~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/core/pktgen.c

Version: ~ [ linux-5.3-rc4 ] ~ [ linux-5.2.8 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.66 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.138 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.189 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.189 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.71 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Authors:
  3  * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
  4  *                             Uppsala University and
  5  *                             Swedish University of Agricultural Sciences
  6  *
  7  * Alexey Kuznetsov  <kuznet@ms2.inr.ac.ru>
  8  * Ben Greear <greearb@candelatech.com>
  9  * Jens Låås <jens.laas@data.slu.se>
 10  *
 11  * This program is free software; you can redistribute it and/or
 12  * modify it under the terms of the GNU General Public License
 13  * as published by the Free Software Foundation; either version
 14  * 2 of the License, or (at your option) any later version.
 15  *
 16  *
 17  * A tool for loading the network with preconfigurated packets.
 18  * The tool is implemented as a linux module.  Parameters are output
 19  * device, delay (to hard_xmit), number of packets, and whether
 20  * to use multiple SKBs or just the same one.
 21  * pktgen uses the installed interface's output routine.
 22  *
 23  * Additional hacking by:
 24  *
 25  * Jens.Laas@data.slu.se
 26  * Improved by ANK. 010120.
 27  * Improved by ANK even more. 010212.
 28  * MAC address typo fixed. 010417 --ro
 29  * Integrated.  020301 --DaveM
 30  * Added multiskb option 020301 --DaveM
 31  * Scaling of results. 020417--sigurdur@linpro.no
 32  * Significant re-work of the module:
 33  *   *  Convert to threaded model to more efficiently be able to transmit
 34  *       and receive on multiple interfaces at once.
 35  *   *  Converted many counters to __u64 to allow longer runs.
 36  *   *  Allow configuration of ranges, like min/max IP address, MACs,
 37  *       and UDP-ports, for both source and destination, and can
 38  *       set to use a random distribution or sequentially walk the range.
 39  *   *  Can now change most values after starting.
 40  *   *  Place 12-byte packet in UDP payload with magic number,
 41  *       sequence number, and timestamp.
 42  *   *  Add receiver code that detects dropped pkts, re-ordered pkts, and
 43  *       latencies (with micro-second) precision.
 44  *   *  Add IOCTL interface to easily get counters & configuration.
 45  *   --Ben Greear <greearb@candelatech.com>
 46  *
 47  * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
 48  * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
 49  * as a "fastpath" with a configurable number of clones after alloc's.
 50  * clone_skb=0 means all packets are allocated this also means ranges time
 51  * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
 52  * clones.
 53  *
 54  * Also moved to /proc/net/pktgen/
 55  * --ro
 56  *
 57  * Sept 10:  Fixed threading/locking.  Lots of bone-headed and more clever
 58  *    mistakes.  Also merged in DaveM's patch in the -pre6 patch.
 59  * --Ben Greear <greearb@candelatech.com>
 60  *
 61  * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
 62  *
 63  *
 64  * 021124 Finished major redesign and rewrite for new functionality.
 65  * See Documentation/networking/pktgen.txt for how to use this.
 66  *
 67  * The new operation:
 68  * For each CPU one thread/process is created at start. This process checks
 69  * for running devices in the if_list and sends packets until count is 0 it
 70  * also the thread checks the thread->control which is used for inter-process
 71  * communication. controlling process "posts" operations to the threads this
 72  * way. The if_lock should be possible to remove when add/rem_device is merged
 73  * into this too.
 74  *
 75  * By design there should only be *one* "controlling" process. In practice
 76  * multiple write accesses gives unpredictable result. Understood by "write"
 77  * to /proc gives result code thats should be read be the "writer".
 78  * For practical use this should be no problem.
 79  *
 80  * Note when adding devices to a specific CPU there good idea to also assign
 81  * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
 82  * --ro
 83  *
 84  * Fix refcount off by one if first packet fails, potential null deref,
 85  * memleak 030710- KJP
 86  *
 87  * First "ranges" functionality for ipv6 030726 --ro
 88  *
 89  * Included flow support. 030802 ANK.
 90  *
 91  * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
 92  *
 93  * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
 94  * ia64 compilation fix from  Aron Griffis <aron@hp.com> 040604
 95  *
 96  * New xmit() return, do_div and misc clean up by Stephen Hemminger
 97  * <shemminger@osdl.org> 040923
 98  *
 99  * Randy Dunlap fixed u64 printk compiler waring
100  *
101  * Remove FCS from BW calculation.  Lennert Buytenhek <buytenh@wantstofly.org>
102  * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103  *
104  * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105  * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106  *
107  * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108  * 050103
109  *
110  * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111  *
112  * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113  *
114  * Fixed src_mac command to set source mac of packet to value specified in
115  * command by Adit Ranadive <adit.262@gmail.com>
116  *
117  */
118 
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120 
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/addrconf.h>
164 #ifdef CONFIG_XFRM
165 #include <net/xfrm.h>
166 #endif
167 #include <asm/byteorder.h>
168 #include <linux/rcupdate.h>
169 #include <linux/bitops.h>
170 #include <linux/io.h>
171 #include <linux/timex.h>
172 #include <linux/uaccess.h>
173 #include <asm/dma.h>
174 #include <asm/div64.h>          /* do_div */
175 
176 #define VERSION "2.74"
177 #define IP_NAME_SZ 32
178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179 #define MPLS_STACK_BOTTOM htonl(0x00000100)
180 
181 #define func_enter() pr_debug("entering %s\n", __func__);
182 
183 /* Device flag bits */
184 #define F_IPSRC_RND   (1<<0)    /* IP-Src Random  */
185 #define F_IPDST_RND   (1<<1)    /* IP-Dst Random  */
186 #define F_UDPSRC_RND  (1<<2)    /* UDP-Src Random */
187 #define F_UDPDST_RND  (1<<3)    /* UDP-Dst Random */
188 #define F_MACSRC_RND  (1<<4)    /* MAC-Src Random */
189 #define F_MACDST_RND  (1<<5)    /* MAC-Dst Random */
190 #define F_TXSIZE_RND  (1<<6)    /* Transmit size is random */
191 #define F_IPV6        (1<<7)    /* Interface in IPV6 Mode */
192 #define F_MPLS_RND    (1<<8)    /* Random MPLS labels */
193 #define F_VID_RND     (1<<9)    /* Random VLAN ID */
194 #define F_SVID_RND    (1<<10)   /* Random SVLAN ID */
195 #define F_FLOW_SEQ    (1<<11)   /* Sequential flows */
196 #define F_IPSEC_ON    (1<<12)   /* ipsec on for flows */
197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199 #define F_NODE          (1<<15) /* Node memory alloc*/
200 
201 /* Thread control flag bits */
202 #define T_STOP        (1<<0)    /* Stop run */
203 #define T_RUN         (1<<1)    /* Start run */
204 #define T_REMDEVALL   (1<<2)    /* Remove all devs */
205 #define T_REMDEV      (1<<3)    /* Remove one dev */
206 
207 /* If lock -- can be removed after some work */
208 #define   if_lock(t)           spin_lock(&(t->if_lock));
209 #define   if_unlock(t)           spin_unlock(&(t->if_lock));
210 
211 /* Used to help with determining the pkts on receive */
212 #define PKTGEN_MAGIC 0xbe9be955
213 #define PG_PROC_DIR "pktgen"
214 #define PGCTRL      "pgctrl"
215 static struct proc_dir_entry *pg_proc_dir;
216 
217 #define MAX_CFLOWS  65536
218 
219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
221 
222 struct flow_state {
223         __be32 cur_daddr;
224         int count;
225 #ifdef CONFIG_XFRM
226         struct xfrm_state *x;
227 #endif
228         __u32 flags;
229 };
230 
231 /* flow flag bits */
232 #define F_INIT   (1<<0)         /* flow has been initialized */
233 
234 struct pktgen_dev {
235         /*
236          * Try to keep frequent/infrequent used vars. separated.
237          */
238         struct proc_dir_entry *entry;   /* proc file */
239         struct pktgen_thread *pg_thread;/* the owner */
240         struct list_head list;          /* chaining in the thread's run-queue */
241 
242         int running;            /* if false, the test will stop */
243 
244         /* If min != max, then we will either do a linear iteration, or
245          * we will do a random selection from within the range.
246          */
247         __u32 flags;
248         int removal_mark;       /* non-zero => the device is marked for
249                                  * removal by worker thread */
250 
251         int min_pkt_size;       /* = ETH_ZLEN; */
252         int max_pkt_size;       /* = ETH_ZLEN; */
253         int pkt_overhead;       /* overhead for MPLS, VLANs, IPSEC etc */
254         int nfrags;
255         struct page *page;
256         u64 delay;              /* nano-seconds */
257 
258         __u64 count;            /* Default No packets to send */
259         __u64 sofar;            /* How many pkts we've sent so far */
260         __u64 tx_bytes;         /* How many bytes we've transmitted */
261         __u64 errors;           /* Errors when trying to transmit, */
262 
263         /* runtime counters relating to clone_skb */
264 
265         __u64 allocated_skbs;
266         __u32 clone_count;
267         int last_ok;            /* Was last skb sent?
268                                  * Or a failed transmit of some sort?
269                                  * This will keep sequence numbers in order
270                                  */
271         ktime_t next_tx;
272         ktime_t started_at;
273         ktime_t stopped_at;
274         u64     idle_acc;       /* nano-seconds */
275 
276         __u32 seq_num;
277 
278         int clone_skb;          /*
279                                  * Use multiple SKBs during packet gen.
280                                  * If this number is greater than 1, then
281                                  * that many copies of the same packet will be
282                                  * sent before a new packet is allocated.
283                                  * If you want to send 1024 identical packets
284                                  * before creating a new packet,
285                                  * set clone_skb to 1024.
286                                  */
287 
288         char dst_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
289         char dst_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
290         char src_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
291         char src_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
292 
293         struct in6_addr in6_saddr;
294         struct in6_addr in6_daddr;
295         struct in6_addr cur_in6_daddr;
296         struct in6_addr cur_in6_saddr;
297         /* For ranges */
298         struct in6_addr min_in6_daddr;
299         struct in6_addr max_in6_daddr;
300         struct in6_addr min_in6_saddr;
301         struct in6_addr max_in6_saddr;
302 
303         /* If we're doing ranges, random or incremental, then this
304          * defines the min/max for those ranges.
305          */
306         __be32 saddr_min;       /* inclusive, source IP address */
307         __be32 saddr_max;       /* exclusive, source IP address */
308         __be32 daddr_min;       /* inclusive, dest IP address */
309         __be32 daddr_max;       /* exclusive, dest IP address */
310 
311         __u16 udp_src_min;      /* inclusive, source UDP port */
312         __u16 udp_src_max;      /* exclusive, source UDP port */
313         __u16 udp_dst_min;      /* inclusive, dest UDP port */
314         __u16 udp_dst_max;      /* exclusive, dest UDP port */
315 
316         /* DSCP + ECN */
317         __u8 tos;            /* six MSB of (former) IPv4 TOS
318                                 are for dscp codepoint */
319         __u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6
320                                 (see RFC 3260, sec. 4) */
321 
322         /* MPLS */
323         unsigned nr_labels;     /* Depth of stack, 0 = no MPLS */
324         __be32 labels[MAX_MPLS_LABELS];
325 
326         /* VLAN/SVLAN (802.1Q/Q-in-Q) */
327         __u8  vlan_p;
328         __u8  vlan_cfi;
329         __u16 vlan_id;  /* 0xffff means no vlan tag */
330 
331         __u8  svlan_p;
332         __u8  svlan_cfi;
333         __u16 svlan_id; /* 0xffff means no svlan tag */
334 
335         __u32 src_mac_count;    /* How many MACs to iterate through */
336         __u32 dst_mac_count;    /* How many MACs to iterate through */
337 
338         unsigned char dst_mac[ETH_ALEN];
339         unsigned char src_mac[ETH_ALEN];
340 
341         __u32 cur_dst_mac_offset;
342         __u32 cur_src_mac_offset;
343         __be32 cur_saddr;
344         __be32 cur_daddr;
345         __u16 ip_id;
346         __u16 cur_udp_dst;
347         __u16 cur_udp_src;
348         __u16 cur_queue_map;
349         __u32 cur_pkt_size;
350         __u32 last_pkt_size;
351 
352         __u8 hh[14];
353         /* = {
354            0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
355 
356            We fill in SRC address later
357            0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
358            0x08, 0x00
359            };
360          */
361         __u16 pad;              /* pad out the hh struct to an even 16 bytes */
362 
363         struct sk_buff *skb;    /* skb we are to transmit next, used for when we
364                                  * are transmitting the same one multiple times
365                                  */
366         struct net_device *odev; /* The out-going device.
367                                   * Note that the device should have it's
368                                   * pg_info pointer pointing back to this
369                                   * device.
370                                   * Set when the user specifies the out-going
371                                   * device name (not when the inject is
372                                   * started as it used to do.)
373                                   */
374         char odevname[32];
375         struct flow_state *flows;
376         unsigned cflows;        /* Concurrent flows (config) */
377         unsigned lflow;         /* Flow length  (config) */
378         unsigned nflows;        /* accumulated flows (stats) */
379         unsigned curfl;         /* current sequenced flow (state)*/
380 
381         u16 queue_map_min;
382         u16 queue_map_max;
383         __u32 skb_priority;     /* skb priority field */
384         int node;               /* Memory node */
385 
386 #ifdef CONFIG_XFRM
387         __u8    ipsmode;                /* IPSEC mode (config) */
388         __u8    ipsproto;               /* IPSEC type (config) */
389 #endif
390         char result[512];
391 };
392 
393 struct pktgen_hdr {
394         __be32 pgh_magic;
395         __be32 seq_num;
396         __be32 tv_sec;
397         __be32 tv_usec;
398 };
399 
400 static bool pktgen_exiting __read_mostly;
401 
402 struct pktgen_thread {
403         spinlock_t if_lock;             /* for list of devices */
404         struct list_head if_list;       /* All device here */
405         struct list_head th_list;
406         struct task_struct *tsk;
407         char result[512];
408 
409         /* Field for thread to receive "posted" events terminate,
410            stop ifs etc. */
411 
412         u32 control;
413         int cpu;
414 
415         wait_queue_head_t queue;
416         struct completion start_done;
417 };
418 
419 #define REMOVE 1
420 #define FIND   0
421 
422 static inline ktime_t ktime_now(void)
423 {
424         struct timespec ts;
425         ktime_get_ts(&ts);
426 
427         return timespec_to_ktime(ts);
428 }
429 
430 /* This works even if 32 bit because of careful byte order choice */
431 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
432 {
433         return cmp1.tv64 < cmp2.tv64;
434 }
435 
436 static const char version[] =
437         "Packet Generator for packet performance testing. "
438         "Version: " VERSION "\n";
439 
440 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
441 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
442 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
443                                           const char *ifname, bool exact);
444 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
445 static void pktgen_run_all_threads(void);
446 static void pktgen_reset_all_threads(void);
447 static void pktgen_stop_all_threads_ifs(void);
448 
449 static void pktgen_stop(struct pktgen_thread *t);
450 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
451 
452 static unsigned int scan_ip6(const char *s, char ip[16]);
453 
454 /* Module parameters, defaults. */
455 static int pg_count_d __read_mostly = 1000;
456 static int pg_delay_d __read_mostly;
457 static int pg_clone_skb_d  __read_mostly;
458 static int debug  __read_mostly;
459 
460 static DEFINE_MUTEX(pktgen_thread_lock);
461 static LIST_HEAD(pktgen_threads);
462 
463 static struct notifier_block pktgen_notifier_block = {
464         .notifier_call = pktgen_device_event,
465 };
466 
467 /*
468  * /proc handling functions
469  *
470  */
471 
472 static int pgctrl_show(struct seq_file *seq, void *v)
473 {
474         seq_puts(seq, version);
475         return 0;
476 }
477 
478 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
479                             size_t count, loff_t *ppos)
480 {
481         int err = 0;
482         char data[128];
483 
484         if (!capable(CAP_NET_ADMIN)) {
485                 err = -EPERM;
486                 goto out;
487         }
488 
489         if (count > sizeof(data))
490                 count = sizeof(data);
491 
492         if (copy_from_user(data, buf, count)) {
493                 err = -EFAULT;
494                 goto out;
495         }
496         data[count - 1] = 0;    /* Make string */
497 
498         if (!strcmp(data, "stop"))
499                 pktgen_stop_all_threads_ifs();
500 
501         else if (!strcmp(data, "start"))
502                 pktgen_run_all_threads();
503 
504         else if (!strcmp(data, "reset"))
505                 pktgen_reset_all_threads();
506 
507         else
508                 pr_warning("Unknown command: %s\n", data);
509 
510         err = count;
511 
512 out:
513         return err;
514 }
515 
516 static int pgctrl_open(struct inode *inode, struct file *file)
517 {
518         return single_open(file, pgctrl_show, PDE(inode)->data);
519 }
520 
521 static const struct file_operations pktgen_fops = {
522         .owner   = THIS_MODULE,
523         .open    = pgctrl_open,
524         .read    = seq_read,
525         .llseek  = seq_lseek,
526         .write   = pgctrl_write,
527         .release = single_release,
528 };
529 
530 static int pktgen_if_show(struct seq_file *seq, void *v)
531 {
532         const struct pktgen_dev *pkt_dev = seq->private;
533         ktime_t stopped;
534         u64 idle;
535 
536         seq_printf(seq,
537                    "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
538                    (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
539                    pkt_dev->max_pkt_size);
540 
541         seq_printf(seq,
542                    "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
543                    pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
544                    pkt_dev->clone_skb, pkt_dev->odevname);
545 
546         seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
547                    pkt_dev->lflow);
548 
549         seq_printf(seq,
550                    "     queue_map_min: %u  queue_map_max: %u\n",
551                    pkt_dev->queue_map_min,
552                    pkt_dev->queue_map_max);
553 
554         if (pkt_dev->skb_priority)
555                 seq_printf(seq, "     skb_priority: %u\n",
556                            pkt_dev->skb_priority);
557 
558         if (pkt_dev->flags & F_IPV6) {
559                 seq_printf(seq,
560                            "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
561                            "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
562                            &pkt_dev->in6_saddr,
563                            &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
564                            &pkt_dev->in6_daddr,
565                            &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
566         } else {
567                 seq_printf(seq,
568                            "     dst_min: %s  dst_max: %s\n",
569                            pkt_dev->dst_min, pkt_dev->dst_max);
570                 seq_printf(seq,
571                            "     src_min: %s  src_max: %s\n",
572                            pkt_dev->src_min, pkt_dev->src_max);
573         }
574 
575         seq_puts(seq, "     src_mac: ");
576 
577         seq_printf(seq, "%pM ",
578                    is_zero_ether_addr(pkt_dev->src_mac) ?
579                              pkt_dev->odev->dev_addr : pkt_dev->src_mac);
580 
581         seq_printf(seq, "dst_mac: ");
582         seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
583 
584         seq_printf(seq,
585                    "     udp_src_min: %d  udp_src_max: %d"
586                    "  udp_dst_min: %d  udp_dst_max: %d\n",
587                    pkt_dev->udp_src_min, pkt_dev->udp_src_max,
588                    pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
589 
590         seq_printf(seq,
591                    "     src_mac_count: %d  dst_mac_count: %d\n",
592                    pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
593 
594         if (pkt_dev->nr_labels) {
595                 unsigned i;
596                 seq_printf(seq, "     mpls: ");
597                 for (i = 0; i < pkt_dev->nr_labels; i++)
598                         seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
599                                    i == pkt_dev->nr_labels-1 ? "\n" : ", ");
600         }
601 
602         if (pkt_dev->vlan_id != 0xffff)
603                 seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
604                            pkt_dev->vlan_id, pkt_dev->vlan_p,
605                            pkt_dev->vlan_cfi);
606 
607         if (pkt_dev->svlan_id != 0xffff)
608                 seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
609                            pkt_dev->svlan_id, pkt_dev->svlan_p,
610                            pkt_dev->svlan_cfi);
611 
612         if (pkt_dev->tos)
613                 seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
614 
615         if (pkt_dev->traffic_class)
616                 seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
617 
618         if (pkt_dev->node >= 0)
619                 seq_printf(seq, "     node: %d\n", pkt_dev->node);
620 
621         seq_printf(seq, "     Flags: ");
622 
623         if (pkt_dev->flags & F_IPV6)
624                 seq_printf(seq, "IPV6  ");
625 
626         if (pkt_dev->flags & F_IPSRC_RND)
627                 seq_printf(seq, "IPSRC_RND  ");
628 
629         if (pkt_dev->flags & F_IPDST_RND)
630                 seq_printf(seq, "IPDST_RND  ");
631 
632         if (pkt_dev->flags & F_TXSIZE_RND)
633                 seq_printf(seq, "TXSIZE_RND  ");
634 
635         if (pkt_dev->flags & F_UDPSRC_RND)
636                 seq_printf(seq, "UDPSRC_RND  ");
637 
638         if (pkt_dev->flags & F_UDPDST_RND)
639                 seq_printf(seq, "UDPDST_RND  ");
640 
641         if (pkt_dev->flags & F_MPLS_RND)
642                 seq_printf(seq,  "MPLS_RND  ");
643 
644         if (pkt_dev->flags & F_QUEUE_MAP_RND)
645                 seq_printf(seq,  "QUEUE_MAP_RND  ");
646 
647         if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648                 seq_printf(seq,  "QUEUE_MAP_CPU  ");
649 
650         if (pkt_dev->cflows) {
651                 if (pkt_dev->flags & F_FLOW_SEQ)
652                         seq_printf(seq,  "FLOW_SEQ  "); /*in sequence flows*/
653                 else
654                         seq_printf(seq,  "FLOW_RND  ");
655         }
656 
657 #ifdef CONFIG_XFRM
658         if (pkt_dev->flags & F_IPSEC_ON)
659                 seq_printf(seq,  "IPSEC  ");
660 #endif
661 
662         if (pkt_dev->flags & F_MACSRC_RND)
663                 seq_printf(seq, "MACSRC_RND  ");
664 
665         if (pkt_dev->flags & F_MACDST_RND)
666                 seq_printf(seq, "MACDST_RND  ");
667 
668         if (pkt_dev->flags & F_VID_RND)
669                 seq_printf(seq, "VID_RND  ");
670 
671         if (pkt_dev->flags & F_SVID_RND)
672                 seq_printf(seq, "SVID_RND  ");
673 
674         if (pkt_dev->flags & F_NODE)
675                 seq_printf(seq, "NODE_ALLOC  ");
676 
677         seq_puts(seq, "\n");
678 
679         /* not really stopped, more like last-running-at */
680         stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
681         idle = pkt_dev->idle_acc;
682         do_div(idle, NSEC_PER_USEC);
683 
684         seq_printf(seq,
685                    "Current:\n     pkts-sofar: %llu  errors: %llu\n",
686                    (unsigned long long)pkt_dev->sofar,
687                    (unsigned long long)pkt_dev->errors);
688 
689         seq_printf(seq,
690                    "     started: %lluus  stopped: %lluus idle: %lluus\n",
691                    (unsigned long long) ktime_to_us(pkt_dev->started_at),
692                    (unsigned long long) ktime_to_us(stopped),
693                    (unsigned long long) idle);
694 
695         seq_printf(seq,
696                    "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
697                    pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698                    pkt_dev->cur_src_mac_offset);
699 
700         if (pkt_dev->flags & F_IPV6) {
701                 seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
702                                 &pkt_dev->cur_in6_saddr,
703                                 &pkt_dev->cur_in6_daddr);
704         } else
705                 seq_printf(seq, "     cur_saddr: 0x%x  cur_daddr: 0x%x\n",
706                            pkt_dev->cur_saddr, pkt_dev->cur_daddr);
707 
708         seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
709                    pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
710 
711         seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
712 
713         seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
714 
715         if (pkt_dev->result[0])
716                 seq_printf(seq, "Result: %s\n", pkt_dev->result);
717         else
718                 seq_printf(seq, "Result: Idle\n");
719 
720         return 0;
721 }
722 
723 
724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
725                      __u32 *num)
726 {
727         int i = 0;
728         *num = 0;
729 
730         for (; i < maxlen; i++) {
731                 int value;
732                 char c;
733                 *num <<= 4;
734                 if (get_user(c, &user_buffer[i]))
735                         return -EFAULT;
736                 value = hex_to_bin(c);
737                 if (value >= 0)
738                         *num |= value;
739                 else
740                         break;
741         }
742         return i;
743 }
744 
745 static int count_trail_chars(const char __user * user_buffer,
746                              unsigned int maxlen)
747 {
748         int i;
749 
750         for (i = 0; i < maxlen; i++) {
751                 char c;
752                 if (get_user(c, &user_buffer[i]))
753                         return -EFAULT;
754                 switch (c) {
755                 case '\"':
756                 case '\n':
757                 case '\r':
758                 case '\t':
759                 case ' ':
760                 case '=':
761                         break;
762                 default:
763                         goto done;
764                 }
765         }
766 done:
767         return i;
768 }
769 
770 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
771                                 unsigned long *num)
772 {
773         int i;
774         *num = 0;
775 
776         for (i = 0; i < maxlen; i++) {
777                 char c;
778                 if (get_user(c, &user_buffer[i]))
779                         return -EFAULT;
780                 if ((c >= '') && (c <= '9')) {
781                         *num *= 10;
782                         *num += c - '';
783                 } else
784                         break;
785         }
786         return i;
787 }
788 
789 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
790 {
791         int i;
792 
793         for (i = 0; i < maxlen; i++) {
794                 char c;
795                 if (get_user(c, &user_buffer[i]))
796                         return -EFAULT;
797                 switch (c) {
798                 case '\"':
799                 case '\n':
800                 case '\r':
801                 case '\t':
802                 case ' ':
803                         goto done_str;
804                         break;
805                 default:
806                         break;
807                 }
808         }
809 done_str:
810         return i;
811 }
812 
813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
814 {
815         unsigned n = 0;
816         char c;
817         ssize_t i = 0;
818         int len;
819 
820         pkt_dev->nr_labels = 0;
821         do {
822                 __u32 tmp;
823                 len = hex32_arg(&buffer[i], 8, &tmp);
824                 if (len <= 0)
825                         return len;
826                 pkt_dev->labels[n] = htonl(tmp);
827                 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
828                         pkt_dev->flags |= F_MPLS_RND;
829                 i += len;
830                 if (get_user(c, &buffer[i]))
831                         return -EFAULT;
832                 i++;
833                 n++;
834                 if (n >= MAX_MPLS_LABELS)
835                         return -E2BIG;
836         } while (c == ',');
837 
838         pkt_dev->nr_labels = n;
839         return i;
840 }
841 
842 static ssize_t pktgen_if_write(struct file *file,
843                                const char __user * user_buffer, size_t count,
844                                loff_t * offset)
845 {
846         struct seq_file *seq = file->private_data;
847         struct pktgen_dev *pkt_dev = seq->private;
848         int i, max, len;
849         char name[16], valstr[32];
850         unsigned long value = 0;
851         char *pg_result = NULL;
852         int tmp = 0;
853         char buf[128];
854 
855         pg_result = &(pkt_dev->result[0]);
856 
857         if (count < 1) {
858                 pr_warning("wrong command format\n");
859                 return -EINVAL;
860         }
861 
862         max = count;
863         tmp = count_trail_chars(user_buffer, max);
864         if (tmp < 0) {
865                 pr_warning("illegal format\n");
866                 return tmp;
867         }
868         i = tmp;
869 
870         /* Read variable name */
871 
872         len = strn_len(&user_buffer[i], sizeof(name) - 1);
873         if (len < 0)
874                 return len;
875 
876         memset(name, 0, sizeof(name));
877         if (copy_from_user(name, &user_buffer[i], len))
878                 return -EFAULT;
879         i += len;
880 
881         max = count - i;
882         len = count_trail_chars(&user_buffer[i], max);
883         if (len < 0)
884                 return len;
885 
886         i += len;
887 
888         if (debug) {
889                 size_t copy = min_t(size_t, count, 1023);
890                 char tb[copy + 1];
891                 if (copy_from_user(tb, user_buffer, copy))
892                         return -EFAULT;
893                 tb[copy] = 0;
894                 printk(KERN_DEBUG "pktgen: %s,%lu  buffer -:%s:-\n", name,
895                        (unsigned long)count, tb);
896         }
897 
898         if (!strcmp(name, "min_pkt_size")) {
899                 len = num_arg(&user_buffer[i], 10, &value);
900                 if (len < 0)
901                         return len;
902 
903                 i += len;
904                 if (value < 14 + 20 + 8)
905                         value = 14 + 20 + 8;
906                 if (value != pkt_dev->min_pkt_size) {
907                         pkt_dev->min_pkt_size = value;
908                         pkt_dev->cur_pkt_size = value;
909                 }
910                 sprintf(pg_result, "OK: min_pkt_size=%u",
911                         pkt_dev->min_pkt_size);
912                 return count;
913         }
914 
915         if (!strcmp(name, "max_pkt_size")) {
916                 len = num_arg(&user_buffer[i], 10, &value);
917                 if (len < 0)
918                         return len;
919 
920                 i += len;
921                 if (value < 14 + 20 + 8)
922                         value = 14 + 20 + 8;
923                 if (value != pkt_dev->max_pkt_size) {
924                         pkt_dev->max_pkt_size = value;
925                         pkt_dev->cur_pkt_size = value;
926                 }
927                 sprintf(pg_result, "OK: max_pkt_size=%u",
928                         pkt_dev->max_pkt_size);
929                 return count;
930         }
931 
932         /* Shortcut for min = max */
933 
934         if (!strcmp(name, "pkt_size")) {
935                 len = num_arg(&user_buffer[i], 10, &value);
936                 if (len < 0)
937                         return len;
938 
939                 i += len;
940                 if (value < 14 + 20 + 8)
941                         value = 14 + 20 + 8;
942                 if (value != pkt_dev->min_pkt_size) {
943                         pkt_dev->min_pkt_size = value;
944                         pkt_dev->max_pkt_size = value;
945                         pkt_dev->cur_pkt_size = value;
946                 }
947                 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
948                 return count;
949         }
950 
951         if (!strcmp(name, "debug")) {
952                 len = num_arg(&user_buffer[i], 10, &value);
953                 if (len < 0)
954                         return len;
955 
956                 i += len;
957                 debug = value;
958                 sprintf(pg_result, "OK: debug=%u", debug);
959                 return count;
960         }
961 
962         if (!strcmp(name, "frags")) {
963                 len = num_arg(&user_buffer[i], 10, &value);
964                 if (len < 0)
965                         return len;
966 
967                 i += len;
968                 pkt_dev->nfrags = value;
969                 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
970                 return count;
971         }
972         if (!strcmp(name, "delay")) {
973                 len = num_arg(&user_buffer[i], 10, &value);
974                 if (len < 0)
975                         return len;
976 
977                 i += len;
978                 if (value == 0x7FFFFFFF)
979                         pkt_dev->delay = ULLONG_MAX;
980                 else
981                         pkt_dev->delay = (u64)value;
982 
983                 sprintf(pg_result, "OK: delay=%llu",
984                         (unsigned long long) pkt_dev->delay);
985                 return count;
986         }
987         if (!strcmp(name, "rate")) {
988                 len = num_arg(&user_buffer[i], 10, &value);
989                 if (len < 0)
990                         return len;
991 
992                 i += len;
993                 if (!value)
994                         return len;
995                 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
996                 if (debug)
997                         pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
998 
999                 sprintf(pg_result, "OK: rate=%lu", value);
1000                 return count;
1001         }
1002         if (!strcmp(name, "ratep")) {
1003                 len = num_arg(&user_buffer[i], 10, &value);
1004                 if (len < 0)
1005                         return len;
1006 
1007                 i += len;
1008                 if (!value)
1009                         return len;
1010                 pkt_dev->delay = NSEC_PER_SEC/value;
1011                 if (debug)
1012                         pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013 
1014                 sprintf(pg_result, "OK: rate=%lu", value);
1015                 return count;
1016         }
1017         if (!strcmp(name, "udp_src_min")) {
1018                 len = num_arg(&user_buffer[i], 10, &value);
1019                 if (len < 0)
1020                         return len;
1021 
1022                 i += len;
1023                 if (value != pkt_dev->udp_src_min) {
1024                         pkt_dev->udp_src_min = value;
1025                         pkt_dev->cur_udp_src = value;
1026                 }
1027                 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1028                 return count;
1029         }
1030         if (!strcmp(name, "udp_dst_min")) {
1031                 len = num_arg(&user_buffer[i], 10, &value);
1032                 if (len < 0)
1033                         return len;
1034 
1035                 i += len;
1036                 if (value != pkt_dev->udp_dst_min) {
1037                         pkt_dev->udp_dst_min = value;
1038                         pkt_dev->cur_udp_dst = value;
1039                 }
1040                 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1041                 return count;
1042         }
1043         if (!strcmp(name, "udp_src_max")) {
1044                 len = num_arg(&user_buffer[i], 10, &value);
1045                 if (len < 0)
1046                         return len;
1047 
1048                 i += len;
1049                 if (value != pkt_dev->udp_src_max) {
1050                         pkt_dev->udp_src_max = value;
1051                         pkt_dev->cur_udp_src = value;
1052                 }
1053                 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1054                 return count;
1055         }
1056         if (!strcmp(name, "udp_dst_max")) {
1057                 len = num_arg(&user_buffer[i], 10, &value);
1058                 if (len < 0)
1059                         return len;
1060 
1061                 i += len;
1062                 if (value != pkt_dev->udp_dst_max) {
1063                         pkt_dev->udp_dst_max = value;
1064                         pkt_dev->cur_udp_dst = value;
1065                 }
1066                 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1067                 return count;
1068         }
1069         if (!strcmp(name, "clone_skb")) {
1070                 len = num_arg(&user_buffer[i], 10, &value);
1071                 if (len < 0)
1072                         return len;
1073                 if ((value > 0) &&
1074                     (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1075                         return -ENOTSUPP;
1076                 i += len;
1077                 pkt_dev->clone_skb = value;
1078 
1079                 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080                 return count;
1081         }
1082         if (!strcmp(name, "count")) {
1083                 len = num_arg(&user_buffer[i], 10, &value);
1084                 if (len < 0)
1085                         return len;
1086 
1087                 i += len;
1088                 pkt_dev->count = value;
1089                 sprintf(pg_result, "OK: count=%llu",
1090                         (unsigned long long)pkt_dev->count);
1091                 return count;
1092         }
1093         if (!strcmp(name, "src_mac_count")) {
1094                 len = num_arg(&user_buffer[i], 10, &value);
1095                 if (len < 0)
1096                         return len;
1097 
1098                 i += len;
1099                 if (pkt_dev->src_mac_count != value) {
1100                         pkt_dev->src_mac_count = value;
1101                         pkt_dev->cur_src_mac_offset = 0;
1102                 }
1103                 sprintf(pg_result, "OK: src_mac_count=%d",
1104                         pkt_dev->src_mac_count);
1105                 return count;
1106         }
1107         if (!strcmp(name, "dst_mac_count")) {
1108                 len = num_arg(&user_buffer[i], 10, &value);
1109                 if (len < 0)
1110                         return len;
1111 
1112                 i += len;
1113                 if (pkt_dev->dst_mac_count != value) {
1114                         pkt_dev->dst_mac_count = value;
1115                         pkt_dev->cur_dst_mac_offset = 0;
1116                 }
1117                 sprintf(pg_result, "OK: dst_mac_count=%d",
1118                         pkt_dev->dst_mac_count);
1119                 return count;
1120         }
1121         if (!strcmp(name, "node")) {
1122                 len = num_arg(&user_buffer[i], 10, &value);
1123                 if (len < 0)
1124                         return len;
1125 
1126                 i += len;
1127 
1128                 if (node_possible(value)) {
1129                         pkt_dev->node = value;
1130                         sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131                         if (pkt_dev->page) {
1132                                 put_page(pkt_dev->page);
1133                                 pkt_dev->page = NULL;
1134                         }
1135                 }
1136                 else
1137                         sprintf(pg_result, "ERROR: node not possible");
1138                 return count;
1139         }
1140         if (!strcmp(name, "flag")) {
1141                 char f[32];
1142                 memset(f, 0, 32);
1143                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1144                 if (len < 0)
1145                         return len;
1146 
1147                 if (copy_from_user(f, &user_buffer[i], len))
1148                         return -EFAULT;
1149                 i += len;
1150                 if (strcmp(f, "IPSRC_RND") == 0)
1151                         pkt_dev->flags |= F_IPSRC_RND;
1152 
1153                 else if (strcmp(f, "!IPSRC_RND") == 0)
1154                         pkt_dev->flags &= ~F_IPSRC_RND;
1155 
1156                 else if (strcmp(f, "TXSIZE_RND") == 0)
1157                         pkt_dev->flags |= F_TXSIZE_RND;
1158 
1159                 else if (strcmp(f, "!TXSIZE_RND") == 0)
1160                         pkt_dev->flags &= ~F_TXSIZE_RND;
1161 
1162                 else if (strcmp(f, "IPDST_RND") == 0)
1163                         pkt_dev->flags |= F_IPDST_RND;
1164 
1165                 else if (strcmp(f, "!IPDST_RND") == 0)
1166                         pkt_dev->flags &= ~F_IPDST_RND;
1167 
1168                 else if (strcmp(f, "UDPSRC_RND") == 0)
1169                         pkt_dev->flags |= F_UDPSRC_RND;
1170 
1171                 else if (strcmp(f, "!UDPSRC_RND") == 0)
1172                         pkt_dev->flags &= ~F_UDPSRC_RND;
1173 
1174                 else if (strcmp(f, "UDPDST_RND") == 0)
1175                         pkt_dev->flags |= F_UDPDST_RND;
1176 
1177                 else if (strcmp(f, "!UDPDST_RND") == 0)
1178                         pkt_dev->flags &= ~F_UDPDST_RND;
1179 
1180                 else if (strcmp(f, "MACSRC_RND") == 0)
1181                         pkt_dev->flags |= F_MACSRC_RND;
1182 
1183                 else if (strcmp(f, "!MACSRC_RND") == 0)
1184                         pkt_dev->flags &= ~F_MACSRC_RND;
1185 
1186                 else if (strcmp(f, "MACDST_RND") == 0)
1187                         pkt_dev->flags |= F_MACDST_RND;
1188 
1189                 else if (strcmp(f, "!MACDST_RND") == 0)
1190                         pkt_dev->flags &= ~F_MACDST_RND;
1191 
1192                 else if (strcmp(f, "MPLS_RND") == 0)
1193                         pkt_dev->flags |= F_MPLS_RND;
1194 
1195                 else if (strcmp(f, "!MPLS_RND") == 0)
1196                         pkt_dev->flags &= ~F_MPLS_RND;
1197 
1198                 else if (strcmp(f, "VID_RND") == 0)
1199                         pkt_dev->flags |= F_VID_RND;
1200 
1201                 else if (strcmp(f, "!VID_RND") == 0)
1202                         pkt_dev->flags &= ~F_VID_RND;
1203 
1204                 else if (strcmp(f, "SVID_RND") == 0)
1205                         pkt_dev->flags |= F_SVID_RND;
1206 
1207                 else if (strcmp(f, "!SVID_RND") == 0)
1208                         pkt_dev->flags &= ~F_SVID_RND;
1209 
1210                 else if (strcmp(f, "FLOW_SEQ") == 0)
1211                         pkt_dev->flags |= F_FLOW_SEQ;
1212 
1213                 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214                         pkt_dev->flags |= F_QUEUE_MAP_RND;
1215 
1216                 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217                         pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1218 
1219                 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220                         pkt_dev->flags |= F_QUEUE_MAP_CPU;
1221 
1222                 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223                         pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1224 #ifdef CONFIG_XFRM
1225                 else if (strcmp(f, "IPSEC") == 0)
1226                         pkt_dev->flags |= F_IPSEC_ON;
1227 #endif
1228 
1229                 else if (strcmp(f, "!IPV6") == 0)
1230                         pkt_dev->flags &= ~F_IPV6;
1231 
1232                 else if (strcmp(f, "NODE_ALLOC") == 0)
1233                         pkt_dev->flags |= F_NODE;
1234 
1235                 else if (strcmp(f, "!NODE_ALLOC") == 0)
1236                         pkt_dev->flags &= ~F_NODE;
1237 
1238                 else {
1239                         sprintf(pg_result,
1240                                 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1241                                 f,
1242                                 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243                                 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1244                         return count;
1245                 }
1246                 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1247                 return count;
1248         }
1249         if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1251                 if (len < 0)
1252                         return len;
1253 
1254                 if (copy_from_user(buf, &user_buffer[i], len))
1255                         return -EFAULT;
1256                 buf[len] = 0;
1257                 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258                         memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259                         strncpy(pkt_dev->dst_min, buf, len);
1260                         pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261                         pkt_dev->cur_daddr = pkt_dev->daddr_min;
1262                 }
1263                 if (debug)
1264                         printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1265                                pkt_dev->dst_min);
1266                 i += len;
1267                 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1268                 return count;
1269         }
1270         if (!strcmp(name, "dst_max")) {
1271                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1272                 if (len < 0)
1273                         return len;
1274 
1275 
1276                 if (copy_from_user(buf, &user_buffer[i], len))
1277                         return -EFAULT;
1278 
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                         strncpy(pkt_dev->dst_max, buf, len);
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                         printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1288                                pkt_dev->dst_max);
1289                 i += len;
1290                 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1291                 return count;
1292         }
1293         if (!strcmp(name, "dst6")) {
1294                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1295                 if (len < 0)
1296                         return len;
1297 
1298                 pkt_dev->flags |= F_IPV6;
1299 
1300                 if (copy_from_user(buf, &user_buffer[i], len))
1301                         return -EFAULT;
1302                 buf[len] = 0;
1303 
1304                 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1305                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1306 
1307                 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1308 
1309                 if (debug)
1310                         printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1311 
1312                 i += len;
1313                 sprintf(pg_result, "OK: dst6=%s", buf);
1314                 return count;
1315         }
1316         if (!strcmp(name, "dst6_min")) {
1317                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1318                 if (len < 0)
1319                         return len;
1320 
1321                 pkt_dev->flags |= F_IPV6;
1322 
1323                 if (copy_from_user(buf, &user_buffer[i], len))
1324                         return -EFAULT;
1325                 buf[len] = 0;
1326 
1327                 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1328                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1329 
1330                 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1331                 if (debug)
1332                         printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1333 
1334                 i += len;
1335                 sprintf(pg_result, "OK: dst6_min=%s", buf);
1336                 return count;
1337         }
1338         if (!strcmp(name, "dst6_max")) {
1339                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1340                 if (len < 0)
1341                         return len;
1342 
1343                 pkt_dev->flags |= F_IPV6;
1344 
1345                 if (copy_from_user(buf, &user_buffer[i], len))
1346                         return -EFAULT;
1347                 buf[len] = 0;
1348 
1349                 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1350                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1351 
1352                 if (debug)
1353                         printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1354 
1355                 i += len;
1356                 sprintf(pg_result, "OK: dst6_max=%s", buf);
1357                 return count;
1358         }
1359         if (!strcmp(name, "src6")) {
1360                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1361                 if (len < 0)
1362                         return len;
1363 
1364                 pkt_dev->flags |= F_IPV6;
1365 
1366                 if (copy_from_user(buf, &user_buffer[i], len))
1367                         return -EFAULT;
1368                 buf[len] = 0;
1369 
1370                 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1371                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1372 
1373                 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1374 
1375                 if (debug)
1376                         printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1377 
1378                 i += len;
1379                 sprintf(pg_result, "OK: src6=%s", buf);
1380                 return count;
1381         }
1382         if (!strcmp(name, "src_min")) {
1383                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1384                 if (len < 0)
1385                         return len;
1386 
1387                 if (copy_from_user(buf, &user_buffer[i], len))
1388                         return -EFAULT;
1389                 buf[len] = 0;
1390                 if (strcmp(buf, pkt_dev->src_min) != 0) {
1391                         memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1392                         strncpy(pkt_dev->src_min, buf, len);
1393                         pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1394                         pkt_dev->cur_saddr = pkt_dev->saddr_min;
1395                 }
1396                 if (debug)
1397                         printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1398                                pkt_dev->src_min);
1399                 i += len;
1400                 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1401                 return count;
1402         }
1403         if (!strcmp(name, "src_max")) {
1404                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1405                 if (len < 0)
1406                         return len;
1407 
1408                 if (copy_from_user(buf, &user_buffer[i], len))
1409                         return -EFAULT;
1410                 buf[len] = 0;
1411                 if (strcmp(buf, pkt_dev->src_max) != 0) {
1412                         memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1413                         strncpy(pkt_dev->src_max, buf, len);
1414                         pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1415                         pkt_dev->cur_saddr = pkt_dev->saddr_max;
1416                 }
1417                 if (debug)
1418                         printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1419                                pkt_dev->src_max);
1420                 i += len;
1421                 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1422                 return count;
1423         }
1424         if (!strcmp(name, "dst_mac")) {
1425                 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1426                 if (len < 0)
1427                         return len;
1428 
1429                 memset(valstr, 0, sizeof(valstr));
1430                 if (copy_from_user(valstr, &user_buffer[i], len))
1431                         return -EFAULT;
1432 
1433                 if (!mac_pton(valstr, pkt_dev->dst_mac))
1434                         return -EINVAL;
1435                 /* Set up Dest MAC */
1436                 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1437 
1438                 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1439                 return count;
1440         }
1441         if (!strcmp(name, "src_mac")) {
1442                 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1443                 if (len < 0)
1444                         return len;
1445 
1446                 memset(valstr, 0, sizeof(valstr));
1447                 if (copy_from_user(valstr, &user_buffer[i], len))
1448                         return -EFAULT;
1449 
1450                 if (!mac_pton(valstr, pkt_dev->src_mac))
1451                         return -EINVAL;
1452                 /* Set up Src MAC */
1453                 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1454 
1455                 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1456                 return count;
1457         }
1458 
1459         if (!strcmp(name, "clear_counters")) {
1460                 pktgen_clear_counters(pkt_dev);
1461                 sprintf(pg_result, "OK: Clearing counters.\n");
1462                 return count;
1463         }
1464 
1465         if (!strcmp(name, "flows")) {
1466                 len = num_arg(&user_buffer[i], 10, &value);
1467                 if (len < 0)
1468                         return len;
1469 
1470                 i += len;
1471                 if (value > MAX_CFLOWS)
1472                         value = MAX_CFLOWS;
1473 
1474                 pkt_dev->cflows = value;
1475                 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1476                 return count;
1477         }
1478 
1479         if (!strcmp(name, "flowlen")) {
1480                 len = num_arg(&user_buffer[i], 10, &value);
1481                 if (len < 0)
1482                         return len;
1483 
1484                 i += len;
1485                 pkt_dev->lflow = value;
1486                 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1487                 return count;
1488         }
1489 
1490         if (!strcmp(name, "queue_map_min")) {
1491                 len = num_arg(&user_buffer[i], 5, &value);
1492                 if (len < 0)
1493                         return len;
1494 
1495                 i += len;
1496                 pkt_dev->queue_map_min = value;
1497                 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1498                 return count;
1499         }
1500 
1501         if (!strcmp(name, "queue_map_max")) {
1502                 len = num_arg(&user_buffer[i], 5, &value);
1503                 if (len < 0)
1504                         return len;
1505 
1506                 i += len;
1507                 pkt_dev->queue_map_max = value;
1508                 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1509                 return count;
1510         }
1511 
1512         if (!strcmp(name, "mpls")) {
1513                 unsigned n, cnt;
1514 
1515                 len = get_labels(&user_buffer[i], pkt_dev);
1516                 if (len < 0)
1517                         return len;
1518                 i += len;
1519                 cnt = sprintf(pg_result, "OK: mpls=");
1520                 for (n = 0; n < pkt_dev->nr_labels; n++)
1521                         cnt += sprintf(pg_result + cnt,
1522                                        "%08x%s", ntohl(pkt_dev->labels[n]),
1523                                        n == pkt_dev->nr_labels-1 ? "" : ",");
1524 
1525                 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1526                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1527                         pkt_dev->svlan_id = 0xffff;
1528 
1529                         if (debug)
1530                                 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1531                 }
1532                 return count;
1533         }
1534 
1535         if (!strcmp(name, "vlan_id")) {
1536                 len = num_arg(&user_buffer[i], 4, &value);
1537                 if (len < 0)
1538                         return len;
1539 
1540                 i += len;
1541                 if (value <= 4095) {
1542                         pkt_dev->vlan_id = value;  /* turn on VLAN */
1543 
1544                         if (debug)
1545                                 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1546 
1547                         if (debug && pkt_dev->nr_labels)
1548                                 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1549 
1550                         pkt_dev->nr_labels = 0;    /* turn off MPLS */
1551                         sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1552                 } else {
1553                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1554                         pkt_dev->svlan_id = 0xffff;
1555 
1556                         if (debug)
1557                                 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1558                 }
1559                 return count;
1560         }
1561 
1562         if (!strcmp(name, "vlan_p")) {
1563                 len = num_arg(&user_buffer[i], 1, &value);
1564                 if (len < 0)
1565                         return len;
1566 
1567                 i += len;
1568                 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1569                         pkt_dev->vlan_p = value;
1570                         sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1571                 } else {
1572                         sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1573                 }
1574                 return count;
1575         }
1576 
1577         if (!strcmp(name, "vlan_cfi")) {
1578                 len = num_arg(&user_buffer[i], 1, &value);
1579                 if (len < 0)
1580                         return len;
1581 
1582                 i += len;
1583                 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1584                         pkt_dev->vlan_cfi = value;
1585                         sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1586                 } else {
1587                         sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1588                 }
1589                 return count;
1590         }
1591 
1592         if (!strcmp(name, "svlan_id")) {
1593                 len = num_arg(&user_buffer[i], 4, &value);
1594                 if (len < 0)
1595                         return len;
1596 
1597                 i += len;
1598                 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1599                         pkt_dev->svlan_id = value;  /* turn on SVLAN */
1600 
1601                         if (debug)
1602                                 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1603 
1604                         if (debug && pkt_dev->nr_labels)
1605                                 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1606 
1607                         pkt_dev->nr_labels = 0;    /* turn off MPLS */
1608                         sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1609                 } else {
1610                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1611                         pkt_dev->svlan_id = 0xffff;
1612 
1613                         if (debug)
1614                                 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1615                 }
1616                 return count;
1617         }
1618 
1619         if (!strcmp(name, "svlan_p")) {
1620                 len = num_arg(&user_buffer[i], 1, &value);
1621                 if (len < 0)
1622                         return len;
1623 
1624                 i += len;
1625                 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1626                         pkt_dev->svlan_p = value;
1627                         sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1628                 } else {
1629                         sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1630                 }
1631                 return count;
1632         }
1633 
1634         if (!strcmp(name, "svlan_cfi")) {
1635                 len = num_arg(&user_buffer[i], 1, &value);
1636                 if (len < 0)
1637                         return len;
1638 
1639                 i += len;
1640                 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1641                         pkt_dev->svlan_cfi = value;
1642                         sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1643                 } else {
1644                         sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1645                 }
1646                 return count;
1647         }
1648 
1649         if (!strcmp(name, "tos")) {
1650                 __u32 tmp_value = 0;
1651                 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1652                 if (len < 0)
1653                         return len;
1654 
1655                 i += len;
1656                 if (len == 2) {
1657                         pkt_dev->tos = tmp_value;
1658                         sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1659                 } else {
1660                         sprintf(pg_result, "ERROR: tos must be 00-ff");
1661                 }
1662                 return count;
1663         }
1664 
1665         if (!strcmp(name, "traffic_class")) {
1666                 __u32 tmp_value = 0;
1667                 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1668                 if (len < 0)
1669                         return len;
1670 
1671                 i += len;
1672                 if (len == 2) {
1673                         pkt_dev->traffic_class = tmp_value;
1674                         sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1675                 } else {
1676                         sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1677                 }
1678                 return count;
1679         }
1680 
1681         if (!strcmp(name, "skb_priority")) {
1682                 len = num_arg(&user_buffer[i], 9, &value);
1683                 if (len < 0)
1684                         return len;
1685 
1686                 i += len;
1687                 pkt_dev->skb_priority = value;
1688                 sprintf(pg_result, "OK: skb_priority=%i",
1689                         pkt_dev->skb_priority);
1690                 return count;
1691         }
1692 
1693         sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1694         return -EINVAL;
1695 }
1696 
1697 static int pktgen_if_open(struct inode *inode, struct file *file)
1698 {
1699         return single_open(file, pktgen_if_show, PDE(inode)->data);
1700 }
1701 
1702 static const struct file_operations pktgen_if_fops = {
1703         .owner   = THIS_MODULE,
1704         .open    = pktgen_if_open,
1705         .read    = seq_read,
1706         .llseek  = seq_lseek,
1707         .write   = pktgen_if_write,
1708         .release = single_release,
1709 };
1710 
1711 static int pktgen_thread_show(struct seq_file *seq, void *v)
1712 {
1713         struct pktgen_thread *t = seq->private;
1714         const struct pktgen_dev *pkt_dev;
1715 
1716         BUG_ON(!t);
1717 
1718         seq_printf(seq, "Running: ");
1719 
1720         if_lock(t);
1721         list_for_each_entry(pkt_dev, &t->if_list, list)
1722                 if (pkt_dev->running)
1723                         seq_printf(seq, "%s ", pkt_dev->odevname);
1724 
1725         seq_printf(seq, "\nStopped: ");
1726 
1727         list_for_each_entry(pkt_dev, &t->if_list, list)
1728                 if (!pkt_dev->running)
1729                         seq_printf(seq, "%s ", pkt_dev->odevname);
1730 
1731         if (t->result[0])
1732                 seq_printf(seq, "\nResult: %s\n", t->result);
1733         else
1734                 seq_printf(seq, "\nResult: NA\n");
1735 
1736         if_unlock(t);
1737 
1738         return 0;
1739 }
1740 
1741 static ssize_t pktgen_thread_write(struct file *file,
1742                                    const char __user * user_buffer,
1743                                    size_t count, loff_t * offset)
1744 {
1745         struct seq_file *seq = file->private_data;
1746         struct pktgen_thread *t = seq->private;
1747         int i, max, len, ret;
1748         char name[40];
1749         char *pg_result;
1750 
1751         if (count < 1) {
1752                 //      sprintf(pg_result, "Wrong command format");
1753                 return -EINVAL;
1754         }
1755 
1756         max = count;
1757         len = count_trail_chars(user_buffer, max);
1758         if (len < 0)
1759                 return len;
1760 
1761         i = len;
1762 
1763         /* Read variable name */
1764 
1765         len = strn_len(&user_buffer[i], sizeof(name) - 1);
1766         if (len < 0)
1767                 return len;
1768 
1769         memset(name, 0, sizeof(name));
1770         if (copy_from_user(name, &user_buffer[i], len))
1771                 return -EFAULT;
1772         i += len;
1773 
1774         max = count - i;
1775         len = count_trail_chars(&user_buffer[i], max);
1776         if (len < 0)
1777                 return len;
1778 
1779         i += len;
1780 
1781         if (debug)
1782                 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1783                        name, (unsigned long)count);
1784 
1785         if (!t) {
1786                 pr_err("ERROR: No thread\n");
1787                 ret = -EINVAL;
1788                 goto out;
1789         }
1790 
1791         pg_result = &(t->result[0]);
1792 
1793         if (!strcmp(name, "add_device")) {
1794                 char f[32];
1795                 memset(f, 0, 32);
1796                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1797                 if (len < 0) {
1798                         ret = len;
1799                         goto out;
1800                 }
1801                 if (copy_from_user(f, &user_buffer[i], len))
1802                         return -EFAULT;
1803                 i += len;
1804                 mutex_lock(&pktgen_thread_lock);
1805                 ret = pktgen_add_device(t, f);
1806                 mutex_unlock(&pktgen_thread_lock);
1807                 if (!ret) {
1808                         ret = count;
1809                         sprintf(pg_result, "OK: add_device=%s", f);
1810                 } else
1811                         sprintf(pg_result, "ERROR: can not add device %s", f);
1812                 goto out;
1813         }
1814 
1815         if (!strcmp(name, "rem_device_all")) {
1816                 mutex_lock(&pktgen_thread_lock);
1817                 t->control |= T_REMDEVALL;
1818                 mutex_unlock(&pktgen_thread_lock);
1819                 schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1820                 ret = count;
1821                 sprintf(pg_result, "OK: rem_device_all");
1822                 goto out;
1823         }
1824 
1825         if (!strcmp(name, "max_before_softirq")) {
1826                 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1827                 ret = count;
1828                 goto out;
1829         }
1830 
1831         ret = -EINVAL;
1832 out:
1833         return ret;
1834 }
1835 
1836 static int pktgen_thread_open(struct inode *inode, struct file *file)
1837 {
1838         return single_open(file, pktgen_thread_show, PDE(inode)->data);
1839 }
1840 
1841 static const struct file_operations pktgen_thread_fops = {
1842         .owner   = THIS_MODULE,
1843         .open    = pktgen_thread_open,
1844         .read    = seq_read,
1845         .llseek  = seq_lseek,
1846         .write   = pktgen_thread_write,
1847         .release = single_release,
1848 };
1849 
1850 /* Think find or remove for NN */
1851 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1852 {
1853         struct pktgen_thread *t;
1854         struct pktgen_dev *pkt_dev = NULL;
1855         bool exact = (remove == FIND);
1856 
1857         list_for_each_entry(t, &pktgen_threads, th_list) {
1858                 pkt_dev = pktgen_find_dev(t, ifname, exact);
1859                 if (pkt_dev) {
1860                         if (remove) {
1861                                 if_lock(t);
1862                                 pkt_dev->removal_mark = 1;
1863                                 t->control |= T_REMDEV;
1864                                 if_unlock(t);
1865                         }
1866                         break;
1867                 }
1868         }
1869         return pkt_dev;
1870 }
1871 
1872 /*
1873  * mark a device for removal
1874  */
1875 static void pktgen_mark_device(const char *ifname)
1876 {
1877         struct pktgen_dev *pkt_dev = NULL;
1878         const int max_tries = 10, msec_per_try = 125;
1879         int i = 0;
1880 
1881         mutex_lock(&pktgen_thread_lock);
1882         pr_debug("%s: marking %s for removal\n", __func__, ifname);
1883 
1884         while (1) {
1885 
1886                 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1887                 if (pkt_dev == NULL)
1888                         break;  /* success */
1889 
1890                 mutex_unlock(&pktgen_thread_lock);
1891                 pr_debug("%s: waiting for %s to disappear....\n",
1892                          __func__, ifname);
1893                 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1894                 mutex_lock(&pktgen_thread_lock);
1895 
1896                 if (++i >= max_tries) {
1897                         pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1898                                __func__, msec_per_try * i, ifname);
1899                         break;
1900                 }
1901 
1902         }
1903 
1904         mutex_unlock(&pktgen_thread_lock);
1905 }
1906 
1907 static void pktgen_change_name(struct net_device *dev)
1908 {
1909         struct pktgen_thread *t;
1910 
1911         list_for_each_entry(t, &pktgen_threads, th_list) {
1912                 struct pktgen_dev *pkt_dev;
1913 
1914                 list_for_each_entry(pkt_dev, &t->if_list, list) {
1915                         if (pkt_dev->odev != dev)
1916                                 continue;
1917 
1918                         remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1919 
1920                         pkt_dev->entry = proc_create_data(dev->name, 0600,
1921                                                           pg_proc_dir,
1922                                                           &pktgen_if_fops,
1923                                                           pkt_dev);
1924                         if (!pkt_dev->entry)
1925                                 pr_err("can't move proc entry for '%s'\n",
1926                                        dev->name);
1927                         break;
1928                 }
1929         }
1930 }
1931 
1932 static int pktgen_device_event(struct notifier_block *unused,
1933                                unsigned long event, void *ptr)
1934 {
1935         struct net_device *dev = ptr;
1936 
1937         if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting)
1938                 return NOTIFY_DONE;
1939 
1940         /* It is OK that we do not hold the group lock right now,
1941          * as we run under the RTNL lock.
1942          */
1943 
1944         switch (event) {
1945         case NETDEV_CHANGENAME:
1946                 pktgen_change_name(dev);
1947                 break;
1948 
1949         case NETDEV_UNREGISTER:
1950                 pktgen_mark_device(dev->name);
1951                 break;
1952         }
1953 
1954         return NOTIFY_DONE;
1955 }
1956 
1957 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1958                                                  const char *ifname)
1959 {
1960         char b[IFNAMSIZ+5];
1961         int i;
1962 
1963         for (i = 0; ifname[i] != '@'; i++) {
1964                 if (i == IFNAMSIZ)
1965                         break;
1966 
1967                 b[i] = ifname[i];
1968         }
1969         b[i] = 0;
1970 
1971         return dev_get_by_name(&init_net, b);
1972 }
1973 
1974 
1975 /* Associate pktgen_dev with a device. */
1976 
1977 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1978 {
1979         struct net_device *odev;
1980         int err;
1981 
1982         /* Clean old setups */
1983         if (pkt_dev->odev) {
1984                 dev_put(pkt_dev->odev);
1985                 pkt_dev->odev = NULL;
1986         }
1987 
1988         odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1989         if (!odev) {
1990                 pr_err("no such netdevice: \"%s\"\n", ifname);
1991                 return -ENODEV;
1992         }
1993 
1994         if (odev->type != ARPHRD_ETHER) {
1995                 pr_err("not an ethernet device: \"%s\"\n", ifname);
1996                 err = -EINVAL;
1997         } else if (!netif_running(odev)) {
1998                 pr_err("device is down: \"%s\"\n", ifname);
1999                 err = -ENETDOWN;
2000         } else {
2001                 pkt_dev->odev = odev;
2002                 return 0;
2003         }
2004 
2005         dev_put(odev);
2006         return err;
2007 }
2008 
2009 /* Read pkt_dev from the interface and set up internal pktgen_dev
2010  * structure to have the right information to create/send packets
2011  */
2012 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2013 {
2014         int ntxq;
2015 
2016         if (!pkt_dev->odev) {
2017                 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2018                 sprintf(pkt_dev->result,
2019                         "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2020                 return;
2021         }
2022 
2023         /* make sure that we don't pick a non-existing transmit queue */
2024         ntxq = pkt_dev->odev->real_num_tx_queues;
2025 
2026         if (ntxq <= pkt_dev->queue_map_min) {
2027                 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2028                            pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2029                            pkt_dev->odevname);
2030                 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2031         }
2032         if (pkt_dev->queue_map_max >= ntxq) {
2033                 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2034                            pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2035                            pkt_dev->odevname);
2036                 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2037         }
2038 
2039         /* Default to the interface's mac if not explicitly set. */
2040 
2041         if (is_zero_ether_addr(pkt_dev->src_mac))
2042                 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2043 
2044         /* Set up Dest MAC */
2045         memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2046 
2047         /* Set up pkt size */
2048         pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2049 
2050         if (pkt_dev->flags & F_IPV6) {
2051                 /*
2052                  * Skip this automatic address setting until locks or functions
2053                  * gets exported
2054                  */
2055 
2056 #ifdef NOTNOW
2057                 int i, set = 0, err = 1;
2058                 struct inet6_dev *idev;
2059 
2060                 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2061                         if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2062                                 set = 1;
2063                                 break;
2064                         }
2065 
2066                 if (!set) {
2067 
2068                         /*
2069                          * Use linklevel address if unconfigured.
2070                          *
2071                          * use ipv6_get_lladdr if/when it's get exported
2072                          */
2073 
2074                         rcu_read_lock();
2075                         idev = __in6_dev_get(pkt_dev->odev);
2076                         if (idev) {
2077                                 struct inet6_ifaddr *ifp;
2078 
2079                                 read_lock_bh(&idev->lock);
2080                                 for (ifp = idev->addr_list; ifp;
2081                                      ifp = ifp->if_next) {
2082                                         if (ifp->scope == IFA_LINK &&
2083                                             !(ifp->flags & IFA_F_TENTATIVE)) {
2084                                                 pkt_dev->cur_in6_saddr = ifp->addr;
2085                                                 err = 0;
2086                                                 break;
2087                                         }
2088                                 }
2089                                 read_unlock_bh(&idev->lock);
2090                         }
2091                         rcu_read_unlock();
2092                         if (err)
2093                                 pr_err("ERROR: IPv6 link address not available\n");
2094                 }
2095 #endif
2096         } else {
2097                 pkt_dev->saddr_min = 0;
2098                 pkt_dev->saddr_max = 0;
2099                 if (strlen(pkt_dev->src_min) == 0) {
2100 
2101                         struct in_device *in_dev;
2102 
2103                         rcu_read_lock();
2104                         in_dev = __in_dev_get_rcu(pkt_dev->odev);
2105                         if (in_dev) {
2106                                 if (in_dev->ifa_list) {
2107                                         pkt_dev->saddr_min =
2108                                             in_dev->ifa_list->ifa_address;
2109                                         pkt_dev->saddr_max = pkt_dev->saddr_min;
2110                                 }
2111                         }
2112                         rcu_read_unlock();
2113                 } else {
2114                         pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2115                         pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2116                 }
2117 
2118                 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2119                 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2120         }
2121         /* Initialize current values. */
2122         pkt_dev->cur_dst_mac_offset = 0;
2123         pkt_dev->cur_src_mac_offset = 0;
2124         pkt_dev->cur_saddr = pkt_dev->saddr_min;
2125         pkt_dev->cur_daddr = pkt_dev->daddr_min;
2126         pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2127         pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2128         pkt_dev->nflows = 0;
2129 }
2130 
2131 
2132 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2133 {
2134         ktime_t start_time, end_time;
2135         s64 remaining;
2136         struct hrtimer_sleeper t;
2137 
2138         hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2139         hrtimer_set_expires(&t.timer, spin_until);
2140 
2141         remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2142         if (remaining <= 0) {
2143                 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2144                 return;
2145         }
2146 
2147         start_time = ktime_now();
2148         if (remaining < 100000) {
2149                 /* for small delays (<100us), just loop until limit is reached */
2150                 do {
2151                         end_time = ktime_now();
2152                 } while (ktime_lt(end_time, spin_until));
2153         } else {
2154                 /* see do_nanosleep */
2155                 hrtimer_init_sleeper(&t, current);
2156                 do {
2157                         set_current_state(TASK_INTERRUPTIBLE);
2158                         hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2159                         if (!hrtimer_active(&t.timer))
2160                                 t.task = NULL;
2161 
2162                         if (likely(t.task))
2163                                 schedule();
2164 
2165                         hrtimer_cancel(&t.timer);
2166                 } while (t.task && pkt_dev->running && !signal_pending(current));
2167                 __set_current_state(TASK_RUNNING);
2168                 end_time = ktime_now();
2169         }
2170 
2171         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2172         pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2173 }
2174 
2175 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2176 {
2177         pkt_dev->pkt_overhead = 0;
2178         pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2179         pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2180         pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2181 }
2182 
2183 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2184 {
2185         return !!(pkt_dev->flows[flow].flags & F_INIT);
2186 }
2187 
2188 static inline int f_pick(struct pktgen_dev *pkt_dev)
2189 {
2190         int flow = pkt_dev->curfl;
2191 
2192         if (pkt_dev->flags & F_FLOW_SEQ) {
2193                 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2194                         /* reset time */
2195                         pkt_dev->flows[flow].count = 0;
2196                         pkt_dev->flows[flow].flags = 0;
2197                         pkt_dev->curfl += 1;
2198                         if (pkt_dev->curfl >= pkt_dev->cflows)
2199                                 pkt_dev->curfl = 0; /*reset */
2200                 }
2201         } else {
2202                 flow = random32() % pkt_dev->cflows;
2203                 pkt_dev->curfl = flow;
2204 
2205                 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2206                         pkt_dev->flows[flow].count = 0;
2207                         pkt_dev->flows[flow].flags = 0;
2208                 }
2209         }
2210 
2211         return pkt_dev->curfl;
2212 }
2213 
2214 
2215 #ifdef CONFIG_XFRM
2216 /* If there was already an IPSEC SA, we keep it as is, else
2217  * we go look for it ...
2218 */
2219 #define DUMMY_MARK 0
2220 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2221 {
2222         struct xfrm_state *x = pkt_dev->flows[flow].x;
2223         if (!x) {
2224                 /*slow path: we dont already have xfrm_state*/
2225                 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2226                                         (xfrm_address_t *)&pkt_dev->cur_daddr,
2227                                         (xfrm_address_t *)&pkt_dev->cur_saddr,
2228                                         AF_INET,
2229                                         pkt_dev->ipsmode,
2230                                         pkt_dev->ipsproto, 0);
2231                 if (x) {
2232                         pkt_dev->flows[flow].x = x;
2233                         set_pkt_overhead(pkt_dev);
2234                         pkt_dev->pkt_overhead += x->props.header_len;
2235                 }
2236 
2237         }
2238 }
2239 #endif
2240 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2241 {
2242 
2243         if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2244                 pkt_dev->cur_queue_map = smp_processor_id();
2245 
2246         else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2247                 __u16 t;
2248                 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2249                         t = random32() %
2250                                 (pkt_dev->queue_map_max -
2251                                  pkt_dev->queue_map_min + 1)
2252                                 + pkt_dev->queue_map_min;
2253                 } else {
2254                         t = pkt_dev->cur_queue_map + 1;
2255                         if (t > pkt_dev->queue_map_max)
2256                                 t = pkt_dev->queue_map_min;
2257                 }
2258                 pkt_dev->cur_queue_map = t;
2259         }
2260         pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2261 }
2262 
2263 /* Increment/randomize headers according to flags and current values
2264  * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2265  */
2266 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2267 {
2268         __u32 imn;
2269         __u32 imx;
2270         int flow = 0;
2271 
2272         if (pkt_dev->cflows)
2273                 flow = f_pick(pkt_dev);
2274 
2275         /*  Deal with source MAC */
2276         if (pkt_dev->src_mac_count > 1) {
2277                 __u32 mc;
2278                 __u32 tmp;
2279 
2280                 if (pkt_dev->flags & F_MACSRC_RND)
2281                         mc = random32() % pkt_dev->src_mac_count;
2282                 else {
2283                         mc = pkt_dev->cur_src_mac_offset++;
2284                         if (pkt_dev->cur_src_mac_offset >=
2285                             pkt_dev->src_mac_count)
2286                                 pkt_dev->cur_src_mac_offset = 0;
2287                 }
2288 
2289                 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2290                 pkt_dev->hh[11] = tmp;
2291                 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2292                 pkt_dev->hh[10] = tmp;
2293                 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2294                 pkt_dev->hh[9] = tmp;
2295                 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2296                 pkt_dev->hh[8] = tmp;
2297                 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2298                 pkt_dev->hh[7] = tmp;
2299         }
2300 
2301         /*  Deal with Destination MAC */
2302         if (pkt_dev->dst_mac_count > 1) {
2303                 __u32 mc;
2304                 __u32 tmp;
2305 
2306                 if (pkt_dev->flags & F_MACDST_RND)
2307                         mc = random32() % pkt_dev->dst_mac_count;
2308 
2309                 else {
2310                         mc = pkt_dev->cur_dst_mac_offset++;
2311                         if (pkt_dev->cur_dst_mac_offset >=
2312                             pkt_dev->dst_mac_count) {
2313                                 pkt_dev->cur_dst_mac_offset = 0;
2314                         }
2315                 }
2316 
2317                 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2318                 pkt_dev->hh[5] = tmp;
2319                 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2320                 pkt_dev->hh[4] = tmp;
2321                 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2322                 pkt_dev->hh[3] = tmp;
2323                 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2324                 pkt_dev->hh[2] = tmp;
2325                 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2326                 pkt_dev->hh[1] = tmp;
2327         }
2328 
2329         if (pkt_dev->flags & F_MPLS_RND) {
2330                 unsigned i;
2331                 for (i = 0; i < pkt_dev->nr_labels; i++)
2332                         if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2333                                 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2334                                              ((__force __be32)random32() &
2335                                                       htonl(0x000fffff));
2336         }
2337 
2338         if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2339                 pkt_dev->vlan_id = random32() & (4096-1);
2340         }
2341 
2342         if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2343                 pkt_dev->svlan_id = random32() & (4096 - 1);
2344         }
2345 
2346         if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2347                 if (pkt_dev->flags & F_UDPSRC_RND)
2348                         pkt_dev->cur_udp_src = random32() %
2349                                 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2350                                 + pkt_dev->udp_src_min;
2351 
2352                 else {
2353                         pkt_dev->cur_udp_src++;
2354                         if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2355                                 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2356                 }
2357         }
2358 
2359         if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2360                 if (pkt_dev->flags & F_UDPDST_RND) {
2361                         pkt_dev->cur_udp_dst = random32() %
2362                                 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2363                                 + pkt_dev->udp_dst_min;
2364                 } else {
2365                         pkt_dev->cur_udp_dst++;
2366                         if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2367                                 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2368                 }
2369         }
2370 
2371         if (!(pkt_dev->flags & F_IPV6)) {
2372 
2373                 imn = ntohl(pkt_dev->saddr_min);
2374                 imx = ntohl(pkt_dev->saddr_max);
2375                 if (imn < imx) {
2376                         __u32 t;
2377                         if (pkt_dev->flags & F_IPSRC_RND)
2378                                 t = random32() % (imx - imn) + imn;
2379                         else {
2380                                 t = ntohl(pkt_dev->cur_saddr);
2381                                 t++;
2382                                 if (t > imx)
2383                                         t = imn;
2384 
2385                         }
2386                         pkt_dev->cur_saddr = htonl(t);
2387                 }
2388 
2389                 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2390                         pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2391                 } else {
2392                         imn = ntohl(pkt_dev->daddr_min);
2393                         imx = ntohl(pkt_dev->daddr_max);
2394                         if (imn < imx) {
2395                                 __u32 t;
2396                                 __be32 s;
2397                                 if (pkt_dev->flags & F_IPDST_RND) {
2398 
2399                                         t = random32() % (imx - imn) + imn;
2400                                         s = htonl(t);
2401 
2402                                         while (ipv4_is_loopback(s) ||
2403                                                ipv4_is_multicast(s) ||
2404                                                ipv4_is_lbcast(s) ||
2405                                                ipv4_is_zeronet(s) ||
2406                                                ipv4_is_local_multicast(s)) {
2407                                                 t = random32() % (imx - imn) + imn;
2408                                                 s = htonl(t);
2409                                         }
2410                                         pkt_dev->cur_daddr = s;
2411                                 } else {
2412                                         t = ntohl(pkt_dev->cur_daddr);
2413                                         t++;
2414                                         if (t > imx) {
2415                                                 t = imn;
2416                                         }
2417                                         pkt_dev->cur_daddr = htonl(t);
2418                                 }
2419                         }
2420                         if (pkt_dev->cflows) {
2421                                 pkt_dev->flows[flow].flags |= F_INIT;
2422                                 pkt_dev->flows[flow].cur_daddr =
2423                                     pkt_dev->cur_daddr;
2424 #ifdef CONFIG_XFRM
2425                                 if (pkt_dev->flags & F_IPSEC_ON)
2426                                         get_ipsec_sa(pkt_dev, flow);
2427 #endif
2428                                 pkt_dev->nflows++;
2429                         }
2430                 }
2431         } else {                /* IPV6 * */
2432 
2433                 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2434                     pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2435                     pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2436                     pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2437                 else {
2438                         int i;
2439 
2440                         /* Only random destinations yet */
2441 
2442                         for (i = 0; i < 4; i++) {
2443                                 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2444                                     (((__force __be32)random32() |
2445                                       pkt_dev->min_in6_daddr.s6_addr32[i]) &
2446                                      pkt_dev->max_in6_daddr.s6_addr32[i]);
2447                         }
2448                 }
2449         }
2450 
2451         if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2452                 __u32 t;
2453                 if (pkt_dev->flags & F_TXSIZE_RND) {
2454                         t = random32() %
2455                                 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2456                                 + pkt_dev->min_pkt_size;
2457                 } else {
2458                         t = pkt_dev->cur_pkt_size + 1;
2459                         if (t > pkt_dev->max_pkt_size)
2460                                 t = pkt_dev->min_pkt_size;
2461                 }
2462                 pkt_dev->cur_pkt_size = t;
2463         }
2464 
2465         set_cur_queue_map(pkt_dev);
2466 
2467         pkt_dev->flows[flow].count++;
2468 }
2469 
2470 
2471 #ifdef CONFIG_XFRM
2472 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2473 {
2474         struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2475         int err = 0;
2476 
2477         if (!x)
2478                 return 0;
2479         /* XXX: we dont support tunnel mode for now until
2480          * we resolve the dst issue */
2481         if (x->props.mode != XFRM_MODE_TRANSPORT)
2482                 return 0;
2483 
2484         spin_lock(&x->lock);
2485 
2486         err = x->outer_mode->output(x, skb);
2487         if (err)
2488                 goto error;
2489         err = x->type->output(x, skb);
2490         if (err)
2491                 goto error;
2492 
2493         x->curlft.bytes += skb->len;
2494         x->curlft.packets++;
2495 error:
2496         spin_unlock(&x->lock);
2497         return err;
2498 }
2499 
2500 static void free_SAs(struct pktgen_dev *pkt_dev)
2501 {
2502         if (pkt_dev->cflows) {
2503                 /* let go of the SAs if we have them */
2504                 int i;
2505                 for (i = 0; i < pkt_dev->cflows; i++) {
2506                         struct xfrm_state *x = pkt_dev->flows[i].x;
2507                         if (x) {
2508                                 xfrm_state_put(x);
2509                                 pkt_dev->flows[i].x = NULL;
2510                         }
2511                 }
2512         }
2513 }
2514 
2515 static int process_ipsec(struct pktgen_dev *pkt_dev,
2516                               struct sk_buff *skb, __be16 protocol)
2517 {
2518         if (pkt_dev->flags & F_IPSEC_ON) {
2519                 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2520                 int nhead = 0;
2521                 if (x) {
2522                         int ret;
2523                         __u8 *eth;
2524                         struct iphdr *iph;
2525 
2526                         nhead = x->props.header_len - skb_headroom(skb);
2527                         if (nhead > 0) {
2528                                 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2529                                 if (ret < 0) {
2530                                         pr_err("Error expanding ipsec packet %d\n",
2531                                                ret);
2532                                         goto err;
2533                                 }
2534                         }
2535 
2536                         /* ipsec is not expecting ll header */
2537                         skb_pull(skb, ETH_HLEN);
2538                         ret = pktgen_output_ipsec(skb, pkt_dev);
2539                         if (ret) {
2540                                 pr_err("Error creating ipsec packet %d\n", ret);
2541                                 goto err;
2542                         }
2543                         /* restore ll */
2544                         eth = (__u8 *) skb_push(skb, ETH_HLEN);
2545                         memcpy(eth, pkt_dev->hh, 12);
2546                         *(u16 *) &eth[12] = protocol;
2547 
2548                         /* Update IPv4 header len as well as checksum value */
2549                         iph = ip_hdr(skb);
2550                         iph->tot_len = htons(skb->len - ETH_HLEN);
2551                         ip_send_check(iph);
2552                 }
2553         }
2554         return 1;
2555 err:
2556         kfree_skb(skb);
2557         return 0;
2558 }
2559 #endif
2560 
2561 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2562 {
2563         unsigned i;
2564         for (i = 0; i < pkt_dev->nr_labels; i++)
2565                 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2566 
2567         mpls--;
2568         *mpls |= MPLS_STACK_BOTTOM;
2569 }
2570 
2571 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2572                                unsigned int prio)
2573 {
2574         return htons(id | (cfi << 12) | (prio << 13));
2575 }
2576 
2577 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2578                                 int datalen)
2579 {
2580         struct timeval timestamp;
2581         struct pktgen_hdr *pgh;
2582 
2583         pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2584         datalen -= sizeof(*pgh);
2585 
2586         if (pkt_dev->nfrags <= 0) {
2587                 memset(skb_put(skb, datalen), 0, datalen);
2588         } else {
2589                 int frags = pkt_dev->nfrags;
2590                 int i, len;
2591                 int frag_len;
2592 
2593 
2594                 if (frags > MAX_SKB_FRAGS)
2595                         frags = MAX_SKB_FRAGS;
2596                 len = datalen - frags * PAGE_SIZE;
2597                 if (len > 0) {
2598                         memset(skb_put(skb, len), 0, len);
2599                         datalen = frags * PAGE_SIZE;
2600                 }
2601 
2602                 i = 0;
2603                 frag_len = (datalen/frags) < PAGE_SIZE ?
2604                            (datalen/frags) : PAGE_SIZE;
2605                 while (datalen > 0) {
2606                         if (unlikely(!pkt_dev->page)) {
2607                                 int node = numa_node_id();
2608 
2609                                 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2610                                         node = pkt_dev->node;
2611                                 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2612                                 if (!pkt_dev->page)
2613                                         break;
2614                         }
2615                         get_page(pkt_dev->page);
2616                         skb_frag_set_page(skb, i, pkt_dev->page);
2617                         skb_shinfo(skb)->frags[i].page_offset = 0;
2618                         /*last fragment, fill rest of data*/
2619                         if (i == (frags - 1))
2620                                 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2621                                     (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2622                         else
2623                                 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2624                         datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2625                         skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2626                         skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2627                         i++;
2628                         skb_shinfo(skb)->nr_frags = i;
2629                 }
2630         }
2631 
2632         /* Stamp the time, and sequence number,
2633          * convert them to network byte order
2634          */
2635         pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2636         pgh->seq_num = htonl(pkt_dev->seq_num);
2637 
2638         do_gettimeofday(&timestamp);
2639         pgh->tv_sec = htonl(timestamp.tv_sec);
2640         pgh->tv_usec = htonl(timestamp.tv_usec);
2641 }
2642 
2643 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2644                                         struct pktgen_dev *pkt_dev)
2645 {
2646         struct sk_buff *skb = NULL;
2647         __u8 *eth;
2648         struct udphdr *udph;
2649         int datalen, iplen;
2650         struct iphdr *iph;
2651         __be16 protocol = htons(ETH_P_IP);
2652         __be32 *mpls;
2653         __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2654         __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2655         __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2656         __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2657         u16 queue_map;
2658 
2659         if (pkt_dev->nr_labels)
2660                 protocol = htons(ETH_P_MPLS_UC);
2661 
2662         if (pkt_dev->vlan_id != 0xffff)
2663                 protocol = htons(ETH_P_8021Q);
2664 
2665         /* Update any of the values, used when we're incrementing various
2666          * fields.
2667          */
2668         mod_cur_headers(pkt_dev);
2669         queue_map = pkt_dev->cur_queue_map;
2670 
2671         datalen = (odev->hard_header_len + 16) & ~0xf;
2672 
2673         if (pkt_dev->flags & F_NODE) {
2674                 int node;
2675 
2676                 if (pkt_dev->node >= 0)
2677                         node = pkt_dev->node;
2678                 else
2679                         node =  numa_node_id();
2680 
2681                 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2682                                   + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2683                 if (likely(skb)) {
2684                         skb_reserve(skb, NET_SKB_PAD);
2685                         skb->dev = odev;
2686                 }
2687         }
2688         else
2689           skb = __netdev_alloc_skb(odev,
2690                                    pkt_dev->cur_pkt_size + 64
2691                                    + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2692 
2693         if (!skb) {
2694                 sprintf(pkt_dev->result, "No memory");
2695                 return NULL;
2696         }
2697         prefetchw(skb->data);
2698 
2699         skb_reserve(skb, datalen);
2700 
2701         /*  Reserve for ethernet and IP header  */
2702         eth = (__u8 *) skb_push(skb, 14);
2703         mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2704         if (pkt_dev->nr_labels)
2705                 mpls_push(mpls, pkt_dev);
2706 
2707         if (pkt_dev->vlan_id != 0xffff) {
2708                 if (pkt_dev->svlan_id != 0xffff) {
2709                         svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2710                         *svlan_tci = build_tci(pkt_dev->svlan_id,
2711                                                pkt_dev->svlan_cfi,
2712                                                pkt_dev->svlan_p);
2713                         svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2714                         *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2715                 }
2716                 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2717                 *vlan_tci = build_tci(pkt_dev->vlan_id,
2718                                       pkt_dev->vlan_cfi,
2719                                       pkt_dev->vlan_p);
2720                 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2721                 *vlan_encapsulated_proto = htons(ETH_P_IP);
2722         }
2723 
2724         skb->network_header = skb->tail;
2725         skb->transport_header = skb->network_header + sizeof(struct iphdr);
2726         skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2727         skb_set_queue_mapping(skb, queue_map);
2728         skb->priority = pkt_dev->skb_priority;
2729 
2730         iph = ip_hdr(skb);
2731         udph = udp_hdr(skb);
2732 
2733         memcpy(eth, pkt_dev->hh, 12);
2734         *(__be16 *) & eth[12] = protocol;
2735 
2736         /* Eth + IPh + UDPh + mpls */
2737         datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2738                   pkt_dev->pkt_overhead;
2739         if (datalen < sizeof(struct pktgen_hdr))
2740                 datalen = sizeof(struct pktgen_hdr);
2741 
2742         udph->source = htons(pkt_dev->cur_udp_src);
2743         udph->dest = htons(pkt_dev->cur_udp_dst);
2744         udph->len = htons(datalen + 8); /* DATA + udphdr */
2745         udph->check = 0;        /* No checksum */
2746 
2747         iph->ihl = 5;
2748         iph->version = 4;
2749         iph->ttl = 32;
2750         iph->tos = pkt_dev->tos;
2751         iph->protocol = IPPROTO_UDP;    /* UDP */
2752         iph->saddr = pkt_dev->cur_saddr;
2753         iph->daddr = pkt_dev->cur_daddr;
2754         iph->id = htons(pkt_dev->ip_id);
2755         pkt_dev->ip_id++;
2756         iph->frag_off = 0;
2757         iplen = 20 + 8 + datalen;
2758         iph->tot_len = htons(iplen);
2759         iph->check = 0;
2760         iph->check = ip_fast_csum((void *)iph, iph->ihl);
2761         skb->protocol = protocol;
2762         skb->mac_header = (skb->network_header - ETH_HLEN -
2763                            pkt_dev->pkt_overhead);
2764         skb->dev = odev;
2765         skb->pkt_type = PACKET_HOST;
2766         pktgen_finalize_skb(pkt_dev, skb, datalen);
2767 
2768 #ifdef CONFIG_XFRM
2769         if (!process_ipsec(pkt_dev, skb, protocol))
2770                 return NULL;
2771 #endif
2772 
2773         return skb;
2774 }
2775 
2776 /*
2777  * scan_ip6, fmt_ip taken from dietlibc-0.21
2778  * Author Felix von Leitner <felix-dietlibc@fefe.de>
2779  *
2780  * Slightly modified for kernel.
2781  * Should be candidate for net/ipv4/utils.c
2782  * --ro
2783  */
2784 
2785 static unsigned int scan_ip6(const char *s, char ip[16])
2786 {
2787         unsigned int i;
2788         unsigned int len = 0;
2789         unsigned long u;
2790         char suffix[16];
2791         unsigned int prefixlen = 0;
2792         unsigned int suffixlen = 0;
2793         __be32 tmp;
2794         char *pos;
2795 
2796         for (i = 0; i < 16; i++)
2797                 ip[i] = 0;
2798 
2799         for (;;) {
2800                 if (*s == ':') {
2801                         len++;
2802                         if (s[1] == ':') {      /* Found "::", skip to part 2 */
2803                                 s += 2;
2804                                 len++;
2805                                 break;
2806                         }
2807                         s++;
2808                 }
2809 
2810                 u = simple_strtoul(s, &pos, 16);
2811                 i = pos - s;
2812                 if (!i)
2813                         return 0;
2814                 if (prefixlen == 12 && s[i] == '.') {
2815 
2816                         /* the last 4 bytes may be written as IPv4 address */
2817 
2818                         tmp = in_aton(s);
2819                         memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2820                         return i + len;
2821                 }
2822                 ip[prefixlen++] = (u >> 8);
2823                 ip[prefixlen++] = (u & 255);
2824                 s += i;
2825                 len += i;
2826                 if (prefixlen == 16)
2827                         return len;
2828         }
2829 
2830 /* part 2, after "::" */
2831         for (;;) {
2832                 if (*s == ':') {
2833                         if (suffixlen == 0)
2834                                 break;
2835                         s++;
2836                         len++;
2837                 } else if (suffixlen != 0)
2838                         break;
2839 
2840                 u = simple_strtol(s, &pos, 16);
2841                 i = pos - s;
2842                 if (!i) {
2843                         if (*s)
2844                                 len--;
2845                         break;
2846                 }
2847                 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2848                         tmp = in_aton(s);
2849                         memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2850                                sizeof(tmp));
2851                         suffixlen += 4;
2852                         len += strlen(s);
2853                         break;
2854                 }
2855                 suffix[suffixlen++] = (u >> 8);
2856                 suffix[suffixlen++] = (u & 255);
2857                 s += i;
2858                 len += i;
2859                 if (prefixlen + suffixlen == 16)
2860                         break;
2861         }
2862         for (i = 0; i < suffixlen; i++)
2863                 ip[16 - suffixlen + i] = suffix[i];
2864         return len;
2865 }
2866 
2867 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2868                                         struct pktgen_dev *pkt_dev)
2869 {
2870         struct sk_buff *skb = NULL;
2871         __u8 *eth;
2872         struct udphdr *udph;
2873         int datalen;
2874         struct ipv6hdr *iph;
2875         __be16 protocol = htons(ETH_P_IPV6);
2876         __be32 *mpls;
2877         __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2878         __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2879         __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2880         __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2881         u16 queue_map;
2882 
2883         if (pkt_dev->nr_labels)
2884                 protocol = htons(ETH_P_MPLS_UC);
2885 
2886         if (pkt_dev->vlan_id != 0xffff)
2887                 protocol = htons(ETH_P_8021Q);
2888 
2889         /* Update any of the values, used when we're incrementing various
2890          * fields.
2891          */
2892         mod_cur_headers(pkt_dev);
2893         queue_map = pkt_dev->cur_queue_map;
2894 
2895         skb = __netdev_alloc_skb(odev,
2896                                  pkt_dev->cur_pkt_size + 64
2897                                  + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2898         if (!skb) {
2899                 sprintf(pkt_dev->result, "No memory");
2900                 return NULL;
2901         }
2902         prefetchw(skb->data);
2903 
2904         skb_reserve(skb, 16);
2905 
2906         /*  Reserve for ethernet and IP header  */
2907         eth = (__u8 *) skb_push(skb, 14);
2908         mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2909         if (pkt_dev->nr_labels)
2910                 mpls_push(mpls, pkt_dev);
2911 
2912         if (pkt_dev->vlan_id != 0xffff) {
2913                 if (pkt_dev->svlan_id != 0xffff) {
2914                         svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2915                         *svlan_tci = build_tci(pkt_dev->svlan_id,
2916                                                pkt_dev->svlan_cfi,
2917                                                pkt_dev->svlan_p);
2918                         svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2919                         *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2920                 }
2921                 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2922                 *vlan_tci = build_tci(pkt_dev->vlan_id,
2923                                       pkt_dev->vlan_cfi,
2924                                       pkt_dev->vlan_p);
2925                 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2926                 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2927         }
2928 
2929         skb->network_header = skb->tail;
2930         skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2931         skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2932         skb_set_queue_mapping(skb, queue_map);
2933         skb->priority = pkt_dev->skb_priority;
2934         iph = ipv6_hdr(skb);
2935         udph = udp_hdr(skb);
2936 
2937         memcpy(eth, pkt_dev->hh, 12);
2938         *(__be16 *) &eth[12] = protocol;
2939 
2940         /* Eth + IPh + UDPh + mpls */
2941         datalen = pkt_dev->cur_pkt_size - 14 -
2942                   sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2943                   pkt_dev->pkt_overhead;
2944 
2945         if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2946                 datalen = sizeof(struct pktgen_hdr);
2947                 if (net_ratelimit())
2948                         pr_info("increased datalen to %d\n", datalen);
2949         }
2950 
2951         udph->source = htons(pkt_dev->cur_udp_src);
2952         udph->dest = htons(pkt_dev->cur_udp_dst);
2953         udph->len = htons(datalen + sizeof(struct udphdr));
2954         udph->check = 0;        /* No checksum */
2955 
2956         *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
2957 
2958         if (pkt_dev->traffic_class) {
2959                 /* Version + traffic class + flow (0) */
2960                 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2961         }
2962 
2963         iph->hop_limit = 32;
2964 
2965         iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2966         iph->nexthdr = IPPROTO_UDP;
2967 
2968         iph->daddr = pkt_dev->cur_in6_daddr;
2969         iph->saddr = pkt_dev->cur_in6_saddr;
2970 
2971         skb->mac_header = (skb->network_header - ETH_HLEN -
2972                            pkt_dev->pkt_overhead);
2973         skb->protocol = protocol;
2974         skb->dev = odev;
2975         skb->pkt_type = PACKET_HOST;
2976 
2977         pktgen_finalize_skb(pkt_dev, skb, datalen);
2978 
2979         return skb;
2980 }
2981 
2982 static struct sk_buff *fill_packet(struct net_device *odev,
2983                                    struct pktgen_dev *pkt_dev)
2984 {
2985         if (pkt_dev->flags & F_IPV6)
2986                 return fill_packet_ipv6(odev, pkt_dev);
2987         else
2988                 return fill_packet_ipv4(odev, pkt_dev);
2989 }
2990 
2991 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2992 {
2993         pkt_dev->seq_num = 1;
2994         pkt_dev->idle_acc = 0;
2995         pkt_dev->sofar = 0;
2996         pkt_dev->tx_bytes = 0;
2997         pkt_dev->errors = 0;
2998 }
2999 
3000 /* Set up structure for sending pkts, clear counters */
3001 
3002 static void pktgen_run(struct pktgen_thread *t)
3003 {
3004         struct pktgen_dev *pkt_dev;
3005         int started = 0;
3006 
3007         func_enter();
3008 
3009         if_lock(t);
3010         list_for_each_entry(pkt_dev, &t->if_list, list) {
3011 
3012                 /*
3013                  * setup odev and create initial packet.
3014                  */
3015                 pktgen_setup_inject(pkt_dev);
3016 
3017                 if (pkt_dev->odev) {
3018                         pktgen_clear_counters(pkt_dev);
3019                         pkt_dev->running = 1;   /* Cranke yeself! */
3020                         pkt_dev->skb = NULL;
3021                         pkt_dev->started_at =
3022                                 pkt_dev->next_tx = ktime_now();
3023 
3024                         set_pkt_overhead(pkt_dev);
3025 
3026                         strcpy(pkt_dev->result, "Starting");
3027                         started++;
3028                 } else
3029                         strcpy(pkt_dev->result, "Error starting");
3030         }
3031         if_unlock(t);
3032         if (started)
3033                 t->control &= ~(T_STOP);
3034 }
3035 
3036 static void pktgen_stop_all_threads_ifs(void)
3037 {
3038         struct pktgen_thread *t;
3039 
3040         func_enter();
3041 
3042         mutex_lock(&pktgen_thread_lock);
3043 
3044         list_for_each_entry(t, &pktgen_threads, th_list)
3045                 t->control |= T_STOP;
3046 
3047         mutex_unlock(&pktgen_thread_lock);
3048 }
3049 
3050 static int thread_is_running(const struct pktgen_thread *t)
3051 {
3052         const struct pktgen_dev *pkt_dev;
3053 
3054         list_for_each_entry(pkt_dev, &t->if_list, list)
3055                 if (pkt_dev->running)
3056                         return 1;
3057         return 0;
3058 }
3059 
3060 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3061 {
3062         if_lock(t);
3063 
3064         while (thread_is_running(t)) {
3065 
3066                 if_unlock(t);
3067 
3068                 msleep_interruptible(100);
3069 
3070                 if (signal_pending(current))
3071                         goto signal;
3072                 if_lock(t);
3073         }
3074         if_unlock(t);
3075         return 1;
3076 signal:
3077         return 0;
3078 }
3079 
3080 static int pktgen_wait_all_threads_run(void)
3081 {
3082         struct pktgen_thread *t;
3083         int sig = 1;
3084 
3085         mutex_lock(&pktgen_thread_lock);
3086 
3087         list_for_each_entry(t, &pktgen_threads, th_list) {
3088                 sig = pktgen_wait_thread_run(t);
3089                 if (sig == 0)
3090                         break;
3091         }
3092 
3093         if (sig == 0)
3094                 list_for_each_entry(t, &pktgen_threads, th_list)
3095                         t->control |= (T_STOP);
3096 
3097         mutex_unlock(&pktgen_thread_lock);
3098         return sig;
3099 }
3100 
3101 static void pktgen_run_all_threads(void)
3102 {
3103         struct pktgen_thread *t;
3104 
3105         func_enter();
3106 
3107         mutex_lock(&pktgen_thread_lock);
3108 
3109         list_for_each_entry(t, &pktgen_threads, th_list)
3110                 t->control |= (T_RUN);
3111 
3112         mutex_unlock(&pktgen_thread_lock);
3113 
3114         /* Propagate thread->control  */
3115         schedule_timeout_interruptible(msecs_to_jiffies(125));
3116 
3117         pktgen_wait_all_threads_run();
3118 }
3119 
3120 static void pktgen_reset_all_threads(void)
3121 {
3122         struct pktgen_thread *t;
3123 
3124         func_enter();
3125 
3126         mutex_lock(&pktgen_thread_lock);
3127 
3128         list_for_each_entry(t, &pktgen_threads, th_list)
3129                 t->control |= (T_REMDEVALL);
3130 
3131         mutex_unlock(&pktgen_thread_lock);
3132 
3133         /* Propagate thread->control  */
3134         schedule_timeout_interruptible(msecs_to_jiffies(125));
3135 
3136         pktgen_wait_all_threads_run();
3137 }
3138 
3139 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3140 {
3141         __u64 bps, mbps, pps;
3142         char *p = pkt_dev->result;
3143         ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3144                                     pkt_dev->started_at);
3145         ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3146 
3147         p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3148                      (unsigned long long)ktime_to_us(elapsed),
3149                      (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3150                      (unsigned long long)ktime_to_us(idle),
3151                      (unsigned long long)pkt_dev->sofar,
3152                      pkt_dev->cur_pkt_size, nr_frags);
3153 
3154         pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3155                         ktime_to_ns(elapsed));
3156 
3157         bps = pps * 8 * pkt_dev->cur_pkt_size;
3158 
3159         mbps = bps;
3160         do_div(mbps, 1000000);
3161         p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
3162                      (unsigned long long)pps,
3163                      (unsigned long long)mbps,
3164                      (unsigned long long)bps,
3165                      (unsigned long long)pkt_dev->errors);
3166 }
3167 
3168 /* Set stopped-at timer, remove from running list, do counters & statistics */
3169 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3170 {
3171         int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3172 
3173         if (!pkt_dev->running) {
3174                 pr_warning("interface: %s is already stopped\n",
3175                            pkt_dev->odevname);
3176                 return -EINVAL;
3177         }
3178 
3179         kfree_skb(pkt_dev->skb);
3180         pkt_dev->skb = NULL;
3181         pkt_dev->stopped_at = ktime_now();
3182         pkt_dev->running = 0;
3183 
3184         show_results(pkt_dev, nr_frags);
3185 
3186         return 0;
3187 }
3188 
3189 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3190 {
3191         struct pktgen_dev *pkt_dev, *best = NULL;
3192 
3193         if_lock(t);
3194 
3195         list_for_each_entry(pkt_dev, &t->if_list, list) {
3196                 if (!pkt_dev->running)
3197                         continue;
3198                 if (best == NULL)
3199                         best = pkt_dev;
3200                 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3201                         best = pkt_dev;
3202         }
3203         if_unlock(t);
3204         return best;
3205 }
3206 
3207 static void pktgen_stop(struct pktgen_thread *t)
3208 {
3209         struct pktgen_dev *pkt_dev;
3210 
3211         func_enter();
3212 
3213         if_lock(t);
3214 
3215         list_for_each_entry(pkt_dev, &t->if_list, list) {
3216                 pktgen_stop_device(pkt_dev);
3217         }
3218 
3219         if_unlock(t);
3220 }
3221 
3222 /*
3223  * one of our devices needs to be removed - find it
3224  * and remove it
3225  */
3226 static void pktgen_rem_one_if(struct pktgen_thread *t)
3227 {
3228         struct list_head *q, *n;
3229         struct pktgen_dev *cur;
3230 
3231         func_enter();
3232 
3233         if_lock(t);
3234 
3235         list_for_each_safe(q, n, &t->if_list) {
3236                 cur = list_entry(q, struct pktgen_dev, list);
3237 
3238                 if (!cur->removal_mark)
3239                         continue;
3240 
3241                 kfree_skb(cur->skb);
3242                 cur->skb = NULL;
3243 
3244                 pktgen_remove_device(t, cur);
3245 
3246                 break;
3247         }
3248 
3249         if_unlock(t);
3250 }
3251 
3252 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3253 {
3254         struct list_head *q, *n;
3255         struct pktgen_dev *cur;
3256 
3257         func_enter();
3258 
3259         /* Remove all devices, free mem */
3260 
3261         if_lock(t);
3262 
3263         list_for_each_safe(q, n, &t->if_list) {
3264                 cur = list_entry(q, struct pktgen_dev, list);
3265 
3266                 kfree_skb(cur->skb);
3267                 cur->skb = NULL;
3268 
3269                 pktgen_remove_device(t, cur);
3270         }
3271 
3272         if_unlock(t);
3273 }
3274 
3275 static void pktgen_rem_thread(struct pktgen_thread *t)
3276 {
3277         /* Remove from the thread list */
3278 
3279         remove_proc_entry(t->tsk->comm, pg_proc_dir);
3280 
3281 }
3282 
3283 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3284 {
3285         ktime_t idle_start = ktime_now();
3286         schedule();
3287         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3288 }
3289 
3290 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3291 {
3292         ktime_t idle_start = ktime_now();
3293 
3294         while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3295                 if (signal_pending(current))
3296                         break;
3297 
3298                 if (need_resched())
3299                         pktgen_resched(pkt_dev);
3300                 else
3301                         cpu_relax();
3302         }
3303         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3304 }
3305 
3306 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3307 {
3308         struct net_device *odev = pkt_dev->odev;
3309         netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3310                 = odev->netdev_ops->ndo_start_xmit;
3311         struct netdev_queue *txq;
3312         u16 queue_map;
3313         int ret;
3314 
3315         /* If device is offline, then don't send */
3316         if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3317                 pktgen_stop_device(pkt_dev);
3318                 return;
3319         }
3320 
3321         /* This is max DELAY, this has special meaning of
3322          * "never transmit"
3323          */
3324         if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3325                 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3326                 return;
3327         }
3328 
3329         /* If no skb or clone count exhausted then get new one */
3330         if (!pkt_dev->skb || (pkt_dev->last_ok &&
3331                               ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3332                 /* build a new pkt */
3333                 kfree_skb(pkt_dev->skb);
3334 
3335                 pkt_dev->skb = fill_packet(odev, pkt_dev);
3336                 if (pkt_dev->skb == NULL) {
3337                         pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3338                         schedule();
3339                         pkt_dev->clone_count--; /* back out increment, OOM */
3340                         return;
3341                 }
3342                 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3343                 pkt_dev->allocated_skbs++;
3344                 pkt_dev->clone_count = 0;       /* reset counter */
3345         }
3346 
3347         if (pkt_dev->delay && pkt_dev->last_ok)
3348                 spin(pkt_dev, pkt_dev->next_tx);
3349 
3350         queue_map = skb_get_queue_mapping(pkt_dev->skb);
3351         txq = netdev_get_tx_queue(odev, queue_map);
3352 
3353         __netif_tx_lock_bh(txq);
3354 
3355         if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3356                 ret = NETDEV_TX_BUSY;
3357                 pkt_dev->last_ok = 0;
3358                 goto unlock;
3359         }
3360         atomic_inc(&(pkt_dev->skb->users));
3361         ret = (*xmit)(pkt_dev->skb, odev);
3362 
3363         switch (ret) {
3364         case NETDEV_TX_OK:
3365                 txq_trans_update(txq);
3366                 pkt_dev->last_ok = 1;
3367                 pkt_dev->sofar++;
3368                 pkt_dev->seq_num++;
3369                 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3370                 break;
3371         case NET_XMIT_DROP:
3372         case NET_XMIT_CN:
3373         case NET_XMIT_POLICED:
3374                 /* skb has been consumed */
3375                 pkt_dev->errors++;
3376                 break;
3377         default: /* Drivers are not supposed to return other values! */
3378                 if (net_ratelimit())
3379                         pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3380                 pkt_dev->errors++;
3381                 /* fallthru */
3382         case NETDEV_TX_LOCKED:
3383         case NETDEV_TX_BUSY:
3384                 /* Retry it next time */
3385                 atomic_dec(&(pkt_dev->skb->users));
3386                 pkt_dev->last_ok = 0;
3387         }
3388 unlock:
3389         __netif_tx_unlock_bh(txq);
3390 
3391         /* If pkt_dev->count is zero, then run forever */
3392         if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3393                 pktgen_wait_for_skb(pkt_dev);
3394 
3395                 /* Done with this */
3396                 pktgen_stop_device(pkt_dev);
3397         }
3398 }
3399 
3400 /*
3401  * Main loop of the thread goes here
3402  */
3403 
3404 static int pktgen_thread_worker(void *arg)
3405 {
3406         DEFINE_WAIT(wait);
3407         struct pktgen_thread *t = arg;
3408         struct pktgen_dev *pkt_dev = NULL;
3409         int cpu = t->cpu;
3410 
3411         BUG_ON(smp_processor_id() != cpu);
3412 
3413         init_waitqueue_head(&t->queue);
3414         complete(&t->start_done);
3415 
3416         pr_debug("starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
3417 
3418         set_current_state(TASK_INTERRUPTIBLE);
3419 
3420         set_freezable();
3421 
3422         while (!kthread_should_stop()) {
3423                 pkt_dev = next_to_run(t);
3424 
3425                 if (unlikely(!pkt_dev && t->control == 0)) {
3426                         if (pktgen_exiting)
3427                                 break;
3428                         wait_event_interruptible_timeout(t->queue,
3429                                                          t->control != 0,
3430                                                          HZ/10);
3431                         try_to_freeze();
3432                         continue;
3433                 }
3434 
3435                 __set_current_state(TASK_RUNNING);
3436 
3437                 if (likely(pkt_dev)) {
3438                         pktgen_xmit(pkt_dev);
3439 
3440                         if (need_resched())
3441                                 pktgen_resched(pkt_dev);
3442                         else
3443                                 cpu_relax();
3444                 }
3445 
3446                 if (t->control & T_STOP) {
3447                         pktgen_stop(t);
3448                         t->control &= ~(T_STOP);
3449                 }
3450 
3451                 if (t->control & T_RUN) {
3452                         pktgen_run(t);
3453                         t->control &= ~(T_RUN);
3454                 }
3455 
3456                 if (t->control & T_REMDEVALL) {
3457                         pktgen_rem_all_ifs(t);
3458                         t->control &= ~(T_REMDEVALL);
3459                 }
3460 
3461                 if (t->control & T_REMDEV) {
3462                         pktgen_rem_one_if(t);
3463                         t->control &= ~(T_REMDEV);
3464                 }
3465 
3466                 try_to_freeze();
3467 
3468                 set_current_state(TASK_INTERRUPTIBLE);
3469         }
3470 
3471         pr_debug("%s stopping all device\n", t->tsk->comm);
3472         pktgen_stop(t);
3473 
3474         pr_debug("%s removing all device\n", t->tsk->comm);
3475         pktgen_rem_all_ifs(t);
3476 
3477         pr_debug("%s removing thread\n", t->tsk->comm);
3478         pktgen_rem_thread(t);
3479 
3480         /* Wait for kthread_stop */
3481         while (!kthread_should_stop()) {
3482                 set_current_state(TASK_INTERRUPTIBLE);
3483                 schedule();
3484         }
3485         __set_current_state(TASK_RUNNING);
3486 
3487         return 0;
3488 }
3489 
3490 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3491                                           const char *ifname, bool exact)
3492 {
3493         struct pktgen_dev *p, *pkt_dev = NULL;
3494         size_t len = strlen(ifname);
3495 
3496         if_lock(t);
3497         list_for_each_entry(p, &t->if_list, list)
3498                 if (strncmp(p->odevname, ifname, len) == 0) {
3499                         if (p->odevname[len]) {
3500                                 if (exact || p->odevname[len] != '@')
3501                                         continue;
3502                         }
3503                         pkt_dev = p;
3504                         break;
3505                 }
3506 
3507         if_unlock(t);
3508         pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3509         return pkt_dev;
3510 }
3511 
3512 /*
3513  * Adds a dev at front of if_list.
3514  */
3515 
3516 static int add_dev_to_thread(struct pktgen_thread *t,
3517                              struct pktgen_dev *pkt_dev)
3518 {
3519         int rv = 0;
3520 
3521         if_lock(t);
3522 
3523         if (pkt_dev->pg_thread) {
3524                 pr_err("ERROR: already assigned to a thread\n");
3525                 rv = -EBUSY;
3526                 goto out;
3527         }
3528 
3529         list_add(&pkt_dev->list, &t->if_list);
3530         pkt_dev->pg_thread = t;
3531         pkt_dev->running = 0;
3532 
3533 out:
3534         if_unlock(t);
3535         return rv;
3536 }
3537 
3538 /* Called under thread lock */
3539 
3540 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3541 {
3542         struct pktgen_dev *pkt_dev;
3543         int err;
3544         int node = cpu_to_node(t->cpu);
3545 
3546         /* We don't allow a device to be on several threads */
3547 
3548         pkt_dev = __pktgen_NN_threads(ifname, FIND);
3549         if (pkt_dev) {
3550                 pr_err("ERROR: interface already used\n");
3551                 return -EBUSY;
3552         }
3553 
3554         pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3555         if (!pkt_dev)
3556                 return -ENOMEM;
3557 
3558         strcpy(pkt_dev->odevname, ifname);
3559         pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3560                                       node);
3561         if (pkt_dev->flows == NULL) {
3562                 kfree(pkt_dev);
3563                 return -ENOMEM;
3564         }
3565 
3566         pkt_dev->removal_mark = 0;
3567         pkt_dev->min_pkt_size = ETH_ZLEN;
3568         pkt_dev->max_pkt_size = ETH_ZLEN;
3569         pkt_dev->nfrags = 0;
3570         pkt_dev->delay = pg_delay_d;
3571         pkt_dev->count = pg_count_d;
3572         pkt_dev->sofar = 0;
3573         pkt_dev->udp_src_min = 9;       /* sink port */
3574         pkt_dev->udp_src_max = 9;
3575         pkt_dev->udp_dst_min = 9;
3576         pkt_dev->udp_dst_max = 9;
3577         pkt_dev->vlan_p = 0;
3578         pkt_dev->vlan_cfi = 0;
3579         pkt_dev->vlan_id = 0xffff;
3580         pkt_dev->svlan_p = 0;
3581         pkt_dev->svlan_cfi = 0;
3582         pkt_dev->svlan_id = 0xffff;
3583         pkt_dev->node = -1;
3584 
3585         err = pktgen_setup_dev(pkt_dev, ifname);
3586         if (err)
3587                 goto out1;
3588         if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3589                 pkt_dev->clone_skb = pg_clone_skb_d;
3590 
3591         pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3592                                           &pktgen_if_fops, pkt_dev);
3593         if (!pkt_dev->entry) {
3594                 pr_err("cannot create %s/%s procfs entry\n",
3595                        PG_PROC_DIR, ifname);
3596                 err = -EINVAL;
3597                 goto out2;
3598         }
3599 #ifdef CONFIG_XFRM
3600         pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3601         pkt_dev->ipsproto = IPPROTO_ESP;
3602 #endif
3603 
3604         return add_dev_to_thread(t, pkt_dev);
3605 out2:
3606         dev_put(pkt_dev->odev);
3607 out1:
3608 #ifdef CONFIG_XFRM
3609         free_SAs(pkt_dev);
3610 #endif
3611         vfree(pkt_dev->flows);
3612         kfree(pkt_dev);
3613         return err;
3614 }
3615 
3616 static int __init pktgen_create_thread(int cpu)
3617 {
3618         struct pktgen_thread *t;
3619         struct proc_dir_entry *pe;
3620         struct task_struct *p;
3621 
3622         t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3623                          cpu_to_node(cpu));
3624         if (!t) {
3625                 pr_err("ERROR: out of memory, can't create new thread\n");
3626                 return -ENOMEM;
3627         }
3628 
3629         spin_lock_init(&t->if_lock);
3630         t->cpu = cpu;
3631 
3632         INIT_LIST_HEAD(&t->if_list);
3633 
3634         list_add_tail(&t->th_list, &pktgen_threads);
3635         init_completion(&t->start_done);
3636 
3637         p = kthread_create_on_node(pktgen_thread_worker,
3638                                    t,
3639                                    cpu_to_node(cpu),
3640                                    "kpktgend_%d", cpu);
3641         if (IS_ERR(p)) {
3642                 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3643                 list_del(&t->th_list);
3644                 kfree(t);
3645                 return PTR_ERR(p);
3646         }
3647         kthread_bind(p, cpu);
3648         t->tsk = p;
3649 
3650         pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3651                               &pktgen_thread_fops, t);
3652         if (!pe) {
3653                 pr_err("cannot create %s/%s procfs entry\n",
3654                        PG_PROC_DIR, t->tsk->comm);
3655                 kthread_stop(p);
3656                 list_del(&t->th_list);
3657                 kfree(t);
3658                 return -EINVAL;
3659         }
3660 
3661         wake_up_process(p);
3662         wait_for_completion(&t->start_done);
3663 
3664         return 0;
3665 }
3666 
3667 /*
3668  * Removes a device from the thread if_list.
3669  */
3670 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3671                                   struct pktgen_dev *pkt_dev)
3672 {
3673         struct list_head *q, *n;
3674         struct pktgen_dev *p;
3675 
3676         list_for_each_safe(q, n, &t->if_list) {
3677                 p = list_entry(q, struct pktgen_dev, list);
3678                 if (p == pkt_dev)
3679                         list_del(&p->list);
3680         }
3681 }
3682 
3683 static int pktgen_remove_device(struct pktgen_thread *t,
3684                                 struct pktgen_dev *pkt_dev)
3685 {
3686 
3687         pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3688 
3689         if (pkt_dev->running) {
3690                 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3691                 pktgen_stop_device(pkt_dev);
3692         }
3693 
3694         /* Dis-associate from the interface */
3695 
3696         if (pkt_dev->odev) {
3697                 dev_put(pkt_dev->odev);
3698                 pkt_dev->odev = NULL;
3699         }
3700 
3701         /* And update the thread if_list */
3702 
3703         _rem_dev_from_if_list(t, pkt_dev);
3704 
3705         if (pkt_dev->entry)
3706                 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3707 
3708 #ifdef CONFIG_XFRM
3709         free_SAs(pkt_dev);
3710 #endif
3711         vfree(pkt_dev->flows);
3712         if (pkt_dev->page)
3713                 put_page(pkt_dev->page);
3714         kfree(pkt_dev);
3715         return 0;
3716 }
3717 
3718 static int __init pg_init(void)
3719 {
3720         int cpu;
3721         struct proc_dir_entry *pe;
3722         int ret = 0;
3723 
3724         pr_info("%s", version);
3725 
3726         pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3727         if (!pg_proc_dir)
3728                 return -ENODEV;
3729 
3730         pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3731         if (pe == NULL) {
3732                 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3733                 ret = -EINVAL;
3734                 goto remove_dir;
3735         }
3736 
3737         register_netdevice_notifier(&pktgen_notifier_block);
3738 
3739         for_each_online_cpu(cpu) {
3740                 int err;
3741 
3742                 err = pktgen_create_thread(cpu);
3743                 if (err)
3744                         pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3745                                    cpu, err);
3746         }
3747 
3748         if (list_empty(&pktgen_threads)) {
3749                 pr_err("ERROR: Initialization failed for all threads\n");
3750                 ret = -ENODEV;
3751                 goto unregister;
3752         }
3753 
3754         return 0;
3755 
3756  unregister:
3757         unregister_netdevice_notifier(&pktgen_notifier_block);
3758         remove_proc_entry(PGCTRL, pg_proc_dir);
3759  remove_dir:
3760         proc_net_remove(&init_net, PG_PROC_DIR);
3761         return ret;
3762 }
3763 
3764 static void __exit pg_cleanup(void)
3765 {
3766         struct pktgen_thread *t;
3767         struct list_head *q, *n;
3768         LIST_HEAD(list);
3769 
3770         /* Stop all interfaces & threads */
3771         pktgen_exiting = true;
3772 
3773         mutex_lock(&pktgen_thread_lock);
3774         list_splice_init(&pktgen_threads, &list);
3775         mutex_unlock(&pktgen_thread_lock);
3776 
3777         list_for_each_safe(q, n, &list) {
3778                 t = list_entry(q, struct pktgen_thread, th_list);
3779                 list_del(&t->th_list);
3780                 kthread_stop(t->tsk);
3781                 kfree(t);
3782         }
3783 
3784         /* Un-register us from receiving netdevice events */
3785         unregister_netdevice_notifier(&pktgen_notifier_block);
3786 
3787         /* Clean up proc file system */
3788         remove_proc_entry(PGCTRL, pg_proc_dir);
3789         proc_net_remove(&init_net, PG_PROC_DIR);
3790 }
3791 
3792 module_init(pg_init);
3793 module_exit(pg_cleanup);
3794 
3795 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3796 MODULE_DESCRIPTION("Packet Generator tool");
3797 MODULE_LICENSE("GPL");
3798 MODULE_VERSION(VERSION);
3799 module_param(pg_count_d, int, 0);
3800 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3801 module_param(pg_delay_d, int, 0);
3802 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3803 module_param(pg_clone_skb_d, int, 0);
3804 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3805 module_param(debug, int, 0);
3806 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
3807 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp