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 __constant_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)
216 * Try to keep frequent/infrequent used vars. separated.
219 char ifname[IFNAMSIZ];
222 struct pktgen_thread *pg_thread; /* the owner */
223 struct list_head list; /* Used for chaining in the thread's run-queue */
225 int running; /* if this changes to false, the test will stop */
227 /* If min != max, then we will either do a linear iteration, or
228 * we will do a random selection from within the range.
231 int removal_mark; /* non-zero => the device is marked for
232 * removal by worker thread */
234 int min_pkt_size; /* = ETH_ZLEN; */
235 int max_pkt_size; /* = ETH_ZLEN; */
237 __u32 delay_us; /* Default delay */
239 __u64 count; /* Default No packets to send */
240 __u64 sofar; /* How many pkts we've sent so far */
241 __u64 tx_bytes; /* How many bytes we've transmitted */
242 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
244 /* runtime counters relating to clone_skb */
245 __u64 next_tx_us; /* timestamp of when to tx next */
248 __u64 allocated_skbs;
250 int last_ok; /* Was last skb sent?
251 * Or a failed transmit of some sort? This will keep
252 * sequence numbers in order, for example.
254 __u64 started_at; /* micro-seconds */
255 __u64 stopped_at; /* micro-seconds */
256 __u64 idle_acc; /* micro-seconds */
259 int clone_skb; /* Use multiple SKBs during packet gen. If this number
260 * is greater than 1, then that many copies of the same
261 * packet will be sent before a new packet is allocated.
262 * For instance, if you want to send 1024 identical packets
263 * before creating a new packet, set clone_skb to 1024.
266 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
267 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
268 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
269 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
271 struct in6_addr in6_saddr;
272 struct in6_addr in6_daddr;
273 struct in6_addr cur_in6_daddr;
274 struct in6_addr cur_in6_saddr;
276 struct in6_addr min_in6_daddr;
277 struct in6_addr max_in6_daddr;
278 struct in6_addr min_in6_saddr;
279 struct in6_addr max_in6_saddr;
281 /* If we're doing ranges, random or incremental, then this
282 * defines the min/max for those ranges.
284 __be32 saddr_min; /* inclusive, source IP address */
285 __be32 saddr_max; /* exclusive, source IP address */
286 __be32 daddr_min; /* inclusive, dest IP address */
287 __be32 daddr_max; /* exclusive, dest IP address */
289 __u16 udp_src_min; /* inclusive, source UDP port */
290 __u16 udp_src_max; /* exclusive, source UDP port */
291 __u16 udp_dst_min; /* inclusive, dest UDP port */
292 __u16 udp_dst_max; /* exclusive, dest UDP port */
295 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
296 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
299 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
300 __be32 labels[MAX_MPLS_LABELS];
302 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
305 __u16 vlan_id; /* 0xffff means no vlan tag */
309 __u16 svlan_id; /* 0xffff means no svlan tag */
311 __u32 src_mac_count; /* How many MACs to iterate through */
312 __u32 dst_mac_count; /* How many MACs to iterate through */
314 unsigned char dst_mac[ETH_ALEN];
315 unsigned char src_mac[ETH_ALEN];
317 __u32 cur_dst_mac_offset;
318 __u32 cur_src_mac_offset;
327 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
329 We fill in SRC address later
330 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
334 __u16 pad; /* pad out the hh struct to an even 16 bytes */
336 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
337 * are transmitting the same one multiple times
339 struct net_device *odev; /* The out-going device. Note that the device should
340 * have it's pg_info pointer pointing back to this
341 * device. This will be set when the user specifies
342 * the out-going device name (not when the inject is
343 * started as it used to do.)
345 struct flow_state *flows;
346 unsigned cflows; /* Concurrent flows (config) */
347 unsigned lflow; /* Flow length (config) */
348 unsigned nflows; /* accumulated flows (stats) */
358 struct pktgen_thread {
360 struct list_head if_list; /* All device here */
361 struct list_head th_list;
362 struct task_struct *tsk;
364 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
366 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
372 wait_queue_head_t queue;
378 /* This code works around the fact that do_div cannot handle two 64-bit
379 numbers, and regular 64-bit division doesn't work on x86 kernels.
385 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
386 * Function copied/adapted/optimized from:
388 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
390 * Copyright 1994, University of Cambridge Computer Laboratory
391 * All Rights Reserved.
394 static inline s64 divremdi3(s64 x, s64 y, int type)
396 u64 a = (x < 0) ? -x : x;
397 u64 b = (y < 0) ? -y : y;
417 if (PG_DIV == type) {
418 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
420 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
424 /* End of hacks to deal with 64-bit math on x86 */
426 /** Convert to milliseconds */
427 static inline __u64 tv_to_ms(const struct timeval *tv)
429 __u64 ms = tv->tv_usec / 1000;
430 ms += (__u64) tv->tv_sec * (__u64) 1000;
434 /** Convert to micro-seconds */
435 static inline __u64 tv_to_us(const struct timeval *tv)
437 __u64 us = tv->tv_usec;
438 us += (__u64) tv->tv_sec * (__u64) 1000000;
442 static inline __u64 pg_div(__u64 n, __u32 base)
446 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
451 static inline __u64 pg_div64(__u64 n, __u64 base)
455 * How do we know if the architecture we are running on
456 * supports division with 64 bit base?
459 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
463 tmp = divremdi3(n, base, PG_DIV);
468 static inline u32 pktgen_random(void)
472 get_random_bytes(&n, 4);
479 static inline __u64 getCurMs(void)
482 do_gettimeofday(&tv);
483 return tv_to_ms(&tv);
486 static inline __u64 getCurUs(void)
489 do_gettimeofday(&tv);
490 return tv_to_us(&tv);
493 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
495 return tv_to_us(a) - tv_to_us(b);
498 /* old include end */
500 static char version[] __initdata = VERSION;
502 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
503 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
504 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
506 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
507 static void pktgen_run_all_threads(void);
508 static void pktgen_stop_all_threads_ifs(void);
509 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
510 static void pktgen_stop(struct pktgen_thread *t);
511 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
512 static int pktgen_mark_device(const char *ifname);
513 static unsigned int scan_ip6(const char *s, char ip[16]);
514 static unsigned int fmt_ip6(char *s, const char ip[16]);
516 /* Module parameters, defaults. */
517 static int pg_count_d = 1000; /* 1000 pkts by default */
518 static int pg_delay_d;
519 static int pg_clone_skb_d;
522 static DEFINE_MUTEX(pktgen_thread_lock);
523 static LIST_HEAD(pktgen_threads);
525 static struct notifier_block pktgen_notifier_block = {
526 .notifier_call = pktgen_device_event,
530 * /proc handling functions
534 static int pgctrl_show(struct seq_file *seq, void *v)
536 seq_puts(seq, VERSION);
540 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
541 size_t count, loff_t * ppos)
546 if (!capable(CAP_NET_ADMIN)) {
551 if (count > sizeof(data))
552 count = sizeof(data);
554 if (copy_from_user(data, buf, count)) {
558 data[count - 1] = 0; /* Make string */
560 if (!strcmp(data, "stop"))
561 pktgen_stop_all_threads_ifs();
563 else if (!strcmp(data, "start"))
564 pktgen_run_all_threads();
567 printk("pktgen: Unknown command: %s\n", data);
575 static int pgctrl_open(struct inode *inode, struct file *file)
577 return single_open(file, pgctrl_show, PDE(inode)->data);
580 static const struct file_operations pktgen_fops = {
581 .owner = THIS_MODULE,
585 .write = pgctrl_write,
586 .release = single_release,
589 static int pktgen_if_show(struct seq_file *seq, void *v)
592 struct pktgen_dev *pkt_dev = seq->private;
595 __u64 now = getCurUs();
598 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
599 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
600 pkt_dev->max_pkt_size);
603 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
605 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
606 pkt_dev->clone_skb, pkt_dev->ifname);
608 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
611 if (pkt_dev->flags & F_IPV6) {
612 char b1[128], b2[128], b3[128];
613 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
614 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
615 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
617 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
620 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
621 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
622 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
624 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
629 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
630 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
633 seq_puts(seq, " src_mac: ");
635 if (is_zero_ether_addr(pkt_dev->src_mac))
636 for (i = 0; i < 6; i++)
637 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
640 for (i = 0; i < 6; i++)
641 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
644 seq_printf(seq, "dst_mac: ");
645 for (i = 0; i < 6; i++)
646 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
647 i == 5 ? "\n" : ":");
650 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
651 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
652 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
655 " src_mac_count: %d dst_mac_count: %d\n",
656 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
658 if (pkt_dev->nr_labels) {
660 seq_printf(seq, " mpls: ");
661 for(i = 0; i < pkt_dev->nr_labels; i++)
662 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
663 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
666 if (pkt_dev->vlan_id != 0xffff) {
667 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
668 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
671 if (pkt_dev->svlan_id != 0xffff) {
672 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
673 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
677 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
680 if (pkt_dev->traffic_class) {
681 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
684 seq_printf(seq, " Flags: ");
686 if (pkt_dev->flags & F_IPV6)
687 seq_printf(seq, "IPV6 ");
689 if (pkt_dev->flags & F_IPSRC_RND)
690 seq_printf(seq, "IPSRC_RND ");
692 if (pkt_dev->flags & F_IPDST_RND)
693 seq_printf(seq, "IPDST_RND ");
695 if (pkt_dev->flags & F_TXSIZE_RND)
696 seq_printf(seq, "TXSIZE_RND ");
698 if (pkt_dev->flags & F_UDPSRC_RND)
699 seq_printf(seq, "UDPSRC_RND ");
701 if (pkt_dev->flags & F_UDPDST_RND)
702 seq_printf(seq, "UDPDST_RND ");
704 if (pkt_dev->flags & F_MPLS_RND)
705 seq_printf(seq, "MPLS_RND ");
707 if (pkt_dev->flags & F_MACSRC_RND)
708 seq_printf(seq, "MACSRC_RND ");
710 if (pkt_dev->flags & F_MACDST_RND)
711 seq_printf(seq, "MACDST_RND ");
713 if (pkt_dev->flags & F_VID_RND)
714 seq_printf(seq, "VID_RND ");
716 if (pkt_dev->flags & F_SVID_RND)
717 seq_printf(seq, "SVID_RND ");
721 sa = pkt_dev->started_at;
722 stopped = pkt_dev->stopped_at;
723 if (pkt_dev->running)
724 stopped = now; /* not really stopped, more like last-running-at */
727 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
728 (unsigned long long)pkt_dev->sofar,
729 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
730 (unsigned long long)stopped,
731 (unsigned long long)pkt_dev->idle_acc);
734 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
735 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
736 pkt_dev->cur_src_mac_offset);
738 if (pkt_dev->flags & F_IPV6) {
739 char b1[128], b2[128];
740 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
741 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
742 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
744 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
745 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
747 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
748 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
750 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
752 if (pkt_dev->result[0])
753 seq_printf(seq, "Result: %s\n", pkt_dev->result);
755 seq_printf(seq, "Result: Idle\n");
761 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
766 for(; i < maxlen; i++) {
769 if (get_user(c, &user_buffer[i]))
771 if ((c >= '0') && (c <= '9'))
773 else if ((c >= 'a') && (c <= 'f'))
774 *num |= c - 'a' + 10;
775 else if ((c >= 'A') && (c <= 'F'))
776 *num |= c - 'A' + 10;
783 static int count_trail_chars(const char __user * user_buffer,
788 for (i = 0; i < maxlen; i++) {
790 if (get_user(c, &user_buffer[i]))
808 static unsigned long num_arg(const char __user * user_buffer,
809 unsigned long maxlen, unsigned long *num)
814 for (; i < maxlen; i++) {
816 if (get_user(c, &user_buffer[i]))
818 if ((c >= '0') && (c <= '9')) {
827 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
831 for (; i < maxlen; i++) {
833 if (get_user(c, &user_buffer[i]))
851 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
858 pkt_dev->nr_labels = 0;
861 len = hex32_arg(&buffer[i], 8, &tmp);
864 pkt_dev->labels[n] = htonl(tmp);
865 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
866 pkt_dev->flags |= F_MPLS_RND;
868 if (get_user(c, &buffer[i]))
872 if (n >= MAX_MPLS_LABELS)
876 pkt_dev->nr_labels = n;
880 static ssize_t pktgen_if_write(struct file *file,
881 const char __user * user_buffer, size_t count,
884 struct seq_file *seq = (struct seq_file *)file->private_data;
885 struct pktgen_dev *pkt_dev = seq->private;
887 char name[16], valstr[32];
888 unsigned long value = 0;
889 char *pg_result = NULL;
893 pg_result = &(pkt_dev->result[0]);
896 printk("pktgen: wrong command format\n");
901 tmp = count_trail_chars(&user_buffer[i], max);
903 printk("pktgen: illegal format\n");
908 /* Read variable name */
910 len = strn_len(&user_buffer[i], sizeof(name) - 1);
914 memset(name, 0, sizeof(name));
915 if (copy_from_user(name, &user_buffer[i], len))
920 len = count_trail_chars(&user_buffer[i], max);
928 if (copy_from_user(tb, user_buffer, count))
931 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
932 (unsigned long)count, tb);
935 if (!strcmp(name, "min_pkt_size")) {
936 len = num_arg(&user_buffer[i], 10, &value);
941 if (value < 14 + 20 + 8)
943 if (value != pkt_dev->min_pkt_size) {
944 pkt_dev->min_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
947 sprintf(pg_result, "OK: min_pkt_size=%u",
948 pkt_dev->min_pkt_size);
952 if (!strcmp(name, "max_pkt_size")) {
953 len = num_arg(&user_buffer[i], 10, &value);
958 if (value < 14 + 20 + 8)
960 if (value != pkt_dev->max_pkt_size) {
961 pkt_dev->max_pkt_size = value;
962 pkt_dev->cur_pkt_size = value;
964 sprintf(pg_result, "OK: max_pkt_size=%u",
965 pkt_dev->max_pkt_size);
969 /* Shortcut for min = max */
971 if (!strcmp(name, "pkt_size")) {
972 len = num_arg(&user_buffer[i], 10, &value);
977 if (value < 14 + 20 + 8)
979 if (value != pkt_dev->min_pkt_size) {
980 pkt_dev->min_pkt_size = value;
981 pkt_dev->max_pkt_size = value;
982 pkt_dev->cur_pkt_size = value;
984 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
988 if (!strcmp(name, "debug")) {
989 len = num_arg(&user_buffer[i], 10, &value);
995 sprintf(pg_result, "OK: debug=%u", debug);
999 if (!strcmp(name, "frags")) {
1000 len = num_arg(&user_buffer[i], 10, &value);
1005 pkt_dev->nfrags = value;
1006 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
1009 if (!strcmp(name, "delay")) {
1010 len = num_arg(&user_buffer[i], 10, &value);
1015 if (value == 0x7FFFFFFF) {
1016 pkt_dev->delay_us = 0x7FFFFFFF;
1017 pkt_dev->delay_ns = 0;
1019 pkt_dev->delay_us = value / 1000;
1020 pkt_dev->delay_ns = value % 1000;
1022 sprintf(pg_result, "OK: delay=%u",
1023 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1026 if (!strcmp(name, "udp_src_min")) {
1027 len = num_arg(&user_buffer[i], 10, &value);
1032 if (value != pkt_dev->udp_src_min) {
1033 pkt_dev->udp_src_min = value;
1034 pkt_dev->cur_udp_src = value;
1036 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1039 if (!strcmp(name, "udp_dst_min")) {
1040 len = num_arg(&user_buffer[i], 10, &value);
1045 if (value != pkt_dev->udp_dst_min) {
1046 pkt_dev->udp_dst_min = value;
1047 pkt_dev->cur_udp_dst = value;
1049 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1052 if (!strcmp(name, "udp_src_max")) {
1053 len = num_arg(&user_buffer[i], 10, &value);
1058 if (value != pkt_dev->udp_src_max) {
1059 pkt_dev->udp_src_max = value;
1060 pkt_dev->cur_udp_src = value;
1062 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1065 if (!strcmp(name, "udp_dst_max")) {
1066 len = num_arg(&user_buffer[i], 10, &value);
1071 if (value != pkt_dev->udp_dst_max) {
1072 pkt_dev->udp_dst_max = value;
1073 pkt_dev->cur_udp_dst = value;
1075 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1078 if (!strcmp(name, "clone_skb")) {
1079 len = num_arg(&user_buffer[i], 10, &value);
1084 pkt_dev->clone_skb = value;
1086 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1089 if (!strcmp(name, "count")) {
1090 len = num_arg(&user_buffer[i], 10, &value);
1095 pkt_dev->count = value;
1096 sprintf(pg_result, "OK: count=%llu",
1097 (unsigned long long)pkt_dev->count);
1100 if (!strcmp(name, "src_mac_count")) {
1101 len = num_arg(&user_buffer[i], 10, &value);
1106 if (pkt_dev->src_mac_count != value) {
1107 pkt_dev->src_mac_count = value;
1108 pkt_dev->cur_src_mac_offset = 0;
1110 sprintf(pg_result, "OK: src_mac_count=%d",
1111 pkt_dev->src_mac_count);
1114 if (!strcmp(name, "dst_mac_count")) {
1115 len = num_arg(&user_buffer[i], 10, &value);
1120 if (pkt_dev->dst_mac_count != value) {
1121 pkt_dev->dst_mac_count = value;
1122 pkt_dev->cur_dst_mac_offset = 0;
1124 sprintf(pg_result, "OK: dst_mac_count=%d",
1125 pkt_dev->dst_mac_count);
1128 if (!strcmp(name, "flag")) {
1131 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1135 if (copy_from_user(f, &user_buffer[i], len))
1138 if (strcmp(f, "IPSRC_RND") == 0)
1139 pkt_dev->flags |= F_IPSRC_RND;
1141 else if (strcmp(f, "!IPSRC_RND") == 0)
1142 pkt_dev->flags &= ~F_IPSRC_RND;
1144 else if (strcmp(f, "TXSIZE_RND") == 0)
1145 pkt_dev->flags |= F_TXSIZE_RND;
1147 else if (strcmp(f, "!TXSIZE_RND") == 0)
1148 pkt_dev->flags &= ~F_TXSIZE_RND;
1150 else if (strcmp(f, "IPDST_RND") == 0)
1151 pkt_dev->flags |= F_IPDST_RND;
1153 else if (strcmp(f, "!IPDST_RND") == 0)
1154 pkt_dev->flags &= ~F_IPDST_RND;
1156 else if (strcmp(f, "UDPSRC_RND") == 0)
1157 pkt_dev->flags |= F_UDPSRC_RND;
1159 else if (strcmp(f, "!UDPSRC_RND") == 0)
1160 pkt_dev->flags &= ~F_UDPSRC_RND;
1162 else if (strcmp(f, "UDPDST_RND") == 0)
1163 pkt_dev->flags |= F_UDPDST_RND;
1165 else if (strcmp(f, "!UDPDST_RND") == 0)
1166 pkt_dev->flags &= ~F_UDPDST_RND;
1168 else if (strcmp(f, "MACSRC_RND") == 0)
1169 pkt_dev->flags |= F_MACSRC_RND;
1171 else if (strcmp(f, "!MACSRC_RND") == 0)
1172 pkt_dev->flags &= ~F_MACSRC_RND;
1174 else if (strcmp(f, "MACDST_RND") == 0)
1175 pkt_dev->flags |= F_MACDST_RND;
1177 else if (strcmp(f, "!MACDST_RND") == 0)
1178 pkt_dev->flags &= ~F_MACDST_RND;
1180 else if (strcmp(f, "MPLS_RND") == 0)
1181 pkt_dev->flags |= F_MPLS_RND;
1183 else if (strcmp(f, "!MPLS_RND") == 0)
1184 pkt_dev->flags &= ~F_MPLS_RND;
1186 else if (strcmp(f, "VID_RND") == 0)
1187 pkt_dev->flags |= F_VID_RND;
1189 else if (strcmp(f, "!VID_RND") == 0)
1190 pkt_dev->flags &= ~F_VID_RND;
1192 else if (strcmp(f, "SVID_RND") == 0)
1193 pkt_dev->flags |= F_SVID_RND;
1195 else if (strcmp(f, "!SVID_RND") == 0)
1196 pkt_dev->flags &= ~F_SVID_RND;
1198 else if (strcmp(f, "!IPV6") == 0)
1199 pkt_dev->flags &= ~F_IPV6;
1203 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1205 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1206 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
1209 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1212 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1213 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1218 if (copy_from_user(buf, &user_buffer[i], len))
1221 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1222 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1223 strncpy(pkt_dev->dst_min, buf, len);
1224 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1225 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1228 printk("pktgen: dst_min set to: %s\n",
1231 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1234 if (!strcmp(name, "dst_max")) {
1235 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1240 if (copy_from_user(buf, &user_buffer[i], len))
1244 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1245 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1246 strncpy(pkt_dev->dst_max, buf, len);
1247 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1248 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1251 printk("pktgen: dst_max set to: %s\n",
1254 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1257 if (!strcmp(name, "dst6")) {
1258 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1262 pkt_dev->flags |= F_IPV6;
1264 if (copy_from_user(buf, &user_buffer[i], len))
1268 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1269 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1271 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1274 printk("pktgen: dst6 set to: %s\n", buf);
1277 sprintf(pg_result, "OK: dst6=%s", buf);
1280 if (!strcmp(name, "dst6_min")) {
1281 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1285 pkt_dev->flags |= F_IPV6;
1287 if (copy_from_user(buf, &user_buffer[i], len))
1291 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1292 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1294 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1295 &pkt_dev->min_in6_daddr);
1297 printk("pktgen: dst6_min set to: %s\n", buf);
1300 sprintf(pg_result, "OK: dst6_min=%s", buf);
1303 if (!strcmp(name, "dst6_max")) {
1304 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1308 pkt_dev->flags |= F_IPV6;
1310 if (copy_from_user(buf, &user_buffer[i], len))
1314 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1315 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1318 printk("pktgen: dst6_max set to: %s\n", buf);
1321 sprintf(pg_result, "OK: dst6_max=%s", buf);
1324 if (!strcmp(name, "src6")) {
1325 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1329 pkt_dev->flags |= F_IPV6;
1331 if (copy_from_user(buf, &user_buffer[i], len))
1335 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1336 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1338 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1341 printk("pktgen: src6 set to: %s\n", buf);
1344 sprintf(pg_result, "OK: src6=%s", buf);
1347 if (!strcmp(name, "src_min")) {
1348 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1352 if (copy_from_user(buf, &user_buffer[i], len))
1355 if (strcmp(buf, pkt_dev->src_min) != 0) {
1356 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1357 strncpy(pkt_dev->src_min, buf, len);
1358 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1359 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1362 printk("pktgen: src_min set to: %s\n",
1365 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1368 if (!strcmp(name, "src_max")) {
1369 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1373 if (copy_from_user(buf, &user_buffer[i], len))
1376 if (strcmp(buf, pkt_dev->src_max) != 0) {
1377 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1378 strncpy(pkt_dev->src_max, buf, len);
1379 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1380 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1383 printk("pktgen: src_max set to: %s\n",
1386 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1389 if (!strcmp(name, "dst_mac")) {
1391 unsigned char old_dmac[ETH_ALEN];
1392 unsigned char *m = pkt_dev->dst_mac;
1393 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1395 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1399 memset(valstr, 0, sizeof(valstr));
1400 if (copy_from_user(valstr, &user_buffer[i], len))
1404 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1405 if (*v >= '0' && *v <= '9') {
1409 if (*v >= 'A' && *v <= 'F') {
1411 *m += *v - 'A' + 10;
1413 if (*v >= 'a' && *v <= 'f') {
1415 *m += *v - 'a' + 10;
1423 /* Set up Dest MAC */
1424 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1425 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1427 sprintf(pg_result, "OK: dstmac");
1430 if (!strcmp(name, "src_mac")) {
1432 unsigned char *m = pkt_dev->src_mac;
1434 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1438 memset(valstr, 0, sizeof(valstr));
1439 if (copy_from_user(valstr, &user_buffer[i], len))
1443 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1444 if (*v >= '0' && *v <= '9') {
1448 if (*v >= 'A' && *v <= 'F') {
1450 *m += *v - 'A' + 10;
1452 if (*v >= 'a' && *v <= 'f') {
1454 *m += *v - 'a' + 10;
1462 sprintf(pg_result, "OK: srcmac");
1466 if (!strcmp(name, "clear_counters")) {
1467 pktgen_clear_counters(pkt_dev);
1468 sprintf(pg_result, "OK: Clearing counters.\n");
1472 if (!strcmp(name, "flows")) {
1473 len = num_arg(&user_buffer[i], 10, &value);
1478 if (value > MAX_CFLOWS)
1481 pkt_dev->cflows = value;
1482 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1486 if (!strcmp(name, "flowlen")) {
1487 len = num_arg(&user_buffer[i], 10, &value);
1492 pkt_dev->lflow = value;
1493 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1497 if (!strcmp(name, "mpls")) {
1499 len = get_labels(&user_buffer[i], pkt_dev);
1500 if (len < 0) { return len; }
1502 offset = sprintf(pg_result, "OK: mpls=");
1503 for(n = 0; n < pkt_dev->nr_labels; n++)
1504 offset += sprintf(pg_result + offset,
1505 "%08x%s", ntohl(pkt_dev->labels[n]),
1506 n == pkt_dev->nr_labels-1 ? "" : ",");
1508 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1509 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1510 pkt_dev->svlan_id = 0xffff;
1513 printk("pktgen: VLAN/SVLAN auto turned off\n");
1518 if (!strcmp(name, "vlan_id")) {
1519 len = num_arg(&user_buffer[i], 4, &value);
1524 if (value <= 4095) {
1525 pkt_dev->vlan_id = value; /* turn on VLAN */
1528 printk("pktgen: VLAN turned on\n");
1530 if (debug && pkt_dev->nr_labels)
1531 printk("pktgen: MPLS auto turned off\n");
1533 pkt_dev->nr_labels = 0; /* turn off MPLS */
1534 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1536 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1537 pkt_dev->svlan_id = 0xffff;
1540 printk("pktgen: VLAN/SVLAN turned off\n");
1545 if (!strcmp(name, "vlan_p")) {
1546 len = num_arg(&user_buffer[i], 1, &value);
1551 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1552 pkt_dev->vlan_p = value;
1553 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1555 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1560 if (!strcmp(name, "vlan_cfi")) {
1561 len = num_arg(&user_buffer[i], 1, &value);
1566 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1567 pkt_dev->vlan_cfi = value;
1568 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1570 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1575 if (!strcmp(name, "svlan_id")) {
1576 len = num_arg(&user_buffer[i], 4, &value);
1581 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1582 pkt_dev->svlan_id = value; /* turn on SVLAN */
1585 printk("pktgen: SVLAN turned on\n");
1587 if (debug && pkt_dev->nr_labels)
1588 printk("pktgen: MPLS auto turned off\n");
1590 pkt_dev->nr_labels = 0; /* turn off MPLS */
1591 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1593 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1594 pkt_dev->svlan_id = 0xffff;
1597 printk("pktgen: VLAN/SVLAN turned off\n");
1602 if (!strcmp(name, "svlan_p")) {
1603 len = num_arg(&user_buffer[i], 1, &value);
1608 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1609 pkt_dev->svlan_p = value;
1610 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1612 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1617 if (!strcmp(name, "svlan_cfi")) {
1618 len = num_arg(&user_buffer[i], 1, &value);
1623 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1624 pkt_dev->svlan_cfi = value;
1625 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1627 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1632 if (!strcmp(name, "tos")) {
1633 __u32 tmp_value = 0;
1634 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1640 pkt_dev->tos = tmp_value;
1641 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1643 sprintf(pg_result, "ERROR: tos must be 00-ff");
1648 if (!strcmp(name, "traffic_class")) {
1649 __u32 tmp_value = 0;
1650 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1656 pkt_dev->traffic_class = tmp_value;
1657 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1659 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1664 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1668 static int pktgen_if_open(struct inode *inode, struct file *file)
1670 return single_open(file, pktgen_if_show, PDE(inode)->data);
1673 static const struct file_operations pktgen_if_fops = {
1674 .owner = THIS_MODULE,
1675 .open = pktgen_if_open,
1677 .llseek = seq_lseek,
1678 .write = pktgen_if_write,
1679 .release = single_release,
1682 static int pktgen_thread_show(struct seq_file *seq, void *v)
1684 struct pktgen_thread *t = seq->private;
1685 struct pktgen_dev *pkt_dev;
1689 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1690 t->tsk->comm, t->max_before_softirq);
1692 seq_printf(seq, "Running: ");
1695 list_for_each_entry(pkt_dev, &t->if_list, list)
1696 if (pkt_dev->running)
1697 seq_printf(seq, "%s ", pkt_dev->ifname);
1699 seq_printf(seq, "\nStopped: ");
1701 list_for_each_entry(pkt_dev, &t->if_list, list)
1702 if (!pkt_dev->running)
1703 seq_printf(seq, "%s ", pkt_dev->ifname);
1706 seq_printf(seq, "\nResult: %s\n", t->result);
1708 seq_printf(seq, "\nResult: NA\n");
1715 static ssize_t pktgen_thread_write(struct file *file,
1716 const char __user * user_buffer,
1717 size_t count, loff_t * offset)
1719 struct seq_file *seq = (struct seq_file *)file->private_data;
1720 struct pktgen_thread *t = seq->private;
1721 int i = 0, max, len, ret;
1724 unsigned long value = 0;
1727 // sprintf(pg_result, "Wrong command format");
1732 len = count_trail_chars(&user_buffer[i], max);
1738 /* Read variable name */
1740 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1744 memset(name, 0, sizeof(name));
1745 if (copy_from_user(name, &user_buffer[i], len))
1750 len = count_trail_chars(&user_buffer[i], max);
1757 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1760 printk("pktgen: ERROR: No thread\n");
1765 pg_result = &(t->result[0]);
1767 if (!strcmp(name, "add_device")) {
1770 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1775 if (copy_from_user(f, &user_buffer[i], len))
1778 mutex_lock(&pktgen_thread_lock);
1779 pktgen_add_device(t, f);
1780 mutex_unlock(&pktgen_thread_lock);
1782 sprintf(pg_result, "OK: add_device=%s", f);
1786 if (!strcmp(name, "rem_device_all")) {
1787 mutex_lock(&pktgen_thread_lock);
1788 t->control |= T_REMDEVALL;
1789 mutex_unlock(&pktgen_thread_lock);
1790 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1792 sprintf(pg_result, "OK: rem_device_all");
1796 if (!strcmp(name, "max_before_softirq")) {
1797 len = num_arg(&user_buffer[i], 10, &value);
1798 mutex_lock(&pktgen_thread_lock);
1799 t->max_before_softirq = value;
1800 mutex_unlock(&pktgen_thread_lock);
1802 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1811 static int pktgen_thread_open(struct inode *inode, struct file *file)
1813 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1816 static const struct file_operations pktgen_thread_fops = {
1817 .owner = THIS_MODULE,
1818 .open = pktgen_thread_open,
1820 .llseek = seq_lseek,
1821 .write = pktgen_thread_write,
1822 .release = single_release,
1825 /* Think find or remove for NN */
1826 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1828 struct pktgen_thread *t;
1829 struct pktgen_dev *pkt_dev = NULL;
1831 list_for_each_entry(t, &pktgen_threads, th_list) {
1832 pkt_dev = pktgen_find_dev(t, ifname);
1836 pkt_dev->removal_mark = 1;
1837 t->control |= T_REMDEV;
1847 * mark a device for removal
1849 static int pktgen_mark_device(const char *ifname)
1851 struct pktgen_dev *pkt_dev = NULL;
1852 const int max_tries = 10, msec_per_try = 125;
1856 mutex_lock(&pktgen_thread_lock);
1857 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1861 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1862 if (pkt_dev == NULL)
1863 break; /* success */
1865 mutex_unlock(&pktgen_thread_lock);
1866 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1867 "to disappear....\n", ifname);
1868 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1869 mutex_lock(&pktgen_thread_lock);
1871 if (++i >= max_tries) {
1872 printk("pktgen_mark_device: timed out after waiting "
1873 "%d msec for device %s to be removed\n",
1874 msec_per_try * i, ifname);
1881 mutex_unlock(&pktgen_thread_lock);
1886 static int pktgen_device_event(struct notifier_block *unused,
1887 unsigned long event, void *ptr)
1889 struct net_device *dev = (struct net_device *)(ptr);
1891 /* It is OK that we do not hold the group lock right now,
1892 * as we run under the RTNL lock.
1896 case NETDEV_CHANGEADDR:
1897 case NETDEV_GOING_DOWN:
1900 /* Ignore for now */
1903 case NETDEV_UNREGISTER:
1904 pktgen_mark_device(dev->name);
1911 /* Associate pktgen_dev with a device. */
1913 static struct net_device *pktgen_setup_dev(struct pktgen_dev *pkt_dev)
1915 struct net_device *odev;
1917 /* Clean old setups */
1919 if (pkt_dev->odev) {
1920 dev_put(pkt_dev->odev);
1921 pkt_dev->odev = NULL;
1924 odev = dev_get_by_name(pkt_dev->ifname);
1927 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1930 if (odev->type != ARPHRD_ETHER) {
1931 printk("pktgen: not an ethernet device: \"%s\"\n",
1935 if (!netif_running(odev)) {
1936 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1939 pkt_dev->odev = odev;
1941 return pkt_dev->odev;
1950 /* Read pkt_dev from the interface and set up internal pktgen_dev
1951 * structure to have the right information to create/send packets
1953 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1955 /* Try once more, just in case it works now. */
1957 pktgen_setup_dev(pkt_dev);
1959 if (!pkt_dev->odev) {
1960 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1961 sprintf(pkt_dev->result,
1962 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1966 /* Default to the interface's mac if not explicitly set. */
1968 if (is_zero_ether_addr(pkt_dev->src_mac))
1969 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1971 /* Set up Dest MAC */
1972 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1974 /* Set up pkt size */
1975 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1977 if (pkt_dev->flags & F_IPV6) {
1979 * Skip this automatic address setting until locks or functions
1984 int i, set = 0, err = 1;
1985 struct inet6_dev *idev;
1987 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1988 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1996 * Use linklevel address if unconfigured.
1998 * use ipv6_get_lladdr if/when it's get exported
2002 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2003 struct inet6_ifaddr *ifp;
2005 read_lock_bh(&idev->lock);
2006 for (ifp = idev->addr_list; ifp;
2007 ifp = ifp->if_next) {
2008 if (ifp->scope == IFA_LINK
2010 flags & IFA_F_TENTATIVE)) {
2011 ipv6_addr_copy(&pkt_dev->
2018 read_unlock_bh(&idev->lock);
2022 printk("pktgen: ERROR: IPv6 link address not availble.\n");
2026 pkt_dev->saddr_min = 0;
2027 pkt_dev->saddr_max = 0;
2028 if (strlen(pkt_dev->src_min) == 0) {
2030 struct in_device *in_dev;
2033 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2035 if (in_dev->ifa_list) {
2036 pkt_dev->saddr_min =
2037 in_dev->ifa_list->ifa_address;
2038 pkt_dev->saddr_max = pkt_dev->saddr_min;
2043 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2044 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2047 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2048 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2050 /* Initialize current values. */
2051 pkt_dev->cur_dst_mac_offset = 0;
2052 pkt_dev->cur_src_mac_offset = 0;
2053 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2054 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2055 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2056 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2057 pkt_dev->nflows = 0;
2060 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2065 start = now = getCurUs();
2066 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2067 while (now < spin_until_us) {
2068 /* TODO: optimize sleeping behavior */
2069 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2070 schedule_timeout_interruptible(1);
2071 else if (spin_until_us - now > 100) {
2073 if (!pkt_dev->running)
2082 pkt_dev->idle_acc += now - start;
2085 /* Increment/randomize headers according to flags and current values
2086 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2088 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2094 if (pkt_dev->cflows) {
2095 flow = pktgen_random() % pkt_dev->cflows;
2097 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2098 pkt_dev->flows[flow].count = 0;
2101 /* Deal with source MAC */
2102 if (pkt_dev->src_mac_count > 1) {
2106 if (pkt_dev->flags & F_MACSRC_RND)
2107 mc = pktgen_random() % (pkt_dev->src_mac_count);
2109 mc = pkt_dev->cur_src_mac_offset++;
2110 if (pkt_dev->cur_src_mac_offset >
2111 pkt_dev->src_mac_count)
2112 pkt_dev->cur_src_mac_offset = 0;
2115 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2116 pkt_dev->hh[11] = tmp;
2117 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2118 pkt_dev->hh[10] = tmp;
2119 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2120 pkt_dev->hh[9] = tmp;
2121 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2122 pkt_dev->hh[8] = tmp;
2123 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2124 pkt_dev->hh[7] = tmp;
2127 /* Deal with Destination MAC */
2128 if (pkt_dev->dst_mac_count > 1) {
2132 if (pkt_dev->flags & F_MACDST_RND)
2133 mc = pktgen_random() % (pkt_dev->dst_mac_count);
2136 mc = pkt_dev->cur_dst_mac_offset++;
2137 if (pkt_dev->cur_dst_mac_offset >
2138 pkt_dev->dst_mac_count) {
2139 pkt_dev->cur_dst_mac_offset = 0;
2143 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2144 pkt_dev->hh[5] = tmp;
2145 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2146 pkt_dev->hh[4] = tmp;
2147 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2148 pkt_dev->hh[3] = tmp;
2149 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2150 pkt_dev->hh[2] = tmp;
2151 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2152 pkt_dev->hh[1] = tmp;
2155 if (pkt_dev->flags & F_MPLS_RND) {
2157 for(i = 0; i < pkt_dev->nr_labels; i++)
2158 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2159 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2160 ((__force __be32)pktgen_random() &
2164 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2165 pkt_dev->vlan_id = pktgen_random() % 4096;
2168 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2169 pkt_dev->svlan_id = pktgen_random() % 4096;
2172 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2173 if (pkt_dev->flags & F_UDPSRC_RND)
2174 pkt_dev->cur_udp_src =
2176 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) +
2177 pkt_dev->udp_src_min);
2180 pkt_dev->cur_udp_src++;
2181 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2182 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2186 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2187 if (pkt_dev->flags & F_UDPDST_RND) {
2188 pkt_dev->cur_udp_dst =
2190 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) +
2191 pkt_dev->udp_dst_min);
2193 pkt_dev->cur_udp_dst++;
2194 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2195 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2199 if (!(pkt_dev->flags & F_IPV6)) {
2201 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2205 if (pkt_dev->flags & F_IPSRC_RND)
2206 t = ((pktgen_random() % (imx - imn)) + imn);
2208 t = ntohl(pkt_dev->cur_saddr);
2214 pkt_dev->cur_saddr = htonl(t);
2217 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
2218 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2220 imn = ntohl(pkt_dev->daddr_min);
2221 imx = ntohl(pkt_dev->daddr_max);
2225 if (pkt_dev->flags & F_IPDST_RND) {
2227 t = pktgen_random() % (imx - imn) + imn;
2230 while (LOOPBACK(s) || MULTICAST(s)
2231 || BADCLASS(s) || ZERONET(s)
2232 || LOCAL_MCAST(s)) {
2233 t = (pktgen_random() %
2237 pkt_dev->cur_daddr = s;
2239 t = ntohl(pkt_dev->cur_daddr);
2244 pkt_dev->cur_daddr = htonl(t);
2247 if (pkt_dev->cflows) {
2248 pkt_dev->flows[flow].cur_daddr =
2253 } else { /* IPV6 * */
2255 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2256 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2257 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2258 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2262 /* Only random destinations yet */
2264 for (i = 0; i < 4; i++) {
2265 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2266 (((__force __be32)pktgen_random() |
2267 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2268 pkt_dev->max_in6_daddr.s6_addr32[i]);
2273 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2275 if (pkt_dev->flags & F_TXSIZE_RND) {
2276 t = ((pktgen_random() %
2277 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
2278 + pkt_dev->min_pkt_size);
2280 t = pkt_dev->cur_pkt_size + 1;
2281 if (t > pkt_dev->max_pkt_size)
2282 t = pkt_dev->min_pkt_size;
2284 pkt_dev->cur_pkt_size = t;
2287 pkt_dev->flows[flow].count++;
2290 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2293 for(i = 0; i < pkt_dev->nr_labels; i++) {
2294 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2297 *mpls |= MPLS_STACK_BOTTOM;
2300 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2303 return htons(id | (cfi << 12) | (prio << 13));
2306 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2307 struct pktgen_dev *pkt_dev)
2309 struct sk_buff *skb = NULL;
2311 struct udphdr *udph;
2314 struct pktgen_hdr *pgh = NULL;
2315 __be16 protocol = __constant_htons(ETH_P_IP);
2317 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2318 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2319 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2320 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2323 if (pkt_dev->nr_labels)
2324 protocol = __constant_htons(ETH_P_MPLS_UC);
2326 if (pkt_dev->vlan_id != 0xffff)
2327 protocol = __constant_htons(ETH_P_8021Q);
2329 /* Update any of the values, used when we're incrementing various
2332 mod_cur_headers(pkt_dev);
2334 datalen = (odev->hard_header_len + 16) & ~0xf;
2335 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2336 pkt_dev->nr_labels*sizeof(u32) +
2337 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2340 sprintf(pkt_dev->result, "No memory");
2344 skb_reserve(skb, datalen);
2346 /* Reserve for ethernet and IP header */
2347 eth = (__u8 *) skb_push(skb, 14);
2348 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2349 if (pkt_dev->nr_labels)
2350 mpls_push(mpls, pkt_dev);
2352 if (pkt_dev->vlan_id != 0xffff) {
2353 if(pkt_dev->svlan_id != 0xffff) {
2354 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2355 *svlan_tci = build_tci(pkt_dev->svlan_id,
2358 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2359 *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
2361 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2362 *vlan_tci = build_tci(pkt_dev->vlan_id,
2365 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2366 *vlan_encapsulated_proto = __constant_htons(ETH_P_IP);
2369 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
2370 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2372 memcpy(eth, pkt_dev->hh, 12);
2373 *(__be16 *) & eth[12] = protocol;
2375 /* Eth + IPh + UDPh + mpls */
2376 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2377 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2378 if (datalen < sizeof(struct pktgen_hdr))
2379 datalen = sizeof(struct pktgen_hdr);
2381 udph->source = htons(pkt_dev->cur_udp_src);
2382 udph->dest = htons(pkt_dev->cur_udp_dst);
2383 udph->len = htons(datalen + 8); /* DATA + udphdr */
2384 udph->check = 0; /* No checksum */
2389 iph->tos = pkt_dev->tos;
2390 iph->protocol = IPPROTO_UDP; /* UDP */
2391 iph->saddr = pkt_dev->cur_saddr;
2392 iph->daddr = pkt_dev->cur_daddr;
2394 iplen = 20 + 8 + datalen;
2395 iph->tot_len = htons(iplen);
2397 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2398 skb->protocol = protocol;
2399 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2400 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2402 skb->pkt_type = PACKET_HOST;
2406 if (pkt_dev->nfrags <= 0)
2407 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2409 int frags = pkt_dev->nfrags;
2412 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2414 if (frags > MAX_SKB_FRAGS)
2415 frags = MAX_SKB_FRAGS;
2416 if (datalen > frags * PAGE_SIZE) {
2417 skb_put(skb, datalen - frags * PAGE_SIZE);
2418 datalen = frags * PAGE_SIZE;
2422 while (datalen > 0) {
2423 struct page *page = alloc_pages(GFP_KERNEL, 0);
2424 skb_shinfo(skb)->frags[i].page = page;
2425 skb_shinfo(skb)->frags[i].page_offset = 0;
2426 skb_shinfo(skb)->frags[i].size =
2427 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2428 datalen -= skb_shinfo(skb)->frags[i].size;
2429 skb->len += skb_shinfo(skb)->frags[i].size;
2430 skb->data_len += skb_shinfo(skb)->frags[i].size;
2432 skb_shinfo(skb)->nr_frags = i;
2441 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2445 skb_shinfo(skb)->frags[i - 1].size -= rem;
2447 skb_shinfo(skb)->frags[i] =
2448 skb_shinfo(skb)->frags[i - 1];
2449 get_page(skb_shinfo(skb)->frags[i].page);
2450 skb_shinfo(skb)->frags[i].page =
2451 skb_shinfo(skb)->frags[i - 1].page;
2452 skb_shinfo(skb)->frags[i].page_offset +=
2453 skb_shinfo(skb)->frags[i - 1].size;
2454 skb_shinfo(skb)->frags[i].size = rem;
2456 skb_shinfo(skb)->nr_frags = i;
2460 /* Stamp the time, and sequence number, convert them to network byte order */
2463 struct timeval timestamp;
2465 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2466 pgh->seq_num = htonl(pkt_dev->seq_num);
2468 do_gettimeofday(×tamp);
2469 pgh->tv_sec = htonl(timestamp.tv_sec);
2470 pgh->tv_usec = htonl(timestamp.tv_usec);
2477 * scan_ip6, fmt_ip taken from dietlibc-0.21
2478 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2480 * Slightly modified for kernel.
2481 * Should be candidate for net/ipv4/utils.c
2485 static unsigned int scan_ip6(const char *s, char ip[16])
2488 unsigned int len = 0;
2491 unsigned int prefixlen = 0;
2492 unsigned int suffixlen = 0;
2495 for (i = 0; i < 16; i++)
2501 if (s[1] == ':') { /* Found "::", skip to part 2 */
2510 u = simple_strtoul(s, &tmp, 16);
2516 if (prefixlen == 12 && s[i] == '.') {
2518 /* the last 4 bytes may be written as IPv4 address */
2521 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2524 ip[prefixlen++] = (u >> 8);
2525 ip[prefixlen++] = (u & 255);
2528 if (prefixlen == 16)
2532 /* part 2, after "::" */
2539 } else if (suffixlen != 0)
2543 u = simple_strtol(s, &tmp, 16);
2551 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2553 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2559 suffix[suffixlen++] = (u >> 8);
2560 suffix[suffixlen++] = (u & 255);
2563 if (prefixlen + suffixlen == 16)
2566 for (i = 0; i < suffixlen; i++)
2567 ip[16 - suffixlen + i] = suffix[i];
2571 static char tohex(char hexdigit)
2573 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2576 static int fmt_xlong(char *s, unsigned int i)
2579 *s = tohex((i >> 12) & 0xf);
2580 if (s != bak || *s != '0')
2582 *s = tohex((i >> 8) & 0xf);
2583 if (s != bak || *s != '0')
2585 *s = tohex((i >> 4) & 0xf);
2586 if (s != bak || *s != '0')
2588 *s = tohex(i & 0xf);
2592 static unsigned int fmt_ip6(char *s, const char ip[16])
2597 unsigned int compressing;
2602 for (j = 0; j < 16; j += 2) {
2604 #ifdef V4MAPPEDPREFIX
2605 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2606 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2611 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2612 (unsigned long)(unsigned char)ip[j + 1];
2627 i = fmt_xlong(s, temp);
2644 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2645 struct pktgen_dev *pkt_dev)
2647 struct sk_buff *skb = NULL;
2649 struct udphdr *udph;
2651 struct ipv6hdr *iph;
2652 struct pktgen_hdr *pgh = NULL;
2653 __be16 protocol = __constant_htons(ETH_P_IPV6);
2655 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2656 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2657 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2658 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2660 if (pkt_dev->nr_labels)
2661 protocol = __constant_htons(ETH_P_MPLS_UC);
2663 if (pkt_dev->vlan_id != 0xffff)
2664 protocol = __constant_htons(ETH_P_8021Q);
2666 /* Update any of the values, used when we're incrementing various
2669 mod_cur_headers(pkt_dev);
2671 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2672 pkt_dev->nr_labels*sizeof(u32) +
2673 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2676 sprintf(pkt_dev->result, "No memory");
2680 skb_reserve(skb, 16);
2682 /* Reserve for ethernet and IP header */
2683 eth = (__u8 *) skb_push(skb, 14);
2684 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2685 if (pkt_dev->nr_labels)
2686 mpls_push(mpls, pkt_dev);
2688 if (pkt_dev->vlan_id != 0xffff) {
2689 if(pkt_dev->svlan_id != 0xffff) {
2690 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2691 *svlan_tci = build_tci(pkt_dev->svlan_id,
2694 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2695 *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
2697 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2698 *vlan_tci = build_tci(pkt_dev->vlan_id,
2701 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2702 *vlan_encapsulated_proto = __constant_htons(ETH_P_IPV6);
2705 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2706 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2708 memcpy(eth, pkt_dev->hh, 12);
2709 *(__be16 *) & eth[12] = protocol;
2711 /* Eth + IPh + UDPh + mpls */
2712 datalen = pkt_dev->cur_pkt_size - 14 -
2713 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2714 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2716 if (datalen < sizeof(struct pktgen_hdr)) {
2717 datalen = sizeof(struct pktgen_hdr);
2718 if (net_ratelimit())
2719 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2723 udph->source = htons(pkt_dev->cur_udp_src);
2724 udph->dest = htons(pkt_dev->cur_udp_dst);
2725 udph->len = htons(datalen + sizeof(struct udphdr));
2726 udph->check = 0; /* No checksum */
2728 *(__be32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
2730 if (pkt_dev->traffic_class) {
2731 /* Version + traffic class + flow (0) */
2732 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2735 iph->hop_limit = 32;
2737 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2738 iph->nexthdr = IPPROTO_UDP;
2740 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2741 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2743 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2744 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2745 skb->protocol = protocol;
2747 skb->pkt_type = PACKET_HOST;
2748 skb->nh.ipv6h = iph;
2751 if (pkt_dev->nfrags <= 0)
2752 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2754 int frags = pkt_dev->nfrags;
2757 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2759 if (frags > MAX_SKB_FRAGS)
2760 frags = MAX_SKB_FRAGS;
2761 if (datalen > frags * PAGE_SIZE) {
2762 skb_put(skb, datalen - frags * PAGE_SIZE);
2763 datalen = frags * PAGE_SIZE;
2767 while (datalen > 0) {
2768 struct page *page = alloc_pages(GFP_KERNEL, 0);
2769 skb_shinfo(skb)->frags[i].page = page;
2770 skb_shinfo(skb)->frags[i].page_offset = 0;
2771 skb_shinfo(skb)->frags[i].size =
2772 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2773 datalen -= skb_shinfo(skb)->frags[i].size;
2774 skb->len += skb_shinfo(skb)->frags[i].size;
2775 skb->data_len += skb_shinfo(skb)->frags[i].size;
2777 skb_shinfo(skb)->nr_frags = i;
2786 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2790 skb_shinfo(skb)->frags[i - 1].size -= rem;
2792 skb_shinfo(skb)->frags[i] =
2793 skb_shinfo(skb)->frags[i - 1];
2794 get_page(skb_shinfo(skb)->frags[i].page);
2795 skb_shinfo(skb)->frags[i].page =
2796 skb_shinfo(skb)->frags[i - 1].page;
2797 skb_shinfo(skb)->frags[i].page_offset +=
2798 skb_shinfo(skb)->frags[i - 1].size;
2799 skb_shinfo(skb)->frags[i].size = rem;
2801 skb_shinfo(skb)->nr_frags = i;
2805 /* Stamp the time, and sequence number, convert them to network byte order */
2806 /* should we update cloned packets too ? */
2808 struct timeval timestamp;
2810 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2811 pgh->seq_num = htonl(pkt_dev->seq_num);
2813 do_gettimeofday(×tamp);
2814 pgh->tv_sec = htonl(timestamp.tv_sec);
2815 pgh->tv_usec = htonl(timestamp.tv_usec);
2817 /* pkt_dev->seq_num++; FF: you really mean this? */
2822 static inline struct sk_buff *fill_packet(struct net_device *odev,
2823 struct pktgen_dev *pkt_dev)
2825 if (pkt_dev->flags & F_IPV6)
2826 return fill_packet_ipv6(odev, pkt_dev);
2828 return fill_packet_ipv4(odev, pkt_dev);
2831 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2833 pkt_dev->seq_num = 1;
2834 pkt_dev->idle_acc = 0;
2836 pkt_dev->tx_bytes = 0;
2837 pkt_dev->errors = 0;
2840 /* Set up structure for sending pkts, clear counters */
2842 static void pktgen_run(struct pktgen_thread *t)
2844 struct pktgen_dev *pkt_dev;
2847 pr_debug("pktgen: entering pktgen_run. %p\n", t);
2850 list_for_each_entry(pkt_dev, &t->if_list, list) {
2853 * setup odev and create initial packet.
2855 pktgen_setup_inject(pkt_dev);
2857 if (pkt_dev->odev) {
2858 pktgen_clear_counters(pkt_dev);
2859 pkt_dev->running = 1; /* Cranke yeself! */
2860 pkt_dev->skb = NULL;
2861 pkt_dev->started_at = getCurUs();
2862 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2863 pkt_dev->next_tx_ns = 0;
2865 strcpy(pkt_dev->result, "Starting");
2868 strcpy(pkt_dev->result, "Error starting");
2872 t->control &= ~(T_STOP);
2875 static void pktgen_stop_all_threads_ifs(void)
2877 struct pktgen_thread *t;
2879 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
2881 mutex_lock(&pktgen_thread_lock);
2883 list_for_each_entry(t, &pktgen_threads, th_list)
2884 t->control |= T_STOP;
2886 mutex_unlock(&pktgen_thread_lock);
2889 static int thread_is_running(struct pktgen_thread *t)
2891 struct pktgen_dev *pkt_dev;
2894 list_for_each_entry(pkt_dev, &t->if_list, list)
2895 if (pkt_dev->running) {
2902 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2906 while (thread_is_running(t)) {
2910 msleep_interruptible(100);
2912 if (signal_pending(current))
2922 static int pktgen_wait_all_threads_run(void)
2924 struct pktgen_thread *t;
2927 mutex_lock(&pktgen_thread_lock);
2929 list_for_each_entry(t, &pktgen_threads, th_list) {
2930 sig = pktgen_wait_thread_run(t);
2936 list_for_each_entry(t, &pktgen_threads, th_list)
2937 t->control |= (T_STOP);
2939 mutex_unlock(&pktgen_thread_lock);
2943 static void pktgen_run_all_threads(void)
2945 struct pktgen_thread *t;
2947 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
2949 mutex_lock(&pktgen_thread_lock);
2951 list_for_each_entry(t, &pktgen_threads, th_list)
2952 t->control |= (T_RUN);
2954 mutex_unlock(&pktgen_thread_lock);
2956 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2958 pktgen_wait_all_threads_run();
2961 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2963 __u64 total_us, bps, mbps, pps, idle;
2964 char *p = pkt_dev->result;
2966 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2968 idle = pkt_dev->idle_acc;
2970 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2971 (unsigned long long)total_us,
2972 (unsigned long long)(total_us - idle),
2973 (unsigned long long)idle,
2974 (unsigned long long)pkt_dev->sofar,
2975 pkt_dev->cur_pkt_size, nr_frags);
2977 pps = pkt_dev->sofar * USEC_PER_SEC;
2979 while ((total_us >> 32) != 0) {
2984 do_div(pps, total_us);
2986 bps = pps * 8 * pkt_dev->cur_pkt_size;
2989 do_div(mbps, 1000000);
2990 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2991 (unsigned long long)pps,
2992 (unsigned long long)mbps,
2993 (unsigned long long)bps,
2994 (unsigned long long)pkt_dev->errors);
2997 /* Set stopped-at timer, remove from running list, do counters & statistics */
2999 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3001 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3003 if (!pkt_dev->running) {
3004 printk("pktgen: interface: %s is already stopped\n",
3009 pkt_dev->stopped_at = getCurUs();
3010 pkt_dev->running = 0;
3012 show_results(pkt_dev, nr_frags);
3017 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3019 struct pktgen_dev *pkt_dev, *best = NULL;
3023 list_for_each_entry(pkt_dev, &t->if_list, list) {
3024 if (!pkt_dev->running)
3028 else if (pkt_dev->next_tx_us < best->next_tx_us)
3035 static void pktgen_stop(struct pktgen_thread *t)
3037 struct pktgen_dev *pkt_dev;
3039 pr_debug("pktgen: entering pktgen_stop\n");
3043 list_for_each_entry(pkt_dev, &t->if_list, list) {
3044 pktgen_stop_device(pkt_dev);
3046 kfree_skb(pkt_dev->skb);
3048 pkt_dev->skb = NULL;
3055 * one of our devices needs to be removed - find it
3058 static void pktgen_rem_one_if(struct pktgen_thread *t)
3060 struct list_head *q, *n;
3061 struct pktgen_dev *cur;
3063 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3067 list_for_each_safe(q, n, &t->if_list) {
3068 cur = list_entry(q, struct pktgen_dev, list);
3070 if (!cur->removal_mark)
3074 kfree_skb(cur->skb);
3077 pktgen_remove_device(t, cur);
3085 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3087 struct list_head *q, *n;
3088 struct pktgen_dev *cur;
3090 /* Remove all devices, free mem */
3092 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3095 list_for_each_safe(q, n, &t->if_list) {
3096 cur = list_entry(q, struct pktgen_dev, list);
3099 kfree_skb(cur->skb);
3102 pktgen_remove_device(t, cur);
3108 static void pktgen_rem_thread(struct pktgen_thread *t)
3110 /* Remove from the thread list */
3112 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3114 mutex_lock(&pktgen_thread_lock);
3116 list_del(&t->th_list);
3118 mutex_unlock(&pktgen_thread_lock);
3121 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3123 struct net_device *odev = NULL;
3124 __u64 idle_start = 0;
3127 odev = pkt_dev->odev;
3129 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3133 if (now < pkt_dev->next_tx_us)
3134 spin(pkt_dev, pkt_dev->next_tx_us);
3136 /* This is max DELAY, this has special meaning of
3139 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3140 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3141 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3146 if (netif_queue_stopped(odev) || need_resched()) {
3147 idle_start = getCurUs();
3149 if (!netif_running(odev)) {
3150 pktgen_stop_device(pkt_dev);
3152 kfree_skb(pkt_dev->skb);
3153 pkt_dev->skb = NULL;
3159 pkt_dev->idle_acc += getCurUs() - idle_start;
3161 if (netif_queue_stopped(odev)) {
3162 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3163 pkt_dev->next_tx_ns = 0;
3164 goto out; /* Try the next interface */
3168 if (pkt_dev->last_ok || !pkt_dev->skb) {
3169 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3170 || (!pkt_dev->skb)) {
3171 /* build a new pkt */
3173 kfree_skb(pkt_dev->skb);
3175 pkt_dev->skb = fill_packet(odev, pkt_dev);
3176 if (pkt_dev->skb == NULL) {
3177 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
3179 pkt_dev->clone_count--; /* back out increment, OOM */
3182 pkt_dev->allocated_skbs++;
3183 pkt_dev->clone_count = 0; /* reset counter */
3187 netif_tx_lock_bh(odev);
3188 if (!netif_queue_stopped(odev)) {
3190 atomic_inc(&(pkt_dev->skb->users));
3192 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3193 if (likely(ret == NETDEV_TX_OK)) {
3194 pkt_dev->last_ok = 1;
3197 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3199 } else if (ret == NETDEV_TX_LOCKED
3200 && (odev->features & NETIF_F_LLTX)) {
3203 } else { /* Retry it next time */
3205 atomic_dec(&(pkt_dev->skb->users));
3207 if (debug && net_ratelimit())
3208 printk(KERN_INFO "pktgen: Hard xmit error\n");
3211 pkt_dev->last_ok = 0;
3214 pkt_dev->next_tx_us = getCurUs();
3215 pkt_dev->next_tx_ns = 0;
3217 pkt_dev->next_tx_us += pkt_dev->delay_us;
3218 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3220 if (pkt_dev->next_tx_ns > 1000) {
3221 pkt_dev->next_tx_us++;
3222 pkt_dev->next_tx_ns -= 1000;
3226 else { /* Retry it next time */
3227 pkt_dev->last_ok = 0;
3228 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3229 pkt_dev->next_tx_ns = 0;
3232 netif_tx_unlock_bh(odev);
3234 /* If pkt_dev->count is zero, then run forever */
3235 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3236 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3237 idle_start = getCurUs();
3238 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3239 if (signal_pending(current)) {
3244 pkt_dev->idle_acc += getCurUs() - idle_start;
3247 /* Done with this */
3248 pktgen_stop_device(pkt_dev);
3250 kfree_skb(pkt_dev->skb);
3251 pkt_dev->skb = NULL;
3257 * Main loop of the thread goes here
3260 static int pktgen_thread_worker(void *arg)
3263 struct pktgen_thread *t = arg;
3264 struct pktgen_dev *pkt_dev = NULL;
3266 u32 max_before_softirq;
3267 u32 tx_since_softirq = 0;
3269 BUG_ON(smp_processor_id() != cpu);
3271 init_waitqueue_head(&t->queue);
3273 t->pid = current->pid;
3275 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid);
3277 max_before_softirq = t->max_before_softirq;
3279 set_current_state(TASK_INTERRUPTIBLE);
3281 while (!kthread_should_stop()) {
3282 pkt_dev = next_to_run(t);
3285 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3287 prepare_to_wait(&(t->queue), &wait,
3288 TASK_INTERRUPTIBLE);
3289 schedule_timeout(HZ / 10);
3290 finish_wait(&(t->queue), &wait);
3293 __set_current_state(TASK_RUNNING);
3297 pktgen_xmit(pkt_dev);
3300 * We like to stay RUNNING but must also give
3301 * others fair share.
3304 tx_since_softirq += pkt_dev->last_ok;
3306 if (tx_since_softirq > max_before_softirq) {
3307 if (local_softirq_pending())
3309 tx_since_softirq = 0;
3313 if (t->control & T_STOP) {
3315 t->control &= ~(T_STOP);
3318 if (t->control & T_RUN) {
3320 t->control &= ~(T_RUN);
3323 if (t->control & T_REMDEVALL) {
3324 pktgen_rem_all_ifs(t);
3325 t->control &= ~(T_REMDEVALL);
3328 if (t->control & T_REMDEV) {
3329 pktgen_rem_one_if(t);
3330 t->control &= ~(T_REMDEV);
3335 set_current_state(TASK_INTERRUPTIBLE);
3338 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3341 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3342 pktgen_rem_all_ifs(t);
3344 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3345 pktgen_rem_thread(t);
3350 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3353 struct pktgen_dev *p, *pkt_dev = NULL;
3356 list_for_each_entry(p, &t->if_list, list)
3357 if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
3363 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3368 * Adds a dev at front of if_list.
3371 static int add_dev_to_thread(struct pktgen_thread *t,
3372 struct pktgen_dev *pkt_dev)
3378 if (pkt_dev->pg_thread) {
3379 printk("pktgen: ERROR: already assigned to a thread.\n");
3384 list_add(&pkt_dev->list, &t->if_list);
3385 pkt_dev->pg_thread = t;
3386 pkt_dev->running = 0;
3393 /* Called under thread lock */
3395 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3397 struct pktgen_dev *pkt_dev;
3398 struct proc_dir_entry *pe;
3400 /* We don't allow a device to be on several threads */
3402 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3404 printk("pktgen: ERROR: interface already used.\n");
3408 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3412 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3413 if (pkt_dev->flows == NULL) {
3417 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3419 pkt_dev->removal_mark = 0;
3420 pkt_dev->min_pkt_size = ETH_ZLEN;
3421 pkt_dev->max_pkt_size = ETH_ZLEN;
3422 pkt_dev->nfrags = 0;
3423 pkt_dev->clone_skb = pg_clone_skb_d;
3424 pkt_dev->delay_us = pg_delay_d / 1000;
3425 pkt_dev->delay_ns = pg_delay_d % 1000;
3426 pkt_dev->count = pg_count_d;
3428 pkt_dev->udp_src_min = 9; /* sink port */
3429 pkt_dev->udp_src_max = 9;
3430 pkt_dev->udp_dst_min = 9;
3431 pkt_dev->udp_dst_max = 9;
3433 pkt_dev->vlan_p = 0;
3434 pkt_dev->vlan_cfi = 0;
3435 pkt_dev->vlan_id = 0xffff;
3436 pkt_dev->svlan_p = 0;
3437 pkt_dev->svlan_cfi = 0;
3438 pkt_dev->svlan_id = 0xffff;
3440 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
3442 if (!pktgen_setup_dev(pkt_dev)) {
3443 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
3445 vfree(pkt_dev->flows);
3450 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
3452 printk("pktgen: cannot create %s/%s procfs entry.\n",
3453 PG_PROC_DIR, ifname);
3455 vfree(pkt_dev->flows);
3459 pe->proc_fops = &pktgen_if_fops;
3462 return add_dev_to_thread(t, pkt_dev);
3465 static int __init pktgen_create_thread(int cpu)
3467 struct pktgen_thread *t;
3468 struct proc_dir_entry *pe;
3469 struct task_struct *p;
3471 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3473 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3477 spin_lock_init(&t->if_lock);
3480 INIT_LIST_HEAD(&t->if_list);
3482 list_add_tail(&t->th_list, &pktgen_threads);
3484 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3486 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3487 list_del(&t->th_list);
3491 kthread_bind(p, cpu);
3494 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3496 printk("pktgen: cannot create %s/%s procfs entry.\n",
3497 PG_PROC_DIR, t->tsk->comm);
3499 list_del(&t->th_list);
3504 pe->proc_fops = &pktgen_thread_fops;
3513 * Removes a device from the thread if_list.
3515 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3516 struct pktgen_dev *pkt_dev)
3518 struct list_head *q, *n;
3519 struct pktgen_dev *p;
3521 list_for_each_safe(q, n, &t->if_list) {
3522 p = list_entry(q, struct pktgen_dev, list);
3528 static int pktgen_remove_device(struct pktgen_thread *t,
3529 struct pktgen_dev *pkt_dev)
3532 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3534 if (pkt_dev->running) {
3535 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3536 pktgen_stop_device(pkt_dev);
3539 /* Dis-associate from the interface */
3541 if (pkt_dev->odev) {
3542 dev_put(pkt_dev->odev);
3543 pkt_dev->odev = NULL;
3546 /* And update the thread if_list */
3548 _rem_dev_from_if_list(t, pkt_dev);
3550 /* Clean up proc file system */
3552 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
3555 vfree(pkt_dev->flows);
3560 static int __init pg_init(void)
3563 struct proc_dir_entry *pe;
3567 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3570 pg_proc_dir->owner = THIS_MODULE;
3572 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3574 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3576 proc_net_remove(PG_PROC_DIR);
3580 pe->proc_fops = &pktgen_fops;
3583 /* Register us to receive netdevice events */
3584 register_netdevice_notifier(&pktgen_notifier_block);
3586 for_each_online_cpu(cpu) {
3589 err = pktgen_create_thread(cpu);
3591 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3595 if (list_empty(&pktgen_threads)) {
3596 printk("pktgen: ERROR: Initialization failed for all threads\n");
3597 unregister_netdevice_notifier(&pktgen_notifier_block);
3598 remove_proc_entry(PGCTRL, pg_proc_dir);
3599 proc_net_remove(PG_PROC_DIR);
3606 static void __exit pg_cleanup(void)
3608 struct pktgen_thread *t;
3609 struct list_head *q, *n;
3610 wait_queue_head_t queue;
3611 init_waitqueue_head(&queue);
3613 /* Stop all interfaces & threads */
3615 list_for_each_safe(q, n, &pktgen_threads) {
3616 t = list_entry(q, struct pktgen_thread, th_list);
3617 kthread_stop(t->tsk);
3621 /* Un-register us from receiving netdevice events */
3622 unregister_netdevice_notifier(&pktgen_notifier_block);
3624 /* Clean up proc file system */
3625 remove_proc_entry(PGCTRL, pg_proc_dir);
3626 proc_net_remove(PG_PROC_DIR);
3629 module_init(pg_init);
3630 module_exit(pg_cleanup);
3632 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3633 MODULE_DESCRIPTION("Packet Generator tool");
3634 MODULE_LICENSE("GPL");
3635 module_param(pg_count_d, int, 0);
3636 module_param(pg_delay_d, int, 0);
3637 module_param(pg_clone_skb_d, int, 0);
3638 module_param(debug, int, 0);