value = 0;
 865        char *pg_result = NULL;
 866        int tmp = 0;
 867        char buf[128];
 868
 869        pg_result = &(pkt_dev->result[0]);
 870
 871        if (count < 1) {
 872                pr_warn("wrong command format\n");
 873                return -EINVAL;
 874        }
 875
 876        max = count;
 877        tmp = count_trail_chars(user_buffer, max);
 878        if (tmp < 0) {
 879                pr_warn("illegal format\n");
 880                return tmp;
 881        }
 882        i = tmp;
 883
 884        /* Read variable name */
 885
 886        len = strn_len(&user_buffer[i], sizeof(name) - 1);
 887        if (len < 0)
 888                return len;
 889
 890        memset(name, 0, sizeof(name));
 891        if (copy_from_user(name, &user_buffer[i], len))
 892                return -EFAULT;
 893        i += len;
 894
 895        max = count - i;
 896        len = count_trail_chars(&user_buffer[i], max);
 897        if (len < 0)
 898                return len;
 899
 900        i += len;
 901
 902        if (debug) {
 903                size_t copy = min_t(size_t, count + 1, 1024);
 904                char *tp = strndup_user(user_buffer, copy);
 905
 906                if (IS_ERR(tp))
 907                        return PTR_ERR(tp);
 908
 909                pr_debug("%s,%zu  buffer -:%s:-\n", name, count, tp);
 910                kfree(tp);
 911        }
 912
 913        if (!strcmp(name, "min_pkt_size")) {
 914                len = num_arg(&user_buffer[i], 10, &value);
 915                if (len < 0)
 916                        return len;
 917
 918                i += len;
 919                if (value < 14 + 20 + 8)
 920                        value = 14 + 20 + 8;
 921                if (value != pkt_dev->min_pkt_size) {
 922                        pkt_dev->min_pkt_size = value;
 923                        pkt_dev->cur_pkt_size = value;
 924                }
 925                sprintf(pg_result, "OK: min_pkt_size=%u",
 926                        pkt_dev->min_pkt_size);
 927                return count;
 928        }
 929
 930        if (!strcmp(name, "max_pkt_size")) {
 931                len = num_arg(&user_buffer[i], 10, &value);
 932                if (len < 0)
 933                        return len;
 934
 935                i += len;
 936                if (value < 14 + 20 + 8)
 937                        value = 14 + 20 + 8;
 938                if (value != pkt_dev->max_pkt_size) {
 939                        pkt_dev->max_pkt_size = value;
 940                        pkt_dev->cur_pkt_size = value;
 941                }
 942                sprintf(pg_result, "OK: max_pkt_size=%u",
 943                        pkt_dev->max_pkt_size);
 944                return count;
 945        }
 946
 947        /* Shortcut for min = max */
 948
 949        if (!strcmp(name, "pkt_size")) {
 950                len = num_arg(&user_buffer[i], 10, &value);
 951                if (len < 0)
 952                        return len;
 953
 954                i += len;
 955                if (value < 14 + 20 + 8)
 956                        value = 14 + 20 + 8;
 957                if (value != pkt_dev->min_pkt_size) {
 958                        pkt_dev->min_pkt_size = value;
 959                        pkt_dev->max_pkt_size = value;
 960                        pkt_dev->cur_pkt_size = value;
 961                }
 962                sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
 963                return count;
 964        }
 965
 966        if (!strcmp(name, "debug")) {
 967                len = num_arg(&user_buffer[i], 10, &value);
 968                if (len < 0)
 969                        return len;
 970
 971                i += len;
 972                debug = value;
 973                sprintf(pg_result, "OK: debug=%u", debug);
 974                return count;
 975        }
 976
 977        if (!strcmp(name, "frags")) {
 978                len = num_arg(&user_buffer[i], 10, &value);
 979                if (len < 0)
 980                        return len;
 981
 982                i += len;
 983                pkt_dev->nfrags = value;
 984                sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
 985                return count;
 986        }
 987        if (!strcmp(name, "delay")) {
 988                len = num_arg(&user_buffer[i], 10, &value);
 989                if (len < 0)
 990                        return len;
 991
 992                i += len;
 993                if (value == 0x7FFFFFFF)
 994                        pkt_dev->delay = ULLONG_MAX;
 995                else
 996                        pkt_dev->delay = (u64)value;
 997
 998                sprintf(pg_result, "OK: delay=%llu",
 999                        (unsigned long long) pkt_dev->delay);
1000                return count;
1001        }
1002        if (!strcmp(name, "rate")) {
1003                len = num_arg(&user_buffer[i], 10, &value);
1004                if (len < 0)
1005                        return len;
1006
1007                i += len;
1008                if (!value)
1009                        return len;
1010                pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1011                if (debug)
1012                        pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013
1014                sprintf(pg_result, "OK: rate=%lu", value);
1015                return count;
1016        }
1017        if (!strcmp(name, "ratep")) {
1018                len = num_arg(&user_buffer[i], 10, &value);
1019                if (len < 0)
1020                        return len;
1021
1022                i += len;
1023                if (!value)
1024                        return len;
1025                pkt_dev->delay = NSEC_PER_SEC/value;
1026                if (debug)
1027                        pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1028
1029                sprintf(pg_result, "OK: rate=%lu", value);
1030                return count;
1031        }
1032        if (!strcmp(name, "udp_src_min")) {
1033                len = num_arg(&user_buffer[i], 10, &value);
1034                if (len < 0)
1035                        return len;
1036
1037                i += len;
1038                if (value != pkt_dev->udp_src_min) {
1039                        pkt_dev->udp_src_min = value;
1040                        pkt_dev->cur_udp_src = value;
1041                }
1042                sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1043                return count;
1044        }
1045        if (!strcmp(name, "udp_dst_min")) {
1046                len = num_arg(&user_buffer[i], 10, &value);
1047                if (len < 0)
1048                        return len;
1049
1050                i += len;
1051                if (value != pkt_dev->udp_dst_min) {
1052                        pkt_dev->udp_dst_min = value;
1053                        pkt_dev->cur_udp_dst = value;
1054                }
1055                sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1056                return count;
1057        }
1058        if (!strcmp(name, "udp_src_max")) {
1059                len = num_arg(&user_buffer[i], 10, &value);
1060                if (len < 0)
1061                        return len;
1062
1063                i += len;
1064                if (value != pkt_dev->udp_src_max) {
1065                        pkt_dev->udp_src_max = value;
1066                        pkt_dev->cur_udp_src = value;
1067                }
1068                sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1069                return count;
1070        }
1071        if (!strcmp(name, "udp_dst_max")) {
1072                len = num_arg(&user_buffer[i], 10, &value);
1073                if (len < 0)
1074                        return len;
1075
1076                i += len;
1077                if (value != pkt_dev->udp_dst_max) {
1078                        pkt_dev->udp_dst_max = value;
1079                        pkt_dev->cur_udp_dst = value;
1080                }
1081                sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1082                return count;
1083        }
1084        if (!strcmp(name, "clone_skb")) {
1085                len = num_arg(&user_buffer[i], 10, &value);
1086                if (len < 0)
1087                        return len;
1088                if ((value > 0) &&
1089                    ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1090                     !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1091                        return -ENOTSUPP;
1092                i += len;
1093                pkt_dev->clone_skb = value;
1094
1095                sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1096                return count;
1097        }
1098        if (!strcmp(name, "count")) {
1099                len = num_arg(&user_buffer[i], 10, &value);
1100                if (len < 0)
1101                        return len;
1102
1103                i += len;
1104                pkt_dev->count = value;
1105                sprintf(pg_result, "OK: count=%llu",
1106                        (unsigned long long)pkt_dev->count);
1107                return count;
1108        }
1109        if (!strcmp(name, "src_mac_count")) {
1110                len = num_arg(&user_buffer[i], 10, &value);
1111                if (len < 0)
1112                        return len;
1113
1114                i += len;
1115                if (pkt_dev->src_mac_count != value) {
1116                        pkt_dev->src_mac_count = value;
1117                        pkt_dev->cur_src_mac_offset = 0;
1118                }
1119                sprintf(pg_result, "OK: src_mac_count=%d",
1120                        pkt_dev->src_mac_count);
1121                return count;
1122        }
1123        if (!strcmp(name, "dst_mac_count")) {
1124                len = num_arg(&user_buffer[i], 10, &value);
1125                if (len < 0)
1126                        return len;
1127
1128                i += len;
1129                if (pkt_dev->dst_mac_count != value) {
1130                        pkt_dev->dst_mac_count = value;
1131                        pkt_dev->cur_dst_mac_offset = 0;
1132                }
1133                sprintf(pg_result, "OK: dst_mac_count=%d",
1134                        pkt_dev->dst_mac_count);
1135                return count;
1136        }
1137        if (!strcmp(name, "burst")) {
1138                len = num_arg(&user_buffer[i], 10, &value);
1139                if (len < 0)
1140                        return len;
1141
1142                i += len;
1143                if ((value > 1) &&
1144                    ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1145                     ((pkt_dev->xmit_mode == M_START_XMIT) &&
1146                     (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
1147                        return -ENOTSUPP;
1148                pkt_dev->burst = value < 1 ? 1 : value;
1149                sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1150                return count;
1151        }
1152        if (!strcmp(name, "node")) {
1153                len = num_arg(&user_buffer[i], 10, &value);
1154                if (len < 0)
1155                        return len;
1156
1157                i += len;
1158
1159                if (node_possible(value)) {
1160                        pkt_dev->node = value;
1161                        sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1162                        if (pkt_dev->page) {
1163                                put_page(pkt_dev->page);
1164                                pkt_dev->page = NULL;
1165                        }
1166                }
1167                else
1168                        sprintf(pg_result, "ERROR: node not possible");
1169                return count;
1170        }
1171        if (!strcmp(name, "xmit_mode")) {
1172                char f[32];
1173
1174                memset(f, 0, 32);
1175                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1176                if (len < 0)
1177                        return len;
1178
1179                if (copy_from_user(f, &user_buffer[i], len))
1180                        return -EFAULT;
1181                i += len;
1182
1183                if (strcmp(f, "start_xmit") == 0) {
1184                        pkt_dev->xmit_mode = M_START_XMIT;
1185                } else if (strcmp(f, "netif_receive") == 0) {
1186                        /* clone_skb set earlier, not supported in this mode */
1187                        if (pkt_dev->clone_skb > 0)
1188                                return -ENOTSUPP;
1189
1190                        pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1191
1192                        /* make sure new packet is allocated every time
1193                         * pktgen_xmit() is called
1194                         */
1195                        pkt_dev->last_ok = 1;
1196
1197                        /* override clone_skb if user passed default value
1198                         * at module loading time
1199                         */
1200                        pkt_dev->clone_skb = 0;
1201                } else if (strcmp(f, "queue_xmit") == 0) {
1202                        pkt_dev->xmit_mode = M_QUEUE_XMIT;
1203                        pkt_dev->last_ok = 1;
1204                } else {
1205                        sprintf(pg_result,
1206                                "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1207                                f, "start_xmit, netif_receive\n");
1208                        return count;
1209                }
1210                sprintf(pg_result, "OK: xmit_mode=%s", f);
1211                return count;
1212        }
1213        if (!strcmp(name, "flag")) {
1214                __u32 flag;
1215                char f[32];
1216                bool disable = false;
1217
1218                memset(f, 0, 32);
1219                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1220                if (len < 0)
1221                        return len;
1222
1223                if (copy_from_user(f, &user_buffer[i], len))
1224                        return -EFAULT;
1225                i += len;
1226
1227                flag = pktgen_read_flag(f, &disable);
1228
1229                if (flag) {
1230                        if (disable)
1231                                pkt_dev->flags &= ~flag;
1232                        else
1233                                pkt_dev->flags |= flag;
1234                } else {
1235                        sprintf(pg_result,
1236                                "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1237                                f,
1238                                "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1239                                "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1240                                "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1241                                "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1242                                "NO_TIMESTAMP, "
1243#ifdef CONFIG_XFRM
1244                                "IPSEC, "
1245#endif
1246                                "NODE_ALLOC\n");
1247                        return count;
1248                }
1249                sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1250                return count;
1251        }
1252        if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1253                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1254                if (len < 0)
1255                        return len;
1256
1257                if (copy_from_user(buf, &user_buffer[i], len))
1258                        return -EFAULT;
1259                buf[len] = 0;
1260                if (strcmp(buf, pkt_dev->dst_min) != 0) {
1261                        memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1262                        strcpy(pkt_dev->dst_min, buf);
1263                        pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1264                        pkt_dev->cur_daddr = pkt_dev->daddr_min;
1265                }
1266                if (debug)
1267                        pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1268                i += len;
1269                sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1270                return count;
1271        }
1272        if (!strcmp(name, "dst_max")) {
1273                len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1274                if (len < 0)
1275                        return len;
1276
1277                if (copy_from_user(buf, &user_buffer[i], len))
1278                        return -EFAULT;
1279                buf[len] = 0;
1280                if (strcmp(buf, pkt_dev->dst_max) != 0) {
1281                        memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1282                        strcpy(pkt_dev->dst_max, buf);
1283                        pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1284                        pkt_dev->cur_daddr = pkt_dev->daddr_max;
1285                }
1286                if (debug)
1287                        pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1288                i += len;
1289                sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1290                return count;
1291        }
1292        if (!strcmp(name, "dst6")) {
1293                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1294                if (len < 0)
1295                        return len;
1296
1297                pkt_dev->flags |= F_IPV6;
1298
1299                if (copy_from_user(buf, &user_buffer[i], len))
1300                        return -EFAULT;
1301                buf[len] = 0;
1302
1303                in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1304                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1305
1306                pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1307
1308                if (debug)
1309                        pr_debug("dst6 set to: %s\n", buf);
1310
1311                i += len;
1312                sprintf(pg_result, "OK: dst6=%s", buf);
1313                return count;
1314        }
1315        if (!strcmp(name, "dst6_min")) {
1316                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1317                if (len < 0)
1318                        return len;
1319
1320                pkt_dev->flags |= F_IPV6;
1321
1322                if (copy_from_user(buf, &user_buffer[i], len))
1323                        return -EFAULT;
1324                buf[len] = 0;
1325
1326                in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1327                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1328
1329                pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1330                if (debug)
1331                        pr_debug("dst6_min set to: %s\n", buf);
1332
1333                i += len;
1334                sprintf(pg_result, "OK: dst6_min=%s", buf);
1335                return count;
1336        }
1337        if (!strcmp(name, "dst6_max")) {
1338                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1339                if (len < 0)
1340                        return len;
1341
1342                pkt_dev->flags |= F_IPV6;
1343
1344                if (copy_from_user(buf, &user_buffer[i], len))
1345                        return -EFAULT;
1346                buf[len] = 0;
1347
1348                in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1349                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1350
1351                if (debug)
1352                        pr_debug("dst6_max set to: %s\n", buf);
1353
1354                i += len;
1355                sprintf(pg_result, "OK: dst6_max=%s", buf);
1356                return count;
1357        }
1358        if (!strcmp(name, "src6")) {
1359                len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1360                if (len < 0)
1361                        return len;
1362
1363                pkt_dev->flags |= F_IPV6;
1364
1365                if (copy_from_user(buf, &user_buffer[i], len))
1366                        return -EFAULT;
1367                buf[len] = 0;
1368
1369                in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1370                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1371
1372                pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1373
1374                if (debug)
1375                        pr_debug("src6 set to: %s\n", buf);
1376
1377                i += len;
1378                sprintf(pg_result, "OK: src6=%s", buf);
1379                return count;
1380        }
1381        if (!strcmp(name, "src_min")) {
1382                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1383                if (len < 0)
1384                        return len;
1385
1386                if (copy_from_user(buf, &user_buffer[i], len))
1387                        return -EFAULT;
1388                buf[len] = 0;
1389                if (strcmp(buf, pkt_dev->src_min) != 0) {
1390                        memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1391                        strcpy(pkt_dev->src_min, buf);
1392                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1393                        pkt_dev->cur_saddr = pkt_dev->saddr_min;
1394                }
1395                if (debug)
1396                        pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1397                i += len;
1398                sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1399                return count;
1400        }
1401        if (!strcmp(name, "src_max")) {
1402                len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1403                if (len < 0)
1404                        return len;
1405
1406                if (copy_from_user(buf, &user_buffer[i], len))
1407                        return -EFAULT;
1408                buf[len] = 0;
1409                if (strcmp(buf, pkt_dev->src_max) != 0) {
1410                        memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1411                        strcpy(pkt_dev->src_max, buf);
1412                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1413                        pkt_dev->cur_saddr = pkt_dev->saddr_max;
1414                }
1415                if (debug)
1416                        pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1417                i += len;
1418                sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1419                return count;
1420        }
1421        if (!strcmp(name, "dst_mac")) {
1422                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1423                if (len < 0)
1424                        return len;
1425
1426                memset(valstr, 0, sizeof(valstr));
1427                if (copy_from_user(valstr, &user_buffer[i], len))
1428                        return -EFAULT;
1429
1430                if (!mac_pton(valstr, pkt_dev->dst_mac))
1431                        return -EINVAL;
1432                /* Set up Dest MAC */
1433                ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1434
1435                sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1436                return count;
1437        }
1438        if (!strcmp(name, "src_mac")) {
1439                len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1440                if (len < 0)
1441                        return len;
1442
1443                memset(valstr, 0, sizeof(valstr));
1444                if (copy_from_user(valstr, &user_buffer[i], len))
1445                        return -EFAULT;
1446
1447                if (!mac_pton(valstr, pkt_dev->src_mac))
1448                        return -EINVAL;
1449                /* Set up Src MAC */
1450                ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1451
1452                sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1453                return count;
1454        }
1455
1456        if (!strcmp(name, "clear_counters")) {
1457                pktgen_clear_counters(pkt_dev);
1458                sprintf(pg_result, "OK: Clearing counters.\n");
1459                return count;
1460        }
1461
1462        if (!strcmp(name, "flows")) {
1463                len = num_arg(&user_buffer[i], 10, &value);
1464                if (len < 0)
1465                        return len;
1466
1467                i += len;
1468                if (value > MAX_CFLOWS)
1469                        value = MAX_CFLOWS;
1470
1471                pkt_dev->cflows = value;
1472                sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1473                return count;
1474        }
1475#ifdef CONFIG_XFRM
1476        if (!strcmp(name, "spi")) {
1477                len = num_arg(&user_buffer[i], 10, &value);
1478                if (len < 0)
1479                        return len;
1480
1481                i += len;
1482                pkt_dev->spi = value;
1483                sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1484                return count;
1485        }
1486#endif
1487        if (!strcmp(name, "flowlen")) {
1488                len = num_arg(&user_buffer[i], 10, &value);
1489                if (len < 0)
1490                        return len;
1491
1492                i += len;
1493                pkt_dev->lflow = value;
1494                sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1495                return count;
1496        }
1497
1498        if (!strcmp(name, "queue_map_min")) {
1499                len = num_arg(&user_buffer[i], 5, &value);
1500                if (len < 0)
1501                        return len;
1502
1503                i += len;
1504                pkt_dev->queue_map_min = value;
1505                sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1506                return count;
1507        }
1508
1509        if (!strcmp(name, "queue_map_max")) {
1510                len = num_arg(&user_buffer[i], 5, &value);
1511                if (len < 0)
1512                        return len;
1513
1514                i += len;
1515                pkt_dev->queue_map_max = value;
1516                sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1517                return count;
1518        }
1519
1520        if (!strcmp(name, "mpls")) {
1521                unsigned int n, cnt;
1522
1523                len = get_labels(&user_buffer[i], pkt_dev);
1524                if (len < 0)
1525                        return len;
1526                i += len;
1527                cnt = sprintf(pg_result, "OK: mpls=");
1528                for (n = 0; n < pkt_dev->nr_labels; n++)
1529                        cnt += sprintf(pg_result + cnt,
1530                                       "%08x%s", ntohl(pkt_dev->labels[n]),
1531                                       n == pkt_dev->nr_labels-1 ? "" : ",");
1532
1533                if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1534                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1535                        pkt_dev->svlan_id = 0xffff;
1536
1537                        if (debug)
1538                                pr_debug("VLAN/SVLAN auto turned off\n");
1539                }
1540                return count;
1541        }
1542
1543        if (!strcmp(name, "vlan_id")) {
1544                len = num_arg(&user_buffer[i], 4, &value);
1545                if (len < 0)
1546                        return len;
1547
1548                i += len;
1549                if (value <= 4095) {
1550                        pkt_dev->vlan_id = value;  /* turn on VLAN */
1551
1552                        if (debug)
1553                                pr_debug("VLAN turned on\n");
1554
1555                        if (debug && pkt_dev->nr_labels)
1556                                pr_debug("MPLS auto turned off\n");
1557
1558                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1559                        sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1560                } else {
1561                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1562                        pkt_dev->svlan_id = 0xffff;
1563
1564                        if (debug)
1565                                pr_debug("VLAN/SVLAN turned off\n");
1566                }
1567                return count;
1568        }
1569
1570        if (!strcmp(name, "vlan_p")) {
1571                len = num_arg(&user_buffer[i], 1, &value);
1572                if (len < 0)
1573                        return len;
1574
1575                i += len;
1576                if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1577                        pkt_dev->vlan_p = value;
1578                        sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1579                } else {
1580                        sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1581                }
1582                return count;
1583        }
1584
1585        if (!strcmp(name, "vlan_cfi")) {
1586                len = num_arg(&user_buffer[i], 1, &value);
1587                if (len < 0)
1588                        return len;
1589
1590                i += len;
1591                if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1592                        pkt_dev->vlan_cfi = value;
1593                        sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1594                } else {
1595                        sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1596                }
1597                return count;
1598        }
1599
1600        if (!strcmp(name, "svlan_id")) {
1601                len = num_arg(&user_buffer[i], 4, &value);
1602                if (len < 0)
1603                        return len;
1604
1605                i += len;
1606                if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1607                        pkt_dev->svlan_id = value;  /* turn on SVLAN */
1608
1609                        if (debug)
1610                                pr_debug("SVLAN turned on\n");
1611
1612                        if (debug && pkt_dev->nr_labels)
1613                                pr_debug("MPLS auto turned off\n");
1614
1615                        pkt_dev->nr_labels = 0;    /* turn off MPLS */
1616                        sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1617                } else {
1618                        pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1619                        pkt_dev->svlan_id = 0xffff;
1620
1621                        if (debug)
1622                                pr_debug("VLAN/SVLAN turned off\n");
1623                }
1624                return count;
1625        }
1626
1627        if (!strcmp(name, "svlan_p")) {
1628                len = num_arg(&user_buffer[i], 1, &value);
1629                if (len < 0)
1630                        return len;
1631
1632                i += len;
1633                if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1634                        pkt_dev->svlan_p = value;
1635                        sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1636                } else {
1637                        sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1638                }
1639                return count;
1640        }
1641
1642        if (!strcmp(name, "svlan_cfi")) {
1643                len = num_arg(&user_buffer[i], 1, &value);
1644                if (len < 0)
1645                        return len;
1646
1647                i += len;
1648                if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1649                        pkt_dev->svlan_cfi = value;
1650                        sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1651                } else {
1652                        sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1653                }
1654                return count;
1655        }
1656
1657        if (!strcmp(name, "tos")) {
1658                __u32 tmp_value = 0;
1659                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1660                if (len < 0)
1661                        return len;
1662
1663                i += len;
1664                if (len == 2) {
1665                        pkt_dev->tos = tmp_value;
1666                        sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1667                } else {
1668                        sprintf(pg_result, "ERROR: tos must be 00-ff");
1669                }
1670                return count;
1671        }
1672
1673        if (!strcmp(name, "traffic_class")) {
1674                __u32 tmp_value = 0;
1675                len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1676                if (len < 0)
1677                        return len;
1678
1679                i += len;
1680                if (len == 2) {
1681                        pkt_dev->traffic_class = tmp_value;
1682                        sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1683                } else {
1684                        sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1685                }
1686                return count;
1687        }
1688
1689        if (!strcmp(name, "skb_priority")) {
1690                len = num_arg(&user_buffer[i], 9, &value);
1691                if (len < 0)
1692                        return len;
1693
1694                i += len;
1695                pkt_dev->skb_priority = value;
1696                sprintf(pg_result, "OK: skb_priority=%i",
1697                        pkt_dev->skb_priority);
1698                return count;
1699        }
1700
1701        sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1702        return -EINVAL;
1703}
1704
1705static int pktgen_if_open(struct inode *inode, struct file *file)
1706{
1707        return single_open(file, pktgen_if_show, PDE_DATA(inode));
1708}
1709
1710static const struct file_operations pktgen_if_fops = {
1711        .open    = pktgen_if_open,
1712        .read    = seq_read,
1713        .llseek  = seq_lseek,
1714        .write   = pktgen_if_write,
1715        .release = single_release,
1716};
1717
1718static int pktgen_thread_show(struct seq_file *seq, void *v)
1719{
1720        struct pktgen_thread *t = seq->private;
1721        const struct pktgen_dev *pkt_dev;
1722
1723        BUG_ON(!t);
1724
1725        seq_puts(seq, "Running: ");
1726
1727        rcu_read_lock();
1728        list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1729                if (pkt_dev->running)
1730                        seq_printf(seq, "%s ", pkt_dev->odevname);
1731
1732        seq_puts(seq, "\nStopped: ");
1733
1734        list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1735                if (!pkt_dev->running)
1736                        seq_printf(seq, "%s ", pkt_dev->odevname);
1737
1738        if (t->result[0])
1739                seq_printf(seq, "\nResult: %s\n", t->result);
1740        else
1741                seq_puts(seq, "\nResult: NA\n");
1742
1743        rcu_read_unlock();
1744
1745        return 0;
1746}
1747
1748static ssize_t pktgen_thread_write(struct file *file,
1749                                   const char __user * user_buffer,
1750                                   size_t count, loff_t * offset)
1751{
1752        struct seq_file *seq = file->private_data;
1753        struct pktgen_thread *t = seq->private;
1754        int i, max, len, ret;
1755        char name[40];
1756        char *pg_result;
1757
1758        if (count < 1) {
1759                //      sprintf(pg_result, "Wrong command format");
1760                return -EINVAL;
1761        }
1762
1763        max = count;
1764        len = count_trail_chars(user_buffer, max);
1765        if (len < 0)
1766                return len;
1767
1768        i = len;
1769
1770        /* Read variable name */
1771
1772        len = strn_len(&user_buffer[i], sizeof(name) - 1);
1773        if (len < 0)
1774                return len;
1775
1776        memset(name, 0, sizeof(name));
1777        if (copy_from_user(name, &user_buffer[i], len))
1778                return -EFAULT;
1779        i += len;
1780
1781        max = count - i;
1782        len = count_trail_chars(&user_buffer[i], max);
1783        if (len < 0)
1784                return len;
1785
1786        i += len;
1787
1788        if (debug)
1789                pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1790
1791        if (!t) {
1792                pr_err("ERROR: No thread\n");
1793                ret = -EINVAL;
1794                goto out;
1795        }
1796
1797        pg_result = &(t->result[0]);
1798
1799        if (!strcmp(name, "add_device")) {
1800                char f[32];
1801                memset(f, 0, 32);
1802                len = strn_len(&user_buffer[i], sizeof(f) - 1);
1803                if (len < 0) {
1804                        ret = len;
1805                        goto out;
1806                }
1807                if (copy_from_user(f, &user_buffer[i], len))
1808                        return -EFAULT;
1809                i += len;
1810                mutex_lock(&pktgen_thread_lock);
1811                ret = pktgen_add_device(t, f);
1812                mutex_unlock(&pktgen_thread_lock);
1813                if (!ret) {
1814                        ret = count;
1815                        sprintf(pg_result, "OK: add_device=%s", f);
1816                } else
1817                        sprintf(pg_result, "ERROR: can not add device %s", f);
1818                goto out;
1819        }
1820
1821        if (!strcmp(name, "rem_device_all")) {
1822                mutex_lock(&pktgen_thread_lock);
1823                t->control |= T_REMDEVALL;
1824                mutex_unlock(&pktgen_thread_lock);
1825                schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1826                ret = count;
1827                sprintf(pg_result, "OK: rem_device_all");
1828                goto out;
1829        }
1830
1831        if (!strcmp(name, "max_before_softirq")) {
1832                sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1833                ret = count;
1834                goto out;
1835        }
1836
1837        ret = -EINVAL;
1838out:
1839        return ret;
1840}
1841
1842static int pktgen_thread_open(struct inode *inode, struct file *file)
1843{
1844        return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1845}
1846
1847static const struct file_operations pktgen_thread_fops = {
1848        .open    = pktgen_thread_open,
1849        .read    = seq_read,
1850        .llseek  = seq_lseek,
1851        .write   = pktgen_thread_write,
1852        .release = single_release,
1853};
1854
1855/* Think find or remove for NN */
1856static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1857                                              const char *ifname, int remove)
1858{
1859        struct pktgen_thread *t;
1860        struct pktgen_dev *pkt_dev = NULL;
1861        bool exact = (remove == FIND);
1862
1863        list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1864                pkt_dev = pktgen_find_dev(t, ifname, exact);
1865                if (pkt_dev) {
1866                        if (remove) {
1867                                pkt_dev->removal_mark = 1;
1868                                t->control |= T_REMDEV;
1869                        }
1870                        break;
1871                }
1872        }
1873        return pkt_dev;
1874}
1875
1876/*
1877 * mark a device for removal
1878 */
1879static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1880{
1881        struct pktgen_dev *pkt_dev = NULL;
1882        const int max_tries = 10, msec_per_try = 125;
1883        int i = 0;
1884
1885        mutex_lock(&pktgen_thread_lock);
1886        pr_debug("%s: marking %s for removal\n", __func__, ifname);
1887
1888        while (1) {
1889
1890                pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1891                if (pkt_dev == NULL)
1892                        break;  /* success */
1893
1894                mutex_unlock(&pktgen_thread_lock);
1895                pr_debug("%s: waiting for %s to disappear....\n",
1896                         __func__, ifname);
1897                schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1898                mutex_lock(&pktgen_thread_lock);
1899
1900                if (++i >= max_tries) {
1901                        pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1902                               __func__, msec_per_try * i, ifname);
1903                        break;
1904                }
1905
1906        }
1907
1908        mutex_unlock(&pktgen_thread_lock);
1909}
1910
1911static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1912{
1913        struct pktgen_thread *t;
1914
1915        mutex_lock(&pktgen_thread_lock);
1916
1917        list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1918                struct pktgen_dev *pkt_dev;
1919
1920                if_lock(t);
1921                list_for_each_entry(pkt_dev, &t->if_list, list) {
1922                        if (pkt_dev->odev != dev)
1923                                continue;
1924
1925                        proc_remove(pkt_dev->entry);
1926
1927                        pkt_dev->entry = proc_create_data(dev->name, 0600,
1928                                                          pn->proc_dir,
1929                                                          &pktgen_if_fops,
1930                                                          pkt_dev);
1931                        if (!pkt_dev->entry)
1932                                pr_err("can't move proc entry for '%s'\n",
1933                                       dev->name);
1934                        break;
1935                }
1936                if_unlock(t);
1937        }
1938        mutex_unlock(&pktgen_thread_lock);
1939}
1940
1941static int pktgen_device_event(struct notifier_block *unused,
1942                               unsigned long event, void *ptr)
1943{
1944        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1945        struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1946
1947        if (pn->pktgen_exiting)
1948                return NOTIFY_DONE;
1949
1950        /* It is OK that we do not hold the group lock right now,
1951         * as we run under the RTNL lock.
1952         */
1953
1954        switch (event) {
1955        case NETDEV_CHANGENAME:
1956                pktgen_change_name(pn, dev);
1957                break;
1958
1959        case NETDEV_UNREGISTER:
1960                pktgen_mark_device(pn, dev->name);
1961                break;
1962        }
1963
1964        return NOTIFY_DONE;
1965}
1966
1967static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1968                                                 struct pktgen_dev *pkt_dev,
1969                                                 const char *ifname)
1970{
1971        char b[IFNAMSIZ+5];
1972        int i;
1973
1974        for (i = 0; ifname[i] != '@'; i++) {
1975                if (i == IFNAMSIZ)
1976                        break;
1977
1978                b[i] = ifname[i];
1979        }
1980        b[i] = 0;
1981
1982        return dev_get_by_name(pn->net, b);
1983}
1984
1985
1986/* Associate pktgen_dev with a device. */
1987
1988static int pktgen_setup_dev(const struct pktgen_net *pn,
1989                            struct pktgen_dev *pkt_dev, const char *ifname)
1990{
1991        struct net_device *odev;
1992        int err;
1993
1994        /* Clean old setups */
1995        if (pkt_dev->odev) {
1996                dev_put(pkt_dev->odev);
1997                pkt_dev->odev = NULL;
1998        }
1999
2000        odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2001        if (!odev) {
2002                pr_err("no such netdevice: \"%s\"\n", ifname);
2003                return -ENODEV;
2004        }
2005
2006        if (odev->type != ARPHRD_ETHER) {
2007                pr_err("not an ethernet device: \"%s\"\n", ifname);
2008                err = -EINVAL;
2009        } else if (!netif_running(odev)) {
2010                pr_err("device is down: \"%s\"\n", ifname);
2011                err = -ENETDOWN;
2012        } else {
2013                pkt_dev->odev = odev;
2014                return 0;
2015        }
2016
2017        dev_put(odev);
2018        return err;
2019}
2020
2021/* Read pkt_dev from the interface and set up internal pktgen_dev
2022 * structure to have the right information to create/send packets
2023 */
2024static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2025{
2026        int ntxq;
2027
2028        if (!pkt_dev->odev) {
2029                pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2030                sprintf(pkt_dev->result,
2031                        "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2032                return;
2033        }
2034
2035        /* make sure that we don't pick a non-existing transmit queue */
2036        ntxq = pkt_dev->odev->real_num_tx_queues;
2037
2038        if (ntxq <= pkt_dev->queue_map_min) {
2039                pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2040                        pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2041                        pkt_dev->odevname);
2042                pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2043        }
2044        if (pkt_dev->queue_map_max >= ntxq) {
2045                pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2046                        pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2047                        pkt_dev->odevname);
2048                pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2049        }
2050
2051        /* Default to the interface's mac if not explicitly set. */
2052
2053        if (is_zero_ether_addr(pkt_dev->src_mac))
2054                ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2055
2056        /* Set up Dest MAC */
2057        ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2058
2059        if (pkt_dev->flags & F_IPV6) {
2060                int i, set = 0, err = 1;
2061                struct inet6_dev *idev;
2062
2063                if (pkt_dev->min_pkt_size == 0) {
2064                        pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2065                                                + sizeof(struct udphdr)
2066                                                + sizeof(struct pktgen_hdr)
2067                                                + pkt_dev->pkt_overhead;
2068                }
2069
2070                for (i = 0; i < sizeof(struct in6_addr); i++)
2071                        if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2072                                set = 1;
2073                                break;
2074                        }
2075
2076                if (!set) {
2077
2078                        /*
2079                         * Use linklevel address if unconfigured.
2080                         *
2081                         * use ipv6_get_lladdr if/when it's get exported
2082                         */
2083
2084                        rcu_read_lock();
2085                        idev = __in6_dev_get(pkt_dev->odev);
2086                        if (idev) {
2087                                struct inet6_ifaddr *ifp;
2088
2089                                read_lock_bh(&idev->lock);
2090                                list_for_each_entry(ifp, &idev->addr_list, if_list) {
2091                                        if ((ifp->scope & IFA_LINK) &&
2092                                            !(ifp->flags & IFA_F_TENTATIVE)) {
2093                                                pkt_dev->cur_in6_saddr = ifp->addr;
2094                                                err = 0;
2095                                                break;
2096                                        }
2097                                }
2098                                read_unlock_bh(&idev->lock);
2099                        }
2100                        rcu_read_unlock();
2101                        if (err)
2102                                pr_err("ERROR: IPv6 link address not available\n");
2103                }
2104        } else {
2105                if (pkt_dev->min_pkt_size == 0) {
2106                        pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2107                                                + sizeof(struct udphdr)
2108                                                + sizeof(struct pktgen_hdr)
2109                                                + pkt_dev->pkt_overhead;
2110                }
2111
2112                pkt_dev->saddr_min = 0;
2113                pkt_dev->saddr_max = 0;
2114                if (strlen(pkt_dev->src_min) == 0) {
2115
2116                        struct in_device *in_dev;
2117
2118                        rcu_read_lock();
2119                        in_dev = __in_dev_get_rcu(pkt_dev->odev);
2120                        if (in_dev) {
2121                                const struct in_ifaddr *ifa;
2122
2123                                ifa = rcu_dereference(in_dev->ifa_list);
2124                                if (ifa) {
2125                                        pkt_dev->saddr_min = ifa->ifa_address;
2126                                        pkt_dev->saddr_max = pkt_dev->saddr_min;
2127                                }
2128                        }
2129                        rcu_read_unlock();
2130                } else {
2131                        pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2132                        pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2133                }
2134
2135                pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2136                pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2137        }
2138        /* Initialize current values. */
2139        pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2140        if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2141                pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2142
2143        pkt_dev->cur_dst_mac_offset = 0;
2144        pkt_dev->cur_src_mac_offset = 0;
2145        pkt_dev->cur_saddr = pkt_dev->saddr_min;
2146        pkt_dev->cur_daddr = pkt_dev->daddr_min;
2147        pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2148        pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2149        pkt_dev->nflows = 0;
2150}
2151
2152
2153static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2154{
2155        ktime_t start_time, end_time;
2156        s64 remaining;
2157        struct hrtimer_sleeper t;
2158
2159        hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2160        hrtimer_set_expires(&t.timer, spin_until);
2161
2162        remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2163        if (remaining <= 0)
2164                goto out;
2165
2166        start_time = ktime_get();
2167        if (remaining < 100000) {
2168                /* for small delays (<100us), just loop until limit is reached */
2169                do {
2170                        end_time = ktime_get();
2171                } while (ktime_compare(end_time, spin_until) < 0);
2172        } else {
2173                do {
2174                        set_current_state(TASK_INTERRUPTIBLE);
2175                        hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS);
2176
2177                        if (likely(t.task))
2178                                schedule();
2179
2180                        hrtimer_cancel(&t.timer);
2181                } while (t.task && pkt_dev->running && !signal_pending(current));
2182                __set_current_state(TASK_RUNNING);
2183                end_time = ktime_get();
2184        }
2185
2186        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2187out:
2188        pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2189        destroy_hrtimer_on_stack(&t.timer);
2190}
2191
2192static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2193{
2194        pkt_dev->pkt_overhead = 0;
2195        pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2196        pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2197        pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2198}
2199
2200static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2201{
2202        return !!(pkt_dev->flows[flow].flags & F_INIT);
2203}
2204
2205static inline int f_pick(struct pktgen_dev *pkt_dev)
2206{
2207        int flow = pkt_dev->curfl;
2208
2209        if (pkt_dev->flags & F_FLOW_SEQ) {
2210                if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2211                        /* reset time */
2212                        pkt_dev->flows[flow].count = 0;
2213                        pkt_dev->flows[flow].flags = 0;
2214                        pkt_dev->curfl += 1;
2215                        if (pkt_dev->curfl >= pkt_dev->cflows)
2216                                pkt_dev->curfl = 0; /*reset */
2217                }
2218        } else {
2219                flow = prandom_u32() % pkt_dev->cflows;
2220                pkt_dev->curfl = flow;
2221
2222                if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2223                        pkt_dev->flows[flow].count = 0;
2224                        pkt_dev->flows[flow].flags = 0;
2225                }
2226        }
2227
2228        return pkt_dev->curfl;
2229}
2230
2231
2232#ifdef CONFIG_XFRM
2233/* If there was already an IPSEC SA, we keep it as is, else
2234 * we go look for it ...
2235*/
2236#define DUMMY_MARK 0
2237static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2238{
2239        struct xfrm_state *x = pkt_dev->flows[flow].x;
2240        struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2241        if (!x) {
2242
2243                if (pkt_dev->spi) {
2244                        /* We need as quick as possible to find the right SA
2245                         * Searching with minimum criteria to archieve this.
2246                         */
2247                        x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2248                } else {
2249                        /* slow path: we dont already have xfrm_state */
2250                        x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
2251                                                (xfrm_address_t *)&pkt_dev->cur_daddr,
2252                                                (xfrm_address_t *)&pkt_dev->cur_saddr,
2253                                                AF_INET,
2254                                                pkt_dev->ipsmode,
2255                                                pkt_dev->ipsproto, 0);
2256                }
2257                if (x) {
2258                        pkt_dev->flows[flow].x = x;
2259                        set_pkt_overhead(pkt_dev);
2260                        pkt_dev->pkt_overhead += x->props.header_len;
2261                }
2262
2263        }
2264}
2265#endif
2266static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2267{
2268
2269        if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2270                pkt_dev->cur_queue_map = smp_processor_id();
2271
2272        else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2273                __u16 t;
2274                if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2275                        t = prandom_u32() %
2276                                (pkt_dev->queue_map_max -
2277                                 pkt_dev->queue_map_min + 1)
2278                                + pkt_dev->queue_map_min;
2279                } else {
2280                        t = pkt_dev->cur_queue_map + 1;
2281                        if (t > pkt_dev->queue_map_max)
2282                                t = pkt_dev->queue_map_min;
2283                }
2284                pkt_dev->cur_queue_map = t;
2285        }
2286        pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2287}
2288
2289/* Increment/randomize headers according to flags and current values
2290 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2291 */
2292static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2293{
2294        __u32 imn;
2295        __u32 imx;
2296        int flow = 0;
2297
2298        if (pkt_dev->cflows)
2299                flow = f_pick(pkt_dev);
2300
2301        /*  Deal with source MAC */
2302        if (pkt_dev->src_mac_count > 1) {
2303                __u32 mc;
2304                __u32 tmp;
2305
2306                if (pkt_dev->flags & F_MACSRC_RND)
2307                        mc = prandom_u32() % pkt_dev->src_mac_count;
2308                else {
2309                        mc = pkt_dev->cur_src_mac_offset++;
2310                        if (pkt_dev->cur_src_mac_offset >=
2311                            pkt_dev->src_mac_count)
2312                                pkt_dev->cur_src_mac_offset = 0;
2313                }
2314
2315                tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2316                pkt_dev->hh[11] = tmp;
2317                tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2318                pkt_dev->hh[10] = tmp;
2319                tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2320                pkt_dev->hh[9] = tmp;
2321                tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2322                pkt_dev->hh[8] = tmp;
2323                tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2324                pkt_dev->hh[7] = tmp;
2325        }
2326
2327        /*  Deal with Destination MAC */
2328        if (pkt_dev->dst_mac_count > 1) {
2329                __u32 mc;
2330                __u32 tmp;
2331
2332                if (pkt_dev->flags & F_MACDST_RND)
2333                        mc = prandom_u32() % pkt_dev->dst_mac_count;
2334
2335                else {
2336                        mc = pkt_dev->cur_dst_mac_offset++;
2337                        if (pkt_dev->cur_dst_mac_offset >=
2338                            pkt_dev->dst_mac_count) {
2339                                pkt_dev->cur_dst_mac_offset = 0;
2340                        }
2341                }
2342
2343                tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2344                pkt_dev->hh[5] = tmp;
2345                tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2346                pkt_dev->hh[4] = tmp;
2347                tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2348                pkt_dev->hh[3] = tmp;
2349                tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2350                pkt_dev->hh[2] = tmp;
2351                tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2352                pkt_dev->hh[1] = tmp;
2353        }
2354
2355        if (pkt_dev->flags & F_MPLS_RND) {
2356                unsigned int i;
2357                for (i = 0; i < pkt_dev->nr_labels; i++)
2358                        if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2359                                pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2360                                             ((__force __be32)prandom_u32() &
2361                                                      htonl(0x000fffff));
2362        }
2363
2364        if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2365                pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2366        }
2367
2368        if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2369                pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2370        }
2371
2372        if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2373                if (pkt_dev->flags & F_UDPSRC_RND)
2374                        pkt_dev->cur_udp_src = prandom_u32() %
2375                                (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2376                                + pkt_dev->udp_src_min;
2377
2378                else {
2379                        pkt_dev->cur_udp_src++;
2380                        if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2381                                pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2382                }
2383        }
2384
2385        if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2386                if (pkt_dev->flags & F_UDPDST_RND) {
2387                        pkt_dev->cur_udp_dst = prandom_u32() %
2388                                (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2389                                + pkt_dev->udp_dst_min;
2390                } else {
2391                        pkt_dev->cur_udp_dst++;
2392                        if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2393                                pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2394                }
2395        }
2396
2397        if (!(pkt_dev->flags & F_IPV6)) {
2398
2399                imn = ntohl(pkt_dev->saddr_min);
2400                imx = ntohl(pkt_dev->saddr_max);
2401                if (imn < imx) {
2402                        __u32 t;
2403                        if (pkt_dev->flags & F_IPSRC_RND)
2404                                t = prandom_u32() % (imx - imn) + imn;
2405                        else {
2406                                t = ntohl(pkt_dev->cur_saddr);
2407                                t++;
2408                                if (t > imx)
2409                                        t = imn;
2410
2411                        }
2412                        pkt_dev->cur_saddr = htonl(t);
2413                }
2414
2415                if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2416                        pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2417                } else {
2418                        imn = ntohl(pkt_dev->daddr_min);
2419                        imx = ntohl(pkt_dev->daddr_max);
2420                        if (imn < imx) {
2421                                __u32 t;
2422                                __be32 s;
2423                                if (pkt_dev->flags & F_IPDST_RND) {
2424
2425                                        do {
2426                                                t = prandom_u32() %
2427                                                        (imx - imn) + imn;
2428                                                s = htonl(t);
2429                                        } while (ipv4_is_loopback(s) ||
2430                                                ipv4_is_multicast(s) ||
2431                                                ipv4_is_lbcast(s) ||
2432                                                ipv4_is_zeronet(s) ||
2433                                                ipv4_is_local_multicast(s));
2434                                        pkt_dev->cur_daddr = s;
2435                                } else {
2436                                        t = ntohl(pkt_dev->cur_daddr);
2437                                        t++;
2438                                        if (t > imx) {
2439                                                t = imn;
2440                                        }
2441                                        pkt_dev->cur_daddr = htonl(t);
2442                                }
2443                        }
2444                        if (pkt_dev->cflows) {
2445                                pkt_dev->flows[flow].flags |= F_INIT;
2446                                pkt_dev->flows[flow].cur_daddr =
2447                                    pkt_dev->cur_daddr;
2448#ifdef CONFIG_XFRM
2449                                if (pkt_dev->flags & F_IPSEC)
2450                                        get_ipsec_sa(pkt_dev, flow);
2451#endif
2452                                pkt_dev->nflows++;
2453                        }
2454                }
2455        } else {                /* IPV6 * */
2456
2457                if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2458                        int i;
2459
2460                        /* Only random destinations yet */
2461
2462                        for (i = 0; i < 4; i++) {
2463                                pkt_dev->cur_in6_daddr.s6_addr32[i] =
2464                                    (((__force __be32)prandom_u32() |
2465                                      pkt_dev->min_in6_daddr.s6_addr32[i]) &
2466                                     pkt_dev->max_in6_daddr.s6_addr32[i]);
2467                        }
2468                }
2469        }
2470
2471        if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2472                __u32 t;
2473                if (pkt_dev->flags & F_TXSIZE_RND) {
2474                        t = prandom_u32() %
2475                                (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2476                                + pkt_dev->min_pkt_size;
2477                } else {
2478                        t = pkt_dev->cur_pkt_size + 1;
2479                        if (t > pkt_dev->max_pkt_size)
2480                                t = pkt_dev->min_pkt_size;
2481                }
2482                pkt_dev->cur_pkt_size = t;
2483        }
2484
2485        set_cur_queue_map(pkt_dev);
2486
2487        pkt_dev->flows[flow].count++;
2488}
2489
2490
2491#ifdef CONFIG_XFRM
2492static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2493
2494        [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2495};
2496
2497static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2498{
2499        struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2500        int err = 0;
2501        struct net *net = dev_net(pkt_dev->odev);
2502
2503        if (!x)
2504                return 0;
2505        /* XXX: we dont support tunnel mode for now until
2506         * we resolve the dst issue */
2507        if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2508                return 0;
2509
2510        /* But when user specify an valid SPI, transformation
2511         * supports both transport/tunnel mode + ESP/AH type.
2512         */
2513        if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2514                skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
2515
2516        rcu_read_lock_bh();
2517        err = pktgen_xfrm_outer_mode_output(x, skb);
2518        rcu_read_unlock_bh();
2519        if (err) {
2520                XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2521                goto error;
2522        }
2523        err = x->type->output(x, skb);
2524        if (err) {
2525                XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2526                goto error;
2527        }
2528        spin_lock_bh(&x->lock);
2529        x->curlft.bytes += skb->len;
2530        x->curlft.packets++;
2531        spin_unlock_bh(&x->lock);
2532error:
2533        return err;
2534}
2535
2536static void free_SAs(struct pktgen_dev *pkt_dev)
2537{
2538        if (pkt_dev->cflows) {
2539                /* let go of the SAs if we have them */
2540                int i;
2541                for (i = 0; i < pkt_dev->cflows; i++) {
2542                        struct xfrm_state *x = pkt_dev->flows[i].x;
2543                        if (x) {
2544                                xfrm_state_put(x);
2545                                pkt_dev->flows[i].x = NULL;
2546                        }
2547                }
2548        }
2549}
2550
2551static int process_ipsec(struct pktgen_dev *pkt_dev,
2552                              struct sk_buff *skb, __be16 protocol)
2553{
2554        if (pkt_dev->flags & F_IPSEC) {
2555                struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2556                int nhead = 0;
2557                if (x) {
2558                        struct ethhdr *eth;
2559                        struct iphdr *iph;
2560                        int ret;
2561
2562                        nhead = x->props.header_len - skb_headroom(skb);
2563                        if (nhead > 0) {
2564                                ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2565                                if (ret < 0) {
2566                                        pr_err("Error expanding ipsec packet %d\n",
2567                                               ret);
2568                                        goto err;
2569                                }
2570                        }
2571
2572                        /* ipsec is not expecting ll header */
2573                        skb_pull(skb, ETH_HLEN);
2574                        ret = pktgen_output_ipsec(skb, pkt_dev);
2575                        if (ret) {
2576                                pr_err("Error creating ipsec packet %d\n", ret);
2577                                goto err;
2578                        }
2579                        /* restore ll */
2580                        eth = skb_push(skb, ETH_HLEN);
2581                        memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2582                        eth->h_proto = protocol;
2583
2584                        /* Update IPv4 header len as well as checksum value */
2585                        iph = ip_hdr(skb);
2586                        iph->tot_len = htons(skb->len - ETH_HLEN);
2587                        ip_send_check(iph);
2588                }
2589        }
2590        return 1;
2591err:
2592        kfree_skb(skb);
2593        return 0;
2594}
2595#endif
2596
2597static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2598{
2599        unsigned int i;
2600        for (i = 0; i < pkt_dev->nr_labels; i++)
2601                *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2602
2603        mpls--;
2604        *mpls |= MPLS_STACK_BOTTOM;
2605}
2606
2607static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2608                               unsigned int prio)
2609{
2610        return htons(id | (cfi << 12) | (prio << 13));
2611}
2612
2613static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2614                                int datalen)
2615{
2616        struct timespec64 timestamp;
2617        struct pktgen_hdr *pgh;
2618
2619        pgh = skb_put(skb, sizeof(*pgh));
2620        datalen -= sizeof(*pgh);
2621
2622        if (pkt_dev->nfrags <= 0) {
2623                skb_put_zero(skb, datalen);
2624        } else {
2625                int frags = pkt_dev->nfrags;
2626                int i, len;
2627                int frag_len;
2628
2629
2630                if (frags > MAX_SKB_FRAGS)
2631                        frags = MAX_SKB_FRAGS;
2632                len = datalen - frags * PAGE_SIZE;
2633                if (len > 0) {
2634                        skb_put_zero(skb, len);
2635                        datalen = frags * PAGE_SIZE;
2636                }
2637
2638                i = 0;
2639                frag_len = (datalen/frags) < PAGE_SIZE ?
2640                           (datalen/frags) : PAGE_SIZE;
2641                while (datalen > 0) {
2642                        if (unlikely(!pkt_dev->page)) {
2643                                int node = numa_node_id();
2644
2645                                if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2646                                        node = pkt_dev->node;
2647                                pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2648                                if (!pkt_dev->page)
2649                                        break;
2650                        }
2651                        get_page(pkt_dev->page);
2652                        skb_frag_set_page(skb, i, pkt_dev->page);
2653                        skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0);
2654                        /*last fragment, fill rest of data*/
2655                        if (i == (frags - 1))
2656                                skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2657                                    (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2658                        else
2659                                skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2660                        datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2661                        skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2662                        skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2663                        i++;
2664                        skb_shinfo(skb)->nr_frags = i;
2665                }
2666        }
2667
2668        /* Stamp the time, and sequence number,
2669         * convert them to network byte order
2670         */
2671        pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2672        pgh->seq_num = htonl(pkt_dev->seq_num);
2673
2674        if (pkt_dev->flags & F_NO_TIMESTAMP) {
2675                pgh->tv_sec = 0;
2676                pgh->tv_usec = 0;
2677        } else {
2678                /*
2679                 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2680                 * as done by wireshark, or y2038 when interpreted as signed.
2681                 * This is probably harmless, but if anyone wants to improve
2682                 * it, we could introduce a variant that puts 64-bit nanoseconds
2683                 * into the respective header bytes.
2684                 * This would also be slightly faster to read.
2685                 */
2686                ktime_get_real_ts64(&timestamp);
2687                pgh->tv_sec = htonl(timestamp.tv_sec);
2688                pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
2689        }
2690}
2691
2692static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2693                                        struct pktgen_dev *pkt_dev)
2694{
2695        unsigned int extralen = LL_RESERVED_SPACE(dev);
2696        struct sk_buff *skb = NULL;
2697        unsigned int size;
2698
2699        size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
2700        if (pkt_dev->flags & F_NODE) {
2701                int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2702
2703                skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2704                if (likely(skb)) {
2705                        skb_reserve(skb, NET_SKB_PAD);
2706                        skb->dev = dev;
2707                }
2708        } else {
2709                 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2710        }
2711
2712        /* the caller pre-fetches from skb->data and reserves for the mac hdr */
2713        if (likely(skb))
2714                skb_reserve(skb, extralen - 16);
2715
2716        return skb;
2717}
2718
2719static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2720                                        struct pktgen_dev *pkt_dev)
2721{
2722        struct sk_buff *skb = NULL;
2723        __u8 *eth;
2724        struct udphdr *udph;
2725        int datalen, iplen;
2726        struct iphdr *iph;
2727        __be16 protocol = htons(ETH_P_IP);
2728        __be32 *mpls;
2729        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2730        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2731        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2732        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2733        u16 queue_map;
2734
2735        if (pkt_dev->nr_labels)
2736                protocol = htons(ETH_P_MPLS_UC);
2737
2738        if (pkt_dev->vlan_id != 0xffff)
2739                protocol = htons(ETH_P_8021Q);
2740
2741        /* Update any of the values, used when we're incrementing various
2742         * fields.
2743         */
2744        mod_cur_headers(pkt_dev);
2745        queue_map = pkt_dev->cur_queue_map;
2746
2747        skb = pktgen_alloc_skb(odev, pkt_dev);
2748        if (!skb) {
2749                sprintf(pkt_dev->result, "No memory");
2750                return NULL;
2751        }
2752
2753        prefetchw(skb->data);
2754        skb_reserve(skb, 16);
2755
2756        /*  Reserve for ethernet and IP header  */
2757        eth = skb_push(skb, 14);
2758        mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2759        if (pkt_dev->nr_labels)
2760                mpls_push(mpls, pkt_dev);
2761
2762        if (pkt_dev->vlan_id != 0xffff) {
2763                if (pkt_dev->svlan_id != 0xffff) {
2764                        svlan_tci = skb_put(skb, sizeof(__be16));
2765                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2766                                               pkt_dev->svlan_cfi,
2767                                               pkt_dev->svlan_p);
2768                        svlan_encapsulated_proto = skb_put(skb,
2769                                                           sizeof(__be16));
2770                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2771                }
2772                vlan_tci = skb_put(skb, sizeof(__be16));
2773                *vlan_tci = build_tci(pkt_dev->vlan_id,
2774                                      pkt_dev->vlan_cfi,
2775                                      pkt_dev->vlan_p);
2776                vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2777                *vlan_encapsulated_proto = htons(ETH_P_IP);
2778        }
2779
2780        skb_reset_mac_header(skb);
2781        skb_set_network_header(skb, skb->len);
2782        iph = skb_put(skb, sizeof(struct iphdr));
2783
2784        skb_set_transport_header(skb, skb->len);
2785        udph = skb_put(skb, sizeof(struct udphdr));
2786        skb_set_queue_mapping(skb, queue_map);
2787        skb->priority = pkt_dev->skb_priority;
2788
2789        memcpy(eth, pkt_dev->hh, 12);
2790        *(__be16 *) & eth[12] = protocol;
2791
2792        /* Eth + IPh + UDPh + mpls */
2793        datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2794                  pkt_dev->pkt_overhead;
2795        if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2796                datalen = sizeof(struct pktgen_hdr);
2797
2798        udph->source = htons(pkt_dev->cur_udp_src);
2799        udph->dest = htons(pkt_dev->cur_udp_dst);
2800        udph->len = htons(datalen + 8); /* DATA + udphdr */
2801        udph->check = 0;
2802
2803        iph->ihl = 5;
2804        iph->version = 4;
2805        iph->ttl = 32;
2806        iph->tos = pkt_dev->tos;
2807        iph->protocol = IPPROTO_UDP;    /* UDP */
2808        iph->saddr = pkt_dev->cur_saddr;
2809        iph->daddr = pkt_dev->cur_daddr;
2810        iph->id = htons(pkt_dev->ip_id);
2811        pkt_dev->ip_id++;
2812        iph->frag_off = 0;
2813        iplen = 20 + 8 + datalen;
2814        iph->tot_len = htons(iplen);
2815        ip_send_check(iph);
2816        skb->protocol = protocol;
2817        skb->dev = odev;
2818        skb->pkt_type = PACKET_HOST;
2819
2820        pktgen_finalize_skb(pkt_dev, skb, datalen);
2821
2822        if (!(pkt_dev->flags & F_UDPCSUM)) {
2823                skb->ip_summed = CHECKSUM_NONE;
2824        } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2825                skb->ip_summed = CHECKSUM_PARTIAL;
2826                skb->csum = 0;
2827                udp4_hwcsum(skb, iph->saddr, iph->daddr);
2828        } else {
2829                __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2830
2831                /* add protocol-dependent pseudo-header */
2832                udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2833                                                datalen + 8, IPPROTO_UDP, csum);
2834
2835                if (udph->check == 0)
2836                        udph->check = CSUM_MANGLED_0;
2837        }
2838
2839#ifdef CONFIG_XFRM
2840        if (!process_ipsec(pkt_dev, skb, protocol))
2841                return NULL;
2842#endif
2843
2844        return skb;
2845}
2846
2847static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2848                                        struct pktgen_dev *pkt_dev)
2849{
2850        struct sk_buff *skb = NULL;
2851        __u8 *eth;
2852        struct udphdr *udph;
2853        int datalen, udplen;
2854        struct ipv6hdr *iph;
2855        __be16 protocol = htons(ETH_P_IPV6);
2856        __be32 *mpls;
2857        __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2858        __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2859        __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2860        __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2861        u16 queue_map;
2862
2863        if (pkt_dev->nr_labels)
2864                protocol = htons(ETH_P_MPLS_UC);
2865
2866        if (pkt_dev->vlan_id != 0xffff)
2867                protocol = htons(ETH_P_8021Q);
2868
2869        /* Update any of the values, used when we're incrementing various
2870         * fields.
2871         */
2872        mod_cur_headers(pkt_dev);
2873        queue_map = pkt_dev->cur_queue_map;
2874
2875        skb = pktgen_alloc_skb(odev, pkt_dev);
2876        if (!skb) {
2877                sprintf(pkt_dev->result, "No memory");
2878                return NULL;
2879        }
2880
2881        prefetchw(skb->data);
2882        skb_reserve(skb, 16);
2883
2884        /*  Reserve for ethernet and IP header  */
2885        eth = skb_push(skb, 14);
2886        mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2887        if (pkt_dev->nr_labels)
2888                mpls_push(mpls, pkt_dev);
2889
2890        if (pkt_dev->vlan_id != 0xffff) {
2891                if (pkt_dev->svlan_id != 0xffff) {
2892                        svlan_tci = skb_put(skb, sizeof(__be16));
2893                        *svlan_tci = build_tci(pkt_dev->svlan_id,
2894                                               pkt_dev->svlan_cfi,
2895                                               pkt_dev->svlan_p);
2896                        svlan_encapsulated_proto = skb_put(skb,
2897                                                           sizeof(__be16));
2898                        *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2899                }
2900                vlan_tci = skb_put(skb, sizeof(__be16));
2901                *vlan_tci = build_tci(pkt_dev->vlan_id,
2902                                      pkt_dev->vlan_cfi,
2903                                      pkt_dev->vlan_p);
2904                vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2905                *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2906        }
2907
2908        skb_reset_mac_header(skb);
2909        skb_set_network_header(skb, skb->len);
2910        iph = skb_put(skb, sizeof(struct ipv6hdr));
2911
2912        skb_set_transport_header(skb, skb->len);
2913        udph = skb_put(skb, sizeof(struct udphdr));
2914        skb_set_queue_mapping(skb, queue_map);
2915        skb->priority = pkt_dev->skb_priority;
2916
2917        memcpy(eth, pkt_dev->hh, 12);
2918        *(__be16 *) &eth[12] = protocol;
2919
2920        /* Eth + IPh + UDPh + mpls */
2921        datalen = pkt_dev->cur_pkt_size - 14 -
2922                  sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2923                  pkt_dev->pkt_overhead;
2924
2925        if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2926                datalen = sizeof(struct pktgen_hdr);
2927                net_info_ratelimited("increased datalen to %d\n", datalen);
2928        }
2929
2930        udplen = datalen + sizeof(struct udphdr);
2931        udph->source = htons(pkt_dev->cur_udp_src);
2932        udph->dest = htons(pkt_dev->cur_udp_dst);
2933        udph->len = htons(udplen);
2934        udph->check = 0;
2935
2936        *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
2937
2938        if (pkt_dev->traffic_class) {
2939                /* Version + traffic class + flow (0) */
2940                *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2941        }
2942
2943        iph->hop_limit = 32;
2944
2945        iph->payload_len = htons(udplen);
2946        iph->nexthdr = IPPROTO_UDP;
2947
2948        iph->daddr = pkt_dev->cur_in6_daddr;
2949        iph->saddr = pkt_dev->cur_in6_saddr;
2950
2951        skb->protocol = protocol;
2952        skb->dev = odev;
2953        skb->pkt_type = PACKET_HOST;
2954
2955        pktgen_finalize_skb(pkt_dev, skb, datalen);
2956
2957        if (!(pkt_dev->flags & F_UDPCSUM)) {
2958                skb->ip_summed = CHECKSUM_NONE;
2959        } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
2960                skb->ip_summed = CHECKSUM_PARTIAL;
2961                skb->csum_start = skb_transport_header(skb) - skb->head;
2962                skb->csum_offset = offsetof(struct udphdr, check);
2963                udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2964        } else {
2965                __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
2966
2967                /* add protocol-dependent pseudo-header */
2968                udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2969
2970                if (udph->check == 0)
2971                        udph->check = CSUM_MANGLED_0;
2972        }
2973
2974        return skb;
2975}
2976
2977static struct sk_buff *fill_packet(struct net_device *odev,
2978                                   struct pktgen_dev *pkt_dev)
2979{
2980        if (pkt_dev->flags & F_IPV6)
2981                return fill_packet_ipv6(odev, pkt_dev);
2982        else
2983                return fill_packet_ipv4(odev, pkt_dev);
2984}
2985
2986static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2987{
2988        pkt_dev->seq_num = 1;
2989        pkt_dev->idle_acc = 0;
2990        pkt_dev->sofar = 0;
2991        pkt_dev->tx_bytes = 0;
2992        pkt_dev->errors = 0;
2993}
2994
2995/* Set up structure for sending pkts, clear counters */
2996
2997static void pktgen_run(struct pktgen_thread *t)
2998{
2999        struct pktgen_dev *pkt_dev;
3000        int started = 0;
3001
3002        func_enter();
3003
3004        rcu_read_lock();
3005        list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3006
3007                /*
3008                 * setup odev and create initial packet.
3009                 */
3010                pktgen_setup_inject(pkt_dev);
3011
3012                if (pkt_dev->odev) {
3013                        pktgen_clear_counters(pkt_dev);
3014                        pkt_dev->skb = NULL;
3015                        pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3016
3017                        set_pkt_overhead(pkt_dev);
3018
3019                        strcpy(pkt_dev->result, "Starting");
3020                        pkt_dev->running = 1;   /* Cranke yeself! */
3021                        started++;
3022                } else
3023                        strcpy(pkt_dev->result, "Error starting");
3024        }
3025        rcu_read_unlock();
3026        if (started)
3027                t->control &= ~(T_STOP);
3028}
3029
3030static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3031{
3032        struct pktgen_thread *t;
3033
3034        func_enter();
3035
3036        mutex_lock(&pktgen_thread_lock);
3037
3038        list_for_each_entry(t, &pn->pktgen_threads, th_list)
3039                t->control |= T_STOP;
3040
3041        mutex_unlock(&pktgen_thread_lock);
3042}
3043
3044static int thread_is_running(const struct pktgen_thread *t)
3045{
3046        const struct pktgen_dev *pkt_dev;
3047
3048        rcu_read_lock();
3049        list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3050                if (pkt_dev->running) {
3051                        rcu_read_unlock();
3052                        return 1;
3053                }
3054        rcu_read_unlock();
3055        return 0;
3056}
3057
3058static int pktgen_wait_thread_run(struct pktgen_thread *t)
3059{
3060        while (thread_is_running(t)) {
3061
3062                /* note: 't' will still be around even after the unlock/lock
3063                 * cycle because pktgen_thread threads are only cleared at
3064                 * net exit
3065                 */
3066                mutex_unlock(&pktgen_thread_lock);
3067                msleep_interruptible(100);
3068                mutex_lock(&pktgen_thread_lock);
3069
3070                if (signal_pending(current))
3071                        goto signal;
3072        }
3073        return 1;
3074signal:
3075        return 0;
3076}
3077
3078static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3079{
3080        struct pktgen_thread *t;
3081        int sig = 1;
3082
3083        /* prevent from racing with rmmod */
3084        if (!try_module_get(THIS_MODULE))
3085                return sig;
3086
3087        mutex_lock(&pktgen_thread_lock);
3088
3089        list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3090                sig = pktgen_wait_thread_run(t);
3091                if (sig == 0)
3092                        break;
3093        }
3094
3095        if (sig == 0)
3096                list_for_each_entry(t, &pn->pktgen_threads, th_list)
3097                        t->control |= (T_STOP);
3098
3099        mutex_unlock(&pktgen_thread_lock);
3100        module_put(THIS_MODULE);
3101        return sig;
3102}
3103
3104static void pktgen_run_all_threads(struct pktgen_net *pn)
3105{
3106        struct pktgen_thread *t;
3107
3108        func_enter();
3109
3110        mutex_lock(&pktgen_thread_lock);
3111
3112        list_for_each_entry(t, &pn->pktgen_threads, th_list)
3113                t->control |= (T_RUN);
3114
3115        mutex_unlock(&pktgen_thread_lock);
3116
3117        /* Propagate thread->control  */
3118        schedule_timeout_interruptible(msecs_to_jiffies(125));
3119
3120        pktgen_wait_all_threads_run(pn);
3121}
3122
3123static void pktgen_reset_all_threads(struct pktgen_net *pn)
3124{
3125        struct pktgen_thread *t;
3126
3127        func_enter();
3128
3129        mutex_lock(&pktgen_thread_lock);
3130
3131        list_for_each_entry(t, &pn->pktgen_threads, th_list)
3132                t->control |= (T_REMDEVALL);
3133
3134        mutex_unlock(&pktgen_thread_lock);
3135
3136        /* Propagate thread->control  */
3137        schedule_timeout_interruptible(msecs_to_jiffies(125));
3138
3139        pktgen_wait_all_threads_run(pn);
3140}
3141
3142static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3143{
3144        __u64 bps, mbps, pps;
3145        char *p = pkt_dev->result;
3146        ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3147                                    pkt_dev->started_at);
3148        ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3149
3150        p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3151                     (unsigned long long)ktime_to_us(elapsed),
3152                     (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3153                     (unsigned long long)ktime_to_us(idle),
3154                     (unsigned long long)pkt_dev->sofar,
3155                     pkt_dev->cur_pkt_size, nr_frags);
3156
3157        pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3158                        ktime_to_ns(elapsed));
3159
3160        bps = pps * 8 * pkt_dev->cur_pkt_size;
3161
3162        mbps = bps;
3163        do_div(mbps, 1000000);
3164        p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
3165                     (unsigned long long)pps,
3166                     (unsigned long long)mbps,
3167                     (unsigned long long)bps,
3168                     (unsigned long long)pkt_dev->errors);
3169}
3170
3171/* Set stopped-at timer, remove from running list, do counters & statistics */
3172static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3173{
3174        int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3175
3176        if (!pkt_dev->running) {
3177                pr_warn("interface: %s is already stopped\n",
3178                        pkt_dev->odevname);
3179                return -EINVAL;
3180        }
3181
3182        pkt_dev->running = 0;
3183        kfree_skb(pkt_dev->skb);
3184        pkt_dev->skb = NULL;
3185        pkt_dev->stopped_at = ktime_get();
3186
3187        show_results(pkt_dev, nr_frags);
3188
3189        return 0;
3190}
3191
3192static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3193{
3194        struct pktgen_dev *pkt_dev, *best = NULL;
3195
3196        rcu_read_lock();
3197        list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3198                if (!pkt_dev->running)
3199                        continue;
3200                if (best == NULL)
3201                        best = pkt_dev;
3202                else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3203                        best = pkt_dev;
3204        }
3205        rcu_read_unlock();
3206
3207        return best;
3208}
3209
3210static void pktgen_stop(struct pktgen_thread *t)
3211{
3212        struct pktgen_dev *pkt_dev;
3213
3214        func_enter();
3215
3216        rcu_read_lock();
3217
3218        list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3219                pktgen_stop_device(pkt_dev);
3220        }
3221
3222        rcu_read_unlock();
3223}
3224
3225/*
3226 * one of our devices needs to be removed - find it
3227 * and remove it
3228 */
3229static void pktgen_rem_one_if(struct pktgen_thread *t)
3230{
3231        struct list_head *q, *n;
3232        struct pktgen_dev *cur;
3233
3234        func_enter();
3235
3236        list_for_each_safe(q, n, &t->if_list) {
3237                cur = list_entry(q, struct pktgen_dev, list);
3238
3239                if (!cur->removal_mark)
3240                        continue;
3241
3242                kfree_skb(cur->skb);
3243                cur->skb = NULL;
3244
3245                pktgen_remove_device(t, cur);
3246
3247                break;
3248        }
3249}
3250
3251static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3252{
3253        struct list_head *q, *n;
3254        struct pktgen_dev *cur;
3255
3256        func_enter();
3257
3258        /* Remove all devices, free mem */
3259
3260        list_for_each_safe(q, n, &t->if_list) {
3261                cur = list_entry(q, struct pktgen_dev, list);
3262
3263                kfree_skb(cur->skb);
3264                cur->skb = NULL;
3265
3266                pktgen_remove_device(t, cur);
3267        }
3268}
3269
3270static void pktgen_rem_thread(struct pktgen_thread *t)
3271{
3272        /* Remove from the thread list */
3273        remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3274}
3275
3276static void pktgen_resched(struct pktgen_dev *pkt_dev)
3277{
3278        ktime_t idle_start = ktime_get();
3279        schedule();
3280        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3281}
3282
3283static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3284{
3285        ktime_t idle_start = ktime_get();
3286
3287        while (refcount_read(&(pkt_dev->skb->users)) != 1) {
3288                if (signal_pending(current))
3289                        break;
3290
3291                if (need_resched())
3292                        pktgen_resched(pkt_dev);
3293                else
3294                        cpu_relax();
3295        }
3296        pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3297}
3298
3299static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3300{
3301        unsigned int burst = READ_ONCE(pkt_dev->burst);
3302        struct net_device *odev = pkt_dev->odev;
3303        struct netdev_queue *txq;
3304        struct sk_buff *skb;
3305        int ret;
3306
3307        /* If device is offline, then don't send */
3308        if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3309                pktgen_stop_device(pkt_dev);
3310                return;
3311        }
3312
3313        /* This is max DELAY, this has special meaning of
3314         * "never transmit"
3315         */
3316        if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3317                pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3318                return;
3319        }
3320
3321        /* If no skb or clone count exhausted then get new one */
3322        if (!pkt_dev->skb || (pkt_dev->last_ok &&
3323                              ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3324                /* build a new pkt */
3325                kfree_skb(pkt_dev->skb);
3326
3327                pkt_dev->skb = fill_packet(odev, pkt_dev);
3328                if (pkt_dev->skb == NULL) {
3329                        pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3330                        schedule();
3331                        pkt_dev->clone_count--; /* back out increment, OOM */
3332                        return;
3333                }
3334                pkt_dev->last_pkt_size = pkt_dev->skb->len;
3335                pkt_dev->clone_count = 0;       /* reset counter */
3336        }
3337
3338        if (pkt_dev->delay && pkt_dev->last_ok)
3339                spin(pkt_dev, pkt_dev->next_tx);
3340
3341        if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3342                skb = pkt_dev->skb;
3343                skb->protocol = eth_type_trans(skb, skb->dev);
3344                refcount_add(burst, &skb->users);
3345                local_bh_disable();
3346                do {
3347                        ret = netif_receive_skb(skb);
3348                        if (ret == NET_RX_DROP)
3349                                pkt_dev->errors++;
3350                        pkt_dev->sofar++;
3351                        pkt_dev->seq_num++;
3352                        if (refcount_read(&skb->users) != burst) {
3353                                /* skb was queued by rps/rfs or taps,
3354                                 * so cannot reuse this skb
3355                                 */
3356                                WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
3357                                /* get out of the loop and wait
3358                                 * until skb is consumed
3359                                 */
3360                                break;
3361                        }
3362                        /* skb was 'freed' by stack, so clean few
3363                         * bits and reuse it
3364                         */
3365                        skb_reset_tc(skb);
3366                } while (--burst > 0);
3367                goto out; /* Skips xmit_mode M_START_XMIT */
3368        } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3369                local_bh_disable();
3370                refcount_inc(&pkt_dev->skb->users);
3371
3372                ret = dev_queue_xmit(pkt_dev->skb);
3373                switch (ret) {
3374                case NET_XMIT_SUCCESS:
3375                        pkt_dev->sofar++;
3376                        pkt_dev->seq_num++;
3377                        pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3378                        break;
3379                case NET_XMIT_DROP:
3380                case NET_XMIT_CN:
3381                /* These are all valid return codes for a qdisc but
3382                 * indicate packets are being dropped or will likely
3383                 * be dropped soon.
3384                 */
3385                case NETDEV_TX_BUSY:
3386                /* qdisc may call dev_hard_start_xmit directly in cases
3387                 * where no queues exist e.g. loopback device, virtual
3388                 * devices, etc. In this case we need to handle
3389                 * NETDEV_TX_ codes.
3390                 */
3391                default:
3392                        pkt_dev->errors++;
3393                        net_info_ratelimited("%s xmit error: %d\n",
3394                                             pkt_dev->odevname, ret);
3395                        break;
3396                }
3397                goto out;
3398        }
3399
3400        txq = skb_get_tx_queue(odev, pkt_dev->skb);
3401
3402        local_bh_disable();
3403
3404        HARD_TX_LOCK(odev, txq, smp_processor_id());
3405
3406        if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3407                ret = NETDEV_TX_BUSY;
3408                pkt_dev->last_ok = 0;
3409                goto unlock;
3410        }
3411        refcount_add(burst, &pkt_dev->skb->users);
3412
3413xmit_more:
3414        ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3415
3416        switch (ret) {
3417        case NETDEV_TX_OK:
3418                pkt_dev->last_ok = 1;
3419                pkt_dev->sofar++;
3420                pkt_dev->seq_num++;
3421                pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3422                if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3423                        goto xmit_more;
3424                break;
3425        case NET_XMIT_DROP:
3426        case NET_XMIT_CN:
3427                /* skb has been consumed */
3428                pkt_dev->errors++;
3429                break;
3430        default: /* Drivers are not supposed to return other values! */
3431                net_info_ratelimited("%s xmit error: %d\n",
3432                                     pkt_dev->odevname, ret);
3433                pkt_dev->errors++;
3434                /* fall through */
3435        case NETDEV_TX_BUSY:
3436                /* Retry it next time */
3437                refcount_dec(&(pkt_dev->skb->users));
3438                pkt_dev->last_ok = 0;
3439        }
3440        if (unlikely(burst))
3441                WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
3442unlock:
3443        HARD_TX_UNLOCK(odev, txq);
3444
3445out:
3446        local_bh_enable();
3447
3448        /* If pkt_dev->count is zero, then run forever */
3449        if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3450                pktgen_wait_for_skb(pkt_dev);
3451
3452                /* Done with this */
3453                pktgen_stop_device(pkt_dev);
3454        }
3455}
3456
3457/*
3458 * Main loop of the thread goes here
3459 */
3460
3461static int pktgen_thread_worker(void *arg)
3462{
3463        DEFINE_WAIT(wait);
3464        struct pktgen_thread *t = arg;
3465        struct pktgen_dev *pkt_dev = NULL;
3466        int cpu = t->cpu;
3467
3468        BUG_ON(smp_processor_id() != cpu);
3469
3470        init_waitqueue_head(&t->queue);
3471        complete(&t->start_done);
3472
3473        pr_debug("starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
3474
3475        set_freezable();
3476
3477        while (!kthread_should_stop()) {
3478                pkt_dev = next_to_run(t);
3479
3480                if (unlikely(!pkt_dev && t->control == 0)) {
3481                        if (t->net->pktgen_exiting)
3482                                break;
3483                        wait_event_interruptible_timeout(t->queue,
3484                                                         t->control != 0,
3485                                                         HZ/10);
3486                        try_to_freeze();
3487                        continue;
3488                }
3489
3490                if (likely(pkt_dev)) {
3491                        pktgen_xmit(pkt_dev);
3492
3493                        if (need_resched())
3494                                pktgen_resched(pkt_dev);
3495                        else
3496                                cpu_relax();
3497                }
3498
3499                if (t->control & T_STOP) {
3500                        pktgen_stop(t);
3501                        t->control &= ~(T_STOP);
3502                }
3503
3504                if (t->control & T_RUN) {
3505                        pktgen_run(t);
3506                        t->control &= ~(T_RUN);
3507                }
3508
3509                if (t->control & T_REMDEVALL) {
3510                        pktgen_rem_all_ifs(t);
3511                        t->control &= ~(T_REMDEVALL);
3512                }
3513
3514                if (t->control & T_REMDEV) {
3515                        pktgen_rem_one_if(t);
3516                        t->control &= ~(T_REMDEV);
3517                }
3518
3519                try_to_freeze();
3520        }
3521
3522        pr_debug("%s stopping all device\n", t->tsk->comm);
3523        pktgen_stop(t);
3524
3525        pr_debug("%s removing all device\n", t->tsk->comm);
3526        pktgen_rem_all_ifs(t);
3527
3528        pr_debug("%s removing thread\n", t->tsk->comm);
3529        pktgen_rem_thread(t);
3530
3531        return 0;
3532}
3533
3534static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3535                                          const char *ifname, bool exact)
3536{
3537        struct pktgen_dev *p, *pkt_dev = NULL;
3538        size_t len = strlen(ifname);
3539
3540        rcu_read_lock();
3541        list_for_each_entry_rcu(p, &t->if_list, list)
3542                if (strncmp(p->odevname, ifname, len) == 0) {
3543                        if (p->odevname[len]) {
3544                                if (exact || p->odevname[len] != '@')
3545                                        continue;
3546                        }
3547                        pkt_dev = p;
3548                        break;
3549                }
3550
3551        rcu_read_unlock();
3552        pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3553        return pkt_dev;
3554}
3555
3556/*
3557 * Adds a dev at front of if_list.
3558 */
3559
3560static int add_dev_to_thread(struct pktgen_thread *t,
3561                             struct pktgen_dev *pkt_dev)
3562{
3563        int rv = 0;
3564
3565        /* This function cannot be called concurrently, as its called
3566         * under pktgen_thread_lock mutex, but it can run from
3567         * userspace on another CPU than the kthread.  The if_lock()
3568         * is used here to sync with concurrent instances of
3569         * _rem_dev_from_if_list() invoked via kthread, which is also
3570         * updating the if_list */
3571        if_lock(t);
3572
3573        if (pkt_dev->pg_thread) {
3574                pr_err("ERROR: already assigned to a thread\n");
3575                rv = -EBUSY;
3576                goto out;
3577        }
3578
3579        pkt_dev->running = 0;
3580        pkt_dev->pg_thread = t;
3581        list_add_rcu(&pkt_dev->list, &t->if_list);
3582
3583out:
3584        if_unlock(t);
3585        return rv;
3586}
3587
3588/* Called under thread lock */
3589
3590static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3591{
3592        struct pktgen_dev *pkt_dev;
3593        int err;
3594        int node = cpu_to_node(t->cpu);
3595
3596        /* We don't allow a device to be on several threads */
3597
3598        pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3599        if (pkt_dev) {
3600                pr_err("ERROR: interface already used\n");
3601                return -EBUSY;
3602        }
3603
3604        pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3605        if (!pkt_dev)
3606                return -ENOMEM;
3607
3608        strcpy(pkt_dev->odevname, ifname);
3609        pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
3610                                                 sizeof(struct flow_state)),
3611                                      node);
3612        if (pkt_dev->flows == NULL) {
3613                kfree(pkt_dev);
3614                return -ENOMEM;
3615        }
3616
3617        pkt_dev->removal_mark = 0;
3618        pkt_dev->nfrags = 0;
3619        pkt_dev->delay = pg_delay_d;
3620        pkt_dev->count = pg_count_d;
3621        pkt_dev->sofar = 0;
3622        pkt_dev->udp_src_min = 9;       /* sink port */
3623        pkt_dev->udp_src_max = 9;
3624        pkt_dev->udp_dst_min = 9;
3625        pkt_dev->udp_dst_max = 9;
3626        pkt_dev->vlan_p = 0;
3627        pkt_dev->vlan_cfi = 0;
3628        pkt_dev->vlan_id = 0xffff;
3629        pkt_dev->svlan_p = 0;
3630        pkt_dev->svlan_cfi = 0;
3631        pkt_dev->svlan_id = 0xffff;
3632        pkt_dev->burst = 1;
3633        pkt_dev->node = NUMA_NO_NODE;
3634
3635        err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3636        if (err)
3637                goto out1;
3638        if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3639                pkt_dev->clone_skb = pg_clone_skb_d;
3640
3641        pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3642                                          &pktgen_if_fops, pkt_dev);
3643        if (!pkt_dev->entry) {
3644                pr_err("cannot create %s/%s procfs entry\n",
3645                       PG_PROC_DIR, ifname);
3646                err = -EINVAL;
3647                goto out2;
3648        }
3649#ifdef CONFIG_XFRM
3650        pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3651        pkt_dev->ipsproto = IPPROTO_ESP;
3652
3653        /* xfrm tunnel mode needs additional dst to extract outter
3654         * ip header protocol/ttl/id field, here creat a phony one.
3655         * instead of looking for a valid rt, which definitely hurting
3656         * performance under such circumstance.
3657         */
3658        pkt_dev->dstops.family = AF_INET;
3659        pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3660        dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3661        pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3662        pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
3663#endif
3664
3665        return add_dev_to_thread(t, pkt_dev);
3666out2:
3667        dev_put(pkt_dev->odev);
3668out1:
3669#ifdef CONFIG_XFRM
3670        free_SAs(pkt_dev);
3671#endif
3672        vfree(pkt_dev->flows);
3673        kfree(pkt_dev);
3674        return err;
3675}
3676
3677static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3678{
3679        struct pktgen_thread *t;
3680        struct proc_dir_entry *pe;
3681        struct task_struct *p;
3682
3683        t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3684                         cpu_to_node(cpu));
3685        if (!t) {
3686                pr_err("ERROR: out of memory, can't create new thread\n");
3687                return -ENOMEM;
3688        }
3689
3690        mutex_init(&t->if_lock);
3691        t->cpu = cpu;
3692
3693        INIT_LIST_HEAD(&t->if_list);
3694
3695        list_add_tail(&t->th_list, &pn->pktgen_threads);
3696        init_completion(&t->start_done);
3697
3698        p = kthread_create_on_node(pktgen_thread_worker,
3699                                   t,
3700                                   cpu_to_node(cpu),
3701                                   "kpktgend_%d", cpu);
3702        if (IS_ERR(p)) {
3703                pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3704                list_del(&t->th_list);
3705                kfree(t);
3706                return PTR_ERR(p);
3707        }
3708        kthread_bind(p, cpu);
3709        t->tsk = p;
3710
3711        pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3712                              &pktgen_thread_fops, t);
3713        if (!pe) {
3714                pr_err("cannot create %s/%s procfs entry\n",
3715                       PG_PROC_DIR, t->tsk->comm);
3716                kthread_stop(p);
3717                list_del(&t->th_list);
3718                kfree(t);
3719                return -EINVAL;
3720        }
3721
3722        t->net = pn;
3723        get_task_struct(p);
3724        wake_up_process(p);
3725        wait_for_completion(&t->start_done);
3726
3727        return 0;
3728}
3729
3730/*
3731 * Removes a device from the thread if_list.
3732 */
3733static void _rem_dev_from_if_list(struct pktgen_thread *t,
3734                                  struct pktgen_dev *pkt_dev)
3735{
3736        struct list_head *q, *n;
3737        struct pktgen_dev *p;
3738
3739        if_lock(t);
3740        list_for_each_safe(q, n, &t->if_list) {
3741                p = list_entry(q, struct pktgen_dev, list);
3742                if (p == pkt_dev)
3743                        list_del_rcu(&p->list);
3744        }
3745        if_unlock(t);
3746}
3747
3748static int pktgen_remove_device(struct pktgen_thread *t,
3749                                struct pktgen_dev *pkt_dev)
3750{
3751        pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3752
3753        if (pkt_dev->running) {
3754                pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3755                pktgen_stop_device(pkt_dev);
3756        }
3757
3758        /* Dis-associate from the interface */
3759
3760        if (pkt_dev->odev) {
3761                dev_put(pkt_dev->odev);
3762                pkt_dev->odev = NULL;
3763        }
3764
3765        /* Remove proc before if_list entry, because add_device uses
3766         * list to determine if interface already exist, avoid race
3767         * with proc_create_data() */
3768        proc_remove(pkt_dev->entry);
3769
3770        /* And update the thread if_list */
3771        _rem_dev_from_if_list(t, pkt_dev);
3772
3773#ifdef CONFIG_XFRM
3774        free_SAs(pkt_dev);
3775#endif
3776        vfree(pkt_dev->flows);
3777        if (pkt_dev->page)
3778                put_page(pkt_dev->page);
3779        kfree_rcu(pkt_dev, rcu);
3780        return 0;
3781}
3782
3783static int __net_init pg_net_init(struct net *net)
3784{
3785        struct pktgen_net *pn = net_generic(net, pg_net_id);
3786        struct proc_dir_entry *pe;
3787        int cpu, ret = 0;
3788
3789        pn->net = net;
3790        INIT_LIST_HEAD(&pn->pktgen_threads);
3791        pn->pktgen_exiting = false;
3792        pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3793        if (!pn->proc_dir) {
3794                pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3795                return -ENODEV;
3796        }
3797        pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3798        if (pe == NULL) {
3799                pr_err("cannot create %s procfs entry\n", PGCTRL);
3800                ret = -EINVAL;
3801                goto remove;
3802        }
3803
3804        for_each_online_cpu(cpu) {
3805                int err;
3806
3807                err = pktgen_create_thread(cpu, pn);
3808                if (err)
3809                        pr_warn("Cannot create thread for cpu %d (%d)\n",
3810                                   cpu, err);
3811        }
3812
3813        if (list_empty(&pn->pktgen_threads)) {
3814                pr_err("Initialization failed for all threads\n");
3815                ret = -ENODEV;
3816                goto remove_entry;
3817        }
3818
3819        return 0;
3820
3821remove_entry:
3822        remove_proc_entry(PGCTRL, pn->proc_dir);
3823remove:
3824        remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3825        return ret;
3826}
3827
3828static void __net_exit pg_net_exit(struct net *net)
3829{
3830        struct pktgen_net *pn = net_generic(net, pg_net_id);
3831        struct pktgen_thread *t;
3832        struct list_head *q, *n;
3833        LIST_HEAD(list);
3834
3835        /* Stop all interfaces & threads */
3836        pn->pktgen_exiting = true;
3837
3838        mutex_lock(&pktgen_thread_lock);
3839        list_splice_init(&pn->pktgen_threads, &list);
3840        mutex_unlock(&pktgen_thread_lock);
3841
3842        list_for_each_safe(q, n, &list) {
3843                t = list_entry(q, struct pktgen_thread, th_list);
3844                list_del(&t->th_list);
3845                kthread_stop(t->tsk);
3846                put_task_struct(t->tsk);
3847                kfree(t);
3848        }
3849
3850        remove_proc_entry(PGCTRL, pn->proc_dir);
3851        remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3852}
3853
3854static struct pernet_operations pg_net_ops = {
3855        .init = pg_net_init,
3856        .exit = pg_net_exit,
3857        .id   = &pg_net_id,
3858        .size = sizeof(struct pktgen_net),
3859};
3860
3861static int __init pg_init(void)
3862{
3863        int ret = 0;
3864
3865        pr_info("%s", version);
3866        ret = register_pernet_subsys(&pg_net_ops);
3867        if (ret)
3868                return ret;
3869        ret = register_netdevice_notifier(&pktgen_notifier_block);
3870        if (ret)
3871                unregister_pernet_subsys(&pg_net_ops);
3872
3873        return ret;
3874}
3875
3876static void __exit pg_cleanup(void)
3877{
3878        unregister_netdevice_notifier(&pktgen_notifier_block);
3879        unregister_pernet_subsys(&pg_net_ops);
3880        /* Don't need rcu_barrier() due to use of kfree_rcu() */
3881}
3882
3883module_init(pg_init);
3884module_exit(pg_cleanup);
3885
3886MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3887MODULE_DESCRIPTION("Packet Generator tool");
3888MODULE_LICENSE("GPL");
3889MODULE_VERSION(VERSION);
3890module_param(pg_count_d, int, 0);
3891MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3892module_param(pg_delay_d, int, 0);
3893MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3894module_param(pg_clone_skb_d, int, 0);
3895MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3896module_param(debug, int, 0);
3897MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
3898