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

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  1 /*
  2  * Authors:
  3  * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
  4  *                             Uppsala University and
  5  *                             Swedish University of Agricultural Sciences
  6  *
  7  * Alexey Kuznetsov  <kuznet@ms2.inr.ac.ru>
  8  * Ben Greear <greearb@candelatech.com>
  9  * Jens Låås <jens.laas@data.slu.se>
 10  *
 11  * This program is free software; you can redistribute it and/or
 12  * modify it under the terms of the GNU General Public License
 13  * as published by the Free Software Foundation; either version
 14  * 2 of the License, or (at your option) any later version.
 15  *
 16  *
 17  * A tool for loading the network with preconfigurated packets.
 18  * The tool is implemented as a linux module.  Parameters are output
 19  * device, delay (to hard_xmit), number of packets, and whether
 20  * to use multiple SKBs or just the same one.
 21  * pktgen uses the installed interface's output routine.
 22  *
 23  * Additional hacking by:
 24  *
 25  * Jens.Laas@data.slu.se
 26  * Improved by ANK. 010120.
 27  * Improved by ANK even more. 010212.
 28  * MAC address typo fixed. 010417 --ro
 29  * Integrated.  020301 --DaveM
 30  * Added multiskb option 020301 --DaveM
 31  * Scaling of results. 020417--sigurdur@linpro.no
 32  * Significant re-work of the module:
 33  *   *  Convert to threaded model to more efficiently be able to transmit
 34  *       and receive on multiple interfaces at once.
 35  *   *  Converted many counters to __u64 to allow longer runs.
 36  *   *  Allow configuration of ranges, like min/max IP address, MACs,
 37  *       and UDP-ports, for both source and destination, and can
 38  *       set to use a random distribution or sequentially walk the range.
 39  *   *  Can now change most values after starting.
 40  *   *  Place 12-byte packet in UDP payload with magic number,
 41  *       sequence number, and timestamp.
 42  *   *  Add receiver code that detects dropped pkts, re-ordered pkts, and
 43  *       latencies (with micro-second) precision.
 44  *   *  Add IOCTL interface to easily get counters & configuration.
 45  *   --Ben Greear <greearb@candelatech.com>
 46  *
 47  * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
 48  * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
 49  * as a "fastpath" with a configurable number of clones after alloc's.
 50  * clone_skb=0 means all packets are allocated this also means ranges time
 51  * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
 52  * clones.
 53  *
 54  * Also moved to /proc/net/pktgen/
 55  * --ro
 56  *
 57  * Sept 10:  Fixed threading/locking.  Lots of bone-headed and more clever
 58  *    mistakes.  Also merged in DaveM's patch in the -pre6 patch.
 59  * --Ben Greear <greearb@candelatech.com>
 60  *
 61  * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
 62  *
 63  *
 64  * 021124 Finished major redesign and rewrite for new functionality.
 65  * See Documentation/networking/pktgen.txt for how to use this.
 66  *
 67  * The new operation:
 68  * For each CPU one thread/process is created at start. This process checks
 69  * for running devices in the if_list and sends packets until count is 0 it
 70  * also the thread checks the thread->control which is used for inter-process
 71  * communication. controlling process "posts" operations to the threads this
 72  * way.
 73  * The if_list is RCU protected, and the if_lock remains to protect updating
 74  * of if_list, from "add_device" as it invoked from userspace (via proc write).
 75  *
 76  * By design there should only be *one* "controlling" process. In practice
 77  * multiple write accesses gives unpredictable result. Understood by "write"
 78  * to /proc gives result code thats should be read be the "writer".
 79  * For practical use this should be no problem.
 80  *
 81  * Note when adding devices to a specific CPU there good idea to also assign
 82  * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
 83  * --ro
 84  *
 85  * Fix refcount off by one if first packet fails, potential null deref,
 86  * memleak 030710- KJP
 87  *
 88  * First "ranges" functionality for ipv6 030726 --ro
 89  *
 90  * Included flow support. 030802 ANK.
 91  *
 92  * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
 93  *
 94  * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
 95  * ia64 compilation fix from  Aron Griffis <aron@hp.com> 040604
 96  *
 97  * New xmit() return, do_div and misc clean up by Stephen Hemminger
 98  * <shemminger@osdl.org> 040923
 99  *
100  * Randy Dunlap fixed u64 printk compiler warning
101  *
102  * Remove FCS from BW calculation.  Lennert Buytenhek <buytenh@wantstofly.org>
103  * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104  *
105  * Corrections from Nikolai Malykh (nmalykh@bilim.com)
106  * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107  *
108  * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
109  * 050103
110  *
111  * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112  *
113  * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114  *
115  * Fixed src_mac command to set source mac of packet to value specified in
116  * command by Adit Ranadive <adit.262@gmail.com>
117  *
118  */
119 
120 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121 
122 #include <linux/sys.h>
123 #include <linux/types.h>
124 #include <linux/module.h>
125 #include <linux/moduleparam.h>
126 #include <linux/kernel.h>
127 #include <linux/mutex.h>
128 #include <linux/sched.h>
129 #include <linux/slab.h>
130 #include <linux/vmalloc.h>
131 #include <linux/unistd.h>
132 #include <linux/string.h>
133 #include <linux/ptrace.h>
134 #include <linux/errno.h>
135 #include <linux/ioport.h>
136 #include <linux/interrupt.h>
137 #include <linux/capability.h>
138 #include <linux/hrtimer.h>
139 #include <linux/freezer.h>
140 #include <linux/delay.h>
141 #include <linux/timer.h>
142 #include <linux/list.h>
143 #include <linux/init.h>
144 #include <linux/skbuff.h>
145 #include <linux/netdevice.h>
146 #include <linux/inet.h>
147 #include <linux/inetdevice.h>
148 #include <linux/rtnetlink.h>
149 #include <linux/if_arp.h>
150 #include <linux/if_vlan.h>
151 #include <linux/in.h>
152 #include <linux/ip.h>
153 #include <linux/ipv6.h>
154 #include <linux/udp.h>
155 #include <linux/proc_fs.h>
156 #include <linux/seq_file.h>
157 #include <linux/wait.h>
158 #include <linux/etherdevice.h>
159 #include <linux/kthread.h>
160 #include <linux/prefetch.h>
161 #include <net/net_namespace.h>
162 #include <net/checksum.h>
163 #include <net/ipv6.h>
164 #include <net/udp.h>
165 #include <net/ip6_checksum.h>
166 #include <net/addrconf.h>
167 #ifdef CONFIG_XFRM
168 #include <net/xfrm.h>
169 #endif
170 #include <net/netns/generic.h>
171 #include <asm/byteorder.h>
172 #include <linux/rcupdate.h>
173 #include <linux/bitops.h>
174 #include <linux/io.h>
175 #include <linux/timex.h>
176 #include <linux/uaccess.h>
177 #include <asm/dma.h>
178 #include <asm/div64.h>          /* do_div */
179 
180 #define VERSION "2.75"
181 #define IP_NAME_SZ 32
182 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
183 #define MPLS_STACK_BOTTOM htonl(0x00000100)
184 
185 #define func_enter() pr_debug("entering %s\n", __func__);
186 
187 /* Device flag bits */
188 #define F_IPSRC_RND   (1<<0)    /* IP-Src Random  */
189 #define F_IPDST_RND   (1<<1)    /* IP-Dst Random  */
190 #define F_UDPSRC_RND  (1<<2)    /* UDP-Src Random */
191 #define F_UDPDST_RND  (1<<3)    /* UDP-Dst Random */
192 #define F_MACSRC_RND  (1<<4)    /* MAC-Src Random */
193 #define F_MACDST_RND  (1<<5)    /* MAC-Dst Random */
194 #define F_TXSIZE_RND  (1<<6)    /* Transmit size is random */
195 #define F_IPV6        (1<<7)    /* Interface in IPV6 Mode */
196 #define F_MPLS_RND    (1<<8)    /* Random MPLS labels */
197 #define F_VID_RND     (1<<9)    /* Random VLAN ID */
198 #define F_SVID_RND    (1<<10)   /* Random SVLAN ID */
199 #define F_FLOW_SEQ    (1<<11)   /* Sequential flows */
200 #define F_IPSEC_ON    (1<<12)   /* ipsec on for flows */
201 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
202 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
203 #define F_NODE          (1<<15) /* Node memory alloc*/
204 #define F_UDPCSUM       (1<<16) /* Include UDP checksum */
205 #define F_NO_TIMESTAMP  (1<<17) /* Don't timestamp packets (default TS) */
206 
207 /* Thread control flag bits */
208 #define T_STOP        (1<<0)    /* Stop run */
209 #define T_RUN         (1<<1)    /* Start run */
210 #define T_REMDEVALL   (1<<2)    /* Remove all devs */
211 #define T_REMDEV      (1<<3)    /* Remove one dev */
212 
213 /* Xmit modes */
214 #define M_START_XMIT            0       /* Default normal TX */
215 #define M_NETIF_RECEIVE         1       /* Inject packets into stack */
216 
217 /* If lock -- protects updating of if_list */
218 #define   if_lock(t)           spin_lock(&(t->if_lock));
219 #define   if_unlock(t)           spin_unlock(&(t->if_lock));
220 
221 /* Used to help with determining the pkts on receive */
222 #define PKTGEN_MAGIC 0xbe9be955
223 #define PG_PROC_DIR "pktgen"
224 #define PGCTRL      "pgctrl"
225 
226 #define MAX_CFLOWS  65536
227 
228 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
229 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
230 
231 struct flow_state {
232         __be32 cur_daddr;
233         int count;
234 #ifdef CONFIG_XFRM
235         struct xfrm_state *x;
236 #endif
237         __u32 flags;
238 };
239 
240 /* flow flag bits */
241 #define F_INIT   (1<<0)         /* flow has been initialized */
242 
243 struct pktgen_dev {
244         /*
245          * Try to keep frequent/infrequent used vars. separated.
246          */
247         struct proc_dir_entry *entry;   /* proc file */
248         struct pktgen_thread *pg_thread;/* the owner */
249         struct list_head list;          /* chaining in the thread's run-queue */
250         struct rcu_head  rcu;           /* freed by RCU */
251 
252         int running;            /* if false, the test will stop */
253 
254         /* If min != max, then we will either do a linear iteration, or
255          * we will do a random selection from within the range.
256          */
257         __u32 flags;
258         int xmit_mode;
259         int min_pkt_size;
260         int max_pkt_size;
261         int pkt_overhead;       /* overhead for MPLS, VLANs, IPSEC etc */
262         int nfrags;
263         int removal_mark;       /* non-zero => the device is marked for
264                                  * removal by worker thread */
265 
266         struct page *page;
267         u64 delay;              /* nano-seconds */
268 
269         __u64 count;            /* Default No packets to send */
270         __u64 sofar;            /* How many pkts we've sent so far */
271         __u64 tx_bytes;         /* How many bytes we've transmitted */
272         __u64 errors;           /* Errors when trying to transmit, */
273 
274         /* runtime counters relating to clone_skb */
275 
276         __u32 clone_count;
277         int last_ok;            /* Was last skb sent?
278                                  * Or a failed transmit of some sort?
279                                  * This will keep sequence numbers in order
280                                  */
281         ktime_t next_tx;
282         ktime_t started_at;
283         ktime_t stopped_at;
284         u64     idle_acc;       /* nano-seconds */
285 
286         __u32 seq_num;
287 
288         int clone_skb;          /*
289                                  * Use multiple SKBs during packet gen.
290                                  * If this number is greater than 1, then
291                                  * that many copies of the same packet will be
292                                  * sent before a new packet is allocated.
293                                  * If you want to send 1024 identical packets
294                                  * before creating a new packet,
295                                  * set clone_skb to 1024.
296                                  */
297 
298         char dst_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
299         char dst_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
300         char src_min[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
301         char src_max[IP_NAME_SZ];       /* IP, ie 1.2.3.4 */
302 
303         struct in6_addr in6_saddr;
304         struct in6_addr in6_daddr;
305         struct in6_addr cur_in6_daddr;
306         struct in6_addr cur_in6_saddr;
307         /* For ranges */
308         struct in6_addr min_in6_daddr;
309         struct in6_addr max_in6_daddr;
310         struct in6_addr min_in6_saddr;
311         struct in6_addr max_in6_saddr;
312 
313         /* If we're doing ranges, random or incremental, then this
314          * defines the min/max for those ranges.
315          */
316         __be32 saddr_min;       /* inclusive, source IP address */
317         __be32 saddr_max;       /* exclusive, source IP address */
318         __be32 daddr_min;       /* inclusive, dest IP address */
319         __be32 daddr_max;       /* exclusive, dest IP address */
320 
321         __u16 udp_src_min;      /* inclusive, source UDP port */
322         __u16 udp_src_max;      /* exclusive, source UDP port */
323         __u16 udp_dst_min;      /* inclusive, dest UDP port */
324         __u16 udp_dst_max;      /* exclusive, dest UDP port */
325 
326         /* DSCP + ECN */
327         __u8 tos;            /* six MSB of (former) IPv4 TOS
328                                 are for dscp codepoint */
329         __u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6
330                                 (see RFC 3260, sec. 4) */
331 
332         /* MPLS */
333         unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
334         __be32 labels[MAX_MPLS_LABELS];
335 
336         /* VLAN/SVLAN (802.1Q/Q-in-Q) */
337         __u8  vlan_p;
338         __u8  vlan_cfi;
339         __u16 vlan_id;  /* 0xffff means no vlan tag */
340 
341         __u8  svlan_p;
342         __u8  svlan_cfi;
343         __u16 svlan_id; /* 0xffff means no svlan tag */
344 
345         __u32 src_mac_count;    /* How many MACs to iterate through */
346         __u32 dst_mac_count;    /* How many MACs to iterate through */
347 
348         unsigned char dst_mac[ETH_ALEN];
349         unsigned char src_mac[ETH_ALEN];
350 
351         __u32 cur_dst_mac_offset;
352         __u32 cur_src_mac_offset;
353         __be32 cur_saddr;
354         __be32 cur_daddr;
355         __u16 ip_id;
356         __u16 cur_udp_dst;
357         __u16 cur_udp_src;
358         __u16 cur_queue_map;
359         __u32 cur_pkt_size;
360         __u32 last_pkt_size;
361 
362         __u8 hh[14];
363         /* = {
364            0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
365 
366            We fill in SRC address later
367            0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
368            0x08, 0x00
369            };
370          */
371         __u16 pad;              /* pad out the hh struct to an even 16 bytes */
372 
373         struct sk_buff *skb;    /* skb we are to transmit next, used for when we
374                                  * are transmitting the same one multiple times
375                                  */
376         struct net_device *odev; /* The out-going device.
377                                   * Note that the device should have it's
378                                   * pg_info pointer pointing back to this
379                                   * device.
380                                   * Set when the user specifies the out-going
381                                   * device name (not when the inject is
382                                   * started as it used to do.)
383                                   */
384         char odevname[32];
385         struct flow_state *flows;
386         unsigned int cflows;    /* Concurrent flows (config) */
387         unsigned int lflow;             /* Flow length  (config) */
388         unsigned int nflows;    /* accumulated flows (stats) */
389         unsigned int curfl;             /* current sequenced flow (state)*/
390 
391         u16 queue_map_min;
392         u16 queue_map_max;
393         __u32 skb_priority;     /* skb priority field */
394         unsigned int burst;     /* number of duplicated packets to burst */
395         int node;               /* Memory node */
396 
397 #ifdef CONFIG_XFRM
398         __u8    ipsmode;                /* IPSEC mode (config) */
399         __u8    ipsproto;               /* IPSEC type (config) */
400         __u32   spi;
401         struct dst_entry dst;
402         struct dst_ops dstops;
403 #endif
404         char result[512];
405 };
406 
407 struct pktgen_hdr {
408         __be32 pgh_magic;
409         __be32 seq_num;
410         __be32 tv_sec;
411         __be32 tv_usec;
412 };
413 
414 
415 static int pg_net_id __read_mostly;
416 
417 struct pktgen_net {
418         struct net              *net;
419         struct proc_dir_entry   *proc_dir;
420         struct list_head        pktgen_threads;
421         bool                    pktgen_exiting;
422 };
423 
424 struct pktgen_thread {
425         spinlock_t if_lock;             /* for list of devices */
426         struct list_head if_list;       /* All device here */
427         struct list_head th_list;
428         struct task_struct *tsk;
429         char result[512];
430 
431         /* Field for thread to receive "posted" events terminate,
432            stop ifs etc. */
433 
434         u32 control;
435         int cpu;
436 
437         wait_queue_head_t queue;
438         struct completion start_done;
439         struct pktgen_net *net;
440 };
441 
442 #define REMOVE 1
443 #define FIND   0
444 
445 static const char version[] =
446         "Packet Generator for packet performance testing. "
447         "Version: " VERSION "\n";
448 
449 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
450 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
451 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
452                                           const char *ifname, bool exact);
453 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
454 static void pktgen_run_all_threads(struct pktgen_net *pn);
455 static void pktgen_reset_all_threads(struct pktgen_net *pn);
456 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
457 
458 static void pktgen_stop(struct pktgen_thread *t);
459 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
460 
461 /* Module parameters, defaults. */
462 static int pg_count_d __read_mostly = 1000;
463 static int pg_delay_d __read_mostly;
464 static int pg_clone_skb_d  __read_mostly;
465 static int debug  __read_mostly;
466 
467 static DEFINE_MUTEX(pktgen_thread_lock);
468 
469 static struct notifier_block pktgen_notifier_block = {
470         .notifier_call = pktgen_device_event,
471 };
472 
473 /*
474  * /proc handling functions
475  *
476  */
477 
478 static int pgctrl_show(struct seq_file *seq, void *v)
479 {
480         seq_puts(seq, version);
481         return 0;
482 }
483 
484 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
485                             size_t count, loff_t *ppos)
486 {
487         char data[128];
488         struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
489 
490         if (!capable(CAP_NET_ADMIN))
491                 return -EPERM;
492 
493         if (count == 0)
494                 return -EINVAL;
495 
496         if (count > sizeof(data))
497                 count = sizeof(data);
498 
499         if (copy_from_user(data, buf, count))
500                 return -EFAULT;
501 
502         data[count - 1] = 0;    /* Strip trailing '\n' and terminate string */
503 
504         if (!strcmp(data, "stop"))
505                 pktgen_stop_all_threads_ifs(pn);
506 
507         else if (!strcmp(data, "start"))
508                 pktgen_run_all_threads(pn);
509 
510         else if (!strcmp(data, "reset"))
511                 pktgen_reset_all_threads(pn);
512 
513         else
514                 return -EINVAL;
515 
516         return count;
517 }
518 
519 static int pgctrl_open(struct inode *inode, struct file *file)
520 {
521         return single_open(file, pgctrl_show, PDE_DATA(inode));
522 }
523 
524 static const struct file_operations pktgen_fops = {
525         .owner   = THIS_MODULE,
526         .open    = pgctrl_open,
527         .read    = seq_read,
528         .llseek  = seq_lseek,
529         .write   = pgctrl_write,
530         .release = single_release,
531 };
532 
533 static int pktgen_if_show(struct seq_file *seq, void *v)
534 {
535         const struct pktgen_dev *pkt_dev = seq->private;
536         ktime_t stopped;
537         u64 idle;
538 
539         seq_printf(seq,
540                    "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
541                    (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
542                    pkt_dev->max_pkt_size);
543 
544         seq_printf(seq,
545                    "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
546                    pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
547                    pkt_dev->clone_skb, pkt_dev->odevname);
548 
549         seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
550                    pkt_dev->lflow);
551 
552         seq_printf(seq,
553                    "     queue_map_min: %u  queue_map_max: %u\n",
554                    pkt_dev->queue_map_min,
555                    pkt_dev->queue_map_max);
556 
557         if (pkt_dev->skb_priority)
558                 seq_printf(seq, "     skb_priority: %u\n",
559                            pkt_dev->skb_priority);
560 
561         if (pkt_dev->flags & F_IPV6) {
562                 seq_printf(seq,
563                            "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
564                            "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
565                            &pkt_dev->in6_saddr,
566                            &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
567                            &pkt_dev->in6_daddr,
568                            &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
569         } else {
570                 seq_printf(seq,
571                            "     dst_min: %s  dst_max: %s\n",
572                            pkt_dev->dst_min, pkt_dev->dst_max);
573                 seq_printf(seq,
574                            "     src_min: %s  src_max: %s\n",
575                            pkt_dev->src_min, pkt_dev->src_max);
576         }
577 
578         seq_puts(seq, "     src_mac: ");
579 
580         seq_printf(seq, "%pM ",
581                    is_zero_ether_addr(pkt_dev->src_mac) ?
582                              pkt_dev->odev->dev_addr : pkt_dev->src_mac);
583 
584         seq_puts(seq, "dst_mac: ");
585         seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
586 
587         seq_printf(seq,
588                    "     udp_src_min: %d  udp_src_max: %d"
589                    "  udp_dst_min: %d  udp_dst_max: %d\n",
590                    pkt_dev->udp_src_min, pkt_dev->udp_src_max,
591                    pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
592 
593         seq_printf(seq,
594                    "     src_mac_count: %d  dst_mac_count: %d\n",
595                    pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
596 
597         if (pkt_dev->nr_labels) {
598                 unsigned int i;
599                 seq_puts(seq, "     mpls: ");
600                 for (i = 0; i < pkt_dev->nr_labels; i++)
601                         seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
602                                    i == pkt_dev->nr_labels-1 ? "\n" : ", ");
603         }
604 
605         if (pkt_dev->vlan_id != 0xffff)
606                 seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
607                            pkt_dev->vlan_id, pkt_dev->vlan_p,
608                            pkt_dev->vlan_cfi);
609 
610         if (pkt_dev->svlan_id != 0xffff)
611                 seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
612                            pkt_dev->svlan_id, pkt_dev->svlan_p,
613                            pkt_dev->svlan_cfi);
614 
615         if (pkt_dev->tos)
616                 seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);
617 
618         if (pkt_dev->traffic_class)
619                 seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);
620 
621         if (pkt_dev->burst > 1)
622                 seq_printf(seq, "     burst: %d\n", pkt_dev->burst);
623 
624         if (pkt_dev->node >= 0)
625                 seq_printf(seq, "     node: %d\n", pkt_dev->node);
626 
627         if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
628                 seq_puts(seq, "     xmit_mode: netif_receive\n");
629 
630         seq_puts(seq, "     Flags: ");
631 
632         if (pkt_dev->flags & F_IPV6)
633                 seq_puts(seq, "IPV6  ");
634 
635         if (pkt_dev->flags & F_IPSRC_RND)
636                 seq_puts(seq, "IPSRC_RND  ");
637 
638         if (pkt_dev->flags & F_IPDST_RND)
639                 seq_puts(seq, "IPDST_RND  ");
640 
641         if (pkt_dev->flags & F_TXSIZE_RND)
642                 seq_puts(seq, "TXSIZE_RND  ");
643 
644         if (pkt_dev->flags & F_UDPSRC_RND)
645                 seq_puts(seq, "UDPSRC_RND  ");
646 
647         if (pkt_dev->flags & F_UDPDST_RND)
648                 seq_puts(seq, "UDPDST_RND  ");
649 
650         if (pkt_dev->flags & F_UDPCSUM)
651                 seq_puts(seq, "UDPCSUM  ");
652 
653         if (pkt_dev->flags & F_NO_TIMESTAMP)
654                 seq_puts(seq, "NO_TIMESTAMP  ");
655 
656         if (pkt_dev->flags & F_MPLS_RND)
657                 seq_puts(seq,  "MPLS_RND  ");
658 
659         if (pkt_dev->flags & F_QUEUE_MAP_RND)
660                 seq_puts(seq,  "QUEUE_MAP_RND  ");
661 
662         if (pkt_dev->flags & F_QUEUE_MAP_CPU)
663                 seq_puts(seq,  "QUEUE_MAP_CPU  ");
664 
665         if (pkt_dev->cflows) {
666                 if (pkt_dev->flags & F_FLOW_SEQ)
667                         seq_puts(seq,  "FLOW_SEQ  "); /*in sequence flows*/
668                 else
669                         seq_puts(seq,  "FLOW_RND  ");
670         }
671 
672 #ifdef CONFIG_XFRM
673         if (pkt_dev->flags & F_IPSEC_ON) {
674                 seq_puts(seq,  "IPSEC  ");
675                 if (pkt_dev->spi)
676                         seq_printf(seq, "spi:%u", pkt_dev->spi);
677         }
678 #endif
679 
680         if (pkt_dev->flags & F_MACSRC_RND)
681                 seq_puts(seq, "MACSRC_RND  ");
682 
683         if (pkt_dev->flags & F_MACDST_RND)
684                 seq_puts(seq, "MACDST_RND  ");
685 
686         if (pkt_dev->flags & F_VID_RND)
687                 seq_puts(seq, "VID_RND  ");
688 
689         if (pkt_dev->flags & F_SVID_RND)
690                 seq_puts(seq, "SVID_RND  ");
691 
692         if (pkt_dev->flags & F_NODE)
693                 seq_puts(seq, "NODE_ALLOC  ");
694 
695         seq_puts(seq, "\n");
696 
697         /* not really stopped, more like last-running-at */
698         stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
699         idle = pkt_dev->idle_acc;
700         do_div(idle, NSEC_PER_USEC);
701 
702         seq_printf(seq,
703                    "Current:\n     pkts-sofar: %llu  errors: %llu\n",
704                    (unsigned long long)pkt_dev->sofar,
705                    (unsigned long long)pkt_dev->errors);
706 
707         seq_printf(seq,
708                    "     started: %lluus  stopped: %lluus idle: %lluus\n",
709                    (unsigned long long) ktime_to_us(pkt_dev->started_at),
710                    (unsigned long long) ktime_to_us(stopped),
711                    (unsigned long long) idle);
712 
713         seq_printf(seq,
714                    "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
715                    pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
716                    pkt_dev->cur_src_mac_offset);
717 
718         if (pkt_dev->flags & F_IPV6) {
719                 seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
720                                 &pkt_dev->cur_in6_saddr,
721                                 &pkt_dev->cur_in6_daddr);
722         } else
723                 seq_printf(seq, "     cur_saddr: %pI4  cur_daddr: %pI4\n",
724                            &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
725 
726         seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
727                    pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
728 
729         seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);
730 
731         seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
732 
733         if (pkt_dev->result[0])
734                 seq_printf(seq, "Result: %s\n", pkt_dev->result);
735         else
736                 seq_puts(seq, "Result: Idle\n");
737 
738         return 0;
739 }
740 
741 
742 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
743                      __u32 *num)
744 {
745         int i = 0;
746         *num = 0;
747 
748         for (; i < maxlen; i++) {
749                 int value;
750                 char c;
751                 *num <<= 4;
752                 if (get_user(c, &user_buffer[i]))
753                         return -EFAULT;
754                 value = hex_to_bin(c);
755                 if (value >= 0)
756                         *num |= value;
757                 else
758                         break;
759         }
760         return i;
761 }
762 
763 static int count_trail_chars(const char __user * user_buffer,
764                              unsigned int maxlen)
765 {
766         int i;
767 
768         for (i = 0; i < maxlen; i++) {
769                 char c;
770                 if (get_user(c, &user_buffer[i]))
771                         return -EFAULT;
772                 switch (c) {
773                 case '\"':
774                 case '\n':
775                 case '\r':
776                 case '\t':
777                 case ' ':
778                 case '=':
779                         break;
780                 default:
781                         goto done;
782                 }
783         }
784 done:
785         return i;
786 }
787 
788 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
789                                 unsigned long *num)
790 {
791         int i;
792         *num = 0;
793 
794         for (i = 0; i < maxlen; i++) {
795                 char c;
796                 if (get_user(c, &user_buffer[i]))
797                         return -EFAULT;
798                 if ((c >= '') && (c <= '9')) {
799                         *num *= 10;
800                         *num += c - '';
801                 } else
802                         break;
803         }
804         return i;
805 }
806 
807 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
808 {
809         int i;
810 
811         for (i = 0; i < maxlen; i++) {
812                 char c;
813                 if (get_user(c, &user_buffer[i]))
814                         return -EFAULT;
815                 switch (c) {
816                 case '\"':
817                 case '\n':
818                 case '\r':
819                 case '\t':
820                 case ' ':
821                         goto done_str;
822                 default:
823                         break;
824                 }
825         }
826 done_str:
827         return i;
828 }
829 
830 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
831 {
832         unsigned int n = 0;
833         char c;
834         ssize_t i = 0;
835         int len;
836 
837         pkt_dev->nr_labels = 0;
838         do {
839                 __u32 tmp;
840                 len = hex32_arg(&buffer[i], 8, &tmp);
841                 if (len <= 0)
842                         return len;
843                 pkt_dev->labels[n] = htonl(tmp);
844                 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
845                         pkt_dev->flags |= F_MPLS_RND;
846                 i += len;
847                 if (get_user(c, &buffer[i]))
848                         return -EFAULT;
849                 i++;
850                 n++;
851                 if (n >= MAX_MPLS_LABELS)
852                         return -E2BIG;
853         } while (c == ',');
854 
855         pkt_dev->nr_labels = n;
856         return i;
857 }
858 
859 static ssize_t pktgen_if_write(struct file *file,
860                                const char __user * user_buffer, size_t count,
861                                loff_t * offset)
862 {
863         struct seq_file *seq = file->private_data;
864         struct pktgen_dev *pkt_dev = seq->private;
865         int i, max, len;
866         char name[16], valstr[32];
867         unsigned long value = 0;
868         char *pg_result = NULL;
869         int tmp = 0;
870         char buf[128];
871 
872         pg_result = &(pkt_dev->result[0]);
873 
874         if (count < 1) {
875                 pr_warn("wrong command format\n");
876                 return -EINVAL;
877         }
878 
879         max = count;
880         tmp = count_trail_chars(user_buffer, max);
881         if (tmp < 0) {
882                 pr_warn("illegal format\n");
883                 return tmp;
884         }
885         i = tmp;
886 
887         /* Read variable name */
888 
889         len = strn_len(&user_buffer[i], sizeof(name) - 1);
890         if (len < 0)
891                 return len;
892 
893         memset(name, 0, sizeof(name));
894         if (copy_from_user(name, &user_buffer[i], len))
895                 return -EFAULT;
896         i += len;
897 
898         max = count - i;
899         len = count_trail_chars(&user_buffer[i], max);
900         if (len < 0)
901                 return len;
902 
903         i += len;
904 
905         if (debug) {
906                 size_t copy = min_t(size_t, count, 1023);
907                 char tb[copy + 1];
908                 if (copy_from_user(tb, user_buffer, copy))
909                         return -EFAULT;
910                 tb[copy] = 0;
911                 pr_debug("%s,%lu  buffer -:%s:-\n",
912                          name, (unsigned long)count, tb);
913         }
914 
915         if (!strcmp(name, "min_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->min_pkt_size) {
924                         pkt_dev->min_pkt_size = value;
925                         pkt_dev->cur_pkt_size = value;
926                 }
927                 sprintf(pg_result, "OK: min_pkt_size=%u",
928                         pkt_dev->min_pkt_size);
929                 return count;
930         }
931 
932         if (!strcmp(name, "max_pkt_size")) {
933                 len = num_arg(&user_buffer[i], 10, &value);
934                 if (len < 0)
935                         return len;
936 
937                 i += len;
938                 if (value < 14 + 20 + 8)
939                         value = 14 + 20 + 8;
940                 if (value != pkt_dev->max_pkt_size) {
941                         pkt_dev->max_pkt_size = value;
942                         pkt_dev->cur_pkt_size = value;
943                 }
944                 sprintf(pg_result, "OK: max_pkt_size=%u",
945                         pkt_dev->max_pkt_size);
946                 return count;
947         }
948 
949         /* Shortcut for min = max */
950 
951         if (!strcmp(name, "pkt_size")) {
952                 len = num_arg(&user_buffer[i], 10, &value);
953                 if (len < 0)
954                         return len;
955 
956                 i += len;
957                 if (value < 14 + 20 + 8)
958                         value = 14 + 20 + 8;
959                 if (value != pkt_dev->min_pkt_size) {
960                         pkt_dev->min_pkt_size = value;
961                         pkt_dev->max_pkt_size = value;
962                         pkt_dev->cur_pkt_size = value;
963                 }
964                 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
965                 return count;
966         }
967 
968         if (!strcmp(name, "debug")) {
969                 len = num_arg(&user_buffer[i], 10, &value);
970                 if (len < 0)
971                         return len;
972 
973                 i += len;
974                 debug = value;
975                 sprintf(pg_result, "OK: debug=%u", debug);
976                 return count;
977         }
978 
979         if (!strcmp(name, "frags")) {
980                 len = num_arg(&user_buffer[i], 10, &value);
981                 if (len < 0)
982                         return len;
983 
984                 i += len;
985                 pkt_dev->nfrags = value;
986                 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
987                 return count;
988         }
989         if (!strcmp(name, "delay")) {
990                 len = num_arg(&user_buffer[i], 10, &value);
991                 if (len < 0)
992                         return len;
993 
994                 i += len;
995                 if (value == 0x7FFFFFFF)
996                         pkt_dev->delay = ULLONG_MAX;
997                 else
998                         pkt_dev->delay = (u64)value;
999 
1000                 sprintf(pg_result, "OK: delay=%llu",
1001                         (unsigned long long) pkt_dev->delay);
1002                 return count;
1003         }
1004         if (!strcmp(name, "rate")) {
1005                 len = num_arg(&user_buffer[i], 10, &value);
1006                 if (len < 0)
1007                         return len;
1008 
1009                 i += len;
1010                 if (!value)
1011                         return len;
1012                 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1013                 if (debug)
1014                         pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1015 
1016                 sprintf(pg_result, "OK: rate=%lu", value);
1017                 return count;
1018         }
1019         if (!strcmp(name, "ratep")) {
1020                 len = num_arg(&user_buffer[i], 10, &value);
1021                 if (len < 0)
1022                         return len;
1023 
1024                 i += len;
1025                 if (!value)
1026                         return len;
1027                 pkt_dev->delay = NSEC_PER_SEC/value;
1028                 if (debug)
1029                         pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1030 
1031                 sprintf(pg_result, "OK: rate=%lu", value);
1032                 return count;
1033         }
1034         if (!strcmp(name, "udp_src_min")) {
1035                 len = num_arg(&user_buffer[i], 10, &value);
1036                 if (len < 0)
1037                         return len;
1038 
1039                 i += len;
1040                 if (value != pkt_dev->udp_src_min) {
1041                         pkt_dev->udp_src_min = value;
1042                         pkt_dev->cur_udp_src = value;
1043                 }
1044                 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1045                 return count;
1046         }
1047         if (!strcmp(name, "udp_dst_min")) {
1048                 len = num_arg(&user_buffer[i], 10, &value);
1049                 if (len < 0)
1050                         return len;
1051 
1052                 i += len;
1053                 if (value != pkt_dev->udp_dst_min) {
1054                         pkt_dev->udp_dst_min = value;
1055                         pkt_dev->cur_udp_dst = value;
1056                 }
1057                 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1058                 return count;
1059         }
1060         if (!strcmp(name, "udp_src_max")) {
1061                 len = num_arg(&user_buffer[i], 10, &value);
1062                 if (len < 0)
1063                         return len;
1064 
1065                 i += len;
1066                 if (value != pkt_dev->udp_src_max) {
1067                         pkt_dev->udp_src_max = value;
1068                         pkt_dev->cur_udp_src = value;
1069                 }
1070                 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1071                 return count;
1072         }
1073         if (!strcmp(name, "udp_dst_max")) {
1074                 len = num_arg(&user_buffer[i], 10, &value);
1075                 if (len < 0)
1076                         return len;
1077 
1078                 i += len;
1079                 if (value != pkt_dev->udp_dst_max) {
1080                         pkt_dev->udp_dst_max = value;
1081                         pkt_dev->cur_udp_dst = value;
1082                 }
1083                 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1084                 return count;
1085         }
1086         if (!strcmp(name, "clone_skb")) {
1087                 len = num_arg(&user_buffer[i], 10, &value);
1088                 if (len < 0)
1089                         return len;
1090                 if ((value > 0) &&
1091                     ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1092                      !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1093                         return -ENOTSUPP;
1094                 i += len;
1095                 pkt_dev->clone_skb = value;
1096 
1097                 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1098                 return count;
1099         }
1100         if (!strcmp(name, "count")) {
1101                 len = num_arg(&user_buffer[i], 10, &value);
1102                 if (len < 0)
1103                         return len;
1104 
1105                 i += len;
1106                 pkt_dev->count = value;
1107                 sprintf(pg_result, "OK: count=%llu",
1108                         (unsigned long long)pkt_dev->count);
1109                 return count;
1110         }
1111         if (!strcmp(name, "src_mac_count")) {
1112                 len = num_arg(&user_buffer[i], 10, &value);
1113                 if (len < 0)
1114                         return len;
1115 
1116                 i += len;
1117                 if (pkt_dev->src_mac_count != value) {
1118                         pkt_dev->src_mac_count = value;
1119                         pkt_dev->cur_src_mac_offset = 0;
1120                 }
1121                 sprintf(pg_result, "OK: src_mac_count=%d",
1122                         pkt_dev->src_mac_count);
1123                 return count;
1124         }
1125         if (!strcmp(name, "dst_mac_count")) {
1126                 len = num_arg(&user_buffer[i], 10, &value);
1127                 if (len < 0)
1128                         return len;
1129 
1130                 i += len;
1131                 if (pkt_dev->dst_mac_count != value) {
1132                         pkt_dev->dst_mac_count = value;
1133                         pkt_dev->cur_dst_mac_offset = 0;
1134                 }
1135                 sprintf(pg_result, "OK: dst_mac_count=%d",
1136                         pkt_dev->dst_mac_count);
1137                 return count;
1138         }
1139         if (!strcmp(name, "burst")) {
1140                 len = num_arg(&user_buffer[i], 10, &value);
1141                 if (len < 0)
1142                         return len;
1143 
1144                 i += len;
1145                 if ((value > 1) && (pkt_dev->xmit_mode == M_START_XMIT) &&
1146                     (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1147                         return -ENOTSUPP;
1148                 pkt_dev->burst = value < 1 ? 1 : value;
1149                 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1150                 return count;
1151         }
1152         if (!strcmp(name, "node")) {
1153                 len = num_arg(&user_buffer[i], 10, &value);
1154                 if (len < 0)
1155                         return len;
1156 
1157                 i += len;
1158 
1159                 if (node_possible(value)) {
1160                         pkt_dev->node = value;
1161                         sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1162                         if (pkt_dev->page) {
1163                                 put_page(pkt_dev->page);
1164                                 pkt_dev->page = NULL;
1165                         }
1166                 }
1167                 else
1168                         sprintf(pg_result, "ERROR: node not possible");
1169                 return count;
1170         }
1171         if (!strcmp(name, "xmit_mode")) {
1172                 char f[32];
1173 
1174                 memset(f, 0, 32);
1175                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1176                 if (len < 0)
1177                         return len;
1178 
1179                 if (copy_from_user(f, &user_buffer[i], len))
1180                         return -EFAULT;
1181                 i += len;
1182 
1183                 if (strcmp(f, "start_xmit") == 0) {
1184                         pkt_dev->xmit_mode = M_START_XMIT;
1185                 } else if (strcmp(f, "netif_receive") == 0) {
1186                         /* clone_skb set earlier, not supported in this mode */
1187                         if (pkt_dev->clone_skb > 0)
1188                                 return -ENOTSUPP;
1189 
1190                         pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1191 
1192                         /* make sure new packet is allocated every time
1193                          * pktgen_xmit() is called
1194                          */
1195                         pkt_dev->last_ok = 1;
1196 
1197                         /* override clone_skb if user passed default value
1198                          * at module loading time
1199                          */
1200                         pkt_dev->clone_skb = 0;
1201                 } else {
1202                         sprintf(pg_result,
1203                                 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1204                                 f, "start_xmit, netif_receive\n");
1205                         return count;
1206                 }
1207                 sprintf(pg_result, "OK: xmit_mode=%s", f);
1208                 return count;
1209         }
1210         if (!strcmp(name, "flag")) {
1211                 char f[32];
1212                 memset(f, 0, 32);
1213                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1214                 if (len < 0)
1215                         return len;
1216 
1217                 if (copy_from_user(f, &user_buffer[i], len))
1218                         return -EFAULT;
1219                 i += len;
1220                 if (strcmp(f, "IPSRC_RND") == 0)
1221                         pkt_dev->flags |= F_IPSRC_RND;
1222 
1223                 else if (strcmp(f, "!IPSRC_RND") == 0)
1224                         pkt_dev->flags &= ~F_IPSRC_RND;
1225 
1226                 else if (strcmp(f, "TXSIZE_RND") == 0)
1227                         pkt_dev->flags |= F_TXSIZE_RND;
1228 
1229                 else if (strcmp(f, "!TXSIZE_RND") == 0)
1230                         pkt_dev->flags &= ~F_TXSIZE_RND;
1231 
1232                 else if (strcmp(f, "IPDST_RND") == 0)
1233                         pkt_dev->flags |= F_IPDST_RND;
1234 
1235                 else if (strcmp(f, "!IPDST_RND") == 0)
1236                         pkt_dev->flags &= ~F_IPDST_RND;
1237 
1238                 else if (strcmp(f, "UDPSRC_RND") == 0)
1239                         pkt_dev->flags |= F_UDPSRC_RND;
1240 
1241                 else if (strcmp(f, "!UDPSRC_RND") == 0)
1242                         pkt_dev->flags &= ~F_UDPSRC_RND;
1243 
1244                 else if (strcmp(f, "UDPDST_RND") == 0)
1245                         pkt_dev->flags |= F_UDPDST_RND;
1246 
1247                 else if (strcmp(f, "!UDPDST_RND") == 0)
1248                         pkt_dev->flags &= ~F_UDPDST_RND;
1249 
1250                 else if (strcmp(f, "MACSRC_RND") == 0)
1251                         pkt_dev->flags |= F_MACSRC_RND;
1252 
1253                 else if (strcmp(f, "!MACSRC_RND") == 0)
1254                         pkt_dev->flags &= ~F_MACSRC_RND;
1255 
1256                 else if (strcmp(f, "MACDST_RND") == 0)
1257                         pkt_dev->flags |= F_MACDST_RND;
1258 
1259                 else if (strcmp(f, "!MACDST_RND") == 0)
1260                         pkt_dev->flags &= ~F_MACDST_RND;
1261 
1262                 else if (strcmp(f, "MPLS_RND") == 0)
1263                         pkt_dev->flags |= F_MPLS_RND;
1264 
1265                 else if (strcmp(f, "!MPLS_RND") == 0)
1266                         pkt_dev->flags &= ~F_MPLS_RND;
1267 
1268                 else if (strcmp(f, "VID_RND") == 0)
1269                         pkt_dev->flags |= F_VID_RND;
1270 
1271                 else if (strcmp(f, "!VID_RND") == 0)
1272                         pkt_dev->flags &= ~F_VID_RND;
1273 
1274                 else if (strcmp(f, "SVID_RND") == 0)
1275                         pkt_dev->flags |= F_SVID_RND;
1276 
1277                 else if (strcmp(f, "!SVID_RND") == 0)
1278                         pkt_dev->flags &= ~F_SVID_RND;
1279 
1280                 else if (strcmp(f, "FLOW_SEQ") == 0)
1281                         pkt_dev->flags |= F_FLOW_SEQ;
1282 
1283                 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1284                         pkt_dev->flags |= F_QUEUE_MAP_RND;
1285 
1286                 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1287                         pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1288 
1289                 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1290                         pkt_dev->flags |= F_QUEUE_MAP_CPU;
1291 
1292                 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1293                         pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1294 #ifdef CONFIG_XFRM
1295                 else if (strcmp(f, "IPSEC") == 0)
1296                         pkt_dev->flags |= F_IPSEC_ON;
1297 #endif
1298 
1299                 else if (strcmp(f, "!IPV6") == 0)
1300                         pkt_dev->flags &= ~F_IPV6;
1301 
1302                 else if (strcmp(f, "NODE_ALLOC") == 0)
1303                         pkt_dev->flags |= F_NODE;
1304 
1305                 else if (strcmp(f, "!NODE_ALLOC") == 0)
1306                         pkt_dev->flags &= ~F_NODE;
1307 
1308                 else if (strcmp(f, "UDPCSUM") == 0)
1309                         pkt_dev->flags |= F_UDPCSUM;
1310 
1311                 else if (strcmp(f, "!UDPCSUM") == 0)
1312                         pkt_dev->flags &= ~F_UDPCSUM;
1313 
1314                 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1315                         pkt_dev->flags |= F_NO_TIMESTAMP;
1316 
1317                 else if (strcmp(f, "!NO_TIMESTAMP") == 0)
1318                         pkt_dev->flags &= ~F_NO_TIMESTAMP;
1319 
1320                 else {
1321                         sprintf(pg_result,
1322                                 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1323                                 f,
1324                                 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1325                                 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1326                                 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1327                                 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1328                                 "NO_TIMESTAMP, "
1329 #ifdef CONFIG_XFRM
1330                                 "IPSEC, "
1331 #endif
1332                                 "NODE_ALLOC\n");
1333                         return count;
1334                 }
1335                 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1336                 return count;
1337         }
1338         if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1339                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1340                 if (len < 0)
1341                         return len;
1342 
1343                 if (copy_from_user(buf, &user_buffer[i], len))
1344                         return -EFAULT;
1345                 buf[len] = 0;
1346                 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1347                         memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1348                         strncpy(pkt_dev->dst_min, buf, len);
1349                         pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1350                         pkt_dev->cur_daddr = pkt_dev->daddr_min;
1351                 }
1352                 if (debug)
1353                         pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1354                 i += len;
1355                 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1356                 return count;
1357         }
1358         if (!strcmp(name, "dst_max")) {
1359                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1360                 if (len < 0)
1361                         return len;
1362 
1363 
1364                 if (copy_from_user(buf, &user_buffer[i], len))
1365                         return -EFAULT;
1366 
1367                 buf[len] = 0;
1368                 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1369                         memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1370                         strncpy(pkt_dev->dst_max, buf, len);
1371                         pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1372                         pkt_dev->cur_daddr = pkt_dev->daddr_max;
1373                 }
1374                 if (debug)
1375                         pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1376                 i += len;
1377                 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1378                 return count;
1379         }
1380         if (!strcmp(name, "dst6")) {
1381                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1382                 if (len < 0)
1383                         return len;
1384 
1385                 pkt_dev->flags |= F_IPV6;
1386 
1387                 if (copy_from_user(buf, &user_buffer[i], len))
1388                         return -EFAULT;
1389                 buf[len] = 0;
1390 
1391                 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1392                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1393 
1394                 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1395 
1396                 if (debug)
1397                         pr_debug("dst6 set to: %s\n", buf);
1398 
1399                 i += len;
1400                 sprintf(pg_result, "OK: dst6=%s", buf);
1401                 return count;
1402         }
1403         if (!strcmp(name, "dst6_min")) {
1404                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1405                 if (len < 0)
1406                         return len;
1407 
1408                 pkt_dev->flags |= F_IPV6;
1409 
1410                 if (copy_from_user(buf, &user_buffer[i], len))
1411                         return -EFAULT;
1412                 buf[len] = 0;
1413 
1414                 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1415                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1416 
1417                 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1418                 if (debug)
1419                         pr_debug("dst6_min set to: %s\n", buf);
1420 
1421                 i += len;
1422                 sprintf(pg_result, "OK: dst6_min=%s", buf);
1423                 return count;
1424         }
1425         if (!strcmp(name, "dst6_max")) {
1426                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1427                 if (len < 0)
1428                         return len;
1429 
1430                 pkt_dev->flags |= F_IPV6;
1431 
1432                 if (copy_from_user(buf, &user_buffer[i], len))
1433                         return -EFAULT;
1434                 buf[len] = 0;
1435 
1436                 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1437                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1438 
1439                 if (debug)
1440                         pr_debug("dst6_max set to: %s\n", buf);
1441 
1442                 i += len;
1443                 sprintf(pg_result, "OK: dst6_max=%s", buf);
1444                 return count;
1445         }
1446         if (!strcmp(name, "src6")) {
1447                 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1448                 if (len < 0)
1449                         return len;
1450 
1451                 pkt_dev->flags |= F_IPV6;
1452 
1453                 if (copy_from_user(buf, &user_buffer[i], len))
1454                         return -EFAULT;
1455                 buf[len] = 0;
1456 
1457                 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1458                 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1459 
1460                 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1461 
1462                 if (debug)
1463                         pr_debug("src6 set to: %s\n", buf);
1464 
1465                 i += len;
1466                 sprintf(pg_result, "OK: src6=%s", buf);
1467                 return count;
1468         }
1469         if (!strcmp(name, "src_min")) {
1470                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1471                 if (len < 0)
1472                         return len;
1473 
1474                 if (copy_from_user(buf, &user_buffer[i], len))
1475                         return -EFAULT;
1476                 buf[len] = 0;
1477                 if (strcmp(buf, pkt_dev->src_min) != 0) {
1478                         memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1479                         strncpy(pkt_dev->src_min, buf, len);
1480                         pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1481                         pkt_dev->cur_saddr = pkt_dev->saddr_min;
1482                 }
1483                 if (debug)
1484                         pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1485                 i += len;
1486                 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1487                 return count;
1488         }
1489         if (!strcmp(name, "src_max")) {
1490                 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1491                 if (len < 0)
1492                         return len;
1493 
1494                 if (copy_from_user(buf, &user_buffer[i], len))
1495                         return -EFAULT;
1496                 buf[len] = 0;
1497                 if (strcmp(buf, pkt_dev->src_max) != 0) {
1498                         memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1499                         strncpy(pkt_dev->src_max, buf, len);
1500                         pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1501                         pkt_dev->cur_saddr = pkt_dev->saddr_max;
1502                 }
1503                 if (debug)
1504                         pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1505                 i += len;
1506                 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1507                 return count;
1508         }
1509         if (!strcmp(name, "dst_mac")) {
1510                 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1511                 if (len < 0)
1512                         return len;
1513 
1514                 memset(valstr, 0, sizeof(valstr));
1515                 if (copy_from_user(valstr, &user_buffer[i], len))
1516                         return -EFAULT;
1517 
1518                 if (!mac_pton(valstr, pkt_dev->dst_mac))
1519                         return -EINVAL;
1520                 /* Set up Dest MAC */
1521                 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1522 
1523                 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1524                 return count;
1525         }
1526         if (!strcmp(name, "src_mac")) {
1527                 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1528                 if (len < 0)
1529                         return len;
1530 
1531                 memset(valstr, 0, sizeof(valstr));
1532                 if (copy_from_user(valstr, &user_buffer[i], len))
1533                         return -EFAULT;
1534 
1535                 if (!mac_pton(valstr, pkt_dev->src_mac))
1536                         return -EINVAL;
1537                 /* Set up Src MAC */
1538                 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1539 
1540                 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1541                 return count;
1542         }
1543 
1544         if (!strcmp(name, "clear_counters")) {
1545                 pktgen_clear_counters(pkt_dev);
1546                 sprintf(pg_result, "OK: Clearing counters.\n");
1547                 return count;
1548         }
1549 
1550         if (!strcmp(name, "flows")) {
1551                 len = num_arg(&user_buffer[i], 10, &value);
1552                 if (len < 0)
1553                         return len;
1554 
1555                 i += len;
1556                 if (value > MAX_CFLOWS)
1557                         value = MAX_CFLOWS;
1558 
1559                 pkt_dev->cflows = value;
1560                 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1561                 return count;
1562         }
1563 #ifdef CONFIG_XFRM
1564         if (!strcmp(name, "spi")) {
1565                 len = num_arg(&user_buffer[i], 10, &value);
1566                 if (len < 0)
1567                         return len;
1568 
1569                 i += len;
1570                 pkt_dev->spi = value;
1571                 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1572                 return count;
1573         }
1574 #endif
1575         if (!strcmp(name, "flowlen")) {
1576                 len = num_arg(&user_buffer[i], 10, &value);
1577                 if (len < 0)
1578                         return len;
1579 
1580                 i += len;
1581                 pkt_dev->lflow = value;
1582                 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1583                 return count;
1584         }
1585 
1586         if (!strcmp(name, "queue_map_min")) {
1587                 len = num_arg(&user_buffer[i], 5, &value);
1588                 if (len < 0)
1589                         return len;
1590 
1591                 i += len;
1592                 pkt_dev->queue_map_min = value;
1593                 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1594                 return count;
1595         }
1596 
1597         if (!strcmp(name, "queue_map_max")) {
1598                 len = num_arg(&user_buffer[i], 5, &value);
1599                 if (len < 0)
1600                         return len;
1601 
1602                 i += len;
1603                 pkt_dev->queue_map_max = value;
1604                 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1605                 return count;
1606         }
1607 
1608         if (!strcmp(name, "mpls")) {
1609                 unsigned int n, cnt;
1610 
1611                 len = get_labels(&user_buffer[i], pkt_dev);
1612                 if (len < 0)
1613                         return len;
1614                 i += len;
1615                 cnt = sprintf(pg_result, "OK: mpls=");
1616                 for (n = 0; n < pkt_dev->nr_labels; n++)
1617                         cnt += sprintf(pg_result + cnt,
1618                                        "%08x%s", ntohl(pkt_dev->labels[n]),
1619                                        n == pkt_dev->nr_labels-1 ? "" : ",");
1620 
1621                 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1622                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1623                         pkt_dev->svlan_id = 0xffff;
1624 
1625                         if (debug)
1626                                 pr_debug("VLAN/SVLAN auto turned off\n");
1627                 }
1628                 return count;
1629         }
1630 
1631         if (!strcmp(name, "vlan_id")) {
1632                 len = num_arg(&user_buffer[i], 4, &value);
1633                 if (len < 0)
1634                         return len;
1635 
1636                 i += len;
1637                 if (value <= 4095) {
1638                         pkt_dev->vlan_id = value;  /* turn on VLAN */
1639 
1640                         if (debug)
1641                                 pr_debug("VLAN turned on\n");
1642 
1643                         if (debug && pkt_dev->nr_labels)
1644                                 pr_debug("MPLS auto turned off\n");
1645 
1646                         pkt_dev->nr_labels = 0;    /* turn off MPLS */
1647                         sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1648                 } else {
1649                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1650                         pkt_dev->svlan_id = 0xffff;
1651 
1652                         if (debug)
1653                                 pr_debug("VLAN/SVLAN turned off\n");
1654                 }
1655                 return count;
1656         }
1657 
1658         if (!strcmp(name, "vlan_p")) {
1659                 len = num_arg(&user_buffer[i], 1, &value);
1660                 if (len < 0)
1661                         return len;
1662 
1663                 i += len;
1664                 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1665                         pkt_dev->vlan_p = value;
1666                         sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1667                 } else {
1668                         sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1669                 }
1670                 return count;
1671         }
1672 
1673         if (!strcmp(name, "vlan_cfi")) {
1674                 len = num_arg(&user_buffer[i], 1, &value);
1675                 if (len < 0)
1676                         return len;
1677 
1678                 i += len;
1679                 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1680                         pkt_dev->vlan_cfi = value;
1681                         sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1682                 } else {
1683                         sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1684                 }
1685                 return count;
1686         }
1687 
1688         if (!strcmp(name, "svlan_id")) {
1689                 len = num_arg(&user_buffer[i], 4, &value);
1690                 if (len < 0)
1691                         return len;
1692 
1693                 i += len;
1694                 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1695                         pkt_dev->svlan_id = value;  /* turn on SVLAN */
1696 
1697                         if (debug)
1698                                 pr_debug("SVLAN turned on\n");
1699 
1700                         if (debug && pkt_dev->nr_labels)
1701                                 pr_debug("MPLS auto turned off\n");
1702 
1703                         pkt_dev->nr_labels = 0;    /* turn off MPLS */
1704                         sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1705                 } else {
1706                         pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1707                         pkt_dev->svlan_id = 0xffff;
1708 
1709                         if (debug)
1710                                 pr_debug("VLAN/SVLAN turned off\n");
1711                 }
1712                 return count;
1713         }
1714 
1715         if (!strcmp(name, "svlan_p")) {
1716                 len = num_arg(&user_buffer[i], 1, &value);
1717                 if (len < 0)
1718                         return len;
1719 
1720                 i += len;
1721                 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1722                         pkt_dev->svlan_p = value;
1723                         sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1724                 } else {
1725                         sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1726                 }
1727                 return count;
1728         }
1729 
1730         if (!strcmp(name, "svlan_cfi")) {
1731                 len = num_arg(&user_buffer[i], 1, &value);
1732                 if (len < 0)
1733                         return len;
1734 
1735                 i += len;
1736                 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1737                         pkt_dev->svlan_cfi = value;
1738                         sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1739                 } else {
1740                         sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1741                 }
1742                 return count;
1743         }
1744 
1745         if (!strcmp(name, "tos")) {
1746                 __u32 tmp_value = 0;
1747                 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1748                 if (len < 0)
1749                         return len;
1750 
1751                 i += len;
1752                 if (len == 2) {
1753                         pkt_dev->tos = tmp_value;
1754                         sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1755                 } else {
1756                         sprintf(pg_result, "ERROR: tos must be 00-ff");
1757                 }
1758                 return count;
1759         }
1760 
1761         if (!strcmp(name, "traffic_class")) {
1762                 __u32 tmp_value = 0;
1763                 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1764                 if (len < 0)
1765                         return len;
1766 
1767                 i += len;
1768                 if (len == 2) {
1769                         pkt_dev->traffic_class = tmp_value;
1770                         sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1771                 } else {
1772                         sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1773                 }
1774                 return count;
1775         }
1776 
1777         if (!strcmp(name, "skb_priority")) {
1778                 len = num_arg(&user_buffer[i], 9, &value);
1779                 if (len < 0)
1780                         return len;
1781 
1782                 i += len;
1783                 pkt_dev->skb_priority = value;
1784                 sprintf(pg_result, "OK: skb_priority=%i",
1785                         pkt_dev->skb_priority);
1786                 return count;
1787         }
1788 
1789         sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1790         return -EINVAL;
1791 }
1792 
1793 static int pktgen_if_open(struct inode *inode, struct file *file)
1794 {
1795         return single_open(file, pktgen_if_show, PDE_DATA(inode));
1796 }
1797 
1798 static const struct file_operations pktgen_if_fops = {
1799         .owner   = THIS_MODULE,
1800         .open    = pktgen_if_open,
1801         .read    = seq_read,
1802         .llseek  = seq_lseek,
1803         .write   = pktgen_if_write,
1804         .release = single_release,
1805 };
1806 
1807 static int pktgen_thread_show(struct seq_file *seq, void *v)
1808 {
1809         struct pktgen_thread *t = seq->private;
1810         const struct pktgen_dev *pkt_dev;
1811 
1812         BUG_ON(!t);
1813 
1814         seq_puts(seq, "Running: ");
1815 
1816         rcu_read_lock();
1817         list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1818                 if (pkt_dev->running)
1819                         seq_printf(seq, "%s ", pkt_dev->odevname);
1820 
1821         seq_puts(seq, "\nStopped: ");
1822 
1823         list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1824                 if (!pkt_dev->running)
1825                         seq_printf(seq, "%s ", pkt_dev->odevname);
1826 
1827         if (t->result[0])
1828                 seq_printf(seq, "\nResult: %s\n", t->result);
1829         else
1830                 seq_puts(seq, "\nResult: NA\n");
1831 
1832         rcu_read_unlock();
1833 
1834         return 0;
1835 }
1836 
1837 static ssize_t pktgen_thread_write(struct file *file,
1838                                    const char __user * user_buffer,
1839                                    size_t count, loff_t * offset)
1840 {
1841         struct seq_file *seq = file->private_data;
1842         struct pktgen_thread *t = seq->private;
1843         int i, max, len, ret;
1844         char name[40];
1845         char *pg_result;
1846 
1847         if (count < 1) {
1848                 //      sprintf(pg_result, "Wrong command format");
1849                 return -EINVAL;
1850         }
1851 
1852         max = count;
1853         len = count_trail_chars(user_buffer, max);
1854         if (len < 0)
1855                 return len;
1856 
1857         i = len;
1858 
1859         /* Read variable name */
1860 
1861         len = strn_len(&user_buffer[i], sizeof(name) - 1);
1862         if (len < 0)
1863                 return len;
1864 
1865         memset(name, 0, sizeof(name));
1866         if (copy_from_user(name, &user_buffer[i], len))
1867                 return -EFAULT;
1868         i += len;
1869 
1870         max = count - i;
1871         len = count_trail_chars(&user_buffer[i], max);
1872         if (len < 0)
1873                 return len;
1874 
1875         i += len;
1876 
1877         if (debug)
1878                 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1879 
1880         if (!t) {
1881                 pr_err("ERROR: No thread\n");
1882                 ret = -EINVAL;
1883                 goto out;
1884         }
1885 
1886         pg_result = &(t->result[0]);
1887 
1888         if (!strcmp(name, "add_device")) {
1889                 char f[32];
1890                 memset(f, 0, 32);
1891                 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1892                 if (len < 0) {
1893                         ret = len;
1894                         goto out;
1895                 }
1896                 if (copy_from_user(f, &user_buffer[i], len))
1897                         return -EFAULT;
1898                 i += len;
1899                 mutex_lock(&pktgen_thread_lock);
1900                 ret = pktgen_add_device(t, f);
1901                 mutex_unlock(&pktgen_thread_lock);
1902                 if (!ret) {
1903                         ret = count;
1904                         sprintf(pg_result, "OK: add_device=%s", f);
1905                 } else
1906                         sprintf(pg_result, "ERROR: can not add device %s", f);
1907                 goto out;
1908         }
1909 
1910         if (!strcmp(name, "rem_device_all")) {
1911                 mutex_lock(&pktgen_thread_lock);
1912                 t->control |= T_REMDEVALL;
1913                 mutex_unlock(&pktgen_thread_lock);
1914                 schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
1915                 ret = count;
1916                 sprintf(pg_result, "OK: rem_device_all");
1917                 goto out;
1918         }
1919 
1920         if (!strcmp(name, "max_before_softirq")) {
1921                 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1922                 ret = count;
1923                 goto out;
1924         }
1925 
1926         ret = -EINVAL;
1927 out:
1928         return ret;
1929 }
1930 
1931 static int pktgen_thread_open(struct inode *inode, struct file *file)
1932 {
1933         return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1934 }
1935 
1936 static const struct file_operations pktgen_thread_fops = {
1937         .owner   = THIS_MODULE,
1938         .open    = pktgen_thread_open,
1939         .read    = seq_read,
1940         .llseek  = seq_lseek,
1941         .write   = pktgen_thread_write,
1942         .release = single_release,
1943 };
1944 
1945 /* Think find or remove for NN */
1946 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1947                                               const char *ifname, int remove)
1948 {
1949         struct pktgen_thread *t;
1950         struct pktgen_dev *pkt_dev = NULL;
1951         bool exact = (remove == FIND);
1952 
1953         list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1954                 pkt_dev = pktgen_find_dev(t, ifname, exact);
1955                 if (pkt_dev) {
1956                         if (remove) {
1957                                 pkt_dev->removal_mark = 1;
1958                                 t->control |= T_REMDEV;
1959                         }
1960                         break;
1961                 }
1962         }
1963         return pkt_dev;
1964 }
1965 
1966 /*
1967  * mark a device for removal
1968  */
1969 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1970 {
1971         struct pktgen_dev *pkt_dev = NULL;
1972         const int max_tries = 10, msec_per_try = 125;
1973         int i = 0;
1974 
1975         mutex_lock(&pktgen_thread_lock);
1976         pr_debug("%s: marking %s for removal\n", __func__, ifname);
1977 
1978         while (1) {
1979 
1980                 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1981                 if (pkt_dev == NULL)
1982                         break;  /* success */
1983 
1984                 mutex_unlock(&pktgen_thread_lock);
1985                 pr_debug("%s: waiting for %s to disappear....\n",
1986                          __func__, ifname);
1987                 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1988                 mutex_lock(&pktgen_thread_lock);
1989 
1990                 if (++i >= max_tries) {
1991                         pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1992                                __func__, msec_per_try * i, ifname);
1993                         break;
1994                 }
1995 
1996         }
1997 
1998         mutex_unlock(&pktgen_thread_lock);
1999 }
2000 
2001 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
2002 {
2003         struct pktgen_thread *t;
2004 
2005         list_for_each_entry(t, &pn->pktgen_threads, th_list) {
2006                 struct pktgen_dev *pkt_dev;
2007 
2008                 rcu_read_lock();
2009                 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
2010                         if (pkt_dev->odev != dev)
2011                                 continue;
2012 
2013                         proc_remove(pkt_dev->entry);
2014 
2015                         pkt_dev->entry = proc_create_data(dev->name, 0600,
2016                                                           pn->proc_dir,
2017                                                           &pktgen_if_fops,
2018                                                           pkt_dev);
2019                         if (!pkt_dev->entry)
2020                                 pr_err("can't move proc entry for '%s'\n",
2021                                        dev->name);
2022                         break;
2023                 }
2024                 rcu_read_unlock();
2025         }
2026 }
2027 
2028 static int pktgen_device_event(struct notifier_block *unused,
2029                                unsigned long event, void *ptr)
2030 {
2031         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2032         struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
2033 
2034         if (pn->pktgen_exiting)
2035                 return NOTIFY_DONE;
2036 
2037         /* It is OK that we do not hold the group lock right now,
2038          * as we run under the RTNL lock.
2039          */
2040 
2041         switch (event) {
2042         case NETDEV_CHANGENAME:
2043                 pktgen_change_name(pn, dev);
2044                 break;
2045 
2046         case NETDEV_UNREGISTER:
2047                 pktgen_mark_device(pn, dev->name);
2048                 break;
2049         }
2050 
2051         return NOTIFY_DONE;
2052 }
2053 
2054 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2055                                                  struct pktgen_dev *pkt_dev,
2056                                                  const char *ifname)
2057 {
2058         char b[IFNAMSIZ+5];
2059         int i;
2060 
2061         for (i = 0; ifname[i] != '@'; i++) {
2062                 if (i == IFNAMSIZ)
2063                         break;
2064 
2065                 b[i] = ifname[i];
2066         }
2067         b[i] = 0;
2068 
2069         return dev_get_by_name(pn->net, b);
2070 }
2071 
2072 
2073 /* Associate pktgen_dev with a device. */
2074 
2075 static int pktgen_setup_dev(const struct pktgen_net *pn,
2076                             struct pktgen_dev *pkt_dev, const char *ifname)
2077 {
2078         struct net_device *odev;
2079         int err;
2080 
2081         /* Clean old setups */
2082         if (pkt_dev->odev) {
2083                 dev_put(pkt_dev->odev);
2084                 pkt_dev->odev = NULL;
2085         }
2086 
2087         odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2088         if (!odev) {
2089                 pr_err("no such netdevice: \"%s\"\n", ifname);
2090                 return -ENODEV;
2091         }
2092 
2093         if (odev->type != ARPHRD_ETHER) {
2094                 pr_err("not an ethernet device: \"%s\"\n", ifname);
2095                 err = -EINVAL;
2096         } else if (!netif_running(odev)) {
2097                 pr_err("device is down: \"%s\"\n", ifname);
2098                 err = -ENETDOWN;
2099         } else {
2100                 pkt_dev->odev = odev;
2101                 return 0;
2102         }
2103 
2104         dev_put(odev);
2105         return err;
2106 }
2107 
2108 /* Read pkt_dev from the interface and set up internal pktgen_dev
2109  * structure to have the right information to create/send packets
2110  */
2111 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2112 {
2113         int ntxq;
2114 
2115         if (!pkt_dev->odev) {
2116                 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2117                 sprintf(pkt_dev->result,
2118                         "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2119                 return;
2120         }
2121 
2122         /* make sure that we don't pick a non-existing transmit queue */
2123         ntxq = pkt_dev->odev->real_num_tx_queues;
2124 
2125         if (ntxq <= pkt_dev->queue_map_min) {
2126                 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2127                         pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2128                         pkt_dev->odevname);
2129                 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2130         }
2131         if (pkt_dev->queue_map_max >= ntxq) {
2132                 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2133                         pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2134                         pkt_dev->odevname);
2135                 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2136         }
2137 
2138         /* Default to the interface's mac if not explicitly set. */
2139 
2140         if (is_zero_ether_addr(pkt_dev->src_mac))
2141                 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2142 
2143         /* Set up Dest MAC */
2144         ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2145 
2146         if (pkt_dev->flags & F_IPV6) {
2147                 int i, set = 0, err = 1;
2148                 struct inet6_dev *idev;
2149 
2150                 if (pkt_dev->min_pkt_size == 0) {
2151                         pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2152                                                 + sizeof(struct udphdr)
2153                                                 + sizeof(struct pktgen_hdr)
2154                                                 + pkt_dev->pkt_overhead;
2155                 }
2156 
2157                 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2158                         if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2159                                 set = 1;
2160                                 break;
2161                         }
2162 
2163                 if (!set) {
2164 
2165                         /*
2166                          * Use linklevel address if unconfigured.
2167                          *
2168                          * use ipv6_get_lladdr if/when it's get exported
2169                          */
2170 
2171                         rcu_read_lock();
2172                         idev = __in6_dev_get(pkt_dev->odev);
2173                         if (idev) {
2174                                 struct inet6_ifaddr *ifp;
2175 
2176                                 read_lock_bh(&idev->lock);
2177                                 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2178                                         if ((ifp->scope & IFA_LINK) &&
2179                                             !(ifp->flags & IFA_F_TENTATIVE)) {
2180                                                 pkt_dev->cur_in6_saddr = ifp->addr;
2181                                                 err = 0;
2182                                                 break;
2183                                         }
2184                                 }
2185                                 read_unlock_bh(&idev->lock);
2186                         }
2187                         rcu_read_unlock();
2188                         if (err)
2189                                 pr_err("ERROR: IPv6 link address not available\n");
2190                 }
2191         } else {
2192                 if (pkt_dev->min_pkt_size == 0) {
2193                         pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2194                                                 + sizeof(struct udphdr)
2195                                                 + sizeof(struct pktgen_hdr)
2196                                                 + pkt_dev->pkt_overhead;
2197                 }
2198 
2199                 pkt_dev->saddr_min = 0;
2200                 pkt_dev->saddr_max = 0;
2201                 if (strlen(pkt_dev->src_min) == 0) {
2202 
2203                         struct in_device *in_dev;
2204 
2205                         rcu_read_lock();
2206                         in_dev = __in_dev_get_rcu(pkt_dev->odev);
2207                         if (in_dev) {
2208                                 if (in_dev->ifa_list) {
2209                                         pkt_dev->saddr_min =
2210                                             in_dev->ifa_list->ifa_address;
2211                                         pkt_dev->saddr_max = pkt_dev->saddr_min;
2212                                 }
2213                         }
2214                         rcu_read_unlock();
2215                 } else {
2216                         pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2217                         pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2218                 }
2219 
2220                 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2221                 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2222         }
2223         /* Initialize current values. */
2224         pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2225         if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2226                 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2227 
2228         pkt_dev->cur_dst_mac_offset = 0;
2229         pkt_dev->cur_src_mac_offset = 0;
2230         pkt_dev->cur_saddr = pkt_dev->saddr_min;
2231         pkt_dev->cur_daddr = pkt_dev->daddr_min;
2232         pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2233         pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2234         pkt_dev->nflows = 0;
2235 }
2236 
2237 
2238 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2239 {
2240         ktime_t start_time, end_time;
2241         s64 remaining;
2242         struct hrtimer_sleeper t;
2243 
2244         hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2245         hrtimer_set_expires(&t.timer, spin_until);
2246 
2247         remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2248         if (remaining <= 0) {
2249                 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2250                 return;
2251         }
2252 
2253         start_time = ktime_get();
2254         if (remaining < 100000) {
2255                 /* for small delays (<100us), just loop until limit is reached */
2256                 do {
2257                         end_time = ktime_get();
2258                 } while (ktime_compare(end_time, spin_until) < 0);
2259         } else {
2260                 /* see do_nanosleep */
2261                 hrtimer_init_sleeper(&t, current);
2262                 do {
2263                         set_current_state(TASK_INTERRUPTIBLE);
2264                         hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2265 
2266                         if (likely(t.task))
2267                                 schedule();
2268 
2269                         hrtimer_cancel(&t.timer);
2270                 } while (t.task && pkt_dev->running && !signal_pending(current));
2271                 __set_current_state(TASK_RUNNING);
2272                 end_time = ktime_get();
2273         }
2274 
2275         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2276         pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2277 }
2278 
2279 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2280 {
2281         pkt_dev->pkt_overhead = LL_RESERVED_SPACE(pkt_dev->odev);
2282         pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2283         pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2284         pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2285 }
2286 
2287 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2288 {
2289         return !!(pkt_dev->flows[flow].flags & F_INIT);
2290 }
2291 
2292 static inline int f_pick(struct pktgen_dev *pkt_dev)
2293 {
2294         int flow = pkt_dev->curfl;
2295 
2296         if (pkt_dev->flags & F_FLOW_SEQ) {
2297                 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2298                         /* reset time */
2299                         pkt_dev->flows[flow].count = 0;
2300                         pkt_dev->flows[flow].flags = 0;
2301                         pkt_dev->curfl += 1;
2302                         if (pkt_dev->curfl >= pkt_dev->cflows)
2303                                 pkt_dev->curfl = 0; /*reset */
2304                 }
2305         } else {
2306                 flow = prandom_u32() % pkt_dev->cflows;
2307                 pkt_dev->curfl = flow;
2308 
2309                 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2310                         pkt_dev->flows[flow].count = 0;
2311                         pkt_dev->flows[flow].flags = 0;
2312                 }
2313         }
2314 
2315         return pkt_dev->curfl;
2316 }
2317 
2318 
2319 #ifdef CONFIG_XFRM
2320 /* If there was already an IPSEC SA, we keep it as is, else
2321  * we go look for it ...
2322 */
2323 #define DUMMY_MARK 0
2324 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2325 {
2326         struct xfrm_state *x = pkt_dev->flows[flow].x;
2327         struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2328         if (!x) {
2329 
2330                 if (pkt_dev->spi) {
2331                         /* We need as quick as possible to find the right SA
2332                          * Searching with minimum criteria to archieve this.
2333                          */
2334                         x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2335                 } else {
2336                         /* slow path: we dont already have xfrm_state */
2337                         x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2338                                                 (xfrm_address_t *)&pkt_dev->cur_daddr,
2339                                                 (xfrm_address_t *)&pkt_dev->cur_saddr,
2340                                                 AF_INET,
2341                                                 pkt_dev->ipsmode,
2342                                                 pkt_dev->ipsproto, 0);
2343                 }
2344                 if (x) {
2345                         pkt_dev->flows[flow].x = x;
2346                         set_pkt_overhead(pkt_dev);
2347                         pkt_dev->pkt_overhead += x->props.header_len;
2348                 }
2349 
2350         }
2351 }
2352 #endif
2353 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2354 {
2355 
2356         if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2357                 pkt_dev->cur_queue_map = smp_processor_id();
2358 
2359         else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2360                 __u16 t;
2361                 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2362                         t = prandom_u32() %
2363                                 (pkt_dev->queue_map_max -
2364                                  pkt_dev->queue_map_min + 1)
2365                                 + pkt_dev->queue_map_min;
2366                 } else {
2367                         t = pkt_dev->cur_queue_map + 1;
2368                         if (t > pkt_dev->queue_map_max)
2369                                 t = pkt_dev->queue_map_min;
2370                 }
2371                 pkt_dev->cur_queue_map = t;
2372         }
2373         pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2374 }
2375 
2376 /* Increment/randomize headers according to flags and current values
2377  * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2378  */
2379 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2380 {
2381         __u32 imn;
2382         __u32 imx;
2383         int flow = 0;
2384 
2385         if (pkt_dev->cflows)
2386                 flow = f_pick(pkt_dev);
2387 
2388         /*  Deal with source MAC */
2389         if (pkt_dev->src_mac_count > 1) {
2390                 __u32 mc;
2391                 __u32 tmp;
2392 
2393                 if (pkt_dev->flags & F_MACSRC_RND)
2394                         mc = prandom_u32() % pkt_dev->src_mac_count;
2395                 else {
2396                         mc = pkt_dev->cur_src_mac_offset++;
2397                         if (pkt_dev->cur_src_mac_offset >=
2398                             pkt_dev->src_mac_count)
2399                                 pkt_dev->cur_src_mac_offset = 0;
2400                 }
2401 
2402                 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2403                 pkt_dev->hh[11] = tmp;
2404                 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2405                 pkt_dev->hh[10] = tmp;
2406                 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2407                 pkt_dev->hh[9] = tmp;
2408                 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2409                 pkt_dev->hh[8] = tmp;
2410                 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2411                 pkt_dev->hh[7] = tmp;
2412         }
2413 
2414         /*  Deal with Destination MAC */
2415         if (pkt_dev->dst_mac_count > 1) {
2416                 __u32 mc;
2417                 __u32 tmp;
2418 
2419                 if (pkt_dev->flags & F_MACDST_RND)
2420                         mc = prandom_u32() % pkt_dev->dst_mac_count;
2421 
2422                 else {
2423                         mc = pkt_dev->cur_dst_mac_offset++;
2424                         if (pkt_dev->cur_dst_mac_offset >=
2425                             pkt_dev->dst_mac_count) {
2426                                 pkt_dev->cur_dst_mac_offset = 0;
2427                         }
2428                 }
2429 
2430                 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2431                 pkt_dev->hh[5] = tmp;
2432                 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2433                 pkt_dev->hh[4] = tmp;
2434                 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2435                 pkt_dev->hh[3] = tmp;
2436                 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2437                 pkt_dev->hh[2] = tmp;
2438                 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2439                 pkt_dev->hh[1] = tmp;
2440         }
2441 
2442         if (pkt_dev->flags & F_MPLS_RND) {
2443                 unsigned int i;
2444                 for (i = 0; i < pkt_dev->nr_labels; i++)
2445                         if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2446                                 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2447                                              ((__force __be32)prandom_u32() &
2448                                                       htonl(0x000fffff));
2449         }
2450 
2451         if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2452                 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2453         }
2454 
2455         if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2456                 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2457         }
2458 
2459         if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2460                 if (pkt_dev->flags & F_UDPSRC_RND)
2461                         pkt_dev->cur_udp_src = prandom_u32() %
2462                                 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2463                                 + pkt_dev->udp_src_min;
2464 
2465                 else {
2466                         pkt_dev->cur_udp_src++;
2467                         if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2468                                 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2469                 }
2470         }
2471 
2472         if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2473                 if (pkt_dev->flags & F_UDPDST_RND) {
2474                         pkt_dev->cur_udp_dst = prandom_u32() %
2475                                 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2476                                 + pkt_dev->udp_dst_min;
2477                 } else {
2478                         pkt_dev->cur_udp_dst++;
2479                         if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2480                                 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2481                 }
2482         }
2483 
2484         if (!(pkt_dev->flags & F_IPV6)) {
2485 
2486                 imn = ntohl(pkt_dev->saddr_min);
2487                 imx = ntohl(pkt_dev->saddr_max);
2488                 if (imn < imx) {
2489                         __u32 t;
2490                         if (pkt_dev->flags & F_IPSRC_RND)
2491                                 t = prandom_u32() % (imx - imn) + imn;
2492                         else {
2493                                 t = ntohl(pkt_dev->cur_saddr);
2494                                 t++;
2495                                 if (t > imx)
2496                                         t = imn;
2497 
2498                         }
2499                         pkt_dev->cur_saddr = htonl(t);
2500                 }
2501 
2502                 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2503                         pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2504                 } else {
2505                         imn = ntohl(pkt_dev->daddr_min);
2506                         imx = ntohl(pkt_dev->daddr_max);
2507                         if (imn < imx) {
2508                                 __u32 t;
2509                                 __be32 s;
2510                                 if (pkt_dev->flags & F_IPDST_RND) {
2511 
2512                                         do {
2513                                                 t = prandom_u32() %
2514                                                         (imx - imn) + imn;
2515                                                 s = htonl(t);
2516                                         } while (ipv4_is_loopback(s) ||
2517                                                 ipv4_is_multicast(s) ||
2518                                                 ipv4_is_lbcast(s) ||
2519                                                 ipv4_is_zeronet(s) ||
2520                                                 ipv4_is_local_multicast(s));
2521                                         pkt_dev->cur_daddr = s;
2522                                 } else {
2523                                         t = ntohl(pkt_dev->cur_daddr);
2524                                         t++;
2525                                         if (t > imx) {
2526                                                 t = imn;
2527                                         }
2528                                         pkt_dev->cur_daddr = htonl(t);
2529                                 }
2530                         }
2531                         if (pkt_dev->cflows) {
2532                                 pkt_dev->flows[flow].flags |= F_INIT;
2533                                 pkt_dev->flows[flow].cur_daddr =
2534                                     pkt_dev->cur_daddr;
2535 #ifdef CONFIG_XFRM
2536                                 if (pkt_dev->flags & F_IPSEC_ON)
2537                                         get_ipsec_sa(pkt_dev, flow);
2538 #endif
2539                                 pkt_dev->nflows++;
2540                         }
2541                 }
2542         } else {                /* IPV6 * */
2543 
2544                 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2545                         int i;
2546 
2547                         /* Only random destinations yet */
2548 
2549                         for (i = 0; i < 4; i++) {
2550                                 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2551                                     (((__force __be32)prandom_u32() |
2552                                       pkt_dev->min_in6_daddr.s6_addr32[i]) &
2553                                      pkt_dev->max_in6_daddr.s6_addr32[i]);
2554                         }
2555                 }
2556         }
2557 
2558         if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2559                 __u32 t;
2560                 if (pkt_dev->flags & F_TXSIZE_RND) {
2561                         t = prandom_u32() %
2562                                 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2563                                 + pkt_dev->min_pkt_size;
2564                 } else {
2565                         t = pkt_dev->cur_pkt_size + 1;
2566                         if (t > pkt_dev->max_pkt_size)
2567                                 t = pkt_dev->min_pkt_size;
2568                 }
2569                 pkt_dev->cur_pkt_size = t;
2570         }
2571 
2572         set_cur_queue_map(pkt_dev);
2573 
2574         pkt_dev->flows[flow].count++;
2575 }
2576 
2577 
2578 #ifdef CONFIG_XFRM
2579 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2580 
2581         [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2582 };
2583 
2584 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2585 {
2586         struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2587         int err = 0;
2588         struct net *net = dev_net(pkt_dev->odev);
2589 
2590         if (!x)
2591                 return 0;
2592         /* XXX: we dont support tunnel mode for now until
2593          * we resolve the dst issue */
2594         if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2595                 return 0;
2596 
2597         /* But when user specify an valid SPI, transformation
2598          * supports both transport/tunnel mode + ESP/AH type.
2599          */
2600         if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2601                 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2602 
2603         rcu_read_lock_bh();
2604         err = x->outer_mode->output(x, skb);
2605         rcu_read_unlock_bh();
2606         if (err) {
2607                 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2608                 goto error;
2609         }
2610         err = x->type->output(x, skb);
2611         if (err) {
2612                 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2613                 goto error;
2614         }
2615         spin_lock_bh(&x->lock);
2616         x->curlft.bytes += skb->len;
2617         x->curlft.packets++;
2618         spin_unlock_bh(&x->lock);
2619 error:
2620         return err;
2621 }
2622 
2623 static void free_SAs(struct pktgen_dev *pkt_dev)
2624 {
2625         if (pkt_dev->cflows) {
2626                 /* let go of the SAs if we have them */
2627                 int i;
2628                 for (i = 0; i < pkt_dev->cflows; i++) {
2629                         struct xfrm_state *x = pkt_dev->flows[i].x;
2630                         if (x) {
2631                                 xfrm_state_put(x);
2632                                 pkt_dev->flows[i].x = NULL;
2633                         }
2634                 }
2635         }
2636 }
2637 
2638 static int process_ipsec(struct pktgen_dev *pkt_dev,
2639                               struct sk_buff *skb, __be16 protocol)
2640 {
2641         if (pkt_dev->flags & F_IPSEC_ON) {
2642                 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2643                 int nhead = 0;
2644                 if (x) {
2645                         struct ethhdr *eth;
2646                         struct iphdr *iph;
2647                         int ret;
2648 
2649                         nhead = x->props.header_len - skb_headroom(skb);
2650                         if (nhead > 0) {
2651                                 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2652                                 if (ret < 0) {
2653                                         pr_err("Error expanding ipsec packet %d\n",
2654                                                ret);
2655                                         goto err;
2656                                 }
2657                         }
2658 
2659                         /* ipsec is not expecting ll header */
2660                         skb_pull(skb, ETH_HLEN);
2661                         ret = pktgen_output_ipsec(skb, pkt_dev);
2662                         if (ret) {
2663                                 pr_err("Error creating ipsec packet %d\n", ret);
2664                                 goto err;
2665                         }
2666                         /* restore ll */
2667                         eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
2668                         memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2669                         eth->h_proto = protocol;
2670 
2671                         /* Update IPv4 header len as well as checksum value */
2672                         iph = ip_hdr(skb);
2673                         iph->tot_len = htons(skb->len - ETH_HLEN);
2674                         ip_send_check(iph);
2675                 }
2676         }
2677         return 1;
2678 err:
2679         kfree_skb(skb);
2680         return 0;
2681 }
2682 #endif
2683 
2684 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2685 {
2686         unsigned int i;
2687         for (i = 0; i < pkt_dev->nr_labels; i++)
2688                 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2689 
2690         mpls--;
2691         *mpls |= MPLS_STACK_BOTTOM;
2692 }
2693 
2694 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2695                                unsigned int prio)
2696 {
2697         return htons(id | (cfi << 12) | (prio << 13));
2698 }
2699 
2700 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2701                                 int datalen)
2702 {
2703         struct timeval timestamp;
2704         struct pktgen_hdr *pgh;
2705 
2706         pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2707         datalen -= sizeof(*pgh);
2708 
2709         if (pkt_dev->nfrags <= 0) {
2710                 memset(skb_put(skb, datalen), 0, datalen);
2711         } else {
2712                 int frags = pkt_dev->nfrags;
2713                 int i, len;
2714                 int frag_len;
2715 
2716 
2717                 if (frags > MAX_SKB_FRAGS)
2718                         frags = MAX_SKB_FRAGS;
2719                 len = datalen - frags * PAGE_SIZE;
2720                 if (len > 0) {
2721                         memset(skb_put(skb, len), 0, len);
2722                         datalen = frags * PAGE_SIZE;
2723                 }
2724 
2725                 i = 0;
2726                 frag_len = (datalen/frags) < PAGE_SIZE ?
2727                            (datalen/frags) : PAGE_SIZE;
2728                 while (datalen > 0) {
2729                         if (unlikely(!pkt_dev->page)) {
2730                                 int node = numa_node_id();
2731 
2732                                 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2733                                         node = pkt_dev->node;
2734                                 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2735                                 if (!pkt_dev->page)
2736                                         break;
2737                         }
2738                         get_page(pkt_dev->page);
2739                         skb_frag_set_page(skb, i, pkt_dev->page);
2740                         skb_shinfo(skb)->frags[i].page_offset = 0;
2741                         /*last fragment, fill rest of data*/
2742                         if (i == (frags - 1))
2743                                 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2744                                     (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2745                         else
2746                                 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2747                         datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2748                         skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2749                         skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2750                         i++;
2751                         skb_shinfo(skb)->nr_frags = i;
2752                 }
2753         }
2754 
2755         /* Stamp the time, and sequence number,
2756          * convert them to network byte order
2757          */
2758         pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2759         pgh->seq_num = htonl(pkt_dev->seq_num);
2760 
2761         if (pkt_dev->flags & F_NO_TIMESTAMP) {
2762                 pgh->tv_sec = 0;
2763                 pgh->tv_usec = 0;
2764         } else {
2765                 do_gettimeofday(&timestamp);
2766                 pgh->tv_sec = htonl(timestamp.tv_sec);
2767                 pgh->tv_usec = htonl(timestamp.tv_usec);
2768         }
2769 }
2770 
2771 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2772                                         struct pktgen_dev *pkt_dev,
2773                                         unsigned int extralen)
2774 {
2775         struct sk_buff *skb = NULL;
2776         unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2777                             pkt_dev->pkt_overhead;
2778 
2779         if (pkt_dev->flags & F_NODE) {
2780                 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2781 
2782                 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2783                 if (likely(skb)) {
2784                         skb_reserve(skb, NET_SKB_PAD);
2785                         skb->dev = dev;
2786                 }
2787         } else {
2788                  skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2789         }
2790 
2791         if (likely(skb))
2792                 skb_reserve(skb, LL_RESERVED_SPACE(dev));
2793 
2794         return skb;
2795 }
2796 
2797 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2798                                         struct pktgen_dev *pkt_dev)
2799 {
2800         struct sk_buff *skb = NULL;
2801         __u8 *eth;
2802         struct udphdr *udph;
2803         int datalen, iplen;
2804         struct iphdr *iph;
2805         __be16 protocol = htons(ETH_P_IP);
2806         __be32 *mpls;
2807         __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2808         __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2809         __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2810         __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2811         u16 queue_map;
2812 
2813         if (pkt_dev->nr_labels)
2814                 protocol = htons(ETH_P_MPLS_UC);
2815 
2816         if (pkt_dev->vlan_id != 0xffff)
2817                 protocol = htons(ETH_P_8021Q);
2818 
2819         /* Update any of the values, used when we're incrementing various
2820          * fields.
2821          */
2822         mod_cur_headers(pkt_dev);
2823         queue_map = pkt_dev->cur_queue_map;
2824 
2825         datalen = (odev->hard_header_len + 16) & ~0xf;
2826 
2827         skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2828         if (!skb) {
2829                 sprintf(pkt_dev->result, "No memory");
2830                 return NULL;
2831         }
2832 
2833         prefetchw(skb->data);
2834         skb_reserve(skb, datalen);
2835 
2836         /*  Reserve for ethernet and IP header  */
2837         eth = (__u8 *) skb_push(skb, 14);
2838         mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2839         if (pkt_dev->nr_labels)
2840                 mpls_push(mpls, pkt_dev);
2841 
2842         if (pkt_dev->vlan_id != 0xffff) {
2843                 if (pkt_dev->svlan_id != 0xffff) {
2844                         svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2845                         *svlan_tci = build_tci(pkt_dev->svlan_id,
2846                                                pkt_dev->svlan_cfi,
2847                                                pkt_dev->svlan_p);
2848                         svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2849                         *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2850                 }
2851                 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2852                 *vlan_tci = build_tci(pkt_dev->vlan_id,
2853                                       pkt_dev->vlan_cfi,
2854                                       pkt_dev->vlan_p);
2855                 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2856                 *vlan_encapsulated_proto = htons(ETH_P_IP);
2857         }
2858 
2859         skb_set_mac_header(skb, 0);
2860         skb_set_network_header(skb, skb->len);
2861         iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2862 
2863         skb_set_transport_header(skb, skb->len);
2864         udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2865         skb_set_queue_mapping(skb, queue_map);
2866         skb->priority = pkt_dev->skb_priority;
2867 
2868         memcpy(eth, pkt_dev->hh, 12);
2869         *(__be16 *) & eth[12] = protocol;
2870 
2871         /* Eth + IPh + UDPh + mpls */
2872         datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2873                   pkt_dev->pkt_overhead;
2874         if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2875                 datalen = sizeof(struct pktgen_hdr);
2876 
2877         udph->source = htons(pkt_dev->cur_udp_src);
2878         udph->dest = htons(pkt_dev->cur_udp_dst);
2879         udph->len = htons(datalen + 8); /* DATA + udphdr */
2880         udph->check = 0;
2881 
2882         iph->ihl = 5;
2883         iph->version = 4;
2884         iph->ttl = 32;
2885         iph->tos = pkt_dev->tos;
2886         iph->protocol = IPPROTO_UDP;    /* UDP */
2887         iph->saddr = pkt_dev->cur_saddr;
2888         iph->daddr = pkt_dev->cur_daddr;
2889         iph->id = htons(pkt_dev->ip_id);
2890         pkt_dev->ip_id++;
2891         iph->frag_off = 0;
2892         iplen = 20 + 8 + datalen;
2893         iph->tot_len = htons(iplen);
2894         ip_send_check(iph);
2895         skb->protocol = protocol;
2896         skb->dev = odev;
2897         skb->pkt_type = PACKET_HOST;
2898 
2899         pktgen_finalize_skb(pkt_dev, skb, datalen);
2900 
2901         if (!(pkt_dev->flags & F_UDPCSUM)) {
2902                 skb->ip_summed = CHECKSUM_NONE;
2903         } else if (odev->features & NETIF_F_V4_CSUM) {
2904                 skb->ip_summed = CHECKSUM_PARTIAL;
2905                 skb->csum = 0;
2906                 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2907         } else {
2908                 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2909 
2910                 /* add protocol-dependent pseudo-header */
2911                 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2912                                                 datalen + 8, IPPROTO_UDP, csum);
2913 
2914                 if (udph->check == 0)
2915                         udph->check = CSUM_MANGLED_0;
2916         }
2917 
2918 #ifdef CONFIG_XFRM
2919         if (!process_ipsec(pkt_dev, skb, protocol))
2920                 return NULL;
2921 #endif
2922 
2923         return skb;
2924 }
2925 
2926 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2927                                         struct pktgen_dev *pkt_dev)
2928 {
2929         struct sk_buff *skb = NULL;
2930         __u8 *eth;
2931         struct udphdr *udph;
2932         int datalen, udplen;
2933         struct ipv6hdr *iph;
2934         __be16 protocol = htons(ETH_P_IPV6);
2935         __be32 *mpls;
2936         __be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
2937         __be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
2938         __be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
2939         __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2940         u16 queue_map;
2941 
2942         if (pkt_dev->nr_labels)
2943                 protocol = htons(ETH_P_MPLS_UC);
2944 
2945         if (pkt_dev->vlan_id != 0xffff)
2946                 protocol = htons(ETH_P_8021Q);
2947 
2948         /* Update any of the values, used when we're incrementing various
2949          * fields.
2950          */
2951         mod_cur_headers(pkt_dev);
2952         queue_map = pkt_dev->cur_queue_map;
2953 
2954         skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2955         if (!skb) {
2956                 sprintf(pkt_dev->result, "No memory");
2957                 return NULL;
2958         }
2959 
2960         prefetchw(skb->data);
2961         skb_reserve(skb, 16);
2962 
2963         /*  Reserve for ethernet and IP header  */
2964         eth = (__u8 *) skb_push(skb, 14);
2965         mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2966         if (pkt_dev->nr_labels)
2967                 mpls_push(mpls, pkt_dev);
2968 
2969         if (pkt_dev->vlan_id != 0xffff) {
2970                 if (pkt_dev->svlan_id != 0xffff) {
2971                         svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2972                         *svlan_tci = build_tci(pkt_dev->svlan_id,
2973                                                pkt_dev->svlan_cfi,
2974                                                pkt_dev->svlan_p);
2975                         svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2976                         *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2977                 }
2978                 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2979                 *vlan_tci = build_tci(pkt_dev->vlan_id,
2980                                       pkt_dev->vlan_cfi,
2981                                       pkt_dev->vlan_p);
2982                 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2983                 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2984         }
2985 
2986         skb_set_mac_header(skb, 0);
2987         skb_set_network_header(skb, skb->len);
2988         iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2989 
2990         skb_set_transport_header(skb, skb->len);
2991         udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2992         skb_set_queue_mapping(skb, queue_map);
2993         skb->priority = pkt_dev->skb_priority;
2994 
2995         memcpy(eth, pkt_dev->hh, 12);
2996         *(__be16 *) &eth[12] = protocol;
2997 
2998         /* Eth + IPh + UDPh + mpls */
2999         datalen = pkt_dev->cur_pkt_size - 14 -
3000                   sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3001                   pkt_dev->pkt_overhead;
3002 
3003         if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
3004                 datalen = sizeof(struct pktgen_hdr);
3005                 net_info_ratelimited("increased datalen to %d\n", datalen);
3006         }
3007 
3008         udplen = datalen + sizeof(struct udphdr);
3009         udph->source = htons(pkt_dev->cur_udp_src);
3010         udph->dest = htons(pkt_dev->cur_udp_dst);
3011         udph->len = htons(udplen);
3012         udph->check = 0;
3013 
3014         *(__be32 *) iph = htonl(0x60000000);    /* Version + flow */
3015 
3016         if (pkt_dev->traffic_class) {
3017                 /* Version + traffic class + flow (0) */
3018                 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3019         }
3020 
3021         iph->hop_limit = 32;
3022 
3023         iph->payload_len = htons(udplen);
3024         iph->nexthdr = IPPROTO_UDP;
3025 
3026         iph->daddr = pkt_dev->cur_in6_daddr;
3027         iph->saddr = pkt_dev->cur_in6_saddr;
3028 
3029         skb->protocol = protocol;
3030         skb->dev = odev;
3031         skb->pkt_type = PACKET_HOST;
3032 
3033         pktgen_finalize_skb(pkt_dev, skb, datalen);
3034 
3035         if (!(pkt_dev->flags & F_UDPCSUM)) {
3036                 skb->ip_summed = CHECKSUM_NONE;
3037         } else if (odev->features & NETIF_F_V6_CSUM) {
3038                 skb->ip_summed = CHECKSUM_PARTIAL;
3039                 skb->csum_start = skb_transport_header(skb) - skb->head;
3040                 skb->csum_offset = offsetof(struct udphdr, check);
3041                 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3042         } else {
3043                 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
3044 
3045                 /* add protocol-dependent pseudo-header */
3046                 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3047 
3048                 if (udph->check == 0)
3049                         udph->check = CSUM_MANGLED_0;
3050         }
3051 
3052         return skb;
3053 }
3054 
3055 static struct sk_buff *fill_packet(struct net_device *odev,
3056                                    struct pktgen_dev *pkt_dev)
3057 {
3058         if (pkt_dev->flags & F_IPV6)
3059                 return fill_packet_ipv6(odev, pkt_dev);
3060         else
3061                 return fill_packet_ipv4(odev, pkt_dev);
3062 }
3063 
3064 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3065 {
3066         pkt_dev->seq_num = 1;
3067         pkt_dev->idle_acc = 0;
3068         pkt_dev->sofar = 0;
3069         pkt_dev->tx_bytes = 0;
3070         pkt_dev->errors = 0;
3071 }
3072 
3073 /* Set up structure for sending pkts, clear counters */
3074 
3075 static void pktgen_run(struct pktgen_thread *t)
3076 {
3077         struct pktgen_dev *pkt_dev;
3078         int started = 0;
3079 
3080         func_enter();
3081 
3082         rcu_read_lock();
3083         list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3084 
3085                 /*
3086                  * setup odev and create initial packet.
3087                  */
3088                 pktgen_setup_inject(pkt_dev);
3089 
3090                 if (pkt_dev->odev) {
3091                         pktgen_clear_counters(pkt_dev);
3092                         pkt_dev->skb = NULL;
3093                         pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3094 
3095                         set_pkt_overhead(pkt_dev);
3096 
3097                         strcpy(pkt_dev->result, "Starting");
3098                         pkt_dev->running = 1;   /* Cranke yeself! */
3099                         started++;
3100                 } else
3101                         strcpy(pkt_dev->result, "Error starting");
3102         }
3103         rcu_read_unlock();
3104         if (started)
3105                 t->control &= ~(T_STOP);
3106 }
3107 
3108 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3109 {
3110         struct pktgen_thread *t;
3111 
3112         func_enter();
3113 
3114         mutex_lock(&pktgen_thread_lock);
3115 
3116         list_for_each_entry(t, &pn->pktgen_threads, th_list)
3117                 t->control |= T_STOP;
3118 
3119         mutex_unlock(&pktgen_thread_lock);
3120 }
3121 
3122 static int thread_is_running(const struct pktgen_thread *t)
3123 {
3124         const struct pktgen_dev *pkt_dev;
3125 
3126         rcu_read_lock();
3127         list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3128                 if (pkt_dev->running) {
3129                         rcu_read_unlock();
3130                         return 1;
3131                 }
3132         rcu_read_unlock();
3133         return 0;
3134 }
3135 
3136 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3137 {
3138         while (thread_is_running(t)) {
3139 
3140                 msleep_interruptible(100);
3141 
3142                 if (signal_pending(current))
3143                         goto signal;
3144         }
3145         return 1;
3146 signal:
3147         return 0;
3148 }
3149 
3150 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3151 {
3152         struct pktgen_thread *t;
3153         int sig = 1;
3154 
3155         mutex_lock(&pktgen_thread_lock);
3156 
3157         list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3158                 sig = pktgen_wait_thread_run(t);
3159                 if (sig == 0)
3160                         break;
3161         }
3162 
3163         if (sig == 0)
3164                 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3165                         t->control |= (T_STOP);
3166 
3167         mutex_unlock(&pktgen_thread_lock);
3168         return sig;
3169 }
3170 
3171 static void pktgen_run_all_threads(struct pktgen_net *pn)
3172 {
3173         struct pktgen_thread *t;
3174 
3175         func_enter();
3176 
3177         mutex_lock(&pktgen_thread_lock);
3178 
3179         list_for_each_entry(t, &pn->pktgen_threads, th_list)
3180                 t->control |= (T_RUN);
3181 
3182         mutex_unlock(&pktgen_thread_lock);
3183 
3184         /* Propagate thread->control  */
3185         schedule_timeout_interruptible(msecs_to_jiffies(125));
3186 
3187         pktgen_wait_all_threads_run(pn);
3188 }
3189 
3190 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3191 {
3192         struct pktgen_thread *t;
3193 
3194         func_enter();
3195 
3196         mutex_lock(&pktgen_thread_lock);
3197 
3198         list_for_each_entry(t, &pn->pktgen_threads, th_list)
3199                 t->control |= (T_REMDEVALL);
3200 
3201         mutex_unlock(&pktgen_thread_lock);
3202 
3203         /* Propagate thread->control  */
3204         schedule_timeout_interruptible(msecs_to_jiffies(125));
3205 
3206         pktgen_wait_all_threads_run(pn);
3207 }
3208 
3209 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3210 {
3211         __u64 bps, mbps, pps;
3212         char *p = pkt_dev->result;
3213         ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3214                                     pkt_dev->started_at);
3215         ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3216 
3217         p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3218                      (unsigned long long)ktime_to_us(elapsed),
3219                      (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3220                      (unsigned long long)ktime_to_us(idle),
3221                      (unsigned long long)pkt_dev->sofar,
3222                      pkt_dev->cur_pkt_size, nr_frags);
3223 
3224         pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3225                         ktime_to_ns(elapsed));
3226 
3227         bps = pps * 8 * pkt_dev->cur_pkt_size;
3228 
3229         mbps = bps;
3230         do_div(mbps, 1000000);
3231         p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
3232                      (unsigned long long)pps,
3233                      (unsigned long long)mbps,
3234                      (unsigned long long)bps,
3235                      (unsigned long long)pkt_dev->errors);
3236 }
3237 
3238 /* Set stopped-at timer, remove from running list, do counters & statistics */
3239 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3240 {
3241         int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3242 
3243         if (!pkt_dev->running) {
3244                 pr_warn("interface: %s is already stopped\n",
3245                         pkt_dev->odevname);
3246                 return -EINVAL;
3247         }
3248 
3249         pkt_dev->running = 0;
3250         kfree_skb(pkt_dev->skb);
3251         pkt_dev->skb = NULL;
3252         pkt_dev->stopped_at = ktime_get();
3253 
3254         show_results(pkt_dev, nr_frags);
3255 
3256         return 0;
3257 }
3258 
3259 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3260 {
3261         struct pktgen_dev *pkt_dev, *best = NULL;
3262 
3263         rcu_read_lock();
3264         list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3265                 if (!pkt_dev->running)
3266                         continue;
3267                 if (best == NULL)
3268                         best = pkt_dev;
3269                 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3270                         best = pkt_dev;
3271         }
3272         rcu_read_unlock();
3273 
3274         return best;
3275 }
3276 
3277 static void pktgen_stop(struct pktgen_thread *t)
3278 {
3279         struct pktgen_dev *pkt_dev;
3280 
3281         func_enter();
3282 
3283         rcu_read_lock();
3284 
3285         list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3286                 pktgen_stop_device(pkt_dev);
3287         }
3288 
3289         rcu_read_unlock();
3290 }
3291 
3292 /*
3293  * one of our devices needs to be removed - find it
3294  * and remove it
3295  */
3296 static void pktgen_rem_one_if(struct pktgen_thread *t)
3297 {
3298         struct list_head *q, *n;
3299         struct pktgen_dev *cur;
3300 
3301         func_enter();
3302 
3303         list_for_each_safe(q, n, &t->if_list) {
3304                 cur = list_entry(q, struct pktgen_dev, list);
3305 
3306                 if (!cur->removal_mark)
3307                         continue;
3308 
3309                 kfree_skb(cur->skb);
3310                 cur->skb = NULL;
3311 
3312                 pktgen_remove_device(t, cur);
3313 
3314                 break;
3315         }
3316 }
3317 
3318 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3319 {
3320         struct list_head *q, *n;
3321         struct pktgen_dev *cur;
3322 
3323         func_enter();
3324 
3325         /* Remove all devices, free mem */
3326 
3327         list_for_each_safe(q, n, &t->if_list) {
3328                 cur = list_entry(q, struct pktgen_dev, list);
3329 
3330                 kfree_skb(cur->skb);
3331                 cur->skb = NULL;
3332 
3333                 pktgen_remove_device(t, cur);
3334         }
3335 }
3336 
3337 static void pktgen_rem_thread(struct pktgen_thread *t)
3338 {
3339         /* Remove from the thread list */
3340         remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3341 }
3342 
3343 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3344 {
3345         ktime_t idle_start = ktime_get();
3346         schedule();
3347         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3348 }
3349 
3350 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3351 {
3352         ktime_t idle_start = ktime_get();
3353 
3354         while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3355                 if (signal_pending(current))
3356                         break;
3357 
3358                 if (need_resched())
3359                         pktgen_resched(pkt_dev);
3360                 else
3361                         cpu_relax();
3362         }
3363         pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3364 }
3365 
3366 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3367 {
3368         unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3369         struct net_device *odev = pkt_dev->odev;
3370         struct netdev_queue *txq;
3371         struct sk_buff *skb;
3372         int ret;
3373 
3374         /* If device is offline, then don't send */
3375         if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3376                 pktgen_stop_device(pkt_dev);
3377                 return;
3378         }
3379 
3380         /* This is max DELAY, this has special meaning of
3381          * "never transmit"
3382          */
3383         if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3384                 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3385                 return;
3386         }
3387 
3388         /* If no skb or clone count exhausted then get new one */
3389         if (!pkt_dev->skb || (pkt_dev->last_ok &&
3390                               ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3391                 /* build a new pkt */
3392                 kfree_skb(pkt_dev->skb);
3393 
3394                 pkt_dev->skb = fill_packet(odev, pkt_dev);
3395                 if (pkt_dev->skb == NULL) {
3396                         pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3397                         schedule();
3398                         pkt_dev->clone_count--; /* back out increment, OOM */
3399                         return;
3400                 }
3401                 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3402                 pkt_dev->clone_count = 0;       /* reset counter */
3403         }
3404 
3405         if (pkt_dev->delay && pkt_dev->last_ok)
3406                 spin(pkt_dev, pkt_dev->next_tx);
3407 
3408         if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3409                 skb = pkt_dev->skb;
3410                 skb->protocol = eth_type_trans(skb, skb->dev);
3411                 atomic_add(burst, &skb->users);
3412                 local_bh_disable();
3413                 do {
3414                         ret = netif_receive_skb(skb);
3415                         if (ret == NET_RX_DROP)
3416                                 pkt_dev->errors++;
3417                         pkt_dev->sofar++;
3418                         pkt_dev->seq_num++;
3419                         if (atomic_read(&skb->users) != burst) {
3420                                 /* skb was queued by rps/rfs or taps,
3421                                  * so cannot reuse this skb
3422                                  */
3423                                 atomic_sub(burst - 1, &skb->users);
3424                                 /* get out of the loop and wait
3425                                  * until skb is consumed
3426                                  */
3427                                 break;
3428                         }
3429                         /* skb was 'freed' by stack, so clean few
3430                          * bits and reuse it
3431                          */
3432 #ifdef CONFIG_NET_CLS_ACT
3433                         skb->tc_verd = 0; /* reset reclass/redir ttl */
3434 #endif
3435                 } while (--burst > 0);
3436                 goto out; /* Skips xmit_mode M_START_XMIT */
3437         }
3438 
3439         txq = skb_get_tx_queue(odev, pkt_dev->skb);
3440 
3441         local_bh_disable();
3442 
3443         HARD_TX_LOCK(odev, txq, smp_processor_id());
3444 
3445         if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3446                 ret = NETDEV_TX_BUSY;
3447                 pkt_dev->last_ok = 0;
3448                 goto unlock;
3449         }
3450         atomic_add(burst, &pkt_dev->skb->users);
3451 
3452 xmit_more:
3453         ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3454 
3455         switch (ret) {
3456         case NETDEV_TX_OK:
3457                 pkt_dev->last_ok = 1;
3458                 pkt_dev->sofar++;
3459                 pkt_dev->seq_num++;
3460                 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3461                 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3462                         goto xmit_more;
3463                 break;
3464         case NET_XMIT_DROP:
3465         case NET_XMIT_CN:
3466         case NET_XMIT_POLICED:
3467                 /* skb has been consumed */
3468                 pkt_dev->errors++;
3469                 break;
3470         default: /* Drivers are not supposed to return other values! */
3471                 net_info_ratelimited("%s xmit error: %d\n",
3472                                      pkt_dev->odevname, ret);
3473                 pkt_dev->errors++;
3474                 /* fallthru */
3475         case NETDEV_TX_LOCKED:
3476         case NETDEV_TX_BUSY:
3477                 /* Retry it next time */
3478                 atomic_dec(&(pkt_dev->skb->users));
3479                 pkt_dev->last_ok = 0;
3480         }
3481         if (unlikely(burst))
3482                 atomic_sub(burst, &pkt_dev->skb->users);
3483 unlock:
3484         HARD_TX_UNLOCK(odev, txq);
3485 
3486 out:
3487         local_bh_enable();
3488 
3489         /* If pkt_dev->count is zero, then run forever */
3490         if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3491                 pktgen_wait_for_skb(pkt_dev);
3492 
3493                 /* Done with this */
3494                 pktgen_stop_device(pkt_dev);
3495         }
3496 }
3497 
3498 /*
3499  * Main loop of the thread goes here
3500  */
3501 
3502 static int pktgen_thread_worker(void *arg)
3503 {
3504         DEFINE_WAIT(wait);
3505         struct pktgen_thread *t = arg;
3506         struct pktgen_dev *pkt_dev = NULL;
3507         int cpu = t->cpu;
3508 
3509         BUG_ON(smp_processor_id() != cpu);
3510 
3511         init_waitqueue_head(&t->queue);
3512         complete(&t->start_done);
3513 
3514         pr_debug("starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
3515 
3516         set_freezable();
3517 
3518         while (!kthread_should_stop()) {
3519                 pkt_dev = next_to_run(t);
3520 
3521                 if (unlikely(!pkt_dev && t->control == 0)) {
3522                         if (t->net->pktgen_exiting)
3523                                 break;
3524                         wait_event_interruptible_timeout(t->queue,
3525                                                          t->control != 0,
3526                                                          HZ/10);
3527                         try_to_freeze();
3528                         continue;
3529                 }
3530 
3531                 if (likely(pkt_dev)) {
3532                         pktgen_xmit(pkt_dev);
3533 
3534                         if (need_resched())
3535                                 pktgen_resched(pkt_dev);
3536                         else
3537                                 cpu_relax();
3538                 }
3539 
3540                 if (t->control & T_STOP) {
3541                         pktgen_stop(t);
3542                         t->control &= ~(T_STOP);
3543                 }
3544 
3545                 if (t->control & T_RUN) {
3546                         pktgen_run(t);
3547                         t->control &= ~(T_RUN);
3548                 }
3549 
3550                 if (t->control & T_REMDEVALL) {
3551                         pktgen_rem_all_ifs(t);
3552                         t->control &= ~(T_REMDEVALL);
3553                 }
3554 
3555                 if (t->control & T_REMDEV) {
3556                         pktgen_rem_one_if(t);
3557                         t->control &= ~(T_REMDEV);
3558                 }
3559 
3560                 try_to_freeze();
3561         }
3562 
3563         pr_debug("%s stopping all device\n", t->tsk->comm);
3564         pktgen_stop(t);
3565 
3566         pr_debug("%s removing all device\n", t->tsk->comm);
3567         pktgen_rem_all_ifs(t);
3568 
3569         pr_debug("%s removing thread\n", t->tsk->comm);
3570         pktgen_rem_thread(t);
3571 
3572         return 0;
3573 }
3574 
3575 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3576                                           const char *ifname, bool exact)
3577 {
3578         struct pktgen_dev *p, *pkt_dev = NULL;
3579         size_t len = strlen(ifname);
3580 
3581         rcu_read_lock();
3582         list_for_each_entry_rcu(p, &t->if_list, list)
3583                 if (strncmp(p->odevname, ifname, len) == 0) {
3584                         if (p->odevname[len]) {
3585                                 if (exact || p->odevname[len] != '@')
3586                                         continue;
3587                         }
3588                         pkt_dev = p;
3589                         break;
3590                 }
3591 
3592         rcu_read_unlock();
3593         pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3594         return pkt_dev;
3595 }
3596 
3597 /*
3598  * Adds a dev at front of if_list.
3599  */
3600 
3601 static int add_dev_to_thread(struct pktgen_thread *t,
3602                              struct pktgen_dev *pkt_dev)
3603 {
3604         int rv = 0;
3605 
3606         /* This function cannot be called concurrently, as its called
3607          * under pktgen_thread_lock mutex, but it can run from
3608          * userspace on another CPU than the kthread.  The if_lock()
3609          * is used here to sync with concurrent instances of
3610          * _rem_dev_from_if_list() invoked via kthread, which is also
3611          * updating the if_list */
3612         if_lock(t);
3613 
3614         if (pkt_dev->pg_thread) {
3615                 pr_err("ERROR: already assigned to a thread\n");
3616                 rv = -EBUSY;
3617                 goto out;
3618         }
3619 
3620         pkt_dev->running = 0;
3621         pkt_dev->pg_thread = t;
3622         list_add_rcu(&pkt_dev->list, &t->if_list);
3623 
3624 out:
3625         if_unlock(t);
3626         return rv;
3627 }
3628 
3629 /* Called under thread lock */
3630 
3631 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3632 {
3633         struct pktgen_dev *pkt_dev;
3634         int err;
3635         int node = cpu_to_node(t->cpu);
3636 
3637         /* We don't allow a device to be on several threads */
3638 
3639         pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3640         if (pkt_dev) {
3641                 pr_err("ERROR: interface already used\n");
3642                 return -EBUSY;
3643         }
3644 
3645         pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3646         if (!pkt_dev)
3647                 return -ENOMEM;
3648 
3649         strcpy(pkt_dev->odevname, ifname);
3650         pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3651                                       node);
3652         if (pkt_dev->flows == NULL) {
3653                 kfree(pkt_dev);
3654                 return -ENOMEM;
3655         }
3656 
3657         pkt_dev->removal_mark = 0;
3658         pkt_dev->nfrags = 0;
3659         pkt_dev->delay = pg_delay_d;
3660         pkt_dev->count = pg_count_d;
3661         pkt_dev->sofar = 0;
3662         pkt_dev->udp_src_min = 9;       /* sink port */
3663         pkt_dev->udp_src_max = 9;
3664         pkt_dev->udp_dst_min = 9;
3665         pkt_dev->udp_dst_max = 9;
3666         pkt_dev->vlan_p = 0;
3667         pkt_dev->vlan_cfi = 0;
3668         pkt_dev->vlan_id = 0xffff;
3669         pkt_dev->svlan_p = 0;
3670         pkt_dev->svlan_cfi = 0;
3671         pkt_dev->svlan_id = 0xffff;
3672         pkt_dev->burst = 1;
3673         pkt_dev->node = -1;
3674 
3675         err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3676         if (err)
3677                 goto out1;
3678         if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3679                 pkt_dev->clone_skb = pg_clone_skb_d;
3680 
3681         pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3682                                           &pktgen_if_fops, pkt_dev);
3683         if (!pkt_dev->entry) {
3684                 pr_err("cannot create %s/%s procfs entry\n",
3685                        PG_PROC_DIR, ifname);
3686                 err = -EINVAL;
3687                 goto out2;
3688         }
3689 #ifdef CONFIG_XFRM
3690         pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3691         pkt_dev->ipsproto = IPPROTO_ESP;
3692 
3693         /* xfrm tunnel mode needs additional dst to extract outter
3694          * ip header protocol/ttl/id field, here creat a phony one.
3695          * instead of looking for a valid rt, which definitely hurting
3696          * performance under such circumstance.
3697          */
3698         pkt_dev->dstops.family = AF_INET;
3699         pkt_dev->dst.dev = pkt_dev->odev;
3700         dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3701         pkt_dev->dst.child = &pkt_dev->dst;
3702         pkt_dev->dst.ops = &pkt_dev->dstops;
3703 #endif
3704 
3705         return add_dev_to_thread(t, pkt_dev);
3706 out2:
3707         dev_put(pkt_dev->odev);
3708 out1:
3709 #ifdef CONFIG_XFRM
3710         free_SAs(pkt_dev);
3711 #endif
3712         vfree(pkt_dev->flows);
3713         kfree(pkt_dev);
3714         return err;
3715 }
3716 
3717 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3718 {
3719         struct pktgen_thread *t;
3720         struct proc_dir_entry *pe;
3721         struct task_struct *p;
3722 
3723         t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3724                          cpu_to_node(cpu));
3725         if (!t) {
3726                 pr_err("ERROR: out of memory, can't create new thread\n");
3727                 return -ENOMEM;
3728         }
3729 
3730         spin_lock_init(&t->if_lock);
3731         t->cpu = cpu;
3732 
3733         INIT_LIST_HEAD(&t->if_list);
3734 
3735         list_add_tail(&t->th_list, &pn->pktgen_threads);
3736         init_completion(&t->start_done);
3737 
3738         p = kthread_create_on_node(pktgen_thread_worker,
3739                                    t,
3740                                    cpu_to_node(cpu),
3741                                    "kpktgend_%d", cpu);
3742         if (IS_ERR(p)) {
3743                 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3744                 list_del(&t->th_list);
3745                 kfree(t);
3746                 return PTR_ERR(p);
3747         }
3748         kthread_bind(p, cpu);
3749         t->tsk = p;
3750 
3751         pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3752                               &pktgen_thread_fops, t);
3753         if (!pe) {
3754                 pr_err("cannot create %s/%s procfs entry\n",
3755                        PG_PROC_DIR, t->tsk->comm);
3756                 kthread_stop(p);
3757                 list_del(&t->th_list);
3758                 kfree(t);
3759                 return -EINVAL;
3760         }
3761 
3762         t->net = pn;
3763         get_task_struct(p);
3764         wake_up_process(p);
3765         wait_for_completion(&t->start_done);
3766 
3767         return 0;
3768 }
3769 
3770 /*
3771  * Removes a device from the thread if_list.
3772  */
3773 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3774                                   struct pktgen_dev *pkt_dev)
3775 {
3776         struct list_head *q, *n;
3777         struct pktgen_dev *p;
3778 
3779         if_lock(t);
3780         list_for_each_safe(q, n, &t->if_list) {
3781                 p = list_entry(q, struct pktgen_dev, list);
3782                 if (p == pkt_dev)
3783                         list_del_rcu(&p->list);
3784         }
3785         if_unlock(t);
3786 }
3787 
3788 static int pktgen_remove_device(struct pktgen_thread *t,
3789                                 struct pktgen_dev *pkt_dev)
3790 {
3791         pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3792 
3793         if (pkt_dev->running) {
3794                 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3795                 pktgen_stop_device(pkt_dev);
3796         }
3797 
3798         /* Dis-associate from the interface */
3799 
3800         if (pkt_dev->odev) {
3801                 dev_put(pkt_dev->odev);
3802                 pkt_dev->odev = NULL;
3803         }
3804 
3805         /* Remove proc before if_list entry, because add_device uses
3806          * list to determine if interface already exist, avoid race
3807          * with proc_create_data() */
3808         proc_remove(pkt_dev->entry);
3809 
3810         /* And update the thread if_list */
3811         _rem_dev_from_if_list(t, pkt_dev);
3812 
3813 #ifdef CONFIG_XFRM
3814         free_SAs(pkt_dev);
3815 #endif
3816         vfree(pkt_dev->flows);
3817         if (pkt_dev->page)
3818                 put_page(pkt_dev->page);
3819         kfree_rcu(pkt_dev, rcu);
3820         return 0;
3821 }
3822 
3823 static int __net_init pg_net_init(struct net *net)
3824 {
3825         struct pktgen_net *pn = net_generic(net, pg_net_id);
3826         struct proc_dir_entry *pe;
3827         int cpu, ret = 0;
3828 
3829         pn->net = net;
3830         INIT_LIST_HEAD(&pn->pktgen_threads);
3831         pn->pktgen_exiting = false;
3832         pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3833         if (!pn->proc_dir) {
3834                 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3835                 return -ENODEV;
3836         }
3837         pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3838         if (pe == NULL) {
3839                 pr_err("cannot create %s procfs entry\n", PGCTRL);
3840                 ret = -EINVAL;
3841                 goto remove;
3842         }
3843 
3844         for_each_online_cpu(cpu) {
3845                 int err;
3846 
3847                 err = pktgen_create_thread(cpu, pn);
3848                 if (err)
3849                         pr_warn("Cannot create thread for cpu %d (%d)\n",
3850                                    cpu, err);
3851         }
3852 
3853         if (list_empty(&pn->pktgen_threads)) {
3854                 pr_err("Initialization failed for all threads\n");
3855                 ret = -ENODEV;
3856                 goto remove_entry;
3857         }
3858 
3859         return 0;
3860 
3861 remove_entry:
3862         remove_proc_entry(PGCTRL, pn->proc_dir);
3863 remove:
3864         remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3865         return ret;
3866 }
3867 
3868 static void __net_exit pg_net_exit(struct net *net)
3869 {
3870         struct pktgen_net *pn = net_generic(net, pg_net_id);
3871         struct pktgen_thread *t;
3872         struct list_head *q, *n;
3873         LIST_HEAD(list);
3874 
3875         /* Stop all interfaces & threads */
3876         pn->pktgen_exiting = true;
3877 
3878         mutex_lock(&pktgen_thread_lock);
3879         list_splice_init(&pn->pktgen_threads, &list);
3880         mutex_unlock(&pktgen_thread_lock);
3881 
3882         list_for_each_safe(q, n, &list) {
3883                 t = list_entry(q, struct pktgen_thread, th_list);
3884                 list_del(&t->th_list);
3885                 kthread_stop(t->tsk);
3886                 put_task_struct(t->tsk);
3887                 kfree(t);
3888         }
3889 
3890         remove_proc_entry(PGCTRL, pn->proc_dir);
3891         remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3892 }
3893 
3894 static struct pernet_operations pg_net_ops = {
3895         .init = pg_net_init,
3896         .exit = pg_net_exit,
3897         .id   = &pg_net_id,
3898         .size = sizeof(struct pktgen_net),
3899 };
3900 
3901 static int __init pg_init(void)
3902 {
3903         int ret = 0;
3904 
3905         pr_info("%s", version);
3906         ret = register_pernet_subsys(&pg_net_ops);
3907         if (ret)
3908                 return ret;
3909         ret = register_netdevice_notifier(&pktgen_notifier_block);
3910         if (ret)
3911                 unregister_pernet_subsys(&pg_net_ops);
3912 
3913         return ret;
3914 }
3915 
3916 static void __exit pg_cleanup(void)
3917 {
3918         unregister_netdevice_notifier(&pktgen_notifier_block);
3919         unregister_pernet_subsys(&pg_net_ops);
3920         /* Don't need rcu_barrier() due to use of kfree_rcu() */
3921 }
3922 
3923 module_init(pg_init);
3924 module_exit(pg_cleanup);
3925 
3926 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3927 MODULE_DESCRIPTION("Packet Generator tool");
3928 MODULE_LICENSE("GPL");
3929 MODULE_VERSION(VERSION);
3930 module_param(pg_count_d, int, 0);
3931 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3932 module_param(pg_delay_d, int, 0);
3933 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3934 module_param(pg_clone_skb_d, int, 0);
3935 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3936 module_param(debug, int, 0);
3937 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
3938 

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