4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
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:
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
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.
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.
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.
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
99 * Randy Dunlap fixed u64 printk compiler waring
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
114 * Fixed src_mac command to set source mac of packet to value specified in
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/hrtimer.h>
135 #include <linux/freezer.h>
136 #include <linux/delay.h>
137 #include <linux/timer.h>
138 #include <linux/list.h>
139 #include <linux/init.h>
140 #include <linux/skbuff.h>
141 #include <linux/netdevice.h>
142 #include <linux/inet.h>
143 #include <linux/inetdevice.h>
144 #include <linux/rtnetlink.h>
145 #include <linux/if_arp.h>
146 #include <linux/if_vlan.h>
147 #include <linux/in.h>
148 #include <linux/ip.h>
149 #include <linux/ipv6.h>
150 #include <linux/udp.h>
151 #include <linux/proc_fs.h>
152 #include <linux/seq_file.h>
153 #include <linux/wait.h>
154 #include <linux/etherdevice.h>
155 #include <linux/kthread.h>
156 #include <net/net_namespace.h>
157 #include <net/checksum.h>
158 #include <net/ipv6.h>
159 #include <net/addrconf.h>
161 #include <net/xfrm.h>
163 #include <asm/byteorder.h>
164 #include <linux/rcupdate.h>
165 #include <linux/bitops.h>
166 #include <linux/io.h>
167 #include <linux/timex.h>
168 #include <linux/uaccess.h>
170 #include <asm/div64.h> /* do_div */
172 #define VERSION "2.72"
173 #define IP_NAME_SZ 32
174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
175 #define MPLS_STACK_BOTTOM htonl(0x00000100)
177 /* Device flag bits */
178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
187 #define F_VID_RND (1<<9) /* Random VLAN ID */
188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
194 /* Thread control flag bits */
195 #define T_STOP (1<<0) /* Stop run */
196 #define T_RUN (1<<1) /* Start run */
197 #define T_REMDEVALL (1<<2) /* Remove all devs */
198 #define T_REMDEV (1<<3) /* Remove one dev */
200 /* If lock -- can be removed after some work */
201 #define if_lock(t) spin_lock(&(t->if_lock));
202 #define if_unlock(t) spin_unlock(&(t->if_lock));
204 /* Used to help with determining the pkts on receive */
205 #define PKTGEN_MAGIC 0xbe9be955
206 #define PG_PROC_DIR "pktgen"
207 #define PGCTRL "pgctrl"
208 static struct proc_dir_entry *pg_proc_dir;
210 #define MAX_CFLOWS 65536
212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
219 struct xfrm_state *x;
225 #define F_INIT (1<<0) /* flow has been initialized */
229 * Try to keep frequent/infrequent used vars. separated.
231 struct proc_dir_entry *entry; /* proc file */
232 struct pktgen_thread *pg_thread;/* the owner */
233 struct list_head list; /* chaining in the thread's run-queue */
235 int running; /* if false, the test will stop */
237 /* If min != max, then we will either do a linear iteration, or
238 * we will do a random selection from within the range.
241 int removal_mark; /* non-zero => the device is marked for
242 * removal by worker thread */
244 int min_pkt_size; /* = ETH_ZLEN; */
245 int max_pkt_size; /* = ETH_ZLEN; */
246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
248 u64 delay; /* nano-seconds */
250 __u64 count; /* Default No packets to send */
251 __u64 sofar; /* How many pkts we've sent so far */
252 __u64 tx_bytes; /* How many bytes we've transmitted */
253 __u64 errors; /* Errors when trying to transmit,
254 pkts will be re-sent */
256 /* runtime counters relating to clone_skb */
258 __u64 allocated_skbs;
260 int last_ok; /* Was last skb sent?
261 * Or a failed transmit of some sort?
262 * This will keep sequence numbers in order
267 u64 idle_acc; /* nano-seconds */
272 * Use multiple SKBs during packet gen.
273 * If this number is greater than 1, then
274 * that many copies of the same packet will be
275 * sent before a new packet is allocated.
276 * If you want to send 1024 identical packets
277 * before creating a new packet,
278 * set clone_skb to 1024.
281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
286 struct in6_addr in6_saddr;
287 struct in6_addr in6_daddr;
288 struct in6_addr cur_in6_daddr;
289 struct in6_addr cur_in6_saddr;
291 struct in6_addr min_in6_daddr;
292 struct in6_addr max_in6_daddr;
293 struct in6_addr min_in6_saddr;
294 struct in6_addr max_in6_saddr;
296 /* If we're doing ranges, random or incremental, then this
297 * defines the min/max for those ranges.
299 __be32 saddr_min; /* inclusive, source IP address */
300 __be32 saddr_max; /* exclusive, source IP address */
301 __be32 daddr_min; /* inclusive, dest IP address */
302 __be32 daddr_max; /* exclusive, dest IP address */
304 __u16 udp_src_min; /* inclusive, source UDP port */
305 __u16 udp_src_max; /* exclusive, source UDP port */
306 __u16 udp_dst_min; /* inclusive, dest UDP port */
307 __u16 udp_dst_max; /* exclusive, dest UDP port */
310 __u8 tos; /* six MSB of (former) IPv4 TOS
311 are for dscp codepoint */
312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
313 (see RFC 3260, sec. 4) */
316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
317 __be32 labels[MAX_MPLS_LABELS];
319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
322 __u16 vlan_id; /* 0xffff means no vlan tag */
326 __u16 svlan_id; /* 0xffff means no svlan tag */
328 __u32 src_mac_count; /* How many MACs to iterate through */
329 __u32 dst_mac_count; /* How many MACs to iterate through */
331 unsigned char dst_mac[ETH_ALEN];
332 unsigned char src_mac[ETH_ALEN];
334 __u32 cur_dst_mac_offset;
335 __u32 cur_src_mac_offset;
347 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
349 We fill in SRC address later
350 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
354 __u16 pad; /* pad out the hh struct to an even 16 bytes */
356 struct sk_buff *skb; /* skb we are to transmit next, used for when we
357 * are transmitting the same one multiple times
359 struct net_device *odev; /* The out-going device.
360 * Note that the device should have it's
361 * pg_info pointer pointing back to this
363 * Set when the user specifies the out-going
364 * device name (not when the inject is
365 * started as it used to do.)
367 struct flow_state *flows;
368 unsigned cflows; /* Concurrent flows (config) */
369 unsigned lflow; /* Flow length (config) */
370 unsigned nflows; /* accumulated flows (stats) */
371 unsigned curfl; /* current sequenced flow (state)*/
377 __u8 ipsmode; /* IPSEC mode (config) */
378 __u8 ipsproto; /* IPSEC type (config) */
390 struct pktgen_thread {
391 spinlock_t if_lock; /* for list of devices */
392 struct list_head if_list; /* All device here */
393 struct list_head th_list;
394 struct task_struct *tsk;
397 /* Field for thread to receive "posted" events terminate,
403 wait_queue_head_t queue;
404 struct completion start_done;
410 static inline ktime_t ktime_now(void)
415 return timespec_to_ktime(ts);
418 /* This works even if 32 bit because of careful byte order choice */
419 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
421 return cmp1.tv64 < cmp2.tv64;
424 static const char version[] =
425 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
427 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
428 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
429 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
431 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
432 static void pktgen_run_all_threads(void);
433 static void pktgen_reset_all_threads(void);
434 static void pktgen_stop_all_threads_ifs(void);
436 static void pktgen_stop(struct pktgen_thread *t);
437 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
439 static unsigned int scan_ip6(const char *s, char ip[16]);
440 static unsigned int fmt_ip6(char *s, const char ip[16]);
442 /* Module parameters, defaults. */
443 static int pg_count_d __read_mostly = 1000;
444 static int pg_delay_d __read_mostly;
445 static int pg_clone_skb_d __read_mostly;
446 static int debug __read_mostly;
448 static DEFINE_MUTEX(pktgen_thread_lock);
449 static LIST_HEAD(pktgen_threads);
451 static struct notifier_block pktgen_notifier_block = {
452 .notifier_call = pktgen_device_event,
456 * /proc handling functions
460 static int pgctrl_show(struct seq_file *seq, void *v)
462 seq_puts(seq, version);
466 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
467 size_t count, loff_t *ppos)
472 if (!capable(CAP_NET_ADMIN)) {
477 if (count > sizeof(data))
478 count = sizeof(data);
480 if (copy_from_user(data, buf, count)) {
484 data[count - 1] = 0; /* Make string */
486 if (!strcmp(data, "stop"))
487 pktgen_stop_all_threads_ifs();
489 else if (!strcmp(data, "start"))
490 pktgen_run_all_threads();
492 else if (!strcmp(data, "reset"))
493 pktgen_reset_all_threads();
496 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
504 static int pgctrl_open(struct inode *inode, struct file *file)
506 return single_open(file, pgctrl_show, PDE(inode)->data);
509 static const struct file_operations pktgen_fops = {
510 .owner = THIS_MODULE,
514 .write = pgctrl_write,
515 .release = single_release,
518 static int pktgen_if_show(struct seq_file *seq, void *v)
520 const struct pktgen_dev *pkt_dev = seq->private;
525 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
526 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
527 pkt_dev->max_pkt_size);
530 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
531 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
532 pkt_dev->clone_skb, pkt_dev->odev->name);
534 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
538 " queue_map_min: %u queue_map_max: %u\n",
539 pkt_dev->queue_map_min,
540 pkt_dev->queue_map_max);
542 if (pkt_dev->flags & F_IPV6) {
543 char b1[128], b2[128], b3[128];
544 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
545 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
546 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
548 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
551 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
552 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
553 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
555 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
560 " dst_min: %s dst_max: %s\n",
561 pkt_dev->dst_min, pkt_dev->dst_max);
563 " src_min: %s src_max: %s\n",
564 pkt_dev->src_min, pkt_dev->src_max);
567 seq_puts(seq, " src_mac: ");
569 seq_printf(seq, "%pM ",
570 is_zero_ether_addr(pkt_dev->src_mac) ?
571 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
573 seq_printf(seq, "dst_mac: ");
574 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
577 " udp_src_min: %d udp_src_max: %d"
578 " udp_dst_min: %d udp_dst_max: %d\n",
579 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
580 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
583 " src_mac_count: %d dst_mac_count: %d\n",
584 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
586 if (pkt_dev->nr_labels) {
588 seq_printf(seq, " mpls: ");
589 for (i = 0; i < pkt_dev->nr_labels; i++)
590 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
591 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
594 if (pkt_dev->vlan_id != 0xffff)
595 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
596 pkt_dev->vlan_id, pkt_dev->vlan_p,
599 if (pkt_dev->svlan_id != 0xffff)
600 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
601 pkt_dev->svlan_id, pkt_dev->svlan_p,
605 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
607 if (pkt_dev->traffic_class)
608 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
610 seq_printf(seq, " Flags: ");
612 if (pkt_dev->flags & F_IPV6)
613 seq_printf(seq, "IPV6 ");
615 if (pkt_dev->flags & F_IPSRC_RND)
616 seq_printf(seq, "IPSRC_RND ");
618 if (pkt_dev->flags & F_IPDST_RND)
619 seq_printf(seq, "IPDST_RND ");
621 if (pkt_dev->flags & F_TXSIZE_RND)
622 seq_printf(seq, "TXSIZE_RND ");
624 if (pkt_dev->flags & F_UDPSRC_RND)
625 seq_printf(seq, "UDPSRC_RND ");
627 if (pkt_dev->flags & F_UDPDST_RND)
628 seq_printf(seq, "UDPDST_RND ");
630 if (pkt_dev->flags & F_MPLS_RND)
631 seq_printf(seq, "MPLS_RND ");
633 if (pkt_dev->flags & F_QUEUE_MAP_RND)
634 seq_printf(seq, "QUEUE_MAP_RND ");
636 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
637 seq_printf(seq, "QUEUE_MAP_CPU ");
639 if (pkt_dev->cflows) {
640 if (pkt_dev->flags & F_FLOW_SEQ)
641 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
643 seq_printf(seq, "FLOW_RND ");
647 if (pkt_dev->flags & F_IPSEC_ON)
648 seq_printf(seq, "IPSEC ");
651 if (pkt_dev->flags & F_MACSRC_RND)
652 seq_printf(seq, "MACSRC_RND ");
654 if (pkt_dev->flags & F_MACDST_RND)
655 seq_printf(seq, "MACDST_RND ");
657 if (pkt_dev->flags & F_VID_RND)
658 seq_printf(seq, "VID_RND ");
660 if (pkt_dev->flags & F_SVID_RND)
661 seq_printf(seq, "SVID_RND ");
665 /* not really stopped, more like last-running-at */
666 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
667 idle = pkt_dev->idle_acc;
668 do_div(idle, NSEC_PER_USEC);
671 "Current:\n pkts-sofar: %llu errors: %llu\n",
672 (unsigned long long)pkt_dev->sofar,
673 (unsigned long long)pkt_dev->errors);
676 " started: %lluus stopped: %lluus idle: %lluus\n",
677 (unsigned long long) ktime_to_us(pkt_dev->started_at),
678 (unsigned long long) ktime_to_us(stopped),
679 (unsigned long long) idle);
682 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
683 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
684 pkt_dev->cur_src_mac_offset);
686 if (pkt_dev->flags & F_IPV6) {
687 char b1[128], b2[128];
688 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
689 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
690 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
692 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
693 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
695 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
696 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
698 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
700 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
702 if (pkt_dev->result[0])
703 seq_printf(seq, "Result: %s\n", pkt_dev->result);
705 seq_printf(seq, "Result: Idle\n");
711 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
717 for (; i < maxlen; i++) {
720 if (get_user(c, &user_buffer[i]))
722 if ((c >= '0') && (c <= '9'))
724 else if ((c >= 'a') && (c <= 'f'))
725 *num |= c - 'a' + 10;
726 else if ((c >= 'A') && (c <= 'F'))
727 *num |= c - 'A' + 10;
734 static int count_trail_chars(const char __user * user_buffer,
739 for (i = 0; i < maxlen; i++) {
741 if (get_user(c, &user_buffer[i]))
759 static unsigned long num_arg(const char __user * user_buffer,
760 unsigned long maxlen, unsigned long *num)
765 for (; i < maxlen; i++) {
767 if (get_user(c, &user_buffer[i]))
769 if ((c >= '0') && (c <= '9')) {
778 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
782 for (; i < maxlen; i++) {
784 if (get_user(c, &user_buffer[i]))
802 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
809 pkt_dev->nr_labels = 0;
812 len = hex32_arg(&buffer[i], 8, &tmp);
815 pkt_dev->labels[n] = htonl(tmp);
816 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
817 pkt_dev->flags |= F_MPLS_RND;
819 if (get_user(c, &buffer[i]))
823 if (n >= MAX_MPLS_LABELS)
827 pkt_dev->nr_labels = n;
831 static ssize_t pktgen_if_write(struct file *file,
832 const char __user * user_buffer, size_t count,
835 struct seq_file *seq = (struct seq_file *)file->private_data;
836 struct pktgen_dev *pkt_dev = seq->private;
838 char name[16], valstr[32];
839 unsigned long value = 0;
840 char *pg_result = NULL;
844 pg_result = &(pkt_dev->result[0]);
847 printk(KERN_WARNING "pktgen: wrong command format\n");
852 tmp = count_trail_chars(&user_buffer[i], max);
854 printk(KERN_WARNING "pktgen: illegal format\n");
859 /* Read variable name */
861 len = strn_len(&user_buffer[i], sizeof(name) - 1);
865 memset(name, 0, sizeof(name));
866 if (copy_from_user(name, &user_buffer[i], len))
871 len = count_trail_chars(&user_buffer[i], max);
879 if (copy_from_user(tb, user_buffer, count))
882 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
883 (unsigned long)count, tb);
886 if (!strcmp(name, "min_pkt_size")) {
887 len = num_arg(&user_buffer[i], 10, &value);
892 if (value < 14 + 20 + 8)
894 if (value != pkt_dev->min_pkt_size) {
895 pkt_dev->min_pkt_size = value;
896 pkt_dev->cur_pkt_size = value;
898 sprintf(pg_result, "OK: min_pkt_size=%u",
899 pkt_dev->min_pkt_size);
903 if (!strcmp(name, "max_pkt_size")) {
904 len = num_arg(&user_buffer[i], 10, &value);
909 if (value < 14 + 20 + 8)
911 if (value != pkt_dev->max_pkt_size) {
912 pkt_dev->max_pkt_size = value;
913 pkt_dev->cur_pkt_size = value;
915 sprintf(pg_result, "OK: max_pkt_size=%u",
916 pkt_dev->max_pkt_size);
920 /* Shortcut for min = max */
922 if (!strcmp(name, "pkt_size")) {
923 len = num_arg(&user_buffer[i], 10, &value);
928 if (value < 14 + 20 + 8)
930 if (value != pkt_dev->min_pkt_size) {
931 pkt_dev->min_pkt_size = value;
932 pkt_dev->max_pkt_size = value;
933 pkt_dev->cur_pkt_size = value;
935 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
939 if (!strcmp(name, "debug")) {
940 len = num_arg(&user_buffer[i], 10, &value);
946 sprintf(pg_result, "OK: debug=%u", debug);
950 if (!strcmp(name, "frags")) {
951 len = num_arg(&user_buffer[i], 10, &value);
956 pkt_dev->nfrags = value;
957 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
960 if (!strcmp(name, "delay")) {
961 len = num_arg(&user_buffer[i], 10, &value);
966 if (value == 0x7FFFFFFF)
967 pkt_dev->delay = ULLONG_MAX;
969 pkt_dev->delay = (u64)value;
971 sprintf(pg_result, "OK: delay=%llu",
972 (unsigned long long) pkt_dev->delay);
975 if (!strcmp(name, "udp_src_min")) {
976 len = num_arg(&user_buffer[i], 10, &value);
981 if (value != pkt_dev->udp_src_min) {
982 pkt_dev->udp_src_min = value;
983 pkt_dev->cur_udp_src = value;
985 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
988 if (!strcmp(name, "udp_dst_min")) {
989 len = num_arg(&user_buffer[i], 10, &value);
994 if (value != pkt_dev->udp_dst_min) {
995 pkt_dev->udp_dst_min = value;
996 pkt_dev->cur_udp_dst = value;
998 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1001 if (!strcmp(name, "udp_src_max")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1007 if (value != pkt_dev->udp_src_max) {
1008 pkt_dev->udp_src_max = value;
1009 pkt_dev->cur_udp_src = value;
1011 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1014 if (!strcmp(name, "udp_dst_max")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1020 if (value != pkt_dev->udp_dst_max) {
1021 pkt_dev->udp_dst_max = value;
1022 pkt_dev->cur_udp_dst = value;
1024 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1027 if (!strcmp(name, "clone_skb")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1033 pkt_dev->clone_skb = value;
1035 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1038 if (!strcmp(name, "count")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1044 pkt_dev->count = value;
1045 sprintf(pg_result, "OK: count=%llu",
1046 (unsigned long long)pkt_dev->count);
1049 if (!strcmp(name, "src_mac_count")) {
1050 len = num_arg(&user_buffer[i], 10, &value);
1055 if (pkt_dev->src_mac_count != value) {
1056 pkt_dev->src_mac_count = value;
1057 pkt_dev->cur_src_mac_offset = 0;
1059 sprintf(pg_result, "OK: src_mac_count=%d",
1060 pkt_dev->src_mac_count);
1063 if (!strcmp(name, "dst_mac_count")) {
1064 len = num_arg(&user_buffer[i], 10, &value);
1069 if (pkt_dev->dst_mac_count != value) {
1070 pkt_dev->dst_mac_count = value;
1071 pkt_dev->cur_dst_mac_offset = 0;
1073 sprintf(pg_result, "OK: dst_mac_count=%d",
1074 pkt_dev->dst_mac_count);
1077 if (!strcmp(name, "flag")) {
1080 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1084 if (copy_from_user(f, &user_buffer[i], len))
1087 if (strcmp(f, "IPSRC_RND") == 0)
1088 pkt_dev->flags |= F_IPSRC_RND;
1090 else if (strcmp(f, "!IPSRC_RND") == 0)
1091 pkt_dev->flags &= ~F_IPSRC_RND;
1093 else if (strcmp(f, "TXSIZE_RND") == 0)
1094 pkt_dev->flags |= F_TXSIZE_RND;
1096 else if (strcmp(f, "!TXSIZE_RND") == 0)
1097 pkt_dev->flags &= ~F_TXSIZE_RND;
1099 else if (strcmp(f, "IPDST_RND") == 0)
1100 pkt_dev->flags |= F_IPDST_RND;
1102 else if (strcmp(f, "!IPDST_RND") == 0)
1103 pkt_dev->flags &= ~F_IPDST_RND;
1105 else if (strcmp(f, "UDPSRC_RND") == 0)
1106 pkt_dev->flags |= F_UDPSRC_RND;
1108 else if (strcmp(f, "!UDPSRC_RND") == 0)
1109 pkt_dev->flags &= ~F_UDPSRC_RND;
1111 else if (strcmp(f, "UDPDST_RND") == 0)
1112 pkt_dev->flags |= F_UDPDST_RND;
1114 else if (strcmp(f, "!UDPDST_RND") == 0)
1115 pkt_dev->flags &= ~F_UDPDST_RND;
1117 else if (strcmp(f, "MACSRC_RND") == 0)
1118 pkt_dev->flags |= F_MACSRC_RND;
1120 else if (strcmp(f, "!MACSRC_RND") == 0)
1121 pkt_dev->flags &= ~F_MACSRC_RND;
1123 else if (strcmp(f, "MACDST_RND") == 0)
1124 pkt_dev->flags |= F_MACDST_RND;
1126 else if (strcmp(f, "!MACDST_RND") == 0)
1127 pkt_dev->flags &= ~F_MACDST_RND;
1129 else if (strcmp(f, "MPLS_RND") == 0)
1130 pkt_dev->flags |= F_MPLS_RND;
1132 else if (strcmp(f, "!MPLS_RND") == 0)
1133 pkt_dev->flags &= ~F_MPLS_RND;
1135 else if (strcmp(f, "VID_RND") == 0)
1136 pkt_dev->flags |= F_VID_RND;
1138 else if (strcmp(f, "!VID_RND") == 0)
1139 pkt_dev->flags &= ~F_VID_RND;
1141 else if (strcmp(f, "SVID_RND") == 0)
1142 pkt_dev->flags |= F_SVID_RND;
1144 else if (strcmp(f, "!SVID_RND") == 0)
1145 pkt_dev->flags &= ~F_SVID_RND;
1147 else if (strcmp(f, "FLOW_SEQ") == 0)
1148 pkt_dev->flags |= F_FLOW_SEQ;
1150 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1151 pkt_dev->flags |= F_QUEUE_MAP_RND;
1153 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1154 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1156 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1157 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1159 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1160 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1162 else if (strcmp(f, "IPSEC") == 0)
1163 pkt_dev->flags |= F_IPSEC_ON;
1166 else if (strcmp(f, "!IPV6") == 0)
1167 pkt_dev->flags &= ~F_IPV6;
1171 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1173 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1174 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1177 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1180 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1181 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1185 if (copy_from_user(buf, &user_buffer[i], len))
1188 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1189 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1190 strncpy(pkt_dev->dst_min, buf, len);
1191 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1192 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1195 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1198 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1201 if (!strcmp(name, "dst_max")) {
1202 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1207 if (copy_from_user(buf, &user_buffer[i], len))
1211 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1212 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1213 strncpy(pkt_dev->dst_max, buf, len);
1214 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1215 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1218 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1221 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1224 if (!strcmp(name, "dst6")) {
1225 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1229 pkt_dev->flags |= F_IPV6;
1231 if (copy_from_user(buf, &user_buffer[i], len))
1235 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1236 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1238 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1241 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1244 sprintf(pg_result, "OK: dst6=%s", buf);
1247 if (!strcmp(name, "dst6_min")) {
1248 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1252 pkt_dev->flags |= F_IPV6;
1254 if (copy_from_user(buf, &user_buffer[i], len))
1258 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1259 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1261 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1262 &pkt_dev->min_in6_daddr);
1264 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1267 sprintf(pg_result, "OK: dst6_min=%s", buf);
1270 if (!strcmp(name, "dst6_max")) {
1271 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1275 pkt_dev->flags |= F_IPV6;
1277 if (copy_from_user(buf, &user_buffer[i], len))
1281 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1282 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1285 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1288 sprintf(pg_result, "OK: dst6_max=%s", buf);
1291 if (!strcmp(name, "src6")) {
1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1296 pkt_dev->flags |= F_IPV6;
1298 if (copy_from_user(buf, &user_buffer[i], len))
1302 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1303 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1305 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1308 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1311 sprintf(pg_result, "OK: src6=%s", buf);
1314 if (!strcmp(name, "src_min")) {
1315 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1319 if (copy_from_user(buf, &user_buffer[i], len))
1322 if (strcmp(buf, pkt_dev->src_min) != 0) {
1323 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1324 strncpy(pkt_dev->src_min, buf, len);
1325 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1326 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1329 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1332 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1335 if (!strcmp(name, "src_max")) {
1336 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1340 if (copy_from_user(buf, &user_buffer[i], len))
1343 if (strcmp(buf, pkt_dev->src_max) != 0) {
1344 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1345 strncpy(pkt_dev->src_max, buf, len);
1346 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1347 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1350 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1353 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1356 if (!strcmp(name, "dst_mac")) {
1358 unsigned char old_dmac[ETH_ALEN];
1359 unsigned char *m = pkt_dev->dst_mac;
1360 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1362 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1366 memset(valstr, 0, sizeof(valstr));
1367 if (copy_from_user(valstr, &user_buffer[i], len))
1371 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1372 if (*v >= '0' && *v <= '9') {
1376 if (*v >= 'A' && *v <= 'F') {
1378 *m += *v - 'A' + 10;
1380 if (*v >= 'a' && *v <= 'f') {
1382 *m += *v - 'a' + 10;
1390 /* Set up Dest MAC */
1391 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1392 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1394 sprintf(pg_result, "OK: dstmac");
1397 if (!strcmp(name, "src_mac")) {
1399 unsigned char old_smac[ETH_ALEN];
1400 unsigned char *m = pkt_dev->src_mac;
1402 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1404 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1408 memset(valstr, 0, sizeof(valstr));
1409 if (copy_from_user(valstr, &user_buffer[i], len))
1413 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1414 if (*v >= '0' && *v <= '9') {
1418 if (*v >= 'A' && *v <= 'F') {
1420 *m += *v - 'A' + 10;
1422 if (*v >= 'a' && *v <= 'f') {
1424 *m += *v - 'a' + 10;
1432 /* Set up Src MAC */
1433 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1434 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1436 sprintf(pg_result, "OK: srcmac");
1440 if (!strcmp(name, "clear_counters")) {
1441 pktgen_clear_counters(pkt_dev);
1442 sprintf(pg_result, "OK: Clearing counters.\n");
1446 if (!strcmp(name, "flows")) {
1447 len = num_arg(&user_buffer[i], 10, &value);
1452 if (value > MAX_CFLOWS)
1455 pkt_dev->cflows = value;
1456 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1460 if (!strcmp(name, "flowlen")) {
1461 len = num_arg(&user_buffer[i], 10, &value);
1466 pkt_dev->lflow = value;
1467 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1471 if (!strcmp(name, "queue_map_min")) {
1472 len = num_arg(&user_buffer[i], 5, &value);
1477 pkt_dev->queue_map_min = value;
1478 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1482 if (!strcmp(name, "queue_map_max")) {
1483 len = num_arg(&user_buffer[i], 5, &value);
1488 pkt_dev->queue_map_max = value;
1489 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1493 if (!strcmp(name, "mpls")) {
1496 len = get_labels(&user_buffer[i], pkt_dev);
1500 cnt = sprintf(pg_result, "OK: mpls=");
1501 for (n = 0; n < pkt_dev->nr_labels; n++)
1502 cnt += sprintf(pg_result + cnt,
1503 "%08x%s", ntohl(pkt_dev->labels[n]),
1504 n == pkt_dev->nr_labels-1 ? "" : ",");
1506 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1507 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1508 pkt_dev->svlan_id = 0xffff;
1511 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1516 if (!strcmp(name, "vlan_id")) {
1517 len = num_arg(&user_buffer[i], 4, &value);
1522 if (value <= 4095) {
1523 pkt_dev->vlan_id = value; /* turn on VLAN */
1526 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1528 if (debug && pkt_dev->nr_labels)
1529 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1531 pkt_dev->nr_labels = 0; /* turn off MPLS */
1532 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1534 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1535 pkt_dev->svlan_id = 0xffff;
1538 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1543 if (!strcmp(name, "vlan_p")) {
1544 len = num_arg(&user_buffer[i], 1, &value);
1549 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1550 pkt_dev->vlan_p = value;
1551 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1553 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1558 if (!strcmp(name, "vlan_cfi")) {
1559 len = num_arg(&user_buffer[i], 1, &value);
1564 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1565 pkt_dev->vlan_cfi = value;
1566 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1568 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1573 if (!strcmp(name, "svlan_id")) {
1574 len = num_arg(&user_buffer[i], 4, &value);
1579 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1580 pkt_dev->svlan_id = value; /* turn on SVLAN */
1583 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1585 if (debug && pkt_dev->nr_labels)
1586 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1588 pkt_dev->nr_labels = 0; /* turn off MPLS */
1589 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1591 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1592 pkt_dev->svlan_id = 0xffff;
1595 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1600 if (!strcmp(name, "svlan_p")) {
1601 len = num_arg(&user_buffer[i], 1, &value);
1606 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1607 pkt_dev->svlan_p = value;
1608 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1610 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1615 if (!strcmp(name, "svlan_cfi")) {
1616 len = num_arg(&user_buffer[i], 1, &value);
1621 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1622 pkt_dev->svlan_cfi = value;
1623 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1625 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1630 if (!strcmp(name, "tos")) {
1631 __u32 tmp_value = 0;
1632 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1638 pkt_dev->tos = tmp_value;
1639 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1641 sprintf(pg_result, "ERROR: tos must be 00-ff");
1646 if (!strcmp(name, "traffic_class")) {
1647 __u32 tmp_value = 0;
1648 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1654 pkt_dev->traffic_class = tmp_value;
1655 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1657 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1662 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1666 static int pktgen_if_open(struct inode *inode, struct file *file)
1668 return single_open(file, pktgen_if_show, PDE(inode)->data);
1671 static const struct file_operations pktgen_if_fops = {
1672 .owner = THIS_MODULE,
1673 .open = pktgen_if_open,
1675 .llseek = seq_lseek,
1676 .write = pktgen_if_write,
1677 .release = single_release,
1680 static int pktgen_thread_show(struct seq_file *seq, void *v)
1682 struct pktgen_thread *t = seq->private;
1683 const struct pktgen_dev *pkt_dev;
1687 seq_printf(seq, "Running: ");
1690 list_for_each_entry(pkt_dev, &t->if_list, list)
1691 if (pkt_dev->running)
1692 seq_printf(seq, "%s ", pkt_dev->odev->name);
1694 seq_printf(seq, "\nStopped: ");
1696 list_for_each_entry(pkt_dev, &t->if_list, list)
1697 if (!pkt_dev->running)
1698 seq_printf(seq, "%s ", pkt_dev->odev->name);
1701 seq_printf(seq, "\nResult: %s\n", t->result);
1703 seq_printf(seq, "\nResult: NA\n");
1710 static ssize_t pktgen_thread_write(struct file *file,
1711 const char __user * user_buffer,
1712 size_t count, loff_t * offset)
1714 struct seq_file *seq = (struct seq_file *)file->private_data;
1715 struct pktgen_thread *t = seq->private;
1716 int i = 0, max, len, ret;
1721 // sprintf(pg_result, "Wrong command format");
1726 len = count_trail_chars(&user_buffer[i], max);
1732 /* Read variable name */
1734 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1738 memset(name, 0, sizeof(name));
1739 if (copy_from_user(name, &user_buffer[i], len))
1744 len = count_trail_chars(&user_buffer[i], max);
1751 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1752 name, (unsigned long)count);
1755 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1760 pg_result = &(t->result[0]);
1762 if (!strcmp(name, "add_device")) {
1765 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1770 if (copy_from_user(f, &user_buffer[i], len))
1773 mutex_lock(&pktgen_thread_lock);
1774 pktgen_add_device(t, f);
1775 mutex_unlock(&pktgen_thread_lock);
1777 sprintf(pg_result, "OK: add_device=%s", f);
1781 if (!strcmp(name, "rem_device_all")) {
1782 mutex_lock(&pktgen_thread_lock);
1783 t->control |= T_REMDEVALL;
1784 mutex_unlock(&pktgen_thread_lock);
1785 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1787 sprintf(pg_result, "OK: rem_device_all");
1791 if (!strcmp(name, "max_before_softirq")) {
1792 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1802 static int pktgen_thread_open(struct inode *inode, struct file *file)
1804 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1807 static const struct file_operations pktgen_thread_fops = {
1808 .owner = THIS_MODULE,
1809 .open = pktgen_thread_open,
1811 .llseek = seq_lseek,
1812 .write = pktgen_thread_write,
1813 .release = single_release,
1816 /* Think find or remove for NN */
1817 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1819 struct pktgen_thread *t;
1820 struct pktgen_dev *pkt_dev = NULL;
1822 list_for_each_entry(t, &pktgen_threads, th_list) {
1823 pkt_dev = pktgen_find_dev(t, ifname);
1827 pkt_dev->removal_mark = 1;
1828 t->control |= T_REMDEV;
1838 * mark a device for removal
1840 static void pktgen_mark_device(const char *ifname)
1842 struct pktgen_dev *pkt_dev = NULL;
1843 const int max_tries = 10, msec_per_try = 125;
1846 mutex_lock(&pktgen_thread_lock);
1847 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1851 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1852 if (pkt_dev == NULL)
1853 break; /* success */
1855 mutex_unlock(&pktgen_thread_lock);
1856 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1857 "to disappear....\n", ifname);
1858 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1859 mutex_lock(&pktgen_thread_lock);
1861 if (++i >= max_tries) {
1862 printk(KERN_ERR "pktgen_mark_device: timed out after "
1863 "waiting %d msec for device %s to be removed\n",
1864 msec_per_try * i, ifname);
1870 mutex_unlock(&pktgen_thread_lock);
1873 static void pktgen_change_name(struct net_device *dev)
1875 struct pktgen_thread *t;
1877 list_for_each_entry(t, &pktgen_threads, th_list) {
1878 struct pktgen_dev *pkt_dev;
1880 list_for_each_entry(pkt_dev, &t->if_list, list) {
1881 if (pkt_dev->odev != dev)
1884 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1886 pkt_dev->entry = proc_create_data(dev->name, 0600,
1890 if (!pkt_dev->entry)
1891 printk(KERN_ERR "pktgen: can't move proc "
1892 " entry for '%s'\n", dev->name);
1898 static int pktgen_device_event(struct notifier_block *unused,
1899 unsigned long event, void *ptr)
1901 struct net_device *dev = ptr;
1903 if (!net_eq(dev_net(dev), &init_net))
1906 /* It is OK that we do not hold the group lock right now,
1907 * as we run under the RTNL lock.
1911 case NETDEV_CHANGENAME:
1912 pktgen_change_name(dev);
1915 case NETDEV_UNREGISTER:
1916 pktgen_mark_device(dev->name);
1923 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1929 for (i = 0; ifname[i] != '@'; i++) {
1937 return dev_get_by_name(&init_net, b);
1941 /* Associate pktgen_dev with a device. */
1943 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1945 struct net_device *odev;
1948 /* Clean old setups */
1949 if (pkt_dev->odev) {
1950 dev_put(pkt_dev->odev);
1951 pkt_dev->odev = NULL;
1954 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1956 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1960 if (odev->type != ARPHRD_ETHER) {
1961 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1963 } else if (!netif_running(odev)) {
1964 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1967 pkt_dev->odev = odev;
1975 /* Read pkt_dev from the interface and set up internal pktgen_dev
1976 * structure to have the right information to create/send packets
1978 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1982 if (!pkt_dev->odev) {
1983 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1985 sprintf(pkt_dev->result,
1986 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1990 /* make sure that we don't pick a non-existing transmit queue */
1991 ntxq = pkt_dev->odev->real_num_tx_queues;
1993 if (ntxq <= pkt_dev->queue_map_min) {
1994 printk(KERN_WARNING "pktgen: WARNING: Requested "
1995 "queue_map_min (zero-based) (%d) exceeds valid range "
1996 "[0 - %d] for (%d) queues on %s, resetting\n",
1997 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1998 pkt_dev->odev->name);
1999 pkt_dev->queue_map_min = ntxq - 1;
2001 if (pkt_dev->queue_map_max >= ntxq) {
2002 printk(KERN_WARNING "pktgen: WARNING: Requested "
2003 "queue_map_max (zero-based) (%d) exceeds valid range "
2004 "[0 - %d] for (%d) queues on %s, resetting\n",
2005 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2006 pkt_dev->odev->name);
2007 pkt_dev->queue_map_max = ntxq - 1;
2010 /* Default to the interface's mac if not explicitly set. */
2012 if (is_zero_ether_addr(pkt_dev->src_mac))
2013 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2015 /* Set up Dest MAC */
2016 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2018 /* Set up pkt size */
2019 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2021 if (pkt_dev->flags & F_IPV6) {
2023 * Skip this automatic address setting until locks or functions
2028 int i, set = 0, err = 1;
2029 struct inet6_dev *idev;
2031 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2032 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2040 * Use linklevel address if unconfigured.
2042 * use ipv6_get_lladdr if/when it's get exported
2046 idev = __in6_dev_get(pkt_dev->odev);
2048 struct inet6_ifaddr *ifp;
2050 read_lock_bh(&idev->lock);
2051 for (ifp = idev->addr_list; ifp;
2052 ifp = ifp->if_next) {
2053 if (ifp->scope == IFA_LINK
2055 flags & IFA_F_TENTATIVE)) {
2056 ipv6_addr_copy(&pkt_dev->
2063 read_unlock_bh(&idev->lock);
2067 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2068 "address not availble.\n");
2072 pkt_dev->saddr_min = 0;
2073 pkt_dev->saddr_max = 0;
2074 if (strlen(pkt_dev->src_min) == 0) {
2076 struct in_device *in_dev;
2079 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2081 if (in_dev->ifa_list) {
2082 pkt_dev->saddr_min =
2083 in_dev->ifa_list->ifa_address;
2084 pkt_dev->saddr_max = pkt_dev->saddr_min;
2089 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2090 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2093 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2094 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2096 /* Initialize current values. */
2097 pkt_dev->cur_dst_mac_offset = 0;
2098 pkt_dev->cur_src_mac_offset = 0;
2099 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2100 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2101 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2102 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2103 pkt_dev->nflows = 0;
2107 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2109 ktime_t start_time, end_time;
2111 struct hrtimer_sleeper t;
2113 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2114 hrtimer_set_expires(&t.timer, spin_until);
2116 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2117 if (remaining <= 0) {
2118 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2122 start_time = ktime_now();
2123 if (remaining < 100)
2124 udelay(remaining); /* really small just spin */
2126 /* see do_nanosleep */
2127 hrtimer_init_sleeper(&t, current);
2129 set_current_state(TASK_INTERRUPTIBLE);
2130 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2131 if (!hrtimer_active(&t.timer))
2137 hrtimer_cancel(&t.timer);
2138 } while (t.task && pkt_dev->running && !signal_pending(current));
2139 __set_current_state(TASK_RUNNING);
2141 end_time = ktime_now();
2143 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2144 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2147 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2149 pkt_dev->pkt_overhead = 0;
2150 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2151 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2152 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2155 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2157 return !!(pkt_dev->flows[flow].flags & F_INIT);
2160 static inline int f_pick(struct pktgen_dev *pkt_dev)
2162 int flow = pkt_dev->curfl;
2164 if (pkt_dev->flags & F_FLOW_SEQ) {
2165 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2167 pkt_dev->flows[flow].count = 0;
2168 pkt_dev->flows[flow].flags = 0;
2169 pkt_dev->curfl += 1;
2170 if (pkt_dev->curfl >= pkt_dev->cflows)
2171 pkt_dev->curfl = 0; /*reset */
2174 flow = random32() % pkt_dev->cflows;
2175 pkt_dev->curfl = flow;
2177 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2178 pkt_dev->flows[flow].count = 0;
2179 pkt_dev->flows[flow].flags = 0;
2183 return pkt_dev->curfl;
2188 /* If there was already an IPSEC SA, we keep it as is, else
2189 * we go look for it ...
2191 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2193 struct xfrm_state *x = pkt_dev->flows[flow].x;
2195 /*slow path: we dont already have xfrm_state*/
2196 x = xfrm_stateonly_find(&init_net,
2197 (xfrm_address_t *)&pkt_dev->cur_daddr,
2198 (xfrm_address_t *)&pkt_dev->cur_saddr,
2201 pkt_dev->ipsproto, 0);
2203 pkt_dev->flows[flow].x = x;
2204 set_pkt_overhead(pkt_dev);
2205 pkt_dev->pkt_overhead += x->props.header_len;
2211 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2214 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2215 pkt_dev->cur_queue_map = smp_processor_id();
2217 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2219 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2221 (pkt_dev->queue_map_max -
2222 pkt_dev->queue_map_min + 1)
2223 + pkt_dev->queue_map_min;
2225 t = pkt_dev->cur_queue_map + 1;
2226 if (t > pkt_dev->queue_map_max)
2227 t = pkt_dev->queue_map_min;
2229 pkt_dev->cur_queue_map = t;
2231 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2234 /* Increment/randomize headers according to flags and current values
2235 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2237 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2243 if (pkt_dev->cflows)
2244 flow = f_pick(pkt_dev);
2246 /* Deal with source MAC */
2247 if (pkt_dev->src_mac_count > 1) {
2251 if (pkt_dev->flags & F_MACSRC_RND)
2252 mc = random32() % pkt_dev->src_mac_count;
2254 mc = pkt_dev->cur_src_mac_offset++;
2255 if (pkt_dev->cur_src_mac_offset >=
2256 pkt_dev->src_mac_count)
2257 pkt_dev->cur_src_mac_offset = 0;
2260 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2261 pkt_dev->hh[11] = tmp;
2262 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2263 pkt_dev->hh[10] = tmp;
2264 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2265 pkt_dev->hh[9] = tmp;
2266 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2267 pkt_dev->hh[8] = tmp;
2268 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2269 pkt_dev->hh[7] = tmp;
2272 /* Deal with Destination MAC */
2273 if (pkt_dev->dst_mac_count > 1) {
2277 if (pkt_dev->flags & F_MACDST_RND)
2278 mc = random32() % pkt_dev->dst_mac_count;
2281 mc = pkt_dev->cur_dst_mac_offset++;
2282 if (pkt_dev->cur_dst_mac_offset >=
2283 pkt_dev->dst_mac_count) {
2284 pkt_dev->cur_dst_mac_offset = 0;
2288 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2289 pkt_dev->hh[5] = tmp;
2290 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2291 pkt_dev->hh[4] = tmp;
2292 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2293 pkt_dev->hh[3] = tmp;
2294 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2295 pkt_dev->hh[2] = tmp;
2296 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2297 pkt_dev->hh[1] = tmp;
2300 if (pkt_dev->flags & F_MPLS_RND) {
2302 for (i = 0; i < pkt_dev->nr_labels; i++)
2303 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2304 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2305 ((__force __be32)random32() &
2309 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2310 pkt_dev->vlan_id = random32() & (4096-1);
2313 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2314 pkt_dev->svlan_id = random32() & (4096 - 1);
2317 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2318 if (pkt_dev->flags & F_UDPSRC_RND)
2319 pkt_dev->cur_udp_src = random32() %
2320 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2321 + pkt_dev->udp_src_min;
2324 pkt_dev->cur_udp_src++;
2325 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2326 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2330 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2331 if (pkt_dev->flags & F_UDPDST_RND) {
2332 pkt_dev->cur_udp_dst = random32() %
2333 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2334 + pkt_dev->udp_dst_min;
2336 pkt_dev->cur_udp_dst++;
2337 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2338 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2342 if (!(pkt_dev->flags & F_IPV6)) {
2344 imn = ntohl(pkt_dev->saddr_min);
2345 imx = ntohl(pkt_dev->saddr_max);
2348 if (pkt_dev->flags & F_IPSRC_RND)
2349 t = random32() % (imx - imn) + imn;
2351 t = ntohl(pkt_dev->cur_saddr);
2357 pkt_dev->cur_saddr = htonl(t);
2360 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2361 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2363 imn = ntohl(pkt_dev->daddr_min);
2364 imx = ntohl(pkt_dev->daddr_max);
2368 if (pkt_dev->flags & F_IPDST_RND) {
2370 t = random32() % (imx - imn) + imn;
2373 while (ipv4_is_loopback(s) ||
2374 ipv4_is_multicast(s) ||
2375 ipv4_is_lbcast(s) ||
2376 ipv4_is_zeronet(s) ||
2377 ipv4_is_local_multicast(s)) {
2378 t = random32() % (imx - imn) + imn;
2381 pkt_dev->cur_daddr = s;
2383 t = ntohl(pkt_dev->cur_daddr);
2388 pkt_dev->cur_daddr = htonl(t);
2391 if (pkt_dev->cflows) {
2392 pkt_dev->flows[flow].flags |= F_INIT;
2393 pkt_dev->flows[flow].cur_daddr =
2396 if (pkt_dev->flags & F_IPSEC_ON)
2397 get_ipsec_sa(pkt_dev, flow);
2402 } else { /* IPV6 * */
2404 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2405 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2406 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2407 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2411 /* Only random destinations yet */
2413 for (i = 0; i < 4; i++) {
2414 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2415 (((__force __be32)random32() |
2416 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2417 pkt_dev->max_in6_daddr.s6_addr32[i]);
2422 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2424 if (pkt_dev->flags & F_TXSIZE_RND) {
2426 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2427 + pkt_dev->min_pkt_size;
2429 t = pkt_dev->cur_pkt_size + 1;
2430 if (t > pkt_dev->max_pkt_size)
2431 t = pkt_dev->min_pkt_size;
2433 pkt_dev->cur_pkt_size = t;
2436 set_cur_queue_map(pkt_dev);
2438 pkt_dev->flows[flow].count++;
2443 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2445 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2451 /* XXX: we dont support tunnel mode for now until
2452 * we resolve the dst issue */
2453 if (x->props.mode != XFRM_MODE_TRANSPORT)
2456 spin_lock(&x->lock);
2459 err = x->outer_mode->output(x, skb);
2462 err = x->type->output(x, skb);
2466 x->curlft.bytes += skb->len;
2467 x->curlft.packets++;
2469 spin_unlock(&x->lock);
2473 static void free_SAs(struct pktgen_dev *pkt_dev)
2475 if (pkt_dev->cflows) {
2476 /* let go of the SAs if we have them */
2478 for (; i < pkt_dev->cflows; i++) {
2479 struct xfrm_state *x = pkt_dev->flows[i].x;
2482 pkt_dev->flows[i].x = NULL;
2488 static int process_ipsec(struct pktgen_dev *pkt_dev,
2489 struct sk_buff *skb, __be16 protocol)
2491 if (pkt_dev->flags & F_IPSEC_ON) {
2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2497 nhead = x->props.header_len - skb_headroom(skb);
2499 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2501 printk(KERN_ERR "Error expanding "
2502 "ipsec packet %d\n", ret);
2507 /* ipsec is not expecting ll header */
2508 skb_pull(skb, ETH_HLEN);
2509 ret = pktgen_output_ipsec(skb, pkt_dev);
2511 printk(KERN_ERR "Error creating ipsec "
2512 "packet %d\n", ret);
2516 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2517 memcpy(eth, pkt_dev->hh, 12);
2518 *(u16 *) ð[12] = protocol;
2528 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2531 for (i = 0; i < pkt_dev->nr_labels; i++)
2532 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2535 *mpls |= MPLS_STACK_BOTTOM;
2538 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2541 return htons(id | (cfi << 12) | (prio << 13));
2544 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2545 struct pktgen_dev *pkt_dev)
2547 struct sk_buff *skb = NULL;
2549 struct udphdr *udph;
2552 struct pktgen_hdr *pgh = NULL;
2553 __be16 protocol = htons(ETH_P_IP);
2555 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2556 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2557 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2558 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2561 if (pkt_dev->nr_labels)
2562 protocol = htons(ETH_P_MPLS_UC);
2564 if (pkt_dev->vlan_id != 0xffff)
2565 protocol = htons(ETH_P_8021Q);
2567 /* Update any of the values, used when we're incrementing various
2570 queue_map = pkt_dev->cur_queue_map;
2571 mod_cur_headers(pkt_dev);
2573 datalen = (odev->hard_header_len + 16) & ~0xf;
2574 skb = __netdev_alloc_skb(odev,
2575 pkt_dev->cur_pkt_size + 64
2576 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2578 sprintf(pkt_dev->result, "No memory");
2582 skb_reserve(skb, datalen);
2584 /* Reserve for ethernet and IP header */
2585 eth = (__u8 *) skb_push(skb, 14);
2586 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2587 if (pkt_dev->nr_labels)
2588 mpls_push(mpls, pkt_dev);
2590 if (pkt_dev->vlan_id != 0xffff) {
2591 if (pkt_dev->svlan_id != 0xffff) {
2592 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2593 *svlan_tci = build_tci(pkt_dev->svlan_id,
2596 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2597 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2599 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2600 *vlan_tci = build_tci(pkt_dev->vlan_id,
2603 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2604 *vlan_encapsulated_proto = htons(ETH_P_IP);
2607 skb->network_header = skb->tail;
2608 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2609 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2610 skb_set_queue_mapping(skb, queue_map);
2612 udph = udp_hdr(skb);
2614 memcpy(eth, pkt_dev->hh, 12);
2615 *(__be16 *) & eth[12] = protocol;
2617 /* Eth + IPh + UDPh + mpls */
2618 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2619 pkt_dev->pkt_overhead;
2620 if (datalen < sizeof(struct pktgen_hdr))
2621 datalen = sizeof(struct pktgen_hdr);
2623 udph->source = htons(pkt_dev->cur_udp_src);
2624 udph->dest = htons(pkt_dev->cur_udp_dst);
2625 udph->len = htons(datalen + 8); /* DATA + udphdr */
2626 udph->check = 0; /* No checksum */
2631 iph->tos = pkt_dev->tos;
2632 iph->protocol = IPPROTO_UDP; /* UDP */
2633 iph->saddr = pkt_dev->cur_saddr;
2634 iph->daddr = pkt_dev->cur_daddr;
2635 iph->id = htons(pkt_dev->ip_id);
2638 iplen = 20 + 8 + datalen;
2639 iph->tot_len = htons(iplen);
2641 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2642 skb->protocol = protocol;
2643 skb->mac_header = (skb->network_header - ETH_HLEN -
2644 pkt_dev->pkt_overhead);
2646 skb->pkt_type = PACKET_HOST;
2648 if (pkt_dev->nfrags <= 0) {
2649 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2650 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2652 int frags = pkt_dev->nfrags;
2655 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2657 if (frags > MAX_SKB_FRAGS)
2658 frags = MAX_SKB_FRAGS;
2659 if (datalen > frags * PAGE_SIZE) {
2660 len = datalen - frags * PAGE_SIZE;
2661 memset(skb_put(skb, len), 0, len);
2662 datalen = frags * PAGE_SIZE;
2666 while (datalen > 0) {
2667 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2668 skb_shinfo(skb)->frags[i].page = page;
2669 skb_shinfo(skb)->frags[i].page_offset = 0;
2670 skb_shinfo(skb)->frags[i].size =
2671 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2672 datalen -= skb_shinfo(skb)->frags[i].size;
2673 skb->len += skb_shinfo(skb)->frags[i].size;
2674 skb->data_len += skb_shinfo(skb)->frags[i].size;
2676 skb_shinfo(skb)->nr_frags = i;
2685 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2689 skb_shinfo(skb)->frags[i - 1].size -= rem;
2691 skb_shinfo(skb)->frags[i] =
2692 skb_shinfo(skb)->frags[i - 1];
2693 get_page(skb_shinfo(skb)->frags[i].page);
2694 skb_shinfo(skb)->frags[i].page =
2695 skb_shinfo(skb)->frags[i - 1].page;
2696 skb_shinfo(skb)->frags[i].page_offset +=
2697 skb_shinfo(skb)->frags[i - 1].size;
2698 skb_shinfo(skb)->frags[i].size = rem;
2700 skb_shinfo(skb)->nr_frags = i;
2704 /* Stamp the time, and sequence number,
2705 * convert them to network byte order
2708 struct timeval timestamp;
2710 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2711 pgh->seq_num = htonl(pkt_dev->seq_num);
2713 do_gettimeofday(×tamp);
2714 pgh->tv_sec = htonl(timestamp.tv_sec);
2715 pgh->tv_usec = htonl(timestamp.tv_usec);
2719 if (!process_ipsec(pkt_dev, skb, protocol))
2727 * scan_ip6, fmt_ip taken from dietlibc-0.21
2730 * Slightly modified for kernel.
2731 * Should be candidate for net/ipv4/utils.c
2735 static unsigned int scan_ip6(const char *s, char ip[16])
2738 unsigned int len = 0;
2741 unsigned int prefixlen = 0;
2742 unsigned int suffixlen = 0;
2746 for (i = 0; i < 16; i++)
2752 if (s[1] == ':') { /* Found "::", skip to part 2 */
2760 u = simple_strtoul(s, &pos, 16);
2764 if (prefixlen == 12 && s[i] == '.') {
2766 /* the last 4 bytes may be written as IPv4 address */
2769 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2772 ip[prefixlen++] = (u >> 8);
2773 ip[prefixlen++] = (u & 255);
2776 if (prefixlen == 16)
2780 /* part 2, after "::" */
2787 } else if (suffixlen != 0)
2790 u = simple_strtol(s, &pos, 16);
2797 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2799 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2805 suffix[suffixlen++] = (u >> 8);
2806 suffix[suffixlen++] = (u & 255);
2809 if (prefixlen + suffixlen == 16)
2812 for (i = 0; i < suffixlen; i++)
2813 ip[16 - suffixlen + i] = suffix[i];
2817 static char tohex(char hexdigit)
2819 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2822 static int fmt_xlong(char *s, unsigned int i)
2825 *s = tohex((i >> 12) & 0xf);
2826 if (s != bak || *s != '0')
2828 *s = tohex((i >> 8) & 0xf);
2829 if (s != bak || *s != '0')
2831 *s = tohex((i >> 4) & 0xf);
2832 if (s != bak || *s != '0')
2834 *s = tohex(i & 0xf);
2838 static unsigned int fmt_ip6(char *s, const char ip[16])
2843 unsigned int compressing;
2848 for (j = 0; j < 16; j += 2) {
2850 #ifdef V4MAPPEDPREFIX
2851 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2852 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2857 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2858 (unsigned long)(unsigned char)ip[j + 1];
2873 i = fmt_xlong(s, temp);
2890 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2891 struct pktgen_dev *pkt_dev)
2893 struct sk_buff *skb = NULL;
2895 struct udphdr *udph;
2897 struct ipv6hdr *iph;
2898 struct pktgen_hdr *pgh = NULL;
2899 __be16 protocol = htons(ETH_P_IPV6);
2901 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2902 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2903 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2904 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2907 if (pkt_dev->nr_labels)
2908 protocol = htons(ETH_P_MPLS_UC);
2910 if (pkt_dev->vlan_id != 0xffff)
2911 protocol = htons(ETH_P_8021Q);
2913 /* Update any of the values, used when we're incrementing various
2916 queue_map = pkt_dev->cur_queue_map;
2917 mod_cur_headers(pkt_dev);
2919 skb = __netdev_alloc_skb(odev,
2920 pkt_dev->cur_pkt_size + 64
2921 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2923 sprintf(pkt_dev->result, "No memory");
2927 skb_reserve(skb, 16);
2929 /* Reserve for ethernet and IP header */
2930 eth = (__u8 *) skb_push(skb, 14);
2931 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2932 if (pkt_dev->nr_labels)
2933 mpls_push(mpls, pkt_dev);
2935 if (pkt_dev->vlan_id != 0xffff) {
2936 if (pkt_dev->svlan_id != 0xffff) {
2937 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2938 *svlan_tci = build_tci(pkt_dev->svlan_id,
2941 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2942 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2944 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2945 *vlan_tci = build_tci(pkt_dev->vlan_id,
2948 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2949 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2952 skb->network_header = skb->tail;
2953 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2954 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2955 skb_set_queue_mapping(skb, queue_map);
2956 iph = ipv6_hdr(skb);
2957 udph = udp_hdr(skb);
2959 memcpy(eth, pkt_dev->hh, 12);
2960 *(__be16 *) ð[12] = protocol;
2962 /* Eth + IPh + UDPh + mpls */
2963 datalen = pkt_dev->cur_pkt_size - 14 -
2964 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2965 pkt_dev->pkt_overhead;
2967 if (datalen < sizeof(struct pktgen_hdr)) {
2968 datalen = sizeof(struct pktgen_hdr);
2969 if (net_ratelimit())
2970 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2974 udph->source = htons(pkt_dev->cur_udp_src);
2975 udph->dest = htons(pkt_dev->cur_udp_dst);
2976 udph->len = htons(datalen + sizeof(struct udphdr));
2977 udph->check = 0; /* No checksum */
2979 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2981 if (pkt_dev->traffic_class) {
2982 /* Version + traffic class + flow (0) */
2983 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2986 iph->hop_limit = 32;
2988 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2989 iph->nexthdr = IPPROTO_UDP;
2991 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2992 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2994 skb->mac_header = (skb->network_header - ETH_HLEN -
2995 pkt_dev->pkt_overhead);
2996 skb->protocol = protocol;
2998 skb->pkt_type = PACKET_HOST;
3000 if (pkt_dev->nfrags <= 0)
3001 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3003 int frags = pkt_dev->nfrags;
3006 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3008 if (frags > MAX_SKB_FRAGS)
3009 frags = MAX_SKB_FRAGS;
3010 if (datalen > frags * PAGE_SIZE) {
3011 skb_put(skb, datalen - frags * PAGE_SIZE);
3012 datalen = frags * PAGE_SIZE;
3016 while (datalen > 0) {
3017 struct page *page = alloc_pages(GFP_KERNEL, 0);
3018 skb_shinfo(skb)->frags[i].page = page;
3019 skb_shinfo(skb)->frags[i].page_offset = 0;
3020 skb_shinfo(skb)->frags[i].size =
3021 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3022 datalen -= skb_shinfo(skb)->frags[i].size;
3023 skb->len += skb_shinfo(skb)->frags[i].size;
3024 skb->data_len += skb_shinfo(skb)->frags[i].size;
3026 skb_shinfo(skb)->nr_frags = i;
3035 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3039 skb_shinfo(skb)->frags[i - 1].size -= rem;
3041 skb_shinfo(skb)->frags[i] =
3042 skb_shinfo(skb)->frags[i - 1];
3043 get_page(skb_shinfo(skb)->frags[i].page);
3044 skb_shinfo(skb)->frags[i].page =
3045 skb_shinfo(skb)->frags[i - 1].page;
3046 skb_shinfo(skb)->frags[i].page_offset +=
3047 skb_shinfo(skb)->frags[i - 1].size;
3048 skb_shinfo(skb)->frags[i].size = rem;
3050 skb_shinfo(skb)->nr_frags = i;
3054 /* Stamp the time, and sequence number,
3055 * convert them to network byte order
3056 * should we update cloned packets too ?
3059 struct timeval timestamp;
3061 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3062 pgh->seq_num = htonl(pkt_dev->seq_num);
3064 do_gettimeofday(×tamp);
3065 pgh->tv_sec = htonl(timestamp.tv_sec);
3066 pgh->tv_usec = htonl(timestamp.tv_usec);
3068 /* pkt_dev->seq_num++; FF: you really mean this? */
3073 static struct sk_buff *fill_packet(struct net_device *odev,
3074 struct pktgen_dev *pkt_dev)
3076 if (pkt_dev->flags & F_IPV6)
3077 return fill_packet_ipv6(odev, pkt_dev);
3079 return fill_packet_ipv4(odev, pkt_dev);
3082 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3084 pkt_dev->seq_num = 1;
3085 pkt_dev->idle_acc = 0;
3087 pkt_dev->tx_bytes = 0;
3088 pkt_dev->errors = 0;
3091 /* Set up structure for sending pkts, clear counters */
3093 static void pktgen_run(struct pktgen_thread *t)
3095 struct pktgen_dev *pkt_dev;
3098 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3101 list_for_each_entry(pkt_dev, &t->if_list, list) {
3104 * setup odev and create initial packet.
3106 pktgen_setup_inject(pkt_dev);
3108 if (pkt_dev->odev) {
3109 pktgen_clear_counters(pkt_dev);
3110 pkt_dev->running = 1; /* Cranke yeself! */
3111 pkt_dev->skb = NULL;
3112 pkt_dev->started_at =
3113 pkt_dev->next_tx = ktime_now();
3115 set_pkt_overhead(pkt_dev);
3117 strcpy(pkt_dev->result, "Starting");
3120 strcpy(pkt_dev->result, "Error starting");
3124 t->control &= ~(T_STOP);
3127 static void pktgen_stop_all_threads_ifs(void)
3129 struct pktgen_thread *t;
3131 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3133 mutex_lock(&pktgen_thread_lock);
3135 list_for_each_entry(t, &pktgen_threads, th_list)
3136 t->control |= T_STOP;
3138 mutex_unlock(&pktgen_thread_lock);
3141 static int thread_is_running(const struct pktgen_thread *t)
3143 const struct pktgen_dev *pkt_dev;
3145 list_for_each_entry(pkt_dev, &t->if_list, list)
3146 if (pkt_dev->running)
3151 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3155 while (thread_is_running(t)) {
3159 msleep_interruptible(100);
3161 if (signal_pending(current))
3171 static int pktgen_wait_all_threads_run(void)
3173 struct pktgen_thread *t;
3176 mutex_lock(&pktgen_thread_lock);
3178 list_for_each_entry(t, &pktgen_threads, th_list) {
3179 sig = pktgen_wait_thread_run(t);
3185 list_for_each_entry(t, &pktgen_threads, th_list)
3186 t->control |= (T_STOP);
3188 mutex_unlock(&pktgen_thread_lock);
3192 static void pktgen_run_all_threads(void)
3194 struct pktgen_thread *t;
3196 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3198 mutex_lock(&pktgen_thread_lock);
3200 list_for_each_entry(t, &pktgen_threads, th_list)
3201 t->control |= (T_RUN);
3203 mutex_unlock(&pktgen_thread_lock);
3205 /* Propagate thread->control */
3206 schedule_timeout_interruptible(msecs_to_jiffies(125));
3208 pktgen_wait_all_threads_run();
3211 static void pktgen_reset_all_threads(void)
3213 struct pktgen_thread *t;
3215 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3217 mutex_lock(&pktgen_thread_lock);
3219 list_for_each_entry(t, &pktgen_threads, th_list)
3220 t->control |= (T_REMDEVALL);
3222 mutex_unlock(&pktgen_thread_lock);
3224 /* Propagate thread->control */
3225 schedule_timeout_interruptible(msecs_to_jiffies(125));
3227 pktgen_wait_all_threads_run();
3230 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3232 __u64 bps, mbps, pps;
3233 char *p = pkt_dev->result;
3234 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3235 pkt_dev->started_at);
3236 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3238 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3239 (unsigned long long)ktime_to_us(elapsed),
3240 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3241 (unsigned long long)ktime_to_us(idle),
3242 (unsigned long long)pkt_dev->sofar,
3243 pkt_dev->cur_pkt_size, nr_frags);
3245 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3246 ktime_to_ns(elapsed));
3248 bps = pps * 8 * pkt_dev->cur_pkt_size;
3251 do_div(mbps, 1000000);
3252 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3253 (unsigned long long)pps,
3254 (unsigned long long)mbps,
3255 (unsigned long long)bps,
3256 (unsigned long long)pkt_dev->errors);
3259 /* Set stopped-at timer, remove from running list, do counters & statistics */
3260 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3262 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3264 if (!pkt_dev->running) {
3265 printk(KERN_WARNING "pktgen: interface: %s is already "
3266 "stopped\n", pkt_dev->odev->name);
3270 kfree_skb(pkt_dev->skb);
3271 pkt_dev->skb = NULL;
3272 pkt_dev->stopped_at = ktime_now();
3273 pkt_dev->running = 0;
3275 show_results(pkt_dev, nr_frags);
3280 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3282 struct pktgen_dev *pkt_dev, *best = NULL;
3286 list_for_each_entry(pkt_dev, &t->if_list, list) {
3287 if (!pkt_dev->running)
3291 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3298 static void pktgen_stop(struct pktgen_thread *t)
3300 struct pktgen_dev *pkt_dev;
3302 pr_debug("pktgen: entering pktgen_stop\n");
3306 list_for_each_entry(pkt_dev, &t->if_list, list) {
3307 pktgen_stop_device(pkt_dev);
3314 * one of our devices needs to be removed - find it
3317 static void pktgen_rem_one_if(struct pktgen_thread *t)
3319 struct list_head *q, *n;
3320 struct pktgen_dev *cur;
3322 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3326 list_for_each_safe(q, n, &t->if_list) {
3327 cur = list_entry(q, struct pktgen_dev, list);
3329 if (!cur->removal_mark)
3332 kfree_skb(cur->skb);
3335 pktgen_remove_device(t, cur);
3343 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3345 struct list_head *q, *n;
3346 struct pktgen_dev *cur;
3348 /* Remove all devices, free mem */
3350 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3353 list_for_each_safe(q, n, &t->if_list) {
3354 cur = list_entry(q, struct pktgen_dev, list);
3356 kfree_skb(cur->skb);
3359 pktgen_remove_device(t, cur);
3365 static void pktgen_rem_thread(struct pktgen_thread *t)
3367 /* Remove from the thread list */
3369 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3371 mutex_lock(&pktgen_thread_lock);
3373 list_del(&t->th_list);
3375 mutex_unlock(&pktgen_thread_lock);
3378 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3380 ktime_t idle_start = ktime_now();
3382 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3385 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3387 ktime_t idle_start = ktime_now();
3389 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3390 if (signal_pending(current))
3394 pktgen_resched(pkt_dev);
3398 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3401 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3403 struct net_device *odev = pkt_dev->odev;
3404 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3405 = odev->netdev_ops->ndo_start_xmit;
3406 struct netdev_queue *txq;
3410 /* If device is offline, then don't send */
3411 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3412 pktgen_stop_device(pkt_dev);
3416 /* This is max DELAY, this has special meaning of
3419 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3420 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3424 /* If no skb or clone count exhausted then get new one */
3425 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3426 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3427 /* build a new pkt */
3428 kfree_skb(pkt_dev->skb);
3430 pkt_dev->skb = fill_packet(odev, pkt_dev);
3431 if (pkt_dev->skb == NULL) {
3432 printk(KERN_ERR "pktgen: ERROR: couldn't "
3433 "allocate skb in fill_packet.\n");
3435 pkt_dev->clone_count--; /* back out increment, OOM */
3438 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3439 pkt_dev->allocated_skbs++;
3440 pkt_dev->clone_count = 0; /* reset counter */
3443 if (pkt_dev->delay && pkt_dev->last_ok)
3444 spin(pkt_dev, pkt_dev->next_tx);
3446 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3447 txq = netdev_get_tx_queue(odev, queue_map);
3449 __netif_tx_lock_bh(txq);
3451 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3452 ret = NETDEV_TX_BUSY;
3453 pkt_dev->last_ok = 0;
3456 atomic_inc(&(pkt_dev->skb->users));
3457 ret = (*xmit)(pkt_dev->skb, odev);
3461 txq_trans_update(txq);
3462 pkt_dev->last_ok = 1;
3465 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3467 default: /* Drivers are not supposed to return other values! */
3468 if (net_ratelimit())
3469 pr_info("pktgen: %s xmit error: %d\n",
3473 case NETDEV_TX_LOCKED:
3474 case NETDEV_TX_BUSY:
3475 /* Retry it next time */
3476 atomic_dec(&(pkt_dev->skb->users));
3477 pkt_dev->last_ok = 0;
3480 __netif_tx_unlock_bh(txq);
3482 /* If pkt_dev->count is zero, then run forever */
3483 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3484 pktgen_wait_for_skb(pkt_dev);
3486 /* Done with this */
3487 pktgen_stop_device(pkt_dev);
3492 * Main loop of the thread goes here
3495 static int pktgen_thread_worker(void *arg)
3498 struct pktgen_thread *t = arg;
3499 struct pktgen_dev *pkt_dev = NULL;
3502 BUG_ON(smp_processor_id() != cpu);
3504 init_waitqueue_head(&t->queue);
3505 complete(&t->start_done);
3507 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3508 cpu, task_pid_nr(current));
3510 set_current_state(TASK_INTERRUPTIBLE);
3514 while (!kthread_should_stop()) {
3515 pkt_dev = next_to_run(t);
3517 if (unlikely(!pkt_dev && t->control == 0)) {
3518 wait_event_interruptible_timeout(t->queue,
3524 __set_current_state(TASK_RUNNING);
3526 if (likely(pkt_dev)) {
3527 pktgen_xmit(pkt_dev);
3530 pktgen_resched(pkt_dev);
3535 if (t->control & T_STOP) {
3537 t->control &= ~(T_STOP);
3540 if (t->control & T_RUN) {
3542 t->control &= ~(T_RUN);
3545 if (t->control & T_REMDEVALL) {
3546 pktgen_rem_all_ifs(t);
3547 t->control &= ~(T_REMDEVALL);
3550 if (t->control & T_REMDEV) {
3551 pktgen_rem_one_if(t);
3552 t->control &= ~(T_REMDEV);
3557 set_current_state(TASK_INTERRUPTIBLE);
3560 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3563 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3564 pktgen_rem_all_ifs(t);
3566 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3567 pktgen_rem_thread(t);
3572 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3575 struct pktgen_dev *p, *pkt_dev = NULL;
3578 list_for_each_entry(p, &t->if_list, list)
3579 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3585 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3590 * Adds a dev at front of if_list.
3593 static int add_dev_to_thread(struct pktgen_thread *t,
3594 struct pktgen_dev *pkt_dev)
3600 if (pkt_dev->pg_thread) {
3601 printk(KERN_ERR "pktgen: ERROR: already assigned "
3607 list_add(&pkt_dev->list, &t->if_list);
3608 pkt_dev->pg_thread = t;
3609 pkt_dev->running = 0;
3616 /* Called under thread lock */
3618 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3620 struct pktgen_dev *pkt_dev;
3623 /* We don't allow a device to be on several threads */
3625 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3627 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3631 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3635 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3636 if (pkt_dev->flows == NULL) {
3640 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3642 pkt_dev->removal_mark = 0;
3643 pkt_dev->min_pkt_size = ETH_ZLEN;
3644 pkt_dev->max_pkt_size = ETH_ZLEN;
3645 pkt_dev->nfrags = 0;
3646 pkt_dev->clone_skb = pg_clone_skb_d;
3647 pkt_dev->delay = pg_delay_d;
3648 pkt_dev->count = pg_count_d;
3650 pkt_dev->udp_src_min = 9; /* sink port */
3651 pkt_dev->udp_src_max = 9;
3652 pkt_dev->udp_dst_min = 9;
3653 pkt_dev->udp_dst_max = 9;
3655 pkt_dev->vlan_p = 0;
3656 pkt_dev->vlan_cfi = 0;
3657 pkt_dev->vlan_id = 0xffff;
3658 pkt_dev->svlan_p = 0;
3659 pkt_dev->svlan_cfi = 0;
3660 pkt_dev->svlan_id = 0xffff;
3662 err = pktgen_setup_dev(pkt_dev, ifname);
3666 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3667 &pktgen_if_fops, pkt_dev);
3668 if (!pkt_dev->entry) {
3669 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3670 PG_PROC_DIR, ifname);
3675 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3676 pkt_dev->ipsproto = IPPROTO_ESP;
3679 return add_dev_to_thread(t, pkt_dev);
3681 dev_put(pkt_dev->odev);
3686 vfree(pkt_dev->flows);
3691 static int __init pktgen_create_thread(int cpu)
3693 struct pktgen_thread *t;
3694 struct proc_dir_entry *pe;
3695 struct task_struct *p;
3697 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3699 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3700 "create new thread.\n");
3704 spin_lock_init(&t->if_lock);
3707 INIT_LIST_HEAD(&t->if_list);
3709 list_add_tail(&t->th_list, &pktgen_threads);
3710 init_completion(&t->start_done);
3712 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3714 printk(KERN_ERR "pktgen: kernel_thread() failed "
3715 "for cpu %d\n", t->cpu);
3716 list_del(&t->th_list);
3720 kthread_bind(p, cpu);
3723 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3724 &pktgen_thread_fops, t);
3726 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3727 PG_PROC_DIR, t->tsk->comm);
3729 list_del(&t->th_list);
3735 wait_for_completion(&t->start_done);
3741 * Removes a device from the thread if_list.
3743 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3744 struct pktgen_dev *pkt_dev)
3746 struct list_head *q, *n;
3747 struct pktgen_dev *p;
3749 list_for_each_safe(q, n, &t->if_list) {
3750 p = list_entry(q, struct pktgen_dev, list);
3756 static int pktgen_remove_device(struct pktgen_thread *t,
3757 struct pktgen_dev *pkt_dev)
3760 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3762 if (pkt_dev->running) {
3763 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3764 "running interface, stopping it now.\n");
3765 pktgen_stop_device(pkt_dev);
3768 /* Dis-associate from the interface */
3770 if (pkt_dev->odev) {
3771 dev_put(pkt_dev->odev);
3772 pkt_dev->odev = NULL;
3775 /* And update the thread if_list */
3777 _rem_dev_from_if_list(t, pkt_dev);
3780 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3785 vfree(pkt_dev->flows);
3790 static int __init pg_init(void)
3793 struct proc_dir_entry *pe;
3795 printk(KERN_INFO "%s", version);
3797 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3801 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3803 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3804 "procfs entry.\n", PGCTRL);
3805 proc_net_remove(&init_net, PG_PROC_DIR);
3809 /* Register us to receive netdevice events */
3810 register_netdevice_notifier(&pktgen_notifier_block);
3812 for_each_online_cpu(cpu) {
3815 err = pktgen_create_thread(cpu);
3817 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3818 "thread for cpu %d (%d)\n", cpu, err);
3821 if (list_empty(&pktgen_threads)) {
3822 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3824 unregister_netdevice_notifier(&pktgen_notifier_block);
3825 remove_proc_entry(PGCTRL, pg_proc_dir);
3826 proc_net_remove(&init_net, PG_PROC_DIR);
3833 static void __exit pg_cleanup(void)
3835 struct pktgen_thread *t;
3836 struct list_head *q, *n;
3837 wait_queue_head_t queue;
3838 init_waitqueue_head(&queue);
3840 /* Stop all interfaces & threads */
3842 list_for_each_safe(q, n, &pktgen_threads) {
3843 t = list_entry(q, struct pktgen_thread, th_list);
3844 kthread_stop(t->tsk);
3848 /* Un-register us from receiving netdevice events */
3849 unregister_netdevice_notifier(&pktgen_notifier_block);
3851 /* Clean up proc file system */
3852 remove_proc_entry(PGCTRL, pg_proc_dir);
3853 proc_net_remove(&init_net, PG_PROC_DIR);
3856 module_init(pg_init);
3857 module_exit(pg_cleanup);
3860 MODULE_DESCRIPTION("Packet Generator tool");
3861 MODULE_LICENSE("GPL");
3862 MODULE_VERSION(VERSION);
3863 module_param(pg_count_d, int, 0);
3864 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3865 module_param(pg_delay_d, int, 0);
3866 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3867 module_param(pg_clone_skb_d, int, 0);
3868 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3869 module_param(debug, int, 0);
3870 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");