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 v2.66: 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 */
183 /* If lock -- can be removed after some work */
184 #define if_lock(t) spin_lock(&(t->if_lock));
185 #define if_unlock(t) spin_unlock(&(t->if_lock));
187 /* Used to help with determining the pkts on receive */
188 #define PKTGEN_MAGIC 0xbe9be955
189 #define PG_PROC_DIR "pktgen"
190 #define PGCTRL "pgctrl"
191 static struct proc_dir_entry *pg_proc_dir = NULL;
193 #define MAX_CFLOWS 65536
203 * Try to keep frequent/infrequent used vars. separated.
206 char ifname[IFNAMSIZ];
209 struct pktgen_thread *pg_thread; /* the owner */
210 struct list_head list; /* Used for chaining in the thread's run-queue */
212 int running; /* if this changes to false, the test will stop */
214 /* If min != max, then we will either do a linear iteration, or
215 * we will do a random selection from within the range.
218 int removal_mark; /* non-zero => the device is marked for
219 * removal by worker thread */
221 int min_pkt_size; /* = ETH_ZLEN; */
222 int max_pkt_size; /* = ETH_ZLEN; */
224 __u32 delay_us; /* Default delay */
226 __u64 count; /* Default No packets to send */
227 __u64 sofar; /* How many pkts we've sent so far */
228 __u64 tx_bytes; /* How many bytes we've transmitted */
229 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
231 /* runtime counters relating to clone_skb */
232 __u64 next_tx_us; /* timestamp of when to tx next */
235 __u64 allocated_skbs;
237 int last_ok; /* Was last skb sent?
238 * Or a failed transmit of some sort? This will keep
239 * sequence numbers in order, for example.
241 __u64 started_at; /* micro-seconds */
242 __u64 stopped_at; /* micro-seconds */
243 __u64 idle_acc; /* micro-seconds */
246 int clone_skb; /* Use multiple SKBs during packet gen. If this number
247 * is greater than 1, then that many copies of the same
248 * packet will be sent before a new packet is allocated.
249 * For instance, if you want to send 1024 identical packets
250 * before creating a new packet, set clone_skb to 1024.
253 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
254 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
255 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
256 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
258 struct in6_addr in6_saddr;
259 struct in6_addr in6_daddr;
260 struct in6_addr cur_in6_daddr;
261 struct in6_addr cur_in6_saddr;
263 struct in6_addr min_in6_daddr;
264 struct in6_addr max_in6_daddr;
265 struct in6_addr min_in6_saddr;
266 struct in6_addr max_in6_saddr;
268 /* If we're doing ranges, random or incremental, then this
269 * defines the min/max for those ranges.
271 __u32 saddr_min; /* inclusive, source IP address */
272 __u32 saddr_max; /* exclusive, source IP address */
273 __u32 daddr_min; /* inclusive, dest IP address */
274 __u32 daddr_max; /* exclusive, dest IP address */
276 __u16 udp_src_min; /* inclusive, source UDP port */
277 __u16 udp_src_max; /* exclusive, source UDP port */
278 __u16 udp_dst_min; /* inclusive, dest UDP port */
279 __u16 udp_dst_max; /* exclusive, dest UDP port */
281 __u32 src_mac_count; /* How many MACs to iterate through */
282 __u32 dst_mac_count; /* How many MACs to iterate through */
284 unsigned char dst_mac[ETH_ALEN];
285 unsigned char src_mac[ETH_ALEN];
287 __u32 cur_dst_mac_offset;
288 __u32 cur_src_mac_offset;
297 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
299 We fill in SRC address later
300 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
304 __u16 pad; /* pad out the hh struct to an even 16 bytes */
306 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
307 * are transmitting the same one multiple times
309 struct net_device *odev; /* The out-going device. Note that the device should
310 * have it's pg_info pointer pointing back to this
311 * device. This will be set when the user specifies
312 * the out-going device name (not when the inject is
313 * started as it used to do.)
315 struct flow_state *flows;
316 unsigned cflows; /* Concurrent flows (config) */
317 unsigned lflow; /* Flow length (config) */
318 unsigned nflows; /* accumulated flows (stats) */
328 struct pktgen_thread {
330 struct list_head if_list; /* All device here */
331 struct list_head th_list;
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;
391 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
395 /* End of hacks to deal with 64-bit math on x86 */
397 /** Convert to milliseconds */
398 static inline __u64 tv_to_ms(const struct timeval *tv)
400 __u64 ms = tv->tv_usec / 1000;
401 ms += (__u64) tv->tv_sec * (__u64) 1000;
405 /** Convert to micro-seconds */
406 static inline __u64 tv_to_us(const struct timeval *tv)
408 __u64 us = tv->tv_usec;
409 us += (__u64) tv->tv_sec * (__u64) 1000000;
413 static inline __u64 pg_div(__u64 n, __u32 base)
417 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
422 static inline __u64 pg_div64(__u64 n, __u64 base)
426 * How do we know if the architecture we are running on
427 * supports division with 64 bit base?
430 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
434 tmp = divremdi3(n, base, PG_DIV);
439 static inline u32 pktgen_random(void)
443 get_random_bytes(&n, 4);
450 static inline __u64 getCurMs(void)
453 do_gettimeofday(&tv);
454 return tv_to_ms(&tv);
457 static inline __u64 getCurUs(void)
460 do_gettimeofday(&tv);
461 return tv_to_us(&tv);
464 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
466 return tv_to_us(a) - tv_to_us(b);
469 /* old include end */
471 static char version[] __initdata = VERSION;
473 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
474 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
475 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
477 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
478 static void pktgen_run_all_threads(void);
479 static void pktgen_stop_all_threads_ifs(void);
480 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
481 static void pktgen_stop(struct pktgen_thread *t);
482 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
483 static int pktgen_mark_device(const char *ifname);
484 static unsigned int scan_ip6(const char *s, char ip[16]);
485 static unsigned int fmt_ip6(char *s, const char ip[16]);
487 /* Module parameters, defaults. */
488 static int pg_count_d = 1000; /* 1000 pkts by default */
489 static int pg_delay_d;
490 static int pg_clone_skb_d;
493 static DEFINE_MUTEX(pktgen_thread_lock);
494 static LIST_HEAD(pktgen_threads);
496 static struct notifier_block pktgen_notifier_block = {
497 .notifier_call = pktgen_device_event,
501 * /proc handling functions
505 static int pgctrl_show(struct seq_file *seq, void *v)
507 seq_puts(seq, VERSION);
511 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
512 size_t count, loff_t * ppos)
517 if (!capable(CAP_NET_ADMIN)) {
522 if (count > sizeof(data))
523 count = sizeof(data);
525 if (copy_from_user(data, buf, count)) {
529 data[count - 1] = 0; /* Make string */
531 if (!strcmp(data, "stop"))
532 pktgen_stop_all_threads_ifs();
534 else if (!strcmp(data, "start"))
535 pktgen_run_all_threads();
538 printk("pktgen: Unknown command: %s\n", data);
546 static int pgctrl_open(struct inode *inode, struct file *file)
548 return single_open(file, pgctrl_show, PDE(inode)->data);
551 static struct file_operations pktgen_fops = {
552 .owner = THIS_MODULE,
556 .write = pgctrl_write,
557 .release = single_release,
560 static int pktgen_if_show(struct seq_file *seq, void *v)
563 struct pktgen_dev *pkt_dev = seq->private;
566 __u64 now = getCurUs();
569 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
570 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
571 pkt_dev->max_pkt_size);
574 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
576 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
577 pkt_dev->clone_skb, pkt_dev->ifname);
579 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
582 if (pkt_dev->flags & F_IPV6) {
583 char b1[128], b2[128], b3[128];
584 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
585 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
586 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
588 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
591 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
592 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
593 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
595 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
600 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
601 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
604 seq_puts(seq, " src_mac: ");
606 if (is_zero_ether_addr(pkt_dev->src_mac))
607 for (i = 0; i < 6; i++)
608 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
611 for (i = 0; i < 6; i++)
612 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
615 seq_printf(seq, "dst_mac: ");
616 for (i = 0; i < 6; i++)
617 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
618 i == 5 ? "\n" : ":");
621 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
622 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
623 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
626 " src_mac_count: %d dst_mac_count: %d \n Flags: ",
627 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
629 if (pkt_dev->flags & F_IPV6)
630 seq_printf(seq, "IPV6 ");
632 if (pkt_dev->flags & F_IPSRC_RND)
633 seq_printf(seq, "IPSRC_RND ");
635 if (pkt_dev->flags & F_IPDST_RND)
636 seq_printf(seq, "IPDST_RND ");
638 if (pkt_dev->flags & F_TXSIZE_RND)
639 seq_printf(seq, "TXSIZE_RND ");
641 if (pkt_dev->flags & F_UDPSRC_RND)
642 seq_printf(seq, "UDPSRC_RND ");
644 if (pkt_dev->flags & F_UDPDST_RND)
645 seq_printf(seq, "UDPDST_RND ");
647 if (pkt_dev->flags & F_MACSRC_RND)
648 seq_printf(seq, "MACSRC_RND ");
650 if (pkt_dev->flags & F_MACDST_RND)
651 seq_printf(seq, "MACDST_RND ");
655 sa = pkt_dev->started_at;
656 stopped = pkt_dev->stopped_at;
657 if (pkt_dev->running)
658 stopped = now; /* not really stopped, more like last-running-at */
661 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
662 (unsigned long long)pkt_dev->sofar,
663 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
664 (unsigned long long)stopped,
665 (unsigned long long)pkt_dev->idle_acc);
668 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
669 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
670 pkt_dev->cur_src_mac_offset);
672 if (pkt_dev->flags & F_IPV6) {
673 char b1[128], b2[128];
674 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
675 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
676 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
678 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
679 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
681 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
682 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
684 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
686 if (pkt_dev->result[0])
687 seq_printf(seq, "Result: %s\n", pkt_dev->result);
689 seq_printf(seq, "Result: Idle\n");
694 static int count_trail_chars(const char __user * user_buffer,
699 for (i = 0; i < maxlen; i++) {
701 if (get_user(c, &user_buffer[i]))
719 static unsigned long num_arg(const char __user * user_buffer,
720 unsigned long maxlen, unsigned long *num)
725 for (; i < maxlen; i++) {
727 if (get_user(c, &user_buffer[i]))
729 if ((c >= '0') && (c <= '9')) {
738 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
742 for (; i < maxlen; i++) {
744 if (get_user(c, &user_buffer[i]))
762 static ssize_t pktgen_if_write(struct file *file,
763 const char __user * user_buffer, size_t count,
766 struct seq_file *seq = (struct seq_file *)file->private_data;
767 struct pktgen_dev *pkt_dev = seq->private;
769 char name[16], valstr[32];
770 unsigned long value = 0;
771 char *pg_result = NULL;
775 pg_result = &(pkt_dev->result[0]);
778 printk("pktgen: wrong command format\n");
783 tmp = count_trail_chars(&user_buffer[i], max);
785 printk("pktgen: illegal format\n");
790 /* Read variable name */
792 len = strn_len(&user_buffer[i], sizeof(name) - 1);
796 memset(name, 0, sizeof(name));
797 if (copy_from_user(name, &user_buffer[i], len))
802 len = count_trail_chars(&user_buffer[i], max);
810 if (copy_from_user(tb, user_buffer, count))
813 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
814 (unsigned long)count, tb);
817 if (!strcmp(name, "min_pkt_size")) {
818 len = num_arg(&user_buffer[i], 10, &value);
823 if (value < 14 + 20 + 8)
825 if (value != pkt_dev->min_pkt_size) {
826 pkt_dev->min_pkt_size = value;
827 pkt_dev->cur_pkt_size = value;
829 sprintf(pg_result, "OK: min_pkt_size=%u",
830 pkt_dev->min_pkt_size);
834 if (!strcmp(name, "max_pkt_size")) {
835 len = num_arg(&user_buffer[i], 10, &value);
840 if (value < 14 + 20 + 8)
842 if (value != pkt_dev->max_pkt_size) {
843 pkt_dev->max_pkt_size = value;
844 pkt_dev->cur_pkt_size = value;
846 sprintf(pg_result, "OK: max_pkt_size=%u",
847 pkt_dev->max_pkt_size);
851 /* Shortcut for min = max */
853 if (!strcmp(name, "pkt_size")) {
854 len = num_arg(&user_buffer[i], 10, &value);
859 if (value < 14 + 20 + 8)
861 if (value != pkt_dev->min_pkt_size) {
862 pkt_dev->min_pkt_size = value;
863 pkt_dev->max_pkt_size = value;
864 pkt_dev->cur_pkt_size = value;
866 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
870 if (!strcmp(name, "debug")) {
871 len = num_arg(&user_buffer[i], 10, &value);
877 sprintf(pg_result, "OK: debug=%u", debug);
881 if (!strcmp(name, "frags")) {
882 len = num_arg(&user_buffer[i], 10, &value);
887 pkt_dev->nfrags = value;
888 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
891 if (!strcmp(name, "delay")) {
892 len = num_arg(&user_buffer[i], 10, &value);
897 if (value == 0x7FFFFFFF) {
898 pkt_dev->delay_us = 0x7FFFFFFF;
899 pkt_dev->delay_ns = 0;
901 pkt_dev->delay_us = value / 1000;
902 pkt_dev->delay_ns = value % 1000;
904 sprintf(pg_result, "OK: delay=%u",
905 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
908 if (!strcmp(name, "udp_src_min")) {
909 len = num_arg(&user_buffer[i], 10, &value);
914 if (value != pkt_dev->udp_src_min) {
915 pkt_dev->udp_src_min = value;
916 pkt_dev->cur_udp_src = value;
918 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
921 if (!strcmp(name, "udp_dst_min")) {
922 len = num_arg(&user_buffer[i], 10, &value);
927 if (value != pkt_dev->udp_dst_min) {
928 pkt_dev->udp_dst_min = value;
929 pkt_dev->cur_udp_dst = value;
931 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
934 if (!strcmp(name, "udp_src_max")) {
935 len = num_arg(&user_buffer[i], 10, &value);
940 if (value != pkt_dev->udp_src_max) {
941 pkt_dev->udp_src_max = value;
942 pkt_dev->cur_udp_src = value;
944 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
947 if (!strcmp(name, "udp_dst_max")) {
948 len = num_arg(&user_buffer[i], 10, &value);
953 if (value != pkt_dev->udp_dst_max) {
954 pkt_dev->udp_dst_max = value;
955 pkt_dev->cur_udp_dst = value;
957 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
960 if (!strcmp(name, "clone_skb")) {
961 len = num_arg(&user_buffer[i], 10, &value);
966 pkt_dev->clone_skb = value;
968 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
971 if (!strcmp(name, "count")) {
972 len = num_arg(&user_buffer[i], 10, &value);
977 pkt_dev->count = value;
978 sprintf(pg_result, "OK: count=%llu",
979 (unsigned long long)pkt_dev->count);
982 if (!strcmp(name, "src_mac_count")) {
983 len = num_arg(&user_buffer[i], 10, &value);
988 if (pkt_dev->src_mac_count != value) {
989 pkt_dev->src_mac_count = value;
990 pkt_dev->cur_src_mac_offset = 0;
992 sprintf(pg_result, "OK: src_mac_count=%d",
993 pkt_dev->src_mac_count);
996 if (!strcmp(name, "dst_mac_count")) {
997 len = num_arg(&user_buffer[i], 10, &value);
1002 if (pkt_dev->dst_mac_count != value) {
1003 pkt_dev->dst_mac_count = value;
1004 pkt_dev->cur_dst_mac_offset = 0;
1006 sprintf(pg_result, "OK: dst_mac_count=%d",
1007 pkt_dev->dst_mac_count);
1010 if (!strcmp(name, "flag")) {
1013 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1017 if (copy_from_user(f, &user_buffer[i], len))
1020 if (strcmp(f, "IPSRC_RND") == 0)
1021 pkt_dev->flags |= F_IPSRC_RND;
1023 else if (strcmp(f, "!IPSRC_RND") == 0)
1024 pkt_dev->flags &= ~F_IPSRC_RND;
1026 else if (strcmp(f, "TXSIZE_RND") == 0)
1027 pkt_dev->flags |= F_TXSIZE_RND;
1029 else if (strcmp(f, "!TXSIZE_RND") == 0)
1030 pkt_dev->flags &= ~F_TXSIZE_RND;
1032 else if (strcmp(f, "IPDST_RND") == 0)
1033 pkt_dev->flags |= F_IPDST_RND;
1035 else if (strcmp(f, "!IPDST_RND") == 0)
1036 pkt_dev->flags &= ~F_IPDST_RND;
1038 else if (strcmp(f, "UDPSRC_RND") == 0)
1039 pkt_dev->flags |= F_UDPSRC_RND;
1041 else if (strcmp(f, "!UDPSRC_RND") == 0)
1042 pkt_dev->flags &= ~F_UDPSRC_RND;
1044 else if (strcmp(f, "UDPDST_RND") == 0)
1045 pkt_dev->flags |= F_UDPDST_RND;
1047 else if (strcmp(f, "!UDPDST_RND") == 0)
1048 pkt_dev->flags &= ~F_UDPDST_RND;
1050 else if (strcmp(f, "MACSRC_RND") == 0)
1051 pkt_dev->flags |= F_MACSRC_RND;
1053 else if (strcmp(f, "!MACSRC_RND") == 0)
1054 pkt_dev->flags &= ~F_MACSRC_RND;
1056 else if (strcmp(f, "MACDST_RND") == 0)
1057 pkt_dev->flags |= F_MACDST_RND;
1059 else if (strcmp(f, "!MACDST_RND") == 0)
1060 pkt_dev->flags &= ~F_MACDST_RND;
1064 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1066 "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1069 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1072 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1073 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1078 if (copy_from_user(buf, &user_buffer[i], len))
1081 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1082 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1083 strncpy(pkt_dev->dst_min, buf, len);
1084 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1085 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1088 printk("pktgen: dst_min set to: %s\n",
1091 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1094 if (!strcmp(name, "dst_max")) {
1095 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1100 if (copy_from_user(buf, &user_buffer[i], len))
1104 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1105 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1106 strncpy(pkt_dev->dst_max, buf, len);
1107 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1108 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1111 printk("pktgen: dst_max set to: %s\n",
1114 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1117 if (!strcmp(name, "dst6")) {
1118 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1122 pkt_dev->flags |= F_IPV6;
1124 if (copy_from_user(buf, &user_buffer[i], len))
1128 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1129 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1131 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1134 printk("pktgen: dst6 set to: %s\n", buf);
1137 sprintf(pg_result, "OK: dst6=%s", buf);
1140 if (!strcmp(name, "dst6_min")) {
1141 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1145 pkt_dev->flags |= F_IPV6;
1147 if (copy_from_user(buf, &user_buffer[i], len))
1151 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1152 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1154 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1155 &pkt_dev->min_in6_daddr);
1157 printk("pktgen: dst6_min set to: %s\n", buf);
1160 sprintf(pg_result, "OK: dst6_min=%s", buf);
1163 if (!strcmp(name, "dst6_max")) {
1164 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1168 pkt_dev->flags |= F_IPV6;
1170 if (copy_from_user(buf, &user_buffer[i], len))
1174 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1175 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1178 printk("pktgen: dst6_max set to: %s\n", buf);
1181 sprintf(pg_result, "OK: dst6_max=%s", buf);
1184 if (!strcmp(name, "src6")) {
1185 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1189 pkt_dev->flags |= F_IPV6;
1191 if (copy_from_user(buf, &user_buffer[i], len))
1195 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1196 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1198 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1201 printk("pktgen: src6 set to: %s\n", buf);
1204 sprintf(pg_result, "OK: src6=%s", buf);
1207 if (!strcmp(name, "src_min")) {
1208 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1212 if (copy_from_user(buf, &user_buffer[i], len))
1215 if (strcmp(buf, pkt_dev->src_min) != 0) {
1216 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1217 strncpy(pkt_dev->src_min, buf, len);
1218 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1219 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1222 printk("pktgen: src_min set to: %s\n",
1225 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1228 if (!strcmp(name, "src_max")) {
1229 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1233 if (copy_from_user(buf, &user_buffer[i], len))
1236 if (strcmp(buf, pkt_dev->src_max) != 0) {
1237 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1238 strncpy(pkt_dev->src_max, buf, len);
1239 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1240 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1243 printk("pktgen: src_max set to: %s\n",
1246 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1249 if (!strcmp(name, "dst_mac")) {
1251 unsigned char old_dmac[ETH_ALEN];
1252 unsigned char *m = pkt_dev->dst_mac;
1253 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1255 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1259 memset(valstr, 0, sizeof(valstr));
1260 if (copy_from_user(valstr, &user_buffer[i], len))
1264 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1265 if (*v >= '0' && *v <= '9') {
1269 if (*v >= 'A' && *v <= 'F') {
1271 *m += *v - 'A' + 10;
1273 if (*v >= 'a' && *v <= 'f') {
1275 *m += *v - 'a' + 10;
1283 /* Set up Dest MAC */
1284 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1285 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1287 sprintf(pg_result, "OK: dstmac");
1290 if (!strcmp(name, "src_mac")) {
1292 unsigned char *m = pkt_dev->src_mac;
1294 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1298 memset(valstr, 0, sizeof(valstr));
1299 if (copy_from_user(valstr, &user_buffer[i], len))
1303 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1304 if (*v >= '0' && *v <= '9') {
1308 if (*v >= 'A' && *v <= 'F') {
1310 *m += *v - 'A' + 10;
1312 if (*v >= 'a' && *v <= 'f') {
1314 *m += *v - 'a' + 10;
1322 sprintf(pg_result, "OK: srcmac");
1326 if (!strcmp(name, "clear_counters")) {
1327 pktgen_clear_counters(pkt_dev);
1328 sprintf(pg_result, "OK: Clearing counters.\n");
1332 if (!strcmp(name, "flows")) {
1333 len = num_arg(&user_buffer[i], 10, &value);
1338 if (value > MAX_CFLOWS)
1341 pkt_dev->cflows = value;
1342 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1346 if (!strcmp(name, "flowlen")) {
1347 len = num_arg(&user_buffer[i], 10, &value);
1352 pkt_dev->lflow = value;
1353 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1357 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1361 static int pktgen_if_open(struct inode *inode, struct file *file)
1363 return single_open(file, pktgen_if_show, PDE(inode)->data);
1366 static struct file_operations pktgen_if_fops = {
1367 .owner = THIS_MODULE,
1368 .open = pktgen_if_open,
1370 .llseek = seq_lseek,
1371 .write = pktgen_if_write,
1372 .release = single_release,
1375 static int pktgen_thread_show(struct seq_file *seq, void *v)
1377 struct pktgen_thread *t = seq->private;
1378 struct pktgen_dev *pkt_dev;
1382 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1383 t->name, t->max_before_softirq);
1385 seq_printf(seq, "Running: ");
1388 list_for_each_entry(pkt_dev, &t->if_list, list)
1389 if (pkt_dev->running)
1390 seq_printf(seq, "%s ", pkt_dev->ifname);
1392 seq_printf(seq, "\nStopped: ");
1394 list_for_each_entry(pkt_dev, &t->if_list, list)
1395 if (!pkt_dev->running)
1396 seq_printf(seq, "%s ", pkt_dev->ifname);
1399 seq_printf(seq, "\nResult: %s\n", t->result);
1401 seq_printf(seq, "\nResult: NA\n");
1408 static ssize_t pktgen_thread_write(struct file *file,
1409 const char __user * user_buffer,
1410 size_t count, loff_t * offset)
1412 struct seq_file *seq = (struct seq_file *)file->private_data;
1413 struct pktgen_thread *t = seq->private;
1414 int i = 0, max, len, ret;
1417 unsigned long value = 0;
1420 // sprintf(pg_result, "Wrong command format");
1425 len = count_trail_chars(&user_buffer[i], max);
1431 /* Read variable name */
1433 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1437 memset(name, 0, sizeof(name));
1438 if (copy_from_user(name, &user_buffer[i], len))
1443 len = count_trail_chars(&user_buffer[i], max);
1450 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1453 printk("pktgen: ERROR: No thread\n");
1458 pg_result = &(t->result[0]);
1460 if (!strcmp(name, "add_device")) {
1463 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1468 if (copy_from_user(f, &user_buffer[i], len))
1471 mutex_lock(&pktgen_thread_lock);
1472 pktgen_add_device(t, f);
1473 mutex_unlock(&pktgen_thread_lock);
1475 sprintf(pg_result, "OK: add_device=%s", f);
1479 if (!strcmp(name, "rem_device_all")) {
1480 mutex_lock(&pktgen_thread_lock);
1481 t->control |= T_REMDEVALL;
1482 mutex_unlock(&pktgen_thread_lock);
1483 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1485 sprintf(pg_result, "OK: rem_device_all");
1489 if (!strcmp(name, "max_before_softirq")) {
1490 len = num_arg(&user_buffer[i], 10, &value);
1491 mutex_lock(&pktgen_thread_lock);
1492 t->max_before_softirq = value;
1493 mutex_unlock(&pktgen_thread_lock);
1495 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1504 static int pktgen_thread_open(struct inode *inode, struct file *file)
1506 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1509 static struct file_operations pktgen_thread_fops = {
1510 .owner = THIS_MODULE,
1511 .open = pktgen_thread_open,
1513 .llseek = seq_lseek,
1514 .write = pktgen_thread_write,
1515 .release = single_release,
1518 /* Think find or remove for NN */
1519 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1521 struct pktgen_thread *t;
1522 struct pktgen_dev *pkt_dev = NULL;
1524 list_for_each_entry(t, &pktgen_threads, th_list) {
1525 pkt_dev = pktgen_find_dev(t, ifname);
1529 pkt_dev->removal_mark = 1;
1530 t->control |= T_REMDEV;
1540 * mark a device for removal
1542 static int pktgen_mark_device(const char *ifname)
1544 struct pktgen_dev *pkt_dev = NULL;
1545 const int max_tries = 10, msec_per_try = 125;
1549 mutex_lock(&pktgen_thread_lock);
1550 PG_DEBUG(printk("pktgen: pktgen_mark_device marking %s for removal\n",
1555 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1556 if (pkt_dev == NULL)
1557 break; /* success */
1559 mutex_unlock(&pktgen_thread_lock);
1560 PG_DEBUG(printk("pktgen: pktgen_mark_device waiting for %s "
1561 "to disappear....\n", ifname));
1562 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1563 mutex_lock(&pktgen_thread_lock);
1565 if (++i >= max_tries) {
1566 printk("pktgen_mark_device: timed out after waiting "
1567 "%d msec for device %s to be removed\n",
1568 msec_per_try * i, ifname);
1575 mutex_unlock(&pktgen_thread_lock);
1580 static int pktgen_device_event(struct notifier_block *unused,
1581 unsigned long event, void *ptr)
1583 struct net_device *dev = (struct net_device *)(ptr);
1585 /* It is OK that we do not hold the group lock right now,
1586 * as we run under the RTNL lock.
1590 case NETDEV_CHANGEADDR:
1591 case NETDEV_GOING_DOWN:
1594 /* Ignore for now */
1597 case NETDEV_UNREGISTER:
1598 pktgen_mark_device(dev->name);
1605 /* Associate pktgen_dev with a device. */
1607 static struct net_device *pktgen_setup_dev(struct pktgen_dev *pkt_dev)
1609 struct net_device *odev;
1611 /* Clean old setups */
1613 if (pkt_dev->odev) {
1614 dev_put(pkt_dev->odev);
1615 pkt_dev->odev = NULL;
1618 odev = dev_get_by_name(pkt_dev->ifname);
1621 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1624 if (odev->type != ARPHRD_ETHER) {
1625 printk("pktgen: not an ethernet device: \"%s\"\n",
1629 if (!netif_running(odev)) {
1630 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1633 pkt_dev->odev = odev;
1635 return pkt_dev->odev;
1644 /* Read pkt_dev from the interface and set up internal pktgen_dev
1645 * structure to have the right information to create/send packets
1647 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1649 /* Try once more, just in case it works now. */
1651 pktgen_setup_dev(pkt_dev);
1653 if (!pkt_dev->odev) {
1654 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1655 sprintf(pkt_dev->result,
1656 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1660 /* Default to the interface's mac if not explicitly set. */
1662 if (is_zero_ether_addr(pkt_dev->src_mac))
1663 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1665 /* Set up Dest MAC */
1666 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1668 /* Set up pkt size */
1669 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1671 if (pkt_dev->flags & F_IPV6) {
1673 * Skip this automatic address setting until locks or functions
1678 int i, set = 0, err = 1;
1679 struct inet6_dev *idev;
1681 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1682 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1690 * Use linklevel address if unconfigured.
1692 * use ipv6_get_lladdr if/when it's get exported
1695 read_lock(&addrconf_lock);
1696 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1697 struct inet6_ifaddr *ifp;
1699 read_lock_bh(&idev->lock);
1700 for (ifp = idev->addr_list; ifp;
1701 ifp = ifp->if_next) {
1702 if (ifp->scope == IFA_LINK
1704 flags & IFA_F_TENTATIVE)) {
1705 ipv6_addr_copy(&pkt_dev->
1712 read_unlock_bh(&idev->lock);
1714 read_unlock(&addrconf_lock);
1716 printk("pktgen: ERROR: IPv6 link address not availble.\n");
1720 pkt_dev->saddr_min = 0;
1721 pkt_dev->saddr_max = 0;
1722 if (strlen(pkt_dev->src_min) == 0) {
1724 struct in_device *in_dev;
1727 in_dev = __in_dev_get_rcu(pkt_dev->odev);
1729 if (in_dev->ifa_list) {
1730 pkt_dev->saddr_min =
1731 in_dev->ifa_list->ifa_address;
1732 pkt_dev->saddr_max = pkt_dev->saddr_min;
1737 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1738 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1741 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1742 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1744 /* Initialize current values. */
1745 pkt_dev->cur_dst_mac_offset = 0;
1746 pkt_dev->cur_src_mac_offset = 0;
1747 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1748 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1749 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1750 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1751 pkt_dev->nflows = 0;
1754 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
1759 start = now = getCurUs();
1760 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
1761 while (now < spin_until_us) {
1762 /* TODO: optimize sleeping behavior */
1763 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
1764 schedule_timeout_interruptible(1);
1765 else if (spin_until_us - now > 100) {
1767 if (!pkt_dev->running)
1776 pkt_dev->idle_acc += now - start;
1779 /* Increment/randomize headers according to flags and current values
1780 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
1782 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
1788 if (pkt_dev->cflows) {
1789 flow = pktgen_random() % pkt_dev->cflows;
1791 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
1792 pkt_dev->flows[flow].count = 0;
1795 /* Deal with source MAC */
1796 if (pkt_dev->src_mac_count > 1) {
1800 if (pkt_dev->flags & F_MACSRC_RND)
1801 mc = pktgen_random() % (pkt_dev->src_mac_count);
1803 mc = pkt_dev->cur_src_mac_offset++;
1804 if (pkt_dev->cur_src_mac_offset >
1805 pkt_dev->src_mac_count)
1806 pkt_dev->cur_src_mac_offset = 0;
1809 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
1810 pkt_dev->hh[11] = tmp;
1811 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1812 pkt_dev->hh[10] = tmp;
1813 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1814 pkt_dev->hh[9] = tmp;
1815 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1816 pkt_dev->hh[8] = tmp;
1817 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
1818 pkt_dev->hh[7] = tmp;
1821 /* Deal with Destination MAC */
1822 if (pkt_dev->dst_mac_count > 1) {
1826 if (pkt_dev->flags & F_MACDST_RND)
1827 mc = pktgen_random() % (pkt_dev->dst_mac_count);
1830 mc = pkt_dev->cur_dst_mac_offset++;
1831 if (pkt_dev->cur_dst_mac_offset >
1832 pkt_dev->dst_mac_count) {
1833 pkt_dev->cur_dst_mac_offset = 0;
1837 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
1838 pkt_dev->hh[5] = tmp;
1839 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1840 pkt_dev->hh[4] = tmp;
1841 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1842 pkt_dev->hh[3] = tmp;
1843 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1844 pkt_dev->hh[2] = tmp;
1845 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
1846 pkt_dev->hh[1] = tmp;
1849 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
1850 if (pkt_dev->flags & F_UDPSRC_RND)
1851 pkt_dev->cur_udp_src =
1853 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) +
1854 pkt_dev->udp_src_min);
1857 pkt_dev->cur_udp_src++;
1858 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
1859 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1863 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
1864 if (pkt_dev->flags & F_UDPDST_RND) {
1865 pkt_dev->cur_udp_dst =
1867 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) +
1868 pkt_dev->udp_dst_min);
1870 pkt_dev->cur_udp_dst++;
1871 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1872 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1876 if (!(pkt_dev->flags & F_IPV6)) {
1878 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
1882 if (pkt_dev->flags & F_IPSRC_RND)
1883 t = ((pktgen_random() % (imx - imn)) + imn);
1885 t = ntohl(pkt_dev->cur_saddr);
1891 pkt_dev->cur_saddr = htonl(t);
1894 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
1895 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
1898 if ((imn = ntohl(pkt_dev->daddr_min)) < (imx =
1903 if (pkt_dev->flags & F_IPDST_RND) {
1905 t = ((pktgen_random() % (imx - imn)) +
1909 while (LOOPBACK(t) || MULTICAST(t)
1910 || BADCLASS(t) || ZERONET(t)
1911 || LOCAL_MCAST(t)) {
1912 t = ((pktgen_random() %
1913 (imx - imn)) + imn);
1916 pkt_dev->cur_daddr = t;
1920 t = ntohl(pkt_dev->cur_daddr);
1925 pkt_dev->cur_daddr = htonl(t);
1928 if (pkt_dev->cflows) {
1929 pkt_dev->flows[flow].cur_daddr =
1934 } else { /* IPV6 * */
1936 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
1937 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
1938 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
1939 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
1943 /* Only random destinations yet */
1945 for (i = 0; i < 4; i++) {
1946 pkt_dev->cur_in6_daddr.s6_addr32[i] =
1948 pkt_dev->min_in6_daddr.s6_addr32[i]) &
1949 pkt_dev->max_in6_daddr.s6_addr32[i]);
1954 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
1956 if (pkt_dev->flags & F_TXSIZE_RND) {
1957 t = ((pktgen_random() %
1958 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
1959 + pkt_dev->min_pkt_size);
1961 t = pkt_dev->cur_pkt_size + 1;
1962 if (t > pkt_dev->max_pkt_size)
1963 t = pkt_dev->min_pkt_size;
1965 pkt_dev->cur_pkt_size = t;
1968 pkt_dev->flows[flow].count++;
1971 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
1972 struct pktgen_dev *pkt_dev)
1974 struct sk_buff *skb = NULL;
1976 struct udphdr *udph;
1979 struct pktgen_hdr *pgh = NULL;
1981 /* Update any of the values, used when we're incrementing various
1984 mod_cur_headers(pkt_dev);
1986 datalen = (odev->hard_header_len + 16) & ~0xf;
1987 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen, GFP_ATOMIC);
1989 sprintf(pkt_dev->result, "No memory");
1993 skb_reserve(skb, datalen);
1995 /* Reserve for ethernet and IP header */
1996 eth = (__u8 *) skb_push(skb, 14);
1997 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
1998 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2000 memcpy(eth, pkt_dev->hh, 12);
2001 *(u16 *) & eth[12] = __constant_htons(ETH_P_IP);
2003 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
2004 if (datalen < sizeof(struct pktgen_hdr))
2005 datalen = sizeof(struct pktgen_hdr);
2007 udph->source = htons(pkt_dev->cur_udp_src);
2008 udph->dest = htons(pkt_dev->cur_udp_dst);
2009 udph->len = htons(datalen + 8); /* DATA + udphdr */
2010 udph->check = 0; /* No checksum */
2016 iph->protocol = IPPROTO_UDP; /* UDP */
2017 iph->saddr = pkt_dev->cur_saddr;
2018 iph->daddr = pkt_dev->cur_daddr;
2020 iplen = 20 + 8 + datalen;
2021 iph->tot_len = htons(iplen);
2023 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2024 skb->protocol = __constant_htons(ETH_P_IP);
2025 skb->mac.raw = ((u8 *) iph) - 14;
2027 skb->pkt_type = PACKET_HOST;
2029 if (pkt_dev->nfrags <= 0)
2030 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2032 int frags = pkt_dev->nfrags;
2035 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2037 if (frags > MAX_SKB_FRAGS)
2038 frags = MAX_SKB_FRAGS;
2039 if (datalen > frags * PAGE_SIZE) {
2040 skb_put(skb, datalen - frags * PAGE_SIZE);
2041 datalen = frags * PAGE_SIZE;
2045 while (datalen > 0) {
2046 struct page *page = alloc_pages(GFP_KERNEL, 0);
2047 skb_shinfo(skb)->frags[i].page = page;
2048 skb_shinfo(skb)->frags[i].page_offset = 0;
2049 skb_shinfo(skb)->frags[i].size =
2050 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2051 datalen -= skb_shinfo(skb)->frags[i].size;
2052 skb->len += skb_shinfo(skb)->frags[i].size;
2053 skb->data_len += skb_shinfo(skb)->frags[i].size;
2055 skb_shinfo(skb)->nr_frags = i;
2064 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2068 skb_shinfo(skb)->frags[i - 1].size -= rem;
2070 skb_shinfo(skb)->frags[i] =
2071 skb_shinfo(skb)->frags[i - 1];
2072 get_page(skb_shinfo(skb)->frags[i].page);
2073 skb_shinfo(skb)->frags[i].page =
2074 skb_shinfo(skb)->frags[i - 1].page;
2075 skb_shinfo(skb)->frags[i].page_offset +=
2076 skb_shinfo(skb)->frags[i - 1].size;
2077 skb_shinfo(skb)->frags[i].size = rem;
2079 skb_shinfo(skb)->nr_frags = i;
2083 /* Stamp the time, and sequence number, convert them to network byte order */
2086 struct timeval timestamp;
2088 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2089 pgh->seq_num = htonl(pkt_dev->seq_num);
2091 do_gettimeofday(×tamp);
2092 pgh->tv_sec = htonl(timestamp.tv_sec);
2093 pgh->tv_usec = htonl(timestamp.tv_usec);
2101 * scan_ip6, fmt_ip taken from dietlibc-0.21
2102 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2104 * Slightly modified for kernel.
2105 * Should be candidate for net/ipv4/utils.c
2109 static unsigned int scan_ip6(const char *s, char ip[16])
2112 unsigned int len = 0;
2115 unsigned int prefixlen = 0;
2116 unsigned int suffixlen = 0;
2119 for (i = 0; i < 16; i++)
2125 if (s[1] == ':') { /* Found "::", skip to part 2 */
2134 u = simple_strtoul(s, &tmp, 16);
2140 if (prefixlen == 12 && s[i] == '.') {
2142 /* the last 4 bytes may be written as IPv4 address */
2145 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2148 ip[prefixlen++] = (u >> 8);
2149 ip[prefixlen++] = (u & 255);
2152 if (prefixlen == 16)
2156 /* part 2, after "::" */
2163 } else if (suffixlen != 0)
2167 u = simple_strtol(s, &tmp, 16);
2175 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2177 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2183 suffix[suffixlen++] = (u >> 8);
2184 suffix[suffixlen++] = (u & 255);
2187 if (prefixlen + suffixlen == 16)
2190 for (i = 0; i < suffixlen; i++)
2191 ip[16 - suffixlen + i] = suffix[i];
2195 static char tohex(char hexdigit)
2197 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2200 static int fmt_xlong(char *s, unsigned int i)
2203 *s = tohex((i >> 12) & 0xf);
2204 if (s != bak || *s != '0')
2206 *s = tohex((i >> 8) & 0xf);
2207 if (s != bak || *s != '0')
2209 *s = tohex((i >> 4) & 0xf);
2210 if (s != bak || *s != '0')
2212 *s = tohex(i & 0xf);
2216 static unsigned int fmt_ip6(char *s, const char ip[16])
2221 unsigned int compressing;
2226 for (j = 0; j < 16; j += 2) {
2228 #ifdef V4MAPPEDPREFIX
2229 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2230 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2235 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2236 (unsigned long)(unsigned char)ip[j + 1];
2251 i = fmt_xlong(s, temp);
2268 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2269 struct pktgen_dev *pkt_dev)
2271 struct sk_buff *skb = NULL;
2273 struct udphdr *udph;
2275 struct ipv6hdr *iph;
2276 struct pktgen_hdr *pgh = NULL;
2278 /* Update any of the values, used when we're incrementing various
2281 mod_cur_headers(pkt_dev);
2283 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
2285 sprintf(pkt_dev->result, "No memory");
2289 skb_reserve(skb, 16);
2291 /* Reserve for ethernet and IP header */
2292 eth = (__u8 *) skb_push(skb, 14);
2293 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2294 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2296 memcpy(eth, pkt_dev->hh, 12);
2297 *(u16 *) & eth[12] = __constant_htons(ETH_P_IPV6);
2299 datalen = pkt_dev->cur_pkt_size - 14 - sizeof(struct ipv6hdr) - sizeof(struct udphdr); /* Eth + IPh + UDPh */
2301 if (datalen < sizeof(struct pktgen_hdr)) {
2302 datalen = sizeof(struct pktgen_hdr);
2303 if (net_ratelimit())
2304 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2308 udph->source = htons(pkt_dev->cur_udp_src);
2309 udph->dest = htons(pkt_dev->cur_udp_dst);
2310 udph->len = htons(datalen + sizeof(struct udphdr));
2311 udph->check = 0; /* No checksum */
2313 *(u32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
2315 iph->hop_limit = 32;
2317 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2318 iph->nexthdr = IPPROTO_UDP;
2320 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2321 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2323 skb->mac.raw = ((u8 *) iph) - 14;
2324 skb->protocol = __constant_htons(ETH_P_IPV6);
2326 skb->pkt_type = PACKET_HOST;
2328 if (pkt_dev->nfrags <= 0)
2329 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2331 int frags = pkt_dev->nfrags;
2334 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2336 if (frags > MAX_SKB_FRAGS)
2337 frags = MAX_SKB_FRAGS;
2338 if (datalen > frags * PAGE_SIZE) {
2339 skb_put(skb, datalen - frags * PAGE_SIZE);
2340 datalen = frags * PAGE_SIZE;
2344 while (datalen > 0) {
2345 struct page *page = alloc_pages(GFP_KERNEL, 0);
2346 skb_shinfo(skb)->frags[i].page = page;
2347 skb_shinfo(skb)->frags[i].page_offset = 0;
2348 skb_shinfo(skb)->frags[i].size =
2349 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2350 datalen -= skb_shinfo(skb)->frags[i].size;
2351 skb->len += skb_shinfo(skb)->frags[i].size;
2352 skb->data_len += skb_shinfo(skb)->frags[i].size;
2354 skb_shinfo(skb)->nr_frags = i;
2363 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2367 skb_shinfo(skb)->frags[i - 1].size -= rem;
2369 skb_shinfo(skb)->frags[i] =
2370 skb_shinfo(skb)->frags[i - 1];
2371 get_page(skb_shinfo(skb)->frags[i].page);
2372 skb_shinfo(skb)->frags[i].page =
2373 skb_shinfo(skb)->frags[i - 1].page;
2374 skb_shinfo(skb)->frags[i].page_offset +=
2375 skb_shinfo(skb)->frags[i - 1].size;
2376 skb_shinfo(skb)->frags[i].size = rem;
2378 skb_shinfo(skb)->nr_frags = i;
2382 /* Stamp the time, and sequence number, convert them to network byte order */
2383 /* should we update cloned packets too ? */
2385 struct timeval timestamp;
2387 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2388 pgh->seq_num = htonl(pkt_dev->seq_num);
2390 do_gettimeofday(×tamp);
2391 pgh->tv_sec = htonl(timestamp.tv_sec);
2392 pgh->tv_usec = htonl(timestamp.tv_usec);
2399 static inline struct sk_buff *fill_packet(struct net_device *odev,
2400 struct pktgen_dev *pkt_dev)
2402 if (pkt_dev->flags & F_IPV6)
2403 return fill_packet_ipv6(odev, pkt_dev);
2405 return fill_packet_ipv4(odev, pkt_dev);
2408 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2410 pkt_dev->seq_num = 1;
2411 pkt_dev->idle_acc = 0;
2413 pkt_dev->tx_bytes = 0;
2414 pkt_dev->errors = 0;
2417 /* Set up structure for sending pkts, clear counters */
2419 static void pktgen_run(struct pktgen_thread *t)
2421 struct pktgen_dev *pkt_dev;
2424 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2427 list_for_each_entry(pkt_dev, &t->if_list, list) {
2430 * setup odev and create initial packet.
2432 pktgen_setup_inject(pkt_dev);
2434 if (pkt_dev->odev) {
2435 pktgen_clear_counters(pkt_dev);
2436 pkt_dev->running = 1; /* Cranke yeself! */
2437 pkt_dev->skb = NULL;
2438 pkt_dev->started_at = getCurUs();
2439 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2440 pkt_dev->next_tx_ns = 0;
2442 strcpy(pkt_dev->result, "Starting");
2445 strcpy(pkt_dev->result, "Error starting");
2449 t->control &= ~(T_STOP);
2452 static void pktgen_stop_all_threads_ifs(void)
2454 struct pktgen_thread *t;
2456 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads_ifs.\n"));
2458 mutex_lock(&pktgen_thread_lock);
2460 list_for_each_entry(t, &pktgen_threads, th_list)
2461 t->control |= T_STOP;
2463 mutex_unlock(&pktgen_thread_lock);
2466 static int thread_is_running(struct pktgen_thread *t)
2468 struct pktgen_dev *pkt_dev;
2471 list_for_each_entry(pkt_dev, &t->if_list, list)
2472 if (pkt_dev->running) {
2479 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2483 while (thread_is_running(t)) {
2487 msleep_interruptible(100);
2489 if (signal_pending(current))
2499 static int pktgen_wait_all_threads_run(void)
2501 struct pktgen_thread *t;
2504 mutex_lock(&pktgen_thread_lock);
2506 list_for_each_entry(t, &pktgen_threads, th_list) {
2507 sig = pktgen_wait_thread_run(t);
2513 list_for_each_entry(t, &pktgen_threads, th_list)
2514 t->control |= (T_STOP);
2516 mutex_unlock(&pktgen_thread_lock);
2520 static void pktgen_run_all_threads(void)
2522 struct pktgen_thread *t;
2524 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2526 mutex_lock(&pktgen_thread_lock);
2528 list_for_each_entry(t, &pktgen_threads, th_list)
2529 t->control |= (T_RUN);
2531 mutex_unlock(&pktgen_thread_lock);
2533 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2535 pktgen_wait_all_threads_run();
2538 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2540 __u64 total_us, bps, mbps, pps, idle;
2541 char *p = pkt_dev->result;
2543 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2545 idle = pkt_dev->idle_acc;
2547 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2548 (unsigned long long)total_us,
2549 (unsigned long long)(total_us - idle),
2550 (unsigned long long)idle,
2551 (unsigned long long)pkt_dev->sofar,
2552 pkt_dev->cur_pkt_size, nr_frags);
2554 pps = pkt_dev->sofar * USEC_PER_SEC;
2556 while ((total_us >> 32) != 0) {
2561 do_div(pps, total_us);
2563 bps = pps * 8 * pkt_dev->cur_pkt_size;
2566 do_div(mbps, 1000000);
2567 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2568 (unsigned long long)pps,
2569 (unsigned long long)mbps,
2570 (unsigned long long)bps,
2571 (unsigned long long)pkt_dev->errors);
2574 /* Set stopped-at timer, remove from running list, do counters & statistics */
2576 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2578 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
2580 if (!pkt_dev->running) {
2581 printk("pktgen: interface: %s is already stopped\n",
2586 pkt_dev->stopped_at = getCurUs();
2587 pkt_dev->running = 0;
2589 show_results(pkt_dev, nr_frags);
2594 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
2596 struct pktgen_dev *pkt_dev, *best = NULL;
2600 list_for_each_entry(pkt_dev, &t->if_list, list) {
2601 if (!pkt_dev->running)
2605 else if (pkt_dev->next_tx_us < best->next_tx_us)
2612 static void pktgen_stop(struct pktgen_thread *t)
2614 struct pktgen_dev *pkt_dev;
2616 PG_DEBUG(printk("pktgen: entering pktgen_stop\n"));
2620 list_for_each_entry(pkt_dev, &t->if_list, list) {
2621 pktgen_stop_device(pkt_dev);
2623 kfree_skb(pkt_dev->skb);
2625 pkt_dev->skb = NULL;
2632 * one of our devices needs to be removed - find it
2635 static void pktgen_rem_one_if(struct pktgen_thread *t)
2637 struct list_head *q, *n;
2638 struct pktgen_dev *cur;
2640 PG_DEBUG(printk("pktgen: entering pktgen_rem_one_if\n"));
2644 list_for_each_safe(q, n, &t->if_list) {
2645 cur = list_entry(q, struct pktgen_dev, list);
2647 if (!cur->removal_mark)
2651 kfree_skb(cur->skb);
2654 pktgen_remove_device(t, cur);
2662 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
2664 struct list_head *q, *n;
2665 struct pktgen_dev *cur;
2667 /* Remove all devices, free mem */
2669 PG_DEBUG(printk("pktgen: entering pktgen_rem_all_ifs\n"));
2672 list_for_each_safe(q, n, &t->if_list) {
2673 cur = list_entry(q, struct pktgen_dev, list);
2676 kfree_skb(cur->skb);
2679 pktgen_remove_device(t, cur);
2685 static void pktgen_rem_thread(struct pktgen_thread *t)
2687 /* Remove from the thread list */
2689 remove_proc_entry(t->name, pg_proc_dir);
2691 mutex_lock(&pktgen_thread_lock);
2693 list_del(&t->th_list);
2695 mutex_unlock(&pktgen_thread_lock);
2698 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
2700 struct net_device *odev = NULL;
2701 __u64 idle_start = 0;
2704 odev = pkt_dev->odev;
2706 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
2710 if (now < pkt_dev->next_tx_us)
2711 spin(pkt_dev, pkt_dev->next_tx_us);
2713 /* This is max DELAY, this has special meaning of
2716 if (pkt_dev->delay_us == 0x7FFFFFFF) {
2717 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
2718 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
2723 if (netif_queue_stopped(odev) || need_resched()) {
2724 idle_start = getCurUs();
2726 if (!netif_running(odev)) {
2727 pktgen_stop_device(pkt_dev);
2729 kfree_skb(pkt_dev->skb);
2730 pkt_dev->skb = NULL;
2736 pkt_dev->idle_acc += getCurUs() - idle_start;
2738 if (netif_queue_stopped(odev)) {
2739 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2740 pkt_dev->next_tx_ns = 0;
2741 goto out; /* Try the next interface */
2745 if (pkt_dev->last_ok || !pkt_dev->skb) {
2746 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
2747 || (!pkt_dev->skb)) {
2748 /* build a new pkt */
2750 kfree_skb(pkt_dev->skb);
2752 pkt_dev->skb = fill_packet(odev, pkt_dev);
2753 if (pkt_dev->skb == NULL) {
2754 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
2756 pkt_dev->clone_count--; /* back out increment, OOM */
2759 pkt_dev->allocated_skbs++;
2760 pkt_dev->clone_count = 0; /* reset counter */
2764 spin_lock_bh(&odev->xmit_lock);
2765 if (!netif_queue_stopped(odev)) {
2767 atomic_inc(&(pkt_dev->skb->users));
2769 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
2770 if (likely(ret == NETDEV_TX_OK)) {
2771 pkt_dev->last_ok = 1;
2774 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
2776 } else if (ret == NETDEV_TX_LOCKED
2777 && (odev->features & NETIF_F_LLTX)) {
2780 } else { /* Retry it next time */
2782 atomic_dec(&(pkt_dev->skb->users));
2784 if (debug && net_ratelimit())
2785 printk(KERN_INFO "pktgen: Hard xmit error\n");
2788 pkt_dev->last_ok = 0;
2791 pkt_dev->next_tx_us = getCurUs();
2792 pkt_dev->next_tx_ns = 0;
2794 pkt_dev->next_tx_us += pkt_dev->delay_us;
2795 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
2797 if (pkt_dev->next_tx_ns > 1000) {
2798 pkt_dev->next_tx_us++;
2799 pkt_dev->next_tx_ns -= 1000;
2803 else { /* Retry it next time */
2804 pkt_dev->last_ok = 0;
2805 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2806 pkt_dev->next_tx_ns = 0;
2809 spin_unlock_bh(&odev->xmit_lock);
2811 /* If pkt_dev->count is zero, then run forever */
2812 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
2813 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
2814 idle_start = getCurUs();
2815 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
2816 if (signal_pending(current)) {
2821 pkt_dev->idle_acc += getCurUs() - idle_start;
2824 /* Done with this */
2825 pktgen_stop_device(pkt_dev);
2827 kfree_skb(pkt_dev->skb);
2828 pkt_dev->skb = NULL;
2834 * Main loop of the thread goes here
2837 static void pktgen_thread_worker(struct pktgen_thread *t)
2840 struct pktgen_dev *pkt_dev = NULL;
2843 u32 max_before_softirq;
2844 u32 tx_since_softirq = 0;
2846 daemonize("pktgen/%d", cpu);
2848 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
2850 spin_lock_irq(¤t->sighand->siglock);
2851 tmpsig = current->blocked;
2852 siginitsetinv(¤t->blocked,
2853 sigmask(SIGKILL) | sigmask(SIGSTOP) | sigmask(SIGTERM));
2855 recalc_sigpending();
2856 spin_unlock_irq(¤t->sighand->siglock);
2858 /* Migrate to the right CPU */
2859 set_cpus_allowed(current, cpumask_of_cpu(cpu));
2860 if (smp_processor_id() != cpu)
2863 init_waitqueue_head(&t->queue);
2865 t->control &= ~(T_TERMINATE);
2866 t->control &= ~(T_RUN);
2867 t->control &= ~(T_STOP);
2868 t->control &= ~(T_REMDEVALL);
2869 t->control &= ~(T_REMDEV);
2871 t->pid = current->pid;
2873 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
2875 max_before_softirq = t->max_before_softirq;
2877 __set_current_state(TASK_INTERRUPTIBLE);
2882 __set_current_state(TASK_RUNNING);
2885 * Get next dev to xmit -- if any.
2888 pkt_dev = next_to_run(t);
2892 pktgen_xmit(pkt_dev);
2895 * We like to stay RUNNING but must also give
2896 * others fair share.
2899 tx_since_softirq += pkt_dev->last_ok;
2901 if (tx_since_softirq > max_before_softirq) {
2902 if (local_softirq_pending())
2904 tx_since_softirq = 0;
2907 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
2908 schedule_timeout(HZ / 10);
2909 finish_wait(&(t->queue), &wait);
2913 * Back from sleep, either due to the timeout or signal.
2914 * We check if we have any "posted" work for us.
2917 if (t->control & T_TERMINATE || signal_pending(current))
2918 /* we received a request to terminate ourself */
2921 if (t->control & T_STOP) {
2923 t->control &= ~(T_STOP);
2926 if (t->control & T_RUN) {
2928 t->control &= ~(T_RUN);
2931 if (t->control & T_REMDEVALL) {
2932 pktgen_rem_all_ifs(t);
2933 t->control &= ~(T_REMDEVALL);
2936 if (t->control & T_REMDEV) {
2937 pktgen_rem_one_if(t);
2938 t->control &= ~(T_REMDEV);
2945 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
2948 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
2949 pktgen_rem_all_ifs(t);
2951 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
2952 pktgen_rem_thread(t);
2957 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
2960 struct pktgen_dev *p, *pkt_dev = NULL;
2963 list_for_each_entry(p, &t->if_list, list)
2964 if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
2970 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev));
2975 * Adds a dev at front of if_list.
2978 static int add_dev_to_thread(struct pktgen_thread *t,
2979 struct pktgen_dev *pkt_dev)
2985 if (pkt_dev->pg_thread) {
2986 printk("pktgen: ERROR: already assigned to a thread.\n");
2991 list_add(&pkt_dev->list, &t->if_list);
2992 pkt_dev->pg_thread = t;
2993 pkt_dev->running = 0;
3000 /* Called under thread lock */
3002 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3004 struct pktgen_dev *pkt_dev;
3005 struct proc_dir_entry *pe;
3007 /* We don't allow a device to be on several threads */
3009 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3011 printk("pktgen: ERROR: interface already used.\n");
3015 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3019 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3020 if (pkt_dev->flows == NULL) {
3024 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3026 pkt_dev->removal_mark = 0;
3027 pkt_dev->min_pkt_size = ETH_ZLEN;
3028 pkt_dev->max_pkt_size = ETH_ZLEN;
3029 pkt_dev->nfrags = 0;
3030 pkt_dev->clone_skb = pg_clone_skb_d;
3031 pkt_dev->delay_us = pg_delay_d / 1000;
3032 pkt_dev->delay_ns = pg_delay_d % 1000;
3033 pkt_dev->count = pg_count_d;
3035 pkt_dev->udp_src_min = 9; /* sink port */
3036 pkt_dev->udp_src_max = 9;
3037 pkt_dev->udp_dst_min = 9;
3038 pkt_dev->udp_dst_max = 9;
3040 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
3042 if (!pktgen_setup_dev(pkt_dev)) {
3043 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
3045 vfree(pkt_dev->flows);
3050 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
3052 printk("pktgen: cannot create %s/%s procfs entry.\n",
3053 PG_PROC_DIR, ifname);
3055 vfree(pkt_dev->flows);
3059 pe->proc_fops = &pktgen_if_fops;
3062 return add_dev_to_thread(t, pkt_dev);
3065 static struct pktgen_thread *__init pktgen_find_thread(const char *name)
3067 struct pktgen_thread *t;
3069 mutex_lock(&pktgen_thread_lock);
3071 list_for_each_entry(t, &pktgen_threads, th_list)
3072 if (strcmp(t->name, name) == 0) {
3073 mutex_unlock(&pktgen_thread_lock);
3077 mutex_unlock(&pktgen_thread_lock);
3081 static int __init pktgen_create_thread(const char *name, int cpu)
3084 struct pktgen_thread *t = NULL;
3085 struct proc_dir_entry *pe;
3087 if (strlen(name) > 31) {
3088 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
3092 if (pktgen_find_thread(name)) {
3093 printk("pktgen: ERROR: thread: %s already exists\n", name);
3097 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3099 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3103 strcpy(t->name, name);
3104 spin_lock_init(&t->if_lock);
3107 pe = create_proc_entry(t->name, 0600, pg_proc_dir);
3109 printk("pktgen: cannot create %s/%s procfs entry.\n",
3110 PG_PROC_DIR, t->name);
3115 pe->proc_fops = &pktgen_thread_fops;
3118 INIT_LIST_HEAD(&t->if_list);
3120 list_add_tail(&t->th_list, &pktgen_threads);
3124 err = kernel_thread((void *)pktgen_thread_worker, (void *)t,
3125 CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
3127 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3128 remove_proc_entry(t->name, pg_proc_dir);
3129 list_del(&t->th_list);
3138 * Removes a device from the thread if_list.
3140 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3141 struct pktgen_dev *pkt_dev)
3143 struct list_head *q, *n;
3144 struct pktgen_dev *p;
3146 list_for_each_safe(q, n, &t->if_list) {
3147 p = list_entry(q, struct pktgen_dev, list);
3153 static int pktgen_remove_device(struct pktgen_thread *t,
3154 struct pktgen_dev *pkt_dev)
3157 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
3159 if (pkt_dev->running) {
3160 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3161 pktgen_stop_device(pkt_dev);
3164 /* Dis-associate from the interface */
3166 if (pkt_dev->odev) {
3167 dev_put(pkt_dev->odev);
3168 pkt_dev->odev = NULL;
3171 /* And update the thread if_list */
3173 _rem_dev_from_if_list(t, pkt_dev);
3175 /* Clean up proc file system */
3177 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
3180 vfree(pkt_dev->flows);
3185 static int __init pg_init(void)
3188 struct proc_dir_entry *pe;
3192 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3195 pg_proc_dir->owner = THIS_MODULE;
3197 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3199 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3201 proc_net_remove(PG_PROC_DIR);
3205 pe->proc_fops = &pktgen_fops;
3208 /* Register us to receive netdevice events */
3209 register_netdevice_notifier(&pktgen_notifier_block);
3211 for_each_online_cpu(cpu) {
3215 sprintf(buf, "kpktgend_%i", cpu);
3216 err = pktgen_create_thread(buf, cpu);
3218 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3222 if (list_empty(&pktgen_threads)) {
3223 printk("pktgen: ERROR: Initialization failed for all threads\n");
3224 unregister_netdevice_notifier(&pktgen_notifier_block);
3225 remove_proc_entry(PGCTRL, pg_proc_dir);
3226 proc_net_remove(PG_PROC_DIR);
3233 static void __exit pg_cleanup(void)
3235 struct pktgen_thread *t;
3236 struct list_head *q, *n;
3237 wait_queue_head_t queue;
3238 init_waitqueue_head(&queue);
3240 /* Stop all interfaces & threads */
3242 list_for_each_safe(q, n, &pktgen_threads) {
3243 t = list_entry(q, struct pktgen_thread, th_list);
3244 t->control |= (T_TERMINATE);
3246 wait_event_interruptible_timeout(queue, (t->removed == 1), HZ);
3249 /* Un-register us from receiving netdevice events */
3250 unregister_netdevice_notifier(&pktgen_notifier_block);
3252 /* Clean up proc file system */
3253 remove_proc_entry(PGCTRL, pg_proc_dir);
3254 proc_net_remove(PG_PROC_DIR);
3257 module_init(pg_init);
3258 module_exit(pg_cleanup);
3260 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3261 MODULE_DESCRIPTION("Packet Generator tool");
3262 MODULE_LICENSE("GPL");
3263 module_param(pg_count_d, int, 0);
3264 module_param(pg_delay_d, int, 0);
3265 module_param(pg_clone_skb_d, int, 0);
3266 module_param(debug, int, 0);