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
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 <net/net_namespace.h>
160 #include <net/checksum.h>
161 #include <net/ipv6.h>
162 #include <net/addrconf.h>
164 #include <net/xfrm.h>
166 #include <asm/byteorder.h>
167 #include <linux/rcupdate.h>
168 #include <linux/bitops.h>
169 #include <linux/io.h>
170 #include <linux/timex.h>
171 #include <linux/uaccess.h>
173 #include <asm/div64.h> /* do_div */
175 #define VERSION "2.74"
176 #define IP_NAME_SZ 32
177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
178 #define MPLS_STACK_BOTTOM htonl(0x00000100)
180 #define func_enter() pr_debug("entering %s\n", __func__);
182 /* Device flag bits */
183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
192 #define F_VID_RND (1<<9) /* Random VLAN ID */
193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
198 #define F_NODE (1<<15) /* Node memory alloc*/
200 /* Thread control flag bits */
201 #define T_STOP (1<<0) /* Stop run */
202 #define T_RUN (1<<1) /* Start run */
203 #define T_REMDEVALL (1<<2) /* Remove all devs */
204 #define T_REMDEV (1<<3) /* Remove one dev */
206 /* If lock -- can be removed after some work */
207 #define if_lock(t) spin_lock(&(t->if_lock));
208 #define if_unlock(t) spin_unlock(&(t->if_lock));
210 /* Used to help with determining the pkts on receive */
211 #define PKTGEN_MAGIC 0xbe9be955
212 #define PG_PROC_DIR "pktgen"
213 #define PGCTRL "pgctrl"
214 static struct proc_dir_entry *pg_proc_dir;
216 #define MAX_CFLOWS 65536
218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
225 struct xfrm_state *x;
231 #define F_INIT (1<<0) /* flow has been initialized */
235 * Try to keep frequent/infrequent used vars. separated.
237 struct proc_dir_entry *entry; /* proc file */
238 struct pktgen_thread *pg_thread;/* the owner */
239 struct list_head list; /* chaining in the thread's run-queue */
241 int running; /* if false, the test will stop */
243 /* If min != max, then we will either do a linear iteration, or
244 * we will do a random selection from within the range.
247 int removal_mark; /* non-zero => the device is marked for
248 * removal by worker thread */
250 int min_pkt_size; /* = ETH_ZLEN; */
251 int max_pkt_size; /* = ETH_ZLEN; */
252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
254 u64 delay; /* nano-seconds */
256 __u64 count; /* Default No packets to send */
257 __u64 sofar; /* How many pkts we've sent so far */
258 __u64 tx_bytes; /* How many bytes we've transmitted */
259 __u64 errors; /* Errors when trying to transmit, */
261 /* runtime counters relating to clone_skb */
263 __u64 allocated_skbs;
265 int last_ok; /* Was last skb sent?
266 * Or a failed transmit of some sort?
267 * This will keep sequence numbers in order
272 u64 idle_acc; /* nano-seconds */
277 * Use multiple SKBs during packet gen.
278 * If this number is greater than 1, then
279 * that many copies of the same packet will be
280 * sent before a new packet is allocated.
281 * If you want to send 1024 identical packets
282 * before creating a new packet,
283 * set clone_skb to 1024.
286 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
287 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
288 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 struct in6_addr in6_saddr;
292 struct in6_addr in6_daddr;
293 struct in6_addr cur_in6_daddr;
294 struct in6_addr cur_in6_saddr;
296 struct in6_addr min_in6_daddr;
297 struct in6_addr max_in6_daddr;
298 struct in6_addr min_in6_saddr;
299 struct in6_addr max_in6_saddr;
301 /* If we're doing ranges, random or incremental, then this
302 * defines the min/max for those ranges.
304 __be32 saddr_min; /* inclusive, source IP address */
305 __be32 saddr_max; /* exclusive, source IP address */
306 __be32 daddr_min; /* inclusive, dest IP address */
307 __be32 daddr_max; /* exclusive, dest IP address */
309 __u16 udp_src_min; /* inclusive, source UDP port */
310 __u16 udp_src_max; /* exclusive, source UDP port */
311 __u16 udp_dst_min; /* inclusive, dest UDP port */
312 __u16 udp_dst_max; /* exclusive, dest UDP port */
315 __u8 tos; /* six MSB of (former) IPv4 TOS
316 are for dscp codepoint */
317 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
318 (see RFC 3260, sec. 4) */
321 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
322 __be32 labels[MAX_MPLS_LABELS];
324 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
327 __u16 vlan_id; /* 0xffff means no vlan tag */
331 __u16 svlan_id; /* 0xffff means no svlan tag */
333 __u32 src_mac_count; /* How many MACs to iterate through */
334 __u32 dst_mac_count; /* How many MACs to iterate through */
336 unsigned char dst_mac[ETH_ALEN];
337 unsigned char src_mac[ETH_ALEN];
339 __u32 cur_dst_mac_offset;
340 __u32 cur_src_mac_offset;
352 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
354 We fill in SRC address later
355 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
359 __u16 pad; /* pad out the hh struct to an even 16 bytes */
361 struct sk_buff *skb; /* skb we are to transmit next, used for when we
362 * are transmitting the same one multiple times
364 struct net_device *odev; /* The out-going device.
365 * Note that the device should have it's
366 * pg_info pointer pointing back to this
368 * Set when the user specifies the out-going
369 * device name (not when the inject is
370 * started as it used to do.)
373 struct flow_state *flows;
374 unsigned cflows; /* Concurrent flows (config) */
375 unsigned lflow; /* Flow length (config) */
376 unsigned nflows; /* accumulated flows (stats) */
377 unsigned curfl; /* current sequenced flow (state)*/
381 int node; /* Memory node */
384 __u8 ipsmode; /* IPSEC mode (config) */
385 __u8 ipsproto; /* IPSEC type (config) */
397 struct pktgen_thread {
398 spinlock_t if_lock; /* for list of devices */
399 struct list_head if_list; /* All device here */
400 struct list_head th_list;
401 struct task_struct *tsk;
404 /* Field for thread to receive "posted" events terminate,
410 wait_queue_head_t queue;
411 struct completion start_done;
417 static inline ktime_t ktime_now(void)
422 return timespec_to_ktime(ts);
425 /* This works even if 32 bit because of careful byte order choice */
426 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
428 return cmp1.tv64 < cmp2.tv64;
431 static const char version[] =
432 "Packet Generator for packet performance testing. "
433 "Version: " VERSION "\n";
435 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
436 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
437 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
438 const char *ifname, bool exact);
439 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
440 static void pktgen_run_all_threads(void);
441 static void pktgen_reset_all_threads(void);
442 static void pktgen_stop_all_threads_ifs(void);
444 static void pktgen_stop(struct pktgen_thread *t);
445 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
447 static unsigned int scan_ip6(const char *s, char ip[16]);
448 static unsigned int fmt_ip6(char *s, const char ip[16]);
450 /* Module parameters, defaults. */
451 static int pg_count_d __read_mostly = 1000;
452 static int pg_delay_d __read_mostly;
453 static int pg_clone_skb_d __read_mostly;
454 static int debug __read_mostly;
456 static DEFINE_MUTEX(pktgen_thread_lock);
457 static LIST_HEAD(pktgen_threads);
459 static struct notifier_block pktgen_notifier_block = {
460 .notifier_call = pktgen_device_event,
464 * /proc handling functions
468 static int pgctrl_show(struct seq_file *seq, void *v)
470 seq_puts(seq, version);
474 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
475 size_t count, loff_t *ppos)
480 if (!capable(CAP_NET_ADMIN)) {
485 if (count > sizeof(data))
486 count = sizeof(data);
488 if (copy_from_user(data, buf, count)) {
492 data[count - 1] = 0; /* Make string */
494 if (!strcmp(data, "stop"))
495 pktgen_stop_all_threads_ifs();
497 else if (!strcmp(data, "start"))
498 pktgen_run_all_threads();
500 else if (!strcmp(data, "reset"))
501 pktgen_reset_all_threads();
504 pr_warning("Unknown command: %s\n", data);
512 static int pgctrl_open(struct inode *inode, struct file *file)
514 return single_open(file, pgctrl_show, PDE(inode)->data);
517 static const struct file_operations pktgen_fops = {
518 .owner = THIS_MODULE,
522 .write = pgctrl_write,
523 .release = single_release,
526 static int pktgen_if_show(struct seq_file *seq, void *v)
528 const struct pktgen_dev *pkt_dev = seq->private;
533 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
534 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
535 pkt_dev->max_pkt_size);
538 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
539 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
540 pkt_dev->clone_skb, pkt_dev->odevname);
542 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
546 " queue_map_min: %u queue_map_max: %u\n",
547 pkt_dev->queue_map_min,
548 pkt_dev->queue_map_max);
550 if (pkt_dev->flags & F_IPV6) {
551 char b1[128], b2[128], b3[128];
552 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
553 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
554 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
556 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
559 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
560 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
561 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
563 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
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 char b1[128], b2[128];
702 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
703 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
704 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
706 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
707 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
709 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
710 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
712 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
714 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
716 if (pkt_dev->result[0])
717 seq_printf(seq, "Result: %s\n", pkt_dev->result);
719 seq_printf(seq, "Result: Idle\n");
725 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
731 for (; i < maxlen; i++) {
735 if (get_user(c, &user_buffer[i]))
737 value = hex_to_bin(c);
746 static int count_trail_chars(const char __user * user_buffer,
751 for (i = 0; i < maxlen; i++) {
753 if (get_user(c, &user_buffer[i]))
771 static unsigned long num_arg(const char __user * user_buffer,
772 unsigned long maxlen, unsigned long *num)
777 for (i = 0; i < maxlen; i++) {
779 if (get_user(c, &user_buffer[i]))
781 if ((c >= '0') && (c <= '9')) {
790 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
794 for (i = 0; i < maxlen; i++) {
796 if (get_user(c, &user_buffer[i]))
814 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
821 pkt_dev->nr_labels = 0;
824 len = hex32_arg(&buffer[i], 8, &tmp);
827 pkt_dev->labels[n] = htonl(tmp);
828 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
829 pkt_dev->flags |= F_MPLS_RND;
831 if (get_user(c, &buffer[i]))
835 if (n >= MAX_MPLS_LABELS)
839 pkt_dev->nr_labels = n;
843 static ssize_t pktgen_if_write(struct file *file,
844 const char __user * user_buffer, size_t count,
847 struct seq_file *seq = file->private_data;
848 struct pktgen_dev *pkt_dev = seq->private;
850 char name[16], valstr[32];
851 unsigned long value = 0;
852 char *pg_result = NULL;
856 pg_result = &(pkt_dev->result[0]);
859 pr_warning("wrong command format\n");
864 tmp = count_trail_chars(user_buffer, max);
866 pr_warning("illegal format\n");
871 /* Read variable name */
873 len = strn_len(&user_buffer[i], sizeof(name) - 1);
877 memset(name, 0, sizeof(name));
878 if (copy_from_user(name, &user_buffer[i], len))
883 len = count_trail_chars(&user_buffer[i], max);
890 size_t copy = min(count, 1023);
892 if (copy_from_user(tb, user_buffer, copy))
895 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
896 (unsigned long)count, tb);
899 if (!strcmp(name, "min_pkt_size")) {
900 len = num_arg(&user_buffer[i], 10, &value);
905 if (value < 14 + 20 + 8)
907 if (value != pkt_dev->min_pkt_size) {
908 pkt_dev->min_pkt_size = value;
909 pkt_dev->cur_pkt_size = value;
911 sprintf(pg_result, "OK: min_pkt_size=%u",
912 pkt_dev->min_pkt_size);
916 if (!strcmp(name, "max_pkt_size")) {
917 len = num_arg(&user_buffer[i], 10, &value);
922 if (value < 14 + 20 + 8)
924 if (value != pkt_dev->max_pkt_size) {
925 pkt_dev->max_pkt_size = value;
926 pkt_dev->cur_pkt_size = value;
928 sprintf(pg_result, "OK: max_pkt_size=%u",
929 pkt_dev->max_pkt_size);
933 /* Shortcut for min = max */
935 if (!strcmp(name, "pkt_size")) {
936 len = num_arg(&user_buffer[i], 10, &value);
941 if (value < 14 + 20 + 8)
943 if (value != pkt_dev->min_pkt_size) {
944 pkt_dev->min_pkt_size = value;
945 pkt_dev->max_pkt_size = value;
946 pkt_dev->cur_pkt_size = value;
948 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
952 if (!strcmp(name, "debug")) {
953 len = num_arg(&user_buffer[i], 10, &value);
959 sprintf(pg_result, "OK: debug=%u", debug);
963 if (!strcmp(name, "frags")) {
964 len = num_arg(&user_buffer[i], 10, &value);
969 pkt_dev->nfrags = value;
970 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
973 if (!strcmp(name, "delay")) {
974 len = num_arg(&user_buffer[i], 10, &value);
979 if (value == 0x7FFFFFFF)
980 pkt_dev->delay = ULLONG_MAX;
982 pkt_dev->delay = (u64)value;
984 sprintf(pg_result, "OK: delay=%llu",
985 (unsigned long long) pkt_dev->delay);
988 if (!strcmp(name, "rate")) {
989 len = num_arg(&user_buffer[i], 10, &value);
996 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
998 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1000 sprintf(pg_result, "OK: rate=%lu", value);
1003 if (!strcmp(name, "ratep")) {
1004 len = num_arg(&user_buffer[i], 10, &value);
1011 pkt_dev->delay = NSEC_PER_SEC/value;
1013 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1015 sprintf(pg_result, "OK: rate=%lu", value);
1018 if (!strcmp(name, "udp_src_min")) {
1019 len = num_arg(&user_buffer[i], 10, &value);
1024 if (value != pkt_dev->udp_src_min) {
1025 pkt_dev->udp_src_min = value;
1026 pkt_dev->cur_udp_src = value;
1028 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1031 if (!strcmp(name, "udp_dst_min")) {
1032 len = num_arg(&user_buffer[i], 10, &value);
1037 if (value != pkt_dev->udp_dst_min) {
1038 pkt_dev->udp_dst_min = value;
1039 pkt_dev->cur_udp_dst = value;
1041 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1044 if (!strcmp(name, "udp_src_max")) {
1045 len = num_arg(&user_buffer[i], 10, &value);
1050 if (value != pkt_dev->udp_src_max) {
1051 pkt_dev->udp_src_max = value;
1052 pkt_dev->cur_udp_src = value;
1054 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1057 if (!strcmp(name, "udp_dst_max")) {
1058 len = num_arg(&user_buffer[i], 10, &value);
1063 if (value != pkt_dev->udp_dst_max) {
1064 pkt_dev->udp_dst_max = value;
1065 pkt_dev->cur_udp_dst = value;
1067 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1070 if (!strcmp(name, "clone_skb")) {
1071 len = num_arg(&user_buffer[i], 10, &value);
1076 pkt_dev->clone_skb = value;
1078 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1081 if (!strcmp(name, "count")) {
1082 len = num_arg(&user_buffer[i], 10, &value);
1087 pkt_dev->count = value;
1088 sprintf(pg_result, "OK: count=%llu",
1089 (unsigned long long)pkt_dev->count);
1092 if (!strcmp(name, "src_mac_count")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
1098 if (pkt_dev->src_mac_count != value) {
1099 pkt_dev->src_mac_count = value;
1100 pkt_dev->cur_src_mac_offset = 0;
1102 sprintf(pg_result, "OK: src_mac_count=%d",
1103 pkt_dev->src_mac_count);
1106 if (!strcmp(name, "dst_mac_count")) {
1107 len = num_arg(&user_buffer[i], 10, &value);
1112 if (pkt_dev->dst_mac_count != value) {
1113 pkt_dev->dst_mac_count = value;
1114 pkt_dev->cur_dst_mac_offset = 0;
1116 sprintf(pg_result, "OK: dst_mac_count=%d",
1117 pkt_dev->dst_mac_count);
1120 if (!strcmp(name, "node")) {
1121 len = num_arg(&user_buffer[i], 10, &value);
1127 if (node_possible(value)) {
1128 pkt_dev->node = value;
1129 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1132 sprintf(pg_result, "ERROR: node not possible");
1135 if (!strcmp(name, "flag")) {
1138 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1142 if (copy_from_user(f, &user_buffer[i], len))
1145 if (strcmp(f, "IPSRC_RND") == 0)
1146 pkt_dev->flags |= F_IPSRC_RND;
1148 else if (strcmp(f, "!IPSRC_RND") == 0)
1149 pkt_dev->flags &= ~F_IPSRC_RND;
1151 else if (strcmp(f, "TXSIZE_RND") == 0)
1152 pkt_dev->flags |= F_TXSIZE_RND;
1154 else if (strcmp(f, "!TXSIZE_RND") == 0)
1155 pkt_dev->flags &= ~F_TXSIZE_RND;
1157 else if (strcmp(f, "IPDST_RND") == 0)
1158 pkt_dev->flags |= F_IPDST_RND;
1160 else if (strcmp(f, "!IPDST_RND") == 0)
1161 pkt_dev->flags &= ~F_IPDST_RND;
1163 else if (strcmp(f, "UDPSRC_RND") == 0)
1164 pkt_dev->flags |= F_UDPSRC_RND;
1166 else if (strcmp(f, "!UDPSRC_RND") == 0)
1167 pkt_dev->flags &= ~F_UDPSRC_RND;
1169 else if (strcmp(f, "UDPDST_RND") == 0)
1170 pkt_dev->flags |= F_UDPDST_RND;
1172 else if (strcmp(f, "!UDPDST_RND") == 0)
1173 pkt_dev->flags &= ~F_UDPDST_RND;
1175 else if (strcmp(f, "MACSRC_RND") == 0)
1176 pkt_dev->flags |= F_MACSRC_RND;
1178 else if (strcmp(f, "!MACSRC_RND") == 0)
1179 pkt_dev->flags &= ~F_MACSRC_RND;
1181 else if (strcmp(f, "MACDST_RND") == 0)
1182 pkt_dev->flags |= F_MACDST_RND;
1184 else if (strcmp(f, "!MACDST_RND") == 0)
1185 pkt_dev->flags &= ~F_MACDST_RND;
1187 else if (strcmp(f, "MPLS_RND") == 0)
1188 pkt_dev->flags |= F_MPLS_RND;
1190 else if (strcmp(f, "!MPLS_RND") == 0)
1191 pkt_dev->flags &= ~F_MPLS_RND;
1193 else if (strcmp(f, "VID_RND") == 0)
1194 pkt_dev->flags |= F_VID_RND;
1196 else if (strcmp(f, "!VID_RND") == 0)
1197 pkt_dev->flags &= ~F_VID_RND;
1199 else if (strcmp(f, "SVID_RND") == 0)
1200 pkt_dev->flags |= F_SVID_RND;
1202 else if (strcmp(f, "!SVID_RND") == 0)
1203 pkt_dev->flags &= ~F_SVID_RND;
1205 else if (strcmp(f, "FLOW_SEQ") == 0)
1206 pkt_dev->flags |= F_FLOW_SEQ;
1208 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1209 pkt_dev->flags |= F_QUEUE_MAP_RND;
1211 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1212 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1214 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1215 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1217 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1218 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1220 else if (strcmp(f, "IPSEC") == 0)
1221 pkt_dev->flags |= F_IPSEC_ON;
1224 else if (strcmp(f, "!IPV6") == 0)
1225 pkt_dev->flags &= ~F_IPV6;
1227 else if (strcmp(f, "NODE_ALLOC") == 0)
1228 pkt_dev->flags |= F_NODE;
1230 else if (strcmp(f, "!NODE_ALLOC") == 0)
1231 pkt_dev->flags &= ~F_NODE;
1235 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1237 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1238 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1241 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1244 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1245 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1249 if (copy_from_user(buf, &user_buffer[i], len))
1252 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1253 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1254 strncpy(pkt_dev->dst_min, buf, len);
1255 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1256 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1259 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1262 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1265 if (!strcmp(name, "dst_max")) {
1266 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1271 if (copy_from_user(buf, &user_buffer[i], len))
1275 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1276 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1277 strncpy(pkt_dev->dst_max, buf, len);
1278 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1279 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1282 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1285 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1288 if (!strcmp(name, "dst6")) {
1289 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1293 pkt_dev->flags |= F_IPV6;
1295 if (copy_from_user(buf, &user_buffer[i], len))
1299 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1300 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1302 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1305 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1308 sprintf(pg_result, "OK: dst6=%s", buf);
1311 if (!strcmp(name, "dst6_min")) {
1312 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1316 pkt_dev->flags |= F_IPV6;
1318 if (copy_from_user(buf, &user_buffer[i], len))
1322 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1323 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1325 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1326 &pkt_dev->min_in6_daddr);
1328 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1331 sprintf(pg_result, "OK: dst6_min=%s", buf);
1334 if (!strcmp(name, "dst6_max")) {
1335 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1339 pkt_dev->flags |= F_IPV6;
1341 if (copy_from_user(buf, &user_buffer[i], len))
1345 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1346 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1349 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1352 sprintf(pg_result, "OK: dst6_max=%s", buf);
1355 if (!strcmp(name, "src6")) {
1356 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1360 pkt_dev->flags |= F_IPV6;
1362 if (copy_from_user(buf, &user_buffer[i], len))
1366 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1367 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1369 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1372 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1375 sprintf(pg_result, "OK: src6=%s", buf);
1378 if (!strcmp(name, "src_min")) {
1379 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1383 if (copy_from_user(buf, &user_buffer[i], len))
1386 if (strcmp(buf, pkt_dev->src_min) != 0) {
1387 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1388 strncpy(pkt_dev->src_min, buf, len);
1389 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1390 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1393 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1396 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1399 if (!strcmp(name, "src_max")) {
1400 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1404 if (copy_from_user(buf, &user_buffer[i], len))
1407 if (strcmp(buf, pkt_dev->src_max) != 0) {
1408 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1409 strncpy(pkt_dev->src_max, buf, len);
1410 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1411 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1414 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1417 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1420 if (!strcmp(name, "dst_mac")) {
1422 unsigned char old_dmac[ETH_ALEN];
1423 unsigned char *m = pkt_dev->dst_mac;
1424 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
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))
1435 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1438 value = hex_to_bin(*v);
1440 *m = *m * 16 + value;
1448 /* Set up Dest MAC */
1449 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1450 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1452 sprintf(pg_result, "OK: dstmac");
1455 if (!strcmp(name, "src_mac")) {
1457 unsigned char old_smac[ETH_ALEN];
1458 unsigned char *m = pkt_dev->src_mac;
1460 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1462 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1466 memset(valstr, 0, sizeof(valstr));
1467 if (copy_from_user(valstr, &user_buffer[i], len))
1471 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1474 value = hex_to_bin(*v);
1476 *m = *m * 16 + value;
1484 /* Set up Src MAC */
1485 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1486 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1488 sprintf(pg_result, "OK: srcmac");
1492 if (!strcmp(name, "clear_counters")) {
1493 pktgen_clear_counters(pkt_dev);
1494 sprintf(pg_result, "OK: Clearing counters.\n");
1498 if (!strcmp(name, "flows")) {
1499 len = num_arg(&user_buffer[i], 10, &value);
1504 if (value > MAX_CFLOWS)
1507 pkt_dev->cflows = value;
1508 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1512 if (!strcmp(name, "flowlen")) {
1513 len = num_arg(&user_buffer[i], 10, &value);
1518 pkt_dev->lflow = value;
1519 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1523 if (!strcmp(name, "queue_map_min")) {
1524 len = num_arg(&user_buffer[i], 5, &value);
1529 pkt_dev->queue_map_min = value;
1530 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1534 if (!strcmp(name, "queue_map_max")) {
1535 len = num_arg(&user_buffer[i], 5, &value);
1540 pkt_dev->queue_map_max = value;
1541 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1545 if (!strcmp(name, "mpls")) {
1548 len = get_labels(&user_buffer[i], pkt_dev);
1552 cnt = sprintf(pg_result, "OK: mpls=");
1553 for (n = 0; n < pkt_dev->nr_labels; n++)
1554 cnt += sprintf(pg_result + cnt,
1555 "%08x%s", ntohl(pkt_dev->labels[n]),
1556 n == pkt_dev->nr_labels-1 ? "" : ",");
1558 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1559 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1560 pkt_dev->svlan_id = 0xffff;
1563 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1568 if (!strcmp(name, "vlan_id")) {
1569 len = num_arg(&user_buffer[i], 4, &value);
1574 if (value <= 4095) {
1575 pkt_dev->vlan_id = value; /* turn on VLAN */
1578 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1580 if (debug && pkt_dev->nr_labels)
1581 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1583 pkt_dev->nr_labels = 0; /* turn off MPLS */
1584 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1586 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1587 pkt_dev->svlan_id = 0xffff;
1590 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1595 if (!strcmp(name, "vlan_p")) {
1596 len = num_arg(&user_buffer[i], 1, &value);
1601 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1602 pkt_dev->vlan_p = value;
1603 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1605 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1610 if (!strcmp(name, "vlan_cfi")) {
1611 len = num_arg(&user_buffer[i], 1, &value);
1616 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1617 pkt_dev->vlan_cfi = value;
1618 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1620 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1625 if (!strcmp(name, "svlan_id")) {
1626 len = num_arg(&user_buffer[i], 4, &value);
1631 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1632 pkt_dev->svlan_id = value; /* turn on SVLAN */
1635 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1637 if (debug && pkt_dev->nr_labels)
1638 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1640 pkt_dev->nr_labels = 0; /* turn off MPLS */
1641 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1643 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1644 pkt_dev->svlan_id = 0xffff;
1647 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1652 if (!strcmp(name, "svlan_p")) {
1653 len = num_arg(&user_buffer[i], 1, &value);
1658 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1659 pkt_dev->svlan_p = value;
1660 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1662 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1667 if (!strcmp(name, "svlan_cfi")) {
1668 len = num_arg(&user_buffer[i], 1, &value);
1673 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1674 pkt_dev->svlan_cfi = value;
1675 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1677 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1682 if (!strcmp(name, "tos")) {
1683 __u32 tmp_value = 0;
1684 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1690 pkt_dev->tos = tmp_value;
1691 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1693 sprintf(pg_result, "ERROR: tos must be 00-ff");
1698 if (!strcmp(name, "traffic_class")) {
1699 __u32 tmp_value = 0;
1700 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1706 pkt_dev->traffic_class = tmp_value;
1707 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1709 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1714 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1718 static int pktgen_if_open(struct inode *inode, struct file *file)
1720 return single_open(file, pktgen_if_show, PDE(inode)->data);
1723 static const struct file_operations pktgen_if_fops = {
1724 .owner = THIS_MODULE,
1725 .open = pktgen_if_open,
1727 .llseek = seq_lseek,
1728 .write = pktgen_if_write,
1729 .release = single_release,
1732 static int pktgen_thread_show(struct seq_file *seq, void *v)
1734 struct pktgen_thread *t = seq->private;
1735 const struct pktgen_dev *pkt_dev;
1739 seq_printf(seq, "Running: ");
1742 list_for_each_entry(pkt_dev, &t->if_list, list)
1743 if (pkt_dev->running)
1744 seq_printf(seq, "%s ", pkt_dev->odevname);
1746 seq_printf(seq, "\nStopped: ");
1748 list_for_each_entry(pkt_dev, &t->if_list, list)
1749 if (!pkt_dev->running)
1750 seq_printf(seq, "%s ", pkt_dev->odevname);
1753 seq_printf(seq, "\nResult: %s\n", t->result);
1755 seq_printf(seq, "\nResult: NA\n");
1762 static ssize_t pktgen_thread_write(struct file *file,
1763 const char __user * user_buffer,
1764 size_t count, loff_t * offset)
1766 struct seq_file *seq = file->private_data;
1767 struct pktgen_thread *t = seq->private;
1768 int i, max, len, ret;
1773 // sprintf(pg_result, "Wrong command format");
1778 len = count_trail_chars(user_buffer, max);
1784 /* Read variable name */
1786 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1790 memset(name, 0, sizeof(name));
1791 if (copy_from_user(name, &user_buffer[i], len))
1796 len = count_trail_chars(&user_buffer[i], max);
1803 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1804 name, (unsigned long)count);
1807 pr_err("ERROR: No thread\n");
1812 pg_result = &(t->result[0]);
1814 if (!strcmp(name, "add_device")) {
1817 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1822 if (copy_from_user(f, &user_buffer[i], len))
1825 mutex_lock(&pktgen_thread_lock);
1826 pktgen_add_device(t, f);
1827 mutex_unlock(&pktgen_thread_lock);
1829 sprintf(pg_result, "OK: add_device=%s", f);
1833 if (!strcmp(name, "rem_device_all")) {
1834 mutex_lock(&pktgen_thread_lock);
1835 t->control |= T_REMDEVALL;
1836 mutex_unlock(&pktgen_thread_lock);
1837 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1839 sprintf(pg_result, "OK: rem_device_all");
1843 if (!strcmp(name, "max_before_softirq")) {
1844 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1854 static int pktgen_thread_open(struct inode *inode, struct file *file)
1856 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1859 static const struct file_operations pktgen_thread_fops = {
1860 .owner = THIS_MODULE,
1861 .open = pktgen_thread_open,
1863 .llseek = seq_lseek,
1864 .write = pktgen_thread_write,
1865 .release = single_release,
1868 /* Think find or remove for NN */
1869 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1871 struct pktgen_thread *t;
1872 struct pktgen_dev *pkt_dev = NULL;
1873 bool exact = (remove == FIND);
1875 list_for_each_entry(t, &pktgen_threads, th_list) {
1876 pkt_dev = pktgen_find_dev(t, ifname, exact);
1880 pkt_dev->removal_mark = 1;
1881 t->control |= T_REMDEV;
1891 * mark a device for removal
1893 static void pktgen_mark_device(const char *ifname)
1895 struct pktgen_dev *pkt_dev = NULL;
1896 const int max_tries = 10, msec_per_try = 125;
1899 mutex_lock(&pktgen_thread_lock);
1900 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1904 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1905 if (pkt_dev == NULL)
1906 break; /* success */
1908 mutex_unlock(&pktgen_thread_lock);
1909 pr_debug("%s: waiting for %s to disappear....\n",
1911 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1912 mutex_lock(&pktgen_thread_lock);
1914 if (++i >= max_tries) {
1915 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1916 __func__, msec_per_try * i, ifname);
1922 mutex_unlock(&pktgen_thread_lock);
1925 static void pktgen_change_name(struct net_device *dev)
1927 struct pktgen_thread *t;
1929 list_for_each_entry(t, &pktgen_threads, th_list) {
1930 struct pktgen_dev *pkt_dev;
1932 list_for_each_entry(pkt_dev, &t->if_list, list) {
1933 if (pkt_dev->odev != dev)
1936 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1938 pkt_dev->entry = proc_create_data(dev->name, 0600,
1942 if (!pkt_dev->entry)
1943 pr_err("can't move proc entry for '%s'\n",
1950 static int pktgen_device_event(struct notifier_block *unused,
1951 unsigned long event, void *ptr)
1953 struct net_device *dev = ptr;
1955 if (!net_eq(dev_net(dev), &init_net))
1958 /* It is OK that we do not hold the group lock right now,
1959 * as we run under the RTNL lock.
1963 case NETDEV_CHANGENAME:
1964 pktgen_change_name(dev);
1967 case NETDEV_UNREGISTER:
1968 pktgen_mark_device(dev->name);
1975 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1981 for (i = 0; ifname[i] != '@'; i++) {
1989 return dev_get_by_name(&init_net, b);
1993 /* Associate pktgen_dev with a device. */
1995 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1997 struct net_device *odev;
2000 /* Clean old setups */
2001 if (pkt_dev->odev) {
2002 dev_put(pkt_dev->odev);
2003 pkt_dev->odev = NULL;
2006 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
2008 pr_err("no such netdevice: \"%s\"\n", ifname);
2012 if (odev->type != ARPHRD_ETHER) {
2013 pr_err("not an ethernet device: \"%s\"\n", ifname);
2015 } else if (!netif_running(odev)) {
2016 pr_err("device is down: \"%s\"\n", ifname);
2019 pkt_dev->odev = odev;
2027 /* Read pkt_dev from the interface and set up internal pktgen_dev
2028 * structure to have the right information to create/send packets
2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2034 if (!pkt_dev->odev) {
2035 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2036 sprintf(pkt_dev->result,
2037 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2041 /* make sure that we don't pick a non-existing transmit queue */
2042 ntxq = pkt_dev->odev->real_num_tx_queues;
2044 if (ntxq <= pkt_dev->queue_map_min) {
2045 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2046 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2048 pkt_dev->queue_map_min = ntxq - 1;
2050 if (pkt_dev->queue_map_max >= ntxq) {
2051 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2052 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2054 pkt_dev->queue_map_max = ntxq - 1;
2057 /* Default to the interface's mac if not explicitly set. */
2059 if (is_zero_ether_addr(pkt_dev->src_mac))
2060 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2062 /* Set up Dest MAC */
2063 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2065 /* Set up pkt size */
2066 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2068 if (pkt_dev->flags & F_IPV6) {
2070 * Skip this automatic address setting until locks or functions
2075 int i, set = 0, err = 1;
2076 struct inet6_dev *idev;
2078 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2079 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2087 * Use linklevel address if unconfigured.
2089 * use ipv6_get_lladdr if/when it's get exported
2093 idev = __in6_dev_get(pkt_dev->odev);
2095 struct inet6_ifaddr *ifp;
2097 read_lock_bh(&idev->lock);
2098 for (ifp = idev->addr_list; ifp;
2099 ifp = ifp->if_next) {
2100 if (ifp->scope == IFA_LINK &&
2101 !(ifp->flags & IFA_F_TENTATIVE)) {
2102 ipv6_addr_copy(&pkt_dev->
2109 read_unlock_bh(&idev->lock);
2113 pr_err("ERROR: IPv6 link address not available\n");
2117 pkt_dev->saddr_min = 0;
2118 pkt_dev->saddr_max = 0;
2119 if (strlen(pkt_dev->src_min) == 0) {
2121 struct in_device *in_dev;
2124 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2126 if (in_dev->ifa_list) {
2127 pkt_dev->saddr_min =
2128 in_dev->ifa_list->ifa_address;
2129 pkt_dev->saddr_max = pkt_dev->saddr_min;
2134 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2135 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2138 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2139 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2141 /* Initialize current values. */
2142 pkt_dev->cur_dst_mac_offset = 0;
2143 pkt_dev->cur_src_mac_offset = 0;
2144 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2145 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2146 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2147 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2148 pkt_dev->nflows = 0;
2152 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2154 ktime_t start_time, end_time;
2156 struct hrtimer_sleeper t;
2158 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2159 hrtimer_set_expires(&t.timer, spin_until);
2161 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2162 if (remaining <= 0) {
2163 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2167 start_time = ktime_now();
2168 if (remaining < 100000)
2169 ndelay(remaining); /* really small just spin */
2171 /* see do_nanosleep */
2172 hrtimer_init_sleeper(&t, current);
2174 set_current_state(TASK_INTERRUPTIBLE);
2175 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2176 if (!hrtimer_active(&t.timer))
2182 hrtimer_cancel(&t.timer);
2183 } while (t.task && pkt_dev->running && !signal_pending(current));
2184 __set_current_state(TASK_RUNNING);
2186 end_time = ktime_now();
2188 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2189 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2192 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2194 pkt_dev->pkt_overhead = 0;
2195 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2196 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2197 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2200 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2202 return !!(pkt_dev->flows[flow].flags & F_INIT);
2205 static inline int f_pick(struct pktgen_dev *pkt_dev)
2207 int flow = pkt_dev->curfl;
2209 if (pkt_dev->flags & F_FLOW_SEQ) {
2210 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2212 pkt_dev->flows[flow].count = 0;
2213 pkt_dev->flows[flow].flags = 0;
2214 pkt_dev->curfl += 1;
2215 if (pkt_dev->curfl >= pkt_dev->cflows)
2216 pkt_dev->curfl = 0; /*reset */
2219 flow = random32() % pkt_dev->cflows;
2220 pkt_dev->curfl = flow;
2222 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2223 pkt_dev->flows[flow].count = 0;
2224 pkt_dev->flows[flow].flags = 0;
2228 return pkt_dev->curfl;
2233 /* If there was already an IPSEC SA, we keep it as is, else
2234 * we go look for it ...
2236 #define DUMMY_MARK 0
2237 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2239 struct xfrm_state *x = pkt_dev->flows[flow].x;
2241 /*slow path: we dont already have xfrm_state*/
2242 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2243 (xfrm_address_t *)&pkt_dev->cur_daddr,
2244 (xfrm_address_t *)&pkt_dev->cur_saddr,
2247 pkt_dev->ipsproto, 0);
2249 pkt_dev->flows[flow].x = x;
2250 set_pkt_overhead(pkt_dev);
2251 pkt_dev->pkt_overhead += x->props.header_len;
2257 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2260 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2261 pkt_dev->cur_queue_map = smp_processor_id();
2263 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2265 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2267 (pkt_dev->queue_map_max -
2268 pkt_dev->queue_map_min + 1)
2269 + pkt_dev->queue_map_min;
2271 t = pkt_dev->cur_queue_map + 1;
2272 if (t > pkt_dev->queue_map_max)
2273 t = pkt_dev->queue_map_min;
2275 pkt_dev->cur_queue_map = t;
2277 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2280 /* Increment/randomize headers according to flags and current values
2281 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2283 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2289 if (pkt_dev->cflows)
2290 flow = f_pick(pkt_dev);
2292 /* Deal with source MAC */
2293 if (pkt_dev->src_mac_count > 1) {
2297 if (pkt_dev->flags & F_MACSRC_RND)
2298 mc = random32() % pkt_dev->src_mac_count;
2300 mc = pkt_dev->cur_src_mac_offset++;
2301 if (pkt_dev->cur_src_mac_offset >=
2302 pkt_dev->src_mac_count)
2303 pkt_dev->cur_src_mac_offset = 0;
2306 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2307 pkt_dev->hh[11] = tmp;
2308 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2309 pkt_dev->hh[10] = tmp;
2310 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2311 pkt_dev->hh[9] = tmp;
2312 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2313 pkt_dev->hh[8] = tmp;
2314 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2315 pkt_dev->hh[7] = tmp;
2318 /* Deal with Destination MAC */
2319 if (pkt_dev->dst_mac_count > 1) {
2323 if (pkt_dev->flags & F_MACDST_RND)
2324 mc = random32() % pkt_dev->dst_mac_count;
2327 mc = pkt_dev->cur_dst_mac_offset++;
2328 if (pkt_dev->cur_dst_mac_offset >=
2329 pkt_dev->dst_mac_count) {
2330 pkt_dev->cur_dst_mac_offset = 0;
2334 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2335 pkt_dev->hh[5] = tmp;
2336 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2337 pkt_dev->hh[4] = tmp;
2338 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2339 pkt_dev->hh[3] = tmp;
2340 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2341 pkt_dev->hh[2] = tmp;
2342 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2343 pkt_dev->hh[1] = tmp;
2346 if (pkt_dev->flags & F_MPLS_RND) {
2348 for (i = 0; i < pkt_dev->nr_labels; i++)
2349 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2350 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2351 ((__force __be32)random32() &
2355 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2356 pkt_dev->vlan_id = random32() & (4096-1);
2359 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2360 pkt_dev->svlan_id = random32() & (4096 - 1);
2363 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2364 if (pkt_dev->flags & F_UDPSRC_RND)
2365 pkt_dev->cur_udp_src = random32() %
2366 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2367 + pkt_dev->udp_src_min;
2370 pkt_dev->cur_udp_src++;
2371 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2372 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2376 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2377 if (pkt_dev->flags & F_UDPDST_RND) {
2378 pkt_dev->cur_udp_dst = random32() %
2379 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2380 + pkt_dev->udp_dst_min;
2382 pkt_dev->cur_udp_dst++;
2383 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2384 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2388 if (!(pkt_dev->flags & F_IPV6)) {
2390 imn = ntohl(pkt_dev->saddr_min);
2391 imx = ntohl(pkt_dev->saddr_max);
2394 if (pkt_dev->flags & F_IPSRC_RND)
2395 t = random32() % (imx - imn) + imn;
2397 t = ntohl(pkt_dev->cur_saddr);
2403 pkt_dev->cur_saddr = htonl(t);
2406 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2407 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2409 imn = ntohl(pkt_dev->daddr_min);
2410 imx = ntohl(pkt_dev->daddr_max);
2414 if (pkt_dev->flags & F_IPDST_RND) {
2416 t = random32() % (imx - imn) + imn;
2419 while (ipv4_is_loopback(s) ||
2420 ipv4_is_multicast(s) ||
2421 ipv4_is_lbcast(s) ||
2422 ipv4_is_zeronet(s) ||
2423 ipv4_is_local_multicast(s)) {
2424 t = random32() % (imx - imn) + imn;
2427 pkt_dev->cur_daddr = s;
2429 t = ntohl(pkt_dev->cur_daddr);
2434 pkt_dev->cur_daddr = htonl(t);
2437 if (pkt_dev->cflows) {
2438 pkt_dev->flows[flow].flags |= F_INIT;
2439 pkt_dev->flows[flow].cur_daddr =
2442 if (pkt_dev->flags & F_IPSEC_ON)
2443 get_ipsec_sa(pkt_dev, flow);
2448 } else { /* IPV6 * */
2450 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2451 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2452 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2453 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2457 /* Only random destinations yet */
2459 for (i = 0; i < 4; i++) {
2460 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2461 (((__force __be32)random32() |
2462 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2463 pkt_dev->max_in6_daddr.s6_addr32[i]);
2468 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2470 if (pkt_dev->flags & F_TXSIZE_RND) {
2472 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2473 + pkt_dev->min_pkt_size;
2475 t = pkt_dev->cur_pkt_size + 1;
2476 if (t > pkt_dev->max_pkt_size)
2477 t = pkt_dev->min_pkt_size;
2479 pkt_dev->cur_pkt_size = t;
2482 set_cur_queue_map(pkt_dev);
2484 pkt_dev->flows[flow].count++;
2489 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2491 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2497 /* XXX: we dont support tunnel mode for now until
2498 * we resolve the dst issue */
2499 if (x->props.mode != XFRM_MODE_TRANSPORT)
2502 spin_lock(&x->lock);
2505 err = x->outer_mode->output(x, skb);
2508 err = x->type->output(x, skb);
2512 x->curlft.bytes += skb->len;
2513 x->curlft.packets++;
2515 spin_unlock(&x->lock);
2519 static void free_SAs(struct pktgen_dev *pkt_dev)
2521 if (pkt_dev->cflows) {
2522 /* let go of the SAs if we have them */
2524 for (i = 0; i < pkt_dev->cflows; i++) {
2525 struct xfrm_state *x = pkt_dev->flows[i].x;
2528 pkt_dev->flows[i].x = NULL;
2534 static int process_ipsec(struct pktgen_dev *pkt_dev,
2535 struct sk_buff *skb, __be16 protocol)
2537 if (pkt_dev->flags & F_IPSEC_ON) {
2538 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2543 nhead = x->props.header_len - skb_headroom(skb);
2545 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2547 pr_err("Error expanding ipsec packet %d\n",
2553 /* ipsec is not expecting ll header */
2554 skb_pull(skb, ETH_HLEN);
2555 ret = pktgen_output_ipsec(skb, pkt_dev);
2557 pr_err("Error creating ipsec packet %d\n", ret);
2561 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2562 memcpy(eth, pkt_dev->hh, 12);
2563 *(u16 *) ð[12] = protocol;
2573 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2576 for (i = 0; i < pkt_dev->nr_labels; i++)
2577 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2580 *mpls |= MPLS_STACK_BOTTOM;
2583 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2586 return htons(id | (cfi << 12) | (prio << 13));
2589 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2590 struct pktgen_dev *pkt_dev)
2592 struct sk_buff *skb = NULL;
2594 struct udphdr *udph;
2597 struct pktgen_hdr *pgh = NULL;
2598 __be16 protocol = htons(ETH_P_IP);
2600 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2601 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2602 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2603 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2606 if (pkt_dev->nr_labels)
2607 protocol = htons(ETH_P_MPLS_UC);
2609 if (pkt_dev->vlan_id != 0xffff)
2610 protocol = htons(ETH_P_8021Q);
2612 /* Update any of the values, used when we're incrementing various
2615 queue_map = pkt_dev->cur_queue_map;
2616 mod_cur_headers(pkt_dev);
2618 datalen = (odev->hard_header_len + 16) & ~0xf;
2620 if (pkt_dev->flags & F_NODE) {
2623 if (pkt_dev->node >= 0)
2624 node = pkt_dev->node;
2626 node = numa_node_id();
2628 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2629 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2631 skb_reserve(skb, NET_SKB_PAD);
2636 skb = __netdev_alloc_skb(odev,
2637 pkt_dev->cur_pkt_size + 64
2638 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2641 sprintf(pkt_dev->result, "No memory");
2645 skb_reserve(skb, datalen);
2647 /* Reserve for ethernet and IP header */
2648 eth = (__u8 *) skb_push(skb, 14);
2649 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2650 if (pkt_dev->nr_labels)
2651 mpls_push(mpls, pkt_dev);
2653 if (pkt_dev->vlan_id != 0xffff) {
2654 if (pkt_dev->svlan_id != 0xffff) {
2655 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2656 *svlan_tci = build_tci(pkt_dev->svlan_id,
2659 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2660 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2662 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2663 *vlan_tci = build_tci(pkt_dev->vlan_id,
2666 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2667 *vlan_encapsulated_proto = htons(ETH_P_IP);
2670 skb->network_header = skb->tail;
2671 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2672 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2673 skb_set_queue_mapping(skb, queue_map);
2675 udph = udp_hdr(skb);
2677 memcpy(eth, pkt_dev->hh, 12);
2678 *(__be16 *) & eth[12] = protocol;
2680 /* Eth + IPh + UDPh + mpls */
2681 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2682 pkt_dev->pkt_overhead;
2683 if (datalen < sizeof(struct pktgen_hdr))
2684 datalen = sizeof(struct pktgen_hdr);
2686 udph->source = htons(pkt_dev->cur_udp_src);
2687 udph->dest = htons(pkt_dev->cur_udp_dst);
2688 udph->len = htons(datalen + 8); /* DATA + udphdr */
2689 udph->check = 0; /* No checksum */
2694 iph->tos = pkt_dev->tos;
2695 iph->protocol = IPPROTO_UDP; /* UDP */
2696 iph->saddr = pkt_dev->cur_saddr;
2697 iph->daddr = pkt_dev->cur_daddr;
2698 iph->id = htons(pkt_dev->ip_id);
2701 iplen = 20 + 8 + datalen;
2702 iph->tot_len = htons(iplen);
2704 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2705 skb->protocol = protocol;
2706 skb->mac_header = (skb->network_header - ETH_HLEN -
2707 pkt_dev->pkt_overhead);
2709 skb->pkt_type = PACKET_HOST;
2711 if (pkt_dev->nfrags <= 0) {
2712 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2713 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2715 int frags = pkt_dev->nfrags;
2718 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2720 if (frags > MAX_SKB_FRAGS)
2721 frags = MAX_SKB_FRAGS;
2722 if (datalen > frags * PAGE_SIZE) {
2723 len = datalen - frags * PAGE_SIZE;
2724 memset(skb_put(skb, len), 0, len);
2725 datalen = frags * PAGE_SIZE;
2729 while (datalen > 0) {
2730 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2731 skb_shinfo(skb)->frags[i].page = page;
2732 skb_shinfo(skb)->frags[i].page_offset = 0;
2733 skb_shinfo(skb)->frags[i].size =
2734 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2735 datalen -= skb_shinfo(skb)->frags[i].size;
2736 skb->len += skb_shinfo(skb)->frags[i].size;
2737 skb->data_len += skb_shinfo(skb)->frags[i].size;
2739 skb_shinfo(skb)->nr_frags = i;
2748 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2752 skb_shinfo(skb)->frags[i - 1].size -= rem;
2754 skb_shinfo(skb)->frags[i] =
2755 skb_shinfo(skb)->frags[i - 1];
2756 get_page(skb_shinfo(skb)->frags[i].page);
2757 skb_shinfo(skb)->frags[i].page =
2758 skb_shinfo(skb)->frags[i - 1].page;
2759 skb_shinfo(skb)->frags[i].page_offset +=
2760 skb_shinfo(skb)->frags[i - 1].size;
2761 skb_shinfo(skb)->frags[i].size = rem;
2763 skb_shinfo(skb)->nr_frags = i;
2767 /* Stamp the time, and sequence number,
2768 * convert them to network byte order
2771 struct timeval timestamp;
2773 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2774 pgh->seq_num = htonl(pkt_dev->seq_num);
2776 do_gettimeofday(×tamp);
2777 pgh->tv_sec = htonl(timestamp.tv_sec);
2778 pgh->tv_usec = htonl(timestamp.tv_usec);
2782 if (!process_ipsec(pkt_dev, skb, protocol))
2790 * scan_ip6, fmt_ip taken from dietlibc-0.21
2793 * Slightly modified for kernel.
2794 * Should be candidate for net/ipv4/utils.c
2798 static unsigned int scan_ip6(const char *s, char ip[16])
2801 unsigned int len = 0;
2804 unsigned int prefixlen = 0;
2805 unsigned int suffixlen = 0;
2809 for (i = 0; i < 16; i++)
2815 if (s[1] == ':') { /* Found "::", skip to part 2 */
2823 u = simple_strtoul(s, &pos, 16);
2827 if (prefixlen == 12 && s[i] == '.') {
2829 /* the last 4 bytes may be written as IPv4 address */
2832 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2835 ip[prefixlen++] = (u >> 8);
2836 ip[prefixlen++] = (u & 255);
2839 if (prefixlen == 16)
2843 /* part 2, after "::" */
2850 } else if (suffixlen != 0)
2853 u = simple_strtol(s, &pos, 16);
2860 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2862 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2868 suffix[suffixlen++] = (u >> 8);
2869 suffix[suffixlen++] = (u & 255);
2872 if (prefixlen + suffixlen == 16)
2875 for (i = 0; i < suffixlen; i++)
2876 ip[16 - suffixlen + i] = suffix[i];
2880 static char tohex(char hexdigit)
2882 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2885 static int fmt_xlong(char *s, unsigned int i)
2888 *s = tohex((i >> 12) & 0xf);
2889 if (s != bak || *s != '0')
2891 *s = tohex((i >> 8) & 0xf);
2892 if (s != bak || *s != '0')
2894 *s = tohex((i >> 4) & 0xf);
2895 if (s != bak || *s != '0')
2897 *s = tohex(i & 0xf);
2901 static unsigned int fmt_ip6(char *s, const char ip[16])
2906 unsigned int compressing;
2911 for (j = 0; j < 16; j += 2) {
2913 #ifdef V4MAPPEDPREFIX
2914 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2915 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2920 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2921 (unsigned long)(unsigned char)ip[j + 1];
2936 i = fmt_xlong(s, temp);
2953 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2954 struct pktgen_dev *pkt_dev)
2956 struct sk_buff *skb = NULL;
2958 struct udphdr *udph;
2960 struct ipv6hdr *iph;
2961 struct pktgen_hdr *pgh = NULL;
2962 __be16 protocol = htons(ETH_P_IPV6);
2964 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2965 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2966 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2967 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2970 if (pkt_dev->nr_labels)
2971 protocol = htons(ETH_P_MPLS_UC);
2973 if (pkt_dev->vlan_id != 0xffff)
2974 protocol = htons(ETH_P_8021Q);
2976 /* Update any of the values, used when we're incrementing various
2979 queue_map = pkt_dev->cur_queue_map;
2980 mod_cur_headers(pkt_dev);
2982 skb = __netdev_alloc_skb(odev,
2983 pkt_dev->cur_pkt_size + 64
2984 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2986 sprintf(pkt_dev->result, "No memory");
2990 skb_reserve(skb, 16);
2992 /* Reserve for ethernet and IP header */
2993 eth = (__u8 *) skb_push(skb, 14);
2994 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2995 if (pkt_dev->nr_labels)
2996 mpls_push(mpls, pkt_dev);
2998 if (pkt_dev->vlan_id != 0xffff) {
2999 if (pkt_dev->svlan_id != 0xffff) {
3000 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3001 *svlan_tci = build_tci(pkt_dev->svlan_id,
3004 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3005 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
3007 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3008 *vlan_tci = build_tci(pkt_dev->vlan_id,
3011 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3012 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
3015 skb->network_header = skb->tail;
3016 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
3017 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
3018 skb_set_queue_mapping(skb, queue_map);
3019 iph = ipv6_hdr(skb);
3020 udph = udp_hdr(skb);
3022 memcpy(eth, pkt_dev->hh, 12);
3023 *(__be16 *) ð[12] = protocol;
3025 /* Eth + IPh + UDPh + mpls */
3026 datalen = pkt_dev->cur_pkt_size - 14 -
3027 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3028 pkt_dev->pkt_overhead;
3030 if (datalen < sizeof(struct pktgen_hdr)) {
3031 datalen = sizeof(struct pktgen_hdr);
3032 if (net_ratelimit())
3033 pr_info("increased datalen to %d\n", datalen);
3036 udph->source = htons(pkt_dev->cur_udp_src);
3037 udph->dest = htons(pkt_dev->cur_udp_dst);
3038 udph->len = htons(datalen + sizeof(struct udphdr));
3039 udph->check = 0; /* No checksum */
3041 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3043 if (pkt_dev->traffic_class) {
3044 /* Version + traffic class + flow (0) */
3045 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3048 iph->hop_limit = 32;
3050 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
3051 iph->nexthdr = IPPROTO_UDP;
3053 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
3054 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
3056 skb->mac_header = (skb->network_header - ETH_HLEN -
3057 pkt_dev->pkt_overhead);
3058 skb->protocol = protocol;
3060 skb->pkt_type = PACKET_HOST;
3062 if (pkt_dev->nfrags <= 0)
3063 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3065 int frags = pkt_dev->nfrags;
3068 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3070 if (frags > MAX_SKB_FRAGS)
3071 frags = MAX_SKB_FRAGS;
3072 if (datalen > frags * PAGE_SIZE) {
3073 skb_put(skb, datalen - frags * PAGE_SIZE);
3074 datalen = frags * PAGE_SIZE;
3078 while (datalen > 0) {
3079 struct page *page = alloc_pages(GFP_KERNEL, 0);
3080 skb_shinfo(skb)->frags[i].page = page;
3081 skb_shinfo(skb)->frags[i].page_offset = 0;
3082 skb_shinfo(skb)->frags[i].size =
3083 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3084 datalen -= skb_shinfo(skb)->frags[i].size;
3085 skb->len += skb_shinfo(skb)->frags[i].size;
3086 skb->data_len += skb_shinfo(skb)->frags[i].size;
3088 skb_shinfo(skb)->nr_frags = i;
3097 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3101 skb_shinfo(skb)->frags[i - 1].size -= rem;
3103 skb_shinfo(skb)->frags[i] =
3104 skb_shinfo(skb)->frags[i - 1];
3105 get_page(skb_shinfo(skb)->frags[i].page);
3106 skb_shinfo(skb)->frags[i].page =
3107 skb_shinfo(skb)->frags[i - 1].page;
3108 skb_shinfo(skb)->frags[i].page_offset +=
3109 skb_shinfo(skb)->frags[i - 1].size;
3110 skb_shinfo(skb)->frags[i].size = rem;
3112 skb_shinfo(skb)->nr_frags = i;
3116 /* Stamp the time, and sequence number,
3117 * convert them to network byte order
3118 * should we update cloned packets too ?
3121 struct timeval timestamp;
3123 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3124 pgh->seq_num = htonl(pkt_dev->seq_num);
3126 do_gettimeofday(×tamp);
3127 pgh->tv_sec = htonl(timestamp.tv_sec);
3128 pgh->tv_usec = htonl(timestamp.tv_usec);
3130 /* pkt_dev->seq_num++; FF: you really mean this? */
3135 static struct sk_buff *fill_packet(struct net_device *odev,
3136 struct pktgen_dev *pkt_dev)
3138 if (pkt_dev->flags & F_IPV6)
3139 return fill_packet_ipv6(odev, pkt_dev);
3141 return fill_packet_ipv4(odev, pkt_dev);
3144 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3146 pkt_dev->seq_num = 1;
3147 pkt_dev->idle_acc = 0;
3149 pkt_dev->tx_bytes = 0;
3150 pkt_dev->errors = 0;
3153 /* Set up structure for sending pkts, clear counters */
3155 static void pktgen_run(struct pktgen_thread *t)
3157 struct pktgen_dev *pkt_dev;
3163 list_for_each_entry(pkt_dev, &t->if_list, list) {
3166 * setup odev and create initial packet.
3168 pktgen_setup_inject(pkt_dev);
3170 if (pkt_dev->odev) {
3171 pktgen_clear_counters(pkt_dev);
3172 pkt_dev->running = 1; /* Cranke yeself! */
3173 pkt_dev->skb = NULL;
3174 pkt_dev->started_at =
3175 pkt_dev->next_tx = ktime_now();
3177 set_pkt_overhead(pkt_dev);
3179 strcpy(pkt_dev->result, "Starting");
3182 strcpy(pkt_dev->result, "Error starting");
3186 t->control &= ~(T_STOP);
3189 static void pktgen_stop_all_threads_ifs(void)
3191 struct pktgen_thread *t;
3195 mutex_lock(&pktgen_thread_lock);
3197 list_for_each_entry(t, &pktgen_threads, th_list)
3198 t->control |= T_STOP;
3200 mutex_unlock(&pktgen_thread_lock);
3203 static int thread_is_running(const struct pktgen_thread *t)
3205 const struct pktgen_dev *pkt_dev;
3207 list_for_each_entry(pkt_dev, &t->if_list, list)
3208 if (pkt_dev->running)
3213 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3217 while (thread_is_running(t)) {
3221 msleep_interruptible(100);
3223 if (signal_pending(current))
3233 static int pktgen_wait_all_threads_run(void)
3235 struct pktgen_thread *t;
3238 mutex_lock(&pktgen_thread_lock);
3240 list_for_each_entry(t, &pktgen_threads, th_list) {
3241 sig = pktgen_wait_thread_run(t);
3247 list_for_each_entry(t, &pktgen_threads, th_list)
3248 t->control |= (T_STOP);
3250 mutex_unlock(&pktgen_thread_lock);
3254 static void pktgen_run_all_threads(void)
3256 struct pktgen_thread *t;
3260 mutex_lock(&pktgen_thread_lock);
3262 list_for_each_entry(t, &pktgen_threads, th_list)
3263 t->control |= (T_RUN);
3265 mutex_unlock(&pktgen_thread_lock);
3267 /* Propagate thread->control */
3268 schedule_timeout_interruptible(msecs_to_jiffies(125));
3270 pktgen_wait_all_threads_run();
3273 static void pktgen_reset_all_threads(void)
3275 struct pktgen_thread *t;
3279 mutex_lock(&pktgen_thread_lock);
3281 list_for_each_entry(t, &pktgen_threads, th_list)
3282 t->control |= (T_REMDEVALL);
3284 mutex_unlock(&pktgen_thread_lock);
3286 /* Propagate thread->control */
3287 schedule_timeout_interruptible(msecs_to_jiffies(125));
3289 pktgen_wait_all_threads_run();
3292 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3294 __u64 bps, mbps, pps;
3295 char *p = pkt_dev->result;
3296 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3297 pkt_dev->started_at);
3298 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3300 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3301 (unsigned long long)ktime_to_us(elapsed),
3302 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3303 (unsigned long long)ktime_to_us(idle),
3304 (unsigned long long)pkt_dev->sofar,
3305 pkt_dev->cur_pkt_size, nr_frags);
3307 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3308 ktime_to_ns(elapsed));
3310 bps = pps * 8 * pkt_dev->cur_pkt_size;
3313 do_div(mbps, 1000000);
3314 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3315 (unsigned long long)pps,
3316 (unsigned long long)mbps,
3317 (unsigned long long)bps,
3318 (unsigned long long)pkt_dev->errors);
3321 /* Set stopped-at timer, remove from running list, do counters & statistics */
3322 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3324 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3326 if (!pkt_dev->running) {
3327 pr_warning("interface: %s is already stopped\n",
3332 kfree_skb(pkt_dev->skb);
3333 pkt_dev->skb = NULL;
3334 pkt_dev->stopped_at = ktime_now();
3335 pkt_dev->running = 0;
3337 show_results(pkt_dev, nr_frags);
3342 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3344 struct pktgen_dev *pkt_dev, *best = NULL;
3348 list_for_each_entry(pkt_dev, &t->if_list, list) {
3349 if (!pkt_dev->running)
3353 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3360 static void pktgen_stop(struct pktgen_thread *t)
3362 struct pktgen_dev *pkt_dev;
3368 list_for_each_entry(pkt_dev, &t->if_list, list) {
3369 pktgen_stop_device(pkt_dev);
3376 * one of our devices needs to be removed - find it
3379 static void pktgen_rem_one_if(struct pktgen_thread *t)
3381 struct list_head *q, *n;
3382 struct pktgen_dev *cur;
3388 list_for_each_safe(q, n, &t->if_list) {
3389 cur = list_entry(q, struct pktgen_dev, list);
3391 if (!cur->removal_mark)
3394 kfree_skb(cur->skb);
3397 pktgen_remove_device(t, cur);
3405 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3407 struct list_head *q, *n;
3408 struct pktgen_dev *cur;
3412 /* Remove all devices, free mem */
3416 list_for_each_safe(q, n, &t->if_list) {
3417 cur = list_entry(q, struct pktgen_dev, list);
3419 kfree_skb(cur->skb);
3422 pktgen_remove_device(t, cur);
3428 static void pktgen_rem_thread(struct pktgen_thread *t)
3430 /* Remove from the thread list */
3432 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3434 mutex_lock(&pktgen_thread_lock);
3436 list_del(&t->th_list);
3438 mutex_unlock(&pktgen_thread_lock);
3441 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3443 ktime_t idle_start = ktime_now();
3445 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3448 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3450 ktime_t idle_start = ktime_now();
3452 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3453 if (signal_pending(current))
3457 pktgen_resched(pkt_dev);
3461 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3464 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3466 struct net_device *odev = pkt_dev->odev;
3467 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3468 = odev->netdev_ops->ndo_start_xmit;
3469 struct netdev_queue *txq;
3473 /* If device is offline, then don't send */
3474 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3475 pktgen_stop_device(pkt_dev);
3479 /* This is max DELAY, this has special meaning of
3482 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3483 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3487 /* If no skb or clone count exhausted then get new one */
3488 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3489 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3490 /* build a new pkt */
3491 kfree_skb(pkt_dev->skb);
3493 pkt_dev->skb = fill_packet(odev, pkt_dev);
3494 if (pkt_dev->skb == NULL) {
3495 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3497 pkt_dev->clone_count--; /* back out increment, OOM */
3500 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3501 pkt_dev->allocated_skbs++;
3502 pkt_dev->clone_count = 0; /* reset counter */
3505 if (pkt_dev->delay && pkt_dev->last_ok)
3506 spin(pkt_dev, pkt_dev->next_tx);
3508 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3509 txq = netdev_get_tx_queue(odev, queue_map);
3511 __netif_tx_lock_bh(txq);
3513 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3514 ret = NETDEV_TX_BUSY;
3515 pkt_dev->last_ok = 0;
3518 atomic_inc(&(pkt_dev->skb->users));
3519 ret = (*xmit)(pkt_dev->skb, odev);
3523 txq_trans_update(txq);
3524 pkt_dev->last_ok = 1;
3527 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3531 case NET_XMIT_POLICED:
3532 /* skb has been consumed */
3535 default: /* Drivers are not supposed to return other values! */
3536 if (net_ratelimit())
3537 pr_info("pktgen: %s xmit error: %d\n",
3538 pkt_dev->odevname, ret);
3541 case NETDEV_TX_LOCKED:
3542 case NETDEV_TX_BUSY:
3543 /* Retry it next time */
3544 atomic_dec(&(pkt_dev->skb->users));
3545 pkt_dev->last_ok = 0;
3548 __netif_tx_unlock_bh(txq);
3550 /* If pkt_dev->count is zero, then run forever */
3551 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3552 pktgen_wait_for_skb(pkt_dev);
3554 /* Done with this */
3555 pktgen_stop_device(pkt_dev);
3560 * Main loop of the thread goes here
3563 static int pktgen_thread_worker(void *arg)
3566 struct pktgen_thread *t = arg;
3567 struct pktgen_dev *pkt_dev = NULL;
3570 BUG_ON(smp_processor_id() != cpu);
3572 init_waitqueue_head(&t->queue);
3573 complete(&t->start_done);
3575 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3577 set_current_state(TASK_INTERRUPTIBLE);
3581 while (!kthread_should_stop()) {
3582 pkt_dev = next_to_run(t);
3584 if (unlikely(!pkt_dev && t->control == 0)) {
3585 wait_event_interruptible_timeout(t->queue,
3592 __set_current_state(TASK_RUNNING);
3594 if (likely(pkt_dev)) {
3595 pktgen_xmit(pkt_dev);
3598 pktgen_resched(pkt_dev);
3603 if (t->control & T_STOP) {
3605 t->control &= ~(T_STOP);
3608 if (t->control & T_RUN) {
3610 t->control &= ~(T_RUN);
3613 if (t->control & T_REMDEVALL) {
3614 pktgen_rem_all_ifs(t);
3615 t->control &= ~(T_REMDEVALL);
3618 if (t->control & T_REMDEV) {
3619 pktgen_rem_one_if(t);
3620 t->control &= ~(T_REMDEV);
3625 set_current_state(TASK_INTERRUPTIBLE);
3628 pr_debug("%s stopping all device\n", t->tsk->comm);
3631 pr_debug("%s removing all device\n", t->tsk->comm);
3632 pktgen_rem_all_ifs(t);
3634 pr_debug("%s removing thread\n", t->tsk->comm);
3635 pktgen_rem_thread(t);
3640 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3641 const char *ifname, bool exact)
3643 struct pktgen_dev *p, *pkt_dev = NULL;
3644 size_t len = strlen(ifname);
3647 list_for_each_entry(p, &t->if_list, list)
3648 if (strncmp(p->odevname, ifname, len) == 0) {
3649 if (p->odevname[len]) {
3650 if (exact || p->odevname[len] != '@')
3658 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3663 * Adds a dev at front of if_list.
3666 static int add_dev_to_thread(struct pktgen_thread *t,
3667 struct pktgen_dev *pkt_dev)
3673 if (pkt_dev->pg_thread) {
3674 pr_err("ERROR: already assigned to a thread\n");
3679 list_add(&pkt_dev->list, &t->if_list);
3680 pkt_dev->pg_thread = t;
3681 pkt_dev->running = 0;
3688 /* Called under thread lock */
3690 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3692 struct pktgen_dev *pkt_dev;
3694 int node = cpu_to_node(t->cpu);
3696 /* We don't allow a device to be on several threads */
3698 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3700 pr_err("ERROR: interface already used\n");
3704 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3708 strcpy(pkt_dev->odevname, ifname);
3709 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3711 if (pkt_dev->flows == NULL) {
3715 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3717 pkt_dev->removal_mark = 0;
3718 pkt_dev->min_pkt_size = ETH_ZLEN;
3719 pkt_dev->max_pkt_size = ETH_ZLEN;
3720 pkt_dev->nfrags = 0;
3721 pkt_dev->clone_skb = pg_clone_skb_d;
3722 pkt_dev->delay = pg_delay_d;
3723 pkt_dev->count = pg_count_d;
3725 pkt_dev->udp_src_min = 9; /* sink port */
3726 pkt_dev->udp_src_max = 9;
3727 pkt_dev->udp_dst_min = 9;
3728 pkt_dev->udp_dst_max = 9;
3730 pkt_dev->vlan_p = 0;
3731 pkt_dev->vlan_cfi = 0;
3732 pkt_dev->vlan_id = 0xffff;
3733 pkt_dev->svlan_p = 0;
3734 pkt_dev->svlan_cfi = 0;
3735 pkt_dev->svlan_id = 0xffff;
3738 err = pktgen_setup_dev(pkt_dev, ifname);
3742 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3743 &pktgen_if_fops, pkt_dev);
3744 if (!pkt_dev->entry) {
3745 pr_err("cannot create %s/%s procfs entry\n",
3746 PG_PROC_DIR, ifname);
3751 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3752 pkt_dev->ipsproto = IPPROTO_ESP;
3755 return add_dev_to_thread(t, pkt_dev);
3757 dev_put(pkt_dev->odev);
3762 vfree(pkt_dev->flows);
3767 static int __init pktgen_create_thread(int cpu)
3769 struct pktgen_thread *t;
3770 struct proc_dir_entry *pe;
3771 struct task_struct *p;
3773 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3776 pr_err("ERROR: out of memory, can't create new thread\n");
3780 spin_lock_init(&t->if_lock);
3783 INIT_LIST_HEAD(&t->if_list);
3785 list_add_tail(&t->th_list, &pktgen_threads);
3786 init_completion(&t->start_done);
3788 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3790 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3791 list_del(&t->th_list);
3795 kthread_bind(p, cpu);
3798 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3799 &pktgen_thread_fops, t);
3801 pr_err("cannot create %s/%s procfs entry\n",
3802 PG_PROC_DIR, t->tsk->comm);
3804 list_del(&t->th_list);
3810 wait_for_completion(&t->start_done);
3816 * Removes a device from the thread if_list.
3818 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3819 struct pktgen_dev *pkt_dev)
3821 struct list_head *q, *n;
3822 struct pktgen_dev *p;
3824 list_for_each_safe(q, n, &t->if_list) {
3825 p = list_entry(q, struct pktgen_dev, list);
3831 static int pktgen_remove_device(struct pktgen_thread *t,
3832 struct pktgen_dev *pkt_dev)
3835 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3837 if (pkt_dev->running) {
3838 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3839 pktgen_stop_device(pkt_dev);
3842 /* Dis-associate from the interface */
3844 if (pkt_dev->odev) {
3845 dev_put(pkt_dev->odev);
3846 pkt_dev->odev = NULL;
3849 /* And update the thread if_list */
3851 _rem_dev_from_if_list(t, pkt_dev);
3854 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3859 vfree(pkt_dev->flows);
3864 static int __init pg_init(void)
3867 struct proc_dir_entry *pe;
3869 pr_info("%s", version);
3871 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3875 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3877 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3878 proc_net_remove(&init_net, PG_PROC_DIR);
3882 /* Register us to receive netdevice events */
3883 register_netdevice_notifier(&pktgen_notifier_block);
3885 for_each_online_cpu(cpu) {
3888 err = pktgen_create_thread(cpu);
3890 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3894 if (list_empty(&pktgen_threads)) {
3895 pr_err("ERROR: Initialization failed for all threads\n");
3896 unregister_netdevice_notifier(&pktgen_notifier_block);
3897 remove_proc_entry(PGCTRL, pg_proc_dir);
3898 proc_net_remove(&init_net, PG_PROC_DIR);
3905 static void __exit pg_cleanup(void)
3907 struct pktgen_thread *t;
3908 struct list_head *q, *n;
3910 /* Stop all interfaces & threads */
3912 list_for_each_safe(q, n, &pktgen_threads) {
3913 t = list_entry(q, struct pktgen_thread, th_list);
3914 kthread_stop(t->tsk);
3918 /* Un-register us from receiving netdevice events */
3919 unregister_netdevice_notifier(&pktgen_notifier_block);
3921 /* Clean up proc file system */
3922 remove_proc_entry(PGCTRL, pg_proc_dir);
3923 proc_net_remove(&init_net, PG_PROC_DIR);
3926 module_init(pg_init);
3927 module_exit(pg_cleanup);
3930 MODULE_DESCRIPTION("Packet Generator tool");
3931 MODULE_LICENSE("GPL");
3932 MODULE_VERSION(VERSION);
3933 module_param(pg_count_d, int, 0);
3934 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3935 module_param(pg_delay_d, int, 0);
3936 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3937 module_param(pg_clone_skb_d, int, 0);
3938 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3939 module_param(debug, int, 0);
3940 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");