pktgen.c 93.0 KB
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/*
 * Authors:
 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
 *                             Uppsala University and
 *                             Swedish University of Agricultural Sciences
 *
 * Alexey Kuznetsov  <kuznet@ms2.inr.ac.ru>
 * Ben Greear <greearb@candelatech.com>
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 * Jens Låås <jens.laas@data.slu.se>
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 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 *
 * A tool for loading the network with preconfigurated packets.
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 * The tool is implemented as a linux module.  Parameters are output
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 * device, delay (to hard_xmit), number of packets, and whether
 * to use multiple SKBs or just the same one.
 * pktgen uses the installed interface's output routine.
 *
 * Additional hacking by:
 *
 * Jens.Laas@data.slu.se
 * Improved by ANK. 010120.
 * Improved by ANK even more. 010212.
 * MAC address typo fixed. 010417 --ro
 * Integrated.  020301 --DaveM
 * Added multiskb option 020301 --DaveM
 * Scaling of results. 020417--sigurdur@linpro.no
 * Significant re-work of the module:
 *   *  Convert to threaded model to more efficiently be able to transmit
 *       and receive on multiple interfaces at once.
 *   *  Converted many counters to __u64 to allow longer runs.
 *   *  Allow configuration of ranges, like min/max IP address, MACs,
 *       and UDP-ports, for both source and destination, and can
 *       set to use a random distribution or sequentially walk the range.
 *   *  Can now change most values after starting.
 *   *  Place 12-byte packet in UDP payload with magic number,
 *       sequence number, and timestamp.
 *   *  Add receiver code that detects dropped pkts, re-ordered pkts, and
 *       latencies (with micro-second) precision.
 *   *  Add IOCTL interface to easily get counters & configuration.
 *   --Ben Greear <greearb@candelatech.com>
 *
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 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
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 * as a "fastpath" with a configurable number of clones after alloc's.
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 * clone_skb=0 means all packets are allocated this also means ranges time
 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
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 * clones.
 *
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 * Also moved to /proc/net/pktgen/
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 * --ro
 *
 * Sept 10:  Fixed threading/locking.  Lots of bone-headed and more clever
 *    mistakes.  Also merged in DaveM's patch in the -pre6 patch.
 * --Ben Greear <greearb@candelatech.com>
 *
 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
 *
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 *
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 * 021124 Finished major redesign and rewrite for new functionality.
 * See Documentation/networking/pktgen.txt for how to use this.
 *
 * The new operation:
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 * For each CPU one thread/process is created at start. This process checks
 * for running devices in the if_list and sends packets until count is 0 it
 * also the thread checks the thread->control which is used for inter-process
 * communication. controlling process "posts" operations to the threads this
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 * way. The if_lock should be possible to remove when add/rem_device is merged
 * into this too.
 *
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 * By design there should only be *one* "controlling" process. In practice
 * multiple write accesses gives unpredictable result. Understood by "write"
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 * to /proc gives result code thats should be read be the "writer".
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 * For practical use this should be no problem.
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 *
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 * Note when adding devices to a specific CPU there good idea to also assign
 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
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 * --ro
 *
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 * Fix refcount off by one if first packet fails, potential null deref,
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 * memleak 030710- KJP
 *
 * First "ranges" functionality for ipv6 030726 --ro
 *
 * Included flow support. 030802 ANK.
 *
 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
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 *
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 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
 * ia64 compilation fix from  Aron Griffis <aron@hp.com> 040604
 *
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 * New xmit() return, do_div and misc clean up by Stephen Hemminger
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 * <shemminger@osdl.org> 040923
 *
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 * Randy Dunlap fixed u64 printk compiler waring
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 *
 * Remove FCS from BW calculation.  Lennert Buytenhek <buytenh@wantstofly.org>
 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
 *
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 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
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 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
 *
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 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
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 * 050103
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 *
 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
 *
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 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
 *
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 * Fixed src_mac command to set source mac of packet to value specified in
 * command by Adit Ranadive <adit.262@gmail.com>
 *
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 */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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#include <linux/sys.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/unistd.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
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#include <linux/capability.h>
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#include <linux/hrtimer.h>
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#include <linux/freezer.h>
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#include <linux/delay.h>
#include <linux/timer.h>
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#include <linux/list.h>
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#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/inet.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_arp.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/wait.h>
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#include <linux/etherdevice.h>
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#include <linux/kthread.h>
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#include <linux/prefetch.h>
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#include <net/net_namespace.h>
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#include <net/checksum.h>
#include <net/ipv6.h>
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#include <net/udp.h>
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#include <net/ip6_checksum.h>
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#include <net/addrconf.h>
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#ifdef CONFIG_XFRM
#include <net/xfrm.h>
#endif
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#include <net/netns/generic.h>
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#include <asm/byteorder.h>
#include <linux/rcupdate.h>
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#include <linux/bitops.h>
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#include <linux/io.h>
#include <linux/timex.h>
#include <linux/uaccess.h>
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#include <asm/dma.h>
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#include <asm/div64.h>		/* do_div */
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#define VERSION	"2.74"
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#define IP_NAME_SZ 32
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#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
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#define MPLS_STACK_BOTTOM htonl(0x00000100)
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#define func_enter() pr_debug("entering %s\n", __func__);

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/* Device flag bits */
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#define F_IPSRC_RND   (1<<0)	/* IP-Src Random  */
#define F_IPDST_RND   (1<<1)	/* IP-Dst Random  */
#define F_UDPSRC_RND  (1<<2)	/* UDP-Src Random */
#define F_UDPDST_RND  (1<<3)	/* UDP-Dst Random */
#define F_MACSRC_RND  (1<<4)	/* MAC-Src Random */
#define F_MACDST_RND  (1<<5)	/* MAC-Dst Random */
#define F_TXSIZE_RND  (1<<6)	/* Transmit size is random */
#define F_IPV6        (1<<7)	/* Interface in IPV6 Mode */
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#define F_MPLS_RND    (1<<8)	/* Random MPLS labels */
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#define F_VID_RND     (1<<9)	/* Random VLAN ID */
#define F_SVID_RND    (1<<10)	/* Random SVLAN ID */
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#define F_FLOW_SEQ    (1<<11)	/* Sequential flows */
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#define F_IPSEC_ON    (1<<12)	/* ipsec on for flows */
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#define F_QUEUE_MAP_RND (1<<13)	/* queue map Random */
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#define F_QUEUE_MAP_CPU (1<<14)	/* queue map mirrors smp_processor_id() */
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#define F_NODE          (1<<15)	/* Node memory alloc*/
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#define F_UDPCSUM       (1<<16)	/* Include UDP checksum */
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/* Thread control flag bits */
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#define T_STOP        (1<<0)	/* Stop run */
#define T_RUN         (1<<1)	/* Start run */
#define T_REMDEVALL   (1<<2)	/* Remove all devs */
#define T_REMDEV      (1<<3)	/* Remove one dev */
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/* If lock -- can be removed after some work */
#define   if_lock(t)           spin_lock(&(t->if_lock));
#define   if_unlock(t)           spin_unlock(&(t->if_lock));

/* Used to help with determining the pkts on receive */
#define PKTGEN_MAGIC 0xbe9be955
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#define PG_PROC_DIR "pktgen"
#define PGCTRL	    "pgctrl"
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#define MAX_CFLOWS  65536

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#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)

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struct flow_state {
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	__be32 cur_daddr;
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	int count;
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#ifdef CONFIG_XFRM
	struct xfrm_state *x;
#endif
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	__u32 flags;
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};

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/* flow flag bits */
#define F_INIT   (1<<0)		/* flow has been initialized */

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struct pktgen_dev {
	/*
	 * Try to keep frequent/infrequent used vars. separated.
	 */
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	struct proc_dir_entry *entry;	/* proc file */
	struct pktgen_thread *pg_thread;/* the owner */
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	struct list_head list;		/* chaining in the thread's run-queue */
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	int running;		/* if false, the test will stop */
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	/* If min != max, then we will either do a linear iteration, or
	 * we will do a random selection from within the range.
	 */
	__u32 flags;
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	int removal_mark;	/* non-zero => the device is marked for
				 * removal by worker thread */
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	int min_pkt_size;
	int max_pkt_size;
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	int pkt_overhead;	/* overhead for MPLS, VLANs, IPSEC etc */
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	int nfrags;
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	struct page *page;
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	u64 delay;		/* nano-seconds */

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	__u64 count;		/* Default No packets to send */
	__u64 sofar;		/* How many pkts we've sent so far */
	__u64 tx_bytes;		/* How many bytes we've transmitted */
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	__u64 errors;		/* Errors when trying to transmit, */
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	/* runtime counters relating to clone_skb */

	__u64 allocated_skbs;
	__u32 clone_count;
	int last_ok;		/* Was last skb sent?
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				 * Or a failed transmit of some sort?
				 * This will keep sequence numbers in order
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				 */
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	ktime_t next_tx;
	ktime_t started_at;
	ktime_t stopped_at;
	u64	idle_acc;	/* nano-seconds */

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	__u32 seq_num;

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	int clone_skb;		/*
				 * Use multiple SKBs during packet gen.
				 * If this number is greater than 1, then
				 * that many copies of the same packet will be
				 * sent before a new packet is allocated.
				 * If you want to send 1024 identical packets
				 * before creating a new packet,
				 * set clone_skb to 1024.
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				 */

	char dst_min[IP_NAME_SZ];	/* IP, ie 1.2.3.4 */
	char dst_max[IP_NAME_SZ];	/* IP, ie 1.2.3.4 */
	char src_min[IP_NAME_SZ];	/* IP, ie 1.2.3.4 */
	char src_max[IP_NAME_SZ];	/* IP, ie 1.2.3.4 */

	struct in6_addr in6_saddr;
	struct in6_addr in6_daddr;
	struct in6_addr cur_in6_daddr;
	struct in6_addr cur_in6_saddr;
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	/* For ranges */
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	struct in6_addr min_in6_daddr;
	struct in6_addr max_in6_daddr;
	struct in6_addr min_in6_saddr;
	struct in6_addr max_in6_saddr;

	/* If we're doing ranges, random or incremental, then this
	 * defines the min/max for those ranges.
	 */
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	__be32 saddr_min;	/* inclusive, source IP address */
	__be32 saddr_max;	/* exclusive, source IP address */
	__be32 daddr_min;	/* inclusive, dest IP address */
	__be32 daddr_max;	/* exclusive, dest IP address */
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	__u16 udp_src_min;	/* inclusive, source UDP port */
	__u16 udp_src_max;	/* exclusive, source UDP port */
	__u16 udp_dst_min;	/* inclusive, dest UDP port */
	__u16 udp_dst_max;	/* exclusive, dest UDP port */

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	/* DSCP + ECN */
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	__u8 tos;            /* six MSB of (former) IPv4 TOS
				are for dscp codepoint */
	__u8 traffic_class;  /* ditto for the (former) Traffic Class in IPv6
				(see RFC 3260, sec. 4) */
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	/* MPLS */
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	unsigned int nr_labels;	/* Depth of stack, 0 = no MPLS */
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	__be32 labels[MAX_MPLS_LABELS];

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	/* VLAN/SVLAN (802.1Q/Q-in-Q) */
	__u8  vlan_p;
	__u8  vlan_cfi;
	__u16 vlan_id;  /* 0xffff means no vlan tag */

	__u8  svlan_p;
	__u8  svlan_cfi;
	__u16 svlan_id; /* 0xffff means no svlan tag */

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	__u32 src_mac_count;	/* How many MACs to iterate through */
	__u32 dst_mac_count;	/* How many MACs to iterate through */

	unsigned char dst_mac[ETH_ALEN];
	unsigned char src_mac[ETH_ALEN];

	__u32 cur_dst_mac_offset;
	__u32 cur_src_mac_offset;
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	__be32 cur_saddr;
	__be32 cur_daddr;
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	__u16 ip_id;
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	__u16 cur_udp_dst;
	__u16 cur_udp_src;
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	__u16 cur_queue_map;
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	__u32 cur_pkt_size;
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	__u32 last_pkt_size;
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	__u8 hh[14];
	/* = {
	   0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,

	   We fill in SRC address later
	   0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	   0x08, 0x00
	   };
	 */
	__u16 pad;		/* pad out the hh struct to an even 16 bytes */

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	struct sk_buff *skb;	/* skb we are to transmit next, used for when we
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				 * are transmitting the same one multiple times
				 */
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	struct net_device *odev; /* The out-going device.
				  * Note that the device should have it's
				  * pg_info pointer pointing back to this
				  * device.
				  * Set when the user specifies the out-going
				  * device name (not when the inject is
				  * started as it used to do.)
				  */
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	char odevname[32];
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	struct flow_state *flows;
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	unsigned int cflows;	/* Concurrent flows (config) */
	unsigned int lflow;		/* Flow length  (config) */
	unsigned int nflows;	/* accumulated flows (stats) */
	unsigned int curfl;		/* current sequenced flow (state)*/
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	u16 queue_map_min;
	u16 queue_map_max;
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	__u32 skb_priority;	/* skb priority field */
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	int node;               /* Memory node */
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#ifdef CONFIG_XFRM
	__u8	ipsmode;		/* IPSEC mode (config) */
	__u8	ipsproto;		/* IPSEC type (config) */
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	__u32	spi;
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	struct dst_entry dst;
	struct dst_ops dstops;
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#endif
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	char result[512];
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};

struct pktgen_hdr {
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	__be32 pgh_magic;
	__be32 seq_num;
	__be32 tv_sec;
	__be32 tv_usec;
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};

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static int pg_net_id __read_mostly;

struct pktgen_net {
	struct net		*net;
	struct proc_dir_entry	*proc_dir;
	struct list_head	pktgen_threads;
	bool			pktgen_exiting;
};
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struct pktgen_thread {
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	spinlock_t if_lock;		/* for list of devices */
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	struct list_head if_list;	/* All device here */
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	struct list_head th_list;
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	struct task_struct *tsk;
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	char result[512];

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	/* Field for thread to receive "posted" events terminate,
	   stop ifs etc. */
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	u32 control;
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	int cpu;

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	wait_queue_head_t queue;
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	struct completion start_done;
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	struct pktgen_net *net;
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};

#define REMOVE 1
#define FIND   0

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static const char version[] =
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	"Packet Generator for packet performance testing. "
	"Version: " VERSION "\n";
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static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
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					  const char *ifname, bool exact);
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static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
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static void pktgen_run_all_threads(struct pktgen_net *pn);
static void pktgen_reset_all_threads(struct pktgen_net *pn);
static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
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static void pktgen_stop(struct pktgen_thread *t);
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static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
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/* Module parameters, defaults. */
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static int pg_count_d __read_mostly = 1000;
static int pg_delay_d __read_mostly;
static int pg_clone_skb_d  __read_mostly;
static int debug  __read_mostly;
L
Linus Torvalds 已提交
458

459
static DEFINE_MUTEX(pktgen_thread_lock);
L
Linus Torvalds 已提交
460 461 462 463 464 465

static struct notifier_block pktgen_notifier_block = {
	.notifier_call = pktgen_device_event,
};

/*
466
 * /proc handling functions
L
Linus Torvalds 已提交
467 468 469
 *
 */

470
static int pgctrl_show(struct seq_file *seq, void *v)
L
Luiz Capitulino 已提交
471
{
S
Stephen Hemminger 已提交
472
	seq_puts(seq, version);
473
	return 0;
L
Linus Torvalds 已提交
474 475
}

476 477
static ssize_t pgctrl_write(struct file *file, const char __user *buf,
			    size_t count, loff_t *ppos)
L
Linus Torvalds 已提交
478 479
{
	int err = 0;
480
	char data[128];
C
Cong Wang 已提交
481
	struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
L
Linus Torvalds 已提交
482

L
Luiz Capitulino 已提交
483 484
	if (!capable(CAP_NET_ADMIN)) {
		err = -EPERM;
L
Linus Torvalds 已提交
485
		goto out;
L
Luiz Capitulino 已提交
486
	}
L
Linus Torvalds 已提交
487

488 489
	if (count > sizeof(data))
		count = sizeof(data);
L
Linus Torvalds 已提交
490 491

	if (copy_from_user(data, buf, count)) {
492
		err = -EFAULT;
493
		goto out;
L
Luiz Capitulino 已提交
494 495
	}
	data[count - 1] = 0;	/* Make string */
L
Linus Torvalds 已提交
496

L
Luiz Capitulino 已提交
497
	if (!strcmp(data, "stop"))
C
Cong Wang 已提交
498
		pktgen_stop_all_threads_ifs(pn);
L
Linus Torvalds 已提交
499

L
Luiz Capitulino 已提交
500
	else if (!strcmp(data, "start"))
C
Cong Wang 已提交
501
		pktgen_run_all_threads(pn);
L
Linus Torvalds 已提交
502

503
	else if (!strcmp(data, "reset"))
C
Cong Wang 已提交
504
		pktgen_reset_all_threads(pn);
505

L
Luiz Capitulino 已提交
506
	else
J
Joe Perches 已提交
507
		pr_warning("Unknown command: %s\n", data);
L
Linus Torvalds 已提交
508 509 510

	err = count;

L
Luiz Capitulino 已提交
511 512
out:
	return err;
L
Linus Torvalds 已提交
513 514
}

515 516
static int pgctrl_open(struct inode *inode, struct file *file)
{
A
Al Viro 已提交
517
	return single_open(file, pgctrl_show, PDE_DATA(inode));
518 519
}

520
static const struct file_operations pktgen_fops = {
L
Luiz Capitulino 已提交
521 522 523 524 525 526
	.owner   = THIS_MODULE,
	.open    = pgctrl_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.write   = pgctrl_write,
	.release = single_release,
527 528 529
};

static int pktgen_if_show(struct seq_file *seq, void *v)
L
Linus Torvalds 已提交
530
{
S
Stephen Hemminger 已提交
531
	const struct pktgen_dev *pkt_dev = seq->private;
532 533
	ktime_t stopped;
	u64 idle;
L
Luiz Capitulino 已提交
534 535 536 537 538 539 540

	seq_printf(seq,
		   "Params: count %llu  min_pkt_size: %u  max_pkt_size: %u\n",
		   (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
		   pkt_dev->max_pkt_size);

	seq_printf(seq,
541 542
		   "     frags: %d  delay: %llu  clone_skb: %d  ifname: %s\n",
		   pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
E
Eric Dumazet 已提交
543
		   pkt_dev->clone_skb, pkt_dev->odevname);
L
Luiz Capitulino 已提交
544 545 546 547

	seq_printf(seq, "     flows: %u flowlen: %u\n", pkt_dev->cflows,
		   pkt_dev->lflow);

R
Robert Olsson 已提交
548 549 550 551 552
	seq_printf(seq,
		   "     queue_map_min: %u  queue_map_max: %u\n",
		   pkt_dev->queue_map_min,
		   pkt_dev->queue_map_max);

J
John Fastabend 已提交
553 554 555 556
	if (pkt_dev->skb_priority)
		seq_printf(seq, "     skb_priority: %u\n",
			   pkt_dev->skb_priority);

L
Luiz Capitulino 已提交
557 558
	if (pkt_dev->flags & F_IPV6) {
		seq_printf(seq,
559 560 561 562 563 564
			   "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
			   "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
			   &pkt_dev->in6_saddr,
			   &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
			   &pkt_dev->in6_daddr,
			   &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
565 566 567 568
	} else {
		seq_printf(seq,
			   "     dst_min: %s  dst_max: %s\n",
			   pkt_dev->dst_min, pkt_dev->dst_max);
L
Luiz Capitulino 已提交
569
		seq_printf(seq,
570 571 572
			   "        src_min: %s  src_max: %s\n",
			   pkt_dev->src_min, pkt_dev->src_max);
	}
L
Linus Torvalds 已提交
573

L
Luiz Capitulino 已提交
574
	seq_puts(seq, "     src_mac: ");
L
Linus Torvalds 已提交
575

J
Johannes Berg 已提交
576 577 578
	seq_printf(seq, "%pM ",
		   is_zero_ether_addr(pkt_dev->src_mac) ?
			     pkt_dev->odev->dev_addr : pkt_dev->src_mac);
L
Luiz Capitulino 已提交
579 580

	seq_printf(seq, "dst_mac: ");
J
Johannes Berg 已提交
581
	seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
L
Luiz Capitulino 已提交
582 583

	seq_printf(seq,
584 585
		   "     udp_src_min: %d  udp_src_max: %d"
		   "  udp_dst_min: %d  udp_dst_max: %d\n",
L
Luiz Capitulino 已提交
586 587 588 589
		   pkt_dev->udp_src_min, pkt_dev->udp_src_max,
		   pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);

	seq_printf(seq,
590
		   "     src_mac_count: %d  dst_mac_count: %d\n",
L
Luiz Capitulino 已提交
591
		   pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
L
Linus Torvalds 已提交
592

593
	if (pkt_dev->nr_labels) {
594
		unsigned int i;
595
		seq_printf(seq, "     mpls: ");
596
		for (i = 0; i < pkt_dev->nr_labels; i++)
597 598 599 600
			seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
				   i == pkt_dev->nr_labels-1 ? "\n" : ", ");
	}

601
	if (pkt_dev->vlan_id != 0xffff)
F
Francesco Fondelli 已提交
602
		seq_printf(seq, "     vlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
603 604
			   pkt_dev->vlan_id, pkt_dev->vlan_p,
			   pkt_dev->vlan_cfi);
F
Francesco Fondelli 已提交
605

606
	if (pkt_dev->svlan_id != 0xffff)
F
Francesco Fondelli 已提交
607
		seq_printf(seq, "     svlan_id: %u  vlan_p: %u  vlan_cfi: %u\n",
608 609
			   pkt_dev->svlan_id, pkt_dev->svlan_p,
			   pkt_dev->svlan_cfi);
F
Francesco Fondelli 已提交
610

611
	if (pkt_dev->tos)
F
Francesco Fondelli 已提交
612 613
		seq_printf(seq, "     tos: 0x%02x\n", pkt_dev->tos);

614
	if (pkt_dev->traffic_class)
F
Francesco Fondelli 已提交
615 616
		seq_printf(seq, "     traffic_class: 0x%02x\n", pkt_dev->traffic_class);

R
Robert Olsson 已提交
617 618 619
	if (pkt_dev->node >= 0)
		seq_printf(seq, "     node: %d\n", pkt_dev->node);

620 621
	seq_printf(seq, "     Flags: ");

L
Luiz Capitulino 已提交
622 623
	if (pkt_dev->flags & F_IPV6)
		seq_printf(seq, "IPV6  ");
L
Linus Torvalds 已提交
624

L
Luiz Capitulino 已提交
625 626
	if (pkt_dev->flags & F_IPSRC_RND)
		seq_printf(seq, "IPSRC_RND  ");
L
Linus Torvalds 已提交
627

L
Luiz Capitulino 已提交
628 629
	if (pkt_dev->flags & F_IPDST_RND)
		seq_printf(seq, "IPDST_RND  ");
L
Linus Torvalds 已提交
630

L
Luiz Capitulino 已提交
631 632
	if (pkt_dev->flags & F_TXSIZE_RND)
		seq_printf(seq, "TXSIZE_RND  ");
L
Linus Torvalds 已提交
633

L
Luiz Capitulino 已提交
634 635
	if (pkt_dev->flags & F_UDPSRC_RND)
		seq_printf(seq, "UDPSRC_RND  ");
L
Linus Torvalds 已提交
636

L
Luiz Capitulino 已提交
637 638
	if (pkt_dev->flags & F_UDPDST_RND)
		seq_printf(seq, "UDPDST_RND  ");
L
Linus Torvalds 已提交
639

640 641 642
	if (pkt_dev->flags & F_UDPCSUM)
		seq_printf(seq, "UDPCSUM  ");

643 644 645
	if (pkt_dev->flags & F_MPLS_RND)
		seq_printf(seq,  "MPLS_RND  ");

R
Robert Olsson 已提交
646 647 648
	if (pkt_dev->flags & F_QUEUE_MAP_RND)
		seq_printf(seq,  "QUEUE_MAP_RND  ");

R
Robert Olsson 已提交
649 650 651
	if (pkt_dev->flags & F_QUEUE_MAP_CPU)
		seq_printf(seq,  "QUEUE_MAP_CPU  ");

652 653 654 655 656 657 658
	if (pkt_dev->cflows) {
		if (pkt_dev->flags & F_FLOW_SEQ)
			seq_printf(seq,  "FLOW_SEQ  "); /*in sequence flows*/
		else
			seq_printf(seq,  "FLOW_RND  ");
	}

J
Jamal Hadi Salim 已提交
659
#ifdef CONFIG_XFRM
660
	if (pkt_dev->flags & F_IPSEC_ON) {
J
Jamal Hadi Salim 已提交
661
		seq_printf(seq,  "IPSEC  ");
662 663 664
		if (pkt_dev->spi)
			seq_printf(seq, "spi:%u", pkt_dev->spi);
	}
J
Jamal Hadi Salim 已提交
665 666
#endif

L
Luiz Capitulino 已提交
667 668
	if (pkt_dev->flags & F_MACSRC_RND)
		seq_printf(seq, "MACSRC_RND  ");
L
Linus Torvalds 已提交
669

L
Luiz Capitulino 已提交
670 671
	if (pkt_dev->flags & F_MACDST_RND)
		seq_printf(seq, "MACDST_RND  ");
L
Linus Torvalds 已提交
672

F
Francesco Fondelli 已提交
673 674 675 676 677 678
	if (pkt_dev->flags & F_VID_RND)
		seq_printf(seq, "VID_RND  ");

	if (pkt_dev->flags & F_SVID_RND)
		seq_printf(seq, "SVID_RND  ");

R
Robert Olsson 已提交
679 680 681
	if (pkt_dev->flags & F_NODE)
		seq_printf(seq, "NODE_ALLOC  ");

L
Luiz Capitulino 已提交
682 683
	seq_puts(seq, "\n");

684
	/* not really stopped, more like last-running-at */
D
Daniel Borkmann 已提交
685
	stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
686 687
	idle = pkt_dev->idle_acc;
	do_div(idle, NSEC_PER_USEC);
L
Linus Torvalds 已提交
688

L
Luiz Capitulino 已提交
689
	seq_printf(seq,
690
		   "Current:\n     pkts-sofar: %llu  errors: %llu\n",
L
Luiz Capitulino 已提交
691
		   (unsigned long long)pkt_dev->sofar,
692 693 694 695 696 697 698
		   (unsigned long long)pkt_dev->errors);

	seq_printf(seq,
		   "     started: %lluus  stopped: %lluus idle: %lluus\n",
		   (unsigned long long) ktime_to_us(pkt_dev->started_at),
		   (unsigned long long) ktime_to_us(stopped),
		   (unsigned long long) idle);
L
Linus Torvalds 已提交
699

L
Luiz Capitulino 已提交
700 701
	seq_printf(seq,
		   "     seq_num: %d  cur_dst_mac_offset: %d  cur_src_mac_offset: %d\n",
702 703
		   pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
		   pkt_dev->cur_src_mac_offset);
L
Linus Torvalds 已提交
704

L
Luiz Capitulino 已提交
705
	if (pkt_dev->flags & F_IPV6) {
706 707 708
		seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
				&pkt_dev->cur_in6_saddr,
				&pkt_dev->cur_in6_daddr);
L
Luiz Capitulino 已提交
709
	} else
710 711
		seq_printf(seq, "     cur_saddr: %pI4  cur_daddr: %pI4\n",
			   &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
L
Linus Torvalds 已提交
712

L
Luiz Capitulino 已提交
713
	seq_printf(seq, "     cur_udp_dst: %d  cur_udp_src: %d\n",
714
		   pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
L
Linus Torvalds 已提交
715

R
Robert Olsson 已提交
716 717
	seq_printf(seq, "     cur_queue_map: %u\n", pkt_dev->cur_queue_map);

L
Luiz Capitulino 已提交
718
	seq_printf(seq, "     flows: %u\n", pkt_dev->nflows);
L
Linus Torvalds 已提交
719 720

	if (pkt_dev->result[0])
L
Luiz Capitulino 已提交
721
		seq_printf(seq, "Result: %s\n", pkt_dev->result);
L
Linus Torvalds 已提交
722
	else
L
Luiz Capitulino 已提交
723
		seq_printf(seq, "Result: Idle\n");
L
Linus Torvalds 已提交
724

725
	return 0;
L
Linus Torvalds 已提交
726 727
}

728

729 730
static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
		     __u32 *num)
731 732 733 734
{
	int i = 0;
	*num = 0;

735
	for (; i < maxlen; i++) {
736
		int value;
737 738 739 740
		char c;
		*num <<= 4;
		if (get_user(c, &user_buffer[i]))
			return -EFAULT;
741 742 743
		value = hex_to_bin(c);
		if (value >= 0)
			*num |= value;
744 745 746 747 748 749
		else
			break;
	}
	return i;
}

L
Luiz Capitulino 已提交
750 751
static int count_trail_chars(const char __user * user_buffer,
			     unsigned int maxlen)
L
Linus Torvalds 已提交
752 753 754 755
{
	int i;

	for (i = 0; i < maxlen; i++) {
L
Luiz Capitulino 已提交
756 757 758 759
		char c;
		if (get_user(c, &user_buffer[i]))
			return -EFAULT;
		switch (c) {
L
Linus Torvalds 已提交
760 761 762 763 764 765 766 767 768
		case '\"':
		case '\n':
		case '\r':
		case '\t':
		case ' ':
		case '=':
			break;
		default:
			goto done;
769
		}
L
Linus Torvalds 已提交
770 771 772 773 774
	}
done:
	return i;
}

775 776
static long num_arg(const char __user *user_buffer, unsigned long maxlen,
				unsigned long *num)
L
Linus Torvalds 已提交
777
{
778
	int i;
L
Linus Torvalds 已提交
779
	*num = 0;
L
Luiz Capitulino 已提交
780

781
	for (i = 0; i < maxlen; i++) {
L
Luiz Capitulino 已提交
782 783 784 785
		char c;
		if (get_user(c, &user_buffer[i]))
			return -EFAULT;
		if ((c >= '0') && (c <= '9')) {
L
Linus Torvalds 已提交
786
			*num *= 10;
L
Luiz Capitulino 已提交
787
			*num += c - '0';
L
Linus Torvalds 已提交
788 789 790 791 792 793
		} else
			break;
	}
	return i;
}

L
Luiz Capitulino 已提交
794
static int strn_len(const char __user * user_buffer, unsigned int maxlen)
L
Linus Torvalds 已提交
795
{
796
	int i;
L
Linus Torvalds 已提交
797

798
	for (i = 0; i < maxlen; i++) {
L
Luiz Capitulino 已提交
799 800 801 802
		char c;
		if (get_user(c, &user_buffer[i]))
			return -EFAULT;
		switch (c) {
L
Linus Torvalds 已提交
803 804 805 806 807 808 809 810 811
		case '\"':
		case '\n':
		case '\r':
		case '\t':
		case ' ':
			goto done_str;
			break;
		default:
			break;
812
		}
L
Linus Torvalds 已提交
813 814 815 816 817
	}
done_str:
	return i;
}

818 819
static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
{
820
	unsigned int n = 0;
821 822 823 824 825 826 827
	char c;
	ssize_t i = 0;
	int len;

	pkt_dev->nr_labels = 0;
	do {
		__u32 tmp;
F
Francesco Fondelli 已提交
828
		len = hex32_arg(&buffer[i], 8, &tmp);
829 830 831 832 833 834 835 836 837 838 839 840
		if (len <= 0)
			return len;
		pkt_dev->labels[n] = htonl(tmp);
		if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
			pkt_dev->flags |= F_MPLS_RND;
		i += len;
		if (get_user(c, &buffer[i]))
			return -EFAULT;
		i++;
		n++;
		if (n >= MAX_MPLS_LABELS)
			return -E2BIG;
841
	} while (c == ',');
842 843 844 845 846

	pkt_dev->nr_labels = n;
	return i;
}

L
Luiz Capitulino 已提交
847 848 849
static ssize_t pktgen_if_write(struct file *file,
			       const char __user * user_buffer, size_t count,
			       loff_t * offset)
L
Linus Torvalds 已提交
850
{
851
	struct seq_file *seq = file->private_data;
L
Luiz Capitulino 已提交
852
	struct pktgen_dev *pkt_dev = seq->private;
853
	int i, max, len;
L
Linus Torvalds 已提交
854 855
	char name[16], valstr[32];
	unsigned long value = 0;
L
Luiz Capitulino 已提交
856 857
	char *pg_result = NULL;
	int tmp = 0;
L
Linus Torvalds 已提交
858
	char buf[128];
L
Luiz Capitulino 已提交
859 860 861

	pg_result = &(pkt_dev->result[0]);

L
Linus Torvalds 已提交
862
	if (count < 1) {
J
Joe Perches 已提交
863
		pr_warning("wrong command format\n");
L
Linus Torvalds 已提交
864 865
		return -EINVAL;
	}
L
Luiz Capitulino 已提交
866

867 868
	max = count;
	tmp = count_trail_chars(user_buffer, max);
L
Luiz Capitulino 已提交
869
	if (tmp < 0) {
J
Joe Perches 已提交
870
		pr_warning("illegal format\n");
L
Luiz Capitulino 已提交
871
		return tmp;
L
Linus Torvalds 已提交
872
	}
873
	i = tmp;
L
Luiz Capitulino 已提交
874

L
Linus Torvalds 已提交
875 876 877
	/* Read variable name */

	len = strn_len(&user_buffer[i], sizeof(name) - 1);
878
	if (len < 0)
L
Luiz Capitulino 已提交
879
		return len;
880

L
Linus Torvalds 已提交
881
	memset(name, 0, sizeof(name));
L
Luiz Capitulino 已提交
882
	if (copy_from_user(name, &user_buffer[i], len))
L
Linus Torvalds 已提交
883 884
		return -EFAULT;
	i += len;
L
Luiz Capitulino 已提交
885 886

	max = count - i;
L
Linus Torvalds 已提交
887
	len = count_trail_chars(&user_buffer[i], max);
L
Luiz Capitulino 已提交
888 889 890
	if (len < 0)
		return len;

L
Linus Torvalds 已提交
891 892 893
	i += len;

	if (debug) {
894
		size_t copy = min_t(size_t, count, 1023);
895 896
		char tb[copy + 1];
		if (copy_from_user(tb, user_buffer, copy))
L
Linus Torvalds 已提交
897
			return -EFAULT;
898
		tb[copy] = 0;
J
Joe Perches 已提交
899 900
		pr_debug("%s,%lu  buffer -:%s:-\n",
			 name, (unsigned long)count, tb);
L
Luiz Capitulino 已提交
901
	}
L
Linus Torvalds 已提交
902 903 904

	if (!strcmp(name, "min_pkt_size")) {
		len = num_arg(&user_buffer[i], 10, &value);
905
		if (len < 0)
L
Luiz Capitulino 已提交
906
			return len;
907

L
Linus Torvalds 已提交
908
		i += len;
L
Luiz Capitulino 已提交
909 910 911 912 913 914 915 916
		if (value < 14 + 20 + 8)
			value = 14 + 20 + 8;
		if (value != pkt_dev->min_pkt_size) {
			pkt_dev->min_pkt_size = value;
			pkt_dev->cur_pkt_size = value;
		}
		sprintf(pg_result, "OK: min_pkt_size=%u",
			pkt_dev->min_pkt_size);
L
Linus Torvalds 已提交
917 918 919
		return count;
	}

L
Luiz Capitulino 已提交
920
	if (!strcmp(name, "max_pkt_size")) {
L
Linus Torvalds 已提交
921
		len = num_arg(&user_buffer[i], 10, &value);
922
		if (len < 0)
L
Luiz Capitulino 已提交
923
			return len;
924

L
Linus Torvalds 已提交
925
		i += len;
L
Luiz Capitulino 已提交
926 927 928 929 930 931 932 933
		if (value < 14 + 20 + 8)
			value = 14 + 20 + 8;
		if (value != pkt_dev->max_pkt_size) {
			pkt_dev->max_pkt_size = value;
			pkt_dev->cur_pkt_size = value;
		}
		sprintf(pg_result, "OK: max_pkt_size=%u",
			pkt_dev->max_pkt_size);
L
Linus Torvalds 已提交
934 935 936
		return count;
	}

L
Luiz Capitulino 已提交
937
	/* Shortcut for min = max */
L
Linus Torvalds 已提交
938 939 940

	if (!strcmp(name, "pkt_size")) {
		len = num_arg(&user_buffer[i], 10, &value);
941
		if (len < 0)
L
Luiz Capitulino 已提交
942
			return len;
943

L
Linus Torvalds 已提交
944
		i += len;
L
Luiz Capitulino 已提交
945 946 947 948 949 950 951
		if (value < 14 + 20 + 8)
			value = 14 + 20 + 8;
		if (value != pkt_dev->min_pkt_size) {
			pkt_dev->min_pkt_size = value;
			pkt_dev->max_pkt_size = value;
			pkt_dev->cur_pkt_size = value;
		}
L
Linus Torvalds 已提交
952 953 954 955
		sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
		return count;
	}

L
Luiz Capitulino 已提交
956
	if (!strcmp(name, "debug")) {
L
Linus Torvalds 已提交
957
		len = num_arg(&user_buffer[i], 10, &value);
958
		if (len < 0)
L
Luiz Capitulino 已提交
959
			return len;
960

L
Linus Torvalds 已提交
961
		i += len;
L
Luiz Capitulino 已提交
962
		debug = value;
L
Linus Torvalds 已提交
963 964 965 966
		sprintf(pg_result, "OK: debug=%u", debug);
		return count;
	}

L
Luiz Capitulino 已提交
967
	if (!strcmp(name, "frags")) {
L
Linus Torvalds 已提交
968
		len = num_arg(&user_buffer[i], 10, &value);
969
		if (len < 0)
L
Luiz Capitulino 已提交
970
			return len;
971

L
Linus Torvalds 已提交
972 973 974 975 976 977 978
		i += len;
		pkt_dev->nfrags = value;
		sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
		return count;
	}
	if (!strcmp(name, "delay")) {
		len = num_arg(&user_buffer[i], 10, &value);
979
		if (len < 0)
L
Luiz Capitulino 已提交
980
			return len;
981

L
Linus Torvalds 已提交
982
		i += len;
983 984 985
		if (value == 0x7FFFFFFF)
			pkt_dev->delay = ULLONG_MAX;
		else
E
Eric Dumazet 已提交
986
			pkt_dev->delay = (u64)value;
987 988 989

		sprintf(pg_result, "OK: delay=%llu",
			(unsigned long long) pkt_dev->delay);
L
Linus Torvalds 已提交
990 991
		return count;
	}
992 993 994 995 996 997 998 999 1000 1001
	if (!strcmp(name, "rate")) {
		len = num_arg(&user_buffer[i], 10, &value);
		if (len < 0)
			return len;

		i += len;
		if (!value)
			return len;
		pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
		if (debug)
J
Joe Perches 已提交
1002
			pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016

		sprintf(pg_result, "OK: rate=%lu", value);
		return count;
	}
	if (!strcmp(name, "ratep")) {
		len = num_arg(&user_buffer[i], 10, &value);
		if (len < 0)
			return len;

		i += len;
		if (!value)
			return len;
		pkt_dev->delay = NSEC_PER_SEC/value;
		if (debug)
J
Joe Perches 已提交
1017
			pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1018 1019 1020 1021

		sprintf(pg_result, "OK: rate=%lu", value);
		return count;
	}
L
Luiz Capitulino 已提交
1022
	if (!strcmp(name, "udp_src_min")) {
L
Linus Torvalds 已提交
1023
		len = num_arg(&user_buffer[i], 10, &value);
1024
		if (len < 0)
L
Luiz Capitulino 已提交
1025
			return len;
1026

L
Linus Torvalds 已提交
1027
		i += len;
L
Luiz Capitulino 已提交
1028 1029 1030 1031
		if (value != pkt_dev->udp_src_min) {
			pkt_dev->udp_src_min = value;
			pkt_dev->cur_udp_src = value;
		}
L
Linus Torvalds 已提交
1032 1033 1034
		sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
		return count;
	}
L
Luiz Capitulino 已提交
1035
	if (!strcmp(name, "udp_dst_min")) {
L
Linus Torvalds 已提交
1036
		len = num_arg(&user_buffer[i], 10, &value);
1037
		if (len < 0)
L
Luiz Capitulino 已提交
1038
			return len;
1039

L
Linus Torvalds 已提交
1040
		i += len;
L
Luiz Capitulino 已提交
1041 1042 1043 1044
		if (value != pkt_dev->udp_dst_min) {
			pkt_dev->udp_dst_min = value;
			pkt_dev->cur_udp_dst = value;
		}
L
Linus Torvalds 已提交
1045 1046 1047
		sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
		return count;
	}
L
Luiz Capitulino 已提交
1048
	if (!strcmp(name, "udp_src_max")) {
L
Linus Torvalds 已提交
1049
		len = num_arg(&user_buffer[i], 10, &value);
1050
		if (len < 0)
L
Luiz Capitulino 已提交
1051
			return len;
1052

L
Linus Torvalds 已提交
1053
		i += len;
L
Luiz Capitulino 已提交
1054 1055 1056 1057
		if (value != pkt_dev->udp_src_max) {
			pkt_dev->udp_src_max = value;
			pkt_dev->cur_udp_src = value;
		}
L
Linus Torvalds 已提交
1058 1059 1060
		sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
		return count;
	}
L
Luiz Capitulino 已提交
1061
	if (!strcmp(name, "udp_dst_max")) {
L
Linus Torvalds 已提交
1062
		len = num_arg(&user_buffer[i], 10, &value);
1063
		if (len < 0)
L
Luiz Capitulino 已提交
1064
			return len;
1065

L
Linus Torvalds 已提交
1066
		i += len;
L
Luiz Capitulino 已提交
1067 1068 1069 1070
		if (value != pkt_dev->udp_dst_max) {
			pkt_dev->udp_dst_max = value;
			pkt_dev->cur_udp_dst = value;
		}
L
Linus Torvalds 已提交
1071 1072 1073 1074 1075
		sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
		return count;
	}
	if (!strcmp(name, "clone_skb")) {
		len = num_arg(&user_buffer[i], 10, &value);
1076
		if (len < 0)
L
Luiz Capitulino 已提交
1077
			return len;
1078 1079 1080
		if ((value > 0) &&
		    (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
			return -ENOTSUPP;
L
Linus Torvalds 已提交
1081
		i += len;
L
Luiz Capitulino 已提交
1082 1083
		pkt_dev->clone_skb = value;

L
Linus Torvalds 已提交
1084 1085 1086 1087 1088
		sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
		return count;
	}
	if (!strcmp(name, "count")) {
		len = num_arg(&user_buffer[i], 10, &value);
1089
		if (len < 0)
L
Luiz Capitulino 已提交
1090
			return len;
1091

L
Linus Torvalds 已提交
1092 1093 1094
		i += len;
		pkt_dev->count = value;
		sprintf(pg_result, "OK: count=%llu",
L
Luiz Capitulino 已提交
1095
			(unsigned long long)pkt_dev->count);
L
Linus Torvalds 已提交
1096 1097 1098 1099
		return count;
	}
	if (!strcmp(name, "src_mac_count")) {
		len = num_arg(&user_buffer[i], 10, &value);
1100
		if (len < 0)
L
Luiz Capitulino 已提交
1101
			return len;
1102

L
Linus Torvalds 已提交
1103 1104
		i += len;
		if (pkt_dev->src_mac_count != value) {
L
Luiz Capitulino 已提交
1105 1106 1107 1108 1109
			pkt_dev->src_mac_count = value;
			pkt_dev->cur_src_mac_offset = 0;
		}
		sprintf(pg_result, "OK: src_mac_count=%d",
			pkt_dev->src_mac_count);
L
Linus Torvalds 已提交
1110 1111 1112 1113
		return count;
	}
	if (!strcmp(name, "dst_mac_count")) {
		len = num_arg(&user_buffer[i], 10, &value);
1114
		if (len < 0)
L
Luiz Capitulino 已提交
1115
			return len;
1116

L
Linus Torvalds 已提交
1117 1118
		i += len;
		if (pkt_dev->dst_mac_count != value) {
L
Luiz Capitulino 已提交
1119 1120 1121 1122 1123
			pkt_dev->dst_mac_count = value;
			pkt_dev->cur_dst_mac_offset = 0;
		}
		sprintf(pg_result, "OK: dst_mac_count=%d",
			pkt_dev->dst_mac_count);
L
Linus Torvalds 已提交
1124 1125
		return count;
	}
R
Robert Olsson 已提交
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
	if (!strcmp(name, "node")) {
		len = num_arg(&user_buffer[i], 10, &value);
		if (len < 0)
			return len;

		i += len;

		if (node_possible(value)) {
			pkt_dev->node = value;
			sprintf(pg_result, "OK: node=%d", pkt_dev->node);
E
Eric Dumazet 已提交
1136 1137 1138 1139
			if (pkt_dev->page) {
				put_page(pkt_dev->page);
				pkt_dev->page = NULL;
			}
R
Robert Olsson 已提交
1140 1141 1142 1143 1144
		}
		else
			sprintf(pg_result, "ERROR: node not possible");
		return count;
	}
L
Linus Torvalds 已提交
1145
	if (!strcmp(name, "flag")) {
L
Luiz Capitulino 已提交
1146 1147
		char f[32];
		memset(f, 0, 32);
L
Linus Torvalds 已提交
1148
		len = strn_len(&user_buffer[i], sizeof(f) - 1);
1149
		if (len < 0)
L
Luiz Capitulino 已提交
1150
			return len;
1151

L
Linus Torvalds 已提交
1152 1153 1154
		if (copy_from_user(f, &user_buffer[i], len))
			return -EFAULT;
		i += len;
L
Luiz Capitulino 已提交
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
		if (strcmp(f, "IPSRC_RND") == 0)
			pkt_dev->flags |= F_IPSRC_RND;

		else if (strcmp(f, "!IPSRC_RND") == 0)
			pkt_dev->flags &= ~F_IPSRC_RND;

		else if (strcmp(f, "TXSIZE_RND") == 0)
			pkt_dev->flags |= F_TXSIZE_RND;

		else if (strcmp(f, "!TXSIZE_RND") == 0)
			pkt_dev->flags &= ~F_TXSIZE_RND;

		else if (strcmp(f, "IPDST_RND") == 0)
			pkt_dev->flags |= F_IPDST_RND;

		else if (strcmp(f, "!IPDST_RND") == 0)
			pkt_dev->flags &= ~F_IPDST_RND;

		else if (strcmp(f, "UDPSRC_RND") == 0)
			pkt_dev->flags |= F_UDPSRC_RND;

		else if (strcmp(f, "!UDPSRC_RND") == 0)
			pkt_dev->flags &= ~F_UDPSRC_RND;

		else if (strcmp(f, "UDPDST_RND") == 0)
			pkt_dev->flags |= F_UDPDST_RND;

		else if (strcmp(f, "!UDPDST_RND") == 0)
			pkt_dev->flags &= ~F_UDPDST_RND;

		else if (strcmp(f, "MACSRC_RND") == 0)
			pkt_dev->flags |= F_MACSRC_RND;

		else if (strcmp(f, "!MACSRC_RND") == 0)
			pkt_dev->flags &= ~F_MACSRC_RND;

		else if (strcmp(f, "MACDST_RND") == 0)
			pkt_dev->flags |= F_MACDST_RND;

		else if (strcmp(f, "!MACDST_RND") == 0)
			pkt_dev->flags &= ~F_MACDST_RND;

1197 1198 1199 1200 1201 1202
		else if (strcmp(f, "MPLS_RND") == 0)
			pkt_dev->flags |= F_MPLS_RND;

		else if (strcmp(f, "!MPLS_RND") == 0)
			pkt_dev->flags &= ~F_MPLS_RND;

F
Francesco Fondelli 已提交
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214
		else if (strcmp(f, "VID_RND") == 0)
			pkt_dev->flags |= F_VID_RND;

		else if (strcmp(f, "!VID_RND") == 0)
			pkt_dev->flags &= ~F_VID_RND;

		else if (strcmp(f, "SVID_RND") == 0)
			pkt_dev->flags |= F_SVID_RND;

		else if (strcmp(f, "!SVID_RND") == 0)
			pkt_dev->flags &= ~F_SVID_RND;

1215 1216 1217
		else if (strcmp(f, "FLOW_SEQ") == 0)
			pkt_dev->flags |= F_FLOW_SEQ;

R
Robert Olsson 已提交
1218 1219 1220 1221 1222
		else if (strcmp(f, "QUEUE_MAP_RND") == 0)
			pkt_dev->flags |= F_QUEUE_MAP_RND;

		else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
			pkt_dev->flags &= ~F_QUEUE_MAP_RND;
R
Robert Olsson 已提交
1223 1224 1225 1226 1227 1228

		else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
			pkt_dev->flags |= F_QUEUE_MAP_CPU;

		else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
			pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
J
Jamal Hadi Salim 已提交
1229 1230 1231 1232 1233
#ifdef CONFIG_XFRM
		else if (strcmp(f, "IPSEC") == 0)
			pkt_dev->flags |= F_IPSEC_ON;
#endif

F
Francesco Fondelli 已提交
1234 1235 1236
		else if (strcmp(f, "!IPV6") == 0)
			pkt_dev->flags &= ~F_IPV6;

R
Robert Olsson 已提交
1237 1238 1239 1240 1241 1242
		else if (strcmp(f, "NODE_ALLOC") == 0)
			pkt_dev->flags |= F_NODE;

		else if (strcmp(f, "!NODE_ALLOC") == 0)
			pkt_dev->flags &= ~F_NODE;

1243 1244 1245 1246 1247 1248
		else if (strcmp(f, "UDPCSUM") == 0)
			pkt_dev->flags |= F_UDPCSUM;

		else if (strcmp(f, "!UDPCSUM") == 0)
			pkt_dev->flags &= ~F_UDPCSUM;

L
Luiz Capitulino 已提交
1249 1250 1251 1252
		else {
			sprintf(pg_result,
				"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
				f,
F
Francesco Fondelli 已提交
1253
				"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
R
Robert Olsson 已提交
1254
				"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
L
Luiz Capitulino 已提交
1255 1256
			return count;
		}
L
Linus Torvalds 已提交
1257 1258 1259 1260 1261
		sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
		return count;
	}
	if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
		len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1262
		if (len < 0)
L
Luiz Capitulino 已提交
1263
			return len;
L
Linus Torvalds 已提交
1264

L
Luiz Capitulino 已提交
1265
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1266
			return -EFAULT;
L
Luiz Capitulino 已提交
1267 1268 1269 1270 1271 1272 1273 1274
		buf[len] = 0;
		if (strcmp(buf, pkt_dev->dst_min) != 0) {
			memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
			strncpy(pkt_dev->dst_min, buf, len);
			pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
			pkt_dev->cur_daddr = pkt_dev->daddr_min;
		}
		if (debug)
J
Joe Perches 已提交
1275
			pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
L
Luiz Capitulino 已提交
1276
		i += len;
L
Linus Torvalds 已提交
1277 1278 1279 1280 1281
		sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
		return count;
	}
	if (!strcmp(name, "dst_max")) {
		len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1282
		if (len < 0)
L
Luiz Capitulino 已提交
1283
			return len;
1284

L
Linus Torvalds 已提交
1285

L
Luiz Capitulino 已提交
1286
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1287 1288
			return -EFAULT;

L
Luiz Capitulino 已提交
1289 1290 1291 1292 1293 1294 1295 1296
		buf[len] = 0;
		if (strcmp(buf, pkt_dev->dst_max) != 0) {
			memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
			strncpy(pkt_dev->dst_max, buf, len);
			pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
			pkt_dev->cur_daddr = pkt_dev->daddr_max;
		}
		if (debug)
J
Joe Perches 已提交
1297
			pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
L
Linus Torvalds 已提交
1298 1299 1300 1301 1302 1303
		i += len;
		sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
		return count;
	}
	if (!strcmp(name, "dst6")) {
		len = strn_len(&user_buffer[i], sizeof(buf) - 1);
L
Luiz Capitulino 已提交
1304 1305
		if (len < 0)
			return len;
L
Linus Torvalds 已提交
1306 1307 1308

		pkt_dev->flags |= F_IPV6;

L
Luiz Capitulino 已提交
1309
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1310
			return -EFAULT;
L
Luiz Capitulino 已提交
1311
		buf[len] = 0;
L
Linus Torvalds 已提交
1312

1313
		in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1314
		snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
L
Linus Torvalds 已提交
1315

A
Alexey Dobriyan 已提交
1316
		pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
L
Linus Torvalds 已提交
1317

L
Luiz Capitulino 已提交
1318
		if (debug)
J
Joe Perches 已提交
1319
			pr_debug("dst6 set to: %s\n", buf);
L
Linus Torvalds 已提交
1320

L
Luiz Capitulino 已提交
1321
		i += len;
L
Linus Torvalds 已提交
1322 1323 1324 1325 1326
		sprintf(pg_result, "OK: dst6=%s", buf);
		return count;
	}
	if (!strcmp(name, "dst6_min")) {
		len = strn_len(&user_buffer[i], sizeof(buf) - 1);
L
Luiz Capitulino 已提交
1327 1328
		if (len < 0)
			return len;
L
Linus Torvalds 已提交
1329 1330 1331

		pkt_dev->flags |= F_IPV6;

L
Luiz Capitulino 已提交
1332
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1333
			return -EFAULT;
L
Luiz Capitulino 已提交
1334
		buf[len] = 0;
L
Linus Torvalds 已提交
1335

1336
		in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1337
		snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
L
Linus Torvalds 已提交
1338

A
Alexey Dobriyan 已提交
1339
		pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
L
Luiz Capitulino 已提交
1340
		if (debug)
J
Joe Perches 已提交
1341
			pr_debug("dst6_min set to: %s\n", buf);
L
Linus Torvalds 已提交
1342

L
Luiz Capitulino 已提交
1343
		i += len;
L
Linus Torvalds 已提交
1344 1345 1346 1347 1348
		sprintf(pg_result, "OK: dst6_min=%s", buf);
		return count;
	}
	if (!strcmp(name, "dst6_max")) {
		len = strn_len(&user_buffer[i], sizeof(buf) - 1);
L
Luiz Capitulino 已提交
1349 1350
		if (len < 0)
			return len;
L
Linus Torvalds 已提交
1351 1352 1353

		pkt_dev->flags |= F_IPV6;

L
Luiz Capitulino 已提交
1354
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1355
			return -EFAULT;
L
Luiz Capitulino 已提交
1356
		buf[len] = 0;
L
Linus Torvalds 已提交
1357

1358
		in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1359
		snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
L
Linus Torvalds 已提交
1360

L
Luiz Capitulino 已提交
1361
		if (debug)
J
Joe Perches 已提交
1362
			pr_debug("dst6_max set to: %s\n", buf);
L
Linus Torvalds 已提交
1363

L
Luiz Capitulino 已提交
1364
		i += len;
L
Linus Torvalds 已提交
1365 1366 1367 1368 1369
		sprintf(pg_result, "OK: dst6_max=%s", buf);
		return count;
	}
	if (!strcmp(name, "src6")) {
		len = strn_len(&user_buffer[i], sizeof(buf) - 1);
L
Luiz Capitulino 已提交
1370 1371
		if (len < 0)
			return len;
L
Linus Torvalds 已提交
1372 1373 1374

		pkt_dev->flags |= F_IPV6;

L
Luiz Capitulino 已提交
1375
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1376
			return -EFAULT;
L
Luiz Capitulino 已提交
1377
		buf[len] = 0;
L
Linus Torvalds 已提交
1378

1379
		in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1380
		snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
L
Linus Torvalds 已提交
1381

A
Alexey Dobriyan 已提交
1382
		pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
L
Linus Torvalds 已提交
1383

L
Luiz Capitulino 已提交
1384
		if (debug)
J
Joe Perches 已提交
1385
			pr_debug("src6 set to: %s\n", buf);
L
Luiz Capitulino 已提交
1386 1387

		i += len;
L
Linus Torvalds 已提交
1388 1389 1390 1391 1392
		sprintf(pg_result, "OK: src6=%s", buf);
		return count;
	}
	if (!strcmp(name, "src_min")) {
		len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1393
		if (len < 0)
L
Luiz Capitulino 已提交
1394
			return len;
1395

L
Luiz Capitulino 已提交
1396
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1397
			return -EFAULT;
L
Luiz Capitulino 已提交
1398 1399 1400 1401 1402 1403 1404 1405
		buf[len] = 0;
		if (strcmp(buf, pkt_dev->src_min) != 0) {
			memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
			strncpy(pkt_dev->src_min, buf, len);
			pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
			pkt_dev->cur_saddr = pkt_dev->saddr_min;
		}
		if (debug)
J
Joe Perches 已提交
1406
			pr_debug("src_min set to: %s\n", pkt_dev->src_min);
L
Linus Torvalds 已提交
1407 1408 1409 1410 1411 1412
		i += len;
		sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
		return count;
	}
	if (!strcmp(name, "src_max")) {
		len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1413
		if (len < 0)
L
Luiz Capitulino 已提交
1414
			return len;
1415

L
Luiz Capitulino 已提交
1416
		if (copy_from_user(buf, &user_buffer[i], len))
L
Linus Torvalds 已提交
1417
			return -EFAULT;
L
Luiz Capitulino 已提交
1418 1419 1420 1421 1422 1423 1424 1425
		buf[len] = 0;
		if (strcmp(buf, pkt_dev->src_max) != 0) {
			memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
			strncpy(pkt_dev->src_max, buf, len);
			pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
			pkt_dev->cur_saddr = pkt_dev->saddr_max;
		}
		if (debug)
J
Joe Perches 已提交
1426
			pr_debug("src_max set to: %s\n", pkt_dev->src_max);
L
Linus Torvalds 已提交
1427 1428 1429 1430 1431 1432
		i += len;
		sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
		return count;
	}
	if (!strcmp(name, "dst_mac")) {
		len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1433
		if (len < 0)
L
Luiz Capitulino 已提交
1434
			return len;
1435

L
Linus Torvalds 已提交
1436
		memset(valstr, 0, sizeof(valstr));
L
Luiz Capitulino 已提交
1437
		if (copy_from_user(valstr, &user_buffer[i], len))
L
Linus Torvalds 已提交
1438 1439
			return -EFAULT;

1440 1441
		if (!mac_pton(valstr, pkt_dev->dst_mac))
			return -EINVAL;
L
Linus Torvalds 已提交
1442
		/* Set up Dest MAC */
1443
		memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
L
Luiz Capitulino 已提交
1444

1445
		sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
L
Linus Torvalds 已提交
1446 1447 1448 1449
		return count;
	}
	if (!strcmp(name, "src_mac")) {
		len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1450
		if (len < 0)
L
Luiz Capitulino 已提交
1451
			return len;
1452

L
Linus Torvalds 已提交
1453
		memset(valstr, 0, sizeof(valstr));
L
Luiz Capitulino 已提交
1454
		if (copy_from_user(valstr, &user_buffer[i], len))
L
Linus Torvalds 已提交
1455 1456
			return -EFAULT;

1457 1458
		if (!mac_pton(valstr, pkt_dev->src_mac))
			return -EINVAL;
A
Adit Ranadive 已提交
1459
		/* Set up Src MAC */
1460
		memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
A
Adit Ranadive 已提交
1461

1462
		sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
L
Linus Torvalds 已提交
1463 1464 1465
		return count;
	}

L
Luiz Capitulino 已提交
1466 1467 1468 1469 1470
	if (!strcmp(name, "clear_counters")) {
		pktgen_clear_counters(pkt_dev);
		sprintf(pg_result, "OK: Clearing counters.\n");
		return count;
	}
L
Linus Torvalds 已提交
1471 1472 1473

	if (!strcmp(name, "flows")) {
		len = num_arg(&user_buffer[i], 10, &value);
1474
		if (len < 0)
L
Luiz Capitulino 已提交
1475
			return len;
1476

L
Linus Torvalds 已提交
1477 1478 1479 1480 1481 1482 1483 1484 1485
		i += len;
		if (value > MAX_CFLOWS)
			value = MAX_CFLOWS;

		pkt_dev->cflows = value;
		sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
		return count;
	}

1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496
	if (!strcmp(name, "spi")) {
		len = num_arg(&user_buffer[i], 10, &value);
		if (len < 0)
			return len;

		i += len;
		pkt_dev->spi = value;
		sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
		return count;
	}

L
Linus Torvalds 已提交
1497 1498
	if (!strcmp(name, "flowlen")) {
		len = num_arg(&user_buffer[i], 10, &value);
1499
		if (len < 0)
L
Luiz Capitulino 已提交
1500
			return len;
1501

L
Linus Torvalds 已提交
1502 1503 1504 1505 1506
		i += len;
		pkt_dev->lflow = value;
		sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
		return count;
	}
L
Luiz Capitulino 已提交
1507

R
Robert Olsson 已提交
1508 1509
	if (!strcmp(name, "queue_map_min")) {
		len = num_arg(&user_buffer[i], 5, &value);
1510
		if (len < 0)
R
Robert Olsson 已提交
1511
			return len;
1512

R
Robert Olsson 已提交
1513 1514 1515 1516 1517 1518 1519 1520
		i += len;
		pkt_dev->queue_map_min = value;
		sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
		return count;
	}

	if (!strcmp(name, "queue_map_max")) {
		len = num_arg(&user_buffer[i], 5, &value);
1521
		if (len < 0)
R
Robert Olsson 已提交
1522
			return len;
1523

R
Robert Olsson 已提交
1524 1525 1526 1527 1528 1529
		i += len;
		pkt_dev->queue_map_max = value;
		sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
		return count;
	}

1530
	if (!strcmp(name, "mpls")) {
1531
		unsigned int n, cnt;
S
Stephen Hemminger 已提交
1532

1533
		len = get_labels(&user_buffer[i], pkt_dev);
S
Stephen Hemminger 已提交
1534 1535
		if (len < 0)
			return len;
1536
		i += len;
S
Stephen Hemminger 已提交
1537
		cnt = sprintf(pg_result, "OK: mpls=");
1538
		for (n = 0; n < pkt_dev->nr_labels; n++)
S
Stephen Hemminger 已提交
1539 1540 1541
			cnt += sprintf(pg_result + cnt,
				       "%08x%s", ntohl(pkt_dev->labels[n]),
				       n == pkt_dev->nr_labels-1 ? "" : ",");
F
Francesco Fondelli 已提交
1542 1543 1544 1545 1546 1547

		if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
			pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
			pkt_dev->svlan_id = 0xffff;

			if (debug)
J
Joe Perches 已提交
1548
				pr_debug("VLAN/SVLAN auto turned off\n");
F
Francesco Fondelli 已提交
1549 1550 1551 1552 1553 1554
		}
		return count;
	}

	if (!strcmp(name, "vlan_id")) {
		len = num_arg(&user_buffer[i], 4, &value);
1555
		if (len < 0)
F
Francesco Fondelli 已提交
1556
			return len;
1557

F
Francesco Fondelli 已提交
1558 1559 1560 1561 1562
		i += len;
		if (value <= 4095) {
			pkt_dev->vlan_id = value;  /* turn on VLAN */

			if (debug)
J
Joe Perches 已提交
1563
				pr_debug("VLAN turned on\n");
F
Francesco Fondelli 已提交
1564 1565

			if (debug && pkt_dev->nr_labels)
J
Joe Perches 已提交
1566
				pr_debug("MPLS auto turned off\n");
F
Francesco Fondelli 已提交
1567 1568 1569 1570 1571 1572 1573 1574

			pkt_dev->nr_labels = 0;    /* turn off MPLS */
			sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
		} else {
			pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
			pkt_dev->svlan_id = 0xffff;

			if (debug)
J
Joe Perches 已提交
1575
				pr_debug("VLAN/SVLAN turned off\n");
F
Francesco Fondelli 已提交
1576 1577 1578 1579 1580 1581
		}
		return count;
	}

	if (!strcmp(name, "vlan_p")) {
		len = num_arg(&user_buffer[i], 1, &value);
1582
		if (len < 0)
F
Francesco Fondelli 已提交
1583
			return len;
1584

F
Francesco Fondelli 已提交
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
		i += len;
		if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
			pkt_dev->vlan_p = value;
			sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
		} else {
			sprintf(pg_result, "ERROR: vlan_p must be 0-7");
		}
		return count;
	}

	if (!strcmp(name, "vlan_cfi")) {
		len = num_arg(&user_buffer[i], 1, &value);
1597
		if (len < 0)
F
Francesco Fondelli 已提交
1598
			return len;
1599

F
Francesco Fondelli 已提交
1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611
		i += len;
		if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
			pkt_dev->vlan_cfi = value;
			sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
		} else {
			sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
		}
		return count;
	}

	if (!strcmp(name, "svlan_id")) {
		len = num_arg(&user_buffer[i], 4, &value);
1612
		if (len < 0)
F
Francesco Fondelli 已提交
1613
			return len;
1614

F
Francesco Fondelli 已提交
1615 1616 1617 1618 1619
		i += len;
		if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
			pkt_dev->svlan_id = value;  /* turn on SVLAN */

			if (debug)
J
Joe Perches 已提交
1620
				pr_debug("SVLAN turned on\n");
F
Francesco Fondelli 已提交
1621 1622

			if (debug && pkt_dev->nr_labels)
J
Joe Perches 已提交
1623
				pr_debug("MPLS auto turned off\n");
F
Francesco Fondelli 已提交
1624 1625 1626 1627 1628 1629 1630 1631

			pkt_dev->nr_labels = 0;    /* turn off MPLS */
			sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
		} else {
			pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
			pkt_dev->svlan_id = 0xffff;

			if (debug)
J
Joe Perches 已提交
1632
				pr_debug("VLAN/SVLAN turned off\n");
F
Francesco Fondelli 已提交
1633 1634 1635 1636 1637 1638
		}
		return count;
	}

	if (!strcmp(name, "svlan_p")) {
		len = num_arg(&user_buffer[i], 1, &value);
1639
		if (len < 0)
F
Francesco Fondelli 已提交
1640
			return len;
1641

F
Francesco Fondelli 已提交
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653
		i += len;
		if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
			pkt_dev->svlan_p = value;
			sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
		} else {
			sprintf(pg_result, "ERROR: svlan_p must be 0-7");
		}
		return count;
	}

	if (!strcmp(name, "svlan_cfi")) {
		len = num_arg(&user_buffer[i], 1, &value);
1654
		if (len < 0)
F
Francesco Fondelli 已提交
1655
			return len;
1656

F
Francesco Fondelli 已提交
1657 1658 1659 1660 1661 1662 1663
		i += len;
		if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
			pkt_dev->svlan_cfi = value;
			sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
		} else {
			sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
		}
1664 1665 1666
		return count;
	}

F
Francesco Fondelli 已提交
1667 1668 1669
	if (!strcmp(name, "tos")) {
		__u32 tmp_value = 0;
		len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1670
		if (len < 0)
F
Francesco Fondelli 已提交
1671
			return len;
1672

F
Francesco Fondelli 已提交
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
		i += len;
		if (len == 2) {
			pkt_dev->tos = tmp_value;
			sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
		} else {
			sprintf(pg_result, "ERROR: tos must be 00-ff");
		}
		return count;
	}

	if (!strcmp(name, "traffic_class")) {
		__u32 tmp_value = 0;
		len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1686
		if (len < 0)
F
Francesco Fondelli 已提交
1687
			return len;
1688

F
Francesco Fondelli 已提交
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698
		i += len;
		if (len == 2) {
			pkt_dev->traffic_class = tmp_value;
			sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
		} else {
			sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
		}
		return count;
	}

J
John Fastabend 已提交
1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
	if (!strcmp(name, "skb_priority")) {
		len = num_arg(&user_buffer[i], 9, &value);
		if (len < 0)
			return len;

		i += len;
		pkt_dev->skb_priority = value;
		sprintf(pg_result, "OK: skb_priority=%i",
			pkt_dev->skb_priority);
		return count;
	}

L
Linus Torvalds 已提交
1711 1712 1713 1714
	sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
	return -EINVAL;
}

1715
static int pktgen_if_open(struct inode *inode, struct file *file)
L
Linus Torvalds 已提交
1716
{
A
Al Viro 已提交
1717
	return single_open(file, pktgen_if_show, PDE_DATA(inode));
1718
}
L
Linus Torvalds 已提交
1719

1720
static const struct file_operations pktgen_if_fops = {
L
Luiz Capitulino 已提交
1721 1722 1723 1724 1725 1726
	.owner   = THIS_MODULE,
	.open    = pktgen_if_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.write   = pktgen_if_write,
	.release = single_release,
1727
};
L
Linus Torvalds 已提交
1728

1729 1730
static int pktgen_thread_show(struct seq_file *seq, void *v)
{
L
Luiz Capitulino 已提交
1731
	struct pktgen_thread *t = seq->private;
S
Stephen Hemminger 已提交
1732
	const struct pktgen_dev *pkt_dev;
1733 1734

	BUG_ON(!t);
L
Linus Torvalds 已提交
1735

L
Luiz Capitulino 已提交
1736
	seq_printf(seq, "Running: ");
L
Linus Torvalds 已提交
1737

L
Luiz Capitulino 已提交
1738
	if_lock(t);
1739
	list_for_each_entry(pkt_dev, &t->if_list, list)
L
Luiz Capitulino 已提交
1740
		if (pkt_dev->running)
E
Eric Dumazet 已提交
1741
			seq_printf(seq, "%s ", pkt_dev->odevname);
L
Linus Torvalds 已提交
1742

L
Luiz Capitulino 已提交
1743 1744
	seq_printf(seq, "\nStopped: ");

1745
	list_for_each_entry(pkt_dev, &t->if_list, list)
L
Luiz Capitulino 已提交
1746
		if (!pkt_dev->running)
E
Eric Dumazet 已提交
1747
			seq_printf(seq, "%s ", pkt_dev->odevname);
L
Linus Torvalds 已提交
1748 1749

	if (t->result[0])
1750
		seq_printf(seq, "\nResult: %s\n", t->result);
L
Linus Torvalds 已提交
1751
	else
1752
		seq_printf(seq, "\nResult: NA\n");
L
Linus Torvalds 已提交
1753

L
Luiz Capitulino 已提交
1754
	if_unlock(t);
L
Linus Torvalds 已提交
1755

1756
	return 0;
L
Linus Torvalds 已提交
1757 1758
}

1759
static ssize_t pktgen_thread_write(struct file *file,
L
Luiz Capitulino 已提交
1760 1761
				   const char __user * user_buffer,
				   size_t count, loff_t * offset)
L
Linus Torvalds 已提交
1762
{
1763
	struct seq_file *seq = file->private_data;
L
Luiz Capitulino 已提交
1764
	struct pktgen_thread *t = seq->private;
1765
	int i, max, len, ret;
L
Linus Torvalds 已提交
1766
	char name[40];
L
Luiz Capitulino 已提交
1767
	char *pg_result;
1768

L
Linus Torvalds 已提交
1769
	if (count < 1) {
L
Luiz Capitulino 已提交
1770
		//      sprintf(pg_result, "Wrong command format");
L
Linus Torvalds 已提交
1771 1772
		return -EINVAL;
	}
1773

1774 1775
	max = count;
	len = count_trail_chars(user_buffer, max);
L
Luiz Capitulino 已提交
1776
	if (len < 0)
1777 1778
		return len;

1779
	i = len;
1780

L
Linus Torvalds 已提交
1781 1782 1783
	/* Read variable name */

	len = strn_len(&user_buffer[i], sizeof(name) - 1);
L
Luiz Capitulino 已提交
1784
	if (len < 0)
1785
		return len;
L
Luiz Capitulino 已提交
1786

L
Linus Torvalds 已提交
1787 1788 1789 1790
	memset(name, 0, sizeof(name));
	if (copy_from_user(name, &user_buffer[i], len))
		return -EFAULT;
	i += len;
1791

L
Luiz Capitulino 已提交
1792
	max = count - i;
L
Linus Torvalds 已提交
1793
	len = count_trail_chars(&user_buffer[i], max);
L
Luiz Capitulino 已提交
1794
	if (len < 0)
1795 1796
		return len;

L
Linus Torvalds 已提交
1797 1798
	i += len;

1799
	if (debug)
J
Joe Perches 已提交
1800
		pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
L
Linus Torvalds 已提交
1801

L
Luiz Capitulino 已提交
1802
	if (!t) {
J
Joe Perches 已提交
1803
		pr_err("ERROR: No thread\n");
L
Linus Torvalds 已提交
1804 1805 1806 1807 1808 1809
		ret = -EINVAL;
		goto out;
	}

	pg_result = &(t->result[0]);

L
Luiz Capitulino 已提交
1810 1811 1812
	if (!strcmp(name, "add_device")) {
		char f[32];
		memset(f, 0, 32);
L
Linus Torvalds 已提交
1813
		len = strn_len(&user_buffer[i], sizeof(f) - 1);
L
Luiz Capitulino 已提交
1814 1815
		if (len < 0) {
			ret = len;
L
Linus Torvalds 已提交
1816 1817
			goto out;
		}
L
Luiz Capitulino 已提交
1818
		if (copy_from_user(f, &user_buffer[i], len))
L
Linus Torvalds 已提交
1819 1820
			return -EFAULT;
		i += len;
1821
		mutex_lock(&pktgen_thread_lock);
1822
		ret = pktgen_add_device(t, f);
1823
		mutex_unlock(&pktgen_thread_lock);
1824 1825 1826 1827 1828
		if (!ret) {
			ret = count;
			sprintf(pg_result, "OK: add_device=%s", f);
		} else
			sprintf(pg_result, "ERROR: can not add device %s", f);
L
Linus Torvalds 已提交
1829 1830 1831
		goto out;
	}

L
Luiz Capitulino 已提交
1832
	if (!strcmp(name, "rem_device_all")) {
1833
		mutex_lock(&pktgen_thread_lock);
1834
		t->control |= T_REMDEVALL;
1835
		mutex_unlock(&pktgen_thread_lock);
L
Luiz Capitulino 已提交
1836
		schedule_timeout_interruptible(msecs_to_jiffies(125));	/* Propagate thread->control  */
L
Linus Torvalds 已提交
1837
		ret = count;
L
Luiz Capitulino 已提交
1838
		sprintf(pg_result, "OK: rem_device_all");
L
Linus Torvalds 已提交
1839 1840 1841
		goto out;
	}

L
Luiz Capitulino 已提交
1842
	if (!strcmp(name, "max_before_softirq")) {
1843
		sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
L
Luiz Capitulino 已提交
1844
		ret = count;
L
Linus Torvalds 已提交
1845 1846 1847 1848
		goto out;
	}

	ret = -EINVAL;
L
Luiz Capitulino 已提交
1849
out:
L
Linus Torvalds 已提交
1850 1851 1852
	return ret;
}

1853
static int pktgen_thread_open(struct inode *inode, struct file *file)
L
Linus Torvalds 已提交
1854
{
A
Al Viro 已提交
1855
	return single_open(file, pktgen_thread_show, PDE_DATA(inode));
L
Linus Torvalds 已提交
1856 1857
}

1858
static const struct file_operations pktgen_thread_fops = {
L
Luiz Capitulino 已提交
1859 1860 1861 1862 1863 1864
	.owner   = THIS_MODULE,
	.open    = pktgen_thread_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.write   = pktgen_thread_write,
	.release = single_release,
1865
};
L
Linus Torvalds 已提交
1866 1867

/* Think find or remove for NN */
C
Cong Wang 已提交
1868 1869
static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
					      const char *ifname, int remove)
L
Linus Torvalds 已提交
1870 1871 1872
{
	struct pktgen_thread *t;
	struct pktgen_dev *pkt_dev = NULL;
E
Eric Dumazet 已提交
1873
	bool exact = (remove == FIND);
L
Linus Torvalds 已提交
1874

C
Cong Wang 已提交
1875
	list_for_each_entry(t, &pn->pktgen_threads, th_list) {
E
Eric Dumazet 已提交
1876
		pkt_dev = pktgen_find_dev(t, ifname, exact);
L
Linus Torvalds 已提交
1877
		if (pkt_dev) {
L
Luiz Capitulino 已提交
1878 1879 1880 1881 1882 1883
			if (remove) {
				if_lock(t);
				pkt_dev->removal_mark = 1;
				t->control |= T_REMDEV;
				if_unlock(t);
			}
L
Linus Torvalds 已提交
1884 1885 1886
			break;
		}
	}
L
Luiz Capitulino 已提交
1887
	return pkt_dev;
L
Linus Torvalds 已提交
1888 1889
}

1890 1891 1892
/*
 * mark a device for removal
 */
C
Cong Wang 已提交
1893
static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
L
Linus Torvalds 已提交
1894 1895
{
	struct pktgen_dev *pkt_dev = NULL;
1896 1897 1898
	const int max_tries = 10, msec_per_try = 125;
	int i = 0;

1899
	mutex_lock(&pktgen_thread_lock);
J
Joe Perches 已提交
1900
	pr_debug("%s: marking %s for removal\n", __func__, ifname);
1901

L
Luiz Capitulino 已提交
1902
	while (1) {
1903

C
Cong Wang 已提交
1904
		pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
L
Luiz Capitulino 已提交
1905 1906
		if (pkt_dev == NULL)
			break;	/* success */
1907

1908
		mutex_unlock(&pktgen_thread_lock);
J
Joe Perches 已提交
1909 1910
		pr_debug("%s: waiting for %s to disappear....\n",
			 __func__, ifname);
1911
		schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1912
		mutex_lock(&pktgen_thread_lock);
1913 1914

		if (++i >= max_tries) {
J
Joe Perches 已提交
1915 1916
			pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
			       __func__, msec_per_try * i, ifname);
1917 1918 1919 1920 1921
			break;
		}

	}

1922
	mutex_unlock(&pktgen_thread_lock);
1923
}
1924

C
Cong Wang 已提交
1925
static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1926 1927 1928
{
	struct pktgen_thread *t;

C
Cong Wang 已提交
1929
	list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1930 1931 1932 1933 1934 1935
		struct pktgen_dev *pkt_dev;

		list_for_each_entry(pkt_dev, &t->if_list, list) {
			if (pkt_dev->odev != dev)
				continue;

1936
			proc_remove(pkt_dev->entry);
1937

A
Alexey Dobriyan 已提交
1938
			pkt_dev->entry = proc_create_data(dev->name, 0600,
C
Cong Wang 已提交
1939
							  pn->proc_dir,
A
Alexey Dobriyan 已提交
1940 1941
							  &pktgen_if_fops,
							  pkt_dev);
1942
			if (!pkt_dev->entry)
J
Joe Perches 已提交
1943 1944
				pr_err("can't move proc entry for '%s'\n",
				       dev->name);
1945 1946 1947
			break;
		}
	}
L
Linus Torvalds 已提交
1948 1949
}

L
Luiz Capitulino 已提交
1950 1951
static int pktgen_device_event(struct notifier_block *unused,
			       unsigned long event, void *ptr)
L
Linus Torvalds 已提交
1952
{
1953
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
C
Cong Wang 已提交
1954
	struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
L
Linus Torvalds 已提交
1955

C
Cong Wang 已提交
1956
	if (pn->pktgen_exiting)
1957 1958
		return NOTIFY_DONE;

L
Linus Torvalds 已提交
1959 1960 1961 1962 1963
	/* It is OK that we do not hold the group lock right now,
	 * as we run under the RTNL lock.
	 */

	switch (event) {
1964
	case NETDEV_CHANGENAME:
C
Cong Wang 已提交
1965
		pktgen_change_name(pn, dev);
L
Linus Torvalds 已提交
1966
		break;
L
Luiz Capitulino 已提交
1967

L
Linus Torvalds 已提交
1968
	case NETDEV_UNREGISTER:
C
Cong Wang 已提交
1969
		pktgen_mark_device(pn, dev->name);
L
Linus Torvalds 已提交
1970
		break;
1971
	}
L
Linus Torvalds 已提交
1972 1973 1974 1975

	return NOTIFY_DONE;
}

C
Cong Wang 已提交
1976 1977
static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
						 struct pktgen_dev *pkt_dev,
1978
						 const char *ifname)
R
Robert Olsson 已提交
1979 1980
{
	char b[IFNAMSIZ+5];
1981
	int i;
R
Robert Olsson 已提交
1982

1983 1984
	for (i = 0; ifname[i] != '@'; i++) {
		if (i == IFNAMSIZ)
R
Robert Olsson 已提交
1985 1986 1987 1988 1989 1990
			break;

		b[i] = ifname[i];
	}
	b[i] = 0;

C
Cong Wang 已提交
1991
	return dev_get_by_name(pn->net, b);
R
Robert Olsson 已提交
1992 1993 1994
}


L
Linus Torvalds 已提交
1995 1996
/* Associate pktgen_dev with a device. */

C
Cong Wang 已提交
1997 1998
static int pktgen_setup_dev(const struct pktgen_net *pn,
			    struct pktgen_dev *pkt_dev, const char *ifname)
L
Luiz Capitulino 已提交
1999
{
L
Linus Torvalds 已提交
2000
	struct net_device *odev;
2001
	int err;
L
Linus Torvalds 已提交
2002 2003 2004 2005

	/* Clean old setups */
	if (pkt_dev->odev) {
		dev_put(pkt_dev->odev);
L
Luiz Capitulino 已提交
2006 2007
		pkt_dev->odev = NULL;
	}
L
Linus Torvalds 已提交
2008

C
Cong Wang 已提交
2009
	odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
L
Linus Torvalds 已提交
2010
	if (!odev) {
J
Joe Perches 已提交
2011
		pr_err("no such netdevice: \"%s\"\n", ifname);
2012
		return -ENODEV;
L
Linus Torvalds 已提交
2013
	}
2014

L
Linus Torvalds 已提交
2015
	if (odev->type != ARPHRD_ETHER) {
J
Joe Perches 已提交
2016
		pr_err("not an ethernet device: \"%s\"\n", ifname);
2017 2018
		err = -EINVAL;
	} else if (!netif_running(odev)) {
J
Joe Perches 已提交
2019
		pr_err("device is down: \"%s\"\n", ifname);
2020 2021 2022 2023
		err = -ENETDOWN;
	} else {
		pkt_dev->odev = odev;
		return 0;
L
Linus Torvalds 已提交
2024 2025 2026
	}

	dev_put(odev);
2027
	return err;
L
Linus Torvalds 已提交
2028 2029 2030 2031 2032 2033 2034
}

/* Read pkt_dev from the interface and set up internal pktgen_dev
 * structure to have the right information to create/send packets
 */
static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
{
2035 2036
	int ntxq;

L
Luiz Capitulino 已提交
2037
	if (!pkt_dev->odev) {
J
Joe Perches 已提交
2038
		pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
L
Luiz Capitulino 已提交
2039 2040 2041 2042 2043
		sprintf(pkt_dev->result,
			"ERROR: pkt_dev->odev == NULL in setup_inject.\n");
		return;
	}

2044 2045
	/* make sure that we don't pick a non-existing transmit queue */
	ntxq = pkt_dev->odev->real_num_tx_queues;
R
Robert Olsson 已提交
2046

2047
	if (ntxq <= pkt_dev->queue_map_min) {
J
Joe Perches 已提交
2048 2049 2050
		pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
			   pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
			   pkt_dev->odevname);
2051
		pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2052
	}
2053
	if (pkt_dev->queue_map_max >= ntxq) {
J
Joe Perches 已提交
2054 2055 2056
		pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
			   pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
			   pkt_dev->odevname);
2057
		pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2058 2059
	}

L
Luiz Capitulino 已提交
2060
	/* Default to the interface's mac if not explicitly set. */
L
Linus Torvalds 已提交
2061

2062
	if (is_zero_ether_addr(pkt_dev->src_mac))
L
Luiz Capitulino 已提交
2063
		memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
L
Linus Torvalds 已提交
2064

L
Luiz Capitulino 已提交
2065
	/* Set up Dest MAC */
2066
	memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
L
Linus Torvalds 已提交
2067

L
Luiz Capitulino 已提交
2068
	if (pkt_dev->flags & F_IPV6) {
2069 2070 2071
		int i, set = 0, err = 1;
		struct inet6_dev *idev;

2072 2073 2074 2075 2076 2077 2078
		if (pkt_dev->min_pkt_size == 0) {
			pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
						+ sizeof(struct udphdr)
						+ sizeof(struct pktgen_hdr)
						+ pkt_dev->pkt_overhead;
		}

L
Luiz Capitulino 已提交
2079 2080
		for (i = 0; i < IN6_ADDR_HSIZE; i++)
			if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
L
Linus Torvalds 已提交
2081 2082 2083 2084
				set = 1;
				break;
			}

L
Luiz Capitulino 已提交
2085 2086
		if (!set) {

L
Linus Torvalds 已提交
2087 2088 2089 2090 2091 2092
			/*
			 * Use linklevel address if unconfigured.
			 *
			 * use ipv6_get_lladdr if/when it's get exported
			 */

2093
			rcu_read_lock();
2094 2095
			idev = __in6_dev_get(pkt_dev->odev);
			if (idev) {
L
Linus Torvalds 已提交
2096 2097 2098
				struct inet6_ifaddr *ifp;

				read_lock_bh(&idev->lock);
2099 2100
				list_for_each_entry(ifp, &idev->addr_list, if_list) {
					if ((ifp->scope & IFA_LINK) &&
2101
					    !(ifp->flags & IFA_F_TENTATIVE)) {
A
Alexey Dobriyan 已提交
2102
						pkt_dev->cur_in6_saddr = ifp->addr;
L
Linus Torvalds 已提交
2103 2104 2105 2106 2107 2108
						err = 0;
						break;
					}
				}
				read_unlock_bh(&idev->lock);
			}
2109
			rcu_read_unlock();
L
Luiz Capitulino 已提交
2110
			if (err)
J
Joe Perches 已提交
2111
				pr_err("ERROR: IPv6 link address not available\n");
L
Linus Torvalds 已提交
2112
		}
L
Luiz Capitulino 已提交
2113
	} else {
2114 2115 2116 2117 2118 2119 2120
		if (pkt_dev->min_pkt_size == 0) {
			pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
						+ sizeof(struct udphdr)
						+ sizeof(struct pktgen_hdr)
						+ pkt_dev->pkt_overhead;
		}

L
Linus Torvalds 已提交
2121 2122 2123
		pkt_dev->saddr_min = 0;
		pkt_dev->saddr_max = 0;
		if (strlen(pkt_dev->src_min) == 0) {
L
Luiz Capitulino 已提交
2124 2125

			struct in_device *in_dev;
L
Linus Torvalds 已提交
2126 2127

			rcu_read_lock();
2128
			in_dev = __in_dev_get_rcu(pkt_dev->odev);
L
Linus Torvalds 已提交
2129 2130
			if (in_dev) {
				if (in_dev->ifa_list) {
L
Luiz Capitulino 已提交
2131 2132
					pkt_dev->saddr_min =
					    in_dev->ifa_list->ifa_address;
L
Linus Torvalds 已提交
2133 2134 2135 2136
					pkt_dev->saddr_max = pkt_dev->saddr_min;
				}
			}
			rcu_read_unlock();
L
Luiz Capitulino 已提交
2137
		} else {
L
Linus Torvalds 已提交
2138 2139 2140 2141 2142 2143 2144
			pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
			pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
		}

		pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
		pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
	}
L
Luiz Capitulino 已提交
2145
	/* Initialize current values. */
2146 2147 2148 2149
	pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
	if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
		pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;

L
Luiz Capitulino 已提交
2150 2151 2152 2153 2154 2155
	pkt_dev->cur_dst_mac_offset = 0;
	pkt_dev->cur_src_mac_offset = 0;
	pkt_dev->cur_saddr = pkt_dev->saddr_min;
	pkt_dev->cur_daddr = pkt_dev->daddr_min;
	pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
	pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
L
Linus Torvalds 已提交
2156 2157 2158
	pkt_dev->nflows = 0;
}

2159 2160 2161

static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
{
2162
	ktime_t start_time, end_time;
E
Eric Dumazet 已提交
2163
	s64 remaining;
S
Stephen Hemminger 已提交
2164 2165 2166 2167 2168
	struct hrtimer_sleeper t;

	hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
	hrtimer_set_expires(&t.timer, spin_until);

2169
	remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
E
Eric Dumazet 已提交
2170 2171
	if (remaining <= 0) {
		pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
S
Stephen Hemminger 已提交
2172
		return;
E
Eric Dumazet 已提交
2173
	}
S
Stephen Hemminger 已提交
2174

D
Daniel Borkmann 已提交
2175
	start_time = ktime_get();
E
Eric Dumazet 已提交
2176 2177 2178
	if (remaining < 100000) {
		/* for small delays (<100us), just loop until limit is reached */
		do {
D
Daniel Borkmann 已提交
2179 2180
			end_time = ktime_get();
		} while (ktime_compare(end_time, spin_until) < 0);
E
Eric Dumazet 已提交
2181
	} else {
S
Stephen Hemminger 已提交
2182 2183 2184 2185 2186 2187 2188 2189 2190
		/* see do_nanosleep */
		hrtimer_init_sleeper(&t, current);
		do {
			set_current_state(TASK_INTERRUPTIBLE);
			hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
			if (!hrtimer_active(&t.timer))
				t.task = NULL;

			if (likely(t.task))
L
Linus Torvalds 已提交
2191 2192
				schedule();

S
Stephen Hemminger 已提交
2193 2194 2195
			hrtimer_cancel(&t.timer);
		} while (t.task && pkt_dev->running && !signal_pending(current));
		__set_current_state(TASK_RUNNING);
D
Daniel Borkmann 已提交
2196
		end_time = ktime_get();
L
Linus Torvalds 已提交
2197
	}
2198 2199

	pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2200
	pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
L
Linus Torvalds 已提交
2201 2202
}

2203 2204
static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
{
J
Jamal Hadi Salim 已提交
2205
	pkt_dev->pkt_overhead = 0;
2206 2207 2208 2209 2210
	pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
	pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
	pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
}

S
Stephen Hemminger 已提交
2211
static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2212
{
S
Stephen Hemminger 已提交
2213
	return !!(pkt_dev->flows[flow].flags & F_INIT);
2214 2215 2216 2217 2218 2219 2220 2221 2222 2223
}

static inline int f_pick(struct pktgen_dev *pkt_dev)
{
	int flow = pkt_dev->curfl;

	if (pkt_dev->flags & F_FLOW_SEQ) {
		if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
			/* reset time */
			pkt_dev->flows[flow].count = 0;
R
Robert Olsson 已提交
2224
			pkt_dev->flows[flow].flags = 0;
2225 2226 2227 2228 2229
			pkt_dev->curfl += 1;
			if (pkt_dev->curfl >= pkt_dev->cflows)
				pkt_dev->curfl = 0; /*reset */
		}
	} else {
2230
		flow = prandom_u32() % pkt_dev->cflows;
R
Robert Olsson 已提交
2231
		pkt_dev->curfl = flow;
2232

R
Robert Olsson 已提交
2233
		if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2234
			pkt_dev->flows[flow].count = 0;
R
Robert Olsson 已提交
2235 2236
			pkt_dev->flows[flow].flags = 0;
		}
2237 2238 2239 2240 2241
	}

	return pkt_dev->curfl;
}

J
Jamal Hadi Salim 已提交
2242 2243 2244 2245 2246

#ifdef CONFIG_XFRM
/* If there was already an IPSEC SA, we keep it as is, else
 * we go look for it ...
*/
2247
#define DUMMY_MARK 0
2248
static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
J
Jamal Hadi Salim 已提交
2249 2250
{
	struct xfrm_state *x = pkt_dev->flows[flow].x;
C
Cong Wang 已提交
2251
	struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
J
Jamal Hadi Salim 已提交
2252
	if (!x) {
2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267

		if (pkt_dev->spi) {
			/* We need as quick as possible to find the right SA
			 * Searching with minimum criteria to archieve this.
			 */
			x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
		} else {
			/* slow path: we dont already have xfrm_state */
			x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
						(xfrm_address_t *)&pkt_dev->cur_daddr,
						(xfrm_address_t *)&pkt_dev->cur_saddr,
						AF_INET,
						pkt_dev->ipsmode,
						pkt_dev->ipsproto, 0);
		}
J
Jamal Hadi Salim 已提交
2268 2269 2270
		if (x) {
			pkt_dev->flows[flow].x = x;
			set_pkt_overhead(pkt_dev);
2271
			pkt_dev->pkt_overhead += x->props.header_len;
J
Jamal Hadi Salim 已提交
2272 2273 2274 2275 2276
		}

	}
}
#endif
2277 2278
static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
{
R
Robert Olsson 已提交
2279 2280 2281 2282

	if (pkt_dev->flags & F_QUEUE_MAP_CPU)
		pkt_dev->cur_queue_map = smp_processor_id();

E
Eric Dumazet 已提交
2283
	else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2284 2285
		__u16 t;
		if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2286
			t = prandom_u32() %
2287 2288 2289 2290 2291 2292 2293 2294 2295 2296
				(pkt_dev->queue_map_max -
				 pkt_dev->queue_map_min + 1)
				+ pkt_dev->queue_map_min;
		} else {
			t = pkt_dev->cur_queue_map + 1;
			if (t > pkt_dev->queue_map_max)
				t = pkt_dev->queue_map_min;
		}
		pkt_dev->cur_queue_map = t;
	}
R
Robert Olsson 已提交
2297
	pkt_dev->cur_queue_map  = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2298 2299
}

L
Linus Torvalds 已提交
2300 2301 2302
/* Increment/randomize headers according to flags and current values
 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
 */
L
Luiz Capitulino 已提交
2303 2304 2305 2306 2307
static void mod_cur_headers(struct pktgen_dev *pkt_dev)
{
	__u32 imn;
	__u32 imx;
	int flow = 0;
L
Linus Torvalds 已提交
2308

2309 2310
	if (pkt_dev->cflows)
		flow = f_pick(pkt_dev);
L
Linus Torvalds 已提交
2311 2312

	/*  Deal with source MAC */
L
Luiz Capitulino 已提交
2313 2314 2315 2316 2317
	if (pkt_dev->src_mac_count > 1) {
		__u32 mc;
		__u32 tmp;

		if (pkt_dev->flags & F_MACSRC_RND)
2318
			mc = prandom_u32() % pkt_dev->src_mac_count;
L
Luiz Capitulino 已提交
2319 2320
		else {
			mc = pkt_dev->cur_src_mac_offset++;
R
Robert Olsson 已提交
2321
			if (pkt_dev->cur_src_mac_offset >=
L
Luiz Capitulino 已提交
2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343
			    pkt_dev->src_mac_count)
				pkt_dev->cur_src_mac_offset = 0;
		}

		tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
		pkt_dev->hh[11] = tmp;
		tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
		pkt_dev->hh[10] = tmp;
		tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
		pkt_dev->hh[9] = tmp;
		tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
		pkt_dev->hh[8] = tmp;
		tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
		pkt_dev->hh[7] = tmp;
	}

	/*  Deal with Destination MAC */
	if (pkt_dev->dst_mac_count > 1) {
		__u32 mc;
		__u32 tmp;

		if (pkt_dev->flags & F_MACDST_RND)
2344
			mc = prandom_u32() % pkt_dev->dst_mac_count;
L
Luiz Capitulino 已提交
2345 2346 2347

		else {
			mc = pkt_dev->cur_dst_mac_offset++;
R
Robert Olsson 已提交
2348
			if (pkt_dev->cur_dst_mac_offset >=
L
Luiz Capitulino 已提交
2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365
			    pkt_dev->dst_mac_count) {
				pkt_dev->cur_dst_mac_offset = 0;
			}
		}

		tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
		pkt_dev->hh[5] = tmp;
		tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
		pkt_dev->hh[4] = tmp;
		tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
		pkt_dev->hh[3] = tmp;
		tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
		pkt_dev->hh[2] = tmp;
		tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
		pkt_dev->hh[1] = tmp;
	}

2366
	if (pkt_dev->flags & F_MPLS_RND) {
2367
		unsigned int i;
2368
		for (i = 0; i < pkt_dev->nr_labels; i++)
2369 2370
			if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
				pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2371
					     ((__force __be32)prandom_u32() &
2372 2373 2374
						      htonl(0x000fffff));
	}

F
Francesco Fondelli 已提交
2375
	if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2376
		pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
F
Francesco Fondelli 已提交
2377 2378 2379
	}

	if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2380
		pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
F
Francesco Fondelli 已提交
2381 2382
	}

L
Luiz Capitulino 已提交
2383 2384
	if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
		if (pkt_dev->flags & F_UDPSRC_RND)
2385
			pkt_dev->cur_udp_src = prandom_u32() %
S
Stephen Hemminger 已提交
2386 2387
				(pkt_dev->udp_src_max - pkt_dev->udp_src_min)
				+ pkt_dev->udp_src_min;
L
Luiz Capitulino 已提交
2388 2389

		else {
L
Linus Torvalds 已提交
2390 2391 2392
			pkt_dev->cur_udp_src++;
			if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
				pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
L
Luiz Capitulino 已提交
2393 2394 2395 2396 2397
		}
	}

	if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
		if (pkt_dev->flags & F_UDPDST_RND) {
2398
			pkt_dev->cur_udp_dst = prandom_u32() %
S
Stephen Hemminger 已提交
2399 2400
				(pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
				+ pkt_dev->udp_dst_min;
L
Luiz Capitulino 已提交
2401
		} else {
L
Linus Torvalds 已提交
2402
			pkt_dev->cur_udp_dst++;
L
Luiz Capitulino 已提交
2403
			if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
L
Linus Torvalds 已提交
2404
				pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
L
Luiz Capitulino 已提交
2405 2406
		}
	}
L
Linus Torvalds 已提交
2407 2408 2409

	if (!(pkt_dev->flags & F_IPV6)) {

2410 2411 2412
		imn = ntohl(pkt_dev->saddr_min);
		imx = ntohl(pkt_dev->saddr_max);
		if (imn < imx) {
L
Linus Torvalds 已提交
2413
			__u32 t;
L
Luiz Capitulino 已提交
2414
			if (pkt_dev->flags & F_IPSRC_RND)
2415
				t = prandom_u32() % (imx - imn) + imn;
L
Linus Torvalds 已提交
2416 2417 2418
			else {
				t = ntohl(pkt_dev->cur_saddr);
				t++;
2419
				if (t > imx)
L
Linus Torvalds 已提交
2420
					t = imn;
2421

L
Linus Torvalds 已提交
2422 2423 2424
			}
			pkt_dev->cur_saddr = htonl(t);
		}
L
Luiz Capitulino 已提交
2425

2426
		if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
L
Linus Torvalds 已提交
2427 2428
			pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
		} else {
A
Al Viro 已提交
2429 2430 2431
			imn = ntohl(pkt_dev->daddr_min);
			imx = ntohl(pkt_dev->daddr_max);
			if (imn < imx) {
L
Linus Torvalds 已提交
2432
				__u32 t;
A
Al Viro 已提交
2433
				__be32 s;
L
Linus Torvalds 已提交
2434 2435
				if (pkt_dev->flags & F_IPDST_RND) {

2436
					do {
2437 2438
						t = prandom_u32() %
							(imx - imn) + imn;
A
Al Viro 已提交
2439
						s = htonl(t);
2440 2441 2442 2443 2444
					} while (ipv4_is_loopback(s) ||
						ipv4_is_multicast(s) ||
						ipv4_is_lbcast(s) ||
						ipv4_is_zeronet(s) ||
						ipv4_is_local_multicast(s));
A
Al Viro 已提交
2445 2446
					pkt_dev->cur_daddr = s;
				} else {
L
Linus Torvalds 已提交
2447 2448 2449 2450 2451 2452 2453 2454
					t = ntohl(pkt_dev->cur_daddr);
					t++;
					if (t > imx) {
						t = imn;
					}
					pkt_dev->cur_daddr = htonl(t);
				}
			}
L
Luiz Capitulino 已提交
2455
			if (pkt_dev->cflows) {
2456
				pkt_dev->flows[flow].flags |= F_INIT;
L
Luiz Capitulino 已提交
2457 2458
				pkt_dev->flows[flow].cur_daddr =
				    pkt_dev->cur_daddr;
J
Jamal Hadi Salim 已提交
2459 2460 2461 2462
#ifdef CONFIG_XFRM
				if (pkt_dev->flags & F_IPSEC_ON)
					get_ipsec_sa(pkt_dev, flow);
#endif
L
Linus Torvalds 已提交
2463 2464 2465
				pkt_dev->nflows++;
			}
		}
L
Luiz Capitulino 已提交
2466 2467
	} else {		/* IPV6 * */

J
Joe Perches 已提交
2468
		if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
L
Linus Torvalds 已提交
2469 2470 2471 2472
			int i;

			/* Only random destinations yet */

L
Luiz Capitulino 已提交
2473
			for (i = 0; i < 4; i++) {
L
Linus Torvalds 已提交
2474
				pkt_dev->cur_in6_daddr.s6_addr32[i] =
2475
				    (((__force __be32)prandom_u32() |
L
Luiz Capitulino 已提交
2476 2477
				      pkt_dev->min_in6_daddr.s6_addr32[i]) &
				     pkt_dev->max_in6_daddr.s6_addr32[i]);
L
Linus Torvalds 已提交
2478
			}
L
Luiz Capitulino 已提交
2479
		}
L
Linus Torvalds 已提交
2480 2481
	}

L
Luiz Capitulino 已提交
2482 2483 2484
	if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
		__u32 t;
		if (pkt_dev->flags & F_TXSIZE_RND) {
2485
			t = prandom_u32() %
S
Stephen Hemminger 已提交
2486 2487
				(pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
				+ pkt_dev->min_pkt_size;
L
Luiz Capitulino 已提交
2488
		} else {
L
Linus Torvalds 已提交
2489
			t = pkt_dev->cur_pkt_size + 1;
L
Luiz Capitulino 已提交
2490
			if (t > pkt_dev->max_pkt_size)
L
Linus Torvalds 已提交
2491
				t = pkt_dev->min_pkt_size;
L
Luiz Capitulino 已提交
2492 2493 2494
		}
		pkt_dev->cur_pkt_size = t;
	}
L
Linus Torvalds 已提交
2495

2496
	set_cur_queue_map(pkt_dev);
R
Robert Olsson 已提交
2497

L
Linus Torvalds 已提交
2498 2499 2500
	pkt_dev->flows[flow].count++;
}

J
Jamal Hadi Salim 已提交
2501 2502

#ifdef CONFIG_XFRM
2503
static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2504 2505 2506 2507

	[RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
};

J
Jamal Hadi Salim 已提交
2508 2509 2510 2511
static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
{
	struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
	int err = 0;
2512
	struct net *net = dev_net(pkt_dev->odev);
J
Jamal Hadi Salim 已提交
2513 2514 2515 2516 2517

	if (!x)
		return 0;
	/* XXX: we dont support tunnel mode for now until
	 * we resolve the dst issue */
2518
	if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
J
Jamal Hadi Salim 已提交
2519 2520
		return 0;

2521 2522 2523 2524 2525 2526 2527
	/* But when user specify an valid SPI, transformation
	 * supports both transport/tunnel mode + ESP/AH type.
	 */
	if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
		skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;

	rcu_read_lock_bh();
2528
	err = x->outer_mode->output(x, skb);
2529
	rcu_read_unlock_bh();
2530 2531
	if (err) {
		XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
J
Jamal Hadi Salim 已提交
2532
		goto error;
2533
	}
J
Jamal Hadi Salim 已提交
2534
	err = x->type->output(x, skb);
2535 2536
	if (err) {
		XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
J
Jamal Hadi Salim 已提交
2537
		goto error;
2538
	}
2539
	spin_lock_bh(&x->lock);
2540
	x->curlft.bytes += skb->len;
J
Jamal Hadi Salim 已提交
2541
	x->curlft.packets++;
2542
	spin_unlock_bh(&x->lock);
J
Jamal Hadi Salim 已提交
2543 2544 2545 2546
error:
	return err;
}

S
Stephen Hemminger 已提交
2547
static void free_SAs(struct pktgen_dev *pkt_dev)
J
Jamal Hadi Salim 已提交
2548 2549 2550
{
	if (pkt_dev->cflows) {
		/* let go of the SAs if we have them */
2551 2552
		int i;
		for (i = 0; i < pkt_dev->cflows; i++) {
J
Jamal Hadi Salim 已提交
2553 2554 2555 2556 2557 2558 2559 2560 2561
			struct xfrm_state *x = pkt_dev->flows[i].x;
			if (x) {
				xfrm_state_put(x);
				pkt_dev->flows[i].x = NULL;
			}
		}
	}
}

S
Stephen Hemminger 已提交
2562
static int process_ipsec(struct pktgen_dev *pkt_dev,
J
Jamal Hadi Salim 已提交
2563 2564 2565 2566 2567 2568 2569 2570
			      struct sk_buff *skb, __be16 protocol)
{
	if (pkt_dev->flags & F_IPSEC_ON) {
		struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
		int nhead = 0;
		if (x) {
			int ret;
			__u8 *eth;
2571 2572
			struct iphdr *iph;

J
Jamal Hadi Salim 已提交
2573
			nhead = x->props.header_len - skb_headroom(skb);
2574
			if (nhead > 0) {
J
Jamal Hadi Salim 已提交
2575 2576
				ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
				if (ret < 0) {
J
Joe Perches 已提交
2577 2578
					pr_err("Error expanding ipsec packet %d\n",
					       ret);
2579
					goto err;
J
Jamal Hadi Salim 已提交
2580 2581 2582 2583 2584 2585 2586
				}
			}

			/* ipsec is not expecting ll header */
			skb_pull(skb, ETH_HLEN);
			ret = pktgen_output_ipsec(skb, pkt_dev);
			if (ret) {
J
Joe Perches 已提交
2587
				pr_err("Error creating ipsec packet %d\n", ret);
2588
				goto err;
J
Jamal Hadi Salim 已提交
2589 2590 2591 2592
			}
			/* restore ll */
			eth = (__u8 *) skb_push(skb, ETH_HLEN);
			memcpy(eth, pkt_dev->hh, 12);
2593
			*(u16 *) &eth[12] = protocol;
2594 2595 2596 2597 2598

			/* Update IPv4 header len as well as checksum value */
			iph = ip_hdr(skb);
			iph->tot_len = htons(skb->len - ETH_HLEN);
			ip_send_check(iph);
J
Jamal Hadi Salim 已提交
2599 2600 2601
		}
	}
	return 1;
2602 2603 2604
err:
	kfree_skb(skb);
	return 0;
J
Jamal Hadi Salim 已提交
2605 2606 2607
}
#endif

2608 2609
static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
{
2610
	unsigned int i;
2611
	for (i = 0; i < pkt_dev->nr_labels; i++)
2612
		*mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2613

2614 2615 2616 2617
	mpls--;
	*mpls |= MPLS_STACK_BOTTOM;
}

A
Al Viro 已提交
2618 2619 2620 2621 2622 2623
static inline __be16 build_tci(unsigned int id, unsigned int cfi,
			       unsigned int prio)
{
	return htons(id | (cfi << 12) | (prio << 13));
}

E
Eric Dumazet 已提交
2624 2625 2626 2627 2628 2629 2630 2631 2632 2633
static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
				int datalen)
{
	struct timeval timestamp;
	struct pktgen_hdr *pgh;

	pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
	datalen -= sizeof(*pgh);

	if (pkt_dev->nfrags <= 0) {
2634
		memset(skb_put(skb, datalen), 0, datalen);
E
Eric Dumazet 已提交
2635 2636 2637
	} else {
		int frags = pkt_dev->nfrags;
		int i, len;
2638
		int frag_len;
E
Eric Dumazet 已提交
2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649


		if (frags > MAX_SKB_FRAGS)
			frags = MAX_SKB_FRAGS;
		len = datalen - frags * PAGE_SIZE;
		if (len > 0) {
			memset(skb_put(skb, len), 0, len);
			datalen = frags * PAGE_SIZE;
		}

		i = 0;
2650 2651
		frag_len = (datalen/frags) < PAGE_SIZE ?
			   (datalen/frags) : PAGE_SIZE;
E
Eric Dumazet 已提交
2652 2653 2654 2655 2656 2657 2658 2659 2660 2661
		while (datalen > 0) {
			if (unlikely(!pkt_dev->page)) {
				int node = numa_node_id();

				if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
					node = pkt_dev->node;
				pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
				if (!pkt_dev->page)
					break;
			}
2662
			get_page(pkt_dev->page);
2663
			skb_frag_set_page(skb, i, pkt_dev->page);
E
Eric Dumazet 已提交
2664
			skb_shinfo(skb)->frags[i].page_offset = 0;
2665 2666
			/*last fragment, fill rest of data*/
			if (i == (frags - 1))
E
Eric Dumazet 已提交
2667 2668
				skb_frag_size_set(&skb_shinfo(skb)->frags[i],
				    (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2669
			else
E
Eric Dumazet 已提交
2670 2671 2672 2673
				skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
			datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
			skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
			skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
E
Eric Dumazet 已提交
2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689
			i++;
			skb_shinfo(skb)->nr_frags = i;
		}
	}

	/* Stamp the time, and sequence number,
	 * convert them to network byte order
	 */
	pgh->pgh_magic = htonl(PKTGEN_MAGIC);
	pgh->seq_num = htonl(pkt_dev->seq_num);

	do_gettimeofday(&timestamp);
	pgh->tv_sec = htonl(timestamp.tv_sec);
	pgh->tv_usec = htonl(timestamp.tv_usec);
}

2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712
static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
					struct pktgen_dev *pkt_dev,
					unsigned int extralen)
{
	struct sk_buff *skb = NULL;
	unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
			    pkt_dev->pkt_overhead;

	if (pkt_dev->flags & F_NODE) {
		int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();

		skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
		if (likely(skb)) {
			skb_reserve(skb, NET_SKB_PAD);
			skb->dev = dev;
		}
	} else {
		 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
	}

	return skb;
}

L
Luiz Capitulino 已提交
2713 2714
static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
					struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
2715 2716 2717 2718 2719 2720
{
	struct sk_buff *skb = NULL;
	__u8 *eth;
	struct udphdr *udph;
	int datalen, iplen;
	struct iphdr *iph;
2721
	__be16 protocol = htons(ETH_P_IP);
2722
	__be32 *mpls;
F
Francesco Fondelli 已提交
2723 2724 2725 2726
	__be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
	__be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
	__be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
	__be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2727
	u16 queue_map;
2728 2729

	if (pkt_dev->nr_labels)
2730
		protocol = htons(ETH_P_MPLS_UC);
L
Luiz Capitulino 已提交
2731

F
Francesco Fondelli 已提交
2732
	if (pkt_dev->vlan_id != 0xffff)
2733
		protocol = htons(ETH_P_8021Q);
F
Francesco Fondelli 已提交
2734

2735 2736 2737 2738
	/* Update any of the values, used when we're incrementing various
	 * fields.
	 */
	mod_cur_headers(pkt_dev);
2739
	queue_map = pkt_dev->cur_queue_map;
2740

2741
	datalen = (odev->hard_header_len + 16) & ~0xf;
R
Robert Olsson 已提交
2742

2743
	skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
L
Linus Torvalds 已提交
2744 2745 2746 2747 2748
	if (!skb) {
		sprintf(pkt_dev->result, "No memory");
		return NULL;
	}

2749
	prefetchw(skb->data);
2750
	skb_reserve(skb, datalen);
L
Linus Torvalds 已提交
2751 2752 2753

	/*  Reserve for ethernet and IP header  */
	eth = (__u8 *) skb_push(skb, 14);
2754 2755 2756
	mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
	if (pkt_dev->nr_labels)
		mpls_push(mpls, pkt_dev);
F
Francesco Fondelli 已提交
2757 2758

	if (pkt_dev->vlan_id != 0xffff) {
2759
		if (pkt_dev->svlan_id != 0xffff) {
F
Francesco Fondelli 已提交
2760
			svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
A
Al Viro 已提交
2761 2762 2763
			*svlan_tci = build_tci(pkt_dev->svlan_id,
					       pkt_dev->svlan_cfi,
					       pkt_dev->svlan_p);
F
Francesco Fondelli 已提交
2764
			svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2765
			*svlan_encapsulated_proto = htons(ETH_P_8021Q);
F
Francesco Fondelli 已提交
2766 2767
		}
		vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
A
Al Viro 已提交
2768 2769 2770
		*vlan_tci = build_tci(pkt_dev->vlan_id,
				      pkt_dev->vlan_cfi,
				      pkt_dev->vlan_p);
F
Francesco Fondelli 已提交
2771
		vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2772
		*vlan_encapsulated_proto = htons(ETH_P_IP);
F
Francesco Fondelli 已提交
2773 2774
	}

2775 2776 2777 2778 2779 2780
	skb_set_mac_header(skb, 0);
	skb_set_network_header(skb, skb->len);
	iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));

	skb_set_transport_header(skb, skb->len);
	udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2781
	skb_set_queue_mapping(skb, queue_map);
J
John Fastabend 已提交
2782 2783
	skb->priority = pkt_dev->skb_priority;

L
Linus Torvalds 已提交
2784
	memcpy(eth, pkt_dev->hh, 12);
A
Al Viro 已提交
2785
	*(__be16 *) & eth[12] = protocol;
L
Linus Torvalds 已提交
2786

2787 2788
	/* Eth + IPh + UDPh + mpls */
	datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2789
		  pkt_dev->pkt_overhead;
2790
	if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
L
Linus Torvalds 已提交
2791
		datalen = sizeof(struct pktgen_hdr);
L
Luiz Capitulino 已提交
2792

L
Linus Torvalds 已提交
2793 2794
	udph->source = htons(pkt_dev->cur_udp_src);
	udph->dest = htons(pkt_dev->cur_udp_dst);
L
Luiz Capitulino 已提交
2795
	udph->len = htons(datalen + 8);	/* DATA + udphdr */
2796
	udph->check = 0;
L
Linus Torvalds 已提交
2797 2798 2799 2800

	iph->ihl = 5;
	iph->version = 4;
	iph->ttl = 32;
F
Francesco Fondelli 已提交
2801
	iph->tos = pkt_dev->tos;
L
Luiz Capitulino 已提交
2802
	iph->protocol = IPPROTO_UDP;	/* UDP */
L
Linus Torvalds 已提交
2803 2804
	iph->saddr = pkt_dev->cur_saddr;
	iph->daddr = pkt_dev->cur_daddr;
E
Eric Dumazet 已提交
2805 2806
	iph->id = htons(pkt_dev->ip_id);
	pkt_dev->ip_id++;
L
Linus Torvalds 已提交
2807 2808 2809
	iph->frag_off = 0;
	iplen = 20 + 8 + datalen;
	iph->tot_len = htons(iplen);
2810
	ip_send_check(iph);
2811
	skb->protocol = protocol;
L
Linus Torvalds 已提交
2812 2813
	skb->dev = odev;
	skb->pkt_type = PACKET_HOST;
2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831

	if (!(pkt_dev->flags & F_UDPCSUM)) {
		skb->ip_summed = CHECKSUM_NONE;
	} else if (odev->features & NETIF_F_V4_CSUM) {
		skb->ip_summed = CHECKSUM_PARTIAL;
		skb->csum = 0;
		udp4_hwcsum(skb, udph->source, udph->dest);
	} else {
		__wsum csum = udp_csum(skb);

		/* add protocol-dependent pseudo-header */
		udph->check = csum_tcpudp_magic(udph->source, udph->dest,
						datalen + 8, IPPROTO_UDP, csum);

		if (udph->check == 0)
			udph->check = CSUM_MANGLED_0;
	}

E
Eric Dumazet 已提交
2832
	pktgen_finalize_skb(pkt_dev, skb, datalen);
L
Linus Torvalds 已提交
2833

J
Jamal Hadi Salim 已提交
2834 2835 2836 2837 2838
#ifdef CONFIG_XFRM
	if (!process_ipsec(pkt_dev, skb, protocol))
		return NULL;
#endif

L
Linus Torvalds 已提交
2839 2840 2841
	return skb;
}

L
Luiz Capitulino 已提交
2842 2843
static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
					struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
2844 2845 2846 2847
{
	struct sk_buff *skb = NULL;
	__u8 *eth;
	struct udphdr *udph;
2848
	int datalen, udplen;
L
Linus Torvalds 已提交
2849
	struct ipv6hdr *iph;
2850
	__be16 protocol = htons(ETH_P_IPV6);
2851
	__be32 *mpls;
F
Francesco Fondelli 已提交
2852 2853 2854 2855
	__be16 *vlan_tci = NULL;                 /* Encapsulates priority and VLAN ID */
	__be16 *vlan_encapsulated_proto = NULL;  /* packet type ID field (or len) for VLAN tag */
	__be16 *svlan_tci = NULL;                /* Encapsulates priority and SVLAN ID */
	__be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2856
	u16 queue_map;
2857 2858

	if (pkt_dev->nr_labels)
2859
		protocol = htons(ETH_P_MPLS_UC);
2860

F
Francesco Fondelli 已提交
2861
	if (pkt_dev->vlan_id != 0xffff)
2862
		protocol = htons(ETH_P_8021Q);
F
Francesco Fondelli 已提交
2863

2864 2865 2866 2867
	/* Update any of the values, used when we're incrementing various
	 * fields.
	 */
	mod_cur_headers(pkt_dev);
2868
	queue_map = pkt_dev->cur_queue_map;
2869

2870
	skb = pktgen_alloc_skb(odev, pkt_dev, 16);
L
Linus Torvalds 已提交
2871 2872 2873 2874 2875
	if (!skb) {
		sprintf(pkt_dev->result, "No memory");
		return NULL;
	}

2876
	prefetchw(skb->data);
L
Linus Torvalds 已提交
2877 2878 2879 2880
	skb_reserve(skb, 16);

	/*  Reserve for ethernet and IP header  */
	eth = (__u8 *) skb_push(skb, 14);
2881 2882 2883
	mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
	if (pkt_dev->nr_labels)
		mpls_push(mpls, pkt_dev);
F
Francesco Fondelli 已提交
2884 2885

	if (pkt_dev->vlan_id != 0xffff) {
2886
		if (pkt_dev->svlan_id != 0xffff) {
F
Francesco Fondelli 已提交
2887
			svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
A
Al Viro 已提交
2888 2889 2890
			*svlan_tci = build_tci(pkt_dev->svlan_id,
					       pkt_dev->svlan_cfi,
					       pkt_dev->svlan_p);
F
Francesco Fondelli 已提交
2891
			svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2892
			*svlan_encapsulated_proto = htons(ETH_P_8021Q);
F
Francesco Fondelli 已提交
2893 2894
		}
		vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
A
Al Viro 已提交
2895 2896 2897
		*vlan_tci = build_tci(pkt_dev->vlan_id,
				      pkt_dev->vlan_cfi,
				      pkt_dev->vlan_p);
F
Francesco Fondelli 已提交
2898
		vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2899
		*vlan_encapsulated_proto = htons(ETH_P_IPV6);
F
Francesco Fondelli 已提交
2900 2901
	}

2902 2903 2904 2905 2906 2907
	skb_set_mac_header(skb, 0);
	skb_set_network_header(skb, skb->len);
	iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));

	skb_set_transport_header(skb, skb->len);
	udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2908
	skb_set_queue_mapping(skb, queue_map);
J
John Fastabend 已提交
2909
	skb->priority = pkt_dev->skb_priority;
L
Linus Torvalds 已提交
2910 2911

	memcpy(eth, pkt_dev->hh, 12);
2912
	*(__be16 *) &eth[12] = protocol;
2913

2914 2915 2916
	/* Eth + IPh + UDPh + mpls */
	datalen = pkt_dev->cur_pkt_size - 14 -
		  sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2917
		  pkt_dev->pkt_overhead;
L
Linus Torvalds 已提交
2918

2919
	if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
L
Linus Torvalds 已提交
2920
		datalen = sizeof(struct pktgen_hdr);
2921
		net_info_ratelimited("increased datalen to %d\n", datalen);
L
Linus Torvalds 已提交
2922 2923
	}

2924
	udplen = datalen + sizeof(struct udphdr);
L
Linus Torvalds 已提交
2925 2926
	udph->source = htons(pkt_dev->cur_udp_src);
	udph->dest = htons(pkt_dev->cur_udp_dst);
2927 2928
	udph->len = htons(udplen);
	udph->check = 0;
L
Linus Torvalds 已提交
2929

2930
	*(__be32 *) iph = htonl(0x60000000);	/* Version + flow */
L
Linus Torvalds 已提交
2931

F
Francesco Fondelli 已提交
2932 2933
	if (pkt_dev->traffic_class) {
		/* Version + traffic class + flow (0) */
A
Al Viro 已提交
2934
		*(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
F
Francesco Fondelli 已提交
2935 2936
	}

L
Linus Torvalds 已提交
2937 2938
	iph->hop_limit = 32;

2939
	iph->payload_len = htons(udplen);
L
Linus Torvalds 已提交
2940 2941
	iph->nexthdr = IPPROTO_UDP;

A
Alexey Dobriyan 已提交
2942 2943
	iph->daddr = pkt_dev->cur_in6_daddr;
	iph->saddr = pkt_dev->cur_in6_saddr;
L
Linus Torvalds 已提交
2944

2945
	skb->protocol = protocol;
L
Linus Torvalds 已提交
2946 2947 2948
	skb->dev = odev;
	skb->pkt_type = PACKET_HOST;

2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965
	if (!(pkt_dev->flags & F_UDPCSUM)) {
		skb->ip_summed = CHECKSUM_NONE;
	} else if (odev->features & NETIF_F_V6_CSUM) {
		skb->ip_summed = CHECKSUM_PARTIAL;
		skb->csum_start = skb_transport_header(skb) - skb->head;
		skb->csum_offset = offsetof(struct udphdr, check);
		udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
	} else {
		__wsum csum = udp_csum(skb);

		/* add protocol-dependent pseudo-header */
		udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);

		if (udph->check == 0)
			udph->check = CSUM_MANGLED_0;
	}

E
Eric Dumazet 已提交
2966
	pktgen_finalize_skb(pkt_dev, skb, datalen);
L
Luiz Capitulino 已提交
2967

L
Linus Torvalds 已提交
2968 2969 2970
	return skb;
}

S
Stephen Hemminger 已提交
2971 2972
static struct sk_buff *fill_packet(struct net_device *odev,
				   struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
2973
{
L
Luiz Capitulino 已提交
2974
	if (pkt_dev->flags & F_IPV6)
L
Linus Torvalds 已提交
2975 2976 2977 2978 2979
		return fill_packet_ipv6(odev, pkt_dev);
	else
		return fill_packet_ipv4(odev, pkt_dev);
}

L
Luiz Capitulino 已提交
2980
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
2981
{
L
Luiz Capitulino 已提交
2982 2983
	pkt_dev->seq_num = 1;
	pkt_dev->idle_acc = 0;
L
Linus Torvalds 已提交
2984
	pkt_dev->sofar = 0;
L
Luiz Capitulino 已提交
2985 2986
	pkt_dev->tx_bytes = 0;
	pkt_dev->errors = 0;
L
Linus Torvalds 已提交
2987 2988 2989 2990 2991 2992
}

/* Set up structure for sending pkts, clear counters */

static void pktgen_run(struct pktgen_thread *t)
{
2993
	struct pktgen_dev *pkt_dev;
L
Linus Torvalds 已提交
2994 2995
	int started = 0;

J
Joe Perches 已提交
2996
	func_enter();
L
Linus Torvalds 已提交
2997 2998

	if_lock(t);
2999
	list_for_each_entry(pkt_dev, &t->if_list, list) {
L
Linus Torvalds 已提交
3000 3001 3002 3003 3004 3005

		/*
		 * setup odev and create initial packet.
		 */
		pktgen_setup_inject(pkt_dev);

L
Luiz Capitulino 已提交
3006
		if (pkt_dev->odev) {
L
Linus Torvalds 已提交
3007
			pktgen_clear_counters(pkt_dev);
L
Luiz Capitulino 已提交
3008
			pkt_dev->running = 1;	/* Cranke yeself! */
L
Linus Torvalds 已提交
3009
			pkt_dev->skb = NULL;
D
Daniel Borkmann 已提交
3010
			pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3011

3012
			set_pkt_overhead(pkt_dev);
L
Luiz Capitulino 已提交
3013

L
Linus Torvalds 已提交
3014 3015
			strcpy(pkt_dev->result, "Starting");
			started++;
L
Luiz Capitulino 已提交
3016
		} else
L
Linus Torvalds 已提交
3017 3018 3019
			strcpy(pkt_dev->result, "Error starting");
	}
	if_unlock(t);
L
Luiz Capitulino 已提交
3020 3021
	if (started)
		t->control &= ~(T_STOP);
L
Linus Torvalds 已提交
3022 3023
}

C
Cong Wang 已提交
3024
static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
L
Linus Torvalds 已提交
3025
{
3026
	struct pktgen_thread *t;
L
Linus Torvalds 已提交
3027

J
Joe Perches 已提交
3028
	func_enter();
L
Linus Torvalds 已提交
3029

3030
	mutex_lock(&pktgen_thread_lock);
3031

C
Cong Wang 已提交
3032
	list_for_each_entry(t, &pn->pktgen_threads, th_list)
3033
		t->control |= T_STOP;
3034

3035
	mutex_unlock(&pktgen_thread_lock);
L
Linus Torvalds 已提交
3036 3037
}

S
Stephen Hemminger 已提交
3038
static int thread_is_running(const struct pktgen_thread *t)
L
Linus Torvalds 已提交
3039
{
S
Stephen Hemminger 已提交
3040
	const struct pktgen_dev *pkt_dev;
L
Linus Torvalds 已提交
3041

3042
	list_for_each_entry(pkt_dev, &t->if_list, list)
S
Stephen Hemminger 已提交
3043 3044 3045
		if (pkt_dev->running)
			return 1;
	return 0;
L
Linus Torvalds 已提交
3046 3047
}

L
Luiz Capitulino 已提交
3048
static int pktgen_wait_thread_run(struct pktgen_thread *t)
L
Linus Torvalds 已提交
3049
{
L
Luiz Capitulino 已提交
3050
	if_lock(t);
L
Linus Torvalds 已提交
3051

L
Luiz Capitulino 已提交
3052
	while (thread_is_running(t)) {
L
Linus Torvalds 已提交
3053

L
Luiz Capitulino 已提交
3054
		if_unlock(t);
L
Linus Torvalds 已提交
3055

L
Luiz Capitulino 已提交
3056
		msleep_interruptible(100);
L
Linus Torvalds 已提交
3057

L
Luiz Capitulino 已提交
3058 3059 3060 3061 3062 3063 3064 3065
		if (signal_pending(current))
			goto signal;
		if_lock(t);
	}
	if_unlock(t);
	return 1;
signal:
	return 0;
L
Linus Torvalds 已提交
3066 3067
}

C
Cong Wang 已提交
3068
static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
L
Linus Torvalds 已提交
3069
{
3070
	struct pktgen_thread *t;
L
Linus Torvalds 已提交
3071
	int sig = 1;
L
Luiz Capitulino 已提交
3072

3073
	mutex_lock(&pktgen_thread_lock);
3074

C
Cong Wang 已提交
3075
	list_for_each_entry(t, &pn->pktgen_threads, th_list) {
L
Linus Torvalds 已提交
3076
		sig = pktgen_wait_thread_run(t);
L
Luiz Capitulino 已提交
3077 3078
		if (sig == 0)
			break;
L
Linus Torvalds 已提交
3079
	}
3080 3081

	if (sig == 0)
C
Cong Wang 已提交
3082
		list_for_each_entry(t, &pn->pktgen_threads, th_list)
L
Linus Torvalds 已提交
3083
			t->control |= (T_STOP);
3084

3085
	mutex_unlock(&pktgen_thread_lock);
L
Linus Torvalds 已提交
3086 3087 3088
	return sig;
}

C
Cong Wang 已提交
3089
static void pktgen_run_all_threads(struct pktgen_net *pn)
L
Linus Torvalds 已提交
3090
{
3091
	struct pktgen_thread *t;
L
Linus Torvalds 已提交
3092

J
Joe Perches 已提交
3093
	func_enter();
L
Linus Torvalds 已提交
3094

3095
	mutex_lock(&pktgen_thread_lock);
L
Linus Torvalds 已提交
3096

C
Cong Wang 已提交
3097
	list_for_each_entry(t, &pn->pktgen_threads, th_list)
L
Linus Torvalds 已提交
3098
		t->control |= (T_RUN);
3099

3100
	mutex_unlock(&pktgen_thread_lock);
L
Linus Torvalds 已提交
3101

3102 3103
	/* Propagate thread->control  */
	schedule_timeout_interruptible(msecs_to_jiffies(125));
L
Luiz Capitulino 已提交
3104

C
Cong Wang 已提交
3105
	pktgen_wait_all_threads_run(pn);
L
Linus Torvalds 已提交
3106 3107
}

C
Cong Wang 已提交
3108
static void pktgen_reset_all_threads(struct pktgen_net *pn)
3109 3110 3111
{
	struct pktgen_thread *t;

J
Joe Perches 已提交
3112
	func_enter();
3113 3114 3115

	mutex_lock(&pktgen_thread_lock);

C
Cong Wang 已提交
3116
	list_for_each_entry(t, &pn->pktgen_threads, th_list)
3117 3118 3119 3120
		t->control |= (T_REMDEVALL);

	mutex_unlock(&pktgen_thread_lock);

3121 3122
	/* Propagate thread->control  */
	schedule_timeout_interruptible(msecs_to_jiffies(125));
3123

C
Cong Wang 已提交
3124
	pktgen_wait_all_threads_run(pn);
3125 3126
}

L
Linus Torvalds 已提交
3127 3128
static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
{
3129
	__u64 bps, mbps, pps;
L
Luiz Capitulino 已提交
3130
	char *p = pkt_dev->result;
3131 3132 3133 3134
	ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
				    pkt_dev->started_at);
	ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);

3135
	p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3136 3137 3138
		     (unsigned long long)ktime_to_us(elapsed),
		     (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
		     (unsigned long long)ktime_to_us(idle),
L
Luiz Capitulino 已提交
3139 3140 3141
		     (unsigned long long)pkt_dev->sofar,
		     pkt_dev->cur_pkt_size, nr_frags);

3142 3143
	pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
			ktime_to_ns(elapsed));
L
Luiz Capitulino 已提交
3144 3145 3146 3147 3148 3149 3150 3151 3152 3153

	bps = pps * 8 * pkt_dev->cur_pkt_size;

	mbps = bps;
	do_div(mbps, 1000000);
	p += sprintf(p, "  %llupps %lluMb/sec (%llubps) errors: %llu",
		     (unsigned long long)pps,
		     (unsigned long long)mbps,
		     (unsigned long long)bps,
		     (unsigned long long)pkt_dev->errors);
L
Linus Torvalds 已提交
3154 3155 3156
}

/* Set stopped-at timer, remove from running list, do counters & statistics */
L
Luiz Capitulino 已提交
3157
static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
3158
{
L
Luiz Capitulino 已提交
3159
	int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3160

L
Luiz Capitulino 已提交
3161
	if (!pkt_dev->running) {
J
Joe Perches 已提交
3162 3163
		pr_warning("interface: %s is already stopped\n",
			   pkt_dev->odevname);
L
Luiz Capitulino 已提交
3164 3165
		return -EINVAL;
	}
L
Linus Torvalds 已提交
3166

S
Stephen Hemminger 已提交
3167 3168
	kfree_skb(pkt_dev->skb);
	pkt_dev->skb = NULL;
D
Daniel Borkmann 已提交
3169
	pkt_dev->stopped_at = ktime_get();
L
Luiz Capitulino 已提交
3170
	pkt_dev->running = 0;
L
Linus Torvalds 已提交
3171

3172
	show_results(pkt_dev, nr_frags);
L
Linus Torvalds 已提交
3173

L
Luiz Capitulino 已提交
3174
	return 0;
L
Linus Torvalds 已提交
3175 3176
}

L
Luiz Capitulino 已提交
3177
static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
L
Linus Torvalds 已提交
3178
{
3179
	struct pktgen_dev *pkt_dev, *best = NULL;
L
Luiz Capitulino 已提交
3180

L
Linus Torvalds 已提交
3181 3182
	if_lock(t);

3183 3184
	list_for_each_entry(pkt_dev, &t->if_list, list) {
		if (!pkt_dev->running)
L
Luiz Capitulino 已提交
3185 3186
			continue;
		if (best == NULL)
3187
			best = pkt_dev;
D
Daniel Borkmann 已提交
3188
		else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3189
			best = pkt_dev;
L
Linus Torvalds 已提交
3190 3191
	}
	if_unlock(t);
L
Luiz Capitulino 已提交
3192
	return best;
L
Linus Torvalds 已提交
3193 3194
}

L
Luiz Capitulino 已提交
3195 3196
static void pktgen_stop(struct pktgen_thread *t)
{
3197
	struct pktgen_dev *pkt_dev;
L
Linus Torvalds 已提交
3198

J
Joe Perches 已提交
3199
	func_enter();
L
Linus Torvalds 已提交
3200

L
Luiz Capitulino 已提交
3201
	if_lock(t);
L
Linus Torvalds 已提交
3202

3203 3204
	list_for_each_entry(pkt_dev, &t->if_list, list) {
		pktgen_stop_device(pkt_dev);
3205
	}
L
Linus Torvalds 已提交
3206

L
Luiz Capitulino 已提交
3207
	if_unlock(t);
L
Linus Torvalds 已提交
3208 3209
}

3210 3211 3212 3213 3214 3215
/*
 * one of our devices needs to be removed - find it
 * and remove it
 */
static void pktgen_rem_one_if(struct pktgen_thread *t)
{
3216 3217
	struct list_head *q, *n;
	struct pktgen_dev *cur;
3218

J
Joe Perches 已提交
3219
	func_enter();
3220 3221 3222

	if_lock(t);

3223 3224
	list_for_each_safe(q, n, &t->if_list) {
		cur = list_entry(q, struct pktgen_dev, list);
3225

L
Luiz Capitulino 已提交
3226 3227
		if (!cur->removal_mark)
			continue;
3228

3229
		kfree_skb(cur->skb);
3230 3231 3232 3233 3234 3235 3236 3237 3238 3239
		cur->skb = NULL;

		pktgen_remove_device(t, cur);

		break;
	}

	if_unlock(t);
}

L
Luiz Capitulino 已提交
3240
static void pktgen_rem_all_ifs(struct pktgen_thread *t)
L
Linus Torvalds 已提交
3241
{
3242 3243
	struct list_head *q, *n;
	struct pktgen_dev *cur;
L
Luiz Capitulino 已提交
3244

J
Joe Perches 已提交
3245 3246
	func_enter();

L
Luiz Capitulino 已提交
3247
	/* Remove all devices, free mem */
3248

L
Luiz Capitulino 已提交
3249
	if_lock(t);
L
Linus Torvalds 已提交
3250

3251 3252
	list_for_each_safe(q, n, &t->if_list) {
		cur = list_entry(q, struct pktgen_dev, list);
3253

3254
		kfree_skb(cur->skb);
3255 3256
		cur->skb = NULL;

L
Linus Torvalds 已提交
3257 3258 3259
		pktgen_remove_device(t, cur);
	}

L
Luiz Capitulino 已提交
3260
	if_unlock(t);
L
Linus Torvalds 已提交
3261 3262
}

L
Luiz Capitulino 已提交
3263
static void pktgen_rem_thread(struct pktgen_thread *t)
L
Linus Torvalds 已提交
3264
{
L
Luiz Capitulino 已提交
3265
	/* Remove from the thread list */
C
Cong Wang 已提交
3266
	remove_proc_entry(t->tsk->comm, t->net->proc_dir);
L
Linus Torvalds 已提交
3267 3268
}

3269
static void pktgen_resched(struct pktgen_dev *pkt_dev)
3270
{
D
Daniel Borkmann 已提交
3271
	ktime_t idle_start = ktime_get();
3272
	schedule();
D
Daniel Borkmann 已提交
3273
	pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3274
}
3275

3276 3277
static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
{
D
Daniel Borkmann 已提交
3278
	ktime_t idle_start = ktime_get();
3279

3280 3281 3282 3283 3284 3285 3286 3287 3288
	while (atomic_read(&(pkt_dev->skb->users)) != 1) {
		if (signal_pending(current))
			break;

		if (need_resched())
			pktgen_resched(pkt_dev);
		else
			cpu_relax();
	}
D
Daniel Borkmann 已提交
3289
	pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3290 3291
}

S
Stephen Hemminger 已提交
3292
static void pktgen_xmit(struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
3293
{
3294
	struct net_device *odev = pkt_dev->odev;
3295
	netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3296
		= odev->netdev_ops->ndo_start_xmit;
3297 3298
	struct netdev_queue *txq;
	u16 queue_map;
L
Linus Torvalds 已提交
3299 3300
	int ret;

3301 3302 3303 3304
	/* If device is offline, then don't send */
	if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
		pktgen_stop_device(pkt_dev);
		return;
3305 3306
	}

3307 3308 3309 3310
	/* This is max DELAY, this has special meaning of
	 * "never transmit"
	 */
	if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
D
Daniel Borkmann 已提交
3311
		pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3312
		return;
L
Linus Torvalds 已提交
3313
	}
L
Luiz Capitulino 已提交
3314

3315
	/* If no skb or clone count exhausted then get new one */
3316 3317 3318 3319 3320 3321 3322
	if (!pkt_dev->skb || (pkt_dev->last_ok &&
			      ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
		/* build a new pkt */
		kfree_skb(pkt_dev->skb);

		pkt_dev->skb = fill_packet(odev, pkt_dev);
		if (pkt_dev->skb == NULL) {
J
Joe Perches 已提交
3323
			pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3324 3325 3326
			schedule();
			pkt_dev->clone_count--;	/* back out increment, OOM */
			return;
L
Linus Torvalds 已提交
3327
		}
3328
		pkt_dev->last_pkt_size = pkt_dev->skb->len;
3329 3330
		pkt_dev->allocated_skbs++;
		pkt_dev->clone_count = 0;	/* reset counter */
L
Linus Torvalds 已提交
3331
	}
3332

3333 3334 3335
	if (pkt_dev->delay && pkt_dev->last_ok)
		spin(pkt_dev, pkt_dev->next_tx);

3336 3337 3338 3339
	queue_map = skb_get_queue_mapping(pkt_dev->skb);
	txq = netdev_get_tx_queue(odev, queue_map);

	__netif_tx_lock_bh(txq);
3340

3341
	if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3342
		ret = NETDEV_TX_BUSY;
3343 3344 3345 3346 3347
		pkt_dev->last_ok = 0;
		goto unlock;
	}
	atomic_inc(&(pkt_dev->skb->users));
	ret = (*xmit)(pkt_dev->skb, odev);
3348 3349 3350 3351 3352 3353 3354

	switch (ret) {
	case NETDEV_TX_OK:
		txq_trans_update(txq);
		pkt_dev->last_ok = 1;
		pkt_dev->sofar++;
		pkt_dev->seq_num++;
3355
		pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3356
		break;
3357 3358 3359 3360 3361 3362
	case NET_XMIT_DROP:
	case NET_XMIT_CN:
	case NET_XMIT_POLICED:
		/* skb has been consumed */
		pkt_dev->errors++;
		break;
3363
	default: /* Drivers are not supposed to return other values! */
3364 3365
		net_info_ratelimited("%s xmit error: %d\n",
				     pkt_dev->odevname, ret);
3366 3367 3368 3369 3370 3371 3372
		pkt_dev->errors++;
		/* fallthru */
	case NETDEV_TX_LOCKED:
	case NETDEV_TX_BUSY:
		/* Retry it next time */
		atomic_dec(&(pkt_dev->skb->users));
		pkt_dev->last_ok = 0;
L
Luiz Capitulino 已提交
3373
	}
3374
unlock:
3375
	__netif_tx_unlock_bh(txq);
L
Luiz Capitulino 已提交
3376

L
Linus Torvalds 已提交
3377 3378
	/* If pkt_dev->count is zero, then run forever */
	if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3379
		pktgen_wait_for_skb(pkt_dev);
L
Luiz Capitulino 已提交
3380

L
Linus Torvalds 已提交
3381 3382
		/* Done with this */
		pktgen_stop_device(pkt_dev);
L
Luiz Capitulino 已提交
3383 3384
	}
}
L
Linus Torvalds 已提交
3385

3386
/*
L
Linus Torvalds 已提交
3387 3388 3389
 * Main loop of the thread goes here
 */

3390
static int pktgen_thread_worker(void *arg)
L
Linus Torvalds 已提交
3391 3392
{
	DEFINE_WAIT(wait);
3393
	struct pktgen_thread *t = arg;
L
Luiz Capitulino 已提交
3394
	struct pktgen_dev *pkt_dev = NULL;
L
Linus Torvalds 已提交
3395 3396
	int cpu = t->cpu;

3397
	BUG_ON(smp_processor_id() != cpu);
L
Linus Torvalds 已提交
3398 3399

	init_waitqueue_head(&t->queue);
3400
	complete(&t->start_done);
L
Linus Torvalds 已提交
3401

J
Joe Perches 已提交
3402
	pr_debug("starting pktgen/%d:  pid=%d\n", cpu, task_pid_nr(current));
L
Linus Torvalds 已提交
3403

3404
	set_current_state(TASK_INTERRUPTIBLE);
L
Luiz Capitulino 已提交
3405

3406 3407
	set_freezable();

3408 3409
	while (!kthread_should_stop()) {
		pkt_dev = next_to_run(t);
L
Linus Torvalds 已提交
3410

3411
		if (unlikely(!pkt_dev && t->control == 0)) {
C
Cong Wang 已提交
3412
			if (t->net->pktgen_exiting)
E
Eric Dumazet 已提交
3413
				break;
3414 3415 3416
			wait_event_interruptible_timeout(t->queue,
							 t->control != 0,
							 HZ/10);
R
Rafael J. Wysocki 已提交
3417
			try_to_freeze();
3418
			continue;
3419
		}
L
Linus Torvalds 已提交
3420

3421
		__set_current_state(TASK_RUNNING);
L
Luiz Capitulino 已提交
3422

3423
		if (likely(pkt_dev)) {
L
Linus Torvalds 已提交
3424 3425
			pktgen_xmit(pkt_dev);

3426 3427 3428 3429 3430 3431
			if (need_resched())
				pktgen_resched(pkt_dev);
			else
				cpu_relax();
		}

L
Luiz Capitulino 已提交
3432
		if (t->control & T_STOP) {
L
Linus Torvalds 已提交
3433 3434 3435 3436
			pktgen_stop(t);
			t->control &= ~(T_STOP);
		}

L
Luiz Capitulino 已提交
3437
		if (t->control & T_RUN) {
L
Linus Torvalds 已提交
3438 3439 3440 3441
			pktgen_run(t);
			t->control &= ~(T_RUN);
		}

L
Luiz Capitulino 已提交
3442
		if (t->control & T_REMDEVALL) {
L
Linus Torvalds 已提交
3443
			pktgen_rem_all_ifs(t);
3444 3445 3446
			t->control &= ~(T_REMDEVALL);
		}

L
Luiz Capitulino 已提交
3447
		if (t->control & T_REMDEV) {
3448
			pktgen_rem_one_if(t);
L
Linus Torvalds 已提交
3449 3450 3451
			t->control &= ~(T_REMDEV);
		}

A
Andrew Morton 已提交
3452 3453
		try_to_freeze();

3454
		set_current_state(TASK_INTERRUPTIBLE);
L
Luiz Capitulino 已提交
3455
	}
L
Linus Torvalds 已提交
3456

J
Joe Perches 已提交
3457
	pr_debug("%s stopping all device\n", t->tsk->comm);
L
Luiz Capitulino 已提交
3458
	pktgen_stop(t);
L
Linus Torvalds 已提交
3459

J
Joe Perches 已提交
3460
	pr_debug("%s removing all device\n", t->tsk->comm);
L
Luiz Capitulino 已提交
3461
	pktgen_rem_all_ifs(t);
L
Linus Torvalds 已提交
3462

J
Joe Perches 已提交
3463
	pr_debug("%s removing thread\n", t->tsk->comm);
L
Luiz Capitulino 已提交
3464
	pktgen_rem_thread(t);
3465

E
Eric Dumazet 已提交
3466 3467 3468 3469 3470 3471 3472
	/* Wait for kthread_stop */
	while (!kthread_should_stop()) {
		set_current_state(TASK_INTERRUPTIBLE);
		schedule();
	}
	__set_current_state(TASK_RUNNING);

3473
	return 0;
L
Linus Torvalds 已提交
3474 3475
}

L
Luiz Capitulino 已提交
3476
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
E
Eric Dumazet 已提交
3477
					  const char *ifname, bool exact)
L
Linus Torvalds 已提交
3478
{
3479
	struct pktgen_dev *p, *pkt_dev = NULL;
E
Eric Dumazet 已提交
3480
	size_t len = strlen(ifname);
L
Luiz Capitulino 已提交
3481

E
Eric Dumazet 已提交
3482
	if_lock(t);
3483
	list_for_each_entry(p, &t->if_list, list)
E
Eric Dumazet 已提交
3484 3485 3486 3487 3488
		if (strncmp(p->odevname, ifname, len) == 0) {
			if (p->odevname[len]) {
				if (exact || p->odevname[len] != '@')
					continue;
			}
3489
			pkt_dev = p;
L
Luiz Capitulino 已提交
3490 3491 3492 3493
			break;
		}

	if_unlock(t);
J
Joe Perches 已提交
3494
	pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
L
Luiz Capitulino 已提交
3495
	return pkt_dev;
L
Linus Torvalds 已提交
3496 3497
}

3498 3499
/*
 * Adds a dev at front of if_list.
L
Linus Torvalds 已提交
3500 3501
 */

L
Luiz Capitulino 已提交
3502 3503
static int add_dev_to_thread(struct pktgen_thread *t,
			     struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
3504 3505
{
	int rv = 0;
L
Luiz Capitulino 已提交
3506 3507 3508 3509

	if_lock(t);

	if (pkt_dev->pg_thread) {
J
Joe Perches 已提交
3510
		pr_err("ERROR: already assigned to a thread\n");
L
Luiz Capitulino 已提交
3511 3512 3513
		rv = -EBUSY;
		goto out;
	}
3514 3515

	list_add(&pkt_dev->list, &t->if_list);
L
Luiz Capitulino 已提交
3516
	pkt_dev->pg_thread = t;
L
Linus Torvalds 已提交
3517 3518
	pkt_dev->running = 0;

L
Luiz Capitulino 已提交
3519 3520 3521
out:
	if_unlock(t);
	return rv;
L
Linus Torvalds 已提交
3522 3523 3524 3525
}

/* Called under thread lock */

L
Luiz Capitulino 已提交
3526
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
L
Linus Torvalds 已提交
3527
{
L
Luiz Capitulino 已提交
3528
	struct pktgen_dev *pkt_dev;
3529
	int err;
E
Eric Dumazet 已提交
3530
	int node = cpu_to_node(t->cpu);
L
Luiz Capitulino 已提交
3531

L
Linus Torvalds 已提交
3532 3533
	/* We don't allow a device to be on several threads */

C
Cong Wang 已提交
3534
	pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3535
	if (pkt_dev) {
J
Joe Perches 已提交
3536
		pr_err("ERROR: interface already used\n");
L
Luiz Capitulino 已提交
3537 3538
		return -EBUSY;
	}
3539

E
Eric Dumazet 已提交
3540
	pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3541 3542 3543
	if (!pkt_dev)
		return -ENOMEM;

E
Eric Dumazet 已提交
3544
	strcpy(pkt_dev->odevname, ifname);
3545
	pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
E
Eric Dumazet 已提交
3546
				      node);
3547 3548 3549 3550 3551
	if (pkt_dev->flows == NULL) {
		kfree(pkt_dev);
		return -ENOMEM;
	}

3552
	pkt_dev->removal_mark = 0;
3553
	pkt_dev->nfrags = 0;
3554
	pkt_dev->delay = pg_delay_d;
3555 3556
	pkt_dev->count = pg_count_d;
	pkt_dev->sofar = 0;
L
Luiz Capitulino 已提交
3557
	pkt_dev->udp_src_min = 9;	/* sink port */
3558 3559 3560
	pkt_dev->udp_src_max = 9;
	pkt_dev->udp_dst_min = 9;
	pkt_dev->udp_dst_max = 9;
F
Francesco Fondelli 已提交
3561 3562 3563 3564 3565 3566
	pkt_dev->vlan_p = 0;
	pkt_dev->vlan_cfi = 0;
	pkt_dev->vlan_id = 0xffff;
	pkt_dev->svlan_p = 0;
	pkt_dev->svlan_cfi = 0;
	pkt_dev->svlan_id = 0xffff;
R
Robert Olsson 已提交
3567
	pkt_dev->node = -1;
F
Francesco Fondelli 已提交
3568

C
Cong Wang 已提交
3569
	err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3570 3571
	if (err)
		goto out1;
3572 3573
	if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
		pkt_dev->clone_skb = pg_clone_skb_d;
3574

C
Cong Wang 已提交
3575
	pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3576
					  &pktgen_if_fops, pkt_dev);
3577
	if (!pkt_dev->entry) {
J
Joe Perches 已提交
3578
		pr_err("cannot create %s/%s procfs entry\n",
3579
		       PG_PROC_DIR, ifname);
3580 3581
		err = -EINVAL;
		goto out2;
3582
	}
J
Jamal Hadi Salim 已提交
3583 3584 3585
#ifdef CONFIG_XFRM
	pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
	pkt_dev->ipsproto = IPPROTO_ESP;
3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596

	/* xfrm tunnel mode needs additional dst to extract outter
	 * ip header protocol/ttl/id field, here creat a phony one.
	 * instead of looking for a valid rt, which definitely hurting
	 * performance under such circumstance.
	 */
	pkt_dev->dstops.family = AF_INET;
	pkt_dev->dst.dev = pkt_dev->odev;
	dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
	pkt_dev->dst.child = &pkt_dev->dst;
	pkt_dev->dst.ops = &pkt_dev->dstops;
J
Jamal Hadi Salim 已提交
3597
#endif
3598 3599

	return add_dev_to_thread(t, pkt_dev);
3600 3601 3602
out2:
	dev_put(pkt_dev->odev);
out1:
J
Jamal Hadi Salim 已提交
3603 3604 3605
#ifdef CONFIG_XFRM
	free_SAs(pkt_dev);
#endif
F
Figo.zhang 已提交
3606
	vfree(pkt_dev->flows);
3607 3608
	kfree(pkt_dev);
	return err;
L
Linus Torvalds 已提交
3609 3610
}

C
Cong Wang 已提交
3611
static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
L
Linus Torvalds 已提交
3612
{
3613
	struct pktgen_thread *t;
3614
	struct proc_dir_entry *pe;
3615
	struct task_struct *p;
L
Luiz Capitulino 已提交
3616

E
Eric Dumazet 已提交
3617 3618
	t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
			 cpu_to_node(cpu));
L
Luiz Capitulino 已提交
3619
	if (!t) {
J
Joe Perches 已提交
3620
		pr_err("ERROR: out of memory, can't create new thread\n");
L
Luiz Capitulino 已提交
3621 3622 3623 3624
		return -ENOMEM;
	}

	spin_lock_init(&t->if_lock);
L
Linus Torvalds 已提交
3625
	t->cpu = cpu;
L
Luiz Capitulino 已提交
3626

3627 3628
	INIT_LIST_HEAD(&t->if_list);

C
Cong Wang 已提交
3629
	list_add_tail(&t->th_list, &pn->pktgen_threads);
3630
	init_completion(&t->start_done);
3631

3632 3633 3634 3635
	p = kthread_create_on_node(pktgen_thread_worker,
				   t,
				   cpu_to_node(cpu),
				   "kpktgend_%d", cpu);
3636
	if (IS_ERR(p)) {
J
Joe Perches 已提交
3637
		pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3638 3639 3640 3641 3642 3643 3644
		list_del(&t->th_list);
		kfree(t);
		return PTR_ERR(p);
	}
	kthread_bind(p, cpu);
	t->tsk = p;

C
Cong Wang 已提交
3645
	pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3646
			      &pktgen_thread_fops, t);
L
Luiz Capitulino 已提交
3647
	if (!pe) {
J
Joe Perches 已提交
3648
		pr_err("cannot create %s/%s procfs entry\n",
3649 3650 3651
		       PG_PROC_DIR, t->tsk->comm);
		kthread_stop(p);
		list_del(&t->th_list);
L
Luiz Capitulino 已提交
3652 3653 3654
		kfree(t);
		return -EINVAL;
	}
3655

C
Cong Wang 已提交
3656
	t->net = pn;
3657
	wake_up_process(p);
3658
	wait_for_completion(&t->start_done);
L
Linus Torvalds 已提交
3659 3660 3661 3662

	return 0;
}

3663 3664
/*
 * Removes a device from the thread if_list.
L
Linus Torvalds 已提交
3665
 */
L
Luiz Capitulino 已提交
3666 3667
static void _rem_dev_from_if_list(struct pktgen_thread *t,
				  struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
3668
{
3669 3670
	struct list_head *q, *n;
	struct pktgen_dev *p;
L
Linus Torvalds 已提交
3671

3672 3673 3674 3675
	list_for_each_safe(q, n, &t->if_list) {
		p = list_entry(q, struct pktgen_dev, list);
		if (p == pkt_dev)
			list_del(&p->list);
L
Linus Torvalds 已提交
3676 3677 3678
	}
}

L
Luiz Capitulino 已提交
3679 3680
static int pktgen_remove_device(struct pktgen_thread *t,
				struct pktgen_dev *pkt_dev)
L
Linus Torvalds 已提交
3681
{
J
Joe Perches 已提交
3682
	pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
L
Linus Torvalds 已提交
3683

L
Luiz Capitulino 已提交
3684
	if (pkt_dev->running) {
J
Joe Perches 已提交
3685
		pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
L
Luiz Capitulino 已提交
3686 3687 3688 3689
		pktgen_stop_device(pkt_dev);
	}

	/* Dis-associate from the interface */
L
Linus Torvalds 已提交
3690 3691 3692

	if (pkt_dev->odev) {
		dev_put(pkt_dev->odev);
L
Luiz Capitulino 已提交
3693 3694 3695
		pkt_dev->odev = NULL;
	}

L
Linus Torvalds 已提交
3696 3697 3698 3699
	/* And update the thread if_list */

	_rem_dev_from_if_list(t, pkt_dev);

3700
	if (pkt_dev->entry)
3701
		proc_remove(pkt_dev->entry);
L
Linus Torvalds 已提交
3702

J
Jamal Hadi Salim 已提交
3703 3704 3705
#ifdef CONFIG_XFRM
	free_SAs(pkt_dev);
#endif
F
Figo.zhang 已提交
3706
	vfree(pkt_dev->flows);
E
Eric Dumazet 已提交
3707 3708
	if (pkt_dev->page)
		put_page(pkt_dev->page);
L
Linus Torvalds 已提交
3709
	kfree(pkt_dev);
L
Luiz Capitulino 已提交
3710
	return 0;
L
Linus Torvalds 已提交
3711 3712
}

C
Cong Wang 已提交
3713
static int __net_init pg_net_init(struct net *net)
L
Linus Torvalds 已提交
3714
{
C
Cong Wang 已提交
3715
	struct pktgen_net *pn = net_generic(net, pg_net_id);
3716
	struct proc_dir_entry *pe;
C
Cong Wang 已提交
3717 3718 3719 3720 3721 3722 3723 3724
	int cpu, ret = 0;

	pn->net = net;
	INIT_LIST_HEAD(&pn->pktgen_threads);
	pn->pktgen_exiting = false;
	pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
	if (!pn->proc_dir) {
		pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3725
		return -ENODEV;
C
Cong Wang 已提交
3726 3727
	}
	pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
L
Luiz Capitulino 已提交
3728
	if (pe == NULL) {
C
Cong Wang 已提交
3729
		pr_err("cannot create %s procfs entry\n", PGCTRL);
W
WANG Cong 已提交
3730
		ret = -EINVAL;
C
Cong Wang 已提交
3731
		goto remove;
L
Luiz Capitulino 已提交
3732
	}
L
Linus Torvalds 已提交
3733

J
John Hawkes 已提交
3734
	for_each_online_cpu(cpu) {
3735
		int err;
L
Linus Torvalds 已提交
3736

C
Cong Wang 已提交
3737
		err = pktgen_create_thread(cpu, pn);
3738
		if (err)
C
Cong Wang 已提交
3739
			pr_warn("Cannot create thread for cpu %d (%d)\n",
J
Joe Perches 已提交
3740
				   cpu, err);
L
Luiz Capitulino 已提交
3741
	}
3742

C
Cong Wang 已提交
3743 3744
	if (list_empty(&pn->pktgen_threads)) {
		pr_err("Initialization failed for all threads\n");
W
WANG Cong 已提交
3745
		ret = -ENODEV;
C
Cong Wang 已提交
3746
		goto remove_entry;
3747 3748
	}

L
Luiz Capitulino 已提交
3749
	return 0;
W
WANG Cong 已提交
3750

C
Cong Wang 已提交
3751 3752 3753
remove_entry:
	remove_proc_entry(PGCTRL, pn->proc_dir);
remove:
3754
	remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
W
WANG Cong 已提交
3755
	return ret;
L
Linus Torvalds 已提交
3756 3757
}

C
Cong Wang 已提交
3758
static void __net_exit pg_net_exit(struct net *net)
L
Linus Torvalds 已提交
3759
{
C
Cong Wang 已提交
3760
	struct pktgen_net *pn = net_generic(net, pg_net_id);
3761 3762
	struct pktgen_thread *t;
	struct list_head *q, *n;
3763
	LIST_HEAD(list);
L
Linus Torvalds 已提交
3764

L
Luiz Capitulino 已提交
3765
	/* Stop all interfaces & threads */
C
Cong Wang 已提交
3766
	pn->pktgen_exiting = true;
L
Linus Torvalds 已提交
3767

3768
	mutex_lock(&pktgen_thread_lock);
C
Cong Wang 已提交
3769
	list_splice_init(&pn->pktgen_threads, &list);
3770 3771 3772
	mutex_unlock(&pktgen_thread_lock);

	list_for_each_safe(q, n, &list) {
3773
		t = list_entry(q, struct pktgen_thread, th_list);
3774
		list_del(&t->th_list);
3775 3776
		kthread_stop(t->tsk);
		kfree(t);
L
Luiz Capitulino 已提交
3777
	}
L
Linus Torvalds 已提交
3778

C
Cong Wang 已提交
3779
	remove_proc_entry(PGCTRL, pn->proc_dir);
3780
	remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
C
Cong Wang 已提交
3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792
}

static struct pernet_operations pg_net_ops = {
	.init = pg_net_init,
	.exit = pg_net_exit,
	.id   = &pg_net_id,
	.size = sizeof(struct pktgen_net),
};

static int __init pg_init(void)
{
	int ret = 0;
L
Linus Torvalds 已提交
3793

C
Cong Wang 已提交
3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808
	pr_info("%s", version);
	ret = register_pernet_subsys(&pg_net_ops);
	if (ret)
		return ret;
	ret = register_netdevice_notifier(&pktgen_notifier_block);
	if (ret)
		unregister_pernet_subsys(&pg_net_ops);

	return ret;
}

static void __exit pg_cleanup(void)
{
	unregister_netdevice_notifier(&pktgen_notifier_block);
	unregister_pernet_subsys(&pg_net_ops);
L
Linus Torvalds 已提交
3809 3810 3811 3812 3813
}

module_init(pg_init);
module_exit(pg_cleanup);

S
Stephen Hemminger 已提交
3814
MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
L
Linus Torvalds 已提交
3815 3816
MODULE_DESCRIPTION("Packet Generator tool");
MODULE_LICENSE("GPL");
S
Stephen Hemminger 已提交
3817
MODULE_VERSION(VERSION);
L
Linus Torvalds 已提交
3818
module_param(pg_count_d, int, 0);
S
Stephen Hemminger 已提交
3819
MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
L
Linus Torvalds 已提交
3820
module_param(pg_delay_d, int, 0);
S
Stephen Hemminger 已提交
3821
MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
L
Linus Torvalds 已提交
3822
module_param(pg_clone_skb_d, int, 0);
S
Stephen Hemminger 已提交
3823
MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
L
Linus Torvalds 已提交
3824
module_param(debug, int, 0);
S
Stephen Hemminger 已提交
3825
MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");