3893 строки
95 KiB
C
3893 строки
95 KiB
C
/*
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* Authors:
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* Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
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* Uppsala University and
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* Swedish University of Agricultural Sciences
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*
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* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
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* Ben Greear <greearb@candelatech.com>
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* Jens Låås <jens.laas@data.slu.se>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*
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* 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
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* to use multiple SKBs or just the same one.
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* pktgen uses the installed interface's output routine.
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*
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* Additional hacking by:
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*
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* Jens.Laas@data.slu.se
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* Improved by ANK. 010120.
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* Improved by ANK even more. 010212.
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* MAC address typo fixed. 010417 --ro
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* Integrated. 020301 --DaveM
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* Added multiskb option 020301 --DaveM
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* Scaling of results. 020417--sigurdur@linpro.no
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* Significant re-work of the module:
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* * Convert to threaded model to more efficiently be able to transmit
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* and receive on multiple interfaces at once.
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* * Converted many counters to __u64 to allow longer runs.
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* * Allow configuration of ranges, like min/max IP address, MACs,
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* and UDP-ports, for both source and destination, and can
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* set to use a random distribution or sequentially walk the range.
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* * Can now change most values after starting.
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* * Place 12-byte packet in UDP payload with magic number,
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* sequence number, and timestamp.
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* * Add receiver code that detects dropped pkts, re-ordered pkts, and
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* latencies (with micro-second) precision.
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* * Add IOCTL interface to easily get counters & configuration.
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* --Ben Greear <greearb@candelatech.com>
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*
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* Renamed multiskb to clone_skb and cleaned up sending core for two distinct
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* 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
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* stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
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* clones.
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*
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* Also moved to /proc/net/pktgen/
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* --ro
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*
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* Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
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* mistakes. Also merged in DaveM's patch in the -pre6 patch.
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* --Ben Greear <greearb@candelatech.com>
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*
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* Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
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*
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*
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* 021124 Finished major redesign and rewrite for new functionality.
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* See Documentation/networking/pktgen.txt for how to use this.
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*
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* The new operation:
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* For each CPU one thread/process is created at start. This process checks
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* for running devices in the if_list and sends packets until count is 0 it
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* also the thread checks the thread->control which is used for inter-process
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* communication. controlling process "posts" operations to the threads this
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* way.
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* The if_list is RCU protected, and the if_lock remains to protect updating
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* of if_list, from "add_device" as it invoked from userspace (via proc write).
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*
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* By design there should only be *one* "controlling" process. In practice
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* 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
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* /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
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* --ro
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*
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* Fix refcount off by one if first packet fails, potential null deref,
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* memleak 030710- KJP
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*
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* First "ranges" functionality for ipv6 030726 --ro
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*
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* Included flow support. 030802 ANK.
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*
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* 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
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* ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
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*
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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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*
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* Randy Dunlap fixed u64 printk compiler warning
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*
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* Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
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* New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
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*
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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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*
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* interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
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* 050103
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*
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* MPLS support by Steven Whitehouse <steve@chygwyn.com>
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*
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* 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
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*
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* Fixed src_mac command to set source mac of packet to value specified in
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* command by Adit Ranadive <adit.262@gmail.com>
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/sys.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/unistd.h>
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#include <linux/string.h>
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#include <linux/ptrace.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#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>
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#include <linux/timer.h>
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#include <linux/list.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/inet.h>
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#include <linux/inetdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/if_arp.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/udp.h>
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#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>
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#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
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#include <net/xfrm.h>
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#endif
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#include <net/netns/generic.h>
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#include <asm/byteorder.h>
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#include <linux/rcupdate.h>
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#include <linux/bitops.h>
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#include <linux/io.h>
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#include <linux/timex.h>
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#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 "2.75"
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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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#define PKT_FLAGS \
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pf(IPV6) /* Interface in IPV6 Mode */ \
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pf(IPSRC_RND) /* IP-Src Random */ \
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pf(IPDST_RND) /* IP-Dst Random */ \
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pf(TXSIZE_RND) /* Transmit size is random */ \
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pf(UDPSRC_RND) /* UDP-Src Random */ \
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pf(UDPDST_RND) /* UDP-Dst Random */ \
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pf(UDPCSUM) /* Include UDP checksum */ \
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pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \
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pf(MPLS_RND) /* Random MPLS labels */ \
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pf(QUEUE_MAP_RND) /* queue map Random */ \
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pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \
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pf(FLOW_SEQ) /* Sequential flows */ \
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pf(IPSEC) /* ipsec on for flows */ \
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pf(MACSRC_RND) /* MAC-Src Random */ \
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pf(MACDST_RND) /* MAC-Dst Random */ \
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pf(VID_RND) /* Random VLAN ID */ \
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pf(SVID_RND) /* Random SVLAN ID */ \
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pf(NODE) /* Node memory alloc*/ \
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#define pf(flag) flag##_SHIFT,
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enum pkt_flags {
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PKT_FLAGS
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};
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#undef pf
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/* Device flag bits */
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#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
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PKT_FLAGS
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#undef pf
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#define pf(flag) __stringify(flag),
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static char *pkt_flag_names[] = {
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PKT_FLAGS
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};
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#undef pf
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#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
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/* Thread control flag bits */
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#define T_STOP (1<<0) /* Stop run */
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#define T_RUN (1<<1) /* Start run */
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#define T_REMDEVALL (1<<2) /* Remove all devs */
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#define T_REMDEV (1<<3) /* Remove one dev */
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/* Xmit modes */
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#define M_START_XMIT 0 /* Default normal TX */
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#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
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#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
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/* If lock -- protects updating of if_list */
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#define if_lock(t) mutex_lock(&(t->if_lock));
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#define if_unlock(t) mutex_unlock(&(t->if_lock));
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/* Used to help with determining the pkts on receive */
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#define PKTGEN_MAGIC 0xbe9be955
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#define PG_PROC_DIR "pktgen"
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#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)
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#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
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struct xfrm_state *x;
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#endif
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__u32 flags;
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};
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/* flow flag bits */
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#define F_INIT (1<<0) /* flow has been initialized */
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struct pktgen_dev {
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/*
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* Try to keep frequent/infrequent used vars. separated.
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*/
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struct proc_dir_entry *entry; /* proc file */
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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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struct rcu_head rcu; /* freed by RCU */
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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
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* we will do a random selection from within the range.
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*/
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__u32 flags;
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int xmit_mode;
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int min_pkt_size;
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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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int removal_mark; /* non-zero => the device is marked for
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* removal by worker thread */
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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 */
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__u64 sofar; /* How many pkts we've sent so far */
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__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 */
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__u32 clone_count;
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int last_ok; /* Was last skb sent?
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* Or a failed transmit of some sort?
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* This will keep sequence numbers in order
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*/
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ktime_t next_tx;
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ktime_t started_at;
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ktime_t stopped_at;
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u64 idle_acc; /* nano-seconds */
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__u32 seq_num;
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int clone_skb; /*
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* Use multiple SKBs during packet gen.
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* If this number is greater than 1, then
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* that many copies of the same packet will be
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* sent before a new packet is allocated.
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* If you want to send 1024 identical packets
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* before creating a new packet,
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* set clone_skb to 1024.
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*/
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char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
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char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
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char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
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char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
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struct in6_addr in6_saddr;
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struct in6_addr in6_daddr;
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struct in6_addr cur_in6_daddr;
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struct in6_addr cur_in6_saddr;
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/* For ranges */
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struct in6_addr min_in6_daddr;
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struct in6_addr max_in6_daddr;
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struct in6_addr min_in6_saddr;
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struct in6_addr max_in6_saddr;
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/* If we're doing ranges, random or incremental, then this
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* defines the min/max for those ranges.
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*/
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__be32 saddr_min; /* inclusive, source IP address */
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__be32 saddr_max; /* exclusive, source IP address */
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__be32 daddr_min; /* inclusive, dest IP address */
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__be32 daddr_max; /* exclusive, dest IP address */
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__u16 udp_src_min; /* inclusive, source UDP port */
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__u16 udp_src_max; /* exclusive, source UDP port */
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__u16 udp_dst_min; /* inclusive, dest UDP port */
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__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
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are for dscp codepoint */
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__u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
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(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) */
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__u8 vlan_p;
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__u8 vlan_cfi;
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__u16 vlan_id; /* 0xffff means no vlan tag */
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__u8 svlan_p;
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__u8 svlan_cfi;
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__u16 svlan_id; /* 0xffff means no svlan tag */
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__u32 src_mac_count; /* How many MACs to iterate through */
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__u32 dst_mac_count; /* How many MACs to iterate through */
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unsigned char dst_mac[ETH_ALEN];
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unsigned char src_mac[ETH_ALEN];
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__u32 cur_dst_mac_offset;
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__u32 cur_src_mac_offset;
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__be32 cur_saddr;
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__be32 cur_daddr;
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__u16 ip_id;
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__u16 cur_udp_dst;
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__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];
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/* = {
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0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
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We fill in SRC address later
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x08, 0x00
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};
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*/
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__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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*/
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struct net_device *odev; /* The out-going device.
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* Note that the device should have it's
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* pg_info pointer pointing back to this
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* device.
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* Set when the user specifies the out-going
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* device name (not when the inject is
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* started as it used to do.)
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*/
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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) */
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unsigned int lflow; /* Flow length (config) */
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unsigned int nflows; /* accumulated flows (stats) */
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unsigned int curfl; /* current sequenced flow (state)*/
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u16 queue_map_min;
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u16 queue_map_max;
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__u32 skb_priority; /* skb priority field */
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unsigned int burst; /* number of duplicated packets to burst */
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int node; /* Memory node */
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#ifdef CONFIG_XFRM
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__u8 ipsmode; /* IPSEC mode (config) */
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__u8 ipsproto; /* IPSEC type (config) */
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__u32 spi;
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struct xfrm_dst xdst;
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struct dst_ops dstops;
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#endif
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char result[512];
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};
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struct pktgen_hdr {
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__be32 pgh_magic;
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__be32 seq_num;
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__be32 tv_sec;
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__be32 tv_usec;
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};
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static unsigned int pg_net_id __read_mostly;
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struct pktgen_net {
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struct net *net;
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struct proc_dir_entry *proc_dir;
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struct list_head pktgen_threads;
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bool pktgen_exiting;
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};
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struct pktgen_thread {
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struct mutex 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,
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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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};
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#define REMOVE 1
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#define FIND 0
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static const char version[] =
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"Packet Generator for packet performance testing. "
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"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,
|
|
const char *ifname, bool exact);
|
|
static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
|
|
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);
|
|
|
|
static void pktgen_stop(struct pktgen_thread *t);
|
|
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
|
|
|
|
/* Module parameters, defaults. */
|
|
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;
|
|
|
|
static DEFINE_MUTEX(pktgen_thread_lock);
|
|
|
|
static struct notifier_block pktgen_notifier_block = {
|
|
.notifier_call = pktgen_device_event,
|
|
};
|
|
|
|
/*
|
|
* /proc handling functions
|
|
*
|
|
*/
|
|
|
|
static int pgctrl_show(struct seq_file *seq, void *v)
|
|
{
|
|
seq_puts(seq, version);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t pgctrl_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
char data[128];
|
|
struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (count == 0)
|
|
return -EINVAL;
|
|
|
|
if (count > sizeof(data))
|
|
count = sizeof(data);
|
|
|
|
if (copy_from_user(data, buf, count))
|
|
return -EFAULT;
|
|
|
|
data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
|
|
|
|
if (!strcmp(data, "stop"))
|
|
pktgen_stop_all_threads_ifs(pn);
|
|
|
|
else if (!strcmp(data, "start"))
|
|
pktgen_run_all_threads(pn);
|
|
|
|
else if (!strcmp(data, "reset"))
|
|
pktgen_reset_all_threads(pn);
|
|
|
|
else
|
|
return -EINVAL;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int pgctrl_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, pgctrl_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations pktgen_fops = {
|
|
.open = pgctrl_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.write = pgctrl_write,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int pktgen_if_show(struct seq_file *seq, void *v)
|
|
{
|
|
const struct pktgen_dev *pkt_dev = seq->private;
|
|
ktime_t stopped;
|
|
unsigned int i;
|
|
u64 idle;
|
|
|
|
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,
|
|
" frags: %d delay: %llu clone_skb: %d ifname: %s\n",
|
|
pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
|
|
pkt_dev->clone_skb, pkt_dev->odevname);
|
|
|
|
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
|
|
pkt_dev->lflow);
|
|
|
|
seq_printf(seq,
|
|
" queue_map_min: %u queue_map_max: %u\n",
|
|
pkt_dev->queue_map_min,
|
|
pkt_dev->queue_map_max);
|
|
|
|
if (pkt_dev->skb_priority)
|
|
seq_printf(seq, " skb_priority: %u\n",
|
|
pkt_dev->skb_priority);
|
|
|
|
if (pkt_dev->flags & F_IPV6) {
|
|
seq_printf(seq,
|
|
" 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);
|
|
} else {
|
|
seq_printf(seq,
|
|
" dst_min: %s dst_max: %s\n",
|
|
pkt_dev->dst_min, pkt_dev->dst_max);
|
|
seq_printf(seq,
|
|
" src_min: %s src_max: %s\n",
|
|
pkt_dev->src_min, pkt_dev->src_max);
|
|
}
|
|
|
|
seq_puts(seq, " src_mac: ");
|
|
|
|
seq_printf(seq, "%pM ",
|
|
is_zero_ether_addr(pkt_dev->src_mac) ?
|
|
pkt_dev->odev->dev_addr : pkt_dev->src_mac);
|
|
|
|
seq_puts(seq, "dst_mac: ");
|
|
seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
|
|
|
|
seq_printf(seq,
|
|
" udp_src_min: %d udp_src_max: %d"
|
|
" udp_dst_min: %d udp_dst_max: %d\n",
|
|
pkt_dev->udp_src_min, pkt_dev->udp_src_max,
|
|
pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
|
|
|
|
seq_printf(seq,
|
|
" src_mac_count: %d dst_mac_count: %d\n",
|
|
pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
|
|
|
|
if (pkt_dev->nr_labels) {
|
|
seq_puts(seq, " mpls: ");
|
|
for (i = 0; i < pkt_dev->nr_labels; i++)
|
|
seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
|
|
i == pkt_dev->nr_labels-1 ? "\n" : ", ");
|
|
}
|
|
|
|
if (pkt_dev->vlan_id != 0xffff)
|
|
seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
|
|
pkt_dev->vlan_id, pkt_dev->vlan_p,
|
|
pkt_dev->vlan_cfi);
|
|
|
|
if (pkt_dev->svlan_id != 0xffff)
|
|
seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
|
|
pkt_dev->svlan_id, pkt_dev->svlan_p,
|
|
pkt_dev->svlan_cfi);
|
|
|
|
if (pkt_dev->tos)
|
|
seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
|
|
|
|
if (pkt_dev->traffic_class)
|
|
seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
|
|
|
|
if (pkt_dev->burst > 1)
|
|
seq_printf(seq, " burst: %d\n", pkt_dev->burst);
|
|
|
|
if (pkt_dev->node >= 0)
|
|
seq_printf(seq, " node: %d\n", pkt_dev->node);
|
|
|
|
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
|
|
seq_puts(seq, " xmit_mode: netif_receive\n");
|
|
else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
|
|
seq_puts(seq, " xmit_mode: xmit_queue\n");
|
|
|
|
seq_puts(seq, " Flags: ");
|
|
|
|
for (i = 0; i < NR_PKT_FLAGS; i++) {
|
|
if (i == F_FLOW_SEQ)
|
|
if (!pkt_dev->cflows)
|
|
continue;
|
|
|
|
if (pkt_dev->flags & (1 << i))
|
|
seq_printf(seq, "%s ", pkt_flag_names[i]);
|
|
else if (i == F_FLOW_SEQ)
|
|
seq_puts(seq, "FLOW_RND ");
|
|
|
|
#ifdef CONFIG_XFRM
|
|
if (i == F_IPSEC && pkt_dev->spi)
|
|
seq_printf(seq, "spi:%u", pkt_dev->spi);
|
|
#endif
|
|
}
|
|
|
|
seq_puts(seq, "\n");
|
|
|
|
/* not really stopped, more like last-running-at */
|
|
stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
|
|
idle = pkt_dev->idle_acc;
|
|
do_div(idle, NSEC_PER_USEC);
|
|
|
|
seq_printf(seq,
|
|
"Current:\n pkts-sofar: %llu errors: %llu\n",
|
|
(unsigned long long)pkt_dev->sofar,
|
|
(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);
|
|
|
|
seq_printf(seq,
|
|
" seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
|
|
pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
|
|
pkt_dev->cur_src_mac_offset);
|
|
|
|
if (pkt_dev->flags & F_IPV6) {
|
|
seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
|
|
&pkt_dev->cur_in6_saddr,
|
|
&pkt_dev->cur_in6_daddr);
|
|
} else
|
|
seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
|
|
&pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
|
|
|
|
seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
|
|
pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
|
|
|
|
seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
|
|
|
|
seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
|
|
|
|
if (pkt_dev->result[0])
|
|
seq_printf(seq, "Result: %s\n", pkt_dev->result);
|
|
else
|
|
seq_puts(seq, "Result: Idle\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
|
|
__u32 *num)
|
|
{
|
|
int i = 0;
|
|
*num = 0;
|
|
|
|
for (; i < maxlen; i++) {
|
|
int value;
|
|
char c;
|
|
*num <<= 4;
|
|
if (get_user(c, &user_buffer[i]))
|
|
return -EFAULT;
|
|
value = hex_to_bin(c);
|
|
if (value >= 0)
|
|
*num |= value;
|
|
else
|
|
break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static int count_trail_chars(const char __user * user_buffer,
|
|
unsigned int maxlen)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < maxlen; i++) {
|
|
char c;
|
|
if (get_user(c, &user_buffer[i]))
|
|
return -EFAULT;
|
|
switch (c) {
|
|
case '\"':
|
|
case '\n':
|
|
case '\r':
|
|
case '\t':
|
|
case ' ':
|
|
case '=':
|
|
break;
|
|
default:
|
|
goto done;
|
|
}
|
|
}
|
|
done:
|
|
return i;
|
|
}
|
|
|
|
static long num_arg(const char __user *user_buffer, unsigned long maxlen,
|
|
unsigned long *num)
|
|
{
|
|
int i;
|
|
*num = 0;
|
|
|
|
for (i = 0; i < maxlen; i++) {
|
|
char c;
|
|
if (get_user(c, &user_buffer[i]))
|
|
return -EFAULT;
|
|
if ((c >= '0') && (c <= '9')) {
|
|
*num *= 10;
|
|
*num += c - '0';
|
|
} else
|
|
break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static int strn_len(const char __user * user_buffer, unsigned int maxlen)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < maxlen; i++) {
|
|
char c;
|
|
if (get_user(c, &user_buffer[i]))
|
|
return -EFAULT;
|
|
switch (c) {
|
|
case '\"':
|
|
case '\n':
|
|
case '\r':
|
|
case '\t':
|
|
case ' ':
|
|
goto done_str;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
done_str:
|
|
return i;
|
|
}
|
|
|
|
static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
|
|
{
|
|
unsigned int n = 0;
|
|
char c;
|
|
ssize_t i = 0;
|
|
int len;
|
|
|
|
pkt_dev->nr_labels = 0;
|
|
do {
|
|
__u32 tmp;
|
|
len = hex32_arg(&buffer[i], 8, &tmp);
|
|
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;
|
|
} while (c == ',');
|
|
|
|
pkt_dev->nr_labels = n;
|
|
return i;
|
|
}
|
|
|
|
static __u32 pktgen_read_flag(const char *f, bool *disable)
|
|
{
|
|
__u32 i;
|
|
|
|
if (f[0] == '!') {
|
|
*disable = true;
|
|
f++;
|
|
}
|
|
|
|
for (i = 0; i < NR_PKT_FLAGS; i++) {
|
|
if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
|
|
continue;
|
|
|
|
/* allow only disabling ipv6 flag */
|
|
if (!*disable && i == IPV6_SHIFT)
|
|
continue;
|
|
|
|
if (strcmp(f, pkt_flag_names[i]) == 0)
|
|
return 1 << i;
|
|
}
|
|
|
|
if (strcmp(f, "FLOW_RND") == 0) {
|
|
*disable = !*disable;
|
|
return F_FLOW_SEQ;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t pktgen_if_write(struct file *file,
|
|
const char __user * user_buffer, size_t count,
|
|
loff_t * offset)
|
|
{
|
|
struct seq_file *seq = file->private_data;
|
|
struct pktgen_dev *pkt_dev = seq->private;
|
|
int i, max, len;
|
|
char name[16], valstr[32];
|
|
unsigned long value = 0;
|
|
char *pg_result = NULL;
|
|
int tmp = 0;
|
|
char buf[128];
|
|
|
|
pg_result = &(pkt_dev->result[0]);
|
|
|
|
if (count < 1) {
|
|
pr_warn("wrong command format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
max = count;
|
|
tmp = count_trail_chars(user_buffer, max);
|
|
if (tmp < 0) {
|
|
pr_warn("illegal format\n");
|
|
return tmp;
|
|
}
|
|
i = tmp;
|
|
|
|
/* Read variable name */
|
|
|
|
len = strn_len(&user_buffer[i], sizeof(name) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
memset(name, 0, sizeof(name));
|
|
if (copy_from_user(name, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
i += len;
|
|
|
|
max = count - i;
|
|
len = count_trail_chars(&user_buffer[i], max);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
|
|
if (debug) {
|
|
size_t copy = min_t(size_t, count + 1, 1024);
|
|
char *tp = strndup_user(user_buffer, copy);
|
|
|
|
if (IS_ERR(tp))
|
|
return PTR_ERR(tp);
|
|
|
|
pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
|
|
kfree(tp);
|
|
}
|
|
|
|
if (!strcmp(name, "min_pkt_size")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
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);
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "max_pkt_size")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
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);
|
|
return count;
|
|
}
|
|
|
|
/* Shortcut for min = max */
|
|
|
|
if (!strcmp(name, "pkt_size")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
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;
|
|
}
|
|
sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "debug")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
debug = value;
|
|
sprintf(pg_result, "OK: debug=%u", debug);
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "frags")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value == 0x7FFFFFFF)
|
|
pkt_dev->delay = ULLONG_MAX;
|
|
else
|
|
pkt_dev->delay = (u64)value;
|
|
|
|
sprintf(pg_result, "OK: delay=%llu",
|
|
(unsigned long long) pkt_dev->delay);
|
|
return count;
|
|
}
|
|
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)
|
|
pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
|
|
|
|
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)
|
|
pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
|
|
|
|
sprintf(pg_result, "OK: rate=%lu", value);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "udp_src_min")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value != pkt_dev->udp_src_min) {
|
|
pkt_dev->udp_src_min = value;
|
|
pkt_dev->cur_udp_src = value;
|
|
}
|
|
sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "udp_dst_min")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value != pkt_dev->udp_dst_min) {
|
|
pkt_dev->udp_dst_min = value;
|
|
pkt_dev->cur_udp_dst = value;
|
|
}
|
|
sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "udp_src_max")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value != pkt_dev->udp_src_max) {
|
|
pkt_dev->udp_src_max = value;
|
|
pkt_dev->cur_udp_src = value;
|
|
}
|
|
sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "udp_dst_max")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value != pkt_dev->udp_dst_max) {
|
|
pkt_dev->udp_dst_max = value;
|
|
pkt_dev->cur_udp_dst = value;
|
|
}
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
if ((value > 0) &&
|
|
((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
|
|
!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
|
|
return -ENOTSUPP;
|
|
i += len;
|
|
pkt_dev->clone_skb = value;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
pkt_dev->count = value;
|
|
sprintf(pg_result, "OK: count=%llu",
|
|
(unsigned long long)pkt_dev->count);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "src_mac_count")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (pkt_dev->src_mac_count != value) {
|
|
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);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "dst_mac_count")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (pkt_dev->dst_mac_count != value) {
|
|
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);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "burst")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if ((value > 1) &&
|
|
((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
|
|
((pkt_dev->xmit_mode == M_START_XMIT) &&
|
|
(!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
|
|
return -ENOTSUPP;
|
|
pkt_dev->burst = value < 1 ? 1 : value;
|
|
sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
|
|
return count;
|
|
}
|
|
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);
|
|
if (pkt_dev->page) {
|
|
put_page(pkt_dev->page);
|
|
pkt_dev->page = NULL;
|
|
}
|
|
}
|
|
else
|
|
sprintf(pg_result, "ERROR: node not possible");
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "xmit_mode")) {
|
|
char f[32];
|
|
|
|
memset(f, 0, 32);
|
|
len = strn_len(&user_buffer[i], sizeof(f) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
if (copy_from_user(f, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
i += len;
|
|
|
|
if (strcmp(f, "start_xmit") == 0) {
|
|
pkt_dev->xmit_mode = M_START_XMIT;
|
|
} else if (strcmp(f, "netif_receive") == 0) {
|
|
/* clone_skb set earlier, not supported in this mode */
|
|
if (pkt_dev->clone_skb > 0)
|
|
return -ENOTSUPP;
|
|
|
|
pkt_dev->xmit_mode = M_NETIF_RECEIVE;
|
|
|
|
/* make sure new packet is allocated every time
|
|
* pktgen_xmit() is called
|
|
*/
|
|
pkt_dev->last_ok = 1;
|
|
|
|
/* override clone_skb if user passed default value
|
|
* at module loading time
|
|
*/
|
|
pkt_dev->clone_skb = 0;
|
|
} else if (strcmp(f, "queue_xmit") == 0) {
|
|
pkt_dev->xmit_mode = M_QUEUE_XMIT;
|
|
pkt_dev->last_ok = 1;
|
|
} else {
|
|
sprintf(pg_result,
|
|
"xmit_mode -:%s:- unknown\nAvailable modes: %s",
|
|
f, "start_xmit, netif_receive\n");
|
|
return count;
|
|
}
|
|
sprintf(pg_result, "OK: xmit_mode=%s", f);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "flag")) {
|
|
__u32 flag;
|
|
char f[32];
|
|
bool disable = false;
|
|
|
|
memset(f, 0, 32);
|
|
len = strn_len(&user_buffer[i], sizeof(f) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
if (copy_from_user(f, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
i += len;
|
|
|
|
flag = pktgen_read_flag(f, &disable);
|
|
|
|
if (flag) {
|
|
if (disable)
|
|
pkt_dev->flags &= ~flag;
|
|
else
|
|
pkt_dev->flags |= flag;
|
|
} else {
|
|
sprintf(pg_result,
|
|
"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
|
|
f,
|
|
"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
|
|
"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
|
|
"MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
|
|
"QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
|
|
"NO_TIMESTAMP, "
|
|
#ifdef CONFIG_XFRM
|
|
"IPSEC, "
|
|
#endif
|
|
"NODE_ALLOC\n");
|
|
return count;
|
|
}
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
if (strcmp(buf, pkt_dev->dst_min) != 0) {
|
|
memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
|
|
strcpy(pkt_dev->dst_min, buf);
|
|
pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
|
|
pkt_dev->cur_daddr = pkt_dev->daddr_min;
|
|
}
|
|
if (debug)
|
|
pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
|
|
i += len;
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
if (strcmp(buf, pkt_dev->dst_max) != 0) {
|
|
memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
|
|
strcpy(pkt_dev->dst_max, buf);
|
|
pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
|
|
pkt_dev->cur_daddr = pkt_dev->daddr_max;
|
|
}
|
|
if (debug)
|
|
pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
pkt_dev->flags |= F_IPV6;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
|
|
in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
|
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
|
|
|
|
pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
|
|
|
|
if (debug)
|
|
pr_debug("dst6 set to: %s\n", buf);
|
|
|
|
i += len;
|
|
sprintf(pg_result, "OK: dst6=%s", buf);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "dst6_min")) {
|
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
pkt_dev->flags |= F_IPV6;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
|
|
in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
|
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
|
|
|
|
pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
|
|
if (debug)
|
|
pr_debug("dst6_min set to: %s\n", buf);
|
|
|
|
i += len;
|
|
sprintf(pg_result, "OK: dst6_min=%s", buf);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "dst6_max")) {
|
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
pkt_dev->flags |= F_IPV6;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
|
|
in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
|
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
|
|
|
|
if (debug)
|
|
pr_debug("dst6_max set to: %s\n", buf);
|
|
|
|
i += len;
|
|
sprintf(pg_result, "OK: dst6_max=%s", buf);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "src6")) {
|
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
pkt_dev->flags |= F_IPV6;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
|
|
in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
|
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
|
|
|
|
pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
|
|
|
|
if (debug)
|
|
pr_debug("src6 set to: %s\n", buf);
|
|
|
|
i += len;
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
if (strcmp(buf, pkt_dev->src_min) != 0) {
|
|
memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
|
|
strcpy(pkt_dev->src_min, buf);
|
|
pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
|
|
pkt_dev->cur_saddr = pkt_dev->saddr_min;
|
|
}
|
|
if (debug)
|
|
pr_debug("src_min set to: %s\n", pkt_dev->src_min);
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
if (copy_from_user(buf, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
buf[len] = 0;
|
|
if (strcmp(buf, pkt_dev->src_max) != 0) {
|
|
memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
|
|
strcpy(pkt_dev->src_max, buf);
|
|
pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
|
|
pkt_dev->cur_saddr = pkt_dev->saddr_max;
|
|
}
|
|
if (debug)
|
|
pr_debug("src_max set to: %s\n", pkt_dev->src_max);
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
memset(valstr, 0, sizeof(valstr));
|
|
if (copy_from_user(valstr, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
|
|
if (!mac_pton(valstr, pkt_dev->dst_mac))
|
|
return -EINVAL;
|
|
/* Set up Dest MAC */
|
|
ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
|
|
|
|
sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "src_mac")) {
|
|
len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
memset(valstr, 0, sizeof(valstr));
|
|
if (copy_from_user(valstr, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
|
|
if (!mac_pton(valstr, pkt_dev->src_mac))
|
|
return -EINVAL;
|
|
/* Set up Src MAC */
|
|
ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
|
|
|
|
sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "clear_counters")) {
|
|
pktgen_clear_counters(pkt_dev);
|
|
sprintf(pg_result, "OK: Clearing counters.\n");
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "flows")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value > MAX_CFLOWS)
|
|
value = MAX_CFLOWS;
|
|
|
|
pkt_dev->cflows = value;
|
|
sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
|
|
return count;
|
|
}
|
|
#ifdef CONFIG_XFRM
|
|
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;
|
|
}
|
|
#endif
|
|
if (!strcmp(name, "flowlen")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
pkt_dev->lflow = value;
|
|
sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "queue_map_min")) {
|
|
len = num_arg(&user_buffer[i], 5, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
pkt_dev->queue_map_max = value;
|
|
sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "mpls")) {
|
|
unsigned int n, cnt;
|
|
|
|
len = get_labels(&user_buffer[i], pkt_dev);
|
|
if (len < 0)
|
|
return len;
|
|
i += len;
|
|
cnt = sprintf(pg_result, "OK: mpls=");
|
|
for (n = 0; n < pkt_dev->nr_labels; n++)
|
|
cnt += sprintf(pg_result + cnt,
|
|
"%08x%s", ntohl(pkt_dev->labels[n]),
|
|
n == pkt_dev->nr_labels-1 ? "" : ",");
|
|
|
|
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)
|
|
pr_debug("VLAN/SVLAN auto turned off\n");
|
|
}
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "vlan_id")) {
|
|
len = num_arg(&user_buffer[i], 4, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if (value <= 4095) {
|
|
pkt_dev->vlan_id = value; /* turn on VLAN */
|
|
|
|
if (debug)
|
|
pr_debug("VLAN turned on\n");
|
|
|
|
if (debug && pkt_dev->nr_labels)
|
|
pr_debug("MPLS auto turned off\n");
|
|
|
|
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)
|
|
pr_debug("VLAN/SVLAN turned off\n");
|
|
}
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "vlan_p")) {
|
|
len = num_arg(&user_buffer[i], 1, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
|
|
pkt_dev->svlan_id = value; /* turn on SVLAN */
|
|
|
|
if (debug)
|
|
pr_debug("SVLAN turned on\n");
|
|
|
|
if (debug && pkt_dev->nr_labels)
|
|
pr_debug("MPLS auto turned off\n");
|
|
|
|
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)
|
|
pr_debug("VLAN/SVLAN turned off\n");
|
|
}
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "svlan_p")) {
|
|
len = num_arg(&user_buffer[i], 1, &value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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");
|
|
}
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(name, "tos")) {
|
|
__u32 tmp_value = 0;
|
|
len = hex32_arg(&user_buffer[i], 2, &tmp_value);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int pktgen_if_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, pktgen_if_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations pktgen_if_fops = {
|
|
.open = pktgen_if_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.write = pktgen_if_write,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int pktgen_thread_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct pktgen_thread *t = seq->private;
|
|
const struct pktgen_dev *pkt_dev;
|
|
|
|
BUG_ON(!t);
|
|
|
|
seq_puts(seq, "Running: ");
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
|
|
if (pkt_dev->running)
|
|
seq_printf(seq, "%s ", pkt_dev->odevname);
|
|
|
|
seq_puts(seq, "\nStopped: ");
|
|
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
|
|
if (!pkt_dev->running)
|
|
seq_printf(seq, "%s ", pkt_dev->odevname);
|
|
|
|
if (t->result[0])
|
|
seq_printf(seq, "\nResult: %s\n", t->result);
|
|
else
|
|
seq_puts(seq, "\nResult: NA\n");
|
|
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t pktgen_thread_write(struct file *file,
|
|
const char __user * user_buffer,
|
|
size_t count, loff_t * offset)
|
|
{
|
|
struct seq_file *seq = file->private_data;
|
|
struct pktgen_thread *t = seq->private;
|
|
int i, max, len, ret;
|
|
char name[40];
|
|
char *pg_result;
|
|
|
|
if (count < 1) {
|
|
// sprintf(pg_result, "Wrong command format");
|
|
return -EINVAL;
|
|
}
|
|
|
|
max = count;
|
|
len = count_trail_chars(user_buffer, max);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i = len;
|
|
|
|
/* Read variable name */
|
|
|
|
len = strn_len(&user_buffer[i], sizeof(name) - 1);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
memset(name, 0, sizeof(name));
|
|
if (copy_from_user(name, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
i += len;
|
|
|
|
max = count - i;
|
|
len = count_trail_chars(&user_buffer[i], max);
|
|
if (len < 0)
|
|
return len;
|
|
|
|
i += len;
|
|
|
|
if (debug)
|
|
pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
|
|
|
|
if (!t) {
|
|
pr_err("ERROR: No thread\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
pg_result = &(t->result[0]);
|
|
|
|
if (!strcmp(name, "add_device")) {
|
|
char f[32];
|
|
memset(f, 0, 32);
|
|
len = strn_len(&user_buffer[i], sizeof(f) - 1);
|
|
if (len < 0) {
|
|
ret = len;
|
|
goto out;
|
|
}
|
|
if (copy_from_user(f, &user_buffer[i], len))
|
|
return -EFAULT;
|
|
i += len;
|
|
mutex_lock(&pktgen_thread_lock);
|
|
ret = pktgen_add_device(t, f);
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
if (!ret) {
|
|
ret = count;
|
|
sprintf(pg_result, "OK: add_device=%s", f);
|
|
} else
|
|
sprintf(pg_result, "ERROR: can not add device %s", f);
|
|
goto out;
|
|
}
|
|
|
|
if (!strcmp(name, "rem_device_all")) {
|
|
mutex_lock(&pktgen_thread_lock);
|
|
t->control |= T_REMDEVALL;
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
|
|
ret = count;
|
|
sprintf(pg_result, "OK: rem_device_all");
|
|
goto out;
|
|
}
|
|
|
|
if (!strcmp(name, "max_before_softirq")) {
|
|
sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
|
|
ret = count;
|
|
goto out;
|
|
}
|
|
|
|
ret = -EINVAL;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int pktgen_thread_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, pktgen_thread_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations pktgen_thread_fops = {
|
|
.open = pktgen_thread_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.write = pktgen_thread_write,
|
|
.release = single_release,
|
|
};
|
|
|
|
/* Think find or remove for NN */
|
|
static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
|
|
const char *ifname, int remove)
|
|
{
|
|
struct pktgen_thread *t;
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
bool exact = (remove == FIND);
|
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) {
|
|
pkt_dev = pktgen_find_dev(t, ifname, exact);
|
|
if (pkt_dev) {
|
|
if (remove) {
|
|
pkt_dev->removal_mark = 1;
|
|
t->control |= T_REMDEV;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return pkt_dev;
|
|
}
|
|
|
|
/*
|
|
* mark a device for removal
|
|
*/
|
|
static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
|
|
{
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
const int max_tries = 10, msec_per_try = 125;
|
|
int i = 0;
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
pr_debug("%s: marking %s for removal\n", __func__, ifname);
|
|
|
|
while (1) {
|
|
|
|
pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
|
|
if (pkt_dev == NULL)
|
|
break; /* success */
|
|
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
pr_debug("%s: waiting for %s to disappear....\n",
|
|
__func__, ifname);
|
|
schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
|
|
mutex_lock(&pktgen_thread_lock);
|
|
|
|
if (++i >= max_tries) {
|
|
pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
|
|
__func__, msec_per_try * i, ifname);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
}
|
|
|
|
static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
|
|
{
|
|
struct pktgen_thread *t;
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) {
|
|
struct pktgen_dev *pkt_dev;
|
|
|
|
if_lock(t);
|
|
list_for_each_entry(pkt_dev, &t->if_list, list) {
|
|
if (pkt_dev->odev != dev)
|
|
continue;
|
|
|
|
proc_remove(pkt_dev->entry);
|
|
|
|
pkt_dev->entry = proc_create_data(dev->name, 0600,
|
|
pn->proc_dir,
|
|
&pktgen_if_fops,
|
|
pkt_dev);
|
|
if (!pkt_dev->entry)
|
|
pr_err("can't move proc entry for '%s'\n",
|
|
dev->name);
|
|
break;
|
|
}
|
|
if_unlock(t);
|
|
}
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
}
|
|
|
|
static int pktgen_device_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
|
|
|
|
if (pn->pktgen_exiting)
|
|
return NOTIFY_DONE;
|
|
|
|
/* It is OK that we do not hold the group lock right now,
|
|
* as we run under the RTNL lock.
|
|
*/
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGENAME:
|
|
pktgen_change_name(pn, dev);
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
|
pktgen_mark_device(pn, dev->name);
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
|
|
struct pktgen_dev *pkt_dev,
|
|
const char *ifname)
|
|
{
|
|
char b[IFNAMSIZ+5];
|
|
int i;
|
|
|
|
for (i = 0; ifname[i] != '@'; i++) {
|
|
if (i == IFNAMSIZ)
|
|
break;
|
|
|
|
b[i] = ifname[i];
|
|
}
|
|
b[i] = 0;
|
|
|
|
return dev_get_by_name(pn->net, b);
|
|
}
|
|
|
|
|
|
/* Associate pktgen_dev with a device. */
|
|
|
|
static int pktgen_setup_dev(const struct pktgen_net *pn,
|
|
struct pktgen_dev *pkt_dev, const char *ifname)
|
|
{
|
|
struct net_device *odev;
|
|
int err;
|
|
|
|
/* Clean old setups */
|
|
if (pkt_dev->odev) {
|
|
dev_put(pkt_dev->odev);
|
|
pkt_dev->odev = NULL;
|
|
}
|
|
|
|
odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
|
|
if (!odev) {
|
|
pr_err("no such netdevice: \"%s\"\n", ifname);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (odev->type != ARPHRD_ETHER) {
|
|
pr_err("not an ethernet device: \"%s\"\n", ifname);
|
|
err = -EINVAL;
|
|
} else if (!netif_running(odev)) {
|
|
pr_err("device is down: \"%s\"\n", ifname);
|
|
err = -ENETDOWN;
|
|
} else {
|
|
pkt_dev->odev = odev;
|
|
return 0;
|
|
}
|
|
|
|
dev_put(odev);
|
|
return err;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
int ntxq;
|
|
|
|
if (!pkt_dev->odev) {
|
|
pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
|
|
sprintf(pkt_dev->result,
|
|
"ERROR: pkt_dev->odev == NULL in setup_inject.\n");
|
|
return;
|
|
}
|
|
|
|
/* make sure that we don't pick a non-existing transmit queue */
|
|
ntxq = pkt_dev->odev->real_num_tx_queues;
|
|
|
|
if (ntxq <= pkt_dev->queue_map_min) {
|
|
pr_warn("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);
|
|
pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
|
|
}
|
|
if (pkt_dev->queue_map_max >= ntxq) {
|
|
pr_warn("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);
|
|
pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
|
|
}
|
|
|
|
/* Default to the interface's mac if not explicitly set. */
|
|
|
|
if (is_zero_ether_addr(pkt_dev->src_mac))
|
|
ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
|
|
|
|
/* Set up Dest MAC */
|
|
ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
|
|
|
|
if (pkt_dev->flags & F_IPV6) {
|
|
int i, set = 0, err = 1;
|
|
struct inet6_dev *idev;
|
|
|
|
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;
|
|
}
|
|
|
|
for (i = 0; i < sizeof(struct in6_addr); i++)
|
|
if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
|
|
set = 1;
|
|
break;
|
|
}
|
|
|
|
if (!set) {
|
|
|
|
/*
|
|
* Use linklevel address if unconfigured.
|
|
*
|
|
* use ipv6_get_lladdr if/when it's get exported
|
|
*/
|
|
|
|
rcu_read_lock();
|
|
idev = __in6_dev_get(pkt_dev->odev);
|
|
if (idev) {
|
|
struct inet6_ifaddr *ifp;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
list_for_each_entry(ifp, &idev->addr_list, if_list) {
|
|
if ((ifp->scope & IFA_LINK) &&
|
|
!(ifp->flags & IFA_F_TENTATIVE)) {
|
|
pkt_dev->cur_in6_saddr = ifp->addr;
|
|
err = 0;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
rcu_read_unlock();
|
|
if (err)
|
|
pr_err("ERROR: IPv6 link address not available\n");
|
|
}
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
pkt_dev->saddr_min = 0;
|
|
pkt_dev->saddr_max = 0;
|
|
if (strlen(pkt_dev->src_min) == 0) {
|
|
|
|
struct in_device *in_dev;
|
|
|
|
rcu_read_lock();
|
|
in_dev = __in_dev_get_rcu(pkt_dev->odev);
|
|
if (in_dev) {
|
|
if (in_dev->ifa_list) {
|
|
pkt_dev->saddr_min =
|
|
in_dev->ifa_list->ifa_address;
|
|
pkt_dev->saddr_max = pkt_dev->saddr_min;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
} else {
|
|
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);
|
|
}
|
|
/* Initialize current values. */
|
|
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;
|
|
|
|
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;
|
|
pkt_dev->nflows = 0;
|
|
}
|
|
|
|
|
|
static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
|
|
{
|
|
ktime_t start_time, end_time;
|
|
s64 remaining;
|
|
struct hrtimer_sleeper t;
|
|
|
|
hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
|
|
hrtimer_set_expires(&t.timer, spin_until);
|
|
|
|
remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
|
|
if (remaining <= 0)
|
|
goto out;
|
|
|
|
start_time = ktime_get();
|
|
if (remaining < 100000) {
|
|
/* for small delays (<100us), just loop until limit is reached */
|
|
do {
|
|
end_time = ktime_get();
|
|
} while (ktime_compare(end_time, spin_until) < 0);
|
|
} else {
|
|
/* see do_nanosleep */
|
|
hrtimer_init_sleeper(&t, current);
|
|
do {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
|
|
|
|
if (likely(t.task))
|
|
schedule();
|
|
|
|
hrtimer_cancel(&t.timer);
|
|
} while (t.task && pkt_dev->running && !signal_pending(current));
|
|
__set_current_state(TASK_RUNNING);
|
|
end_time = ktime_get();
|
|
}
|
|
|
|
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
|
|
out:
|
|
pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
|
|
destroy_hrtimer_on_stack(&t.timer);
|
|
}
|
|
|
|
static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
|
|
{
|
|
pkt_dev->pkt_overhead = 0;
|
|
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);
|
|
}
|
|
|
|
static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
|
|
{
|
|
return !!(pkt_dev->flows[flow].flags & F_INIT);
|
|
}
|
|
|
|
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;
|
|
pkt_dev->flows[flow].flags = 0;
|
|
pkt_dev->curfl += 1;
|
|
if (pkt_dev->curfl >= pkt_dev->cflows)
|
|
pkt_dev->curfl = 0; /*reset */
|
|
}
|
|
} else {
|
|
flow = prandom_u32() % pkt_dev->cflows;
|
|
pkt_dev->curfl = flow;
|
|
|
|
if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
|
|
pkt_dev->flows[flow].count = 0;
|
|
pkt_dev->flows[flow].flags = 0;
|
|
}
|
|
}
|
|
|
|
return pkt_dev->curfl;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_XFRM
|
|
/* If there was already an IPSEC SA, we keep it as is, else
|
|
* we go look for it ...
|
|
*/
|
|
#define DUMMY_MARK 0
|
|
static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
|
|
{
|
|
struct xfrm_state *x = pkt_dev->flows[flow].x;
|
|
struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
|
|
if (!x) {
|
|
|
|
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, 0,
|
|
(xfrm_address_t *)&pkt_dev->cur_daddr,
|
|
(xfrm_address_t *)&pkt_dev->cur_saddr,
|
|
AF_INET,
|
|
pkt_dev->ipsmode,
|
|
pkt_dev->ipsproto, 0);
|
|
}
|
|
if (x) {
|
|
pkt_dev->flows[flow].x = x;
|
|
set_pkt_overhead(pkt_dev);
|
|
pkt_dev->pkt_overhead += x->props.header_len;
|
|
}
|
|
|
|
}
|
|
}
|
|
#endif
|
|
static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
|
|
{
|
|
|
|
if (pkt_dev->flags & F_QUEUE_MAP_CPU)
|
|
pkt_dev->cur_queue_map = smp_processor_id();
|
|
|
|
else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
|
|
__u16 t;
|
|
if (pkt_dev->flags & F_QUEUE_MAP_RND) {
|
|
t = prandom_u32() %
|
|
(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;
|
|
}
|
|
pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
|
|
}
|
|
|
|
/* Increment/randomize headers according to flags and current values
|
|
* for IP src/dest, UDP src/dst port, MAC-Addr src/dst
|
|
*/
|
|
static void mod_cur_headers(struct pktgen_dev *pkt_dev)
|
|
{
|
|
__u32 imn;
|
|
__u32 imx;
|
|
int flow = 0;
|
|
|
|
if (pkt_dev->cflows)
|
|
flow = f_pick(pkt_dev);
|
|
|
|
/* Deal with source MAC */
|
|
if (pkt_dev->src_mac_count > 1) {
|
|
__u32 mc;
|
|
__u32 tmp;
|
|
|
|
if (pkt_dev->flags & F_MACSRC_RND)
|
|
mc = prandom_u32() % pkt_dev->src_mac_count;
|
|
else {
|
|
mc = pkt_dev->cur_src_mac_offset++;
|
|
if (pkt_dev->cur_src_mac_offset >=
|
|
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)
|
|
mc = prandom_u32() % pkt_dev->dst_mac_count;
|
|
|
|
else {
|
|
mc = pkt_dev->cur_dst_mac_offset++;
|
|
if (pkt_dev->cur_dst_mac_offset >=
|
|
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;
|
|
}
|
|
|
|
if (pkt_dev->flags & F_MPLS_RND) {
|
|
unsigned int i;
|
|
for (i = 0; i < pkt_dev->nr_labels; i++)
|
|
if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
|
|
pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
|
|
((__force __be32)prandom_u32() &
|
|
htonl(0x000fffff));
|
|
}
|
|
|
|
if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
|
|
pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
|
|
}
|
|
|
|
if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
|
|
pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
|
|
}
|
|
|
|
if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
|
|
if (pkt_dev->flags & F_UDPSRC_RND)
|
|
pkt_dev->cur_udp_src = prandom_u32() %
|
|
(pkt_dev->udp_src_max - pkt_dev->udp_src_min)
|
|
+ pkt_dev->udp_src_min;
|
|
|
|
else {
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
|
|
if (pkt_dev->flags & F_UDPDST_RND) {
|
|
pkt_dev->cur_udp_dst = prandom_u32() %
|
|
(pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
|
|
+ pkt_dev->udp_dst_min;
|
|
} else {
|
|
pkt_dev->cur_udp_dst++;
|
|
if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
|
|
pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
|
|
}
|
|
}
|
|
|
|
if (!(pkt_dev->flags & F_IPV6)) {
|
|
|
|
imn = ntohl(pkt_dev->saddr_min);
|
|
imx = ntohl(pkt_dev->saddr_max);
|
|
if (imn < imx) {
|
|
__u32 t;
|
|
if (pkt_dev->flags & F_IPSRC_RND)
|
|
t = prandom_u32() % (imx - imn) + imn;
|
|
else {
|
|
t = ntohl(pkt_dev->cur_saddr);
|
|
t++;
|
|
if (t > imx)
|
|
t = imn;
|
|
|
|
}
|
|
pkt_dev->cur_saddr = htonl(t);
|
|
}
|
|
|
|
if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
|
|
pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
|
|
} else {
|
|
imn = ntohl(pkt_dev->daddr_min);
|
|
imx = ntohl(pkt_dev->daddr_max);
|
|
if (imn < imx) {
|
|
__u32 t;
|
|
__be32 s;
|
|
if (pkt_dev->flags & F_IPDST_RND) {
|
|
|
|
do {
|
|
t = prandom_u32() %
|
|
(imx - imn) + imn;
|
|
s = htonl(t);
|
|
} while (ipv4_is_loopback(s) ||
|
|
ipv4_is_multicast(s) ||
|
|
ipv4_is_lbcast(s) ||
|
|
ipv4_is_zeronet(s) ||
|
|
ipv4_is_local_multicast(s));
|
|
pkt_dev->cur_daddr = s;
|
|
} else {
|
|
t = ntohl(pkt_dev->cur_daddr);
|
|
t++;
|
|
if (t > imx) {
|
|
t = imn;
|
|
}
|
|
pkt_dev->cur_daddr = htonl(t);
|
|
}
|
|
}
|
|
if (pkt_dev->cflows) {
|
|
pkt_dev->flows[flow].flags |= F_INIT;
|
|
pkt_dev->flows[flow].cur_daddr =
|
|
pkt_dev->cur_daddr;
|
|
#ifdef CONFIG_XFRM
|
|
if (pkt_dev->flags & F_IPSEC)
|
|
get_ipsec_sa(pkt_dev, flow);
|
|
#endif
|
|
pkt_dev->nflows++;
|
|
}
|
|
}
|
|
} else { /* IPV6 * */
|
|
|
|
if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
|
|
int i;
|
|
|
|
/* Only random destinations yet */
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
pkt_dev->cur_in6_daddr.s6_addr32[i] =
|
|
(((__force __be32)prandom_u32() |
|
|
pkt_dev->min_in6_daddr.s6_addr32[i]) &
|
|
pkt_dev->max_in6_daddr.s6_addr32[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
|
|
__u32 t;
|
|
if (pkt_dev->flags & F_TXSIZE_RND) {
|
|
t = prandom_u32() %
|
|
(pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
|
|
+ pkt_dev->min_pkt_size;
|
|
} else {
|
|
t = pkt_dev->cur_pkt_size + 1;
|
|
if (t > pkt_dev->max_pkt_size)
|
|
t = pkt_dev->min_pkt_size;
|
|
}
|
|
pkt_dev->cur_pkt_size = t;
|
|
}
|
|
|
|
set_cur_queue_map(pkt_dev);
|
|
|
|
pkt_dev->flows[flow].count++;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_XFRM
|
|
static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
|
|
|
|
[RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
|
|
};
|
|
|
|
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;
|
|
struct net *net = dev_net(pkt_dev->odev);
|
|
|
|
if (!x)
|
|
return 0;
|
|
/* XXX: we dont support tunnel mode for now until
|
|
* we resolve the dst issue */
|
|
if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
|
|
return 0;
|
|
|
|
/* 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->xdst.u.dst | SKB_DST_NOREF;
|
|
|
|
rcu_read_lock_bh();
|
|
err = x->outer_mode->output(x, skb);
|
|
rcu_read_unlock_bh();
|
|
if (err) {
|
|
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
|
|
goto error;
|
|
}
|
|
err = x->type->output(x, skb);
|
|
if (err) {
|
|
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
|
|
goto error;
|
|
}
|
|
spin_lock_bh(&x->lock);
|
|
x->curlft.bytes += skb->len;
|
|
x->curlft.packets++;
|
|
spin_unlock_bh(&x->lock);
|
|
error:
|
|
return err;
|
|
}
|
|
|
|
static void free_SAs(struct pktgen_dev *pkt_dev)
|
|
{
|
|
if (pkt_dev->cflows) {
|
|
/* let go of the SAs if we have them */
|
|
int i;
|
|
for (i = 0; i < pkt_dev->cflows; i++) {
|
|
struct xfrm_state *x = pkt_dev->flows[i].x;
|
|
if (x) {
|
|
xfrm_state_put(x);
|
|
pkt_dev->flows[i].x = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int process_ipsec(struct pktgen_dev *pkt_dev,
|
|
struct sk_buff *skb, __be16 protocol)
|
|
{
|
|
if (pkt_dev->flags & F_IPSEC) {
|
|
struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
|
|
int nhead = 0;
|
|
if (x) {
|
|
struct ethhdr *eth;
|
|
struct iphdr *iph;
|
|
int ret;
|
|
|
|
nhead = x->props.header_len - skb_headroom(skb);
|
|
if (nhead > 0) {
|
|
ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
|
|
if (ret < 0) {
|
|
pr_err("Error expanding ipsec packet %d\n",
|
|
ret);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
/* ipsec is not expecting ll header */
|
|
skb_pull(skb, ETH_HLEN);
|
|
ret = pktgen_output_ipsec(skb, pkt_dev);
|
|
if (ret) {
|
|
pr_err("Error creating ipsec packet %d\n", ret);
|
|
goto err;
|
|
}
|
|
/* restore ll */
|
|
eth = skb_push(skb, ETH_HLEN);
|
|
memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
|
|
eth->h_proto = protocol;
|
|
|
|
/* 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);
|
|
}
|
|
}
|
|
return 1;
|
|
err:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
|
|
{
|
|
unsigned int i;
|
|
for (i = 0; i < pkt_dev->nr_labels; i++)
|
|
*mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
|
|
|
|
mpls--;
|
|
*mpls |= MPLS_STACK_BOTTOM;
|
|
}
|
|
|
|
static inline __be16 build_tci(unsigned int id, unsigned int cfi,
|
|
unsigned int prio)
|
|
{
|
|
return htons(id | (cfi << 12) | (prio << 13));
|
|
}
|
|
|
|
static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
|
|
int datalen)
|
|
{
|
|
struct timespec64 timestamp;
|
|
struct pktgen_hdr *pgh;
|
|
|
|
pgh = skb_put(skb, sizeof(*pgh));
|
|
datalen -= sizeof(*pgh);
|
|
|
|
if (pkt_dev->nfrags <= 0) {
|
|
skb_put_zero(skb, datalen);
|
|
} else {
|
|
int frags = pkt_dev->nfrags;
|
|
int i, len;
|
|
int frag_len;
|
|
|
|
|
|
if (frags > MAX_SKB_FRAGS)
|
|
frags = MAX_SKB_FRAGS;
|
|
len = datalen - frags * PAGE_SIZE;
|
|
if (len > 0) {
|
|
skb_put_zero(skb, len);
|
|
datalen = frags * PAGE_SIZE;
|
|
}
|
|
|
|
i = 0;
|
|
frag_len = (datalen/frags) < PAGE_SIZE ?
|
|
(datalen/frags) : PAGE_SIZE;
|
|
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;
|
|
}
|
|
get_page(pkt_dev->page);
|
|
skb_frag_set_page(skb, i, pkt_dev->page);
|
|
skb_shinfo(skb)->frags[i].page_offset = 0;
|
|
/*last fragment, fill rest of data*/
|
|
if (i == (frags - 1))
|
|
skb_frag_size_set(&skb_shinfo(skb)->frags[i],
|
|
(datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
|
|
else
|
|
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]);
|
|
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);
|
|
|
|
if (pkt_dev->flags & F_NO_TIMESTAMP) {
|
|
pgh->tv_sec = 0;
|
|
pgh->tv_usec = 0;
|
|
} else {
|
|
/*
|
|
* pgh->tv_sec wraps in y2106 when interpreted as unsigned
|
|
* as done by wireshark, or y2038 when interpreted as signed.
|
|
* This is probably harmless, but if anyone wants to improve
|
|
* it, we could introduce a variant that puts 64-bit nanoseconds
|
|
* into the respective header bytes.
|
|
* This would also be slightly faster to read.
|
|
*/
|
|
ktime_get_real_ts64(×tamp);
|
|
pgh->tv_sec = htonl(timestamp.tv_sec);
|
|
pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
|
|
}
|
|
}
|
|
|
|
static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
unsigned int extralen = LL_RESERVED_SPACE(dev);
|
|
struct sk_buff *skb = NULL;
|
|
unsigned int size;
|
|
|
|
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);
|
|
}
|
|
|
|
/* the caller pre-fetches from skb->data and reserves for the mac hdr */
|
|
if (likely(skb))
|
|
skb_reserve(skb, extralen - 16);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
__u8 *eth;
|
|
struct udphdr *udph;
|
|
int datalen, iplen;
|
|
struct iphdr *iph;
|
|
__be16 protocol = htons(ETH_P_IP);
|
|
__be32 *mpls;
|
|
__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 */
|
|
u16 queue_map;
|
|
|
|
if (pkt_dev->nr_labels)
|
|
protocol = htons(ETH_P_MPLS_UC);
|
|
|
|
if (pkt_dev->vlan_id != 0xffff)
|
|
protocol = htons(ETH_P_8021Q);
|
|
|
|
/* Update any of the values, used when we're incrementing various
|
|
* fields.
|
|
*/
|
|
mod_cur_headers(pkt_dev);
|
|
queue_map = pkt_dev->cur_queue_map;
|
|
|
|
skb = pktgen_alloc_skb(odev, pkt_dev);
|
|
if (!skb) {
|
|
sprintf(pkt_dev->result, "No memory");
|
|
return NULL;
|
|
}
|
|
|
|
prefetchw(skb->data);
|
|
skb_reserve(skb, 16);
|
|
|
|
/* Reserve for ethernet and IP header */
|
|
eth = skb_push(skb, 14);
|
|
mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
|
|
if (pkt_dev->nr_labels)
|
|
mpls_push(mpls, pkt_dev);
|
|
|
|
if (pkt_dev->vlan_id != 0xffff) {
|
|
if (pkt_dev->svlan_id != 0xffff) {
|
|
svlan_tci = skb_put(skb, sizeof(__be16));
|
|
*svlan_tci = build_tci(pkt_dev->svlan_id,
|
|
pkt_dev->svlan_cfi,
|
|
pkt_dev->svlan_p);
|
|
svlan_encapsulated_proto = skb_put(skb,
|
|
sizeof(__be16));
|
|
*svlan_encapsulated_proto = htons(ETH_P_8021Q);
|
|
}
|
|
vlan_tci = skb_put(skb, sizeof(__be16));
|
|
*vlan_tci = build_tci(pkt_dev->vlan_id,
|
|
pkt_dev->vlan_cfi,
|
|
pkt_dev->vlan_p);
|
|
vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
|
|
*vlan_encapsulated_proto = htons(ETH_P_IP);
|
|
}
|
|
|
|
skb_reset_mac_header(skb);
|
|
skb_set_network_header(skb, skb->len);
|
|
iph = skb_put(skb, sizeof(struct iphdr));
|
|
|
|
skb_set_transport_header(skb, skb->len);
|
|
udph = skb_put(skb, sizeof(struct udphdr));
|
|
skb_set_queue_mapping(skb, queue_map);
|
|
skb->priority = pkt_dev->skb_priority;
|
|
|
|
memcpy(eth, pkt_dev->hh, 12);
|
|
*(__be16 *) & eth[12] = protocol;
|
|
|
|
/* Eth + IPh + UDPh + mpls */
|
|
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
|
|
pkt_dev->pkt_overhead;
|
|
if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
|
|
datalen = sizeof(struct pktgen_hdr);
|
|
|
|
udph->source = htons(pkt_dev->cur_udp_src);
|
|
udph->dest = htons(pkt_dev->cur_udp_dst);
|
|
udph->len = htons(datalen + 8); /* DATA + udphdr */
|
|
udph->check = 0;
|
|
|
|
iph->ihl = 5;
|
|
iph->version = 4;
|
|
iph->ttl = 32;
|
|
iph->tos = pkt_dev->tos;
|
|
iph->protocol = IPPROTO_UDP; /* UDP */
|
|
iph->saddr = pkt_dev->cur_saddr;
|
|
iph->daddr = pkt_dev->cur_daddr;
|
|
iph->id = htons(pkt_dev->ip_id);
|
|
pkt_dev->ip_id++;
|
|
iph->frag_off = 0;
|
|
iplen = 20 + 8 + datalen;
|
|
iph->tot_len = htons(iplen);
|
|
ip_send_check(iph);
|
|
skb->protocol = protocol;
|
|
skb->dev = odev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
|
|
pktgen_finalize_skb(pkt_dev, skb, datalen);
|
|
|
|
if (!(pkt_dev->flags & F_UDPCSUM)) {
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
} else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
|
|
skb->ip_summed = CHECKSUM_PARTIAL;
|
|
skb->csum = 0;
|
|
udp4_hwcsum(skb, iph->saddr, iph->daddr);
|
|
} else {
|
|
__wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
|
|
|
|
/* add protocol-dependent pseudo-header */
|
|
udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
|
|
datalen + 8, IPPROTO_UDP, csum);
|
|
|
|
if (udph->check == 0)
|
|
udph->check = CSUM_MANGLED_0;
|
|
}
|
|
|
|
#ifdef CONFIG_XFRM
|
|
if (!process_ipsec(pkt_dev, skb, protocol))
|
|
return NULL;
|
|
#endif
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
__u8 *eth;
|
|
struct udphdr *udph;
|
|
int datalen, udplen;
|
|
struct ipv6hdr *iph;
|
|
__be16 protocol = htons(ETH_P_IPV6);
|
|
__be32 *mpls;
|
|
__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 */
|
|
u16 queue_map;
|
|
|
|
if (pkt_dev->nr_labels)
|
|
protocol = htons(ETH_P_MPLS_UC);
|
|
|
|
if (pkt_dev->vlan_id != 0xffff)
|
|
protocol = htons(ETH_P_8021Q);
|
|
|
|
/* Update any of the values, used when we're incrementing various
|
|
* fields.
|
|
*/
|
|
mod_cur_headers(pkt_dev);
|
|
queue_map = pkt_dev->cur_queue_map;
|
|
|
|
skb = pktgen_alloc_skb(odev, pkt_dev);
|
|
if (!skb) {
|
|
sprintf(pkt_dev->result, "No memory");
|
|
return NULL;
|
|
}
|
|
|
|
prefetchw(skb->data);
|
|
skb_reserve(skb, 16);
|
|
|
|
/* Reserve for ethernet and IP header */
|
|
eth = skb_push(skb, 14);
|
|
mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
|
|
if (pkt_dev->nr_labels)
|
|
mpls_push(mpls, pkt_dev);
|
|
|
|
if (pkt_dev->vlan_id != 0xffff) {
|
|
if (pkt_dev->svlan_id != 0xffff) {
|
|
svlan_tci = skb_put(skb, sizeof(__be16));
|
|
*svlan_tci = build_tci(pkt_dev->svlan_id,
|
|
pkt_dev->svlan_cfi,
|
|
pkt_dev->svlan_p);
|
|
svlan_encapsulated_proto = skb_put(skb,
|
|
sizeof(__be16));
|
|
*svlan_encapsulated_proto = htons(ETH_P_8021Q);
|
|
}
|
|
vlan_tci = skb_put(skb, sizeof(__be16));
|
|
*vlan_tci = build_tci(pkt_dev->vlan_id,
|
|
pkt_dev->vlan_cfi,
|
|
pkt_dev->vlan_p);
|
|
vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
|
|
*vlan_encapsulated_proto = htons(ETH_P_IPV6);
|
|
}
|
|
|
|
skb_reset_mac_header(skb);
|
|
skb_set_network_header(skb, skb->len);
|
|
iph = skb_put(skb, sizeof(struct ipv6hdr));
|
|
|
|
skb_set_transport_header(skb, skb->len);
|
|
udph = skb_put(skb, sizeof(struct udphdr));
|
|
skb_set_queue_mapping(skb, queue_map);
|
|
skb->priority = pkt_dev->skb_priority;
|
|
|
|
memcpy(eth, pkt_dev->hh, 12);
|
|
*(__be16 *) ð[12] = protocol;
|
|
|
|
/* Eth + IPh + UDPh + mpls */
|
|
datalen = pkt_dev->cur_pkt_size - 14 -
|
|
sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
|
|
pkt_dev->pkt_overhead;
|
|
|
|
if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
|
|
datalen = sizeof(struct pktgen_hdr);
|
|
net_info_ratelimited("increased datalen to %d\n", datalen);
|
|
}
|
|
|
|
udplen = datalen + sizeof(struct udphdr);
|
|
udph->source = htons(pkt_dev->cur_udp_src);
|
|
udph->dest = htons(pkt_dev->cur_udp_dst);
|
|
udph->len = htons(udplen);
|
|
udph->check = 0;
|
|
|
|
*(__be32 *) iph = htonl(0x60000000); /* Version + flow */
|
|
|
|
if (pkt_dev->traffic_class) {
|
|
/* Version + traffic class + flow (0) */
|
|
*(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
|
|
}
|
|
|
|
iph->hop_limit = 32;
|
|
|
|
iph->payload_len = htons(udplen);
|
|
iph->nexthdr = IPPROTO_UDP;
|
|
|
|
iph->daddr = pkt_dev->cur_in6_daddr;
|
|
iph->saddr = pkt_dev->cur_in6_saddr;
|
|
|
|
skb->protocol = protocol;
|
|
skb->dev = odev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
|
|
pktgen_finalize_skb(pkt_dev, skb, datalen);
|
|
|
|
if (!(pkt_dev->flags & F_UDPCSUM)) {
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
} else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_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 = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *fill_packet(struct net_device *odev,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
if (pkt_dev->flags & F_IPV6)
|
|
return fill_packet_ipv6(odev, pkt_dev);
|
|
else
|
|
return fill_packet_ipv4(odev, pkt_dev);
|
|
}
|
|
|
|
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
|
|
{
|
|
pkt_dev->seq_num = 1;
|
|
pkt_dev->idle_acc = 0;
|
|
pkt_dev->sofar = 0;
|
|
pkt_dev->tx_bytes = 0;
|
|
pkt_dev->errors = 0;
|
|
}
|
|
|
|
/* Set up structure for sending pkts, clear counters */
|
|
|
|
static void pktgen_run(struct pktgen_thread *t)
|
|
{
|
|
struct pktgen_dev *pkt_dev;
|
|
int started = 0;
|
|
|
|
func_enter();
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
|
|
|
|
/*
|
|
* setup odev and create initial packet.
|
|
*/
|
|
pktgen_setup_inject(pkt_dev);
|
|
|
|
if (pkt_dev->odev) {
|
|
pktgen_clear_counters(pkt_dev);
|
|
pkt_dev->skb = NULL;
|
|
pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
|
|
|
|
set_pkt_overhead(pkt_dev);
|
|
|
|
strcpy(pkt_dev->result, "Starting");
|
|
pkt_dev->running = 1; /* Cranke yeself! */
|
|
started++;
|
|
} else
|
|
strcpy(pkt_dev->result, "Error starting");
|
|
}
|
|
rcu_read_unlock();
|
|
if (started)
|
|
t->control &= ~(T_STOP);
|
|
}
|
|
|
|
static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
|
|
{
|
|
struct pktgen_thread *t;
|
|
|
|
func_enter();
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list)
|
|
t->control |= T_STOP;
|
|
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
}
|
|
|
|
static int thread_is_running(const struct pktgen_thread *t)
|
|
{
|
|
const struct pktgen_dev *pkt_dev;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
|
|
if (pkt_dev->running) {
|
|
rcu_read_unlock();
|
|
return 1;
|
|
}
|
|
rcu_read_unlock();
|
|
return 0;
|
|
}
|
|
|
|
static int pktgen_wait_thread_run(struct pktgen_thread *t)
|
|
{
|
|
while (thread_is_running(t)) {
|
|
|
|
msleep_interruptible(100);
|
|
|
|
if (signal_pending(current))
|
|
goto signal;
|
|
}
|
|
return 1;
|
|
signal:
|
|
return 0;
|
|
}
|
|
|
|
static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
|
|
{
|
|
struct pktgen_thread *t;
|
|
int sig = 1;
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) {
|
|
sig = pktgen_wait_thread_run(t);
|
|
if (sig == 0)
|
|
break;
|
|
}
|
|
|
|
if (sig == 0)
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list)
|
|
t->control |= (T_STOP);
|
|
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
return sig;
|
|
}
|
|
|
|
static void pktgen_run_all_threads(struct pktgen_net *pn)
|
|
{
|
|
struct pktgen_thread *t;
|
|
|
|
func_enter();
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list)
|
|
t->control |= (T_RUN);
|
|
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
|
|
/* Propagate thread->control */
|
|
schedule_timeout_interruptible(msecs_to_jiffies(125));
|
|
|
|
pktgen_wait_all_threads_run(pn);
|
|
}
|
|
|
|
static void pktgen_reset_all_threads(struct pktgen_net *pn)
|
|
{
|
|
struct pktgen_thread *t;
|
|
|
|
func_enter();
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list)
|
|
t->control |= (T_REMDEVALL);
|
|
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
|
|
/* Propagate thread->control */
|
|
schedule_timeout_interruptible(msecs_to_jiffies(125));
|
|
|
|
pktgen_wait_all_threads_run(pn);
|
|
}
|
|
|
|
static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
|
|
{
|
|
__u64 bps, mbps, pps;
|
|
char *p = pkt_dev->result;
|
|
ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
|
|
pkt_dev->started_at);
|
|
ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
|
|
|
|
p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
|
|
(unsigned long long)ktime_to_us(elapsed),
|
|
(unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
|
|
(unsigned long long)ktime_to_us(idle),
|
|
(unsigned long long)pkt_dev->sofar,
|
|
pkt_dev->cur_pkt_size, nr_frags);
|
|
|
|
pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
|
|
ktime_to_ns(elapsed));
|
|
|
|
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);
|
|
}
|
|
|
|
/* Set stopped-at timer, remove from running list, do counters & statistics */
|
|
static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
|
|
{
|
|
int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
|
|
|
|
if (!pkt_dev->running) {
|
|
pr_warn("interface: %s is already stopped\n",
|
|
pkt_dev->odevname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pkt_dev->running = 0;
|
|
kfree_skb(pkt_dev->skb);
|
|
pkt_dev->skb = NULL;
|
|
pkt_dev->stopped_at = ktime_get();
|
|
|
|
show_results(pkt_dev, nr_frags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
|
|
{
|
|
struct pktgen_dev *pkt_dev, *best = NULL;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
|
|
if (!pkt_dev->running)
|
|
continue;
|
|
if (best == NULL)
|
|
best = pkt_dev;
|
|
else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
|
|
best = pkt_dev;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return best;
|
|
}
|
|
|
|
static void pktgen_stop(struct pktgen_thread *t)
|
|
{
|
|
struct pktgen_dev *pkt_dev;
|
|
|
|
func_enter();
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
|
|
pktgen_stop_device(pkt_dev);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/*
|
|
* one of our devices needs to be removed - find it
|
|
* and remove it
|
|
*/
|
|
static void pktgen_rem_one_if(struct pktgen_thread *t)
|
|
{
|
|
struct list_head *q, *n;
|
|
struct pktgen_dev *cur;
|
|
|
|
func_enter();
|
|
|
|
list_for_each_safe(q, n, &t->if_list) {
|
|
cur = list_entry(q, struct pktgen_dev, list);
|
|
|
|
if (!cur->removal_mark)
|
|
continue;
|
|
|
|
kfree_skb(cur->skb);
|
|
cur->skb = NULL;
|
|
|
|
pktgen_remove_device(t, cur);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void pktgen_rem_all_ifs(struct pktgen_thread *t)
|
|
{
|
|
struct list_head *q, *n;
|
|
struct pktgen_dev *cur;
|
|
|
|
func_enter();
|
|
|
|
/* Remove all devices, free mem */
|
|
|
|
list_for_each_safe(q, n, &t->if_list) {
|
|
cur = list_entry(q, struct pktgen_dev, list);
|
|
|
|
kfree_skb(cur->skb);
|
|
cur->skb = NULL;
|
|
|
|
pktgen_remove_device(t, cur);
|
|
}
|
|
}
|
|
|
|
static void pktgen_rem_thread(struct pktgen_thread *t)
|
|
{
|
|
/* Remove from the thread list */
|
|
remove_proc_entry(t->tsk->comm, t->net->proc_dir);
|
|
}
|
|
|
|
static void pktgen_resched(struct pktgen_dev *pkt_dev)
|
|
{
|
|
ktime_t idle_start = ktime_get();
|
|
schedule();
|
|
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
|
|
}
|
|
|
|
static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
|
|
{
|
|
ktime_t idle_start = ktime_get();
|
|
|
|
while (refcount_read(&(pkt_dev->skb->users)) != 1) {
|
|
if (signal_pending(current))
|
|
break;
|
|
|
|
if (need_resched())
|
|
pktgen_resched(pkt_dev);
|
|
else
|
|
cpu_relax();
|
|
}
|
|
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
|
|
}
|
|
|
|
static void pktgen_xmit(struct pktgen_dev *pkt_dev)
|
|
{
|
|
unsigned int burst = READ_ONCE(pkt_dev->burst);
|
|
struct net_device *odev = pkt_dev->odev;
|
|
struct netdev_queue *txq;
|
|
struct sk_buff *skb;
|
|
int ret;
|
|
|
|
/* If device is offline, then don't send */
|
|
if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
|
|
pktgen_stop_device(pkt_dev);
|
|
return;
|
|
}
|
|
|
|
/* This is max DELAY, this has special meaning of
|
|
* "never transmit"
|
|
*/
|
|
if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
|
|
pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
|
|
return;
|
|
}
|
|
|
|
/* If no skb or clone count exhausted then get new one */
|
|
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) {
|
|
pr_err("ERROR: couldn't allocate skb in fill_packet\n");
|
|
schedule();
|
|
pkt_dev->clone_count--; /* back out increment, OOM */
|
|
return;
|
|
}
|
|
pkt_dev->last_pkt_size = pkt_dev->skb->len;
|
|
pkt_dev->clone_count = 0; /* reset counter */
|
|
}
|
|
|
|
if (pkt_dev->delay && pkt_dev->last_ok)
|
|
spin(pkt_dev, pkt_dev->next_tx);
|
|
|
|
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
|
|
skb = pkt_dev->skb;
|
|
skb->protocol = eth_type_trans(skb, skb->dev);
|
|
refcount_add(burst, &skb->users);
|
|
local_bh_disable();
|
|
do {
|
|
ret = netif_receive_skb(skb);
|
|
if (ret == NET_RX_DROP)
|
|
pkt_dev->errors++;
|
|
pkt_dev->sofar++;
|
|
pkt_dev->seq_num++;
|
|
if (refcount_read(&skb->users) != burst) {
|
|
/* skb was queued by rps/rfs or taps,
|
|
* so cannot reuse this skb
|
|
*/
|
|
WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
|
|
/* get out of the loop and wait
|
|
* until skb is consumed
|
|
*/
|
|
break;
|
|
}
|
|
/* skb was 'freed' by stack, so clean few
|
|
* bits and reuse it
|
|
*/
|
|
skb_reset_tc(skb);
|
|
} while (--burst > 0);
|
|
goto out; /* Skips xmit_mode M_START_XMIT */
|
|
} else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
|
|
local_bh_disable();
|
|
refcount_inc(&pkt_dev->skb->users);
|
|
|
|
ret = dev_queue_xmit(pkt_dev->skb);
|
|
switch (ret) {
|
|
case NET_XMIT_SUCCESS:
|
|
pkt_dev->sofar++;
|
|
pkt_dev->seq_num++;
|
|
pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
|
|
break;
|
|
case NET_XMIT_DROP:
|
|
case NET_XMIT_CN:
|
|
/* These are all valid return codes for a qdisc but
|
|
* indicate packets are being dropped or will likely
|
|
* be dropped soon.
|
|
*/
|
|
case NETDEV_TX_BUSY:
|
|
/* qdisc may call dev_hard_start_xmit directly in cases
|
|
* where no queues exist e.g. loopback device, virtual
|
|
* devices, etc. In this case we need to handle
|
|
* NETDEV_TX_ codes.
|
|
*/
|
|
default:
|
|
pkt_dev->errors++;
|
|
net_info_ratelimited("%s xmit error: %d\n",
|
|
pkt_dev->odevname, ret);
|
|
break;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
txq = skb_get_tx_queue(odev, pkt_dev->skb);
|
|
|
|
local_bh_disable();
|
|
|
|
HARD_TX_LOCK(odev, txq, smp_processor_id());
|
|
|
|
if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
|
|
ret = NETDEV_TX_BUSY;
|
|
pkt_dev->last_ok = 0;
|
|
goto unlock;
|
|
}
|
|
refcount_add(burst, &pkt_dev->skb->users);
|
|
|
|
xmit_more:
|
|
ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
|
|
|
|
switch (ret) {
|
|
case NETDEV_TX_OK:
|
|
pkt_dev->last_ok = 1;
|
|
pkt_dev->sofar++;
|
|
pkt_dev->seq_num++;
|
|
pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
|
|
if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
|
|
goto xmit_more;
|
|
break;
|
|
case NET_XMIT_DROP:
|
|
case NET_XMIT_CN:
|
|
/* skb has been consumed */
|
|
pkt_dev->errors++;
|
|
break;
|
|
default: /* Drivers are not supposed to return other values! */
|
|
net_info_ratelimited("%s xmit error: %d\n",
|
|
pkt_dev->odevname, ret);
|
|
pkt_dev->errors++;
|
|
/* fall through */
|
|
case NETDEV_TX_BUSY:
|
|
/* Retry it next time */
|
|
refcount_dec(&(pkt_dev->skb->users));
|
|
pkt_dev->last_ok = 0;
|
|
}
|
|
if (unlikely(burst))
|
|
WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
|
|
unlock:
|
|
HARD_TX_UNLOCK(odev, txq);
|
|
|
|
out:
|
|
local_bh_enable();
|
|
|
|
/* If pkt_dev->count is zero, then run forever */
|
|
if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
|
|
pktgen_wait_for_skb(pkt_dev);
|
|
|
|
/* Done with this */
|
|
pktgen_stop_device(pkt_dev);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Main loop of the thread goes here
|
|
*/
|
|
|
|
static int pktgen_thread_worker(void *arg)
|
|
{
|
|
DEFINE_WAIT(wait);
|
|
struct pktgen_thread *t = arg;
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
int cpu = t->cpu;
|
|
|
|
BUG_ON(smp_processor_id() != cpu);
|
|
|
|
init_waitqueue_head(&t->queue);
|
|
complete(&t->start_done);
|
|
|
|
pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
|
|
|
|
set_freezable();
|
|
|
|
while (!kthread_should_stop()) {
|
|
pkt_dev = next_to_run(t);
|
|
|
|
if (unlikely(!pkt_dev && t->control == 0)) {
|
|
if (t->net->pktgen_exiting)
|
|
break;
|
|
wait_event_interruptible_timeout(t->queue,
|
|
t->control != 0,
|
|
HZ/10);
|
|
try_to_freeze();
|
|
continue;
|
|
}
|
|
|
|
if (likely(pkt_dev)) {
|
|
pktgen_xmit(pkt_dev);
|
|
|
|
if (need_resched())
|
|
pktgen_resched(pkt_dev);
|
|
else
|
|
cpu_relax();
|
|
}
|
|
|
|
if (t->control & T_STOP) {
|
|
pktgen_stop(t);
|
|
t->control &= ~(T_STOP);
|
|
}
|
|
|
|
if (t->control & T_RUN) {
|
|
pktgen_run(t);
|
|
t->control &= ~(T_RUN);
|
|
}
|
|
|
|
if (t->control & T_REMDEVALL) {
|
|
pktgen_rem_all_ifs(t);
|
|
t->control &= ~(T_REMDEVALL);
|
|
}
|
|
|
|
if (t->control & T_REMDEV) {
|
|
pktgen_rem_one_if(t);
|
|
t->control &= ~(T_REMDEV);
|
|
}
|
|
|
|
try_to_freeze();
|
|
}
|
|
|
|
pr_debug("%s stopping all device\n", t->tsk->comm);
|
|
pktgen_stop(t);
|
|
|
|
pr_debug("%s removing all device\n", t->tsk->comm);
|
|
pktgen_rem_all_ifs(t);
|
|
|
|
pr_debug("%s removing thread\n", t->tsk->comm);
|
|
pktgen_rem_thread(t);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
|
|
const char *ifname, bool exact)
|
|
{
|
|
struct pktgen_dev *p, *pkt_dev = NULL;
|
|
size_t len = strlen(ifname);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(p, &t->if_list, list)
|
|
if (strncmp(p->odevname, ifname, len) == 0) {
|
|
if (p->odevname[len]) {
|
|
if (exact || p->odevname[len] != '@')
|
|
continue;
|
|
}
|
|
pkt_dev = p;
|
|
break;
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
|
|
return pkt_dev;
|
|
}
|
|
|
|
/*
|
|
* Adds a dev at front of if_list.
|
|
*/
|
|
|
|
static int add_dev_to_thread(struct pktgen_thread *t,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
int rv = 0;
|
|
|
|
/* This function cannot be called concurrently, as its called
|
|
* under pktgen_thread_lock mutex, but it can run from
|
|
* userspace on another CPU than the kthread. The if_lock()
|
|
* is used here to sync with concurrent instances of
|
|
* _rem_dev_from_if_list() invoked via kthread, which is also
|
|
* updating the if_list */
|
|
if_lock(t);
|
|
|
|
if (pkt_dev->pg_thread) {
|
|
pr_err("ERROR: already assigned to a thread\n");
|
|
rv = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
pkt_dev->running = 0;
|
|
pkt_dev->pg_thread = t;
|
|
list_add_rcu(&pkt_dev->list, &t->if_list);
|
|
|
|
out:
|
|
if_unlock(t);
|
|
return rv;
|
|
}
|
|
|
|
/* Called under thread lock */
|
|
|
|
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
|
|
{
|
|
struct pktgen_dev *pkt_dev;
|
|
int err;
|
|
int node = cpu_to_node(t->cpu);
|
|
|
|
/* We don't allow a device to be on several threads */
|
|
|
|
pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
|
|
if (pkt_dev) {
|
|
pr_err("ERROR: interface already used\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
|
|
if (!pkt_dev)
|
|
return -ENOMEM;
|
|
|
|
strcpy(pkt_dev->odevname, ifname);
|
|
pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
|
|
sizeof(struct flow_state)),
|
|
node);
|
|
if (pkt_dev->flows == NULL) {
|
|
kfree(pkt_dev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pkt_dev->removal_mark = 0;
|
|
pkt_dev->nfrags = 0;
|
|
pkt_dev->delay = pg_delay_d;
|
|
pkt_dev->count = pg_count_d;
|
|
pkt_dev->sofar = 0;
|
|
pkt_dev->udp_src_min = 9; /* sink port */
|
|
pkt_dev->udp_src_max = 9;
|
|
pkt_dev->udp_dst_min = 9;
|
|
pkt_dev->udp_dst_max = 9;
|
|
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;
|
|
pkt_dev->burst = 1;
|
|
pkt_dev->node = -1;
|
|
|
|
err = pktgen_setup_dev(t->net, pkt_dev, ifname);
|
|
if (err)
|
|
goto out1;
|
|
if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
|
|
pkt_dev->clone_skb = pg_clone_skb_d;
|
|
|
|
pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
|
|
&pktgen_if_fops, pkt_dev);
|
|
if (!pkt_dev->entry) {
|
|
pr_err("cannot create %s/%s procfs entry\n",
|
|
PG_PROC_DIR, ifname);
|
|
err = -EINVAL;
|
|
goto out2;
|
|
}
|
|
#ifdef CONFIG_XFRM
|
|
pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
|
|
pkt_dev->ipsproto = IPPROTO_ESP;
|
|
|
|
/* 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->xdst.u.dst.dev = pkt_dev->odev;
|
|
dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
|
|
pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
|
|
pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
|
|
#endif
|
|
|
|
return add_dev_to_thread(t, pkt_dev);
|
|
out2:
|
|
dev_put(pkt_dev->odev);
|
|
out1:
|
|
#ifdef CONFIG_XFRM
|
|
free_SAs(pkt_dev);
|
|
#endif
|
|
vfree(pkt_dev->flows);
|
|
kfree(pkt_dev);
|
|
return err;
|
|
}
|
|
|
|
static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
|
|
{
|
|
struct pktgen_thread *t;
|
|
struct proc_dir_entry *pe;
|
|
struct task_struct *p;
|
|
|
|
t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
|
|
cpu_to_node(cpu));
|
|
if (!t) {
|
|
pr_err("ERROR: out of memory, can't create new thread\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mutex_init(&t->if_lock);
|
|
t->cpu = cpu;
|
|
|
|
INIT_LIST_HEAD(&t->if_list);
|
|
|
|
list_add_tail(&t->th_list, &pn->pktgen_threads);
|
|
init_completion(&t->start_done);
|
|
|
|
p = kthread_create_on_node(pktgen_thread_worker,
|
|
t,
|
|
cpu_to_node(cpu),
|
|
"kpktgend_%d", cpu);
|
|
if (IS_ERR(p)) {
|
|
pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
|
|
list_del(&t->th_list);
|
|
kfree(t);
|
|
return PTR_ERR(p);
|
|
}
|
|
kthread_bind(p, cpu);
|
|
t->tsk = p;
|
|
|
|
pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
|
|
&pktgen_thread_fops, t);
|
|
if (!pe) {
|
|
pr_err("cannot create %s/%s procfs entry\n",
|
|
PG_PROC_DIR, t->tsk->comm);
|
|
kthread_stop(p);
|
|
list_del(&t->th_list);
|
|
kfree(t);
|
|
return -EINVAL;
|
|
}
|
|
|
|
t->net = pn;
|
|
get_task_struct(p);
|
|
wake_up_process(p);
|
|
wait_for_completion(&t->start_done);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Removes a device from the thread if_list.
|
|
*/
|
|
static void _rem_dev_from_if_list(struct pktgen_thread *t,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
struct list_head *q, *n;
|
|
struct pktgen_dev *p;
|
|
|
|
if_lock(t);
|
|
list_for_each_safe(q, n, &t->if_list) {
|
|
p = list_entry(q, struct pktgen_dev, list);
|
|
if (p == pkt_dev)
|
|
list_del_rcu(&p->list);
|
|
}
|
|
if_unlock(t);
|
|
}
|
|
|
|
static int pktgen_remove_device(struct pktgen_thread *t,
|
|
struct pktgen_dev *pkt_dev)
|
|
{
|
|
pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
|
|
|
|
if (pkt_dev->running) {
|
|
pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
|
|
pktgen_stop_device(pkt_dev);
|
|
}
|
|
|
|
/* Dis-associate from the interface */
|
|
|
|
if (pkt_dev->odev) {
|
|
dev_put(pkt_dev->odev);
|
|
pkt_dev->odev = NULL;
|
|
}
|
|
|
|
/* Remove proc before if_list entry, because add_device uses
|
|
* list to determine if interface already exist, avoid race
|
|
* with proc_create_data() */
|
|
proc_remove(pkt_dev->entry);
|
|
|
|
/* And update the thread if_list */
|
|
_rem_dev_from_if_list(t, pkt_dev);
|
|
|
|
#ifdef CONFIG_XFRM
|
|
free_SAs(pkt_dev);
|
|
#endif
|
|
vfree(pkt_dev->flows);
|
|
if (pkt_dev->page)
|
|
put_page(pkt_dev->page);
|
|
kfree_rcu(pkt_dev, rcu);
|
|
return 0;
|
|
}
|
|
|
|
static int __net_init pg_net_init(struct net *net)
|
|
{
|
|
struct pktgen_net *pn = net_generic(net, pg_net_id);
|
|
struct proc_dir_entry *pe;
|
|
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);
|
|
return -ENODEV;
|
|
}
|
|
pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
|
|
if (pe == NULL) {
|
|
pr_err("cannot create %s procfs entry\n", PGCTRL);
|
|
ret = -EINVAL;
|
|
goto remove;
|
|
}
|
|
|
|
for_each_online_cpu(cpu) {
|
|
int err;
|
|
|
|
err = pktgen_create_thread(cpu, pn);
|
|
if (err)
|
|
pr_warn("Cannot create thread for cpu %d (%d)\n",
|
|
cpu, err);
|
|
}
|
|
|
|
if (list_empty(&pn->pktgen_threads)) {
|
|
pr_err("Initialization failed for all threads\n");
|
|
ret = -ENODEV;
|
|
goto remove_entry;
|
|
}
|
|
|
|
return 0;
|
|
|
|
remove_entry:
|
|
remove_proc_entry(PGCTRL, pn->proc_dir);
|
|
remove:
|
|
remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
|
|
return ret;
|
|
}
|
|
|
|
static void __net_exit pg_net_exit(struct net *net)
|
|
{
|
|
struct pktgen_net *pn = net_generic(net, pg_net_id);
|
|
struct pktgen_thread *t;
|
|
struct list_head *q, *n;
|
|
LIST_HEAD(list);
|
|
|
|
/* Stop all interfaces & threads */
|
|
pn->pktgen_exiting = true;
|
|
|
|
mutex_lock(&pktgen_thread_lock);
|
|
list_splice_init(&pn->pktgen_threads, &list);
|
|
mutex_unlock(&pktgen_thread_lock);
|
|
|
|
list_for_each_safe(q, n, &list) {
|
|
t = list_entry(q, struct pktgen_thread, th_list);
|
|
list_del(&t->th_list);
|
|
kthread_stop(t->tsk);
|
|
put_task_struct(t->tsk);
|
|
kfree(t);
|
|
}
|
|
|
|
remove_proc_entry(PGCTRL, pn->proc_dir);
|
|
remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
|
|
}
|
|
|
|
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;
|
|
|
|
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);
|
|
/* Don't need rcu_barrier() due to use of kfree_rcu() */
|
|
}
|
|
|
|
module_init(pg_init);
|
|
module_exit(pg_cleanup);
|
|
|
|
MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
|
|
MODULE_DESCRIPTION("Packet Generator tool");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(VERSION);
|
|
module_param(pg_count_d, int, 0);
|
|
MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
|
|
module_param(pg_delay_d, int, 0);
|
|
MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
|
|
module_param(pg_clone_skb_d, int, 0);
|
|
MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
|
|
module_param(debug, int, 0);
|
|
MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
|