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>
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/freezer.h>
135 #include <linux/delay.h>
136 #include <linux/timer.h>
137 #include <linux/list.h>
138 #include <linux/init.h>
139 #include <linux/skbuff.h>
140 #include <linux/netdevice.h>
141 #include <linux/inet.h>
142 #include <linux/inetdevice.h>
143 #include <linux/rtnetlink.h>
144 #include <linux/if_arp.h>
145 #include <linux/if_vlan.h>
146 #include <linux/in.h>
147 #include <linux/ip.h>
148 #include <linux/ipv6.h>
149 #include <linux/udp.h>
150 #include <linux/proc_fs.h>
151 #include <linux/seq_file.h>
152 #include <linux/wait.h>
153 #include <linux/etherdevice.h>
154 #include <linux/kthread.h>
155 #include <net/net_namespace.h>
156 #include <net/checksum.h>
157 #include <net/ipv6.h>
158 #include <net/addrconf.h>
160 #include <net/xfrm.h>
162 #include <asm/byteorder.h>
163 #include <linux/rcupdate.h>
164 #include <linux/bitops.h>
167 #include <asm/uaccess.h>
168 #include <asm/div64.h> /* do_div */
169 #include <asm/timex.h>
171 #define VERSION "pktgen v2.69: Packet Generator for packet performance testing.\n"
173 /* The buckets are exponential in 'width' */
174 #define LAT_BUCKETS_MAX 32
175 #define IP_NAME_SZ 32
176 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
177 #define MPLS_STACK_BOTTOM htonl(0x00000100)
179 /* Device flag bits */
180 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
181 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
182 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
183 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
184 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
185 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
186 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
187 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
188 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
189 #define F_VID_RND (1<<9) /* Random VLAN ID */
190 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
191 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
192 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
193 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
195 /* Thread control flag bits */
196 #define T_TERMINATE (1<<0)
197 #define T_STOP (1<<1) /* Stop run */
198 #define T_RUN (1<<2) /* Start run */
199 #define T_REMDEVALL (1<<3) /* Remove all devs */
200 #define T_REMDEV (1<<4) /* Remove one dev */
202 /* If lock -- can be removed after some work */
203 #define if_lock(t) spin_lock(&(t->if_lock));
204 #define if_unlock(t) spin_unlock(&(t->if_lock));
206 /* Used to help with determining the pkts on receive */
207 #define PKTGEN_MAGIC 0xbe9be955
208 #define PG_PROC_DIR "pktgen"
209 #define PGCTRL "pgctrl"
210 static struct proc_dir_entry *pg_proc_dir = NULL;
212 #define MAX_CFLOWS 65536
214 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
215 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
221 struct xfrm_state *x;
227 #define F_INIT (1<<0) /* flow has been initialized */
231 * Try to keep frequent/infrequent used vars. separated.
233 struct proc_dir_entry *entry; /* proc file */
234 struct pktgen_thread *pg_thread;/* the owner */
235 struct list_head list; /* Used for chaining in the thread's run-queue */
237 int running; /* if this changes to false, the test will stop */
239 /* If min != max, then we will either do a linear iteration, or
240 * we will do a random selection from within the range.
243 int removal_mark; /* non-zero => the device is marked for
244 * removal by worker thread */
246 int min_pkt_size; /* = ETH_ZLEN; */
247 int max_pkt_size; /* = ETH_ZLEN; */
248 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
250 __u32 delay_us; /* Default delay */
252 __u64 count; /* Default No packets to send */
253 __u64 sofar; /* How many pkts we've sent so far */
254 __u64 tx_bytes; /* How many bytes we've transmitted */
255 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
257 /* runtime counters relating to clone_skb */
258 __u64 next_tx_us; /* timestamp of when to tx next */
261 __u64 allocated_skbs;
263 int last_ok; /* Was last skb sent?
264 * Or a failed transmit of some sort? This will keep
265 * sequence numbers in order, for example.
267 __u64 started_at; /* micro-seconds */
268 __u64 stopped_at; /* micro-seconds */
269 __u64 idle_acc; /* micro-seconds */
272 int clone_skb; /* Use multiple SKBs during packet gen. If this number
273 * is greater than 1, then that many copies of the same
274 * packet will be sent before a new packet is allocated.
275 * For instance, if you want to send 1024 identical packets
276 * before creating a new packet, set clone_skb to 1024.
279 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
280 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
281 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 struct in6_addr in6_saddr;
285 struct in6_addr in6_daddr;
286 struct in6_addr cur_in6_daddr;
287 struct in6_addr cur_in6_saddr;
289 struct in6_addr min_in6_daddr;
290 struct in6_addr max_in6_daddr;
291 struct in6_addr min_in6_saddr;
292 struct in6_addr max_in6_saddr;
294 /* If we're doing ranges, random or incremental, then this
295 * defines the min/max for those ranges.
297 __be32 saddr_min; /* inclusive, source IP address */
298 __be32 saddr_max; /* exclusive, source IP address */
299 __be32 daddr_min; /* inclusive, dest IP address */
300 __be32 daddr_max; /* exclusive, dest IP address */
302 __u16 udp_src_min; /* inclusive, source UDP port */
303 __u16 udp_src_max; /* exclusive, source UDP port */
304 __u16 udp_dst_min; /* inclusive, dest UDP port */
305 __u16 udp_dst_max; /* exclusive, dest UDP port */
308 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
309 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
312 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
313 __be32 labels[MAX_MPLS_LABELS];
315 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
318 __u16 vlan_id; /* 0xffff means no vlan tag */
322 __u16 svlan_id; /* 0xffff means no svlan tag */
324 __u32 src_mac_count; /* How many MACs to iterate through */
325 __u32 dst_mac_count; /* How many MACs to iterate through */
327 unsigned char dst_mac[ETH_ALEN];
328 unsigned char src_mac[ETH_ALEN];
330 __u32 cur_dst_mac_offset;
331 __u32 cur_src_mac_offset;
341 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
343 We fill in SRC address later
344 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
348 __u16 pad; /* pad out the hh struct to an even 16 bytes */
350 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
351 * are transmitting the same one multiple times
353 struct net_device *odev; /* The out-going device. Note that the device should
354 * have it's pg_info pointer pointing back to this
355 * device. This will be set when the user specifies
356 * the out-going device name (not when the inject is
357 * started as it used to do.)
359 struct flow_state *flows;
360 unsigned cflows; /* Concurrent flows (config) */
361 unsigned lflow; /* Flow length (config) */
362 unsigned nflows; /* accumulated flows (stats) */
363 unsigned curfl; /* current sequenced flow (state)*/
369 __u8 ipsmode; /* IPSEC mode (config) */
370 __u8 ipsproto; /* IPSEC type (config) */
382 struct pktgen_thread {
384 struct list_head if_list; /* All device here */
385 struct list_head th_list;
386 struct task_struct *tsk;
389 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
394 wait_queue_head_t queue;
400 /* This code works around the fact that do_div cannot handle two 64-bit
401 numbers, and regular 64-bit division doesn't work on x86 kernels.
407 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
408 * Function copied/adapted/optimized from:
410 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
412 * Copyright 1994, University of Cambridge Computer Laboratory
413 * All Rights Reserved.
416 static inline s64 divremdi3(s64 x, s64 y, int type)
418 u64 a = (x < 0) ? -x : x;
419 u64 b = (y < 0) ? -y : y;
439 if (PG_DIV == type) {
440 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
442 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
446 /* End of hacks to deal with 64-bit math on x86 */
448 /** Convert to milliseconds */
449 static inline __u64 tv_to_ms(const struct timeval *tv)
451 __u64 ms = tv->tv_usec / 1000;
452 ms += (__u64) tv->tv_sec * (__u64) 1000;
456 /** Convert to micro-seconds */
457 static inline __u64 tv_to_us(const struct timeval *tv)
459 __u64 us = tv->tv_usec;
460 us += (__u64) tv->tv_sec * (__u64) 1000000;
464 static inline __u64 pg_div(__u64 n, __u32 base)
468 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
473 static inline __u64 pg_div64(__u64 n, __u64 base)
477 * How do we know if the architecture we are running on
478 * supports division with 64 bit base?
481 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
485 tmp = divremdi3(n, base, PG_DIV);
490 static inline __u64 getCurMs(void)
493 do_gettimeofday(&tv);
494 return tv_to_ms(&tv);
497 static inline __u64 getCurUs(void)
500 do_gettimeofday(&tv);
501 return tv_to_us(&tv);
504 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
506 return tv_to_us(a) - tv_to_us(b);
509 /* old include end */
511 static char version[] __initdata = VERSION;
513 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
514 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
515 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
517 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
518 static void pktgen_run_all_threads(void);
519 static void pktgen_stop_all_threads_ifs(void);
520 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
521 static void pktgen_stop(struct pktgen_thread *t);
522 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
524 static unsigned int scan_ip6(const char *s, char ip[16]);
525 static unsigned int fmt_ip6(char *s, const char ip[16]);
527 /* Module parameters, defaults. */
528 static int pg_count_d = 1000; /* 1000 pkts by default */
529 static int pg_delay_d;
530 static int pg_clone_skb_d;
533 static DEFINE_MUTEX(pktgen_thread_lock);
534 static LIST_HEAD(pktgen_threads);
536 static struct notifier_block pktgen_notifier_block = {
537 .notifier_call = pktgen_device_event,
541 * /proc handling functions
545 static int pgctrl_show(struct seq_file *seq, void *v)
547 seq_puts(seq, VERSION);
551 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
552 size_t count, loff_t * ppos)
557 if (!capable(CAP_NET_ADMIN)) {
562 if (count > sizeof(data))
563 count = sizeof(data);
565 if (copy_from_user(data, buf, count)) {
569 data[count - 1] = 0; /* Make string */
571 if (!strcmp(data, "stop"))
572 pktgen_stop_all_threads_ifs();
574 else if (!strcmp(data, "start"))
575 pktgen_run_all_threads();
578 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
586 static int pgctrl_open(struct inode *inode, struct file *file)
588 return single_open(file, pgctrl_show, PDE(inode)->data);
591 static const struct file_operations pktgen_fops = {
592 .owner = THIS_MODULE,
596 .write = pgctrl_write,
597 .release = single_release,
600 static int pktgen_if_show(struct seq_file *seq, void *v)
602 struct pktgen_dev *pkt_dev = seq->private;
605 __u64 now = getCurUs();
606 DECLARE_MAC_BUF(mac);
609 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
610 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
611 pkt_dev->max_pkt_size);
614 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
616 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
617 pkt_dev->clone_skb, pkt_dev->odev->name);
619 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
623 " queue_map_min: %u queue_map_max: %u\n",
624 pkt_dev->queue_map_min,
625 pkt_dev->queue_map_max);
627 if (pkt_dev->flags & F_IPV6) {
628 char b1[128], b2[128], b3[128];
629 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
630 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
631 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
633 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
636 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
637 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
638 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
640 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
645 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
646 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
649 seq_puts(seq, " src_mac: ");
651 seq_printf(seq, "%s ",
652 print_mac(mac, is_zero_ether_addr(pkt_dev->src_mac) ?
653 pkt_dev->odev->dev_addr : pkt_dev->src_mac));
655 seq_printf(seq, "dst_mac: ");
656 seq_printf(seq, "%s\n", print_mac(mac, pkt_dev->dst_mac));
659 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
660 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
661 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
664 " src_mac_count: %d dst_mac_count: %d\n",
665 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
667 if (pkt_dev->nr_labels) {
669 seq_printf(seq, " mpls: ");
670 for (i = 0; i < pkt_dev->nr_labels; i++)
671 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
672 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
675 if (pkt_dev->vlan_id != 0xffff) {
676 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
677 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
680 if (pkt_dev->svlan_id != 0xffff) {
681 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
682 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
686 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
689 if (pkt_dev->traffic_class) {
690 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
693 seq_printf(seq, " Flags: ");
695 if (pkt_dev->flags & F_IPV6)
696 seq_printf(seq, "IPV6 ");
698 if (pkt_dev->flags & F_IPSRC_RND)
699 seq_printf(seq, "IPSRC_RND ");
701 if (pkt_dev->flags & F_IPDST_RND)
702 seq_printf(seq, "IPDST_RND ");
704 if (pkt_dev->flags & F_TXSIZE_RND)
705 seq_printf(seq, "TXSIZE_RND ");
707 if (pkt_dev->flags & F_UDPSRC_RND)
708 seq_printf(seq, "UDPSRC_RND ");
710 if (pkt_dev->flags & F_UDPDST_RND)
711 seq_printf(seq, "UDPDST_RND ");
713 if (pkt_dev->flags & F_MPLS_RND)
714 seq_printf(seq, "MPLS_RND ");
716 if (pkt_dev->flags & F_QUEUE_MAP_RND)
717 seq_printf(seq, "QUEUE_MAP_RND ");
719 if (pkt_dev->cflows) {
720 if (pkt_dev->flags & F_FLOW_SEQ)
721 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
723 seq_printf(seq, "FLOW_RND ");
727 if (pkt_dev->flags & F_IPSEC_ON)
728 seq_printf(seq, "IPSEC ");
731 if (pkt_dev->flags & F_MACSRC_RND)
732 seq_printf(seq, "MACSRC_RND ");
734 if (pkt_dev->flags & F_MACDST_RND)
735 seq_printf(seq, "MACDST_RND ");
737 if (pkt_dev->flags & F_VID_RND)
738 seq_printf(seq, "VID_RND ");
740 if (pkt_dev->flags & F_SVID_RND)
741 seq_printf(seq, "SVID_RND ");
745 sa = pkt_dev->started_at;
746 stopped = pkt_dev->stopped_at;
747 if (pkt_dev->running)
748 stopped = now; /* not really stopped, more like last-running-at */
751 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
752 (unsigned long long)pkt_dev->sofar,
753 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
754 (unsigned long long)stopped,
755 (unsigned long long)pkt_dev->idle_acc);
758 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
759 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
760 pkt_dev->cur_src_mac_offset);
762 if (pkt_dev->flags & F_IPV6) {
763 char b1[128], b2[128];
764 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
765 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
766 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
768 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
769 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
771 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
772 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
774 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
776 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
778 if (pkt_dev->result[0])
779 seq_printf(seq, "Result: %s\n", pkt_dev->result);
781 seq_printf(seq, "Result: Idle\n");
787 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
792 for (; i < maxlen; i++) {
795 if (get_user(c, &user_buffer[i]))
797 if ((c >= '0') && (c <= '9'))
799 else if ((c >= 'a') && (c <= 'f'))
800 *num |= c - 'a' + 10;
801 else if ((c >= 'A') && (c <= 'F'))
802 *num |= c - 'A' + 10;
809 static int count_trail_chars(const char __user * user_buffer,
814 for (i = 0; i < maxlen; i++) {
816 if (get_user(c, &user_buffer[i]))
834 static unsigned long num_arg(const char __user * user_buffer,
835 unsigned long maxlen, unsigned long *num)
840 for (; i < maxlen; i++) {
842 if (get_user(c, &user_buffer[i]))
844 if ((c >= '0') && (c <= '9')) {
853 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
857 for (; i < maxlen; i++) {
859 if (get_user(c, &user_buffer[i]))
877 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
884 pkt_dev->nr_labels = 0;
887 len = hex32_arg(&buffer[i], 8, &tmp);
890 pkt_dev->labels[n] = htonl(tmp);
891 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
892 pkt_dev->flags |= F_MPLS_RND;
894 if (get_user(c, &buffer[i]))
898 if (n >= MAX_MPLS_LABELS)
902 pkt_dev->nr_labels = n;
906 static ssize_t pktgen_if_write(struct file *file,
907 const char __user * user_buffer, size_t count,
910 struct seq_file *seq = (struct seq_file *)file->private_data;
911 struct pktgen_dev *pkt_dev = seq->private;
913 char name[16], valstr[32];
914 unsigned long value = 0;
915 char *pg_result = NULL;
919 pg_result = &(pkt_dev->result[0]);
922 printk(KERN_WARNING "pktgen: wrong command format\n");
927 tmp = count_trail_chars(&user_buffer[i], max);
929 printk(KERN_WARNING "pktgen: illegal format\n");
934 /* Read variable name */
936 len = strn_len(&user_buffer[i], sizeof(name) - 1);
940 memset(name, 0, sizeof(name));
941 if (copy_from_user(name, &user_buffer[i], len))
946 len = count_trail_chars(&user_buffer[i], max);
954 if (copy_from_user(tb, user_buffer, count))
957 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
958 (unsigned long)count, tb);
961 if (!strcmp(name, "min_pkt_size")) {
962 len = num_arg(&user_buffer[i], 10, &value);
967 if (value < 14 + 20 + 8)
969 if (value != pkt_dev->min_pkt_size) {
970 pkt_dev->min_pkt_size = value;
971 pkt_dev->cur_pkt_size = value;
973 sprintf(pg_result, "OK: min_pkt_size=%u",
974 pkt_dev->min_pkt_size);
978 if (!strcmp(name, "max_pkt_size")) {
979 len = num_arg(&user_buffer[i], 10, &value);
984 if (value < 14 + 20 + 8)
986 if (value != pkt_dev->max_pkt_size) {
987 pkt_dev->max_pkt_size = value;
988 pkt_dev->cur_pkt_size = value;
990 sprintf(pg_result, "OK: max_pkt_size=%u",
991 pkt_dev->max_pkt_size);
995 /* Shortcut for min = max */
997 if (!strcmp(name, "pkt_size")) {
998 len = num_arg(&user_buffer[i], 10, &value);
1003 if (value < 14 + 20 + 8)
1004 value = 14 + 20 + 8;
1005 if (value != pkt_dev->min_pkt_size) {
1006 pkt_dev->min_pkt_size = value;
1007 pkt_dev->max_pkt_size = value;
1008 pkt_dev->cur_pkt_size = value;
1010 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
1014 if (!strcmp(name, "debug")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1021 sprintf(pg_result, "OK: debug=%u", debug);
1025 if (!strcmp(name, "frags")) {
1026 len = num_arg(&user_buffer[i], 10, &value);
1031 pkt_dev->nfrags = value;
1032 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
1035 if (!strcmp(name, "delay")) {
1036 len = num_arg(&user_buffer[i], 10, &value);
1041 if (value == 0x7FFFFFFF) {
1042 pkt_dev->delay_us = 0x7FFFFFFF;
1043 pkt_dev->delay_ns = 0;
1045 pkt_dev->delay_us = value / 1000;
1046 pkt_dev->delay_ns = value % 1000;
1048 sprintf(pg_result, "OK: delay=%u",
1049 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1052 if (!strcmp(name, "udp_src_min")) {
1053 len = num_arg(&user_buffer[i], 10, &value);
1058 if (value != pkt_dev->udp_src_min) {
1059 pkt_dev->udp_src_min = value;
1060 pkt_dev->cur_udp_src = value;
1062 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1065 if (!strcmp(name, "udp_dst_min")) {
1066 len = num_arg(&user_buffer[i], 10, &value);
1071 if (value != pkt_dev->udp_dst_min) {
1072 pkt_dev->udp_dst_min = value;
1073 pkt_dev->cur_udp_dst = value;
1075 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1078 if (!strcmp(name, "udp_src_max")) {
1079 len = num_arg(&user_buffer[i], 10, &value);
1084 if (value != pkt_dev->udp_src_max) {
1085 pkt_dev->udp_src_max = value;
1086 pkt_dev->cur_udp_src = value;
1088 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1091 if (!strcmp(name, "udp_dst_max")) {
1092 len = num_arg(&user_buffer[i], 10, &value);
1097 if (value != pkt_dev->udp_dst_max) {
1098 pkt_dev->udp_dst_max = value;
1099 pkt_dev->cur_udp_dst = value;
1101 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1104 if (!strcmp(name, "clone_skb")) {
1105 len = num_arg(&user_buffer[i], 10, &value);
1110 pkt_dev->clone_skb = value;
1112 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1115 if (!strcmp(name, "count")) {
1116 len = num_arg(&user_buffer[i], 10, &value);
1121 pkt_dev->count = value;
1122 sprintf(pg_result, "OK: count=%llu",
1123 (unsigned long long)pkt_dev->count);
1126 if (!strcmp(name, "src_mac_count")) {
1127 len = num_arg(&user_buffer[i], 10, &value);
1132 if (pkt_dev->src_mac_count != value) {
1133 pkt_dev->src_mac_count = value;
1134 pkt_dev->cur_src_mac_offset = 0;
1136 sprintf(pg_result, "OK: src_mac_count=%d",
1137 pkt_dev->src_mac_count);
1140 if (!strcmp(name, "dst_mac_count")) {
1141 len = num_arg(&user_buffer[i], 10, &value);
1146 if (pkt_dev->dst_mac_count != value) {
1147 pkt_dev->dst_mac_count = value;
1148 pkt_dev->cur_dst_mac_offset = 0;
1150 sprintf(pg_result, "OK: dst_mac_count=%d",
1151 pkt_dev->dst_mac_count);
1154 if (!strcmp(name, "flag")) {
1157 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1161 if (copy_from_user(f, &user_buffer[i], len))
1164 if (strcmp(f, "IPSRC_RND") == 0)
1165 pkt_dev->flags |= F_IPSRC_RND;
1167 else if (strcmp(f, "!IPSRC_RND") == 0)
1168 pkt_dev->flags &= ~F_IPSRC_RND;
1170 else if (strcmp(f, "TXSIZE_RND") == 0)
1171 pkt_dev->flags |= F_TXSIZE_RND;
1173 else if (strcmp(f, "!TXSIZE_RND") == 0)
1174 pkt_dev->flags &= ~F_TXSIZE_RND;
1176 else if (strcmp(f, "IPDST_RND") == 0)
1177 pkt_dev->flags |= F_IPDST_RND;
1179 else if (strcmp(f, "!IPDST_RND") == 0)
1180 pkt_dev->flags &= ~F_IPDST_RND;
1182 else if (strcmp(f, "UDPSRC_RND") == 0)
1183 pkt_dev->flags |= F_UDPSRC_RND;
1185 else if (strcmp(f, "!UDPSRC_RND") == 0)
1186 pkt_dev->flags &= ~F_UDPSRC_RND;
1188 else if (strcmp(f, "UDPDST_RND") == 0)
1189 pkt_dev->flags |= F_UDPDST_RND;
1191 else if (strcmp(f, "!UDPDST_RND") == 0)
1192 pkt_dev->flags &= ~F_UDPDST_RND;
1194 else if (strcmp(f, "MACSRC_RND") == 0)
1195 pkt_dev->flags |= F_MACSRC_RND;
1197 else if (strcmp(f, "!MACSRC_RND") == 0)
1198 pkt_dev->flags &= ~F_MACSRC_RND;
1200 else if (strcmp(f, "MACDST_RND") == 0)
1201 pkt_dev->flags |= F_MACDST_RND;
1203 else if (strcmp(f, "!MACDST_RND") == 0)
1204 pkt_dev->flags &= ~F_MACDST_RND;
1206 else if (strcmp(f, "MPLS_RND") == 0)
1207 pkt_dev->flags |= F_MPLS_RND;
1209 else if (strcmp(f, "!MPLS_RND") == 0)
1210 pkt_dev->flags &= ~F_MPLS_RND;
1212 else if (strcmp(f, "VID_RND") == 0)
1213 pkt_dev->flags |= F_VID_RND;
1215 else if (strcmp(f, "!VID_RND") == 0)
1216 pkt_dev->flags &= ~F_VID_RND;
1218 else if (strcmp(f, "SVID_RND") == 0)
1219 pkt_dev->flags |= F_SVID_RND;
1221 else if (strcmp(f, "!SVID_RND") == 0)
1222 pkt_dev->flags &= ~F_SVID_RND;
1224 else if (strcmp(f, "FLOW_SEQ") == 0)
1225 pkt_dev->flags |= F_FLOW_SEQ;
1227 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1228 pkt_dev->flags |= F_QUEUE_MAP_RND;
1230 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1231 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1233 else if (strcmp(f, "IPSEC") == 0)
1234 pkt_dev->flags |= F_IPSEC_ON;
1237 else if (strcmp(f, "!IPV6") == 0)
1238 pkt_dev->flags &= ~F_IPV6;
1242 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1244 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1245 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1248 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1251 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1252 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1257 if (copy_from_user(buf, &user_buffer[i], len))
1260 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1261 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1262 strncpy(pkt_dev->dst_min, buf, len);
1263 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1264 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1267 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1270 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1273 if (!strcmp(name, "dst_max")) {
1274 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1279 if (copy_from_user(buf, &user_buffer[i], len))
1283 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1284 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1285 strncpy(pkt_dev->dst_max, buf, len);
1286 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1287 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1290 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1293 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1296 if (!strcmp(name, "dst6")) {
1297 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1301 pkt_dev->flags |= F_IPV6;
1303 if (copy_from_user(buf, &user_buffer[i], len))
1307 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1308 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1310 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1313 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1316 sprintf(pg_result, "OK: dst6=%s", buf);
1319 if (!strcmp(name, "dst6_min")) {
1320 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1324 pkt_dev->flags |= F_IPV6;
1326 if (copy_from_user(buf, &user_buffer[i], len))
1330 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1331 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1333 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1334 &pkt_dev->min_in6_daddr);
1336 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1339 sprintf(pg_result, "OK: dst6_min=%s", buf);
1342 if (!strcmp(name, "dst6_max")) {
1343 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1347 pkt_dev->flags |= F_IPV6;
1349 if (copy_from_user(buf, &user_buffer[i], len))
1353 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1354 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1357 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1360 sprintf(pg_result, "OK: dst6_max=%s", buf);
1363 if (!strcmp(name, "src6")) {
1364 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1368 pkt_dev->flags |= F_IPV6;
1370 if (copy_from_user(buf, &user_buffer[i], len))
1374 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1375 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1377 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1380 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1383 sprintf(pg_result, "OK: src6=%s", buf);
1386 if (!strcmp(name, "src_min")) {
1387 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1391 if (copy_from_user(buf, &user_buffer[i], len))
1394 if (strcmp(buf, pkt_dev->src_min) != 0) {
1395 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1396 strncpy(pkt_dev->src_min, buf, len);
1397 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1398 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1401 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1404 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1407 if (!strcmp(name, "src_max")) {
1408 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1412 if (copy_from_user(buf, &user_buffer[i], len))
1415 if (strcmp(buf, pkt_dev->src_max) != 0) {
1416 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1417 strncpy(pkt_dev->src_max, buf, len);
1418 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1419 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1422 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1425 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1428 if (!strcmp(name, "dst_mac")) {
1430 unsigned char old_dmac[ETH_ALEN];
1431 unsigned char *m = pkt_dev->dst_mac;
1432 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
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->dst_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 /* Set up Dest MAC */
1463 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1464 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1466 sprintf(pg_result, "OK: dstmac");
1469 if (!strcmp(name, "src_mac")) {
1471 unsigned char old_smac[ETH_ALEN];
1472 unsigned char *m = pkt_dev->src_mac;
1474 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1476 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1480 memset(valstr, 0, sizeof(valstr));
1481 if (copy_from_user(valstr, &user_buffer[i], len))
1485 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1486 if (*v >= '0' && *v <= '9') {
1490 if (*v >= 'A' && *v <= 'F') {
1492 *m += *v - 'A' + 10;
1494 if (*v >= 'a' && *v <= 'f') {
1496 *m += *v - 'a' + 10;
1504 /* Set up Src MAC */
1505 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1506 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1508 sprintf(pg_result, "OK: srcmac");
1512 if (!strcmp(name, "clear_counters")) {
1513 pktgen_clear_counters(pkt_dev);
1514 sprintf(pg_result, "OK: Clearing counters.\n");
1518 if (!strcmp(name, "flows")) {
1519 len = num_arg(&user_buffer[i], 10, &value);
1524 if (value > MAX_CFLOWS)
1527 pkt_dev->cflows = value;
1528 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1532 if (!strcmp(name, "flowlen")) {
1533 len = num_arg(&user_buffer[i], 10, &value);
1538 pkt_dev->lflow = value;
1539 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1543 if (!strcmp(name, "queue_map_min")) {
1544 len = num_arg(&user_buffer[i], 5, &value);
1549 pkt_dev->queue_map_min = value;
1550 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1554 if (!strcmp(name, "queue_map_max")) {
1555 len = num_arg(&user_buffer[i], 5, &value);
1560 pkt_dev->queue_map_max = value;
1561 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1565 if (!strcmp(name, "mpls")) {
1568 len = get_labels(&user_buffer[i], pkt_dev);
1572 cnt = sprintf(pg_result, "OK: mpls=");
1573 for (n = 0; n < pkt_dev->nr_labels; n++)
1574 cnt += sprintf(pg_result + cnt,
1575 "%08x%s", ntohl(pkt_dev->labels[n]),
1576 n == pkt_dev->nr_labels-1 ? "" : ",");
1578 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1579 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1580 pkt_dev->svlan_id = 0xffff;
1583 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1588 if (!strcmp(name, "vlan_id")) {
1589 len = num_arg(&user_buffer[i], 4, &value);
1594 if (value <= 4095) {
1595 pkt_dev->vlan_id = value; /* turn on VLAN */
1598 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1600 if (debug && pkt_dev->nr_labels)
1601 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1603 pkt_dev->nr_labels = 0; /* turn off MPLS */
1604 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1606 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1607 pkt_dev->svlan_id = 0xffff;
1610 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1615 if (!strcmp(name, "vlan_p")) {
1616 len = num_arg(&user_buffer[i], 1, &value);
1621 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1622 pkt_dev->vlan_p = value;
1623 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1625 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1630 if (!strcmp(name, "vlan_cfi")) {
1631 len = num_arg(&user_buffer[i], 1, &value);
1636 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1637 pkt_dev->vlan_cfi = value;
1638 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1640 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1645 if (!strcmp(name, "svlan_id")) {
1646 len = num_arg(&user_buffer[i], 4, &value);
1651 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1652 pkt_dev->svlan_id = value; /* turn on SVLAN */
1655 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1657 if (debug && pkt_dev->nr_labels)
1658 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1660 pkt_dev->nr_labels = 0; /* turn off MPLS */
1661 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1663 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1664 pkt_dev->svlan_id = 0xffff;
1667 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1672 if (!strcmp(name, "svlan_p")) {
1673 len = num_arg(&user_buffer[i], 1, &value);
1678 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1679 pkt_dev->svlan_p = value;
1680 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1682 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1687 if (!strcmp(name, "svlan_cfi")) {
1688 len = num_arg(&user_buffer[i], 1, &value);
1693 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1694 pkt_dev->svlan_cfi = value;
1695 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1697 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1702 if (!strcmp(name, "tos")) {
1703 __u32 tmp_value = 0;
1704 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1710 pkt_dev->tos = tmp_value;
1711 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1713 sprintf(pg_result, "ERROR: tos must be 00-ff");
1718 if (!strcmp(name, "traffic_class")) {
1719 __u32 tmp_value = 0;
1720 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1726 pkt_dev->traffic_class = tmp_value;
1727 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1729 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1734 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1738 static int pktgen_if_open(struct inode *inode, struct file *file)
1740 return single_open(file, pktgen_if_show, PDE(inode)->data);
1743 static const struct file_operations pktgen_if_fops = {
1744 .owner = THIS_MODULE,
1745 .open = pktgen_if_open,
1747 .llseek = seq_lseek,
1748 .write = pktgen_if_write,
1749 .release = single_release,
1752 static int pktgen_thread_show(struct seq_file *seq, void *v)
1754 struct pktgen_thread *t = seq->private;
1755 struct pktgen_dev *pkt_dev;
1759 seq_printf(seq, "Running: ");
1762 list_for_each_entry(pkt_dev, &t->if_list, list)
1763 if (pkt_dev->running)
1764 seq_printf(seq, "%s ", pkt_dev->odev->name);
1766 seq_printf(seq, "\nStopped: ");
1768 list_for_each_entry(pkt_dev, &t->if_list, list)
1769 if (!pkt_dev->running)
1770 seq_printf(seq, "%s ", pkt_dev->odev->name);
1773 seq_printf(seq, "\nResult: %s\n", t->result);
1775 seq_printf(seq, "\nResult: NA\n");
1782 static ssize_t pktgen_thread_write(struct file *file,
1783 const char __user * user_buffer,
1784 size_t count, loff_t * offset)
1786 struct seq_file *seq = (struct seq_file *)file->private_data;
1787 struct pktgen_thread *t = seq->private;
1788 int i = 0, max, len, ret;
1793 // sprintf(pg_result, "Wrong command format");
1798 len = count_trail_chars(&user_buffer[i], max);
1804 /* Read variable name */
1806 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1810 memset(name, 0, sizeof(name));
1811 if (copy_from_user(name, &user_buffer[i], len))
1816 len = count_trail_chars(&user_buffer[i], max);
1823 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1824 name, (unsigned long)count);
1827 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1832 pg_result = &(t->result[0]);
1834 if (!strcmp(name, "add_device")) {
1837 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1842 if (copy_from_user(f, &user_buffer[i], len))
1845 mutex_lock(&pktgen_thread_lock);
1846 pktgen_add_device(t, f);
1847 mutex_unlock(&pktgen_thread_lock);
1849 sprintf(pg_result, "OK: add_device=%s", f);
1853 if (!strcmp(name, "rem_device_all")) {
1854 mutex_lock(&pktgen_thread_lock);
1855 t->control |= T_REMDEVALL;
1856 mutex_unlock(&pktgen_thread_lock);
1857 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1859 sprintf(pg_result, "OK: rem_device_all");
1863 if (!strcmp(name, "max_before_softirq")) {
1864 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1874 static int pktgen_thread_open(struct inode *inode, struct file *file)
1876 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1879 static const struct file_operations pktgen_thread_fops = {
1880 .owner = THIS_MODULE,
1881 .open = pktgen_thread_open,
1883 .llseek = seq_lseek,
1884 .write = pktgen_thread_write,
1885 .release = single_release,
1888 /* Think find or remove for NN */
1889 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1891 struct pktgen_thread *t;
1892 struct pktgen_dev *pkt_dev = NULL;
1894 list_for_each_entry(t, &pktgen_threads, th_list) {
1895 pkt_dev = pktgen_find_dev(t, ifname);
1899 pkt_dev->removal_mark = 1;
1900 t->control |= T_REMDEV;
1910 * mark a device for removal
1912 static void pktgen_mark_device(const char *ifname)
1914 struct pktgen_dev *pkt_dev = NULL;
1915 const int max_tries = 10, msec_per_try = 125;
1918 mutex_lock(&pktgen_thread_lock);
1919 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1923 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1924 if (pkt_dev == NULL)
1925 break; /* success */
1927 mutex_unlock(&pktgen_thread_lock);
1928 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1929 "to disappear....\n", ifname);
1930 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1931 mutex_lock(&pktgen_thread_lock);
1933 if (++i >= max_tries) {
1934 printk(KERN_ERR "pktgen_mark_device: timed out after "
1935 "waiting %d msec for device %s to be removed\n",
1936 msec_per_try * i, ifname);
1942 mutex_unlock(&pktgen_thread_lock);
1945 static void pktgen_change_name(struct net_device *dev)
1947 struct pktgen_thread *t;
1949 list_for_each_entry(t, &pktgen_threads, th_list) {
1950 struct pktgen_dev *pkt_dev;
1952 list_for_each_entry(pkt_dev, &t->if_list, list) {
1953 if (pkt_dev->odev != dev)
1956 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1958 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1960 if (!pkt_dev->entry)
1961 printk(KERN_ERR "pktgen: can't move proc "
1962 " entry for '%s'\n", dev->name);
1968 static int pktgen_device_event(struct notifier_block *unused,
1969 unsigned long event, void *ptr)
1971 struct net_device *dev = ptr;
1973 if (dev->nd_net != &init_net)
1976 /* It is OK that we do not hold the group lock right now,
1977 * as we run under the RTNL lock.
1981 case NETDEV_CHANGENAME:
1982 pktgen_change_name(dev);
1985 case NETDEV_UNREGISTER:
1986 pktgen_mark_device(dev->name);
1993 /* Associate pktgen_dev with a device. */
1995 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1997 struct net_device *odev;
2000 /* Clean old setups */
2001 if (pkt_dev->odev) {
2002 dev_put(pkt_dev->odev);
2003 pkt_dev->odev = NULL;
2006 odev = dev_get_by_name(&init_net, ifname);
2008 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
2012 if (odev->type != ARPHRD_ETHER) {
2013 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
2015 } else if (!netif_running(odev)) {
2016 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
2019 pkt_dev->odev = odev;
2027 /* Read pkt_dev from the interface and set up internal pktgen_dev
2028 * structure to have the right information to create/send packets
2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2032 if (!pkt_dev->odev) {
2033 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
2035 sprintf(pkt_dev->result,
2036 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2040 /* Default to the interface's mac if not explicitly set. */
2042 if (is_zero_ether_addr(pkt_dev->src_mac))
2043 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2045 /* Set up Dest MAC */
2046 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2048 /* Set up pkt size */
2049 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2051 if (pkt_dev->flags & F_IPV6) {
2053 * Skip this automatic address setting until locks or functions
2058 int i, set = 0, err = 1;
2059 struct inet6_dev *idev;
2061 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2062 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2070 * Use linklevel address if unconfigured.
2072 * use ipv6_get_lladdr if/when it's get exported
2076 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2077 struct inet6_ifaddr *ifp;
2079 read_lock_bh(&idev->lock);
2080 for (ifp = idev->addr_list; ifp;
2081 ifp = ifp->if_next) {
2082 if (ifp->scope == IFA_LINK
2084 flags & IFA_F_TENTATIVE)) {
2085 ipv6_addr_copy(&pkt_dev->
2092 read_unlock_bh(&idev->lock);
2096 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2097 "address not availble.\n");
2101 pkt_dev->saddr_min = 0;
2102 pkt_dev->saddr_max = 0;
2103 if (strlen(pkt_dev->src_min) == 0) {
2105 struct in_device *in_dev;
2108 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2110 if (in_dev->ifa_list) {
2111 pkt_dev->saddr_min =
2112 in_dev->ifa_list->ifa_address;
2113 pkt_dev->saddr_max = pkt_dev->saddr_min;
2118 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2119 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2122 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2123 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2125 /* Initialize current values. */
2126 pkt_dev->cur_dst_mac_offset = 0;
2127 pkt_dev->cur_src_mac_offset = 0;
2128 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2129 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2130 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2131 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2132 pkt_dev->nflows = 0;
2135 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2140 start = now = getCurUs();
2141 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2142 while (now < spin_until_us) {
2143 /* TODO: optimize sleeping behavior */
2144 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2145 schedule_timeout_interruptible(1);
2146 else if (spin_until_us - now > 100) {
2147 if (!pkt_dev->running)
2156 pkt_dev->idle_acc += now - start;
2159 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2161 pkt_dev->pkt_overhead = 0;
2162 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2163 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2164 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2167 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
2170 if (pkt_dev->flows[flow].flags & F_INIT)
2176 static inline int f_pick(struct pktgen_dev *pkt_dev)
2178 int flow = pkt_dev->curfl;
2180 if (pkt_dev->flags & F_FLOW_SEQ) {
2181 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2183 pkt_dev->flows[flow].count = 0;
2184 pkt_dev->curfl += 1;
2185 if (pkt_dev->curfl >= pkt_dev->cflows)
2186 pkt_dev->curfl = 0; /*reset */
2189 flow = random32() % pkt_dev->cflows;
2191 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2192 pkt_dev->flows[flow].count = 0;
2195 return pkt_dev->curfl;
2200 /* If there was already an IPSEC SA, we keep it as is, else
2201 * we go look for it ...
2203 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2205 struct xfrm_state *x = pkt_dev->flows[flow].x;
2207 /*slow path: we dont already have xfrm_state*/
2208 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr,
2209 (xfrm_address_t *)&pkt_dev->cur_saddr,
2212 pkt_dev->ipsproto, 0);
2214 pkt_dev->flows[flow].x = x;
2215 set_pkt_overhead(pkt_dev);
2216 pkt_dev->pkt_overhead+=x->props.header_len;
2222 /* Increment/randomize headers according to flags and current values
2223 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2225 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2231 if (pkt_dev->cflows)
2232 flow = f_pick(pkt_dev);
2234 /* Deal with source MAC */
2235 if (pkt_dev->src_mac_count > 1) {
2239 if (pkt_dev->flags & F_MACSRC_RND)
2240 mc = random32() % pkt_dev->src_mac_count;
2242 mc = pkt_dev->cur_src_mac_offset++;
2243 if (pkt_dev->cur_src_mac_offset >
2244 pkt_dev->src_mac_count)
2245 pkt_dev->cur_src_mac_offset = 0;
2248 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2249 pkt_dev->hh[11] = tmp;
2250 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2251 pkt_dev->hh[10] = tmp;
2252 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2253 pkt_dev->hh[9] = tmp;
2254 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2255 pkt_dev->hh[8] = tmp;
2256 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2257 pkt_dev->hh[7] = tmp;
2260 /* Deal with Destination MAC */
2261 if (pkt_dev->dst_mac_count > 1) {
2265 if (pkt_dev->flags & F_MACDST_RND)
2266 mc = random32() % pkt_dev->dst_mac_count;
2269 mc = pkt_dev->cur_dst_mac_offset++;
2270 if (pkt_dev->cur_dst_mac_offset >
2271 pkt_dev->dst_mac_count) {
2272 pkt_dev->cur_dst_mac_offset = 0;
2276 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2277 pkt_dev->hh[5] = tmp;
2278 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2279 pkt_dev->hh[4] = tmp;
2280 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2281 pkt_dev->hh[3] = tmp;
2282 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2283 pkt_dev->hh[2] = tmp;
2284 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2285 pkt_dev->hh[1] = tmp;
2288 if (pkt_dev->flags & F_MPLS_RND) {
2290 for (i = 0; i < pkt_dev->nr_labels; i++)
2291 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2292 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2293 ((__force __be32)random32() &
2297 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2298 pkt_dev->vlan_id = random32() & (4096-1);
2301 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2302 pkt_dev->svlan_id = random32() & (4096 - 1);
2305 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2306 if (pkt_dev->flags & F_UDPSRC_RND)
2307 pkt_dev->cur_udp_src = random32() %
2308 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2309 + pkt_dev->udp_src_min;
2312 pkt_dev->cur_udp_src++;
2313 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2314 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2318 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2319 if (pkt_dev->flags & F_UDPDST_RND) {
2320 pkt_dev->cur_udp_dst = random32() %
2321 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2322 + pkt_dev->udp_dst_min;
2324 pkt_dev->cur_udp_dst++;
2325 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2326 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2330 if (!(pkt_dev->flags & F_IPV6)) {
2332 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2336 if (pkt_dev->flags & F_IPSRC_RND)
2337 t = random32() % (imx - imn) + imn;
2339 t = ntohl(pkt_dev->cur_saddr);
2345 pkt_dev->cur_saddr = htonl(t);
2348 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2349 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2351 imn = ntohl(pkt_dev->daddr_min);
2352 imx = ntohl(pkt_dev->daddr_max);
2356 if (pkt_dev->flags & F_IPDST_RND) {
2358 t = random32() % (imx - imn) + imn;
2361 while (LOOPBACK(s) || MULTICAST(s)
2362 || BADCLASS(s) || ZERONET(s)
2363 || LOCAL_MCAST(s)) {
2364 t = random32() % (imx - imn) + imn;
2367 pkt_dev->cur_daddr = s;
2369 t = ntohl(pkt_dev->cur_daddr);
2374 pkt_dev->cur_daddr = htonl(t);
2377 if (pkt_dev->cflows) {
2378 pkt_dev->flows[flow].flags |= F_INIT;
2379 pkt_dev->flows[flow].cur_daddr =
2382 if (pkt_dev->flags & F_IPSEC_ON)
2383 get_ipsec_sa(pkt_dev, flow);
2388 } else { /* IPV6 * */
2390 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2391 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2392 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2393 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2397 /* Only random destinations yet */
2399 for (i = 0; i < 4; i++) {
2400 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2401 (((__force __be32)random32() |
2402 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2403 pkt_dev->max_in6_daddr.s6_addr32[i]);
2408 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2410 if (pkt_dev->flags & F_TXSIZE_RND) {
2412 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2413 + pkt_dev->min_pkt_size;
2415 t = pkt_dev->cur_pkt_size + 1;
2416 if (t > pkt_dev->max_pkt_size)
2417 t = pkt_dev->min_pkt_size;
2419 pkt_dev->cur_pkt_size = t;
2422 if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2424 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2426 (pkt_dev->queue_map_max - pkt_dev->queue_map_min + 1)
2427 + pkt_dev->queue_map_min;
2429 t = pkt_dev->cur_queue_map + 1;
2430 if (t > pkt_dev->queue_map_max)
2431 t = pkt_dev->queue_map_min;
2433 pkt_dev->cur_queue_map = t;
2436 pkt_dev->flows[flow].count++;
2441 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2443 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2449 /* XXX: we dont support tunnel mode for now until
2450 * we resolve the dst issue */
2451 if (x->props.mode != XFRM_MODE_TRANSPORT)
2454 spin_lock(&x->lock);
2457 err = x->outer_mode->output(x, skb);
2460 err = x->type->output(x, skb);
2464 x->curlft.bytes +=skb->len;
2465 x->curlft.packets++;
2467 spin_unlock(&x->lock);
2471 static inline void free_SAs(struct pktgen_dev *pkt_dev)
2473 if (pkt_dev->cflows) {
2474 /* let go of the SAs if we have them */
2476 for (; i < pkt_dev->nflows; i++){
2477 struct xfrm_state *x = pkt_dev->flows[i].x;
2480 pkt_dev->flows[i].x = NULL;
2486 static inline int process_ipsec(struct pktgen_dev *pkt_dev,
2487 struct sk_buff *skb, __be16 protocol)
2489 if (pkt_dev->flags & F_IPSEC_ON) {
2490 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2495 nhead = x->props.header_len - skb_headroom(skb);
2497 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2499 printk(KERN_ERR "Error expanding "
2500 "ipsec packet %d\n",ret);
2505 /* ipsec is not expecting ll header */
2506 skb_pull(skb, ETH_HLEN);
2507 ret = pktgen_output_ipsec(skb, pkt_dev);
2509 printk(KERN_ERR "Error creating ipsec "
2515 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2516 memcpy(eth, pkt_dev->hh, 12);
2517 *(u16 *) & eth[12] = protocol;
2524 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2527 for (i = 0; i < pkt_dev->nr_labels; i++) {
2528 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2531 *mpls |= MPLS_STACK_BOTTOM;
2534 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2537 return htons(id | (cfi << 12) | (prio << 13));
2540 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2541 struct pktgen_dev *pkt_dev)
2543 struct sk_buff *skb = NULL;
2545 struct udphdr *udph;
2548 struct pktgen_hdr *pgh = NULL;
2549 __be16 protocol = htons(ETH_P_IP);
2551 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2552 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2553 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2554 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2557 if (pkt_dev->nr_labels)
2558 protocol = htons(ETH_P_MPLS_UC);
2560 if (pkt_dev->vlan_id != 0xffff)
2561 protocol = htons(ETH_P_8021Q);
2563 /* Update any of the values, used when we're incrementing various
2566 mod_cur_headers(pkt_dev);
2568 datalen = (odev->hard_header_len + 16) & ~0xf;
2569 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2570 pkt_dev->pkt_overhead, GFP_ATOMIC);
2572 sprintf(pkt_dev->result, "No memory");
2576 skb_reserve(skb, datalen);
2578 /* Reserve for ethernet and IP header */
2579 eth = (__u8 *) skb_push(skb, 14);
2580 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2581 if (pkt_dev->nr_labels)
2582 mpls_push(mpls, pkt_dev);
2584 if (pkt_dev->vlan_id != 0xffff) {
2585 if (pkt_dev->svlan_id != 0xffff) {
2586 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2587 *svlan_tci = build_tci(pkt_dev->svlan_id,
2590 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2591 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2593 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2594 *vlan_tci = build_tci(pkt_dev->vlan_id,
2597 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2598 *vlan_encapsulated_proto = htons(ETH_P_IP);
2601 skb->network_header = skb->tail;
2602 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2603 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2604 skb_set_queue_mapping(skb, pkt_dev->cur_queue_map);
2606 udph = udp_hdr(skb);
2608 memcpy(eth, pkt_dev->hh, 12);
2609 *(__be16 *) & eth[12] = protocol;
2611 /* Eth + IPh + UDPh + mpls */
2612 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2613 pkt_dev->pkt_overhead;
2614 if (datalen < sizeof(struct pktgen_hdr))
2615 datalen = sizeof(struct pktgen_hdr);
2617 udph->source = htons(pkt_dev->cur_udp_src);
2618 udph->dest = htons(pkt_dev->cur_udp_dst);
2619 udph->len = htons(datalen + 8); /* DATA + udphdr */
2620 udph->check = 0; /* No checksum */
2625 iph->tos = pkt_dev->tos;
2626 iph->protocol = IPPROTO_UDP; /* UDP */
2627 iph->saddr = pkt_dev->cur_saddr;
2628 iph->daddr = pkt_dev->cur_daddr;
2630 iplen = 20 + 8 + datalen;
2631 iph->tot_len = htons(iplen);
2633 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2634 skb->protocol = protocol;
2635 skb->mac_header = (skb->network_header - ETH_HLEN -
2636 pkt_dev->pkt_overhead);
2638 skb->pkt_type = PACKET_HOST;
2640 if (pkt_dev->nfrags <= 0)
2641 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2643 int frags = pkt_dev->nfrags;
2646 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2648 if (frags > MAX_SKB_FRAGS)
2649 frags = MAX_SKB_FRAGS;
2650 if (datalen > frags * PAGE_SIZE) {
2651 skb_put(skb, datalen - frags * PAGE_SIZE);
2652 datalen = frags * PAGE_SIZE;
2656 while (datalen > 0) {
2657 struct page *page = alloc_pages(GFP_KERNEL, 0);
2658 skb_shinfo(skb)->frags[i].page = page;
2659 skb_shinfo(skb)->frags[i].page_offset = 0;
2660 skb_shinfo(skb)->frags[i].size =
2661 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2662 datalen -= skb_shinfo(skb)->frags[i].size;
2663 skb->len += skb_shinfo(skb)->frags[i].size;
2664 skb->data_len += skb_shinfo(skb)->frags[i].size;
2666 skb_shinfo(skb)->nr_frags = i;
2675 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2679 skb_shinfo(skb)->frags[i - 1].size -= rem;
2681 skb_shinfo(skb)->frags[i] =
2682 skb_shinfo(skb)->frags[i - 1];
2683 get_page(skb_shinfo(skb)->frags[i].page);
2684 skb_shinfo(skb)->frags[i].page =
2685 skb_shinfo(skb)->frags[i - 1].page;
2686 skb_shinfo(skb)->frags[i].page_offset +=
2687 skb_shinfo(skb)->frags[i - 1].size;
2688 skb_shinfo(skb)->frags[i].size = rem;
2690 skb_shinfo(skb)->nr_frags = i;
2694 /* Stamp the time, and sequence number, convert them to network byte order */
2697 struct timeval timestamp;
2699 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2700 pgh->seq_num = htonl(pkt_dev->seq_num);
2702 do_gettimeofday(×tamp);
2703 pgh->tv_sec = htonl(timestamp.tv_sec);
2704 pgh->tv_usec = htonl(timestamp.tv_usec);
2708 if (!process_ipsec(pkt_dev, skb, protocol))
2716 * scan_ip6, fmt_ip taken from dietlibc-0.21
2717 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2719 * Slightly modified for kernel.
2720 * Should be candidate for net/ipv4/utils.c
2724 static unsigned int scan_ip6(const char *s, char ip[16])
2727 unsigned int len = 0;
2730 unsigned int prefixlen = 0;
2731 unsigned int suffixlen = 0;
2735 for (i = 0; i < 16; i++)
2741 if (s[1] == ':') { /* Found "::", skip to part 2 */
2749 u = simple_strtoul(s, &pos, 16);
2753 if (prefixlen == 12 && s[i] == '.') {
2755 /* the last 4 bytes may be written as IPv4 address */
2758 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2761 ip[prefixlen++] = (u >> 8);
2762 ip[prefixlen++] = (u & 255);
2765 if (prefixlen == 16)
2769 /* part 2, after "::" */
2776 } else if (suffixlen != 0)
2779 u = simple_strtol(s, &pos, 16);
2786 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2788 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2794 suffix[suffixlen++] = (u >> 8);
2795 suffix[suffixlen++] = (u & 255);
2798 if (prefixlen + suffixlen == 16)
2801 for (i = 0; i < suffixlen; i++)
2802 ip[16 - suffixlen + i] = suffix[i];
2806 static char tohex(char hexdigit)
2808 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2811 static int fmt_xlong(char *s, unsigned int i)
2814 *s = tohex((i >> 12) & 0xf);
2815 if (s != bak || *s != '0')
2817 *s = tohex((i >> 8) & 0xf);
2818 if (s != bak || *s != '0')
2820 *s = tohex((i >> 4) & 0xf);
2821 if (s != bak || *s != '0')
2823 *s = tohex(i & 0xf);
2827 static unsigned int fmt_ip6(char *s, const char ip[16])
2832 unsigned int compressing;
2837 for (j = 0; j < 16; j += 2) {
2839 #ifdef V4MAPPEDPREFIX
2840 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2841 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2846 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2847 (unsigned long)(unsigned char)ip[j + 1];
2862 i = fmt_xlong(s, temp);
2879 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2880 struct pktgen_dev *pkt_dev)
2882 struct sk_buff *skb = NULL;
2884 struct udphdr *udph;
2886 struct ipv6hdr *iph;
2887 struct pktgen_hdr *pgh = NULL;
2888 __be16 protocol = htons(ETH_P_IPV6);
2890 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2891 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2892 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2893 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2895 if (pkt_dev->nr_labels)
2896 protocol = htons(ETH_P_MPLS_UC);
2898 if (pkt_dev->vlan_id != 0xffff)
2899 protocol = htons(ETH_P_8021Q);
2901 /* Update any of the values, used when we're incrementing various
2904 mod_cur_headers(pkt_dev);
2906 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2907 pkt_dev->pkt_overhead, GFP_ATOMIC);
2909 sprintf(pkt_dev->result, "No memory");
2913 skb_reserve(skb, 16);
2915 /* Reserve for ethernet and IP header */
2916 eth = (__u8 *) skb_push(skb, 14);
2917 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2918 if (pkt_dev->nr_labels)
2919 mpls_push(mpls, pkt_dev);
2921 if (pkt_dev->vlan_id != 0xffff) {
2922 if (pkt_dev->svlan_id != 0xffff) {
2923 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2924 *svlan_tci = build_tci(pkt_dev->svlan_id,
2927 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2928 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2930 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2931 *vlan_tci = build_tci(pkt_dev->vlan_id,
2934 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2935 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2938 skb->network_header = skb->tail;
2939 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2940 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2941 skb_set_queue_mapping(skb, pkt_dev->cur_queue_map);
2942 iph = ipv6_hdr(skb);
2943 udph = udp_hdr(skb);
2945 memcpy(eth, pkt_dev->hh, 12);
2946 *(__be16 *) & eth[12] = protocol;
2948 /* Eth + IPh + UDPh + mpls */
2949 datalen = pkt_dev->cur_pkt_size - 14 -
2950 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2951 pkt_dev->pkt_overhead;
2953 if (datalen < sizeof(struct pktgen_hdr)) {
2954 datalen = sizeof(struct pktgen_hdr);
2955 if (net_ratelimit())
2956 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2960 udph->source = htons(pkt_dev->cur_udp_src);
2961 udph->dest = htons(pkt_dev->cur_udp_dst);
2962 udph->len = htons(datalen + sizeof(struct udphdr));
2963 udph->check = 0; /* No checksum */
2965 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2967 if (pkt_dev->traffic_class) {
2968 /* Version + traffic class + flow (0) */
2969 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2972 iph->hop_limit = 32;
2974 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2975 iph->nexthdr = IPPROTO_UDP;
2977 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2978 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2980 skb->mac_header = (skb->network_header - ETH_HLEN -
2981 pkt_dev->pkt_overhead);
2982 skb->protocol = protocol;
2984 skb->pkt_type = PACKET_HOST;
2986 if (pkt_dev->nfrags <= 0)
2987 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2989 int frags = pkt_dev->nfrags;
2992 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2994 if (frags > MAX_SKB_FRAGS)
2995 frags = MAX_SKB_FRAGS;
2996 if (datalen > frags * PAGE_SIZE) {
2997 skb_put(skb, datalen - frags * PAGE_SIZE);
2998 datalen = frags * PAGE_SIZE;
3002 while (datalen > 0) {
3003 struct page *page = alloc_pages(GFP_KERNEL, 0);
3004 skb_shinfo(skb)->frags[i].page = page;
3005 skb_shinfo(skb)->frags[i].page_offset = 0;
3006 skb_shinfo(skb)->frags[i].size =
3007 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3008 datalen -= skb_shinfo(skb)->frags[i].size;
3009 skb->len += skb_shinfo(skb)->frags[i].size;
3010 skb->data_len += skb_shinfo(skb)->frags[i].size;
3012 skb_shinfo(skb)->nr_frags = i;
3021 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3025 skb_shinfo(skb)->frags[i - 1].size -= rem;
3027 skb_shinfo(skb)->frags[i] =
3028 skb_shinfo(skb)->frags[i - 1];
3029 get_page(skb_shinfo(skb)->frags[i].page);
3030 skb_shinfo(skb)->frags[i].page =
3031 skb_shinfo(skb)->frags[i - 1].page;
3032 skb_shinfo(skb)->frags[i].page_offset +=
3033 skb_shinfo(skb)->frags[i - 1].size;
3034 skb_shinfo(skb)->frags[i].size = rem;
3036 skb_shinfo(skb)->nr_frags = i;
3040 /* Stamp the time, and sequence number, convert them to network byte order */
3041 /* should we update cloned packets too ? */
3043 struct timeval timestamp;
3045 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3046 pgh->seq_num = htonl(pkt_dev->seq_num);
3048 do_gettimeofday(×tamp);
3049 pgh->tv_sec = htonl(timestamp.tv_sec);
3050 pgh->tv_usec = htonl(timestamp.tv_usec);
3052 /* pkt_dev->seq_num++; FF: you really mean this? */
3057 static inline struct sk_buff *fill_packet(struct net_device *odev,
3058 struct pktgen_dev *pkt_dev)
3060 if (pkt_dev->flags & F_IPV6)
3061 return fill_packet_ipv6(odev, pkt_dev);
3063 return fill_packet_ipv4(odev, pkt_dev);
3066 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3068 pkt_dev->seq_num = 1;
3069 pkt_dev->idle_acc = 0;
3071 pkt_dev->tx_bytes = 0;
3072 pkt_dev->errors = 0;
3075 /* Set up structure for sending pkts, clear counters */
3077 static void pktgen_run(struct pktgen_thread *t)
3079 struct pktgen_dev *pkt_dev;
3082 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3085 list_for_each_entry(pkt_dev, &t->if_list, list) {
3088 * setup odev and create initial packet.
3090 pktgen_setup_inject(pkt_dev);
3092 if (pkt_dev->odev) {
3093 pktgen_clear_counters(pkt_dev);
3094 pkt_dev->running = 1; /* Cranke yeself! */
3095 pkt_dev->skb = NULL;
3096 pkt_dev->started_at = getCurUs();
3097 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
3098 pkt_dev->next_tx_ns = 0;
3099 set_pkt_overhead(pkt_dev);
3101 strcpy(pkt_dev->result, "Starting");
3104 strcpy(pkt_dev->result, "Error starting");
3108 t->control &= ~(T_STOP);
3111 static void pktgen_stop_all_threads_ifs(void)
3113 struct pktgen_thread *t;
3115 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3117 mutex_lock(&pktgen_thread_lock);
3119 list_for_each_entry(t, &pktgen_threads, th_list)
3120 t->control |= T_STOP;
3122 mutex_unlock(&pktgen_thread_lock);
3125 static int thread_is_running(struct pktgen_thread *t)
3127 struct pktgen_dev *pkt_dev;
3130 list_for_each_entry(pkt_dev, &t->if_list, list)
3131 if (pkt_dev->running) {
3138 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3142 while (thread_is_running(t)) {
3146 msleep_interruptible(100);
3148 if (signal_pending(current))
3158 static int pktgen_wait_all_threads_run(void)
3160 struct pktgen_thread *t;
3163 mutex_lock(&pktgen_thread_lock);
3165 list_for_each_entry(t, &pktgen_threads, th_list) {
3166 sig = pktgen_wait_thread_run(t);
3172 list_for_each_entry(t, &pktgen_threads, th_list)
3173 t->control |= (T_STOP);
3175 mutex_unlock(&pktgen_thread_lock);
3179 static void pktgen_run_all_threads(void)
3181 struct pktgen_thread *t;
3183 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3185 mutex_lock(&pktgen_thread_lock);
3187 list_for_each_entry(t, &pktgen_threads, th_list)
3188 t->control |= (T_RUN);
3190 mutex_unlock(&pktgen_thread_lock);
3192 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3194 pktgen_wait_all_threads_run();
3197 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3199 __u64 total_us, bps, mbps, pps, idle;
3200 char *p = pkt_dev->result;
3202 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3204 idle = pkt_dev->idle_acc;
3206 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3207 (unsigned long long)total_us,
3208 (unsigned long long)(total_us - idle),
3209 (unsigned long long)idle,
3210 (unsigned long long)pkt_dev->sofar,
3211 pkt_dev->cur_pkt_size, nr_frags);
3213 pps = pkt_dev->sofar * USEC_PER_SEC;
3215 while ((total_us >> 32) != 0) {
3220 do_div(pps, total_us);
3222 bps = pps * 8 * pkt_dev->cur_pkt_size;
3225 do_div(mbps, 1000000);
3226 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3227 (unsigned long long)pps,
3228 (unsigned long long)mbps,
3229 (unsigned long long)bps,
3230 (unsigned long long)pkt_dev->errors);
3233 /* Set stopped-at timer, remove from running list, do counters & statistics */
3235 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3237 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3239 if (!pkt_dev->running) {
3240 printk(KERN_WARNING "pktgen: interface: %s is already "
3241 "stopped\n", pkt_dev->odev->name);
3245 pkt_dev->stopped_at = getCurUs();
3246 pkt_dev->running = 0;
3248 show_results(pkt_dev, nr_frags);
3253 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3255 struct pktgen_dev *pkt_dev, *best = NULL;
3259 list_for_each_entry(pkt_dev, &t->if_list, list) {
3260 if (!pkt_dev->running)
3264 else if (pkt_dev->next_tx_us < best->next_tx_us)
3271 static void pktgen_stop(struct pktgen_thread *t)
3273 struct pktgen_dev *pkt_dev;
3275 pr_debug("pktgen: entering pktgen_stop\n");
3279 list_for_each_entry(pkt_dev, &t->if_list, list) {
3280 pktgen_stop_device(pkt_dev);
3282 kfree_skb(pkt_dev->skb);
3284 pkt_dev->skb = NULL;
3291 * one of our devices needs to be removed - find it
3294 static void pktgen_rem_one_if(struct pktgen_thread *t)
3296 struct list_head *q, *n;
3297 struct pktgen_dev *cur;
3299 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3303 list_for_each_safe(q, n, &t->if_list) {
3304 cur = list_entry(q, struct pktgen_dev, list);
3306 if (!cur->removal_mark)
3310 kfree_skb(cur->skb);
3313 pktgen_remove_device(t, cur);
3321 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3323 struct list_head *q, *n;
3324 struct pktgen_dev *cur;
3326 /* Remove all devices, free mem */
3328 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3331 list_for_each_safe(q, n, &t->if_list) {
3332 cur = list_entry(q, struct pktgen_dev, list);
3335 kfree_skb(cur->skb);
3338 pktgen_remove_device(t, cur);
3344 static void pktgen_rem_thread(struct pktgen_thread *t)
3346 /* Remove from the thread list */
3348 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3350 mutex_lock(&pktgen_thread_lock);
3352 list_del(&t->th_list);
3354 mutex_unlock(&pktgen_thread_lock);
3357 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3359 struct net_device *odev = NULL;
3360 __u64 idle_start = 0;
3363 odev = pkt_dev->odev;
3365 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3369 if (now < pkt_dev->next_tx_us)
3370 spin(pkt_dev, pkt_dev->next_tx_us);
3372 /* This is max DELAY, this has special meaning of
3375 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3376 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3377 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3382 if ((netif_queue_stopped(odev) ||
3384 netif_subqueue_stopped(odev, pkt_dev->skb))) ||
3386 idle_start = getCurUs();
3388 if (!netif_running(odev)) {
3389 pktgen_stop_device(pkt_dev);
3391 kfree_skb(pkt_dev->skb);
3392 pkt_dev->skb = NULL;
3398 pkt_dev->idle_acc += getCurUs() - idle_start;
3400 if (netif_queue_stopped(odev) ||
3401 netif_subqueue_stopped(odev, pkt_dev->skb)) {
3402 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3403 pkt_dev->next_tx_ns = 0;
3404 goto out; /* Try the next interface */
3408 if (pkt_dev->last_ok || !pkt_dev->skb) {
3409 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3410 || (!pkt_dev->skb)) {
3411 /* build a new pkt */
3413 kfree_skb(pkt_dev->skb);
3415 pkt_dev->skb = fill_packet(odev, pkt_dev);
3416 if (pkt_dev->skb == NULL) {
3417 printk(KERN_ERR "pktgen: ERROR: couldn't "
3418 "allocate skb in fill_packet.\n");
3420 pkt_dev->clone_count--; /* back out increment, OOM */
3423 pkt_dev->allocated_skbs++;
3424 pkt_dev->clone_count = 0; /* reset counter */
3428 netif_tx_lock_bh(odev);
3429 if (!netif_queue_stopped(odev) &&
3430 !netif_subqueue_stopped(odev, pkt_dev->skb)) {
3432 atomic_inc(&(pkt_dev->skb->users));
3434 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3435 if (likely(ret == NETDEV_TX_OK)) {
3436 pkt_dev->last_ok = 1;
3439 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3441 } else if (ret == NETDEV_TX_LOCKED
3442 && (odev->features & NETIF_F_LLTX)) {
3445 } else { /* Retry it next time */
3447 atomic_dec(&(pkt_dev->skb->users));
3449 if (debug && net_ratelimit())
3450 printk(KERN_INFO "pktgen: Hard xmit error\n");
3453 pkt_dev->last_ok = 0;
3456 pkt_dev->next_tx_us = getCurUs();
3457 pkt_dev->next_tx_ns = 0;
3459 pkt_dev->next_tx_us += pkt_dev->delay_us;
3460 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3462 if (pkt_dev->next_tx_ns > 1000) {
3463 pkt_dev->next_tx_us++;
3464 pkt_dev->next_tx_ns -= 1000;
3468 else { /* Retry it next time */
3469 pkt_dev->last_ok = 0;
3470 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3471 pkt_dev->next_tx_ns = 0;
3474 netif_tx_unlock_bh(odev);
3476 /* If pkt_dev->count is zero, then run forever */
3477 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3478 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3479 idle_start = getCurUs();
3480 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3481 if (signal_pending(current)) {
3486 pkt_dev->idle_acc += getCurUs() - idle_start;
3489 /* Done with this */
3490 pktgen_stop_device(pkt_dev);
3492 kfree_skb(pkt_dev->skb);
3493 pkt_dev->skb = NULL;
3499 * Main loop of the thread goes here
3502 static int pktgen_thread_worker(void *arg)
3505 struct pktgen_thread *t = arg;
3506 struct pktgen_dev *pkt_dev = NULL;
3509 BUG_ON(smp_processor_id() != cpu);
3511 init_waitqueue_head(&t->queue);
3513 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3515 set_current_state(TASK_INTERRUPTIBLE);
3519 while (!kthread_should_stop()) {
3520 pkt_dev = next_to_run(t);
3523 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3525 prepare_to_wait(&(t->queue), &wait,
3526 TASK_INTERRUPTIBLE);
3527 schedule_timeout(HZ / 10);
3528 finish_wait(&(t->queue), &wait);
3531 __set_current_state(TASK_RUNNING);
3534 pktgen_xmit(pkt_dev);
3536 if (t->control & T_STOP) {
3538 t->control &= ~(T_STOP);
3541 if (t->control & T_RUN) {
3543 t->control &= ~(T_RUN);
3546 if (t->control & T_REMDEVALL) {
3547 pktgen_rem_all_ifs(t);
3548 t->control &= ~(T_REMDEVALL);
3551 if (t->control & T_REMDEV) {
3552 pktgen_rem_one_if(t);
3553 t->control &= ~(T_REMDEV);
3558 set_current_state(TASK_INTERRUPTIBLE);
3561 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3564 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3565 pktgen_rem_all_ifs(t);
3567 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3568 pktgen_rem_thread(t);
3573 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3576 struct pktgen_dev *p, *pkt_dev = NULL;
3579 list_for_each_entry(p, &t->if_list, list)
3580 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3586 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3591 * Adds a dev at front of if_list.
3594 static int add_dev_to_thread(struct pktgen_thread *t,
3595 struct pktgen_dev *pkt_dev)
3601 if (pkt_dev->pg_thread) {
3602 printk(KERN_ERR "pktgen: ERROR: already assigned "
3608 list_add(&pkt_dev->list, &t->if_list);
3609 pkt_dev->pg_thread = t;
3610 pkt_dev->running = 0;
3617 /* Called under thread lock */
3619 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3621 struct pktgen_dev *pkt_dev;
3624 /* We don't allow a device to be on several threads */
3626 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3628 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3632 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3636 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3637 if (pkt_dev->flows == NULL) {
3641 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3643 pkt_dev->removal_mark = 0;
3644 pkt_dev->min_pkt_size = ETH_ZLEN;
3645 pkt_dev->max_pkt_size = ETH_ZLEN;
3646 pkt_dev->nfrags = 0;
3647 pkt_dev->clone_skb = pg_clone_skb_d;
3648 pkt_dev->delay_us = pg_delay_d / 1000;
3649 pkt_dev->delay_ns = pg_delay_d % 1000;
3650 pkt_dev->count = pg_count_d;
3652 pkt_dev->udp_src_min = 9; /* sink port */
3653 pkt_dev->udp_src_max = 9;
3654 pkt_dev->udp_dst_min = 9;
3655 pkt_dev->udp_dst_max = 9;
3657 pkt_dev->vlan_p = 0;
3658 pkt_dev->vlan_cfi = 0;
3659 pkt_dev->vlan_id = 0xffff;
3660 pkt_dev->svlan_p = 0;
3661 pkt_dev->svlan_cfi = 0;
3662 pkt_dev->svlan_id = 0xffff;
3664 err = pktgen_setup_dev(pkt_dev, ifname);
3668 pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir);
3669 if (!pkt_dev->entry) {
3670 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3671 PG_PROC_DIR, ifname);
3675 pkt_dev->entry->proc_fops = &pktgen_if_fops;
3676 pkt_dev->entry->data = pkt_dev;
3678 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3679 pkt_dev->ipsproto = IPPROTO_ESP;
3682 return add_dev_to_thread(t, pkt_dev);
3684 dev_put(pkt_dev->odev);
3690 vfree(pkt_dev->flows);
3695 static int __init pktgen_create_thread(int cpu)
3697 struct pktgen_thread *t;
3698 struct proc_dir_entry *pe;
3699 struct task_struct *p;
3701 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3703 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3704 "create new thread.\n");
3708 spin_lock_init(&t->if_lock);
3711 INIT_LIST_HEAD(&t->if_list);
3713 list_add_tail(&t->th_list, &pktgen_threads);
3715 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3717 printk(KERN_ERR "pktgen: kernel_thread() failed "
3718 "for cpu %d\n", t->cpu);
3719 list_del(&t->th_list);
3723 kthread_bind(p, cpu);
3726 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3728 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3729 PG_PROC_DIR, t->tsk->comm);
3731 list_del(&t->th_list);
3736 pe->proc_fops = &pktgen_thread_fops;
3745 * Removes a device from the thread if_list.
3747 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3748 struct pktgen_dev *pkt_dev)
3750 struct list_head *q, *n;
3751 struct pktgen_dev *p;
3753 list_for_each_safe(q, n, &t->if_list) {
3754 p = list_entry(q, struct pktgen_dev, list);
3760 static int pktgen_remove_device(struct pktgen_thread *t,
3761 struct pktgen_dev *pkt_dev)
3764 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3766 if (pkt_dev->running) {
3767 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3768 "running interface, stopping it now.\n");
3769 pktgen_stop_device(pkt_dev);
3772 /* Dis-associate from the interface */
3774 if (pkt_dev->odev) {
3775 dev_put(pkt_dev->odev);
3776 pkt_dev->odev = NULL;
3779 /* And update the thread if_list */
3781 _rem_dev_from_if_list(t, pkt_dev);
3784 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3790 vfree(pkt_dev->flows);
3795 static int __init pg_init(void)
3798 struct proc_dir_entry *pe;
3800 printk(KERN_INFO "%s", version);
3802 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3805 pg_proc_dir->owner = THIS_MODULE;
3807 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3809 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3810 "procfs entry.\n", PGCTRL);
3811 proc_net_remove(&init_net, PG_PROC_DIR);
3815 pe->proc_fops = &pktgen_fops;
3818 /* Register us to receive netdevice events */
3819 register_netdevice_notifier(&pktgen_notifier_block);
3821 for_each_online_cpu(cpu) {
3824 err = pktgen_create_thread(cpu);
3826 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3827 "thread for cpu %d (%d)\n", cpu, err);
3830 if (list_empty(&pktgen_threads)) {
3831 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3833 unregister_netdevice_notifier(&pktgen_notifier_block);
3834 remove_proc_entry(PGCTRL, pg_proc_dir);
3835 proc_net_remove(&init_net, PG_PROC_DIR);
3842 static void __exit pg_cleanup(void)
3844 struct pktgen_thread *t;
3845 struct list_head *q, *n;
3846 wait_queue_head_t queue;
3847 init_waitqueue_head(&queue);
3849 /* Stop all interfaces & threads */
3851 list_for_each_safe(q, n, &pktgen_threads) {
3852 t = list_entry(q, struct pktgen_thread, th_list);
3853 kthread_stop(t->tsk);
3857 /* Un-register us from receiving netdevice events */
3858 unregister_netdevice_notifier(&pktgen_notifier_block);
3860 /* Clean up proc file system */
3861 remove_proc_entry(PGCTRL, pg_proc_dir);
3862 proc_net_remove(&init_net, PG_PROC_DIR);
3865 module_init(pg_init);
3866 module_exit(pg_cleanup);
3868 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3869 MODULE_DESCRIPTION("Packet Generator tool");
3870 MODULE_LICENSE("GPL");
3871 module_param(pg_count_d, int, 0);
3872 module_param(pg_delay_d, int, 0);
3873 module_param(pg_clone_skb_d, int, 0);
3874 module_param(debug, int, 0);