3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
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.
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.
23 * Additional hacking by:
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>
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
54 * Also moved to /proc/net/pktgen/
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>
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
84 * Fix refcount off by one if first packet fails, potential null deref,
87 * First "ranges" functionality for ipv6 030726 --ro
89 * Included flow support. 030802 ANK.
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
99 * Randy Dunlap fixed u64 printk compiler waring
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
110 #include <linux/sys.h>
111 #include <linux/types.h>
112 #include <linux/module.h>
113 #include <linux/moduleparam.h>
114 #include <linux/kernel.h>
115 #include <linux/smp_lock.h>
116 #include <linux/sched.h>
117 #include <linux/slab.h>
118 #include <linux/vmalloc.h>
119 #include <linux/unistd.h>
120 #include <linux/string.h>
121 #include <linux/ptrace.h>
122 #include <linux/errno.h>
123 #include <linux/ioport.h>
124 #include <linux/interrupt.h>
125 #include <linux/capability.h>
126 #include <linux/delay.h>
127 #include <linux/timer.h>
128 #include <linux/init.h>
129 #include <linux/skbuff.h>
130 #include <linux/netdevice.h>
131 #include <linux/inet.h>
132 #include <linux/inetdevice.h>
133 #include <linux/rtnetlink.h>
134 #include <linux/if_arp.h>
135 #include <linux/in.h>
136 #include <linux/ip.h>
137 #include <linux/ipv6.h>
138 #include <linux/udp.h>
139 #include <linux/proc_fs.h>
140 #include <linux/seq_file.h>
141 #include <linux/wait.h>
142 #include <linux/etherdevice.h>
143 #include <net/checksum.h>
144 #include <net/ipv6.h>
145 #include <net/addrconf.h>
146 #include <asm/byteorder.h>
147 #include <linux/rcupdate.h>
148 #include <asm/bitops.h>
151 #include <asm/uaccess.h>
152 #include <asm/div64.h> /* do_div */
153 #include <asm/timex.h>
156 #define VERSION "pktgen v2.63: Packet Generator for packet performance testing.\n"
158 /* #define PG_DEBUG(a) a */
161 /* The buckets are exponential in 'width' */
162 #define LAT_BUCKETS_MAX 32
163 #define IP_NAME_SZ 32
165 /* Device flag bits */
166 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
167 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
168 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
169 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
170 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
171 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
172 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
173 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
175 /* Thread control flag bits */
176 #define T_TERMINATE (1<<0)
177 #define T_STOP (1<<1) /* Stop run */
178 #define T_RUN (1<<2) /* Start run */
179 #define T_REMDEV (1<<3) /* Remove all devs */
182 #define thread_lock() down(&pktgen_sem)
183 #define thread_unlock() up(&pktgen_sem)
185 /* If lock -- can be removed after some work */
186 #define if_lock(t) spin_lock(&(t->if_lock));
187 #define if_unlock(t) spin_unlock(&(t->if_lock));
189 /* Used to help with determining the pkts on receive */
190 #define PKTGEN_MAGIC 0xbe9be955
191 #define PG_PROC_DIR "pktgen"
192 #define PGCTRL "pgctrl"
193 static struct proc_dir_entry
*pg_proc_dir
= NULL
;
195 #define MAX_CFLOWS 65536
206 * Try to keep frequent/infrequent used vars. separated.
209 char ifname
[IFNAMSIZ
];
212 struct pktgen_thread
* pg_thread
; /* the owner */
213 struct pktgen_dev
*next
; /* Used for chaining in the thread's run-queue */
215 int running
; /* if this changes to false, the test will stop */
217 /* If min != max, then we will either do a linear iteration, or
218 * we will do a random selection from within the range.
222 int min_pkt_size
; /* = ETH_ZLEN; */
223 int max_pkt_size
; /* = ETH_ZLEN; */
225 __u32 delay_us
; /* Default delay */
227 __u64 count
; /* Default No packets to send */
228 __u64 sofar
; /* How many pkts we've sent so far */
229 __u64 tx_bytes
; /* How many bytes we've transmitted */
230 __u64 errors
; /* Errors when trying to transmit, pkts will be re-sent */
232 /* runtime counters relating to clone_skb */
233 __u64 next_tx_us
; /* timestamp of when to tx next */
236 __u64 allocated_skbs
;
238 int last_ok
; /* Was last skb sent?
239 * Or a failed transmit of some sort? This will keep
240 * sequence numbers in order, for example.
242 __u64 started_at
; /* micro-seconds */
243 __u64 stopped_at
; /* micro-seconds */
244 __u64 idle_acc
; /* micro-seconds */
247 int clone_skb
; /* Use multiple SKBs during packet gen. If this number
248 * is greater than 1, then that many copies of the same
249 * packet will be sent before a new packet is allocated.
250 * For instance, if you want to send 1024 identical packets
251 * before creating a new packet, set clone_skb to 1024.
254 char dst_min
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
255 char dst_max
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
256 char src_min
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
257 char src_max
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
259 struct in6_addr in6_saddr
;
260 struct in6_addr in6_daddr
;
261 struct in6_addr cur_in6_daddr
;
262 struct in6_addr cur_in6_saddr
;
264 struct in6_addr min_in6_daddr
;
265 struct in6_addr max_in6_daddr
;
266 struct in6_addr min_in6_saddr
;
267 struct in6_addr max_in6_saddr
;
269 /* If we're doing ranges, random or incremental, then this
270 * defines the min/max for those ranges.
272 __u32 saddr_min
; /* inclusive, source IP address */
273 __u32 saddr_max
; /* exclusive, source IP address */
274 __u32 daddr_min
; /* inclusive, dest IP address */
275 __u32 daddr_max
; /* exclusive, dest IP address */
277 __u16 udp_src_min
; /* inclusive, source UDP port */
278 __u16 udp_src_max
; /* exclusive, source UDP port */
279 __u16 udp_dst_min
; /* inclusive, dest UDP port */
280 __u16 udp_dst_max
; /* exclusive, dest UDP port */
282 __u32 src_mac_count
; /* How many MACs to iterate through */
283 __u32 dst_mac_count
; /* How many MACs to iterate through */
285 unsigned char dst_mac
[ETH_ALEN
];
286 unsigned char src_mac
[ETH_ALEN
];
288 __u32 cur_dst_mac_offset
;
289 __u32 cur_src_mac_offset
;
298 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
300 We fill in SRC address later
301 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
305 __u16 pad
; /* pad out the hh struct to an even 16 bytes */
307 struct sk_buff
* skb
; /* skb we are to transmit next, mainly used for when we
308 * are transmitting the same one multiple times
310 struct net_device
* odev
; /* The out-going device. Note that the device should
311 * have it's pg_info pointer pointing back to this
312 * device. This will be set when the user specifies
313 * the out-going device name (not when the inject is
314 * started as it used to do.)
316 struct flow_state
*flows
;
317 unsigned cflows
; /* Concurrent flows (config) */
318 unsigned lflow
; /* Flow length (config) */
319 unsigned nflows
; /* accumulated flows (stats) */
329 struct pktgen_thread
{
331 struct pktgen_dev
*if_list
; /* All device here */
332 struct pktgen_thread
* next
;
335 u32 max_before_softirq
; /* We'll call do_softirq to prevent starvation. */
337 /* Field for thread to receive "posted" events terminate, stop ifs etc.*/
343 wait_queue_head_t queue
;
349 /* This code works around the fact that do_div cannot handle two 64-bit
350 numbers, and regular 64-bit division doesn't work on x86 kernels.
356 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
357 * Function copied/adapted/optimized from:
359 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
361 * Copyright 1994, University of Cambridge Computer Laboratory
362 * All Rights Reserved.
365 static inline s64
divremdi3(s64 x
, s64 y
, int type
)
367 u64 a
= (x
< 0) ? -x
: x
;
368 u64 b
= (y
< 0) ? -y
: y
;
388 if (PG_DIV
== type
) {
389 return (((x
^ y
) & (1ll<<63)) == 0) ? res
: -(s64
)res
;
392 return ((x
& (1ll<<63)) == 0) ? a
: -(s64
)a
;
396 /* End of hacks to deal with 64-bit math on x86 */
398 /** Convert to milliseconds */
399 static inline __u64
tv_to_ms(const struct timeval
* tv
)
401 __u64 ms
= tv
->tv_usec
/ 1000;
402 ms
+= (__u64
)tv
->tv_sec
* (__u64
)1000;
407 /** Convert to micro-seconds */
408 static inline __u64
tv_to_us(const struct timeval
* tv
)
410 __u64 us
= tv
->tv_usec
;
411 us
+= (__u64
)tv
->tv_sec
* (__u64
)1000000;
415 static inline __u64
pg_div(__u64 n
, __u32 base
) {
418 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
423 static inline __u64
pg_div64(__u64 n
, __u64 base
)
427 * How do we know if the architecture we are running on
428 * supports division with 64 bit base?
431 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
435 tmp
= divremdi3(n
, base
, PG_DIV
);
440 static inline u32
pktgen_random(void)
444 get_random_bytes(&n
, 4);
451 static inline __u64
getCurMs(void)
454 do_gettimeofday(&tv
);
455 return tv_to_ms(&tv
);
458 static inline __u64
getCurUs(void)
461 do_gettimeofday(&tv
);
462 return tv_to_us(&tv
);
465 static inline __u64
tv_diff(const struct timeval
* a
, const struct timeval
* b
)
467 return tv_to_us(a
) - tv_to_us(b
);
471 /* old include end */
473 static char version
[] __initdata
= VERSION
;
475 static int pktgen_remove_device(struct pktgen_thread
* t
, struct pktgen_dev
*i
);
476 static int pktgen_add_device(struct pktgen_thread
* t
, const char* ifname
);
477 static struct pktgen_dev
*pktgen_find_dev(struct pktgen_thread
* t
, const char* ifname
);
478 static int pktgen_device_event(struct notifier_block
*, unsigned long, void *);
479 static void pktgen_run_all_threads(void);
480 static void pktgen_stop_all_threads_ifs(void);
481 static int pktgen_stop_device(struct pktgen_dev
*pkt_dev
);
482 static void pktgen_stop(struct pktgen_thread
* t
);
483 static void pktgen_clear_counters(struct pktgen_dev
*pkt_dev
);
484 static struct pktgen_dev
*pktgen_NN_threads(const char* dev_name
, int remove
);
485 static unsigned int scan_ip6(const char *s
,char ip
[16]);
486 static unsigned int fmt_ip6(char *s
,const char ip
[16]);
488 /* Module parameters, defaults. */
489 static int pg_count_d
= 1000; /* 1000 pkts by default */
490 static int pg_delay_d
;
491 static int pg_clone_skb_d
;
494 static DECLARE_MUTEX(pktgen_sem
);
495 static struct pktgen_thread
*pktgen_threads
= NULL
;
497 static struct notifier_block pktgen_notifier_block
= {
498 .notifier_call
= pktgen_device_event
,
502 * /proc handling functions
506 static int pgctrl_show(struct seq_file
*seq
, void *v
)
508 seq_puts(seq
, VERSION
);
512 static ssize_t
pgctrl_write(struct file
* file
,const char __user
* buf
,
513 size_t count
, loff_t
*ppos
)
518 if (!capable(CAP_NET_ADMIN
)){
523 if (count
> sizeof(data
))
524 count
= sizeof(data
);
526 if (copy_from_user(data
, buf
, count
)) {
530 data
[count
-1] = 0; /* Make string */
532 if (!strcmp(data
, "stop"))
533 pktgen_stop_all_threads_ifs();
535 else if (!strcmp(data
, "start"))
536 pktgen_run_all_threads();
539 printk("pktgen: Unknown command: %s\n", data
);
547 static int pgctrl_open(struct inode
*inode
, struct file
*file
)
549 return single_open(file
, pgctrl_show
, PDE(inode
)->data
);
552 static struct file_operations pktgen_fops
= {
553 .owner
= THIS_MODULE
,
557 .write
= pgctrl_write
,
558 .release
= single_release
,
561 static int pktgen_if_show(struct seq_file
*seq
, void *v
)
564 struct pktgen_dev
*pkt_dev
= seq
->private;
567 __u64 now
= getCurUs();
569 seq_printf(seq
, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
570 (unsigned long long) pkt_dev
->count
,
571 pkt_dev
->min_pkt_size
, pkt_dev
->max_pkt_size
);
573 seq_printf(seq
, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
574 pkt_dev
->nfrags
, 1000*pkt_dev
->delay_us
+pkt_dev
->delay_ns
, pkt_dev
->clone_skb
, pkt_dev
->ifname
);
576 seq_printf(seq
, " flows: %u flowlen: %u\n", pkt_dev
->cflows
, pkt_dev
->lflow
);
579 if(pkt_dev
->flags
& F_IPV6
) {
580 char b1
[128], b2
[128], b3
[128];
581 fmt_ip6(b1
, pkt_dev
->in6_saddr
.s6_addr
);
582 fmt_ip6(b2
, pkt_dev
->min_in6_saddr
.s6_addr
);
583 fmt_ip6(b3
, pkt_dev
->max_in6_saddr
.s6_addr
);
584 seq_printf(seq
, " saddr: %s min_saddr: %s max_saddr: %s\n", b1
, b2
, b3
);
586 fmt_ip6(b1
, pkt_dev
->in6_daddr
.s6_addr
);
587 fmt_ip6(b2
, pkt_dev
->min_in6_daddr
.s6_addr
);
588 fmt_ip6(b3
, pkt_dev
->max_in6_daddr
.s6_addr
);
589 seq_printf(seq
, " daddr: %s min_daddr: %s max_daddr: %s\n", b1
, b2
, b3
);
593 seq_printf(seq
," dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
594 pkt_dev
->dst_min
, pkt_dev
->dst_max
, pkt_dev
->src_min
, pkt_dev
->src_max
);
596 seq_puts(seq
, " src_mac: ");
598 if (is_zero_ether_addr(pkt_dev
->src_mac
))
599 for (i
= 0; i
< 6; i
++)
600 seq_printf(seq
, "%02X%s", pkt_dev
->odev
->dev_addr
[i
], i
== 5 ? " " : ":");
602 for (i
= 0; i
< 6; i
++)
603 seq_printf(seq
, "%02X%s", pkt_dev
->src_mac
[i
], i
== 5 ? " " : ":");
605 seq_printf(seq
, "dst_mac: ");
606 for (i
= 0; i
< 6; i
++)
607 seq_printf(seq
, "%02X%s", pkt_dev
->dst_mac
[i
], i
== 5 ? "\n" : ":");
609 seq_printf(seq
, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
610 pkt_dev
->udp_src_min
, pkt_dev
->udp_src_max
, pkt_dev
->udp_dst_min
,
611 pkt_dev
->udp_dst_max
);
613 seq_printf(seq
, " src_mac_count: %d dst_mac_count: %d \n Flags: ",
614 pkt_dev
->src_mac_count
, pkt_dev
->dst_mac_count
);
617 if (pkt_dev
->flags
& F_IPV6
)
618 seq_printf(seq
, "IPV6 ");
620 if (pkt_dev
->flags
& F_IPSRC_RND
)
621 seq_printf(seq
, "IPSRC_RND ");
623 if (pkt_dev
->flags
& F_IPDST_RND
)
624 seq_printf(seq
, "IPDST_RND ");
626 if (pkt_dev
->flags
& F_TXSIZE_RND
)
627 seq_printf(seq
, "TXSIZE_RND ");
629 if (pkt_dev
->flags
& F_UDPSRC_RND
)
630 seq_printf(seq
, "UDPSRC_RND ");
632 if (pkt_dev
->flags
& F_UDPDST_RND
)
633 seq_printf(seq
, "UDPDST_RND ");
635 if (pkt_dev
->flags
& F_MACSRC_RND
)
636 seq_printf(seq
, "MACSRC_RND ");
638 if (pkt_dev
->flags
& F_MACDST_RND
)
639 seq_printf(seq
, "MACDST_RND ");
644 sa
= pkt_dev
->started_at
;
645 stopped
= pkt_dev
->stopped_at
;
646 if (pkt_dev
->running
)
647 stopped
= now
; /* not really stopped, more like last-running-at */
649 seq_printf(seq
, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
650 (unsigned long long) pkt_dev
->sofar
,
651 (unsigned long long) pkt_dev
->errors
,
652 (unsigned long long) sa
,
653 (unsigned long long) stopped
,
654 (unsigned long long) pkt_dev
->idle_acc
);
656 seq_printf(seq
, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
657 pkt_dev
->seq_num
, pkt_dev
->cur_dst_mac_offset
,
658 pkt_dev
->cur_src_mac_offset
);
660 if(pkt_dev
->flags
& F_IPV6
) {
661 char b1
[128], b2
[128];
662 fmt_ip6(b1
, pkt_dev
->cur_in6_daddr
.s6_addr
);
663 fmt_ip6(b2
, pkt_dev
->cur_in6_saddr
.s6_addr
);
664 seq_printf(seq
, " cur_saddr: %s cur_daddr: %s\n", b2
, b1
);
667 seq_printf(seq
, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
668 pkt_dev
->cur_saddr
, pkt_dev
->cur_daddr
);
671 seq_printf(seq
, " cur_udp_dst: %d cur_udp_src: %d\n",
672 pkt_dev
->cur_udp_dst
, pkt_dev
->cur_udp_src
);
674 seq_printf(seq
, " flows: %u\n", pkt_dev
->nflows
);
676 if (pkt_dev
->result
[0])
677 seq_printf(seq
, "Result: %s\n", pkt_dev
->result
);
679 seq_printf(seq
, "Result: Idle\n");
685 static int count_trail_chars(const char __user
*user_buffer
, unsigned int maxlen
)
689 for (i
= 0; i
< maxlen
; i
++) {
691 if (get_user(c
, &user_buffer
[i
]))
709 static unsigned long num_arg(const char __user
*user_buffer
, unsigned long maxlen
,
715 for(; i
< maxlen
; i
++) {
717 if (get_user(c
, &user_buffer
[i
]))
719 if ((c
>= '0') && (c
<= '9')) {
728 static int strn_len(const char __user
*user_buffer
, unsigned int maxlen
)
732 for(; i
< maxlen
; i
++) {
734 if (get_user(c
, &user_buffer
[i
]))
753 static ssize_t
pktgen_if_write(struct file
*file
, const char __user
*user_buffer
,
754 size_t count
, loff_t
*offset
)
756 struct seq_file
*seq
= (struct seq_file
*) file
->private_data
;
757 struct pktgen_dev
*pkt_dev
= seq
->private;
759 char name
[16], valstr
[32];
760 unsigned long value
= 0;
761 char* pg_result
= NULL
;
765 pg_result
= &(pkt_dev
->result
[0]);
768 printk("pktgen: wrong command format\n");
773 tmp
= count_trail_chars(&user_buffer
[i
], max
);
775 printk("pktgen: illegal format\n");
780 /* Read variable name */
782 len
= strn_len(&user_buffer
[i
], sizeof(name
) - 1);
783 if (len
< 0) { return len
; }
784 memset(name
, 0, sizeof(name
));
785 if (copy_from_user(name
, &user_buffer
[i
], len
) )
790 len
= count_trail_chars(&user_buffer
[i
], max
);
798 if (copy_from_user(tb
, user_buffer
, count
))
801 printk("pktgen: %s,%lu buffer -:%s:-\n", name
,
802 (unsigned long) count
, tb
);
805 if (!strcmp(name
, "min_pkt_size")) {
806 len
= num_arg(&user_buffer
[i
], 10, &value
);
807 if (len
< 0) { return len
; }
811 if (value
!= pkt_dev
->min_pkt_size
) {
812 pkt_dev
->min_pkt_size
= value
;
813 pkt_dev
->cur_pkt_size
= value
;
815 sprintf(pg_result
, "OK: min_pkt_size=%u", pkt_dev
->min_pkt_size
);
819 if (!strcmp(name
, "max_pkt_size")) {
820 len
= num_arg(&user_buffer
[i
], 10, &value
);
821 if (len
< 0) { return len
; }
825 if (value
!= pkt_dev
->max_pkt_size
) {
826 pkt_dev
->max_pkt_size
= value
;
827 pkt_dev
->cur_pkt_size
= value
;
829 sprintf(pg_result
, "OK: max_pkt_size=%u", pkt_dev
->max_pkt_size
);
833 /* Shortcut for min = max */
835 if (!strcmp(name
, "pkt_size")) {
836 len
= num_arg(&user_buffer
[i
], 10, &value
);
837 if (len
< 0) { return len
; }
841 if (value
!= pkt_dev
->min_pkt_size
) {
842 pkt_dev
->min_pkt_size
= value
;
843 pkt_dev
->max_pkt_size
= value
;
844 pkt_dev
->cur_pkt_size
= value
;
846 sprintf(pg_result
, "OK: pkt_size=%u", pkt_dev
->min_pkt_size
);
850 if (!strcmp(name
, "debug")) {
851 len
= num_arg(&user_buffer
[i
], 10, &value
);
852 if (len
< 0) { return len
; }
855 sprintf(pg_result
, "OK: debug=%u", debug
);
859 if (!strcmp(name
, "frags")) {
860 len
= num_arg(&user_buffer
[i
], 10, &value
);
861 if (len
< 0) { return len
; }
863 pkt_dev
->nfrags
= value
;
864 sprintf(pg_result
, "OK: frags=%u", pkt_dev
->nfrags
);
867 if (!strcmp(name
, "delay")) {
868 len
= num_arg(&user_buffer
[i
], 10, &value
);
869 if (len
< 0) { return len
; }
871 if (value
== 0x7FFFFFFF) {
872 pkt_dev
->delay_us
= 0x7FFFFFFF;
873 pkt_dev
->delay_ns
= 0;
875 pkt_dev
->delay_us
= value
/ 1000;
876 pkt_dev
->delay_ns
= value
% 1000;
878 sprintf(pg_result
, "OK: delay=%u", 1000*pkt_dev
->delay_us
+pkt_dev
->delay_ns
);
881 if (!strcmp(name
, "udp_src_min")) {
882 len
= num_arg(&user_buffer
[i
], 10, &value
);
883 if (len
< 0) { return len
; }
885 if (value
!= pkt_dev
->udp_src_min
) {
886 pkt_dev
->udp_src_min
= value
;
887 pkt_dev
->cur_udp_src
= value
;
889 sprintf(pg_result
, "OK: udp_src_min=%u", pkt_dev
->udp_src_min
);
892 if (!strcmp(name
, "udp_dst_min")) {
893 len
= num_arg(&user_buffer
[i
], 10, &value
);
894 if (len
< 0) { return len
; }
896 if (value
!= pkt_dev
->udp_dst_min
) {
897 pkt_dev
->udp_dst_min
= value
;
898 pkt_dev
->cur_udp_dst
= value
;
900 sprintf(pg_result
, "OK: udp_dst_min=%u", pkt_dev
->udp_dst_min
);
903 if (!strcmp(name
, "udp_src_max")) {
904 len
= num_arg(&user_buffer
[i
], 10, &value
);
905 if (len
< 0) { return len
; }
907 if (value
!= pkt_dev
->udp_src_max
) {
908 pkt_dev
->udp_src_max
= value
;
909 pkt_dev
->cur_udp_src
= value
;
911 sprintf(pg_result
, "OK: udp_src_max=%u", pkt_dev
->udp_src_max
);
914 if (!strcmp(name
, "udp_dst_max")) {
915 len
= num_arg(&user_buffer
[i
], 10, &value
);
916 if (len
< 0) { return len
; }
918 if (value
!= pkt_dev
->udp_dst_max
) {
919 pkt_dev
->udp_dst_max
= value
;
920 pkt_dev
->cur_udp_dst
= value
;
922 sprintf(pg_result
, "OK: udp_dst_max=%u", pkt_dev
->udp_dst_max
);
925 if (!strcmp(name
, "clone_skb")) {
926 len
= num_arg(&user_buffer
[i
], 10, &value
);
927 if (len
< 0) { return len
; }
929 pkt_dev
->clone_skb
= value
;
931 sprintf(pg_result
, "OK: clone_skb=%d", pkt_dev
->clone_skb
);
934 if (!strcmp(name
, "count")) {
935 len
= num_arg(&user_buffer
[i
], 10, &value
);
936 if (len
< 0) { return len
; }
938 pkt_dev
->count
= value
;
939 sprintf(pg_result
, "OK: count=%llu",
940 (unsigned long long) pkt_dev
->count
);
943 if (!strcmp(name
, "src_mac_count")) {
944 len
= num_arg(&user_buffer
[i
], 10, &value
);
945 if (len
< 0) { return len
; }
947 if (pkt_dev
->src_mac_count
!= value
) {
948 pkt_dev
->src_mac_count
= value
;
949 pkt_dev
->cur_src_mac_offset
= 0;
951 sprintf(pg_result
, "OK: src_mac_count=%d", pkt_dev
->src_mac_count
);
954 if (!strcmp(name
, "dst_mac_count")) {
955 len
= num_arg(&user_buffer
[i
], 10, &value
);
956 if (len
< 0) { return len
; }
958 if (pkt_dev
->dst_mac_count
!= value
) {
959 pkt_dev
->dst_mac_count
= value
;
960 pkt_dev
->cur_dst_mac_offset
= 0;
962 sprintf(pg_result
, "OK: dst_mac_count=%d", pkt_dev
->dst_mac_count
);
965 if (!strcmp(name
, "flag")) {
968 len
= strn_len(&user_buffer
[i
], sizeof(f
) - 1);
969 if (len
< 0) { return len
; }
970 if (copy_from_user(f
, &user_buffer
[i
], len
))
973 if (strcmp(f
, "IPSRC_RND") == 0)
974 pkt_dev
->flags
|= F_IPSRC_RND
;
976 else if (strcmp(f
, "!IPSRC_RND") == 0)
977 pkt_dev
->flags
&= ~F_IPSRC_RND
;
979 else if (strcmp(f
, "TXSIZE_RND") == 0)
980 pkt_dev
->flags
|= F_TXSIZE_RND
;
982 else if (strcmp(f
, "!TXSIZE_RND") == 0)
983 pkt_dev
->flags
&= ~F_TXSIZE_RND
;
985 else if (strcmp(f
, "IPDST_RND") == 0)
986 pkt_dev
->flags
|= F_IPDST_RND
;
988 else if (strcmp(f
, "!IPDST_RND") == 0)
989 pkt_dev
->flags
&= ~F_IPDST_RND
;
991 else if (strcmp(f
, "UDPSRC_RND") == 0)
992 pkt_dev
->flags
|= F_UDPSRC_RND
;
994 else if (strcmp(f
, "!UDPSRC_RND") == 0)
995 pkt_dev
->flags
&= ~F_UDPSRC_RND
;
997 else if (strcmp(f
, "UDPDST_RND") == 0)
998 pkt_dev
->flags
|= F_UDPDST_RND
;
1000 else if (strcmp(f
, "!UDPDST_RND") == 0)
1001 pkt_dev
->flags
&= ~F_UDPDST_RND
;
1003 else if (strcmp(f
, "MACSRC_RND") == 0)
1004 pkt_dev
->flags
|= F_MACSRC_RND
;
1006 else if (strcmp(f
, "!MACSRC_RND") == 0)
1007 pkt_dev
->flags
&= ~F_MACSRC_RND
;
1009 else if (strcmp(f
, "MACDST_RND") == 0)
1010 pkt_dev
->flags
|= F_MACDST_RND
;
1012 else if (strcmp(f
, "!MACDST_RND") == 0)
1013 pkt_dev
->flags
&= ~F_MACDST_RND
;
1016 sprintf(pg_result
, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1018 "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1021 sprintf(pg_result
, "OK: flags=0x%x", pkt_dev
->flags
);
1024 if (!strcmp(name
, "dst_min") || !strcmp(name
, "dst")) {
1025 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->dst_min
) - 1);
1026 if (len
< 0) { return len
; }
1028 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1031 if (strcmp(buf
, pkt_dev
->dst_min
) != 0) {
1032 memset(pkt_dev
->dst_min
, 0, sizeof(pkt_dev
->dst_min
));
1033 strncpy(pkt_dev
->dst_min
, buf
, len
);
1034 pkt_dev
->daddr_min
= in_aton(pkt_dev
->dst_min
);
1035 pkt_dev
->cur_daddr
= pkt_dev
->daddr_min
;
1038 printk("pktgen: dst_min set to: %s\n", pkt_dev
->dst_min
);
1040 sprintf(pg_result
, "OK: dst_min=%s", pkt_dev
->dst_min
);
1043 if (!strcmp(name
, "dst_max")) {
1044 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->dst_max
) - 1);
1045 if (len
< 0) { return len
; }
1047 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1051 if (strcmp(buf
, pkt_dev
->dst_max
) != 0) {
1052 memset(pkt_dev
->dst_max
, 0, sizeof(pkt_dev
->dst_max
));
1053 strncpy(pkt_dev
->dst_max
, buf
, len
);
1054 pkt_dev
->daddr_max
= in_aton(pkt_dev
->dst_max
);
1055 pkt_dev
->cur_daddr
= pkt_dev
->daddr_max
;
1058 printk("pktgen: dst_max set to: %s\n", pkt_dev
->dst_max
);
1060 sprintf(pg_result
, "OK: dst_max=%s", pkt_dev
->dst_max
);
1063 if (!strcmp(name
, "dst6")) {
1064 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1065 if (len
< 0) return len
;
1067 pkt_dev
->flags
|= F_IPV6
;
1069 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1073 scan_ip6(buf
, pkt_dev
->in6_daddr
.s6_addr
);
1074 fmt_ip6(buf
, pkt_dev
->in6_daddr
.s6_addr
);
1076 ipv6_addr_copy(&pkt_dev
->cur_in6_daddr
, &pkt_dev
->in6_daddr
);
1079 printk("pktgen: dst6 set to: %s\n", buf
);
1082 sprintf(pg_result
, "OK: dst6=%s", buf
);
1085 if (!strcmp(name
, "dst6_min")) {
1086 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1087 if (len
< 0) return len
;
1089 pkt_dev
->flags
|= F_IPV6
;
1091 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1095 scan_ip6(buf
, pkt_dev
->min_in6_daddr
.s6_addr
);
1096 fmt_ip6(buf
, pkt_dev
->min_in6_daddr
.s6_addr
);
1098 ipv6_addr_copy(&pkt_dev
->cur_in6_daddr
, &pkt_dev
->min_in6_daddr
);
1100 printk("pktgen: dst6_min set to: %s\n", buf
);
1103 sprintf(pg_result
, "OK: dst6_min=%s", buf
);
1106 if (!strcmp(name
, "dst6_max")) {
1107 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1108 if (len
< 0) return len
;
1110 pkt_dev
->flags
|= F_IPV6
;
1112 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1116 scan_ip6(buf
, pkt_dev
->max_in6_daddr
.s6_addr
);
1117 fmt_ip6(buf
, pkt_dev
->max_in6_daddr
.s6_addr
);
1120 printk("pktgen: dst6_max set to: %s\n", buf
);
1123 sprintf(pg_result
, "OK: dst6_max=%s", buf
);
1126 if (!strcmp(name
, "src6")) {
1127 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1128 if (len
< 0) return len
;
1130 pkt_dev
->flags
|= F_IPV6
;
1132 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1136 scan_ip6(buf
, pkt_dev
->in6_saddr
.s6_addr
);
1137 fmt_ip6(buf
, pkt_dev
->in6_saddr
.s6_addr
);
1139 ipv6_addr_copy(&pkt_dev
->cur_in6_saddr
, &pkt_dev
->in6_saddr
);
1142 printk("pktgen: src6 set to: %s\n", buf
);
1145 sprintf(pg_result
, "OK: src6=%s", buf
);
1148 if (!strcmp(name
, "src_min")) {
1149 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->src_min
) - 1);
1150 if (len
< 0) { return len
; }
1151 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1154 if (strcmp(buf
, pkt_dev
->src_min
) != 0) {
1155 memset(pkt_dev
->src_min
, 0, sizeof(pkt_dev
->src_min
));
1156 strncpy(pkt_dev
->src_min
, buf
, len
);
1157 pkt_dev
->saddr_min
= in_aton(pkt_dev
->src_min
);
1158 pkt_dev
->cur_saddr
= pkt_dev
->saddr_min
;
1161 printk("pktgen: src_min set to: %s\n", pkt_dev
->src_min
);
1163 sprintf(pg_result
, "OK: src_min=%s", pkt_dev
->src_min
);
1166 if (!strcmp(name
, "src_max")) {
1167 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->src_max
) - 1);
1168 if (len
< 0) { return len
; }
1169 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1172 if (strcmp(buf
, pkt_dev
->src_max
) != 0) {
1173 memset(pkt_dev
->src_max
, 0, sizeof(pkt_dev
->src_max
));
1174 strncpy(pkt_dev
->src_max
, buf
, len
);
1175 pkt_dev
->saddr_max
= in_aton(pkt_dev
->src_max
);
1176 pkt_dev
->cur_saddr
= pkt_dev
->saddr_max
;
1179 printk("pktgen: src_max set to: %s\n", pkt_dev
->src_max
);
1181 sprintf(pg_result
, "OK: src_max=%s", pkt_dev
->src_max
);
1184 if (!strcmp(name
, "dst_mac")) {
1186 unsigned char old_dmac
[ETH_ALEN
];
1187 unsigned char *m
= pkt_dev
->dst_mac
;
1188 memcpy(old_dmac
, pkt_dev
->dst_mac
, ETH_ALEN
);
1190 len
= strn_len(&user_buffer
[i
], sizeof(valstr
) - 1);
1191 if (len
< 0) { return len
; }
1192 memset(valstr
, 0, sizeof(valstr
));
1193 if( copy_from_user(valstr
, &user_buffer
[i
], len
))
1197 for(*m
= 0;*v
&& m
< pkt_dev
->dst_mac
+ 6; v
++) {
1198 if (*v
>= '0' && *v
<= '9') {
1202 if (*v
>= 'A' && *v
<= 'F') {
1204 *m
+= *v
- 'A' + 10;
1206 if (*v
>= 'a' && *v
<= 'f') {
1208 *m
+= *v
- 'a' + 10;
1216 /* Set up Dest MAC */
1217 if (compare_ether_addr(old_dmac
, pkt_dev
->dst_mac
))
1218 memcpy(&(pkt_dev
->hh
[0]), pkt_dev
->dst_mac
, ETH_ALEN
);
1220 sprintf(pg_result
, "OK: dstmac");
1223 if (!strcmp(name
, "src_mac")) {
1225 unsigned char *m
= pkt_dev
->src_mac
;
1227 len
= strn_len(&user_buffer
[i
], sizeof(valstr
) - 1);
1228 if (len
< 0) { return len
; }
1229 memset(valstr
, 0, sizeof(valstr
));
1230 if( copy_from_user(valstr
, &user_buffer
[i
], len
))
1234 for(*m
= 0;*v
&& m
< pkt_dev
->src_mac
+ 6; v
++) {
1235 if (*v
>= '0' && *v
<= '9') {
1239 if (*v
>= 'A' && *v
<= 'F') {
1241 *m
+= *v
- 'A' + 10;
1243 if (*v
>= 'a' && *v
<= 'f') {
1245 *m
+= *v
- 'a' + 10;
1253 sprintf(pg_result
, "OK: srcmac");
1257 if (!strcmp(name
, "clear_counters")) {
1258 pktgen_clear_counters(pkt_dev
);
1259 sprintf(pg_result
, "OK: Clearing counters.\n");
1263 if (!strcmp(name
, "flows")) {
1264 len
= num_arg(&user_buffer
[i
], 10, &value
);
1265 if (len
< 0) { return len
; }
1267 if (value
> MAX_CFLOWS
)
1270 pkt_dev
->cflows
= value
;
1271 sprintf(pg_result
, "OK: flows=%u", pkt_dev
->cflows
);
1275 if (!strcmp(name
, "flowlen")) {
1276 len
= num_arg(&user_buffer
[i
], 10, &value
);
1277 if (len
< 0) { return len
; }
1279 pkt_dev
->lflow
= value
;
1280 sprintf(pg_result
, "OK: flowlen=%u", pkt_dev
->lflow
);
1284 sprintf(pkt_dev
->result
, "No such parameter \"%s\"", name
);
1288 static int pktgen_if_open(struct inode
*inode
, struct file
*file
)
1290 return single_open(file
, pktgen_if_show
, PDE(inode
)->data
);
1293 static struct file_operations pktgen_if_fops
= {
1294 .owner
= THIS_MODULE
,
1295 .open
= pktgen_if_open
,
1297 .llseek
= seq_lseek
,
1298 .write
= pktgen_if_write
,
1299 .release
= single_release
,
1302 static int pktgen_thread_show(struct seq_file
*seq
, void *v
)
1304 struct pktgen_thread
*t
= seq
->private;
1305 struct pktgen_dev
*pkt_dev
= NULL
;
1309 seq_printf(seq
, "Name: %s max_before_softirq: %d\n",
1310 t
->name
, t
->max_before_softirq
);
1312 seq_printf(seq
, "Running: ");
1315 for(pkt_dev
= t
->if_list
;pkt_dev
; pkt_dev
= pkt_dev
->next
)
1316 if(pkt_dev
->running
)
1317 seq_printf(seq
, "%s ", pkt_dev
->ifname
);
1319 seq_printf(seq
, "\nStopped: ");
1321 for(pkt_dev
= t
->if_list
;pkt_dev
; pkt_dev
= pkt_dev
->next
)
1322 if(!pkt_dev
->running
)
1323 seq_printf(seq
, "%s ", pkt_dev
->ifname
);
1326 seq_printf(seq
, "\nResult: %s\n", t
->result
);
1328 seq_printf(seq
, "\nResult: NA\n");
1335 static ssize_t
pktgen_thread_write(struct file
*file
,
1336 const char __user
*user_buffer
,
1337 size_t count
, loff_t
*offset
)
1339 struct seq_file
*seq
= (struct seq_file
*) file
->private_data
;
1340 struct pktgen_thread
*t
= seq
->private;
1341 int i
= 0, max
, len
, ret
;
1344 unsigned long value
= 0;
1347 // sprintf(pg_result, "Wrong command format");
1352 len
= count_trail_chars(&user_buffer
[i
], max
);
1358 /* Read variable name */
1360 len
= strn_len(&user_buffer
[i
], sizeof(name
) - 1);
1364 memset(name
, 0, sizeof(name
));
1365 if (copy_from_user(name
, &user_buffer
[i
], len
))
1370 len
= count_trail_chars(&user_buffer
[i
], max
);
1377 printk("pktgen: t=%s, count=%lu\n", name
,
1378 (unsigned long) count
);
1381 printk("pktgen: ERROR: No thread\n");
1386 pg_result
= &(t
->result
[0]);
1388 if (!strcmp(name
, "add_device")) {
1391 len
= strn_len(&user_buffer
[i
], sizeof(f
) - 1);
1396 if( copy_from_user(f
, &user_buffer
[i
], len
) )
1400 pktgen_add_device(t
, f
);
1403 sprintf(pg_result
, "OK: add_device=%s", f
);
1407 if (!strcmp(name
, "rem_device_all")) {
1409 t
->control
|= T_REMDEV
;
1411 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1413 sprintf(pg_result
, "OK: rem_device_all");
1417 if (!strcmp(name
, "max_before_softirq")) {
1418 len
= num_arg(&user_buffer
[i
], 10, &value
);
1420 t
->max_before_softirq
= value
;
1423 sprintf(pg_result
, "OK: max_before_softirq=%lu", value
);
1433 static int pktgen_thread_open(struct inode
*inode
, struct file
*file
)
1435 return single_open(file
, pktgen_thread_show
, PDE(inode
)->data
);
1438 static struct file_operations pktgen_thread_fops
= {
1439 .owner
= THIS_MODULE
,
1440 .open
= pktgen_thread_open
,
1442 .llseek
= seq_lseek
,
1443 .write
= pktgen_thread_write
,
1444 .release
= single_release
,
1447 /* Think find or remove for NN */
1448 static struct pktgen_dev
*__pktgen_NN_threads(const char* ifname
, int remove
)
1450 struct pktgen_thread
*t
;
1451 struct pktgen_dev
*pkt_dev
= NULL
;
1456 pkt_dev
= pktgen_find_dev(t
, ifname
);
1460 pktgen_remove_device(t
, pkt_dev
);
1470 static struct pktgen_dev
*pktgen_NN_threads(const char* ifname
, int remove
)
1472 struct pktgen_dev
*pkt_dev
= NULL
;
1474 pkt_dev
= __pktgen_NN_threads(ifname
, remove
);
1479 static int pktgen_device_event(struct notifier_block
*unused
, unsigned long event
, void *ptr
)
1481 struct net_device
*dev
= (struct net_device
*)(ptr
);
1483 /* It is OK that we do not hold the group lock right now,
1484 * as we run under the RTNL lock.
1488 case NETDEV_CHANGEADDR
:
1489 case NETDEV_GOING_DOWN
:
1492 /* Ignore for now */
1495 case NETDEV_UNREGISTER
:
1496 pktgen_NN_threads(dev
->name
, REMOVE
);
1503 /* Associate pktgen_dev with a device. */
1505 static struct net_device
* pktgen_setup_dev(struct pktgen_dev
*pkt_dev
) {
1506 struct net_device
*odev
;
1508 /* Clean old setups */
1510 if (pkt_dev
->odev
) {
1511 dev_put(pkt_dev
->odev
);
1512 pkt_dev
->odev
= NULL
;
1515 odev
= dev_get_by_name(pkt_dev
->ifname
);
1518 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev
->ifname
);
1521 if (odev
->type
!= ARPHRD_ETHER
) {
1522 printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev
->ifname
);
1525 if (!netif_running(odev
)) {
1526 printk("pktgen: device is down: \"%s\"\n", pkt_dev
->ifname
);
1529 pkt_dev
->odev
= odev
;
1531 return pkt_dev
->odev
;
1540 /* Read pkt_dev from the interface and set up internal pktgen_dev
1541 * structure to have the right information to create/send packets
1543 static void pktgen_setup_inject(struct pktgen_dev
*pkt_dev
)
1545 /* Try once more, just in case it works now. */
1547 pktgen_setup_dev(pkt_dev
);
1549 if (!pkt_dev
->odev
) {
1550 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1551 sprintf(pkt_dev
->result
, "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1555 /* Default to the interface's mac if not explicitly set. */
1557 if (is_zero_ether_addr(pkt_dev
->src_mac
))
1558 memcpy(&(pkt_dev
->hh
[6]), pkt_dev
->odev
->dev_addr
, ETH_ALEN
);
1560 /* Set up Dest MAC */
1561 memcpy(&(pkt_dev
->hh
[0]), pkt_dev
->dst_mac
, ETH_ALEN
);
1563 /* Set up pkt size */
1564 pkt_dev
->cur_pkt_size
= pkt_dev
->min_pkt_size
;
1566 if(pkt_dev
->flags
& F_IPV6
) {
1568 * Skip this automatic address setting until locks or functions
1573 int i
, set
= 0, err
=1;
1574 struct inet6_dev
*idev
;
1576 for(i
=0; i
< IN6_ADDR_HSIZE
; i
++)
1577 if(pkt_dev
->cur_in6_saddr
.s6_addr
[i
]) {
1585 * Use linklevel address if unconfigured.
1587 * use ipv6_get_lladdr if/when it's get exported
1591 read_lock(&addrconf_lock
);
1592 if ((idev
= __in6_dev_get(pkt_dev
->odev
)) != NULL
) {
1593 struct inet6_ifaddr
*ifp
;
1595 read_lock_bh(&idev
->lock
);
1596 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1597 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1598 ipv6_addr_copy(&pkt_dev
->cur_in6_saddr
, &ifp
->addr
);
1603 read_unlock_bh(&idev
->lock
);
1605 read_unlock(&addrconf_lock
);
1606 if(err
) printk("pktgen: ERROR: IPv6 link address not availble.\n");
1611 pkt_dev
->saddr_min
= 0;
1612 pkt_dev
->saddr_max
= 0;
1613 if (strlen(pkt_dev
->src_min
) == 0) {
1615 struct in_device
*in_dev
;
1618 in_dev
= __in_dev_get_rcu(pkt_dev
->odev
);
1620 if (in_dev
->ifa_list
) {
1621 pkt_dev
->saddr_min
= in_dev
->ifa_list
->ifa_address
;
1622 pkt_dev
->saddr_max
= pkt_dev
->saddr_min
;
1628 pkt_dev
->saddr_min
= in_aton(pkt_dev
->src_min
);
1629 pkt_dev
->saddr_max
= in_aton(pkt_dev
->src_max
);
1632 pkt_dev
->daddr_min
= in_aton(pkt_dev
->dst_min
);
1633 pkt_dev
->daddr_max
= in_aton(pkt_dev
->dst_max
);
1635 /* Initialize current values. */
1636 pkt_dev
->cur_dst_mac_offset
= 0;
1637 pkt_dev
->cur_src_mac_offset
= 0;
1638 pkt_dev
->cur_saddr
= pkt_dev
->saddr_min
;
1639 pkt_dev
->cur_daddr
= pkt_dev
->daddr_min
;
1640 pkt_dev
->cur_udp_dst
= pkt_dev
->udp_dst_min
;
1641 pkt_dev
->cur_udp_src
= pkt_dev
->udp_src_min
;
1642 pkt_dev
->nflows
= 0;
1645 static void spin(struct pktgen_dev
*pkt_dev
, __u64 spin_until_us
)
1650 start
= now
= getCurUs();
1651 printk(KERN_INFO
"sleeping for %d\n", (int)(spin_until_us
- now
));
1652 while (now
< spin_until_us
) {
1653 /* TODO: optimize sleeping behavior */
1654 if (spin_until_us
- now
> jiffies_to_usecs(1)+1)
1655 schedule_timeout_interruptible(1);
1656 else if (spin_until_us
- now
> 100) {
1658 if (!pkt_dev
->running
)
1667 pkt_dev
->idle_acc
+= now
- start
;
1671 /* Increment/randomize headers according to flags and current values
1672 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
1674 static void mod_cur_headers(struct pktgen_dev
*pkt_dev
) {
1679 if(pkt_dev
->cflows
) {
1680 flow
= pktgen_random() % pkt_dev
->cflows
;
1682 if (pkt_dev
->flows
[flow
].count
> pkt_dev
->lflow
)
1683 pkt_dev
->flows
[flow
].count
= 0;
1687 /* Deal with source MAC */
1688 if (pkt_dev
->src_mac_count
> 1) {
1692 if (pkt_dev
->flags
& F_MACSRC_RND
)
1693 mc
= pktgen_random() % (pkt_dev
->src_mac_count
);
1695 mc
= pkt_dev
->cur_src_mac_offset
++;
1696 if (pkt_dev
->cur_src_mac_offset
> pkt_dev
->src_mac_count
)
1697 pkt_dev
->cur_src_mac_offset
= 0;
1700 tmp
= pkt_dev
->src_mac
[5] + (mc
& 0xFF);
1701 pkt_dev
->hh
[11] = tmp
;
1702 tmp
= (pkt_dev
->src_mac
[4] + ((mc
>> 8) & 0xFF) + (tmp
>> 8));
1703 pkt_dev
->hh
[10] = tmp
;
1704 tmp
= (pkt_dev
->src_mac
[3] + ((mc
>> 16) & 0xFF) + (tmp
>> 8));
1705 pkt_dev
->hh
[9] = tmp
;
1706 tmp
= (pkt_dev
->src_mac
[2] + ((mc
>> 24) & 0xFF) + (tmp
>> 8));
1707 pkt_dev
->hh
[8] = tmp
;
1708 tmp
= (pkt_dev
->src_mac
[1] + (tmp
>> 8));
1709 pkt_dev
->hh
[7] = tmp
;
1712 /* Deal with Destination MAC */
1713 if (pkt_dev
->dst_mac_count
> 1) {
1717 if (pkt_dev
->flags
& F_MACDST_RND
)
1718 mc
= pktgen_random() % (pkt_dev
->dst_mac_count
);
1721 mc
= pkt_dev
->cur_dst_mac_offset
++;
1722 if (pkt_dev
->cur_dst_mac_offset
> pkt_dev
->dst_mac_count
) {
1723 pkt_dev
->cur_dst_mac_offset
= 0;
1727 tmp
= pkt_dev
->dst_mac
[5] + (mc
& 0xFF);
1728 pkt_dev
->hh
[5] = tmp
;
1729 tmp
= (pkt_dev
->dst_mac
[4] + ((mc
>> 8) & 0xFF) + (tmp
>> 8));
1730 pkt_dev
->hh
[4] = tmp
;
1731 tmp
= (pkt_dev
->dst_mac
[3] + ((mc
>> 16) & 0xFF) + (tmp
>> 8));
1732 pkt_dev
->hh
[3] = tmp
;
1733 tmp
= (pkt_dev
->dst_mac
[2] + ((mc
>> 24) & 0xFF) + (tmp
>> 8));
1734 pkt_dev
->hh
[2] = tmp
;
1735 tmp
= (pkt_dev
->dst_mac
[1] + (tmp
>> 8));
1736 pkt_dev
->hh
[1] = tmp
;
1739 if (pkt_dev
->udp_src_min
< pkt_dev
->udp_src_max
) {
1740 if (pkt_dev
->flags
& F_UDPSRC_RND
)
1741 pkt_dev
->cur_udp_src
= ((pktgen_random() % (pkt_dev
->udp_src_max
- pkt_dev
->udp_src_min
)) + pkt_dev
->udp_src_min
);
1744 pkt_dev
->cur_udp_src
++;
1745 if (pkt_dev
->cur_udp_src
>= pkt_dev
->udp_src_max
)
1746 pkt_dev
->cur_udp_src
= pkt_dev
->udp_src_min
;
1750 if (pkt_dev
->udp_dst_min
< pkt_dev
->udp_dst_max
) {
1751 if (pkt_dev
->flags
& F_UDPDST_RND
) {
1752 pkt_dev
->cur_udp_dst
= ((pktgen_random() % (pkt_dev
->udp_dst_max
- pkt_dev
->udp_dst_min
)) + pkt_dev
->udp_dst_min
);
1755 pkt_dev
->cur_udp_dst
++;
1756 if (pkt_dev
->cur_udp_dst
>= pkt_dev
->udp_dst_max
)
1757 pkt_dev
->cur_udp_dst
= pkt_dev
->udp_dst_min
;
1761 if (!(pkt_dev
->flags
& F_IPV6
)) {
1763 if ((imn
= ntohl(pkt_dev
->saddr_min
)) < (imx
= ntohl(pkt_dev
->saddr_max
))) {
1765 if (pkt_dev
->flags
& F_IPSRC_RND
)
1766 t
= ((pktgen_random() % (imx
- imn
)) + imn
);
1768 t
= ntohl(pkt_dev
->cur_saddr
);
1774 pkt_dev
->cur_saddr
= htonl(t
);
1777 if (pkt_dev
->cflows
&& pkt_dev
->flows
[flow
].count
!= 0) {
1778 pkt_dev
->cur_daddr
= pkt_dev
->flows
[flow
].cur_daddr
;
1781 if ((imn
= ntohl(pkt_dev
->daddr_min
)) < (imx
= ntohl(pkt_dev
->daddr_max
))) {
1783 if (pkt_dev
->flags
& F_IPDST_RND
) {
1785 t
= ((pktgen_random() % (imx
- imn
)) + imn
);
1788 while( LOOPBACK(t
) || MULTICAST(t
) || BADCLASS(t
) || ZERONET(t
) || LOCAL_MCAST(t
) ) {
1789 t
= ((pktgen_random() % (imx
- imn
)) + imn
);
1792 pkt_dev
->cur_daddr
= t
;
1796 t
= ntohl(pkt_dev
->cur_daddr
);
1801 pkt_dev
->cur_daddr
= htonl(t
);
1804 if(pkt_dev
->cflows
) {
1805 pkt_dev
->flows
[flow
].cur_daddr
= pkt_dev
->cur_daddr
;
1812 if(pkt_dev
->min_in6_daddr
.s6_addr32
[0] == 0 &&
1813 pkt_dev
->min_in6_daddr
.s6_addr32
[1] == 0 &&
1814 pkt_dev
->min_in6_daddr
.s6_addr32
[2] == 0 &&
1815 pkt_dev
->min_in6_daddr
.s6_addr32
[3] == 0);
1819 /* Only random destinations yet */
1821 for(i
=0; i
< 4; i
++) {
1822 pkt_dev
->cur_in6_daddr
.s6_addr32
[i
] =
1824 pkt_dev
->min_in6_daddr
.s6_addr32
[i
]) &
1825 pkt_dev
->max_in6_daddr
.s6_addr32
[i
]);
1830 if (pkt_dev
->min_pkt_size
< pkt_dev
->max_pkt_size
) {
1832 if (pkt_dev
->flags
& F_TXSIZE_RND
) {
1833 t
= ((pktgen_random() % (pkt_dev
->max_pkt_size
- pkt_dev
->min_pkt_size
))
1834 + pkt_dev
->min_pkt_size
);
1837 t
= pkt_dev
->cur_pkt_size
+ 1;
1838 if (t
> pkt_dev
->max_pkt_size
)
1839 t
= pkt_dev
->min_pkt_size
;
1841 pkt_dev
->cur_pkt_size
= t
;
1844 pkt_dev
->flows
[flow
].count
++;
1848 static struct sk_buff
*fill_packet_ipv4(struct net_device
*odev
,
1849 struct pktgen_dev
*pkt_dev
)
1851 struct sk_buff
*skb
= NULL
;
1853 struct udphdr
*udph
;
1856 struct pktgen_hdr
*pgh
= NULL
;
1858 /* Update any of the values, used when we're incrementing various
1861 mod_cur_headers(pkt_dev
);
1863 datalen
= (odev
->hard_header_len
+ 16) & ~0xf;
1864 skb
= alloc_skb(pkt_dev
->cur_pkt_size
+ 64 + datalen
, GFP_ATOMIC
);
1866 sprintf(pkt_dev
->result
, "No memory");
1870 skb_reserve(skb
, datalen
);
1872 /* Reserve for ethernet and IP header */
1873 eth
= (__u8
*) skb_push(skb
, 14);
1874 iph
= (struct iphdr
*)skb_put(skb
, sizeof(struct iphdr
));
1875 udph
= (struct udphdr
*)skb_put(skb
, sizeof(struct udphdr
));
1877 memcpy(eth
, pkt_dev
->hh
, 12);
1878 *(u16
*)ð
[12] = __constant_htons(ETH_P_IP
);
1880 datalen
= pkt_dev
->cur_pkt_size
- 14 - 20 - 8; /* Eth + IPh + UDPh */
1881 if (datalen
< sizeof(struct pktgen_hdr
))
1882 datalen
= sizeof(struct pktgen_hdr
);
1884 udph
->source
= htons(pkt_dev
->cur_udp_src
);
1885 udph
->dest
= htons(pkt_dev
->cur_udp_dst
);
1886 udph
->len
= htons(datalen
+ 8); /* DATA + udphdr */
1887 udph
->check
= 0; /* No checksum */
1893 iph
->protocol
= IPPROTO_UDP
; /* UDP */
1894 iph
->saddr
= pkt_dev
->cur_saddr
;
1895 iph
->daddr
= pkt_dev
->cur_daddr
;
1897 iplen
= 20 + 8 + datalen
;
1898 iph
->tot_len
= htons(iplen
);
1900 iph
->check
= ip_fast_csum((void *) iph
, iph
->ihl
);
1901 skb
->protocol
= __constant_htons(ETH_P_IP
);
1902 skb
->mac
.raw
= ((u8
*)iph
) - 14;
1904 skb
->pkt_type
= PACKET_HOST
;
1906 if (pkt_dev
->nfrags
<= 0)
1907 pgh
= (struct pktgen_hdr
*)skb_put(skb
, datalen
);
1909 int frags
= pkt_dev
->nfrags
;
1912 pgh
= (struct pktgen_hdr
*)(((char*)(udph
)) + 8);
1914 if (frags
> MAX_SKB_FRAGS
)
1915 frags
= MAX_SKB_FRAGS
;
1916 if (datalen
> frags
*PAGE_SIZE
) {
1917 skb_put(skb
, datalen
-frags
*PAGE_SIZE
);
1918 datalen
= frags
*PAGE_SIZE
;
1922 while (datalen
> 0) {
1923 struct page
*page
= alloc_pages(GFP_KERNEL
, 0);
1924 skb_shinfo(skb
)->frags
[i
].page
= page
;
1925 skb_shinfo(skb
)->frags
[i
].page_offset
= 0;
1926 skb_shinfo(skb
)->frags
[i
].size
=
1927 (datalen
< PAGE_SIZE
? datalen
: PAGE_SIZE
);
1928 datalen
-= skb_shinfo(skb
)->frags
[i
].size
;
1929 skb
->len
+= skb_shinfo(skb
)->frags
[i
].size
;
1930 skb
->data_len
+= skb_shinfo(skb
)->frags
[i
].size
;
1932 skb_shinfo(skb
)->nr_frags
= i
;
1941 rem
= skb_shinfo(skb
)->frags
[i
- 1].size
/ 2;
1945 skb_shinfo(skb
)->frags
[i
- 1].size
-= rem
;
1947 skb_shinfo(skb
)->frags
[i
] = skb_shinfo(skb
)->frags
[i
- 1];
1948 get_page(skb_shinfo(skb
)->frags
[i
].page
);
1949 skb_shinfo(skb
)->frags
[i
].page
= skb_shinfo(skb
)->frags
[i
- 1].page
;
1950 skb_shinfo(skb
)->frags
[i
].page_offset
+= skb_shinfo(skb
)->frags
[i
- 1].size
;
1951 skb_shinfo(skb
)->frags
[i
].size
= rem
;
1953 skb_shinfo(skb
)->nr_frags
= i
;
1957 /* Stamp the time, and sequence number, convert them to network byte order */
1960 struct timeval timestamp
;
1962 pgh
->pgh_magic
= htonl(PKTGEN_MAGIC
);
1963 pgh
->seq_num
= htonl(pkt_dev
->seq_num
);
1965 do_gettimeofday(×tamp
);
1966 pgh
->tv_sec
= htonl(timestamp
.tv_sec
);
1967 pgh
->tv_usec
= htonl(timestamp
.tv_usec
);
1975 * scan_ip6, fmt_ip taken from dietlibc-0.21
1976 * Author Felix von Leitner <felix-dietlibc@fefe.de>
1978 * Slightly modified for kernel.
1979 * Should be candidate for net/ipv4/utils.c
1983 static unsigned int scan_ip6(const char *s
,char ip
[16])
1989 unsigned int prefixlen
=0;
1990 unsigned int suffixlen
=0;
1993 for (i
=0; i
<16; i
++) ip
[i
]=0;
1998 if (s
[1] == ':') { /* Found "::", skip to part 2 */
2007 u
=simple_strtoul(s
,&tmp
,16);
2012 if (prefixlen
==12 && s
[i
]=='.') {
2014 /* the last 4 bytes may be written as IPv4 address */
2017 memcpy((struct in_addr
*)(ip
+12), &tmp
, sizeof(tmp
));
2020 ip
[prefixlen
++] = (u
>> 8);
2021 ip
[prefixlen
++] = (u
& 255);
2027 /* part 2, after "::" */
2034 } else if (suffixlen
!=0)
2038 u
=simple_strtol(s
,&tmp
,16);
2045 if (suffixlen
+prefixlen
<=12 && s
[i
]=='.') {
2047 memcpy((struct in_addr
*)(suffix
+suffixlen
), &tmp
, sizeof(tmp
));
2052 suffix
[suffixlen
++] = (u
>> 8);
2053 suffix
[suffixlen
++] = (u
& 255);
2055 if (prefixlen
+suffixlen
==16)
2058 for (i
=0; i
<suffixlen
; i
++)
2059 ip
[16-suffixlen
+i
] = suffix
[i
];
2063 static char tohex(char hexdigit
) {
2064 return hexdigit
>9?hexdigit
+'a'-10:hexdigit
+'0';
2067 static int fmt_xlong(char* s
,unsigned int i
) {
2069 *s
=tohex((i
>>12)&0xf); if (s
!=bak
|| *s
!='0') ++s
;
2070 *s
=tohex((i
>>8)&0xf); if (s
!=bak
|| *s
!='0') ++s
;
2071 *s
=tohex((i
>>4)&0xf); if (s
!=bak
|| *s
!='0') ++s
;
2076 static unsigned int fmt_ip6(char *s
,const char ip
[16]) {
2080 unsigned int compressing
;
2083 len
= 0; compressing
= 0;
2084 for (j
=0; j
<16; j
+=2) {
2086 #ifdef V4MAPPEDPREFIX
2087 if (j
==12 && !memcmp(ip
,V4mappedprefix
,12)) {
2088 inet_ntoa_r(*(struct in_addr
*)(ip
+12),s
);
2093 temp
= ((unsigned long) (unsigned char) ip
[j
] << 8) +
2094 (unsigned long) (unsigned char) ip
[j
+1];
2107 i
= fmt_xlong(s
,temp
); len
+= i
; s
+= i
;
2121 static struct sk_buff
*fill_packet_ipv6(struct net_device
*odev
,
2122 struct pktgen_dev
*pkt_dev
)
2124 struct sk_buff
*skb
= NULL
;
2126 struct udphdr
*udph
;
2128 struct ipv6hdr
*iph
;
2129 struct pktgen_hdr
*pgh
= NULL
;
2131 /* Update any of the values, used when we're incrementing various
2134 mod_cur_headers(pkt_dev
);
2136 skb
= alloc_skb(pkt_dev
->cur_pkt_size
+ 64 + 16, GFP_ATOMIC
);
2138 sprintf(pkt_dev
->result
, "No memory");
2142 skb_reserve(skb
, 16);
2144 /* Reserve for ethernet and IP header */
2145 eth
= (__u8
*) skb_push(skb
, 14);
2146 iph
= (struct ipv6hdr
*)skb_put(skb
, sizeof(struct ipv6hdr
));
2147 udph
= (struct udphdr
*)skb_put(skb
, sizeof(struct udphdr
));
2149 memcpy(eth
, pkt_dev
->hh
, 12);
2150 *(u16
*)ð
[12] = __constant_htons(ETH_P_IPV6
);
2152 datalen
= pkt_dev
->cur_pkt_size
-14-
2153 sizeof(struct ipv6hdr
)-sizeof(struct udphdr
); /* Eth + IPh + UDPh */
2155 if (datalen
< sizeof(struct pktgen_hdr
)) {
2156 datalen
= sizeof(struct pktgen_hdr
);
2157 if (net_ratelimit())
2158 printk(KERN_INFO
"pktgen: increased datalen to %d\n", datalen
);
2161 udph
->source
= htons(pkt_dev
->cur_udp_src
);
2162 udph
->dest
= htons(pkt_dev
->cur_udp_dst
);
2163 udph
->len
= htons(datalen
+ sizeof(struct udphdr
));
2164 udph
->check
= 0; /* No checksum */
2166 *(u32
*)iph
= __constant_htonl(0x60000000); /* Version + flow */
2168 iph
->hop_limit
= 32;
2170 iph
->payload_len
= htons(sizeof(struct udphdr
) + datalen
);
2171 iph
->nexthdr
= IPPROTO_UDP
;
2173 ipv6_addr_copy(&iph
->daddr
, &pkt_dev
->cur_in6_daddr
);
2174 ipv6_addr_copy(&iph
->saddr
, &pkt_dev
->cur_in6_saddr
);
2176 skb
->mac
.raw
= ((u8
*)iph
) - 14;
2177 skb
->protocol
= __constant_htons(ETH_P_IPV6
);
2179 skb
->pkt_type
= PACKET_HOST
;
2181 if (pkt_dev
->nfrags
<= 0)
2182 pgh
= (struct pktgen_hdr
*)skb_put(skb
, datalen
);
2184 int frags
= pkt_dev
->nfrags
;
2187 pgh
= (struct pktgen_hdr
*)(((char*)(udph
)) + 8);
2189 if (frags
> MAX_SKB_FRAGS
)
2190 frags
= MAX_SKB_FRAGS
;
2191 if (datalen
> frags
*PAGE_SIZE
) {
2192 skb_put(skb
, datalen
-frags
*PAGE_SIZE
);
2193 datalen
= frags
*PAGE_SIZE
;
2197 while (datalen
> 0) {
2198 struct page
*page
= alloc_pages(GFP_KERNEL
, 0);
2199 skb_shinfo(skb
)->frags
[i
].page
= page
;
2200 skb_shinfo(skb
)->frags
[i
].page_offset
= 0;
2201 skb_shinfo(skb
)->frags
[i
].size
=
2202 (datalen
< PAGE_SIZE
? datalen
: PAGE_SIZE
);
2203 datalen
-= skb_shinfo(skb
)->frags
[i
].size
;
2204 skb
->len
+= skb_shinfo(skb
)->frags
[i
].size
;
2205 skb
->data_len
+= skb_shinfo(skb
)->frags
[i
].size
;
2207 skb_shinfo(skb
)->nr_frags
= i
;
2216 rem
= skb_shinfo(skb
)->frags
[i
- 1].size
/ 2;
2220 skb_shinfo(skb
)->frags
[i
- 1].size
-= rem
;
2222 skb_shinfo(skb
)->frags
[i
] = skb_shinfo(skb
)->frags
[i
- 1];
2223 get_page(skb_shinfo(skb
)->frags
[i
].page
);
2224 skb_shinfo(skb
)->frags
[i
].page
= skb_shinfo(skb
)->frags
[i
- 1].page
;
2225 skb_shinfo(skb
)->frags
[i
].page_offset
+= skb_shinfo(skb
)->frags
[i
- 1].size
;
2226 skb_shinfo(skb
)->frags
[i
].size
= rem
;
2228 skb_shinfo(skb
)->nr_frags
= i
;
2232 /* Stamp the time, and sequence number, convert them to network byte order */
2233 /* should we update cloned packets too ? */
2235 struct timeval timestamp
;
2237 pgh
->pgh_magic
= htonl(PKTGEN_MAGIC
);
2238 pgh
->seq_num
= htonl(pkt_dev
->seq_num
);
2240 do_gettimeofday(×tamp
);
2241 pgh
->tv_sec
= htonl(timestamp
.tv_sec
);
2242 pgh
->tv_usec
= htonl(timestamp
.tv_usec
);
2249 static inline struct sk_buff
*fill_packet(struct net_device
*odev
,
2250 struct pktgen_dev
*pkt_dev
)
2252 if(pkt_dev
->flags
& F_IPV6
)
2253 return fill_packet_ipv6(odev
, pkt_dev
);
2255 return fill_packet_ipv4(odev
, pkt_dev
);
2258 static void pktgen_clear_counters(struct pktgen_dev
*pkt_dev
)
2260 pkt_dev
->seq_num
= 1;
2261 pkt_dev
->idle_acc
= 0;
2263 pkt_dev
->tx_bytes
= 0;
2264 pkt_dev
->errors
= 0;
2267 /* Set up structure for sending pkts, clear counters */
2269 static void pktgen_run(struct pktgen_thread
*t
)
2271 struct pktgen_dev
*pkt_dev
= NULL
;
2274 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t
));
2277 for (pkt_dev
= t
->if_list
; pkt_dev
; pkt_dev
= pkt_dev
->next
) {
2280 * setup odev and create initial packet.
2282 pktgen_setup_inject(pkt_dev
);
2285 pktgen_clear_counters(pkt_dev
);
2286 pkt_dev
->running
= 1; /* Cranke yeself! */
2287 pkt_dev
->skb
= NULL
;
2288 pkt_dev
->started_at
= getCurUs();
2289 pkt_dev
->next_tx_us
= getCurUs(); /* Transmit immediately */
2290 pkt_dev
->next_tx_ns
= 0;
2292 strcpy(pkt_dev
->result
, "Starting");
2296 strcpy(pkt_dev
->result
, "Error starting");
2299 if(started
) t
->control
&= ~(T_STOP
);
2302 static void pktgen_stop_all_threads_ifs(void)
2304 struct pktgen_thread
*t
= pktgen_threads
;
2306 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n"));
2316 static int thread_is_running(struct pktgen_thread
*t
)
2318 struct pktgen_dev
*next
;
2321 for(next
=t
->if_list
; next
; next
=next
->next
) {
2330 static int pktgen_wait_thread_run(struct pktgen_thread
*t
)
2334 while(thread_is_running(t
)) {
2338 msleep_interruptible(100);
2340 if (signal_pending(current
))
2350 static int pktgen_wait_all_threads_run(void)
2352 struct pktgen_thread
*t
= pktgen_threads
;
2356 sig
= pktgen_wait_thread_run(t
);
2357 if( sig
== 0 ) break;
2365 t
->control
|= (T_STOP
);
2373 static void pktgen_run_all_threads(void)
2375 struct pktgen_thread
*t
= pktgen_threads
;
2377 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2382 t
->control
|= (T_RUN
);
2387 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2389 pktgen_wait_all_threads_run();
2393 static void show_results(struct pktgen_dev
*pkt_dev
, int nr_frags
)
2395 __u64 total_us
, bps
, mbps
, pps
, idle
;
2396 char *p
= pkt_dev
->result
;
2398 total_us
= pkt_dev
->stopped_at
- pkt_dev
->started_at
;
2400 idle
= pkt_dev
->idle_acc
;
2402 p
+= sprintf(p
, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2403 (unsigned long long) total_us
,
2404 (unsigned long long)(total_us
- idle
),
2405 (unsigned long long) idle
,
2406 (unsigned long long) pkt_dev
->sofar
,
2407 pkt_dev
->cur_pkt_size
, nr_frags
);
2409 pps
= pkt_dev
->sofar
* USEC_PER_SEC
;
2411 while ((total_us
>> 32) != 0) {
2416 do_div(pps
, total_us
);
2418 bps
= pps
* 8 * pkt_dev
->cur_pkt_size
;
2421 do_div(mbps
, 1000000);
2422 p
+= sprintf(p
, " %llupps %lluMb/sec (%llubps) errors: %llu",
2423 (unsigned long long) pps
,
2424 (unsigned long long) mbps
,
2425 (unsigned long long) bps
,
2426 (unsigned long long) pkt_dev
->errors
);
2430 /* Set stopped-at timer, remove from running list, do counters & statistics */
2432 static int pktgen_stop_device(struct pktgen_dev
*pkt_dev
)
2435 if (!pkt_dev
->running
) {
2436 printk("pktgen: interface: %s is already stopped\n", pkt_dev
->ifname
);
2440 pkt_dev
->stopped_at
= getCurUs();
2441 pkt_dev
->running
= 0;
2443 show_results(pkt_dev
, skb_shinfo(pkt_dev
->skb
)->nr_frags
);
2446 kfree_skb(pkt_dev
->skb
);
2448 pkt_dev
->skb
= NULL
;
2453 static struct pktgen_dev
*next_to_run(struct pktgen_thread
*t
)
2455 struct pktgen_dev
*next
, *best
= NULL
;
2459 for(next
=t
->if_list
; next
; next
=next
->next
) {
2460 if(!next
->running
) continue;
2461 if(best
== NULL
) best
=next
;
2462 else if ( next
->next_tx_us
< best
->next_tx_us
)
2469 static void pktgen_stop(struct pktgen_thread
*t
) {
2470 struct pktgen_dev
*next
= NULL
;
2472 PG_DEBUG(printk("pktgen: entering pktgen_stop.\n"));
2476 for(next
=t
->if_list
; next
; next
=next
->next
)
2477 pktgen_stop_device(next
);
2482 static void pktgen_rem_all_ifs(struct pktgen_thread
*t
)
2484 struct pktgen_dev
*cur
, *next
= NULL
;
2486 /* Remove all devices, free mem */
2490 for(cur
=t
->if_list
; cur
; cur
=next
) {
2492 pktgen_remove_device(t
, cur
);
2498 static void pktgen_rem_thread(struct pktgen_thread
*t
)
2500 /* Remove from the thread list */
2502 struct pktgen_thread
*tmp
= pktgen_threads
;
2504 remove_proc_entry(t
->name
, pg_proc_dir
);
2509 pktgen_threads
= tmp
->next
;
2512 if (tmp
->next
== t
) {
2513 tmp
->next
= t
->next
;
2523 static __inline__
void pktgen_xmit(struct pktgen_dev
*pkt_dev
)
2525 struct net_device
*odev
= NULL
;
2526 __u64 idle_start
= 0;
2529 odev
= pkt_dev
->odev
;
2531 if (pkt_dev
->delay_us
|| pkt_dev
->delay_ns
) {
2535 if (now
< pkt_dev
->next_tx_us
)
2536 spin(pkt_dev
, pkt_dev
->next_tx_us
);
2538 /* This is max DELAY, this has special meaning of
2541 if (pkt_dev
->delay_us
== 0x7FFFFFFF) {
2542 pkt_dev
->next_tx_us
= getCurUs() + pkt_dev
->delay_us
;
2543 pkt_dev
->next_tx_ns
= pkt_dev
->delay_ns
;
2548 if (netif_queue_stopped(odev
) || need_resched()) {
2549 idle_start
= getCurUs();
2551 if (!netif_running(odev
)) {
2552 pktgen_stop_device(pkt_dev
);
2558 pkt_dev
->idle_acc
+= getCurUs() - idle_start
;
2560 if (netif_queue_stopped(odev
)) {
2561 pkt_dev
->next_tx_us
= getCurUs(); /* TODO */
2562 pkt_dev
->next_tx_ns
= 0;
2563 goto out
; /* Try the next interface */
2567 if (pkt_dev
->last_ok
|| !pkt_dev
->skb
) {
2568 if ((++pkt_dev
->clone_count
>= pkt_dev
->clone_skb
) || (!pkt_dev
->skb
)) {
2569 /* build a new pkt */
2571 kfree_skb(pkt_dev
->skb
);
2573 pkt_dev
->skb
= fill_packet(odev
, pkt_dev
);
2574 if (pkt_dev
->skb
== NULL
) {
2575 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
2577 pkt_dev
->clone_count
--; /* back out increment, OOM */
2580 pkt_dev
->allocated_skbs
++;
2581 pkt_dev
->clone_count
= 0; /* reset counter */
2585 spin_lock_bh(&odev
->xmit_lock
);
2586 if (!netif_queue_stopped(odev
)) {
2588 atomic_inc(&(pkt_dev
->skb
->users
));
2590 ret
= odev
->hard_start_xmit(pkt_dev
->skb
, odev
);
2591 if (likely(ret
== NETDEV_TX_OK
)) {
2592 pkt_dev
->last_ok
= 1;
2595 pkt_dev
->tx_bytes
+= pkt_dev
->cur_pkt_size
;
2597 } else if (ret
== NETDEV_TX_LOCKED
2598 && (odev
->features
& NETIF_F_LLTX
)) {
2601 } else { /* Retry it next time */
2603 atomic_dec(&(pkt_dev
->skb
->users
));
2605 if (debug
&& net_ratelimit())
2606 printk(KERN_INFO
"pktgen: Hard xmit error\n");
2609 pkt_dev
->last_ok
= 0;
2612 pkt_dev
->next_tx_us
= getCurUs();
2613 pkt_dev
->next_tx_ns
= 0;
2615 pkt_dev
->next_tx_us
+= pkt_dev
->delay_us
;
2616 pkt_dev
->next_tx_ns
+= pkt_dev
->delay_ns
;
2618 if (pkt_dev
->next_tx_ns
> 1000) {
2619 pkt_dev
->next_tx_us
++;
2620 pkt_dev
->next_tx_ns
-= 1000;
2624 else { /* Retry it next time */
2625 pkt_dev
->last_ok
= 0;
2626 pkt_dev
->next_tx_us
= getCurUs(); /* TODO */
2627 pkt_dev
->next_tx_ns
= 0;
2630 spin_unlock_bh(&odev
->xmit_lock
);
2632 /* If pkt_dev->count is zero, then run forever */
2633 if ((pkt_dev
->count
!= 0) && (pkt_dev
->sofar
>= pkt_dev
->count
)) {
2634 if (atomic_read(&(pkt_dev
->skb
->users
)) != 1) {
2635 idle_start
= getCurUs();
2636 while (atomic_read(&(pkt_dev
->skb
->users
)) != 1) {
2637 if (signal_pending(current
)) {
2642 pkt_dev
->idle_acc
+= getCurUs() - idle_start
;
2645 /* Done with this */
2646 pktgen_stop_device(pkt_dev
);
2652 * Main loop of the thread goes here
2655 static void pktgen_thread_worker(struct pktgen_thread
*t
)
2658 struct pktgen_dev
*pkt_dev
= NULL
;
2661 u32 max_before_softirq
;
2662 u32 tx_since_softirq
= 0;
2664 daemonize("pktgen/%d", cpu
);
2666 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
2668 spin_lock_irq(¤t
->sighand
->siglock
);
2669 tmpsig
= current
->blocked
;
2670 siginitsetinv(¤t
->blocked
,
2675 recalc_sigpending();
2676 spin_unlock_irq(¤t
->sighand
->siglock
);
2678 /* Migrate to the right CPU */
2679 set_cpus_allowed(current
, cpumask_of_cpu(cpu
));
2680 if (smp_processor_id() != cpu
)
2683 init_waitqueue_head(&t
->queue
);
2685 t
->control
&= ~(T_TERMINATE
);
2686 t
->control
&= ~(T_RUN
);
2687 t
->control
&= ~(T_STOP
);
2688 t
->control
&= ~(T_REMDEV
);
2690 t
->pid
= current
->pid
;
2692 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu
, current
->pid
));
2694 max_before_softirq
= t
->max_before_softirq
;
2696 __set_current_state(TASK_INTERRUPTIBLE
);
2701 __set_current_state(TASK_RUNNING
);
2704 * Get next dev to xmit -- if any.
2707 pkt_dev
= next_to_run(t
);
2711 pktgen_xmit(pkt_dev
);
2714 * We like to stay RUNNING but must also give
2715 * others fair share.
2718 tx_since_softirq
+= pkt_dev
->last_ok
;
2720 if (tx_since_softirq
> max_before_softirq
) {
2721 if (local_softirq_pending())
2723 tx_since_softirq
= 0;
2726 prepare_to_wait(&(t
->queue
), &wait
, TASK_INTERRUPTIBLE
);
2727 schedule_timeout(HZ
/10);
2728 finish_wait(&(t
->queue
), &wait
);
2732 * Back from sleep, either due to the timeout or signal.
2733 * We check if we have any "posted" work for us.
2736 if (t
->control
& T_TERMINATE
|| signal_pending(current
))
2737 /* we received a request to terminate ourself */
2741 if(t
->control
& T_STOP
) {
2743 t
->control
&= ~(T_STOP
);
2746 if(t
->control
& T_RUN
) {
2748 t
->control
&= ~(T_RUN
);
2751 if(t
->control
& T_REMDEV
) {
2752 pktgen_rem_all_ifs(t
);
2753 t
->control
&= ~(T_REMDEV
);
2760 PG_DEBUG(printk("pktgen: %s stopping all device\n", t
->name
));
2763 PG_DEBUG(printk("pktgen: %s removing all device\n", t
->name
));
2764 pktgen_rem_all_ifs(t
);
2766 PG_DEBUG(printk("pktgen: %s removing thread.\n", t
->name
));
2767 pktgen_rem_thread(t
);
2770 static struct pktgen_dev
*pktgen_find_dev(struct pktgen_thread
*t
, const char* ifname
)
2772 struct pktgen_dev
*pkt_dev
= NULL
;
2775 for(pkt_dev
=t
->if_list
; pkt_dev
; pkt_dev
= pkt_dev
->next
) {
2776 if (strncmp(pkt_dev
->ifname
, ifname
, IFNAMSIZ
) == 0) {
2782 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname
,pkt_dev
));
2787 * Adds a dev at front of if_list.
2790 static int add_dev_to_thread(struct pktgen_thread
*t
, struct pktgen_dev
*pkt_dev
)
2796 if (pkt_dev
->pg_thread
) {
2797 printk("pktgen: ERROR: already assigned to a thread.\n");
2801 pkt_dev
->next
=t
->if_list
; t
->if_list
=pkt_dev
;
2802 pkt_dev
->pg_thread
= t
;
2803 pkt_dev
->running
= 0;
2810 /* Called under thread lock */
2812 static int pktgen_add_device(struct pktgen_thread
*t
, const char* ifname
)
2814 struct pktgen_dev
*pkt_dev
;
2815 struct proc_dir_entry
*pe
;
2817 /* We don't allow a device to be on several threads */
2819 pkt_dev
= __pktgen_NN_threads(ifname
, FIND
);
2821 printk("pktgen: ERROR: interface already used.\n");
2825 pkt_dev
= kzalloc(sizeof(struct pktgen_dev
), GFP_KERNEL
);
2829 pkt_dev
->flows
= vmalloc(MAX_CFLOWS
*sizeof(struct flow_state
));
2830 if (pkt_dev
->flows
== NULL
) {
2834 memset(pkt_dev
->flows
, 0, MAX_CFLOWS
*sizeof(struct flow_state
));
2836 pkt_dev
->min_pkt_size
= ETH_ZLEN
;
2837 pkt_dev
->max_pkt_size
= ETH_ZLEN
;
2838 pkt_dev
->nfrags
= 0;
2839 pkt_dev
->clone_skb
= pg_clone_skb_d
;
2840 pkt_dev
->delay_us
= pg_delay_d
/ 1000;
2841 pkt_dev
->delay_ns
= pg_delay_d
% 1000;
2842 pkt_dev
->count
= pg_count_d
;
2844 pkt_dev
->udp_src_min
= 9; /* sink port */
2845 pkt_dev
->udp_src_max
= 9;
2846 pkt_dev
->udp_dst_min
= 9;
2847 pkt_dev
->udp_dst_max
= 9;
2849 strncpy(pkt_dev
->ifname
, ifname
, IFNAMSIZ
);
2851 if (! pktgen_setup_dev(pkt_dev
)) {
2852 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
2854 vfree(pkt_dev
->flows
);
2859 pe
= create_proc_entry(ifname
, 0600, pg_proc_dir
);
2861 printk("pktgen: cannot create %s/%s procfs entry.\n",
2862 PG_PROC_DIR
, ifname
);
2864 vfree(pkt_dev
->flows
);
2868 pe
->proc_fops
= &pktgen_if_fops
;
2871 return add_dev_to_thread(t
, pkt_dev
);
2874 static struct pktgen_thread
* __init
pktgen_find_thread(const char* name
)
2876 struct pktgen_thread
*t
= NULL
;
2882 if (strcmp(t
->name
, name
) == 0)
2891 static int __init
pktgen_create_thread(const char* name
, int cpu
)
2893 struct pktgen_thread
*t
= NULL
;
2894 struct proc_dir_entry
*pe
;
2896 if (strlen(name
) > 31) {
2897 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
2901 if (pktgen_find_thread(name
)) {
2902 printk("pktgen: ERROR: thread: %s already exists\n", name
);
2906 t
= kzalloc(sizeof(struct pktgen_thread
), GFP_KERNEL
);
2908 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
2912 strcpy(t
->name
, name
);
2913 spin_lock_init(&t
->if_lock
);
2916 pe
= create_proc_entry(t
->name
, 0600, pg_proc_dir
);
2918 printk("pktgen: cannot create %s/%s procfs entry.\n",
2919 PG_PROC_DIR
, t
->name
);
2924 pe
->proc_fops
= &pktgen_thread_fops
;
2927 t
->next
= pktgen_threads
;
2930 if (kernel_thread((void *) pktgen_thread_worker
, (void *) t
,
2931 CLONE_FS
| CLONE_FILES
| CLONE_SIGHAND
) < 0)
2932 printk("pktgen: kernel_thread() failed for cpu %d\n", t
->cpu
);
2938 * Removes a device from the thread if_list.
2940 static void _rem_dev_from_if_list(struct pktgen_thread
*t
, struct pktgen_dev
*pkt_dev
)
2942 struct pktgen_dev
*i
, *prev
= NULL
;
2948 if(prev
) prev
->next
= i
->next
;
2949 else t
->if_list
= NULL
;
2957 static int pktgen_remove_device(struct pktgen_thread
*t
, struct pktgen_dev
*pkt_dev
)
2960 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev
));
2962 if (pkt_dev
->running
) {
2963 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
2964 pktgen_stop_device(pkt_dev
);
2967 /* Dis-associate from the interface */
2969 if (pkt_dev
->odev
) {
2970 dev_put(pkt_dev
->odev
);
2971 pkt_dev
->odev
= NULL
;
2974 /* And update the thread if_list */
2976 _rem_dev_from_if_list(t
, pkt_dev
);
2978 /* Clean up proc file system */
2980 remove_proc_entry(pkt_dev
->ifname
, pg_proc_dir
);
2983 vfree(pkt_dev
->flows
);
2988 static int __init
pg_init(void)
2991 struct proc_dir_entry
*pe
;
2995 pg_proc_dir
= proc_mkdir(PG_PROC_DIR
, proc_net
);
2998 pg_proc_dir
->owner
= THIS_MODULE
;
3000 pe
= create_proc_entry(PGCTRL
, 0600, pg_proc_dir
);
3002 printk("pktgen: ERROR: cannot create %s procfs entry.\n", PGCTRL
);
3003 proc_net_remove(PG_PROC_DIR
);
3007 pe
->proc_fops
= &pktgen_fops
;
3010 /* Register us to receive netdevice events */
3011 register_netdevice_notifier(&pktgen_notifier_block
);
3013 for_each_online_cpu(cpu
) {
3016 sprintf(buf
, "kpktgend_%i", cpu
);
3017 pktgen_create_thread(buf
, cpu
);
3022 static void __exit
pg_cleanup(void)
3024 wait_queue_head_t queue
;
3025 init_waitqueue_head(&queue
);
3027 /* Stop all interfaces & threads */
3029 while (pktgen_threads
) {
3030 struct pktgen_thread
*t
= pktgen_threads
;
3031 pktgen_threads
->control
|= (T_TERMINATE
);
3033 wait_event_interruptible_timeout(queue
, (t
!= pktgen_threads
), HZ
);
3036 /* Un-register us from receiving netdevice events */
3037 unregister_netdevice_notifier(&pktgen_notifier_block
);
3039 /* Clean up proc file system */
3040 remove_proc_entry(PGCTRL
, pg_proc_dir
);
3041 proc_net_remove(PG_PROC_DIR
);
3045 module_init(pg_init
);
3046 module_exit(pg_cleanup
);
3048 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3049 MODULE_DESCRIPTION("Packet Generator tool");
3050 MODULE_LICENSE("GPL");
3051 module_param(pg_count_d
, int, 0);
3052 module_param(pg_delay_d
, int, 0);
3053 module_param(pg_clone_skb_d
, int, 0);
3054 module_param(debug
, int, 0);