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>
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/addrconf.h>
165 #include <net/xfrm.h>
167 #include <asm/byteorder.h>
168 #include <linux/rcupdate.h>
169 #include <linux/bitops.h>
170 #include <linux/io.h>
171 #include <linux/timex.h>
172 #include <linux/uaccess.h>
174 #include <asm/div64.h> /* do_div */
176 #define VERSION "2.74"
177 #define IP_NAME_SZ 32
178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179 #define MPLS_STACK_BOTTOM htonl(0x00000100)
181 #define func_enter() pr_debug("entering %s\n", __func__);
183 /* Device flag bits */
184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
193 #define F_VID_RND (1<<9) /* Random VLAN ID */
194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199 #define F_NODE (1<<15) /* Node memory alloc*/
201 /* Thread control flag bits */
202 #define T_STOP (1<<0) /* Stop run */
203 #define T_RUN (1<<1) /* Start run */
204 #define T_REMDEVALL (1<<2) /* Remove all devs */
205 #define T_REMDEV (1<<3) /* Remove one dev */
207 /* If lock -- can be removed after some work */
208 #define if_lock(t) spin_lock(&(t->if_lock));
209 #define if_unlock(t) spin_unlock(&(t->if_lock));
211 /* Used to help with determining the pkts on receive */
212 #define PKTGEN_MAGIC 0xbe9be955
213 #define PG_PROC_DIR "pktgen"
214 #define PGCTRL "pgctrl"
215 static struct proc_dir_entry
*pg_proc_dir
;
217 #define MAX_CFLOWS 65536
219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
226 struct xfrm_state
*x
;
232 #define F_INIT (1<<0) /* flow has been initialized */
236 * Try to keep frequent/infrequent used vars. separated.
238 struct proc_dir_entry
*entry
; /* proc file */
239 struct pktgen_thread
*pg_thread
;/* the owner */
240 struct list_head list
; /* chaining in the thread's run-queue */
242 int running
; /* if false, the test will stop */
244 /* If min != max, then we will either do a linear iteration, or
245 * we will do a random selection from within the range.
248 int removal_mark
; /* non-zero => the device is marked for
249 * removal by worker thread */
251 int min_pkt_size
; /* = ETH_ZLEN; */
252 int max_pkt_size
; /* = ETH_ZLEN; */
253 int pkt_overhead
; /* overhead for MPLS, VLANs, IPSEC etc */
256 u64 delay
; /* nano-seconds */
258 __u64 count
; /* Default No packets to send */
259 __u64 sofar
; /* How many pkts we've sent so far */
260 __u64 tx_bytes
; /* How many bytes we've transmitted */
261 __u64 errors
; /* Errors when trying to transmit, */
263 /* runtime counters relating to clone_skb */
265 __u64 allocated_skbs
;
267 int last_ok
; /* Was last skb sent?
268 * Or a failed transmit of some sort?
269 * This will keep sequence numbers in order
274 u64 idle_acc
; /* nano-seconds */
279 * Use multiple SKBs during packet gen.
280 * If this number is greater than 1, then
281 * that many copies of the same packet will be
282 * sent before a new packet is allocated.
283 * If you want to send 1024 identical packets
284 * before creating a new packet,
285 * set clone_skb to 1024.
288 char dst_min
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
289 char dst_max
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
290 char src_min
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
291 char src_max
[IP_NAME_SZ
]; /* IP, ie 1.2.3.4 */
293 struct in6_addr in6_saddr
;
294 struct in6_addr in6_daddr
;
295 struct in6_addr cur_in6_daddr
;
296 struct in6_addr cur_in6_saddr
;
298 struct in6_addr min_in6_daddr
;
299 struct in6_addr max_in6_daddr
;
300 struct in6_addr min_in6_saddr
;
301 struct in6_addr max_in6_saddr
;
303 /* If we're doing ranges, random or incremental, then this
304 * defines the min/max for those ranges.
306 __be32 saddr_min
; /* inclusive, source IP address */
307 __be32 saddr_max
; /* exclusive, source IP address */
308 __be32 daddr_min
; /* inclusive, dest IP address */
309 __be32 daddr_max
; /* exclusive, dest IP address */
311 __u16 udp_src_min
; /* inclusive, source UDP port */
312 __u16 udp_src_max
; /* exclusive, source UDP port */
313 __u16 udp_dst_min
; /* inclusive, dest UDP port */
314 __u16 udp_dst_max
; /* exclusive, dest UDP port */
317 __u8 tos
; /* six MSB of (former) IPv4 TOS
318 are for dscp codepoint */
319 __u8 traffic_class
; /* ditto for the (former) Traffic Class in IPv6
320 (see RFC 3260, sec. 4) */
323 unsigned nr_labels
; /* Depth of stack, 0 = no MPLS */
324 __be32 labels
[MAX_MPLS_LABELS
];
326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
329 __u16 vlan_id
; /* 0xffff means no vlan tag */
333 __u16 svlan_id
; /* 0xffff means no svlan tag */
335 __u32 src_mac_count
; /* How many MACs to iterate through */
336 __u32 dst_mac_count
; /* How many MACs to iterate through */
338 unsigned char dst_mac
[ETH_ALEN
];
339 unsigned char src_mac
[ETH_ALEN
];
341 __u32 cur_dst_mac_offset
;
342 __u32 cur_src_mac_offset
;
354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
356 We fill in SRC address later
357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
361 __u16 pad
; /* pad out the hh struct to an even 16 bytes */
363 struct sk_buff
*skb
; /* skb we are to transmit next, used for when we
364 * are transmitting the same one multiple times
366 struct net_device
*odev
; /* The out-going device.
367 * Note that the device should have it's
368 * pg_info pointer pointing back to this
370 * Set when the user specifies the out-going
371 * device name (not when the inject is
372 * started as it used to do.)
375 struct flow_state
*flows
;
376 unsigned cflows
; /* Concurrent flows (config) */
377 unsigned lflow
; /* Flow length (config) */
378 unsigned nflows
; /* accumulated flows (stats) */
379 unsigned curfl
; /* current sequenced flow (state)*/
383 __u32 skb_priority
; /* skb priority field */
384 int node
; /* Memory node */
387 __u8 ipsmode
; /* IPSEC mode (config) */
388 __u8 ipsproto
; /* IPSEC type (config) */
400 static bool pktgen_exiting __read_mostly
;
402 struct pktgen_thread
{
403 spinlock_t if_lock
; /* for list of devices */
404 struct list_head if_list
; /* All device here */
405 struct list_head th_list
;
406 struct task_struct
*tsk
;
409 /* Field for thread to receive "posted" events terminate,
415 wait_queue_head_t queue
;
416 struct completion start_done
;
422 static inline ktime_t
ktime_now(void)
427 return timespec_to_ktime(ts
);
430 /* This works even if 32 bit because of careful byte order choice */
431 static inline int ktime_lt(const ktime_t cmp1
, const ktime_t cmp2
)
433 return cmp1
.tv64
< cmp2
.tv64
;
436 static const char version
[] =
437 "Packet Generator for packet performance testing. "
438 "Version: " VERSION
"\n";
440 static int pktgen_remove_device(struct pktgen_thread
*t
, struct pktgen_dev
*i
);
441 static int pktgen_add_device(struct pktgen_thread
*t
, const char *ifname
);
442 static struct pktgen_dev
*pktgen_find_dev(struct pktgen_thread
*t
,
443 const char *ifname
, bool exact
);
444 static int pktgen_device_event(struct notifier_block
*, unsigned long, void *);
445 static void pktgen_run_all_threads(void);
446 static void pktgen_reset_all_threads(void);
447 static void pktgen_stop_all_threads_ifs(void);
449 static void pktgen_stop(struct pktgen_thread
*t
);
450 static void pktgen_clear_counters(struct pktgen_dev
*pkt_dev
);
452 static unsigned int scan_ip6(const char *s
, char ip
[16]);
453 static unsigned int fmt_ip6(char *s
, const char ip
[16]);
455 /* Module parameters, defaults. */
456 static int pg_count_d __read_mostly
= 1000;
457 static int pg_delay_d __read_mostly
;
458 static int pg_clone_skb_d __read_mostly
;
459 static int debug __read_mostly
;
461 static DEFINE_MUTEX(pktgen_thread_lock
);
462 static LIST_HEAD(pktgen_threads
);
464 static struct notifier_block pktgen_notifier_block
= {
465 .notifier_call
= pktgen_device_event
,
469 * /proc handling functions
473 static int pgctrl_show(struct seq_file
*seq
, void *v
)
475 seq_puts(seq
, version
);
479 static ssize_t
pgctrl_write(struct file
*file
, const char __user
*buf
,
480 size_t count
, loff_t
*ppos
)
485 if (!capable(CAP_NET_ADMIN
)) {
490 if (count
> sizeof(data
))
491 count
= sizeof(data
);
493 if (copy_from_user(data
, buf
, count
)) {
497 data
[count
- 1] = 0; /* Make string */
499 if (!strcmp(data
, "stop"))
500 pktgen_stop_all_threads_ifs();
502 else if (!strcmp(data
, "start"))
503 pktgen_run_all_threads();
505 else if (!strcmp(data
, "reset"))
506 pktgen_reset_all_threads();
509 pr_warning("Unknown command: %s\n", data
);
517 static int pgctrl_open(struct inode
*inode
, struct file
*file
)
519 return single_open(file
, pgctrl_show
, PDE(inode
)->data
);
522 static const struct file_operations pktgen_fops
= {
523 .owner
= THIS_MODULE
,
527 .write
= pgctrl_write
,
528 .release
= single_release
,
531 static int pktgen_if_show(struct seq_file
*seq
, void *v
)
533 const struct pktgen_dev
*pkt_dev
= seq
->private;
538 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
539 (unsigned long long)pkt_dev
->count
, pkt_dev
->min_pkt_size
,
540 pkt_dev
->max_pkt_size
);
543 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
544 pkt_dev
->nfrags
, (unsigned long long) pkt_dev
->delay
,
545 pkt_dev
->clone_skb
, pkt_dev
->odevname
);
547 seq_printf(seq
, " flows: %u flowlen: %u\n", pkt_dev
->cflows
,
551 " queue_map_min: %u queue_map_max: %u\n",
552 pkt_dev
->queue_map_min
,
553 pkt_dev
->queue_map_max
);
555 if (pkt_dev
->skb_priority
)
556 seq_printf(seq
, " skb_priority: %u\n",
557 pkt_dev
->skb_priority
);
559 if (pkt_dev
->flags
& F_IPV6
) {
560 char b1
[128], b2
[128], b3
[128];
561 fmt_ip6(b1
, pkt_dev
->in6_saddr
.s6_addr
);
562 fmt_ip6(b2
, pkt_dev
->min_in6_saddr
.s6_addr
);
563 fmt_ip6(b3
, pkt_dev
->max_in6_saddr
.s6_addr
);
565 " saddr: %s min_saddr: %s max_saddr: %s\n", b1
,
568 fmt_ip6(b1
, pkt_dev
->in6_daddr
.s6_addr
);
569 fmt_ip6(b2
, pkt_dev
->min_in6_daddr
.s6_addr
);
570 fmt_ip6(b3
, pkt_dev
->max_in6_daddr
.s6_addr
);
572 " daddr: %s min_daddr: %s max_daddr: %s\n", b1
,
577 " dst_min: %s dst_max: %s\n",
578 pkt_dev
->dst_min
, pkt_dev
->dst_max
);
580 " src_min: %s src_max: %s\n",
581 pkt_dev
->src_min
, pkt_dev
->src_max
);
584 seq_puts(seq
, " src_mac: ");
586 seq_printf(seq
, "%pM ",
587 is_zero_ether_addr(pkt_dev
->src_mac
) ?
588 pkt_dev
->odev
->dev_addr
: pkt_dev
->src_mac
);
590 seq_printf(seq
, "dst_mac: ");
591 seq_printf(seq
, "%pM\n", pkt_dev
->dst_mac
);
594 " udp_src_min: %d udp_src_max: %d"
595 " udp_dst_min: %d udp_dst_max: %d\n",
596 pkt_dev
->udp_src_min
, pkt_dev
->udp_src_max
,
597 pkt_dev
->udp_dst_min
, pkt_dev
->udp_dst_max
);
600 " src_mac_count: %d dst_mac_count: %d\n",
601 pkt_dev
->src_mac_count
, pkt_dev
->dst_mac_count
);
603 if (pkt_dev
->nr_labels
) {
605 seq_printf(seq
, " mpls: ");
606 for (i
= 0; i
< pkt_dev
->nr_labels
; i
++)
607 seq_printf(seq
, "%08x%s", ntohl(pkt_dev
->labels
[i
]),
608 i
== pkt_dev
->nr_labels
-1 ? "\n" : ", ");
611 if (pkt_dev
->vlan_id
!= 0xffff)
612 seq_printf(seq
, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
613 pkt_dev
->vlan_id
, pkt_dev
->vlan_p
,
616 if (pkt_dev
->svlan_id
!= 0xffff)
617 seq_printf(seq
, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
618 pkt_dev
->svlan_id
, pkt_dev
->svlan_p
,
622 seq_printf(seq
, " tos: 0x%02x\n", pkt_dev
->tos
);
624 if (pkt_dev
->traffic_class
)
625 seq_printf(seq
, " traffic_class: 0x%02x\n", pkt_dev
->traffic_class
);
627 if (pkt_dev
->node
>= 0)
628 seq_printf(seq
, " node: %d\n", pkt_dev
->node
);
630 seq_printf(seq
, " Flags: ");
632 if (pkt_dev
->flags
& F_IPV6
)
633 seq_printf(seq
, "IPV6 ");
635 if (pkt_dev
->flags
& F_IPSRC_RND
)
636 seq_printf(seq
, "IPSRC_RND ");
638 if (pkt_dev
->flags
& F_IPDST_RND
)
639 seq_printf(seq
, "IPDST_RND ");
641 if (pkt_dev
->flags
& F_TXSIZE_RND
)
642 seq_printf(seq
, "TXSIZE_RND ");
644 if (pkt_dev
->flags
& F_UDPSRC_RND
)
645 seq_printf(seq
, "UDPSRC_RND ");
647 if (pkt_dev
->flags
& F_UDPDST_RND
)
648 seq_printf(seq
, "UDPDST_RND ");
650 if (pkt_dev
->flags
& F_MPLS_RND
)
651 seq_printf(seq
, "MPLS_RND ");
653 if (pkt_dev
->flags
& F_QUEUE_MAP_RND
)
654 seq_printf(seq
, "QUEUE_MAP_RND ");
656 if (pkt_dev
->flags
& F_QUEUE_MAP_CPU
)
657 seq_printf(seq
, "QUEUE_MAP_CPU ");
659 if (pkt_dev
->cflows
) {
660 if (pkt_dev
->flags
& F_FLOW_SEQ
)
661 seq_printf(seq
, "FLOW_SEQ "); /*in sequence flows*/
663 seq_printf(seq
, "FLOW_RND ");
667 if (pkt_dev
->flags
& F_IPSEC_ON
)
668 seq_printf(seq
, "IPSEC ");
671 if (pkt_dev
->flags
& F_MACSRC_RND
)
672 seq_printf(seq
, "MACSRC_RND ");
674 if (pkt_dev
->flags
& F_MACDST_RND
)
675 seq_printf(seq
, "MACDST_RND ");
677 if (pkt_dev
->flags
& F_VID_RND
)
678 seq_printf(seq
, "VID_RND ");
680 if (pkt_dev
->flags
& F_SVID_RND
)
681 seq_printf(seq
, "SVID_RND ");
683 if (pkt_dev
->flags
& F_NODE
)
684 seq_printf(seq
, "NODE_ALLOC ");
688 /* not really stopped, more like last-running-at */
689 stopped
= pkt_dev
->running
? ktime_now() : pkt_dev
->stopped_at
;
690 idle
= pkt_dev
->idle_acc
;
691 do_div(idle
, NSEC_PER_USEC
);
694 "Current:\n pkts-sofar: %llu errors: %llu\n",
695 (unsigned long long)pkt_dev
->sofar
,
696 (unsigned long long)pkt_dev
->errors
);
699 " started: %lluus stopped: %lluus idle: %lluus\n",
700 (unsigned long long) ktime_to_us(pkt_dev
->started_at
),
701 (unsigned long long) ktime_to_us(stopped
),
702 (unsigned long long) idle
);
705 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
706 pkt_dev
->seq_num
, pkt_dev
->cur_dst_mac_offset
,
707 pkt_dev
->cur_src_mac_offset
);
709 if (pkt_dev
->flags
& F_IPV6
) {
710 char b1
[128], b2
[128];
711 fmt_ip6(b1
, pkt_dev
->cur_in6_daddr
.s6_addr
);
712 fmt_ip6(b2
, pkt_dev
->cur_in6_saddr
.s6_addr
);
713 seq_printf(seq
, " cur_saddr: %s cur_daddr: %s\n", b2
, b1
);
715 seq_printf(seq
, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
716 pkt_dev
->cur_saddr
, pkt_dev
->cur_daddr
);
718 seq_printf(seq
, " cur_udp_dst: %d cur_udp_src: %d\n",
719 pkt_dev
->cur_udp_dst
, pkt_dev
->cur_udp_src
);
721 seq_printf(seq
, " cur_queue_map: %u\n", pkt_dev
->cur_queue_map
);
723 seq_printf(seq
, " flows: %u\n", pkt_dev
->nflows
);
725 if (pkt_dev
->result
[0])
726 seq_printf(seq
, "Result: %s\n", pkt_dev
->result
);
728 seq_printf(seq
, "Result: Idle\n");
734 static int hex32_arg(const char __user
*user_buffer
, unsigned long maxlen
,
740 for (; i
< maxlen
; i
++) {
744 if (get_user(c
, &user_buffer
[i
]))
746 value
= hex_to_bin(c
);
755 static int count_trail_chars(const char __user
* user_buffer
,
760 for (i
= 0; i
< maxlen
; i
++) {
762 if (get_user(c
, &user_buffer
[i
]))
780 static unsigned long num_arg(const char __user
* user_buffer
,
781 unsigned long maxlen
, unsigned long *num
)
786 for (i
= 0; i
< maxlen
; i
++) {
788 if (get_user(c
, &user_buffer
[i
]))
790 if ((c
>= '0') && (c
<= '9')) {
799 static int strn_len(const char __user
* user_buffer
, unsigned int maxlen
)
803 for (i
= 0; i
< maxlen
; i
++) {
805 if (get_user(c
, &user_buffer
[i
]))
823 static ssize_t
get_labels(const char __user
*buffer
, struct pktgen_dev
*pkt_dev
)
830 pkt_dev
->nr_labels
= 0;
833 len
= hex32_arg(&buffer
[i
], 8, &tmp
);
836 pkt_dev
->labels
[n
] = htonl(tmp
);
837 if (pkt_dev
->labels
[n
] & MPLS_STACK_BOTTOM
)
838 pkt_dev
->flags
|= F_MPLS_RND
;
840 if (get_user(c
, &buffer
[i
]))
844 if (n
>= MAX_MPLS_LABELS
)
848 pkt_dev
->nr_labels
= n
;
852 static ssize_t
pktgen_if_write(struct file
*file
,
853 const char __user
* user_buffer
, size_t count
,
856 struct seq_file
*seq
= file
->private_data
;
857 struct pktgen_dev
*pkt_dev
= seq
->private;
859 char name
[16], valstr
[32];
860 unsigned long value
= 0;
861 char *pg_result
= NULL
;
865 pg_result
= &(pkt_dev
->result
[0]);
868 pr_warning("wrong command format\n");
873 tmp
= count_trail_chars(user_buffer
, max
);
875 pr_warning("illegal format\n");
880 /* Read variable name */
882 len
= strn_len(&user_buffer
[i
], sizeof(name
) - 1);
886 memset(name
, 0, sizeof(name
));
887 if (copy_from_user(name
, &user_buffer
[i
], len
))
892 len
= count_trail_chars(&user_buffer
[i
], max
);
899 size_t copy
= min_t(size_t, count
, 1023);
901 if (copy_from_user(tb
, user_buffer
, copy
))
904 printk(KERN_DEBUG
"pktgen: %s,%lu buffer -:%s:-\n", name
,
905 (unsigned long)count
, tb
);
908 if (!strcmp(name
, "min_pkt_size")) {
909 len
= num_arg(&user_buffer
[i
], 10, &value
);
914 if (value
< 14 + 20 + 8)
916 if (value
!= pkt_dev
->min_pkt_size
) {
917 pkt_dev
->min_pkt_size
= value
;
918 pkt_dev
->cur_pkt_size
= value
;
920 sprintf(pg_result
, "OK: min_pkt_size=%u",
921 pkt_dev
->min_pkt_size
);
925 if (!strcmp(name
, "max_pkt_size")) {
926 len
= num_arg(&user_buffer
[i
], 10, &value
);
931 if (value
< 14 + 20 + 8)
933 if (value
!= pkt_dev
->max_pkt_size
) {
934 pkt_dev
->max_pkt_size
= value
;
935 pkt_dev
->cur_pkt_size
= value
;
937 sprintf(pg_result
, "OK: max_pkt_size=%u",
938 pkt_dev
->max_pkt_size
);
942 /* Shortcut for min = max */
944 if (!strcmp(name
, "pkt_size")) {
945 len
= num_arg(&user_buffer
[i
], 10, &value
);
950 if (value
< 14 + 20 + 8)
952 if (value
!= pkt_dev
->min_pkt_size
) {
953 pkt_dev
->min_pkt_size
= value
;
954 pkt_dev
->max_pkt_size
= value
;
955 pkt_dev
->cur_pkt_size
= value
;
957 sprintf(pg_result
, "OK: pkt_size=%u", pkt_dev
->min_pkt_size
);
961 if (!strcmp(name
, "debug")) {
962 len
= num_arg(&user_buffer
[i
], 10, &value
);
968 sprintf(pg_result
, "OK: debug=%u", debug
);
972 if (!strcmp(name
, "frags")) {
973 len
= num_arg(&user_buffer
[i
], 10, &value
);
978 pkt_dev
->nfrags
= value
;
979 sprintf(pg_result
, "OK: frags=%u", pkt_dev
->nfrags
);
982 if (!strcmp(name
, "delay")) {
983 len
= num_arg(&user_buffer
[i
], 10, &value
);
988 if (value
== 0x7FFFFFFF)
989 pkt_dev
->delay
= ULLONG_MAX
;
991 pkt_dev
->delay
= (u64
)value
;
993 sprintf(pg_result
, "OK: delay=%llu",
994 (unsigned long long) pkt_dev
->delay
);
997 if (!strcmp(name
, "rate")) {
998 len
= num_arg(&user_buffer
[i
], 10, &value
);
1005 pkt_dev
->delay
= pkt_dev
->min_pkt_size
*8*NSEC_PER_USEC
/value
;
1007 pr_info("Delay set at: %llu ns\n", pkt_dev
->delay
);
1009 sprintf(pg_result
, "OK: rate=%lu", value
);
1012 if (!strcmp(name
, "ratep")) {
1013 len
= num_arg(&user_buffer
[i
], 10, &value
);
1020 pkt_dev
->delay
= NSEC_PER_SEC
/value
;
1022 pr_info("Delay set at: %llu ns\n", pkt_dev
->delay
);
1024 sprintf(pg_result
, "OK: rate=%lu", value
);
1027 if (!strcmp(name
, "udp_src_min")) {
1028 len
= num_arg(&user_buffer
[i
], 10, &value
);
1033 if (value
!= pkt_dev
->udp_src_min
) {
1034 pkt_dev
->udp_src_min
= value
;
1035 pkt_dev
->cur_udp_src
= value
;
1037 sprintf(pg_result
, "OK: udp_src_min=%u", pkt_dev
->udp_src_min
);
1040 if (!strcmp(name
, "udp_dst_min")) {
1041 len
= num_arg(&user_buffer
[i
], 10, &value
);
1046 if (value
!= pkt_dev
->udp_dst_min
) {
1047 pkt_dev
->udp_dst_min
= value
;
1048 pkt_dev
->cur_udp_dst
= value
;
1050 sprintf(pg_result
, "OK: udp_dst_min=%u", pkt_dev
->udp_dst_min
);
1053 if (!strcmp(name
, "udp_src_max")) {
1054 len
= num_arg(&user_buffer
[i
], 10, &value
);
1059 if (value
!= pkt_dev
->udp_src_max
) {
1060 pkt_dev
->udp_src_max
= value
;
1061 pkt_dev
->cur_udp_src
= value
;
1063 sprintf(pg_result
, "OK: udp_src_max=%u", pkt_dev
->udp_src_max
);
1066 if (!strcmp(name
, "udp_dst_max")) {
1067 len
= num_arg(&user_buffer
[i
], 10, &value
);
1072 if (value
!= pkt_dev
->udp_dst_max
) {
1073 pkt_dev
->udp_dst_max
= value
;
1074 pkt_dev
->cur_udp_dst
= value
;
1076 sprintf(pg_result
, "OK: udp_dst_max=%u", pkt_dev
->udp_dst_max
);
1079 if (!strcmp(name
, "clone_skb")) {
1080 len
= num_arg(&user_buffer
[i
], 10, &value
);
1085 pkt_dev
->clone_skb
= value
;
1087 sprintf(pg_result
, "OK: clone_skb=%d", pkt_dev
->clone_skb
);
1090 if (!strcmp(name
, "count")) {
1091 len
= num_arg(&user_buffer
[i
], 10, &value
);
1096 pkt_dev
->count
= value
;
1097 sprintf(pg_result
, "OK: count=%llu",
1098 (unsigned long long)pkt_dev
->count
);
1101 if (!strcmp(name
, "src_mac_count")) {
1102 len
= num_arg(&user_buffer
[i
], 10, &value
);
1107 if (pkt_dev
->src_mac_count
!= value
) {
1108 pkt_dev
->src_mac_count
= value
;
1109 pkt_dev
->cur_src_mac_offset
= 0;
1111 sprintf(pg_result
, "OK: src_mac_count=%d",
1112 pkt_dev
->src_mac_count
);
1115 if (!strcmp(name
, "dst_mac_count")) {
1116 len
= num_arg(&user_buffer
[i
], 10, &value
);
1121 if (pkt_dev
->dst_mac_count
!= value
) {
1122 pkt_dev
->dst_mac_count
= value
;
1123 pkt_dev
->cur_dst_mac_offset
= 0;
1125 sprintf(pg_result
, "OK: dst_mac_count=%d",
1126 pkt_dev
->dst_mac_count
);
1129 if (!strcmp(name
, "node")) {
1130 len
= num_arg(&user_buffer
[i
], 10, &value
);
1136 if (node_possible(value
)) {
1137 pkt_dev
->node
= value
;
1138 sprintf(pg_result
, "OK: node=%d", pkt_dev
->node
);
1139 if (pkt_dev
->page
) {
1140 put_page(pkt_dev
->page
);
1141 pkt_dev
->page
= NULL
;
1145 sprintf(pg_result
, "ERROR: node not possible");
1148 if (!strcmp(name
, "flag")) {
1151 len
= strn_len(&user_buffer
[i
], sizeof(f
) - 1);
1155 if (copy_from_user(f
, &user_buffer
[i
], len
))
1158 if (strcmp(f
, "IPSRC_RND") == 0)
1159 pkt_dev
->flags
|= F_IPSRC_RND
;
1161 else if (strcmp(f
, "!IPSRC_RND") == 0)
1162 pkt_dev
->flags
&= ~F_IPSRC_RND
;
1164 else if (strcmp(f
, "TXSIZE_RND") == 0)
1165 pkt_dev
->flags
|= F_TXSIZE_RND
;
1167 else if (strcmp(f
, "!TXSIZE_RND") == 0)
1168 pkt_dev
->flags
&= ~F_TXSIZE_RND
;
1170 else if (strcmp(f
, "IPDST_RND") == 0)
1171 pkt_dev
->flags
|= F_IPDST_RND
;
1173 else if (strcmp(f
, "!IPDST_RND") == 0)
1174 pkt_dev
->flags
&= ~F_IPDST_RND
;
1176 else if (strcmp(f
, "UDPSRC_RND") == 0)
1177 pkt_dev
->flags
|= F_UDPSRC_RND
;
1179 else if (strcmp(f
, "!UDPSRC_RND") == 0)
1180 pkt_dev
->flags
&= ~F_UDPSRC_RND
;
1182 else if (strcmp(f
, "UDPDST_RND") == 0)
1183 pkt_dev
->flags
|= F_UDPDST_RND
;
1185 else if (strcmp(f
, "!UDPDST_RND") == 0)
1186 pkt_dev
->flags
&= ~F_UDPDST_RND
;
1188 else if (strcmp(f
, "MACSRC_RND") == 0)
1189 pkt_dev
->flags
|= F_MACSRC_RND
;
1191 else if (strcmp(f
, "!MACSRC_RND") == 0)
1192 pkt_dev
->flags
&= ~F_MACSRC_RND
;
1194 else if (strcmp(f
, "MACDST_RND") == 0)
1195 pkt_dev
->flags
|= F_MACDST_RND
;
1197 else if (strcmp(f
, "!MACDST_RND") == 0)
1198 pkt_dev
->flags
&= ~F_MACDST_RND
;
1200 else if (strcmp(f
, "MPLS_RND") == 0)
1201 pkt_dev
->flags
|= F_MPLS_RND
;
1203 else if (strcmp(f
, "!MPLS_RND") == 0)
1204 pkt_dev
->flags
&= ~F_MPLS_RND
;
1206 else if (strcmp(f
, "VID_RND") == 0)
1207 pkt_dev
->flags
|= F_VID_RND
;
1209 else if (strcmp(f
, "!VID_RND") == 0)
1210 pkt_dev
->flags
&= ~F_VID_RND
;
1212 else if (strcmp(f
, "SVID_RND") == 0)
1213 pkt_dev
->flags
|= F_SVID_RND
;
1215 else if (strcmp(f
, "!SVID_RND") == 0)
1216 pkt_dev
->flags
&= ~F_SVID_RND
;
1218 else if (strcmp(f
, "FLOW_SEQ") == 0)
1219 pkt_dev
->flags
|= F_FLOW_SEQ
;
1221 else if (strcmp(f
, "QUEUE_MAP_RND") == 0)
1222 pkt_dev
->flags
|= F_QUEUE_MAP_RND
;
1224 else if (strcmp(f
, "!QUEUE_MAP_RND") == 0)
1225 pkt_dev
->flags
&= ~F_QUEUE_MAP_RND
;
1227 else if (strcmp(f
, "QUEUE_MAP_CPU") == 0)
1228 pkt_dev
->flags
|= F_QUEUE_MAP_CPU
;
1230 else if (strcmp(f
, "!QUEUE_MAP_CPU") == 0)
1231 pkt_dev
->flags
&= ~F_QUEUE_MAP_CPU
;
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
;
1240 else if (strcmp(f
, "NODE_ALLOC") == 0)
1241 pkt_dev
->flags
|= F_NODE
;
1243 else if (strcmp(f
, "!NODE_ALLOC") == 0)
1244 pkt_dev
->flags
&= ~F_NODE
;
1248 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1250 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1251 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1254 sprintf(pg_result
, "OK: flags=0x%x", pkt_dev
->flags
);
1257 if (!strcmp(name
, "dst_min") || !strcmp(name
, "dst")) {
1258 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->dst_min
) - 1);
1262 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1265 if (strcmp(buf
, pkt_dev
->dst_min
) != 0) {
1266 memset(pkt_dev
->dst_min
, 0, sizeof(pkt_dev
->dst_min
));
1267 strncpy(pkt_dev
->dst_min
, buf
, len
);
1268 pkt_dev
->daddr_min
= in_aton(pkt_dev
->dst_min
);
1269 pkt_dev
->cur_daddr
= pkt_dev
->daddr_min
;
1272 printk(KERN_DEBUG
"pktgen: dst_min set to: %s\n",
1275 sprintf(pg_result
, "OK: dst_min=%s", pkt_dev
->dst_min
);
1278 if (!strcmp(name
, "dst_max")) {
1279 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->dst_max
) - 1);
1284 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1288 if (strcmp(buf
, pkt_dev
->dst_max
) != 0) {
1289 memset(pkt_dev
->dst_max
, 0, sizeof(pkt_dev
->dst_max
));
1290 strncpy(pkt_dev
->dst_max
, buf
, len
);
1291 pkt_dev
->daddr_max
= in_aton(pkt_dev
->dst_max
);
1292 pkt_dev
->cur_daddr
= pkt_dev
->daddr_max
;
1295 printk(KERN_DEBUG
"pktgen: dst_max set to: %s\n",
1298 sprintf(pg_result
, "OK: dst_max=%s", pkt_dev
->dst_max
);
1301 if (!strcmp(name
, "dst6")) {
1302 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1306 pkt_dev
->flags
|= F_IPV6
;
1308 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1312 scan_ip6(buf
, pkt_dev
->in6_daddr
.s6_addr
);
1313 fmt_ip6(buf
, pkt_dev
->in6_daddr
.s6_addr
);
1315 ipv6_addr_copy(&pkt_dev
->cur_in6_daddr
, &pkt_dev
->in6_daddr
);
1318 printk(KERN_DEBUG
"pktgen: dst6 set to: %s\n", buf
);
1321 sprintf(pg_result
, "OK: dst6=%s", buf
);
1324 if (!strcmp(name
, "dst6_min")) {
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
->min_in6_daddr
.s6_addr
);
1336 fmt_ip6(buf
, pkt_dev
->min_in6_daddr
.s6_addr
);
1338 ipv6_addr_copy(&pkt_dev
->cur_in6_daddr
,
1339 &pkt_dev
->min_in6_daddr
);
1341 printk(KERN_DEBUG
"pktgen: dst6_min set to: %s\n", buf
);
1344 sprintf(pg_result
, "OK: dst6_min=%s", buf
);
1347 if (!strcmp(name
, "dst6_max")) {
1348 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1352 pkt_dev
->flags
|= F_IPV6
;
1354 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1358 scan_ip6(buf
, pkt_dev
->max_in6_daddr
.s6_addr
);
1359 fmt_ip6(buf
, pkt_dev
->max_in6_daddr
.s6_addr
);
1362 printk(KERN_DEBUG
"pktgen: dst6_max set to: %s\n", buf
);
1365 sprintf(pg_result
, "OK: dst6_max=%s", buf
);
1368 if (!strcmp(name
, "src6")) {
1369 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1373 pkt_dev
->flags
|= F_IPV6
;
1375 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1379 scan_ip6(buf
, pkt_dev
->in6_saddr
.s6_addr
);
1380 fmt_ip6(buf
, pkt_dev
->in6_saddr
.s6_addr
);
1382 ipv6_addr_copy(&pkt_dev
->cur_in6_saddr
, &pkt_dev
->in6_saddr
);
1385 printk(KERN_DEBUG
"pktgen: src6 set to: %s\n", buf
);
1388 sprintf(pg_result
, "OK: src6=%s", buf
);
1391 if (!strcmp(name
, "src_min")) {
1392 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->src_min
) - 1);
1396 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1399 if (strcmp(buf
, pkt_dev
->src_min
) != 0) {
1400 memset(pkt_dev
->src_min
, 0, sizeof(pkt_dev
->src_min
));
1401 strncpy(pkt_dev
->src_min
, buf
, len
);
1402 pkt_dev
->saddr_min
= in_aton(pkt_dev
->src_min
);
1403 pkt_dev
->cur_saddr
= pkt_dev
->saddr_min
;
1406 printk(KERN_DEBUG
"pktgen: src_min set to: %s\n",
1409 sprintf(pg_result
, "OK: src_min=%s", pkt_dev
->src_min
);
1412 if (!strcmp(name
, "src_max")) {
1413 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->src_max
) - 1);
1417 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1420 if (strcmp(buf
, pkt_dev
->src_max
) != 0) {
1421 memset(pkt_dev
->src_max
, 0, sizeof(pkt_dev
->src_max
));
1422 strncpy(pkt_dev
->src_max
, buf
, len
);
1423 pkt_dev
->saddr_max
= in_aton(pkt_dev
->src_max
);
1424 pkt_dev
->cur_saddr
= pkt_dev
->saddr_max
;
1427 printk(KERN_DEBUG
"pktgen: src_max set to: %s\n",
1430 sprintf(pg_result
, "OK: src_max=%s", pkt_dev
->src_max
);
1433 if (!strcmp(name
, "dst_mac")) {
1435 unsigned char old_dmac
[ETH_ALEN
];
1436 unsigned char *m
= pkt_dev
->dst_mac
;
1437 memcpy(old_dmac
, pkt_dev
->dst_mac
, ETH_ALEN
);
1439 len
= strn_len(&user_buffer
[i
], sizeof(valstr
) - 1);
1443 memset(valstr
, 0, sizeof(valstr
));
1444 if (copy_from_user(valstr
, &user_buffer
[i
], len
))
1448 for (*m
= 0; *v
&& m
< pkt_dev
->dst_mac
+ 6; v
++) {
1451 value
= hex_to_bin(*v
);
1453 *m
= *m
* 16 + value
;
1461 /* Set up Dest MAC */
1462 if (compare_ether_addr(old_dmac
, pkt_dev
->dst_mac
))
1463 memcpy(&(pkt_dev
->hh
[0]), pkt_dev
->dst_mac
, ETH_ALEN
);
1465 sprintf(pg_result
, "OK: dstmac");
1468 if (!strcmp(name
, "src_mac")) {
1470 unsigned char old_smac
[ETH_ALEN
];
1471 unsigned char *m
= pkt_dev
->src_mac
;
1473 memcpy(old_smac
, pkt_dev
->src_mac
, ETH_ALEN
);
1475 len
= strn_len(&user_buffer
[i
], sizeof(valstr
) - 1);
1479 memset(valstr
, 0, sizeof(valstr
));
1480 if (copy_from_user(valstr
, &user_buffer
[i
], len
))
1484 for (*m
= 0; *v
&& m
< pkt_dev
->src_mac
+ 6; v
++) {
1487 value
= hex_to_bin(*v
);
1489 *m
= *m
* 16 + value
;
1497 /* Set up Src MAC */
1498 if (compare_ether_addr(old_smac
, pkt_dev
->src_mac
))
1499 memcpy(&(pkt_dev
->hh
[6]), pkt_dev
->src_mac
, ETH_ALEN
);
1501 sprintf(pg_result
, "OK: srcmac");
1505 if (!strcmp(name
, "clear_counters")) {
1506 pktgen_clear_counters(pkt_dev
);
1507 sprintf(pg_result
, "OK: Clearing counters.\n");
1511 if (!strcmp(name
, "flows")) {
1512 len
= num_arg(&user_buffer
[i
], 10, &value
);
1517 if (value
> MAX_CFLOWS
)
1520 pkt_dev
->cflows
= value
;
1521 sprintf(pg_result
, "OK: flows=%u", pkt_dev
->cflows
);
1525 if (!strcmp(name
, "flowlen")) {
1526 len
= num_arg(&user_buffer
[i
], 10, &value
);
1531 pkt_dev
->lflow
= value
;
1532 sprintf(pg_result
, "OK: flowlen=%u", pkt_dev
->lflow
);
1536 if (!strcmp(name
, "queue_map_min")) {
1537 len
= num_arg(&user_buffer
[i
], 5, &value
);
1542 pkt_dev
->queue_map_min
= value
;
1543 sprintf(pg_result
, "OK: queue_map_min=%u", pkt_dev
->queue_map_min
);
1547 if (!strcmp(name
, "queue_map_max")) {
1548 len
= num_arg(&user_buffer
[i
], 5, &value
);
1553 pkt_dev
->queue_map_max
= value
;
1554 sprintf(pg_result
, "OK: queue_map_max=%u", pkt_dev
->queue_map_max
);
1558 if (!strcmp(name
, "mpls")) {
1561 len
= get_labels(&user_buffer
[i
], pkt_dev
);
1565 cnt
= sprintf(pg_result
, "OK: mpls=");
1566 for (n
= 0; n
< pkt_dev
->nr_labels
; n
++)
1567 cnt
+= sprintf(pg_result
+ cnt
,
1568 "%08x%s", ntohl(pkt_dev
->labels
[n
]),
1569 n
== pkt_dev
->nr_labels
-1 ? "" : ",");
1571 if (pkt_dev
->nr_labels
&& pkt_dev
->vlan_id
!= 0xffff) {
1572 pkt_dev
->vlan_id
= 0xffff; /* turn off VLAN/SVLAN */
1573 pkt_dev
->svlan_id
= 0xffff;
1576 printk(KERN_DEBUG
"pktgen: VLAN/SVLAN auto turned off\n");
1581 if (!strcmp(name
, "vlan_id")) {
1582 len
= num_arg(&user_buffer
[i
], 4, &value
);
1587 if (value
<= 4095) {
1588 pkt_dev
->vlan_id
= value
; /* turn on VLAN */
1591 printk(KERN_DEBUG
"pktgen: VLAN turned on\n");
1593 if (debug
&& pkt_dev
->nr_labels
)
1594 printk(KERN_DEBUG
"pktgen: MPLS auto turned off\n");
1596 pkt_dev
->nr_labels
= 0; /* turn off MPLS */
1597 sprintf(pg_result
, "OK: vlan_id=%u", pkt_dev
->vlan_id
);
1599 pkt_dev
->vlan_id
= 0xffff; /* turn off VLAN/SVLAN */
1600 pkt_dev
->svlan_id
= 0xffff;
1603 printk(KERN_DEBUG
"pktgen: VLAN/SVLAN turned off\n");
1608 if (!strcmp(name
, "vlan_p")) {
1609 len
= num_arg(&user_buffer
[i
], 1, &value
);
1614 if ((value
<= 7) && (pkt_dev
->vlan_id
!= 0xffff)) {
1615 pkt_dev
->vlan_p
= value
;
1616 sprintf(pg_result
, "OK: vlan_p=%u", pkt_dev
->vlan_p
);
1618 sprintf(pg_result
, "ERROR: vlan_p must be 0-7");
1623 if (!strcmp(name
, "vlan_cfi")) {
1624 len
= num_arg(&user_buffer
[i
], 1, &value
);
1629 if ((value
<= 1) && (pkt_dev
->vlan_id
!= 0xffff)) {
1630 pkt_dev
->vlan_cfi
= value
;
1631 sprintf(pg_result
, "OK: vlan_cfi=%u", pkt_dev
->vlan_cfi
);
1633 sprintf(pg_result
, "ERROR: vlan_cfi must be 0-1");
1638 if (!strcmp(name
, "svlan_id")) {
1639 len
= num_arg(&user_buffer
[i
], 4, &value
);
1644 if ((value
<= 4095) && ((pkt_dev
->vlan_id
!= 0xffff))) {
1645 pkt_dev
->svlan_id
= value
; /* turn on SVLAN */
1648 printk(KERN_DEBUG
"pktgen: SVLAN turned on\n");
1650 if (debug
&& pkt_dev
->nr_labels
)
1651 printk(KERN_DEBUG
"pktgen: MPLS auto turned off\n");
1653 pkt_dev
->nr_labels
= 0; /* turn off MPLS */
1654 sprintf(pg_result
, "OK: svlan_id=%u", pkt_dev
->svlan_id
);
1656 pkt_dev
->vlan_id
= 0xffff; /* turn off VLAN/SVLAN */
1657 pkt_dev
->svlan_id
= 0xffff;
1660 printk(KERN_DEBUG
"pktgen: VLAN/SVLAN turned off\n");
1665 if (!strcmp(name
, "svlan_p")) {
1666 len
= num_arg(&user_buffer
[i
], 1, &value
);
1671 if ((value
<= 7) && (pkt_dev
->svlan_id
!= 0xffff)) {
1672 pkt_dev
->svlan_p
= value
;
1673 sprintf(pg_result
, "OK: svlan_p=%u", pkt_dev
->svlan_p
);
1675 sprintf(pg_result
, "ERROR: svlan_p must be 0-7");
1680 if (!strcmp(name
, "svlan_cfi")) {
1681 len
= num_arg(&user_buffer
[i
], 1, &value
);
1686 if ((value
<= 1) && (pkt_dev
->svlan_id
!= 0xffff)) {
1687 pkt_dev
->svlan_cfi
= value
;
1688 sprintf(pg_result
, "OK: svlan_cfi=%u", pkt_dev
->svlan_cfi
);
1690 sprintf(pg_result
, "ERROR: svlan_cfi must be 0-1");
1695 if (!strcmp(name
, "tos")) {
1696 __u32 tmp_value
= 0;
1697 len
= hex32_arg(&user_buffer
[i
], 2, &tmp_value
);
1703 pkt_dev
->tos
= tmp_value
;
1704 sprintf(pg_result
, "OK: tos=0x%02x", pkt_dev
->tos
);
1706 sprintf(pg_result
, "ERROR: tos must be 00-ff");
1711 if (!strcmp(name
, "traffic_class")) {
1712 __u32 tmp_value
= 0;
1713 len
= hex32_arg(&user_buffer
[i
], 2, &tmp_value
);
1719 pkt_dev
->traffic_class
= tmp_value
;
1720 sprintf(pg_result
, "OK: traffic_class=0x%02x", pkt_dev
->traffic_class
);
1722 sprintf(pg_result
, "ERROR: traffic_class must be 00-ff");
1727 if (!strcmp(name
, "skb_priority")) {
1728 len
= num_arg(&user_buffer
[i
], 9, &value
);
1733 pkt_dev
->skb_priority
= value
;
1734 sprintf(pg_result
, "OK: skb_priority=%i",
1735 pkt_dev
->skb_priority
);
1739 sprintf(pkt_dev
->result
, "No such parameter \"%s\"", name
);
1743 static int pktgen_if_open(struct inode
*inode
, struct file
*file
)
1745 return single_open(file
, pktgen_if_show
, PDE(inode
)->data
);
1748 static const struct file_operations pktgen_if_fops
= {
1749 .owner
= THIS_MODULE
,
1750 .open
= pktgen_if_open
,
1752 .llseek
= seq_lseek
,
1753 .write
= pktgen_if_write
,
1754 .release
= single_release
,
1757 static int pktgen_thread_show(struct seq_file
*seq
, void *v
)
1759 struct pktgen_thread
*t
= seq
->private;
1760 const struct pktgen_dev
*pkt_dev
;
1764 seq_printf(seq
, "Running: ");
1767 list_for_each_entry(pkt_dev
, &t
->if_list
, list
)
1768 if (pkt_dev
->running
)
1769 seq_printf(seq
, "%s ", pkt_dev
->odevname
);
1771 seq_printf(seq
, "\nStopped: ");
1773 list_for_each_entry(pkt_dev
, &t
->if_list
, list
)
1774 if (!pkt_dev
->running
)
1775 seq_printf(seq
, "%s ", pkt_dev
->odevname
);
1778 seq_printf(seq
, "\nResult: %s\n", t
->result
);
1780 seq_printf(seq
, "\nResult: NA\n");
1787 static ssize_t
pktgen_thread_write(struct file
*file
,
1788 const char __user
* user_buffer
,
1789 size_t count
, loff_t
* offset
)
1791 struct seq_file
*seq
= file
->private_data
;
1792 struct pktgen_thread
*t
= seq
->private;
1793 int i
, max
, len
, ret
;
1798 // sprintf(pg_result, "Wrong command format");
1803 len
= count_trail_chars(user_buffer
, max
);
1809 /* Read variable name */
1811 len
= strn_len(&user_buffer
[i
], sizeof(name
) - 1);
1815 memset(name
, 0, sizeof(name
));
1816 if (copy_from_user(name
, &user_buffer
[i
], len
))
1821 len
= count_trail_chars(&user_buffer
[i
], max
);
1828 printk(KERN_DEBUG
"pktgen: t=%s, count=%lu\n",
1829 name
, (unsigned long)count
);
1832 pr_err("ERROR: No thread\n");
1837 pg_result
= &(t
->result
[0]);
1839 if (!strcmp(name
, "add_device")) {
1842 len
= strn_len(&user_buffer
[i
], sizeof(f
) - 1);
1847 if (copy_from_user(f
, &user_buffer
[i
], len
))
1850 mutex_lock(&pktgen_thread_lock
);
1851 pktgen_add_device(t
, f
);
1852 mutex_unlock(&pktgen_thread_lock
);
1854 sprintf(pg_result
, "OK: add_device=%s", f
);
1858 if (!strcmp(name
, "rem_device_all")) {
1859 mutex_lock(&pktgen_thread_lock
);
1860 t
->control
|= T_REMDEVALL
;
1861 mutex_unlock(&pktgen_thread_lock
);
1862 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1864 sprintf(pg_result
, "OK: rem_device_all");
1868 if (!strcmp(name
, "max_before_softirq")) {
1869 sprintf(pg_result
, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1879 static int pktgen_thread_open(struct inode
*inode
, struct file
*file
)
1881 return single_open(file
, pktgen_thread_show
, PDE(inode
)->data
);
1884 static const struct file_operations pktgen_thread_fops
= {
1885 .owner
= THIS_MODULE
,
1886 .open
= pktgen_thread_open
,
1888 .llseek
= seq_lseek
,
1889 .write
= pktgen_thread_write
,
1890 .release
= single_release
,
1893 /* Think find or remove for NN */
1894 static struct pktgen_dev
*__pktgen_NN_threads(const char *ifname
, int remove
)
1896 struct pktgen_thread
*t
;
1897 struct pktgen_dev
*pkt_dev
= NULL
;
1898 bool exact
= (remove
== FIND
);
1900 list_for_each_entry(t
, &pktgen_threads
, th_list
) {
1901 pkt_dev
= pktgen_find_dev(t
, ifname
, exact
);
1905 pkt_dev
->removal_mark
= 1;
1906 t
->control
|= T_REMDEV
;
1916 * mark a device for removal
1918 static void pktgen_mark_device(const char *ifname
)
1920 struct pktgen_dev
*pkt_dev
= NULL
;
1921 const int max_tries
= 10, msec_per_try
= 125;
1924 mutex_lock(&pktgen_thread_lock
);
1925 pr_debug("%s: marking %s for removal\n", __func__
, ifname
);
1929 pkt_dev
= __pktgen_NN_threads(ifname
, REMOVE
);
1930 if (pkt_dev
== NULL
)
1931 break; /* success */
1933 mutex_unlock(&pktgen_thread_lock
);
1934 pr_debug("%s: waiting for %s to disappear....\n",
1936 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try
));
1937 mutex_lock(&pktgen_thread_lock
);
1939 if (++i
>= max_tries
) {
1940 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1941 __func__
, msec_per_try
* i
, ifname
);
1947 mutex_unlock(&pktgen_thread_lock
);
1950 static void pktgen_change_name(struct net_device
*dev
)
1952 struct pktgen_thread
*t
;
1954 list_for_each_entry(t
, &pktgen_threads
, th_list
) {
1955 struct pktgen_dev
*pkt_dev
;
1957 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
1958 if (pkt_dev
->odev
!= dev
)
1961 remove_proc_entry(pkt_dev
->entry
->name
, pg_proc_dir
);
1963 pkt_dev
->entry
= proc_create_data(dev
->name
, 0600,
1967 if (!pkt_dev
->entry
)
1968 pr_err("can't move proc entry for '%s'\n",
1975 static int pktgen_device_event(struct notifier_block
*unused
,
1976 unsigned long event
, void *ptr
)
1978 struct net_device
*dev
= ptr
;
1980 if (!net_eq(dev_net(dev
), &init_net
))
1983 /* It is OK that we do not hold the group lock right now,
1984 * as we run under the RTNL lock.
1988 case NETDEV_CHANGENAME
:
1989 pktgen_change_name(dev
);
1992 case NETDEV_UNREGISTER
:
1993 pktgen_mark_device(dev
->name
);
2000 static struct net_device
*pktgen_dev_get_by_name(struct pktgen_dev
*pkt_dev
,
2006 for (i
= 0; ifname
[i
] != '@'; i
++) {
2014 return dev_get_by_name(&init_net
, b
);
2018 /* Associate pktgen_dev with a device. */
2020 static int pktgen_setup_dev(struct pktgen_dev
*pkt_dev
, const char *ifname
)
2022 struct net_device
*odev
;
2025 /* Clean old setups */
2026 if (pkt_dev
->odev
) {
2027 dev_put(pkt_dev
->odev
);
2028 pkt_dev
->odev
= NULL
;
2031 odev
= pktgen_dev_get_by_name(pkt_dev
, ifname
);
2033 pr_err("no such netdevice: \"%s\"\n", ifname
);
2037 if (odev
->type
!= ARPHRD_ETHER
) {
2038 pr_err("not an ethernet device: \"%s\"\n", ifname
);
2040 } else if (!netif_running(odev
)) {
2041 pr_err("device is down: \"%s\"\n", ifname
);
2044 pkt_dev
->odev
= odev
;
2052 /* Read pkt_dev from the interface and set up internal pktgen_dev
2053 * structure to have the right information to create/send packets
2055 static void pktgen_setup_inject(struct pktgen_dev
*pkt_dev
)
2059 if (!pkt_dev
->odev
) {
2060 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2061 sprintf(pkt_dev
->result
,
2062 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2066 /* make sure that we don't pick a non-existing transmit queue */
2067 ntxq
= pkt_dev
->odev
->real_num_tx_queues
;
2069 if (ntxq
<= pkt_dev
->queue_map_min
) {
2070 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2071 pkt_dev
->queue_map_min
, (ntxq
?: 1) - 1, ntxq
,
2073 pkt_dev
->queue_map_min
= ntxq
- 1;
2075 if (pkt_dev
->queue_map_max
>= ntxq
) {
2076 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2077 pkt_dev
->queue_map_max
, (ntxq
?: 1) - 1, ntxq
,
2079 pkt_dev
->queue_map_max
= ntxq
- 1;
2082 /* Default to the interface's mac if not explicitly set. */
2084 if (is_zero_ether_addr(pkt_dev
->src_mac
))
2085 memcpy(&(pkt_dev
->hh
[6]), pkt_dev
->odev
->dev_addr
, ETH_ALEN
);
2087 /* Set up Dest MAC */
2088 memcpy(&(pkt_dev
->hh
[0]), pkt_dev
->dst_mac
, ETH_ALEN
);
2090 /* Set up pkt size */
2091 pkt_dev
->cur_pkt_size
= pkt_dev
->min_pkt_size
;
2093 if (pkt_dev
->flags
& F_IPV6
) {
2095 * Skip this automatic address setting until locks or functions
2100 int i
, set
= 0, err
= 1;
2101 struct inet6_dev
*idev
;
2103 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
2104 if (pkt_dev
->cur_in6_saddr
.s6_addr
[i
]) {
2112 * Use linklevel address if unconfigured.
2114 * use ipv6_get_lladdr if/when it's get exported
2118 idev
= __in6_dev_get(pkt_dev
->odev
);
2120 struct inet6_ifaddr
*ifp
;
2122 read_lock_bh(&idev
->lock
);
2123 for (ifp
= idev
->addr_list
; ifp
;
2124 ifp
= ifp
->if_next
) {
2125 if (ifp
->scope
== IFA_LINK
&&
2126 !(ifp
->flags
& IFA_F_TENTATIVE
)) {
2127 ipv6_addr_copy(&pkt_dev
->
2134 read_unlock_bh(&idev
->lock
);
2138 pr_err("ERROR: IPv6 link address not available\n");
2142 pkt_dev
->saddr_min
= 0;
2143 pkt_dev
->saddr_max
= 0;
2144 if (strlen(pkt_dev
->src_min
) == 0) {
2146 struct in_device
*in_dev
;
2149 in_dev
= __in_dev_get_rcu(pkt_dev
->odev
);
2151 if (in_dev
->ifa_list
) {
2152 pkt_dev
->saddr_min
=
2153 in_dev
->ifa_list
->ifa_address
;
2154 pkt_dev
->saddr_max
= pkt_dev
->saddr_min
;
2159 pkt_dev
->saddr_min
= in_aton(pkt_dev
->src_min
);
2160 pkt_dev
->saddr_max
= in_aton(pkt_dev
->src_max
);
2163 pkt_dev
->daddr_min
= in_aton(pkt_dev
->dst_min
);
2164 pkt_dev
->daddr_max
= in_aton(pkt_dev
->dst_max
);
2166 /* Initialize current values. */
2167 pkt_dev
->cur_dst_mac_offset
= 0;
2168 pkt_dev
->cur_src_mac_offset
= 0;
2169 pkt_dev
->cur_saddr
= pkt_dev
->saddr_min
;
2170 pkt_dev
->cur_daddr
= pkt_dev
->daddr_min
;
2171 pkt_dev
->cur_udp_dst
= pkt_dev
->udp_dst_min
;
2172 pkt_dev
->cur_udp_src
= pkt_dev
->udp_src_min
;
2173 pkt_dev
->nflows
= 0;
2177 static void spin(struct pktgen_dev
*pkt_dev
, ktime_t spin_until
)
2179 ktime_t start_time
, end_time
;
2181 struct hrtimer_sleeper t
;
2183 hrtimer_init_on_stack(&t
.timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_ABS
);
2184 hrtimer_set_expires(&t
.timer
, spin_until
);
2186 remaining
= ktime_to_ns(hrtimer_expires_remaining(&t
.timer
));
2187 if (remaining
<= 0) {
2188 pkt_dev
->next_tx
= ktime_add_ns(spin_until
, pkt_dev
->delay
);
2192 start_time
= ktime_now();
2193 if (remaining
< 100000)
2194 ndelay(remaining
); /* really small just spin */
2196 /* see do_nanosleep */
2197 hrtimer_init_sleeper(&t
, current
);
2199 set_current_state(TASK_INTERRUPTIBLE
);
2200 hrtimer_start_expires(&t
.timer
, HRTIMER_MODE_ABS
);
2201 if (!hrtimer_active(&t
.timer
))
2207 hrtimer_cancel(&t
.timer
);
2208 } while (t
.task
&& pkt_dev
->running
&& !signal_pending(current
));
2209 __set_current_state(TASK_RUNNING
);
2211 end_time
= ktime_now();
2213 pkt_dev
->idle_acc
+= ktime_to_ns(ktime_sub(end_time
, start_time
));
2214 pkt_dev
->next_tx
= ktime_add_ns(spin_until
, pkt_dev
->delay
);
2217 static inline void set_pkt_overhead(struct pktgen_dev
*pkt_dev
)
2219 pkt_dev
->pkt_overhead
= 0;
2220 pkt_dev
->pkt_overhead
+= pkt_dev
->nr_labels
*sizeof(u32
);
2221 pkt_dev
->pkt_overhead
+= VLAN_TAG_SIZE(pkt_dev
);
2222 pkt_dev
->pkt_overhead
+= SVLAN_TAG_SIZE(pkt_dev
);
2225 static inline int f_seen(const struct pktgen_dev
*pkt_dev
, int flow
)
2227 return !!(pkt_dev
->flows
[flow
].flags
& F_INIT
);
2230 static inline int f_pick(struct pktgen_dev
*pkt_dev
)
2232 int flow
= pkt_dev
->curfl
;
2234 if (pkt_dev
->flags
& F_FLOW_SEQ
) {
2235 if (pkt_dev
->flows
[flow
].count
>= pkt_dev
->lflow
) {
2237 pkt_dev
->flows
[flow
].count
= 0;
2238 pkt_dev
->flows
[flow
].flags
= 0;
2239 pkt_dev
->curfl
+= 1;
2240 if (pkt_dev
->curfl
>= pkt_dev
->cflows
)
2241 pkt_dev
->curfl
= 0; /*reset */
2244 flow
= random32() % pkt_dev
->cflows
;
2245 pkt_dev
->curfl
= flow
;
2247 if (pkt_dev
->flows
[flow
].count
> pkt_dev
->lflow
) {
2248 pkt_dev
->flows
[flow
].count
= 0;
2249 pkt_dev
->flows
[flow
].flags
= 0;
2253 return pkt_dev
->curfl
;
2258 /* If there was already an IPSEC SA, we keep it as is, else
2259 * we go look for it ...
2261 #define DUMMY_MARK 0
2262 static void get_ipsec_sa(struct pktgen_dev
*pkt_dev
, int flow
)
2264 struct xfrm_state
*x
= pkt_dev
->flows
[flow
].x
;
2266 /*slow path: we dont already have xfrm_state*/
2267 x
= xfrm_stateonly_find(&init_net
, DUMMY_MARK
,
2268 (xfrm_address_t
*)&pkt_dev
->cur_daddr
,
2269 (xfrm_address_t
*)&pkt_dev
->cur_saddr
,
2272 pkt_dev
->ipsproto
, 0);
2274 pkt_dev
->flows
[flow
].x
= x
;
2275 set_pkt_overhead(pkt_dev
);
2276 pkt_dev
->pkt_overhead
+= x
->props
.header_len
;
2282 static void set_cur_queue_map(struct pktgen_dev
*pkt_dev
)
2285 if (pkt_dev
->flags
& F_QUEUE_MAP_CPU
)
2286 pkt_dev
->cur_queue_map
= smp_processor_id();
2288 else if (pkt_dev
->queue_map_min
<= pkt_dev
->queue_map_max
) {
2290 if (pkt_dev
->flags
& F_QUEUE_MAP_RND
) {
2292 (pkt_dev
->queue_map_max
-
2293 pkt_dev
->queue_map_min
+ 1)
2294 + pkt_dev
->queue_map_min
;
2296 t
= pkt_dev
->cur_queue_map
+ 1;
2297 if (t
> pkt_dev
->queue_map_max
)
2298 t
= pkt_dev
->queue_map_min
;
2300 pkt_dev
->cur_queue_map
= t
;
2302 pkt_dev
->cur_queue_map
= pkt_dev
->cur_queue_map
% pkt_dev
->odev
->real_num_tx_queues
;
2305 /* Increment/randomize headers according to flags and current values
2306 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2308 static void mod_cur_headers(struct pktgen_dev
*pkt_dev
)
2314 if (pkt_dev
->cflows
)
2315 flow
= f_pick(pkt_dev
);
2317 /* Deal with source MAC */
2318 if (pkt_dev
->src_mac_count
> 1) {
2322 if (pkt_dev
->flags
& F_MACSRC_RND
)
2323 mc
= random32() % pkt_dev
->src_mac_count
;
2325 mc
= pkt_dev
->cur_src_mac_offset
++;
2326 if (pkt_dev
->cur_src_mac_offset
>=
2327 pkt_dev
->src_mac_count
)
2328 pkt_dev
->cur_src_mac_offset
= 0;
2331 tmp
= pkt_dev
->src_mac
[5] + (mc
& 0xFF);
2332 pkt_dev
->hh
[11] = tmp
;
2333 tmp
= (pkt_dev
->src_mac
[4] + ((mc
>> 8) & 0xFF) + (tmp
>> 8));
2334 pkt_dev
->hh
[10] = tmp
;
2335 tmp
= (pkt_dev
->src_mac
[3] + ((mc
>> 16) & 0xFF) + (tmp
>> 8));
2336 pkt_dev
->hh
[9] = tmp
;
2337 tmp
= (pkt_dev
->src_mac
[2] + ((mc
>> 24) & 0xFF) + (tmp
>> 8));
2338 pkt_dev
->hh
[8] = tmp
;
2339 tmp
= (pkt_dev
->src_mac
[1] + (tmp
>> 8));
2340 pkt_dev
->hh
[7] = tmp
;
2343 /* Deal with Destination MAC */
2344 if (pkt_dev
->dst_mac_count
> 1) {
2348 if (pkt_dev
->flags
& F_MACDST_RND
)
2349 mc
= random32() % pkt_dev
->dst_mac_count
;
2352 mc
= pkt_dev
->cur_dst_mac_offset
++;
2353 if (pkt_dev
->cur_dst_mac_offset
>=
2354 pkt_dev
->dst_mac_count
) {
2355 pkt_dev
->cur_dst_mac_offset
= 0;
2359 tmp
= pkt_dev
->dst_mac
[5] + (mc
& 0xFF);
2360 pkt_dev
->hh
[5] = tmp
;
2361 tmp
= (pkt_dev
->dst_mac
[4] + ((mc
>> 8) & 0xFF) + (tmp
>> 8));
2362 pkt_dev
->hh
[4] = tmp
;
2363 tmp
= (pkt_dev
->dst_mac
[3] + ((mc
>> 16) & 0xFF) + (tmp
>> 8));
2364 pkt_dev
->hh
[3] = tmp
;
2365 tmp
= (pkt_dev
->dst_mac
[2] + ((mc
>> 24) & 0xFF) + (tmp
>> 8));
2366 pkt_dev
->hh
[2] = tmp
;
2367 tmp
= (pkt_dev
->dst_mac
[1] + (tmp
>> 8));
2368 pkt_dev
->hh
[1] = tmp
;
2371 if (pkt_dev
->flags
& F_MPLS_RND
) {
2373 for (i
= 0; i
< pkt_dev
->nr_labels
; i
++)
2374 if (pkt_dev
->labels
[i
] & MPLS_STACK_BOTTOM
)
2375 pkt_dev
->labels
[i
] = MPLS_STACK_BOTTOM
|
2376 ((__force __be32
)random32() &
2380 if ((pkt_dev
->flags
& F_VID_RND
) && (pkt_dev
->vlan_id
!= 0xffff)) {
2381 pkt_dev
->vlan_id
= random32() & (4096-1);
2384 if ((pkt_dev
->flags
& F_SVID_RND
) && (pkt_dev
->svlan_id
!= 0xffff)) {
2385 pkt_dev
->svlan_id
= random32() & (4096 - 1);
2388 if (pkt_dev
->udp_src_min
< pkt_dev
->udp_src_max
) {
2389 if (pkt_dev
->flags
& F_UDPSRC_RND
)
2390 pkt_dev
->cur_udp_src
= random32() %
2391 (pkt_dev
->udp_src_max
- pkt_dev
->udp_src_min
)
2392 + pkt_dev
->udp_src_min
;
2395 pkt_dev
->cur_udp_src
++;
2396 if (pkt_dev
->cur_udp_src
>= pkt_dev
->udp_src_max
)
2397 pkt_dev
->cur_udp_src
= pkt_dev
->udp_src_min
;
2401 if (pkt_dev
->udp_dst_min
< pkt_dev
->udp_dst_max
) {
2402 if (pkt_dev
->flags
& F_UDPDST_RND
) {
2403 pkt_dev
->cur_udp_dst
= random32() %
2404 (pkt_dev
->udp_dst_max
- pkt_dev
->udp_dst_min
)
2405 + pkt_dev
->udp_dst_min
;
2407 pkt_dev
->cur_udp_dst
++;
2408 if (pkt_dev
->cur_udp_dst
>= pkt_dev
->udp_dst_max
)
2409 pkt_dev
->cur_udp_dst
= pkt_dev
->udp_dst_min
;
2413 if (!(pkt_dev
->flags
& F_IPV6
)) {
2415 imn
= ntohl(pkt_dev
->saddr_min
);
2416 imx
= ntohl(pkt_dev
->saddr_max
);
2419 if (pkt_dev
->flags
& F_IPSRC_RND
)
2420 t
= random32() % (imx
- imn
) + imn
;
2422 t
= ntohl(pkt_dev
->cur_saddr
);
2428 pkt_dev
->cur_saddr
= htonl(t
);
2431 if (pkt_dev
->cflows
&& f_seen(pkt_dev
, flow
)) {
2432 pkt_dev
->cur_daddr
= pkt_dev
->flows
[flow
].cur_daddr
;
2434 imn
= ntohl(pkt_dev
->daddr_min
);
2435 imx
= ntohl(pkt_dev
->daddr_max
);
2439 if (pkt_dev
->flags
& F_IPDST_RND
) {
2441 t
= random32() % (imx
- imn
) + imn
;
2444 while (ipv4_is_loopback(s
) ||
2445 ipv4_is_multicast(s
) ||
2446 ipv4_is_lbcast(s
) ||
2447 ipv4_is_zeronet(s
) ||
2448 ipv4_is_local_multicast(s
)) {
2449 t
= random32() % (imx
- imn
) + imn
;
2452 pkt_dev
->cur_daddr
= s
;
2454 t
= ntohl(pkt_dev
->cur_daddr
);
2459 pkt_dev
->cur_daddr
= htonl(t
);
2462 if (pkt_dev
->cflows
) {
2463 pkt_dev
->flows
[flow
].flags
|= F_INIT
;
2464 pkt_dev
->flows
[flow
].cur_daddr
=
2467 if (pkt_dev
->flags
& F_IPSEC_ON
)
2468 get_ipsec_sa(pkt_dev
, flow
);
2473 } else { /* IPV6 * */
2475 if (pkt_dev
->min_in6_daddr
.s6_addr32
[0] == 0 &&
2476 pkt_dev
->min_in6_daddr
.s6_addr32
[1] == 0 &&
2477 pkt_dev
->min_in6_daddr
.s6_addr32
[2] == 0 &&
2478 pkt_dev
->min_in6_daddr
.s6_addr32
[3] == 0) ;
2482 /* Only random destinations yet */
2484 for (i
= 0; i
< 4; i
++) {
2485 pkt_dev
->cur_in6_daddr
.s6_addr32
[i
] =
2486 (((__force __be32
)random32() |
2487 pkt_dev
->min_in6_daddr
.s6_addr32
[i
]) &
2488 pkt_dev
->max_in6_daddr
.s6_addr32
[i
]);
2493 if (pkt_dev
->min_pkt_size
< pkt_dev
->max_pkt_size
) {
2495 if (pkt_dev
->flags
& F_TXSIZE_RND
) {
2497 (pkt_dev
->max_pkt_size
- pkt_dev
->min_pkt_size
)
2498 + pkt_dev
->min_pkt_size
;
2500 t
= pkt_dev
->cur_pkt_size
+ 1;
2501 if (t
> pkt_dev
->max_pkt_size
)
2502 t
= pkt_dev
->min_pkt_size
;
2504 pkt_dev
->cur_pkt_size
= t
;
2507 set_cur_queue_map(pkt_dev
);
2509 pkt_dev
->flows
[flow
].count
++;
2514 static int pktgen_output_ipsec(struct sk_buff
*skb
, struct pktgen_dev
*pkt_dev
)
2516 struct xfrm_state
*x
= pkt_dev
->flows
[pkt_dev
->curfl
].x
;
2522 /* XXX: we dont support tunnel mode for now until
2523 * we resolve the dst issue */
2524 if (x
->props
.mode
!= XFRM_MODE_TRANSPORT
)
2527 spin_lock(&x
->lock
);
2530 err
= x
->outer_mode
->output(x
, skb
);
2533 err
= x
->type
->output(x
, skb
);
2537 x
->curlft
.bytes
+= skb
->len
;
2538 x
->curlft
.packets
++;
2540 spin_unlock(&x
->lock
);
2544 static void free_SAs(struct pktgen_dev
*pkt_dev
)
2546 if (pkt_dev
->cflows
) {
2547 /* let go of the SAs if we have them */
2549 for (i
= 0; i
< pkt_dev
->cflows
; i
++) {
2550 struct xfrm_state
*x
= pkt_dev
->flows
[i
].x
;
2553 pkt_dev
->flows
[i
].x
= NULL
;
2559 static int process_ipsec(struct pktgen_dev
*pkt_dev
,
2560 struct sk_buff
*skb
, __be16 protocol
)
2562 if (pkt_dev
->flags
& F_IPSEC_ON
) {
2563 struct xfrm_state
*x
= pkt_dev
->flows
[pkt_dev
->curfl
].x
;
2568 nhead
= x
->props
.header_len
- skb_headroom(skb
);
2570 ret
= pskb_expand_head(skb
, nhead
, 0, GFP_ATOMIC
);
2572 pr_err("Error expanding ipsec packet %d\n",
2578 /* ipsec is not expecting ll header */
2579 skb_pull(skb
, ETH_HLEN
);
2580 ret
= pktgen_output_ipsec(skb
, pkt_dev
);
2582 pr_err("Error creating ipsec packet %d\n", ret
);
2586 eth
= (__u8
*) skb_push(skb
, ETH_HLEN
);
2587 memcpy(eth
, pkt_dev
->hh
, 12);
2588 *(u16
*) ð
[12] = protocol
;
2598 static void mpls_push(__be32
*mpls
, struct pktgen_dev
*pkt_dev
)
2601 for (i
= 0; i
< pkt_dev
->nr_labels
; i
++)
2602 *mpls
++ = pkt_dev
->labels
[i
] & ~MPLS_STACK_BOTTOM
;
2605 *mpls
|= MPLS_STACK_BOTTOM
;
2608 static inline __be16
build_tci(unsigned int id
, unsigned int cfi
,
2611 return htons(id
| (cfi
<< 12) | (prio
<< 13));
2614 static void pktgen_finalize_skb(struct pktgen_dev
*pkt_dev
, struct sk_buff
*skb
,
2617 struct timeval timestamp
;
2618 struct pktgen_hdr
*pgh
;
2620 pgh
= (struct pktgen_hdr
*)skb_put(skb
, sizeof(*pgh
));
2621 datalen
-= sizeof(*pgh
);
2623 if (pkt_dev
->nfrags
<= 0) {
2624 memset(skb_put(skb
, datalen
), 0, datalen
);
2626 int frags
= pkt_dev
->nfrags
;
2630 if (frags
> MAX_SKB_FRAGS
)
2631 frags
= MAX_SKB_FRAGS
;
2632 len
= datalen
- frags
* PAGE_SIZE
;
2634 memset(skb_put(skb
, len
), 0, len
);
2635 datalen
= frags
* PAGE_SIZE
;
2639 while (datalen
> 0) {
2640 if (unlikely(!pkt_dev
->page
)) {
2641 int node
= numa_node_id();
2643 if (pkt_dev
->node
>= 0 && (pkt_dev
->flags
& F_NODE
))
2644 node
= pkt_dev
->node
;
2645 pkt_dev
->page
= alloc_pages_node(node
, GFP_KERNEL
| __GFP_ZERO
, 0);
2649 skb_shinfo(skb
)->frags
[i
].page
= pkt_dev
->page
;
2650 get_page(pkt_dev
->page
);
2651 skb_shinfo(skb
)->frags
[i
].page_offset
= 0;
2652 skb_shinfo(skb
)->frags
[i
].size
=
2653 (datalen
< PAGE_SIZE
? datalen
: PAGE_SIZE
);
2654 datalen
-= skb_shinfo(skb
)->frags
[i
].size
;
2655 skb
->len
+= skb_shinfo(skb
)->frags
[i
].size
;
2656 skb
->data_len
+= skb_shinfo(skb
)->frags
[i
].size
;
2658 skb_shinfo(skb
)->nr_frags
= i
;
2667 rem
= skb_shinfo(skb
)->frags
[i
- 1].size
/ 2;
2671 skb_shinfo(skb
)->frags
[i
- 1].size
-= rem
;
2673 skb_shinfo(skb
)->frags
[i
] =
2674 skb_shinfo(skb
)->frags
[i
- 1];
2675 get_page(skb_shinfo(skb
)->frags
[i
].page
);
2676 skb_shinfo(skb
)->frags
[i
].page
=
2677 skb_shinfo(skb
)->frags
[i
- 1].page
;
2678 skb_shinfo(skb
)->frags
[i
].page_offset
+=
2679 skb_shinfo(skb
)->frags
[i
- 1].size
;
2680 skb_shinfo(skb
)->frags
[i
].size
= rem
;
2682 skb_shinfo(skb
)->nr_frags
= i
;
2686 /* Stamp the time, and sequence number,
2687 * convert them to network byte order
2689 pgh
->pgh_magic
= htonl(PKTGEN_MAGIC
);
2690 pgh
->seq_num
= htonl(pkt_dev
->seq_num
);
2692 do_gettimeofday(×tamp
);
2693 pgh
->tv_sec
= htonl(timestamp
.tv_sec
);
2694 pgh
->tv_usec
= htonl(timestamp
.tv_usec
);
2697 static struct sk_buff
*fill_packet_ipv4(struct net_device
*odev
,
2698 struct pktgen_dev
*pkt_dev
)
2700 struct sk_buff
*skb
= NULL
;
2702 struct udphdr
*udph
;
2705 __be16 protocol
= htons(ETH_P_IP
);
2707 __be16
*vlan_tci
= NULL
; /* Encapsulates priority and VLAN ID */
2708 __be16
*vlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for VLAN tag */
2709 __be16
*svlan_tci
= NULL
; /* Encapsulates priority and SVLAN ID */
2710 __be16
*svlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for SVLAN tag */
2713 if (pkt_dev
->nr_labels
)
2714 protocol
= htons(ETH_P_MPLS_UC
);
2716 if (pkt_dev
->vlan_id
!= 0xffff)
2717 protocol
= htons(ETH_P_8021Q
);
2719 /* Update any of the values, used when we're incrementing various
2722 mod_cur_headers(pkt_dev
);
2723 queue_map
= pkt_dev
->cur_queue_map
;
2725 datalen
= (odev
->hard_header_len
+ 16) & ~0xf;
2727 if (pkt_dev
->flags
& F_NODE
) {
2730 if (pkt_dev
->node
>= 0)
2731 node
= pkt_dev
->node
;
2733 node
= numa_node_id();
2735 skb
= __alloc_skb(NET_SKB_PAD
+ pkt_dev
->cur_pkt_size
+ 64
2736 + datalen
+ pkt_dev
->pkt_overhead
, GFP_NOWAIT
, 0, node
);
2738 skb_reserve(skb
, NET_SKB_PAD
);
2743 skb
= __netdev_alloc_skb(odev
,
2744 pkt_dev
->cur_pkt_size
+ 64
2745 + datalen
+ pkt_dev
->pkt_overhead
, GFP_NOWAIT
);
2748 sprintf(pkt_dev
->result
, "No memory");
2751 prefetchw(skb
->data
);
2753 skb_reserve(skb
, datalen
);
2755 /* Reserve for ethernet and IP header */
2756 eth
= (__u8
*) skb_push(skb
, 14);
2757 mpls
= (__be32
*)skb_put(skb
, pkt_dev
->nr_labels
*sizeof(__u32
));
2758 if (pkt_dev
->nr_labels
)
2759 mpls_push(mpls
, pkt_dev
);
2761 if (pkt_dev
->vlan_id
!= 0xffff) {
2762 if (pkt_dev
->svlan_id
!= 0xffff) {
2763 svlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2764 *svlan_tci
= build_tci(pkt_dev
->svlan_id
,
2767 svlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2768 *svlan_encapsulated_proto
= htons(ETH_P_8021Q
);
2770 vlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2771 *vlan_tci
= build_tci(pkt_dev
->vlan_id
,
2774 vlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2775 *vlan_encapsulated_proto
= htons(ETH_P_IP
);
2778 skb
->network_header
= skb
->tail
;
2779 skb
->transport_header
= skb
->network_header
+ sizeof(struct iphdr
);
2780 skb_put(skb
, sizeof(struct iphdr
) + sizeof(struct udphdr
));
2781 skb_set_queue_mapping(skb
, queue_map
);
2782 skb
->priority
= pkt_dev
->skb_priority
;
2785 udph
= udp_hdr(skb
);
2787 memcpy(eth
, pkt_dev
->hh
, 12);
2788 *(__be16
*) & eth
[12] = protocol
;
2790 /* Eth + IPh + UDPh + mpls */
2791 datalen
= pkt_dev
->cur_pkt_size
- 14 - 20 - 8 -
2792 pkt_dev
->pkt_overhead
;
2793 if (datalen
< sizeof(struct pktgen_hdr
))
2794 datalen
= sizeof(struct pktgen_hdr
);
2796 udph
->source
= htons(pkt_dev
->cur_udp_src
);
2797 udph
->dest
= htons(pkt_dev
->cur_udp_dst
);
2798 udph
->len
= htons(datalen
+ 8); /* DATA + udphdr */
2799 udph
->check
= 0; /* No checksum */
2804 iph
->tos
= pkt_dev
->tos
;
2805 iph
->protocol
= IPPROTO_UDP
; /* UDP */
2806 iph
->saddr
= pkt_dev
->cur_saddr
;
2807 iph
->daddr
= pkt_dev
->cur_daddr
;
2808 iph
->id
= htons(pkt_dev
->ip_id
);
2811 iplen
= 20 + 8 + datalen
;
2812 iph
->tot_len
= htons(iplen
);
2814 iph
->check
= ip_fast_csum((void *)iph
, iph
->ihl
);
2815 skb
->protocol
= protocol
;
2816 skb
->mac_header
= (skb
->network_header
- ETH_HLEN
-
2817 pkt_dev
->pkt_overhead
);
2819 skb
->pkt_type
= PACKET_HOST
;
2820 pktgen_finalize_skb(pkt_dev
, skb
, datalen
);
2823 if (!process_ipsec(pkt_dev
, skb
, protocol
))
2831 * scan_ip6, fmt_ip taken from dietlibc-0.21
2832 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2834 * Slightly modified for kernel.
2835 * Should be candidate for net/ipv4/utils.c
2839 static unsigned int scan_ip6(const char *s
, char ip
[16])
2842 unsigned int len
= 0;
2845 unsigned int prefixlen
= 0;
2846 unsigned int suffixlen
= 0;
2850 for (i
= 0; i
< 16; i
++)
2856 if (s
[1] == ':') { /* Found "::", skip to part 2 */
2864 u
= simple_strtoul(s
, &pos
, 16);
2868 if (prefixlen
== 12 && s
[i
] == '.') {
2870 /* the last 4 bytes may be written as IPv4 address */
2873 memcpy((struct in_addr
*)(ip
+ 12), &tmp
, sizeof(tmp
));
2876 ip
[prefixlen
++] = (u
>> 8);
2877 ip
[prefixlen
++] = (u
& 255);
2880 if (prefixlen
== 16)
2884 /* part 2, after "::" */
2891 } else if (suffixlen
!= 0)
2894 u
= simple_strtol(s
, &pos
, 16);
2901 if (suffixlen
+ prefixlen
<= 12 && s
[i
] == '.') {
2903 memcpy((struct in_addr
*)(suffix
+ suffixlen
), &tmp
,
2909 suffix
[suffixlen
++] = (u
>> 8);
2910 suffix
[suffixlen
++] = (u
& 255);
2913 if (prefixlen
+ suffixlen
== 16)
2916 for (i
= 0; i
< suffixlen
; i
++)
2917 ip
[16 - suffixlen
+ i
] = suffix
[i
];
2921 static char tohex(char hexdigit
)
2923 return hexdigit
> 9 ? hexdigit
+ 'a' - 10 : hexdigit
+ '0';
2926 static int fmt_xlong(char *s
, unsigned int i
)
2929 *s
= tohex((i
>> 12) & 0xf);
2930 if (s
!= bak
|| *s
!= '0')
2932 *s
= tohex((i
>> 8) & 0xf);
2933 if (s
!= bak
|| *s
!= '0')
2935 *s
= tohex((i
>> 4) & 0xf);
2936 if (s
!= bak
|| *s
!= '0')
2938 *s
= tohex(i
& 0xf);
2942 static unsigned int fmt_ip6(char *s
, const char ip
[16])
2947 unsigned int compressing
;
2952 for (j
= 0; j
< 16; j
+= 2) {
2954 #ifdef V4MAPPEDPREFIX
2955 if (j
== 12 && !memcmp(ip
, V4mappedprefix
, 12)) {
2956 inet_ntoa_r(*(struct in_addr
*)(ip
+ 12), s
);
2961 temp
= ((unsigned long)(unsigned char)ip
[j
] << 8) +
2962 (unsigned long)(unsigned char)ip
[j
+ 1];
2977 i
= fmt_xlong(s
, temp
);
2994 static struct sk_buff
*fill_packet_ipv6(struct net_device
*odev
,
2995 struct pktgen_dev
*pkt_dev
)
2997 struct sk_buff
*skb
= NULL
;
2999 struct udphdr
*udph
;
3001 struct ipv6hdr
*iph
;
3002 __be16 protocol
= htons(ETH_P_IPV6
);
3004 __be16
*vlan_tci
= NULL
; /* Encapsulates priority and VLAN ID */
3005 __be16
*vlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for VLAN tag */
3006 __be16
*svlan_tci
= NULL
; /* Encapsulates priority and SVLAN ID */
3007 __be16
*svlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for SVLAN tag */
3010 if (pkt_dev
->nr_labels
)
3011 protocol
= htons(ETH_P_MPLS_UC
);
3013 if (pkt_dev
->vlan_id
!= 0xffff)
3014 protocol
= htons(ETH_P_8021Q
);
3016 /* Update any of the values, used when we're incrementing various
3019 mod_cur_headers(pkt_dev
);
3020 queue_map
= pkt_dev
->cur_queue_map
;
3022 skb
= __netdev_alloc_skb(odev
,
3023 pkt_dev
->cur_pkt_size
+ 64
3024 + 16 + pkt_dev
->pkt_overhead
, GFP_NOWAIT
);
3026 sprintf(pkt_dev
->result
, "No memory");
3029 prefetchw(skb
->data
);
3031 skb_reserve(skb
, 16);
3033 /* Reserve for ethernet and IP header */
3034 eth
= (__u8
*) skb_push(skb
, 14);
3035 mpls
= (__be32
*)skb_put(skb
, pkt_dev
->nr_labels
*sizeof(__u32
));
3036 if (pkt_dev
->nr_labels
)
3037 mpls_push(mpls
, pkt_dev
);
3039 if (pkt_dev
->vlan_id
!= 0xffff) {
3040 if (pkt_dev
->svlan_id
!= 0xffff) {
3041 svlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
3042 *svlan_tci
= build_tci(pkt_dev
->svlan_id
,
3045 svlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
3046 *svlan_encapsulated_proto
= htons(ETH_P_8021Q
);
3048 vlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
3049 *vlan_tci
= build_tci(pkt_dev
->vlan_id
,
3052 vlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
3053 *vlan_encapsulated_proto
= htons(ETH_P_IPV6
);
3056 skb
->network_header
= skb
->tail
;
3057 skb
->transport_header
= skb
->network_header
+ sizeof(struct ipv6hdr
);
3058 skb_put(skb
, sizeof(struct ipv6hdr
) + sizeof(struct udphdr
));
3059 skb_set_queue_mapping(skb
, queue_map
);
3060 skb
->priority
= pkt_dev
->skb_priority
;
3061 iph
= ipv6_hdr(skb
);
3062 udph
= udp_hdr(skb
);
3064 memcpy(eth
, pkt_dev
->hh
, 12);
3065 *(__be16
*) ð
[12] = protocol
;
3067 /* Eth + IPh + UDPh + mpls */
3068 datalen
= pkt_dev
->cur_pkt_size
- 14 -
3069 sizeof(struct ipv6hdr
) - sizeof(struct udphdr
) -
3070 pkt_dev
->pkt_overhead
;
3072 if (datalen
< sizeof(struct pktgen_hdr
)) {
3073 datalen
= sizeof(struct pktgen_hdr
);
3074 if (net_ratelimit())
3075 pr_info("increased datalen to %d\n", datalen
);
3078 udph
->source
= htons(pkt_dev
->cur_udp_src
);
3079 udph
->dest
= htons(pkt_dev
->cur_udp_dst
);
3080 udph
->len
= htons(datalen
+ sizeof(struct udphdr
));
3081 udph
->check
= 0; /* No checksum */
3083 *(__be32
*) iph
= htonl(0x60000000); /* Version + flow */
3085 if (pkt_dev
->traffic_class
) {
3086 /* Version + traffic class + flow (0) */
3087 *(__be32
*)iph
|= htonl(0x60000000 | (pkt_dev
->traffic_class
<< 20));
3090 iph
->hop_limit
= 32;
3092 iph
->payload_len
= htons(sizeof(struct udphdr
) + datalen
);
3093 iph
->nexthdr
= IPPROTO_UDP
;
3095 ipv6_addr_copy(&iph
->daddr
, &pkt_dev
->cur_in6_daddr
);
3096 ipv6_addr_copy(&iph
->saddr
, &pkt_dev
->cur_in6_saddr
);
3098 skb
->mac_header
= (skb
->network_header
- ETH_HLEN
-
3099 pkt_dev
->pkt_overhead
);
3100 skb
->protocol
= protocol
;
3102 skb
->pkt_type
= PACKET_HOST
;
3104 pktgen_finalize_skb(pkt_dev
, skb
, datalen
);
3109 static struct sk_buff
*fill_packet(struct net_device
*odev
,
3110 struct pktgen_dev
*pkt_dev
)
3112 if (pkt_dev
->flags
& F_IPV6
)
3113 return fill_packet_ipv6(odev
, pkt_dev
);
3115 return fill_packet_ipv4(odev
, pkt_dev
);
3118 static void pktgen_clear_counters(struct pktgen_dev
*pkt_dev
)
3120 pkt_dev
->seq_num
= 1;
3121 pkt_dev
->idle_acc
= 0;
3123 pkt_dev
->tx_bytes
= 0;
3124 pkt_dev
->errors
= 0;
3127 /* Set up structure for sending pkts, clear counters */
3129 static void pktgen_run(struct pktgen_thread
*t
)
3131 struct pktgen_dev
*pkt_dev
;
3137 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
3140 * setup odev and create initial packet.
3142 pktgen_setup_inject(pkt_dev
);
3144 if (pkt_dev
->odev
) {
3145 pktgen_clear_counters(pkt_dev
);
3146 pkt_dev
->running
= 1; /* Cranke yeself! */
3147 pkt_dev
->skb
= NULL
;
3148 pkt_dev
->started_at
=
3149 pkt_dev
->next_tx
= ktime_now();
3151 set_pkt_overhead(pkt_dev
);
3153 strcpy(pkt_dev
->result
, "Starting");
3156 strcpy(pkt_dev
->result
, "Error starting");
3160 t
->control
&= ~(T_STOP
);
3163 static void pktgen_stop_all_threads_ifs(void)
3165 struct pktgen_thread
*t
;
3169 mutex_lock(&pktgen_thread_lock
);
3171 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3172 t
->control
|= T_STOP
;
3174 mutex_unlock(&pktgen_thread_lock
);
3177 static int thread_is_running(const struct pktgen_thread
*t
)
3179 const struct pktgen_dev
*pkt_dev
;
3181 list_for_each_entry(pkt_dev
, &t
->if_list
, list
)
3182 if (pkt_dev
->running
)
3187 static int pktgen_wait_thread_run(struct pktgen_thread
*t
)
3191 while (thread_is_running(t
)) {
3195 msleep_interruptible(100);
3197 if (signal_pending(current
))
3207 static int pktgen_wait_all_threads_run(void)
3209 struct pktgen_thread
*t
;
3212 mutex_lock(&pktgen_thread_lock
);
3214 list_for_each_entry(t
, &pktgen_threads
, th_list
) {
3215 sig
= pktgen_wait_thread_run(t
);
3221 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3222 t
->control
|= (T_STOP
);
3224 mutex_unlock(&pktgen_thread_lock
);
3228 static void pktgen_run_all_threads(void)
3230 struct pktgen_thread
*t
;
3234 mutex_lock(&pktgen_thread_lock
);
3236 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3237 t
->control
|= (T_RUN
);
3239 mutex_unlock(&pktgen_thread_lock
);
3241 /* Propagate thread->control */
3242 schedule_timeout_interruptible(msecs_to_jiffies(125));
3244 pktgen_wait_all_threads_run();
3247 static void pktgen_reset_all_threads(void)
3249 struct pktgen_thread
*t
;
3253 mutex_lock(&pktgen_thread_lock
);
3255 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3256 t
->control
|= (T_REMDEVALL
);
3258 mutex_unlock(&pktgen_thread_lock
);
3260 /* Propagate thread->control */
3261 schedule_timeout_interruptible(msecs_to_jiffies(125));
3263 pktgen_wait_all_threads_run();
3266 static void show_results(struct pktgen_dev
*pkt_dev
, int nr_frags
)
3268 __u64 bps
, mbps
, pps
;
3269 char *p
= pkt_dev
->result
;
3270 ktime_t elapsed
= ktime_sub(pkt_dev
->stopped_at
,
3271 pkt_dev
->started_at
);
3272 ktime_t idle
= ns_to_ktime(pkt_dev
->idle_acc
);
3274 p
+= sprintf(p
, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3275 (unsigned long long)ktime_to_us(elapsed
),
3276 (unsigned long long)ktime_to_us(ktime_sub(elapsed
, idle
)),
3277 (unsigned long long)ktime_to_us(idle
),
3278 (unsigned long long)pkt_dev
->sofar
,
3279 pkt_dev
->cur_pkt_size
, nr_frags
);
3281 pps
= div64_u64(pkt_dev
->sofar
* NSEC_PER_SEC
,
3282 ktime_to_ns(elapsed
));
3284 bps
= pps
* 8 * pkt_dev
->cur_pkt_size
;
3287 do_div(mbps
, 1000000);
3288 p
+= sprintf(p
, " %llupps %lluMb/sec (%llubps) errors: %llu",
3289 (unsigned long long)pps
,
3290 (unsigned long long)mbps
,
3291 (unsigned long long)bps
,
3292 (unsigned long long)pkt_dev
->errors
);
3295 /* Set stopped-at timer, remove from running list, do counters & statistics */
3296 static int pktgen_stop_device(struct pktgen_dev
*pkt_dev
)
3298 int nr_frags
= pkt_dev
->skb
? skb_shinfo(pkt_dev
->skb
)->nr_frags
: -1;
3300 if (!pkt_dev
->running
) {
3301 pr_warning("interface: %s is already stopped\n",
3306 kfree_skb(pkt_dev
->skb
);
3307 pkt_dev
->skb
= NULL
;
3308 pkt_dev
->stopped_at
= ktime_now();
3309 pkt_dev
->running
= 0;
3311 show_results(pkt_dev
, nr_frags
);
3316 static struct pktgen_dev
*next_to_run(struct pktgen_thread
*t
)
3318 struct pktgen_dev
*pkt_dev
, *best
= NULL
;
3322 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
3323 if (!pkt_dev
->running
)
3327 else if (ktime_lt(pkt_dev
->next_tx
, best
->next_tx
))
3334 static void pktgen_stop(struct pktgen_thread
*t
)
3336 struct pktgen_dev
*pkt_dev
;
3342 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
3343 pktgen_stop_device(pkt_dev
);
3350 * one of our devices needs to be removed - find it
3353 static void pktgen_rem_one_if(struct pktgen_thread
*t
)
3355 struct list_head
*q
, *n
;
3356 struct pktgen_dev
*cur
;
3362 list_for_each_safe(q
, n
, &t
->if_list
) {
3363 cur
= list_entry(q
, struct pktgen_dev
, list
);
3365 if (!cur
->removal_mark
)
3368 kfree_skb(cur
->skb
);
3371 pktgen_remove_device(t
, cur
);
3379 static void pktgen_rem_all_ifs(struct pktgen_thread
*t
)
3381 struct list_head
*q
, *n
;
3382 struct pktgen_dev
*cur
;
3386 /* Remove all devices, free mem */
3390 list_for_each_safe(q
, n
, &t
->if_list
) {
3391 cur
= list_entry(q
, struct pktgen_dev
, list
);
3393 kfree_skb(cur
->skb
);
3396 pktgen_remove_device(t
, cur
);
3402 static void pktgen_rem_thread(struct pktgen_thread
*t
)
3404 /* Remove from the thread list */
3406 remove_proc_entry(t
->tsk
->comm
, pg_proc_dir
);
3410 static void pktgen_resched(struct pktgen_dev
*pkt_dev
)
3412 ktime_t idle_start
= ktime_now();
3414 pkt_dev
->idle_acc
+= ktime_to_ns(ktime_sub(ktime_now(), idle_start
));
3417 static void pktgen_wait_for_skb(struct pktgen_dev
*pkt_dev
)
3419 ktime_t idle_start
= ktime_now();
3421 while (atomic_read(&(pkt_dev
->skb
->users
)) != 1) {
3422 if (signal_pending(current
))
3426 pktgen_resched(pkt_dev
);
3430 pkt_dev
->idle_acc
+= ktime_to_ns(ktime_sub(ktime_now(), idle_start
));
3433 static void pktgen_xmit(struct pktgen_dev
*pkt_dev
)
3435 struct net_device
*odev
= pkt_dev
->odev
;
3436 netdev_tx_t (*xmit
)(struct sk_buff
*, struct net_device
*)
3437 = odev
->netdev_ops
->ndo_start_xmit
;
3438 struct netdev_queue
*txq
;
3442 /* If device is offline, then don't send */
3443 if (unlikely(!netif_running(odev
) || !netif_carrier_ok(odev
))) {
3444 pktgen_stop_device(pkt_dev
);
3448 /* This is max DELAY, this has special meaning of
3451 if (unlikely(pkt_dev
->delay
== ULLONG_MAX
)) {
3452 pkt_dev
->next_tx
= ktime_add_ns(ktime_now(), ULONG_MAX
);
3456 /* If no skb or clone count exhausted then get new one */
3457 if (!pkt_dev
->skb
|| (pkt_dev
->last_ok
&&
3458 ++pkt_dev
->clone_count
>= pkt_dev
->clone_skb
)) {
3459 /* build a new pkt */
3460 kfree_skb(pkt_dev
->skb
);
3462 pkt_dev
->skb
= fill_packet(odev
, pkt_dev
);
3463 if (pkt_dev
->skb
== NULL
) {
3464 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3466 pkt_dev
->clone_count
--; /* back out increment, OOM */
3469 pkt_dev
->last_pkt_size
= pkt_dev
->skb
->len
;
3470 pkt_dev
->allocated_skbs
++;
3471 pkt_dev
->clone_count
= 0; /* reset counter */
3474 if (pkt_dev
->delay
&& pkt_dev
->last_ok
)
3475 spin(pkt_dev
, pkt_dev
->next_tx
);
3477 queue_map
= skb_get_queue_mapping(pkt_dev
->skb
);
3478 txq
= netdev_get_tx_queue(odev
, queue_map
);
3480 __netif_tx_lock_bh(txq
);
3482 if (unlikely(netif_tx_queue_frozen_or_stopped(txq
))) {
3483 ret
= NETDEV_TX_BUSY
;
3484 pkt_dev
->last_ok
= 0;
3487 atomic_inc(&(pkt_dev
->skb
->users
));
3488 ret
= (*xmit
)(pkt_dev
->skb
, odev
);
3492 txq_trans_update(txq
);
3493 pkt_dev
->last_ok
= 1;
3496 pkt_dev
->tx_bytes
+= pkt_dev
->last_pkt_size
;
3500 case NET_XMIT_POLICED
:
3501 /* skb has been consumed */
3504 default: /* Drivers are not supposed to return other values! */
3505 if (net_ratelimit())
3506 pr_info("%s xmit error: %d\n", pkt_dev
->odevname
, ret
);
3509 case NETDEV_TX_LOCKED
:
3510 case NETDEV_TX_BUSY
:
3511 /* Retry it next time */
3512 atomic_dec(&(pkt_dev
->skb
->users
));
3513 pkt_dev
->last_ok
= 0;
3516 __netif_tx_unlock_bh(txq
);
3518 /* If pkt_dev->count is zero, then run forever */
3519 if ((pkt_dev
->count
!= 0) && (pkt_dev
->sofar
>= pkt_dev
->count
)) {
3520 pktgen_wait_for_skb(pkt_dev
);
3522 /* Done with this */
3523 pktgen_stop_device(pkt_dev
);
3528 * Main loop of the thread goes here
3531 static int pktgen_thread_worker(void *arg
)
3534 struct pktgen_thread
*t
= arg
;
3535 struct pktgen_dev
*pkt_dev
= NULL
;
3538 BUG_ON(smp_processor_id() != cpu
);
3540 init_waitqueue_head(&t
->queue
);
3541 complete(&t
->start_done
);
3543 pr_debug("starting pktgen/%d: pid=%d\n", cpu
, task_pid_nr(current
));
3545 set_current_state(TASK_INTERRUPTIBLE
);
3549 while (!kthread_should_stop()) {
3550 pkt_dev
= next_to_run(t
);
3552 if (unlikely(!pkt_dev
&& t
->control
== 0)) {
3555 wait_event_interruptible_timeout(t
->queue
,
3562 __set_current_state(TASK_RUNNING
);
3564 if (likely(pkt_dev
)) {
3565 pktgen_xmit(pkt_dev
);
3568 pktgen_resched(pkt_dev
);
3573 if (t
->control
& T_STOP
) {
3575 t
->control
&= ~(T_STOP
);
3578 if (t
->control
& T_RUN
) {
3580 t
->control
&= ~(T_RUN
);
3583 if (t
->control
& T_REMDEVALL
) {
3584 pktgen_rem_all_ifs(t
);
3585 t
->control
&= ~(T_REMDEVALL
);
3588 if (t
->control
& T_REMDEV
) {
3589 pktgen_rem_one_if(t
);
3590 t
->control
&= ~(T_REMDEV
);
3595 set_current_state(TASK_INTERRUPTIBLE
);
3598 pr_debug("%s stopping all device\n", t
->tsk
->comm
);
3601 pr_debug("%s removing all device\n", t
->tsk
->comm
);
3602 pktgen_rem_all_ifs(t
);
3604 pr_debug("%s removing thread\n", t
->tsk
->comm
);
3605 pktgen_rem_thread(t
);
3607 /* Wait for kthread_stop */
3608 while (!kthread_should_stop()) {
3609 set_current_state(TASK_INTERRUPTIBLE
);
3612 __set_current_state(TASK_RUNNING
);
3617 static struct pktgen_dev
*pktgen_find_dev(struct pktgen_thread
*t
,
3618 const char *ifname
, bool exact
)
3620 struct pktgen_dev
*p
, *pkt_dev
= NULL
;
3621 size_t len
= strlen(ifname
);
3624 list_for_each_entry(p
, &t
->if_list
, list
)
3625 if (strncmp(p
->odevname
, ifname
, len
) == 0) {
3626 if (p
->odevname
[len
]) {
3627 if (exact
|| p
->odevname
[len
] != '@')
3635 pr_debug("find_dev(%s) returning %p\n", ifname
, pkt_dev
);
3640 * Adds a dev at front of if_list.
3643 static int add_dev_to_thread(struct pktgen_thread
*t
,
3644 struct pktgen_dev
*pkt_dev
)
3650 if (pkt_dev
->pg_thread
) {
3651 pr_err("ERROR: already assigned to a thread\n");
3656 list_add(&pkt_dev
->list
, &t
->if_list
);
3657 pkt_dev
->pg_thread
= t
;
3658 pkt_dev
->running
= 0;
3665 /* Called under thread lock */
3667 static int pktgen_add_device(struct pktgen_thread
*t
, const char *ifname
)
3669 struct pktgen_dev
*pkt_dev
;
3671 int node
= cpu_to_node(t
->cpu
);
3673 /* We don't allow a device to be on several threads */
3675 pkt_dev
= __pktgen_NN_threads(ifname
, FIND
);
3677 pr_err("ERROR: interface already used\n");
3681 pkt_dev
= kzalloc_node(sizeof(struct pktgen_dev
), GFP_KERNEL
, node
);
3685 strcpy(pkt_dev
->odevname
, ifname
);
3686 pkt_dev
->flows
= vmalloc_node(MAX_CFLOWS
* sizeof(struct flow_state
),
3688 if (pkt_dev
->flows
== NULL
) {
3692 memset(pkt_dev
->flows
, 0, MAX_CFLOWS
* sizeof(struct flow_state
));
3694 pkt_dev
->removal_mark
= 0;
3695 pkt_dev
->min_pkt_size
= ETH_ZLEN
;
3696 pkt_dev
->max_pkt_size
= ETH_ZLEN
;
3697 pkt_dev
->nfrags
= 0;
3698 pkt_dev
->clone_skb
= pg_clone_skb_d
;
3699 pkt_dev
->delay
= pg_delay_d
;
3700 pkt_dev
->count
= pg_count_d
;
3702 pkt_dev
->udp_src_min
= 9; /* sink port */
3703 pkt_dev
->udp_src_max
= 9;
3704 pkt_dev
->udp_dst_min
= 9;
3705 pkt_dev
->udp_dst_max
= 9;
3707 pkt_dev
->vlan_p
= 0;
3708 pkt_dev
->vlan_cfi
= 0;
3709 pkt_dev
->vlan_id
= 0xffff;
3710 pkt_dev
->svlan_p
= 0;
3711 pkt_dev
->svlan_cfi
= 0;
3712 pkt_dev
->svlan_id
= 0xffff;
3715 err
= pktgen_setup_dev(pkt_dev
, ifname
);
3719 pkt_dev
->entry
= proc_create_data(ifname
, 0600, pg_proc_dir
,
3720 &pktgen_if_fops
, pkt_dev
);
3721 if (!pkt_dev
->entry
) {
3722 pr_err("cannot create %s/%s procfs entry\n",
3723 PG_PROC_DIR
, ifname
);
3728 pkt_dev
->ipsmode
= XFRM_MODE_TRANSPORT
;
3729 pkt_dev
->ipsproto
= IPPROTO_ESP
;
3732 return add_dev_to_thread(t
, pkt_dev
);
3734 dev_put(pkt_dev
->odev
);
3739 vfree(pkt_dev
->flows
);
3744 static int __init
pktgen_create_thread(int cpu
)
3746 struct pktgen_thread
*t
;
3747 struct proc_dir_entry
*pe
;
3748 struct task_struct
*p
;
3750 t
= kzalloc_node(sizeof(struct pktgen_thread
), GFP_KERNEL
,
3753 pr_err("ERROR: out of memory, can't create new thread\n");
3757 spin_lock_init(&t
->if_lock
);
3760 INIT_LIST_HEAD(&t
->if_list
);
3762 list_add_tail(&t
->th_list
, &pktgen_threads
);
3763 init_completion(&t
->start_done
);
3765 p
= kthread_create_on_node(pktgen_thread_worker
,
3768 "kpktgend_%d", cpu
);
3770 pr_err("kernel_thread() failed for cpu %d\n", t
->cpu
);
3771 list_del(&t
->th_list
);
3775 kthread_bind(p
, cpu
);
3778 pe
= proc_create_data(t
->tsk
->comm
, 0600, pg_proc_dir
,
3779 &pktgen_thread_fops
, t
);
3781 pr_err("cannot create %s/%s procfs entry\n",
3782 PG_PROC_DIR
, t
->tsk
->comm
);
3784 list_del(&t
->th_list
);
3790 wait_for_completion(&t
->start_done
);
3796 * Removes a device from the thread if_list.
3798 static void _rem_dev_from_if_list(struct pktgen_thread
*t
,
3799 struct pktgen_dev
*pkt_dev
)
3801 struct list_head
*q
, *n
;
3802 struct pktgen_dev
*p
;
3804 list_for_each_safe(q
, n
, &t
->if_list
) {
3805 p
= list_entry(q
, struct pktgen_dev
, list
);
3811 static int pktgen_remove_device(struct pktgen_thread
*t
,
3812 struct pktgen_dev
*pkt_dev
)
3815 pr_debug("remove_device pkt_dev=%p\n", pkt_dev
);
3817 if (pkt_dev
->running
) {
3818 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3819 pktgen_stop_device(pkt_dev
);
3822 /* Dis-associate from the interface */
3824 if (pkt_dev
->odev
) {
3825 dev_put(pkt_dev
->odev
);
3826 pkt_dev
->odev
= NULL
;
3829 /* And update the thread if_list */
3831 _rem_dev_from_if_list(t
, pkt_dev
);
3834 remove_proc_entry(pkt_dev
->entry
->name
, pg_proc_dir
);
3839 vfree(pkt_dev
->flows
);
3841 put_page(pkt_dev
->page
);
3846 static int __init
pg_init(void)
3849 struct proc_dir_entry
*pe
;
3851 pr_info("%s", version
);
3853 pg_proc_dir
= proc_mkdir(PG_PROC_DIR
, init_net
.proc_net
);
3857 pe
= proc_create(PGCTRL
, 0600, pg_proc_dir
, &pktgen_fops
);
3859 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL
);
3860 proc_net_remove(&init_net
, PG_PROC_DIR
);
3864 /* Register us to receive netdevice events */
3865 register_netdevice_notifier(&pktgen_notifier_block
);
3867 for_each_online_cpu(cpu
) {
3870 err
= pktgen_create_thread(cpu
);
3872 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3876 if (list_empty(&pktgen_threads
)) {
3877 pr_err("ERROR: Initialization failed for all threads\n");
3878 unregister_netdevice_notifier(&pktgen_notifier_block
);
3879 remove_proc_entry(PGCTRL
, pg_proc_dir
);
3880 proc_net_remove(&init_net
, PG_PROC_DIR
);
3887 static void __exit
pg_cleanup(void)
3889 struct pktgen_thread
*t
;
3890 struct list_head
*q
, *n
;
3892 /* Stop all interfaces & threads */
3893 pktgen_exiting
= true;
3895 list_for_each_safe(q
, n
, &pktgen_threads
) {
3896 t
= list_entry(q
, struct pktgen_thread
, th_list
);
3897 kthread_stop(t
->tsk
);
3901 /* Un-register us from receiving netdevice events */
3902 unregister_netdevice_notifier(&pktgen_notifier_block
);
3904 /* Clean up proc file system */
3905 remove_proc_entry(PGCTRL
, pg_proc_dir
);
3906 proc_net_remove(&init_net
, PG_PROC_DIR
);
3909 module_init(pg_init
);
3910 module_exit(pg_cleanup
);
3912 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3913 MODULE_DESCRIPTION("Packet Generator tool");
3914 MODULE_LICENSE("GPL");
3915 MODULE_VERSION(VERSION
);
3916 module_param(pg_count_d
, int, 0);
3917 MODULE_PARM_DESC(pg_count_d
, "Default number of packets to inject");
3918 module_param(pg_delay_d
, int, 0);
3919 MODULE_PARM_DESC(pg_delay_d
, "Default delay between packets (nanoseconds)");
3920 module_param(pg_clone_skb_d
, int, 0);
3921 MODULE_PARM_DESC(pg_clone_skb_d
, "Default number of copies of the same packet");
3922 module_param(debug
, int, 0);
3923 MODULE_PARM_DESC(debug
, "Enable debugging of pktgen module");