3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
23 * Additional hacking by:
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
54 * Also moved to /proc/net/pktgen/
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
84 * Fix refcount off by one if first packet fails, potential null deref,
87 * First "ranges" functionality for ipv6 030726 --ro
89 * Included flow support. 030802 ANK.
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
99 * Randy Dunlap fixed u64 printk compiler waring
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/addrconf.h>
165 #include <net/xfrm.h>
167 #include <asm/byteorder.h>
168 #include <linux/rcupdate.h>
169 #include <linux/bitops.h>
170 #include <linux/io.h>
171 #include <linux/timex.h>
172 #include <linux/uaccess.h>
174 #include <asm/div64.h> /* do_div */
176 #define VERSION "2.74"
177 #define IP_NAME_SZ 32
178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179 #define MPLS_STACK_BOTTOM htonl(0x00000100)
181 #define func_enter() pr_debug("entering %s\n", __func__);
183 /* Device flag bits */
184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
193 #define F_VID_RND (1<<9) /* Random VLAN ID */
194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199 #define F_NODE (1<<15) /* Node memory alloc*/
201 /* Thread control flag bits */
202 #define T_STOP (1<<0) /* Stop run */
203 #define T_RUN (1<<1) /* Start run */
204 #define T_REMDEVALL (1<<2) /* Remove all devs */
205 #define T_REMDEV (1<<3) /* Remove one dev */
207 /* If lock -- can be removed after some work */
208 #define if_lock(t) spin_lock(&(t->if_lock));
209 #define if_unlock(t) spin_unlock(&(t->if_lock));
211 /* Used to help with determining the pkts on receive */
212 #define PKTGEN_MAGIC 0xbe9be955
213 #define PG_PROC_DIR "pktgen"
214 #define PGCTRL "pgctrl"
215 static struct proc_dir_entry *pg_proc_dir;
217 #define MAX_CFLOWS 65536
219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
226 struct xfrm_state *x;
232 #define F_INIT (1<<0) /* flow has been initialized */
236 * Try to keep frequent/infrequent used vars. separated.
238 struct proc_dir_entry *entry; /* proc file */
239 struct pktgen_thread *pg_thread;/* the owner */
240 struct list_head list; /* chaining in the thread's run-queue */
242 int running; /* if false, the test will stop */
244 /* If min != max, then we will either do a linear iteration, or
245 * we will do a random selection from within the range.
248 int removal_mark; /* non-zero => the device is marked for
249 * removal by worker thread */
253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
256 u64 delay; /* nano-seconds */
258 __u64 count; /* Default No packets to send */
259 __u64 sofar; /* How many pkts we've sent so far */
260 __u64 tx_bytes; /* How many bytes we've transmitted */
261 __u64 errors; /* Errors when trying to transmit, */
263 /* runtime counters relating to clone_skb */
265 __u64 allocated_skbs;
267 int last_ok; /* Was last skb sent?
268 * Or a failed transmit of some sort?
269 * This will keep sequence numbers in order
274 u64 idle_acc; /* nano-seconds */
279 * Use multiple SKBs during packet gen.
280 * If this number is greater than 1, then
281 * that many copies of the same packet will be
282 * sent before a new packet is allocated.
283 * If you want to send 1024 identical packets
284 * before creating a new packet,
285 * set clone_skb to 1024.
288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
293 struct in6_addr in6_saddr;
294 struct in6_addr in6_daddr;
295 struct in6_addr cur_in6_daddr;
296 struct in6_addr cur_in6_saddr;
298 struct in6_addr min_in6_daddr;
299 struct in6_addr max_in6_daddr;
300 struct in6_addr min_in6_saddr;
301 struct in6_addr max_in6_saddr;
303 /* If we're doing ranges, random or incremental, then this
304 * defines the min/max for those ranges.
306 __be32 saddr_min; /* inclusive, source IP address */
307 __be32 saddr_max; /* exclusive, source IP address */
308 __be32 daddr_min; /* inclusive, dest IP address */
309 __be32 daddr_max; /* exclusive, dest IP address */
311 __u16 udp_src_min; /* inclusive, source UDP port */
312 __u16 udp_src_max; /* exclusive, source UDP port */
313 __u16 udp_dst_min; /* inclusive, dest UDP port */
314 __u16 udp_dst_max; /* exclusive, dest UDP port */
317 __u8 tos; /* six MSB of (former) IPv4 TOS
318 are for dscp codepoint */
319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
320 (see RFC 3260, sec. 4) */
323 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
324 __be32 labels[MAX_MPLS_LABELS];
326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
329 __u16 vlan_id; /* 0xffff means no vlan tag */
333 __u16 svlan_id; /* 0xffff means no svlan tag */
335 __u32 src_mac_count; /* How many MACs to iterate through */
336 __u32 dst_mac_count; /* How many MACs to iterate through */
338 unsigned char dst_mac[ETH_ALEN];
339 unsigned char src_mac[ETH_ALEN];
341 __u32 cur_dst_mac_offset;
342 __u32 cur_src_mac_offset;
354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
356 We fill in SRC address later
357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
361 __u16 pad; /* pad out the hh struct to an even 16 bytes */
363 struct sk_buff *skb; /* skb we are to transmit next, used for when we
364 * are transmitting the same one multiple times
366 struct net_device *odev; /* The out-going device.
367 * Note that the device should have it's
368 * pg_info pointer pointing back to this
370 * Set when the user specifies the out-going
371 * device name (not when the inject is
372 * started as it used to do.)
375 struct flow_state *flows;
376 unsigned int cflows; /* Concurrent flows (config) */
377 unsigned int lflow; /* Flow length (config) */
378 unsigned int nflows; /* accumulated flows (stats) */
379 unsigned int curfl; /* current sequenced flow (state)*/
383 __u32 skb_priority; /* skb priority field */
384 int node; /* Memory node */
387 __u8 ipsmode; /* IPSEC mode (config) */
388 __u8 ipsproto; /* IPSEC type (config) */
400 static bool pktgen_exiting __read_mostly;
402 struct pktgen_thread {
403 spinlock_t if_lock; /* for list of devices */
404 struct list_head if_list; /* All device here */
405 struct list_head th_list;
406 struct task_struct *tsk;
409 /* Field for thread to receive "posted" events terminate,
415 wait_queue_head_t queue;
416 struct completion start_done;
422 static inline ktime_t ktime_now(void)
427 return timespec_to_ktime(ts);
430 /* This works even if 32 bit because of careful byte order choice */
431 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
433 return cmp1.tv64 < cmp2.tv64;
436 static const char version[] =
437 "Packet Generator for packet performance testing. "
438 "Version: " VERSION "\n";
440 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
441 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
442 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
443 const char *ifname, bool exact);
444 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
445 static void pktgen_run_all_threads(void);
446 static void pktgen_reset_all_threads(void);
447 static void pktgen_stop_all_threads_ifs(void);
449 static void pktgen_stop(struct pktgen_thread *t);
450 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
452 static unsigned int scan_ip6(const char *s, char ip[16]);
454 /* Module parameters, defaults. */
455 static int pg_count_d __read_mostly = 1000;
456 static int pg_delay_d __read_mostly;
457 static int pg_clone_skb_d __read_mostly;
458 static int debug __read_mostly;
460 static DEFINE_MUTEX(pktgen_thread_lock);
461 static LIST_HEAD(pktgen_threads);
463 static struct notifier_block pktgen_notifier_block = {
464 .notifier_call = pktgen_device_event,
468 * /proc handling functions
472 static int pgctrl_show(struct seq_file *seq, void *v)
474 seq_puts(seq, version);
478 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
479 size_t count, loff_t *ppos)
484 if (!capable(CAP_NET_ADMIN)) {
489 if (count > sizeof(data))
490 count = sizeof(data);
492 if (copy_from_user(data, buf, count)) {
496 data[count - 1] = 0; /* Make string */
498 if (!strcmp(data, "stop"))
499 pktgen_stop_all_threads_ifs();
501 else if (!strcmp(data, "start"))
502 pktgen_run_all_threads();
504 else if (!strcmp(data, "reset"))
505 pktgen_reset_all_threads();
508 pr_warning("Unknown command: %s\n", data);
516 static int pgctrl_open(struct inode *inode, struct file *file)
518 return single_open(file, pgctrl_show, PDE(inode)->data);
521 static const struct file_operations pktgen_fops = {
522 .owner = THIS_MODULE,
526 .write = pgctrl_write,
527 .release = single_release,
530 static int pktgen_if_show(struct seq_file *seq, void *v)
532 const struct pktgen_dev *pkt_dev = seq->private;
537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
538 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
539 pkt_dev->max_pkt_size);
542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
543 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
544 pkt_dev->clone_skb, pkt_dev->odevname);
546 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
550 " queue_map_min: %u queue_map_max: %u\n",
551 pkt_dev->queue_map_min,
552 pkt_dev->queue_map_max);
554 if (pkt_dev->skb_priority)
555 seq_printf(seq, " skb_priority: %u\n",
556 pkt_dev->skb_priority);
558 if (pkt_dev->flags & F_IPV6) {
560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
563 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
565 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
568 " dst_min: %s dst_max: %s\n",
569 pkt_dev->dst_min, pkt_dev->dst_max);
571 " src_min: %s src_max: %s\n",
572 pkt_dev->src_min, pkt_dev->src_max);
575 seq_puts(seq, " src_mac: ");
577 seq_printf(seq, "%pM ",
578 is_zero_ether_addr(pkt_dev->src_mac) ?
579 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
581 seq_printf(seq, "dst_mac: ");
582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
585 " udp_src_min: %d udp_src_max: %d"
586 " udp_dst_min: %d udp_dst_max: %d\n",
587 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
591 " src_mac_count: %d dst_mac_count: %d\n",
592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
594 if (pkt_dev->nr_labels) {
596 seq_printf(seq, " mpls: ");
597 for (i = 0; i < pkt_dev->nr_labels; i++)
598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
599 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
602 if (pkt_dev->vlan_id != 0xffff)
603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->vlan_id, pkt_dev->vlan_p,
607 if (pkt_dev->svlan_id != 0xffff)
608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
609 pkt_dev->svlan_id, pkt_dev->svlan_p,
613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
615 if (pkt_dev->traffic_class)
616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
618 if (pkt_dev->node >= 0)
619 seq_printf(seq, " node: %d\n", pkt_dev->node);
621 seq_printf(seq, " Flags: ");
623 if (pkt_dev->flags & F_IPV6)
624 seq_printf(seq, "IPV6 ");
626 if (pkt_dev->flags & F_IPSRC_RND)
627 seq_printf(seq, "IPSRC_RND ");
629 if (pkt_dev->flags & F_IPDST_RND)
630 seq_printf(seq, "IPDST_RND ");
632 if (pkt_dev->flags & F_TXSIZE_RND)
633 seq_printf(seq, "TXSIZE_RND ");
635 if (pkt_dev->flags & F_UDPSRC_RND)
636 seq_printf(seq, "UDPSRC_RND ");
638 if (pkt_dev->flags & F_UDPDST_RND)
639 seq_printf(seq, "UDPDST_RND ");
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_printf(seq, "MPLS_RND ");
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_printf(seq, "QUEUE_MAP_RND ");
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_printf(seq, "QUEUE_MAP_CPU ");
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
654 seq_printf(seq, "FLOW_RND ");
658 if (pkt_dev->flags & F_IPSEC_ON)
659 seq_printf(seq, "IPSEC ");
662 if (pkt_dev->flags & F_MACSRC_RND)
663 seq_printf(seq, "MACSRC_RND ");
665 if (pkt_dev->flags & F_MACDST_RND)
666 seq_printf(seq, "MACDST_RND ");
668 if (pkt_dev->flags & F_VID_RND)
669 seq_printf(seq, "VID_RND ");
671 if (pkt_dev->flags & F_SVID_RND)
672 seq_printf(seq, "SVID_RND ");
674 if (pkt_dev->flags & F_NODE)
675 seq_printf(seq, "NODE_ALLOC ");
679 /* not really stopped, more like last-running-at */
680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
681 idle = pkt_dev->idle_acc;
682 do_div(idle, NSEC_PER_USEC);
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev->sofar,
687 (unsigned long long)pkt_dev->errors);
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev->started_at),
692 (unsigned long long) ktime_to_us(stopped),
693 (unsigned long long) idle);
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698 pkt_dev->cur_src_mac_offset);
700 if (pkt_dev->flags & F_IPV6) {
701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
702 &pkt_dev->cur_in6_saddr,
703 &pkt_dev->cur_in6_daddr);
705 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
706 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
715 if (pkt_dev->result[0])
716 seq_printf(seq, "Result: %s\n", pkt_dev->result);
718 seq_printf(seq, "Result: Idle\n");
724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
730 for (; i < maxlen; i++) {
734 if (get_user(c, &user_buffer[i]))
736 value = hex_to_bin(c);
745 static int count_trail_chars(const char __user * user_buffer,
750 for (i = 0; i < maxlen; i++) {
752 if (get_user(c, &user_buffer[i]))
770 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
776 for (i = 0; i < maxlen; i++) {
778 if (get_user(c, &user_buffer[i]))
780 if ((c >= '0') && (c <= '9')) {
789 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
793 for (i = 0; i < maxlen; i++) {
795 if (get_user(c, &user_buffer[i]))
813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
820 pkt_dev->nr_labels = 0;
823 len = hex32_arg(&buffer[i], 8, &tmp);
826 pkt_dev->labels[n] = htonl(tmp);
827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
828 pkt_dev->flags |= F_MPLS_RND;
830 if (get_user(c, &buffer[i]))
834 if (n >= MAX_MPLS_LABELS)
838 pkt_dev->nr_labels = n;
842 static ssize_t pktgen_if_write(struct file *file,
843 const char __user * user_buffer, size_t count,
846 struct seq_file *seq = file->private_data;
847 struct pktgen_dev *pkt_dev = seq->private;
849 char name[16], valstr[32];
850 unsigned long value = 0;
851 char *pg_result = NULL;
855 pg_result = &(pkt_dev->result[0]);
858 pr_warning("wrong command format\n");
863 tmp = count_trail_chars(user_buffer, max);
865 pr_warning("illegal format\n");
870 /* Read variable name */
872 len = strn_len(&user_buffer[i], sizeof(name) - 1);
876 memset(name, 0, sizeof(name));
877 if (copy_from_user(name, &user_buffer[i], len))
882 len = count_trail_chars(&user_buffer[i], max);
889 size_t copy = min_t(size_t, count, 1023);
891 if (copy_from_user(tb, user_buffer, copy))
894 pr_debug("%s,%lu buffer -:%s:-\n",
895 name, (unsigned long)count, tb);
898 if (!strcmp(name, "min_pkt_size")) {
899 len = num_arg(&user_buffer[i], 10, &value);
904 if (value < 14 + 20 + 8)
906 if (value != pkt_dev->min_pkt_size) {
907 pkt_dev->min_pkt_size = value;
908 pkt_dev->cur_pkt_size = value;
910 sprintf(pg_result, "OK: min_pkt_size=%u",
911 pkt_dev->min_pkt_size);
915 if (!strcmp(name, "max_pkt_size")) {
916 len = num_arg(&user_buffer[i], 10, &value);
921 if (value < 14 + 20 + 8)
923 if (value != pkt_dev->max_pkt_size) {
924 pkt_dev->max_pkt_size = value;
925 pkt_dev->cur_pkt_size = value;
927 sprintf(pg_result, "OK: max_pkt_size=%u",
928 pkt_dev->max_pkt_size);
932 /* Shortcut for min = max */
934 if (!strcmp(name, "pkt_size")) {
935 len = num_arg(&user_buffer[i], 10, &value);
940 if (value < 14 + 20 + 8)
942 if (value != pkt_dev->min_pkt_size) {
943 pkt_dev->min_pkt_size = value;
944 pkt_dev->max_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
951 if (!strcmp(name, "debug")) {
952 len = num_arg(&user_buffer[i], 10, &value);
958 sprintf(pg_result, "OK: debug=%u", debug);
962 if (!strcmp(name, "frags")) {
963 len = num_arg(&user_buffer[i], 10, &value);
968 pkt_dev->nfrags = value;
969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
972 if (!strcmp(name, "delay")) {
973 len = num_arg(&user_buffer[i], 10, &value);
978 if (value == 0x7FFFFFFF)
979 pkt_dev->delay = ULLONG_MAX;
981 pkt_dev->delay = (u64)value;
983 sprintf(pg_result, "OK: delay=%llu",
984 (unsigned long long) pkt_dev->delay);
987 if (!strcmp(name, "rate")) {
988 len = num_arg(&user_buffer[i], 10, &value);
995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
999 sprintf(pg_result, "OK: rate=%lu", value);
1002 if (!strcmp(name, "ratep")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1010 pkt_dev->delay = NSEC_PER_SEC/value;
1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1014 sprintf(pg_result, "OK: rate=%lu", value);
1017 if (!strcmp(name, "udp_src_min")) {
1018 len = num_arg(&user_buffer[i], 10, &value);
1023 if (value != pkt_dev->udp_src_min) {
1024 pkt_dev->udp_src_min = value;
1025 pkt_dev->cur_udp_src = value;
1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1030 if (!strcmp(name, "udp_dst_min")) {
1031 len = num_arg(&user_buffer[i], 10, &value);
1036 if (value != pkt_dev->udp_dst_min) {
1037 pkt_dev->udp_dst_min = value;
1038 pkt_dev->cur_udp_dst = value;
1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1043 if (!strcmp(name, "udp_src_max")) {
1044 len = num_arg(&user_buffer[i], 10, &value);
1049 if (value != pkt_dev->udp_src_max) {
1050 pkt_dev->udp_src_max = value;
1051 pkt_dev->cur_udp_src = value;
1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1056 if (!strcmp(name, "udp_dst_max")) {
1057 len = num_arg(&user_buffer[i], 10, &value);
1062 if (value != pkt_dev->udp_dst_max) {
1063 pkt_dev->udp_dst_max = value;
1064 pkt_dev->cur_udp_dst = value;
1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1069 if (!strcmp(name, "clone_skb")) {
1070 len = num_arg(&user_buffer[i], 10, &value);
1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1077 pkt_dev->clone_skb = value;
1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1082 if (!strcmp(name, "count")) {
1083 len = num_arg(&user_buffer[i], 10, &value);
1088 pkt_dev->count = value;
1089 sprintf(pg_result, "OK: count=%llu",
1090 (unsigned long long)pkt_dev->count);
1093 if (!strcmp(name, "src_mac_count")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1099 if (pkt_dev->src_mac_count != value) {
1100 pkt_dev->src_mac_count = value;
1101 pkt_dev->cur_src_mac_offset = 0;
1103 sprintf(pg_result, "OK: src_mac_count=%d",
1104 pkt_dev->src_mac_count);
1107 if (!strcmp(name, "dst_mac_count")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1113 if (pkt_dev->dst_mac_count != value) {
1114 pkt_dev->dst_mac_count = value;
1115 pkt_dev->cur_dst_mac_offset = 0;
1117 sprintf(pg_result, "OK: dst_mac_count=%d",
1118 pkt_dev->dst_mac_count);
1121 if (!strcmp(name, "node")) {
1122 len = num_arg(&user_buffer[i], 10, &value);
1128 if (node_possible(value)) {
1129 pkt_dev->node = value;
1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131 if (pkt_dev->page) {
1132 put_page(pkt_dev->page);
1133 pkt_dev->page = NULL;
1137 sprintf(pg_result, "ERROR: node not possible");
1140 if (!strcmp(name, "flag")) {
1143 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1147 if (copy_from_user(f, &user_buffer[i], len))
1150 if (strcmp(f, "IPSRC_RND") == 0)
1151 pkt_dev->flags |= F_IPSRC_RND;
1153 else if (strcmp(f, "!IPSRC_RND") == 0)
1154 pkt_dev->flags &= ~F_IPSRC_RND;
1156 else if (strcmp(f, "TXSIZE_RND") == 0)
1157 pkt_dev->flags |= F_TXSIZE_RND;
1159 else if (strcmp(f, "!TXSIZE_RND") == 0)
1160 pkt_dev->flags &= ~F_TXSIZE_RND;
1162 else if (strcmp(f, "IPDST_RND") == 0)
1163 pkt_dev->flags |= F_IPDST_RND;
1165 else if (strcmp(f, "!IPDST_RND") == 0)
1166 pkt_dev->flags &= ~F_IPDST_RND;
1168 else if (strcmp(f, "UDPSRC_RND") == 0)
1169 pkt_dev->flags |= F_UDPSRC_RND;
1171 else if (strcmp(f, "!UDPSRC_RND") == 0)
1172 pkt_dev->flags &= ~F_UDPSRC_RND;
1174 else if (strcmp(f, "UDPDST_RND") == 0)
1175 pkt_dev->flags |= F_UDPDST_RND;
1177 else if (strcmp(f, "!UDPDST_RND") == 0)
1178 pkt_dev->flags &= ~F_UDPDST_RND;
1180 else if (strcmp(f, "MACSRC_RND") == 0)
1181 pkt_dev->flags |= F_MACSRC_RND;
1183 else if (strcmp(f, "!MACSRC_RND") == 0)
1184 pkt_dev->flags &= ~F_MACSRC_RND;
1186 else if (strcmp(f, "MACDST_RND") == 0)
1187 pkt_dev->flags |= F_MACDST_RND;
1189 else if (strcmp(f, "!MACDST_RND") == 0)
1190 pkt_dev->flags &= ~F_MACDST_RND;
1192 else if (strcmp(f, "MPLS_RND") == 0)
1193 pkt_dev->flags |= F_MPLS_RND;
1195 else if (strcmp(f, "!MPLS_RND") == 0)
1196 pkt_dev->flags &= ~F_MPLS_RND;
1198 else if (strcmp(f, "VID_RND") == 0)
1199 pkt_dev->flags |= F_VID_RND;
1201 else if (strcmp(f, "!VID_RND") == 0)
1202 pkt_dev->flags &= ~F_VID_RND;
1204 else if (strcmp(f, "SVID_RND") == 0)
1205 pkt_dev->flags |= F_SVID_RND;
1207 else if (strcmp(f, "!SVID_RND") == 0)
1208 pkt_dev->flags &= ~F_SVID_RND;
1210 else if (strcmp(f, "FLOW_SEQ") == 0)
1211 pkt_dev->flags |= F_FLOW_SEQ;
1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214 pkt_dev->flags |= F_QUEUE_MAP_RND;
1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1225 else if (strcmp(f, "IPSEC") == 0)
1226 pkt_dev->flags |= F_IPSEC_ON;
1229 else if (strcmp(f, "!IPV6") == 0)
1230 pkt_dev->flags &= ~F_IPV6;
1232 else if (strcmp(f, "NODE_ALLOC") == 0)
1233 pkt_dev->flags |= F_NODE;
1235 else if (strcmp(f, "!NODE_ALLOC") == 0)
1236 pkt_dev->flags &= ~F_NODE;
1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1254 if (copy_from_user(buf, &user_buffer[i], len))
1257 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259 strncpy(pkt_dev->dst_min, buf, len);
1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1264 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1266 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1269 if (!strcmp(name, "dst_max")) {
1270 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1275 if (copy_from_user(buf, &user_buffer[i], len))
1279 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1280 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1281 strncpy(pkt_dev->dst_max, buf, len);
1282 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1283 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1286 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1288 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1291 if (!strcmp(name, "dst6")) {
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_daddr.s6_addr);
1303 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1305 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1308 pr_debug("dst6 set to: %s\n", buf);
1311 sprintf(pg_result, "OK: dst6=%s", buf);
1314 if (!strcmp(name, "dst6_min")) {
1315 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1319 pkt_dev->flags |= F_IPV6;
1321 if (copy_from_user(buf, &user_buffer[i], len))
1325 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1326 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1328 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1330 pr_debug("dst6_min set to: %s\n", buf);
1333 sprintf(pg_result, "OK: dst6_min=%s", buf);
1336 if (!strcmp(name, "dst6_max")) {
1337 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1341 pkt_dev->flags |= F_IPV6;
1343 if (copy_from_user(buf, &user_buffer[i], len))
1347 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1348 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1351 pr_debug("dst6_max set to: %s\n", buf);
1354 sprintf(pg_result, "OK: dst6_max=%s", buf);
1357 if (!strcmp(name, "src6")) {
1358 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1362 pkt_dev->flags |= F_IPV6;
1364 if (copy_from_user(buf, &user_buffer[i], len))
1368 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1369 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1371 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1374 pr_debug("src6 set to: %s\n", buf);
1377 sprintf(pg_result, "OK: src6=%s", buf);
1380 if (!strcmp(name, "src_min")) {
1381 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1385 if (copy_from_user(buf, &user_buffer[i], len))
1388 if (strcmp(buf, pkt_dev->src_min) != 0) {
1389 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1390 strncpy(pkt_dev->src_min, buf, len);
1391 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1392 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1395 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1397 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1400 if (!strcmp(name, "src_max")) {
1401 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1405 if (copy_from_user(buf, &user_buffer[i], len))
1408 if (strcmp(buf, pkt_dev->src_max) != 0) {
1409 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1410 strncpy(pkt_dev->src_max, buf, len);
1411 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1412 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1415 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1417 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1420 if (!strcmp(name, "dst_mac")) {
1421 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1425 memset(valstr, 0, sizeof(valstr));
1426 if (copy_from_user(valstr, &user_buffer[i], len))
1429 if (!mac_pton(valstr, pkt_dev->dst_mac))
1431 /* Set up Dest MAC */
1432 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1434 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1437 if (!strcmp(name, "src_mac")) {
1438 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1442 memset(valstr, 0, sizeof(valstr));
1443 if (copy_from_user(valstr, &user_buffer[i], len))
1446 if (!mac_pton(valstr, pkt_dev->src_mac))
1448 /* Set up Src MAC */
1449 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1451 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1455 if (!strcmp(name, "clear_counters")) {
1456 pktgen_clear_counters(pkt_dev);
1457 sprintf(pg_result, "OK: Clearing counters.\n");
1461 if (!strcmp(name, "flows")) {
1462 len = num_arg(&user_buffer[i], 10, &value);
1467 if (value > MAX_CFLOWS)
1470 pkt_dev->cflows = value;
1471 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1475 if (!strcmp(name, "flowlen")) {
1476 len = num_arg(&user_buffer[i], 10, &value);
1481 pkt_dev->lflow = value;
1482 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1486 if (!strcmp(name, "queue_map_min")) {
1487 len = num_arg(&user_buffer[i], 5, &value);
1492 pkt_dev->queue_map_min = value;
1493 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1497 if (!strcmp(name, "queue_map_max")) {
1498 len = num_arg(&user_buffer[i], 5, &value);
1503 pkt_dev->queue_map_max = value;
1504 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1508 if (!strcmp(name, "mpls")) {
1509 unsigned int n, cnt;
1511 len = get_labels(&user_buffer[i], pkt_dev);
1515 cnt = sprintf(pg_result, "OK: mpls=");
1516 for (n = 0; n < pkt_dev->nr_labels; n++)
1517 cnt += sprintf(pg_result + cnt,
1518 "%08x%s", ntohl(pkt_dev->labels[n]),
1519 n == pkt_dev->nr_labels-1 ? "" : ",");
1521 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1522 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1523 pkt_dev->svlan_id = 0xffff;
1526 pr_debug("VLAN/SVLAN auto turned off\n");
1531 if (!strcmp(name, "vlan_id")) {
1532 len = num_arg(&user_buffer[i], 4, &value);
1537 if (value <= 4095) {
1538 pkt_dev->vlan_id = value; /* turn on VLAN */
1541 pr_debug("VLAN turned on\n");
1543 if (debug && pkt_dev->nr_labels)
1544 pr_debug("MPLS auto turned off\n");
1546 pkt_dev->nr_labels = 0; /* turn off MPLS */
1547 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1549 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1550 pkt_dev->svlan_id = 0xffff;
1553 pr_debug("VLAN/SVLAN turned off\n");
1558 if (!strcmp(name, "vlan_p")) {
1559 len = num_arg(&user_buffer[i], 1, &value);
1564 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1565 pkt_dev->vlan_p = value;
1566 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1568 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1573 if (!strcmp(name, "vlan_cfi")) {
1574 len = num_arg(&user_buffer[i], 1, &value);
1579 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1580 pkt_dev->vlan_cfi = value;
1581 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1583 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1588 if (!strcmp(name, "svlan_id")) {
1589 len = num_arg(&user_buffer[i], 4, &value);
1594 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1595 pkt_dev->svlan_id = value; /* turn on SVLAN */
1598 pr_debug("SVLAN turned on\n");
1600 if (debug && pkt_dev->nr_labels)
1601 pr_debug("MPLS auto turned off\n");
1603 pkt_dev->nr_labels = 0; /* turn off MPLS */
1604 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1606 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1607 pkt_dev->svlan_id = 0xffff;
1610 pr_debug("VLAN/SVLAN turned off\n");
1615 if (!strcmp(name, "svlan_p")) {
1616 len = num_arg(&user_buffer[i], 1, &value);
1621 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1622 pkt_dev->svlan_p = value;
1623 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1625 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1630 if (!strcmp(name, "svlan_cfi")) {
1631 len = num_arg(&user_buffer[i], 1, &value);
1636 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1637 pkt_dev->svlan_cfi = value;
1638 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1640 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1645 if (!strcmp(name, "tos")) {
1646 __u32 tmp_value = 0;
1647 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1653 pkt_dev->tos = tmp_value;
1654 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1656 sprintf(pg_result, "ERROR: tos must be 00-ff");
1661 if (!strcmp(name, "traffic_class")) {
1662 __u32 tmp_value = 0;
1663 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1669 pkt_dev->traffic_class = tmp_value;
1670 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1672 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1677 if (!strcmp(name, "skb_priority")) {
1678 len = num_arg(&user_buffer[i], 9, &value);
1683 pkt_dev->skb_priority = value;
1684 sprintf(pg_result, "OK: skb_priority=%i",
1685 pkt_dev->skb_priority);
1689 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1693 static int pktgen_if_open(struct inode *inode, struct file *file)
1695 return single_open(file, pktgen_if_show, PDE(inode)->data);
1698 static const struct file_operations pktgen_if_fops = {
1699 .owner = THIS_MODULE,
1700 .open = pktgen_if_open,
1702 .llseek = seq_lseek,
1703 .write = pktgen_if_write,
1704 .release = single_release,
1707 static int pktgen_thread_show(struct seq_file *seq, void *v)
1709 struct pktgen_thread *t = seq->private;
1710 const struct pktgen_dev *pkt_dev;
1714 seq_printf(seq, "Running: ");
1717 list_for_each_entry(pkt_dev, &t->if_list, list)
1718 if (pkt_dev->running)
1719 seq_printf(seq, "%s ", pkt_dev->odevname);
1721 seq_printf(seq, "\nStopped: ");
1723 list_for_each_entry(pkt_dev, &t->if_list, list)
1724 if (!pkt_dev->running)
1725 seq_printf(seq, "%s ", pkt_dev->odevname);
1728 seq_printf(seq, "\nResult: %s\n", t->result);
1730 seq_printf(seq, "\nResult: NA\n");
1737 static ssize_t pktgen_thread_write(struct file *file,
1738 const char __user * user_buffer,
1739 size_t count, loff_t * offset)
1741 struct seq_file *seq = file->private_data;
1742 struct pktgen_thread *t = seq->private;
1743 int i, max, len, ret;
1748 // sprintf(pg_result, "Wrong command format");
1753 len = count_trail_chars(user_buffer, max);
1759 /* Read variable name */
1761 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1765 memset(name, 0, sizeof(name));
1766 if (copy_from_user(name, &user_buffer[i], len))
1771 len = count_trail_chars(&user_buffer[i], max);
1778 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1781 pr_err("ERROR: No thread\n");
1786 pg_result = &(t->result[0]);
1788 if (!strcmp(name, "add_device")) {
1791 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1796 if (copy_from_user(f, &user_buffer[i], len))
1799 mutex_lock(&pktgen_thread_lock);
1800 pktgen_add_device(t, f);
1801 mutex_unlock(&pktgen_thread_lock);
1803 sprintf(pg_result, "OK: add_device=%s", f);
1807 if (!strcmp(name, "rem_device_all")) {
1808 mutex_lock(&pktgen_thread_lock);
1809 t->control |= T_REMDEVALL;
1810 mutex_unlock(&pktgen_thread_lock);
1811 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1813 sprintf(pg_result, "OK: rem_device_all");
1817 if (!strcmp(name, "max_before_softirq")) {
1818 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1828 static int pktgen_thread_open(struct inode *inode, struct file *file)
1830 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1833 static const struct file_operations pktgen_thread_fops = {
1834 .owner = THIS_MODULE,
1835 .open = pktgen_thread_open,
1837 .llseek = seq_lseek,
1838 .write = pktgen_thread_write,
1839 .release = single_release,
1842 /* Think find or remove for NN */
1843 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1845 struct pktgen_thread *t;
1846 struct pktgen_dev *pkt_dev = NULL;
1847 bool exact = (remove == FIND);
1849 list_for_each_entry(t, &pktgen_threads, th_list) {
1850 pkt_dev = pktgen_find_dev(t, ifname, exact);
1854 pkt_dev->removal_mark = 1;
1855 t->control |= T_REMDEV;
1865 * mark a device for removal
1867 static void pktgen_mark_device(const char *ifname)
1869 struct pktgen_dev *pkt_dev = NULL;
1870 const int max_tries = 10, msec_per_try = 125;
1873 mutex_lock(&pktgen_thread_lock);
1874 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1878 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1879 if (pkt_dev == NULL)
1880 break; /* success */
1882 mutex_unlock(&pktgen_thread_lock);
1883 pr_debug("%s: waiting for %s to disappear....\n",
1885 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1886 mutex_lock(&pktgen_thread_lock);
1888 if (++i >= max_tries) {
1889 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1890 __func__, msec_per_try * i, ifname);
1896 mutex_unlock(&pktgen_thread_lock);
1899 static void pktgen_change_name(struct net_device *dev)
1901 struct pktgen_thread *t;
1903 list_for_each_entry(t, &pktgen_threads, th_list) {
1904 struct pktgen_dev *pkt_dev;
1906 list_for_each_entry(pkt_dev, &t->if_list, list) {
1907 if (pkt_dev->odev != dev)
1910 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1912 pkt_dev->entry = proc_create_data(dev->name, 0600,
1916 if (!pkt_dev->entry)
1917 pr_err("can't move proc entry for '%s'\n",
1924 static int pktgen_device_event(struct notifier_block *unused,
1925 unsigned long event, void *ptr)
1927 struct net_device *dev = ptr;
1929 if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting)
1932 /* It is OK that we do not hold the group lock right now,
1933 * as we run under the RTNL lock.
1937 case NETDEV_CHANGENAME:
1938 pktgen_change_name(dev);
1941 case NETDEV_UNREGISTER:
1942 pktgen_mark_device(dev->name);
1949 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1955 for (i = 0; ifname[i] != '@'; i++) {
1963 return dev_get_by_name(&init_net, b);
1967 /* Associate pktgen_dev with a device. */
1969 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1971 struct net_device *odev;
1974 /* Clean old setups */
1975 if (pkt_dev->odev) {
1976 dev_put(pkt_dev->odev);
1977 pkt_dev->odev = NULL;
1980 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1982 pr_err("no such netdevice: \"%s\"\n", ifname);
1986 if (odev->type != ARPHRD_ETHER) {
1987 pr_err("not an ethernet device: \"%s\"\n", ifname);
1989 } else if (!netif_running(odev)) {
1990 pr_err("device is down: \"%s\"\n", ifname);
1993 pkt_dev->odev = odev;
2001 /* Read pkt_dev from the interface and set up internal pktgen_dev
2002 * structure to have the right information to create/send packets
2004 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2008 if (!pkt_dev->odev) {
2009 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2010 sprintf(pkt_dev->result,
2011 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2015 /* make sure that we don't pick a non-existing transmit queue */
2016 ntxq = pkt_dev->odev->real_num_tx_queues;
2018 if (ntxq <= pkt_dev->queue_map_min) {
2019 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2020 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2022 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2024 if (pkt_dev->queue_map_max >= ntxq) {
2025 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2026 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2028 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2031 /* Default to the interface's mac if not explicitly set. */
2033 if (is_zero_ether_addr(pkt_dev->src_mac))
2034 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2036 /* Set up Dest MAC */
2037 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2039 if (pkt_dev->flags & F_IPV6) {
2040 if (pkt_dev->min_pkt_size == 0) {
2041 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2042 + sizeof(struct udphdr)
2043 + sizeof(struct pktgen_hdr)
2044 + pkt_dev->pkt_overhead;
2048 * Skip this automatic address setting until locks or functions
2053 int i, set = 0, err = 1;
2054 struct inet6_dev *idev;
2056 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2057 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2065 * Use linklevel address if unconfigured.
2067 * use ipv6_get_lladdr if/when it's get exported
2071 idev = __in6_dev_get(pkt_dev->odev);
2073 struct inet6_ifaddr *ifp;
2075 read_lock_bh(&idev->lock);
2076 for (ifp = idev->addr_list; ifp;
2077 ifp = ifp->if_next) {
2078 if (ifp->scope == IFA_LINK &&
2079 !(ifp->flags & IFA_F_TENTATIVE)) {
2080 pkt_dev->cur_in6_saddr = ifp->addr;
2085 read_unlock_bh(&idev->lock);
2089 pr_err("ERROR: IPv6 link address not available\n");
2093 if (pkt_dev->min_pkt_size == 0) {
2094 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2095 + sizeof(struct udphdr)
2096 + sizeof(struct pktgen_hdr)
2097 + pkt_dev->pkt_overhead;
2100 pkt_dev->saddr_min = 0;
2101 pkt_dev->saddr_max = 0;
2102 if (strlen(pkt_dev->src_min) == 0) {
2104 struct in_device *in_dev;
2107 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2109 if (in_dev->ifa_list) {
2110 pkt_dev->saddr_min =
2111 in_dev->ifa_list->ifa_address;
2112 pkt_dev->saddr_max = pkt_dev->saddr_min;
2117 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2118 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2121 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2122 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2124 /* Initialize current values. */
2125 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2126 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2127 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2129 pkt_dev->cur_dst_mac_offset = 0;
2130 pkt_dev->cur_src_mac_offset = 0;
2131 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2132 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2133 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2134 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2135 pkt_dev->nflows = 0;
2139 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2141 ktime_t start_time, end_time;
2143 struct hrtimer_sleeper t;
2145 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2146 hrtimer_set_expires(&t.timer, spin_until);
2148 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2149 if (remaining <= 0) {
2150 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2154 start_time = ktime_now();
2155 if (remaining < 100000) {
2156 /* for small delays (<100us), just loop until limit is reached */
2158 end_time = ktime_now();
2159 } while (ktime_lt(end_time, spin_until));
2161 /* see do_nanosleep */
2162 hrtimer_init_sleeper(&t, current);
2164 set_current_state(TASK_INTERRUPTIBLE);
2165 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2166 if (!hrtimer_active(&t.timer))
2172 hrtimer_cancel(&t.timer);
2173 } while (t.task && pkt_dev->running && !signal_pending(current));
2174 __set_current_state(TASK_RUNNING);
2175 end_time = ktime_now();
2178 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2179 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2182 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2184 pkt_dev->pkt_overhead = 0;
2185 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2186 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2187 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2190 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2192 return !!(pkt_dev->flows[flow].flags & F_INIT);
2195 static inline int f_pick(struct pktgen_dev *pkt_dev)
2197 int flow = pkt_dev->curfl;
2199 if (pkt_dev->flags & F_FLOW_SEQ) {
2200 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2202 pkt_dev->flows[flow].count = 0;
2203 pkt_dev->flows[flow].flags = 0;
2204 pkt_dev->curfl += 1;
2205 if (pkt_dev->curfl >= pkt_dev->cflows)
2206 pkt_dev->curfl = 0; /*reset */
2209 flow = random32() % pkt_dev->cflows;
2210 pkt_dev->curfl = flow;
2212 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2213 pkt_dev->flows[flow].count = 0;
2214 pkt_dev->flows[flow].flags = 0;
2218 return pkt_dev->curfl;
2223 /* If there was already an IPSEC SA, we keep it as is, else
2224 * we go look for it ...
2226 #define DUMMY_MARK 0
2227 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2229 struct xfrm_state *x = pkt_dev->flows[flow].x;
2231 /*slow path: we dont already have xfrm_state*/
2232 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2233 (xfrm_address_t *)&pkt_dev->cur_daddr,
2234 (xfrm_address_t *)&pkt_dev->cur_saddr,
2237 pkt_dev->ipsproto, 0);
2239 pkt_dev->flows[flow].x = x;
2240 set_pkt_overhead(pkt_dev);
2241 pkt_dev->pkt_overhead += x->props.header_len;
2247 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2250 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2251 pkt_dev->cur_queue_map = smp_processor_id();
2253 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2255 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2257 (pkt_dev->queue_map_max -
2258 pkt_dev->queue_map_min + 1)
2259 + pkt_dev->queue_map_min;
2261 t = pkt_dev->cur_queue_map + 1;
2262 if (t > pkt_dev->queue_map_max)
2263 t = pkt_dev->queue_map_min;
2265 pkt_dev->cur_queue_map = t;
2267 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2270 /* Increment/randomize headers according to flags and current values
2271 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2273 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2279 if (pkt_dev->cflows)
2280 flow = f_pick(pkt_dev);
2282 /* Deal with source MAC */
2283 if (pkt_dev->src_mac_count > 1) {
2287 if (pkt_dev->flags & F_MACSRC_RND)
2288 mc = random32() % pkt_dev->src_mac_count;
2290 mc = pkt_dev->cur_src_mac_offset++;
2291 if (pkt_dev->cur_src_mac_offset >=
2292 pkt_dev->src_mac_count)
2293 pkt_dev->cur_src_mac_offset = 0;
2296 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2297 pkt_dev->hh[11] = tmp;
2298 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2299 pkt_dev->hh[10] = tmp;
2300 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2301 pkt_dev->hh[9] = tmp;
2302 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2303 pkt_dev->hh[8] = tmp;
2304 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2305 pkt_dev->hh[7] = tmp;
2308 /* Deal with Destination MAC */
2309 if (pkt_dev->dst_mac_count > 1) {
2313 if (pkt_dev->flags & F_MACDST_RND)
2314 mc = random32() % pkt_dev->dst_mac_count;
2317 mc = pkt_dev->cur_dst_mac_offset++;
2318 if (pkt_dev->cur_dst_mac_offset >=
2319 pkt_dev->dst_mac_count) {
2320 pkt_dev->cur_dst_mac_offset = 0;
2324 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2325 pkt_dev->hh[5] = tmp;
2326 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2327 pkt_dev->hh[4] = tmp;
2328 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2329 pkt_dev->hh[3] = tmp;
2330 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2331 pkt_dev->hh[2] = tmp;
2332 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2333 pkt_dev->hh[1] = tmp;
2336 if (pkt_dev->flags & F_MPLS_RND) {
2338 for (i = 0; i < pkt_dev->nr_labels; i++)
2339 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2340 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2341 ((__force __be32)random32() &
2345 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2346 pkt_dev->vlan_id = random32() & (4096-1);
2349 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2350 pkt_dev->svlan_id = random32() & (4096 - 1);
2353 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2354 if (pkt_dev->flags & F_UDPSRC_RND)
2355 pkt_dev->cur_udp_src = random32() %
2356 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2357 + pkt_dev->udp_src_min;
2360 pkt_dev->cur_udp_src++;
2361 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2362 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2366 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2367 if (pkt_dev->flags & F_UDPDST_RND) {
2368 pkt_dev->cur_udp_dst = random32() %
2369 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2370 + pkt_dev->udp_dst_min;
2372 pkt_dev->cur_udp_dst++;
2373 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2374 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2378 if (!(pkt_dev->flags & F_IPV6)) {
2380 imn = ntohl(pkt_dev->saddr_min);
2381 imx = ntohl(pkt_dev->saddr_max);
2384 if (pkt_dev->flags & F_IPSRC_RND)
2385 t = random32() % (imx - imn) + imn;
2387 t = ntohl(pkt_dev->cur_saddr);
2393 pkt_dev->cur_saddr = htonl(t);
2396 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2397 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2399 imn = ntohl(pkt_dev->daddr_min);
2400 imx = ntohl(pkt_dev->daddr_max);
2404 if (pkt_dev->flags & F_IPDST_RND) {
2406 t = random32() % (imx - imn) + imn;
2409 while (ipv4_is_loopback(s) ||
2410 ipv4_is_multicast(s) ||
2411 ipv4_is_lbcast(s) ||
2412 ipv4_is_zeronet(s) ||
2413 ipv4_is_local_multicast(s)) {
2414 t = random32() % (imx - imn) + imn;
2417 pkt_dev->cur_daddr = s;
2419 t = ntohl(pkt_dev->cur_daddr);
2424 pkt_dev->cur_daddr = htonl(t);
2427 if (pkt_dev->cflows) {
2428 pkt_dev->flows[flow].flags |= F_INIT;
2429 pkt_dev->flows[flow].cur_daddr =
2432 if (pkt_dev->flags & F_IPSEC_ON)
2433 get_ipsec_sa(pkt_dev, flow);
2438 } else { /* IPV6 * */
2440 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2441 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2442 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2443 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2447 /* Only random destinations yet */
2449 for (i = 0; i < 4; i++) {
2450 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2451 (((__force __be32)random32() |
2452 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2453 pkt_dev->max_in6_daddr.s6_addr32[i]);
2458 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2460 if (pkt_dev->flags & F_TXSIZE_RND) {
2462 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2463 + pkt_dev->min_pkt_size;
2465 t = pkt_dev->cur_pkt_size + 1;
2466 if (t > pkt_dev->max_pkt_size)
2467 t = pkt_dev->min_pkt_size;
2469 pkt_dev->cur_pkt_size = t;
2472 set_cur_queue_map(pkt_dev);
2474 pkt_dev->flows[flow].count++;
2479 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2481 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2486 /* XXX: we dont support tunnel mode for now until
2487 * we resolve the dst issue */
2488 if (x->props.mode != XFRM_MODE_TRANSPORT)
2491 spin_lock(&x->lock);
2493 err = x->outer_mode->output(x, skb);
2496 err = x->type->output(x, skb);
2500 x->curlft.bytes += skb->len;
2501 x->curlft.packets++;
2503 spin_unlock(&x->lock);
2507 static void free_SAs(struct pktgen_dev *pkt_dev)
2509 if (pkt_dev->cflows) {
2510 /* let go of the SAs if we have them */
2512 for (i = 0; i < pkt_dev->cflows; i++) {
2513 struct xfrm_state *x = pkt_dev->flows[i].x;
2516 pkt_dev->flows[i].x = NULL;
2522 static int process_ipsec(struct pktgen_dev *pkt_dev,
2523 struct sk_buff *skb, __be16 protocol)
2525 if (pkt_dev->flags & F_IPSEC_ON) {
2526 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2531 nhead = x->props.header_len - skb_headroom(skb);
2533 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2535 pr_err("Error expanding ipsec packet %d\n",
2541 /* ipsec is not expecting ll header */
2542 skb_pull(skb, ETH_HLEN);
2543 ret = pktgen_output_ipsec(skb, pkt_dev);
2545 pr_err("Error creating ipsec packet %d\n", ret);
2549 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2550 memcpy(eth, pkt_dev->hh, 12);
2551 *(u16 *) ð[12] = protocol;
2561 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2564 for (i = 0; i < pkt_dev->nr_labels; i++)
2565 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2568 *mpls |= MPLS_STACK_BOTTOM;
2571 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2574 return htons(id | (cfi << 12) | (prio << 13));
2577 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2580 struct timeval timestamp;
2581 struct pktgen_hdr *pgh;
2583 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2584 datalen -= sizeof(*pgh);
2586 if (pkt_dev->nfrags <= 0) {
2587 memset(skb_put(skb, datalen), 0, datalen);
2589 int frags = pkt_dev->nfrags;
2594 if (frags > MAX_SKB_FRAGS)
2595 frags = MAX_SKB_FRAGS;
2596 len = datalen - frags * PAGE_SIZE;
2598 memset(skb_put(skb, len), 0, len);
2599 datalen = frags * PAGE_SIZE;
2603 frag_len = (datalen/frags) < PAGE_SIZE ?
2604 (datalen/frags) : PAGE_SIZE;
2605 while (datalen > 0) {
2606 if (unlikely(!pkt_dev->page)) {
2607 int node = numa_node_id();
2609 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2610 node = pkt_dev->node;
2611 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2615 get_page(pkt_dev->page);
2616 skb_frag_set_page(skb, i, pkt_dev->page);
2617 skb_shinfo(skb)->frags[i].page_offset = 0;
2618 /*last fragment, fill rest of data*/
2619 if (i == (frags - 1))
2620 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2621 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2623 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2624 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2625 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2626 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2628 skb_shinfo(skb)->nr_frags = i;
2632 /* Stamp the time, and sequence number,
2633 * convert them to network byte order
2635 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2636 pgh->seq_num = htonl(pkt_dev->seq_num);
2638 do_gettimeofday(×tamp);
2639 pgh->tv_sec = htonl(timestamp.tv_sec);
2640 pgh->tv_usec = htonl(timestamp.tv_usec);
2643 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2644 struct pktgen_dev *pkt_dev)
2646 struct sk_buff *skb = NULL;
2648 struct udphdr *udph;
2651 __be16 protocol = htons(ETH_P_IP);
2653 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2654 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2655 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2656 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2659 if (pkt_dev->nr_labels)
2660 protocol = htons(ETH_P_MPLS_UC);
2662 if (pkt_dev->vlan_id != 0xffff)
2663 protocol = htons(ETH_P_8021Q);
2665 /* Update any of the values, used when we're incrementing various
2668 mod_cur_headers(pkt_dev);
2669 queue_map = pkt_dev->cur_queue_map;
2671 datalen = (odev->hard_header_len + 16) & ~0xf;
2673 if (pkt_dev->flags & F_NODE) {
2676 if (pkt_dev->node >= 0)
2677 node = pkt_dev->node;
2679 node = numa_node_id();
2681 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2682 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2684 skb_reserve(skb, NET_SKB_PAD);
2689 skb = __netdev_alloc_skb(odev,
2690 pkt_dev->cur_pkt_size + 64
2691 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2694 sprintf(pkt_dev->result, "No memory");
2697 prefetchw(skb->data);
2699 skb_reserve(skb, datalen);
2701 /* Reserve for ethernet and IP header */
2702 eth = (__u8 *) skb_push(skb, 14);
2703 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2704 if (pkt_dev->nr_labels)
2705 mpls_push(mpls, pkt_dev);
2707 if (pkt_dev->vlan_id != 0xffff) {
2708 if (pkt_dev->svlan_id != 0xffff) {
2709 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2710 *svlan_tci = build_tci(pkt_dev->svlan_id,
2713 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2714 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2716 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2717 *vlan_tci = build_tci(pkt_dev->vlan_id,
2720 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2721 *vlan_encapsulated_proto = htons(ETH_P_IP);
2724 skb->network_header = skb->tail;
2725 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2726 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2727 skb_set_queue_mapping(skb, queue_map);
2728 skb->priority = pkt_dev->skb_priority;
2731 udph = udp_hdr(skb);
2733 memcpy(eth, pkt_dev->hh, 12);
2734 *(__be16 *) & eth[12] = protocol;
2736 /* Eth + IPh + UDPh + mpls */
2737 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2738 pkt_dev->pkt_overhead;
2739 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2740 datalen = sizeof(struct pktgen_hdr);
2742 udph->source = htons(pkt_dev->cur_udp_src);
2743 udph->dest = htons(pkt_dev->cur_udp_dst);
2744 udph->len = htons(datalen + 8); /* DATA + udphdr */
2745 udph->check = 0; /* No checksum */
2750 iph->tos = pkt_dev->tos;
2751 iph->protocol = IPPROTO_UDP; /* UDP */
2752 iph->saddr = pkt_dev->cur_saddr;
2753 iph->daddr = pkt_dev->cur_daddr;
2754 iph->id = htons(pkt_dev->ip_id);
2757 iplen = 20 + 8 + datalen;
2758 iph->tot_len = htons(iplen);
2760 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2761 skb->protocol = protocol;
2762 skb->mac_header = (skb->network_header - ETH_HLEN -
2763 pkt_dev->pkt_overhead);
2765 skb->pkt_type = PACKET_HOST;
2766 pktgen_finalize_skb(pkt_dev, skb, datalen);
2769 if (!process_ipsec(pkt_dev, skb, protocol))
2777 * scan_ip6, fmt_ip taken from dietlibc-0.21
2778 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2780 * Slightly modified for kernel.
2781 * Should be candidate for net/ipv4/utils.c
2785 static unsigned int scan_ip6(const char *s, char ip[16])
2788 unsigned int len = 0;
2791 unsigned int prefixlen = 0;
2792 unsigned int suffixlen = 0;
2796 for (i = 0; i < 16; i++)
2802 if (s[1] == ':') { /* Found "::", skip to part 2 */
2810 u = simple_strtoul(s, &pos, 16);
2814 if (prefixlen == 12 && s[i] == '.') {
2816 /* the last 4 bytes may be written as IPv4 address */
2819 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2822 ip[prefixlen++] = (u >> 8);
2823 ip[prefixlen++] = (u & 255);
2826 if (prefixlen == 16)
2830 /* part 2, after "::" */
2837 } else if (suffixlen != 0)
2840 u = simple_strtol(s, &pos, 16);
2847 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2849 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2855 suffix[suffixlen++] = (u >> 8);
2856 suffix[suffixlen++] = (u & 255);
2859 if (prefixlen + suffixlen == 16)
2862 for (i = 0; i < suffixlen; i++)
2863 ip[16 - suffixlen + i] = suffix[i];
2867 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2868 struct pktgen_dev *pkt_dev)
2870 struct sk_buff *skb = NULL;
2872 struct udphdr *udph;
2874 struct ipv6hdr *iph;
2875 __be16 protocol = htons(ETH_P_IPV6);
2877 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2878 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2879 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2880 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2883 if (pkt_dev->nr_labels)
2884 protocol = htons(ETH_P_MPLS_UC);
2886 if (pkt_dev->vlan_id != 0xffff)
2887 protocol = htons(ETH_P_8021Q);
2889 /* Update any of the values, used when we're incrementing various
2892 mod_cur_headers(pkt_dev);
2893 queue_map = pkt_dev->cur_queue_map;
2895 skb = __netdev_alloc_skb(odev,
2896 pkt_dev->cur_pkt_size + 64
2897 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2899 sprintf(pkt_dev->result, "No memory");
2902 prefetchw(skb->data);
2904 skb_reserve(skb, 16);
2906 /* Reserve for ethernet and IP header */
2907 eth = (__u8 *) skb_push(skb, 14);
2908 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2909 if (pkt_dev->nr_labels)
2910 mpls_push(mpls, pkt_dev);
2912 if (pkt_dev->vlan_id != 0xffff) {
2913 if (pkt_dev->svlan_id != 0xffff) {
2914 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2915 *svlan_tci = build_tci(pkt_dev->svlan_id,
2918 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2919 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2921 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2922 *vlan_tci = build_tci(pkt_dev->vlan_id,
2925 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2926 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2929 skb->network_header = skb->tail;
2930 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2931 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2932 skb_set_queue_mapping(skb, queue_map);
2933 skb->priority = pkt_dev->skb_priority;
2934 iph = ipv6_hdr(skb);
2935 udph = udp_hdr(skb);
2937 memcpy(eth, pkt_dev->hh, 12);
2938 *(__be16 *) ð[12] = protocol;
2940 /* Eth + IPh + UDPh + mpls */
2941 datalen = pkt_dev->cur_pkt_size - 14 -
2942 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2943 pkt_dev->pkt_overhead;
2945 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2946 datalen = sizeof(struct pktgen_hdr);
2947 net_info_ratelimited("increased datalen to %d\n", datalen);
2950 udph->source = htons(pkt_dev->cur_udp_src);
2951 udph->dest = htons(pkt_dev->cur_udp_dst);
2952 udph->len = htons(datalen + sizeof(struct udphdr));
2953 udph->check = 0; /* No checksum */
2955 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2957 if (pkt_dev->traffic_class) {
2958 /* Version + traffic class + flow (0) */
2959 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2962 iph->hop_limit = 32;
2964 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2965 iph->nexthdr = IPPROTO_UDP;
2967 iph->daddr = pkt_dev->cur_in6_daddr;
2968 iph->saddr = pkt_dev->cur_in6_saddr;
2970 skb->mac_header = (skb->network_header - ETH_HLEN -
2971 pkt_dev->pkt_overhead);
2972 skb->protocol = protocol;
2974 skb->pkt_type = PACKET_HOST;
2976 pktgen_finalize_skb(pkt_dev, skb, datalen);
2981 static struct sk_buff *fill_packet(struct net_device *odev,
2982 struct pktgen_dev *pkt_dev)
2984 if (pkt_dev->flags & F_IPV6)
2985 return fill_packet_ipv6(odev, pkt_dev);
2987 return fill_packet_ipv4(odev, pkt_dev);
2990 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2992 pkt_dev->seq_num = 1;
2993 pkt_dev->idle_acc = 0;
2995 pkt_dev->tx_bytes = 0;
2996 pkt_dev->errors = 0;
2999 /* Set up structure for sending pkts, clear counters */
3001 static void pktgen_run(struct pktgen_thread *t)
3003 struct pktgen_dev *pkt_dev;
3009 list_for_each_entry(pkt_dev, &t->if_list, list) {
3012 * setup odev and create initial packet.
3014 pktgen_setup_inject(pkt_dev);
3016 if (pkt_dev->odev) {
3017 pktgen_clear_counters(pkt_dev);
3018 pkt_dev->running = 1; /* Cranke yeself! */
3019 pkt_dev->skb = NULL;
3020 pkt_dev->started_at =
3021 pkt_dev->next_tx = ktime_now();
3023 set_pkt_overhead(pkt_dev);
3025 strcpy(pkt_dev->result, "Starting");
3028 strcpy(pkt_dev->result, "Error starting");
3032 t->control &= ~(T_STOP);
3035 static void pktgen_stop_all_threads_ifs(void)
3037 struct pktgen_thread *t;
3041 mutex_lock(&pktgen_thread_lock);
3043 list_for_each_entry(t, &pktgen_threads, th_list)
3044 t->control |= T_STOP;
3046 mutex_unlock(&pktgen_thread_lock);
3049 static int thread_is_running(const struct pktgen_thread *t)
3051 const struct pktgen_dev *pkt_dev;
3053 list_for_each_entry(pkt_dev, &t->if_list, list)
3054 if (pkt_dev->running)
3059 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3063 while (thread_is_running(t)) {
3067 msleep_interruptible(100);
3069 if (signal_pending(current))
3079 static int pktgen_wait_all_threads_run(void)
3081 struct pktgen_thread *t;
3084 mutex_lock(&pktgen_thread_lock);
3086 list_for_each_entry(t, &pktgen_threads, th_list) {
3087 sig = pktgen_wait_thread_run(t);
3093 list_for_each_entry(t, &pktgen_threads, th_list)
3094 t->control |= (T_STOP);
3096 mutex_unlock(&pktgen_thread_lock);
3100 static void pktgen_run_all_threads(void)
3102 struct pktgen_thread *t;
3106 mutex_lock(&pktgen_thread_lock);
3108 list_for_each_entry(t, &pktgen_threads, th_list)
3109 t->control |= (T_RUN);
3111 mutex_unlock(&pktgen_thread_lock);
3113 /* Propagate thread->control */
3114 schedule_timeout_interruptible(msecs_to_jiffies(125));
3116 pktgen_wait_all_threads_run();
3119 static void pktgen_reset_all_threads(void)
3121 struct pktgen_thread *t;
3125 mutex_lock(&pktgen_thread_lock);
3127 list_for_each_entry(t, &pktgen_threads, th_list)
3128 t->control |= (T_REMDEVALL);
3130 mutex_unlock(&pktgen_thread_lock);
3132 /* Propagate thread->control */
3133 schedule_timeout_interruptible(msecs_to_jiffies(125));
3135 pktgen_wait_all_threads_run();
3138 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3140 __u64 bps, mbps, pps;
3141 char *p = pkt_dev->result;
3142 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3143 pkt_dev->started_at);
3144 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3146 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3147 (unsigned long long)ktime_to_us(elapsed),
3148 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3149 (unsigned long long)ktime_to_us(idle),
3150 (unsigned long long)pkt_dev->sofar,
3151 pkt_dev->cur_pkt_size, nr_frags);
3153 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3154 ktime_to_ns(elapsed));
3156 bps = pps * 8 * pkt_dev->cur_pkt_size;
3159 do_div(mbps, 1000000);
3160 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3161 (unsigned long long)pps,
3162 (unsigned long long)mbps,
3163 (unsigned long long)bps,
3164 (unsigned long long)pkt_dev->errors);
3167 /* Set stopped-at timer, remove from running list, do counters & statistics */
3168 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3170 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3172 if (!pkt_dev->running) {
3173 pr_warning("interface: %s is already stopped\n",
3178 kfree_skb(pkt_dev->skb);
3179 pkt_dev->skb = NULL;
3180 pkt_dev->stopped_at = ktime_now();
3181 pkt_dev->running = 0;
3183 show_results(pkt_dev, nr_frags);
3188 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3190 struct pktgen_dev *pkt_dev, *best = NULL;
3194 list_for_each_entry(pkt_dev, &t->if_list, list) {
3195 if (!pkt_dev->running)
3199 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3206 static void pktgen_stop(struct pktgen_thread *t)
3208 struct pktgen_dev *pkt_dev;
3214 list_for_each_entry(pkt_dev, &t->if_list, list) {
3215 pktgen_stop_device(pkt_dev);
3222 * one of our devices needs to be removed - find it
3225 static void pktgen_rem_one_if(struct pktgen_thread *t)
3227 struct list_head *q, *n;
3228 struct pktgen_dev *cur;
3234 list_for_each_safe(q, n, &t->if_list) {
3235 cur = list_entry(q, struct pktgen_dev, list);
3237 if (!cur->removal_mark)
3240 kfree_skb(cur->skb);
3243 pktgen_remove_device(t, cur);
3251 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3253 struct list_head *q, *n;
3254 struct pktgen_dev *cur;
3258 /* Remove all devices, free mem */
3262 list_for_each_safe(q, n, &t->if_list) {
3263 cur = list_entry(q, struct pktgen_dev, list);
3265 kfree_skb(cur->skb);
3268 pktgen_remove_device(t, cur);
3274 static void pktgen_rem_thread(struct pktgen_thread *t)
3276 /* Remove from the thread list */
3278 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3282 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3284 ktime_t idle_start = ktime_now();
3286 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3289 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3291 ktime_t idle_start = ktime_now();
3293 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3294 if (signal_pending(current))
3298 pktgen_resched(pkt_dev);
3302 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3305 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3307 struct net_device *odev = pkt_dev->odev;
3308 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3309 = odev->netdev_ops->ndo_start_xmit;
3310 struct netdev_queue *txq;
3314 /* If device is offline, then don't send */
3315 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3316 pktgen_stop_device(pkt_dev);
3320 /* This is max DELAY, this has special meaning of
3323 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3324 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3328 /* If no skb or clone count exhausted then get new one */
3329 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3330 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3331 /* build a new pkt */
3332 kfree_skb(pkt_dev->skb);
3334 pkt_dev->skb = fill_packet(odev, pkt_dev);
3335 if (pkt_dev->skb == NULL) {
3336 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3338 pkt_dev->clone_count--; /* back out increment, OOM */
3341 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3342 pkt_dev->allocated_skbs++;
3343 pkt_dev->clone_count = 0; /* reset counter */
3346 if (pkt_dev->delay && pkt_dev->last_ok)
3347 spin(pkt_dev, pkt_dev->next_tx);
3349 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3350 txq = netdev_get_tx_queue(odev, queue_map);
3352 __netif_tx_lock_bh(txq);
3354 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3355 ret = NETDEV_TX_BUSY;
3356 pkt_dev->last_ok = 0;
3359 atomic_inc(&(pkt_dev->skb->users));
3360 ret = (*xmit)(pkt_dev->skb, odev);
3364 txq_trans_update(txq);
3365 pkt_dev->last_ok = 1;
3368 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3372 case NET_XMIT_POLICED:
3373 /* skb has been consumed */
3376 default: /* Drivers are not supposed to return other values! */
3377 net_info_ratelimited("%s xmit error: %d\n",
3378 pkt_dev->odevname, ret);
3381 case NETDEV_TX_LOCKED:
3382 case NETDEV_TX_BUSY:
3383 /* Retry it next time */
3384 atomic_dec(&(pkt_dev->skb->users));
3385 pkt_dev->last_ok = 0;
3388 __netif_tx_unlock_bh(txq);
3390 /* If pkt_dev->count is zero, then run forever */
3391 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3392 pktgen_wait_for_skb(pkt_dev);
3394 /* Done with this */
3395 pktgen_stop_device(pkt_dev);
3400 * Main loop of the thread goes here
3403 static int pktgen_thread_worker(void *arg)
3406 struct pktgen_thread *t = arg;
3407 struct pktgen_dev *pkt_dev = NULL;
3410 BUG_ON(smp_processor_id() != cpu);
3412 init_waitqueue_head(&t->queue);
3413 complete(&t->start_done);
3415 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3417 set_current_state(TASK_INTERRUPTIBLE);
3421 while (!kthread_should_stop()) {
3422 pkt_dev = next_to_run(t);
3424 if (unlikely(!pkt_dev && t->control == 0)) {
3427 wait_event_interruptible_timeout(t->queue,
3434 __set_current_state(TASK_RUNNING);
3436 if (likely(pkt_dev)) {
3437 pktgen_xmit(pkt_dev);
3440 pktgen_resched(pkt_dev);
3445 if (t->control & T_STOP) {
3447 t->control &= ~(T_STOP);
3450 if (t->control & T_RUN) {
3452 t->control &= ~(T_RUN);
3455 if (t->control & T_REMDEVALL) {
3456 pktgen_rem_all_ifs(t);
3457 t->control &= ~(T_REMDEVALL);
3460 if (t->control & T_REMDEV) {
3461 pktgen_rem_one_if(t);
3462 t->control &= ~(T_REMDEV);
3467 set_current_state(TASK_INTERRUPTIBLE);
3470 pr_debug("%s stopping all device\n", t->tsk->comm);
3473 pr_debug("%s removing all device\n", t->tsk->comm);
3474 pktgen_rem_all_ifs(t);
3476 pr_debug("%s removing thread\n", t->tsk->comm);
3477 pktgen_rem_thread(t);
3479 /* Wait for kthread_stop */
3480 while (!kthread_should_stop()) {
3481 set_current_state(TASK_INTERRUPTIBLE);
3484 __set_current_state(TASK_RUNNING);
3489 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3490 const char *ifname, bool exact)
3492 struct pktgen_dev *p, *pkt_dev = NULL;
3493 size_t len = strlen(ifname);
3496 list_for_each_entry(p, &t->if_list, list)
3497 if (strncmp(p->odevname, ifname, len) == 0) {
3498 if (p->odevname[len]) {
3499 if (exact || p->odevname[len] != '@')
3507 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3512 * Adds a dev at front of if_list.
3515 static int add_dev_to_thread(struct pktgen_thread *t,
3516 struct pktgen_dev *pkt_dev)
3522 if (pkt_dev->pg_thread) {
3523 pr_err("ERROR: already assigned to a thread\n");
3528 list_add(&pkt_dev->list, &t->if_list);
3529 pkt_dev->pg_thread = t;
3530 pkt_dev->running = 0;
3537 /* Called under thread lock */
3539 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3541 struct pktgen_dev *pkt_dev;
3543 int node = cpu_to_node(t->cpu);
3545 /* We don't allow a device to be on several threads */
3547 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3549 pr_err("ERROR: interface already used\n");
3553 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3557 strcpy(pkt_dev->odevname, ifname);
3558 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3560 if (pkt_dev->flows == NULL) {
3565 pkt_dev->removal_mark = 0;
3566 pkt_dev->nfrags = 0;
3567 pkt_dev->delay = pg_delay_d;
3568 pkt_dev->count = pg_count_d;
3570 pkt_dev->udp_src_min = 9; /* sink port */
3571 pkt_dev->udp_src_max = 9;
3572 pkt_dev->udp_dst_min = 9;
3573 pkt_dev->udp_dst_max = 9;
3574 pkt_dev->vlan_p = 0;
3575 pkt_dev->vlan_cfi = 0;
3576 pkt_dev->vlan_id = 0xffff;
3577 pkt_dev->svlan_p = 0;
3578 pkt_dev->svlan_cfi = 0;
3579 pkt_dev->svlan_id = 0xffff;
3582 err = pktgen_setup_dev(pkt_dev, ifname);
3585 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3586 pkt_dev->clone_skb = pg_clone_skb_d;
3588 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3589 &pktgen_if_fops, pkt_dev);
3590 if (!pkt_dev->entry) {
3591 pr_err("cannot create %s/%s procfs entry\n",
3592 PG_PROC_DIR, ifname);
3597 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3598 pkt_dev->ipsproto = IPPROTO_ESP;
3601 return add_dev_to_thread(t, pkt_dev);
3603 dev_put(pkt_dev->odev);
3608 vfree(pkt_dev->flows);
3613 static int __init pktgen_create_thread(int cpu)
3615 struct pktgen_thread *t;
3616 struct proc_dir_entry *pe;
3617 struct task_struct *p;
3619 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3622 pr_err("ERROR: out of memory, can't create new thread\n");
3626 spin_lock_init(&t->if_lock);
3629 INIT_LIST_HEAD(&t->if_list);
3631 list_add_tail(&t->th_list, &pktgen_threads);
3632 init_completion(&t->start_done);
3634 p = kthread_create_on_node(pktgen_thread_worker,
3637 "kpktgend_%d", cpu);
3639 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3640 list_del(&t->th_list);
3644 kthread_bind(p, cpu);
3647 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3648 &pktgen_thread_fops, t);
3650 pr_err("cannot create %s/%s procfs entry\n",
3651 PG_PROC_DIR, t->tsk->comm);
3653 list_del(&t->th_list);
3659 wait_for_completion(&t->start_done);
3665 * Removes a device from the thread if_list.
3667 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3668 struct pktgen_dev *pkt_dev)
3670 struct list_head *q, *n;
3671 struct pktgen_dev *p;
3673 list_for_each_safe(q, n, &t->if_list) {
3674 p = list_entry(q, struct pktgen_dev, list);
3680 static int pktgen_remove_device(struct pktgen_thread *t,
3681 struct pktgen_dev *pkt_dev)
3684 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3686 if (pkt_dev->running) {
3687 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3688 pktgen_stop_device(pkt_dev);
3691 /* Dis-associate from the interface */
3693 if (pkt_dev->odev) {
3694 dev_put(pkt_dev->odev);
3695 pkt_dev->odev = NULL;
3698 /* And update the thread if_list */
3700 _rem_dev_from_if_list(t, pkt_dev);
3703 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3708 vfree(pkt_dev->flows);
3710 put_page(pkt_dev->page);
3715 static int __init pg_init(void)
3718 struct proc_dir_entry *pe;
3721 pr_info("%s", version);
3723 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3727 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3729 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3734 register_netdevice_notifier(&pktgen_notifier_block);
3736 for_each_online_cpu(cpu) {
3739 err = pktgen_create_thread(cpu);
3741 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3745 if (list_empty(&pktgen_threads)) {
3746 pr_err("ERROR: Initialization failed for all threads\n");
3754 unregister_netdevice_notifier(&pktgen_notifier_block);
3755 remove_proc_entry(PGCTRL, pg_proc_dir);
3757 proc_net_remove(&init_net, PG_PROC_DIR);
3761 static void __exit pg_cleanup(void)
3763 struct pktgen_thread *t;
3764 struct list_head *q, *n;
3767 /* Stop all interfaces & threads */
3768 pktgen_exiting = true;
3770 mutex_lock(&pktgen_thread_lock);
3771 list_splice_init(&pktgen_threads, &list);
3772 mutex_unlock(&pktgen_thread_lock);
3774 list_for_each_safe(q, n, &list) {
3775 t = list_entry(q, struct pktgen_thread, th_list);
3776 list_del(&t->th_list);
3777 kthread_stop(t->tsk);
3781 /* Un-register us from receiving netdevice events */
3782 unregister_netdevice_notifier(&pktgen_notifier_block);
3784 /* Clean up proc file system */
3785 remove_proc_entry(PGCTRL, pg_proc_dir);
3786 proc_net_remove(&init_net, PG_PROC_DIR);
3789 module_init(pg_init);
3790 module_exit(pg_cleanup);
3792 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3793 MODULE_DESCRIPTION("Packet Generator tool");
3794 MODULE_LICENSE("GPL");
3795 MODULE_VERSION(VERSION);
3796 module_param(pg_count_d, int, 0);
3797 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3798 module_param(pg_delay_d, int, 0);
3799 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3800 module_param(pg_clone_skb_d, int, 0);
3801 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3802 module_param(debug, int, 0);
3803 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");