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 /* The buckets are exponential in 'width' */
168 #define LAT_BUCKETS_MAX 32
169 #define IP_NAME_SZ 32
170 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
171 #define MPLS_STACK_BOTTOM htonl(0x00000100)
173 /* Device flag bits */
174 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
175 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
176 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
177 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
178 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
179 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
180 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
181 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
182 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
183 #define F_VID_RND (1<<9) /* Random VLAN ID */
184 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
186 /* Thread control flag bits */
187 #define T_TERMINATE (1<<0)
188 #define T_STOP (1<<1) /* Stop run */
189 #define T_RUN (1<<2) /* Start run */
190 #define T_REMDEVALL (1<<3) /* Remove all devs */
191 #define T_REMDEV (1<<4) /* Remove one dev */
193 /* If lock -- can be removed after some work */
194 #define if_lock(t) spin_lock(&(t->if_lock));
195 #define if_unlock(t) spin_unlock(&(t->if_lock));
197 /* Used to help with determining the pkts on receive */
198 #define PKTGEN_MAGIC 0xbe9be955
199 #define PG_PROC_DIR "pktgen"
200 #define PGCTRL "pgctrl"
201 static struct proc_dir_entry *pg_proc_dir = NULL;
203 #define MAX_CFLOWS 65536
205 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
206 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
215 * Try to keep frequent/infrequent used vars. separated.
217 struct proc_dir_entry *entry; /* proc file */
218 struct pktgen_thread *pg_thread;/* the owner */
219 struct list_head list; /* Used for chaining in the thread's run-queue */
221 int running; /* if this changes to false, the test will stop */
223 /* If min != max, then we will either do a linear iteration, or
224 * we will do a random selection from within the range.
227 int removal_mark; /* non-zero => the device is marked for
228 * removal by worker thread */
230 int min_pkt_size; /* = ETH_ZLEN; */
231 int max_pkt_size; /* = ETH_ZLEN; */
233 __u32 delay_us; /* Default delay */
235 __u64 count; /* Default No packets to send */
236 __u64 sofar; /* How many pkts we've sent so far */
237 __u64 tx_bytes; /* How many bytes we've transmitted */
238 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
240 /* runtime counters relating to clone_skb */
241 __u64 next_tx_us; /* timestamp of when to tx next */
244 __u64 allocated_skbs;
246 int last_ok; /* Was last skb sent?
247 * Or a failed transmit of some sort? This will keep
248 * sequence numbers in order, for example.
250 __u64 started_at; /* micro-seconds */
251 __u64 stopped_at; /* micro-seconds */
252 __u64 idle_acc; /* micro-seconds */
255 int clone_skb; /* Use multiple SKBs during packet gen. If this number
256 * is greater than 1, then that many copies of the same
257 * packet will be sent before a new packet is allocated.
258 * For instance, if you want to send 1024 identical packets
259 * before creating a new packet, set clone_skb to 1024.
262 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
263 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
264 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
265 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
267 struct in6_addr in6_saddr;
268 struct in6_addr in6_daddr;
269 struct in6_addr cur_in6_daddr;
270 struct in6_addr cur_in6_saddr;
272 struct in6_addr min_in6_daddr;
273 struct in6_addr max_in6_daddr;
274 struct in6_addr min_in6_saddr;
275 struct in6_addr max_in6_saddr;
277 /* If we're doing ranges, random or incremental, then this
278 * defines the min/max for those ranges.
280 __be32 saddr_min; /* inclusive, source IP address */
281 __be32 saddr_max; /* exclusive, source IP address */
282 __be32 daddr_min; /* inclusive, dest IP address */
283 __be32 daddr_max; /* exclusive, dest IP address */
285 __u16 udp_src_min; /* inclusive, source UDP port */
286 __u16 udp_src_max; /* exclusive, source UDP port */
287 __u16 udp_dst_min; /* inclusive, dest UDP port */
288 __u16 udp_dst_max; /* exclusive, dest UDP port */
291 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
292 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
295 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
296 __be32 labels[MAX_MPLS_LABELS];
298 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
301 __u16 vlan_id; /* 0xffff means no vlan tag */
305 __u16 svlan_id; /* 0xffff means no svlan tag */
307 __u32 src_mac_count; /* How many MACs to iterate through */
308 __u32 dst_mac_count; /* How many MACs to iterate through */
310 unsigned char dst_mac[ETH_ALEN];
311 unsigned char src_mac[ETH_ALEN];
313 __u32 cur_dst_mac_offset;
314 __u32 cur_src_mac_offset;
323 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
325 We fill in SRC address later
326 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
330 __u16 pad; /* pad out the hh struct to an even 16 bytes */
332 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
333 * are transmitting the same one multiple times
335 struct net_device *odev; /* The out-going device. Note that the device should
336 * have it's pg_info pointer pointing back to this
337 * device. This will be set when the user specifies
338 * the out-going device name (not when the inject is
339 * started as it used to do.)
341 struct flow_state *flows;
342 unsigned cflows; /* Concurrent flows (config) */
343 unsigned lflow; /* Flow length (config) */
344 unsigned nflows; /* accumulated flows (stats) */
356 struct pktgen_thread {
358 struct list_head if_list; /* All device here */
359 struct list_head th_list;
360 struct task_struct *tsk;
362 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
364 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
370 wait_queue_head_t queue;
376 /* This code works around the fact that do_div cannot handle two 64-bit
377 numbers, and regular 64-bit division doesn't work on x86 kernels.
383 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
384 * Function copied/adapted/optimized from:
386 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
388 * Copyright 1994, University of Cambridge Computer Laboratory
389 * All Rights Reserved.
392 static inline s64 divremdi3(s64 x, s64 y, int type)
394 u64 a = (x < 0) ? -x : x;
395 u64 b = (y < 0) ? -y : y;
415 if (PG_DIV == type) {
416 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
418 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
422 /* End of hacks to deal with 64-bit math on x86 */
424 /** Convert to milliseconds */
425 static inline __u64 tv_to_ms(const struct timeval *tv)
427 __u64 ms = tv->tv_usec / 1000;
428 ms += (__u64) tv->tv_sec * (__u64) 1000;
432 /** Convert to micro-seconds */
433 static inline __u64 tv_to_us(const struct timeval *tv)
435 __u64 us = tv->tv_usec;
436 us += (__u64) tv->tv_sec * (__u64) 1000000;
440 static inline __u64 pg_div(__u64 n, __u32 base)
444 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
449 static inline __u64 pg_div64(__u64 n, __u64 base)
453 * How do we know if the architecture we are running on
454 * supports division with 64 bit base?
457 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
461 tmp = divremdi3(n, base, PG_DIV);
466 static inline __u64 getCurMs(void)
469 do_gettimeofday(&tv);
470 return tv_to_ms(&tv);
473 static inline __u64 getCurUs(void)
476 do_gettimeofday(&tv);
477 return tv_to_us(&tv);
480 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
482 return tv_to_us(a) - tv_to_us(b);
485 /* old include end */
487 static char version[] __initdata = VERSION;
489 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
490 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
491 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
493 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
494 static void pktgen_run_all_threads(void);
495 static void pktgen_stop_all_threads_ifs(void);
496 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
497 static void pktgen_stop(struct pktgen_thread *t);
498 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
500 static unsigned int scan_ip6(const char *s, char ip[16]);
501 static unsigned int fmt_ip6(char *s, const char ip[16]);
503 /* Module parameters, defaults. */
504 static int pg_count_d = 1000; /* 1000 pkts by default */
505 static int pg_delay_d;
506 static int pg_clone_skb_d;
509 static DEFINE_MUTEX(pktgen_thread_lock);
510 static LIST_HEAD(pktgen_threads);
512 static struct notifier_block pktgen_notifier_block = {
513 .notifier_call = pktgen_device_event,
517 * /proc handling functions
521 static int pgctrl_show(struct seq_file *seq, void *v)
523 seq_puts(seq, VERSION);
527 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
528 size_t count, loff_t * ppos)
533 if (!capable(CAP_NET_ADMIN)) {
538 if (count > sizeof(data))
539 count = sizeof(data);
541 if (copy_from_user(data, buf, count)) {
545 data[count - 1] = 0; /* Make string */
547 if (!strcmp(data, "stop"))
548 pktgen_stop_all_threads_ifs();
550 else if (!strcmp(data, "start"))
551 pktgen_run_all_threads();
554 printk("pktgen: Unknown command: %s\n", data);
562 static int pgctrl_open(struct inode *inode, struct file *file)
564 return single_open(file, pgctrl_show, PDE(inode)->data);
567 static const struct file_operations pktgen_fops = {
568 .owner = THIS_MODULE,
572 .write = pgctrl_write,
573 .release = single_release,
576 static int pktgen_if_show(struct seq_file *seq, void *v)
579 struct pktgen_dev *pkt_dev = seq->private;
582 __u64 now = getCurUs();
585 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
586 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
587 pkt_dev->max_pkt_size);
590 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
592 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
593 pkt_dev->clone_skb, pkt_dev->odev->name);
595 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
598 if (pkt_dev->flags & F_IPV6) {
599 char b1[128], b2[128], b3[128];
600 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
601 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
602 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
604 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
607 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
608 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
609 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
611 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
616 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
617 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
620 seq_puts(seq, " src_mac: ");
622 if (is_zero_ether_addr(pkt_dev->src_mac))
623 for (i = 0; i < 6; i++)
624 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
627 for (i = 0; i < 6; i++)
628 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
631 seq_printf(seq, "dst_mac: ");
632 for (i = 0; i < 6; i++)
633 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
634 i == 5 ? "\n" : ":");
637 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
638 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
639 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
642 " src_mac_count: %d dst_mac_count: %d\n",
643 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
645 if (pkt_dev->nr_labels) {
647 seq_printf(seq, " mpls: ");
648 for (i = 0; i < pkt_dev->nr_labels; i++)
649 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
650 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
653 if (pkt_dev->vlan_id != 0xffff) {
654 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
655 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
658 if (pkt_dev->svlan_id != 0xffff) {
659 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
660 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
664 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
667 if (pkt_dev->traffic_class) {
668 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
671 seq_printf(seq, " Flags: ");
673 if (pkt_dev->flags & F_IPV6)
674 seq_printf(seq, "IPV6 ");
676 if (pkt_dev->flags & F_IPSRC_RND)
677 seq_printf(seq, "IPSRC_RND ");
679 if (pkt_dev->flags & F_IPDST_RND)
680 seq_printf(seq, "IPDST_RND ");
682 if (pkt_dev->flags & F_TXSIZE_RND)
683 seq_printf(seq, "TXSIZE_RND ");
685 if (pkt_dev->flags & F_UDPSRC_RND)
686 seq_printf(seq, "UDPSRC_RND ");
688 if (pkt_dev->flags & F_UDPDST_RND)
689 seq_printf(seq, "UDPDST_RND ");
691 if (pkt_dev->flags & F_MPLS_RND)
692 seq_printf(seq, "MPLS_RND ");
694 if (pkt_dev->flags & F_MACSRC_RND)
695 seq_printf(seq, "MACSRC_RND ");
697 if (pkt_dev->flags & F_MACDST_RND)
698 seq_printf(seq, "MACDST_RND ");
700 if (pkt_dev->flags & F_VID_RND)
701 seq_printf(seq, "VID_RND ");
703 if (pkt_dev->flags & F_SVID_RND)
704 seq_printf(seq, "SVID_RND ");
708 sa = pkt_dev->started_at;
709 stopped = pkt_dev->stopped_at;
710 if (pkt_dev->running)
711 stopped = now; /* not really stopped, more like last-running-at */
714 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
715 (unsigned long long)pkt_dev->sofar,
716 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
717 (unsigned long long)stopped,
718 (unsigned long long)pkt_dev->idle_acc);
721 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
722 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
723 pkt_dev->cur_src_mac_offset);
725 if (pkt_dev->flags & F_IPV6) {
726 char b1[128], b2[128];
727 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
728 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
729 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
731 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
732 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
734 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
735 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
737 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
739 if (pkt_dev->result[0])
740 seq_printf(seq, "Result: %s\n", pkt_dev->result);
742 seq_printf(seq, "Result: Idle\n");
748 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
753 for (; i < maxlen; i++) {
756 if (get_user(c, &user_buffer[i]))
758 if ((c >= '0') && (c <= '9'))
760 else if ((c >= 'a') && (c <= 'f'))
761 *num |= c - 'a' + 10;
762 else if ((c >= 'A') && (c <= 'F'))
763 *num |= c - 'A' + 10;
770 static int count_trail_chars(const char __user * user_buffer,
775 for (i = 0; i < maxlen; i++) {
777 if (get_user(c, &user_buffer[i]))
795 static unsigned long num_arg(const char __user * user_buffer,
796 unsigned long maxlen, unsigned long *num)
801 for (; i < maxlen; i++) {
803 if (get_user(c, &user_buffer[i]))
805 if ((c >= '0') && (c <= '9')) {
814 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
818 for (; i < maxlen; i++) {
820 if (get_user(c, &user_buffer[i]))
838 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
845 pkt_dev->nr_labels = 0;
848 len = hex32_arg(&buffer[i], 8, &tmp);
851 pkt_dev->labels[n] = htonl(tmp);
852 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
853 pkt_dev->flags |= F_MPLS_RND;
855 if (get_user(c, &buffer[i]))
859 if (n >= MAX_MPLS_LABELS)
863 pkt_dev->nr_labels = n;
867 static ssize_t pktgen_if_write(struct file *file,
868 const char __user * user_buffer, size_t count,
871 struct seq_file *seq = (struct seq_file *)file->private_data;
872 struct pktgen_dev *pkt_dev = seq->private;
874 char name[16], valstr[32];
875 unsigned long value = 0;
876 char *pg_result = NULL;
880 pg_result = &(pkt_dev->result[0]);
883 printk("pktgen: wrong command format\n");
888 tmp = count_trail_chars(&user_buffer[i], max);
890 printk("pktgen: illegal format\n");
895 /* Read variable name */
897 len = strn_len(&user_buffer[i], sizeof(name) - 1);
901 memset(name, 0, sizeof(name));
902 if (copy_from_user(name, &user_buffer[i], len))
907 len = count_trail_chars(&user_buffer[i], max);
915 if (copy_from_user(tb, user_buffer, count))
918 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
919 (unsigned long)count, tb);
922 if (!strcmp(name, "min_pkt_size")) {
923 len = num_arg(&user_buffer[i], 10, &value);
928 if (value < 14 + 20 + 8)
930 if (value != pkt_dev->min_pkt_size) {
931 pkt_dev->min_pkt_size = value;
932 pkt_dev->cur_pkt_size = value;
934 sprintf(pg_result, "OK: min_pkt_size=%u",
935 pkt_dev->min_pkt_size);
939 if (!strcmp(name, "max_pkt_size")) {
940 len = num_arg(&user_buffer[i], 10, &value);
945 if (value < 14 + 20 + 8)
947 if (value != pkt_dev->max_pkt_size) {
948 pkt_dev->max_pkt_size = value;
949 pkt_dev->cur_pkt_size = value;
951 sprintf(pg_result, "OK: max_pkt_size=%u",
952 pkt_dev->max_pkt_size);
956 /* Shortcut for min = max */
958 if (!strcmp(name, "pkt_size")) {
959 len = num_arg(&user_buffer[i], 10, &value);
964 if (value < 14 + 20 + 8)
966 if (value != pkt_dev->min_pkt_size) {
967 pkt_dev->min_pkt_size = value;
968 pkt_dev->max_pkt_size = value;
969 pkt_dev->cur_pkt_size = value;
971 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
975 if (!strcmp(name, "debug")) {
976 len = num_arg(&user_buffer[i], 10, &value);
982 sprintf(pg_result, "OK: debug=%u", debug);
986 if (!strcmp(name, "frags")) {
987 len = num_arg(&user_buffer[i], 10, &value);
992 pkt_dev->nfrags = value;
993 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
996 if (!strcmp(name, "delay")) {
997 len = num_arg(&user_buffer[i], 10, &value);
1002 if (value == 0x7FFFFFFF) {
1003 pkt_dev->delay_us = 0x7FFFFFFF;
1004 pkt_dev->delay_ns = 0;
1006 pkt_dev->delay_us = value / 1000;
1007 pkt_dev->delay_ns = value % 1000;
1009 sprintf(pg_result, "OK: delay=%u",
1010 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1013 if (!strcmp(name, "udp_src_min")) {
1014 len = num_arg(&user_buffer[i], 10, &value);
1019 if (value != pkt_dev->udp_src_min) {
1020 pkt_dev->udp_src_min = value;
1021 pkt_dev->cur_udp_src = value;
1023 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1026 if (!strcmp(name, "udp_dst_min")) {
1027 len = num_arg(&user_buffer[i], 10, &value);
1032 if (value != pkt_dev->udp_dst_min) {
1033 pkt_dev->udp_dst_min = value;
1034 pkt_dev->cur_udp_dst = value;
1036 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1039 if (!strcmp(name, "udp_src_max")) {
1040 len = num_arg(&user_buffer[i], 10, &value);
1045 if (value != pkt_dev->udp_src_max) {
1046 pkt_dev->udp_src_max = value;
1047 pkt_dev->cur_udp_src = value;
1049 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1052 if (!strcmp(name, "udp_dst_max")) {
1053 len = num_arg(&user_buffer[i], 10, &value);
1058 if (value != pkt_dev->udp_dst_max) {
1059 pkt_dev->udp_dst_max = value;
1060 pkt_dev->cur_udp_dst = value;
1062 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1065 if (!strcmp(name, "clone_skb")) {
1066 len = num_arg(&user_buffer[i], 10, &value);
1071 pkt_dev->clone_skb = value;
1073 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1076 if (!strcmp(name, "count")) {
1077 len = num_arg(&user_buffer[i], 10, &value);
1082 pkt_dev->count = value;
1083 sprintf(pg_result, "OK: count=%llu",
1084 (unsigned long long)pkt_dev->count);
1087 if (!strcmp(name, "src_mac_count")) {
1088 len = num_arg(&user_buffer[i], 10, &value);
1093 if (pkt_dev->src_mac_count != value) {
1094 pkt_dev->src_mac_count = value;
1095 pkt_dev->cur_src_mac_offset = 0;
1097 sprintf(pg_result, "OK: src_mac_count=%d",
1098 pkt_dev->src_mac_count);
1101 if (!strcmp(name, "dst_mac_count")) {
1102 len = num_arg(&user_buffer[i], 10, &value);
1107 if (pkt_dev->dst_mac_count != value) {
1108 pkt_dev->dst_mac_count = value;
1109 pkt_dev->cur_dst_mac_offset = 0;
1111 sprintf(pg_result, "OK: dst_mac_count=%d",
1112 pkt_dev->dst_mac_count);
1115 if (!strcmp(name, "flag")) {
1118 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1122 if (copy_from_user(f, &user_buffer[i], len))
1125 if (strcmp(f, "IPSRC_RND") == 0)
1126 pkt_dev->flags |= F_IPSRC_RND;
1128 else if (strcmp(f, "!IPSRC_RND") == 0)
1129 pkt_dev->flags &= ~F_IPSRC_RND;
1131 else if (strcmp(f, "TXSIZE_RND") == 0)
1132 pkt_dev->flags |= F_TXSIZE_RND;
1134 else if (strcmp(f, "!TXSIZE_RND") == 0)
1135 pkt_dev->flags &= ~F_TXSIZE_RND;
1137 else if (strcmp(f, "IPDST_RND") == 0)
1138 pkt_dev->flags |= F_IPDST_RND;
1140 else if (strcmp(f, "!IPDST_RND") == 0)
1141 pkt_dev->flags &= ~F_IPDST_RND;
1143 else if (strcmp(f, "UDPSRC_RND") == 0)
1144 pkt_dev->flags |= F_UDPSRC_RND;
1146 else if (strcmp(f, "!UDPSRC_RND") == 0)
1147 pkt_dev->flags &= ~F_UDPSRC_RND;
1149 else if (strcmp(f, "UDPDST_RND") == 0)
1150 pkt_dev->flags |= F_UDPDST_RND;
1152 else if (strcmp(f, "!UDPDST_RND") == 0)
1153 pkt_dev->flags &= ~F_UDPDST_RND;
1155 else if (strcmp(f, "MACSRC_RND") == 0)
1156 pkt_dev->flags |= F_MACSRC_RND;
1158 else if (strcmp(f, "!MACSRC_RND") == 0)
1159 pkt_dev->flags &= ~F_MACSRC_RND;
1161 else if (strcmp(f, "MACDST_RND") == 0)
1162 pkt_dev->flags |= F_MACDST_RND;
1164 else if (strcmp(f, "!MACDST_RND") == 0)
1165 pkt_dev->flags &= ~F_MACDST_RND;
1167 else if (strcmp(f, "MPLS_RND") == 0)
1168 pkt_dev->flags |= F_MPLS_RND;
1170 else if (strcmp(f, "!MPLS_RND") == 0)
1171 pkt_dev->flags &= ~F_MPLS_RND;
1173 else if (strcmp(f, "VID_RND") == 0)
1174 pkt_dev->flags |= F_VID_RND;
1176 else if (strcmp(f, "!VID_RND") == 0)
1177 pkt_dev->flags &= ~F_VID_RND;
1179 else if (strcmp(f, "SVID_RND") == 0)
1180 pkt_dev->flags |= F_SVID_RND;
1182 else if (strcmp(f, "!SVID_RND") == 0)
1183 pkt_dev->flags &= ~F_SVID_RND;
1185 else if (strcmp(f, "!IPV6") == 0)
1186 pkt_dev->flags &= ~F_IPV6;
1190 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1192 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1193 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
1196 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1199 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1200 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1205 if (copy_from_user(buf, &user_buffer[i], len))
1208 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1209 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1210 strncpy(pkt_dev->dst_min, buf, len);
1211 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1212 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1215 printk("pktgen: dst_min set to: %s\n",
1218 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1221 if (!strcmp(name, "dst_max")) {
1222 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1227 if (copy_from_user(buf, &user_buffer[i], len))
1231 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1232 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1233 strncpy(pkt_dev->dst_max, buf, len);
1234 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1235 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1238 printk("pktgen: dst_max set to: %s\n",
1241 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1244 if (!strcmp(name, "dst6")) {
1245 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1249 pkt_dev->flags |= F_IPV6;
1251 if (copy_from_user(buf, &user_buffer[i], len))
1255 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1256 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1258 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1261 printk("pktgen: dst6 set to: %s\n", buf);
1264 sprintf(pg_result, "OK: dst6=%s", buf);
1267 if (!strcmp(name, "dst6_min")) {
1268 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1272 pkt_dev->flags |= F_IPV6;
1274 if (copy_from_user(buf, &user_buffer[i], len))
1278 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1279 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1281 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1282 &pkt_dev->min_in6_daddr);
1284 printk("pktgen: dst6_min set to: %s\n", buf);
1287 sprintf(pg_result, "OK: dst6_min=%s", buf);
1290 if (!strcmp(name, "dst6_max")) {
1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1295 pkt_dev->flags |= F_IPV6;
1297 if (copy_from_user(buf, &user_buffer[i], len))
1301 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1302 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1305 printk("pktgen: dst6_max set to: %s\n", buf);
1308 sprintf(pg_result, "OK: dst6_max=%s", buf);
1311 if (!strcmp(name, "src6")) {
1312 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1316 pkt_dev->flags |= F_IPV6;
1318 if (copy_from_user(buf, &user_buffer[i], len))
1322 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1323 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1325 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1328 printk("pktgen: src6 set to: %s\n", buf);
1331 sprintf(pg_result, "OK: src6=%s", buf);
1334 if (!strcmp(name, "src_min")) {
1335 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1339 if (copy_from_user(buf, &user_buffer[i], len))
1342 if (strcmp(buf, pkt_dev->src_min) != 0) {
1343 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1344 strncpy(pkt_dev->src_min, buf, len);
1345 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1346 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1349 printk("pktgen: src_min set to: %s\n",
1352 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1355 if (!strcmp(name, "src_max")) {
1356 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1360 if (copy_from_user(buf, &user_buffer[i], len))
1363 if (strcmp(buf, pkt_dev->src_max) != 0) {
1364 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1365 strncpy(pkt_dev->src_max, buf, len);
1366 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1367 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1370 printk("pktgen: src_max set to: %s\n",
1373 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1376 if (!strcmp(name, "dst_mac")) {
1378 unsigned char old_dmac[ETH_ALEN];
1379 unsigned char *m = pkt_dev->dst_mac;
1380 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1382 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1386 memset(valstr, 0, sizeof(valstr));
1387 if (copy_from_user(valstr, &user_buffer[i], len))
1391 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1392 if (*v >= '0' && *v <= '9') {
1396 if (*v >= 'A' && *v <= 'F') {
1398 *m += *v - 'A' + 10;
1400 if (*v >= 'a' && *v <= 'f') {
1402 *m += *v - 'a' + 10;
1410 /* Set up Dest MAC */
1411 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1412 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1414 sprintf(pg_result, "OK: dstmac");
1417 if (!strcmp(name, "src_mac")) {
1419 unsigned char *m = pkt_dev->src_mac;
1421 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1425 memset(valstr, 0, sizeof(valstr));
1426 if (copy_from_user(valstr, &user_buffer[i], len))
1430 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1431 if (*v >= '0' && *v <= '9') {
1435 if (*v >= 'A' && *v <= 'F') {
1437 *m += *v - 'A' + 10;
1439 if (*v >= 'a' && *v <= 'f') {
1441 *m += *v - 'a' + 10;
1449 sprintf(pg_result, "OK: srcmac");
1453 if (!strcmp(name, "clear_counters")) {
1454 pktgen_clear_counters(pkt_dev);
1455 sprintf(pg_result, "OK: Clearing counters.\n");
1459 if (!strcmp(name, "flows")) {
1460 len = num_arg(&user_buffer[i], 10, &value);
1465 if (value > MAX_CFLOWS)
1468 pkt_dev->cflows = value;
1469 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1473 if (!strcmp(name, "flowlen")) {
1474 len = num_arg(&user_buffer[i], 10, &value);
1479 pkt_dev->lflow = value;
1480 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1484 if (!strcmp(name, "mpls")) {
1486 len = get_labels(&user_buffer[i], pkt_dev);
1487 if (len < 0) { return len; }
1489 offset = sprintf(pg_result, "OK: mpls=");
1490 for (n = 0; n < pkt_dev->nr_labels; n++)
1491 offset += sprintf(pg_result + offset,
1492 "%08x%s", ntohl(pkt_dev->labels[n]),
1493 n == pkt_dev->nr_labels-1 ? "" : ",");
1495 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1496 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1497 pkt_dev->svlan_id = 0xffff;
1500 printk("pktgen: VLAN/SVLAN auto turned off\n");
1505 if (!strcmp(name, "vlan_id")) {
1506 len = num_arg(&user_buffer[i], 4, &value);
1511 if (value <= 4095) {
1512 pkt_dev->vlan_id = value; /* turn on VLAN */
1515 printk("pktgen: VLAN turned on\n");
1517 if (debug && pkt_dev->nr_labels)
1518 printk("pktgen: MPLS auto turned off\n");
1520 pkt_dev->nr_labels = 0; /* turn off MPLS */
1521 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1523 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1524 pkt_dev->svlan_id = 0xffff;
1527 printk("pktgen: VLAN/SVLAN turned off\n");
1532 if (!strcmp(name, "vlan_p")) {
1533 len = num_arg(&user_buffer[i], 1, &value);
1538 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1539 pkt_dev->vlan_p = value;
1540 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1542 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1547 if (!strcmp(name, "vlan_cfi")) {
1548 len = num_arg(&user_buffer[i], 1, &value);
1553 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1554 pkt_dev->vlan_cfi = value;
1555 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1557 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1562 if (!strcmp(name, "svlan_id")) {
1563 len = num_arg(&user_buffer[i], 4, &value);
1568 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1569 pkt_dev->svlan_id = value; /* turn on SVLAN */
1572 printk("pktgen: SVLAN turned on\n");
1574 if (debug && pkt_dev->nr_labels)
1575 printk("pktgen: MPLS auto turned off\n");
1577 pkt_dev->nr_labels = 0; /* turn off MPLS */
1578 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1580 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1581 pkt_dev->svlan_id = 0xffff;
1584 printk("pktgen: VLAN/SVLAN turned off\n");
1589 if (!strcmp(name, "svlan_p")) {
1590 len = num_arg(&user_buffer[i], 1, &value);
1595 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1596 pkt_dev->svlan_p = value;
1597 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1599 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1604 if (!strcmp(name, "svlan_cfi")) {
1605 len = num_arg(&user_buffer[i], 1, &value);
1610 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1611 pkt_dev->svlan_cfi = value;
1612 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1614 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1619 if (!strcmp(name, "tos")) {
1620 __u32 tmp_value = 0;
1621 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1627 pkt_dev->tos = tmp_value;
1628 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1630 sprintf(pg_result, "ERROR: tos must be 00-ff");
1635 if (!strcmp(name, "traffic_class")) {
1636 __u32 tmp_value = 0;
1637 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1643 pkt_dev->traffic_class = tmp_value;
1644 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1646 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1651 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1655 static int pktgen_if_open(struct inode *inode, struct file *file)
1657 return single_open(file, pktgen_if_show, PDE(inode)->data);
1660 static const struct file_operations pktgen_if_fops = {
1661 .owner = THIS_MODULE,
1662 .open = pktgen_if_open,
1664 .llseek = seq_lseek,
1665 .write = pktgen_if_write,
1666 .release = single_release,
1669 static int pktgen_thread_show(struct seq_file *seq, void *v)
1671 struct pktgen_thread *t = seq->private;
1672 struct pktgen_dev *pkt_dev;
1676 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1677 t->tsk->comm, t->max_before_softirq);
1679 seq_printf(seq, "Running: ");
1682 list_for_each_entry(pkt_dev, &t->if_list, list)
1683 if (pkt_dev->running)
1684 seq_printf(seq, "%s ", pkt_dev->odev->name);
1686 seq_printf(seq, "\nStopped: ");
1688 list_for_each_entry(pkt_dev, &t->if_list, list)
1689 if (!pkt_dev->running)
1690 seq_printf(seq, "%s ", pkt_dev->odev->name);
1693 seq_printf(seq, "\nResult: %s\n", t->result);
1695 seq_printf(seq, "\nResult: NA\n");
1702 static ssize_t pktgen_thread_write(struct file *file,
1703 const char __user * user_buffer,
1704 size_t count, loff_t * offset)
1706 struct seq_file *seq = (struct seq_file *)file->private_data;
1707 struct pktgen_thread *t = seq->private;
1708 int i = 0, max, len, ret;
1711 unsigned long value = 0;
1714 // sprintf(pg_result, "Wrong command format");
1719 len = count_trail_chars(&user_buffer[i], max);
1725 /* Read variable name */
1727 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1731 memset(name, 0, sizeof(name));
1732 if (copy_from_user(name, &user_buffer[i], len))
1737 len = count_trail_chars(&user_buffer[i], max);
1744 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1747 printk("pktgen: ERROR: No thread\n");
1752 pg_result = &(t->result[0]);
1754 if (!strcmp(name, "add_device")) {
1757 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1762 if (copy_from_user(f, &user_buffer[i], len))
1765 mutex_lock(&pktgen_thread_lock);
1766 pktgen_add_device(t, f);
1767 mutex_unlock(&pktgen_thread_lock);
1769 sprintf(pg_result, "OK: add_device=%s", f);
1773 if (!strcmp(name, "rem_device_all")) {
1774 mutex_lock(&pktgen_thread_lock);
1775 t->control |= T_REMDEVALL;
1776 mutex_unlock(&pktgen_thread_lock);
1777 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1779 sprintf(pg_result, "OK: rem_device_all");
1783 if (!strcmp(name, "max_before_softirq")) {
1784 len = num_arg(&user_buffer[i], 10, &value);
1785 mutex_lock(&pktgen_thread_lock);
1786 t->max_before_softirq = value;
1787 mutex_unlock(&pktgen_thread_lock);
1789 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1798 static int pktgen_thread_open(struct inode *inode, struct file *file)
1800 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1803 static const struct file_operations pktgen_thread_fops = {
1804 .owner = THIS_MODULE,
1805 .open = pktgen_thread_open,
1807 .llseek = seq_lseek,
1808 .write = pktgen_thread_write,
1809 .release = single_release,
1812 /* Think find or remove for NN */
1813 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1815 struct pktgen_thread *t;
1816 struct pktgen_dev *pkt_dev = NULL;
1818 list_for_each_entry(t, &pktgen_threads, th_list) {
1819 pkt_dev = pktgen_find_dev(t, ifname);
1823 pkt_dev->removal_mark = 1;
1824 t->control |= T_REMDEV;
1834 * mark a device for removal
1836 static void pktgen_mark_device(const char *ifname)
1838 struct pktgen_dev *pkt_dev = NULL;
1839 const int max_tries = 10, msec_per_try = 125;
1842 mutex_lock(&pktgen_thread_lock);
1843 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1847 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1848 if (pkt_dev == NULL)
1849 break; /* success */
1851 mutex_unlock(&pktgen_thread_lock);
1852 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1853 "to disappear....\n", ifname);
1854 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1855 mutex_lock(&pktgen_thread_lock);
1857 if (++i >= max_tries) {
1858 printk("pktgen_mark_device: timed out after waiting "
1859 "%d msec for device %s to be removed\n",
1860 msec_per_try * i, ifname);
1866 mutex_unlock(&pktgen_thread_lock);
1869 static void pktgen_change_name(struct net_device *dev)
1871 struct pktgen_thread *t;
1873 list_for_each_entry(t, &pktgen_threads, th_list) {
1874 struct pktgen_dev *pkt_dev;
1876 list_for_each_entry(pkt_dev, &t->if_list, list) {
1877 if (pkt_dev->odev != dev)
1880 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1882 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1884 if (!pkt_dev->entry)
1885 printk(KERN_ERR "pktgen: can't move proc "
1886 " entry for '%s'\n", dev->name);
1892 static int pktgen_device_event(struct notifier_block *unused,
1893 unsigned long event, void *ptr)
1895 struct net_device *dev = ptr;
1897 /* It is OK that we do not hold the group lock right now,
1898 * as we run under the RTNL lock.
1902 case NETDEV_CHANGENAME:
1903 pktgen_change_name(dev);
1906 case NETDEV_UNREGISTER:
1907 pktgen_mark_device(dev->name);
1914 /* Associate pktgen_dev with a device. */
1916 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1918 struct net_device *odev;
1921 /* Clean old setups */
1922 if (pkt_dev->odev) {
1923 dev_put(pkt_dev->odev);
1924 pkt_dev->odev = NULL;
1927 odev = dev_get_by_name(ifname);
1929 printk("pktgen: no such netdevice: \"%s\"\n", ifname);
1933 if (odev->type != ARPHRD_ETHER) {
1934 printk("pktgen: not an ethernet device: \"%s\"\n", ifname);
1936 } else if (!netif_running(odev)) {
1937 printk("pktgen: device is down: \"%s\"\n", ifname);
1940 pkt_dev->odev = odev;
1948 /* Read pkt_dev from the interface and set up internal pktgen_dev
1949 * structure to have the right information to create/send packets
1951 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1953 if (!pkt_dev->odev) {
1954 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1955 sprintf(pkt_dev->result,
1956 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1960 /* Default to the interface's mac if not explicitly set. */
1962 if (is_zero_ether_addr(pkt_dev->src_mac))
1963 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1965 /* Set up Dest MAC */
1966 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1968 /* Set up pkt size */
1969 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1971 if (pkt_dev->flags & F_IPV6) {
1973 * Skip this automatic address setting until locks or functions
1978 int i, set = 0, err = 1;
1979 struct inet6_dev *idev;
1981 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1982 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1990 * Use linklevel address if unconfigured.
1992 * use ipv6_get_lladdr if/when it's get exported
1996 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1997 struct inet6_ifaddr *ifp;
1999 read_lock_bh(&idev->lock);
2000 for (ifp = idev->addr_list; ifp;
2001 ifp = ifp->if_next) {
2002 if (ifp->scope == IFA_LINK
2004 flags & IFA_F_TENTATIVE)) {
2005 ipv6_addr_copy(&pkt_dev->
2012 read_unlock_bh(&idev->lock);
2016 printk("pktgen: ERROR: IPv6 link address not availble.\n");
2020 pkt_dev->saddr_min = 0;
2021 pkt_dev->saddr_max = 0;
2022 if (strlen(pkt_dev->src_min) == 0) {
2024 struct in_device *in_dev;
2027 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2029 if (in_dev->ifa_list) {
2030 pkt_dev->saddr_min =
2031 in_dev->ifa_list->ifa_address;
2032 pkt_dev->saddr_max = pkt_dev->saddr_min;
2037 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2038 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2041 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2042 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2044 /* Initialize current values. */
2045 pkt_dev->cur_dst_mac_offset = 0;
2046 pkt_dev->cur_src_mac_offset = 0;
2047 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2048 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2049 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2050 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2051 pkt_dev->nflows = 0;
2054 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2059 start = now = getCurUs();
2060 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2061 while (now < spin_until_us) {
2062 /* TODO: optimize sleeping behavior */
2063 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2064 schedule_timeout_interruptible(1);
2065 else if (spin_until_us - now > 100) {
2067 if (!pkt_dev->running)
2076 pkt_dev->idle_acc += now - start;
2079 /* Increment/randomize headers according to flags and current values
2080 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2082 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2088 if (pkt_dev->cflows) {
2089 flow = random32() % pkt_dev->cflows;
2091 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2092 pkt_dev->flows[flow].count = 0;
2095 /* Deal with source MAC */
2096 if (pkt_dev->src_mac_count > 1) {
2100 if (pkt_dev->flags & F_MACSRC_RND)
2101 mc = random32() % pkt_dev->src_mac_count;
2103 mc = pkt_dev->cur_src_mac_offset++;
2104 if (pkt_dev->cur_src_mac_offset >
2105 pkt_dev->src_mac_count)
2106 pkt_dev->cur_src_mac_offset = 0;
2109 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2110 pkt_dev->hh[11] = tmp;
2111 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2112 pkt_dev->hh[10] = tmp;
2113 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2114 pkt_dev->hh[9] = tmp;
2115 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2116 pkt_dev->hh[8] = tmp;
2117 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2118 pkt_dev->hh[7] = tmp;
2121 /* Deal with Destination MAC */
2122 if (pkt_dev->dst_mac_count > 1) {
2126 if (pkt_dev->flags & F_MACDST_RND)
2127 mc = random32() % pkt_dev->dst_mac_count;
2130 mc = pkt_dev->cur_dst_mac_offset++;
2131 if (pkt_dev->cur_dst_mac_offset >
2132 pkt_dev->dst_mac_count) {
2133 pkt_dev->cur_dst_mac_offset = 0;
2137 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2138 pkt_dev->hh[5] = tmp;
2139 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2140 pkt_dev->hh[4] = tmp;
2141 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2142 pkt_dev->hh[3] = tmp;
2143 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2144 pkt_dev->hh[2] = tmp;
2145 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2146 pkt_dev->hh[1] = tmp;
2149 if (pkt_dev->flags & F_MPLS_RND) {
2151 for (i = 0; i < pkt_dev->nr_labels; i++)
2152 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2153 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2154 ((__force __be32)random32() &
2158 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2159 pkt_dev->vlan_id = random32() & (4096-1);
2162 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2163 pkt_dev->svlan_id = random32() & (4096 - 1);
2166 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2167 if (pkt_dev->flags & F_UDPSRC_RND)
2168 pkt_dev->cur_udp_src = random32() %
2169 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2170 + pkt_dev->udp_src_min;
2173 pkt_dev->cur_udp_src++;
2174 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2175 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2179 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2180 if (pkt_dev->flags & F_UDPDST_RND) {
2181 pkt_dev->cur_udp_dst = random32() %
2182 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2183 + pkt_dev->udp_dst_min;
2185 pkt_dev->cur_udp_dst++;
2186 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2187 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2191 if (!(pkt_dev->flags & F_IPV6)) {
2193 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2197 if (pkt_dev->flags & F_IPSRC_RND)
2198 t = random32() % (imx - imn) + imn;
2200 t = ntohl(pkt_dev->cur_saddr);
2206 pkt_dev->cur_saddr = htonl(t);
2209 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
2210 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2212 imn = ntohl(pkt_dev->daddr_min);
2213 imx = ntohl(pkt_dev->daddr_max);
2217 if (pkt_dev->flags & F_IPDST_RND) {
2219 t = random32() % (imx - imn) + imn;
2222 while (LOOPBACK(s) || MULTICAST(s)
2223 || BADCLASS(s) || ZERONET(s)
2224 || LOCAL_MCAST(s)) {
2225 t = random32() % (imx - imn) + imn;
2228 pkt_dev->cur_daddr = s;
2230 t = ntohl(pkt_dev->cur_daddr);
2235 pkt_dev->cur_daddr = htonl(t);
2238 if (pkt_dev->cflows) {
2239 pkt_dev->flows[flow].cur_daddr =
2244 } else { /* IPV6 * */
2246 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2247 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2248 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2249 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2253 /* Only random destinations yet */
2255 for (i = 0; i < 4; i++) {
2256 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2257 (((__force __be32)random32() |
2258 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2259 pkt_dev->max_in6_daddr.s6_addr32[i]);
2264 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2266 if (pkt_dev->flags & F_TXSIZE_RND) {
2268 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2269 + pkt_dev->min_pkt_size;
2271 t = pkt_dev->cur_pkt_size + 1;
2272 if (t > pkt_dev->max_pkt_size)
2273 t = pkt_dev->min_pkt_size;
2275 pkt_dev->cur_pkt_size = t;
2278 pkt_dev->flows[flow].count++;
2281 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2284 for (i = 0; i < pkt_dev->nr_labels; i++) {
2285 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2288 *mpls |= MPLS_STACK_BOTTOM;
2291 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2294 return htons(id | (cfi << 12) | (prio << 13));
2297 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2298 struct pktgen_dev *pkt_dev)
2300 struct sk_buff *skb = NULL;
2302 struct udphdr *udph;
2305 struct pktgen_hdr *pgh = NULL;
2306 __be16 protocol = htons(ETH_P_IP);
2308 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2309 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2310 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2311 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2314 if (pkt_dev->nr_labels)
2315 protocol = htons(ETH_P_MPLS_UC);
2317 if (pkt_dev->vlan_id != 0xffff)
2318 protocol = htons(ETH_P_8021Q);
2320 /* Update any of the values, used when we're incrementing various
2323 mod_cur_headers(pkt_dev);
2325 datalen = (odev->hard_header_len + 16) & ~0xf;
2326 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2327 pkt_dev->nr_labels*sizeof(u32) +
2328 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2331 sprintf(pkt_dev->result, "No memory");
2335 skb_reserve(skb, datalen);
2337 /* Reserve for ethernet and IP header */
2338 eth = (__u8 *) skb_push(skb, 14);
2339 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2340 if (pkt_dev->nr_labels)
2341 mpls_push(mpls, pkt_dev);
2343 if (pkt_dev->vlan_id != 0xffff) {
2344 if (pkt_dev->svlan_id != 0xffff) {
2345 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2346 *svlan_tci = build_tci(pkt_dev->svlan_id,
2349 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2350 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2352 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2353 *vlan_tci = build_tci(pkt_dev->vlan_id,
2356 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2357 *vlan_encapsulated_proto = htons(ETH_P_IP);
2360 skb->network_header = skb->tail;
2361 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2362 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2365 udph = udp_hdr(skb);
2367 memcpy(eth, pkt_dev->hh, 12);
2368 *(__be16 *) & eth[12] = protocol;
2370 /* Eth + IPh + UDPh + mpls */
2371 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2372 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2373 if (datalen < sizeof(struct pktgen_hdr))
2374 datalen = sizeof(struct pktgen_hdr);
2376 udph->source = htons(pkt_dev->cur_udp_src);
2377 udph->dest = htons(pkt_dev->cur_udp_dst);
2378 udph->len = htons(datalen + 8); /* DATA + udphdr */
2379 udph->check = 0; /* No checksum */
2384 iph->tos = pkt_dev->tos;
2385 iph->protocol = IPPROTO_UDP; /* UDP */
2386 iph->saddr = pkt_dev->cur_saddr;
2387 iph->daddr = pkt_dev->cur_daddr;
2389 iplen = 20 + 8 + datalen;
2390 iph->tot_len = htons(iplen);
2392 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2393 skb->protocol = protocol;
2394 skb->mac_header = (skb->network_header - ETH_HLEN -
2395 pkt_dev->nr_labels * sizeof(u32) -
2396 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev));
2398 skb->pkt_type = PACKET_HOST;
2400 if (pkt_dev->nfrags <= 0)
2401 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2403 int frags = pkt_dev->nfrags;
2406 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2408 if (frags > MAX_SKB_FRAGS)
2409 frags = MAX_SKB_FRAGS;
2410 if (datalen > frags * PAGE_SIZE) {
2411 skb_put(skb, datalen - frags * PAGE_SIZE);
2412 datalen = frags * PAGE_SIZE;
2416 while (datalen > 0) {
2417 struct page *page = alloc_pages(GFP_KERNEL, 0);
2418 skb_shinfo(skb)->frags[i].page = page;
2419 skb_shinfo(skb)->frags[i].page_offset = 0;
2420 skb_shinfo(skb)->frags[i].size =
2421 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2422 datalen -= skb_shinfo(skb)->frags[i].size;
2423 skb->len += skb_shinfo(skb)->frags[i].size;
2424 skb->data_len += skb_shinfo(skb)->frags[i].size;
2426 skb_shinfo(skb)->nr_frags = i;
2435 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2439 skb_shinfo(skb)->frags[i - 1].size -= rem;
2441 skb_shinfo(skb)->frags[i] =
2442 skb_shinfo(skb)->frags[i - 1];
2443 get_page(skb_shinfo(skb)->frags[i].page);
2444 skb_shinfo(skb)->frags[i].page =
2445 skb_shinfo(skb)->frags[i - 1].page;
2446 skb_shinfo(skb)->frags[i].page_offset +=
2447 skb_shinfo(skb)->frags[i - 1].size;
2448 skb_shinfo(skb)->frags[i].size = rem;
2450 skb_shinfo(skb)->nr_frags = i;
2454 /* Stamp the time, and sequence number, convert them to network byte order */
2457 struct timeval timestamp;
2459 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2460 pgh->seq_num = htonl(pkt_dev->seq_num);
2462 do_gettimeofday(×tamp);
2463 pgh->tv_sec = htonl(timestamp.tv_sec);
2464 pgh->tv_usec = htonl(timestamp.tv_usec);
2471 * scan_ip6, fmt_ip taken from dietlibc-0.21
2472 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2474 * Slightly modified for kernel.
2475 * Should be candidate for net/ipv4/utils.c
2479 static unsigned int scan_ip6(const char *s, char ip[16])
2482 unsigned int len = 0;
2485 unsigned int prefixlen = 0;
2486 unsigned int suffixlen = 0;
2489 for (i = 0; i < 16; i++)
2495 if (s[1] == ':') { /* Found "::", skip to part 2 */
2504 u = simple_strtoul(s, &tmp, 16);
2510 if (prefixlen == 12 && s[i] == '.') {
2512 /* the last 4 bytes may be written as IPv4 address */
2515 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2518 ip[prefixlen++] = (u >> 8);
2519 ip[prefixlen++] = (u & 255);
2522 if (prefixlen == 16)
2526 /* part 2, after "::" */
2533 } else if (suffixlen != 0)
2537 u = simple_strtol(s, &tmp, 16);
2545 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2547 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2553 suffix[suffixlen++] = (u >> 8);
2554 suffix[suffixlen++] = (u & 255);
2557 if (prefixlen + suffixlen == 16)
2560 for (i = 0; i < suffixlen; i++)
2561 ip[16 - suffixlen + i] = suffix[i];
2565 static char tohex(char hexdigit)
2567 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2570 static int fmt_xlong(char *s, unsigned int i)
2573 *s = tohex((i >> 12) & 0xf);
2574 if (s != bak || *s != '0')
2576 *s = tohex((i >> 8) & 0xf);
2577 if (s != bak || *s != '0')
2579 *s = tohex((i >> 4) & 0xf);
2580 if (s != bak || *s != '0')
2582 *s = tohex(i & 0xf);
2586 static unsigned int fmt_ip6(char *s, const char ip[16])
2591 unsigned int compressing;
2596 for (j = 0; j < 16; j += 2) {
2598 #ifdef V4MAPPEDPREFIX
2599 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2600 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2605 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2606 (unsigned long)(unsigned char)ip[j + 1];
2621 i = fmt_xlong(s, temp);
2638 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2639 struct pktgen_dev *pkt_dev)
2641 struct sk_buff *skb = NULL;
2643 struct udphdr *udph;
2645 struct ipv6hdr *iph;
2646 struct pktgen_hdr *pgh = NULL;
2647 __be16 protocol = htons(ETH_P_IPV6);
2649 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2650 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2651 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2652 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2654 if (pkt_dev->nr_labels)
2655 protocol = htons(ETH_P_MPLS_UC);
2657 if (pkt_dev->vlan_id != 0xffff)
2658 protocol = htons(ETH_P_8021Q);
2660 /* Update any of the values, used when we're incrementing various
2663 mod_cur_headers(pkt_dev);
2665 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2666 pkt_dev->nr_labels*sizeof(u32) +
2667 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2670 sprintf(pkt_dev->result, "No memory");
2674 skb_reserve(skb, 16);
2676 /* Reserve for ethernet and IP header */
2677 eth = (__u8 *) skb_push(skb, 14);
2678 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2679 if (pkt_dev->nr_labels)
2680 mpls_push(mpls, pkt_dev);
2682 if (pkt_dev->vlan_id != 0xffff) {
2683 if (pkt_dev->svlan_id != 0xffff) {
2684 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2685 *svlan_tci = build_tci(pkt_dev->svlan_id,
2688 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2689 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2691 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2692 *vlan_tci = build_tci(pkt_dev->vlan_id,
2695 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2696 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2699 skb->network_header = skb->tail;
2700 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2701 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2703 iph = ipv6_hdr(skb);
2704 udph = udp_hdr(skb);
2706 memcpy(eth, pkt_dev->hh, 12);
2707 *(__be16 *) & eth[12] = protocol;
2709 /* Eth + IPh + UDPh + mpls */
2710 datalen = pkt_dev->cur_pkt_size - 14 -
2711 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2712 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2714 if (datalen < sizeof(struct pktgen_hdr)) {
2715 datalen = sizeof(struct pktgen_hdr);
2716 if (net_ratelimit())
2717 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2721 udph->source = htons(pkt_dev->cur_udp_src);
2722 udph->dest = htons(pkt_dev->cur_udp_dst);
2723 udph->len = htons(datalen + sizeof(struct udphdr));
2724 udph->check = 0; /* No checksum */
2726 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2728 if (pkt_dev->traffic_class) {
2729 /* Version + traffic class + flow (0) */
2730 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2733 iph->hop_limit = 32;
2735 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2736 iph->nexthdr = IPPROTO_UDP;
2738 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2739 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2741 skb->mac_header = (skb->network_header - ETH_HLEN -
2742 pkt_dev->nr_labels * sizeof(u32) -
2743 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev));
2744 skb->protocol = protocol;
2746 skb->pkt_type = PACKET_HOST;
2748 if (pkt_dev->nfrags <= 0)
2749 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2751 int frags = pkt_dev->nfrags;
2754 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2756 if (frags > MAX_SKB_FRAGS)
2757 frags = MAX_SKB_FRAGS;
2758 if (datalen > frags * PAGE_SIZE) {
2759 skb_put(skb, datalen - frags * PAGE_SIZE);
2760 datalen = frags * PAGE_SIZE;
2764 while (datalen > 0) {
2765 struct page *page = alloc_pages(GFP_KERNEL, 0);
2766 skb_shinfo(skb)->frags[i].page = page;
2767 skb_shinfo(skb)->frags[i].page_offset = 0;
2768 skb_shinfo(skb)->frags[i].size =
2769 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2770 datalen -= skb_shinfo(skb)->frags[i].size;
2771 skb->len += skb_shinfo(skb)->frags[i].size;
2772 skb->data_len += skb_shinfo(skb)->frags[i].size;
2774 skb_shinfo(skb)->nr_frags = i;
2783 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2787 skb_shinfo(skb)->frags[i - 1].size -= rem;
2789 skb_shinfo(skb)->frags[i] =
2790 skb_shinfo(skb)->frags[i - 1];
2791 get_page(skb_shinfo(skb)->frags[i].page);
2792 skb_shinfo(skb)->frags[i].page =
2793 skb_shinfo(skb)->frags[i - 1].page;
2794 skb_shinfo(skb)->frags[i].page_offset +=
2795 skb_shinfo(skb)->frags[i - 1].size;
2796 skb_shinfo(skb)->frags[i].size = rem;
2798 skb_shinfo(skb)->nr_frags = i;
2802 /* Stamp the time, and sequence number, convert them to network byte order */
2803 /* should we update cloned packets too ? */
2805 struct timeval timestamp;
2807 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2808 pgh->seq_num = htonl(pkt_dev->seq_num);
2810 do_gettimeofday(×tamp);
2811 pgh->tv_sec = htonl(timestamp.tv_sec);
2812 pgh->tv_usec = htonl(timestamp.tv_usec);
2814 /* pkt_dev->seq_num++; FF: you really mean this? */
2819 static inline struct sk_buff *fill_packet(struct net_device *odev,
2820 struct pktgen_dev *pkt_dev)
2822 if (pkt_dev->flags & F_IPV6)
2823 return fill_packet_ipv6(odev, pkt_dev);
2825 return fill_packet_ipv4(odev, pkt_dev);
2828 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2830 pkt_dev->seq_num = 1;
2831 pkt_dev->idle_acc = 0;
2833 pkt_dev->tx_bytes = 0;
2834 pkt_dev->errors = 0;
2837 /* Set up structure for sending pkts, clear counters */
2839 static void pktgen_run(struct pktgen_thread *t)
2841 struct pktgen_dev *pkt_dev;
2844 pr_debug("pktgen: entering pktgen_run. %p\n", t);
2847 list_for_each_entry(pkt_dev, &t->if_list, list) {
2850 * setup odev and create initial packet.
2852 pktgen_setup_inject(pkt_dev);
2854 if (pkt_dev->odev) {
2855 pktgen_clear_counters(pkt_dev);
2856 pkt_dev->running = 1; /* Cranke yeself! */
2857 pkt_dev->skb = NULL;
2858 pkt_dev->started_at = getCurUs();
2859 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2860 pkt_dev->next_tx_ns = 0;
2862 strcpy(pkt_dev->result, "Starting");
2865 strcpy(pkt_dev->result, "Error starting");
2869 t->control &= ~(T_STOP);
2872 static void pktgen_stop_all_threads_ifs(void)
2874 struct pktgen_thread *t;
2876 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
2878 mutex_lock(&pktgen_thread_lock);
2880 list_for_each_entry(t, &pktgen_threads, th_list)
2881 t->control |= T_STOP;
2883 mutex_unlock(&pktgen_thread_lock);
2886 static int thread_is_running(struct pktgen_thread *t)
2888 struct pktgen_dev *pkt_dev;
2891 list_for_each_entry(pkt_dev, &t->if_list, list)
2892 if (pkt_dev->running) {
2899 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2903 while (thread_is_running(t)) {
2907 msleep_interruptible(100);
2909 if (signal_pending(current))
2919 static int pktgen_wait_all_threads_run(void)
2921 struct pktgen_thread *t;
2924 mutex_lock(&pktgen_thread_lock);
2926 list_for_each_entry(t, &pktgen_threads, th_list) {
2927 sig = pktgen_wait_thread_run(t);
2933 list_for_each_entry(t, &pktgen_threads, th_list)
2934 t->control |= (T_STOP);
2936 mutex_unlock(&pktgen_thread_lock);
2940 static void pktgen_run_all_threads(void)
2942 struct pktgen_thread *t;
2944 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
2946 mutex_lock(&pktgen_thread_lock);
2948 list_for_each_entry(t, &pktgen_threads, th_list)
2949 t->control |= (T_RUN);
2951 mutex_unlock(&pktgen_thread_lock);
2953 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2955 pktgen_wait_all_threads_run();
2958 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2960 __u64 total_us, bps, mbps, pps, idle;
2961 char *p = pkt_dev->result;
2963 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2965 idle = pkt_dev->idle_acc;
2967 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2968 (unsigned long long)total_us,
2969 (unsigned long long)(total_us - idle),
2970 (unsigned long long)idle,
2971 (unsigned long long)pkt_dev->sofar,
2972 pkt_dev->cur_pkt_size, nr_frags);
2974 pps = pkt_dev->sofar * USEC_PER_SEC;
2976 while ((total_us >> 32) != 0) {
2981 do_div(pps, total_us);
2983 bps = pps * 8 * pkt_dev->cur_pkt_size;
2986 do_div(mbps, 1000000);
2987 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2988 (unsigned long long)pps,
2989 (unsigned long long)mbps,
2990 (unsigned long long)bps,
2991 (unsigned long long)pkt_dev->errors);
2994 /* Set stopped-at timer, remove from running list, do counters & statistics */
2996 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2998 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3000 if (!pkt_dev->running) {
3001 printk("pktgen: interface: %s is already stopped\n",
3002 pkt_dev->odev->name);
3006 pkt_dev->stopped_at = getCurUs();
3007 pkt_dev->running = 0;
3009 show_results(pkt_dev, nr_frags);
3014 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3016 struct pktgen_dev *pkt_dev, *best = NULL;
3020 list_for_each_entry(pkt_dev, &t->if_list, list) {
3021 if (!pkt_dev->running)
3025 else if (pkt_dev->next_tx_us < best->next_tx_us)
3032 static void pktgen_stop(struct pktgen_thread *t)
3034 struct pktgen_dev *pkt_dev;
3036 pr_debug("pktgen: entering pktgen_stop\n");
3040 list_for_each_entry(pkt_dev, &t->if_list, list) {
3041 pktgen_stop_device(pkt_dev);
3043 kfree_skb(pkt_dev->skb);
3045 pkt_dev->skb = NULL;
3052 * one of our devices needs to be removed - find it
3055 static void pktgen_rem_one_if(struct pktgen_thread *t)
3057 struct list_head *q, *n;
3058 struct pktgen_dev *cur;
3060 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3064 list_for_each_safe(q, n, &t->if_list) {
3065 cur = list_entry(q, struct pktgen_dev, list);
3067 if (!cur->removal_mark)
3071 kfree_skb(cur->skb);
3074 pktgen_remove_device(t, cur);
3082 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3084 struct list_head *q, *n;
3085 struct pktgen_dev *cur;
3087 /* Remove all devices, free mem */
3089 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3092 list_for_each_safe(q, n, &t->if_list) {
3093 cur = list_entry(q, struct pktgen_dev, list);
3096 kfree_skb(cur->skb);
3099 pktgen_remove_device(t, cur);
3105 static void pktgen_rem_thread(struct pktgen_thread *t)
3107 /* Remove from the thread list */
3109 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3111 mutex_lock(&pktgen_thread_lock);
3113 list_del(&t->th_list);
3115 mutex_unlock(&pktgen_thread_lock);
3118 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3120 struct net_device *odev = NULL;
3121 __u64 idle_start = 0;
3124 odev = pkt_dev->odev;
3126 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3130 if (now < pkt_dev->next_tx_us)
3131 spin(pkt_dev, pkt_dev->next_tx_us);
3133 /* This is max DELAY, this has special meaning of
3136 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3137 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3138 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3143 if (netif_queue_stopped(odev) || need_resched()) {
3144 idle_start = getCurUs();
3146 if (!netif_running(odev)) {
3147 pktgen_stop_device(pkt_dev);
3149 kfree_skb(pkt_dev->skb);
3150 pkt_dev->skb = NULL;
3156 pkt_dev->idle_acc += getCurUs() - idle_start;
3158 if (netif_queue_stopped(odev)) {
3159 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3160 pkt_dev->next_tx_ns = 0;
3161 goto out; /* Try the next interface */
3165 if (pkt_dev->last_ok || !pkt_dev->skb) {
3166 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3167 || (!pkt_dev->skb)) {
3168 /* build a new pkt */
3170 kfree_skb(pkt_dev->skb);
3172 pkt_dev->skb = fill_packet(odev, pkt_dev);
3173 if (pkt_dev->skb == NULL) {
3174 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
3176 pkt_dev->clone_count--; /* back out increment, OOM */
3179 pkt_dev->allocated_skbs++;
3180 pkt_dev->clone_count = 0; /* reset counter */
3184 netif_tx_lock_bh(odev);
3185 if (!netif_queue_stopped(odev)) {
3187 atomic_inc(&(pkt_dev->skb->users));
3189 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3190 if (likely(ret == NETDEV_TX_OK)) {
3191 pkt_dev->last_ok = 1;
3194 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3196 } else if (ret == NETDEV_TX_LOCKED
3197 && (odev->features & NETIF_F_LLTX)) {
3200 } else { /* Retry it next time */
3202 atomic_dec(&(pkt_dev->skb->users));
3204 if (debug && net_ratelimit())
3205 printk(KERN_INFO "pktgen: Hard xmit error\n");
3208 pkt_dev->last_ok = 0;
3211 pkt_dev->next_tx_us = getCurUs();
3212 pkt_dev->next_tx_ns = 0;
3214 pkt_dev->next_tx_us += pkt_dev->delay_us;
3215 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3217 if (pkt_dev->next_tx_ns > 1000) {
3218 pkt_dev->next_tx_us++;
3219 pkt_dev->next_tx_ns -= 1000;
3223 else { /* Retry it next time */
3224 pkt_dev->last_ok = 0;
3225 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3226 pkt_dev->next_tx_ns = 0;
3229 netif_tx_unlock_bh(odev);
3231 /* If pkt_dev->count is zero, then run forever */
3232 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3233 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3234 idle_start = getCurUs();
3235 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3236 if (signal_pending(current)) {
3241 pkt_dev->idle_acc += getCurUs() - idle_start;
3244 /* Done with this */
3245 pktgen_stop_device(pkt_dev);
3247 kfree_skb(pkt_dev->skb);
3248 pkt_dev->skb = NULL;
3254 * Main loop of the thread goes here
3257 static int pktgen_thread_worker(void *arg)
3260 struct pktgen_thread *t = arg;
3261 struct pktgen_dev *pkt_dev = NULL;
3263 u32 max_before_softirq;
3264 u32 tx_since_softirq = 0;
3266 BUG_ON(smp_processor_id() != cpu);
3268 init_waitqueue_head(&t->queue);
3270 t->pid = current->pid;
3272 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid);
3274 max_before_softirq = t->max_before_softirq;
3276 set_current_state(TASK_INTERRUPTIBLE);
3278 while (!kthread_should_stop()) {
3279 pkt_dev = next_to_run(t);
3282 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3284 prepare_to_wait(&(t->queue), &wait,
3285 TASK_INTERRUPTIBLE);
3286 schedule_timeout(HZ / 10);
3287 finish_wait(&(t->queue), &wait);
3290 __set_current_state(TASK_RUNNING);
3294 pktgen_xmit(pkt_dev);
3297 * We like to stay RUNNING but must also give
3298 * others fair share.
3301 tx_since_softirq += pkt_dev->last_ok;
3303 if (tx_since_softirq > max_before_softirq) {
3304 if (local_softirq_pending())
3306 tx_since_softirq = 0;
3310 if (t->control & T_STOP) {
3312 t->control &= ~(T_STOP);
3315 if (t->control & T_RUN) {
3317 t->control &= ~(T_RUN);
3320 if (t->control & T_REMDEVALL) {
3321 pktgen_rem_all_ifs(t);
3322 t->control &= ~(T_REMDEVALL);
3325 if (t->control & T_REMDEV) {
3326 pktgen_rem_one_if(t);
3327 t->control &= ~(T_REMDEV);
3332 set_current_state(TASK_INTERRUPTIBLE);
3335 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3338 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3339 pktgen_rem_all_ifs(t);
3341 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3342 pktgen_rem_thread(t);
3347 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3350 struct pktgen_dev *p, *pkt_dev = NULL;
3353 list_for_each_entry(p, &t->if_list, list)
3354 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3360 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3365 * Adds a dev at front of if_list.
3368 static int add_dev_to_thread(struct pktgen_thread *t,
3369 struct pktgen_dev *pkt_dev)
3375 if (pkt_dev->pg_thread) {
3376 printk("pktgen: ERROR: already assigned to a thread.\n");
3381 list_add(&pkt_dev->list, &t->if_list);
3382 pkt_dev->pg_thread = t;
3383 pkt_dev->running = 0;
3390 /* Called under thread lock */
3392 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3394 struct pktgen_dev *pkt_dev;
3397 /* We don't allow a device to be on several threads */
3399 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3401 printk("pktgen: ERROR: interface already used.\n");
3405 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3409 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3410 if (pkt_dev->flows == NULL) {
3414 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3416 pkt_dev->removal_mark = 0;
3417 pkt_dev->min_pkt_size = ETH_ZLEN;
3418 pkt_dev->max_pkt_size = ETH_ZLEN;
3419 pkt_dev->nfrags = 0;
3420 pkt_dev->clone_skb = pg_clone_skb_d;
3421 pkt_dev->delay_us = pg_delay_d / 1000;
3422 pkt_dev->delay_ns = pg_delay_d % 1000;
3423 pkt_dev->count = pg_count_d;
3425 pkt_dev->udp_src_min = 9; /* sink port */
3426 pkt_dev->udp_src_max = 9;
3427 pkt_dev->udp_dst_min = 9;
3428 pkt_dev->udp_dst_max = 9;
3430 pkt_dev->vlan_p = 0;
3431 pkt_dev->vlan_cfi = 0;
3432 pkt_dev->vlan_id = 0xffff;
3433 pkt_dev->svlan_p = 0;
3434 pkt_dev->svlan_cfi = 0;
3435 pkt_dev->svlan_id = 0xffff;
3437 err = pktgen_setup_dev(pkt_dev, ifname);
3441 pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir);
3442 if (!pkt_dev->entry) {
3443 printk("pktgen: cannot create %s/%s procfs entry.\n",
3444 PG_PROC_DIR, ifname);
3448 pkt_dev->entry->proc_fops = &pktgen_if_fops;
3449 pkt_dev->entry->data = pkt_dev;
3451 return add_dev_to_thread(t, pkt_dev);
3453 dev_put(pkt_dev->odev);
3456 vfree(pkt_dev->flows);
3461 static int __init pktgen_create_thread(int cpu)
3463 struct pktgen_thread *t;
3464 struct proc_dir_entry *pe;
3465 struct task_struct *p;
3467 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3469 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3473 spin_lock_init(&t->if_lock);
3476 INIT_LIST_HEAD(&t->if_list);
3478 list_add_tail(&t->th_list, &pktgen_threads);
3480 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3482 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3483 list_del(&t->th_list);
3487 kthread_bind(p, cpu);
3490 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3492 printk("pktgen: cannot create %s/%s procfs entry.\n",
3493 PG_PROC_DIR, t->tsk->comm);
3495 list_del(&t->th_list);
3500 pe->proc_fops = &pktgen_thread_fops;
3509 * Removes a device from the thread if_list.
3511 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3512 struct pktgen_dev *pkt_dev)
3514 struct list_head *q, *n;
3515 struct pktgen_dev *p;
3517 list_for_each_safe(q, n, &t->if_list) {
3518 p = list_entry(q, struct pktgen_dev, list);
3524 static int pktgen_remove_device(struct pktgen_thread *t,
3525 struct pktgen_dev *pkt_dev)
3528 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3530 if (pkt_dev->running) {
3531 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3532 pktgen_stop_device(pkt_dev);
3535 /* Dis-associate from the interface */
3537 if (pkt_dev->odev) {
3538 dev_put(pkt_dev->odev);
3539 pkt_dev->odev = NULL;
3542 /* And update the thread if_list */
3544 _rem_dev_from_if_list(t, pkt_dev);
3547 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3550 vfree(pkt_dev->flows);
3555 static int __init pg_init(void)
3558 struct proc_dir_entry *pe;
3562 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3565 pg_proc_dir->owner = THIS_MODULE;
3567 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3569 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3571 proc_net_remove(PG_PROC_DIR);
3575 pe->proc_fops = &pktgen_fops;
3578 /* Register us to receive netdevice events */
3579 register_netdevice_notifier(&pktgen_notifier_block);
3581 for_each_online_cpu(cpu) {
3584 err = pktgen_create_thread(cpu);
3586 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3590 if (list_empty(&pktgen_threads)) {
3591 printk("pktgen: ERROR: Initialization failed for all threads\n");
3592 unregister_netdevice_notifier(&pktgen_notifier_block);
3593 remove_proc_entry(PGCTRL, pg_proc_dir);
3594 proc_net_remove(PG_PROC_DIR);
3601 static void __exit pg_cleanup(void)
3603 struct pktgen_thread *t;
3604 struct list_head *q, *n;
3605 wait_queue_head_t queue;
3606 init_waitqueue_head(&queue);
3608 /* Stop all interfaces & threads */
3610 list_for_each_safe(q, n, &pktgen_threads) {
3611 t = list_entry(q, struct pktgen_thread, th_list);
3612 kthread_stop(t->tsk);
3616 /* Un-register us from receiving netdevice events */
3617 unregister_netdevice_notifier(&pktgen_notifier_block);
3619 /* Clean up proc file system */
3620 remove_proc_entry(PGCTRL, pg_proc_dir);
3621 proc_net_remove(PG_PROC_DIR);
3624 module_init(pg_init);
3625 module_exit(pg_cleanup);
3627 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3628 MODULE_DESCRIPTION("Packet Generator tool");
3629 MODULE_LICENSE("GPL");
3630 module_param(pg_count_d, int, 0);
3631 module_param(pg_delay_d, int, 0);
3632 module_param(pg_clone_skb_d, int, 0);
3633 module_param(debug, int, 0);