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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[mirror_ubuntu-jammy-kernel.git] / net / core / pktgen.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * Authors:
4 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
5 * Uppsala University and
6 * Swedish University of Agricultural Sciences
7 *
8 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * Ben Greear <greearb@candelatech.com>
96de0e25 10 * Jens Låås <jens.laas@data.slu.se>
1da177e4 11 *
1da177e4 12 * A tool for loading the network with preconfigurated packets.
4ec93edb 13 * The tool is implemented as a linux module. Parameters are output
1da177e4
LT		 14 * device, delay (to hard_xmit), number of packets, and whether
15 * to use multiple SKBs or just the same one.
16 * pktgen uses the installed interface's output routine.
17 *
18 * Additional hacking by:
19 *
20 * Jens.Laas@data.slu.se
21 * Improved by ANK. 010120.
22 * Improved by ANK even more. 010212.
23 * MAC address typo fixed. 010417 --ro
24 * Integrated. 020301 --DaveM
25 * Added multiskb option 020301 --DaveM
26 * Scaling of results. 020417--sigurdur@linpro.no
27 * Significant re-work of the module:
28 * * Convert to threaded model to more efficiently be able to transmit
29 * and receive on multiple interfaces at once.
30 * * Converted many counters to __u64 to allow longer runs.
31 * * Allow configuration of ranges, like min/max IP address, MACs,
32 * and UDP-ports, for both source and destination, and can
33 * set to use a random distribution or sequentially walk the range.
34 * * Can now change most values after starting.
35 * * Place 12-byte packet in UDP payload with magic number,
36 * sequence number, and timestamp.
37 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
38 * latencies (with micro-second) precision.
39 * * Add IOCTL interface to easily get counters & configuration.
40 * --Ben Greear <greearb@candelatech.com>
41 *
4ec93edb
YH		 42 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
43 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
1da177e4 44 * as a "fastpath" with a configurable number of clones after alloc's.
4ec93edb
YH		 45 * clone_skb=0 means all packets are allocated this also means ranges time
46 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
1da177e4
LT		 47 * clones.
48 *
4ec93edb 49 * Also moved to /proc/net/pktgen/
1da177e4
LT		 50 * --ro
51 *
52 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
53 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
54 * --Ben Greear <greearb@candelatech.com>
55 *
56 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
57 *
1da177e4 58 * 021124 Finished major redesign and rewrite for new functionality.
c1e4535f 59 * See Documentation/networking/pktgen.rst for how to use this.
1da177e4
LT		 60 *
61 * The new operation:
4ec93edb
YH		 62 * For each CPU one thread/process is created at start. This process checks
63 * for running devices in the if_list and sends packets until count is 0 it
64 * also the thread checks the thread->control which is used for inter-process
65 * communication. controlling process "posts" operations to the threads this
8788370a
JDB		 66 * way.
67 * The if_list is RCU protected, and the if_lock remains to protect updating
68 * of if_list, from "add_device" as it invoked from userspace (via proc write).
1da177e4 69 *
4ec93edb
YH		 70 * By design there should only be *one* "controlling" process. In practice
71 * multiple write accesses gives unpredictable result. Understood by "write"
1da177e4 72 * to /proc gives result code thats should be read be the "writer".
b4099fab 73 * For practical use this should be no problem.
1da177e4 74 *
4ec93edb
YH		 75 * Note when adding devices to a specific CPU there good idea to also assign
76 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
1da177e4
LT		 77 * --ro
78 *
4ec93edb 79 * Fix refcount off by one if first packet fails, potential null deref,
1da177e4
LT		 80 * memleak 030710- KJP
81 *
82 * First "ranges" functionality for ipv6 030726 --ro
83 *
84 * Included flow support. 030802 ANK.
85 *
86 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
4ec93edb 87 *
1da177e4
LT		 88 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
89 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
90 *
4ec93edb 91 * New xmit() return, do_div and misc clean up by Stephen Hemminger
1da177e4
LT		 92 * <shemminger@osdl.org> 040923
93 *
ca9f1fd2 94 * Randy Dunlap fixed u64 printk compiler warning
1da177e4
LT		 95 *
96 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
97 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
98 *
4ec93edb 99 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
1da177e4
LT		 100 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
101 *
4ec93edb 102 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
1da177e4 103 * 050103
ca6549af
SW		 104 *
105 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
106 *
34954ddc
FF		 107 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
108 *
ce5d0b47
AR		 109 * Fixed src_mac command to set source mac of packet to value specified in
110 * command by Adit Ranadive <adit.262@gmail.com>
1da177e4 111 */
f9467eae
JP		 112
113#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
114
1da177e4
LT		 115#include <linux/sys.h>
116#include <linux/types.h>
117#include <linux/module.h>
118#include <linux/moduleparam.h>
119#include <linux/kernel.h>
222fa076 120#include <linux/mutex.h>
1da177e4
LT		 121#include <linux/sched.h>
122#include <linux/slab.h>
123#include <linux/vmalloc.h>
1da177e4
LT		 124#include <linux/unistd.h>
125#include <linux/string.h>
126#include <linux/ptrace.h>
127#include <linux/errno.h>
128#include <linux/ioport.h>
129#include <linux/interrupt.h>
4fc268d2 130#include <linux/capability.h>
2bc481cf 131#include <linux/hrtimer.h>
09fe3ef4 132#include <linux/freezer.h>
1da177e4
LT		 133#include <linux/delay.h>
134#include <linux/timer.h>
cdcdbe0b 135#include <linux/list.h>
1da177e4
LT		 136#include <linux/init.h>
137#include <linux/skbuff.h>
138#include <linux/netdevice.h>
139#include <linux/inet.h>
140#include <linux/inetdevice.h>
141#include <linux/rtnetlink.h>
142#include <linux/if_arp.h>
34954ddc 143#include <linux/if_vlan.h>
1da177e4
LT		 144#include <linux/in.h>
145#include <linux/ip.h>
146#include <linux/ipv6.h>
147#include <linux/udp.h>
148#include <linux/proc_fs.h>
d50a6b56 149#include <linux/seq_file.h>
1da177e4 150#include <linux/wait.h>
f404e9a6 151#include <linux/etherdevice.h>
ee74baa7 152#include <linux/kthread.h>
268bb0ce 153#include <linux/prefetch.h>
98fa15f3 154#include <linux/mmzone.h>
457c4cbc 155#include <net/net_namespace.h>
1da177e4
LT		 156#include <net/checksum.h>
157#include <net/ipv6.h>
c26bf4a5 158#include <net/udp.h>
73d94e94 159#include <net/ip6_checksum.h>
1da177e4 160#include <net/addrconf.h>
a553e4a6
JHS		 161#ifdef CONFIG_XFRM
162#include <net/xfrm.h>
163#endif
4e58a027 164#include <net/netns/generic.h>
1da177e4
LT		 165#include <asm/byteorder.h>
166#include <linux/rcupdate.h>
1977f032 167#include <linux/bitops.h>
63adc6fb
SH		 168#include <linux/io.h>
169#include <linux/timex.h>
170#include <linux/uaccess.h>
1da177e4 171#include <asm/dma.h>
222f1806 172#include <asm/div64.h> /* do_div */
1da177e4 173
40207264 174#define VERSION "2.75"
1da177e4 175#define IP_NAME_SZ 32
ca6549af 176#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
d5f1ce9a 177#define MPLS_STACK_BOTTOM htonl(0x00000100)
52a62f86
NR		 178/* Max number of internet mix entries that can be specified in imix_weights. */
179#define MAX_IMIX_ENTRIES 20
90149031 180#define IMIX_PRECISION 100 /* Precision of IMIX distribution */
1da177e4 181
f9467eae
JP		 182#define func_enter() pr_debug("entering %s\n", __func__);
183
6f107c74
DS		 184#define PKT_FLAGS \
185 pf(IPV6) /* Interface in IPV6 Mode */ \
186 pf(IPSRC_RND) /* IP-Src Random */ \
187 pf(IPDST_RND) /* IP-Dst Random */ \
188 pf(TXSIZE_RND) /* Transmit size is random */ \
189 pf(UDPSRC_RND) /* UDP-Src Random */ \
190 pf(UDPDST_RND) /* UDP-Dst Random */ \
191 pf(UDPCSUM) /* Include UDP checksum */ \
192 pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \
193 pf(MPLS_RND) /* Random MPLS labels */ \
194 pf(QUEUE_MAP_RND) /* queue map Random */ \
195 pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \
196 pf(FLOW_SEQ) /* Sequential flows */ \
197 pf(IPSEC) /* ipsec on for flows */ \
198 pf(MACSRC_RND) /* MAC-Src Random */ \
199 pf(MACDST_RND) /* MAC-Dst Random */ \
200 pf(VID_RND) /* Random VLAN ID */ \
201 pf(SVID_RND) /* Random SVLAN ID */ \
202 pf(NODE) /* Node memory alloc*/ \
203
204#define pf(flag) flag##_SHIFT,
205enum pkt_flags {
206 PKT_FLAGS
207};
208#undef pf
209
1da177e4 210/* Device flag bits */
6f107c74
DS		 211#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
212PKT_FLAGS
213#undef pf
1da177e4 214
99c6d3d2
DS		 215#define pf(flag) __stringify(flag),
216static char *pkt_flag_names[] = {
217 PKT_FLAGS
218};
219#undef pf
220
221#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
222
1da177e4 223/* Thread control flag bits */
6b80d6a6
SH		 224#define T_STOP (1<<0) /* Stop run */
225#define T_RUN (1<<1) /* Start run */
226#define T_REMDEVALL (1<<2) /* Remove all devs */
227#define T_REMDEV (1<<3) /* Remove one dev */
1da177e4 228
62f64aed
AS		 229/* Xmit modes */
230#define M_START_XMIT 0 /* Default normal TX */
231#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
0967f244 232#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
62f64aed 233
8788370a 234/* If lock -- protects updating of if_list */
9a0b1e8b
ED		 235#define if_lock(t) mutex_lock(&(t->if_lock));
236#define if_unlock(t) mutex_unlock(&(t->if_lock));
1da177e4
LT		 237
238/* Used to help with determining the pkts on receive */
239#define PKTGEN_MAGIC 0xbe9be955
d50a6b56
SH		 240#define PG_PROC_DIR "pktgen"
241#define PGCTRL "pgctrl"
1da177e4
LT		 242
243#define MAX_CFLOWS 65536
244
34954ddc
FF		 245#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
246#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
247
52a62f86
NR		 248struct imix_pkt {
249 u64 size;
250 u64 weight;
251 u64 count_so_far;
252};
253
222f1806 254struct flow_state {
252e3346 255 __be32 cur_daddr;
222f1806 256 int count;
a553e4a6
JHS		 257#ifdef CONFIG_XFRM
258 struct xfrm_state *x;
259#endif
007a531b 260 __u32 flags;
1da177e4
LT		 261};
262
007a531b
JHS		 263/* flow flag bits */
264#define F_INIT (1<<0) /* flow has been initialized */
265
1da177e4 266struct pktgen_dev {
1da177e4
LT		 267 /*
268 * Try to keep frequent/infrequent used vars. separated.
269 */
39df232f
SH		 270 struct proc_dir_entry *entry; /* proc file */
271 struct pktgen_thread *pg_thread;/* the owner */
63adc6fb 272 struct list_head list; /* chaining in the thread's run-queue */
8788370a 273 struct rcu_head rcu; /* freed by RCU */
1da177e4 274
63adc6fb 275 int running; /* if false, the test will stop */
1da177e4 276
222f1806
LC		 277 /* If min != max, then we will either do a linear iteration, or
278 * we will do a random selection from within the range.
279 */
280 __u32 flags;
62f64aed 281 int xmit_mode;
68bf9f0b
AW		 282 int min_pkt_size;
283 int max_pkt_size;
16dab72f 284 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
222f1806 285 int nfrags;
62f64aed
AS		 286 int removal_mark; /* non-zero => the device is marked for
287 * removal by worker thread */
288
26ad7879 289 struct page *page;
fd29cf72
SH		 290 u64 delay; /* nano-seconds */
291
222f1806
LC		 292 __u64 count; /* Default No packets to send */
293 __u64 sofar; /* How many pkts we've sent so far */
294 __u64 tx_bytes; /* How many bytes we've transmitted */
f466dba1 295 __u64 errors; /* Errors when trying to transmit, */
222f1806
LC		 296
297 /* runtime counters relating to clone_skb */
222f1806 298
222f1806
LC		 299 __u32 clone_count;
300 int last_ok; /* Was last skb sent?
63adc6fb
SH		 301 * Or a failed transmit of some sort?
302 * This will keep sequence numbers in order
222f1806 303 */
fd29cf72
SH		 304 ktime_t next_tx;
305 ktime_t started_at;
306 ktime_t stopped_at;
307 u64 idle_acc; /* nano-seconds */
308
222f1806
LC		 309 __u32 seq_num;
310
63adc6fb
SH		 311 int clone_skb; /*
312 * Use multiple SKBs during packet gen.
313 * If this number is greater than 1, then
314 * that many copies of the same packet will be
315 * sent before a new packet is allocated.
316 * If you want to send 1024 identical packets
317 * before creating a new packet,
318 * set clone_skb to 1024.
222f1806
LC		 319 */
320
321 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
322 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
323 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
324 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
325
326 struct in6_addr in6_saddr;
327 struct in6_addr in6_daddr;
328 struct in6_addr cur_in6_daddr;
329 struct in6_addr cur_in6_saddr;
1da177e4 330 /* For ranges */
222f1806
LC		 331 struct in6_addr min_in6_daddr;
332 struct in6_addr max_in6_daddr;
333 struct in6_addr min_in6_saddr;
334 struct in6_addr max_in6_saddr;
335
336 /* If we're doing ranges, random or incremental, then this
337 * defines the min/max for those ranges.
338 */
252e3346
AV		 339 __be32 saddr_min; /* inclusive, source IP address */
340 __be32 saddr_max; /* exclusive, source IP address */
341 __be32 daddr_min; /* inclusive, dest IP address */
342 __be32 daddr_max; /* exclusive, dest IP address */
222f1806
LC		 343
344 __u16 udp_src_min; /* inclusive, source UDP port */
345 __u16 udp_src_max; /* exclusive, source UDP port */
346 __u16 udp_dst_min; /* inclusive, dest UDP port */
347 __u16 udp_dst_max; /* exclusive, dest UDP port */
348
1ca7768c 349 /* DSCP + ECN */
63adc6fb
SH		 350 __u8 tos; /* six MSB of (former) IPv4 TOS
351 are for dscp codepoint */
352 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
353 (see RFC 3260, sec. 4) */
1ca7768c 354
52a62f86
NR		 355 /* IMIX */
356 unsigned int n_imix_entries;
357 struct imix_pkt imix_entries[MAX_IMIX_ENTRIES];
90149031
NR		 358 /* Maps 0-IMIX_PRECISION range to imix_entry based on probability*/
359 __u8 imix_distribution[IMIX_PRECISION];
52a62f86 360
ca6549af 361 /* MPLS */
95c96174 362 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
ca6549af
SW		 363 __be32 labels[MAX_MPLS_LABELS];
364
34954ddc
FF		 365 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
366 __u8 vlan_p;
367 __u8 vlan_cfi;
368 __u16 vlan_id; /* 0xffff means no vlan tag */
369
370 __u8 svlan_p;
371 __u8 svlan_cfi;
372 __u16 svlan_id; /* 0xffff means no svlan tag */
373
222f1806
LC		 374 __u32 src_mac_count; /* How many MACs to iterate through */
375 __u32 dst_mac_count; /* How many MACs to iterate through */
376
377 unsigned char dst_mac[ETH_ALEN];
378 unsigned char src_mac[ETH_ALEN];
379
380 __u32 cur_dst_mac_offset;
381 __u32 cur_src_mac_offset;
252e3346
AV		 382 __be32 cur_saddr;
383 __be32 cur_daddr;
66ed1e5e 384 __u16 ip_id;
222f1806
LC		 385 __u16 cur_udp_dst;
386 __u16 cur_udp_src;
45b270f8 387 __u16 cur_queue_map;
222f1806 388 __u32 cur_pkt_size;
baac8564 389 __u32 last_pkt_size;
222f1806
LC		 390
391 __u8 hh[14];
392 /* = {
393 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
394
395 We fill in SRC address later
396 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
397 0x08, 0x00
398 };
399 */
400 __u16 pad; /* pad out the hh struct to an even 16 bytes */
401
63adc6fb 402 struct sk_buff *skb; /* skb we are to transmit next, used for when we
222f1806
LC		 403 * are transmitting the same one multiple times
404 */
63adc6fb
SH		 405 struct net_device *odev; /* The out-going device.
406 * Note that the device should have it's
407 * pg_info pointer pointing back to this
408 * device.
409 * Set when the user specifies the out-going
410 * device name (not when the inject is
411 * started as it used to do.)
412 */
593f63b0 413 char odevname[32];
1da177e4 414 struct flow_state *flows;
95c96174
ED		 415 unsigned int cflows; /* Concurrent flows (config) */
416 unsigned int lflow; /* Flow length (config) */
417 unsigned int nflows; /* accumulated flows (stats) */
418 unsigned int curfl; /* current sequenced flow (state)*/
45b270f8
RO		 419
420 u16 queue_map_min;
421 u16 queue_map_max;
9e50e3ac 422 __u32 skb_priority; /* skb priority field */
38b2cf29 423 unsigned int burst; /* number of duplicated packets to burst */
e99b99b4 424 int node; /* Memory node */
45b270f8 425
a553e4a6
JHS		 426#ifdef CONFIG_XFRM
427 __u8 ipsmode; /* IPSEC mode (config) */
428 __u8 ipsproto; /* IPSEC type (config) */
de4aee7d 429 __u32 spi;
b6ca8bd5 430 struct xfrm_dst xdst;
cf93d47e 431 struct dst_ops dstops;
a553e4a6 432#endif
39df232f 433 char result[512];
1da177e4
LT		 434};
435
436struct pktgen_hdr {
252e3346
AV		 437 __be32 pgh_magic;
438 __be32 seq_num;
439 __be32 tv_sec;
440 __be32 tv_usec;
1da177e4
LT		 441};
442
4e58a027 443
c7d03a00 444static unsigned int pg_net_id __read_mostly;
4e58a027
CW		 445
446struct pktgen_net {
447 struct net *net;
448 struct proc_dir_entry *proc_dir;
449 struct list_head pktgen_threads;
450 bool pktgen_exiting;
451};
551eaff1 452
1da177e4 453struct pktgen_thread {
9a0b1e8b 454 struct mutex if_lock; /* for list of devices */
c26a8016 455 struct list_head if_list; /* All device here */
cdcdbe0b 456 struct list_head th_list;
ee74baa7 457 struct task_struct *tsk;
222f1806 458 char result[512];
222f1806 459
63adc6fb
SH		 460 /* Field for thread to receive "posted" events terminate,
461 stop ifs etc. */
222f1806
LC		 462
463 u32 control;
1da177e4
LT		 464 int cpu;
465
222f1806 466 wait_queue_head_t queue;
d3ede327 467 struct completion start_done;
4e58a027 468 struct pktgen_net *net;
1da177e4
LT		 469};
470
471#define REMOVE 1
472#define FIND 0
473
c3d2f52d 474static const char version[] =
f9467eae
JP		 475 "Packet Generator for packet performance testing. "
476 "Version: " VERSION "\n";
1da177e4 477
222f1806
LC		 478static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
479static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
480static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3e984840 481 const char *ifname, bool exact);
1da177e4 482static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
4e58a027
CW		 483static void pktgen_run_all_threads(struct pktgen_net *pn);
484static void pktgen_reset_all_threads(struct pktgen_net *pn);
cda9de0b 485static void pktgen_stop_all_threads(struct pktgen_net *pn);
3bda06a3 486
222f1806 487static void pktgen_stop(struct pktgen_thread *t);
1da177e4 488static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
90149031 489static void fill_imix_distribution(struct pktgen_dev *pkt_dev);
39df232f 490
1da177e4 491/* Module parameters, defaults. */
65c5b786
SH		 492static int pg_count_d __read_mostly = 1000;
493static int pg_delay_d __read_mostly;
494static int pg_clone_skb_d __read_mostly;
495static int debug __read_mostly;
1da177e4 496
222fa076 497static DEFINE_MUTEX(pktgen_thread_lock);
1da177e4 498
1da177e4
LT		 499static struct notifier_block pktgen_notifier_block = {
500 .notifier_call = pktgen_device_event,
501};
502
1da177e4 503/*
4ec93edb 504 * /proc handling functions
1da177e4
LT		 505 *
506 */
507
d50a6b56 508static int pgctrl_show(struct seq_file *seq, void *v)
222f1806 509{
c3d2f52d 510 seq_puts(seq, version);
d50a6b56 511 return 0;
1da177e4
LT		 512}
513
63adc6fb
SH		 514static ssize_t pgctrl_write(struct file *file, const char __user *buf,
515 size_t count, loff_t *ppos)
1da177e4 516{
d50a6b56 517 char data[128];
4e58a027 518 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
1da177e4 519
09455747
MK		 520 if (!capable(CAP_NET_ADMIN))
521 return -EPERM;
1da177e4 522
20b0c718
MK		 523 if (count == 0)
524 return -EINVAL;
525
d50a6b56
SH		 526 if (count > sizeof(data))
527 count = sizeof(data);
1da177e4 528
09455747
MK		 529 if (copy_from_user(data, buf, count))
530 return -EFAULT;
531
20b0c718 532 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
1da177e4 533
222f1806 534 if (!strcmp(data, "stop"))
cda9de0b 535 pktgen_stop_all_threads(pn);
222f1806 536 else if (!strcmp(data, "start"))
4e58a027 537 pktgen_run_all_threads(pn);
eb37b41c 538 else if (!strcmp(data, "reset"))
4e58a027 539 pktgen_reset_all_threads(pn);
222f1806 540 else
40207264 541 return -EINVAL;
1da177e4 542
09455747 543 return count;
1da177e4
LT		 544}
545
d50a6b56
SH		 546static int pgctrl_open(struct inode *inode, struct file *file)
547{
d9dda78b 548 return single_open(file, pgctrl_show, PDE_DATA(inode));
d50a6b56
SH		 549}
550
97a32539
AD		 551static const struct proc_ops pktgen_proc_ops = {
552 .proc_open = pgctrl_open,
553 .proc_read = seq_read,
554 .proc_lseek = seq_lseek,
555 .proc_write = pgctrl_write,
556 .proc_release = single_release,
d50a6b56
SH		 557};
558
559static int pktgen_if_show(struct seq_file *seq, void *v)
1da177e4 560{
648fda74 561 const struct pktgen_dev *pkt_dev = seq->private;
fd29cf72 562 ktime_t stopped;
99c6d3d2 563 unsigned int i;
fd29cf72 564 u64 idle;
222f1806
LC		 565
566 seq_printf(seq,
567 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
568 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
569 pkt_dev->max_pkt_size);
570
52a62f86
NR		 571 if (pkt_dev->n_imix_entries > 0) {
572 seq_puts(seq, " imix_weights: ");
573 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
574 seq_printf(seq, "%llu,%llu ",
575 pkt_dev->imix_entries[i].size,
576 pkt_dev->imix_entries[i].weight);
577 }
578 seq_puts(seq, "\n");
579 }
580
222f1806 581 seq_printf(seq,
fd29cf72
SH		 582 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
583 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
593f63b0 584 pkt_dev->clone_skb, pkt_dev->odevname);
222f1806
LC		 585
586 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
587 pkt_dev->lflow);
588
45b270f8
RO		 589 seq_printf(seq,
590 " queue_map_min: %u queue_map_max: %u\n",
591 pkt_dev->queue_map_min,
592 pkt_dev->queue_map_max);
593
9e50e3ac
JF		 594 if (pkt_dev->skb_priority)
595 seq_printf(seq, " skb_priority: %u\n",
596 pkt_dev->skb_priority);
597
222f1806 598 if (pkt_dev->flags & F_IPV6) {
222f1806 599 seq_printf(seq,
47a0200d
AD		 600 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
601 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
602 &pkt_dev->in6_saddr,
603 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
604 &pkt_dev->in6_daddr,
605 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
63adc6fb
SH		 606 } else {
607 seq_printf(seq,
608 " dst_min: %s dst_max: %s\n",
609 pkt_dev->dst_min, pkt_dev->dst_max);
222f1806 610 seq_printf(seq,
d079abd1 611 " src_min: %s src_max: %s\n",
63adc6fb
SH		 612 pkt_dev->src_min, pkt_dev->src_max);
613 }
1da177e4 614
222f1806 615 seq_puts(seq, " src_mac: ");
1da177e4 616
e174961c
JB		 617 seq_printf(seq, "%pM ",
618 is_zero_ether_addr(pkt_dev->src_mac) ?
619 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
222f1806 620
97dc48e2 621 seq_puts(seq, "dst_mac: ");
e174961c 622 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
222f1806
LC		 623
624 seq_printf(seq,
63adc6fb
SH		 625 " udp_src_min: %d udp_src_max: %d"
626 " udp_dst_min: %d udp_dst_max: %d\n",
222f1806
LC		 627 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
628 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
629
630 seq_printf(seq,
ca6549af 631 " src_mac_count: %d dst_mac_count: %d\n",
222f1806 632 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
1da177e4 633
ca6549af 634 if (pkt_dev->nr_labels) {
97dc48e2 635 seq_puts(seq, " mpls: ");
e71a4783 636 for (i = 0; i < pkt_dev->nr_labels; i++)
ca6549af
SW		 637 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
638 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
639 }
640
63adc6fb 641 if (pkt_dev->vlan_id != 0xffff)
34954ddc 642 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
63adc6fb
SH		 643 pkt_dev->vlan_id, pkt_dev->vlan_p,
644 pkt_dev->vlan_cfi);
34954ddc 645
63adc6fb 646 if (pkt_dev->svlan_id != 0xffff)
34954ddc 647 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
63adc6fb
SH		 648 pkt_dev->svlan_id, pkt_dev->svlan_p,
649 pkt_dev->svlan_cfi);
34954ddc 650
63adc6fb 651 if (pkt_dev->tos)
1ca7768c 652 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
1ca7768c 653
63adc6fb 654 if (pkt_dev->traffic_class)
1ca7768c 655 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
1ca7768c 656
38b2cf29
AS		 657 if (pkt_dev->burst > 1)
658 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
659
e99b99b4
RO		 660 if (pkt_dev->node >= 0)
661 seq_printf(seq, " node: %d\n", pkt_dev->node);
662
62f64aed
AS		 663 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
664 seq_puts(seq, " xmit_mode: netif_receive\n");
0967f244
JF		 665 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
666 seq_puts(seq, " xmit_mode: xmit_queue\n");
62f64aed 667
97dc48e2 668 seq_puts(seq, " Flags: ");
ca6549af 669
99c6d3d2
DS		 670 for (i = 0; i < NR_PKT_FLAGS; i++) {
671 if (i == F_FLOW_SEQ)
672 if (!pkt_dev->cflows)
673 continue;
afb84b62 674
99c6d3d2
DS		 675 if (pkt_dev->flags & (1 << i))
676 seq_printf(seq, "%s ", pkt_flag_names[i]);
677 else if (i == F_FLOW_SEQ)
678 seq_puts(seq, "FLOW_RND ");
007a531b 679
a553e4a6 680#ifdef CONFIG_XFRM
99c6d3d2 681 if (i == F_IPSEC && pkt_dev->spi)
8101328b 682 seq_printf(seq, "spi:%u", pkt_dev->spi);
a553e4a6 683#endif
99c6d3d2 684 }
e99b99b4 685
222f1806
LC		 686 seq_puts(seq, "\n");
687
fd29cf72 688 /* not really stopped, more like last-running-at */
398f382c 689 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
fd29cf72
SH		 690 idle = pkt_dev->idle_acc;
691 do_div(idle, NSEC_PER_USEC);
1da177e4 692
222f1806 693 seq_printf(seq,
fd29cf72 694 "Current:\n pkts-sofar: %llu errors: %llu\n",
222f1806 695 (unsigned long long)pkt_dev->sofar,
fd29cf72
SH		 696 (unsigned long long)pkt_dev->errors);
697
769afb3f
NR		 698 if (pkt_dev->n_imix_entries > 0) {
699 int i;
700
701 seq_puts(seq, " imix_size_counts: ");
702 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
703 seq_printf(seq, "%llu,%llu ",
704 pkt_dev->imix_entries[i].size,
705 pkt_dev->imix_entries[i].count_so_far);
706 }
707 seq_puts(seq, "\n");
708 }
709
fd29cf72
SH		 710 seq_printf(seq,
711 " started: %lluus stopped: %lluus idle: %lluus\n",
712 (unsigned long long) ktime_to_us(pkt_dev->started_at),
713 (unsigned long long) ktime_to_us(stopped),
714 (unsigned long long) idle);
1da177e4 715
222f1806
LC		 716 seq_printf(seq,
717 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
d50a6b56
SH		 718 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
719 pkt_dev->cur_src_mac_offset);
1da177e4 720
222f1806 721 if (pkt_dev->flags & F_IPV6) {
47a0200d
AD		 722 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
723 &pkt_dev->cur_in6_saddr,
724 &pkt_dev->cur_in6_daddr);
222f1806 725 } else
0373a946
AW		 726 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
727 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
1da177e4 728
222f1806 729 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
d50a6b56 730 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
1da177e4 731
45b270f8
RO		 732 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
733
222f1806 734 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
1da177e4
LT		 735
736 if (pkt_dev->result[0])
222f1806 737 seq_printf(seq, "Result: %s\n", pkt_dev->result);
1da177e4 738 else
97dc48e2 739 seq_puts(seq, "Result: Idle\n");
1da177e4 740
d50a6b56 741 return 0;
1da177e4
LT		 742}
743
ca6549af 744
63adc6fb
SH		 745static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
746 __u32 *num)
ca6549af
SW		 747{
748 int i = 0;
749 *num = 0;
750
e71a4783 751 for (; i < maxlen; i++) {
82fd5b5d 752 int value;
ca6549af
SW		 753 char c;
754 *num <<= 4;
755 if (get_user(c, &user_buffer[i]))
756 return -EFAULT;
82fd5b5d
AS		 757 value = hex_to_bin(c);
758 if (value >= 0)
759 *num |= value;
ca6549af
SW		 760 else
761 break;
762 }
763 return i;
764}
765
222f1806
LC		 766static int count_trail_chars(const char __user * user_buffer,
767 unsigned int maxlen)
1da177e4
LT		 768{
769 int i;
770
771 for (i = 0; i < maxlen; i++) {
222f1806
LC		 772 char c;
773 if (get_user(c, &user_buffer[i]))
774 return -EFAULT;
775 switch (c) {
1da177e4
LT		 776 case '\"':
777 case '\n':
778 case '\r':
779 case '\t':
780 case ' ':
781 case '=':
782 break;
783 default:
784 goto done;
3ff50b79 785 }
1da177e4
LT		 786 }
787done:
788 return i;
789}
790
bf0813bd
PG		 791static long num_arg(const char __user *user_buffer, unsigned long maxlen,
792 unsigned long *num)
1da177e4 793{
d6182223 794 int i;
1da177e4 795 *num = 0;
222f1806 796
d6182223 797 for (i = 0; i < maxlen; i++) {
222f1806
LC		 798 char c;
799 if (get_user(c, &user_buffer[i]))
800 return -EFAULT;
801 if ((c >= '0') && (c <= '9')) {
1da177e4 802 *num *= 10;
222f1806 803 *num += c - '0';
1da177e4
LT		 804 } else
805 break;
806 }
807 return i;
808}
809
222f1806 810static int strn_len(const char __user * user_buffer, unsigned int maxlen)
1da177e4 811{
d6182223 812 int i;
1da177e4 813
d6182223 814 for (i = 0; i < maxlen; i++) {
222f1806
LC		 815 char c;
816 if (get_user(c, &user_buffer[i]))
817 return -EFAULT;
818 switch (c) {
1da177e4
LT		 819 case '\"':
820 case '\n':
821 case '\r':
822 case '\t':
823 case ' ':
824 goto done_str;
1da177e4
LT		 825 default:
826 break;
3ff50b79 827 }
1da177e4
LT		 828 }
829done_str:
1da177e4
LT		 830 return i;
831}
832
52a62f86
NR		 833/* Parses imix entries from user buffer.
834 * The user buffer should consist of imix entries separated by spaces
835 * where each entry consists of size and weight delimited by commas.
836 * "size1,weight_1 size2,weight_2 ... size_n,weight_n" for example.
837 */
838static ssize_t get_imix_entries(const char __user *buffer,
839 struct pktgen_dev *pkt_dev)
840{
841 const int max_digits = 10;
842 int i = 0;
843 long len;
844 char c;
845
846 pkt_dev->n_imix_entries = 0;
847
848 do {
849 unsigned long weight;
850 unsigned long size;
851
852 len = num_arg(&buffer[i], max_digits, &size);
853 if (len < 0)
854 return len;
855 i += len;
856 if (get_user(c, &buffer[i]))
857 return -EFAULT;
858 /* Check for comma between size_i and weight_i */
859 if (c != ',')
860 return -EINVAL;
861 i++;
862
863 if (size < 14 + 20 + 8)
864 size = 14 + 20 + 8;
865
866 len = num_arg(&buffer[i], max_digits, &weight);
867 if (len < 0)
868 return len;
869 if (weight <= 0)
870 return -EINVAL;
871
872 pkt_dev->imix_entries[pkt_dev->n_imix_entries].size = size;
873 pkt_dev->imix_entries[pkt_dev->n_imix_entries].weight = weight;
874
875 i += len;
876 if (get_user(c, &buffer[i]))
877 return -EFAULT;
878
879 i++;
880 pkt_dev->n_imix_entries++;
881
882 if (pkt_dev->n_imix_entries > MAX_IMIX_ENTRIES)
883 return -E2BIG;
884 } while (c == ' ');
885
886 return i;
887}
888
ca6549af
SW		 889static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
890{
95c96174 891 unsigned int n = 0;
ca6549af
SW		 892 char c;
893 ssize_t i = 0;
894 int len;
895
896 pkt_dev->nr_labels = 0;
897 do {
898 __u32 tmp;
1ca7768c 899 len = hex32_arg(&buffer[i], 8, &tmp);
ca6549af
SW		 900 if (len <= 0)
901 return len;
902 pkt_dev->labels[n] = htonl(tmp);
903 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
904 pkt_dev->flags |= F_MPLS_RND;
905 i += len;
906 if (get_user(c, &buffer[i]))
907 return -EFAULT;
908 i++;
909 n++;
910 if (n >= MAX_MPLS_LABELS)
911 return -E2BIG;
e71a4783 912 } while (c == ',');
ca6549af
SW		 913
914 pkt_dev->nr_labels = n;
915 return i;
916}
917
52e12d5d
DS		 918static __u32 pktgen_read_flag(const char *f, bool *disable)
919{
920 __u32 i;
921
922 if (f[0] == '!') {
923 *disable = true;
924 f++;
925 }
926
927 for (i = 0; i < NR_PKT_FLAGS; i++) {
928 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
929 continue;
930
931 /* allow only disabling ipv6 flag */
932 if (!*disable && i == IPV6_SHIFT)
933 continue;
934
935 if (strcmp(f, pkt_flag_names[i]) == 0)
936 return 1 << i;
937 }
938
939 if (strcmp(f, "FLOW_RND") == 0) {
940 *disable = !*disable;
941 return F_FLOW_SEQ;
942 }
943
944 return 0;
945}
946
222f1806
LC		 947static ssize_t pktgen_if_write(struct file *file,
948 const char __user * user_buffer, size_t count,
949 loff_t * offset)
1da177e4 950{
8a994a71 951 struct seq_file *seq = file->private_data;
222f1806 952 struct pktgen_dev *pkt_dev = seq->private;
d6182223 953 int i, max, len;
1da177e4
LT		 954 char name[16], valstr[32];
955 unsigned long value = 0;
222f1806
LC		 956 char *pg_result = NULL;
957 int tmp = 0;
1da177e4 958 char buf[128];
222f1806
LC		 959
960 pg_result = &(pkt_dev->result[0]);
961
1da177e4 962 if (count < 1) {
294a0b7f 963 pr_warn("wrong command format\n");
1da177e4
LT		 964 return -EINVAL;
965 }
222f1806 966
d6182223
PG		 967 max = count;
968 tmp = count_trail_chars(user_buffer, max);
222f1806 969 if (tmp < 0) {
294a0b7f 970 pr_warn("illegal format\n");
222f1806 971 return tmp;
1da177e4 972 }
d6182223 973 i = tmp;
222f1806 974
1da177e4
LT		 975 /* Read variable name */
976
977 len = strn_len(&user_buffer[i], sizeof(name) - 1);
63adc6fb 978 if (len < 0)
222f1806 979 return len;
63adc6fb 980
1da177e4 981 memset(name, 0, sizeof(name));
222f1806 982 if (copy_from_user(name, &user_buffer[i], len))
1da177e4
LT		 983 return -EFAULT;
984 i += len;
222f1806
LC		 985
986 max = count - i;
1da177e4 987 len = count_trail_chars(&user_buffer[i], max);
222f1806
LC		 988 if (len < 0)
989 return len;
990
1da177e4
LT		 991 i += len;
992
993 if (debug) {
a870a02c
AB		 994 size_t copy = min_t(size_t, count + 1, 1024);
995 char *tp = strndup_user(user_buffer, copy);
996
997 if (IS_ERR(tp))
998 return PTR_ERR(tp);
999
1000 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
29d1df72 1001 kfree(tp);
222f1806 1002 }
1da177e4
LT		 1003
1004 if (!strcmp(name, "min_pkt_size")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1006 if (len < 0)
222f1806 1007 return len;
63adc6fb 1008
1da177e4 1009 i += len;
222f1806
LC		 1010 if (value < 14 + 20 + 8)
1011 value = 14 + 20 + 8;
1012 if (value != pkt_dev->min_pkt_size) {
1013 pkt_dev->min_pkt_size = value;
1014 pkt_dev->cur_pkt_size = value;
1015 }
32be425b 1016 sprintf(pg_result, "OK: min_pkt_size=%d",
222f1806 1017 pkt_dev->min_pkt_size);
1da177e4
LT		 1018 return count;
1019 }
1020
222f1806 1021 if (!strcmp(name, "max_pkt_size")) {
1da177e4 1022 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1023 if (len < 0)
222f1806 1024 return len;
63adc6fb 1025
1da177e4 1026 i += len;
222f1806
LC		 1027 if (value < 14 + 20 + 8)
1028 value = 14 + 20 + 8;
1029 if (value != pkt_dev->max_pkt_size) {
1030 pkt_dev->max_pkt_size = value;
1031 pkt_dev->cur_pkt_size = value;
1032 }
32be425b 1033 sprintf(pg_result, "OK: max_pkt_size=%d",
222f1806 1034 pkt_dev->max_pkt_size);
1da177e4
LT		 1035 return count;
1036 }
1037
222f1806 1038 /* Shortcut for min = max */
1da177e4
LT		 1039
1040 if (!strcmp(name, "pkt_size")) {
1041 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1042 if (len < 0)
222f1806 1043 return len;
63adc6fb 1044
1da177e4 1045 i += len;
222f1806
LC		 1046 if (value < 14 + 20 + 8)
1047 value = 14 + 20 + 8;
1048 if (value != pkt_dev->min_pkt_size) {
1049 pkt_dev->min_pkt_size = value;
1050 pkt_dev->max_pkt_size = value;
1051 pkt_dev->cur_pkt_size = value;
1052 }
32be425b 1053 sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size);
1da177e4
LT		 1054 return count;
1055 }
1056
52a62f86
NR		 1057 if (!strcmp(name, "imix_weights")) {
1058 if (pkt_dev->clone_skb > 0)
1059 return -EINVAL;
1060
1061 len = get_imix_entries(&user_buffer[i], pkt_dev);
1062 if (len < 0)
1063 return len;
1064
90149031
NR		 1065 fill_imix_distribution(pkt_dev);
1066
52a62f86
NR		 1067 i += len;
1068 return count;
1069 }
1070
222f1806 1071 if (!strcmp(name, "debug")) {
1da177e4 1072 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1073 if (len < 0)
222f1806 1074 return len;
63adc6fb 1075
1da177e4 1076 i += len;
222f1806 1077 debug = value;
1da177e4
LT		 1078 sprintf(pg_result, "OK: debug=%u", debug);
1079 return count;
1080 }
1081
222f1806 1082 if (!strcmp(name, "frags")) {
1da177e4 1083 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1084 if (len < 0)
222f1806 1085 return len;
63adc6fb 1086
1da177e4
LT		 1087 i += len;
1088 pkt_dev->nfrags = value;
32be425b 1089 sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags);
1da177e4
LT		 1090 return count;
1091 }
1092 if (!strcmp(name, "delay")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1094 if (len < 0)
222f1806 1095 return len;
63adc6fb 1096
1da177e4 1097 i += len;
fd29cf72
SH		 1098 if (value == 0x7FFFFFFF)
1099 pkt_dev->delay = ULLONG_MAX;
1100 else
9240d715 1101 pkt_dev->delay = (u64)value;
fd29cf72
SH		 1102
1103 sprintf(pg_result, "OK: delay=%llu",
1104 (unsigned long long) pkt_dev->delay);
1da177e4
LT		 1105 return count;
1106 }
43d28b65
DT		 1107 if (!strcmp(name, "rate")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1109 if (len < 0)
1110 return len;
1111
1112 i += len;
1113 if (!value)
1114 return len;
1115 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1116 if (debug)
f9467eae 1117 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
43d28b65
DT		 1118
1119 sprintf(pg_result, "OK: rate=%lu", value);
1120 return count;
1121 }
1122 if (!strcmp(name, "ratep")) {
1123 len = num_arg(&user_buffer[i], 10, &value);
1124 if (len < 0)
1125 return len;
1126
1127 i += len;
1128 if (!value)
1129 return len;
1130 pkt_dev->delay = NSEC_PER_SEC/value;
1131 if (debug)
f9467eae 1132 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
43d28b65
DT		 1133
1134 sprintf(pg_result, "OK: rate=%lu", value);
1135 return count;
1136 }
222f1806 1137 if (!strcmp(name, "udp_src_min")) {
1da177e4 1138 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1139 if (len < 0)
222f1806 1140 return len;
63adc6fb 1141
1da177e4 1142 i += len;
222f1806
LC		 1143 if (value != pkt_dev->udp_src_min) {
1144 pkt_dev->udp_src_min = value;
1145 pkt_dev->cur_udp_src = value;
1146 }
1da177e4
LT		 1147 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1148 return count;
1149 }
222f1806 1150 if (!strcmp(name, "udp_dst_min")) {
1da177e4 1151 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1152 if (len < 0)
222f1806 1153 return len;
63adc6fb 1154
1da177e4 1155 i += len;
222f1806
LC		 1156 if (value != pkt_dev->udp_dst_min) {
1157 pkt_dev->udp_dst_min = value;
1158 pkt_dev->cur_udp_dst = value;
1159 }
1da177e4
LT		 1160 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1161 return count;
1162 }
222f1806 1163 if (!strcmp(name, "udp_src_max")) {
1da177e4 1164 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1165 if (len < 0)
222f1806 1166 return len;
63adc6fb 1167
1da177e4 1168 i += len;
222f1806
LC		 1169 if (value != pkt_dev->udp_src_max) {
1170 pkt_dev->udp_src_max = value;
1171 pkt_dev->cur_udp_src = value;
1172 }
1da177e4
LT		 1173 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1174 return count;
1175 }
222f1806 1176 if (!strcmp(name, "udp_dst_max")) {
1da177e4 1177 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1178 if (len < 0)
222f1806 1179 return len;
63adc6fb 1180
1da177e4 1181 i += len;
222f1806
LC		 1182 if (value != pkt_dev->udp_dst_max) {
1183 pkt_dev->udp_dst_max = value;
1184 pkt_dev->cur_udp_dst = value;
1185 }
1da177e4
LT		 1186 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1187 return count;
1188 }
1189 if (!strcmp(name, "clone_skb")) {
1190 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1191 if (len < 0)
222f1806 1192 return len;
52a62f86
NR		 1193 /* clone_skb is not supported for netif_receive xmit_mode and
1194 * IMIX mode.
1195 */
d8873315 1196 if ((value > 0) &&
62f64aed
AS		 1197 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1198 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
d8873315 1199 return -ENOTSUPP;
52a62f86
NR		 1200 if (value > 0 && pkt_dev->n_imix_entries > 0)
1201 return -EINVAL;
1202
1da177e4 1203 i += len;
222f1806
LC		 1204 pkt_dev->clone_skb = value;
1205
1da177e4
LT		 1206 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1207 return count;
1208 }
1209 if (!strcmp(name, "count")) {
1210 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1211 if (len < 0)
222f1806 1212 return len;
63adc6fb 1213
1da177e4
LT		 1214 i += len;
1215 pkt_dev->count = value;
1216 sprintf(pg_result, "OK: count=%llu",
222f1806 1217 (unsigned long long)pkt_dev->count);
1da177e4
LT		 1218 return count;
1219 }
1220 if (!strcmp(name, "src_mac_count")) {
1221 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1222 if (len < 0)
222f1806 1223 return len;
63adc6fb 1224
1da177e4
LT		 1225 i += len;
1226 if (pkt_dev->src_mac_count != value) {
222f1806
LC		 1227 pkt_dev->src_mac_count = value;
1228 pkt_dev->cur_src_mac_offset = 0;
1229 }
1230 sprintf(pg_result, "OK: src_mac_count=%d",
1231 pkt_dev->src_mac_count);
1da177e4
LT		 1232 return count;
1233 }
1234 if (!strcmp(name, "dst_mac_count")) {
1235 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1236 if (len < 0)
222f1806 1237 return len;
63adc6fb 1238
1da177e4
LT		 1239 i += len;
1240 if (pkt_dev->dst_mac_count != value) {
222f1806
LC		 1241 pkt_dev->dst_mac_count = value;
1242 pkt_dev->cur_dst_mac_offset = 0;
1243 }
1244 sprintf(pg_result, "OK: dst_mac_count=%d",
1245 pkt_dev->dst_mac_count);
1da177e4
LT		 1246 return count;
1247 }
38b2cf29
AS		 1248 if (!strcmp(name, "burst")) {
1249 len = num_arg(&user_buffer[i], 10, &value);
1250 if (len < 0)
1251 return len;
1252
1253 i += len;
0967f244
JF		 1254 if ((value > 1) &&
1255 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1256 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1257 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
52d6c8c6 1258 return -ENOTSUPP;
38b2cf29 1259 pkt_dev->burst = value < 1 ? 1 : value;
32be425b 1260 sprintf(pg_result, "OK: burst=%u", pkt_dev->burst);
38b2cf29
AS		 1261 return count;
1262 }
e99b99b4
RO		 1263 if (!strcmp(name, "node")) {
1264 len = num_arg(&user_buffer[i], 10, &value);
1265 if (len < 0)
1266 return len;
1267
1268 i += len;
1269
1270 if (node_possible(value)) {
1271 pkt_dev->node = value;
1272 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
26ad7879
ED		 1273 if (pkt_dev->page) {
1274 put_page(pkt_dev->page);
1275 pkt_dev->page = NULL;
1276 }
e99b99b4
RO		 1277 }
1278 else
1279 sprintf(pg_result, "ERROR: node not possible");
1280 return count;
1281 }
62f64aed
AS		 1282 if (!strcmp(name, "xmit_mode")) {
1283 char f[32];
1284
1285 memset(f, 0, 32);
1286 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1287 if (len < 0)
1288 return len;
1289
1290 if (copy_from_user(f, &user_buffer[i], len))
1291 return -EFAULT;
1292 i += len;
1293
1294 if (strcmp(f, "start_xmit") == 0) {
1295 pkt_dev->xmit_mode = M_START_XMIT;
1296 } else if (strcmp(f, "netif_receive") == 0) {
1297 /* clone_skb set earlier, not supported in this mode */
1298 if (pkt_dev->clone_skb > 0)
1299 return -ENOTSUPP;
1300
1301 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
9eea9222
AS		 1302
1303 /* make sure new packet is allocated every time
1304 * pktgen_xmit() is called
1305 */
1306 pkt_dev->last_ok = 1;
0967f244
JF		 1307 } else if (strcmp(f, "queue_xmit") == 0) {
1308 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1309 pkt_dev->last_ok = 1;
62f64aed
AS		 1310 } else {
1311 sprintf(pg_result,
1312 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1313 f, "start_xmit, netif_receive\n");
1314 return count;
1315 }
1316 sprintf(pg_result, "OK: xmit_mode=%s", f);
1317 return count;
1318 }
1da177e4 1319 if (!strcmp(name, "flag")) {
52e12d5d 1320 __u32 flag;
222f1806 1321 char f[32];
52e12d5d
DS		 1322 bool disable = false;
1323
222f1806 1324 memset(f, 0, 32);
1da177e4 1325 len = strn_len(&user_buffer[i], sizeof(f) - 1);
63adc6fb 1326 if (len < 0)
222f1806 1327 return len;
63adc6fb 1328
1da177e4
LT		 1329 if (copy_from_user(f, &user_buffer[i], len))
1330 return -EFAULT;
1331 i += len;
222f1806 1332
52e12d5d 1333 flag = pktgen_read_flag(f, &disable);
222f1806 1334
52e12d5d
DS		 1335 if (flag) {
1336 if (disable)
1337 pkt_dev->flags &= ~flag;
1338 else
1339 pkt_dev->flags |= flag;
1340 } else {
222f1806
LC		 1341 sprintf(pg_result,
1342 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1343 f,
1ca7768c 1344 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
72f8e06f
MK		 1345 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1346 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1347 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
afb84b62 1348 "NO_TIMESTAMP, "
72f8e06f
MK		 1349#ifdef CONFIG_XFRM
1350 "IPSEC, "
1351#endif
1352 "NODE_ALLOC\n");
222f1806
LC		 1353 return count;
1354 }
1da177e4
LT		 1355 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1356 return count;
1357 }
1358 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1359 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
63adc6fb 1360 if (len < 0)
222f1806 1361 return len;
1da177e4 1362
222f1806 1363 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1364 return -EFAULT;
222f1806
LC		 1365 buf[len] = 0;
1366 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1367 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
f15f084f 1368 strcpy(pkt_dev->dst_min, buf);
222f1806
LC		 1369 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1370 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1371 }
1372 if (debug)
f342cda7 1373 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
222f1806 1374 i += len;
1da177e4
LT		 1375 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1376 return count;
1377 }
1378 if (!strcmp(name, "dst_max")) {
1379 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
63adc6fb 1380 if (len < 0)
222f1806 1381 return len;
63adc6fb 1382
222f1806 1383 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1384 return -EFAULT;
222f1806
LC		 1385 buf[len] = 0;
1386 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1387 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
f15f084f 1388 strcpy(pkt_dev->dst_max, buf);
222f1806
LC		 1389 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1390 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1391 }
1392 if (debug)
f342cda7 1393 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1da177e4
LT		 1394 i += len;
1395 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1396 return count;
1397 }
1398 if (!strcmp(name, "dst6")) {
1399 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1400 if (len < 0)
1401 return len;
1da177e4
LT		 1402
1403 pkt_dev->flags |= F_IPV6;
1404
222f1806 1405 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1406 return -EFAULT;
222f1806 1407 buf[len] = 0;
1da177e4 1408
c468fb13 1409 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
47a0200d 1410 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1da177e4 1411
4e3fd7a0 1412 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1da177e4 1413
222f1806 1414 if (debug)
f342cda7 1415 pr_debug("dst6 set to: %s\n", buf);
1da177e4 1416
222f1806 1417 i += len;
1da177e4
LT		 1418 sprintf(pg_result, "OK: dst6=%s", buf);
1419 return count;
1420 }
1421 if (!strcmp(name, "dst6_min")) {
1422 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1423 if (len < 0)
1424 return len;
1da177e4
LT		 1425
1426 pkt_dev->flags |= F_IPV6;
1427
222f1806 1428 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1429 return -EFAULT;
222f1806 1430 buf[len] = 0;
1da177e4 1431
c468fb13 1432 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
47a0200d 1433 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1da177e4 1434
4e3fd7a0 1435 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
222f1806 1436 if (debug)
f342cda7 1437 pr_debug("dst6_min set to: %s\n", buf);
1da177e4 1438
222f1806 1439 i += len;
1da177e4
LT		 1440 sprintf(pg_result, "OK: dst6_min=%s", buf);
1441 return count;
1442 }
1443 if (!strcmp(name, "dst6_max")) {
1444 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1445 if (len < 0)
1446 return len;
1da177e4
LT		 1447
1448 pkt_dev->flags |= F_IPV6;
1449
222f1806 1450 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1451 return -EFAULT;
222f1806 1452 buf[len] = 0;
1da177e4 1453
c468fb13 1454 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
47a0200d 1455 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1da177e4 1456
222f1806 1457 if (debug)
f342cda7 1458 pr_debug("dst6_max set to: %s\n", buf);
1da177e4 1459
222f1806 1460 i += len;
1da177e4
LT		 1461 sprintf(pg_result, "OK: dst6_max=%s", buf);
1462 return count;
1463 }
1464 if (!strcmp(name, "src6")) {
1465 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1466 if (len < 0)
1467 return len;
1da177e4
LT		 1468
1469 pkt_dev->flags |= F_IPV6;
1470
222f1806 1471 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1472 return -EFAULT;
222f1806 1473 buf[len] = 0;
1da177e4 1474
c468fb13 1475 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
47a0200d 1476 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1da177e4 1477
4e3fd7a0 1478 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1da177e4 1479
222f1806 1480 if (debug)
f342cda7 1481 pr_debug("src6 set to: %s\n", buf);
222f1806
LC		 1482
1483 i += len;
1da177e4
LT		 1484 sprintf(pg_result, "OK: src6=%s", buf);
1485 return count;
1486 }
1487 if (!strcmp(name, "src_min")) {
1488 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
63adc6fb 1489 if (len < 0)
222f1806 1490 return len;
63adc6fb 1491
222f1806 1492 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1493 return -EFAULT;
222f1806
LC		 1494 buf[len] = 0;
1495 if (strcmp(buf, pkt_dev->src_min) != 0) {
1496 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
f15f084f 1497 strcpy(pkt_dev->src_min, buf);
222f1806
LC		 1498 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1499 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1500 }
1501 if (debug)
f342cda7 1502 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1da177e4
LT		 1503 i += len;
1504 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1505 return count;
1506 }
1507 if (!strcmp(name, "src_max")) {
1508 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
63adc6fb 1509 if (len < 0)
222f1806 1510 return len;
63adc6fb 1511
222f1806 1512 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1513 return -EFAULT;
222f1806
LC		 1514 buf[len] = 0;
1515 if (strcmp(buf, pkt_dev->src_max) != 0) {
1516 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
f15f084f 1517 strcpy(pkt_dev->src_max, buf);
222f1806
LC		 1518 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1519 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1520 }
1521 if (debug)
f342cda7 1522 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1da177e4
LT		 1523 i += len;
1524 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1525 return count;
1526 }
1527 if (!strcmp(name, "dst_mac")) {
1da177e4 1528 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
63adc6fb 1529 if (len < 0)
222f1806 1530 return len;
63adc6fb 1531
1da177e4 1532 memset(valstr, 0, sizeof(valstr));
222f1806 1533 if (copy_from_user(valstr, &user_buffer[i], len))
1da177e4 1534 return -EFAULT;
1da177e4 1535
4940fc88
AD		 1536 if (!mac_pton(valstr, pkt_dev->dst_mac))
1537 return -EINVAL;
1da177e4 1538 /* Set up Dest MAC */
9ea08b12 1539 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
222f1806 1540
4940fc88 1541 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1da177e4
LT		 1542 return count;
1543 }
1544 if (!strcmp(name, "src_mac")) {
1da177e4 1545 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
63adc6fb 1546 if (len < 0)
222f1806 1547 return len;
63adc6fb 1548
1da177e4 1549 memset(valstr, 0, sizeof(valstr));
222f1806 1550 if (copy_from_user(valstr, &user_buffer[i], len))
1da177e4 1551 return -EFAULT;
1da177e4 1552
4940fc88
AD		 1553 if (!mac_pton(valstr, pkt_dev->src_mac))
1554 return -EINVAL;
ce5d0b47 1555 /* Set up Src MAC */
9ea08b12 1556 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
ce5d0b47 1557
4940fc88 1558 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1da177e4
LT		 1559 return count;
1560 }
1561
222f1806
LC		 1562 if (!strcmp(name, "clear_counters")) {
1563 pktgen_clear_counters(pkt_dev);
1564 sprintf(pg_result, "OK: Clearing counters.\n");
1565 return count;
1566 }
1da177e4
LT		 1567
1568 if (!strcmp(name, "flows")) {
1569 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1570 if (len < 0)
222f1806 1571 return len;
63adc6fb 1572
1da177e4
LT		 1573 i += len;
1574 if (value > MAX_CFLOWS)
1575 value = MAX_CFLOWS;
1576
1577 pkt_dev->cflows = value;
1578 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1579 return count;
1580 }
6bae9190 1581#ifdef CONFIG_XFRM
de4aee7d
FD		 1582 if (!strcmp(name, "spi")) {
1583 len = num_arg(&user_buffer[i], 10, &value);
1584 if (len < 0)
1585 return len;
1586
1587 i += len;
1588 pkt_dev->spi = value;
1589 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1590 return count;
1591 }
6bae9190 1592#endif
1da177e4
LT		 1593 if (!strcmp(name, "flowlen")) {
1594 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1595 if (len < 0)
222f1806 1596 return len;
63adc6fb 1597
1da177e4
LT		 1598 i += len;
1599 pkt_dev->lflow = value;
1600 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1601 return count;
1602 }
222f1806 1603
45b270f8
RO		 1604 if (!strcmp(name, "queue_map_min")) {
1605 len = num_arg(&user_buffer[i], 5, &value);
63adc6fb 1606 if (len < 0)
45b270f8 1607 return len;
63adc6fb 1608
45b270f8
RO		 1609 i += len;
1610 pkt_dev->queue_map_min = value;
1611 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1612 return count;
1613 }
1614
1615 if (!strcmp(name, "queue_map_max")) {
1616 len = num_arg(&user_buffer[i], 5, &value);
63adc6fb 1617 if (len < 0)
45b270f8 1618 return len;
63adc6fb 1619
45b270f8
RO		 1620 i += len;
1621 pkt_dev->queue_map_max = value;
1622 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1623 return count;
1624 }
1625
ca6549af 1626 if (!strcmp(name, "mpls")) {
95c96174 1627 unsigned int n, cnt;
cfcabdcc 1628
ca6549af 1629 len = get_labels(&user_buffer[i], pkt_dev);
cfcabdcc
SH		 1630 if (len < 0)
1631 return len;
ca6549af 1632 i += len;
cfcabdcc 1633 cnt = sprintf(pg_result, "OK: mpls=");
e71a4783 1634 for (n = 0; n < pkt_dev->nr_labels; n++)
cfcabdcc
SH		 1635 cnt += sprintf(pg_result + cnt,
1636 "%08x%s", ntohl(pkt_dev->labels[n]),
1637 n == pkt_dev->nr_labels-1 ? "" : ",");
34954ddc
FF		 1638
1639 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1640 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1641 pkt_dev->svlan_id = 0xffff;
1642
1643 if (debug)
f342cda7 1644 pr_debug("VLAN/SVLAN auto turned off\n");
34954ddc
FF		 1645 }
1646 return count;
1647 }
1648
1649 if (!strcmp(name, "vlan_id")) {
1650 len = num_arg(&user_buffer[i], 4, &value);
63adc6fb 1651 if (len < 0)
34954ddc 1652 return len;
63adc6fb 1653
34954ddc
FF		 1654 i += len;
1655 if (value <= 4095) {
1656 pkt_dev->vlan_id = value; /* turn on VLAN */
1657
1658 if (debug)
f342cda7 1659 pr_debug("VLAN turned on\n");
34954ddc
FF		 1660
1661 if (debug && pkt_dev->nr_labels)
f342cda7 1662 pr_debug("MPLS auto turned off\n");
34954ddc
FF		 1663
1664 pkt_dev->nr_labels = 0; /* turn off MPLS */
1665 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1666 } else {
1667 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1668 pkt_dev->svlan_id = 0xffff;
1669
1670 if (debug)
f342cda7 1671 pr_debug("VLAN/SVLAN turned off\n");
34954ddc
FF		 1672 }
1673 return count;
1674 }
1675
1676 if (!strcmp(name, "vlan_p")) {
1677 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1678 if (len < 0)
34954ddc 1679 return len;
63adc6fb 1680
34954ddc
FF		 1681 i += len;
1682 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1683 pkt_dev->vlan_p = value;
1684 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1685 } else {
1686 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1687 }
1688 return count;
1689 }
1690
1691 if (!strcmp(name, "vlan_cfi")) {
1692 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1693 if (len < 0)
34954ddc 1694 return len;
63adc6fb 1695
34954ddc
FF		 1696 i += len;
1697 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1698 pkt_dev->vlan_cfi = value;
1699 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1700 } else {
1701 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1702 }
1703 return count;
1704 }
1705
1706 if (!strcmp(name, "svlan_id")) {
1707 len = num_arg(&user_buffer[i], 4, &value);
63adc6fb 1708 if (len < 0)
34954ddc 1709 return len;
63adc6fb 1710
34954ddc
FF		 1711 i += len;
1712 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1713 pkt_dev->svlan_id = value; /* turn on SVLAN */
1714
1715 if (debug)
f342cda7 1716 pr_debug("SVLAN turned on\n");
34954ddc
FF		 1717
1718 if (debug && pkt_dev->nr_labels)
f342cda7 1719 pr_debug("MPLS auto turned off\n");
34954ddc
FF		 1720
1721 pkt_dev->nr_labels = 0; /* turn off MPLS */
1722 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1723 } else {
1724 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1725 pkt_dev->svlan_id = 0xffff;
1726
1727 if (debug)
f342cda7 1728 pr_debug("VLAN/SVLAN turned off\n");
34954ddc
FF		 1729 }
1730 return count;
1731 }
1732
1733 if (!strcmp(name, "svlan_p")) {
1734 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1735 if (len < 0)
34954ddc 1736 return len;
63adc6fb 1737
34954ddc
FF		 1738 i += len;
1739 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1740 pkt_dev->svlan_p = value;
1741 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1742 } else {
1743 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1744 }
1745 return count;
1746 }
1747
1748 if (!strcmp(name, "svlan_cfi")) {
1749 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1750 if (len < 0)
34954ddc 1751 return len;
63adc6fb 1752
34954ddc
FF		 1753 i += len;
1754 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1755 pkt_dev->svlan_cfi = value;
1756 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1757 } else {
1758 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1759 }
ca6549af
SW		 1760 return count;
1761 }
1762
1ca7768c
FF		 1763 if (!strcmp(name, "tos")) {
1764 __u32 tmp_value = 0;
1765 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
63adc6fb 1766 if (len < 0)
1ca7768c 1767 return len;
63adc6fb 1768
1ca7768c
FF		 1769 i += len;
1770 if (len == 2) {
1771 pkt_dev->tos = tmp_value;
1772 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1773 } else {
1774 sprintf(pg_result, "ERROR: tos must be 00-ff");
1775 }
1776 return count;
1777 }
1778
1779 if (!strcmp(name, "traffic_class")) {
1780 __u32 tmp_value = 0;
1781 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
63adc6fb 1782 if (len < 0)
1ca7768c 1783 return len;
63adc6fb 1784
1ca7768c
FF		 1785 i += len;
1786 if (len == 2) {
1787 pkt_dev->traffic_class = tmp_value;
1788 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1789 } else {
1790 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1791 }
1792 return count;
1793 }
1794
9e50e3ac
JF		 1795 if (!strcmp(name, "skb_priority")) {
1796 len = num_arg(&user_buffer[i], 9, &value);
1797 if (len < 0)
1798 return len;
1799
1800 i += len;
1801 pkt_dev->skb_priority = value;
1802 sprintf(pg_result, "OK: skb_priority=%i",
1803 pkt_dev->skb_priority);
1804 return count;
1805 }
1806
1da177e4
LT		 1807 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1808 return -EINVAL;
1809}
1810
d50a6b56 1811static int pktgen_if_open(struct inode *inode, struct file *file)
1da177e4 1812{
d9dda78b 1813 return single_open(file, pktgen_if_show, PDE_DATA(inode));
d50a6b56 1814}
1da177e4 1815
97a32539
AD		 1816static const struct proc_ops pktgen_if_proc_ops = {
1817 .proc_open = pktgen_if_open,
1818 .proc_read = seq_read,
1819 .proc_lseek = seq_lseek,
1820 .proc_write = pktgen_if_write,
1821 .proc_release = single_release,
d50a6b56 1822};
1da177e4 1823
d50a6b56
SH		 1824static int pktgen_thread_show(struct seq_file *seq, void *v)
1825{
222f1806 1826 struct pktgen_thread *t = seq->private;
648fda74 1827 const struct pktgen_dev *pkt_dev;
d50a6b56
SH		 1828
1829 BUG_ON(!t);
1da177e4 1830
97dc48e2 1831 seq_puts(seq, "Running: ");
1da177e4 1832
8788370a
JDB		 1833 rcu_read_lock();
1834 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
222f1806 1835 if (pkt_dev->running)
593f63b0 1836 seq_printf(seq, "%s ", pkt_dev->odevname);
1da177e4 1837
97dc48e2 1838 seq_puts(seq, "\nStopped: ");
222f1806 1839
8788370a 1840 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
222f1806 1841 if (!pkt_dev->running)
593f63b0 1842 seq_printf(seq, "%s ", pkt_dev->odevname);
1da177e4
LT		 1843
1844 if (t->result[0])
d50a6b56 1845 seq_printf(seq, "\nResult: %s\n", t->result);
1da177e4 1846 else
97dc48e2 1847 seq_puts(seq, "\nResult: NA\n");
1da177e4 1848
8788370a 1849 rcu_read_unlock();
1da177e4 1850
d50a6b56 1851 return 0;
1da177e4
LT		 1852}
1853
d50a6b56 1854static ssize_t pktgen_thread_write(struct file *file,
222f1806
LC		 1855 const char __user * user_buffer,
1856 size_t count, loff_t * offset)
1da177e4 1857{
8a994a71 1858 struct seq_file *seq = file->private_data;
222f1806 1859 struct pktgen_thread *t = seq->private;
d6182223 1860 int i, max, len, ret;
1da177e4 1861 char name[40];
222f1806 1862 char *pg_result;
d50a6b56 1863
1da177e4 1864 if (count < 1) {
222f1806 1865 // sprintf(pg_result, "Wrong command format");
1da177e4
LT		 1866 return -EINVAL;
1867 }
d50a6b56 1868
d6182223
PG		 1869 max = count;
1870 len = count_trail_chars(user_buffer, max);
222f1806 1871 if (len < 0)
d50a6b56
SH		 1872 return len;
1873
d6182223 1874 i = len;
d50a6b56 1875
1da177e4
LT		 1876 /* Read variable name */
1877
1878 len = strn_len(&user_buffer[i], sizeof(name) - 1);
222f1806 1879 if (len < 0)
d50a6b56 1880 return len;
222f1806 1881
1da177e4
LT		 1882 memset(name, 0, sizeof(name));
1883 if (copy_from_user(name, &user_buffer[i], len))
1884 return -EFAULT;
1885 i += len;
d50a6b56 1886
222f1806 1887 max = count - i;
1da177e4 1888 len = count_trail_chars(&user_buffer[i], max);
222f1806 1889 if (len < 0)
d50a6b56
SH		 1890 return len;
1891
1da177e4
LT		 1892 i += len;
1893
d50a6b56 1894 if (debug)
f342cda7 1895 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1da177e4 1896
222f1806 1897 if (!t) {
f9467eae 1898 pr_err("ERROR: No thread\n");
1da177e4
LT		 1899 ret = -EINVAL;
1900 goto out;
1901 }
1902
1903 pg_result = &(t->result[0]);
1904
222f1806
LC		 1905 if (!strcmp(name, "add_device")) {
1906 char f[32];
1907 memset(f, 0, 32);
1da177e4 1908 len = strn_len(&user_buffer[i], sizeof(f) - 1);
222f1806
LC		 1909 if (len < 0) {
1910 ret = len;
1da177e4
LT		 1911 goto out;
1912 }
222f1806 1913 if (copy_from_user(f, &user_buffer[i], len))
1da177e4
LT		 1914 return -EFAULT;
1915 i += len;
6146e6a4 1916 mutex_lock(&pktgen_thread_lock);
604dfd6e 1917 ret = pktgen_add_device(t, f);
6146e6a4 1918 mutex_unlock(&pktgen_thread_lock);
604dfd6e
CW		 1919 if (!ret) {
1920 ret = count;
1921 sprintf(pg_result, "OK: add_device=%s", f);
1922 } else
1923 sprintf(pg_result, "ERROR: can not add device %s", f);
1da177e4
LT		 1924 goto out;
1925 }
1926
222f1806 1927 if (!strcmp(name, "rem_device_all")) {
6146e6a4 1928 mutex_lock(&pktgen_thread_lock);
95ed63f7 1929 t->control |= T_REMDEVALL;
6146e6a4 1930 mutex_unlock(&pktgen_thread_lock);
222f1806 1931 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1da177e4 1932 ret = count;
222f1806 1933 sprintf(pg_result, "OK: rem_device_all");
1da177e4
LT		 1934 goto out;
1935 }
1936
222f1806 1937 if (!strcmp(name, "max_before_softirq")) {
b163911f 1938 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
222f1806 1939 ret = count;
1da177e4
LT		 1940 goto out;
1941 }
1942
1943 ret = -EINVAL;
222f1806 1944out:
1da177e4
LT		 1945 return ret;
1946}
1947
d50a6b56 1948static int pktgen_thread_open(struct inode *inode, struct file *file)
1da177e4 1949{
d9dda78b 1950 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1da177e4
LT		 1951}
1952
97a32539
AD		 1953static const struct proc_ops pktgen_thread_proc_ops = {
1954 .proc_open = pktgen_thread_open,
1955 .proc_read = seq_read,
1956 .proc_lseek = seq_lseek,
1957 .proc_write = pktgen_thread_write,
1958 .proc_release = single_release,
d50a6b56 1959};
1da177e4
LT		 1960
1961/* Think find or remove for NN */
4e58a027
CW		 1962static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1963 const char *ifname, int remove)
1da177e4
LT		 1964{
1965 struct pktgen_thread *t;
1966 struct pktgen_dev *pkt_dev = NULL;
3e984840 1967 bool exact = (remove == FIND);
1da177e4 1968
4e58a027 1969 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3e984840 1970 pkt_dev = pktgen_find_dev(t, ifname, exact);
1da177e4 1971 if (pkt_dev) {
222f1806 1972 if (remove) {
222f1806
LC		 1973 pkt_dev->removal_mark = 1;
1974 t->control |= T_REMDEV;
222f1806 1975 }
1da177e4
LT		 1976 break;
1977 }
1da177e4 1978 }
222f1806 1979 return pkt_dev;
1da177e4
LT		 1980}
1981
95ed63f7
AK		 1982/*
1983 * mark a device for removal
1984 */
4e58a027 1985static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1da177e4
LT		 1986{
1987 struct pktgen_dev *pkt_dev = NULL;
95ed63f7
AK		 1988 const int max_tries = 10, msec_per_try = 125;
1989 int i = 0;
95ed63f7 1990
6146e6a4 1991 mutex_lock(&pktgen_thread_lock);
f9467eae 1992 pr_debug("%s: marking %s for removal\n", __func__, ifname);
95ed63f7 1993
222f1806 1994 while (1) {
95ed63f7 1995
4e58a027 1996 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
222f1806
LC		 1997 if (pkt_dev == NULL)
1998 break; /* success */
95ed63f7 1999
6146e6a4 2000 mutex_unlock(&pktgen_thread_lock);
f9467eae
JP		 2001 pr_debug("%s: waiting for %s to disappear....\n",
2002 __func__, ifname);
95ed63f7 2003 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
6146e6a4 2004 mutex_lock(&pktgen_thread_lock);
95ed63f7
AK		 2005
2006 if (++i >= max_tries) {
f9467eae
JP		 2007 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
2008 __func__, msec_per_try * i, ifname);
95ed63f7
AK		 2009 break;
2010 }
2011
2012 }
2013
6146e6a4 2014 mutex_unlock(&pktgen_thread_lock);
39df232f 2015}
95ed63f7 2016
4e58a027 2017static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
39df232f
SH		 2018{
2019 struct pktgen_thread *t;
2020
9a0b1e8b
ED		 2021 mutex_lock(&pktgen_thread_lock);
2022
4e58a027 2023 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
39df232f
SH		 2024 struct pktgen_dev *pkt_dev;
2025
9a0b1e8b
ED		 2026 if_lock(t);
2027 list_for_each_entry(pkt_dev, &t->if_list, list) {
39df232f
SH		 2028 if (pkt_dev->odev != dev)
2029 continue;
2030
a8ca16ea 2031 proc_remove(pkt_dev->entry);
39df232f 2032
2975315b 2033 pkt_dev->entry = proc_create_data(dev->name, 0600,
4e58a027 2034 pn->proc_dir,
97a32539 2035 &pktgen_if_proc_ops,
2975315b 2036 pkt_dev);
39df232f 2037 if (!pkt_dev->entry)
f9467eae
JP		 2038 pr_err("can't move proc entry for '%s'\n",
2039 dev->name);
39df232f
SH		 2040 break;
2041 }
9a0b1e8b 2042 if_unlock(t);
39df232f 2043 }
9a0b1e8b 2044 mutex_unlock(&pktgen_thread_lock);
1da177e4
LT		 2045}
2046
222f1806
LC		 2047static int pktgen_device_event(struct notifier_block *unused,
2048 unsigned long event, void *ptr)
1da177e4 2049{
351638e7 2050 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4e58a027 2051 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1da177e4 2052
4e58a027 2053 if (pn->pktgen_exiting)
e9dc8653
EB		 2054 return NOTIFY_DONE;
2055
1da177e4
LT		 2056 /* It is OK that we do not hold the group lock right now,
2057 * as we run under the RTNL lock.
2058 */
2059
2060 switch (event) {
39df232f 2061 case NETDEV_CHANGENAME:
4e58a027 2062 pktgen_change_name(pn, dev);
1da177e4 2063 break;
222f1806 2064
1da177e4 2065 case NETDEV_UNREGISTER:
4e58a027 2066 pktgen_mark_device(pn, dev->name);
1da177e4 2067 break;
3ff50b79 2068 }
1da177e4
LT		 2069
2070 return NOTIFY_DONE;
2071}
2072
4e58a027
CW		 2073static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2074 struct pktgen_dev *pkt_dev,
63adc6fb 2075 const char *ifname)
e6fce5b9
RO		 2076{
2077 char b[IFNAMSIZ+5];
d6182223 2078 int i;
e6fce5b9 2079
63adc6fb
SH		 2080 for (i = 0; ifname[i] != '@'; i++) {
2081 if (i == IFNAMSIZ)
e6fce5b9
RO		 2082 break;
2083
2084 b[i] = ifname[i];
2085 }
2086 b[i] = 0;
2087
4e58a027 2088 return dev_get_by_name(pn->net, b);
e6fce5b9
RO		 2089}
2090
2091
1da177e4
LT		 2092/* Associate pktgen_dev with a device. */
2093
4e58a027
CW		 2094static int pktgen_setup_dev(const struct pktgen_net *pn,
2095 struct pktgen_dev *pkt_dev, const char *ifname)
222f1806 2096{
1da177e4 2097 struct net_device *odev;
39df232f 2098 int err;
1da177e4
LT		 2099
2100 /* Clean old setups */
1da177e4
LT		 2101 if (pkt_dev->odev) {
2102 dev_put(pkt_dev->odev);
222f1806
LC		 2103 pkt_dev->odev = NULL;
2104 }
1da177e4 2105
4e58a027 2106 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
1da177e4 2107 if (!odev) {
f9467eae 2108 pr_err("no such netdevice: \"%s\"\n", ifname);
39df232f 2109 return -ENODEV;
1da177e4 2110 }
39df232f 2111
1e09e581
LW		 2112 if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) {
2113 pr_err("not an ethernet or loopback device: \"%s\"\n", ifname);
39df232f
SH		 2114 err = -EINVAL;
2115 } else if (!netif_running(odev)) {
f9467eae 2116 pr_err("device is down: \"%s\"\n", ifname);
39df232f
SH		 2117 err = -ENETDOWN;
2118 } else {
2119 pkt_dev->odev = odev;
2120 return 0;
1da177e4 2121 }
1da177e4 2122
1da177e4 2123 dev_put(odev);
39df232f 2124 return err;
1da177e4
LT		 2125}
2126
2127/* Read pkt_dev from the interface and set up internal pktgen_dev
2128 * structure to have the right information to create/send packets
2129 */
2130static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2131{
64c00d81
AG		 2132 int ntxq;
2133
222f1806 2134 if (!pkt_dev->odev) {
f9467eae 2135 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
222f1806
LC		 2136 sprintf(pkt_dev->result,
2137 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2138 return;
2139 }
2140
64c00d81
AG		 2141 /* make sure that we don't pick a non-existing transmit queue */
2142 ntxq = pkt_dev->odev->real_num_tx_queues;
bfdbc0ac 2143
64c00d81 2144 if (ntxq <= pkt_dev->queue_map_min) {
294a0b7f
JP		 2145 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2146 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2147 pkt_dev->odevname);
26e29eed 2148 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
64c00d81 2149 }
88271660 2150 if (pkt_dev->queue_map_max >= ntxq) {
294a0b7f
JP		 2151 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2152 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2153 pkt_dev->odevname);
26e29eed 2154 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
64c00d81
AG		 2155 }
2156
222f1806 2157 /* Default to the interface's mac if not explicitly set. */
1da177e4 2158
f404e9a6 2159 if (is_zero_ether_addr(pkt_dev->src_mac))
9ea08b12 2160 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
1da177e4 2161
222f1806 2162 /* Set up Dest MAC */
9ea08b12 2163 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
1da177e4 2164
222f1806 2165 if (pkt_dev->flags & F_IPV6) {
4c139b8c
AW		 2166 int i, set = 0, err = 1;
2167 struct inet6_dev *idev;
2168
68bf9f0b
AW		 2169 if (pkt_dev->min_pkt_size == 0) {
2170 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2171 + sizeof(struct udphdr)
2172 + sizeof(struct pktgen_hdr)
2173 + pkt_dev->pkt_overhead;
2174 }
2175
df7e8e2e 2176 for (i = 0; i < sizeof(struct in6_addr); i++)
222f1806 2177 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1da177e4
LT		 2178 set = 1;
2179 break;
2180 }
2181
222f1806
LC		 2182 if (!set) {
2183
1da177e4
LT		 2184 /*
2185 * Use linklevel address if unconfigured.
2186 *
2187 * use ipv6_get_lladdr if/when it's get exported
2188 */
2189
8814c4b5 2190 rcu_read_lock();
63adc6fb
SH		 2191 idev = __in6_dev_get(pkt_dev->odev);
2192 if (idev) {
1da177e4
LT		 2193 struct inet6_ifaddr *ifp;
2194
2195 read_lock_bh(&idev->lock);
4c139b8c
AW		 2196 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2197 if ((ifp->scope & IFA_LINK) &&
f64f9e71 2198 !(ifp->flags & IFA_F_TENTATIVE)) {
4e3fd7a0 2199 pkt_dev->cur_in6_saddr = ifp->addr;
1da177e4
LT		 2200 err = 0;
2201 break;
2202 }
2203 }
2204 read_unlock_bh(&idev->lock);
2205 }
8814c4b5 2206 rcu_read_unlock();
222f1806 2207 if (err)
f9467eae 2208 pr_err("ERROR: IPv6 link address not available\n");
1da177e4 2209 }
222f1806 2210 } else {
68bf9f0b
AW		 2211 if (pkt_dev->min_pkt_size == 0) {
2212 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2213 + sizeof(struct udphdr)
2214 + sizeof(struct pktgen_hdr)
2215 + pkt_dev->pkt_overhead;
2216 }
2217
1da177e4
LT		 2218 pkt_dev->saddr_min = 0;
2219 pkt_dev->saddr_max = 0;
2220 if (strlen(pkt_dev->src_min) == 0) {
222f1806
LC		 2221
2222 struct in_device *in_dev;
1da177e4
LT		 2223
2224 rcu_read_lock();
e5ed6399 2225 in_dev = __in_dev_get_rcu(pkt_dev->odev);
1da177e4 2226 if (in_dev) {
2638eb8b
FW		 2227 const struct in_ifaddr *ifa;
2228
2229 ifa = rcu_dereference(in_dev->ifa_list);
2230 if (ifa) {
2231 pkt_dev->saddr_min = ifa->ifa_address;
1da177e4
LT		 2232 pkt_dev->saddr_max = pkt_dev->saddr_min;
2233 }
1da177e4
LT		 2234 }
2235 rcu_read_unlock();
222f1806 2236 } else {
1da177e4
LT		 2237 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2238 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2239 }
2240
2241 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2242 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2243 }
222f1806 2244 /* Initialize current values. */
68bf9f0b
AW		 2245 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2246 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2247 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2248
222f1806
LC		 2249 pkt_dev->cur_dst_mac_offset = 0;
2250 pkt_dev->cur_src_mac_offset = 0;
2251 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2252 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2253 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2254 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1da177e4
LT		 2255 pkt_dev->nflows = 0;
2256}
2257
fd29cf72
SH		 2258
2259static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2260{
ef87979c 2261 ktime_t start_time, end_time;
417bc4b8 2262 s64 remaining;
2bc481cf
SH		 2263 struct hrtimer_sleeper t;
2264
dbc1625f 2265 hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2bc481cf
SH		 2266 hrtimer_set_expires(&t.timer, spin_until);
2267
43d28b65 2268 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
bcf91bdb
GR		 2269 if (remaining <= 0)
2270 goto out;
2bc481cf 2271
398f382c 2272 start_time = ktime_get();
33136d12
ED		 2273 if (remaining < 100000) {
2274 /* for small delays (<100us), just loop until limit is reached */
2275 do {
398f382c
DB		 2276 end_time = ktime_get();
2277 } while (ktime_compare(end_time, spin_until) < 0);
33136d12 2278 } else {
2bc481cf
SH		 2279 do {
2280 set_current_state(TASK_INTERRUPTIBLE);
9dd8813e 2281 hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS);
2bc481cf
SH		 2282
2283 if (likely(t.task))
1da177e4 2284 schedule();
1da177e4 2285
2bc481cf
SH		 2286 hrtimer_cancel(&t.timer);
2287 } while (t.task && pkt_dev->running && !signal_pending(current));
2288 __set_current_state(TASK_RUNNING);
398f382c 2289 end_time = ktime_get();
1da177e4 2290 }
ef87979c
SH		 2291
2292 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
bcf91bdb 2293out:
07a0f0f0 2294 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
bcf91bdb 2295 destroy_hrtimer_on_stack(&t.timer);
1da177e4
LT		 2296}
2297
16dab72f
JHS		 2298static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2299{
63d75463 2300 pkt_dev->pkt_overhead = 0;
16dab72f
JHS		 2301 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2302 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2303 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2304}
2305
648fda74 2306static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
007a531b 2307{
648fda74 2308 return !!(pkt_dev->flows[flow].flags & F_INIT);
007a531b
JHS		 2309}
2310
2311static inline int f_pick(struct pktgen_dev *pkt_dev)
2312{
2313 int flow = pkt_dev->curfl;
2314
2315 if (pkt_dev->flags & F_FLOW_SEQ) {
2316 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2317 /* reset time */
2318 pkt_dev->flows[flow].count = 0;
1211a645 2319 pkt_dev->flows[flow].flags = 0;
007a531b
JHS		 2320 pkt_dev->curfl += 1;
2321 if (pkt_dev->curfl >= pkt_dev->cflows)
2322 pkt_dev->curfl = 0; /*reset */
2323 }
2324 } else {
33d7c5e5 2325 flow = prandom_u32() % pkt_dev->cflows;
1211a645 2326 pkt_dev->curfl = flow;
007a531b 2327
1211a645 2328 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
007a531b 2329 pkt_dev->flows[flow].count = 0;
1211a645
RO		 2330 pkt_dev->flows[flow].flags = 0;
2331 }
007a531b
JHS		 2332 }
2333
2334 return pkt_dev->curfl;
2335}
2336
a553e4a6
JHS		 2337
2338#ifdef CONFIG_XFRM
2339/* If there was already an IPSEC SA, we keep it as is, else
2340 * we go look for it ...
2341*/
bd55775c 2342#define DUMMY_MARK 0
fea1ab0f 2343static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
a553e4a6
JHS		 2344{
2345 struct xfrm_state *x = pkt_dev->flows[flow].x;
4e58a027 2346 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
a553e4a6 2347 if (!x) {
c454997e
FD		 2348
2349 if (pkt_dev->spi) {
2350 /* We need as quick as possible to find the right SA
2351 * Searching with minimum criteria to archieve this.
2352 */
2353 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2354 } else {
2355 /* slow path: we dont already have xfrm_state */
7e652640 2356 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
c454997e
FD		 2357 (xfrm_address_t *)&pkt_dev->cur_daddr,
2358 (xfrm_address_t *)&pkt_dev->cur_saddr,
2359 AF_INET,
2360 pkt_dev->ipsmode,
2361 pkt_dev->ipsproto, 0);
2362 }
a553e4a6
JHS		 2363 if (x) {
2364 pkt_dev->flows[flow].x = x;
2365 set_pkt_overhead(pkt_dev);
63adc6fb 2366 pkt_dev->pkt_overhead += x->props.header_len;
a553e4a6
JHS		 2367 }
2368
2369 }
2370}
2371#endif
fd2ea0a7
DM		 2372static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2373{
e6fce5b9
RO		 2374
2375 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2376 pkt_dev->cur_queue_map = smp_processor_id();
2377
896a7cf8 2378 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
fd2ea0a7
DM		 2379 __u16 t;
2380 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
33d7c5e5 2381 t = prandom_u32() %
fd2ea0a7
DM		 2382 (pkt_dev->queue_map_max -
2383 pkt_dev->queue_map_min + 1)
2384 + pkt_dev->queue_map_min;
2385 } else {
2386 t = pkt_dev->cur_queue_map + 1;
2387 if (t > pkt_dev->queue_map_max)
2388 t = pkt_dev->queue_map_min;
2389 }
2390 pkt_dev->cur_queue_map = t;
2391 }
bfdbc0ac 2392 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
fd2ea0a7
DM		 2393}
2394
1da177e4
LT		 2395/* Increment/randomize headers according to flags and current values
2396 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2397 */
222f1806
LC		 2398static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2399{
2400 __u32 imn;
2401 __u32 imx;
2402 int flow = 0;
1da177e4 2403
007a531b
JHS		 2404 if (pkt_dev->cflows)
2405 flow = f_pick(pkt_dev);
1da177e4
LT		 2406
2407 /* Deal with source MAC */
222f1806
LC		 2408 if (pkt_dev->src_mac_count > 1) {
2409 __u32 mc;
2410 __u32 tmp;
2411
2412 if (pkt_dev->flags & F_MACSRC_RND)
33d7c5e5 2413 mc = prandom_u32() % pkt_dev->src_mac_count;
222f1806
LC		 2414 else {
2415 mc = pkt_dev->cur_src_mac_offset++;
ff2a79a5 2416 if (pkt_dev->cur_src_mac_offset >=
222f1806
LC		 2417 pkt_dev->src_mac_count)
2418 pkt_dev->cur_src_mac_offset = 0;
2419 }
2420
2421 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2422 pkt_dev->hh[11] = tmp;
2423 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2424 pkt_dev->hh[10] = tmp;
2425 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2426 pkt_dev->hh[9] = tmp;
2427 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2428 pkt_dev->hh[8] = tmp;
2429 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2430 pkt_dev->hh[7] = tmp;
2431 }
2432
2433 /* Deal with Destination MAC */
2434 if (pkt_dev->dst_mac_count > 1) {
2435 __u32 mc;
2436 __u32 tmp;
2437
2438 if (pkt_dev->flags & F_MACDST_RND)
33d7c5e5 2439 mc = prandom_u32() % pkt_dev->dst_mac_count;
222f1806
LC		 2440
2441 else {
2442 mc = pkt_dev->cur_dst_mac_offset++;
ff2a79a5 2443 if (pkt_dev->cur_dst_mac_offset >=
222f1806
LC		 2444 pkt_dev->dst_mac_count) {
2445 pkt_dev->cur_dst_mac_offset = 0;
2446 }
2447 }
2448
2449 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2450 pkt_dev->hh[5] = tmp;
2451 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2452 pkt_dev->hh[4] = tmp;
2453 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2454 pkt_dev->hh[3] = tmp;
2455 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2456 pkt_dev->hh[2] = tmp;
2457 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2458 pkt_dev->hh[1] = tmp;
2459 }
2460
ca6549af 2461 if (pkt_dev->flags & F_MPLS_RND) {
95c96174 2462 unsigned int i;
e71a4783 2463 for (i = 0; i < pkt_dev->nr_labels; i++)
ca6549af
SW		 2464 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2465 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
33d7c5e5 2466 ((__force __be32)prandom_u32() &
ca6549af
SW		 2467 htonl(0x000fffff));
2468 }
2469
34954ddc 2470 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
33d7c5e5 2471 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
34954ddc
FF		 2472 }
2473
2474 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
33d7c5e5 2475 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
34954ddc
FF		 2476 }
2477
222f1806
LC		 2478 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2479 if (pkt_dev->flags & F_UDPSRC_RND)
33d7c5e5 2480 pkt_dev->cur_udp_src = prandom_u32() %
5fa6fc76
SH		 2481 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2482 + pkt_dev->udp_src_min;
222f1806
LC		 2483
2484 else {
1da177e4
LT		 2485 pkt_dev->cur_udp_src++;
2486 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2487 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
222f1806
LC		 2488 }
2489 }
2490
2491 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2492 if (pkt_dev->flags & F_UDPDST_RND) {
33d7c5e5 2493 pkt_dev->cur_udp_dst = prandom_u32() %
5fa6fc76
SH		 2494 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2495 + pkt_dev->udp_dst_min;
222f1806 2496 } else {
1da177e4 2497 pkt_dev->cur_udp_dst++;
222f1806 2498 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1da177e4 2499 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
222f1806
LC		 2500 }
2501 }
1da177e4
LT		 2502
2503 if (!(pkt_dev->flags & F_IPV6)) {
2504
63adc6fb
SH		 2505 imn = ntohl(pkt_dev->saddr_min);
2506 imx = ntohl(pkt_dev->saddr_max);
2507 if (imn < imx) {
1da177e4 2508 __u32 t;
222f1806 2509 if (pkt_dev->flags & F_IPSRC_RND)
33d7c5e5 2510 t = prandom_u32() % (imx - imn) + imn;
1da177e4
LT		 2511 else {
2512 t = ntohl(pkt_dev->cur_saddr);
2513 t++;
63adc6fb 2514 if (t > imx)
1da177e4 2515 t = imn;
63adc6fb 2516
1da177e4
LT		 2517 }
2518 pkt_dev->cur_saddr = htonl(t);
2519 }
222f1806 2520
007a531b 2521 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
1da177e4
LT		 2522 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2523 } else {
252e3346
AV		 2524 imn = ntohl(pkt_dev->daddr_min);
2525 imx = ntohl(pkt_dev->daddr_max);
2526 if (imn < imx) {
1da177e4 2527 __u32 t;
252e3346 2528 __be32 s;
1da177e4
LT		 2529 if (pkt_dev->flags & F_IPDST_RND) {
2530
70e3ba72 2531 do {
33d7c5e5
AM		 2532 t = prandom_u32() %
2533 (imx - imn) + imn;
252e3346 2534 s = htonl(t);
70e3ba72
AM		 2535 } while (ipv4_is_loopback(s) ||
2536 ipv4_is_multicast(s) ||
2537 ipv4_is_lbcast(s) ||
2538 ipv4_is_zeronet(s) ||
2539 ipv4_is_local_multicast(s));
252e3346
AV		 2540 pkt_dev->cur_daddr = s;
2541 } else {
1da177e4
LT		 2542 t = ntohl(pkt_dev->cur_daddr);
2543 t++;
2544 if (t > imx) {
2545 t = imn;
2546 }
2547 pkt_dev->cur_daddr = htonl(t);
2548 }
2549 }
222f1806 2550 if (pkt_dev->cflows) {
007a531b 2551 pkt_dev->flows[flow].flags |= F_INIT;
222f1806
LC		 2552 pkt_dev->flows[flow].cur_daddr =
2553 pkt_dev->cur_daddr;
a553e4a6 2554#ifdef CONFIG_XFRM
6f107c74 2555 if (pkt_dev->flags & F_IPSEC)
a553e4a6
JHS		 2556 get_ipsec_sa(pkt_dev, flow);
2557#endif
1da177e4
LT		 2558 pkt_dev->nflows++;
2559 }
2560 }
222f1806
LC		 2561 } else { /* IPV6 * */
2562
06e30411 2563 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
1da177e4
LT		 2564 int i;
2565
2566 /* Only random destinations yet */
2567
222f1806 2568 for (i = 0; i < 4; i++) {
1da177e4 2569 pkt_dev->cur_in6_daddr.s6_addr32[i] =
33d7c5e5 2570 (((__force __be32)prandom_u32() |
222f1806
LC		 2571 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2572 pkt_dev->max_in6_daddr.s6_addr32[i]);
1da177e4 2573 }
222f1806 2574 }
1da177e4
LT		 2575 }
2576
222f1806
LC		 2577 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2578 __u32 t;
2579 if (pkt_dev->flags & F_TXSIZE_RND) {
33d7c5e5 2580 t = prandom_u32() %
5fa6fc76
SH		 2581 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2582 + pkt_dev->min_pkt_size;
222f1806 2583 } else {
1da177e4 2584 t = pkt_dev->cur_pkt_size + 1;
222f1806 2585 if (t > pkt_dev->max_pkt_size)
1da177e4 2586 t = pkt_dev->min_pkt_size;
222f1806
LC		 2587 }
2588 pkt_dev->cur_pkt_size = t;
90149031
NR		 2589 } else if (pkt_dev->n_imix_entries > 0) {
2590 struct imix_pkt *entry;
2591 __u32 t = prandom_u32() % IMIX_PRECISION;
2592 __u8 entry_index = pkt_dev->imix_distribution[t];
2593
2594 entry = &pkt_dev->imix_entries[entry_index];
2595 entry->count_so_far++;
2596 pkt_dev->cur_pkt_size = entry->size;
222f1806 2597 }
1da177e4 2598
fd2ea0a7 2599 set_cur_queue_map(pkt_dev);
45b270f8 2600
1da177e4
LT		 2601 pkt_dev->flows[flow].count++;
2602}
2603
7e5a3ef6
NR		 2604static void fill_imix_distribution(struct pktgen_dev *pkt_dev)
2605{
2606 int cumulative_probabilites[MAX_IMIX_ENTRIES];
2607 int j = 0;
2608 __u64 cumulative_prob = 0;
2609 __u64 total_weight = 0;
2610 int i = 0;
2611
2612 for (i = 0; i < pkt_dev->n_imix_entries; i++)
2613 total_weight += pkt_dev->imix_entries[i].weight;
2614
2615 /* Fill cumulative_probabilites with sum of normalized probabilities */
2616 for (i = 0; i < pkt_dev->n_imix_entries - 1; i++) {
2617 cumulative_prob += div64_u64(pkt_dev->imix_entries[i].weight *
2618 IMIX_PRECISION,
2619 total_weight);
2620 cumulative_probabilites[i] = cumulative_prob;
2621 }
2622 cumulative_probabilites[pkt_dev->n_imix_entries - 1] = 100;
2623
2624 for (i = 0; i < IMIX_PRECISION; i++) {
2625 if (i == cumulative_probabilites[j])
2626 j++;
2627 pkt_dev->imix_distribution[i] = j;
2628 }
2629}
a553e4a6
JHS		 2630
2631#ifdef CONFIG_XFRM
5537a055 2632static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
cf93d47e
FD		 2633
2634 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2635};
2636
a553e4a6
JHS		 2637static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2638{
2639 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2640 int err = 0;
6de9ace4 2641 struct net *net = dev_net(pkt_dev->odev);
a553e4a6
JHS		 2642
2643 if (!x)
2644 return 0;
2645 /* XXX: we dont support tunnel mode for now until
2646 * we resolve the dst issue */
cf93d47e 2647 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
a553e4a6
JHS		 2648 return 0;
2649
cf93d47e
FD		 2650 /* But when user specify an valid SPI, transformation
2651 * supports both transport/tunnel mode + ESP/AH type.
2652 */
2653 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
b6ca8bd5 2654 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
cf93d47e
FD		 2655
2656 rcu_read_lock_bh();
0c620e97 2657 err = pktgen_xfrm_outer_mode_output(x, skb);
cf93d47e 2658 rcu_read_unlock_bh();
6de9ace4
FD		 2659 if (err) {
2660 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
a553e4a6 2661 goto error;
6de9ace4 2662 }
a553e4a6 2663 err = x->type->output(x, skb);
6de9ace4
FD		 2664 if (err) {
2665 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
a553e4a6 2666 goto error;
6de9ace4 2667 }
0af0a413 2668 spin_lock_bh(&x->lock);
63adc6fb 2669 x->curlft.bytes += skb->len;
a553e4a6 2670 x->curlft.packets++;
0af0a413 2671 spin_unlock_bh(&x->lock);
a553e4a6 2672error:
a553e4a6
JHS		 2673 return err;
2674}
2675
475ac1e4 2676static void free_SAs(struct pktgen_dev *pkt_dev)
a553e4a6
JHS		 2677{
2678 if (pkt_dev->cflows) {
2679 /* let go of the SAs if we have them */
d6182223
PG		 2680 int i;
2681 for (i = 0; i < pkt_dev->cflows; i++) {
a553e4a6
JHS		 2682 struct xfrm_state *x = pkt_dev->flows[i].x;
2683 if (x) {
2684 xfrm_state_put(x);
2685 pkt_dev->flows[i].x = NULL;
2686 }
2687 }
2688 }
2689}
2690
475ac1e4 2691static int process_ipsec(struct pktgen_dev *pkt_dev,
a553e4a6
JHS		 2692 struct sk_buff *skb, __be16 protocol)
2693{
6f107c74 2694 if (pkt_dev->flags & F_IPSEC) {
a553e4a6
JHS		 2695 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2696 int nhead = 0;
2697 if (x) {
d4969581 2698 struct ethhdr *eth;
3868204d 2699 struct iphdr *iph;
d4969581 2700 int ret;
3868204d 2701
a553e4a6 2702 nhead = x->props.header_len - skb_headroom(skb);
63adc6fb 2703 if (nhead > 0) {
a553e4a6
JHS		 2704 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2705 if (ret < 0) {
f9467eae
JP		 2706 pr_err("Error expanding ipsec packet %d\n",
2707 ret);
b4bb4ac8 2708 goto err;
a553e4a6
JHS		 2709 }
2710 }
2711
2712 /* ipsec is not expecting ll header */
2713 skb_pull(skb, ETH_HLEN);
2714 ret = pktgen_output_ipsec(skb, pkt_dev);
2715 if (ret) {
f9467eae 2716 pr_err("Error creating ipsec packet %d\n", ret);
b4bb4ac8 2717 goto err;
a553e4a6
JHS		 2718 }
2719 /* restore ll */
d58ff351 2720 eth = skb_push(skb, ETH_HLEN);
d4969581
ED		 2721 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2722 eth->h_proto = protocol;
3868204d 2723
2724 /* Update IPv4 header len as well as checksum value */
2725 iph = ip_hdr(skb);
2726 iph->tot_len = htons(skb->len - ETH_HLEN);
2727 ip_send_check(iph);
a553e4a6
JHS		 2728 }
2729 }
2730 return 1;
b4bb4ac8
IJ		 2731err:
2732 kfree_skb(skb);
2733 return 0;
a553e4a6
JHS		 2734}
2735#endif
2736
ca6549af
SW		 2737static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2738{
95c96174 2739 unsigned int i;
63adc6fb 2740 for (i = 0; i < pkt_dev->nr_labels; i++)
ca6549af 2741 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
63adc6fb 2742
ca6549af
SW		 2743 mpls--;
2744 *mpls |= MPLS_STACK_BOTTOM;
2745}
2746
0f37c605
AV		 2747static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2748 unsigned int prio)
2749{
2750 return htons(id | (cfi << 12) | (prio << 13));
2751}
2752
26ad7879
ED		 2753static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2754 int datalen)
2755{
7f5d3f27 2756 struct timespec64 timestamp;
26ad7879
ED		 2757 struct pktgen_hdr *pgh;
2758
4df864c1 2759 pgh = skb_put(skb, sizeof(*pgh));
26ad7879
ED		 2760 datalen -= sizeof(*pgh);
2761
2762 if (pkt_dev->nfrags <= 0) {
b080db58 2763 skb_put_zero(skb, datalen);
26ad7879
ED		 2764 } else {
2765 int frags = pkt_dev->nfrags;
2766 int i, len;
7d36a991 2767 int frag_len;
26ad7879
ED		 2768
2769
2770 if (frags > MAX_SKB_FRAGS)
2771 frags = MAX_SKB_FRAGS;
2772 len = datalen - frags * PAGE_SIZE;
2773 if (len > 0) {
b080db58 2774 skb_put_zero(skb, len);
26ad7879
ED		 2775 datalen = frags * PAGE_SIZE;
2776 }
2777
2778 i = 0;
7d36a991 2779 frag_len = (datalen/frags) < PAGE_SIZE ?
2780 (datalen/frags) : PAGE_SIZE;
26ad7879
ED		 2781 while (datalen > 0) {
2782 if (unlikely(!pkt_dev->page)) {
2783 int node = numa_node_id();
2784
2785 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2786 node = pkt_dev->node;
2787 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2788 if (!pkt_dev->page)
2789 break;
2790 }
a0bec1cd 2791 get_page(pkt_dev->page);
ea2ab693 2792 skb_frag_set_page(skb, i, pkt_dev->page);
b54c9d5b 2793 skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0);
7d36a991 2794 /*last fragment, fill rest of data*/
2795 if (i == (frags - 1))
9e903e08
ED		 2796 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2797 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
7d36a991 2798 else
9e903e08
ED		 2799 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2800 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2801 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2802 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
26ad7879
ED		 2803 i++;
2804 skb_shinfo(skb)->nr_frags = i;
2805 }
26ad7879
ED		 2806 }
2807
2808 /* Stamp the time, and sequence number,
2809 * convert them to network byte order
2810 */
2811 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2812 pgh->seq_num = htonl(pkt_dev->seq_num);
2813
afb84b62
JDB		 2814 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2815 pgh->tv_sec = 0;
2816 pgh->tv_usec = 0;
2817 } else {
7f5d3f27
AB		 2818 /*
2819 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2820 * as done by wireshark, or y2038 when interpreted as signed.
2821 * This is probably harmless, but if anyone wants to improve
2822 * it, we could introduce a variant that puts 64-bit nanoseconds
2823 * into the respective header bytes.
2824 * This would also be slightly faster to read.
2825 */
2826 ktime_get_real_ts64(&timestamp);
afb84b62 2827 pgh->tv_sec = htonl(timestamp.tv_sec);
7f5d3f27 2828 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
afb84b62 2829 }
26ad7879
ED		 2830}
2831
7a6e288d 2832static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
63d75463 2833 struct pktgen_dev *pkt_dev)
7a6e288d 2834{
63d75463 2835 unsigned int extralen = LL_RESERVED_SPACE(dev);
7a6e288d 2836 struct sk_buff *skb = NULL;
63d75463 2837 unsigned int size;
7a6e288d 2838
63d75463 2839 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
7a6e288d
DB		 2840 if (pkt_dev->flags & F_NODE) {
2841 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2842
2843 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2844 if (likely(skb)) {
2845 skb_reserve(skb, NET_SKB_PAD);
2846 skb->dev = dev;
2847 }
2848 } else {
2849 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2850 }
3de03596 2851
63d75463 2852 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
3de03596 2853 if (likely(skb))
63d75463 2854 skb_reserve(skb, extralen - 16);
7a6e288d
DB		 2855
2856 return skb;
2857}
2858
222f1806
LC		 2859static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2860 struct pktgen_dev *pkt_dev)
1da177e4
LT		 2861{
2862 struct sk_buff *skb = NULL;
2863 __u8 *eth;
2864 struct udphdr *udph;
2865 int datalen, iplen;
2866 struct iphdr *iph;
d5f1ce9a 2867 __be16 protocol = htons(ETH_P_IP);
ca6549af 2868 __be32 *mpls;
34954ddc
FF		 2869 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2870 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2871 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2872 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
fd2ea0a7 2873 u16 queue_map;
ca6549af
SW		 2874
2875 if (pkt_dev->nr_labels)
d5f1ce9a 2876 protocol = htons(ETH_P_MPLS_UC);
222f1806 2877
34954ddc 2878 if (pkt_dev->vlan_id != 0xffff)
d5f1ce9a 2879 protocol = htons(ETH_P_8021Q);
34954ddc 2880
64053bee
RO		 2881 /* Update any of the values, used when we're incrementing various
2882 * fields.
2883 */
2884 mod_cur_headers(pkt_dev);
eb589063 2885 queue_map = pkt_dev->cur_queue_map;
64053bee 2886
63d75463 2887 skb = pktgen_alloc_skb(odev, pkt_dev);
1da177e4
LT		 2888 if (!skb) {
2889 sprintf(pkt_dev->result, "No memory");
2890 return NULL;
2891 }
2892
7a6e288d 2893 prefetchw(skb->data);
63d75463 2894 skb_reserve(skb, 16);
1da177e4
LT		 2895
2896 /* Reserve for ethernet and IP header */
d58ff351 2897 eth = skb_push(skb, 14);
4df864c1 2898 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
ca6549af
SW		 2899 if (pkt_dev->nr_labels)
2900 mpls_push(mpls, pkt_dev);
34954ddc
FF		 2901
2902 if (pkt_dev->vlan_id != 0xffff) {
e71a4783 2903 if (pkt_dev->svlan_id != 0xffff) {
4df864c1 2904 svlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 2905 *svlan_tci = build_tci(pkt_dev->svlan_id,
2906 pkt_dev->svlan_cfi,
2907 pkt_dev->svlan_p);
4df864c1
JB		 2908 svlan_encapsulated_proto = skb_put(skb,
2909 sizeof(__be16));
d5f1ce9a 2910 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
34954ddc 2911 }
4df864c1 2912 vlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 2913 *vlan_tci = build_tci(pkt_dev->vlan_id,
2914 pkt_dev->vlan_cfi,
2915 pkt_dev->vlan_p);
4df864c1 2916 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
d5f1ce9a 2917 *vlan_encapsulated_proto = htons(ETH_P_IP);
34954ddc
FF		 2918 }
2919
c145aeb3 2920 skb_reset_mac_header(skb);
525cebed 2921 skb_set_network_header(skb, skb->len);
4df864c1 2922 iph = skb_put(skb, sizeof(struct iphdr));
525cebed
TG		 2923
2924 skb_set_transport_header(skb, skb->len);
4df864c1 2925 udph = skb_put(skb, sizeof(struct udphdr));
fd2ea0a7 2926 skb_set_queue_mapping(skb, queue_map);
9e50e3ac
JF		 2927 skb->priority = pkt_dev->skb_priority;
2928
1da177e4 2929 memcpy(eth, pkt_dev->hh, 12);
252e3346 2930 *(__be16 *) & eth[12] = protocol;
1da177e4 2931
ca6549af
SW		 2932 /* Eth + IPh + UDPh + mpls */
2933 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
16dab72f 2934 pkt_dev->pkt_overhead;
6af773e7 2935 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
1da177e4 2936 datalen = sizeof(struct pktgen_hdr);
222f1806 2937
1da177e4
LT		 2938 udph->source = htons(pkt_dev->cur_udp_src);
2939 udph->dest = htons(pkt_dev->cur_udp_dst);
222f1806 2940 udph->len = htons(datalen + 8); /* DATA + udphdr */
c26bf4a5 2941 udph->check = 0;
1da177e4
LT		 2942
2943 iph->ihl = 5;
2944 iph->version = 4;
2945 iph->ttl = 32;
1ca7768c 2946 iph->tos = pkt_dev->tos;
222f1806 2947 iph->protocol = IPPROTO_UDP; /* UDP */
1da177e4
LT		 2948 iph->saddr = pkt_dev->cur_saddr;
2949 iph->daddr = pkt_dev->cur_daddr;
66ed1e5e
ED		 2950 iph->id = htons(pkt_dev->ip_id);
2951 pkt_dev->ip_id++;
1da177e4
LT		 2952 iph->frag_off = 0;
2953 iplen = 20 + 8 + datalen;
2954 iph->tot_len = htons(iplen);
03c633e7 2955 ip_send_check(iph);
ca6549af 2956 skb->protocol = protocol;
1da177e4
LT		 2957 skb->dev = odev;
2958 skb->pkt_type = PACKET_HOST;
c26bf4a5 2959
7744b5f3
SD		 2960 pktgen_finalize_skb(pkt_dev, skb, datalen);
2961
c26bf4a5
TG		 2962 if (!(pkt_dev->flags & F_UDPCSUM)) {
2963 skb->ip_summed = CHECKSUM_NONE;
c8cd0989 2964 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
c26bf4a5
TG		 2965 skb->ip_summed = CHECKSUM_PARTIAL;
2966 skb->csum = 0;
7744b5f3 2967 udp4_hwcsum(skb, iph->saddr, iph->daddr);
c26bf4a5 2968 } else {
7744b5f3 2969 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
c26bf4a5
TG		 2970
2971 /* add protocol-dependent pseudo-header */
7744b5f3 2972 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
c26bf4a5
TG		 2973 datalen + 8, IPPROTO_UDP, csum);
2974
2975 if (udph->check == 0)
2976 udph->check = CSUM_MANGLED_0;
2977 }
2978
a553e4a6
JHS		 2979#ifdef CONFIG_XFRM
2980 if (!process_ipsec(pkt_dev, skb, protocol))
2981 return NULL;
2982#endif
2983
1da177e4
LT		 2984 return skb;
2985}
2986
222f1806
LC		 2987static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2988 struct pktgen_dev *pkt_dev)
1da177e4
LT		 2989{
2990 struct sk_buff *skb = NULL;
2991 __u8 *eth;
2992 struct udphdr *udph;
c26bf4a5 2993 int datalen, udplen;
1da177e4 2994 struct ipv6hdr *iph;
d5f1ce9a 2995 __be16 protocol = htons(ETH_P_IPV6);
ca6549af 2996 __be32 *mpls;
34954ddc
FF		 2997 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2998 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2999 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
3000 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
fd2ea0a7 3001 u16 queue_map;
ca6549af
SW		 3002
3003 if (pkt_dev->nr_labels)
d5f1ce9a 3004 protocol = htons(ETH_P_MPLS_UC);
64053bee 3005
34954ddc 3006 if (pkt_dev->vlan_id != 0xffff)
d5f1ce9a 3007 protocol = htons(ETH_P_8021Q);
34954ddc 3008
64053bee
RO		 3009 /* Update any of the values, used when we're incrementing various
3010 * fields.
3011 */
3012 mod_cur_headers(pkt_dev);
eb589063 3013 queue_map = pkt_dev->cur_queue_map;
64053bee 3014
63d75463 3015 skb = pktgen_alloc_skb(odev, pkt_dev);
1da177e4
LT		 3016 if (!skb) {
3017 sprintf(pkt_dev->result, "No memory");
3018 return NULL;
3019 }
3020
7a6e288d 3021 prefetchw(skb->data);
1da177e4
LT		 3022 skb_reserve(skb, 16);
3023
3024 /* Reserve for ethernet and IP header */
d58ff351 3025 eth = skb_push(skb, 14);
4df864c1 3026 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
ca6549af
SW		 3027 if (pkt_dev->nr_labels)
3028 mpls_push(mpls, pkt_dev);
34954ddc
FF		 3029
3030 if (pkt_dev->vlan_id != 0xffff) {
e71a4783 3031 if (pkt_dev->svlan_id != 0xffff) {
4df864c1 3032 svlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 3033 *svlan_tci = build_tci(pkt_dev->svlan_id,
3034 pkt_dev->svlan_cfi,
3035 pkt_dev->svlan_p);
4df864c1
JB		 3036 svlan_encapsulated_proto = skb_put(skb,
3037 sizeof(__be16));
d5f1ce9a 3038 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
34954ddc 3039 }
4df864c1 3040 vlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 3041 *vlan_tci = build_tci(pkt_dev->vlan_id,
3042 pkt_dev->vlan_cfi,
3043 pkt_dev->vlan_p);
4df864c1 3044 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
d5f1ce9a 3045 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
34954ddc
FF		 3046 }
3047
c145aeb3 3048 skb_reset_mac_header(skb);
525cebed 3049 skb_set_network_header(skb, skb->len);
4df864c1 3050 iph = skb_put(skb, sizeof(struct ipv6hdr));
525cebed
TG		 3051
3052 skb_set_transport_header(skb, skb->len);
4df864c1 3053 udph = skb_put(skb, sizeof(struct udphdr));
fd2ea0a7 3054 skb_set_queue_mapping(skb, queue_map);
9e50e3ac 3055 skb->priority = pkt_dev->skb_priority;
1da177e4 3056
1da177e4 3057 memcpy(eth, pkt_dev->hh, 12);
63adc6fb 3058 *(__be16 *) &eth[12] = protocol;
64053bee 3059
ca6549af
SW		 3060 /* Eth + IPh + UDPh + mpls */
3061 datalen = pkt_dev->cur_pkt_size - 14 -
3062 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
16dab72f 3063 pkt_dev->pkt_overhead;
1da177e4 3064
5aa8b572 3065 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
1da177e4 3066 datalen = sizeof(struct pktgen_hdr);
e87cc472 3067 net_info_ratelimited("increased datalen to %d\n", datalen);
1da177e4
LT		 3068 }
3069
c26bf4a5 3070 udplen = datalen + sizeof(struct udphdr);
1da177e4
LT		 3071 udph->source = htons(pkt_dev->cur_udp_src);
3072 udph->dest = htons(pkt_dev->cur_udp_dst);
c26bf4a5
TG		 3073 udph->len = htons(udplen);
3074 udph->check = 0;
1da177e4 3075
d5f1ce9a 3076 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
1da177e4 3077
1ca7768c
FF		 3078 if (pkt_dev->traffic_class) {
3079 /* Version + traffic class + flow (0) */
252e3346 3080 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
1ca7768c
FF		 3081 }
3082
1da177e4
LT		 3083 iph->hop_limit = 32;
3084
c26bf4a5 3085 iph->payload_len = htons(udplen);
1da177e4
LT		 3086 iph->nexthdr = IPPROTO_UDP;
3087
4e3fd7a0
AD		 3088 iph->daddr = pkt_dev->cur_in6_daddr;
3089 iph->saddr = pkt_dev->cur_in6_saddr;
1da177e4 3090
ca6549af 3091 skb->protocol = protocol;
1da177e4
LT		 3092 skb->dev = odev;
3093 skb->pkt_type = PACKET_HOST;
3094
7744b5f3
SD		 3095 pktgen_finalize_skb(pkt_dev, skb, datalen);
3096
c26bf4a5
TG		 3097 if (!(pkt_dev->flags & F_UDPCSUM)) {
3098 skb->ip_summed = CHECKSUM_NONE;
c8cd0989 3099 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
c26bf4a5
TG		 3100 skb->ip_summed = CHECKSUM_PARTIAL;
3101 skb->csum_start = skb_transport_header(skb) - skb->head;
3102 skb->csum_offset = offsetof(struct udphdr, check);
3103 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3104 } else {
7744b5f3 3105 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
c26bf4a5
TG		 3106
3107 /* add protocol-dependent pseudo-header */
3108 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3109
3110 if (udph->check == 0)
3111 udph->check = CSUM_MANGLED_0;
3112 }
3113
1da177e4
LT		 3114 return skb;
3115}
3116
475ac1e4
SH		 3117static struct sk_buff *fill_packet(struct net_device *odev,
3118 struct pktgen_dev *pkt_dev)
1da177e4 3119{
222f1806 3120 if (pkt_dev->flags & F_IPV6)
1da177e4
LT		 3121 return fill_packet_ipv6(odev, pkt_dev);
3122 else
3123 return fill_packet_ipv4(odev, pkt_dev);
3124}
3125
222f1806 3126static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
1da177e4 3127{
222f1806
LC		 3128 pkt_dev->seq_num = 1;
3129 pkt_dev->idle_acc = 0;
1da177e4 3130 pkt_dev->sofar = 0;
222f1806
LC		 3131 pkt_dev->tx_bytes = 0;
3132 pkt_dev->errors = 0;
1da177e4
LT		 3133}
3134
3135/* Set up structure for sending pkts, clear counters */
3136
3137static void pktgen_run(struct pktgen_thread *t)
3138{
c26a8016 3139 struct pktgen_dev *pkt_dev;
1da177e4
LT		 3140 int started = 0;
3141
f9467eae 3142 func_enter();
1da177e4 3143
8788370a
JDB		 3144 rcu_read_lock();
3145 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
1da177e4
LT		 3146
3147 /*
3148 * setup odev and create initial packet.
3149 */
3150 pktgen_setup_inject(pkt_dev);
3151
222f1806 3152 if (pkt_dev->odev) {
1da177e4 3153 pktgen_clear_counters(pkt_dev);
1da177e4 3154 pkt_dev->skb = NULL;
398f382c 3155 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
fd29cf72 3156
16dab72f 3157 set_pkt_overhead(pkt_dev);
222f1806 3158
1da177e4 3159 strcpy(pkt_dev->result, "Starting");
8788370a 3160 pkt_dev->running = 1; /* Cranke yeself! */
1da177e4 3161 started++;
222f1806 3162 } else
1da177e4
LT		 3163 strcpy(pkt_dev->result, "Error starting");
3164 }
8788370a 3165 rcu_read_unlock();
222f1806
LC		 3166 if (started)
3167 t->control &= ~(T_STOP);
1da177e4
LT		 3168}
3169
cda9de0b 3170static void pktgen_handle_all_threads(struct pktgen_net *pn, u32 flags)
1da177e4 3171{
cdcdbe0b 3172 struct pktgen_thread *t;
1da177e4 3173
6146e6a4 3174 mutex_lock(&pktgen_thread_lock);
cdcdbe0b 3175
4e58a027 3176 list_for_each_entry(t, &pn->pktgen_threads, th_list)
cda9de0b 3177 t->control |= (flags);
cdcdbe0b 3178
6146e6a4 3179 mutex_unlock(&pktgen_thread_lock);
1da177e4
LT		 3180}
3181
cda9de0b
YD		 3182static void pktgen_stop_all_threads(struct pktgen_net *pn)
3183{
3184 func_enter();
3185
3186 pktgen_handle_all_threads(pn, T_STOP);
3187}
3188
648fda74 3189static int thread_is_running(const struct pktgen_thread *t)
1da177e4 3190{
648fda74 3191 const struct pktgen_dev *pkt_dev;
1da177e4 3192
8788370a
JDB		 3193 rcu_read_lock();
3194 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3195 if (pkt_dev->running) {
3196 rcu_read_unlock();
648fda74 3197 return 1;
8788370a
JDB		 3198 }
3199 rcu_read_unlock();
648fda74 3200 return 0;
1da177e4
LT		 3201}
3202
222f1806 3203static int pktgen_wait_thread_run(struct pktgen_thread *t)
1da177e4 3204{
222f1806 3205 while (thread_is_running(t)) {
1da177e4 3206
720f1de4
PA		 3207 /* note: 't' will still be around even after the unlock/lock
3208 * cycle because pktgen_thread threads are only cleared at
3209 * net exit
3210 */
3211 mutex_unlock(&pktgen_thread_lock);
222f1806 3212 msleep_interruptible(100);
720f1de4 3213 mutex_lock(&pktgen_thread_lock);
1da177e4 3214
222f1806
LC		 3215 if (signal_pending(current))
3216 goto signal;
222f1806 3217 }
222f1806
LC		 3218 return 1;
3219signal:
3220 return 0;
1da177e4
LT		 3221}
3222
4e58a027 3223static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
1da177e4 3224{
cdcdbe0b 3225 struct pktgen_thread *t;
1da177e4 3226 int sig = 1;
222f1806 3227
720f1de4
PA		 3228 /* prevent from racing with rmmod */
3229 if (!try_module_get(THIS_MODULE))
3230 return sig;
3231
6146e6a4 3232 mutex_lock(&pktgen_thread_lock);
cdcdbe0b 3233
4e58a027 3234 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1da177e4 3235 sig = pktgen_wait_thread_run(t);
222f1806
LC		 3236 if (sig == 0)
3237 break;
1da177e4 3238 }
cdcdbe0b
LC		 3239
3240 if (sig == 0)
4e58a027 3241 list_for_each_entry(t, &pn->pktgen_threads, th_list)
1da177e4 3242 t->control |= (T_STOP);
cdcdbe0b 3243
6146e6a4 3244 mutex_unlock(&pktgen_thread_lock);
720f1de4 3245 module_put(THIS_MODULE);
1da177e4
LT		 3246 return sig;
3247}
3248
4e58a027 3249static void pktgen_run_all_threads(struct pktgen_net *pn)
1da177e4 3250{
f9467eae 3251 func_enter();
1da177e4 3252
cda9de0b 3253 pktgen_handle_all_threads(pn, T_RUN);
1da177e4 3254
63adc6fb
SH		 3255 /* Propagate thread->control */
3256 schedule_timeout_interruptible(msecs_to_jiffies(125));
222f1806 3257
4e58a027 3258 pktgen_wait_all_threads_run(pn);
1da177e4
LT		 3259}
3260
4e58a027 3261static void pktgen_reset_all_threads(struct pktgen_net *pn)
eb37b41c 3262{
f9467eae 3263 func_enter();
eb37b41c 3264
cda9de0b 3265 pktgen_handle_all_threads(pn, T_REMDEVALL);
eb37b41c 3266
63adc6fb
SH		 3267 /* Propagate thread->control */
3268 schedule_timeout_interruptible(msecs_to_jiffies(125));
eb37b41c 3269
4e58a027 3270 pktgen_wait_all_threads_run(pn);
eb37b41c
JB		 3271}
3272
1da177e4
LT		 3273static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3274{
fd29cf72 3275 __u64 bps, mbps, pps;
222f1806 3276 char *p = pkt_dev->result;
fd29cf72
SH		 3277 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3278 pkt_dev->started_at);
3279 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3280
03a14ab1 3281 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
fd29cf72
SH		 3282 (unsigned long long)ktime_to_us(elapsed),
3283 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3284 (unsigned long long)ktime_to_us(idle),
222f1806
LC		 3285 (unsigned long long)pkt_dev->sofar,
3286 pkt_dev->cur_pkt_size, nr_frags);
3287
fd29cf72
SH		 3288 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3289 ktime_to_ns(elapsed));
222f1806 3290
769afb3f
NR		 3291 if (pkt_dev->n_imix_entries > 0) {
3292 int i;
3293 struct imix_pkt *entry;
3294
3295 bps = 0;
3296 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
3297 entry = &pkt_dev->imix_entries[i];
3298 bps += entry->size * entry->count_so_far;
3299 }
3300 bps = div64_u64(bps * 8 * NSEC_PER_SEC, ktime_to_ns(elapsed));
3301 } else {
3302 bps = pps * 8 * pkt_dev->cur_pkt_size;
3303 }
222f1806
LC		 3304
3305 mbps = bps;
3306 do_div(mbps, 1000000);
3307 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3308 (unsigned long long)pps,
3309 (unsigned long long)mbps,
3310 (unsigned long long)bps,
3311 (unsigned long long)pkt_dev->errors);
1da177e4 3312}
1da177e4
LT		 3313
3314/* Set stopped-at timer, remove from running list, do counters & statistics */
222f1806 3315static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
1da177e4 3316{
222f1806 3317 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
95ed63f7 3318
222f1806 3319 if (!pkt_dev->running) {
294a0b7f
JP		 3320 pr_warn("interface: %s is already stopped\n",
3321 pkt_dev->odevname);
222f1806
LC		 3322 return -EINVAL;
3323 }
1da177e4 3324
8788370a 3325 pkt_dev->running = 0;
3bda06a3
SH		 3326 kfree_skb(pkt_dev->skb);
3327 pkt_dev->skb = NULL;
398f382c 3328 pkt_dev->stopped_at = ktime_get();
1da177e4 3329
95ed63f7 3330 show_results(pkt_dev, nr_frags);
1da177e4 3331
222f1806 3332 return 0;
1da177e4
LT		 3333}
3334
222f1806 3335static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
1da177e4 3336{
c26a8016 3337 struct pktgen_dev *pkt_dev, *best = NULL;
222f1806 3338
8788370a
JDB		 3339 rcu_read_lock();
3340 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
c26a8016 3341 if (!pkt_dev->running)
222f1806
LC		 3342 continue;
3343 if (best == NULL)
c26a8016 3344 best = pkt_dev;
398f382c 3345 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
c26a8016 3346 best = pkt_dev;
1da177e4 3347 }
8788370a
JDB		 3348 rcu_read_unlock();
3349
222f1806 3350 return best;
1da177e4
LT		 3351}
3352
222f1806
LC		 3353static void pktgen_stop(struct pktgen_thread *t)
3354{
c26a8016 3355 struct pktgen_dev *pkt_dev;
1da177e4 3356
f9467eae 3357 func_enter();
1da177e4 3358
8788370a 3359 rcu_read_lock();
1da177e4 3360
8788370a 3361 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
c26a8016 3362 pktgen_stop_device(pkt_dev);
95ed63f7 3363 }
1da177e4 3364
8788370a 3365 rcu_read_unlock();
1da177e4
LT		 3366}
3367
95ed63f7
AK		 3368/*
3369 * one of our devices needs to be removed - find it
3370 * and remove it
3371 */
3372static void pktgen_rem_one_if(struct pktgen_thread *t)
3373{
c26a8016
LC		 3374 struct list_head *q, *n;
3375 struct pktgen_dev *cur;
95ed63f7 3376
f9467eae 3377 func_enter();
95ed63f7 3378
c26a8016
LC		 3379 list_for_each_safe(q, n, &t->if_list) {
3380 cur = list_entry(q, struct pktgen_dev, list);
95ed63f7 3381
222f1806
LC		 3382 if (!cur->removal_mark)
3383 continue;
95ed63f7 3384
86dc1ad2 3385 kfree_skb(cur->skb);
95ed63f7
AK		 3386 cur->skb = NULL;
3387
3388 pktgen_remove_device(t, cur);
3389
3390 break;
3391 }
95ed63f7
AK		 3392}
3393
222f1806 3394static void pktgen_rem_all_ifs(struct pktgen_thread *t)
1da177e4 3395{
c26a8016
LC		 3396 struct list_head *q, *n;
3397 struct pktgen_dev *cur;
222f1806 3398
f9467eae
JP		 3399 func_enter();
3400
222f1806 3401 /* Remove all devices, free mem */
95ed63f7 3402
c26a8016
LC		 3403 list_for_each_safe(q, n, &t->if_list) {
3404 cur = list_entry(q, struct pktgen_dev, list);
95ed63f7 3405
86dc1ad2 3406 kfree_skb(cur->skb);
95ed63f7
AK		 3407 cur->skb = NULL;
3408
1da177e4
LT		 3409 pktgen_remove_device(t, cur);
3410 }
1da177e4
LT		 3411}
3412
222f1806 3413static void pktgen_rem_thread(struct pktgen_thread *t)
1da177e4 3414{
222f1806 3415 /* Remove from the thread list */
4e58a027 3416 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
1da177e4
LT		 3417}
3418
ef87979c 3419static void pktgen_resched(struct pktgen_dev *pkt_dev)
3791decb 3420{
398f382c 3421 ktime_t idle_start = ktime_get();
ef87979c 3422 schedule();
398f382c 3423 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
ef87979c 3424}
3791decb 3425
ef87979c
SH		 3426static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3427{
398f382c 3428 ktime_t idle_start = ktime_get();
3791decb 3429
63354797 3430 while (refcount_read(&(pkt_dev->skb->users)) != 1) {
ef87979c
SH		 3431 if (signal_pending(current))
3432 break;
3433
3434 if (need_resched())
3435 pktgen_resched(pkt_dev);
3436 else
3437 cpu_relax();
3438 }
398f382c 3439 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3791decb
SH		 3440}
3441
475ac1e4 3442static void pktgen_xmit(struct pktgen_dev *pkt_dev)
1da177e4 3443{
6aa7de05 3444 unsigned int burst = READ_ONCE(pkt_dev->burst);
00829823 3445 struct net_device *odev = pkt_dev->odev;
fd2ea0a7 3446 struct netdev_queue *txq;
62f64aed 3447 struct sk_buff *skb;
1da177e4
LT		 3448 int ret;
3449
ef87979c
SH		 3450 /* If device is offline, then don't send */
3451 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3452 pktgen_stop_device(pkt_dev);
3453 return;
fd2ea0a7
DM		 3454 }
3455
ef87979c
SH		 3456 /* This is max DELAY, this has special meaning of
3457 * "never transmit"
3458 */
3459 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
398f382c 3460 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3791decb 3461 return;
1da177e4 3462 }
222f1806 3463
ef87979c 3464 /* If no skb or clone count exhausted then get new one */
7d7bb1cf
SH		 3465 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3466 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3467 /* build a new pkt */
3468 kfree_skb(pkt_dev->skb);
3469
3470 pkt_dev->skb = fill_packet(odev, pkt_dev);
3471 if (pkt_dev->skb == NULL) {
f9467eae 3472 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
7d7bb1cf
SH		 3473 schedule();
3474 pkt_dev->clone_count--; /* back out increment, OOM */
3475 return;
1da177e4 3476 }
baac8564 3477 pkt_dev->last_pkt_size = pkt_dev->skb->len;
7d7bb1cf 3478 pkt_dev->clone_count = 0; /* reset counter */
1da177e4 3479 }
95ed63f7 3480
ef87979c
SH		 3481 if (pkt_dev->delay && pkt_dev->last_ok)
3482 spin(pkt_dev, pkt_dev->next_tx);
3483
62f64aed
AS		 3484 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3485 skb = pkt_dev->skb;
3486 skb->protocol = eth_type_trans(skb, skb->dev);
63354797 3487 refcount_add(burst, &skb->users);
62f64aed
AS		 3488 local_bh_disable();
3489 do {
3490 ret = netif_receive_skb(skb);
3491 if (ret == NET_RX_DROP)
3492 pkt_dev->errors++;
3493 pkt_dev->sofar++;
3494 pkt_dev->seq_num++;
63354797 3495 if (refcount_read(&skb->users) != burst) {
62f64aed
AS		 3496 /* skb was queued by rps/rfs or taps,
3497 * so cannot reuse this skb
3498 */
63354797 3499 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
62f64aed
AS		 3500 /* get out of the loop and wait
3501 * until skb is consumed
3502 */
62f64aed
AS		 3503 break;
3504 }
3505 /* skb was 'freed' by stack, so clean few
3506 * bits and reuse it
3507 */
2c64605b 3508 skb_reset_redirect(skb);
62f64aed
AS		 3509 } while (--burst > 0);
3510 goto out; /* Skips xmit_mode M_START_XMIT */
0967f244
JF		 3511 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3512 local_bh_disable();
63354797 3513 refcount_inc(&pkt_dev->skb->users);
0967f244
JF		 3514
3515 ret = dev_queue_xmit(pkt_dev->skb);
3516 switch (ret) {
3517 case NET_XMIT_SUCCESS:
3518 pkt_dev->sofar++;
3519 pkt_dev->seq_num++;
3520 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3521 break;
3522 case NET_XMIT_DROP:
3523 case NET_XMIT_CN:
3524 /* These are all valid return codes for a qdisc but
3525 * indicate packets are being dropped or will likely
3526 * be dropped soon.
3527 */
3528 case NETDEV_TX_BUSY:
3529 /* qdisc may call dev_hard_start_xmit directly in cases
3530 * where no queues exist e.g. loopback device, virtual
3531 * devices, etc. In this case we need to handle
3532 * NETDEV_TX_ codes.
3533 */
3534 default:
3535 pkt_dev->errors++;
3536 net_info_ratelimited("%s xmit error: %d\n",
3537 pkt_dev->odevname, ret);
3538 break;
3539 }
3540 goto out;
62f64aed
AS		 3541 }
3542
10c51b56 3543 txq = skb_get_tx_queue(odev, pkt_dev->skb);
fd2ea0a7 3544
0f2eea4b
DB		 3545 local_bh_disable();
3546
3547 HARD_TX_LOCK(odev, txq, smp_processor_id());
5b8db2f5 3548
6f25cd47 3549 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
0835acfe
ED		 3550 pkt_dev->last_ok = 0;
3551 goto unlock;
3552 }
63354797 3553 refcount_add(burst, &pkt_dev->skb->users);
38b2cf29
AS		 3554
3555xmit_more:
3556 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
ef87979c
SH		 3557
3558 switch (ret) {
3559 case NETDEV_TX_OK:
ef87979c
SH		 3560 pkt_dev->last_ok = 1;
3561 pkt_dev->sofar++;
3562 pkt_dev->seq_num++;
baac8564 3563 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
38b2cf29
AS		 3564 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3565 goto xmit_more;
ef87979c 3566 break;
f466dba1
JF		 3567 case NET_XMIT_DROP:
3568 case NET_XMIT_CN:
f466dba1
JF		 3569 /* skb has been consumed */
3570 pkt_dev->errors++;
3571 break;
ef87979c 3572 default: /* Drivers are not supposed to return other values! */
e87cc472
JP		 3573 net_info_ratelimited("%s xmit error: %d\n",
3574 pkt_dev->odevname, ret);
ef87979c 3575 pkt_dev->errors++;
df561f66 3576 fallthrough;
ef87979c
SH		 3577 case NETDEV_TX_BUSY:
3578 /* Retry it next time */
63354797 3579 refcount_dec(&(pkt_dev->skb->users));
ef87979c 3580 pkt_dev->last_ok = 0;
222f1806 3581 }
38b2cf29 3582 if (unlikely(burst))
63354797 3583 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
0835acfe 3584unlock:
0f2eea4b
DB		 3585 HARD_TX_UNLOCK(odev, txq);
3586
62f64aed 3587out:
0f2eea4b 3588 local_bh_enable();
222f1806 3589
1da177e4
LT		 3590 /* If pkt_dev->count is zero, then run forever */
3591 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
ef87979c 3592 pktgen_wait_for_skb(pkt_dev);
222f1806 3593
1da177e4
LT		 3594 /* Done with this */
3595 pktgen_stop_device(pkt_dev);
222f1806 3596 }
222f1806 3597}
1da177e4 3598
4ec93edb 3599/*
1da177e4
LT		 3600 * Main loop of the thread goes here
3601 */
3602
ee74baa7 3603static int pktgen_thread_worker(void *arg)
1da177e4 3604{
ee74baa7 3605 struct pktgen_thread *t = arg;
222f1806 3606 struct pktgen_dev *pkt_dev = NULL;
1da177e4 3607 int cpu = t->cpu;
1da177e4 3608
275b1e88 3609 WARN_ON(smp_processor_id() != cpu);
1da177e4
LT		 3610
3611 init_waitqueue_head(&t->queue);
d3ede327 3612 complete(&t->start_done);
1da177e4 3613
f9467eae 3614 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
1da177e4 3615
83144186
RW		 3616 set_freezable();
3617
ee74baa7
DM		 3618 while (!kthread_should_stop()) {
3619 pkt_dev = next_to_run(t);
1da177e4 3620
ef87979c 3621 if (unlikely(!pkt_dev && t->control == 0)) {
4e58a027 3622 if (t->net->pktgen_exiting)
551eaff1 3623 break;
ef87979c
SH		 3624 wait_event_interruptible_timeout(t->queue,
3625 t->control != 0,
3626 HZ/10);
1b3f720b 3627 try_to_freeze();
ef87979c 3628 continue;
ee74baa7 3629 }
1da177e4 3630
ef87979c 3631 if (likely(pkt_dev)) {
1da177e4
LT		 3632 pktgen_xmit(pkt_dev);
3633
ef87979c
SH		 3634 if (need_resched())
3635 pktgen_resched(pkt_dev);
3636 else
3637 cpu_relax();
3638 }
3639
222f1806 3640 if (t->control & T_STOP) {
1da177e4
LT		 3641 pktgen_stop(t);
3642 t->control &= ~(T_STOP);
3643 }
3644
222f1806 3645 if (t->control & T_RUN) {
1da177e4
LT		 3646 pktgen_run(t);
3647 t->control &= ~(T_RUN);
3648 }
3649
222f1806 3650 if (t->control & T_REMDEVALL) {
1da177e4 3651 pktgen_rem_all_ifs(t);
95ed63f7
AK		 3652 t->control &= ~(T_REMDEVALL);
3653 }
3654
222f1806 3655 if (t->control & T_REMDEV) {
95ed63f7 3656 pktgen_rem_one_if(t);
1da177e4
LT		 3657 t->control &= ~(T_REMDEV);
3658 }
3659
09fe3ef4 3660 try_to_freeze();
222f1806 3661 }
1da177e4 3662
f9467eae 3663 pr_debug("%s stopping all device\n", t->tsk->comm);
222f1806 3664 pktgen_stop(t);
1da177e4 3665
f9467eae 3666 pr_debug("%s removing all device\n", t->tsk->comm);
222f1806 3667 pktgen_rem_all_ifs(t);
1da177e4 3668
f9467eae 3669 pr_debug("%s removing thread\n", t->tsk->comm);
222f1806 3670 pktgen_rem_thread(t);
cdcdbe0b 3671
ee74baa7 3672 return 0;
1da177e4
LT		 3673}
3674
222f1806 3675static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3e984840 3676 const char *ifname, bool exact)
1da177e4 3677{
c26a8016 3678 struct pktgen_dev *p, *pkt_dev = NULL;
3e984840 3679 size_t len = strlen(ifname);
222f1806 3680
8788370a
JDB		 3681 rcu_read_lock();
3682 list_for_each_entry_rcu(p, &t->if_list, list)
3e984840
ED		 3683 if (strncmp(p->odevname, ifname, len) == 0) {
3684 if (p->odevname[len]) {
3685 if (exact || p->odevname[len] != '@')
3686 continue;
3687 }
c26a8016 3688 pkt_dev = p;
222f1806
LC		 3689 break;
3690 }
222f1806 3691
8788370a 3692 rcu_read_unlock();
f9467eae 3693 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
222f1806 3694 return pkt_dev;
1da177e4
LT		 3695}
3696
4ec93edb
YH		 3697/*
3698 * Adds a dev at front of if_list.
1da177e4
LT		 3699 */
3700
222f1806
LC		 3701static int add_dev_to_thread(struct pktgen_thread *t,
3702 struct pktgen_dev *pkt_dev)
1da177e4
LT		 3703{
3704 int rv = 0;
222f1806 3705
8788370a
JDB		 3706 /* This function cannot be called concurrently, as its called
3707 * under pktgen_thread_lock mutex, but it can run from
3708 * userspace on another CPU than the kthread. The if_lock()
3709 * is used here to sync with concurrent instances of
3710 * _rem_dev_from_if_list() invoked via kthread, which is also
3711 * updating the if_list */
222f1806
LC		 3712 if_lock(t);
3713
3714 if (pkt_dev->pg_thread) {
f9467eae 3715 pr_err("ERROR: already assigned to a thread\n");
222f1806
LC		 3716 rv = -EBUSY;
3717 goto out;
3718 }
c26a8016 3719
1da177e4 3720 pkt_dev->running = 0;
8788370a
JDB		 3721 pkt_dev->pg_thread = t;
3722 list_add_rcu(&pkt_dev->list, &t->if_list);
1da177e4 3723
222f1806
LC		 3724out:
3725 if_unlock(t);
3726 return rv;
1da177e4
LT		 3727}
3728
3729/* Called under thread lock */
3730
222f1806 3731static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
1da177e4 3732{
222f1806 3733 struct pktgen_dev *pkt_dev;
39df232f 3734 int err;
3291b9db 3735 int node = cpu_to_node(t->cpu);
222f1806 3736
1da177e4
LT		 3737 /* We don't allow a device to be on several threads */
3738
4e58a027 3739 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
d50a6b56 3740 if (pkt_dev) {
f9467eae 3741 pr_err("ERROR: interface already used\n");
222f1806
LC		 3742 return -EBUSY;
3743 }
d50a6b56 3744
3291b9db 3745 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
d50a6b56
SH		 3746 if (!pkt_dev)
3747 return -ENOMEM;
3748
593f63b0 3749 strcpy(pkt_dev->odevname, ifname);
fd7beced
KC		 3750 pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
3751 sizeof(struct flow_state)),
3291b9db 3752 node);
d50a6b56
SH		 3753 if (pkt_dev->flows == NULL) {
3754 kfree(pkt_dev);
3755 return -ENOMEM;
3756 }
d50a6b56 3757
95ed63f7 3758 pkt_dev->removal_mark = 0;
d50a6b56 3759 pkt_dev->nfrags = 0;
fd29cf72 3760 pkt_dev->delay = pg_delay_d;
d50a6b56
SH		 3761 pkt_dev->count = pg_count_d;
3762 pkt_dev->sofar = 0;
222f1806 3763 pkt_dev->udp_src_min = 9; /* sink port */
d50a6b56
SH		 3764 pkt_dev->udp_src_max = 9;
3765 pkt_dev->udp_dst_min = 9;
3766 pkt_dev->udp_dst_max = 9;
34954ddc
FF		 3767 pkt_dev->vlan_p = 0;
3768 pkt_dev->vlan_cfi = 0;
3769 pkt_dev->vlan_id = 0xffff;
3770 pkt_dev->svlan_p = 0;
3771 pkt_dev->svlan_cfi = 0;
3772 pkt_dev->svlan_id = 0xffff;
38b2cf29 3773 pkt_dev->burst = 1;
98fa15f3 3774 pkt_dev->node = NUMA_NO_NODE;
34954ddc 3775
4e58a027 3776 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
39df232f
SH		 3777 if (err)
3778 goto out1;
d8873315
NH		 3779 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3780 pkt_dev->clone_skb = pg_clone_skb_d;
d50a6b56 3781
4e58a027 3782 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
97a32539 3783 &pktgen_if_proc_ops, pkt_dev);
39df232f 3784 if (!pkt_dev->entry) {
f9467eae 3785 pr_err("cannot create %s/%s procfs entry\n",
d50a6b56 3786 PG_PROC_DIR, ifname);
39df232f
SH		 3787 err = -EINVAL;
3788 goto out2;
d50a6b56 3789 }
a553e4a6
JHS		 3790#ifdef CONFIG_XFRM
3791 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3792 pkt_dev->ipsproto = IPPROTO_ESP;
cf93d47e
FD		 3793
3794 /* xfrm tunnel mode needs additional dst to extract outter
3795 * ip header protocol/ttl/id field, here creat a phony one.
3796 * instead of looking for a valid rt, which definitely hurting
3797 * performance under such circumstance.
3798 */
3799 pkt_dev->dstops.family = AF_INET;
b6ca8bd5
DM		 3800 pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3801 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3802 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3803 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
a553e4a6 3804#endif
d50a6b56
SH		 3805
3806 return add_dev_to_thread(t, pkt_dev);
39df232f
SH		 3807out2:
3808 dev_put(pkt_dev->odev);
3809out1:
a553e4a6
JHS		 3810#ifdef CONFIG_XFRM
3811 free_SAs(pkt_dev);
3812#endif
1d0ebfe7 3813 vfree(pkt_dev->flows);
39df232f
SH		 3814 kfree(pkt_dev);
3815 return err;
1da177e4
LT		 3816}
3817
4e58a027 3818static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
1da177e4 3819{
cdcdbe0b 3820 struct pktgen_thread *t;
d50a6b56 3821 struct proc_dir_entry *pe;
ee74baa7 3822 struct task_struct *p;
222f1806 3823
3291b9db
ED		 3824 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3825 cpu_to_node(cpu));
222f1806 3826 if (!t) {
f9467eae 3827 pr_err("ERROR: out of memory, can't create new thread\n");
222f1806
LC		 3828 return -ENOMEM;
3829 }
3830
9a0b1e8b 3831 mutex_init(&t->if_lock);
1da177e4 3832 t->cpu = cpu;
222f1806 3833
ee74baa7
DM		 3834 INIT_LIST_HEAD(&t->if_list);
3835
4e58a027 3836 list_add_tail(&t->th_list, &pn->pktgen_threads);
d3ede327 3837 init_completion(&t->start_done);
ee74baa7 3838
94dcf29a
ED		 3839 p = kthread_create_on_node(pktgen_thread_worker,
3840 t,
3841 cpu_to_node(cpu),
3842 "kpktgend_%d", cpu);
ee74baa7 3843 if (IS_ERR(p)) {
355db391 3844 pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu);
ee74baa7
DM		 3845 list_del(&t->th_list);
3846 kfree(t);
3847 return PTR_ERR(p);
3848 }
3849 kthread_bind(p, cpu);
3850 t->tsk = p;
3851
4e58a027 3852 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
97a32539 3853 &pktgen_thread_proc_ops, t);
222f1806 3854 if (!pe) {
f9467eae 3855 pr_err("cannot create %s/%s procfs entry\n",
ee74baa7
DM		 3856 PG_PROC_DIR, t->tsk->comm);
3857 kthread_stop(p);
3858 list_del(&t->th_list);
222f1806
LC		 3859 kfree(t);
3860 return -EINVAL;
3861 }
d50a6b56 3862
4e58a027 3863 t->net = pn;
1fbe4b46 3864 get_task_struct(p);
ee74baa7 3865 wake_up_process(p);
d3ede327 3866 wait_for_completion(&t->start_done);
1da177e4
LT		 3867
3868 return 0;
3869}
3870
4ec93edb
YH		 3871/*
3872 * Removes a device from the thread if_list.
1da177e4 3873 */
222f1806
LC		 3874static void _rem_dev_from_if_list(struct pktgen_thread *t,
3875 struct pktgen_dev *pkt_dev)
1da177e4 3876{
c26a8016
LC		 3877 struct list_head *q, *n;
3878 struct pktgen_dev *p;
1da177e4 3879
8788370a 3880 if_lock(t);
c26a8016
LC		 3881 list_for_each_safe(q, n, &t->if_list) {
3882 p = list_entry(q, struct pktgen_dev, list);
3883 if (p == pkt_dev)
8788370a 3884 list_del_rcu(&p->list);
1da177e4 3885 }
8788370a 3886 if_unlock(t);
1da177e4
LT		 3887}
3888
222f1806
LC		 3889static int pktgen_remove_device(struct pktgen_thread *t,
3890 struct pktgen_dev *pkt_dev)
1da177e4 3891{
f9467eae 3892 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
1da177e4 3893
222f1806 3894 if (pkt_dev->running) {
294a0b7f 3895 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
222f1806
LC		 3896 pktgen_stop_device(pkt_dev);
3897 }
3898
3899 /* Dis-associate from the interface */
1da177e4
LT		 3900
3901 if (pkt_dev->odev) {
3902 dev_put(pkt_dev->odev);
222f1806
LC		 3903 pkt_dev->odev = NULL;
3904 }
3905
8788370a
JDB		 3906 /* Remove proc before if_list entry, because add_device uses
3907 * list to determine if interface already exist, avoid race
3908 * with proc_create_data() */
ef87c5d6 3909 proc_remove(pkt_dev->entry);
1da177e4 3910
8788370a
JDB		 3911 /* And update the thread if_list */
3912 _rem_dev_from_if_list(t, pkt_dev);
3913
a553e4a6
JHS		 3914#ifdef CONFIG_XFRM
3915 free_SAs(pkt_dev);
3916#endif
1d0ebfe7 3917 vfree(pkt_dev->flows);
26ad7879
ED		 3918 if (pkt_dev->page)
3919 put_page(pkt_dev->page);
8788370a 3920 kfree_rcu(pkt_dev, rcu);
222f1806 3921 return 0;
1da177e4
LT		 3922}
3923
4e58a027 3924static int __net_init pg_net_init(struct net *net)
1da177e4 3925{
4e58a027 3926 struct pktgen_net *pn = net_generic(net, pg_net_id);
d50a6b56 3927 struct proc_dir_entry *pe;
4e58a027
CW		 3928 int cpu, ret = 0;
3929
3930 pn->net = net;
3931 INIT_LIST_HEAD(&pn->pktgen_threads);
3932 pn->pktgen_exiting = false;
3933 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3934 if (!pn->proc_dir) {
3935 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
d50a6b56 3936 return -ENODEV;
4e58a027 3937 }
97a32539 3938 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops);
222f1806 3939 if (pe == NULL) {
4e58a027 3940 pr_err("cannot create %s procfs entry\n", PGCTRL);
ce14f894 3941 ret = -EINVAL;
4e58a027 3942 goto remove;
222f1806 3943 }
1da177e4 3944
670c02c2 3945 for_each_online_cpu(cpu) {
8024bb24 3946 int err;
1da177e4 3947
4e58a027 3948 err = pktgen_create_thread(cpu, pn);
8024bb24 3949 if (err)
4e58a027 3950 pr_warn("Cannot create thread for cpu %d (%d)\n",
f9467eae 3951 cpu, err);
222f1806 3952 }
8024bb24 3953
4e58a027
CW		 3954 if (list_empty(&pn->pktgen_threads)) {
3955 pr_err("Initialization failed for all threads\n");
ce14f894 3956 ret = -ENODEV;
4e58a027 3957 goto remove_entry;
8024bb24
LC		 3958 }
3959
222f1806 3960 return 0;
ce14f894 3961
4e58a027
CW		 3962remove_entry:
3963 remove_proc_entry(PGCTRL, pn->proc_dir);
3964remove:
ece31ffd 3965 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
ce14f894 3966 return ret;
1da177e4
LT		 3967}
3968
4e58a027 3969static void __net_exit pg_net_exit(struct net *net)
1da177e4 3970{
4e58a027 3971 struct pktgen_net *pn = net_generic(net, pg_net_id);
cdcdbe0b
LC		 3972 struct pktgen_thread *t;
3973 struct list_head *q, *n;
d4b11335 3974 LIST_HEAD(list);
1da177e4 3975
222f1806 3976 /* Stop all interfaces & threads */
4e58a027 3977 pn->pktgen_exiting = true;
1da177e4 3978
c57b5468 3979 mutex_lock(&pktgen_thread_lock);
4e58a027 3980 list_splice_init(&pn->pktgen_threads, &list);
c57b5468
ED		 3981 mutex_unlock(&pktgen_thread_lock);
3982
3983 list_for_each_safe(q, n, &list) {
cdcdbe0b 3984 t = list_entry(q, struct pktgen_thread, th_list);
c57b5468 3985 list_del(&t->th_list);
ee74baa7 3986 kthread_stop(t->tsk);
1fbe4b46 3987 put_task_struct(t->tsk);
ee74baa7 3988 kfree(t);
222f1806 3989 }
1da177e4 3990
4e58a027 3991 remove_proc_entry(PGCTRL, pn->proc_dir);
ece31ffd 3992 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
4e58a027
CW		 3993}
3994
3995static struct pernet_operations pg_net_ops = {
3996 .init = pg_net_init,
3997 .exit = pg_net_exit,
3998 .id = &pg_net_id,
3999 .size = sizeof(struct pktgen_net),
4000};
4001
4002static int __init pg_init(void)
4003{
4004 int ret = 0;
1da177e4 4005
4e58a027
CW		 4006 pr_info("%s", version);
4007 ret = register_pernet_subsys(&pg_net_ops);
4008 if (ret)
4009 return ret;
4010 ret = register_netdevice_notifier(&pktgen_notifier_block);
4011 if (ret)
4012 unregister_pernet_subsys(&pg_net_ops);
4013
4014 return ret;
4015}
4016
4017static void __exit pg_cleanup(void)
4018{
4019 unregister_netdevice_notifier(&pktgen_notifier_block);
4020 unregister_pernet_subsys(&pg_net_ops);
8788370a 4021 /* Don't need rcu_barrier() due to use of kfree_rcu() */
1da177e4
LT		 4022}
4023
1da177e4
LT		 4024module_init(pg_init);
4025module_exit(pg_cleanup);
4026
c3d2f52d 4027MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
1da177e4
LT		 4028MODULE_DESCRIPTION("Packet Generator tool");
4029MODULE_LICENSE("GPL");
c3d2f52d 4030MODULE_VERSION(VERSION);
1da177e4 4031module_param(pg_count_d, int, 0);
c3d2f52d 4032MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
1da177e4 4033module_param(pg_delay_d, int, 0);
c3d2f52d 4034MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
1da177e4 4035module_param(pg_clone_skb_d, int, 0);
c3d2f52d 4036MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
1da177e4 4037module_param(debug, int, 0);
c3d2f52d 4038MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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