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[linux-block.git] / net / core / pktgen.c
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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 */
035f1f2b 413 netdevice_tracker dev_tracker;
593f63b0 414 char odevname[32];
1da177e4 415 struct flow_state *flows;
95c96174
ED		 416 unsigned int cflows; /* Concurrent flows (config) */
417 unsigned int lflow; /* Flow length (config) */
418 unsigned int nflows; /* accumulated flows (stats) */
419 unsigned int curfl; /* current sequenced flow (state)*/
45b270f8
RO		 420
421 u16 queue_map_min;
422 u16 queue_map_max;
9e50e3ac 423 __u32 skb_priority; /* skb priority field */
38b2cf29 424 unsigned int burst; /* number of duplicated packets to burst */
e99b99b4 425 int node; /* Memory node */
45b270f8 426
a553e4a6
JHS		 427#ifdef CONFIG_XFRM
428 __u8 ipsmode; /* IPSEC mode (config) */
429 __u8 ipsproto; /* IPSEC type (config) */
de4aee7d 430 __u32 spi;
b6ca8bd5 431 struct xfrm_dst xdst;
cf93d47e 432 struct dst_ops dstops;
a553e4a6 433#endif
39df232f 434 char result[512];
1da177e4
LT		 435};
436
437struct pktgen_hdr {
252e3346
AV		 438 __be32 pgh_magic;
439 __be32 seq_num;
440 __be32 tv_sec;
441 __be32 tv_usec;
1da177e4
LT		 442};
443
4e58a027 444
c7d03a00 445static unsigned int pg_net_id __read_mostly;
4e58a027
CW		 446
447struct pktgen_net {
448 struct net *net;
449 struct proc_dir_entry *proc_dir;
450 struct list_head pktgen_threads;
451 bool pktgen_exiting;
452};
551eaff1 453
1da177e4 454struct pktgen_thread {
9a0b1e8b 455 struct mutex if_lock; /* for list of devices */
c26a8016 456 struct list_head if_list; /* All device here */
cdcdbe0b 457 struct list_head th_list;
ee74baa7 458 struct task_struct *tsk;
222f1806 459 char result[512];
222f1806 460
63adc6fb
SH		 461 /* Field for thread to receive "posted" events terminate,
462 stop ifs etc. */
222f1806
LC		 463
464 u32 control;
1da177e4
LT		 465 int cpu;
466
222f1806 467 wait_queue_head_t queue;
d3ede327 468 struct completion start_done;
4e58a027 469 struct pktgen_net *net;
1da177e4
LT		 470};
471
472#define REMOVE 1
473#define FIND 0
474
c3d2f52d 475static const char version[] =
f9467eae
JP		 476 "Packet Generator for packet performance testing. "
477 "Version: " VERSION "\n";
1da177e4 478
222f1806
LC		 479static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
480static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
481static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3e984840 482 const char *ifname, bool exact);
1da177e4 483static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
4e58a027
CW		 484static void pktgen_run_all_threads(struct pktgen_net *pn);
485static void pktgen_reset_all_threads(struct pktgen_net *pn);
cda9de0b 486static void pktgen_stop_all_threads(struct pktgen_net *pn);
3bda06a3 487
222f1806 488static void pktgen_stop(struct pktgen_thread *t);
1da177e4 489static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
90149031 490static void fill_imix_distribution(struct pktgen_dev *pkt_dev);
39df232f 491
1da177e4 492/* Module parameters, defaults. */
65c5b786
SH		 493static int pg_count_d __read_mostly = 1000;
494static int pg_delay_d __read_mostly;
495static int pg_clone_skb_d __read_mostly;
496static int debug __read_mostly;
1da177e4 497
222fa076 498static DEFINE_MUTEX(pktgen_thread_lock);
1da177e4 499
1da177e4
LT		 500static struct notifier_block pktgen_notifier_block = {
501 .notifier_call = pktgen_device_event,
502};
503
1da177e4 504/*
4ec93edb 505 * /proc handling functions
1da177e4
LT		 506 *
507 */
508
d50a6b56 509static int pgctrl_show(struct seq_file *seq, void *v)
222f1806 510{
c3d2f52d 511 seq_puts(seq, version);
d50a6b56 512 return 0;
1da177e4
LT		 513}
514
63adc6fb
SH		 515static ssize_t pgctrl_write(struct file *file, const char __user *buf,
516 size_t count, loff_t *ppos)
1da177e4 517{
d50a6b56 518 char data[128];
4e58a027 519 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
1da177e4 520
09455747
MK		 521 if (!capable(CAP_NET_ADMIN))
522 return -EPERM;
1da177e4 523
20b0c718
MK		 524 if (count == 0)
525 return -EINVAL;
526
d50a6b56
SH		 527 if (count > sizeof(data))
528 count = sizeof(data);
1da177e4 529
09455747
MK		 530 if (copy_from_user(data, buf, count))
531 return -EFAULT;
532
20b0c718 533 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
1da177e4 534
222f1806 535 if (!strcmp(data, "stop"))
cda9de0b 536 pktgen_stop_all_threads(pn);
222f1806 537 else if (!strcmp(data, "start"))
4e58a027 538 pktgen_run_all_threads(pn);
eb37b41c 539 else if (!strcmp(data, "reset"))
4e58a027 540 pktgen_reset_all_threads(pn);
222f1806 541 else
40207264 542 return -EINVAL;
1da177e4 543
09455747 544 return count;
1da177e4
LT		 545}
546
d50a6b56
SH		 547static int pgctrl_open(struct inode *inode, struct file *file)
548{
359745d7 549 return single_open(file, pgctrl_show, pde_data(inode));
d50a6b56
SH		 550}
551
97a32539
AD		 552static const struct proc_ops pktgen_proc_ops = {
553 .proc_open = pgctrl_open,
554 .proc_read = seq_read,
555 .proc_lseek = seq_lseek,
556 .proc_write = pgctrl_write,
557 .proc_release = single_release,
d50a6b56
SH		 558};
559
560static int pktgen_if_show(struct seq_file *seq, void *v)
1da177e4 561{
648fda74 562 const struct pktgen_dev *pkt_dev = seq->private;
fd29cf72 563 ktime_t stopped;
99c6d3d2 564 unsigned int i;
fd29cf72 565 u64 idle;
222f1806
LC		 566
567 seq_printf(seq,
568 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
569 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
570 pkt_dev->max_pkt_size);
571
52a62f86
NR		 572 if (pkt_dev->n_imix_entries > 0) {
573 seq_puts(seq, " imix_weights: ");
574 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
575 seq_printf(seq, "%llu,%llu ",
576 pkt_dev->imix_entries[i].size,
577 pkt_dev->imix_entries[i].weight);
578 }
579 seq_puts(seq, "\n");
580 }
581
222f1806 582 seq_printf(seq,
fd29cf72
SH		 583 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
584 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
593f63b0 585 pkt_dev->clone_skb, pkt_dev->odevname);
222f1806
LC		 586
587 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
588 pkt_dev->lflow);
589
45b270f8
RO		 590 seq_printf(seq,
591 " queue_map_min: %u queue_map_max: %u\n",
592 pkt_dev->queue_map_min,
593 pkt_dev->queue_map_max);
594
9e50e3ac
JF		 595 if (pkt_dev->skb_priority)
596 seq_printf(seq, " skb_priority: %u\n",
597 pkt_dev->skb_priority);
598
222f1806 599 if (pkt_dev->flags & F_IPV6) {
222f1806 600 seq_printf(seq,
47a0200d
AD		 601 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
602 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
603 &pkt_dev->in6_saddr,
604 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
605 &pkt_dev->in6_daddr,
606 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
63adc6fb
SH		 607 } else {
608 seq_printf(seq,
609 " dst_min: %s dst_max: %s\n",
610 pkt_dev->dst_min, pkt_dev->dst_max);
222f1806 611 seq_printf(seq,
d079abd1 612 " src_min: %s src_max: %s\n",
63adc6fb
SH		 613 pkt_dev->src_min, pkt_dev->src_max);
614 }
1da177e4 615
222f1806 616 seq_puts(seq, " src_mac: ");
1da177e4 617
e174961c
JB		 618 seq_printf(seq, "%pM ",
619 is_zero_ether_addr(pkt_dev->src_mac) ?
620 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
222f1806 621
97dc48e2 622 seq_puts(seq, "dst_mac: ");
e174961c 623 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
222f1806
LC		 624
625 seq_printf(seq,
63adc6fb
SH		 626 " udp_src_min: %d udp_src_max: %d"
627 " udp_dst_min: %d udp_dst_max: %d\n",
222f1806
LC		 628 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
629 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
630
631 seq_printf(seq,
ca6549af 632 " src_mac_count: %d dst_mac_count: %d\n",
222f1806 633 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
1da177e4 634
ca6549af 635 if (pkt_dev->nr_labels) {
97dc48e2 636 seq_puts(seq, " mpls: ");
e71a4783 637 for (i = 0; i < pkt_dev->nr_labels; i++)
ca6549af
SW		 638 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
639 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
640 }
641
63adc6fb 642 if (pkt_dev->vlan_id != 0xffff)
34954ddc 643 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
63adc6fb
SH		 644 pkt_dev->vlan_id, pkt_dev->vlan_p,
645 pkt_dev->vlan_cfi);
34954ddc 646
63adc6fb 647 if (pkt_dev->svlan_id != 0xffff)
34954ddc 648 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
63adc6fb
SH		 649 pkt_dev->svlan_id, pkt_dev->svlan_p,
650 pkt_dev->svlan_cfi);
34954ddc 651
63adc6fb 652 if (pkt_dev->tos)
1ca7768c 653 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
1ca7768c 654
63adc6fb 655 if (pkt_dev->traffic_class)
1ca7768c 656 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
1ca7768c 657
38b2cf29
AS		 658 if (pkt_dev->burst > 1)
659 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
660
e99b99b4
RO		 661 if (pkt_dev->node >= 0)
662 seq_printf(seq, " node: %d\n", pkt_dev->node);
663
62f64aed
AS		 664 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
665 seq_puts(seq, " xmit_mode: netif_receive\n");
0967f244
JF		 666 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
667 seq_puts(seq, " xmit_mode: xmit_queue\n");
62f64aed 668
97dc48e2 669 seq_puts(seq, " Flags: ");
ca6549af 670
99c6d3d2
DS		 671 for (i = 0; i < NR_PKT_FLAGS; i++) {
672 if (i == F_FLOW_SEQ)
673 if (!pkt_dev->cflows)
674 continue;
afb84b62 675
99c6d3d2
DS		 676 if (pkt_dev->flags & (1 << i))
677 seq_printf(seq, "%s ", pkt_flag_names[i]);
678 else if (i == F_FLOW_SEQ)
679 seq_puts(seq, "FLOW_RND ");
007a531b 680
a553e4a6 681#ifdef CONFIG_XFRM
99c6d3d2 682 if (i == F_IPSEC && pkt_dev->spi)
8101328b 683 seq_printf(seq, "spi:%u", pkt_dev->spi);
a553e4a6 684#endif
99c6d3d2 685 }
e99b99b4 686
222f1806
LC		 687 seq_puts(seq, "\n");
688
fd29cf72 689 /* not really stopped, more like last-running-at */
398f382c 690 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
fd29cf72
SH		 691 idle = pkt_dev->idle_acc;
692 do_div(idle, NSEC_PER_USEC);
1da177e4 693
222f1806 694 seq_printf(seq,
fd29cf72 695 "Current:\n pkts-sofar: %llu errors: %llu\n",
222f1806 696 (unsigned long long)pkt_dev->sofar,
fd29cf72
SH		 697 (unsigned long long)pkt_dev->errors);
698
769afb3f
NR		 699 if (pkt_dev->n_imix_entries > 0) {
700 int i;
701
702 seq_puts(seq, " imix_size_counts: ");
703 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
704 seq_printf(seq, "%llu,%llu ",
705 pkt_dev->imix_entries[i].size,
706 pkt_dev->imix_entries[i].count_so_far);
707 }
708 seq_puts(seq, "\n");
709 }
710
fd29cf72
SH		 711 seq_printf(seq,
712 " started: %lluus stopped: %lluus idle: %lluus\n",
713 (unsigned long long) ktime_to_us(pkt_dev->started_at),
714 (unsigned long long) ktime_to_us(stopped),
715 (unsigned long long) idle);
1da177e4 716
222f1806
LC		 717 seq_printf(seq,
718 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
d50a6b56
SH		 719 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
720 pkt_dev->cur_src_mac_offset);
1da177e4 721
222f1806 722 if (pkt_dev->flags & F_IPV6) {
47a0200d
AD		 723 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
724 &pkt_dev->cur_in6_saddr,
725 &pkt_dev->cur_in6_daddr);
222f1806 726 } else
0373a946
AW		 727 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
728 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
1da177e4 729
222f1806 730 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
d50a6b56 731 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
1da177e4 732
45b270f8
RO		 733 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
734
222f1806 735 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
1da177e4
LT		 736
737 if (pkt_dev->result[0])
222f1806 738 seq_printf(seq, "Result: %s\n", pkt_dev->result);
1da177e4 739 else
97dc48e2 740 seq_puts(seq, "Result: Idle\n");
1da177e4 741
d50a6b56 742 return 0;
1da177e4
LT		 743}
744
ca6549af 745
63adc6fb
SH		 746static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
747 __u32 *num)
ca6549af
SW		 748{
749 int i = 0;
750 *num = 0;
751
e71a4783 752 for (; i < maxlen; i++) {
82fd5b5d 753 int value;
ca6549af
SW		 754 char c;
755 *num <<= 4;
756 if (get_user(c, &user_buffer[i]))
757 return -EFAULT;
82fd5b5d
AS		 758 value = hex_to_bin(c);
759 if (value >= 0)
760 *num |= value;
ca6549af
SW		 761 else
762 break;
763 }
764 return i;
765}
766
222f1806
LC		 767static int count_trail_chars(const char __user * user_buffer,
768 unsigned int maxlen)
1da177e4
LT		 769{
770 int i;
771
772 for (i = 0; i < maxlen; i++) {
222f1806
LC		 773 char c;
774 if (get_user(c, &user_buffer[i]))
775 return -EFAULT;
776 switch (c) {
1da177e4
LT		 777 case '\"':
778 case '\n':
779 case '\r':
780 case '\t':
781 case ' ':
782 case '=':
783 break;
784 default:
785 goto done;
3ff50b79 786 }
1da177e4
LT		 787 }
788done:
789 return i;
790}
791
bf0813bd
PG		 792static long num_arg(const char __user *user_buffer, unsigned long maxlen,
793 unsigned long *num)
1da177e4 794{
d6182223 795 int i;
1da177e4 796 *num = 0;
222f1806 797
d6182223 798 for (i = 0; i < maxlen; i++) {
222f1806
LC		 799 char c;
800 if (get_user(c, &user_buffer[i]))
801 return -EFAULT;
802 if ((c >= '0') && (c <= '9')) {
1da177e4 803 *num *= 10;
222f1806 804 *num += c - '0';
1da177e4
LT		 805 } else
806 break;
807 }
808 return i;
809}
810
222f1806 811static int strn_len(const char __user * user_buffer, unsigned int maxlen)
1da177e4 812{
d6182223 813 int i;
1da177e4 814
d6182223 815 for (i = 0; i < maxlen; i++) {
222f1806
LC		 816 char c;
817 if (get_user(c, &user_buffer[i]))
818 return -EFAULT;
819 switch (c) {
1da177e4
LT		 820 case '\"':
821 case '\n':
822 case '\r':
823 case '\t':
824 case ' ':
825 goto done_str;
1da177e4
LT		 826 default:
827 break;
3ff50b79 828 }
1da177e4
LT		 829 }
830done_str:
1da177e4
LT		 831 return i;
832}
833
52a62f86
NR		 834/* Parses imix entries from user buffer.
835 * The user buffer should consist of imix entries separated by spaces
836 * where each entry consists of size and weight delimited by commas.
837 * "size1,weight_1 size2,weight_2 ... size_n,weight_n" for example.
838 */
839static ssize_t get_imix_entries(const char __user *buffer,
840 struct pktgen_dev *pkt_dev)
841{
842 const int max_digits = 10;
843 int i = 0;
844 long len;
845 char c;
846
847 pkt_dev->n_imix_entries = 0;
848
849 do {
850 unsigned long weight;
851 unsigned long size;
852
853 len = num_arg(&buffer[i], max_digits, &size);
854 if (len < 0)
855 return len;
856 i += len;
857 if (get_user(c, &buffer[i]))
858 return -EFAULT;
859 /* Check for comma between size_i and weight_i */
860 if (c != ',')
861 return -EINVAL;
862 i++;
863
864 if (size < 14 + 20 + 8)
865 size = 14 + 20 + 8;
866
867 len = num_arg(&buffer[i], max_digits, &weight);
868 if (len < 0)
869 return len;
870 if (weight <= 0)
871 return -EINVAL;
872
873 pkt_dev->imix_entries[pkt_dev->n_imix_entries].size = size;
874 pkt_dev->imix_entries[pkt_dev->n_imix_entries].weight = weight;
875
876 i += len;
877 if (get_user(c, &buffer[i]))
878 return -EFAULT;
879
880 i++;
881 pkt_dev->n_imix_entries++;
882
883 if (pkt_dev->n_imix_entries > MAX_IMIX_ENTRIES)
884 return -E2BIG;
885 } while (c == ' ');
886
887 return i;
888}
889
ca6549af
SW		 890static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
891{
95c96174 892 unsigned int n = 0;
ca6549af
SW		 893 char c;
894 ssize_t i = 0;
895 int len;
896
897 pkt_dev->nr_labels = 0;
898 do {
899 __u32 tmp;
1ca7768c 900 len = hex32_arg(&buffer[i], 8, &tmp);
ca6549af
SW		 901 if (len <= 0)
902 return len;
903 pkt_dev->labels[n] = htonl(tmp);
904 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
905 pkt_dev->flags |= F_MPLS_RND;
906 i += len;
907 if (get_user(c, &buffer[i]))
908 return -EFAULT;
909 i++;
910 n++;
911 if (n >= MAX_MPLS_LABELS)
912 return -E2BIG;
e71a4783 913 } while (c == ',');
ca6549af
SW		 914
915 pkt_dev->nr_labels = n;
916 return i;
917}
918
52e12d5d
DS		 919static __u32 pktgen_read_flag(const char *f, bool *disable)
920{
921 __u32 i;
922
923 if (f[0] == '!') {
924 *disable = true;
925 f++;
926 }
927
928 for (i = 0; i < NR_PKT_FLAGS; i++) {
929 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
930 continue;
931
932 /* allow only disabling ipv6 flag */
933 if (!*disable && i == IPV6_SHIFT)
934 continue;
935
936 if (strcmp(f, pkt_flag_names[i]) == 0)
937 return 1 << i;
938 }
939
940 if (strcmp(f, "FLOW_RND") == 0) {
941 *disable = !*disable;
942 return F_FLOW_SEQ;
943 }
944
945 return 0;
946}
947
222f1806
LC		 948static ssize_t pktgen_if_write(struct file *file,
949 const char __user * user_buffer, size_t count,
950 loff_t * offset)
1da177e4 951{
8a994a71 952 struct seq_file *seq = file->private_data;
222f1806 953 struct pktgen_dev *pkt_dev = seq->private;
d6182223 954 int i, max, len;
1da177e4
LT		 955 char name[16], valstr[32];
956 unsigned long value = 0;
222f1806
LC		 957 char *pg_result = NULL;
958 int tmp = 0;
1da177e4 959 char buf[128];
222f1806
LC		 960
961 pg_result = &(pkt_dev->result[0]);
962
1da177e4 963 if (count < 1) {
294a0b7f 964 pr_warn("wrong command format\n");
1da177e4
LT		 965 return -EINVAL;
966 }
222f1806 967
d6182223
PG		 968 max = count;
969 tmp = count_trail_chars(user_buffer, max);
222f1806 970 if (tmp < 0) {
294a0b7f 971 pr_warn("illegal format\n");
222f1806 972 return tmp;
1da177e4 973 }
d6182223 974 i = tmp;
222f1806 975
1da177e4
LT		 976 /* Read variable name */
977
978 len = strn_len(&user_buffer[i], sizeof(name) - 1);
63adc6fb 979 if (len < 0)
222f1806 980 return len;
63adc6fb 981
1da177e4 982 memset(name, 0, sizeof(name));
222f1806 983 if (copy_from_user(name, &user_buffer[i], len))
1da177e4
LT		 984 return -EFAULT;
985 i += len;
222f1806
LC		 986
987 max = count - i;
1da177e4 988 len = count_trail_chars(&user_buffer[i], max);
222f1806
LC		 989 if (len < 0)
990 return len;
991
1da177e4
LT		 992 i += len;
993
994 if (debug) {
a870a02c
AB		 995 size_t copy = min_t(size_t, count + 1, 1024);
996 char *tp = strndup_user(user_buffer, copy);
997
998 if (IS_ERR(tp))
999 return PTR_ERR(tp);
1000
1001 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
29d1df72 1002 kfree(tp);
222f1806 1003 }
1da177e4
LT		 1004
1005 if (!strcmp(name, "min_pkt_size")) {
1006 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1007 if (len < 0)
222f1806 1008 return len;
63adc6fb 1009
1da177e4 1010 i += len;
222f1806
LC		 1011 if (value < 14 + 20 + 8)
1012 value = 14 + 20 + 8;
1013 if (value != pkt_dev->min_pkt_size) {
1014 pkt_dev->min_pkt_size = value;
1015 pkt_dev->cur_pkt_size = value;
1016 }
32be425b 1017 sprintf(pg_result, "OK: min_pkt_size=%d",
222f1806 1018 pkt_dev->min_pkt_size);
1da177e4
LT		 1019 return count;
1020 }
1021
222f1806 1022 if (!strcmp(name, "max_pkt_size")) {
1da177e4 1023 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1024 if (len < 0)
222f1806 1025 return len;
63adc6fb 1026
1da177e4 1027 i += len;
222f1806
LC		 1028 if (value < 14 + 20 + 8)
1029 value = 14 + 20 + 8;
1030 if (value != pkt_dev->max_pkt_size) {
1031 pkt_dev->max_pkt_size = value;
1032 pkt_dev->cur_pkt_size = value;
1033 }
32be425b 1034 sprintf(pg_result, "OK: max_pkt_size=%d",
222f1806 1035 pkt_dev->max_pkt_size);
1da177e4
LT		 1036 return count;
1037 }
1038
222f1806 1039 /* Shortcut for min = max */
1da177e4
LT		 1040
1041 if (!strcmp(name, "pkt_size")) {
1042 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1043 if (len < 0)
222f1806 1044 return len;
63adc6fb 1045
1da177e4 1046 i += len;
222f1806
LC		 1047 if (value < 14 + 20 + 8)
1048 value = 14 + 20 + 8;
1049 if (value != pkt_dev->min_pkt_size) {
1050 pkt_dev->min_pkt_size = value;
1051 pkt_dev->max_pkt_size = value;
1052 pkt_dev->cur_pkt_size = value;
1053 }
32be425b 1054 sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size);
1da177e4
LT		 1055 return count;
1056 }
1057
52a62f86
NR		 1058 if (!strcmp(name, "imix_weights")) {
1059 if (pkt_dev->clone_skb > 0)
1060 return -EINVAL;
1061
1062 len = get_imix_entries(&user_buffer[i], pkt_dev);
1063 if (len < 0)
1064 return len;
1065
90149031
NR		 1066 fill_imix_distribution(pkt_dev);
1067
52a62f86
NR		 1068 i += len;
1069 return count;
1070 }
1071
222f1806 1072 if (!strcmp(name, "debug")) {
1da177e4 1073 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1074 if (len < 0)
222f1806 1075 return len;
63adc6fb 1076
1da177e4 1077 i += len;
222f1806 1078 debug = value;
1da177e4
LT		 1079 sprintf(pg_result, "OK: debug=%u", debug);
1080 return count;
1081 }
1082
222f1806 1083 if (!strcmp(name, "frags")) {
1da177e4 1084 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1085 if (len < 0)
222f1806 1086 return len;
63adc6fb 1087
1da177e4
LT		 1088 i += len;
1089 pkt_dev->nfrags = value;
32be425b 1090 sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags);
1da177e4
LT		 1091 return count;
1092 }
1093 if (!strcmp(name, "delay")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1095 if (len < 0)
222f1806 1096 return len;
63adc6fb 1097
1da177e4 1098 i += len;
fd29cf72
SH		 1099 if (value == 0x7FFFFFFF)
1100 pkt_dev->delay = ULLONG_MAX;
1101 else
9240d715 1102 pkt_dev->delay = (u64)value;
fd29cf72
SH		 1103
1104 sprintf(pg_result, "OK: delay=%llu",
1105 (unsigned long long) pkt_dev->delay);
1da177e4
LT		 1106 return count;
1107 }
43d28b65
DT		 1108 if (!strcmp(name, "rate")) {
1109 len = num_arg(&user_buffer[i], 10, &value);
1110 if (len < 0)
1111 return len;
1112
1113 i += len;
1114 if (!value)
1115 return len;
1116 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1117 if (debug)
f9467eae 1118 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
43d28b65
DT		 1119
1120 sprintf(pg_result, "OK: rate=%lu", value);
1121 return count;
1122 }
1123 if (!strcmp(name, "ratep")) {
1124 len = num_arg(&user_buffer[i], 10, &value);
1125 if (len < 0)
1126 return len;
1127
1128 i += len;
1129 if (!value)
1130 return len;
1131 pkt_dev->delay = NSEC_PER_SEC/value;
1132 if (debug)
f9467eae 1133 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
43d28b65
DT		 1134
1135 sprintf(pg_result, "OK: rate=%lu", value);
1136 return count;
1137 }
222f1806 1138 if (!strcmp(name, "udp_src_min")) {
1da177e4 1139 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1140 if (len < 0)
222f1806 1141 return len;
63adc6fb 1142
1da177e4 1143 i += len;
222f1806
LC		 1144 if (value != pkt_dev->udp_src_min) {
1145 pkt_dev->udp_src_min = value;
1146 pkt_dev->cur_udp_src = value;
1147 }
1da177e4
LT		 1148 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1149 return count;
1150 }
222f1806 1151 if (!strcmp(name, "udp_dst_min")) {
1da177e4 1152 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1153 if (len < 0)
222f1806 1154 return len;
63adc6fb 1155
1da177e4 1156 i += len;
222f1806
LC		 1157 if (value != pkt_dev->udp_dst_min) {
1158 pkt_dev->udp_dst_min = value;
1159 pkt_dev->cur_udp_dst = value;
1160 }
1da177e4
LT		 1161 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1162 return count;
1163 }
222f1806 1164 if (!strcmp(name, "udp_src_max")) {
1da177e4 1165 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1166 if (len < 0)
222f1806 1167 return len;
63adc6fb 1168
1da177e4 1169 i += len;
222f1806
LC		 1170 if (value != pkt_dev->udp_src_max) {
1171 pkt_dev->udp_src_max = value;
1172 pkt_dev->cur_udp_src = value;
1173 }
1da177e4
LT		 1174 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1175 return count;
1176 }
222f1806 1177 if (!strcmp(name, "udp_dst_max")) {
1da177e4 1178 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1179 if (len < 0)
222f1806 1180 return len;
63adc6fb 1181
1da177e4 1182 i += len;
222f1806
LC		 1183 if (value != pkt_dev->udp_dst_max) {
1184 pkt_dev->udp_dst_max = value;
1185 pkt_dev->cur_udp_dst = value;
1186 }
1da177e4
LT		 1187 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1188 return count;
1189 }
1190 if (!strcmp(name, "clone_skb")) {
1191 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1192 if (len < 0)
222f1806 1193 return len;
52a62f86
NR		 1194 /* clone_skb is not supported for netif_receive xmit_mode and
1195 * IMIX mode.
1196 */
d8873315 1197 if ((value > 0) &&
62f64aed
AS		 1198 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1199 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
d8873315 1200 return -ENOTSUPP;
52a62f86
NR		 1201 if (value > 0 && pkt_dev->n_imix_entries > 0)
1202 return -EINVAL;
1203
1da177e4 1204 i += len;
222f1806
LC		 1205 pkt_dev->clone_skb = value;
1206
1da177e4
LT		 1207 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1208 return count;
1209 }
1210 if (!strcmp(name, "count")) {
1211 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1212 if (len < 0)
222f1806 1213 return len;
63adc6fb 1214
1da177e4
LT		 1215 i += len;
1216 pkt_dev->count = value;
1217 sprintf(pg_result, "OK: count=%llu",
222f1806 1218 (unsigned long long)pkt_dev->count);
1da177e4
LT		 1219 return count;
1220 }
1221 if (!strcmp(name, "src_mac_count")) {
1222 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1223 if (len < 0)
222f1806 1224 return len;
63adc6fb 1225
1da177e4
LT		 1226 i += len;
1227 if (pkt_dev->src_mac_count != value) {
222f1806
LC		 1228 pkt_dev->src_mac_count = value;
1229 pkt_dev->cur_src_mac_offset = 0;
1230 }
1231 sprintf(pg_result, "OK: src_mac_count=%d",
1232 pkt_dev->src_mac_count);
1da177e4
LT		 1233 return count;
1234 }
1235 if (!strcmp(name, "dst_mac_count")) {
1236 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1237 if (len < 0)
222f1806 1238 return len;
63adc6fb 1239
1da177e4
LT		 1240 i += len;
1241 if (pkt_dev->dst_mac_count != value) {
222f1806
LC		 1242 pkt_dev->dst_mac_count = value;
1243 pkt_dev->cur_dst_mac_offset = 0;
1244 }
1245 sprintf(pg_result, "OK: dst_mac_count=%d",
1246 pkt_dev->dst_mac_count);
1da177e4
LT		 1247 return count;
1248 }
38b2cf29
AS		 1249 if (!strcmp(name, "burst")) {
1250 len = num_arg(&user_buffer[i], 10, &value);
1251 if (len < 0)
1252 return len;
1253
1254 i += len;
0967f244
JF		 1255 if ((value > 1) &&
1256 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1257 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1258 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
52d6c8c6 1259 return -ENOTSUPP;
38b2cf29 1260 pkt_dev->burst = value < 1 ? 1 : value;
32be425b 1261 sprintf(pg_result, "OK: burst=%u", pkt_dev->burst);
38b2cf29
AS		 1262 return count;
1263 }
e99b99b4
RO		 1264 if (!strcmp(name, "node")) {
1265 len = num_arg(&user_buffer[i], 10, &value);
1266 if (len < 0)
1267 return len;
1268
1269 i += len;
1270
1271 if (node_possible(value)) {
1272 pkt_dev->node = value;
1273 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
26ad7879
ED		 1274 if (pkt_dev->page) {
1275 put_page(pkt_dev->page);
1276 pkt_dev->page = NULL;
1277 }
e99b99b4
RO		 1278 }
1279 else
1280 sprintf(pg_result, "ERROR: node not possible");
1281 return count;
1282 }
62f64aed
AS		 1283 if (!strcmp(name, "xmit_mode")) {
1284 char f[32];
1285
1286 memset(f, 0, 32);
1287 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1288 if (len < 0)
1289 return len;
1290
1291 if (copy_from_user(f, &user_buffer[i], len))
1292 return -EFAULT;
1293 i += len;
1294
1295 if (strcmp(f, "start_xmit") == 0) {
1296 pkt_dev->xmit_mode = M_START_XMIT;
1297 } else if (strcmp(f, "netif_receive") == 0) {
1298 /* clone_skb set earlier, not supported in this mode */
1299 if (pkt_dev->clone_skb > 0)
1300 return -ENOTSUPP;
1301
1302 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
9eea9222
AS		 1303
1304 /* make sure new packet is allocated every time
1305 * pktgen_xmit() is called
1306 */
1307 pkt_dev->last_ok = 1;
0967f244
JF		 1308 } else if (strcmp(f, "queue_xmit") == 0) {
1309 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1310 pkt_dev->last_ok = 1;
62f64aed
AS		 1311 } else {
1312 sprintf(pg_result,
1313 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1314 f, "start_xmit, netif_receive\n");
1315 return count;
1316 }
1317 sprintf(pg_result, "OK: xmit_mode=%s", f);
1318 return count;
1319 }
1da177e4 1320 if (!strcmp(name, "flag")) {
52e12d5d 1321 __u32 flag;
222f1806 1322 char f[32];
52e12d5d
DS		 1323 bool disable = false;
1324
222f1806 1325 memset(f, 0, 32);
1da177e4 1326 len = strn_len(&user_buffer[i], sizeof(f) - 1);
63adc6fb 1327 if (len < 0)
222f1806 1328 return len;
63adc6fb 1329
1da177e4
LT		 1330 if (copy_from_user(f, &user_buffer[i], len))
1331 return -EFAULT;
1332 i += len;
222f1806 1333
52e12d5d 1334 flag = pktgen_read_flag(f, &disable);
222f1806 1335
52e12d5d
DS		 1336 if (flag) {
1337 if (disable)
1338 pkt_dev->flags &= ~flag;
1339 else
1340 pkt_dev->flags |= flag;
1341 } else {
222f1806
LC		 1342 sprintf(pg_result,
1343 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1344 f,
1ca7768c 1345 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
72f8e06f
MK		 1346 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1347 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1348 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
afb84b62 1349 "NO_TIMESTAMP, "
72f8e06f
MK		 1350#ifdef CONFIG_XFRM
1351 "IPSEC, "
1352#endif
1353 "NODE_ALLOC\n");
222f1806
LC		 1354 return count;
1355 }
1da177e4
LT		 1356 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1357 return count;
1358 }
1359 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1360 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
63adc6fb 1361 if (len < 0)
222f1806 1362 return len;
1da177e4 1363
222f1806 1364 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1365 return -EFAULT;
222f1806
LC		 1366 buf[len] = 0;
1367 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1368 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
f15f084f 1369 strcpy(pkt_dev->dst_min, buf);
222f1806
LC		 1370 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1371 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1372 }
1373 if (debug)
f342cda7 1374 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
222f1806 1375 i += len;
1da177e4
LT		 1376 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1377 return count;
1378 }
1379 if (!strcmp(name, "dst_max")) {
1380 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
63adc6fb 1381 if (len < 0)
222f1806 1382 return len;
63adc6fb 1383
222f1806 1384 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1385 return -EFAULT;
222f1806
LC		 1386 buf[len] = 0;
1387 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1388 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
f15f084f 1389 strcpy(pkt_dev->dst_max, buf);
222f1806
LC		 1390 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1391 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1392 }
1393 if (debug)
f342cda7 1394 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1da177e4
LT		 1395 i += len;
1396 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1397 return count;
1398 }
1399 if (!strcmp(name, "dst6")) {
1400 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1401 if (len < 0)
1402 return len;
1da177e4
LT		 1403
1404 pkt_dev->flags |= F_IPV6;
1405
222f1806 1406 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1407 return -EFAULT;
222f1806 1408 buf[len] = 0;
1da177e4 1409
c468fb13 1410 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
47a0200d 1411 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1da177e4 1412
4e3fd7a0 1413 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1da177e4 1414
222f1806 1415 if (debug)
f342cda7 1416 pr_debug("dst6 set to: %s\n", buf);
1da177e4 1417
222f1806 1418 i += len;
1da177e4
LT		 1419 sprintf(pg_result, "OK: dst6=%s", buf);
1420 return count;
1421 }
1422 if (!strcmp(name, "dst6_min")) {
1423 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1424 if (len < 0)
1425 return len;
1da177e4
LT		 1426
1427 pkt_dev->flags |= F_IPV6;
1428
222f1806 1429 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1430 return -EFAULT;
222f1806 1431 buf[len] = 0;
1da177e4 1432
c468fb13 1433 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
47a0200d 1434 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1da177e4 1435
4e3fd7a0 1436 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
222f1806 1437 if (debug)
f342cda7 1438 pr_debug("dst6_min set to: %s\n", buf);
1da177e4 1439
222f1806 1440 i += len;
1da177e4
LT		 1441 sprintf(pg_result, "OK: dst6_min=%s", buf);
1442 return count;
1443 }
1444 if (!strcmp(name, "dst6_max")) {
1445 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1446 if (len < 0)
1447 return len;
1da177e4
LT		 1448
1449 pkt_dev->flags |= F_IPV6;
1450
222f1806 1451 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1452 return -EFAULT;
222f1806 1453 buf[len] = 0;
1da177e4 1454
c468fb13 1455 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
47a0200d 1456 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1da177e4 1457
222f1806 1458 if (debug)
f342cda7 1459 pr_debug("dst6_max set to: %s\n", buf);
1da177e4 1460
222f1806 1461 i += len;
1da177e4
LT		 1462 sprintf(pg_result, "OK: dst6_max=%s", buf);
1463 return count;
1464 }
1465 if (!strcmp(name, "src6")) {
1466 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
222f1806
LC		 1467 if (len < 0)
1468 return len;
1da177e4
LT		 1469
1470 pkt_dev->flags |= F_IPV6;
1471
222f1806 1472 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1473 return -EFAULT;
222f1806 1474 buf[len] = 0;
1da177e4 1475
c468fb13 1476 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
47a0200d 1477 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1da177e4 1478
4e3fd7a0 1479 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1da177e4 1480
222f1806 1481 if (debug)
f342cda7 1482 pr_debug("src6 set to: %s\n", buf);
222f1806
LC		 1483
1484 i += len;
1da177e4
LT		 1485 sprintf(pg_result, "OK: src6=%s", buf);
1486 return count;
1487 }
1488 if (!strcmp(name, "src_min")) {
1489 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
63adc6fb 1490 if (len < 0)
222f1806 1491 return len;
63adc6fb 1492
222f1806 1493 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1494 return -EFAULT;
222f1806
LC		 1495 buf[len] = 0;
1496 if (strcmp(buf, pkt_dev->src_min) != 0) {
1497 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
f15f084f 1498 strcpy(pkt_dev->src_min, buf);
222f1806
LC		 1499 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1500 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1501 }
1502 if (debug)
f342cda7 1503 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1da177e4
LT		 1504 i += len;
1505 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1506 return count;
1507 }
1508 if (!strcmp(name, "src_max")) {
1509 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
63adc6fb 1510 if (len < 0)
222f1806 1511 return len;
63adc6fb 1512
222f1806 1513 if (copy_from_user(buf, &user_buffer[i], len))
1da177e4 1514 return -EFAULT;
222f1806
LC		 1515 buf[len] = 0;
1516 if (strcmp(buf, pkt_dev->src_max) != 0) {
1517 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
f15f084f 1518 strcpy(pkt_dev->src_max, buf);
222f1806
LC		 1519 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1520 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1521 }
1522 if (debug)
f342cda7 1523 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1da177e4
LT		 1524 i += len;
1525 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1526 return count;
1527 }
1528 if (!strcmp(name, "dst_mac")) {
1da177e4 1529 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
63adc6fb 1530 if (len < 0)
222f1806 1531 return len;
63adc6fb 1532
1da177e4 1533 memset(valstr, 0, sizeof(valstr));
222f1806 1534 if (copy_from_user(valstr, &user_buffer[i], len))
1da177e4 1535 return -EFAULT;
1da177e4 1536
4940fc88
AD		 1537 if (!mac_pton(valstr, pkt_dev->dst_mac))
1538 return -EINVAL;
1da177e4 1539 /* Set up Dest MAC */
9ea08b12 1540 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
222f1806 1541
4940fc88 1542 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1da177e4
LT		 1543 return count;
1544 }
1545 if (!strcmp(name, "src_mac")) {
1da177e4 1546 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
63adc6fb 1547 if (len < 0)
222f1806 1548 return len;
63adc6fb 1549
1da177e4 1550 memset(valstr, 0, sizeof(valstr));
222f1806 1551 if (copy_from_user(valstr, &user_buffer[i], len))
1da177e4 1552 return -EFAULT;
1da177e4 1553
4940fc88
AD		 1554 if (!mac_pton(valstr, pkt_dev->src_mac))
1555 return -EINVAL;
ce5d0b47 1556 /* Set up Src MAC */
9ea08b12 1557 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
ce5d0b47 1558
4940fc88 1559 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1da177e4
LT		 1560 return count;
1561 }
1562
222f1806
LC		 1563 if (!strcmp(name, "clear_counters")) {
1564 pktgen_clear_counters(pkt_dev);
1565 sprintf(pg_result, "OK: Clearing counters.\n");
1566 return count;
1567 }
1da177e4
LT		 1568
1569 if (!strcmp(name, "flows")) {
1570 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1571 if (len < 0)
222f1806 1572 return len;
63adc6fb 1573
1da177e4
LT		 1574 i += len;
1575 if (value > MAX_CFLOWS)
1576 value = MAX_CFLOWS;
1577
1578 pkt_dev->cflows = value;
1579 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1580 return count;
1581 }
6bae9190 1582#ifdef CONFIG_XFRM
de4aee7d
FD		 1583 if (!strcmp(name, "spi")) {
1584 len = num_arg(&user_buffer[i], 10, &value);
1585 if (len < 0)
1586 return len;
1587
1588 i += len;
1589 pkt_dev->spi = value;
1590 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1591 return count;
1592 }
6bae9190 1593#endif
1da177e4
LT		 1594 if (!strcmp(name, "flowlen")) {
1595 len = num_arg(&user_buffer[i], 10, &value);
63adc6fb 1596 if (len < 0)
222f1806 1597 return len;
63adc6fb 1598
1da177e4
LT		 1599 i += len;
1600 pkt_dev->lflow = value;
1601 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1602 return count;
1603 }
222f1806 1604
45b270f8
RO		 1605 if (!strcmp(name, "queue_map_min")) {
1606 len = num_arg(&user_buffer[i], 5, &value);
63adc6fb 1607 if (len < 0)
45b270f8 1608 return len;
63adc6fb 1609
45b270f8
RO		 1610 i += len;
1611 pkt_dev->queue_map_min = value;
1612 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1613 return count;
1614 }
1615
1616 if (!strcmp(name, "queue_map_max")) {
1617 len = num_arg(&user_buffer[i], 5, &value);
63adc6fb 1618 if (len < 0)
45b270f8 1619 return len;
63adc6fb 1620
45b270f8
RO		 1621 i += len;
1622 pkt_dev->queue_map_max = value;
1623 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1624 return count;
1625 }
1626
ca6549af 1627 if (!strcmp(name, "mpls")) {
95c96174 1628 unsigned int n, cnt;
cfcabdcc 1629
ca6549af 1630 len = get_labels(&user_buffer[i], pkt_dev);
cfcabdcc
SH		 1631 if (len < 0)
1632 return len;
ca6549af 1633 i += len;
cfcabdcc 1634 cnt = sprintf(pg_result, "OK: mpls=");
e71a4783 1635 for (n = 0; n < pkt_dev->nr_labels; n++)
cfcabdcc
SH		 1636 cnt += sprintf(pg_result + cnt,
1637 "%08x%s", ntohl(pkt_dev->labels[n]),
1638 n == pkt_dev->nr_labels-1 ? "" : ",");
34954ddc
FF		 1639
1640 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1641 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1642 pkt_dev->svlan_id = 0xffff;
1643
1644 if (debug)
f342cda7 1645 pr_debug("VLAN/SVLAN auto turned off\n");
34954ddc
FF		 1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "vlan_id")) {
1651 len = num_arg(&user_buffer[i], 4, &value);
63adc6fb 1652 if (len < 0)
34954ddc 1653 return len;
63adc6fb 1654
34954ddc
FF		 1655 i += len;
1656 if (value <= 4095) {
1657 pkt_dev->vlan_id = value; /* turn on VLAN */
1658
1659 if (debug)
f342cda7 1660 pr_debug("VLAN turned on\n");
34954ddc
FF		 1661
1662 if (debug && pkt_dev->nr_labels)
f342cda7 1663 pr_debug("MPLS auto turned off\n");
34954ddc
FF		 1664
1665 pkt_dev->nr_labels = 0; /* turn off MPLS */
1666 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1667 } else {
1668 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1669 pkt_dev->svlan_id = 0xffff;
1670
1671 if (debug)
f342cda7 1672 pr_debug("VLAN/SVLAN turned off\n");
34954ddc
FF		 1673 }
1674 return count;
1675 }
1676
1677 if (!strcmp(name, "vlan_p")) {
1678 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1679 if (len < 0)
34954ddc 1680 return len;
63adc6fb 1681
34954ddc
FF		 1682 i += len;
1683 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1684 pkt_dev->vlan_p = value;
1685 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1686 } else {
1687 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1688 }
1689 return count;
1690 }
1691
1692 if (!strcmp(name, "vlan_cfi")) {
1693 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1694 if (len < 0)
34954ddc 1695 return len;
63adc6fb 1696
34954ddc
FF		 1697 i += len;
1698 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1699 pkt_dev->vlan_cfi = value;
1700 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1701 } else {
1702 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1703 }
1704 return count;
1705 }
1706
1707 if (!strcmp(name, "svlan_id")) {
1708 len = num_arg(&user_buffer[i], 4, &value);
63adc6fb 1709 if (len < 0)
34954ddc 1710 return len;
63adc6fb 1711
34954ddc
FF		 1712 i += len;
1713 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1714 pkt_dev->svlan_id = value; /* turn on SVLAN */
1715
1716 if (debug)
f342cda7 1717 pr_debug("SVLAN turned on\n");
34954ddc
FF		 1718
1719 if (debug && pkt_dev->nr_labels)
f342cda7 1720 pr_debug("MPLS auto turned off\n");
34954ddc
FF		 1721
1722 pkt_dev->nr_labels = 0; /* turn off MPLS */
1723 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1724 } else {
1725 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1726 pkt_dev->svlan_id = 0xffff;
1727
1728 if (debug)
f342cda7 1729 pr_debug("VLAN/SVLAN turned off\n");
34954ddc
FF		 1730 }
1731 return count;
1732 }
1733
1734 if (!strcmp(name, "svlan_p")) {
1735 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1736 if (len < 0)
34954ddc 1737 return len;
63adc6fb 1738
34954ddc
FF		 1739 i += len;
1740 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1741 pkt_dev->svlan_p = value;
1742 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1743 } else {
1744 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1745 }
1746 return count;
1747 }
1748
1749 if (!strcmp(name, "svlan_cfi")) {
1750 len = num_arg(&user_buffer[i], 1, &value);
63adc6fb 1751 if (len < 0)
34954ddc 1752 return len;
63adc6fb 1753
34954ddc
FF		 1754 i += len;
1755 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1756 pkt_dev->svlan_cfi = value;
1757 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1758 } else {
1759 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1760 }
ca6549af
SW		 1761 return count;
1762 }
1763
1ca7768c
FF		 1764 if (!strcmp(name, "tos")) {
1765 __u32 tmp_value = 0;
1766 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
63adc6fb 1767 if (len < 0)
1ca7768c 1768 return len;
63adc6fb 1769
1ca7768c
FF		 1770 i += len;
1771 if (len == 2) {
1772 pkt_dev->tos = tmp_value;
1773 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1774 } else {
1775 sprintf(pg_result, "ERROR: tos must be 00-ff");
1776 }
1777 return count;
1778 }
1779
1780 if (!strcmp(name, "traffic_class")) {
1781 __u32 tmp_value = 0;
1782 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
63adc6fb 1783 if (len < 0)
1ca7768c 1784 return len;
63adc6fb 1785
1ca7768c
FF		 1786 i += len;
1787 if (len == 2) {
1788 pkt_dev->traffic_class = tmp_value;
1789 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1790 } else {
1791 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1792 }
1793 return count;
1794 }
1795
9e50e3ac
JF		 1796 if (!strcmp(name, "skb_priority")) {
1797 len = num_arg(&user_buffer[i], 9, &value);
1798 if (len < 0)
1799 return len;
1800
1801 i += len;
1802 pkt_dev->skb_priority = value;
1803 sprintf(pg_result, "OK: skb_priority=%i",
1804 pkt_dev->skb_priority);
1805 return count;
1806 }
1807
1da177e4
LT		 1808 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1809 return -EINVAL;
1810}
1811
d50a6b56 1812static int pktgen_if_open(struct inode *inode, struct file *file)
1da177e4 1813{
359745d7 1814 return single_open(file, pktgen_if_show, pde_data(inode));
d50a6b56 1815}
1da177e4 1816
97a32539
AD		 1817static const struct proc_ops pktgen_if_proc_ops = {
1818 .proc_open = pktgen_if_open,
1819 .proc_read = seq_read,
1820 .proc_lseek = seq_lseek,
1821 .proc_write = pktgen_if_write,
1822 .proc_release = single_release,
d50a6b56 1823};
1da177e4 1824
d50a6b56
SH		 1825static int pktgen_thread_show(struct seq_file *seq, void *v)
1826{
222f1806 1827 struct pktgen_thread *t = seq->private;
648fda74 1828 const struct pktgen_dev *pkt_dev;
d50a6b56
SH		 1829
1830 BUG_ON(!t);
1da177e4 1831
97dc48e2 1832 seq_puts(seq, "Running: ");
1da177e4 1833
8788370a
JDB		 1834 rcu_read_lock();
1835 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
222f1806 1836 if (pkt_dev->running)
593f63b0 1837 seq_printf(seq, "%s ", pkt_dev->odevname);
1da177e4 1838
97dc48e2 1839 seq_puts(seq, "\nStopped: ");
222f1806 1840
8788370a 1841 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
222f1806 1842 if (!pkt_dev->running)
593f63b0 1843 seq_printf(seq, "%s ", pkt_dev->odevname);
1da177e4
LT		 1844
1845 if (t->result[0])
d50a6b56 1846 seq_printf(seq, "\nResult: %s\n", t->result);
1da177e4 1847 else
97dc48e2 1848 seq_puts(seq, "\nResult: NA\n");
1da177e4 1849
8788370a 1850 rcu_read_unlock();
1da177e4 1851
d50a6b56 1852 return 0;
1da177e4
LT		 1853}
1854
d50a6b56 1855static ssize_t pktgen_thread_write(struct file *file,
222f1806
LC		 1856 const char __user * user_buffer,
1857 size_t count, loff_t * offset)
1da177e4 1858{
8a994a71 1859 struct seq_file *seq = file->private_data;
222f1806 1860 struct pktgen_thread *t = seq->private;
d6182223 1861 int i, max, len, ret;
1da177e4 1862 char name[40];
222f1806 1863 char *pg_result;
d50a6b56 1864
1da177e4 1865 if (count < 1) {
222f1806 1866 // sprintf(pg_result, "Wrong command format");
1da177e4
LT		 1867 return -EINVAL;
1868 }
d50a6b56 1869
d6182223
PG		 1870 max = count;
1871 len = count_trail_chars(user_buffer, max);
222f1806 1872 if (len < 0)
d50a6b56
SH		 1873 return len;
1874
d6182223 1875 i = len;
d50a6b56 1876
1da177e4
LT		 1877 /* Read variable name */
1878
1879 len = strn_len(&user_buffer[i], sizeof(name) - 1);
222f1806 1880 if (len < 0)
d50a6b56 1881 return len;
222f1806 1882
1da177e4
LT		 1883 memset(name, 0, sizeof(name));
1884 if (copy_from_user(name, &user_buffer[i], len))
1885 return -EFAULT;
1886 i += len;
d50a6b56 1887
222f1806 1888 max = count - i;
1da177e4 1889 len = count_trail_chars(&user_buffer[i], max);
222f1806 1890 if (len < 0)
d50a6b56
SH		 1891 return len;
1892
1da177e4
LT		 1893 i += len;
1894
d50a6b56 1895 if (debug)
f342cda7 1896 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1da177e4 1897
222f1806 1898 if (!t) {
f9467eae 1899 pr_err("ERROR: No thread\n");
1da177e4
LT		 1900 ret = -EINVAL;
1901 goto out;
1902 }
1903
1904 pg_result = &(t->result[0]);
1905
222f1806
LC		 1906 if (!strcmp(name, "add_device")) {
1907 char f[32];
1908 memset(f, 0, 32);
1da177e4 1909 len = strn_len(&user_buffer[i], sizeof(f) - 1);
222f1806
LC		 1910 if (len < 0) {
1911 ret = len;
1da177e4
LT		 1912 goto out;
1913 }
222f1806 1914 if (copy_from_user(f, &user_buffer[i], len))
1da177e4
LT		 1915 return -EFAULT;
1916 i += len;
6146e6a4 1917 mutex_lock(&pktgen_thread_lock);
604dfd6e 1918 ret = pktgen_add_device(t, f);
6146e6a4 1919 mutex_unlock(&pktgen_thread_lock);
604dfd6e
CW		 1920 if (!ret) {
1921 ret = count;
1922 sprintf(pg_result, "OK: add_device=%s", f);
1923 } else
1924 sprintf(pg_result, "ERROR: can not add device %s", f);
1da177e4
LT		 1925 goto out;
1926 }
1927
222f1806 1928 if (!strcmp(name, "rem_device_all")) {
6146e6a4 1929 mutex_lock(&pktgen_thread_lock);
95ed63f7 1930 t->control |= T_REMDEVALL;
6146e6a4 1931 mutex_unlock(&pktgen_thread_lock);
222f1806 1932 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1da177e4 1933 ret = count;
222f1806 1934 sprintf(pg_result, "OK: rem_device_all");
1da177e4
LT		 1935 goto out;
1936 }
1937
222f1806 1938 if (!strcmp(name, "max_before_softirq")) {
b163911f 1939 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
222f1806 1940 ret = count;
1da177e4
LT		 1941 goto out;
1942 }
1943
1944 ret = -EINVAL;
222f1806 1945out:
1da177e4
LT		 1946 return ret;
1947}
1948
d50a6b56 1949static int pktgen_thread_open(struct inode *inode, struct file *file)
1da177e4 1950{
359745d7 1951 return single_open(file, pktgen_thread_show, pde_data(inode));
1da177e4
LT		 1952}
1953
97a32539
AD		 1954static const struct proc_ops pktgen_thread_proc_ops = {
1955 .proc_open = pktgen_thread_open,
1956 .proc_read = seq_read,
1957 .proc_lseek = seq_lseek,
1958 .proc_write = pktgen_thread_write,
1959 .proc_release = single_release,
d50a6b56 1960};
1da177e4
LT		 1961
1962/* Think find or remove for NN */
4e58a027
CW		 1963static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1964 const char *ifname, int remove)
1da177e4
LT		 1965{
1966 struct pktgen_thread *t;
1967 struct pktgen_dev *pkt_dev = NULL;
3e984840 1968 bool exact = (remove == FIND);
1da177e4 1969
4e58a027 1970 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3e984840 1971 pkt_dev = pktgen_find_dev(t, ifname, exact);
1da177e4 1972 if (pkt_dev) {
222f1806 1973 if (remove) {
222f1806
LC		 1974 pkt_dev->removal_mark = 1;
1975 t->control |= T_REMDEV;
222f1806 1976 }
1da177e4
LT		 1977 break;
1978 }
1da177e4 1979 }
222f1806 1980 return pkt_dev;
1da177e4
LT		 1981}
1982
95ed63f7
AK		 1983/*
1984 * mark a device for removal
1985 */
4e58a027 1986static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1da177e4
LT		 1987{
1988 struct pktgen_dev *pkt_dev = NULL;
95ed63f7
AK		 1989 const int max_tries = 10, msec_per_try = 125;
1990 int i = 0;
95ed63f7 1991
6146e6a4 1992 mutex_lock(&pktgen_thread_lock);
f9467eae 1993 pr_debug("%s: marking %s for removal\n", __func__, ifname);
95ed63f7 1994
222f1806 1995 while (1) {
95ed63f7 1996
4e58a027 1997 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
222f1806
LC		 1998 if (pkt_dev == NULL)
1999 break; /* success */
95ed63f7 2000
6146e6a4 2001 mutex_unlock(&pktgen_thread_lock);
f9467eae
JP		 2002 pr_debug("%s: waiting for %s to disappear....\n",
2003 __func__, ifname);
95ed63f7 2004 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
6146e6a4 2005 mutex_lock(&pktgen_thread_lock);
95ed63f7
AK		 2006
2007 if (++i >= max_tries) {
f9467eae
JP		 2008 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
2009 __func__, msec_per_try * i, ifname);
95ed63f7
AK		 2010 break;
2011 }
2012
2013 }
2014
6146e6a4 2015 mutex_unlock(&pktgen_thread_lock);
39df232f 2016}
95ed63f7 2017
4e58a027 2018static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
39df232f
SH		 2019{
2020 struct pktgen_thread *t;
2021
9a0b1e8b
ED		 2022 mutex_lock(&pktgen_thread_lock);
2023
4e58a027 2024 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
39df232f
SH		 2025 struct pktgen_dev *pkt_dev;
2026
9a0b1e8b
ED		 2027 if_lock(t);
2028 list_for_each_entry(pkt_dev, &t->if_list, list) {
39df232f
SH		 2029 if (pkt_dev->odev != dev)
2030 continue;
2031
a8ca16ea 2032 proc_remove(pkt_dev->entry);
39df232f 2033
2975315b 2034 pkt_dev->entry = proc_create_data(dev->name, 0600,
4e58a027 2035 pn->proc_dir,
97a32539 2036 &pktgen_if_proc_ops,
2975315b 2037 pkt_dev);
39df232f 2038 if (!pkt_dev->entry)
f9467eae
JP		 2039 pr_err("can't move proc entry for '%s'\n",
2040 dev->name);
39df232f
SH		 2041 break;
2042 }
9a0b1e8b 2043 if_unlock(t);
39df232f 2044 }
9a0b1e8b 2045 mutex_unlock(&pktgen_thread_lock);
1da177e4
LT		 2046}
2047
222f1806
LC		 2048static int pktgen_device_event(struct notifier_block *unused,
2049 unsigned long event, void *ptr)
1da177e4 2050{
351638e7 2051 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4e58a027 2052 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1da177e4 2053
4e58a027 2054 if (pn->pktgen_exiting)
e9dc8653
EB		 2055 return NOTIFY_DONE;
2056
1da177e4
LT		 2057 /* It is OK that we do not hold the group lock right now,
2058 * as we run under the RTNL lock.
2059 */
2060
2061 switch (event) {
39df232f 2062 case NETDEV_CHANGENAME:
4e58a027 2063 pktgen_change_name(pn, dev);
1da177e4 2064 break;
222f1806 2065
1da177e4 2066 case NETDEV_UNREGISTER:
4e58a027 2067 pktgen_mark_device(pn, dev->name);
1da177e4 2068 break;
3ff50b79 2069 }
1da177e4
LT		 2070
2071 return NOTIFY_DONE;
2072}
2073
4e58a027
CW		 2074static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2075 struct pktgen_dev *pkt_dev,
63adc6fb 2076 const char *ifname)
e6fce5b9
RO		 2077{
2078 char b[IFNAMSIZ+5];
d6182223 2079 int i;
e6fce5b9 2080
63adc6fb
SH		 2081 for (i = 0; ifname[i] != '@'; i++) {
2082 if (i == IFNAMSIZ)
e6fce5b9
RO		 2083 break;
2084
2085 b[i] = ifname[i];
2086 }
2087 b[i] = 0;
2088
4e58a027 2089 return dev_get_by_name(pn->net, b);
e6fce5b9
RO		 2090}
2091
2092
1da177e4
LT		 2093/* Associate pktgen_dev with a device. */
2094
4e58a027
CW		 2095static int pktgen_setup_dev(const struct pktgen_net *pn,
2096 struct pktgen_dev *pkt_dev, const char *ifname)
222f1806 2097{
1da177e4 2098 struct net_device *odev;
39df232f 2099 int err;
1da177e4
LT		 2100
2101 /* Clean old setups */
1da177e4 2102 if (pkt_dev->odev) {
d62607c3 2103 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
222f1806
LC		 2104 pkt_dev->odev = NULL;
2105 }
1da177e4 2106
4e58a027 2107 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
1da177e4 2108 if (!odev) {
f9467eae 2109 pr_err("no such netdevice: \"%s\"\n", ifname);
39df232f 2110 return -ENODEV;
1da177e4 2111 }
39df232f 2112
1e09e581
LW		 2113 if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) {
2114 pr_err("not an ethernet or loopback device: \"%s\"\n", ifname);
39df232f
SH		 2115 err = -EINVAL;
2116 } else if (!netif_running(odev)) {
f9467eae 2117 pr_err("device is down: \"%s\"\n", ifname);
39df232f
SH		 2118 err = -ENETDOWN;
2119 } else {
2120 pkt_dev->odev = odev;
035f1f2b 2121 netdev_tracker_alloc(odev, &pkt_dev->dev_tracker, GFP_KERNEL);
39df232f 2122 return 0;
1da177e4 2123 }
1da177e4 2124
1da177e4 2125 dev_put(odev);
39df232f 2126 return err;
1da177e4
LT		 2127}
2128
2129/* Read pkt_dev from the interface and set up internal pktgen_dev
2130 * structure to have the right information to create/send packets
2131 */
2132static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2133{
64c00d81
AG		 2134 int ntxq;
2135
222f1806 2136 if (!pkt_dev->odev) {
f9467eae 2137 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
222f1806
LC		 2138 sprintf(pkt_dev->result,
2139 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2140 return;
2141 }
2142
64c00d81
AG		 2143 /* make sure that we don't pick a non-existing transmit queue */
2144 ntxq = pkt_dev->odev->real_num_tx_queues;
bfdbc0ac 2145
64c00d81 2146 if (ntxq <= pkt_dev->queue_map_min) {
294a0b7f
JP		 2147 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2148 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2149 pkt_dev->odevname);
26e29eed 2150 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
64c00d81 2151 }
88271660 2152 if (pkt_dev->queue_map_max >= ntxq) {
294a0b7f
JP		 2153 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2154 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2155 pkt_dev->odevname);
26e29eed 2156 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
64c00d81
AG		 2157 }
2158
222f1806 2159 /* Default to the interface's mac if not explicitly set. */
1da177e4 2160
f404e9a6 2161 if (is_zero_ether_addr(pkt_dev->src_mac))
9ea08b12 2162 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
1da177e4 2163
222f1806 2164 /* Set up Dest MAC */
9ea08b12 2165 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
1da177e4 2166
222f1806 2167 if (pkt_dev->flags & F_IPV6) {
4c139b8c
AW		 2168 int i, set = 0, err = 1;
2169 struct inet6_dev *idev;
2170
68bf9f0b
AW		 2171 if (pkt_dev->min_pkt_size == 0) {
2172 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2173 + sizeof(struct udphdr)
2174 + sizeof(struct pktgen_hdr)
2175 + pkt_dev->pkt_overhead;
2176 }
2177
df7e8e2e 2178 for (i = 0; i < sizeof(struct in6_addr); i++)
222f1806 2179 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1da177e4
LT		 2180 set = 1;
2181 break;
2182 }
2183
222f1806
LC		 2184 if (!set) {
2185
1da177e4
LT		 2186 /*
2187 * Use linklevel address if unconfigured.
2188 *
2189 * use ipv6_get_lladdr if/when it's get exported
2190 */
2191
8814c4b5 2192 rcu_read_lock();
63adc6fb
SH		 2193 idev = __in6_dev_get(pkt_dev->odev);
2194 if (idev) {
1da177e4
LT		 2195 struct inet6_ifaddr *ifp;
2196
2197 read_lock_bh(&idev->lock);
4c139b8c
AW		 2198 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2199 if ((ifp->scope & IFA_LINK) &&
f64f9e71 2200 !(ifp->flags & IFA_F_TENTATIVE)) {
4e3fd7a0 2201 pkt_dev->cur_in6_saddr = ifp->addr;
1da177e4
LT		 2202 err = 0;
2203 break;
2204 }
2205 }
2206 read_unlock_bh(&idev->lock);
2207 }
8814c4b5 2208 rcu_read_unlock();
222f1806 2209 if (err)
f9467eae 2210 pr_err("ERROR: IPv6 link address not available\n");
1da177e4 2211 }
222f1806 2212 } else {
68bf9f0b
AW		 2213 if (pkt_dev->min_pkt_size == 0) {
2214 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2215 + sizeof(struct udphdr)
2216 + sizeof(struct pktgen_hdr)
2217 + pkt_dev->pkt_overhead;
2218 }
2219
1da177e4
LT		 2220 pkt_dev->saddr_min = 0;
2221 pkt_dev->saddr_max = 0;
2222 if (strlen(pkt_dev->src_min) == 0) {
222f1806
LC		 2223
2224 struct in_device *in_dev;
1da177e4
LT		 2225
2226 rcu_read_lock();
e5ed6399 2227 in_dev = __in_dev_get_rcu(pkt_dev->odev);
1da177e4 2228 if (in_dev) {
2638eb8b
FW		 2229 const struct in_ifaddr *ifa;
2230
2231 ifa = rcu_dereference(in_dev->ifa_list);
2232 if (ifa) {
2233 pkt_dev->saddr_min = ifa->ifa_address;
1da177e4
LT		 2234 pkt_dev->saddr_max = pkt_dev->saddr_min;
2235 }
1da177e4
LT		 2236 }
2237 rcu_read_unlock();
222f1806 2238 } else {
1da177e4
LT		 2239 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2240 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2241 }
2242
2243 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2244 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2245 }
222f1806 2246 /* Initialize current values. */
68bf9f0b
AW		 2247 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2248 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2249 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2250
222f1806
LC		 2251 pkt_dev->cur_dst_mac_offset = 0;
2252 pkt_dev->cur_src_mac_offset = 0;
2253 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2254 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2255 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2256 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1da177e4
LT		 2257 pkt_dev->nflows = 0;
2258}
2259
fd29cf72
SH		 2260
2261static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2262{
ef87979c 2263 ktime_t start_time, end_time;
417bc4b8 2264 s64 remaining;
2bc481cf
SH		 2265 struct hrtimer_sleeper t;
2266
dbc1625f 2267 hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2bc481cf
SH		 2268 hrtimer_set_expires(&t.timer, spin_until);
2269
43d28b65 2270 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
bcf91bdb
GR		 2271 if (remaining <= 0)
2272 goto out;
2bc481cf 2273
398f382c 2274 start_time = ktime_get();
33136d12
ED		 2275 if (remaining < 100000) {
2276 /* for small delays (<100us), just loop until limit is reached */
2277 do {
398f382c
DB		 2278 end_time = ktime_get();
2279 } while (ktime_compare(end_time, spin_until) < 0);
33136d12 2280 } else {
2bc481cf
SH		 2281 do {
2282 set_current_state(TASK_INTERRUPTIBLE);
9dd8813e 2283 hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS);
2bc481cf
SH		 2284
2285 if (likely(t.task))
1da177e4 2286 schedule();
1da177e4 2287
2bc481cf
SH		 2288 hrtimer_cancel(&t.timer);
2289 } while (t.task && pkt_dev->running && !signal_pending(current));
2290 __set_current_state(TASK_RUNNING);
398f382c 2291 end_time = ktime_get();
1da177e4 2292 }
ef87979c
SH		 2293
2294 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
bcf91bdb 2295out:
07a0f0f0 2296 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
bcf91bdb 2297 destroy_hrtimer_on_stack(&t.timer);
1da177e4
LT		 2298}
2299
16dab72f
JHS		 2300static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2301{
63d75463 2302 pkt_dev->pkt_overhead = 0;
16dab72f
JHS		 2303 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2304 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2305 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2306}
2307
648fda74 2308static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
007a531b 2309{
648fda74 2310 return !!(pkt_dev->flows[flow].flags & F_INIT);
007a531b
JHS		 2311}
2312
2313static inline int f_pick(struct pktgen_dev *pkt_dev)
2314{
2315 int flow = pkt_dev->curfl;
2316
2317 if (pkt_dev->flags & F_FLOW_SEQ) {
2318 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2319 /* reset time */
2320 pkt_dev->flows[flow].count = 0;
1211a645 2321 pkt_dev->flows[flow].flags = 0;
007a531b
JHS		 2322 pkt_dev->curfl += 1;
2323 if (pkt_dev->curfl >= pkt_dev->cflows)
2324 pkt_dev->curfl = 0; /*reset */
2325 }
2326 } else {
81895a65 2327 flow = prandom_u32_max(pkt_dev->cflows);
1211a645 2328 pkt_dev->curfl = flow;
007a531b 2329
1211a645 2330 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
007a531b 2331 pkt_dev->flows[flow].count = 0;
1211a645
RO		 2332 pkt_dev->flows[flow].flags = 0;
2333 }
007a531b
JHS		 2334 }
2335
2336 return pkt_dev->curfl;
2337}
2338
a553e4a6
JHS		 2339
2340#ifdef CONFIG_XFRM
2341/* If there was already an IPSEC SA, we keep it as is, else
2342 * we go look for it ...
2343*/
bd55775c 2344#define DUMMY_MARK 0
fea1ab0f 2345static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
a553e4a6
JHS		 2346{
2347 struct xfrm_state *x = pkt_dev->flows[flow].x;
4e58a027 2348 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
a553e4a6 2349 if (!x) {
c454997e
FD		 2350
2351 if (pkt_dev->spi) {
2352 /* We need as quick as possible to find the right SA
2353 * Searching with minimum criteria to archieve this.
2354 */
2355 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2356 } else {
2357 /* slow path: we dont already have xfrm_state */
7e652640 2358 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
c454997e
FD		 2359 (xfrm_address_t *)&pkt_dev->cur_daddr,
2360 (xfrm_address_t *)&pkt_dev->cur_saddr,
2361 AF_INET,
2362 pkt_dev->ipsmode,
2363 pkt_dev->ipsproto, 0);
2364 }
a553e4a6
JHS		 2365 if (x) {
2366 pkt_dev->flows[flow].x = x;
2367 set_pkt_overhead(pkt_dev);
63adc6fb 2368 pkt_dev->pkt_overhead += x->props.header_len;
a553e4a6
JHS		 2369 }
2370
2371 }
2372}
2373#endif
fd2ea0a7
DM		 2374static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2375{
e6fce5b9
RO		 2376
2377 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2378 pkt_dev->cur_queue_map = smp_processor_id();
2379
896a7cf8 2380 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
fd2ea0a7
DM		 2381 __u16 t;
2382 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
81895a65
JD		 2383 t = prandom_u32_max(pkt_dev->queue_map_max -
2384 pkt_dev->queue_map_min + 1) +
2385 pkt_dev->queue_map_min;
fd2ea0a7
DM		 2386 } else {
2387 t = pkt_dev->cur_queue_map + 1;
2388 if (t > pkt_dev->queue_map_max)
2389 t = pkt_dev->queue_map_min;
2390 }
2391 pkt_dev->cur_queue_map = t;
2392 }
bfdbc0ac 2393 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
fd2ea0a7
DM		 2394}
2395
1da177e4
LT		 2396/* Increment/randomize headers according to flags and current values
2397 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2398 */
222f1806
LC		 2399static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2400{
2401 __u32 imn;
2402 __u32 imx;
2403 int flow = 0;
1da177e4 2404
007a531b
JHS		 2405 if (pkt_dev->cflows)
2406 flow = f_pick(pkt_dev);
1da177e4
LT		 2407
2408 /* Deal with source MAC */
222f1806
LC		 2409 if (pkt_dev->src_mac_count > 1) {
2410 __u32 mc;
2411 __u32 tmp;
2412
2413 if (pkt_dev->flags & F_MACSRC_RND)
81895a65 2414 mc = prandom_u32_max(pkt_dev->src_mac_count);
222f1806
LC		 2415 else {
2416 mc = pkt_dev->cur_src_mac_offset++;
ff2a79a5 2417 if (pkt_dev->cur_src_mac_offset >=
222f1806
LC		 2418 pkt_dev->src_mac_count)
2419 pkt_dev->cur_src_mac_offset = 0;
2420 }
2421
2422 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2423 pkt_dev->hh[11] = tmp;
2424 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2425 pkt_dev->hh[10] = tmp;
2426 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2427 pkt_dev->hh[9] = tmp;
2428 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2429 pkt_dev->hh[8] = tmp;
2430 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2431 pkt_dev->hh[7] = tmp;
2432 }
2433
2434 /* Deal with Destination MAC */
2435 if (pkt_dev->dst_mac_count > 1) {
2436 __u32 mc;
2437 __u32 tmp;
2438
2439 if (pkt_dev->flags & F_MACDST_RND)
81895a65 2440 mc = prandom_u32_max(pkt_dev->dst_mac_count);
222f1806
LC		 2441
2442 else {
2443 mc = pkt_dev->cur_dst_mac_offset++;
ff2a79a5 2444 if (pkt_dev->cur_dst_mac_offset >=
222f1806
LC		 2445 pkt_dev->dst_mac_count) {
2446 pkt_dev->cur_dst_mac_offset = 0;
2447 }
2448 }
2449
2450 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2451 pkt_dev->hh[5] = tmp;
2452 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2453 pkt_dev->hh[4] = tmp;
2454 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2455 pkt_dev->hh[3] = tmp;
2456 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2457 pkt_dev->hh[2] = tmp;
2458 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2459 pkt_dev->hh[1] = tmp;
2460 }
2461
ca6549af 2462 if (pkt_dev->flags & F_MPLS_RND) {
95c96174 2463 unsigned int i;
e71a4783 2464 for (i = 0; i < pkt_dev->nr_labels; i++)
ca6549af
SW		 2465 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2466 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
a251c17a 2467 ((__force __be32)get_random_u32() &
ca6549af
SW		 2468 htonl(0x000fffff));
2469 }
2470
34954ddc 2471 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
81895a65 2472 pkt_dev->vlan_id = prandom_u32_max(4096);
34954ddc
FF		 2473 }
2474
2475 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
81895a65 2476 pkt_dev->svlan_id = prandom_u32_max(4096);
34954ddc
FF		 2477 }
2478
222f1806
LC		 2479 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2480 if (pkt_dev->flags & F_UDPSRC_RND)
81895a65
JD		 2481 pkt_dev->cur_udp_src = prandom_u32_max(
2482 pkt_dev->udp_src_max - pkt_dev->udp_src_min) +
2483 pkt_dev->udp_src_min;
222f1806
LC		 2484
2485 else {
1da177e4
LT		 2486 pkt_dev->cur_udp_src++;
2487 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2488 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
222f1806
LC		 2489 }
2490 }
2491
2492 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2493 if (pkt_dev->flags & F_UDPDST_RND) {
81895a65
JD		 2494 pkt_dev->cur_udp_dst = prandom_u32_max(
2495 pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) +
2496 pkt_dev->udp_dst_min;
222f1806 2497 } else {
1da177e4 2498 pkt_dev->cur_udp_dst++;
222f1806 2499 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1da177e4 2500 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
222f1806
LC		 2501 }
2502 }
1da177e4
LT		 2503
2504 if (!(pkt_dev->flags & F_IPV6)) {
2505
63adc6fb
SH		 2506 imn = ntohl(pkt_dev->saddr_min);
2507 imx = ntohl(pkt_dev->saddr_max);
2508 if (imn < imx) {
1da177e4 2509 __u32 t;
222f1806 2510 if (pkt_dev->flags & F_IPSRC_RND)
81895a65 2511 t = prandom_u32_max(imx - imn) + imn;
1da177e4
LT		 2512 else {
2513 t = ntohl(pkt_dev->cur_saddr);
2514 t++;
63adc6fb 2515 if (t > imx)
1da177e4 2516 t = imn;
63adc6fb 2517
1da177e4
LT		 2518 }
2519 pkt_dev->cur_saddr = htonl(t);
2520 }
222f1806 2521
007a531b 2522 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
1da177e4
LT		 2523 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2524 } else {
252e3346
AV		 2525 imn = ntohl(pkt_dev->daddr_min);
2526 imx = ntohl(pkt_dev->daddr_max);
2527 if (imn < imx) {
1da177e4 2528 __u32 t;
252e3346 2529 __be32 s;
1da177e4
LT		 2530 if (pkt_dev->flags & F_IPDST_RND) {
2531
70e3ba72 2532 do {
81895a65
JD		 2533 t = prandom_u32_max(imx - imn) +
2534 imn;
252e3346 2535 s = htonl(t);
70e3ba72
AM		 2536 } while (ipv4_is_loopback(s) ||
2537 ipv4_is_multicast(s) ||
2538 ipv4_is_lbcast(s) ||
2539 ipv4_is_zeronet(s) ||
2540 ipv4_is_local_multicast(s));
252e3346
AV		 2541 pkt_dev->cur_daddr = s;
2542 } else {
1da177e4
LT		 2543 t = ntohl(pkt_dev->cur_daddr);
2544 t++;
2545 if (t > imx) {
2546 t = imn;
2547 }
2548 pkt_dev->cur_daddr = htonl(t);
2549 }
2550 }
222f1806 2551 if (pkt_dev->cflows) {
007a531b 2552 pkt_dev->flows[flow].flags |= F_INIT;
222f1806
LC		 2553 pkt_dev->flows[flow].cur_daddr =
2554 pkt_dev->cur_daddr;
a553e4a6 2555#ifdef CONFIG_XFRM
6f107c74 2556 if (pkt_dev->flags & F_IPSEC)
a553e4a6
JHS		 2557 get_ipsec_sa(pkt_dev, flow);
2558#endif
1da177e4
LT		 2559 pkt_dev->nflows++;
2560 }
2561 }
222f1806
LC		 2562 } else { /* IPV6 * */
2563
06e30411 2564 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
1da177e4
LT		 2565 int i;
2566
2567 /* Only random destinations yet */
2568
222f1806 2569 for (i = 0; i < 4; i++) {
1da177e4 2570 pkt_dev->cur_in6_daddr.s6_addr32[i] =
a251c17a 2571 (((__force __be32)get_random_u32() |
222f1806
LC		 2572 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2573 pkt_dev->max_in6_daddr.s6_addr32[i]);
1da177e4 2574 }
222f1806 2575 }
1da177e4
LT		 2576 }
2577
222f1806
LC		 2578 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2579 __u32 t;
2580 if (pkt_dev->flags & F_TXSIZE_RND) {
81895a65
JD		 2581 t = prandom_u32_max(pkt_dev->max_pkt_size -
2582 pkt_dev->min_pkt_size) +
2583 pkt_dev->min_pkt_size;
222f1806 2584 } else {
1da177e4 2585 t = pkt_dev->cur_pkt_size + 1;
222f1806 2586 if (t > pkt_dev->max_pkt_size)
1da177e4 2587 t = pkt_dev->min_pkt_size;
222f1806
LC		 2588 }
2589 pkt_dev->cur_pkt_size = t;
90149031
NR		 2590 } else if (pkt_dev->n_imix_entries > 0) {
2591 struct imix_pkt *entry;
81895a65 2592 __u32 t = prandom_u32_max(IMIX_PRECISION);
90149031
NR		 2593 __u8 entry_index = pkt_dev->imix_distribution[t];
2594
2595 entry = &pkt_dev->imix_entries[entry_index];
2596 entry->count_so_far++;
2597 pkt_dev->cur_pkt_size = entry->size;
222f1806 2598 }
1da177e4 2599
fd2ea0a7 2600 set_cur_queue_map(pkt_dev);
45b270f8 2601
1da177e4
LT		 2602 pkt_dev->flows[flow].count++;
2603}
2604
7e5a3ef6
NR		 2605static void fill_imix_distribution(struct pktgen_dev *pkt_dev)
2606{
2607 int cumulative_probabilites[MAX_IMIX_ENTRIES];
2608 int j = 0;
2609 __u64 cumulative_prob = 0;
2610 __u64 total_weight = 0;
2611 int i = 0;
2612
2613 for (i = 0; i < pkt_dev->n_imix_entries; i++)
2614 total_weight += pkt_dev->imix_entries[i].weight;
2615
2616 /* Fill cumulative_probabilites with sum of normalized probabilities */
2617 for (i = 0; i < pkt_dev->n_imix_entries - 1; i++) {
2618 cumulative_prob += div64_u64(pkt_dev->imix_entries[i].weight *
2619 IMIX_PRECISION,
2620 total_weight);
2621 cumulative_probabilites[i] = cumulative_prob;
2622 }
2623 cumulative_probabilites[pkt_dev->n_imix_entries - 1] = 100;
2624
2625 for (i = 0; i < IMIX_PRECISION; i++) {
2626 if (i == cumulative_probabilites[j])
2627 j++;
2628 pkt_dev->imix_distribution[i] = j;
2629 }
2630}
a553e4a6
JHS		 2631
2632#ifdef CONFIG_XFRM
5537a055 2633static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
cf93d47e
FD		 2634
2635 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2636};
2637
a553e4a6
JHS		 2638static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2639{
2640 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2641 int err = 0;
6de9ace4 2642 struct net *net = dev_net(pkt_dev->odev);
a553e4a6
JHS		 2643
2644 if (!x)
2645 return 0;
2646 /* XXX: we dont support tunnel mode for now until
2647 * we resolve the dst issue */
cf93d47e 2648 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
a553e4a6
JHS		 2649 return 0;
2650
cf93d47e
FD		 2651 /* But when user specify an valid SPI, transformation
2652 * supports both transport/tunnel mode + ESP/AH type.
2653 */
2654 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
b6ca8bd5 2655 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
cf93d47e
FD		 2656
2657 rcu_read_lock_bh();
0c620e97 2658 err = pktgen_xfrm_outer_mode_output(x, skb);
cf93d47e 2659 rcu_read_unlock_bh();
6de9ace4
FD		 2660 if (err) {
2661 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
a553e4a6 2662 goto error;
6de9ace4 2663 }
a553e4a6 2664 err = x->type->output(x, skb);
6de9ace4
FD		 2665 if (err) {
2666 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
a553e4a6 2667 goto error;
6de9ace4 2668 }
0af0a413 2669 spin_lock_bh(&x->lock);
63adc6fb 2670 x->curlft.bytes += skb->len;
a553e4a6 2671 x->curlft.packets++;
0af0a413 2672 spin_unlock_bh(&x->lock);
a553e4a6 2673error:
a553e4a6
JHS		 2674 return err;
2675}
2676
475ac1e4 2677static void free_SAs(struct pktgen_dev *pkt_dev)
a553e4a6
JHS		 2678{
2679 if (pkt_dev->cflows) {
2680 /* let go of the SAs if we have them */
d6182223
PG		 2681 int i;
2682 for (i = 0; i < pkt_dev->cflows; i++) {
a553e4a6
JHS		 2683 struct xfrm_state *x = pkt_dev->flows[i].x;
2684 if (x) {
2685 xfrm_state_put(x);
2686 pkt_dev->flows[i].x = NULL;
2687 }
2688 }
2689 }
2690}
2691
475ac1e4 2692static int process_ipsec(struct pktgen_dev *pkt_dev,
a553e4a6
JHS		 2693 struct sk_buff *skb, __be16 protocol)
2694{
6f107c74 2695 if (pkt_dev->flags & F_IPSEC) {
a553e4a6
JHS		 2696 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2697 int nhead = 0;
2698 if (x) {
d4969581 2699 struct ethhdr *eth;
3868204d 2700 struct iphdr *iph;
d4969581 2701 int ret;
3868204d 2702
a553e4a6 2703 nhead = x->props.header_len - skb_headroom(skb);
63adc6fb 2704 if (nhead > 0) {
a553e4a6
JHS		 2705 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2706 if (ret < 0) {
f9467eae
JP		 2707 pr_err("Error expanding ipsec packet %d\n",
2708 ret);
b4bb4ac8 2709 goto err;
a553e4a6
JHS		 2710 }
2711 }
2712
2713 /* ipsec is not expecting ll header */
2714 skb_pull(skb, ETH_HLEN);
2715 ret = pktgen_output_ipsec(skb, pkt_dev);
2716 if (ret) {
f9467eae 2717 pr_err("Error creating ipsec packet %d\n", ret);
b4bb4ac8 2718 goto err;
a553e4a6
JHS		 2719 }
2720 /* restore ll */
d58ff351 2721 eth = skb_push(skb, ETH_HLEN);
d4969581
ED		 2722 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2723 eth->h_proto = protocol;
3868204d 2724
2725 /* Update IPv4 header len as well as checksum value */
2726 iph = ip_hdr(skb);
2727 iph->tot_len = htons(skb->len - ETH_HLEN);
2728 ip_send_check(iph);
a553e4a6
JHS		 2729 }
2730 }
2731 return 1;
b4bb4ac8
IJ		 2732err:
2733 kfree_skb(skb);
2734 return 0;
a553e4a6
JHS		 2735}
2736#endif
2737
ca6549af
SW		 2738static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2739{
95c96174 2740 unsigned int i;
63adc6fb 2741 for (i = 0; i < pkt_dev->nr_labels; i++)
ca6549af 2742 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
63adc6fb 2743
ca6549af
SW		 2744 mpls--;
2745 *mpls |= MPLS_STACK_BOTTOM;
2746}
2747
0f37c605
AV		 2748static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2749 unsigned int prio)
2750{
2751 return htons(id | (cfi << 12) | (prio << 13));
2752}
2753
26ad7879
ED		 2754static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2755 int datalen)
2756{
7f5d3f27 2757 struct timespec64 timestamp;
26ad7879
ED		 2758 struct pktgen_hdr *pgh;
2759
4df864c1 2760 pgh = skb_put(skb, sizeof(*pgh));
26ad7879
ED		 2761 datalen -= sizeof(*pgh);
2762
2763 if (pkt_dev->nfrags <= 0) {
b080db58 2764 skb_put_zero(skb, datalen);
26ad7879
ED		 2765 } else {
2766 int frags = pkt_dev->nfrags;
2767 int i, len;
7d36a991 2768 int frag_len;
26ad7879
ED		 2769
2770
2771 if (frags > MAX_SKB_FRAGS)
2772 frags = MAX_SKB_FRAGS;
2773 len = datalen - frags * PAGE_SIZE;
2774 if (len > 0) {
b080db58 2775 skb_put_zero(skb, len);
26ad7879
ED		 2776 datalen = frags * PAGE_SIZE;
2777 }
2778
2779 i = 0;
dc91e3be
DM		 2780 frag_len = (datalen/frags) < PAGE_SIZE ?
2781 (datalen/frags) : PAGE_SIZE;
26ad7879
ED		 2782 while (datalen > 0) {
2783 if (unlikely(!pkt_dev->page)) {
2784 int node = numa_node_id();
2785
2786 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2787 node = pkt_dev->node;
2788 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2789 if (!pkt_dev->page)
2790 break;
2791 }
a0bec1cd 2792 get_page(pkt_dev->page);
ea2ab693 2793 skb_frag_set_page(skb, i, pkt_dev->page);
b54c9d5b 2794 skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0);
7d36a991 2795 /*last fragment, fill rest of data*/
2796 if (i == (frags - 1))
9e903e08 2797 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
dc91e3be 2798 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
7d36a991 2799 else
9e903e08
ED		 2800 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2801 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2802 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2803 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
26ad7879
ED		 2804 i++;
2805 skb_shinfo(skb)->nr_frags = i;
2806 }
26ad7879
ED		 2807 }
2808
2809 /* Stamp the time, and sequence number,
2810 * convert them to network byte order
2811 */
2812 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2813 pgh->seq_num = htonl(pkt_dev->seq_num);
2814
afb84b62
JDB		 2815 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2816 pgh->tv_sec = 0;
2817 pgh->tv_usec = 0;
2818 } else {
7f5d3f27
AB		 2819 /*
2820 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2821 * as done by wireshark, or y2038 when interpreted as signed.
2822 * This is probably harmless, but if anyone wants to improve
2823 * it, we could introduce a variant that puts 64-bit nanoseconds
2824 * into the respective header bytes.
2825 * This would also be slightly faster to read.
2826 */
2827 ktime_get_real_ts64(&timestamp);
afb84b62 2828 pgh->tv_sec = htonl(timestamp.tv_sec);
7f5d3f27 2829 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
afb84b62 2830 }
26ad7879
ED		 2831}
2832
7a6e288d 2833static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
63d75463 2834 struct pktgen_dev *pkt_dev)
7a6e288d 2835{
63d75463 2836 unsigned int extralen = LL_RESERVED_SPACE(dev);
7a6e288d 2837 struct sk_buff *skb = NULL;
63d75463 2838 unsigned int size;
7a6e288d 2839
63d75463 2840 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
7a6e288d
DB		 2841 if (pkt_dev->flags & F_NODE) {
2842 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2843
2844 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2845 if (likely(skb)) {
2846 skb_reserve(skb, NET_SKB_PAD);
2847 skb->dev = dev;
2848 }
2849 } else {
2850 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2851 }
3de03596 2852
63d75463 2853 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
3de03596 2854 if (likely(skb))
63d75463 2855 skb_reserve(skb, extralen - 16);
7a6e288d
DB		 2856
2857 return skb;
2858}
2859
222f1806
LC		 2860static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2861 struct pktgen_dev *pkt_dev)
1da177e4
LT		 2862{
2863 struct sk_buff *skb = NULL;
2864 __u8 *eth;
2865 struct udphdr *udph;
2866 int datalen, iplen;
2867 struct iphdr *iph;
d5f1ce9a 2868 __be16 protocol = htons(ETH_P_IP);
ca6549af 2869 __be32 *mpls;
34954ddc
FF		 2870 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2871 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2872 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2873 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
fd2ea0a7 2874 u16 queue_map;
ca6549af
SW		 2875
2876 if (pkt_dev->nr_labels)
d5f1ce9a 2877 protocol = htons(ETH_P_MPLS_UC);
222f1806 2878
34954ddc 2879 if (pkt_dev->vlan_id != 0xffff)
d5f1ce9a 2880 protocol = htons(ETH_P_8021Q);
34954ddc 2881
64053bee
RO		 2882 /* Update any of the values, used when we're incrementing various
2883 * fields.
2884 */
2885 mod_cur_headers(pkt_dev);
eb589063 2886 queue_map = pkt_dev->cur_queue_map;
64053bee 2887
63d75463 2888 skb = pktgen_alloc_skb(odev, pkt_dev);
1da177e4
LT		 2889 if (!skb) {
2890 sprintf(pkt_dev->result, "No memory");
2891 return NULL;
2892 }
2893
7a6e288d 2894 prefetchw(skb->data);
63d75463 2895 skb_reserve(skb, 16);
1da177e4
LT		 2896
2897 /* Reserve for ethernet and IP header */
d58ff351 2898 eth = skb_push(skb, 14);
4df864c1 2899 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
ca6549af
SW		 2900 if (pkt_dev->nr_labels)
2901 mpls_push(mpls, pkt_dev);
34954ddc
FF		 2902
2903 if (pkt_dev->vlan_id != 0xffff) {
e71a4783 2904 if (pkt_dev->svlan_id != 0xffff) {
4df864c1 2905 svlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 2906 *svlan_tci = build_tci(pkt_dev->svlan_id,
2907 pkt_dev->svlan_cfi,
2908 pkt_dev->svlan_p);
4df864c1
JB		 2909 svlan_encapsulated_proto = skb_put(skb,
2910 sizeof(__be16));
d5f1ce9a 2911 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
34954ddc 2912 }
4df864c1 2913 vlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 2914 *vlan_tci = build_tci(pkt_dev->vlan_id,
2915 pkt_dev->vlan_cfi,
2916 pkt_dev->vlan_p);
4df864c1 2917 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
d5f1ce9a 2918 *vlan_encapsulated_proto = htons(ETH_P_IP);
34954ddc
FF		 2919 }
2920
c145aeb3 2921 skb_reset_mac_header(skb);
525cebed 2922 skb_set_network_header(skb, skb->len);
4df864c1 2923 iph = skb_put(skb, sizeof(struct iphdr));
525cebed
TG		 2924
2925 skb_set_transport_header(skb, skb->len);
4df864c1 2926 udph = skb_put(skb, sizeof(struct udphdr));
fd2ea0a7 2927 skb_set_queue_mapping(skb, queue_map);
9e50e3ac
JF		 2928 skb->priority = pkt_dev->skb_priority;
2929
1da177e4 2930 memcpy(eth, pkt_dev->hh, 12);
252e3346 2931 *(__be16 *) & eth[12] = protocol;
1da177e4 2932
ca6549af
SW		 2933 /* Eth + IPh + UDPh + mpls */
2934 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
16dab72f 2935 pkt_dev->pkt_overhead;
6af773e7 2936 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
1da177e4 2937 datalen = sizeof(struct pktgen_hdr);
222f1806 2938
1da177e4
LT		 2939 udph->source = htons(pkt_dev->cur_udp_src);
2940 udph->dest = htons(pkt_dev->cur_udp_dst);
222f1806 2941 udph->len = htons(datalen + 8); /* DATA + udphdr */
c26bf4a5 2942 udph->check = 0;
1da177e4
LT		 2943
2944 iph->ihl = 5;
2945 iph->version = 4;
2946 iph->ttl = 32;
1ca7768c 2947 iph->tos = pkt_dev->tos;
222f1806 2948 iph->protocol = IPPROTO_UDP; /* UDP */
1da177e4
LT		 2949 iph->saddr = pkt_dev->cur_saddr;
2950 iph->daddr = pkt_dev->cur_daddr;
66ed1e5e
ED		 2951 iph->id = htons(pkt_dev->ip_id);
2952 pkt_dev->ip_id++;
1da177e4
LT		 2953 iph->frag_off = 0;
2954 iplen = 20 + 8 + datalen;
2955 iph->tot_len = htons(iplen);
03c633e7 2956 ip_send_check(iph);
ca6549af 2957 skb->protocol = protocol;
1da177e4
LT		 2958 skb->dev = odev;
2959 skb->pkt_type = PACKET_HOST;
c26bf4a5 2960
7744b5f3
SD		 2961 pktgen_finalize_skb(pkt_dev, skb, datalen);
2962
c26bf4a5
TG		 2963 if (!(pkt_dev->flags & F_UDPCSUM)) {
2964 skb->ip_summed = CHECKSUM_NONE;
c8cd0989 2965 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
c26bf4a5
TG		 2966 skb->ip_summed = CHECKSUM_PARTIAL;
2967 skb->csum = 0;
7744b5f3 2968 udp4_hwcsum(skb, iph->saddr, iph->daddr);
c26bf4a5 2969 } else {
7744b5f3 2970 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
c26bf4a5
TG		 2971
2972 /* add protocol-dependent pseudo-header */
7744b5f3 2973 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
c26bf4a5
TG		 2974 datalen + 8, IPPROTO_UDP, csum);
2975
2976 if (udph->check == 0)
2977 udph->check = CSUM_MANGLED_0;
2978 }
2979
a553e4a6
JHS		 2980#ifdef CONFIG_XFRM
2981 if (!process_ipsec(pkt_dev, skb, protocol))
2982 return NULL;
2983#endif
2984
1da177e4
LT		 2985 return skb;
2986}
2987
222f1806
LC		 2988static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2989 struct pktgen_dev *pkt_dev)
1da177e4
LT		 2990{
2991 struct sk_buff *skb = NULL;
2992 __u8 *eth;
2993 struct udphdr *udph;
c26bf4a5 2994 int datalen, udplen;
1da177e4 2995 struct ipv6hdr *iph;
d5f1ce9a 2996 __be16 protocol = htons(ETH_P_IPV6);
ca6549af 2997 __be32 *mpls;
34954ddc
FF		 2998 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2999 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
3000 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
3001 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
fd2ea0a7 3002 u16 queue_map;
ca6549af
SW		 3003
3004 if (pkt_dev->nr_labels)
d5f1ce9a 3005 protocol = htons(ETH_P_MPLS_UC);
64053bee 3006
34954ddc 3007 if (pkt_dev->vlan_id != 0xffff)
d5f1ce9a 3008 protocol = htons(ETH_P_8021Q);
34954ddc 3009
64053bee
RO		 3010 /* Update any of the values, used when we're incrementing various
3011 * fields.
3012 */
3013 mod_cur_headers(pkt_dev);
eb589063 3014 queue_map = pkt_dev->cur_queue_map;
64053bee 3015
63d75463 3016 skb = pktgen_alloc_skb(odev, pkt_dev);
1da177e4
LT		 3017 if (!skb) {
3018 sprintf(pkt_dev->result, "No memory");
3019 return NULL;
3020 }
3021
7a6e288d 3022 prefetchw(skb->data);
1da177e4
LT		 3023 skb_reserve(skb, 16);
3024
3025 /* Reserve for ethernet and IP header */
d58ff351 3026 eth = skb_push(skb, 14);
4df864c1 3027 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
ca6549af
SW		 3028 if (pkt_dev->nr_labels)
3029 mpls_push(mpls, pkt_dev);
34954ddc
FF		 3030
3031 if (pkt_dev->vlan_id != 0xffff) {
e71a4783 3032 if (pkt_dev->svlan_id != 0xffff) {
4df864c1 3033 svlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 3034 *svlan_tci = build_tci(pkt_dev->svlan_id,
3035 pkt_dev->svlan_cfi,
3036 pkt_dev->svlan_p);
4df864c1
JB		 3037 svlan_encapsulated_proto = skb_put(skb,
3038 sizeof(__be16));
d5f1ce9a 3039 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
34954ddc 3040 }
4df864c1 3041 vlan_tci = skb_put(skb, sizeof(__be16));
0f37c605
AV		 3042 *vlan_tci = build_tci(pkt_dev->vlan_id,
3043 pkt_dev->vlan_cfi,
3044 pkt_dev->vlan_p);
4df864c1 3045 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
d5f1ce9a 3046 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
34954ddc
FF		 3047 }
3048
c145aeb3 3049 skb_reset_mac_header(skb);
525cebed 3050 skb_set_network_header(skb, skb->len);
4df864c1 3051 iph = skb_put(skb, sizeof(struct ipv6hdr));
525cebed
TG		 3052
3053 skb_set_transport_header(skb, skb->len);
4df864c1 3054 udph = skb_put(skb, sizeof(struct udphdr));
fd2ea0a7 3055 skb_set_queue_mapping(skb, queue_map);
9e50e3ac 3056 skb->priority = pkt_dev->skb_priority;
1da177e4 3057
1da177e4 3058 memcpy(eth, pkt_dev->hh, 12);
63adc6fb 3059 *(__be16 *) &eth[12] = protocol;
64053bee 3060
ca6549af
SW		 3061 /* Eth + IPh + UDPh + mpls */
3062 datalen = pkt_dev->cur_pkt_size - 14 -
3063 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
16dab72f 3064 pkt_dev->pkt_overhead;
1da177e4 3065
5aa8b572 3066 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
1da177e4 3067 datalen = sizeof(struct pktgen_hdr);
e87cc472 3068 net_info_ratelimited("increased datalen to %d\n", datalen);
1da177e4
LT		 3069 }
3070
c26bf4a5 3071 udplen = datalen + sizeof(struct udphdr);
1da177e4
LT		 3072 udph->source = htons(pkt_dev->cur_udp_src);
3073 udph->dest = htons(pkt_dev->cur_udp_dst);
c26bf4a5
TG		 3074 udph->len = htons(udplen);
3075 udph->check = 0;
1da177e4 3076
d5f1ce9a 3077 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
1da177e4 3078
1ca7768c
FF		 3079 if (pkt_dev->traffic_class) {
3080 /* Version + traffic class + flow (0) */
252e3346 3081 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
1ca7768c
FF		 3082 }
3083
1da177e4
LT		 3084 iph->hop_limit = 32;
3085
c26bf4a5 3086 iph->payload_len = htons(udplen);
1da177e4
LT		 3087 iph->nexthdr = IPPROTO_UDP;
3088
4e3fd7a0
AD		 3089 iph->daddr = pkt_dev->cur_in6_daddr;
3090 iph->saddr = pkt_dev->cur_in6_saddr;
1da177e4 3091
ca6549af 3092 skb->protocol = protocol;
1da177e4
LT		 3093 skb->dev = odev;
3094 skb->pkt_type = PACKET_HOST;
3095
7744b5f3
SD		 3096 pktgen_finalize_skb(pkt_dev, skb, datalen);
3097
c26bf4a5
TG		 3098 if (!(pkt_dev->flags & F_UDPCSUM)) {
3099 skb->ip_summed = CHECKSUM_NONE;
c8cd0989 3100 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
c26bf4a5
TG		 3101 skb->ip_summed = CHECKSUM_PARTIAL;
3102 skb->csum_start = skb_transport_header(skb) - skb->head;
3103 skb->csum_offset = offsetof(struct udphdr, check);
3104 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3105 } else {
7744b5f3 3106 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
c26bf4a5
TG		 3107
3108 /* add protocol-dependent pseudo-header */
3109 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3110
3111 if (udph->check == 0)
3112 udph->check = CSUM_MANGLED_0;
3113 }
3114
1da177e4
LT		 3115 return skb;
3116}
3117
475ac1e4
SH		 3118static struct sk_buff *fill_packet(struct net_device *odev,
3119 struct pktgen_dev *pkt_dev)
1da177e4 3120{
222f1806 3121 if (pkt_dev->flags & F_IPV6)
1da177e4
LT		 3122 return fill_packet_ipv6(odev, pkt_dev);
3123 else
3124 return fill_packet_ipv4(odev, pkt_dev);
3125}
3126
222f1806 3127static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
1da177e4 3128{
222f1806
LC		 3129 pkt_dev->seq_num = 1;
3130 pkt_dev->idle_acc = 0;
1da177e4 3131 pkt_dev->sofar = 0;
222f1806
LC		 3132 pkt_dev->tx_bytes = 0;
3133 pkt_dev->errors = 0;
1da177e4
LT		 3134}
3135
3136/* Set up structure for sending pkts, clear counters */
3137
3138static void pktgen_run(struct pktgen_thread *t)
3139{
c26a8016 3140 struct pktgen_dev *pkt_dev;
1da177e4
LT		 3141 int started = 0;
3142
f9467eae 3143 func_enter();
1da177e4 3144
8788370a
JDB		 3145 rcu_read_lock();
3146 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
1da177e4
LT		 3147
3148 /*
3149 * setup odev and create initial packet.
3150 */
3151 pktgen_setup_inject(pkt_dev);
3152
222f1806 3153 if (pkt_dev->odev) {
1da177e4 3154 pktgen_clear_counters(pkt_dev);
1da177e4 3155 pkt_dev->skb = NULL;
398f382c 3156 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
fd29cf72 3157
16dab72f 3158 set_pkt_overhead(pkt_dev);
222f1806 3159
1da177e4 3160 strcpy(pkt_dev->result, "Starting");
8788370a 3161 pkt_dev->running = 1; /* Cranke yeself! */
1da177e4 3162 started++;
222f1806 3163 } else
1da177e4
LT		 3164 strcpy(pkt_dev->result, "Error starting");
3165 }
8788370a 3166 rcu_read_unlock();
222f1806
LC		 3167 if (started)
3168 t->control &= ~(T_STOP);
1da177e4
LT		 3169}
3170
cda9de0b 3171static void pktgen_handle_all_threads(struct pktgen_net *pn, u32 flags)
1da177e4 3172{
cdcdbe0b 3173 struct pktgen_thread *t;
1da177e4 3174
6146e6a4 3175 mutex_lock(&pktgen_thread_lock);
cdcdbe0b 3176
4e58a027 3177 list_for_each_entry(t, &pn->pktgen_threads, th_list)
cda9de0b 3178 t->control |= (flags);
cdcdbe0b 3179
6146e6a4 3180 mutex_unlock(&pktgen_thread_lock);
1da177e4
LT		 3181}
3182
cda9de0b
YD		 3183static void pktgen_stop_all_threads(struct pktgen_net *pn)
3184{
3185 func_enter();
3186
3187 pktgen_handle_all_threads(pn, T_STOP);
3188}
3189
648fda74 3190static int thread_is_running(const struct pktgen_thread *t)
1da177e4 3191{
648fda74 3192 const struct pktgen_dev *pkt_dev;
1da177e4 3193
8788370a
JDB		 3194 rcu_read_lock();
3195 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3196 if (pkt_dev->running) {
3197 rcu_read_unlock();
648fda74 3198 return 1;
8788370a
JDB		 3199 }
3200 rcu_read_unlock();
648fda74 3201 return 0;
1da177e4
LT		 3202}
3203
222f1806 3204static int pktgen_wait_thread_run(struct pktgen_thread *t)
1da177e4 3205{
222f1806 3206 while (thread_is_running(t)) {
1da177e4 3207
720f1de4
PA		 3208 /* note: 't' will still be around even after the unlock/lock
3209 * cycle because pktgen_thread threads are only cleared at
3210 * net exit
3211 */
3212 mutex_unlock(&pktgen_thread_lock);
222f1806 3213 msleep_interruptible(100);
720f1de4 3214 mutex_lock(&pktgen_thread_lock);
1da177e4 3215
222f1806
LC		 3216 if (signal_pending(current))
3217 goto signal;
222f1806 3218 }
222f1806
LC		 3219 return 1;
3220signal:
3221 return 0;
1da177e4
LT		 3222}
3223
4e58a027 3224static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
1da177e4 3225{
cdcdbe0b 3226 struct pktgen_thread *t;
1da177e4 3227 int sig = 1;
222f1806 3228
720f1de4
PA		 3229 /* prevent from racing with rmmod */
3230 if (!try_module_get(THIS_MODULE))
3231 return sig;
3232
6146e6a4 3233 mutex_lock(&pktgen_thread_lock);
cdcdbe0b 3234
4e58a027 3235 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1da177e4 3236 sig = pktgen_wait_thread_run(t);
222f1806
LC		 3237 if (sig == 0)
3238 break;
1da177e4 3239 }
cdcdbe0b
LC		 3240
3241 if (sig == 0)
4e58a027 3242 list_for_each_entry(t, &pn->pktgen_threads, th_list)
1da177e4 3243 t->control |= (T_STOP);
cdcdbe0b 3244
6146e6a4 3245 mutex_unlock(&pktgen_thread_lock);
720f1de4 3246 module_put(THIS_MODULE);
1da177e4
LT		 3247 return sig;
3248}
3249
4e58a027 3250static void pktgen_run_all_threads(struct pktgen_net *pn)
1da177e4 3251{
f9467eae 3252 func_enter();
1da177e4 3253
cda9de0b 3254 pktgen_handle_all_threads(pn, T_RUN);
1da177e4 3255
63adc6fb
SH		 3256 /* Propagate thread->control */
3257 schedule_timeout_interruptible(msecs_to_jiffies(125));
222f1806 3258
4e58a027 3259 pktgen_wait_all_threads_run(pn);
1da177e4
LT		 3260}
3261
4e58a027 3262static void pktgen_reset_all_threads(struct pktgen_net *pn)
eb37b41c 3263{
f9467eae 3264 func_enter();
eb37b41c 3265
cda9de0b 3266 pktgen_handle_all_threads(pn, T_REMDEVALL);
eb37b41c 3267
63adc6fb
SH		 3268 /* Propagate thread->control */
3269 schedule_timeout_interruptible(msecs_to_jiffies(125));
eb37b41c 3270
4e58a027 3271 pktgen_wait_all_threads_run(pn);
eb37b41c
JB		 3272}
3273
1da177e4
LT		 3274static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3275{
fd29cf72 3276 __u64 bps, mbps, pps;
222f1806 3277 char *p = pkt_dev->result;
fd29cf72
SH		 3278 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3279 pkt_dev->started_at);
3280 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3281
03a14ab1 3282 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
fd29cf72
SH		 3283 (unsigned long long)ktime_to_us(elapsed),
3284 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3285 (unsigned long long)ktime_to_us(idle),
222f1806
LC		 3286 (unsigned long long)pkt_dev->sofar,
3287 pkt_dev->cur_pkt_size, nr_frags);
3288
fd29cf72
SH		 3289 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3290 ktime_to_ns(elapsed));
222f1806 3291
769afb3f
NR		 3292 if (pkt_dev->n_imix_entries > 0) {
3293 int i;
3294 struct imix_pkt *entry;
3295
3296 bps = 0;
3297 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
3298 entry = &pkt_dev->imix_entries[i];
3299 bps += entry->size * entry->count_so_far;
3300 }
3301 bps = div64_u64(bps * 8 * NSEC_PER_SEC, ktime_to_ns(elapsed));
3302 } else {
3303 bps = pps * 8 * pkt_dev->cur_pkt_size;
3304 }
222f1806
LC		 3305
3306 mbps = bps;
3307 do_div(mbps, 1000000);
3308 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3309 (unsigned long long)pps,
3310 (unsigned long long)mbps,
3311 (unsigned long long)bps,
3312 (unsigned long long)pkt_dev->errors);
1da177e4 3313}
1da177e4
LT		 3314
3315/* Set stopped-at timer, remove from running list, do counters & statistics */
222f1806 3316static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
1da177e4 3317{
222f1806 3318 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
95ed63f7 3319
222f1806 3320 if (!pkt_dev->running) {
294a0b7f
JP		 3321 pr_warn("interface: %s is already stopped\n",
3322 pkt_dev->odevname);
222f1806
LC		 3323 return -EINVAL;
3324 }
1da177e4 3325
8788370a 3326 pkt_dev->running = 0;
3bda06a3
SH		 3327 kfree_skb(pkt_dev->skb);
3328 pkt_dev->skb = NULL;
398f382c 3329 pkt_dev->stopped_at = ktime_get();
1da177e4 3330
95ed63f7 3331 show_results(pkt_dev, nr_frags);
1da177e4 3332
222f1806 3333 return 0;
1da177e4
LT		 3334}
3335
222f1806 3336static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
1da177e4 3337{
c26a8016 3338 struct pktgen_dev *pkt_dev, *best = NULL;
222f1806 3339
8788370a
JDB		 3340 rcu_read_lock();
3341 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
c26a8016 3342 if (!pkt_dev->running)
222f1806
LC		 3343 continue;
3344 if (best == NULL)
c26a8016 3345 best = pkt_dev;
398f382c 3346 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
c26a8016 3347 best = pkt_dev;
1da177e4 3348 }
8788370a
JDB		 3349 rcu_read_unlock();
3350
222f1806 3351 return best;
1da177e4
LT		 3352}
3353
222f1806
LC		 3354static void pktgen_stop(struct pktgen_thread *t)
3355{
c26a8016 3356 struct pktgen_dev *pkt_dev;
1da177e4 3357
f9467eae 3358 func_enter();
1da177e4 3359
8788370a 3360 rcu_read_lock();
1da177e4 3361
8788370a 3362 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
c26a8016 3363 pktgen_stop_device(pkt_dev);
95ed63f7 3364 }
1da177e4 3365
8788370a 3366 rcu_read_unlock();
1da177e4
LT		 3367}
3368
95ed63f7
AK		 3369/*
3370 * one of our devices needs to be removed - find it
3371 * and remove it
3372 */
3373static void pktgen_rem_one_if(struct pktgen_thread *t)
3374{
c26a8016
LC		 3375 struct list_head *q, *n;
3376 struct pktgen_dev *cur;
95ed63f7 3377
f9467eae 3378 func_enter();
95ed63f7 3379
c26a8016
LC		 3380 list_for_each_safe(q, n, &t->if_list) {
3381 cur = list_entry(q, struct pktgen_dev, list);
95ed63f7 3382
222f1806
LC		 3383 if (!cur->removal_mark)
3384 continue;
95ed63f7 3385
86dc1ad2 3386 kfree_skb(cur->skb);
95ed63f7
AK		 3387 cur->skb = NULL;
3388
3389 pktgen_remove_device(t, cur);
3390
3391 break;
3392 }
95ed63f7
AK		 3393}
3394
222f1806 3395static void pktgen_rem_all_ifs(struct pktgen_thread *t)
1da177e4 3396{
c26a8016
LC		 3397 struct list_head *q, *n;
3398 struct pktgen_dev *cur;
222f1806 3399
f9467eae
JP		 3400 func_enter();
3401
222f1806 3402 /* Remove all devices, free mem */
95ed63f7 3403
c26a8016
LC		 3404 list_for_each_safe(q, n, &t->if_list) {
3405 cur = list_entry(q, struct pktgen_dev, list);
95ed63f7 3406
86dc1ad2 3407 kfree_skb(cur->skb);
95ed63f7
AK		 3408 cur->skb = NULL;
3409
1da177e4
LT		 3410 pktgen_remove_device(t, cur);
3411 }
1da177e4
LT		 3412}
3413
222f1806 3414static void pktgen_rem_thread(struct pktgen_thread *t)
1da177e4 3415{
222f1806 3416 /* Remove from the thread list */
4e58a027 3417 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
1da177e4
LT		 3418}
3419
ef87979c 3420static void pktgen_resched(struct pktgen_dev *pkt_dev)
3791decb 3421{
398f382c 3422 ktime_t idle_start = ktime_get();
ef87979c 3423 schedule();
398f382c 3424 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
ef87979c 3425}
3791decb 3426
ef87979c
SH		 3427static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3428{
398f382c 3429 ktime_t idle_start = ktime_get();
3791decb 3430
63354797 3431 while (refcount_read(&(pkt_dev->skb->users)) != 1) {
ef87979c
SH		 3432 if (signal_pending(current))
3433 break;
3434
3435 if (need_resched())
3436 pktgen_resched(pkt_dev);
3437 else
3438 cpu_relax();
3439 }
398f382c 3440 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3791decb
SH		 3441}
3442
475ac1e4 3443static void pktgen_xmit(struct pktgen_dev *pkt_dev)
1da177e4 3444{
6aa7de05 3445 unsigned int burst = READ_ONCE(pkt_dev->burst);
00829823 3446 struct net_device *odev = pkt_dev->odev;
fd2ea0a7 3447 struct netdev_queue *txq;
62f64aed 3448 struct sk_buff *skb;
1da177e4
LT		 3449 int ret;
3450
ef87979c
SH		 3451 /* If device is offline, then don't send */
3452 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3453 pktgen_stop_device(pkt_dev);
3454 return;
fd2ea0a7
DM		 3455 }
3456
ef87979c
SH		 3457 /* This is max DELAY, this has special meaning of
3458 * "never transmit"
3459 */
3460 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
398f382c 3461 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3791decb 3462 return;
1da177e4 3463 }
222f1806 3464
ef87979c 3465 /* If no skb or clone count exhausted then get new one */
7d7bb1cf
SH		 3466 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3467 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3468 /* build a new pkt */
3469 kfree_skb(pkt_dev->skb);
3470
3471 pkt_dev->skb = fill_packet(odev, pkt_dev);
3472 if (pkt_dev->skb == NULL) {
f9467eae 3473 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
7d7bb1cf
SH		 3474 schedule();
3475 pkt_dev->clone_count--; /* back out increment, OOM */
3476 return;
1da177e4 3477 }
baac8564 3478 pkt_dev->last_pkt_size = pkt_dev->skb->len;
7d7bb1cf 3479 pkt_dev->clone_count = 0; /* reset counter */
1da177e4 3480 }
95ed63f7 3481
ef87979c
SH		 3482 if (pkt_dev->delay && pkt_dev->last_ok)
3483 spin(pkt_dev, pkt_dev->next_tx);
3484
62f64aed
AS		 3485 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3486 skb = pkt_dev->skb;
3487 skb->protocol = eth_type_trans(skb, skb->dev);
63354797 3488 refcount_add(burst, &skb->users);
62f64aed
AS		 3489 local_bh_disable();
3490 do {
3491 ret = netif_receive_skb(skb);
3492 if (ret == NET_RX_DROP)
3493 pkt_dev->errors++;
3494 pkt_dev->sofar++;
3495 pkt_dev->seq_num++;
63354797 3496 if (refcount_read(&skb->users) != burst) {
62f64aed
AS		 3497 /* skb was queued by rps/rfs or taps,
3498 * so cannot reuse this skb
3499 */
63354797 3500 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
62f64aed
AS		 3501 /* get out of the loop and wait
3502 * until skb is consumed
3503 */
62f64aed
AS		 3504 break;
3505 }
3506 /* skb was 'freed' by stack, so clean few
3507 * bits and reuse it
3508 */
2c64605b 3509 skb_reset_redirect(skb);
62f64aed
AS		 3510 } while (--burst > 0);
3511 goto out; /* Skips xmit_mode M_START_XMIT */
0967f244
JF		 3512 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3513 local_bh_disable();
63354797 3514 refcount_inc(&pkt_dev->skb->users);
0967f244
JF		 3515
3516 ret = dev_queue_xmit(pkt_dev->skb);
3517 switch (ret) {
3518 case NET_XMIT_SUCCESS:
3519 pkt_dev->sofar++;
3520 pkt_dev->seq_num++;
3521 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3522 break;
3523 case NET_XMIT_DROP:
3524 case NET_XMIT_CN:
3525 /* These are all valid return codes for a qdisc but
3526 * indicate packets are being dropped or will likely
3527 * be dropped soon.
3528 */
3529 case NETDEV_TX_BUSY:
3530 /* qdisc may call dev_hard_start_xmit directly in cases
3531 * where no queues exist e.g. loopback device, virtual
3532 * devices, etc. In this case we need to handle
3533 * NETDEV_TX_ codes.
3534 */
3535 default:
3536 pkt_dev->errors++;
3537 net_info_ratelimited("%s xmit error: %d\n",
3538 pkt_dev->odevname, ret);
3539 break;
3540 }
3541 goto out;
62f64aed
AS		 3542 }
3543
10c51b56 3544 txq = skb_get_tx_queue(odev, pkt_dev->skb);
fd2ea0a7 3545
0f2eea4b
DB		 3546 local_bh_disable();
3547
3548 HARD_TX_LOCK(odev, txq, smp_processor_id());
5b8db2f5 3549
6f25cd47 3550 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
0835acfe
ED		 3551 pkt_dev->last_ok = 0;
3552 goto unlock;
3553 }
63354797 3554 refcount_add(burst, &pkt_dev->skb->users);
38b2cf29
AS		 3555
3556xmit_more:
3557 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
ef87979c
SH		 3558
3559 switch (ret) {
3560 case NETDEV_TX_OK:
ef87979c
SH		 3561 pkt_dev->last_ok = 1;
3562 pkt_dev->sofar++;
3563 pkt_dev->seq_num++;
baac8564 3564 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
38b2cf29
AS		 3565 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3566 goto xmit_more;
ef87979c 3567 break;
f466dba1
JF		 3568 case NET_XMIT_DROP:
3569 case NET_XMIT_CN:
f466dba1
JF		 3570 /* skb has been consumed */
3571 pkt_dev->errors++;
3572 break;
ef87979c 3573 default: /* Drivers are not supposed to return other values! */
e87cc472
JP		 3574 net_info_ratelimited("%s xmit error: %d\n",
3575 pkt_dev->odevname, ret);
ef87979c 3576 pkt_dev->errors++;
df561f66 3577 fallthrough;
ef87979c
SH		 3578 case NETDEV_TX_BUSY:
3579 /* Retry it next time */
63354797 3580 refcount_dec(&(pkt_dev->skb->users));
ef87979c 3581 pkt_dev->last_ok = 0;
222f1806 3582 }
38b2cf29 3583 if (unlikely(burst))
63354797 3584 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
0835acfe 3585unlock:
0f2eea4b
DB		 3586 HARD_TX_UNLOCK(odev, txq);
3587
62f64aed 3588out:
0f2eea4b 3589 local_bh_enable();
222f1806 3590
1da177e4
LT		 3591 /* If pkt_dev->count is zero, then run forever */
3592 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
ef87979c 3593 pktgen_wait_for_skb(pkt_dev);
222f1806 3594
1da177e4
LT		 3595 /* Done with this */
3596 pktgen_stop_device(pkt_dev);
222f1806 3597 }
222f1806 3598}
1da177e4 3599
4ec93edb 3600/*
1da177e4
LT		 3601 * Main loop of the thread goes here
3602 */
3603
ee74baa7 3604static int pktgen_thread_worker(void *arg)
1da177e4 3605{
ee74baa7 3606 struct pktgen_thread *t = arg;
222f1806 3607 struct pktgen_dev *pkt_dev = NULL;
1da177e4 3608 int cpu = t->cpu;
1da177e4 3609
275b1e88 3610 WARN_ON(smp_processor_id() != cpu);
1da177e4
LT		 3611
3612 init_waitqueue_head(&t->queue);
d3ede327 3613 complete(&t->start_done);
1da177e4 3614
f9467eae 3615 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
1da177e4 3616
83144186
RW		 3617 set_freezable();
3618
ee74baa7
DM		 3619 while (!kthread_should_stop()) {
3620 pkt_dev = next_to_run(t);
1da177e4 3621
ef87979c 3622 if (unlikely(!pkt_dev && t->control == 0)) {
4e58a027 3623 if (t->net->pktgen_exiting)
551eaff1 3624 break;
ef87979c
SH		 3625 wait_event_interruptible_timeout(t->queue,
3626 t->control != 0,
3627 HZ/10);
1b3f720b 3628 try_to_freeze();
ef87979c 3629 continue;
ee74baa7 3630 }
1da177e4 3631
ef87979c 3632 if (likely(pkt_dev)) {
1da177e4
LT		 3633 pktgen_xmit(pkt_dev);
3634
ef87979c
SH		 3635 if (need_resched())
3636 pktgen_resched(pkt_dev);
3637 else
3638 cpu_relax();
3639 }
3640
222f1806 3641 if (t->control & T_STOP) {
1da177e4
LT		 3642 pktgen_stop(t);
3643 t->control &= ~(T_STOP);
3644 }
3645
222f1806 3646 if (t->control & T_RUN) {
1da177e4
LT		 3647 pktgen_run(t);
3648 t->control &= ~(T_RUN);
3649 }
3650
222f1806 3651 if (t->control & T_REMDEVALL) {
1da177e4 3652 pktgen_rem_all_ifs(t);
95ed63f7
AK		 3653 t->control &= ~(T_REMDEVALL);
3654 }
3655
222f1806 3656 if (t->control & T_REMDEV) {
95ed63f7 3657 pktgen_rem_one_if(t);
1da177e4
LT		 3658 t->control &= ~(T_REMDEV);
3659 }
3660
09fe3ef4 3661 try_to_freeze();
222f1806 3662 }
1da177e4 3663
f9467eae 3664 pr_debug("%s stopping all device\n", t->tsk->comm);
222f1806 3665 pktgen_stop(t);
1da177e4 3666
f9467eae 3667 pr_debug("%s removing all device\n", t->tsk->comm);
222f1806 3668 pktgen_rem_all_ifs(t);
1da177e4 3669
f9467eae 3670 pr_debug("%s removing thread\n", t->tsk->comm);
222f1806 3671 pktgen_rem_thread(t);
cdcdbe0b 3672
ee74baa7 3673 return 0;
1da177e4
LT		 3674}
3675
222f1806 3676static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3e984840 3677 const char *ifname, bool exact)
1da177e4 3678{
c26a8016 3679 struct pktgen_dev *p, *pkt_dev = NULL;
3e984840 3680 size_t len = strlen(ifname);
222f1806 3681
8788370a
JDB		 3682 rcu_read_lock();
3683 list_for_each_entry_rcu(p, &t->if_list, list)
3e984840
ED		 3684 if (strncmp(p->odevname, ifname, len) == 0) {
3685 if (p->odevname[len]) {
3686 if (exact || p->odevname[len] != '@')
3687 continue;
3688 }
c26a8016 3689 pkt_dev = p;
222f1806
LC		 3690 break;
3691 }
222f1806 3692
8788370a 3693 rcu_read_unlock();
f9467eae 3694 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
222f1806 3695 return pkt_dev;
1da177e4
LT		 3696}
3697
4ec93edb
YH		 3698/*
3699 * Adds a dev at front of if_list.
1da177e4
LT		 3700 */
3701
222f1806
LC		 3702static int add_dev_to_thread(struct pktgen_thread *t,
3703 struct pktgen_dev *pkt_dev)
1da177e4
LT		 3704{
3705 int rv = 0;
222f1806 3706
8788370a
JDB		 3707 /* This function cannot be called concurrently, as its called
3708 * under pktgen_thread_lock mutex, but it can run from
3709 * userspace on another CPU than the kthread. The if_lock()
3710 * is used here to sync with concurrent instances of
3711 * _rem_dev_from_if_list() invoked via kthread, which is also
3712 * updating the if_list */
222f1806
LC		 3713 if_lock(t);
3714
3715 if (pkt_dev->pg_thread) {
f9467eae 3716 pr_err("ERROR: already assigned to a thread\n");
222f1806
LC		 3717 rv = -EBUSY;
3718 goto out;
3719 }
c26a8016 3720
1da177e4 3721 pkt_dev->running = 0;
8788370a
JDB		 3722 pkt_dev->pg_thread = t;
3723 list_add_rcu(&pkt_dev->list, &t->if_list);
1da177e4 3724
222f1806
LC		 3725out:
3726 if_unlock(t);
3727 return rv;
1da177e4
LT		 3728}
3729
3730/* Called under thread lock */
3731
222f1806 3732static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
1da177e4 3733{
222f1806 3734 struct pktgen_dev *pkt_dev;
39df232f 3735 int err;
3291b9db 3736 int node = cpu_to_node(t->cpu);
222f1806 3737
1da177e4
LT		 3738 /* We don't allow a device to be on several threads */
3739
4e58a027 3740 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
d50a6b56 3741 if (pkt_dev) {
f9467eae 3742 pr_err("ERROR: interface already used\n");
222f1806
LC		 3743 return -EBUSY;
3744 }
d50a6b56 3745
3291b9db 3746 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
d50a6b56
SH		 3747 if (!pkt_dev)
3748 return -ENOMEM;
3749
593f63b0 3750 strcpy(pkt_dev->odevname, ifname);
fd7beced
KC		 3751 pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
3752 sizeof(struct flow_state)),
3291b9db 3753 node);
d50a6b56
SH		 3754 if (pkt_dev->flows == NULL) {
3755 kfree(pkt_dev);
3756 return -ENOMEM;
3757 }
d50a6b56 3758
95ed63f7 3759 pkt_dev->removal_mark = 0;
d50a6b56 3760 pkt_dev->nfrags = 0;
fd29cf72 3761 pkt_dev->delay = pg_delay_d;
d50a6b56
SH		 3762 pkt_dev->count = pg_count_d;
3763 pkt_dev->sofar = 0;
222f1806 3764 pkt_dev->udp_src_min = 9; /* sink port */
d50a6b56
SH		 3765 pkt_dev->udp_src_max = 9;
3766 pkt_dev->udp_dst_min = 9;
3767 pkt_dev->udp_dst_max = 9;
34954ddc
FF		 3768 pkt_dev->vlan_p = 0;
3769 pkt_dev->vlan_cfi = 0;
3770 pkt_dev->vlan_id = 0xffff;
3771 pkt_dev->svlan_p = 0;
3772 pkt_dev->svlan_cfi = 0;
3773 pkt_dev->svlan_id = 0xffff;
38b2cf29 3774 pkt_dev->burst = 1;
98fa15f3 3775 pkt_dev->node = NUMA_NO_NODE;
34954ddc 3776
4e58a027 3777 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
39df232f
SH		 3778 if (err)
3779 goto out1;
d8873315
NH		 3780 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3781 pkt_dev->clone_skb = pg_clone_skb_d;
d50a6b56 3782
4e58a027 3783 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
97a32539 3784 &pktgen_if_proc_ops, pkt_dev);
39df232f 3785 if (!pkt_dev->entry) {
f9467eae 3786 pr_err("cannot create %s/%s procfs entry\n",
d50a6b56 3787 PG_PROC_DIR, ifname);
39df232f
SH		 3788 err = -EINVAL;
3789 goto out2;
d50a6b56 3790 }
a553e4a6
JHS		 3791#ifdef CONFIG_XFRM
3792 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3793 pkt_dev->ipsproto = IPPROTO_ESP;
cf93d47e
FD		 3794
3795 /* xfrm tunnel mode needs additional dst to extract outter
3796 * ip header protocol/ttl/id field, here creat a phony one.
3797 * instead of looking for a valid rt, which definitely hurting
3798 * performance under such circumstance.
3799 */
3800 pkt_dev->dstops.family = AF_INET;
b6ca8bd5
DM		 3801 pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3802 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3803 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3804 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
a553e4a6 3805#endif
d50a6b56
SH		 3806
3807 return add_dev_to_thread(t, pkt_dev);
39df232f 3808out2:
d62607c3 3809 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
39df232f 3810out1:
a553e4a6
JHS		 3811#ifdef CONFIG_XFRM
3812 free_SAs(pkt_dev);
3813#endif
1d0ebfe7 3814 vfree(pkt_dev->flows);
39df232f
SH		 3815 kfree(pkt_dev);
3816 return err;
1da177e4
LT		 3817}
3818
4e58a027 3819static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
1da177e4 3820{
cdcdbe0b 3821 struct pktgen_thread *t;
d50a6b56 3822 struct proc_dir_entry *pe;
ee74baa7 3823 struct task_struct *p;
222f1806 3824
3291b9db
ED		 3825 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3826 cpu_to_node(cpu));
222f1806 3827 if (!t) {
f9467eae 3828 pr_err("ERROR: out of memory, can't create new thread\n");
222f1806
LC		 3829 return -ENOMEM;
3830 }
3831
9a0b1e8b 3832 mutex_init(&t->if_lock);
1da177e4 3833 t->cpu = cpu;
222f1806 3834
ee74baa7
DM		 3835 INIT_LIST_HEAD(&t->if_list);
3836
4e58a027 3837 list_add_tail(&t->th_list, &pn->pktgen_threads);
d3ede327 3838 init_completion(&t->start_done);
ee74baa7 3839
94dcf29a
ED		 3840 p = kthread_create_on_node(pktgen_thread_worker,
3841 t,
3842 cpu_to_node(cpu),
3843 "kpktgend_%d", cpu);
ee74baa7 3844 if (IS_ERR(p)) {
355db391 3845 pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu);
ee74baa7
DM		 3846 list_del(&t->th_list);
3847 kfree(t);
3848 return PTR_ERR(p);
3849 }
3850 kthread_bind(p, cpu);
3851 t->tsk = p;
3852
4e58a027 3853 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
97a32539 3854 &pktgen_thread_proc_ops, t);
222f1806 3855 if (!pe) {
f9467eae 3856 pr_err("cannot create %s/%s procfs entry\n",
ee74baa7
DM		 3857 PG_PROC_DIR, t->tsk->comm);
3858 kthread_stop(p);
3859 list_del(&t->th_list);
222f1806
LC		 3860 kfree(t);
3861 return -EINVAL;
3862 }
d50a6b56 3863
4e58a027 3864 t->net = pn;
1fbe4b46 3865 get_task_struct(p);
ee74baa7 3866 wake_up_process(p);
d3ede327 3867 wait_for_completion(&t->start_done);
1da177e4
LT		 3868
3869 return 0;
3870}
3871
4ec93edb
YH		 3872/*
3873 * Removes a device from the thread if_list.
1da177e4 3874 */
222f1806
LC		 3875static void _rem_dev_from_if_list(struct pktgen_thread *t,
3876 struct pktgen_dev *pkt_dev)
1da177e4 3877{
c26a8016
LC		 3878 struct list_head *q, *n;
3879 struct pktgen_dev *p;
1da177e4 3880
8788370a 3881 if_lock(t);
c26a8016
LC		 3882 list_for_each_safe(q, n, &t->if_list) {
3883 p = list_entry(q, struct pktgen_dev, list);
3884 if (p == pkt_dev)
8788370a 3885 list_del_rcu(&p->list);
1da177e4 3886 }
8788370a 3887 if_unlock(t);
1da177e4
LT		 3888}
3889
222f1806
LC		 3890static int pktgen_remove_device(struct pktgen_thread *t,
3891 struct pktgen_dev *pkt_dev)
1da177e4 3892{
f9467eae 3893 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
1da177e4 3894
222f1806 3895 if (pkt_dev->running) {
294a0b7f 3896 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
222f1806
LC		 3897 pktgen_stop_device(pkt_dev);
3898 }
3899
3900 /* Dis-associate from the interface */
1da177e4
LT		 3901
3902 if (pkt_dev->odev) {
d62607c3 3903 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
222f1806
LC		 3904 pkt_dev->odev = NULL;
3905 }
3906
8788370a
JDB		 3907 /* Remove proc before if_list entry, because add_device uses
3908 * list to determine if interface already exist, avoid race
3909 * with proc_create_data() */
ef87c5d6 3910 proc_remove(pkt_dev->entry);
1da177e4 3911
8788370a
JDB		 3912 /* And update the thread if_list */
3913 _rem_dev_from_if_list(t, pkt_dev);
3914
a553e4a6
JHS		 3915#ifdef CONFIG_XFRM
3916 free_SAs(pkt_dev);
3917#endif
1d0ebfe7 3918 vfree(pkt_dev->flows);
26ad7879
ED		 3919 if (pkt_dev->page)
3920 put_page(pkt_dev->page);
8788370a 3921 kfree_rcu(pkt_dev, rcu);
222f1806 3922 return 0;
1da177e4
LT		 3923}
3924
4e58a027 3925static int __net_init pg_net_init(struct net *net)
1da177e4 3926{
4e58a027 3927 struct pktgen_net *pn = net_generic(net, pg_net_id);
d50a6b56 3928 struct proc_dir_entry *pe;
4e58a027
CW		 3929 int cpu, ret = 0;
3930
3931 pn->net = net;
3932 INIT_LIST_HEAD(&pn->pktgen_threads);
3933 pn->pktgen_exiting = false;
3934 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3935 if (!pn->proc_dir) {
3936 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
d50a6b56 3937 return -ENODEV;
4e58a027 3938 }
97a32539 3939 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops);
222f1806 3940 if (pe == NULL) {
4e58a027 3941 pr_err("cannot create %s procfs entry\n", PGCTRL);
ce14f894 3942 ret = -EINVAL;
4e58a027 3943 goto remove;
222f1806 3944 }
1da177e4 3945
670c02c2 3946 for_each_online_cpu(cpu) {
8024bb24 3947 int err;
1da177e4 3948
4e58a027 3949 err = pktgen_create_thread(cpu, pn);
8024bb24 3950 if (err)
4e58a027 3951 pr_warn("Cannot create thread for cpu %d (%d)\n",
f9467eae 3952 cpu, err);
222f1806 3953 }
8024bb24 3954
4e58a027
CW		 3955 if (list_empty(&pn->pktgen_threads)) {
3956 pr_err("Initialization failed for all threads\n");
ce14f894 3957 ret = -ENODEV;
4e58a027 3958 goto remove_entry;
8024bb24
LC		 3959 }
3960
222f1806 3961 return 0;
ce14f894 3962
4e58a027
CW		 3963remove_entry:
3964 remove_proc_entry(PGCTRL, pn->proc_dir);
3965remove:
ece31ffd 3966 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
ce14f894 3967 return ret;
1da177e4
LT		 3968}
3969
4e58a027 3970static void __net_exit pg_net_exit(struct net *net)
1da177e4 3971{
4e58a027 3972 struct pktgen_net *pn = net_generic(net, pg_net_id);
cdcdbe0b
LC		 3973 struct pktgen_thread *t;
3974 struct list_head *q, *n;
d4b11335 3975 LIST_HEAD(list);
1da177e4 3976
222f1806 3977 /* Stop all interfaces & threads */
4e58a027 3978 pn->pktgen_exiting = true;
1da177e4 3979
c57b5468 3980 mutex_lock(&pktgen_thread_lock);
4e58a027 3981 list_splice_init(&pn->pktgen_threads, &list);
c57b5468
ED		 3982 mutex_unlock(&pktgen_thread_lock);
3983
3984 list_for_each_safe(q, n, &list) {
cdcdbe0b 3985 t = list_entry(q, struct pktgen_thread, th_list);
c57b5468 3986 list_del(&t->th_list);
ee74baa7 3987 kthread_stop(t->tsk);
1fbe4b46 3988 put_task_struct(t->tsk);
ee74baa7 3989 kfree(t);
222f1806 3990 }
1da177e4 3991
4e58a027 3992 remove_proc_entry(PGCTRL, pn->proc_dir);
ece31ffd 3993 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
4e58a027
CW		 3994}
3995
3996static struct pernet_operations pg_net_ops = {
3997 .init = pg_net_init,
3998 .exit = pg_net_exit,
3999 .id = &pg_net_id,
4000 .size = sizeof(struct pktgen_net),
4001};
4002
4003static int __init pg_init(void)
4004{
4005 int ret = 0;
1da177e4 4006
4e58a027
CW		 4007 pr_info("%s", version);
4008 ret = register_pernet_subsys(&pg_net_ops);
4009 if (ret)
4010 return ret;
4011 ret = register_netdevice_notifier(&pktgen_notifier_block);
4012 if (ret)
4013 unregister_pernet_subsys(&pg_net_ops);
4014
4015 return ret;
4016}
4017
4018static void __exit pg_cleanup(void)
4019{
4020 unregister_netdevice_notifier(&pktgen_notifier_block);
4021 unregister_pernet_subsys(&pg_net_ops);
8788370a 4022 /* Don't need rcu_barrier() due to use of kfree_rcu() */
1da177e4
LT		 4023}
4024
1da177e4
LT		 4025module_init(pg_init);
4026module_exit(pg_cleanup);
4027
c3d2f52d 4028MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
1da177e4
LT		 4029MODULE_DESCRIPTION("Packet Generator tool");
4030MODULE_LICENSE("GPL");
c3d2f52d 4031MODULE_VERSION(VERSION);
1da177e4 4032module_param(pg_count_d, int, 0);
c3d2f52d 4033MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
1da177e4 4034module_param(pg_delay_d, int, 0);
c3d2f52d 4035MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
1da177e4 4036module_param(pg_clone_skb_d, int, 0);
c3d2f52d 4037MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
1da177e4 4038module_param(debug, int, 0);
c3d2f52d 4039MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux 6.x block layer and io_uring tree(s)