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/mutex.h>
117 #include <linux/sched.h>
118 #include <linux/slab.h>
119 #include <linux/vmalloc.h>
120 #include <linux/unistd.h>
121 #include <linux/string.h>
122 #include <linux/ptrace.h>
123 #include <linux/errno.h>
124 #include <linux/ioport.h>
125 #include <linux/interrupt.h>
126 #include <linux/capability.h>
127 #include <linux/delay.h>
128 #include <linux/timer.h>
129 #include <linux/list.h>
130 #include <linux/init.h>
131 #include <linux/skbuff.h>
132 #include <linux/netdevice.h>
133 #include <linux/inet.h>
134 #include <linux/inetdevice.h>
135 #include <linux/rtnetlink.h>
136 #include <linux/if_arp.h>
137 #include <linux/in.h>
138 #include <linux/ip.h>
139 #include <linux/ipv6.h>
140 #include <linux/udp.h>
141 #include <linux/proc_fs.h>
142 #include <linux/seq_file.h>
143 #include <linux/wait.h>
144 #include <linux/etherdevice.h>
145 #include <net/checksum.h>
146 #include <net/ipv6.h>
147 #include <net/addrconf.h>
148 #include <asm/byteorder.h>
149 #include <linux/rcupdate.h>
150 #include <asm/bitops.h>
153 #include <asm/uaccess.h>
154 #include <asm/div64.h> /* do_div */
155 #include <asm/timex.h>
157 #define VERSION "pktgen v2.65: Packet Generator for packet performance testing.\n"
159 /* #define PG_DEBUG(a) a */
162 /* The buckets are exponential in 'width' */
163 #define LAT_BUCKETS_MAX 32
164 #define IP_NAME_SZ 32
166 /* Device flag bits */
167 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
168 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
169 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
170 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
171 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
172 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
173 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
174 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
176 /* Thread control flag bits */
177 #define T_TERMINATE (1<<0)
178 #define T_STOP (1<<1) /* Stop run */
179 #define T_RUN (1<<2) /* Start run */
180 #define T_REMDEVALL (1<<3) /* Remove all devs */
181 #define T_REMDEV (1<<4) /* Remove one dev */
184 #define thread_lock() mutex_lock(&pktgen_thread_lock)
185 #define thread_unlock() mutex_unlock(&pktgen_thread_lock)
187 /* If lock -- can be removed after some work */
188 #define if_lock(t) spin_lock(&(t->if_lock));
189 #define if_unlock(t) spin_unlock(&(t->if_lock));
191 /* Used to help with determining the pkts on receive */
192 #define PKTGEN_MAGIC 0xbe9be955
193 #define PG_PROC_DIR "pktgen"
194 #define PGCTRL "pgctrl"
195 static struct proc_dir_entry *pg_proc_dir = NULL;
197 #define MAX_CFLOWS 65536
207 * Try to keep frequent/infrequent used vars. separated.
210 char ifname[IFNAMSIZ];
213 struct pktgen_thread *pg_thread; /* the owner */
214 struct list_head list; /* Used for chaining in the thread's run-queue */
216 int running; /* if this changes to false, the test will stop */
218 /* If min != max, then we will either do a linear iteration, or
219 * we will do a random selection from within the range.
222 int removal_mark; /* non-zero => the device is marked for
223 * removal by worker thread */
225 int min_pkt_size; /* = ETH_ZLEN; */
226 int max_pkt_size; /* = ETH_ZLEN; */
228 __u32 delay_us; /* Default delay */
230 __u64 count; /* Default No packets to send */
231 __u64 sofar; /* How many pkts we've sent so far */
232 __u64 tx_bytes; /* How many bytes we've transmitted */
233 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
235 /* runtime counters relating to clone_skb */
236 __u64 next_tx_us; /* timestamp of when to tx next */
239 __u64 allocated_skbs;
241 int last_ok; /* Was last skb sent?
242 * Or a failed transmit of some sort? This will keep
243 * sequence numbers in order, for example.
245 __u64 started_at; /* micro-seconds */
246 __u64 stopped_at; /* micro-seconds */
247 __u64 idle_acc; /* micro-seconds */
250 int clone_skb; /* Use multiple SKBs during packet gen. If this number
251 * is greater than 1, then that many copies of the same
252 * packet will be sent before a new packet is allocated.
253 * For instance, if you want to send 1024 identical packets
254 * before creating a new packet, set clone_skb to 1024.
257 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
258 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
259 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
260 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
262 struct in6_addr in6_saddr;
263 struct in6_addr in6_daddr;
264 struct in6_addr cur_in6_daddr;
265 struct in6_addr cur_in6_saddr;
267 struct in6_addr min_in6_daddr;
268 struct in6_addr max_in6_daddr;
269 struct in6_addr min_in6_saddr;
270 struct in6_addr max_in6_saddr;
272 /* If we're doing ranges, random or incremental, then this
273 * defines the min/max for those ranges.
275 __u32 saddr_min; /* inclusive, source IP address */
276 __u32 saddr_max; /* exclusive, source IP address */
277 __u32 daddr_min; /* inclusive, dest IP address */
278 __u32 daddr_max; /* exclusive, dest IP address */
280 __u16 udp_src_min; /* inclusive, source UDP port */
281 __u16 udp_src_max; /* exclusive, source UDP port */
282 __u16 udp_dst_min; /* inclusive, dest UDP port */
283 __u16 udp_dst_max; /* exclusive, dest UDP port */
285 __u32 src_mac_count; /* How many MACs to iterate through */
286 __u32 dst_mac_count; /* How many MACs to iterate through */
288 unsigned char dst_mac[ETH_ALEN];
289 unsigned char src_mac[ETH_ALEN];
291 __u32 cur_dst_mac_offset;
292 __u32 cur_src_mac_offset;
301 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
303 We fill in SRC address later
304 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
308 __u16 pad; /* pad out the hh struct to an even 16 bytes */
310 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
311 * are transmitting the same one multiple times
313 struct net_device *odev; /* The out-going device. Note that the device should
314 * have it's pg_info pointer pointing back to this
315 * device. This will be set when the user specifies
316 * the out-going device name (not when the inject is
317 * started as it used to do.)
319 struct flow_state *flows;
320 unsigned cflows; /* Concurrent flows (config) */
321 unsigned lflow; /* Flow length (config) */
322 unsigned nflows; /* accumulated flows (stats) */
332 struct pktgen_thread {
334 struct list_head if_list; /* All device here */
335 struct list_head th_list;
339 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
341 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
347 wait_queue_head_t queue;
353 /* This code works around the fact that do_div cannot handle two 64-bit
354 numbers, and regular 64-bit division doesn't work on x86 kernels.
360 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
361 * Function copied/adapted/optimized from:
363 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
365 * Copyright 1994, University of Cambridge Computer Laboratory
366 * All Rights Reserved.
369 static inline s64 divremdi3(s64 x, s64 y, int type)
371 u64 a = (x < 0) ? -x : x;
372 u64 b = (y < 0) ? -y : y;
392 if (PG_DIV == type) {
393 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
395 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
399 /* End of hacks to deal with 64-bit math on x86 */
401 /** Convert to milliseconds */
402 static inline __u64 tv_to_ms(const struct timeval *tv)
404 __u64 ms = tv->tv_usec / 1000;
405 ms += (__u64) tv->tv_sec * (__u64) 1000;
409 /** Convert to micro-seconds */
410 static inline __u64 tv_to_us(const struct timeval *tv)
412 __u64 us = tv->tv_usec;
413 us += (__u64) tv->tv_sec * (__u64) 1000000;
417 static inline __u64 pg_div(__u64 n, __u32 base)
421 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
426 static inline __u64 pg_div64(__u64 n, __u64 base)
430 * How do we know if the architecture we are running on
431 * supports division with 64 bit base?
434 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
438 tmp = divremdi3(n, base, PG_DIV);
443 static inline u32 pktgen_random(void)
447 get_random_bytes(&n, 4);
454 static inline __u64 getCurMs(void)
457 do_gettimeofday(&tv);
458 return tv_to_ms(&tv);
461 static inline __u64 getCurUs(void)
464 do_gettimeofday(&tv);
465 return tv_to_us(&tv);
468 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
470 return tv_to_us(a) - tv_to_us(b);
473 /* old include end */
475 static char version[] __initdata = VERSION;
477 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
478 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
479 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
481 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
482 static void pktgen_run_all_threads(void);
483 static void pktgen_stop_all_threads_ifs(void);
484 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
485 static void pktgen_stop(struct pktgen_thread *t);
486 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
487 static int pktgen_mark_device(const char *ifname);
488 static unsigned int scan_ip6(const char *s, char ip[16]);
489 static unsigned int fmt_ip6(char *s, const char ip[16]);
491 /* Module parameters, defaults. */
492 static int pg_count_d = 1000; /* 1000 pkts by default */
493 static int pg_delay_d;
494 static int pg_clone_skb_d;
497 static DEFINE_MUTEX(pktgen_thread_lock);
498 static LIST_HEAD(pktgen_threads);
500 static struct notifier_block pktgen_notifier_block = {
501 .notifier_call = pktgen_device_event,
505 * /proc handling functions
509 static int pgctrl_show(struct seq_file *seq, void *v)
511 seq_puts(seq, VERSION);
515 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
516 size_t count, loff_t * ppos)
521 if (!capable(CAP_NET_ADMIN)) {
526 if (count > sizeof(data))
527 count = sizeof(data);
529 if (copy_from_user(data, buf, count)) {
533 data[count - 1] = 0; /* Make string */
535 if (!strcmp(data, "stop"))
536 pktgen_stop_all_threads_ifs();
538 else if (!strcmp(data, "start"))
539 pktgen_run_all_threads();
542 printk("pktgen: Unknown command: %s\n", data);
550 static int pgctrl_open(struct inode *inode, struct file *file)
552 return single_open(file, pgctrl_show, PDE(inode)->data);
555 static struct file_operations pktgen_fops = {
556 .owner = THIS_MODULE,
560 .write = pgctrl_write,
561 .release = single_release,
564 static int pktgen_if_show(struct seq_file *seq, void *v)
567 struct pktgen_dev *pkt_dev = seq->private;
570 __u64 now = getCurUs();
573 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
574 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
575 pkt_dev->max_pkt_size);
578 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
580 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
581 pkt_dev->clone_skb, pkt_dev->ifname);
583 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
586 if (pkt_dev->flags & F_IPV6) {
587 char b1[128], b2[128], b3[128];
588 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
589 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
590 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
592 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
595 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
596 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
597 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
599 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
604 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
605 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
608 seq_puts(seq, " src_mac: ");
610 if (is_zero_ether_addr(pkt_dev->src_mac))
611 for (i = 0; i < 6; i++)
612 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
615 for (i = 0; i < 6; i++)
616 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
619 seq_printf(seq, "dst_mac: ");
620 for (i = 0; i < 6; i++)
621 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
622 i == 5 ? "\n" : ":");
625 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
626 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
627 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
630 " src_mac_count: %d dst_mac_count: %d \n Flags: ",
631 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
633 if (pkt_dev->flags & F_IPV6)
634 seq_printf(seq, "IPV6 ");
636 if (pkt_dev->flags & F_IPSRC_RND)
637 seq_printf(seq, "IPSRC_RND ");
639 if (pkt_dev->flags & F_IPDST_RND)
640 seq_printf(seq, "IPDST_RND ");
642 if (pkt_dev->flags & F_TXSIZE_RND)
643 seq_printf(seq, "TXSIZE_RND ");
645 if (pkt_dev->flags & F_UDPSRC_RND)
646 seq_printf(seq, "UDPSRC_RND ");
648 if (pkt_dev->flags & F_UDPDST_RND)
649 seq_printf(seq, "UDPDST_RND ");
651 if (pkt_dev->flags & F_MACSRC_RND)
652 seq_printf(seq, "MACSRC_RND ");
654 if (pkt_dev->flags & F_MACDST_RND)
655 seq_printf(seq, "MACDST_RND ");
659 sa = pkt_dev->started_at;
660 stopped = pkt_dev->stopped_at;
661 if (pkt_dev->running)
662 stopped = now; /* not really stopped, more like last-running-at */
665 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
666 (unsigned long long)pkt_dev->sofar,
667 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
668 (unsigned long long)stopped,
669 (unsigned long long)pkt_dev->idle_acc);
672 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
673 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
674 pkt_dev->cur_src_mac_offset);
676 if (pkt_dev->flags & F_IPV6) {
677 char b1[128], b2[128];
678 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
679 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
680 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
682 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
683 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
685 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
686 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
688 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
690 if (pkt_dev->result[0])
691 seq_printf(seq, "Result: %s\n", pkt_dev->result);
693 seq_printf(seq, "Result: Idle\n");
698 static int count_trail_chars(const char __user * user_buffer,
703 for (i = 0; i < maxlen; i++) {
705 if (get_user(c, &user_buffer[i]))
723 static unsigned long num_arg(const char __user * user_buffer,
724 unsigned long maxlen, unsigned long *num)
729 for (; i < maxlen; i++) {
731 if (get_user(c, &user_buffer[i]))
733 if ((c >= '0') && (c <= '9')) {
742 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
746 for (; i < maxlen; i++) {
748 if (get_user(c, &user_buffer[i]))
766 static ssize_t pktgen_if_write(struct file *file,
767 const char __user * user_buffer, size_t count,
770 struct seq_file *seq = (struct seq_file *)file->private_data;
771 struct pktgen_dev *pkt_dev = seq->private;
773 char name[16], valstr[32];
774 unsigned long value = 0;
775 char *pg_result = NULL;
779 pg_result = &(pkt_dev->result[0]);
782 printk("pktgen: wrong command format\n");
787 tmp = count_trail_chars(&user_buffer[i], max);
789 printk("pktgen: illegal format\n");
794 /* Read variable name */
796 len = strn_len(&user_buffer[i], sizeof(name) - 1);
800 memset(name, 0, sizeof(name));
801 if (copy_from_user(name, &user_buffer[i], len))
806 len = count_trail_chars(&user_buffer[i], max);
814 if (copy_from_user(tb, user_buffer, count))
817 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
818 (unsigned long)count, tb);
821 if (!strcmp(name, "min_pkt_size")) {
822 len = num_arg(&user_buffer[i], 10, &value);
827 if (value < 14 + 20 + 8)
829 if (value != pkt_dev->min_pkt_size) {
830 pkt_dev->min_pkt_size = value;
831 pkt_dev->cur_pkt_size = value;
833 sprintf(pg_result, "OK: min_pkt_size=%u",
834 pkt_dev->min_pkt_size);
838 if (!strcmp(name, "max_pkt_size")) {
839 len = num_arg(&user_buffer[i], 10, &value);
844 if (value < 14 + 20 + 8)
846 if (value != pkt_dev->max_pkt_size) {
847 pkt_dev->max_pkt_size = value;
848 pkt_dev->cur_pkt_size = value;
850 sprintf(pg_result, "OK: max_pkt_size=%u",
851 pkt_dev->max_pkt_size);
855 /* Shortcut for min = max */
857 if (!strcmp(name, "pkt_size")) {
858 len = num_arg(&user_buffer[i], 10, &value);
863 if (value < 14 + 20 + 8)
865 if (value != pkt_dev->min_pkt_size) {
866 pkt_dev->min_pkt_size = value;
867 pkt_dev->max_pkt_size = value;
868 pkt_dev->cur_pkt_size = value;
870 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
874 if (!strcmp(name, "debug")) {
875 len = num_arg(&user_buffer[i], 10, &value);
881 sprintf(pg_result, "OK: debug=%u", debug);
885 if (!strcmp(name, "frags")) {
886 len = num_arg(&user_buffer[i], 10, &value);
891 pkt_dev->nfrags = value;
892 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
895 if (!strcmp(name, "delay")) {
896 len = num_arg(&user_buffer[i], 10, &value);
901 if (value == 0x7FFFFFFF) {
902 pkt_dev->delay_us = 0x7FFFFFFF;
903 pkt_dev->delay_ns = 0;
905 pkt_dev->delay_us = value / 1000;
906 pkt_dev->delay_ns = value % 1000;
908 sprintf(pg_result, "OK: delay=%u",
909 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
912 if (!strcmp(name, "udp_src_min")) {
913 len = num_arg(&user_buffer[i], 10, &value);
918 if (value != pkt_dev->udp_src_min) {
919 pkt_dev->udp_src_min = value;
920 pkt_dev->cur_udp_src = value;
922 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
925 if (!strcmp(name, "udp_dst_min")) {
926 len = num_arg(&user_buffer[i], 10, &value);
931 if (value != pkt_dev->udp_dst_min) {
932 pkt_dev->udp_dst_min = value;
933 pkt_dev->cur_udp_dst = value;
935 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
938 if (!strcmp(name, "udp_src_max")) {
939 len = num_arg(&user_buffer[i], 10, &value);
944 if (value != pkt_dev->udp_src_max) {
945 pkt_dev->udp_src_max = value;
946 pkt_dev->cur_udp_src = value;
948 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
951 if (!strcmp(name, "udp_dst_max")) {
952 len = num_arg(&user_buffer[i], 10, &value);
957 if (value != pkt_dev->udp_dst_max) {
958 pkt_dev->udp_dst_max = value;
959 pkt_dev->cur_udp_dst = value;
961 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
964 if (!strcmp(name, "clone_skb")) {
965 len = num_arg(&user_buffer[i], 10, &value);
970 pkt_dev->clone_skb = value;
972 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
975 if (!strcmp(name, "count")) {
976 len = num_arg(&user_buffer[i], 10, &value);
981 pkt_dev->count = value;
982 sprintf(pg_result, "OK: count=%llu",
983 (unsigned long long)pkt_dev->count);
986 if (!strcmp(name, "src_mac_count")) {
987 len = num_arg(&user_buffer[i], 10, &value);
992 if (pkt_dev->src_mac_count != value) {
993 pkt_dev->src_mac_count = value;
994 pkt_dev->cur_src_mac_offset = 0;
996 sprintf(pg_result, "OK: src_mac_count=%d",
997 pkt_dev->src_mac_count);
1000 if (!strcmp(name, "dst_mac_count")) {
1001 len = num_arg(&user_buffer[i], 10, &value);
1006 if (pkt_dev->dst_mac_count != value) {
1007 pkt_dev->dst_mac_count = value;
1008 pkt_dev->cur_dst_mac_offset = 0;
1010 sprintf(pg_result, "OK: dst_mac_count=%d",
1011 pkt_dev->dst_mac_count);
1014 if (!strcmp(name, "flag")) {
1017 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1021 if (copy_from_user(f, &user_buffer[i], len))
1024 if (strcmp(f, "IPSRC_RND") == 0)
1025 pkt_dev->flags |= F_IPSRC_RND;
1027 else if (strcmp(f, "!IPSRC_RND") == 0)
1028 pkt_dev->flags &= ~F_IPSRC_RND;
1030 else if (strcmp(f, "TXSIZE_RND") == 0)
1031 pkt_dev->flags |= F_TXSIZE_RND;
1033 else if (strcmp(f, "!TXSIZE_RND") == 0)
1034 pkt_dev->flags &= ~F_TXSIZE_RND;
1036 else if (strcmp(f, "IPDST_RND") == 0)
1037 pkt_dev->flags |= F_IPDST_RND;
1039 else if (strcmp(f, "!IPDST_RND") == 0)
1040 pkt_dev->flags &= ~F_IPDST_RND;
1042 else if (strcmp(f, "UDPSRC_RND") == 0)
1043 pkt_dev->flags |= F_UDPSRC_RND;
1045 else if (strcmp(f, "!UDPSRC_RND") == 0)
1046 pkt_dev->flags &= ~F_UDPSRC_RND;
1048 else if (strcmp(f, "UDPDST_RND") == 0)
1049 pkt_dev->flags |= F_UDPDST_RND;
1051 else if (strcmp(f, "!UDPDST_RND") == 0)
1052 pkt_dev->flags &= ~F_UDPDST_RND;
1054 else if (strcmp(f, "MACSRC_RND") == 0)
1055 pkt_dev->flags |= F_MACSRC_RND;
1057 else if (strcmp(f, "!MACSRC_RND") == 0)
1058 pkt_dev->flags &= ~F_MACSRC_RND;
1060 else if (strcmp(f, "MACDST_RND") == 0)
1061 pkt_dev->flags |= F_MACDST_RND;
1063 else if (strcmp(f, "!MACDST_RND") == 0)
1064 pkt_dev->flags &= ~F_MACDST_RND;
1068 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1070 "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1073 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1076 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1077 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1082 if (copy_from_user(buf, &user_buffer[i], len))
1085 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1086 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1087 strncpy(pkt_dev->dst_min, buf, len);
1088 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1089 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1092 printk("pktgen: dst_min set to: %s\n",
1095 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1098 if (!strcmp(name, "dst_max")) {
1099 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1104 if (copy_from_user(buf, &user_buffer[i], len))
1108 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1109 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1110 strncpy(pkt_dev->dst_max, buf, len);
1111 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1112 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1115 printk("pktgen: dst_max set to: %s\n",
1118 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1121 if (!strcmp(name, "dst6")) {
1122 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1126 pkt_dev->flags |= F_IPV6;
1128 if (copy_from_user(buf, &user_buffer[i], len))
1132 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1133 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1135 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1138 printk("pktgen: dst6 set to: %s\n", buf);
1141 sprintf(pg_result, "OK: dst6=%s", buf);
1144 if (!strcmp(name, "dst6_min")) {
1145 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1149 pkt_dev->flags |= F_IPV6;
1151 if (copy_from_user(buf, &user_buffer[i], len))
1155 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1156 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1158 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1159 &pkt_dev->min_in6_daddr);
1161 printk("pktgen: dst6_min set to: %s\n", buf);
1164 sprintf(pg_result, "OK: dst6_min=%s", buf);
1167 if (!strcmp(name, "dst6_max")) {
1168 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1172 pkt_dev->flags |= F_IPV6;
1174 if (copy_from_user(buf, &user_buffer[i], len))
1178 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1179 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1182 printk("pktgen: dst6_max set to: %s\n", buf);
1185 sprintf(pg_result, "OK: dst6_max=%s", buf);
1188 if (!strcmp(name, "src6")) {
1189 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1193 pkt_dev->flags |= F_IPV6;
1195 if (copy_from_user(buf, &user_buffer[i], len))
1199 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1200 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1202 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1205 printk("pktgen: src6 set to: %s\n", buf);
1208 sprintf(pg_result, "OK: src6=%s", buf);
1211 if (!strcmp(name, "src_min")) {
1212 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1216 if (copy_from_user(buf, &user_buffer[i], len))
1219 if (strcmp(buf, pkt_dev->src_min) != 0) {
1220 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1221 strncpy(pkt_dev->src_min, buf, len);
1222 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1223 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1226 printk("pktgen: src_min set to: %s\n",
1229 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1232 if (!strcmp(name, "src_max")) {
1233 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1237 if (copy_from_user(buf, &user_buffer[i], len))
1240 if (strcmp(buf, pkt_dev->src_max) != 0) {
1241 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1242 strncpy(pkt_dev->src_max, buf, len);
1243 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1244 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1247 printk("pktgen: src_max set to: %s\n",
1250 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1253 if (!strcmp(name, "dst_mac")) {
1255 unsigned char old_dmac[ETH_ALEN];
1256 unsigned char *m = pkt_dev->dst_mac;
1257 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1259 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1263 memset(valstr, 0, sizeof(valstr));
1264 if (copy_from_user(valstr, &user_buffer[i], len))
1268 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1269 if (*v >= '0' && *v <= '9') {
1273 if (*v >= 'A' && *v <= 'F') {
1275 *m += *v - 'A' + 10;
1277 if (*v >= 'a' && *v <= 'f') {
1279 *m += *v - 'a' + 10;
1287 /* Set up Dest MAC */
1288 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1289 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1291 sprintf(pg_result, "OK: dstmac");
1294 if (!strcmp(name, "src_mac")) {
1296 unsigned char *m = pkt_dev->src_mac;
1298 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1302 memset(valstr, 0, sizeof(valstr));
1303 if (copy_from_user(valstr, &user_buffer[i], len))
1307 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1308 if (*v >= '0' && *v <= '9') {
1312 if (*v >= 'A' && *v <= 'F') {
1314 *m += *v - 'A' + 10;
1316 if (*v >= 'a' && *v <= 'f') {
1318 *m += *v - 'a' + 10;
1326 sprintf(pg_result, "OK: srcmac");
1330 if (!strcmp(name, "clear_counters")) {
1331 pktgen_clear_counters(pkt_dev);
1332 sprintf(pg_result, "OK: Clearing counters.\n");
1336 if (!strcmp(name, "flows")) {
1337 len = num_arg(&user_buffer[i], 10, &value);
1342 if (value > MAX_CFLOWS)
1345 pkt_dev->cflows = value;
1346 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1350 if (!strcmp(name, "flowlen")) {
1351 len = num_arg(&user_buffer[i], 10, &value);
1356 pkt_dev->lflow = value;
1357 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1361 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1365 static int pktgen_if_open(struct inode *inode, struct file *file)
1367 return single_open(file, pktgen_if_show, PDE(inode)->data);
1370 static struct file_operations pktgen_if_fops = {
1371 .owner = THIS_MODULE,
1372 .open = pktgen_if_open,
1374 .llseek = seq_lseek,
1375 .write = pktgen_if_write,
1376 .release = single_release,
1379 static int pktgen_thread_show(struct seq_file *seq, void *v)
1381 struct pktgen_thread *t = seq->private;
1382 struct pktgen_dev *pkt_dev;
1386 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1387 t->name, t->max_before_softirq);
1389 seq_printf(seq, "Running: ");
1392 list_for_each_entry(pkt_dev, &t->if_list, list)
1393 if (pkt_dev->running)
1394 seq_printf(seq, "%s ", pkt_dev->ifname);
1396 seq_printf(seq, "\nStopped: ");
1398 list_for_each_entry(pkt_dev, &t->if_list, list)
1399 if (!pkt_dev->running)
1400 seq_printf(seq, "%s ", pkt_dev->ifname);
1403 seq_printf(seq, "\nResult: %s\n", t->result);
1405 seq_printf(seq, "\nResult: NA\n");
1412 static ssize_t pktgen_thread_write(struct file *file,
1413 const char __user * user_buffer,
1414 size_t count, loff_t * offset)
1416 struct seq_file *seq = (struct seq_file *)file->private_data;
1417 struct pktgen_thread *t = seq->private;
1418 int i = 0, max, len, ret;
1421 unsigned long value = 0;
1424 // sprintf(pg_result, "Wrong command format");
1429 len = count_trail_chars(&user_buffer[i], max);
1435 /* Read variable name */
1437 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1441 memset(name, 0, sizeof(name));
1442 if (copy_from_user(name, &user_buffer[i], len))
1447 len = count_trail_chars(&user_buffer[i], max);
1454 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1457 printk("pktgen: ERROR: No thread\n");
1462 pg_result = &(t->result[0]);
1464 if (!strcmp(name, "add_device")) {
1467 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1472 if (copy_from_user(f, &user_buffer[i], len))
1476 pktgen_add_device(t, f);
1479 sprintf(pg_result, "OK: add_device=%s", f);
1483 if (!strcmp(name, "rem_device_all")) {
1485 t->control |= T_REMDEVALL;
1487 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1489 sprintf(pg_result, "OK: rem_device_all");
1493 if (!strcmp(name, "max_before_softirq")) {
1494 len = num_arg(&user_buffer[i], 10, &value);
1496 t->max_before_softirq = value;
1499 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1508 static int pktgen_thread_open(struct inode *inode, struct file *file)
1510 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1513 static struct file_operations pktgen_thread_fops = {
1514 .owner = THIS_MODULE,
1515 .open = pktgen_thread_open,
1517 .llseek = seq_lseek,
1518 .write = pktgen_thread_write,
1519 .release = single_release,
1522 /* Think find or remove for NN */
1523 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1525 struct pktgen_thread *t;
1526 struct pktgen_dev *pkt_dev = NULL;
1528 list_for_each_entry(t, &pktgen_threads, th_list) {
1529 pkt_dev = pktgen_find_dev(t, ifname);
1533 pkt_dev->removal_mark = 1;
1534 t->control |= T_REMDEV;
1544 * mark a device for removal
1546 static int pktgen_mark_device(const char *ifname)
1548 struct pktgen_dev *pkt_dev = NULL;
1549 const int max_tries = 10, msec_per_try = 125;
1554 PG_DEBUG(printk("pktgen: pktgen_mark_device marking %s for removal\n",
1559 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1560 if (pkt_dev == NULL)
1561 break; /* success */
1564 PG_DEBUG(printk("pktgen: pktgen_mark_device waiting for %s "
1565 "to disappear....\n", ifname));
1566 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1569 if (++i >= max_tries) {
1570 printk("pktgen_mark_device: timed out after waiting "
1571 "%d msec for device %s to be removed\n",
1572 msec_per_try * i, ifname);
1584 static int pktgen_device_event(struct notifier_block *unused,
1585 unsigned long event, void *ptr)
1587 struct net_device *dev = (struct net_device *)(ptr);
1589 /* It is OK that we do not hold the group lock right now,
1590 * as we run under the RTNL lock.
1594 case NETDEV_CHANGEADDR:
1595 case NETDEV_GOING_DOWN:
1598 /* Ignore for now */
1601 case NETDEV_UNREGISTER:
1602 pktgen_mark_device(dev->name);
1609 /* Associate pktgen_dev with a device. */
1611 static struct net_device *pktgen_setup_dev(struct pktgen_dev *pkt_dev)
1613 struct net_device *odev;
1615 /* Clean old setups */
1617 if (pkt_dev->odev) {
1618 dev_put(pkt_dev->odev);
1619 pkt_dev->odev = NULL;
1622 odev = dev_get_by_name(pkt_dev->ifname);
1625 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1628 if (odev->type != ARPHRD_ETHER) {
1629 printk("pktgen: not an ethernet device: \"%s\"\n",
1633 if (!netif_running(odev)) {
1634 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1637 pkt_dev->odev = odev;
1639 return pkt_dev->odev;
1648 /* Read pkt_dev from the interface and set up internal pktgen_dev
1649 * structure to have the right information to create/send packets
1651 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1653 /* Try once more, just in case it works now. */
1655 pktgen_setup_dev(pkt_dev);
1657 if (!pkt_dev->odev) {
1658 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1659 sprintf(pkt_dev->result,
1660 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1664 /* Default to the interface's mac if not explicitly set. */
1666 if (is_zero_ether_addr(pkt_dev->src_mac))
1667 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1669 /* Set up Dest MAC */
1670 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1672 /* Set up pkt size */
1673 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1675 if (pkt_dev->flags & F_IPV6) {
1677 * Skip this automatic address setting until locks or functions
1682 int i, set = 0, err = 1;
1683 struct inet6_dev *idev;
1685 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1686 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1694 * Use linklevel address if unconfigured.
1696 * use ipv6_get_lladdr if/when it's get exported
1699 read_lock(&addrconf_lock);
1700 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1701 struct inet6_ifaddr *ifp;
1703 read_lock_bh(&idev->lock);
1704 for (ifp = idev->addr_list; ifp;
1705 ifp = ifp->if_next) {
1706 if (ifp->scope == IFA_LINK
1708 flags & IFA_F_TENTATIVE)) {
1709 ipv6_addr_copy(&pkt_dev->
1716 read_unlock_bh(&idev->lock);
1718 read_unlock(&addrconf_lock);
1720 printk("pktgen: ERROR: IPv6 link address not availble.\n");
1724 pkt_dev->saddr_min = 0;
1725 pkt_dev->saddr_max = 0;
1726 if (strlen(pkt_dev->src_min) == 0) {
1728 struct in_device *in_dev;
1731 in_dev = __in_dev_get_rcu(pkt_dev->odev);
1733 if (in_dev->ifa_list) {
1734 pkt_dev->saddr_min =
1735 in_dev->ifa_list->ifa_address;
1736 pkt_dev->saddr_max = pkt_dev->saddr_min;
1741 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1742 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1745 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1746 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1748 /* Initialize current values. */
1749 pkt_dev->cur_dst_mac_offset = 0;
1750 pkt_dev->cur_src_mac_offset = 0;
1751 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1752 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1753 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1754 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1755 pkt_dev->nflows = 0;
1758 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
1763 start = now = getCurUs();
1764 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
1765 while (now < spin_until_us) {
1766 /* TODO: optimize sleeping behavior */
1767 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
1768 schedule_timeout_interruptible(1);
1769 else if (spin_until_us - now > 100) {
1771 if (!pkt_dev->running)
1780 pkt_dev->idle_acc += now - start;
1783 /* Increment/randomize headers according to flags and current values
1784 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
1786 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
1792 if (pkt_dev->cflows) {
1793 flow = pktgen_random() % pkt_dev->cflows;
1795 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
1796 pkt_dev->flows[flow].count = 0;
1799 /* Deal with source MAC */
1800 if (pkt_dev->src_mac_count > 1) {
1804 if (pkt_dev->flags & F_MACSRC_RND)
1805 mc = pktgen_random() % (pkt_dev->src_mac_count);
1807 mc = pkt_dev->cur_src_mac_offset++;
1808 if (pkt_dev->cur_src_mac_offset >
1809 pkt_dev->src_mac_count)
1810 pkt_dev->cur_src_mac_offset = 0;
1813 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
1814 pkt_dev->hh[11] = tmp;
1815 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1816 pkt_dev->hh[10] = tmp;
1817 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1818 pkt_dev->hh[9] = tmp;
1819 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1820 pkt_dev->hh[8] = tmp;
1821 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
1822 pkt_dev->hh[7] = tmp;
1825 /* Deal with Destination MAC */
1826 if (pkt_dev->dst_mac_count > 1) {
1830 if (pkt_dev->flags & F_MACDST_RND)
1831 mc = pktgen_random() % (pkt_dev->dst_mac_count);
1834 mc = pkt_dev->cur_dst_mac_offset++;
1835 if (pkt_dev->cur_dst_mac_offset >
1836 pkt_dev->dst_mac_count) {
1837 pkt_dev->cur_dst_mac_offset = 0;
1841 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
1842 pkt_dev->hh[5] = tmp;
1843 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1844 pkt_dev->hh[4] = tmp;
1845 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1846 pkt_dev->hh[3] = tmp;
1847 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1848 pkt_dev->hh[2] = tmp;
1849 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
1850 pkt_dev->hh[1] = tmp;
1853 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
1854 if (pkt_dev->flags & F_UDPSRC_RND)
1855 pkt_dev->cur_udp_src =
1857 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) +
1858 pkt_dev->udp_src_min);
1861 pkt_dev->cur_udp_src++;
1862 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
1863 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1867 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
1868 if (pkt_dev->flags & F_UDPDST_RND) {
1869 pkt_dev->cur_udp_dst =
1871 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) +
1872 pkt_dev->udp_dst_min);
1874 pkt_dev->cur_udp_dst++;
1875 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1876 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1880 if (!(pkt_dev->flags & F_IPV6)) {
1882 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
1886 if (pkt_dev->flags & F_IPSRC_RND)
1887 t = ((pktgen_random() % (imx - imn)) + imn);
1889 t = ntohl(pkt_dev->cur_saddr);
1895 pkt_dev->cur_saddr = htonl(t);
1898 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
1899 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
1902 if ((imn = ntohl(pkt_dev->daddr_min)) < (imx =
1907 if (pkt_dev->flags & F_IPDST_RND) {
1909 t = ((pktgen_random() % (imx - imn)) +
1913 while (LOOPBACK(t) || MULTICAST(t)
1914 || BADCLASS(t) || ZERONET(t)
1915 || LOCAL_MCAST(t)) {
1916 t = ((pktgen_random() %
1917 (imx - imn)) + imn);
1920 pkt_dev->cur_daddr = t;
1924 t = ntohl(pkt_dev->cur_daddr);
1929 pkt_dev->cur_daddr = htonl(t);
1932 if (pkt_dev->cflows) {
1933 pkt_dev->flows[flow].cur_daddr =
1938 } else { /* IPV6 * */
1940 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
1941 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
1942 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
1943 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
1947 /* Only random destinations yet */
1949 for (i = 0; i < 4; i++) {
1950 pkt_dev->cur_in6_daddr.s6_addr32[i] =
1952 pkt_dev->min_in6_daddr.s6_addr32[i]) &
1953 pkt_dev->max_in6_daddr.s6_addr32[i]);
1958 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
1960 if (pkt_dev->flags & F_TXSIZE_RND) {
1961 t = ((pktgen_random() %
1962 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
1963 + pkt_dev->min_pkt_size);
1965 t = pkt_dev->cur_pkt_size + 1;
1966 if (t > pkt_dev->max_pkt_size)
1967 t = pkt_dev->min_pkt_size;
1969 pkt_dev->cur_pkt_size = t;
1972 pkt_dev->flows[flow].count++;
1975 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
1976 struct pktgen_dev *pkt_dev)
1978 struct sk_buff *skb = NULL;
1980 struct udphdr *udph;
1983 struct pktgen_hdr *pgh = NULL;
1985 /* Update any of the values, used when we're incrementing various
1988 mod_cur_headers(pkt_dev);
1990 datalen = (odev->hard_header_len + 16) & ~0xf;
1991 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen, GFP_ATOMIC);
1993 sprintf(pkt_dev->result, "No memory");
1997 skb_reserve(skb, datalen);
1999 /* Reserve for ethernet and IP header */
2000 eth = (__u8 *) skb_push(skb, 14);
2001 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
2002 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2004 memcpy(eth, pkt_dev->hh, 12);
2005 *(u16 *) & eth[12] = __constant_htons(ETH_P_IP);
2007 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
2008 if (datalen < sizeof(struct pktgen_hdr))
2009 datalen = sizeof(struct pktgen_hdr);
2011 udph->source = htons(pkt_dev->cur_udp_src);
2012 udph->dest = htons(pkt_dev->cur_udp_dst);
2013 udph->len = htons(datalen + 8); /* DATA + udphdr */
2014 udph->check = 0; /* No checksum */
2020 iph->protocol = IPPROTO_UDP; /* UDP */
2021 iph->saddr = pkt_dev->cur_saddr;
2022 iph->daddr = pkt_dev->cur_daddr;
2024 iplen = 20 + 8 + datalen;
2025 iph->tot_len = htons(iplen);
2027 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2028 skb->protocol = __constant_htons(ETH_P_IP);
2029 skb->mac.raw = ((u8 *) iph) - 14;
2031 skb->pkt_type = PACKET_HOST;
2033 if (pkt_dev->nfrags <= 0)
2034 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2036 int frags = pkt_dev->nfrags;
2039 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2041 if (frags > MAX_SKB_FRAGS)
2042 frags = MAX_SKB_FRAGS;
2043 if (datalen > frags * PAGE_SIZE) {
2044 skb_put(skb, datalen - frags * PAGE_SIZE);
2045 datalen = frags * PAGE_SIZE;
2049 while (datalen > 0) {
2050 struct page *page = alloc_pages(GFP_KERNEL, 0);
2051 skb_shinfo(skb)->frags[i].page = page;
2052 skb_shinfo(skb)->frags[i].page_offset = 0;
2053 skb_shinfo(skb)->frags[i].size =
2054 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2055 datalen -= skb_shinfo(skb)->frags[i].size;
2056 skb->len += skb_shinfo(skb)->frags[i].size;
2057 skb->data_len += skb_shinfo(skb)->frags[i].size;
2059 skb_shinfo(skb)->nr_frags = i;
2068 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2072 skb_shinfo(skb)->frags[i - 1].size -= rem;
2074 skb_shinfo(skb)->frags[i] =
2075 skb_shinfo(skb)->frags[i - 1];
2076 get_page(skb_shinfo(skb)->frags[i].page);
2077 skb_shinfo(skb)->frags[i].page =
2078 skb_shinfo(skb)->frags[i - 1].page;
2079 skb_shinfo(skb)->frags[i].page_offset +=
2080 skb_shinfo(skb)->frags[i - 1].size;
2081 skb_shinfo(skb)->frags[i].size = rem;
2083 skb_shinfo(skb)->nr_frags = i;
2087 /* Stamp the time, and sequence number, convert them to network byte order */
2090 struct timeval timestamp;
2092 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2093 pgh->seq_num = htonl(pkt_dev->seq_num);
2095 do_gettimeofday(×tamp);
2096 pgh->tv_sec = htonl(timestamp.tv_sec);
2097 pgh->tv_usec = htonl(timestamp.tv_usec);
2105 * scan_ip6, fmt_ip taken from dietlibc-0.21
2106 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2108 * Slightly modified for kernel.
2109 * Should be candidate for net/ipv4/utils.c
2113 static unsigned int scan_ip6(const char *s, char ip[16])
2116 unsigned int len = 0;
2119 unsigned int prefixlen = 0;
2120 unsigned int suffixlen = 0;
2123 for (i = 0; i < 16; i++)
2129 if (s[1] == ':') { /* Found "::", skip to part 2 */
2138 u = simple_strtoul(s, &tmp, 16);
2144 if (prefixlen == 12 && s[i] == '.') {
2146 /* the last 4 bytes may be written as IPv4 address */
2149 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2152 ip[prefixlen++] = (u >> 8);
2153 ip[prefixlen++] = (u & 255);
2156 if (prefixlen == 16)
2160 /* part 2, after "::" */
2167 } else if (suffixlen != 0)
2171 u = simple_strtol(s, &tmp, 16);
2179 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2181 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2187 suffix[suffixlen++] = (u >> 8);
2188 suffix[suffixlen++] = (u & 255);
2191 if (prefixlen + suffixlen == 16)
2194 for (i = 0; i < suffixlen; i++)
2195 ip[16 - suffixlen + i] = suffix[i];
2199 static char tohex(char hexdigit)
2201 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2204 static int fmt_xlong(char *s, unsigned int i)
2207 *s = tohex((i >> 12) & 0xf);
2208 if (s != bak || *s != '0')
2210 *s = tohex((i >> 8) & 0xf);
2211 if (s != bak || *s != '0')
2213 *s = tohex((i >> 4) & 0xf);
2214 if (s != bak || *s != '0')
2216 *s = tohex(i & 0xf);
2220 static unsigned int fmt_ip6(char *s, const char ip[16])
2225 unsigned int compressing;
2230 for (j = 0; j < 16; j += 2) {
2232 #ifdef V4MAPPEDPREFIX
2233 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2234 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2239 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2240 (unsigned long)(unsigned char)ip[j + 1];
2255 i = fmt_xlong(s, temp);
2272 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2273 struct pktgen_dev *pkt_dev)
2275 struct sk_buff *skb = NULL;
2277 struct udphdr *udph;
2279 struct ipv6hdr *iph;
2280 struct pktgen_hdr *pgh = NULL;
2282 /* Update any of the values, used when we're incrementing various
2285 mod_cur_headers(pkt_dev);
2287 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
2289 sprintf(pkt_dev->result, "No memory");
2293 skb_reserve(skb, 16);
2295 /* Reserve for ethernet and IP header */
2296 eth = (__u8 *) skb_push(skb, 14);
2297 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2298 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2300 memcpy(eth, pkt_dev->hh, 12);
2301 *(u16 *) & eth[12] = __constant_htons(ETH_P_IPV6);
2303 datalen = pkt_dev->cur_pkt_size - 14 - sizeof(struct ipv6hdr) - sizeof(struct udphdr); /* Eth + IPh + UDPh */
2305 if (datalen < sizeof(struct pktgen_hdr)) {
2306 datalen = sizeof(struct pktgen_hdr);
2307 if (net_ratelimit())
2308 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2312 udph->source = htons(pkt_dev->cur_udp_src);
2313 udph->dest = htons(pkt_dev->cur_udp_dst);
2314 udph->len = htons(datalen + sizeof(struct udphdr));
2315 udph->check = 0; /* No checksum */
2317 *(u32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
2319 iph->hop_limit = 32;
2321 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2322 iph->nexthdr = IPPROTO_UDP;
2324 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2325 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2327 skb->mac.raw = ((u8 *) iph) - 14;
2328 skb->protocol = __constant_htons(ETH_P_IPV6);
2330 skb->pkt_type = PACKET_HOST;
2332 if (pkt_dev->nfrags <= 0)
2333 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2335 int frags = pkt_dev->nfrags;
2338 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2340 if (frags > MAX_SKB_FRAGS)
2341 frags = MAX_SKB_FRAGS;
2342 if (datalen > frags * PAGE_SIZE) {
2343 skb_put(skb, datalen - frags * PAGE_SIZE);
2344 datalen = frags * PAGE_SIZE;
2348 while (datalen > 0) {
2349 struct page *page = alloc_pages(GFP_KERNEL, 0);
2350 skb_shinfo(skb)->frags[i].page = page;
2351 skb_shinfo(skb)->frags[i].page_offset = 0;
2352 skb_shinfo(skb)->frags[i].size =
2353 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2354 datalen -= skb_shinfo(skb)->frags[i].size;
2355 skb->len += skb_shinfo(skb)->frags[i].size;
2356 skb->data_len += skb_shinfo(skb)->frags[i].size;
2358 skb_shinfo(skb)->nr_frags = i;
2367 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2371 skb_shinfo(skb)->frags[i - 1].size -= rem;
2373 skb_shinfo(skb)->frags[i] =
2374 skb_shinfo(skb)->frags[i - 1];
2375 get_page(skb_shinfo(skb)->frags[i].page);
2376 skb_shinfo(skb)->frags[i].page =
2377 skb_shinfo(skb)->frags[i - 1].page;
2378 skb_shinfo(skb)->frags[i].page_offset +=
2379 skb_shinfo(skb)->frags[i - 1].size;
2380 skb_shinfo(skb)->frags[i].size = rem;
2382 skb_shinfo(skb)->nr_frags = i;
2386 /* Stamp the time, and sequence number, convert them to network byte order */
2387 /* should we update cloned packets too ? */
2389 struct timeval timestamp;
2391 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2392 pgh->seq_num = htonl(pkt_dev->seq_num);
2394 do_gettimeofday(×tamp);
2395 pgh->tv_sec = htonl(timestamp.tv_sec);
2396 pgh->tv_usec = htonl(timestamp.tv_usec);
2403 static inline struct sk_buff *fill_packet(struct net_device *odev,
2404 struct pktgen_dev *pkt_dev)
2406 if (pkt_dev->flags & F_IPV6)
2407 return fill_packet_ipv6(odev, pkt_dev);
2409 return fill_packet_ipv4(odev, pkt_dev);
2412 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2414 pkt_dev->seq_num = 1;
2415 pkt_dev->idle_acc = 0;
2417 pkt_dev->tx_bytes = 0;
2418 pkt_dev->errors = 0;
2421 /* Set up structure for sending pkts, clear counters */
2423 static void pktgen_run(struct pktgen_thread *t)
2425 struct pktgen_dev *pkt_dev;
2428 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2431 list_for_each_entry(pkt_dev, &t->if_list, list) {
2434 * setup odev and create initial packet.
2436 pktgen_setup_inject(pkt_dev);
2438 if (pkt_dev->odev) {
2439 pktgen_clear_counters(pkt_dev);
2440 pkt_dev->running = 1; /* Cranke yeself! */
2441 pkt_dev->skb = NULL;
2442 pkt_dev->started_at = getCurUs();
2443 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2444 pkt_dev->next_tx_ns = 0;
2446 strcpy(pkt_dev->result, "Starting");
2449 strcpy(pkt_dev->result, "Error starting");
2453 t->control &= ~(T_STOP);
2456 static void pktgen_stop_all_threads_ifs(void)
2458 struct pktgen_thread *t;
2460 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads_ifs.\n"));
2464 list_for_each_entry(t, &pktgen_threads, th_list)
2465 t->control |= T_STOP;
2470 static int thread_is_running(struct pktgen_thread *t)
2472 struct pktgen_dev *pkt_dev;
2475 list_for_each_entry(pkt_dev, &t->if_list, list)
2476 if (pkt_dev->running) {
2483 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2487 while (thread_is_running(t)) {
2491 msleep_interruptible(100);
2493 if (signal_pending(current))
2503 static int pktgen_wait_all_threads_run(void)
2505 struct pktgen_thread *t;
2510 list_for_each_entry(t, &pktgen_threads, th_list) {
2511 sig = pktgen_wait_thread_run(t);
2517 list_for_each_entry(t, &pktgen_threads, th_list)
2518 t->control |= (T_STOP);
2524 static void pktgen_run_all_threads(void)
2526 struct pktgen_thread *t;
2528 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2532 list_for_each_entry(t, &pktgen_threads, th_list)
2533 t->control |= (T_RUN);
2537 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2539 pktgen_wait_all_threads_run();
2542 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2544 __u64 total_us, bps, mbps, pps, idle;
2545 char *p = pkt_dev->result;
2547 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2549 idle = pkt_dev->idle_acc;
2551 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2552 (unsigned long long)total_us,
2553 (unsigned long long)(total_us - idle),
2554 (unsigned long long)idle,
2555 (unsigned long long)pkt_dev->sofar,
2556 pkt_dev->cur_pkt_size, nr_frags);
2558 pps = pkt_dev->sofar * USEC_PER_SEC;
2560 while ((total_us >> 32) != 0) {
2565 do_div(pps, total_us);
2567 bps = pps * 8 * pkt_dev->cur_pkt_size;
2570 do_div(mbps, 1000000);
2571 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2572 (unsigned long long)pps,
2573 (unsigned long long)mbps,
2574 (unsigned long long)bps,
2575 (unsigned long long)pkt_dev->errors);
2578 /* Set stopped-at timer, remove from running list, do counters & statistics */
2580 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2582 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
2584 if (!pkt_dev->running) {
2585 printk("pktgen: interface: %s is already stopped\n",
2590 pkt_dev->stopped_at = getCurUs();
2591 pkt_dev->running = 0;
2593 show_results(pkt_dev, nr_frags);
2598 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
2600 struct pktgen_dev *pkt_dev, *best = NULL;
2604 list_for_each_entry(pkt_dev, &t->if_list, list) {
2605 if (!pkt_dev->running)
2609 else if (pkt_dev->next_tx_us < best->next_tx_us)
2616 static void pktgen_stop(struct pktgen_thread *t)
2618 struct pktgen_dev *pkt_dev;
2620 PG_DEBUG(printk("pktgen: entering pktgen_stop\n"));
2624 list_for_each_entry(pkt_dev, &t->if_list, list) {
2625 pktgen_stop_device(pkt_dev);
2627 kfree_skb(pkt_dev->skb);
2629 pkt_dev->skb = NULL;
2636 * one of our devices needs to be removed - find it
2639 static void pktgen_rem_one_if(struct pktgen_thread *t)
2641 struct list_head *q, *n;
2642 struct pktgen_dev *cur;
2644 PG_DEBUG(printk("pktgen: entering pktgen_rem_one_if\n"));
2648 list_for_each_safe(q, n, &t->if_list) {
2649 cur = list_entry(q, struct pktgen_dev, list);
2651 if (!cur->removal_mark)
2655 kfree_skb(cur->skb);
2658 pktgen_remove_device(t, cur);
2666 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
2668 struct list_head *q, *n;
2669 struct pktgen_dev *cur;
2671 /* Remove all devices, free mem */
2673 PG_DEBUG(printk("pktgen: entering pktgen_rem_all_ifs\n"));
2676 list_for_each_safe(q, n, &t->if_list) {
2677 cur = list_entry(q, struct pktgen_dev, list);
2680 kfree_skb(cur->skb);
2683 pktgen_remove_device(t, cur);
2689 static void pktgen_rem_thread(struct pktgen_thread *t)
2691 /* Remove from the thread list */
2693 remove_proc_entry(t->name, pg_proc_dir);
2697 list_del(&t->th_list);
2702 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
2704 struct net_device *odev = NULL;
2705 __u64 idle_start = 0;
2708 odev = pkt_dev->odev;
2710 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
2714 if (now < pkt_dev->next_tx_us)
2715 spin(pkt_dev, pkt_dev->next_tx_us);
2717 /* This is max DELAY, this has special meaning of
2720 if (pkt_dev->delay_us == 0x7FFFFFFF) {
2721 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
2722 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
2727 if (netif_queue_stopped(odev) || need_resched()) {
2728 idle_start = getCurUs();
2730 if (!netif_running(odev)) {
2731 pktgen_stop_device(pkt_dev);
2733 kfree_skb(pkt_dev->skb);
2734 pkt_dev->skb = NULL;
2740 pkt_dev->idle_acc += getCurUs() - idle_start;
2742 if (netif_queue_stopped(odev)) {
2743 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2744 pkt_dev->next_tx_ns = 0;
2745 goto out; /* Try the next interface */
2749 if (pkt_dev->last_ok || !pkt_dev->skb) {
2750 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
2751 || (!pkt_dev->skb)) {
2752 /* build a new pkt */
2754 kfree_skb(pkt_dev->skb);
2756 pkt_dev->skb = fill_packet(odev, pkt_dev);
2757 if (pkt_dev->skb == NULL) {
2758 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
2760 pkt_dev->clone_count--; /* back out increment, OOM */
2763 pkt_dev->allocated_skbs++;
2764 pkt_dev->clone_count = 0; /* reset counter */
2768 spin_lock_bh(&odev->xmit_lock);
2769 if (!netif_queue_stopped(odev)) {
2771 atomic_inc(&(pkt_dev->skb->users));
2773 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
2774 if (likely(ret == NETDEV_TX_OK)) {
2775 pkt_dev->last_ok = 1;
2778 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
2780 } else if (ret == NETDEV_TX_LOCKED
2781 && (odev->features & NETIF_F_LLTX)) {
2784 } else { /* Retry it next time */
2786 atomic_dec(&(pkt_dev->skb->users));
2788 if (debug && net_ratelimit())
2789 printk(KERN_INFO "pktgen: Hard xmit error\n");
2792 pkt_dev->last_ok = 0;
2795 pkt_dev->next_tx_us = getCurUs();
2796 pkt_dev->next_tx_ns = 0;
2798 pkt_dev->next_tx_us += pkt_dev->delay_us;
2799 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
2801 if (pkt_dev->next_tx_ns > 1000) {
2802 pkt_dev->next_tx_us++;
2803 pkt_dev->next_tx_ns -= 1000;
2807 else { /* Retry it next time */
2808 pkt_dev->last_ok = 0;
2809 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2810 pkt_dev->next_tx_ns = 0;
2813 spin_unlock_bh(&odev->xmit_lock);
2815 /* If pkt_dev->count is zero, then run forever */
2816 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
2817 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
2818 idle_start = getCurUs();
2819 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
2820 if (signal_pending(current)) {
2825 pkt_dev->idle_acc += getCurUs() - idle_start;
2828 /* Done with this */
2829 pktgen_stop_device(pkt_dev);
2831 kfree_skb(pkt_dev->skb);
2832 pkt_dev->skb = NULL;
2838 * Main loop of the thread goes here
2841 static void pktgen_thread_worker(struct pktgen_thread *t)
2844 struct pktgen_dev *pkt_dev = NULL;
2847 u32 max_before_softirq;
2848 u32 tx_since_softirq = 0;
2850 daemonize("pktgen/%d", cpu);
2852 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
2854 spin_lock_irq(¤t->sighand->siglock);
2855 tmpsig = current->blocked;
2856 siginitsetinv(¤t->blocked,
2857 sigmask(SIGKILL) | sigmask(SIGSTOP) | sigmask(SIGTERM));
2859 recalc_sigpending();
2860 spin_unlock_irq(¤t->sighand->siglock);
2862 /* Migrate to the right CPU */
2863 set_cpus_allowed(current, cpumask_of_cpu(cpu));
2864 if (smp_processor_id() != cpu)
2867 init_waitqueue_head(&t->queue);
2869 t->control &= ~(T_TERMINATE);
2870 t->control &= ~(T_RUN);
2871 t->control &= ~(T_STOP);
2872 t->control &= ~(T_REMDEVALL);
2873 t->control &= ~(T_REMDEV);
2875 t->pid = current->pid;
2877 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
2879 max_before_softirq = t->max_before_softirq;
2881 __set_current_state(TASK_INTERRUPTIBLE);
2886 __set_current_state(TASK_RUNNING);
2889 * Get next dev to xmit -- if any.
2892 pkt_dev = next_to_run(t);
2896 pktgen_xmit(pkt_dev);
2899 * We like to stay RUNNING but must also give
2900 * others fair share.
2903 tx_since_softirq += pkt_dev->last_ok;
2905 if (tx_since_softirq > max_before_softirq) {
2906 if (local_softirq_pending())
2908 tx_since_softirq = 0;
2911 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
2912 schedule_timeout(HZ / 10);
2913 finish_wait(&(t->queue), &wait);
2917 * Back from sleep, either due to the timeout or signal.
2918 * We check if we have any "posted" work for us.
2921 if (t->control & T_TERMINATE || signal_pending(current))
2922 /* we received a request to terminate ourself */
2925 if (t->control & T_STOP) {
2927 t->control &= ~(T_STOP);
2930 if (t->control & T_RUN) {
2932 t->control &= ~(T_RUN);
2935 if (t->control & T_REMDEVALL) {
2936 pktgen_rem_all_ifs(t);
2937 t->control &= ~(T_REMDEVALL);
2940 if (t->control & T_REMDEV) {
2941 pktgen_rem_one_if(t);
2942 t->control &= ~(T_REMDEV);
2949 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
2952 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
2953 pktgen_rem_all_ifs(t);
2955 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
2956 pktgen_rem_thread(t);
2961 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
2964 struct pktgen_dev *p, *pkt_dev = NULL;
2967 list_for_each_entry(p, &t->if_list, list)
2968 if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
2974 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev));
2979 * Adds a dev at front of if_list.
2982 static int add_dev_to_thread(struct pktgen_thread *t,
2983 struct pktgen_dev *pkt_dev)
2989 if (pkt_dev->pg_thread) {
2990 printk("pktgen: ERROR: already assigned to a thread.\n");
2995 list_add(&pkt_dev->list, &t->if_list);
2996 pkt_dev->pg_thread = t;
2997 pkt_dev->running = 0;
3004 /* Called under thread lock */
3006 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3008 struct pktgen_dev *pkt_dev;
3009 struct proc_dir_entry *pe;
3011 /* We don't allow a device to be on several threads */
3013 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3015 printk("pktgen: ERROR: interface already used.\n");
3019 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3023 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3024 if (pkt_dev->flows == NULL) {
3028 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3030 pkt_dev->removal_mark = 0;
3031 pkt_dev->min_pkt_size = ETH_ZLEN;
3032 pkt_dev->max_pkt_size = ETH_ZLEN;
3033 pkt_dev->nfrags = 0;
3034 pkt_dev->clone_skb = pg_clone_skb_d;
3035 pkt_dev->delay_us = pg_delay_d / 1000;
3036 pkt_dev->delay_ns = pg_delay_d % 1000;
3037 pkt_dev->count = pg_count_d;
3039 pkt_dev->udp_src_min = 9; /* sink port */
3040 pkt_dev->udp_src_max = 9;
3041 pkt_dev->udp_dst_min = 9;
3042 pkt_dev->udp_dst_max = 9;
3044 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
3046 if (!pktgen_setup_dev(pkt_dev)) {
3047 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
3049 vfree(pkt_dev->flows);
3054 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
3056 printk("pktgen: cannot create %s/%s procfs entry.\n",
3057 PG_PROC_DIR, ifname);
3059 vfree(pkt_dev->flows);
3063 pe->proc_fops = &pktgen_if_fops;
3066 return add_dev_to_thread(t, pkt_dev);
3069 static struct pktgen_thread *__init pktgen_find_thread(const char *name)
3071 struct pktgen_thread *t;
3075 list_for_each_entry(t, &pktgen_threads, th_list)
3076 if (strcmp(t->name, name) == 0) {
3085 static int __init pktgen_create_thread(const char *name, int cpu)
3088 struct pktgen_thread *t = NULL;
3089 struct proc_dir_entry *pe;
3091 if (strlen(name) > 31) {
3092 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
3096 if (pktgen_find_thread(name)) {
3097 printk("pktgen: ERROR: thread: %s already exists\n", name);
3101 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3103 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3107 strcpy(t->name, name);
3108 spin_lock_init(&t->if_lock);
3111 pe = create_proc_entry(t->name, 0600, pg_proc_dir);
3113 printk("pktgen: cannot create %s/%s procfs entry.\n",
3114 PG_PROC_DIR, t->name);
3119 pe->proc_fops = &pktgen_thread_fops;
3122 INIT_LIST_HEAD(&t->if_list);
3124 list_add_tail(&t->th_list, &pktgen_threads);
3128 err = kernel_thread((void *)pktgen_thread_worker, (void *)t,
3129 CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
3131 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3132 remove_proc_entry(t->name, pg_proc_dir);
3133 list_del(&t->th_list);
3142 * Removes a device from the thread if_list.
3144 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3145 struct pktgen_dev *pkt_dev)
3147 struct list_head *q, *n;
3148 struct pktgen_dev *p;
3150 list_for_each_safe(q, n, &t->if_list) {
3151 p = list_entry(q, struct pktgen_dev, list);
3157 static int pktgen_remove_device(struct pktgen_thread *t,
3158 struct pktgen_dev *pkt_dev)
3161 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
3163 if (pkt_dev->running) {
3164 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3165 pktgen_stop_device(pkt_dev);
3168 /* Dis-associate from the interface */
3170 if (pkt_dev->odev) {
3171 dev_put(pkt_dev->odev);
3172 pkt_dev->odev = NULL;
3175 /* And update the thread if_list */
3177 _rem_dev_from_if_list(t, pkt_dev);
3179 /* Clean up proc file system */
3181 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
3184 vfree(pkt_dev->flows);
3189 static int __init pg_init(void)
3192 struct proc_dir_entry *pe;
3196 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3199 pg_proc_dir->owner = THIS_MODULE;
3201 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3203 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3205 proc_net_remove(PG_PROC_DIR);
3209 pe->proc_fops = &pktgen_fops;
3212 /* Register us to receive netdevice events */
3213 register_netdevice_notifier(&pktgen_notifier_block);
3215 for_each_online_cpu(cpu) {
3219 sprintf(buf, "kpktgend_%i", cpu);
3220 err = pktgen_create_thread(buf, cpu);
3222 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3226 if (list_empty(&pktgen_threads)) {
3227 printk("pktgen: ERROR: Initialization failed for all threads\n");
3228 unregister_netdevice_notifier(&pktgen_notifier_block);
3229 remove_proc_entry(PGCTRL, pg_proc_dir);
3230 proc_net_remove(PG_PROC_DIR);
3237 static void __exit pg_cleanup(void)
3239 struct pktgen_thread *t;
3240 struct list_head *q, *n;
3241 wait_queue_head_t queue;
3242 init_waitqueue_head(&queue);
3244 /* Stop all interfaces & threads */
3246 list_for_each_safe(q, n, &pktgen_threads) {
3247 t = list_entry(q, struct pktgen_thread, th_list);
3248 t->control |= (T_TERMINATE);
3250 wait_event_interruptible_timeout(queue, (t->removed == 1), HZ);
3253 /* Un-register us from receiving netdevice events */
3254 unregister_netdevice_notifier(&pktgen_notifier_block);
3256 /* Clean up proc file system */
3257 remove_proc_entry(PGCTRL, pg_proc_dir);
3258 proc_net_remove(PG_PROC_DIR);
3261 module_init(pg_init);
3262 module_exit(pg_cleanup);
3264 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3265 MODULE_DESCRIPTION("Packet Generator tool");
3266 MODULE_LICENSE("GPL");
3267 module_param(pg_count_d, int, 0);
3268 module_param(pg_delay_d, int, 0);
3269 module_param(pg_clone_skb_d, int, 0);
3270 module_param(debug, int, 0);