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]);
454 /* Module parameters, defaults. */
455 static int pg_count_d __read_mostly
= 1000;
456 static int pg_delay_d __read_mostly
;
457 static int pg_clone_skb_d __read_mostly
;
458 static int debug __read_mostly
;
460 static DEFINE_MUTEX(pktgen_thread_lock
);
461 static LIST_HEAD(pktgen_threads
);
463 static struct notifier_block pktgen_notifier_block
= {
464 .notifier_call
= pktgen_device_event
,
468 * /proc handling functions
472 static int pgctrl_show(struct seq_file
*seq
, void *v
)
474 seq_puts(seq
, version
);
478 static ssize_t
pgctrl_write(struct file
*file
, const char __user
*buf
,
479 size_t count
, loff_t
*ppos
)
484 if (!capable(CAP_NET_ADMIN
)) {
489 if (count
> sizeof(data
))
490 count
= sizeof(data
);
492 if (copy_from_user(data
, buf
, count
)) {
496 data
[count
- 1] = 0; /* Make string */
498 if (!strcmp(data
, "stop"))
499 pktgen_stop_all_threads_ifs();
501 else if (!strcmp(data
, "start"))
502 pktgen_run_all_threads();
504 else if (!strcmp(data
, "reset"))
505 pktgen_reset_all_threads();
508 pr_warning("Unknown command: %s\n", data
);
516 static int pgctrl_open(struct inode
*inode
, struct file
*file
)
518 return single_open(file
, pgctrl_show
, PDE(inode
)->data
);
521 static const struct file_operations pktgen_fops
= {
522 .owner
= THIS_MODULE
,
526 .write
= pgctrl_write
,
527 .release
= single_release
,
530 static int pktgen_if_show(struct seq_file
*seq
, void *v
)
532 const struct pktgen_dev
*pkt_dev
= seq
->private;
537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
538 (unsigned long long)pkt_dev
->count
, pkt_dev
->min_pkt_size
,
539 pkt_dev
->max_pkt_size
);
542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
543 pkt_dev
->nfrags
, (unsigned long long) pkt_dev
->delay
,
544 pkt_dev
->clone_skb
, pkt_dev
->odevname
);
546 seq_printf(seq
, " flows: %u flowlen: %u\n", pkt_dev
->cflows
,
550 " queue_map_min: %u queue_map_max: %u\n",
551 pkt_dev
->queue_map_min
,
552 pkt_dev
->queue_map_max
);
554 if (pkt_dev
->skb_priority
)
555 seq_printf(seq
, " skb_priority: %u\n",
556 pkt_dev
->skb_priority
);
558 if (pkt_dev
->flags
& F_IPV6
) {
560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
563 &pkt_dev
->min_in6_saddr
, &pkt_dev
->max_in6_saddr
,
565 &pkt_dev
->min_in6_daddr
, &pkt_dev
->max_in6_daddr
);
568 " dst_min: %s dst_max: %s\n",
569 pkt_dev
->dst_min
, pkt_dev
->dst_max
);
571 " src_min: %s src_max: %s\n",
572 pkt_dev
->src_min
, pkt_dev
->src_max
);
575 seq_puts(seq
, " src_mac: ");
577 seq_printf(seq
, "%pM ",
578 is_zero_ether_addr(pkt_dev
->src_mac
) ?
579 pkt_dev
->odev
->dev_addr
: pkt_dev
->src_mac
);
581 seq_printf(seq
, "dst_mac: ");
582 seq_printf(seq
, "%pM\n", pkt_dev
->dst_mac
);
585 " udp_src_min: %d udp_src_max: %d"
586 " udp_dst_min: %d udp_dst_max: %d\n",
587 pkt_dev
->udp_src_min
, pkt_dev
->udp_src_max
,
588 pkt_dev
->udp_dst_min
, pkt_dev
->udp_dst_max
);
591 " src_mac_count: %d dst_mac_count: %d\n",
592 pkt_dev
->src_mac_count
, pkt_dev
->dst_mac_count
);
594 if (pkt_dev
->nr_labels
) {
596 seq_printf(seq
, " mpls: ");
597 for (i
= 0; i
< pkt_dev
->nr_labels
; i
++)
598 seq_printf(seq
, "%08x%s", ntohl(pkt_dev
->labels
[i
]),
599 i
== pkt_dev
->nr_labels
-1 ? "\n" : ", ");
602 if (pkt_dev
->vlan_id
!= 0xffff)
603 seq_printf(seq
, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev
->vlan_id
, pkt_dev
->vlan_p
,
607 if (pkt_dev
->svlan_id
!= 0xffff)
608 seq_printf(seq
, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
609 pkt_dev
->svlan_id
, pkt_dev
->svlan_p
,
613 seq_printf(seq
, " tos: 0x%02x\n", pkt_dev
->tos
);
615 if (pkt_dev
->traffic_class
)
616 seq_printf(seq
, " traffic_class: 0x%02x\n", pkt_dev
->traffic_class
);
618 if (pkt_dev
->node
>= 0)
619 seq_printf(seq
, " node: %d\n", pkt_dev
->node
);
621 seq_printf(seq
, " Flags: ");
623 if (pkt_dev
->flags
& F_IPV6
)
624 seq_printf(seq
, "IPV6 ");
626 if (pkt_dev
->flags
& F_IPSRC_RND
)
627 seq_printf(seq
, "IPSRC_RND ");
629 if (pkt_dev
->flags
& F_IPDST_RND
)
630 seq_printf(seq
, "IPDST_RND ");
632 if (pkt_dev
->flags
& F_TXSIZE_RND
)
633 seq_printf(seq
, "TXSIZE_RND ");
635 if (pkt_dev
->flags
& F_UDPSRC_RND
)
636 seq_printf(seq
, "UDPSRC_RND ");
638 if (pkt_dev
->flags
& F_UDPDST_RND
)
639 seq_printf(seq
, "UDPDST_RND ");
641 if (pkt_dev
->flags
& F_MPLS_RND
)
642 seq_printf(seq
, "MPLS_RND ");
644 if (pkt_dev
->flags
& F_QUEUE_MAP_RND
)
645 seq_printf(seq
, "QUEUE_MAP_RND ");
647 if (pkt_dev
->flags
& F_QUEUE_MAP_CPU
)
648 seq_printf(seq
, "QUEUE_MAP_CPU ");
650 if (pkt_dev
->cflows
) {
651 if (pkt_dev
->flags
& F_FLOW_SEQ
)
652 seq_printf(seq
, "FLOW_SEQ "); /*in sequence flows*/
654 seq_printf(seq
, "FLOW_RND ");
658 if (pkt_dev
->flags
& F_IPSEC_ON
)
659 seq_printf(seq
, "IPSEC ");
662 if (pkt_dev
->flags
& F_MACSRC_RND
)
663 seq_printf(seq
, "MACSRC_RND ");
665 if (pkt_dev
->flags
& F_MACDST_RND
)
666 seq_printf(seq
, "MACDST_RND ");
668 if (pkt_dev
->flags
& F_VID_RND
)
669 seq_printf(seq
, "VID_RND ");
671 if (pkt_dev
->flags
& F_SVID_RND
)
672 seq_printf(seq
, "SVID_RND ");
674 if (pkt_dev
->flags
& F_NODE
)
675 seq_printf(seq
, "NODE_ALLOC ");
679 /* not really stopped, more like last-running-at */
680 stopped
= pkt_dev
->running
? ktime_now() : pkt_dev
->stopped_at
;
681 idle
= pkt_dev
->idle_acc
;
682 do_div(idle
, NSEC_PER_USEC
);
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev
->sofar
,
687 (unsigned long long)pkt_dev
->errors
);
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev
->started_at
),
692 (unsigned long long) ktime_to_us(stopped
),
693 (unsigned long long) idle
);
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev
->seq_num
, pkt_dev
->cur_dst_mac_offset
,
698 pkt_dev
->cur_src_mac_offset
);
700 if (pkt_dev
->flags
& F_IPV6
) {
701 seq_printf(seq
, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
702 &pkt_dev
->cur_in6_saddr
,
703 &pkt_dev
->cur_in6_daddr
);
705 seq_printf(seq
, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
706 pkt_dev
->cur_saddr
, pkt_dev
->cur_daddr
);
708 seq_printf(seq
, " cur_udp_dst: %d cur_udp_src: %d\n",
709 pkt_dev
->cur_udp_dst
, pkt_dev
->cur_udp_src
);
711 seq_printf(seq
, " cur_queue_map: %u\n", pkt_dev
->cur_queue_map
);
713 seq_printf(seq
, " flows: %u\n", pkt_dev
->nflows
);
715 if (pkt_dev
->result
[0])
716 seq_printf(seq
, "Result: %s\n", pkt_dev
->result
);
718 seq_printf(seq
, "Result: Idle\n");
724 static int hex32_arg(const char __user
*user_buffer
, unsigned long maxlen
,
730 for (; i
< maxlen
; i
++) {
734 if (get_user(c
, &user_buffer
[i
]))
736 value
= hex_to_bin(c
);
745 static int count_trail_chars(const char __user
* user_buffer
,
750 for (i
= 0; i
< maxlen
; i
++) {
752 if (get_user(c
, &user_buffer
[i
]))
770 static unsigned long num_arg(const char __user
* user_buffer
,
771 unsigned long maxlen
, unsigned long *num
)
776 for (i
= 0; i
< maxlen
; i
++) {
778 if (get_user(c
, &user_buffer
[i
]))
780 if ((c
>= '0') && (c
<= '9')) {
789 static int strn_len(const char __user
* user_buffer
, unsigned int maxlen
)
793 for (i
= 0; i
< maxlen
; i
++) {
795 if (get_user(c
, &user_buffer
[i
]))
813 static ssize_t
get_labels(const char __user
*buffer
, struct pktgen_dev
*pkt_dev
)
820 pkt_dev
->nr_labels
= 0;
823 len
= hex32_arg(&buffer
[i
], 8, &tmp
);
826 pkt_dev
->labels
[n
] = htonl(tmp
);
827 if (pkt_dev
->labels
[n
] & MPLS_STACK_BOTTOM
)
828 pkt_dev
->flags
|= F_MPLS_RND
;
830 if (get_user(c
, &buffer
[i
]))
834 if (n
>= MAX_MPLS_LABELS
)
838 pkt_dev
->nr_labels
= n
;
842 static ssize_t
pktgen_if_write(struct file
*file
,
843 const char __user
* user_buffer
, size_t count
,
846 struct seq_file
*seq
= file
->private_data
;
847 struct pktgen_dev
*pkt_dev
= seq
->private;
849 char name
[16], valstr
[32];
850 unsigned long value
= 0;
851 char *pg_result
= NULL
;
855 pg_result
= &(pkt_dev
->result
[0]);
858 pr_warning("wrong command format\n");
863 tmp
= count_trail_chars(user_buffer
, max
);
865 pr_warning("illegal format\n");
870 /* Read variable name */
872 len
= strn_len(&user_buffer
[i
], sizeof(name
) - 1);
876 memset(name
, 0, sizeof(name
));
877 if (copy_from_user(name
, &user_buffer
[i
], len
))
882 len
= count_trail_chars(&user_buffer
[i
], max
);
889 size_t copy
= min_t(size_t, count
, 1023);
891 if (copy_from_user(tb
, user_buffer
, copy
))
894 printk(KERN_DEBUG
"pktgen: %s,%lu buffer -:%s:-\n", name
,
895 (unsigned long)count
, tb
);
898 if (!strcmp(name
, "min_pkt_size")) {
899 len
= num_arg(&user_buffer
[i
], 10, &value
);
904 if (value
< 14 + 20 + 8)
906 if (value
!= pkt_dev
->min_pkt_size
) {
907 pkt_dev
->min_pkt_size
= value
;
908 pkt_dev
->cur_pkt_size
= value
;
910 sprintf(pg_result
, "OK: min_pkt_size=%u",
911 pkt_dev
->min_pkt_size
);
915 if (!strcmp(name
, "max_pkt_size")) {
916 len
= num_arg(&user_buffer
[i
], 10, &value
);
921 if (value
< 14 + 20 + 8)
923 if (value
!= pkt_dev
->max_pkt_size
) {
924 pkt_dev
->max_pkt_size
= value
;
925 pkt_dev
->cur_pkt_size
= value
;
927 sprintf(pg_result
, "OK: max_pkt_size=%u",
928 pkt_dev
->max_pkt_size
);
932 /* Shortcut for min = max */
934 if (!strcmp(name
, "pkt_size")) {
935 len
= num_arg(&user_buffer
[i
], 10, &value
);
940 if (value
< 14 + 20 + 8)
942 if (value
!= pkt_dev
->min_pkt_size
) {
943 pkt_dev
->min_pkt_size
= value
;
944 pkt_dev
->max_pkt_size
= value
;
945 pkt_dev
->cur_pkt_size
= value
;
947 sprintf(pg_result
, "OK: pkt_size=%u", pkt_dev
->min_pkt_size
);
951 if (!strcmp(name
, "debug")) {
952 len
= num_arg(&user_buffer
[i
], 10, &value
);
958 sprintf(pg_result
, "OK: debug=%u", debug
);
962 if (!strcmp(name
, "frags")) {
963 len
= num_arg(&user_buffer
[i
], 10, &value
);
968 pkt_dev
->nfrags
= value
;
969 sprintf(pg_result
, "OK: frags=%u", pkt_dev
->nfrags
);
972 if (!strcmp(name
, "delay")) {
973 len
= num_arg(&user_buffer
[i
], 10, &value
);
978 if (value
== 0x7FFFFFFF)
979 pkt_dev
->delay
= ULLONG_MAX
;
981 pkt_dev
->delay
= (u64
)value
;
983 sprintf(pg_result
, "OK: delay=%llu",
984 (unsigned long long) pkt_dev
->delay
);
987 if (!strcmp(name
, "rate")) {
988 len
= num_arg(&user_buffer
[i
], 10, &value
);
995 pkt_dev
->delay
= pkt_dev
->min_pkt_size
*8*NSEC_PER_USEC
/value
;
997 pr_info("Delay set at: %llu ns\n", pkt_dev
->delay
);
999 sprintf(pg_result
, "OK: rate=%lu", value
);
1002 if (!strcmp(name
, "ratep")) {
1003 len
= num_arg(&user_buffer
[i
], 10, &value
);
1010 pkt_dev
->delay
= NSEC_PER_SEC
/value
;
1012 pr_info("Delay set at: %llu ns\n", pkt_dev
->delay
);
1014 sprintf(pg_result
, "OK: rate=%lu", value
);
1017 if (!strcmp(name
, "udp_src_min")) {
1018 len
= num_arg(&user_buffer
[i
], 10, &value
);
1023 if (value
!= pkt_dev
->udp_src_min
) {
1024 pkt_dev
->udp_src_min
= value
;
1025 pkt_dev
->cur_udp_src
= value
;
1027 sprintf(pg_result
, "OK: udp_src_min=%u", pkt_dev
->udp_src_min
);
1030 if (!strcmp(name
, "udp_dst_min")) {
1031 len
= num_arg(&user_buffer
[i
], 10, &value
);
1036 if (value
!= pkt_dev
->udp_dst_min
) {
1037 pkt_dev
->udp_dst_min
= value
;
1038 pkt_dev
->cur_udp_dst
= value
;
1040 sprintf(pg_result
, "OK: udp_dst_min=%u", pkt_dev
->udp_dst_min
);
1043 if (!strcmp(name
, "udp_src_max")) {
1044 len
= num_arg(&user_buffer
[i
], 10, &value
);
1049 if (value
!= pkt_dev
->udp_src_max
) {
1050 pkt_dev
->udp_src_max
= value
;
1051 pkt_dev
->cur_udp_src
= value
;
1053 sprintf(pg_result
, "OK: udp_src_max=%u", pkt_dev
->udp_src_max
);
1056 if (!strcmp(name
, "udp_dst_max")) {
1057 len
= num_arg(&user_buffer
[i
], 10, &value
);
1062 if (value
!= pkt_dev
->udp_dst_max
) {
1063 pkt_dev
->udp_dst_max
= value
;
1064 pkt_dev
->cur_udp_dst
= value
;
1066 sprintf(pg_result
, "OK: udp_dst_max=%u", pkt_dev
->udp_dst_max
);
1069 if (!strcmp(name
, "clone_skb")) {
1070 len
= num_arg(&user_buffer
[i
], 10, &value
);
1074 (!(pkt_dev
->odev
->priv_flags
& IFF_TX_SKB_SHARING
)))
1077 pkt_dev
->clone_skb
= value
;
1079 sprintf(pg_result
, "OK: clone_skb=%d", pkt_dev
->clone_skb
);
1082 if (!strcmp(name
, "count")) {
1083 len
= num_arg(&user_buffer
[i
], 10, &value
);
1088 pkt_dev
->count
= value
;
1089 sprintf(pg_result
, "OK: count=%llu",
1090 (unsigned long long)pkt_dev
->count
);
1093 if (!strcmp(name
, "src_mac_count")) {
1094 len
= num_arg(&user_buffer
[i
], 10, &value
);
1099 if (pkt_dev
->src_mac_count
!= value
) {
1100 pkt_dev
->src_mac_count
= value
;
1101 pkt_dev
->cur_src_mac_offset
= 0;
1103 sprintf(pg_result
, "OK: src_mac_count=%d",
1104 pkt_dev
->src_mac_count
);
1107 if (!strcmp(name
, "dst_mac_count")) {
1108 len
= num_arg(&user_buffer
[i
], 10, &value
);
1113 if (pkt_dev
->dst_mac_count
!= value
) {
1114 pkt_dev
->dst_mac_count
= value
;
1115 pkt_dev
->cur_dst_mac_offset
= 0;
1117 sprintf(pg_result
, "OK: dst_mac_count=%d",
1118 pkt_dev
->dst_mac_count
);
1121 if (!strcmp(name
, "node")) {
1122 len
= num_arg(&user_buffer
[i
], 10, &value
);
1128 if (node_possible(value
)) {
1129 pkt_dev
->node
= value
;
1130 sprintf(pg_result
, "OK: node=%d", pkt_dev
->node
);
1131 if (pkt_dev
->page
) {
1132 put_page(pkt_dev
->page
);
1133 pkt_dev
->page
= NULL
;
1137 sprintf(pg_result
, "ERROR: node not possible");
1140 if (!strcmp(name
, "flag")) {
1143 len
= strn_len(&user_buffer
[i
], sizeof(f
) - 1);
1147 if (copy_from_user(f
, &user_buffer
[i
], len
))
1150 if (strcmp(f
, "IPSRC_RND") == 0)
1151 pkt_dev
->flags
|= F_IPSRC_RND
;
1153 else if (strcmp(f
, "!IPSRC_RND") == 0)
1154 pkt_dev
->flags
&= ~F_IPSRC_RND
;
1156 else if (strcmp(f
, "TXSIZE_RND") == 0)
1157 pkt_dev
->flags
|= F_TXSIZE_RND
;
1159 else if (strcmp(f
, "!TXSIZE_RND") == 0)
1160 pkt_dev
->flags
&= ~F_TXSIZE_RND
;
1162 else if (strcmp(f
, "IPDST_RND") == 0)
1163 pkt_dev
->flags
|= F_IPDST_RND
;
1165 else if (strcmp(f
, "!IPDST_RND") == 0)
1166 pkt_dev
->flags
&= ~F_IPDST_RND
;
1168 else if (strcmp(f
, "UDPSRC_RND") == 0)
1169 pkt_dev
->flags
|= F_UDPSRC_RND
;
1171 else if (strcmp(f
, "!UDPSRC_RND") == 0)
1172 pkt_dev
->flags
&= ~F_UDPSRC_RND
;
1174 else if (strcmp(f
, "UDPDST_RND") == 0)
1175 pkt_dev
->flags
|= F_UDPDST_RND
;
1177 else if (strcmp(f
, "!UDPDST_RND") == 0)
1178 pkt_dev
->flags
&= ~F_UDPDST_RND
;
1180 else if (strcmp(f
, "MACSRC_RND") == 0)
1181 pkt_dev
->flags
|= F_MACSRC_RND
;
1183 else if (strcmp(f
, "!MACSRC_RND") == 0)
1184 pkt_dev
->flags
&= ~F_MACSRC_RND
;
1186 else if (strcmp(f
, "MACDST_RND") == 0)
1187 pkt_dev
->flags
|= F_MACDST_RND
;
1189 else if (strcmp(f
, "!MACDST_RND") == 0)
1190 pkt_dev
->flags
&= ~F_MACDST_RND
;
1192 else if (strcmp(f
, "MPLS_RND") == 0)
1193 pkt_dev
->flags
|= F_MPLS_RND
;
1195 else if (strcmp(f
, "!MPLS_RND") == 0)
1196 pkt_dev
->flags
&= ~F_MPLS_RND
;
1198 else if (strcmp(f
, "VID_RND") == 0)
1199 pkt_dev
->flags
|= F_VID_RND
;
1201 else if (strcmp(f
, "!VID_RND") == 0)
1202 pkt_dev
->flags
&= ~F_VID_RND
;
1204 else if (strcmp(f
, "SVID_RND") == 0)
1205 pkt_dev
->flags
|= F_SVID_RND
;
1207 else if (strcmp(f
, "!SVID_RND") == 0)
1208 pkt_dev
->flags
&= ~F_SVID_RND
;
1210 else if (strcmp(f
, "FLOW_SEQ") == 0)
1211 pkt_dev
->flags
|= F_FLOW_SEQ
;
1213 else if (strcmp(f
, "QUEUE_MAP_RND") == 0)
1214 pkt_dev
->flags
|= F_QUEUE_MAP_RND
;
1216 else if (strcmp(f
, "!QUEUE_MAP_RND") == 0)
1217 pkt_dev
->flags
&= ~F_QUEUE_MAP_RND
;
1219 else if (strcmp(f
, "QUEUE_MAP_CPU") == 0)
1220 pkt_dev
->flags
|= F_QUEUE_MAP_CPU
;
1222 else if (strcmp(f
, "!QUEUE_MAP_CPU") == 0)
1223 pkt_dev
->flags
&= ~F_QUEUE_MAP_CPU
;
1225 else if (strcmp(f
, "IPSEC") == 0)
1226 pkt_dev
->flags
|= F_IPSEC_ON
;
1229 else if (strcmp(f
, "!IPV6") == 0)
1230 pkt_dev
->flags
&= ~F_IPV6
;
1232 else if (strcmp(f
, "NODE_ALLOC") == 0)
1233 pkt_dev
->flags
|= F_NODE
;
1235 else if (strcmp(f
, "!NODE_ALLOC") == 0)
1236 pkt_dev
->flags
&= ~F_NODE
;
1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1246 sprintf(pg_result
, "OK: flags=0x%x", pkt_dev
->flags
);
1249 if (!strcmp(name
, "dst_min") || !strcmp(name
, "dst")) {
1250 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->dst_min
) - 1);
1254 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1257 if (strcmp(buf
, pkt_dev
->dst_min
) != 0) {
1258 memset(pkt_dev
->dst_min
, 0, sizeof(pkt_dev
->dst_min
));
1259 strncpy(pkt_dev
->dst_min
, buf
, len
);
1260 pkt_dev
->daddr_min
= in_aton(pkt_dev
->dst_min
);
1261 pkt_dev
->cur_daddr
= pkt_dev
->daddr_min
;
1264 printk(KERN_DEBUG
"pktgen: dst_min set to: %s\n",
1267 sprintf(pg_result
, "OK: dst_min=%s", pkt_dev
->dst_min
);
1270 if (!strcmp(name
, "dst_max")) {
1271 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->dst_max
) - 1);
1276 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1280 if (strcmp(buf
, pkt_dev
->dst_max
) != 0) {
1281 memset(pkt_dev
->dst_max
, 0, sizeof(pkt_dev
->dst_max
));
1282 strncpy(pkt_dev
->dst_max
, buf
, len
);
1283 pkt_dev
->daddr_max
= in_aton(pkt_dev
->dst_max
);
1284 pkt_dev
->cur_daddr
= pkt_dev
->daddr_max
;
1287 printk(KERN_DEBUG
"pktgen: dst_max set to: %s\n",
1290 sprintf(pg_result
, "OK: dst_max=%s", pkt_dev
->dst_max
);
1293 if (!strcmp(name
, "dst6")) {
1294 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1298 pkt_dev
->flags
|= F_IPV6
;
1300 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1304 scan_ip6(buf
, pkt_dev
->in6_daddr
.s6_addr
);
1305 snprintf(buf
, sizeof(buf
), "%pI6c", &pkt_dev
->in6_daddr
);
1307 ipv6_addr_copy(&pkt_dev
->cur_in6_daddr
, &pkt_dev
->in6_daddr
);
1310 printk(KERN_DEBUG
"pktgen: dst6 set to: %s\n", buf
);
1313 sprintf(pg_result
, "OK: dst6=%s", buf
);
1316 if (!strcmp(name
, "dst6_min")) {
1317 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1321 pkt_dev
->flags
|= F_IPV6
;
1323 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1327 scan_ip6(buf
, pkt_dev
->min_in6_daddr
.s6_addr
);
1328 snprintf(buf
, sizeof(buf
), "%pI6c", &pkt_dev
->min_in6_daddr
);
1330 ipv6_addr_copy(&pkt_dev
->cur_in6_daddr
,
1331 &pkt_dev
->min_in6_daddr
);
1333 printk(KERN_DEBUG
"pktgen: dst6_min set to: %s\n", buf
);
1336 sprintf(pg_result
, "OK: dst6_min=%s", buf
);
1339 if (!strcmp(name
, "dst6_max")) {
1340 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1344 pkt_dev
->flags
|= F_IPV6
;
1346 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1350 scan_ip6(buf
, pkt_dev
->max_in6_daddr
.s6_addr
);
1351 snprintf(buf
, sizeof(buf
), "%pI6c", &pkt_dev
->max_in6_daddr
);
1354 printk(KERN_DEBUG
"pktgen: dst6_max set to: %s\n", buf
);
1357 sprintf(pg_result
, "OK: dst6_max=%s", buf
);
1360 if (!strcmp(name
, "src6")) {
1361 len
= strn_len(&user_buffer
[i
], sizeof(buf
) - 1);
1365 pkt_dev
->flags
|= F_IPV6
;
1367 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1371 scan_ip6(buf
, pkt_dev
->in6_saddr
.s6_addr
);
1372 snprintf(buf
, sizeof(buf
), "%pI6c", &pkt_dev
->in6_saddr
);
1374 ipv6_addr_copy(&pkt_dev
->cur_in6_saddr
, &pkt_dev
->in6_saddr
);
1377 printk(KERN_DEBUG
"pktgen: src6 set to: %s\n", buf
);
1380 sprintf(pg_result
, "OK: src6=%s", buf
);
1383 if (!strcmp(name
, "src_min")) {
1384 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->src_min
) - 1);
1388 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1391 if (strcmp(buf
, pkt_dev
->src_min
) != 0) {
1392 memset(pkt_dev
->src_min
, 0, sizeof(pkt_dev
->src_min
));
1393 strncpy(pkt_dev
->src_min
, buf
, len
);
1394 pkt_dev
->saddr_min
= in_aton(pkt_dev
->src_min
);
1395 pkt_dev
->cur_saddr
= pkt_dev
->saddr_min
;
1398 printk(KERN_DEBUG
"pktgen: src_min set to: %s\n",
1401 sprintf(pg_result
, "OK: src_min=%s", pkt_dev
->src_min
);
1404 if (!strcmp(name
, "src_max")) {
1405 len
= strn_len(&user_buffer
[i
], sizeof(pkt_dev
->src_max
) - 1);
1409 if (copy_from_user(buf
, &user_buffer
[i
], len
))
1412 if (strcmp(buf
, pkt_dev
->src_max
) != 0) {
1413 memset(pkt_dev
->src_max
, 0, sizeof(pkt_dev
->src_max
));
1414 strncpy(pkt_dev
->src_max
, buf
, len
);
1415 pkt_dev
->saddr_max
= in_aton(pkt_dev
->src_max
);
1416 pkt_dev
->cur_saddr
= pkt_dev
->saddr_max
;
1419 printk(KERN_DEBUG
"pktgen: src_max set to: %s\n",
1422 sprintf(pg_result
, "OK: src_max=%s", pkt_dev
->src_max
);
1425 if (!strcmp(name
, "dst_mac")) {
1426 len
= strn_len(&user_buffer
[i
], sizeof(valstr
) - 1);
1430 memset(valstr
, 0, sizeof(valstr
));
1431 if (copy_from_user(valstr
, &user_buffer
[i
], len
))
1434 if (!mac_pton(valstr
, pkt_dev
->dst_mac
))
1436 /* Set up Dest MAC */
1437 memcpy(&pkt_dev
->hh
[0], pkt_dev
->dst_mac
, ETH_ALEN
);
1439 sprintf(pg_result
, "OK: dstmac %pM", pkt_dev
->dst_mac
);
1442 if (!strcmp(name
, "src_mac")) {
1443 len
= strn_len(&user_buffer
[i
], sizeof(valstr
) - 1);
1447 memset(valstr
, 0, sizeof(valstr
));
1448 if (copy_from_user(valstr
, &user_buffer
[i
], len
))
1451 if (!mac_pton(valstr
, pkt_dev
->src_mac
))
1453 /* Set up Src MAC */
1454 memcpy(&pkt_dev
->hh
[6], pkt_dev
->src_mac
, ETH_ALEN
);
1456 sprintf(pg_result
, "OK: srcmac %pM", pkt_dev
->src_mac
);
1460 if (!strcmp(name
, "clear_counters")) {
1461 pktgen_clear_counters(pkt_dev
);
1462 sprintf(pg_result
, "OK: Clearing counters.\n");
1466 if (!strcmp(name
, "flows")) {
1467 len
= num_arg(&user_buffer
[i
], 10, &value
);
1472 if (value
> MAX_CFLOWS
)
1475 pkt_dev
->cflows
= value
;
1476 sprintf(pg_result
, "OK: flows=%u", pkt_dev
->cflows
);
1480 if (!strcmp(name
, "flowlen")) {
1481 len
= num_arg(&user_buffer
[i
], 10, &value
);
1486 pkt_dev
->lflow
= value
;
1487 sprintf(pg_result
, "OK: flowlen=%u", pkt_dev
->lflow
);
1491 if (!strcmp(name
, "queue_map_min")) {
1492 len
= num_arg(&user_buffer
[i
], 5, &value
);
1497 pkt_dev
->queue_map_min
= value
;
1498 sprintf(pg_result
, "OK: queue_map_min=%u", pkt_dev
->queue_map_min
);
1502 if (!strcmp(name
, "queue_map_max")) {
1503 len
= num_arg(&user_buffer
[i
], 5, &value
);
1508 pkt_dev
->queue_map_max
= value
;
1509 sprintf(pg_result
, "OK: queue_map_max=%u", pkt_dev
->queue_map_max
);
1513 if (!strcmp(name
, "mpls")) {
1516 len
= get_labels(&user_buffer
[i
], pkt_dev
);
1520 cnt
= sprintf(pg_result
, "OK: mpls=");
1521 for (n
= 0; n
< pkt_dev
->nr_labels
; n
++)
1522 cnt
+= sprintf(pg_result
+ cnt
,
1523 "%08x%s", ntohl(pkt_dev
->labels
[n
]),
1524 n
== pkt_dev
->nr_labels
-1 ? "" : ",");
1526 if (pkt_dev
->nr_labels
&& pkt_dev
->vlan_id
!= 0xffff) {
1527 pkt_dev
->vlan_id
= 0xffff; /* turn off VLAN/SVLAN */
1528 pkt_dev
->svlan_id
= 0xffff;
1531 printk(KERN_DEBUG
"pktgen: VLAN/SVLAN auto turned off\n");
1536 if (!strcmp(name
, "vlan_id")) {
1537 len
= num_arg(&user_buffer
[i
], 4, &value
);
1542 if (value
<= 4095) {
1543 pkt_dev
->vlan_id
= value
; /* turn on VLAN */
1546 printk(KERN_DEBUG
"pktgen: VLAN turned on\n");
1548 if (debug
&& pkt_dev
->nr_labels
)
1549 printk(KERN_DEBUG
"pktgen: MPLS auto turned off\n");
1551 pkt_dev
->nr_labels
= 0; /* turn off MPLS */
1552 sprintf(pg_result
, "OK: vlan_id=%u", pkt_dev
->vlan_id
);
1554 pkt_dev
->vlan_id
= 0xffff; /* turn off VLAN/SVLAN */
1555 pkt_dev
->svlan_id
= 0xffff;
1558 printk(KERN_DEBUG
"pktgen: VLAN/SVLAN turned off\n");
1563 if (!strcmp(name
, "vlan_p")) {
1564 len
= num_arg(&user_buffer
[i
], 1, &value
);
1569 if ((value
<= 7) && (pkt_dev
->vlan_id
!= 0xffff)) {
1570 pkt_dev
->vlan_p
= value
;
1571 sprintf(pg_result
, "OK: vlan_p=%u", pkt_dev
->vlan_p
);
1573 sprintf(pg_result
, "ERROR: vlan_p must be 0-7");
1578 if (!strcmp(name
, "vlan_cfi")) {
1579 len
= num_arg(&user_buffer
[i
], 1, &value
);
1584 if ((value
<= 1) && (pkt_dev
->vlan_id
!= 0xffff)) {
1585 pkt_dev
->vlan_cfi
= value
;
1586 sprintf(pg_result
, "OK: vlan_cfi=%u", pkt_dev
->vlan_cfi
);
1588 sprintf(pg_result
, "ERROR: vlan_cfi must be 0-1");
1593 if (!strcmp(name
, "svlan_id")) {
1594 len
= num_arg(&user_buffer
[i
], 4, &value
);
1599 if ((value
<= 4095) && ((pkt_dev
->vlan_id
!= 0xffff))) {
1600 pkt_dev
->svlan_id
= value
; /* turn on SVLAN */
1603 printk(KERN_DEBUG
"pktgen: SVLAN turned on\n");
1605 if (debug
&& pkt_dev
->nr_labels
)
1606 printk(KERN_DEBUG
"pktgen: MPLS auto turned off\n");
1608 pkt_dev
->nr_labels
= 0; /* turn off MPLS */
1609 sprintf(pg_result
, "OK: svlan_id=%u", pkt_dev
->svlan_id
);
1611 pkt_dev
->vlan_id
= 0xffff; /* turn off VLAN/SVLAN */
1612 pkt_dev
->svlan_id
= 0xffff;
1615 printk(KERN_DEBUG
"pktgen: VLAN/SVLAN turned off\n");
1620 if (!strcmp(name
, "svlan_p")) {
1621 len
= num_arg(&user_buffer
[i
], 1, &value
);
1626 if ((value
<= 7) && (pkt_dev
->svlan_id
!= 0xffff)) {
1627 pkt_dev
->svlan_p
= value
;
1628 sprintf(pg_result
, "OK: svlan_p=%u", pkt_dev
->svlan_p
);
1630 sprintf(pg_result
, "ERROR: svlan_p must be 0-7");
1635 if (!strcmp(name
, "svlan_cfi")) {
1636 len
= num_arg(&user_buffer
[i
], 1, &value
);
1641 if ((value
<= 1) && (pkt_dev
->svlan_id
!= 0xffff)) {
1642 pkt_dev
->svlan_cfi
= value
;
1643 sprintf(pg_result
, "OK: svlan_cfi=%u", pkt_dev
->svlan_cfi
);
1645 sprintf(pg_result
, "ERROR: svlan_cfi must be 0-1");
1650 if (!strcmp(name
, "tos")) {
1651 __u32 tmp_value
= 0;
1652 len
= hex32_arg(&user_buffer
[i
], 2, &tmp_value
);
1658 pkt_dev
->tos
= tmp_value
;
1659 sprintf(pg_result
, "OK: tos=0x%02x", pkt_dev
->tos
);
1661 sprintf(pg_result
, "ERROR: tos must be 00-ff");
1666 if (!strcmp(name
, "traffic_class")) {
1667 __u32 tmp_value
= 0;
1668 len
= hex32_arg(&user_buffer
[i
], 2, &tmp_value
);
1674 pkt_dev
->traffic_class
= tmp_value
;
1675 sprintf(pg_result
, "OK: traffic_class=0x%02x", pkt_dev
->traffic_class
);
1677 sprintf(pg_result
, "ERROR: traffic_class must be 00-ff");
1682 if (!strcmp(name
, "skb_priority")) {
1683 len
= num_arg(&user_buffer
[i
], 9, &value
);
1688 pkt_dev
->skb_priority
= value
;
1689 sprintf(pg_result
, "OK: skb_priority=%i",
1690 pkt_dev
->skb_priority
);
1694 sprintf(pkt_dev
->result
, "No such parameter \"%s\"", name
);
1698 static int pktgen_if_open(struct inode
*inode
, struct file
*file
)
1700 return single_open(file
, pktgen_if_show
, PDE(inode
)->data
);
1703 static const struct file_operations pktgen_if_fops
= {
1704 .owner
= THIS_MODULE
,
1705 .open
= pktgen_if_open
,
1707 .llseek
= seq_lseek
,
1708 .write
= pktgen_if_write
,
1709 .release
= single_release
,
1712 static int pktgen_thread_show(struct seq_file
*seq
, void *v
)
1714 struct pktgen_thread
*t
= seq
->private;
1715 const struct pktgen_dev
*pkt_dev
;
1719 seq_printf(seq
, "Running: ");
1722 list_for_each_entry(pkt_dev
, &t
->if_list
, list
)
1723 if (pkt_dev
->running
)
1724 seq_printf(seq
, "%s ", pkt_dev
->odevname
);
1726 seq_printf(seq
, "\nStopped: ");
1728 list_for_each_entry(pkt_dev
, &t
->if_list
, list
)
1729 if (!pkt_dev
->running
)
1730 seq_printf(seq
, "%s ", pkt_dev
->odevname
);
1733 seq_printf(seq
, "\nResult: %s\n", t
->result
);
1735 seq_printf(seq
, "\nResult: NA\n");
1742 static ssize_t
pktgen_thread_write(struct file
*file
,
1743 const char __user
* user_buffer
,
1744 size_t count
, loff_t
* offset
)
1746 struct seq_file
*seq
= file
->private_data
;
1747 struct pktgen_thread
*t
= seq
->private;
1748 int i
, max
, len
, ret
;
1753 // sprintf(pg_result, "Wrong command format");
1758 len
= count_trail_chars(user_buffer
, max
);
1764 /* Read variable name */
1766 len
= strn_len(&user_buffer
[i
], sizeof(name
) - 1);
1770 memset(name
, 0, sizeof(name
));
1771 if (copy_from_user(name
, &user_buffer
[i
], len
))
1776 len
= count_trail_chars(&user_buffer
[i
], max
);
1783 printk(KERN_DEBUG
"pktgen: t=%s, count=%lu\n",
1784 name
, (unsigned long)count
);
1787 pr_err("ERROR: No thread\n");
1792 pg_result
= &(t
->result
[0]);
1794 if (!strcmp(name
, "add_device")) {
1797 len
= strn_len(&user_buffer
[i
], sizeof(f
) - 1);
1802 if (copy_from_user(f
, &user_buffer
[i
], len
))
1805 mutex_lock(&pktgen_thread_lock
);
1806 pktgen_add_device(t
, f
);
1807 mutex_unlock(&pktgen_thread_lock
);
1809 sprintf(pg_result
, "OK: add_device=%s", f
);
1813 if (!strcmp(name
, "rem_device_all")) {
1814 mutex_lock(&pktgen_thread_lock
);
1815 t
->control
|= T_REMDEVALL
;
1816 mutex_unlock(&pktgen_thread_lock
);
1817 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1819 sprintf(pg_result
, "OK: rem_device_all");
1823 if (!strcmp(name
, "max_before_softirq")) {
1824 sprintf(pg_result
, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1834 static int pktgen_thread_open(struct inode
*inode
, struct file
*file
)
1836 return single_open(file
, pktgen_thread_show
, PDE(inode
)->data
);
1839 static const struct file_operations pktgen_thread_fops
= {
1840 .owner
= THIS_MODULE
,
1841 .open
= pktgen_thread_open
,
1843 .llseek
= seq_lseek
,
1844 .write
= pktgen_thread_write
,
1845 .release
= single_release
,
1848 /* Think find or remove for NN */
1849 static struct pktgen_dev
*__pktgen_NN_threads(const char *ifname
, int remove
)
1851 struct pktgen_thread
*t
;
1852 struct pktgen_dev
*pkt_dev
= NULL
;
1853 bool exact
= (remove
== FIND
);
1855 list_for_each_entry(t
, &pktgen_threads
, th_list
) {
1856 pkt_dev
= pktgen_find_dev(t
, ifname
, exact
);
1860 pkt_dev
->removal_mark
= 1;
1861 t
->control
|= T_REMDEV
;
1871 * mark a device for removal
1873 static void pktgen_mark_device(const char *ifname
)
1875 struct pktgen_dev
*pkt_dev
= NULL
;
1876 const int max_tries
= 10, msec_per_try
= 125;
1879 mutex_lock(&pktgen_thread_lock
);
1880 pr_debug("%s: marking %s for removal\n", __func__
, ifname
);
1884 pkt_dev
= __pktgen_NN_threads(ifname
, REMOVE
);
1885 if (pkt_dev
== NULL
)
1886 break; /* success */
1888 mutex_unlock(&pktgen_thread_lock
);
1889 pr_debug("%s: waiting for %s to disappear....\n",
1891 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try
));
1892 mutex_lock(&pktgen_thread_lock
);
1894 if (++i
>= max_tries
) {
1895 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1896 __func__
, msec_per_try
* i
, ifname
);
1902 mutex_unlock(&pktgen_thread_lock
);
1905 static void pktgen_change_name(struct net_device
*dev
)
1907 struct pktgen_thread
*t
;
1909 list_for_each_entry(t
, &pktgen_threads
, th_list
) {
1910 struct pktgen_dev
*pkt_dev
;
1912 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
1913 if (pkt_dev
->odev
!= dev
)
1916 remove_proc_entry(pkt_dev
->entry
->name
, pg_proc_dir
);
1918 pkt_dev
->entry
= proc_create_data(dev
->name
, 0600,
1922 if (!pkt_dev
->entry
)
1923 pr_err("can't move proc entry for '%s'\n",
1930 static int pktgen_device_event(struct notifier_block
*unused
,
1931 unsigned long event
, void *ptr
)
1933 struct net_device
*dev
= ptr
;
1935 if (!net_eq(dev_net(dev
), &init_net
))
1938 /* It is OK that we do not hold the group lock right now,
1939 * as we run under the RTNL lock.
1943 case NETDEV_CHANGENAME
:
1944 pktgen_change_name(dev
);
1947 case NETDEV_UNREGISTER
:
1948 pktgen_mark_device(dev
->name
);
1955 static struct net_device
*pktgen_dev_get_by_name(struct pktgen_dev
*pkt_dev
,
1961 for (i
= 0; ifname
[i
] != '@'; i
++) {
1969 return dev_get_by_name(&init_net
, b
);
1973 /* Associate pktgen_dev with a device. */
1975 static int pktgen_setup_dev(struct pktgen_dev
*pkt_dev
, const char *ifname
)
1977 struct net_device
*odev
;
1980 /* Clean old setups */
1981 if (pkt_dev
->odev
) {
1982 dev_put(pkt_dev
->odev
);
1983 pkt_dev
->odev
= NULL
;
1986 odev
= pktgen_dev_get_by_name(pkt_dev
, ifname
);
1988 pr_err("no such netdevice: \"%s\"\n", ifname
);
1992 if (odev
->type
!= ARPHRD_ETHER
) {
1993 pr_err("not an ethernet device: \"%s\"\n", ifname
);
1995 } else if (!netif_running(odev
)) {
1996 pr_err("device is down: \"%s\"\n", ifname
);
1999 pkt_dev
->odev
= odev
;
2007 /* Read pkt_dev from the interface and set up internal pktgen_dev
2008 * structure to have the right information to create/send packets
2010 static void pktgen_setup_inject(struct pktgen_dev
*pkt_dev
)
2014 if (!pkt_dev
->odev
) {
2015 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2016 sprintf(pkt_dev
->result
,
2017 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2021 /* make sure that we don't pick a non-existing transmit queue */
2022 ntxq
= pkt_dev
->odev
->real_num_tx_queues
;
2024 if (ntxq
<= pkt_dev
->queue_map_min
) {
2025 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2026 pkt_dev
->queue_map_min
, (ntxq
?: 1) - 1, ntxq
,
2028 pkt_dev
->queue_map_min
= ntxq
- 1;
2030 if (pkt_dev
->queue_map_max
>= ntxq
) {
2031 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2032 pkt_dev
->queue_map_max
, (ntxq
?: 1) - 1, ntxq
,
2034 pkt_dev
->queue_map_max
= ntxq
- 1;
2037 /* Default to the interface's mac if not explicitly set. */
2039 if (is_zero_ether_addr(pkt_dev
->src_mac
))
2040 memcpy(&(pkt_dev
->hh
[6]), pkt_dev
->odev
->dev_addr
, ETH_ALEN
);
2042 /* Set up Dest MAC */
2043 memcpy(&(pkt_dev
->hh
[0]), pkt_dev
->dst_mac
, ETH_ALEN
);
2045 /* Set up pkt size */
2046 pkt_dev
->cur_pkt_size
= pkt_dev
->min_pkt_size
;
2048 if (pkt_dev
->flags
& F_IPV6
) {
2050 * Skip this automatic address setting until locks or functions
2055 int i
, set
= 0, err
= 1;
2056 struct inet6_dev
*idev
;
2058 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
2059 if (pkt_dev
->cur_in6_saddr
.s6_addr
[i
]) {
2067 * Use linklevel address if unconfigured.
2069 * use ipv6_get_lladdr if/when it's get exported
2073 idev
= __in6_dev_get(pkt_dev
->odev
);
2075 struct inet6_ifaddr
*ifp
;
2077 read_lock_bh(&idev
->lock
);
2078 for (ifp
= idev
->addr_list
; ifp
;
2079 ifp
= ifp
->if_next
) {
2080 if (ifp
->scope
== IFA_LINK
&&
2081 !(ifp
->flags
& IFA_F_TENTATIVE
)) {
2082 ipv6_addr_copy(&pkt_dev
->
2089 read_unlock_bh(&idev
->lock
);
2093 pr_err("ERROR: IPv6 link address not available\n");
2097 pkt_dev
->saddr_min
= 0;
2098 pkt_dev
->saddr_max
= 0;
2099 if (strlen(pkt_dev
->src_min
) == 0) {
2101 struct in_device
*in_dev
;
2104 in_dev
= __in_dev_get_rcu(pkt_dev
->odev
);
2106 if (in_dev
->ifa_list
) {
2107 pkt_dev
->saddr_min
=
2108 in_dev
->ifa_list
->ifa_address
;
2109 pkt_dev
->saddr_max
= pkt_dev
->saddr_min
;
2114 pkt_dev
->saddr_min
= in_aton(pkt_dev
->src_min
);
2115 pkt_dev
->saddr_max
= in_aton(pkt_dev
->src_max
);
2118 pkt_dev
->daddr_min
= in_aton(pkt_dev
->dst_min
);
2119 pkt_dev
->daddr_max
= in_aton(pkt_dev
->dst_max
);
2121 /* Initialize current values. */
2122 pkt_dev
->cur_dst_mac_offset
= 0;
2123 pkt_dev
->cur_src_mac_offset
= 0;
2124 pkt_dev
->cur_saddr
= pkt_dev
->saddr_min
;
2125 pkt_dev
->cur_daddr
= pkt_dev
->daddr_min
;
2126 pkt_dev
->cur_udp_dst
= pkt_dev
->udp_dst_min
;
2127 pkt_dev
->cur_udp_src
= pkt_dev
->udp_src_min
;
2128 pkt_dev
->nflows
= 0;
2132 static void spin(struct pktgen_dev
*pkt_dev
, ktime_t spin_until
)
2134 ktime_t start_time
, end_time
;
2136 struct hrtimer_sleeper t
;
2138 hrtimer_init_on_stack(&t
.timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_ABS
);
2139 hrtimer_set_expires(&t
.timer
, spin_until
);
2141 remaining
= ktime_to_ns(hrtimer_expires_remaining(&t
.timer
));
2142 if (remaining
<= 0) {
2143 pkt_dev
->next_tx
= ktime_add_ns(spin_until
, pkt_dev
->delay
);
2147 start_time
= ktime_now();
2148 if (remaining
< 100000)
2149 ndelay(remaining
); /* really small just spin */
2151 /* see do_nanosleep */
2152 hrtimer_init_sleeper(&t
, current
);
2154 set_current_state(TASK_INTERRUPTIBLE
);
2155 hrtimer_start_expires(&t
.timer
, HRTIMER_MODE_ABS
);
2156 if (!hrtimer_active(&t
.timer
))
2162 hrtimer_cancel(&t
.timer
);
2163 } while (t
.task
&& pkt_dev
->running
&& !signal_pending(current
));
2164 __set_current_state(TASK_RUNNING
);
2166 end_time
= ktime_now();
2168 pkt_dev
->idle_acc
+= ktime_to_ns(ktime_sub(end_time
, start_time
));
2169 pkt_dev
->next_tx
= ktime_add_ns(spin_until
, pkt_dev
->delay
);
2172 static inline void set_pkt_overhead(struct pktgen_dev
*pkt_dev
)
2174 pkt_dev
->pkt_overhead
= 0;
2175 pkt_dev
->pkt_overhead
+= pkt_dev
->nr_labels
*sizeof(u32
);
2176 pkt_dev
->pkt_overhead
+= VLAN_TAG_SIZE(pkt_dev
);
2177 pkt_dev
->pkt_overhead
+= SVLAN_TAG_SIZE(pkt_dev
);
2180 static inline int f_seen(const struct pktgen_dev
*pkt_dev
, int flow
)
2182 return !!(pkt_dev
->flows
[flow
].flags
& F_INIT
);
2185 static inline int f_pick(struct pktgen_dev
*pkt_dev
)
2187 int flow
= pkt_dev
->curfl
;
2189 if (pkt_dev
->flags
& F_FLOW_SEQ
) {
2190 if (pkt_dev
->flows
[flow
].count
>= pkt_dev
->lflow
) {
2192 pkt_dev
->flows
[flow
].count
= 0;
2193 pkt_dev
->flows
[flow
].flags
= 0;
2194 pkt_dev
->curfl
+= 1;
2195 if (pkt_dev
->curfl
>= pkt_dev
->cflows
)
2196 pkt_dev
->curfl
= 0; /*reset */
2199 flow
= random32() % pkt_dev
->cflows
;
2200 pkt_dev
->curfl
= flow
;
2202 if (pkt_dev
->flows
[flow
].count
> pkt_dev
->lflow
) {
2203 pkt_dev
->flows
[flow
].count
= 0;
2204 pkt_dev
->flows
[flow
].flags
= 0;
2208 return pkt_dev
->curfl
;
2213 /* If there was already an IPSEC SA, we keep it as is, else
2214 * we go look for it ...
2216 #define DUMMY_MARK 0
2217 static void get_ipsec_sa(struct pktgen_dev
*pkt_dev
, int flow
)
2219 struct xfrm_state
*x
= pkt_dev
->flows
[flow
].x
;
2221 /*slow path: we dont already have xfrm_state*/
2222 x
= xfrm_stateonly_find(&init_net
, DUMMY_MARK
,
2223 (xfrm_address_t
*)&pkt_dev
->cur_daddr
,
2224 (xfrm_address_t
*)&pkt_dev
->cur_saddr
,
2227 pkt_dev
->ipsproto
, 0);
2229 pkt_dev
->flows
[flow
].x
= x
;
2230 set_pkt_overhead(pkt_dev
);
2231 pkt_dev
->pkt_overhead
+= x
->props
.header_len
;
2237 static void set_cur_queue_map(struct pktgen_dev
*pkt_dev
)
2240 if (pkt_dev
->flags
& F_QUEUE_MAP_CPU
)
2241 pkt_dev
->cur_queue_map
= smp_processor_id();
2243 else if (pkt_dev
->queue_map_min
<= pkt_dev
->queue_map_max
) {
2245 if (pkt_dev
->flags
& F_QUEUE_MAP_RND
) {
2247 (pkt_dev
->queue_map_max
-
2248 pkt_dev
->queue_map_min
+ 1)
2249 + pkt_dev
->queue_map_min
;
2251 t
= pkt_dev
->cur_queue_map
+ 1;
2252 if (t
> pkt_dev
->queue_map_max
)
2253 t
= pkt_dev
->queue_map_min
;
2255 pkt_dev
->cur_queue_map
= t
;
2257 pkt_dev
->cur_queue_map
= pkt_dev
->cur_queue_map
% pkt_dev
->odev
->real_num_tx_queues
;
2260 /* Increment/randomize headers according to flags and current values
2261 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2263 static void mod_cur_headers(struct pktgen_dev
*pkt_dev
)
2269 if (pkt_dev
->cflows
)
2270 flow
= f_pick(pkt_dev
);
2272 /* Deal with source MAC */
2273 if (pkt_dev
->src_mac_count
> 1) {
2277 if (pkt_dev
->flags
& F_MACSRC_RND
)
2278 mc
= random32() % pkt_dev
->src_mac_count
;
2280 mc
= pkt_dev
->cur_src_mac_offset
++;
2281 if (pkt_dev
->cur_src_mac_offset
>=
2282 pkt_dev
->src_mac_count
)
2283 pkt_dev
->cur_src_mac_offset
= 0;
2286 tmp
= pkt_dev
->src_mac
[5] + (mc
& 0xFF);
2287 pkt_dev
->hh
[11] = tmp
;
2288 tmp
= (pkt_dev
->src_mac
[4] + ((mc
>> 8) & 0xFF) + (tmp
>> 8));
2289 pkt_dev
->hh
[10] = tmp
;
2290 tmp
= (pkt_dev
->src_mac
[3] + ((mc
>> 16) & 0xFF) + (tmp
>> 8));
2291 pkt_dev
->hh
[9] = tmp
;
2292 tmp
= (pkt_dev
->src_mac
[2] + ((mc
>> 24) & 0xFF) + (tmp
>> 8));
2293 pkt_dev
->hh
[8] = tmp
;
2294 tmp
= (pkt_dev
->src_mac
[1] + (tmp
>> 8));
2295 pkt_dev
->hh
[7] = tmp
;
2298 /* Deal with Destination MAC */
2299 if (pkt_dev
->dst_mac_count
> 1) {
2303 if (pkt_dev
->flags
& F_MACDST_RND
)
2304 mc
= random32() % pkt_dev
->dst_mac_count
;
2307 mc
= pkt_dev
->cur_dst_mac_offset
++;
2308 if (pkt_dev
->cur_dst_mac_offset
>=
2309 pkt_dev
->dst_mac_count
) {
2310 pkt_dev
->cur_dst_mac_offset
= 0;
2314 tmp
= pkt_dev
->dst_mac
[5] + (mc
& 0xFF);
2315 pkt_dev
->hh
[5] = tmp
;
2316 tmp
= (pkt_dev
->dst_mac
[4] + ((mc
>> 8) & 0xFF) + (tmp
>> 8));
2317 pkt_dev
->hh
[4] = tmp
;
2318 tmp
= (pkt_dev
->dst_mac
[3] + ((mc
>> 16) & 0xFF) + (tmp
>> 8));
2319 pkt_dev
->hh
[3] = tmp
;
2320 tmp
= (pkt_dev
->dst_mac
[2] + ((mc
>> 24) & 0xFF) + (tmp
>> 8));
2321 pkt_dev
->hh
[2] = tmp
;
2322 tmp
= (pkt_dev
->dst_mac
[1] + (tmp
>> 8));
2323 pkt_dev
->hh
[1] = tmp
;
2326 if (pkt_dev
->flags
& F_MPLS_RND
) {
2328 for (i
= 0; i
< pkt_dev
->nr_labels
; i
++)
2329 if (pkt_dev
->labels
[i
] & MPLS_STACK_BOTTOM
)
2330 pkt_dev
->labels
[i
] = MPLS_STACK_BOTTOM
|
2331 ((__force __be32
)random32() &
2335 if ((pkt_dev
->flags
& F_VID_RND
) && (pkt_dev
->vlan_id
!= 0xffff)) {
2336 pkt_dev
->vlan_id
= random32() & (4096-1);
2339 if ((pkt_dev
->flags
& F_SVID_RND
) && (pkt_dev
->svlan_id
!= 0xffff)) {
2340 pkt_dev
->svlan_id
= random32() & (4096 - 1);
2343 if (pkt_dev
->udp_src_min
< pkt_dev
->udp_src_max
) {
2344 if (pkt_dev
->flags
& F_UDPSRC_RND
)
2345 pkt_dev
->cur_udp_src
= random32() %
2346 (pkt_dev
->udp_src_max
- pkt_dev
->udp_src_min
)
2347 + pkt_dev
->udp_src_min
;
2350 pkt_dev
->cur_udp_src
++;
2351 if (pkt_dev
->cur_udp_src
>= pkt_dev
->udp_src_max
)
2352 pkt_dev
->cur_udp_src
= pkt_dev
->udp_src_min
;
2356 if (pkt_dev
->udp_dst_min
< pkt_dev
->udp_dst_max
) {
2357 if (pkt_dev
->flags
& F_UDPDST_RND
) {
2358 pkt_dev
->cur_udp_dst
= random32() %
2359 (pkt_dev
->udp_dst_max
- pkt_dev
->udp_dst_min
)
2360 + pkt_dev
->udp_dst_min
;
2362 pkt_dev
->cur_udp_dst
++;
2363 if (pkt_dev
->cur_udp_dst
>= pkt_dev
->udp_dst_max
)
2364 pkt_dev
->cur_udp_dst
= pkt_dev
->udp_dst_min
;
2368 if (!(pkt_dev
->flags
& F_IPV6
)) {
2370 imn
= ntohl(pkt_dev
->saddr_min
);
2371 imx
= ntohl(pkt_dev
->saddr_max
);
2374 if (pkt_dev
->flags
& F_IPSRC_RND
)
2375 t
= random32() % (imx
- imn
) + imn
;
2377 t
= ntohl(pkt_dev
->cur_saddr
);
2383 pkt_dev
->cur_saddr
= htonl(t
);
2386 if (pkt_dev
->cflows
&& f_seen(pkt_dev
, flow
)) {
2387 pkt_dev
->cur_daddr
= pkt_dev
->flows
[flow
].cur_daddr
;
2389 imn
= ntohl(pkt_dev
->daddr_min
);
2390 imx
= ntohl(pkt_dev
->daddr_max
);
2394 if (pkt_dev
->flags
& F_IPDST_RND
) {
2396 t
= random32() % (imx
- imn
) + imn
;
2399 while (ipv4_is_loopback(s
) ||
2400 ipv4_is_multicast(s
) ||
2401 ipv4_is_lbcast(s
) ||
2402 ipv4_is_zeronet(s
) ||
2403 ipv4_is_local_multicast(s
)) {
2404 t
= random32() % (imx
- imn
) + imn
;
2407 pkt_dev
->cur_daddr
= s
;
2409 t
= ntohl(pkt_dev
->cur_daddr
);
2414 pkt_dev
->cur_daddr
= htonl(t
);
2417 if (pkt_dev
->cflows
) {
2418 pkt_dev
->flows
[flow
].flags
|= F_INIT
;
2419 pkt_dev
->flows
[flow
].cur_daddr
=
2422 if (pkt_dev
->flags
& F_IPSEC_ON
)
2423 get_ipsec_sa(pkt_dev
, flow
);
2428 } else { /* IPV6 * */
2430 if (pkt_dev
->min_in6_daddr
.s6_addr32
[0] == 0 &&
2431 pkt_dev
->min_in6_daddr
.s6_addr32
[1] == 0 &&
2432 pkt_dev
->min_in6_daddr
.s6_addr32
[2] == 0 &&
2433 pkt_dev
->min_in6_daddr
.s6_addr32
[3] == 0) ;
2437 /* Only random destinations yet */
2439 for (i
= 0; i
< 4; i
++) {
2440 pkt_dev
->cur_in6_daddr
.s6_addr32
[i
] =
2441 (((__force __be32
)random32() |
2442 pkt_dev
->min_in6_daddr
.s6_addr32
[i
]) &
2443 pkt_dev
->max_in6_daddr
.s6_addr32
[i
]);
2448 if (pkt_dev
->min_pkt_size
< pkt_dev
->max_pkt_size
) {
2450 if (pkt_dev
->flags
& F_TXSIZE_RND
) {
2452 (pkt_dev
->max_pkt_size
- pkt_dev
->min_pkt_size
)
2453 + pkt_dev
->min_pkt_size
;
2455 t
= pkt_dev
->cur_pkt_size
+ 1;
2456 if (t
> pkt_dev
->max_pkt_size
)
2457 t
= pkt_dev
->min_pkt_size
;
2459 pkt_dev
->cur_pkt_size
= t
;
2462 set_cur_queue_map(pkt_dev
);
2464 pkt_dev
->flows
[flow
].count
++;
2469 static int pktgen_output_ipsec(struct sk_buff
*skb
, struct pktgen_dev
*pkt_dev
)
2471 struct xfrm_state
*x
= pkt_dev
->flows
[pkt_dev
->curfl
].x
;
2476 /* XXX: we dont support tunnel mode for now until
2477 * we resolve the dst issue */
2478 if (x
->props
.mode
!= XFRM_MODE_TRANSPORT
)
2481 spin_lock(&x
->lock
);
2483 err
= x
->outer_mode
->output(x
, skb
);
2486 err
= x
->type
->output(x
, skb
);
2490 x
->curlft
.bytes
+= skb
->len
;
2491 x
->curlft
.packets
++;
2493 spin_unlock(&x
->lock
);
2497 static void free_SAs(struct pktgen_dev
*pkt_dev
)
2499 if (pkt_dev
->cflows
) {
2500 /* let go of the SAs if we have them */
2502 for (i
= 0; i
< pkt_dev
->cflows
; i
++) {
2503 struct xfrm_state
*x
= pkt_dev
->flows
[i
].x
;
2506 pkt_dev
->flows
[i
].x
= NULL
;
2512 static int process_ipsec(struct pktgen_dev
*pkt_dev
,
2513 struct sk_buff
*skb
, __be16 protocol
)
2515 if (pkt_dev
->flags
& F_IPSEC_ON
) {
2516 struct xfrm_state
*x
= pkt_dev
->flows
[pkt_dev
->curfl
].x
;
2521 nhead
= x
->props
.header_len
- skb_headroom(skb
);
2523 ret
= pskb_expand_head(skb
, nhead
, 0, GFP_ATOMIC
);
2525 pr_err("Error expanding ipsec packet %d\n",
2531 /* ipsec is not expecting ll header */
2532 skb_pull(skb
, ETH_HLEN
);
2533 ret
= pktgen_output_ipsec(skb
, pkt_dev
);
2535 pr_err("Error creating ipsec packet %d\n", ret
);
2539 eth
= (__u8
*) skb_push(skb
, ETH_HLEN
);
2540 memcpy(eth
, pkt_dev
->hh
, 12);
2541 *(u16
*) ð
[12] = protocol
;
2551 static void mpls_push(__be32
*mpls
, struct pktgen_dev
*pkt_dev
)
2554 for (i
= 0; i
< pkt_dev
->nr_labels
; i
++)
2555 *mpls
++ = pkt_dev
->labels
[i
] & ~MPLS_STACK_BOTTOM
;
2558 *mpls
|= MPLS_STACK_BOTTOM
;
2561 static inline __be16
build_tci(unsigned int id
, unsigned int cfi
,
2564 return htons(id
| (cfi
<< 12) | (prio
<< 13));
2567 static void pktgen_finalize_skb(struct pktgen_dev
*pkt_dev
, struct sk_buff
*skb
,
2570 struct timeval timestamp
;
2571 struct pktgen_hdr
*pgh
;
2573 pgh
= (struct pktgen_hdr
*)skb_put(skb
, sizeof(*pgh
));
2574 datalen
-= sizeof(*pgh
);
2576 if (pkt_dev
->nfrags
<= 0) {
2577 memset(skb_put(skb
, datalen
), 0, datalen
);
2579 int frags
= pkt_dev
->nfrags
;
2584 if (frags
> MAX_SKB_FRAGS
)
2585 frags
= MAX_SKB_FRAGS
;
2586 len
= datalen
- frags
* PAGE_SIZE
;
2588 memset(skb_put(skb
, len
), 0, len
);
2589 datalen
= frags
* PAGE_SIZE
;
2593 frag_len
= (datalen
/frags
) < PAGE_SIZE
?
2594 (datalen
/frags
) : PAGE_SIZE
;
2595 while (datalen
> 0) {
2596 if (unlikely(!pkt_dev
->page
)) {
2597 int node
= numa_node_id();
2599 if (pkt_dev
->node
>= 0 && (pkt_dev
->flags
& F_NODE
))
2600 node
= pkt_dev
->node
;
2601 pkt_dev
->page
= alloc_pages_node(node
, GFP_KERNEL
| __GFP_ZERO
, 0);
2605 get_page(pkt_dev
->page
);
2606 skb_frag_set_page(skb
, i
, pkt_dev
->page
);
2607 skb_shinfo(skb
)->frags
[i
].page_offset
= 0;
2608 /*last fragment, fill rest of data*/
2609 if (i
== (frags
- 1))
2610 skb_frag_size_set(&skb_shinfo(skb
)->frags
[i
],
2611 (datalen
< PAGE_SIZE
? datalen
: PAGE_SIZE
));
2613 skb_frag_size_set(&skb_shinfo(skb
)->frags
[i
], frag_len
);
2614 datalen
-= skb_frag_size(&skb_shinfo(skb
)->frags
[i
]);
2615 skb
->len
+= skb_frag_size(&skb_shinfo(skb
)->frags
[i
]);
2616 skb
->data_len
+= skb_frag_size(&skb_shinfo(skb
)->frags
[i
]);
2618 skb_shinfo(skb
)->nr_frags
= i
;
2622 /* Stamp the time, and sequence number,
2623 * convert them to network byte order
2625 pgh
->pgh_magic
= htonl(PKTGEN_MAGIC
);
2626 pgh
->seq_num
= htonl(pkt_dev
->seq_num
);
2628 do_gettimeofday(×tamp
);
2629 pgh
->tv_sec
= htonl(timestamp
.tv_sec
);
2630 pgh
->tv_usec
= htonl(timestamp
.tv_usec
);
2633 static struct sk_buff
*fill_packet_ipv4(struct net_device
*odev
,
2634 struct pktgen_dev
*pkt_dev
)
2636 struct sk_buff
*skb
= NULL
;
2638 struct udphdr
*udph
;
2641 __be16 protocol
= htons(ETH_P_IP
);
2643 __be16
*vlan_tci
= NULL
; /* Encapsulates priority and VLAN ID */
2644 __be16
*vlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for VLAN tag */
2645 __be16
*svlan_tci
= NULL
; /* Encapsulates priority and SVLAN ID */
2646 __be16
*svlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for SVLAN tag */
2649 if (pkt_dev
->nr_labels
)
2650 protocol
= htons(ETH_P_MPLS_UC
);
2652 if (pkt_dev
->vlan_id
!= 0xffff)
2653 protocol
= htons(ETH_P_8021Q
);
2655 /* Update any of the values, used when we're incrementing various
2658 mod_cur_headers(pkt_dev
);
2659 queue_map
= pkt_dev
->cur_queue_map
;
2661 datalen
= (odev
->hard_header_len
+ 16) & ~0xf;
2663 if (pkt_dev
->flags
& F_NODE
) {
2666 if (pkt_dev
->node
>= 0)
2667 node
= pkt_dev
->node
;
2669 node
= numa_node_id();
2671 skb
= __alloc_skb(NET_SKB_PAD
+ pkt_dev
->cur_pkt_size
+ 64
2672 + datalen
+ pkt_dev
->pkt_overhead
, GFP_NOWAIT
, 0, node
);
2674 skb_reserve(skb
, NET_SKB_PAD
);
2679 skb
= __netdev_alloc_skb(odev
,
2680 pkt_dev
->cur_pkt_size
+ 64
2681 + datalen
+ pkt_dev
->pkt_overhead
, GFP_NOWAIT
);
2684 sprintf(pkt_dev
->result
, "No memory");
2687 prefetchw(skb
->data
);
2689 skb_reserve(skb
, datalen
);
2691 /* Reserve for ethernet and IP header */
2692 eth
= (__u8
*) skb_push(skb
, 14);
2693 mpls
= (__be32
*)skb_put(skb
, pkt_dev
->nr_labels
*sizeof(__u32
));
2694 if (pkt_dev
->nr_labels
)
2695 mpls_push(mpls
, pkt_dev
);
2697 if (pkt_dev
->vlan_id
!= 0xffff) {
2698 if (pkt_dev
->svlan_id
!= 0xffff) {
2699 svlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2700 *svlan_tci
= build_tci(pkt_dev
->svlan_id
,
2703 svlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2704 *svlan_encapsulated_proto
= htons(ETH_P_8021Q
);
2706 vlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2707 *vlan_tci
= build_tci(pkt_dev
->vlan_id
,
2710 vlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2711 *vlan_encapsulated_proto
= htons(ETH_P_IP
);
2714 skb
->network_header
= skb
->tail
;
2715 skb
->transport_header
= skb
->network_header
+ sizeof(struct iphdr
);
2716 skb_put(skb
, sizeof(struct iphdr
) + sizeof(struct udphdr
));
2717 skb_set_queue_mapping(skb
, queue_map
);
2718 skb
->priority
= pkt_dev
->skb_priority
;
2721 udph
= udp_hdr(skb
);
2723 memcpy(eth
, pkt_dev
->hh
, 12);
2724 *(__be16
*) & eth
[12] = protocol
;
2726 /* Eth + IPh + UDPh + mpls */
2727 datalen
= pkt_dev
->cur_pkt_size
- 14 - 20 - 8 -
2728 pkt_dev
->pkt_overhead
;
2729 if (datalen
< sizeof(struct pktgen_hdr
))
2730 datalen
= sizeof(struct pktgen_hdr
);
2732 udph
->source
= htons(pkt_dev
->cur_udp_src
);
2733 udph
->dest
= htons(pkt_dev
->cur_udp_dst
);
2734 udph
->len
= htons(datalen
+ 8); /* DATA + udphdr */
2735 udph
->check
= 0; /* No checksum */
2740 iph
->tos
= pkt_dev
->tos
;
2741 iph
->protocol
= IPPROTO_UDP
; /* UDP */
2742 iph
->saddr
= pkt_dev
->cur_saddr
;
2743 iph
->daddr
= pkt_dev
->cur_daddr
;
2744 iph
->id
= htons(pkt_dev
->ip_id
);
2747 iplen
= 20 + 8 + datalen
;
2748 iph
->tot_len
= htons(iplen
);
2750 iph
->check
= ip_fast_csum((void *)iph
, iph
->ihl
);
2751 skb
->protocol
= protocol
;
2752 skb
->mac_header
= (skb
->network_header
- ETH_HLEN
-
2753 pkt_dev
->pkt_overhead
);
2755 skb
->pkt_type
= PACKET_HOST
;
2756 pktgen_finalize_skb(pkt_dev
, skb
, datalen
);
2759 if (!process_ipsec(pkt_dev
, skb
, protocol
))
2767 * scan_ip6, fmt_ip taken from dietlibc-0.21
2768 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2770 * Slightly modified for kernel.
2771 * Should be candidate for net/ipv4/utils.c
2775 static unsigned int scan_ip6(const char *s
, char ip
[16])
2778 unsigned int len
= 0;
2781 unsigned int prefixlen
= 0;
2782 unsigned int suffixlen
= 0;
2786 for (i
= 0; i
< 16; i
++)
2792 if (s
[1] == ':') { /* Found "::", skip to part 2 */
2800 u
= simple_strtoul(s
, &pos
, 16);
2804 if (prefixlen
== 12 && s
[i
] == '.') {
2806 /* the last 4 bytes may be written as IPv4 address */
2809 memcpy((struct in_addr
*)(ip
+ 12), &tmp
, sizeof(tmp
));
2812 ip
[prefixlen
++] = (u
>> 8);
2813 ip
[prefixlen
++] = (u
& 255);
2816 if (prefixlen
== 16)
2820 /* part 2, after "::" */
2827 } else if (suffixlen
!= 0)
2830 u
= simple_strtol(s
, &pos
, 16);
2837 if (suffixlen
+ prefixlen
<= 12 && s
[i
] == '.') {
2839 memcpy((struct in_addr
*)(suffix
+ suffixlen
), &tmp
,
2845 suffix
[suffixlen
++] = (u
>> 8);
2846 suffix
[suffixlen
++] = (u
& 255);
2849 if (prefixlen
+ suffixlen
== 16)
2852 for (i
= 0; i
< suffixlen
; i
++)
2853 ip
[16 - suffixlen
+ i
] = suffix
[i
];
2857 static struct sk_buff
*fill_packet_ipv6(struct net_device
*odev
,
2858 struct pktgen_dev
*pkt_dev
)
2860 struct sk_buff
*skb
= NULL
;
2862 struct udphdr
*udph
;
2864 struct ipv6hdr
*iph
;
2865 __be16 protocol
= htons(ETH_P_IPV6
);
2867 __be16
*vlan_tci
= NULL
; /* Encapsulates priority and VLAN ID */
2868 __be16
*vlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for VLAN tag */
2869 __be16
*svlan_tci
= NULL
; /* Encapsulates priority and SVLAN ID */
2870 __be16
*svlan_encapsulated_proto
= NULL
; /* packet type ID field (or len) for SVLAN tag */
2873 if (pkt_dev
->nr_labels
)
2874 protocol
= htons(ETH_P_MPLS_UC
);
2876 if (pkt_dev
->vlan_id
!= 0xffff)
2877 protocol
= htons(ETH_P_8021Q
);
2879 /* Update any of the values, used when we're incrementing various
2882 mod_cur_headers(pkt_dev
);
2883 queue_map
= pkt_dev
->cur_queue_map
;
2885 skb
= __netdev_alloc_skb(odev
,
2886 pkt_dev
->cur_pkt_size
+ 64
2887 + 16 + pkt_dev
->pkt_overhead
, GFP_NOWAIT
);
2889 sprintf(pkt_dev
->result
, "No memory");
2892 prefetchw(skb
->data
);
2894 skb_reserve(skb
, 16);
2896 /* Reserve for ethernet and IP header */
2897 eth
= (__u8
*) skb_push(skb
, 14);
2898 mpls
= (__be32
*)skb_put(skb
, pkt_dev
->nr_labels
*sizeof(__u32
));
2899 if (pkt_dev
->nr_labels
)
2900 mpls_push(mpls
, pkt_dev
);
2902 if (pkt_dev
->vlan_id
!= 0xffff) {
2903 if (pkt_dev
->svlan_id
!= 0xffff) {
2904 svlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2905 *svlan_tci
= build_tci(pkt_dev
->svlan_id
,
2908 svlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2909 *svlan_encapsulated_proto
= htons(ETH_P_8021Q
);
2911 vlan_tci
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2912 *vlan_tci
= build_tci(pkt_dev
->vlan_id
,
2915 vlan_encapsulated_proto
= (__be16
*)skb_put(skb
, sizeof(__be16
));
2916 *vlan_encapsulated_proto
= htons(ETH_P_IPV6
);
2919 skb
->network_header
= skb
->tail
;
2920 skb
->transport_header
= skb
->network_header
+ sizeof(struct ipv6hdr
);
2921 skb_put(skb
, sizeof(struct ipv6hdr
) + sizeof(struct udphdr
));
2922 skb_set_queue_mapping(skb
, queue_map
);
2923 skb
->priority
= pkt_dev
->skb_priority
;
2924 iph
= ipv6_hdr(skb
);
2925 udph
= udp_hdr(skb
);
2927 memcpy(eth
, pkt_dev
->hh
, 12);
2928 *(__be16
*) ð
[12] = protocol
;
2930 /* Eth + IPh + UDPh + mpls */
2931 datalen
= pkt_dev
->cur_pkt_size
- 14 -
2932 sizeof(struct ipv6hdr
) - sizeof(struct udphdr
) -
2933 pkt_dev
->pkt_overhead
;
2935 if (datalen
< sizeof(struct pktgen_hdr
)) {
2936 datalen
= sizeof(struct pktgen_hdr
);
2937 if (net_ratelimit())
2938 pr_info("increased datalen to %d\n", datalen
);
2941 udph
->source
= htons(pkt_dev
->cur_udp_src
);
2942 udph
->dest
= htons(pkt_dev
->cur_udp_dst
);
2943 udph
->len
= htons(datalen
+ sizeof(struct udphdr
));
2944 udph
->check
= 0; /* No checksum */
2946 *(__be32
*) iph
= htonl(0x60000000); /* Version + flow */
2948 if (pkt_dev
->traffic_class
) {
2949 /* Version + traffic class + flow (0) */
2950 *(__be32
*)iph
|= htonl(0x60000000 | (pkt_dev
->traffic_class
<< 20));
2953 iph
->hop_limit
= 32;
2955 iph
->payload_len
= htons(sizeof(struct udphdr
) + datalen
);
2956 iph
->nexthdr
= IPPROTO_UDP
;
2958 ipv6_addr_copy(&iph
->daddr
, &pkt_dev
->cur_in6_daddr
);
2959 ipv6_addr_copy(&iph
->saddr
, &pkt_dev
->cur_in6_saddr
);
2961 skb
->mac_header
= (skb
->network_header
- ETH_HLEN
-
2962 pkt_dev
->pkt_overhead
);
2963 skb
->protocol
= protocol
;
2965 skb
->pkt_type
= PACKET_HOST
;
2967 pktgen_finalize_skb(pkt_dev
, skb
, datalen
);
2972 static struct sk_buff
*fill_packet(struct net_device
*odev
,
2973 struct pktgen_dev
*pkt_dev
)
2975 if (pkt_dev
->flags
& F_IPV6
)
2976 return fill_packet_ipv6(odev
, pkt_dev
);
2978 return fill_packet_ipv4(odev
, pkt_dev
);
2981 static void pktgen_clear_counters(struct pktgen_dev
*pkt_dev
)
2983 pkt_dev
->seq_num
= 1;
2984 pkt_dev
->idle_acc
= 0;
2986 pkt_dev
->tx_bytes
= 0;
2987 pkt_dev
->errors
= 0;
2990 /* Set up structure for sending pkts, clear counters */
2992 static void pktgen_run(struct pktgen_thread
*t
)
2994 struct pktgen_dev
*pkt_dev
;
3000 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
3003 * setup odev and create initial packet.
3005 pktgen_setup_inject(pkt_dev
);
3007 if (pkt_dev
->odev
) {
3008 pktgen_clear_counters(pkt_dev
);
3009 pkt_dev
->running
= 1; /* Cranke yeself! */
3010 pkt_dev
->skb
= NULL
;
3011 pkt_dev
->started_at
=
3012 pkt_dev
->next_tx
= ktime_now();
3014 set_pkt_overhead(pkt_dev
);
3016 strcpy(pkt_dev
->result
, "Starting");
3019 strcpy(pkt_dev
->result
, "Error starting");
3023 t
->control
&= ~(T_STOP
);
3026 static void pktgen_stop_all_threads_ifs(void)
3028 struct pktgen_thread
*t
;
3032 mutex_lock(&pktgen_thread_lock
);
3034 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3035 t
->control
|= T_STOP
;
3037 mutex_unlock(&pktgen_thread_lock
);
3040 static int thread_is_running(const struct pktgen_thread
*t
)
3042 const struct pktgen_dev
*pkt_dev
;
3044 list_for_each_entry(pkt_dev
, &t
->if_list
, list
)
3045 if (pkt_dev
->running
)
3050 static int pktgen_wait_thread_run(struct pktgen_thread
*t
)
3054 while (thread_is_running(t
)) {
3058 msleep_interruptible(100);
3060 if (signal_pending(current
))
3070 static int pktgen_wait_all_threads_run(void)
3072 struct pktgen_thread
*t
;
3075 mutex_lock(&pktgen_thread_lock
);
3077 list_for_each_entry(t
, &pktgen_threads
, th_list
) {
3078 sig
= pktgen_wait_thread_run(t
);
3084 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3085 t
->control
|= (T_STOP
);
3087 mutex_unlock(&pktgen_thread_lock
);
3091 static void pktgen_run_all_threads(void)
3093 struct pktgen_thread
*t
;
3097 mutex_lock(&pktgen_thread_lock
);
3099 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3100 t
->control
|= (T_RUN
);
3102 mutex_unlock(&pktgen_thread_lock
);
3104 /* Propagate thread->control */
3105 schedule_timeout_interruptible(msecs_to_jiffies(125));
3107 pktgen_wait_all_threads_run();
3110 static void pktgen_reset_all_threads(void)
3112 struct pktgen_thread
*t
;
3116 mutex_lock(&pktgen_thread_lock
);
3118 list_for_each_entry(t
, &pktgen_threads
, th_list
)
3119 t
->control
|= (T_REMDEVALL
);
3121 mutex_unlock(&pktgen_thread_lock
);
3123 /* Propagate thread->control */
3124 schedule_timeout_interruptible(msecs_to_jiffies(125));
3126 pktgen_wait_all_threads_run();
3129 static void show_results(struct pktgen_dev
*pkt_dev
, int nr_frags
)
3131 __u64 bps
, mbps
, pps
;
3132 char *p
= pkt_dev
->result
;
3133 ktime_t elapsed
= ktime_sub(pkt_dev
->stopped_at
,
3134 pkt_dev
->started_at
);
3135 ktime_t idle
= ns_to_ktime(pkt_dev
->idle_acc
);
3137 p
+= sprintf(p
, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3138 (unsigned long long)ktime_to_us(elapsed
),
3139 (unsigned long long)ktime_to_us(ktime_sub(elapsed
, idle
)),
3140 (unsigned long long)ktime_to_us(idle
),
3141 (unsigned long long)pkt_dev
->sofar
,
3142 pkt_dev
->cur_pkt_size
, nr_frags
);
3144 pps
= div64_u64(pkt_dev
->sofar
* NSEC_PER_SEC
,
3145 ktime_to_ns(elapsed
));
3147 bps
= pps
* 8 * pkt_dev
->cur_pkt_size
;
3150 do_div(mbps
, 1000000);
3151 p
+= sprintf(p
, " %llupps %lluMb/sec (%llubps) errors: %llu",
3152 (unsigned long long)pps
,
3153 (unsigned long long)mbps
,
3154 (unsigned long long)bps
,
3155 (unsigned long long)pkt_dev
->errors
);
3158 /* Set stopped-at timer, remove from running list, do counters & statistics */
3159 static int pktgen_stop_device(struct pktgen_dev
*pkt_dev
)
3161 int nr_frags
= pkt_dev
->skb
? skb_shinfo(pkt_dev
->skb
)->nr_frags
: -1;
3163 if (!pkt_dev
->running
) {
3164 pr_warning("interface: %s is already stopped\n",
3169 kfree_skb(pkt_dev
->skb
);
3170 pkt_dev
->skb
= NULL
;
3171 pkt_dev
->stopped_at
= ktime_now();
3172 pkt_dev
->running
= 0;
3174 show_results(pkt_dev
, nr_frags
);
3179 static struct pktgen_dev
*next_to_run(struct pktgen_thread
*t
)
3181 struct pktgen_dev
*pkt_dev
, *best
= NULL
;
3185 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
3186 if (!pkt_dev
->running
)
3190 else if (ktime_lt(pkt_dev
->next_tx
, best
->next_tx
))
3197 static void pktgen_stop(struct pktgen_thread
*t
)
3199 struct pktgen_dev
*pkt_dev
;
3205 list_for_each_entry(pkt_dev
, &t
->if_list
, list
) {
3206 pktgen_stop_device(pkt_dev
);
3213 * one of our devices needs to be removed - find it
3216 static void pktgen_rem_one_if(struct pktgen_thread
*t
)
3218 struct list_head
*q
, *n
;
3219 struct pktgen_dev
*cur
;
3225 list_for_each_safe(q
, n
, &t
->if_list
) {
3226 cur
= list_entry(q
, struct pktgen_dev
, list
);
3228 if (!cur
->removal_mark
)
3231 kfree_skb(cur
->skb
);
3234 pktgen_remove_device(t
, cur
);
3242 static void pktgen_rem_all_ifs(struct pktgen_thread
*t
)
3244 struct list_head
*q
, *n
;
3245 struct pktgen_dev
*cur
;
3249 /* Remove all devices, free mem */
3253 list_for_each_safe(q
, n
, &t
->if_list
) {
3254 cur
= list_entry(q
, struct pktgen_dev
, list
);
3256 kfree_skb(cur
->skb
);
3259 pktgen_remove_device(t
, cur
);
3265 static void pktgen_rem_thread(struct pktgen_thread
*t
)
3267 /* Remove from the thread list */
3269 remove_proc_entry(t
->tsk
->comm
, pg_proc_dir
);
3273 static void pktgen_resched(struct pktgen_dev
*pkt_dev
)
3275 ktime_t idle_start
= ktime_now();
3277 pkt_dev
->idle_acc
+= ktime_to_ns(ktime_sub(ktime_now(), idle_start
));
3280 static void pktgen_wait_for_skb(struct pktgen_dev
*pkt_dev
)
3282 ktime_t idle_start
= ktime_now();
3284 while (atomic_read(&(pkt_dev
->skb
->users
)) != 1) {
3285 if (signal_pending(current
))
3289 pktgen_resched(pkt_dev
);
3293 pkt_dev
->idle_acc
+= ktime_to_ns(ktime_sub(ktime_now(), idle_start
));
3296 static void pktgen_xmit(struct pktgen_dev
*pkt_dev
)
3298 struct net_device
*odev
= pkt_dev
->odev
;
3299 netdev_tx_t (*xmit
)(struct sk_buff
*, struct net_device
*)
3300 = odev
->netdev_ops
->ndo_start_xmit
;
3301 struct netdev_queue
*txq
;
3305 /* If device is offline, then don't send */
3306 if (unlikely(!netif_running(odev
) || !netif_carrier_ok(odev
))) {
3307 pktgen_stop_device(pkt_dev
);
3311 /* This is max DELAY, this has special meaning of
3314 if (unlikely(pkt_dev
->delay
== ULLONG_MAX
)) {
3315 pkt_dev
->next_tx
= ktime_add_ns(ktime_now(), ULONG_MAX
);
3319 /* If no skb or clone count exhausted then get new one */
3320 if (!pkt_dev
->skb
|| (pkt_dev
->last_ok
&&
3321 ++pkt_dev
->clone_count
>= pkt_dev
->clone_skb
)) {
3322 /* build a new pkt */
3323 kfree_skb(pkt_dev
->skb
);
3325 pkt_dev
->skb
= fill_packet(odev
, pkt_dev
);
3326 if (pkt_dev
->skb
== NULL
) {
3327 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3329 pkt_dev
->clone_count
--; /* back out increment, OOM */
3332 pkt_dev
->last_pkt_size
= pkt_dev
->skb
->len
;
3333 pkt_dev
->allocated_skbs
++;
3334 pkt_dev
->clone_count
= 0; /* reset counter */
3337 if (pkt_dev
->delay
&& pkt_dev
->last_ok
)
3338 spin(pkt_dev
, pkt_dev
->next_tx
);
3340 queue_map
= skb_get_queue_mapping(pkt_dev
->skb
);
3341 txq
= netdev_get_tx_queue(odev
, queue_map
);
3343 __netif_tx_lock_bh(txq
);
3345 if (unlikely(netif_tx_queue_frozen_or_stopped(txq
))) {
3346 ret
= NETDEV_TX_BUSY
;
3347 pkt_dev
->last_ok
= 0;
3350 atomic_inc(&(pkt_dev
->skb
->users
));
3351 ret
= (*xmit
)(pkt_dev
->skb
, odev
);
3355 txq_trans_update(txq
);
3356 pkt_dev
->last_ok
= 1;
3359 pkt_dev
->tx_bytes
+= pkt_dev
->last_pkt_size
;
3363 case NET_XMIT_POLICED
:
3364 /* skb has been consumed */
3367 default: /* Drivers are not supposed to return other values! */
3368 if (net_ratelimit())
3369 pr_info("%s xmit error: %d\n", pkt_dev
->odevname
, ret
);
3372 case NETDEV_TX_LOCKED
:
3373 case NETDEV_TX_BUSY
:
3374 /* Retry it next time */
3375 atomic_dec(&(pkt_dev
->skb
->users
));
3376 pkt_dev
->last_ok
= 0;
3379 __netif_tx_unlock_bh(txq
);
3381 /* If pkt_dev->count is zero, then run forever */
3382 if ((pkt_dev
->count
!= 0) && (pkt_dev
->sofar
>= pkt_dev
->count
)) {
3383 pktgen_wait_for_skb(pkt_dev
);
3385 /* Done with this */
3386 pktgen_stop_device(pkt_dev
);
3391 * Main loop of the thread goes here
3394 static int pktgen_thread_worker(void *arg
)
3397 struct pktgen_thread
*t
= arg
;
3398 struct pktgen_dev
*pkt_dev
= NULL
;
3401 BUG_ON(smp_processor_id() != cpu
);
3403 init_waitqueue_head(&t
->queue
);
3404 complete(&t
->start_done
);
3406 pr_debug("starting pktgen/%d: pid=%d\n", cpu
, task_pid_nr(current
));
3408 set_current_state(TASK_INTERRUPTIBLE
);
3412 while (!kthread_should_stop()) {
3413 pkt_dev
= next_to_run(t
);
3415 if (unlikely(!pkt_dev
&& t
->control
== 0)) {
3418 wait_event_interruptible_timeout(t
->queue
,
3425 __set_current_state(TASK_RUNNING
);
3427 if (likely(pkt_dev
)) {
3428 pktgen_xmit(pkt_dev
);
3431 pktgen_resched(pkt_dev
);
3436 if (t
->control
& T_STOP
) {
3438 t
->control
&= ~(T_STOP
);
3441 if (t
->control
& T_RUN
) {
3443 t
->control
&= ~(T_RUN
);
3446 if (t
->control
& T_REMDEVALL
) {
3447 pktgen_rem_all_ifs(t
);
3448 t
->control
&= ~(T_REMDEVALL
);
3451 if (t
->control
& T_REMDEV
) {
3452 pktgen_rem_one_if(t
);
3453 t
->control
&= ~(T_REMDEV
);
3458 set_current_state(TASK_INTERRUPTIBLE
);
3461 pr_debug("%s stopping all device\n", t
->tsk
->comm
);
3464 pr_debug("%s removing all device\n", t
->tsk
->comm
);
3465 pktgen_rem_all_ifs(t
);
3467 pr_debug("%s removing thread\n", t
->tsk
->comm
);
3468 pktgen_rem_thread(t
);
3470 /* Wait for kthread_stop */
3471 while (!kthread_should_stop()) {
3472 set_current_state(TASK_INTERRUPTIBLE
);
3475 __set_current_state(TASK_RUNNING
);
3480 static struct pktgen_dev
*pktgen_find_dev(struct pktgen_thread
*t
,
3481 const char *ifname
, bool exact
)
3483 struct pktgen_dev
*p
, *pkt_dev
= NULL
;
3484 size_t len
= strlen(ifname
);
3487 list_for_each_entry(p
, &t
->if_list
, list
)
3488 if (strncmp(p
->odevname
, ifname
, len
) == 0) {
3489 if (p
->odevname
[len
]) {
3490 if (exact
|| p
->odevname
[len
] != '@')
3498 pr_debug("find_dev(%s) returning %p\n", ifname
, pkt_dev
);
3503 * Adds a dev at front of if_list.
3506 static int add_dev_to_thread(struct pktgen_thread
*t
,
3507 struct pktgen_dev
*pkt_dev
)
3513 if (pkt_dev
->pg_thread
) {
3514 pr_err("ERROR: already assigned to a thread\n");
3519 list_add(&pkt_dev
->list
, &t
->if_list
);
3520 pkt_dev
->pg_thread
= t
;
3521 pkt_dev
->running
= 0;
3528 /* Called under thread lock */
3530 static int pktgen_add_device(struct pktgen_thread
*t
, const char *ifname
)
3532 struct pktgen_dev
*pkt_dev
;
3534 int node
= cpu_to_node(t
->cpu
);
3536 /* We don't allow a device to be on several threads */
3538 pkt_dev
= __pktgen_NN_threads(ifname
, FIND
);
3540 pr_err("ERROR: interface already used\n");
3544 pkt_dev
= kzalloc_node(sizeof(struct pktgen_dev
), GFP_KERNEL
, node
);
3548 strcpy(pkt_dev
->odevname
, ifname
);
3549 pkt_dev
->flows
= vzalloc_node(MAX_CFLOWS
* sizeof(struct flow_state
),
3551 if (pkt_dev
->flows
== NULL
) {
3556 pkt_dev
->removal_mark
= 0;
3557 pkt_dev
->min_pkt_size
= ETH_ZLEN
;
3558 pkt_dev
->max_pkt_size
= ETH_ZLEN
;
3559 pkt_dev
->nfrags
= 0;
3560 pkt_dev
->delay
= pg_delay_d
;
3561 pkt_dev
->count
= pg_count_d
;
3563 pkt_dev
->udp_src_min
= 9; /* sink port */
3564 pkt_dev
->udp_src_max
= 9;
3565 pkt_dev
->udp_dst_min
= 9;
3566 pkt_dev
->udp_dst_max
= 9;
3567 pkt_dev
->vlan_p
= 0;
3568 pkt_dev
->vlan_cfi
= 0;
3569 pkt_dev
->vlan_id
= 0xffff;
3570 pkt_dev
->svlan_p
= 0;
3571 pkt_dev
->svlan_cfi
= 0;
3572 pkt_dev
->svlan_id
= 0xffff;
3575 err
= pktgen_setup_dev(pkt_dev
, ifname
);
3578 if (pkt_dev
->odev
->priv_flags
& IFF_TX_SKB_SHARING
)
3579 pkt_dev
->clone_skb
= pg_clone_skb_d
;
3581 pkt_dev
->entry
= proc_create_data(ifname
, 0600, pg_proc_dir
,
3582 &pktgen_if_fops
, pkt_dev
);
3583 if (!pkt_dev
->entry
) {
3584 pr_err("cannot create %s/%s procfs entry\n",
3585 PG_PROC_DIR
, ifname
);
3590 pkt_dev
->ipsmode
= XFRM_MODE_TRANSPORT
;
3591 pkt_dev
->ipsproto
= IPPROTO_ESP
;
3594 return add_dev_to_thread(t
, pkt_dev
);
3596 dev_put(pkt_dev
->odev
);
3601 vfree(pkt_dev
->flows
);
3606 static int __init
pktgen_create_thread(int cpu
)
3608 struct pktgen_thread
*t
;
3609 struct proc_dir_entry
*pe
;
3610 struct task_struct
*p
;
3612 t
= kzalloc_node(sizeof(struct pktgen_thread
), GFP_KERNEL
,
3615 pr_err("ERROR: out of memory, can't create new thread\n");
3619 spin_lock_init(&t
->if_lock
);
3622 INIT_LIST_HEAD(&t
->if_list
);
3624 list_add_tail(&t
->th_list
, &pktgen_threads
);
3625 init_completion(&t
->start_done
);
3627 p
= kthread_create_on_node(pktgen_thread_worker
,
3630 "kpktgend_%d", cpu
);
3632 pr_err("kernel_thread() failed for cpu %d\n", t
->cpu
);
3633 list_del(&t
->th_list
);
3637 kthread_bind(p
, cpu
);
3640 pe
= proc_create_data(t
->tsk
->comm
, 0600, pg_proc_dir
,
3641 &pktgen_thread_fops
, t
);
3643 pr_err("cannot create %s/%s procfs entry\n",
3644 PG_PROC_DIR
, t
->tsk
->comm
);
3646 list_del(&t
->th_list
);
3652 wait_for_completion(&t
->start_done
);
3658 * Removes a device from the thread if_list.
3660 static void _rem_dev_from_if_list(struct pktgen_thread
*t
,
3661 struct pktgen_dev
*pkt_dev
)
3663 struct list_head
*q
, *n
;
3664 struct pktgen_dev
*p
;
3666 list_for_each_safe(q
, n
, &t
->if_list
) {
3667 p
= list_entry(q
, struct pktgen_dev
, list
);
3673 static int pktgen_remove_device(struct pktgen_thread
*t
,
3674 struct pktgen_dev
*pkt_dev
)
3677 pr_debug("remove_device pkt_dev=%p\n", pkt_dev
);
3679 if (pkt_dev
->running
) {
3680 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3681 pktgen_stop_device(pkt_dev
);
3684 /* Dis-associate from the interface */
3686 if (pkt_dev
->odev
) {
3687 dev_put(pkt_dev
->odev
);
3688 pkt_dev
->odev
= NULL
;
3691 /* And update the thread if_list */
3693 _rem_dev_from_if_list(t
, pkt_dev
);
3696 remove_proc_entry(pkt_dev
->entry
->name
, pg_proc_dir
);
3701 vfree(pkt_dev
->flows
);
3703 put_page(pkt_dev
->page
);
3708 static int __init
pg_init(void)
3711 struct proc_dir_entry
*pe
;
3714 pr_info("%s", version
);
3716 pg_proc_dir
= proc_mkdir(PG_PROC_DIR
, init_net
.proc_net
);
3720 pe
= proc_create(PGCTRL
, 0600, pg_proc_dir
, &pktgen_fops
);
3722 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL
);
3727 register_netdevice_notifier(&pktgen_notifier_block
);
3729 for_each_online_cpu(cpu
) {
3732 err
= pktgen_create_thread(cpu
);
3734 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3738 if (list_empty(&pktgen_threads
)) {
3739 pr_err("ERROR: Initialization failed for all threads\n");
3747 unregister_netdevice_notifier(&pktgen_notifier_block
);
3748 remove_proc_entry(PGCTRL
, pg_proc_dir
);
3750 proc_net_remove(&init_net
, PG_PROC_DIR
);
3754 static void __exit
pg_cleanup(void)
3756 struct pktgen_thread
*t
;
3757 struct list_head
*q
, *n
;
3759 /* Stop all interfaces & threads */
3760 pktgen_exiting
= true;
3762 list_for_each_safe(q
, n
, &pktgen_threads
) {
3763 t
= list_entry(q
, struct pktgen_thread
, th_list
);
3764 kthread_stop(t
->tsk
);
3768 /* Un-register us from receiving netdevice events */
3769 unregister_netdevice_notifier(&pktgen_notifier_block
);
3771 /* Clean up proc file system */
3772 remove_proc_entry(PGCTRL
, pg_proc_dir
);
3773 proc_net_remove(&init_net
, PG_PROC_DIR
);
3776 module_init(pg_init
);
3777 module_exit(pg_cleanup
);
3779 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3780 MODULE_DESCRIPTION("Packet Generator tool");
3781 MODULE_LICENSE("GPL");
3782 MODULE_VERSION(VERSION
);
3783 module_param(pg_count_d
, int, 0);
3784 MODULE_PARM_DESC(pg_count_d
, "Default number of packets to inject");
3785 module_param(pg_delay_d
, int, 0);
3786 MODULE_PARM_DESC(pg_delay_d
, "Default delay between packets (nanoseconds)");
3787 module_param(pg_clone_skb_d
, int, 0);
3788 MODULE_PARM_DESC(pg_clone_skb_d
, "Default number of copies of the same packet");
3789 module_param(debug
, int, 0);
3790 MODULE_PARM_DESC(debug
, "Enable debugging of pktgen module");