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 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
115 #include <linux/sys.h>
116 #include <linux/types.h>
117 #include <linux/module.h>
118 #include <linux/moduleparam.h>
119 #include <linux/kernel.h>
120 #include <linux/smp_lock.h>
121 #include <linux/mutex.h>
122 #include <linux/sched.h>
123 #include <linux/slab.h>
124 #include <linux/vmalloc.h>
125 #include <linux/unistd.h>
126 #include <linux/string.h>
127 #include <linux/ptrace.h>
128 #include <linux/errno.h>
129 #include <linux/ioport.h>
130 #include <linux/interrupt.h>
131 #include <linux/capability.h>
132 #include <linux/freezer.h>
133 #include <linux/delay.h>
134 #include <linux/timer.h>
135 #include <linux/list.h>
136 #include <linux/init.h>
137 #include <linux/skbuff.h>
138 #include <linux/netdevice.h>
139 #include <linux/inet.h>
140 #include <linux/inetdevice.h>
141 #include <linux/rtnetlink.h>
142 #include <linux/if_arp.h>
143 #include <linux/if_vlan.h>
144 #include <linux/in.h>
145 #include <linux/ip.h>
146 #include <linux/ipv6.h>
147 #include <linux/udp.h>
148 #include <linux/proc_fs.h>
149 #include <linux/seq_file.h>
150 #include <linux/wait.h>
151 #include <linux/etherdevice.h>
152 #include <linux/kthread.h>
153 #include <net/checksum.h>
154 #include <net/ipv6.h>
155 #include <net/addrconf.h>
156 #include <asm/byteorder.h>
157 #include <linux/rcupdate.h>
158 #include <asm/bitops.h>
161 #include <asm/uaccess.h>
162 #include <asm/div64.h> /* do_div */
163 #include <asm/timex.h>
165 #define VERSION "pktgen v2.68: Packet Generator for packet performance testing.\n"
167 /* #define PG_DEBUG(a) a */
170 /* The buckets are exponential in 'width' */
171 #define LAT_BUCKETS_MAX 32
172 #define IP_NAME_SZ 32
173 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
174 #define MPLS_STACK_BOTTOM __constant_htonl(0x00000100)
176 /* Device flag bits */
177 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
178 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
179 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
180 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
181 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
182 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
183 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
184 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
185 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
186 #define F_VID_RND (1<<9) /* Random VLAN ID */
187 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
189 /* Thread control flag bits */
190 #define T_TERMINATE (1<<0)
191 #define T_STOP (1<<1) /* Stop run */
192 #define T_RUN (1<<2) /* Start run */
193 #define T_REMDEVALL (1<<3) /* Remove all devs */
194 #define T_REMDEV (1<<4) /* Remove one dev */
196 /* If lock -- can be removed after some work */
197 #define if_lock(t) spin_lock(&(t->if_lock));
198 #define if_unlock(t) spin_unlock(&(t->if_lock));
200 /* Used to help with determining the pkts on receive */
201 #define PKTGEN_MAGIC 0xbe9be955
202 #define PG_PROC_DIR "pktgen"
203 #define PGCTRL "pgctrl"
204 static struct proc_dir_entry *pg_proc_dir = NULL;
206 #define MAX_CFLOWS 65536
208 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
209 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
219 * Try to keep frequent/infrequent used vars. separated.
222 char ifname[IFNAMSIZ];
225 struct pktgen_thread *pg_thread; /* the owner */
226 struct list_head list; /* Used for chaining in the thread's run-queue */
228 int running; /* if this changes to false, the test will stop */
230 /* If min != max, then we will either do a linear iteration, or
231 * we will do a random selection from within the range.
234 int removal_mark; /* non-zero => the device is marked for
235 * removal by worker thread */
237 int min_pkt_size; /* = ETH_ZLEN; */
238 int max_pkt_size; /* = ETH_ZLEN; */
240 __u32 delay_us; /* Default delay */
242 __u64 count; /* Default No packets to send */
243 __u64 sofar; /* How many pkts we've sent so far */
244 __u64 tx_bytes; /* How many bytes we've transmitted */
245 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
247 /* runtime counters relating to clone_skb */
248 __u64 next_tx_us; /* timestamp of when to tx next */
251 __u64 allocated_skbs;
253 int last_ok; /* Was last skb sent?
254 * Or a failed transmit of some sort? This will keep
255 * sequence numbers in order, for example.
257 __u64 started_at; /* micro-seconds */
258 __u64 stopped_at; /* micro-seconds */
259 __u64 idle_acc; /* micro-seconds */
262 int clone_skb; /* Use multiple SKBs during packet gen. If this number
263 * is greater than 1, then that many copies of the same
264 * packet will be sent before a new packet is allocated.
265 * For instance, if you want to send 1024 identical packets
266 * before creating a new packet, set clone_skb to 1024.
269 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
270 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
271 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
272 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
274 struct in6_addr in6_saddr;
275 struct in6_addr in6_daddr;
276 struct in6_addr cur_in6_daddr;
277 struct in6_addr cur_in6_saddr;
279 struct in6_addr min_in6_daddr;
280 struct in6_addr max_in6_daddr;
281 struct in6_addr min_in6_saddr;
282 struct in6_addr max_in6_saddr;
284 /* If we're doing ranges, random or incremental, then this
285 * defines the min/max for those ranges.
287 __be32 saddr_min; /* inclusive, source IP address */
288 __be32 saddr_max; /* exclusive, source IP address */
289 __be32 daddr_min; /* inclusive, dest IP address */
290 __be32 daddr_max; /* exclusive, dest IP address */
292 __u16 udp_src_min; /* inclusive, source UDP port */
293 __u16 udp_src_max; /* exclusive, source UDP port */
294 __u16 udp_dst_min; /* inclusive, dest UDP port */
295 __u16 udp_dst_max; /* exclusive, dest UDP port */
298 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
299 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
302 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
303 __be32 labels[MAX_MPLS_LABELS];
305 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
308 __u16 vlan_id; /* 0xffff means no vlan tag */
312 __u16 svlan_id; /* 0xffff means no svlan tag */
314 __u32 src_mac_count; /* How many MACs to iterate through */
315 __u32 dst_mac_count; /* How many MACs to iterate through */
317 unsigned char dst_mac[ETH_ALEN];
318 unsigned char src_mac[ETH_ALEN];
320 __u32 cur_dst_mac_offset;
321 __u32 cur_src_mac_offset;
330 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
332 We fill in SRC address later
333 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
337 __u16 pad; /* pad out the hh struct to an even 16 bytes */
339 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
340 * are transmitting the same one multiple times
342 struct net_device *odev; /* The out-going device. Note that the device should
343 * have it's pg_info pointer pointing back to this
344 * device. This will be set when the user specifies
345 * the out-going device name (not when the inject is
346 * started as it used to do.)
348 struct flow_state *flows;
349 unsigned cflows; /* Concurrent flows (config) */
350 unsigned lflow; /* Flow length (config) */
351 unsigned nflows; /* accumulated flows (stats) */
361 struct pktgen_thread {
363 struct list_head if_list; /* All device here */
364 struct list_head th_list;
365 struct task_struct *tsk;
367 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
369 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
375 wait_queue_head_t queue;
381 /* This code works around the fact that do_div cannot handle two 64-bit
382 numbers, and regular 64-bit division doesn't work on x86 kernels.
388 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
389 * Function copied/adapted/optimized from:
391 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
393 * Copyright 1994, University of Cambridge Computer Laboratory
394 * All Rights Reserved.
397 static inline s64 divremdi3(s64 x, s64 y, int type)
399 u64 a = (x < 0) ? -x : x;
400 u64 b = (y < 0) ? -y : y;
420 if (PG_DIV == type) {
421 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
423 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
427 /* End of hacks to deal with 64-bit math on x86 */
429 /** Convert to milliseconds */
430 static inline __u64 tv_to_ms(const struct timeval *tv)
432 __u64 ms = tv->tv_usec / 1000;
433 ms += (__u64) tv->tv_sec * (__u64) 1000;
437 /** Convert to micro-seconds */
438 static inline __u64 tv_to_us(const struct timeval *tv)
440 __u64 us = tv->tv_usec;
441 us += (__u64) tv->tv_sec * (__u64) 1000000;
445 static inline __u64 pg_div(__u64 n, __u32 base)
449 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
454 static inline __u64 pg_div64(__u64 n, __u64 base)
458 * How do we know if the architecture we are running on
459 * supports division with 64 bit base?
462 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
466 tmp = divremdi3(n, base, PG_DIV);
471 static inline u32 pktgen_random(void)
475 get_random_bytes(&n, 4);
482 static inline __u64 getCurMs(void)
485 do_gettimeofday(&tv);
486 return tv_to_ms(&tv);
489 static inline __u64 getCurUs(void)
492 do_gettimeofday(&tv);
493 return tv_to_us(&tv);
496 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
498 return tv_to_us(a) - tv_to_us(b);
501 /* old include end */
503 static char version[] __initdata = VERSION;
505 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
506 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
507 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
509 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
510 static void pktgen_run_all_threads(void);
511 static void pktgen_stop_all_threads_ifs(void);
512 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
513 static void pktgen_stop(struct pktgen_thread *t);
514 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
515 static int pktgen_mark_device(const char *ifname);
516 static unsigned int scan_ip6(const char *s, char ip[16]);
517 static unsigned int fmt_ip6(char *s, const char ip[16]);
519 /* Module parameters, defaults. */
520 static int pg_count_d = 1000; /* 1000 pkts by default */
521 static int pg_delay_d;
522 static int pg_clone_skb_d;
525 static DEFINE_MUTEX(pktgen_thread_lock);
526 static LIST_HEAD(pktgen_threads);
528 static struct notifier_block pktgen_notifier_block = {
529 .notifier_call = pktgen_device_event,
533 * /proc handling functions
537 static int pgctrl_show(struct seq_file *seq, void *v)
539 seq_puts(seq, VERSION);
543 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
544 size_t count, loff_t * ppos)
549 if (!capable(CAP_NET_ADMIN)) {
554 if (count > sizeof(data))
555 count = sizeof(data);
557 if (copy_from_user(data, buf, count)) {
561 data[count - 1] = 0; /* Make string */
563 if (!strcmp(data, "stop"))
564 pktgen_stop_all_threads_ifs();
566 else if (!strcmp(data, "start"))
567 pktgen_run_all_threads();
570 printk("pktgen: Unknown command: %s\n", data);
578 static int pgctrl_open(struct inode *inode, struct file *file)
580 return single_open(file, pgctrl_show, PDE(inode)->data);
583 static const struct file_operations pktgen_fops = {
584 .owner = THIS_MODULE,
588 .write = pgctrl_write,
589 .release = single_release,
592 static int pktgen_if_show(struct seq_file *seq, void *v)
595 struct pktgen_dev *pkt_dev = seq->private;
598 __u64 now = getCurUs();
601 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
602 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
603 pkt_dev->max_pkt_size);
606 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
608 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
609 pkt_dev->clone_skb, pkt_dev->ifname);
611 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
614 if (pkt_dev->flags & F_IPV6) {
615 char b1[128], b2[128], b3[128];
616 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
617 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
618 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
620 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
623 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
624 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
625 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
627 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
632 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
633 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
636 seq_puts(seq, " src_mac: ");
638 if (is_zero_ether_addr(pkt_dev->src_mac))
639 for (i = 0; i < 6; i++)
640 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
643 for (i = 0; i < 6; i++)
644 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
647 seq_printf(seq, "dst_mac: ");
648 for (i = 0; i < 6; i++)
649 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
650 i == 5 ? "\n" : ":");
653 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
654 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
655 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
658 " src_mac_count: %d dst_mac_count: %d\n",
659 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
661 if (pkt_dev->nr_labels) {
663 seq_printf(seq, " mpls: ");
664 for(i = 0; i < pkt_dev->nr_labels; i++)
665 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
666 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
669 if (pkt_dev->vlan_id != 0xffff) {
670 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
671 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
674 if (pkt_dev->svlan_id != 0xffff) {
675 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
676 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
680 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
683 if (pkt_dev->traffic_class) {
684 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
687 seq_printf(seq, " Flags: ");
689 if (pkt_dev->flags & F_IPV6)
690 seq_printf(seq, "IPV6 ");
692 if (pkt_dev->flags & F_IPSRC_RND)
693 seq_printf(seq, "IPSRC_RND ");
695 if (pkt_dev->flags & F_IPDST_RND)
696 seq_printf(seq, "IPDST_RND ");
698 if (pkt_dev->flags & F_TXSIZE_RND)
699 seq_printf(seq, "TXSIZE_RND ");
701 if (pkt_dev->flags & F_UDPSRC_RND)
702 seq_printf(seq, "UDPSRC_RND ");
704 if (pkt_dev->flags & F_UDPDST_RND)
705 seq_printf(seq, "UDPDST_RND ");
707 if (pkt_dev->flags & F_MPLS_RND)
708 seq_printf(seq, "MPLS_RND ");
710 if (pkt_dev->flags & F_MACSRC_RND)
711 seq_printf(seq, "MACSRC_RND ");
713 if (pkt_dev->flags & F_MACDST_RND)
714 seq_printf(seq, "MACDST_RND ");
716 if (pkt_dev->flags & F_VID_RND)
717 seq_printf(seq, "VID_RND ");
719 if (pkt_dev->flags & F_SVID_RND)
720 seq_printf(seq, "SVID_RND ");
724 sa = pkt_dev->started_at;
725 stopped = pkt_dev->stopped_at;
726 if (pkt_dev->running)
727 stopped = now; /* not really stopped, more like last-running-at */
730 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
731 (unsigned long long)pkt_dev->sofar,
732 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
733 (unsigned long long)stopped,
734 (unsigned long long)pkt_dev->idle_acc);
737 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
738 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
739 pkt_dev->cur_src_mac_offset);
741 if (pkt_dev->flags & F_IPV6) {
742 char b1[128], b2[128];
743 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
744 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
745 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
747 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
748 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
750 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
751 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
753 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
755 if (pkt_dev->result[0])
756 seq_printf(seq, "Result: %s\n", pkt_dev->result);
758 seq_printf(seq, "Result: Idle\n");
764 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
769 for(; i < maxlen; i++) {
772 if (get_user(c, &user_buffer[i]))
774 if ((c >= '0') && (c <= '9'))
776 else if ((c >= 'a') && (c <= 'f'))
777 *num |= c - 'a' + 10;
778 else if ((c >= 'A') && (c <= 'F'))
779 *num |= c - 'A' + 10;
786 static int count_trail_chars(const char __user * user_buffer,
791 for (i = 0; i < maxlen; i++) {
793 if (get_user(c, &user_buffer[i]))
811 static unsigned long num_arg(const char __user * user_buffer,
812 unsigned long maxlen, unsigned long *num)
817 for (; i < maxlen; i++) {
819 if (get_user(c, &user_buffer[i]))
821 if ((c >= '0') && (c <= '9')) {
830 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
834 for (; i < maxlen; i++) {
836 if (get_user(c, &user_buffer[i]))
854 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
861 pkt_dev->nr_labels = 0;
864 len = hex32_arg(&buffer[i], 8, &tmp);
867 pkt_dev->labels[n] = htonl(tmp);
868 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
869 pkt_dev->flags |= F_MPLS_RND;
871 if (get_user(c, &buffer[i]))
875 if (n >= MAX_MPLS_LABELS)
879 pkt_dev->nr_labels = n;
883 static ssize_t pktgen_if_write(struct file *file,
884 const char __user * user_buffer, size_t count,
887 struct seq_file *seq = (struct seq_file *)file->private_data;
888 struct pktgen_dev *pkt_dev = seq->private;
890 char name[16], valstr[32];
891 unsigned long value = 0;
892 char *pg_result = NULL;
896 pg_result = &(pkt_dev->result[0]);
899 printk("pktgen: wrong command format\n");
904 tmp = count_trail_chars(&user_buffer[i], max);
906 printk("pktgen: illegal format\n");
911 /* Read variable name */
913 len = strn_len(&user_buffer[i], sizeof(name) - 1);
917 memset(name, 0, sizeof(name));
918 if (copy_from_user(name, &user_buffer[i], len))
923 len = count_trail_chars(&user_buffer[i], max);
931 if (copy_from_user(tb, user_buffer, count))
934 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
935 (unsigned long)count, tb);
938 if (!strcmp(name, "min_pkt_size")) {
939 len = num_arg(&user_buffer[i], 10, &value);
944 if (value < 14 + 20 + 8)
946 if (value != pkt_dev->min_pkt_size) {
947 pkt_dev->min_pkt_size = value;
948 pkt_dev->cur_pkt_size = value;
950 sprintf(pg_result, "OK: min_pkt_size=%u",
951 pkt_dev->min_pkt_size);
955 if (!strcmp(name, "max_pkt_size")) {
956 len = num_arg(&user_buffer[i], 10, &value);
961 if (value < 14 + 20 + 8)
963 if (value != pkt_dev->max_pkt_size) {
964 pkt_dev->max_pkt_size = value;
965 pkt_dev->cur_pkt_size = value;
967 sprintf(pg_result, "OK: max_pkt_size=%u",
968 pkt_dev->max_pkt_size);
972 /* Shortcut for min = max */
974 if (!strcmp(name, "pkt_size")) {
975 len = num_arg(&user_buffer[i], 10, &value);
980 if (value < 14 + 20 + 8)
982 if (value != pkt_dev->min_pkt_size) {
983 pkt_dev->min_pkt_size = value;
984 pkt_dev->max_pkt_size = value;
985 pkt_dev->cur_pkt_size = value;
987 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
991 if (!strcmp(name, "debug")) {
992 len = num_arg(&user_buffer[i], 10, &value);
998 sprintf(pg_result, "OK: debug=%u", debug);
1002 if (!strcmp(name, "frags")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1008 pkt_dev->nfrags = value;
1009 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
1012 if (!strcmp(name, "delay")) {
1013 len = num_arg(&user_buffer[i], 10, &value);
1018 if (value == 0x7FFFFFFF) {
1019 pkt_dev->delay_us = 0x7FFFFFFF;
1020 pkt_dev->delay_ns = 0;
1022 pkt_dev->delay_us = value / 1000;
1023 pkt_dev->delay_ns = value % 1000;
1025 sprintf(pg_result, "OK: delay=%u",
1026 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1029 if (!strcmp(name, "udp_src_min")) {
1030 len = num_arg(&user_buffer[i], 10, &value);
1035 if (value != pkt_dev->udp_src_min) {
1036 pkt_dev->udp_src_min = value;
1037 pkt_dev->cur_udp_src = value;
1039 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1042 if (!strcmp(name, "udp_dst_min")) {
1043 len = num_arg(&user_buffer[i], 10, &value);
1048 if (value != pkt_dev->udp_dst_min) {
1049 pkt_dev->udp_dst_min = value;
1050 pkt_dev->cur_udp_dst = value;
1052 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1055 if (!strcmp(name, "udp_src_max")) {
1056 len = num_arg(&user_buffer[i], 10, &value);
1061 if (value != pkt_dev->udp_src_max) {
1062 pkt_dev->udp_src_max = value;
1063 pkt_dev->cur_udp_src = value;
1065 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1068 if (!strcmp(name, "udp_dst_max")) {
1069 len = num_arg(&user_buffer[i], 10, &value);
1074 if (value != pkt_dev->udp_dst_max) {
1075 pkt_dev->udp_dst_max = value;
1076 pkt_dev->cur_udp_dst = value;
1078 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1081 if (!strcmp(name, "clone_skb")) {
1082 len = num_arg(&user_buffer[i], 10, &value);
1087 pkt_dev->clone_skb = value;
1089 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1092 if (!strcmp(name, "count")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
1098 pkt_dev->count = value;
1099 sprintf(pg_result, "OK: count=%llu",
1100 (unsigned long long)pkt_dev->count);
1103 if (!strcmp(name, "src_mac_count")) {
1104 len = num_arg(&user_buffer[i], 10, &value);
1109 if (pkt_dev->src_mac_count != value) {
1110 pkt_dev->src_mac_count = value;
1111 pkt_dev->cur_src_mac_offset = 0;
1113 sprintf(pg_result, "OK: src_mac_count=%d",
1114 pkt_dev->src_mac_count);
1117 if (!strcmp(name, "dst_mac_count")) {
1118 len = num_arg(&user_buffer[i], 10, &value);
1123 if (pkt_dev->dst_mac_count != value) {
1124 pkt_dev->dst_mac_count = value;
1125 pkt_dev->cur_dst_mac_offset = 0;
1127 sprintf(pg_result, "OK: dst_mac_count=%d",
1128 pkt_dev->dst_mac_count);
1131 if (!strcmp(name, "flag")) {
1134 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1138 if (copy_from_user(f, &user_buffer[i], len))
1141 if (strcmp(f, "IPSRC_RND") == 0)
1142 pkt_dev->flags |= F_IPSRC_RND;
1144 else if (strcmp(f, "!IPSRC_RND") == 0)
1145 pkt_dev->flags &= ~F_IPSRC_RND;
1147 else if (strcmp(f, "TXSIZE_RND") == 0)
1148 pkt_dev->flags |= F_TXSIZE_RND;
1150 else if (strcmp(f, "!TXSIZE_RND") == 0)
1151 pkt_dev->flags &= ~F_TXSIZE_RND;
1153 else if (strcmp(f, "IPDST_RND") == 0)
1154 pkt_dev->flags |= F_IPDST_RND;
1156 else if (strcmp(f, "!IPDST_RND") == 0)
1157 pkt_dev->flags &= ~F_IPDST_RND;
1159 else if (strcmp(f, "UDPSRC_RND") == 0)
1160 pkt_dev->flags |= F_UDPSRC_RND;
1162 else if (strcmp(f, "!UDPSRC_RND") == 0)
1163 pkt_dev->flags &= ~F_UDPSRC_RND;
1165 else if (strcmp(f, "UDPDST_RND") == 0)
1166 pkt_dev->flags |= F_UDPDST_RND;
1168 else if (strcmp(f, "!UDPDST_RND") == 0)
1169 pkt_dev->flags &= ~F_UDPDST_RND;
1171 else if (strcmp(f, "MACSRC_RND") == 0)
1172 pkt_dev->flags |= F_MACSRC_RND;
1174 else if (strcmp(f, "!MACSRC_RND") == 0)
1175 pkt_dev->flags &= ~F_MACSRC_RND;
1177 else if (strcmp(f, "MACDST_RND") == 0)
1178 pkt_dev->flags |= F_MACDST_RND;
1180 else if (strcmp(f, "!MACDST_RND") == 0)
1181 pkt_dev->flags &= ~F_MACDST_RND;
1183 else if (strcmp(f, "MPLS_RND") == 0)
1184 pkt_dev->flags |= F_MPLS_RND;
1186 else if (strcmp(f, "!MPLS_RND") == 0)
1187 pkt_dev->flags &= ~F_MPLS_RND;
1189 else if (strcmp(f, "VID_RND") == 0)
1190 pkt_dev->flags |= F_VID_RND;
1192 else if (strcmp(f, "!VID_RND") == 0)
1193 pkt_dev->flags &= ~F_VID_RND;
1195 else if (strcmp(f, "SVID_RND") == 0)
1196 pkt_dev->flags |= F_SVID_RND;
1198 else if (strcmp(f, "!SVID_RND") == 0)
1199 pkt_dev->flags &= ~F_SVID_RND;
1201 else if (strcmp(f, "!IPV6") == 0)
1202 pkt_dev->flags &= ~F_IPV6;
1206 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1208 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1209 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
1212 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1215 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1216 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1221 if (copy_from_user(buf, &user_buffer[i], len))
1224 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1225 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1226 strncpy(pkt_dev->dst_min, buf, len);
1227 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1228 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1231 printk("pktgen: dst_min set to: %s\n",
1234 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1237 if (!strcmp(name, "dst_max")) {
1238 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1243 if (copy_from_user(buf, &user_buffer[i], len))
1247 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1248 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1249 strncpy(pkt_dev->dst_max, buf, len);
1250 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1251 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1254 printk("pktgen: dst_max set to: %s\n",
1257 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1260 if (!strcmp(name, "dst6")) {
1261 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1265 pkt_dev->flags |= F_IPV6;
1267 if (copy_from_user(buf, &user_buffer[i], len))
1271 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1272 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1274 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1277 printk("pktgen: dst6 set to: %s\n", buf);
1280 sprintf(pg_result, "OK: dst6=%s", buf);
1283 if (!strcmp(name, "dst6_min")) {
1284 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1288 pkt_dev->flags |= F_IPV6;
1290 if (copy_from_user(buf, &user_buffer[i], len))
1294 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1295 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1297 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1298 &pkt_dev->min_in6_daddr);
1300 printk("pktgen: dst6_min set to: %s\n", buf);
1303 sprintf(pg_result, "OK: dst6_min=%s", buf);
1306 if (!strcmp(name, "dst6_max")) {
1307 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1311 pkt_dev->flags |= F_IPV6;
1313 if (copy_from_user(buf, &user_buffer[i], len))
1317 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1318 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1321 printk("pktgen: dst6_max set to: %s\n", buf);
1324 sprintf(pg_result, "OK: dst6_max=%s", buf);
1327 if (!strcmp(name, "src6")) {
1328 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1332 pkt_dev->flags |= F_IPV6;
1334 if (copy_from_user(buf, &user_buffer[i], len))
1338 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1339 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1341 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1344 printk("pktgen: src6 set to: %s\n", buf);
1347 sprintf(pg_result, "OK: src6=%s", buf);
1350 if (!strcmp(name, "src_min")) {
1351 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1355 if (copy_from_user(buf, &user_buffer[i], len))
1358 if (strcmp(buf, pkt_dev->src_min) != 0) {
1359 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1360 strncpy(pkt_dev->src_min, buf, len);
1361 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1362 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1365 printk("pktgen: src_min set to: %s\n",
1368 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1371 if (!strcmp(name, "src_max")) {
1372 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1376 if (copy_from_user(buf, &user_buffer[i], len))
1379 if (strcmp(buf, pkt_dev->src_max) != 0) {
1380 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1381 strncpy(pkt_dev->src_max, buf, len);
1382 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1383 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1386 printk("pktgen: src_max set to: %s\n",
1389 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1392 if (!strcmp(name, "dst_mac")) {
1394 unsigned char old_dmac[ETH_ALEN];
1395 unsigned char *m = pkt_dev->dst_mac;
1396 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1398 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1402 memset(valstr, 0, sizeof(valstr));
1403 if (copy_from_user(valstr, &user_buffer[i], len))
1407 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1408 if (*v >= '0' && *v <= '9') {
1412 if (*v >= 'A' && *v <= 'F') {
1414 *m += *v - 'A' + 10;
1416 if (*v >= 'a' && *v <= 'f') {
1418 *m += *v - 'a' + 10;
1426 /* Set up Dest MAC */
1427 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1428 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1430 sprintf(pg_result, "OK: dstmac");
1433 if (!strcmp(name, "src_mac")) {
1435 unsigned char *m = pkt_dev->src_mac;
1437 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1441 memset(valstr, 0, sizeof(valstr));
1442 if (copy_from_user(valstr, &user_buffer[i], len))
1446 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1447 if (*v >= '0' && *v <= '9') {
1451 if (*v >= 'A' && *v <= 'F') {
1453 *m += *v - 'A' + 10;
1455 if (*v >= 'a' && *v <= 'f') {
1457 *m += *v - 'a' + 10;
1465 sprintf(pg_result, "OK: srcmac");
1469 if (!strcmp(name, "clear_counters")) {
1470 pktgen_clear_counters(pkt_dev);
1471 sprintf(pg_result, "OK: Clearing counters.\n");
1475 if (!strcmp(name, "flows")) {
1476 len = num_arg(&user_buffer[i], 10, &value);
1481 if (value > MAX_CFLOWS)
1484 pkt_dev->cflows = value;
1485 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1489 if (!strcmp(name, "flowlen")) {
1490 len = num_arg(&user_buffer[i], 10, &value);
1495 pkt_dev->lflow = value;
1496 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1500 if (!strcmp(name, "mpls")) {
1502 len = get_labels(&user_buffer[i], pkt_dev);
1503 if (len < 0) { return len; }
1505 offset = sprintf(pg_result, "OK: mpls=");
1506 for(n = 0; n < pkt_dev->nr_labels; n++)
1507 offset += sprintf(pg_result + offset,
1508 "%08x%s", ntohl(pkt_dev->labels[n]),
1509 n == pkt_dev->nr_labels-1 ? "" : ",");
1511 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1512 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1513 pkt_dev->svlan_id = 0xffff;
1516 printk("pktgen: VLAN/SVLAN auto turned off\n");
1521 if (!strcmp(name, "vlan_id")) {
1522 len = num_arg(&user_buffer[i], 4, &value);
1527 if (value <= 4095) {
1528 pkt_dev->vlan_id = value; /* turn on VLAN */
1531 printk("pktgen: VLAN turned on\n");
1533 if (debug && pkt_dev->nr_labels)
1534 printk("pktgen: MPLS auto turned off\n");
1536 pkt_dev->nr_labels = 0; /* turn off MPLS */
1537 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1539 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1540 pkt_dev->svlan_id = 0xffff;
1543 printk("pktgen: VLAN/SVLAN turned off\n");
1548 if (!strcmp(name, "vlan_p")) {
1549 len = num_arg(&user_buffer[i], 1, &value);
1554 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1555 pkt_dev->vlan_p = value;
1556 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1558 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1563 if (!strcmp(name, "vlan_cfi")) {
1564 len = num_arg(&user_buffer[i], 1, &value);
1569 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1570 pkt_dev->vlan_cfi = value;
1571 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1573 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1578 if (!strcmp(name, "svlan_id")) {
1579 len = num_arg(&user_buffer[i], 4, &value);
1584 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1585 pkt_dev->svlan_id = value; /* turn on SVLAN */
1588 printk("pktgen: SVLAN turned on\n");
1590 if (debug && pkt_dev->nr_labels)
1591 printk("pktgen: MPLS auto turned off\n");
1593 pkt_dev->nr_labels = 0; /* turn off MPLS */
1594 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1596 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1597 pkt_dev->svlan_id = 0xffff;
1600 printk("pktgen: VLAN/SVLAN turned off\n");
1605 if (!strcmp(name, "svlan_p")) {
1606 len = num_arg(&user_buffer[i], 1, &value);
1611 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1612 pkt_dev->svlan_p = value;
1613 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1615 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1620 if (!strcmp(name, "svlan_cfi")) {
1621 len = num_arg(&user_buffer[i], 1, &value);
1626 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1627 pkt_dev->svlan_cfi = value;
1628 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1630 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1635 if (!strcmp(name, "tos")) {
1636 __u32 tmp_value = 0;
1637 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1643 pkt_dev->tos = tmp_value;
1644 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1646 sprintf(pg_result, "ERROR: tos must be 00-ff");
1651 if (!strcmp(name, "traffic_class")) {
1652 __u32 tmp_value = 0;
1653 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1659 pkt_dev->traffic_class = tmp_value;
1660 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1662 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1667 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1671 static int pktgen_if_open(struct inode *inode, struct file *file)
1673 return single_open(file, pktgen_if_show, PDE(inode)->data);
1676 static const struct file_operations pktgen_if_fops = {
1677 .owner = THIS_MODULE,
1678 .open = pktgen_if_open,
1680 .llseek = seq_lseek,
1681 .write = pktgen_if_write,
1682 .release = single_release,
1685 static int pktgen_thread_show(struct seq_file *seq, void *v)
1687 struct pktgen_thread *t = seq->private;
1688 struct pktgen_dev *pkt_dev;
1692 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1693 t->tsk->comm, t->max_before_softirq);
1695 seq_printf(seq, "Running: ");
1698 list_for_each_entry(pkt_dev, &t->if_list, list)
1699 if (pkt_dev->running)
1700 seq_printf(seq, "%s ", pkt_dev->ifname);
1702 seq_printf(seq, "\nStopped: ");
1704 list_for_each_entry(pkt_dev, &t->if_list, list)
1705 if (!pkt_dev->running)
1706 seq_printf(seq, "%s ", pkt_dev->ifname);
1709 seq_printf(seq, "\nResult: %s\n", t->result);
1711 seq_printf(seq, "\nResult: NA\n");
1718 static ssize_t pktgen_thread_write(struct file *file,
1719 const char __user * user_buffer,
1720 size_t count, loff_t * offset)
1722 struct seq_file *seq = (struct seq_file *)file->private_data;
1723 struct pktgen_thread *t = seq->private;
1724 int i = 0, max, len, ret;
1727 unsigned long value = 0;
1730 // sprintf(pg_result, "Wrong command format");
1735 len = count_trail_chars(&user_buffer[i], max);
1741 /* Read variable name */
1743 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1747 memset(name, 0, sizeof(name));
1748 if (copy_from_user(name, &user_buffer[i], len))
1753 len = count_trail_chars(&user_buffer[i], max);
1760 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1763 printk("pktgen: ERROR: No thread\n");
1768 pg_result = &(t->result[0]);
1770 if (!strcmp(name, "add_device")) {
1773 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1778 if (copy_from_user(f, &user_buffer[i], len))
1781 mutex_lock(&pktgen_thread_lock);
1782 pktgen_add_device(t, f);
1783 mutex_unlock(&pktgen_thread_lock);
1785 sprintf(pg_result, "OK: add_device=%s", f);
1789 if (!strcmp(name, "rem_device_all")) {
1790 mutex_lock(&pktgen_thread_lock);
1791 t->control |= T_REMDEVALL;
1792 mutex_unlock(&pktgen_thread_lock);
1793 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1795 sprintf(pg_result, "OK: rem_device_all");
1799 if (!strcmp(name, "max_before_softirq")) {
1800 len = num_arg(&user_buffer[i], 10, &value);
1801 mutex_lock(&pktgen_thread_lock);
1802 t->max_before_softirq = value;
1803 mutex_unlock(&pktgen_thread_lock);
1805 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1814 static int pktgen_thread_open(struct inode *inode, struct file *file)
1816 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1819 static const struct file_operations pktgen_thread_fops = {
1820 .owner = THIS_MODULE,
1821 .open = pktgen_thread_open,
1823 .llseek = seq_lseek,
1824 .write = pktgen_thread_write,
1825 .release = single_release,
1828 /* Think find or remove for NN */
1829 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1831 struct pktgen_thread *t;
1832 struct pktgen_dev *pkt_dev = NULL;
1834 list_for_each_entry(t, &pktgen_threads, th_list) {
1835 pkt_dev = pktgen_find_dev(t, ifname);
1839 pkt_dev->removal_mark = 1;
1840 t->control |= T_REMDEV;
1850 * mark a device for removal
1852 static int pktgen_mark_device(const char *ifname)
1854 struct pktgen_dev *pkt_dev = NULL;
1855 const int max_tries = 10, msec_per_try = 125;
1859 mutex_lock(&pktgen_thread_lock);
1860 PG_DEBUG(printk("pktgen: pktgen_mark_device marking %s for removal\n",
1865 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1866 if (pkt_dev == NULL)
1867 break; /* success */
1869 mutex_unlock(&pktgen_thread_lock);
1870 PG_DEBUG(printk("pktgen: pktgen_mark_device waiting for %s "
1871 "to disappear....\n", ifname));
1872 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1873 mutex_lock(&pktgen_thread_lock);
1875 if (++i >= max_tries) {
1876 printk("pktgen_mark_device: timed out after waiting "
1877 "%d msec for device %s to be removed\n",
1878 msec_per_try * i, ifname);
1885 mutex_unlock(&pktgen_thread_lock);
1890 static int pktgen_device_event(struct notifier_block *unused,
1891 unsigned long event, void *ptr)
1893 struct net_device *dev = (struct net_device *)(ptr);
1895 /* It is OK that we do not hold the group lock right now,
1896 * as we run under the RTNL lock.
1900 case NETDEV_CHANGEADDR:
1901 case NETDEV_GOING_DOWN:
1904 /* Ignore for now */
1907 case NETDEV_UNREGISTER:
1908 pktgen_mark_device(dev->name);
1915 /* Associate pktgen_dev with a device. */
1917 static struct net_device *pktgen_setup_dev(struct pktgen_dev *pkt_dev)
1919 struct net_device *odev;
1921 /* Clean old setups */
1923 if (pkt_dev->odev) {
1924 dev_put(pkt_dev->odev);
1925 pkt_dev->odev = NULL;
1928 odev = dev_get_by_name(pkt_dev->ifname);
1931 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1934 if (odev->type != ARPHRD_ETHER) {
1935 printk("pktgen: not an ethernet device: \"%s\"\n",
1939 if (!netif_running(odev)) {
1940 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1943 pkt_dev->odev = odev;
1945 return pkt_dev->odev;
1954 /* Read pkt_dev from the interface and set up internal pktgen_dev
1955 * structure to have the right information to create/send packets
1957 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1959 /* Try once more, just in case it works now. */
1961 pktgen_setup_dev(pkt_dev);
1963 if (!pkt_dev->odev) {
1964 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1965 sprintf(pkt_dev->result,
1966 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1970 /* Default to the interface's mac if not explicitly set. */
1972 if (is_zero_ether_addr(pkt_dev->src_mac))
1973 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1975 /* Set up Dest MAC */
1976 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1978 /* Set up pkt size */
1979 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1981 if (pkt_dev->flags & F_IPV6) {
1983 * Skip this automatic address setting until locks or functions
1988 int i, set = 0, err = 1;
1989 struct inet6_dev *idev;
1991 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1992 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2000 * Use linklevel address if unconfigured.
2002 * use ipv6_get_lladdr if/when it's get exported
2006 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2007 struct inet6_ifaddr *ifp;
2009 read_lock_bh(&idev->lock);
2010 for (ifp = idev->addr_list; ifp;
2011 ifp = ifp->if_next) {
2012 if (ifp->scope == IFA_LINK
2014 flags & IFA_F_TENTATIVE)) {
2015 ipv6_addr_copy(&pkt_dev->
2022 read_unlock_bh(&idev->lock);
2026 printk("pktgen: ERROR: IPv6 link address not availble.\n");
2030 pkt_dev->saddr_min = 0;
2031 pkt_dev->saddr_max = 0;
2032 if (strlen(pkt_dev->src_min) == 0) {
2034 struct in_device *in_dev;
2037 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2039 if (in_dev->ifa_list) {
2040 pkt_dev->saddr_min =
2041 in_dev->ifa_list->ifa_address;
2042 pkt_dev->saddr_max = pkt_dev->saddr_min;
2047 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2048 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2051 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2052 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2054 /* Initialize current values. */
2055 pkt_dev->cur_dst_mac_offset = 0;
2056 pkt_dev->cur_src_mac_offset = 0;
2057 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2058 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2059 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2060 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2061 pkt_dev->nflows = 0;
2064 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2069 start = now = getCurUs();
2070 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2071 while (now < spin_until_us) {
2072 /* TODO: optimize sleeping behavior */
2073 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2074 schedule_timeout_interruptible(1);
2075 else if (spin_until_us - now > 100) {
2077 if (!pkt_dev->running)
2086 pkt_dev->idle_acc += now - start;
2089 /* Increment/randomize headers according to flags and current values
2090 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2092 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2098 if (pkt_dev->cflows) {
2099 flow = pktgen_random() % pkt_dev->cflows;
2101 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2102 pkt_dev->flows[flow].count = 0;
2105 /* Deal with source MAC */
2106 if (pkt_dev->src_mac_count > 1) {
2110 if (pkt_dev->flags & F_MACSRC_RND)
2111 mc = pktgen_random() % (pkt_dev->src_mac_count);
2113 mc = pkt_dev->cur_src_mac_offset++;
2114 if (pkt_dev->cur_src_mac_offset >
2115 pkt_dev->src_mac_count)
2116 pkt_dev->cur_src_mac_offset = 0;
2119 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2120 pkt_dev->hh[11] = tmp;
2121 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2122 pkt_dev->hh[10] = tmp;
2123 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2124 pkt_dev->hh[9] = tmp;
2125 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2126 pkt_dev->hh[8] = tmp;
2127 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2128 pkt_dev->hh[7] = tmp;
2131 /* Deal with Destination MAC */
2132 if (pkt_dev->dst_mac_count > 1) {
2136 if (pkt_dev->flags & F_MACDST_RND)
2137 mc = pktgen_random() % (pkt_dev->dst_mac_count);
2140 mc = pkt_dev->cur_dst_mac_offset++;
2141 if (pkt_dev->cur_dst_mac_offset >
2142 pkt_dev->dst_mac_count) {
2143 pkt_dev->cur_dst_mac_offset = 0;
2147 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2148 pkt_dev->hh[5] = tmp;
2149 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2150 pkt_dev->hh[4] = tmp;
2151 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2152 pkt_dev->hh[3] = tmp;
2153 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2154 pkt_dev->hh[2] = tmp;
2155 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2156 pkt_dev->hh[1] = tmp;
2159 if (pkt_dev->flags & F_MPLS_RND) {
2161 for(i = 0; i < pkt_dev->nr_labels; i++)
2162 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2163 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2164 ((__force __be32)pktgen_random() &
2168 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2169 pkt_dev->vlan_id = pktgen_random() % 4096;
2172 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2173 pkt_dev->svlan_id = pktgen_random() % 4096;
2176 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2177 if (pkt_dev->flags & F_UDPSRC_RND)
2178 pkt_dev->cur_udp_src =
2180 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) +
2181 pkt_dev->udp_src_min);
2184 pkt_dev->cur_udp_src++;
2185 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2186 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2190 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2191 if (pkt_dev->flags & F_UDPDST_RND) {
2192 pkt_dev->cur_udp_dst =
2194 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) +
2195 pkt_dev->udp_dst_min);
2197 pkt_dev->cur_udp_dst++;
2198 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2199 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2203 if (!(pkt_dev->flags & F_IPV6)) {
2205 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2209 if (pkt_dev->flags & F_IPSRC_RND)
2210 t = ((pktgen_random() % (imx - imn)) + imn);
2212 t = ntohl(pkt_dev->cur_saddr);
2218 pkt_dev->cur_saddr = htonl(t);
2221 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
2222 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2224 imn = ntohl(pkt_dev->daddr_min);
2225 imx = ntohl(pkt_dev->daddr_max);
2229 if (pkt_dev->flags & F_IPDST_RND) {
2231 t = pktgen_random() % (imx - imn) + imn;
2234 while (LOOPBACK(s) || MULTICAST(s)
2235 || BADCLASS(s) || ZERONET(s)
2236 || LOCAL_MCAST(s)) {
2237 t = (pktgen_random() %
2241 pkt_dev->cur_daddr = s;
2243 t = ntohl(pkt_dev->cur_daddr);
2248 pkt_dev->cur_daddr = htonl(t);
2251 if (pkt_dev->cflows) {
2252 pkt_dev->flows[flow].cur_daddr =
2257 } else { /* IPV6 * */
2259 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2260 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2261 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2262 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2266 /* Only random destinations yet */
2268 for (i = 0; i < 4; i++) {
2269 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2270 (((__force __be32)pktgen_random() |
2271 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2272 pkt_dev->max_in6_daddr.s6_addr32[i]);
2277 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2279 if (pkt_dev->flags & F_TXSIZE_RND) {
2280 t = ((pktgen_random() %
2281 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
2282 + pkt_dev->min_pkt_size);
2284 t = pkt_dev->cur_pkt_size + 1;
2285 if (t > pkt_dev->max_pkt_size)
2286 t = pkt_dev->min_pkt_size;
2288 pkt_dev->cur_pkt_size = t;
2291 pkt_dev->flows[flow].count++;
2294 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2297 for(i = 0; i < pkt_dev->nr_labels; i++) {
2298 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2301 *mpls |= MPLS_STACK_BOTTOM;
2304 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2307 return htons(id | (cfi << 12) | (prio << 13));
2310 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2311 struct pktgen_dev *pkt_dev)
2313 struct sk_buff *skb = NULL;
2315 struct udphdr *udph;
2318 struct pktgen_hdr *pgh = NULL;
2319 __be16 protocol = __constant_htons(ETH_P_IP);
2321 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2322 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2323 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2324 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2327 if (pkt_dev->nr_labels)
2328 protocol = __constant_htons(ETH_P_MPLS_UC);
2330 if (pkt_dev->vlan_id != 0xffff)
2331 protocol = __constant_htons(ETH_P_8021Q);
2333 /* Update any of the values, used when we're incrementing various
2336 mod_cur_headers(pkt_dev);
2338 datalen = (odev->hard_header_len + 16) & ~0xf;
2339 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2340 pkt_dev->nr_labels*sizeof(u32) +
2341 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2344 sprintf(pkt_dev->result, "No memory");
2348 skb_reserve(skb, datalen);
2350 /* Reserve for ethernet and IP header */
2351 eth = (__u8 *) skb_push(skb, 14);
2352 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2353 if (pkt_dev->nr_labels)
2354 mpls_push(mpls, pkt_dev);
2356 if (pkt_dev->vlan_id != 0xffff) {
2357 if(pkt_dev->svlan_id != 0xffff) {
2358 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2359 *svlan_tci = build_tci(pkt_dev->svlan_id,
2362 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2363 *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
2365 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2366 *vlan_tci = build_tci(pkt_dev->vlan_id,
2369 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2370 *vlan_encapsulated_proto = __constant_htons(ETH_P_IP);
2373 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
2374 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2376 memcpy(eth, pkt_dev->hh, 12);
2377 *(__be16 *) & eth[12] = protocol;
2379 /* Eth + IPh + UDPh + mpls */
2380 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2381 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2382 if (datalen < sizeof(struct pktgen_hdr))
2383 datalen = sizeof(struct pktgen_hdr);
2385 udph->source = htons(pkt_dev->cur_udp_src);
2386 udph->dest = htons(pkt_dev->cur_udp_dst);
2387 udph->len = htons(datalen + 8); /* DATA + udphdr */
2388 udph->check = 0; /* No checksum */
2393 iph->tos = pkt_dev->tos;
2394 iph->protocol = IPPROTO_UDP; /* UDP */
2395 iph->saddr = pkt_dev->cur_saddr;
2396 iph->daddr = pkt_dev->cur_daddr;
2398 iplen = 20 + 8 + datalen;
2399 iph->tot_len = htons(iplen);
2401 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2402 skb->protocol = protocol;
2403 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2404 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2406 skb->pkt_type = PACKET_HOST;
2410 if (pkt_dev->nfrags <= 0)
2411 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2413 int frags = pkt_dev->nfrags;
2416 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2418 if (frags > MAX_SKB_FRAGS)
2419 frags = MAX_SKB_FRAGS;
2420 if (datalen > frags * PAGE_SIZE) {
2421 skb_put(skb, datalen - frags * PAGE_SIZE);
2422 datalen = frags * PAGE_SIZE;
2426 while (datalen > 0) {
2427 struct page *page = alloc_pages(GFP_KERNEL, 0);
2428 skb_shinfo(skb)->frags[i].page = page;
2429 skb_shinfo(skb)->frags[i].page_offset = 0;
2430 skb_shinfo(skb)->frags[i].size =
2431 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2432 datalen -= skb_shinfo(skb)->frags[i].size;
2433 skb->len += skb_shinfo(skb)->frags[i].size;
2434 skb->data_len += skb_shinfo(skb)->frags[i].size;
2436 skb_shinfo(skb)->nr_frags = i;
2445 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2449 skb_shinfo(skb)->frags[i - 1].size -= rem;
2451 skb_shinfo(skb)->frags[i] =
2452 skb_shinfo(skb)->frags[i - 1];
2453 get_page(skb_shinfo(skb)->frags[i].page);
2454 skb_shinfo(skb)->frags[i].page =
2455 skb_shinfo(skb)->frags[i - 1].page;
2456 skb_shinfo(skb)->frags[i].page_offset +=
2457 skb_shinfo(skb)->frags[i - 1].size;
2458 skb_shinfo(skb)->frags[i].size = rem;
2460 skb_shinfo(skb)->nr_frags = i;
2464 /* Stamp the time, and sequence number, convert them to network byte order */
2467 struct timeval timestamp;
2469 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2470 pgh->seq_num = htonl(pkt_dev->seq_num);
2472 do_gettimeofday(×tamp);
2473 pgh->tv_sec = htonl(timestamp.tv_sec);
2474 pgh->tv_usec = htonl(timestamp.tv_usec);
2481 * scan_ip6, fmt_ip taken from dietlibc-0.21
2482 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2484 * Slightly modified for kernel.
2485 * Should be candidate for net/ipv4/utils.c
2489 static unsigned int scan_ip6(const char *s, char ip[16])
2492 unsigned int len = 0;
2495 unsigned int prefixlen = 0;
2496 unsigned int suffixlen = 0;
2499 for (i = 0; i < 16; i++)
2505 if (s[1] == ':') { /* Found "::", skip to part 2 */
2514 u = simple_strtoul(s, &tmp, 16);
2520 if (prefixlen == 12 && s[i] == '.') {
2522 /* the last 4 bytes may be written as IPv4 address */
2525 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2528 ip[prefixlen++] = (u >> 8);
2529 ip[prefixlen++] = (u & 255);
2532 if (prefixlen == 16)
2536 /* part 2, after "::" */
2543 } else if (suffixlen != 0)
2547 u = simple_strtol(s, &tmp, 16);
2555 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2557 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2563 suffix[suffixlen++] = (u >> 8);
2564 suffix[suffixlen++] = (u & 255);
2567 if (prefixlen + suffixlen == 16)
2570 for (i = 0; i < suffixlen; i++)
2571 ip[16 - suffixlen + i] = suffix[i];
2575 static char tohex(char hexdigit)
2577 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2580 static int fmt_xlong(char *s, unsigned int i)
2583 *s = tohex((i >> 12) & 0xf);
2584 if (s != bak || *s != '0')
2586 *s = tohex((i >> 8) & 0xf);
2587 if (s != bak || *s != '0')
2589 *s = tohex((i >> 4) & 0xf);
2590 if (s != bak || *s != '0')
2592 *s = tohex(i & 0xf);
2596 static unsigned int fmt_ip6(char *s, const char ip[16])
2601 unsigned int compressing;
2606 for (j = 0; j < 16; j += 2) {
2608 #ifdef V4MAPPEDPREFIX
2609 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2610 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2615 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2616 (unsigned long)(unsigned char)ip[j + 1];
2631 i = fmt_xlong(s, temp);
2648 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2649 struct pktgen_dev *pkt_dev)
2651 struct sk_buff *skb = NULL;
2653 struct udphdr *udph;
2655 struct ipv6hdr *iph;
2656 struct pktgen_hdr *pgh = NULL;
2657 __be16 protocol = __constant_htons(ETH_P_IPV6);
2659 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2660 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2661 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2662 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2664 if (pkt_dev->nr_labels)
2665 protocol = __constant_htons(ETH_P_MPLS_UC);
2667 if (pkt_dev->vlan_id != 0xffff)
2668 protocol = __constant_htons(ETH_P_8021Q);
2670 /* Update any of the values, used when we're incrementing various
2673 mod_cur_headers(pkt_dev);
2675 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2676 pkt_dev->nr_labels*sizeof(u32) +
2677 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2680 sprintf(pkt_dev->result, "No memory");
2684 skb_reserve(skb, 16);
2686 /* Reserve for ethernet and IP header */
2687 eth = (__u8 *) skb_push(skb, 14);
2688 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2689 if (pkt_dev->nr_labels)
2690 mpls_push(mpls, pkt_dev);
2692 if (pkt_dev->vlan_id != 0xffff) {
2693 if(pkt_dev->svlan_id != 0xffff) {
2694 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2695 *svlan_tci = build_tci(pkt_dev->svlan_id,
2698 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2699 *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
2701 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2702 *vlan_tci = build_tci(pkt_dev->vlan_id,
2705 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2706 *vlan_encapsulated_proto = __constant_htons(ETH_P_IPV6);
2709 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2710 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2712 memcpy(eth, pkt_dev->hh, 12);
2713 *(__be16 *) & eth[12] = protocol;
2715 /* Eth + IPh + UDPh + mpls */
2716 datalen = pkt_dev->cur_pkt_size - 14 -
2717 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2718 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2720 if (datalen < sizeof(struct pktgen_hdr)) {
2721 datalen = sizeof(struct pktgen_hdr);
2722 if (net_ratelimit())
2723 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2727 udph->source = htons(pkt_dev->cur_udp_src);
2728 udph->dest = htons(pkt_dev->cur_udp_dst);
2729 udph->len = htons(datalen + sizeof(struct udphdr));
2730 udph->check = 0; /* No checksum */
2732 *(__be32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
2734 if (pkt_dev->traffic_class) {
2735 /* Version + traffic class + flow (0) */
2736 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2739 iph->hop_limit = 32;
2741 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2742 iph->nexthdr = IPPROTO_UDP;
2744 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2745 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2747 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2748 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2749 skb->protocol = protocol;
2751 skb->pkt_type = PACKET_HOST;
2752 skb->nh.ipv6h = iph;
2755 if (pkt_dev->nfrags <= 0)
2756 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2758 int frags = pkt_dev->nfrags;
2761 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2763 if (frags > MAX_SKB_FRAGS)
2764 frags = MAX_SKB_FRAGS;
2765 if (datalen > frags * PAGE_SIZE) {
2766 skb_put(skb, datalen - frags * PAGE_SIZE);
2767 datalen = frags * PAGE_SIZE;
2771 while (datalen > 0) {
2772 struct page *page = alloc_pages(GFP_KERNEL, 0);
2773 skb_shinfo(skb)->frags[i].page = page;
2774 skb_shinfo(skb)->frags[i].page_offset = 0;
2775 skb_shinfo(skb)->frags[i].size =
2776 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2777 datalen -= skb_shinfo(skb)->frags[i].size;
2778 skb->len += skb_shinfo(skb)->frags[i].size;
2779 skb->data_len += skb_shinfo(skb)->frags[i].size;
2781 skb_shinfo(skb)->nr_frags = i;
2790 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2794 skb_shinfo(skb)->frags[i - 1].size -= rem;
2796 skb_shinfo(skb)->frags[i] =
2797 skb_shinfo(skb)->frags[i - 1];
2798 get_page(skb_shinfo(skb)->frags[i].page);
2799 skb_shinfo(skb)->frags[i].page =
2800 skb_shinfo(skb)->frags[i - 1].page;
2801 skb_shinfo(skb)->frags[i].page_offset +=
2802 skb_shinfo(skb)->frags[i - 1].size;
2803 skb_shinfo(skb)->frags[i].size = rem;
2805 skb_shinfo(skb)->nr_frags = i;
2809 /* Stamp the time, and sequence number, convert them to network byte order */
2810 /* should we update cloned packets too ? */
2812 struct timeval timestamp;
2814 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2815 pgh->seq_num = htonl(pkt_dev->seq_num);
2817 do_gettimeofday(×tamp);
2818 pgh->tv_sec = htonl(timestamp.tv_sec);
2819 pgh->tv_usec = htonl(timestamp.tv_usec);
2821 /* pkt_dev->seq_num++; FF: you really mean this? */
2826 static inline struct sk_buff *fill_packet(struct net_device *odev,
2827 struct pktgen_dev *pkt_dev)
2829 if (pkt_dev->flags & F_IPV6)
2830 return fill_packet_ipv6(odev, pkt_dev);
2832 return fill_packet_ipv4(odev, pkt_dev);
2835 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2837 pkt_dev->seq_num = 1;
2838 pkt_dev->idle_acc = 0;
2840 pkt_dev->tx_bytes = 0;
2841 pkt_dev->errors = 0;
2844 /* Set up structure for sending pkts, clear counters */
2846 static void pktgen_run(struct pktgen_thread *t)
2848 struct pktgen_dev *pkt_dev;
2851 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2854 list_for_each_entry(pkt_dev, &t->if_list, list) {
2857 * setup odev and create initial packet.
2859 pktgen_setup_inject(pkt_dev);
2861 if (pkt_dev->odev) {
2862 pktgen_clear_counters(pkt_dev);
2863 pkt_dev->running = 1; /* Cranke yeself! */
2864 pkt_dev->skb = NULL;
2865 pkt_dev->started_at = getCurUs();
2866 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2867 pkt_dev->next_tx_ns = 0;
2869 strcpy(pkt_dev->result, "Starting");
2872 strcpy(pkt_dev->result, "Error starting");
2876 t->control &= ~(T_STOP);
2879 static void pktgen_stop_all_threads_ifs(void)
2881 struct pktgen_thread *t;
2883 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads_ifs.\n"));
2885 mutex_lock(&pktgen_thread_lock);
2887 list_for_each_entry(t, &pktgen_threads, th_list)
2888 t->control |= T_STOP;
2890 mutex_unlock(&pktgen_thread_lock);
2893 static int thread_is_running(struct pktgen_thread *t)
2895 struct pktgen_dev *pkt_dev;
2898 list_for_each_entry(pkt_dev, &t->if_list, list)
2899 if (pkt_dev->running) {
2906 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2910 while (thread_is_running(t)) {
2914 msleep_interruptible(100);
2916 if (signal_pending(current))
2926 static int pktgen_wait_all_threads_run(void)
2928 struct pktgen_thread *t;
2931 mutex_lock(&pktgen_thread_lock);
2933 list_for_each_entry(t, &pktgen_threads, th_list) {
2934 sig = pktgen_wait_thread_run(t);
2940 list_for_each_entry(t, &pktgen_threads, th_list)
2941 t->control |= (T_STOP);
2943 mutex_unlock(&pktgen_thread_lock);
2947 static void pktgen_run_all_threads(void)
2949 struct pktgen_thread *t;
2951 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2953 mutex_lock(&pktgen_thread_lock);
2955 list_for_each_entry(t, &pktgen_threads, th_list)
2956 t->control |= (T_RUN);
2958 mutex_unlock(&pktgen_thread_lock);
2960 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2962 pktgen_wait_all_threads_run();
2965 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2967 __u64 total_us, bps, mbps, pps, idle;
2968 char *p = pkt_dev->result;
2970 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2972 idle = pkt_dev->idle_acc;
2974 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2975 (unsigned long long)total_us,
2976 (unsigned long long)(total_us - idle),
2977 (unsigned long long)idle,
2978 (unsigned long long)pkt_dev->sofar,
2979 pkt_dev->cur_pkt_size, nr_frags);
2981 pps = pkt_dev->sofar * USEC_PER_SEC;
2983 while ((total_us >> 32) != 0) {
2988 do_div(pps, total_us);
2990 bps = pps * 8 * pkt_dev->cur_pkt_size;
2993 do_div(mbps, 1000000);
2994 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2995 (unsigned long long)pps,
2996 (unsigned long long)mbps,
2997 (unsigned long long)bps,
2998 (unsigned long long)pkt_dev->errors);
3001 /* Set stopped-at timer, remove from running list, do counters & statistics */
3003 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3005 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3007 if (!pkt_dev->running) {
3008 printk("pktgen: interface: %s is already stopped\n",
3013 pkt_dev->stopped_at = getCurUs();
3014 pkt_dev->running = 0;
3016 show_results(pkt_dev, nr_frags);
3021 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3023 struct pktgen_dev *pkt_dev, *best = NULL;
3027 list_for_each_entry(pkt_dev, &t->if_list, list) {
3028 if (!pkt_dev->running)
3032 else if (pkt_dev->next_tx_us < best->next_tx_us)
3039 static void pktgen_stop(struct pktgen_thread *t)
3041 struct pktgen_dev *pkt_dev;
3043 PG_DEBUG(printk("pktgen: entering pktgen_stop\n"));
3047 list_for_each_entry(pkt_dev, &t->if_list, list) {
3048 pktgen_stop_device(pkt_dev);
3050 kfree_skb(pkt_dev->skb);
3052 pkt_dev->skb = NULL;
3059 * one of our devices needs to be removed - find it
3062 static void pktgen_rem_one_if(struct pktgen_thread *t)
3064 struct list_head *q, *n;
3065 struct pktgen_dev *cur;
3067 PG_DEBUG(printk("pktgen: entering pktgen_rem_one_if\n"));
3071 list_for_each_safe(q, n, &t->if_list) {
3072 cur = list_entry(q, struct pktgen_dev, list);
3074 if (!cur->removal_mark)
3078 kfree_skb(cur->skb);
3081 pktgen_remove_device(t, cur);
3089 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3091 struct list_head *q, *n;
3092 struct pktgen_dev *cur;
3094 /* Remove all devices, free mem */
3096 PG_DEBUG(printk("pktgen: entering pktgen_rem_all_ifs\n"));
3099 list_for_each_safe(q, n, &t->if_list) {
3100 cur = list_entry(q, struct pktgen_dev, list);
3103 kfree_skb(cur->skb);
3106 pktgen_remove_device(t, cur);
3112 static void pktgen_rem_thread(struct pktgen_thread *t)
3114 /* Remove from the thread list */
3116 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3118 mutex_lock(&pktgen_thread_lock);
3120 list_del(&t->th_list);
3122 mutex_unlock(&pktgen_thread_lock);
3125 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3127 struct net_device *odev = NULL;
3128 __u64 idle_start = 0;
3131 odev = pkt_dev->odev;
3133 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3137 if (now < pkt_dev->next_tx_us)
3138 spin(pkt_dev, pkt_dev->next_tx_us);
3140 /* This is max DELAY, this has special meaning of
3143 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3144 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3145 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3150 if (netif_queue_stopped(odev) || need_resched()) {
3151 idle_start = getCurUs();
3153 if (!netif_running(odev)) {
3154 pktgen_stop_device(pkt_dev);
3156 kfree_skb(pkt_dev->skb);
3157 pkt_dev->skb = NULL;
3163 pkt_dev->idle_acc += getCurUs() - idle_start;
3165 if (netif_queue_stopped(odev)) {
3166 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3167 pkt_dev->next_tx_ns = 0;
3168 goto out; /* Try the next interface */
3172 if (pkt_dev->last_ok || !pkt_dev->skb) {
3173 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3174 || (!pkt_dev->skb)) {
3175 /* build a new pkt */
3177 kfree_skb(pkt_dev->skb);
3179 pkt_dev->skb = fill_packet(odev, pkt_dev);
3180 if (pkt_dev->skb == NULL) {
3181 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
3183 pkt_dev->clone_count--; /* back out increment, OOM */
3186 pkt_dev->allocated_skbs++;
3187 pkt_dev->clone_count = 0; /* reset counter */
3191 netif_tx_lock_bh(odev);
3192 if (!netif_queue_stopped(odev)) {
3194 atomic_inc(&(pkt_dev->skb->users));
3196 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3197 if (likely(ret == NETDEV_TX_OK)) {
3198 pkt_dev->last_ok = 1;
3201 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3203 } else if (ret == NETDEV_TX_LOCKED
3204 && (odev->features & NETIF_F_LLTX)) {
3207 } else { /* Retry it next time */
3209 atomic_dec(&(pkt_dev->skb->users));
3211 if (debug && net_ratelimit())
3212 printk(KERN_INFO "pktgen: Hard xmit error\n");
3215 pkt_dev->last_ok = 0;
3218 pkt_dev->next_tx_us = getCurUs();
3219 pkt_dev->next_tx_ns = 0;
3221 pkt_dev->next_tx_us += pkt_dev->delay_us;
3222 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3224 if (pkt_dev->next_tx_ns > 1000) {
3225 pkt_dev->next_tx_us++;
3226 pkt_dev->next_tx_ns -= 1000;
3230 else { /* Retry it next time */
3231 pkt_dev->last_ok = 0;
3232 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3233 pkt_dev->next_tx_ns = 0;
3236 netif_tx_unlock_bh(odev);
3238 /* If pkt_dev->count is zero, then run forever */
3239 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3240 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3241 idle_start = getCurUs();
3242 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3243 if (signal_pending(current)) {
3248 pkt_dev->idle_acc += getCurUs() - idle_start;
3251 /* Done with this */
3252 pktgen_stop_device(pkt_dev);
3254 kfree_skb(pkt_dev->skb);
3255 pkt_dev->skb = NULL;
3261 * Main loop of the thread goes here
3264 static int pktgen_thread_worker(void *arg)
3267 struct pktgen_thread *t = arg;
3268 struct pktgen_dev *pkt_dev = NULL;
3270 u32 max_before_softirq;
3271 u32 tx_since_softirq = 0;
3273 BUG_ON(smp_processor_id() != cpu);
3275 init_waitqueue_head(&t->queue);
3277 t->pid = current->pid;
3279 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
3281 max_before_softirq = t->max_before_softirq;
3283 set_current_state(TASK_INTERRUPTIBLE);
3285 while (!kthread_should_stop()) {
3286 pkt_dev = next_to_run(t);
3289 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3291 prepare_to_wait(&(t->queue), &wait,
3292 TASK_INTERRUPTIBLE);
3293 schedule_timeout(HZ / 10);
3294 finish_wait(&(t->queue), &wait);
3297 __set_current_state(TASK_RUNNING);
3301 pktgen_xmit(pkt_dev);
3304 * We like to stay RUNNING but must also give
3305 * others fair share.
3308 tx_since_softirq += pkt_dev->last_ok;
3310 if (tx_since_softirq > max_before_softirq) {
3311 if (local_softirq_pending())
3313 tx_since_softirq = 0;
3317 if (t->control & T_STOP) {
3319 t->control &= ~(T_STOP);
3322 if (t->control & T_RUN) {
3324 t->control &= ~(T_RUN);
3327 if (t->control & T_REMDEVALL) {
3328 pktgen_rem_all_ifs(t);
3329 t->control &= ~(T_REMDEVALL);
3332 if (t->control & T_REMDEV) {
3333 pktgen_rem_one_if(t);
3334 t->control &= ~(T_REMDEV);
3339 set_current_state(TASK_INTERRUPTIBLE);
3342 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->tsk->comm));
3345 PG_DEBUG(printk("pktgen: %s removing all device\n", t->tsk->comm));
3346 pktgen_rem_all_ifs(t);
3348 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->tsk->comm));
3349 pktgen_rem_thread(t);
3354 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3357 struct pktgen_dev *p, *pkt_dev = NULL;
3360 list_for_each_entry(p, &t->if_list, list)
3361 if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
3367 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev));
3372 * Adds a dev at front of if_list.
3375 static int add_dev_to_thread(struct pktgen_thread *t,
3376 struct pktgen_dev *pkt_dev)
3382 if (pkt_dev->pg_thread) {
3383 printk("pktgen: ERROR: already assigned to a thread.\n");
3388 list_add(&pkt_dev->list, &t->if_list);
3389 pkt_dev->pg_thread = t;
3390 pkt_dev->running = 0;
3397 /* Called under thread lock */
3399 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3401 struct pktgen_dev *pkt_dev;
3402 struct proc_dir_entry *pe;
3404 /* We don't allow a device to be on several threads */
3406 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3408 printk("pktgen: ERROR: interface already used.\n");
3412 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3416 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3417 if (pkt_dev->flows == NULL) {
3421 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3423 pkt_dev->removal_mark = 0;
3424 pkt_dev->min_pkt_size = ETH_ZLEN;
3425 pkt_dev->max_pkt_size = ETH_ZLEN;
3426 pkt_dev->nfrags = 0;
3427 pkt_dev->clone_skb = pg_clone_skb_d;
3428 pkt_dev->delay_us = pg_delay_d / 1000;
3429 pkt_dev->delay_ns = pg_delay_d % 1000;
3430 pkt_dev->count = pg_count_d;
3432 pkt_dev->udp_src_min = 9; /* sink port */
3433 pkt_dev->udp_src_max = 9;
3434 pkt_dev->udp_dst_min = 9;
3435 pkt_dev->udp_dst_max = 9;
3437 pkt_dev->vlan_p = 0;
3438 pkt_dev->vlan_cfi = 0;
3439 pkt_dev->vlan_id = 0xffff;
3440 pkt_dev->svlan_p = 0;
3441 pkt_dev->svlan_cfi = 0;
3442 pkt_dev->svlan_id = 0xffff;
3444 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
3446 if (!pktgen_setup_dev(pkt_dev)) {
3447 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
3449 vfree(pkt_dev->flows);
3454 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
3456 printk("pktgen: cannot create %s/%s procfs entry.\n",
3457 PG_PROC_DIR, ifname);
3459 vfree(pkt_dev->flows);
3463 pe->proc_fops = &pktgen_if_fops;
3466 return add_dev_to_thread(t, pkt_dev);
3469 static int __init pktgen_create_thread(int cpu)
3471 struct pktgen_thread *t;
3472 struct proc_dir_entry *pe;
3473 struct task_struct *p;
3475 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3477 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3481 spin_lock_init(&t->if_lock);
3484 INIT_LIST_HEAD(&t->if_list);
3486 list_add_tail(&t->th_list, &pktgen_threads);
3488 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3490 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3491 list_del(&t->th_list);
3495 kthread_bind(p, cpu);
3498 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3500 printk("pktgen: cannot create %s/%s procfs entry.\n",
3501 PG_PROC_DIR, t->tsk->comm);
3503 list_del(&t->th_list);
3508 pe->proc_fops = &pktgen_thread_fops;
3517 * Removes a device from the thread if_list.
3519 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3520 struct pktgen_dev *pkt_dev)
3522 struct list_head *q, *n;
3523 struct pktgen_dev *p;
3525 list_for_each_safe(q, n, &t->if_list) {
3526 p = list_entry(q, struct pktgen_dev, list);
3532 static int pktgen_remove_device(struct pktgen_thread *t,
3533 struct pktgen_dev *pkt_dev)
3536 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
3538 if (pkt_dev->running) {
3539 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3540 pktgen_stop_device(pkt_dev);
3543 /* Dis-associate from the interface */
3545 if (pkt_dev->odev) {
3546 dev_put(pkt_dev->odev);
3547 pkt_dev->odev = NULL;
3550 /* And update the thread if_list */
3552 _rem_dev_from_if_list(t, pkt_dev);
3554 /* Clean up proc file system */
3556 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
3559 vfree(pkt_dev->flows);
3564 static int __init pg_init(void)
3567 struct proc_dir_entry *pe;
3571 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3574 pg_proc_dir->owner = THIS_MODULE;
3576 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3578 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3580 proc_net_remove(PG_PROC_DIR);
3584 pe->proc_fops = &pktgen_fops;
3587 /* Register us to receive netdevice events */
3588 register_netdevice_notifier(&pktgen_notifier_block);
3590 for_each_online_cpu(cpu) {
3593 err = pktgen_create_thread(cpu);
3595 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3599 if (list_empty(&pktgen_threads)) {
3600 printk("pktgen: ERROR: Initialization failed for all threads\n");
3601 unregister_netdevice_notifier(&pktgen_notifier_block);
3602 remove_proc_entry(PGCTRL, pg_proc_dir);
3603 proc_net_remove(PG_PROC_DIR);
3610 static void __exit pg_cleanup(void)
3612 struct pktgen_thread *t;
3613 struct list_head *q, *n;
3614 wait_queue_head_t queue;
3615 init_waitqueue_head(&queue);
3617 /* Stop all interfaces & threads */
3619 list_for_each_safe(q, n, &pktgen_threads) {
3620 t = list_entry(q, struct pktgen_thread, th_list);
3621 kthread_stop(t->tsk);
3625 /* Un-register us from receiving netdevice events */
3626 unregister_netdevice_notifier(&pktgen_notifier_block);
3628 /* Clean up proc file system */
3629 remove_proc_entry(PGCTRL, pg_proc_dir);
3630 proc_net_remove(PG_PROC_DIR);
3633 module_init(pg_init);
3634 module_exit(pg_cleanup);
3636 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3637 MODULE_DESCRIPTION("Packet Generator tool");
3638 MODULE_LICENSE("GPL");
3639 module_param(pg_count_d, int, 0);
3640 module_param(pg_delay_d, int, 0);
3641 module_param(pg_clone_skb_d, int, 0);
3642 module_param(debug, int, 0);