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![David S. Miller](/assets/img/avatar_default.png)
Don't assume 16. Found by Ben Greear. Signed-off-by: David S. Miller <davem@davemloft.net>
3054 lines
82 KiB
C
3054 lines
82 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. The if_lock should be possible to remove when add/rem_device is merged
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* into this too.
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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 waring
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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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#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/smp_lock.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/delay.h>
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#include <linux/timer.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/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 <net/checksum.h>
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#include <net/ipv6.h>
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#include <net/addrconf.h>
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#include <asm/byteorder.h>
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#include <linux/rcupdate.h>
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#include <asm/bitops.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/uaccess.h>
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#include <asm/div64.h> /* do_div */
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#include <asm/timex.h>
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#define VERSION "pktgen v2.63: Packet Generator for packet performance testing.\n"
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/* #define PG_DEBUG(a) a */
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#define PG_DEBUG(a)
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/* The buckets are exponential in 'width' */
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#define LAT_BUCKETS_MAX 32
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#define IP_NAME_SZ 32
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/* Device flag bits */
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#define F_IPSRC_RND (1<<0) /* IP-Src Random */
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#define F_IPDST_RND (1<<1) /* IP-Dst Random */
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#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
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#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
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#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
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#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
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#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
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#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
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/* Thread control flag bits */
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#define T_TERMINATE (1<<0)
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#define T_STOP (1<<1) /* Stop run */
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#define T_RUN (1<<2) /* Start run */
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#define T_REMDEV (1<<3) /* Remove all devs */
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/* Locks */
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#define thread_lock() down(&pktgen_sem)
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#define thread_unlock() up(&pktgen_sem)
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/* If lock -- can be removed after some work */
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#define if_lock(t) spin_lock(&(t->if_lock));
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#define if_unlock(t) spin_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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static struct proc_dir_entry *pg_proc_dir = NULL;
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#define MAX_CFLOWS 65536
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struct flow_state
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{
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__u32 cur_daddr;
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int count;
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};
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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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char ifname[IFNAMSIZ];
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char result[512];
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struct pktgen_thread* pg_thread; /* the owner */
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struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */
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int running; /* if this changes to 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 min_pkt_size; /* = ETH_ZLEN; */
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int max_pkt_size; /* = ETH_ZLEN; */
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int nfrags;
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__u32 delay_us; /* Default delay */
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__u32 delay_ns;
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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, pkts will be re-sent */
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/* runtime counters relating to clone_skb */
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__u64 next_tx_us; /* timestamp of when to tx next */
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__u32 next_tx_ns;
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__u64 allocated_skbs;
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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? This will keep
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* sequence numbers in order, for example.
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*/
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__u64 started_at; /* micro-seconds */
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__u64 stopped_at; /* micro-seconds */
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__u64 idle_acc; /* micro-seconds */
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__u32 seq_num;
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int clone_skb; /* Use multiple SKBs during packet gen. If this number
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* is greater than 1, then that many copies of the same
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* packet will be sent before a new packet is allocated.
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* For instance, if you want to send 1024 identical packets
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* before creating a new packet, 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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__u32 saddr_min; /* inclusive, source IP address */
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__u32 saddr_max; /* exclusive, source IP address */
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__u32 daddr_min; /* inclusive, dest IP address */
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__u32 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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__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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__u32 cur_saddr;
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__u32 cur_daddr;
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__u16 cur_udp_dst;
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__u16 cur_udp_src;
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__u32 cur_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, mainly 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. Note that the device should
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* have it's pg_info pointer pointing back to this
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* device. This will be set when the user specifies
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* the out-going 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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struct flow_state *flows;
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unsigned cflows; /* Concurrent flows (config) */
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unsigned lflow; /* Flow length (config) */
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unsigned nflows; /* accumulated flows (stats) */
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};
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struct pktgen_hdr {
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__u32 pgh_magic;
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__u32 seq_num;
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__u32 tv_sec;
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__u32 tv_usec;
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};
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struct pktgen_thread {
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spinlock_t if_lock;
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struct pktgen_dev *if_list; /* All device here */
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struct pktgen_thread* next;
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char name[32];
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char result[512];
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u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
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/* Field for thread to receive "posted" events terminate, stop ifs etc.*/
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u32 control;
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int pid;
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int cpu;
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wait_queue_head_t queue;
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};
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#define REMOVE 1
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#define FIND 0
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/* This code works around the fact that do_div cannot handle two 64-bit
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numbers, and regular 64-bit division doesn't work on x86 kernels.
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--Ben
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*/
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#define PG_DIV 0
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/* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
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* Function copied/adapted/optimized from:
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*
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* nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
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*
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* Copyright 1994, University of Cambridge Computer Laboratory
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* All Rights Reserved.
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*
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*/
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static inline s64 divremdi3(s64 x, s64 y, int type)
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{
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u64 a = (x < 0) ? -x : x;
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u64 b = (y < 0) ? -y : y;
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u64 res = 0, d = 1;
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if (b > 0) {
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while (b < a) {
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b <<= 1;
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d <<= 1;
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}
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}
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do {
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if ( a >= b ) {
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a -= b;
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res += d;
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}
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b >>= 1;
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d >>= 1;
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}
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while (d);
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if (PG_DIV == type) {
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return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res;
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}
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else {
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return ((x & (1ll<<63)) == 0) ? a : -(s64)a;
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}
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}
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/* End of hacks to deal with 64-bit math on x86 */
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/** Convert to milliseconds */
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static inline __u64 tv_to_ms(const struct timeval* tv)
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{
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__u64 ms = tv->tv_usec / 1000;
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ms += (__u64)tv->tv_sec * (__u64)1000;
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return ms;
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}
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/** Convert to micro-seconds */
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static inline __u64 tv_to_us(const struct timeval* tv)
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{
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__u64 us = tv->tv_usec;
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us += (__u64)tv->tv_sec * (__u64)1000000;
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return us;
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}
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static inline __u64 pg_div(__u64 n, __u32 base) {
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__u64 tmp = n;
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do_div(tmp, base);
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/* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
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n, base, tmp); */
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return tmp;
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}
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static inline __u64 pg_div64(__u64 n, __u64 base)
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{
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__u64 tmp = n;
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/*
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* How do we know if the architecture we are running on
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* supports division with 64 bit base?
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*
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*/
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#if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
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do_div(tmp, base);
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#else
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tmp = divremdi3(n, base, PG_DIV);
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#endif
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return tmp;
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}
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static inline u32 pktgen_random(void)
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{
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#if 0
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__u32 n;
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get_random_bytes(&n, 4);
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return n;
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#else
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return net_random();
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#endif
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}
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static inline __u64 getCurMs(void)
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{
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struct timeval tv;
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do_gettimeofday(&tv);
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return tv_to_ms(&tv);
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}
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static inline __u64 getCurUs(void)
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{
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struct timeval tv;
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do_gettimeofday(&tv);
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return tv_to_us(&tv);
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}
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static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
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{
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return tv_to_us(a) - tv_to_us(b);
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}
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/* old include end */
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static char version[] __initdata = VERSION;
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static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i);
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static int pktgen_add_device(struct pktgen_thread* t, const char* ifname);
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static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname);
|
|
static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
|
|
static void pktgen_run_all_threads(void);
|
|
static void pktgen_stop_all_threads_ifs(void);
|
|
static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
|
|
static void pktgen_stop(struct pktgen_thread* t);
|
|
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
|
|
static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove);
|
|
static unsigned int scan_ip6(const char *s,char ip[16]);
|
|
static unsigned int fmt_ip6(char *s,const char ip[16]);
|
|
|
|
/* Module parameters, defaults. */
|
|
static int pg_count_d = 1000; /* 1000 pkts by default */
|
|
static int pg_delay_d;
|
|
static int pg_clone_skb_d;
|
|
static int debug;
|
|
|
|
static DECLARE_MUTEX(pktgen_sem);
|
|
static struct pktgen_thread *pktgen_threads = NULL;
|
|
|
|
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)
|
|
{
|
|
int err = 0;
|
|
char data[128];
|
|
|
|
if (!capable(CAP_NET_ADMIN)){
|
|
err = -EPERM;
|
|
goto out;
|
|
}
|
|
|
|
if (count > sizeof(data))
|
|
count = sizeof(data);
|
|
|
|
if (copy_from_user(data, buf, count)) {
|
|
err = -EFAULT;
|
|
goto out;
|
|
}
|
|
data[count-1] = 0; /* Make string */
|
|
|
|
if (!strcmp(data, "stop"))
|
|
pktgen_stop_all_threads_ifs();
|
|
|
|
else if (!strcmp(data, "start"))
|
|
pktgen_run_all_threads();
|
|
|
|
else
|
|
printk("pktgen: Unknown command: %s\n", data);
|
|
|
|
err = count;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int pgctrl_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, pgctrl_show, PDE(inode)->data);
|
|
}
|
|
|
|
static struct file_operations pktgen_fops = {
|
|
.owner = THIS_MODULE,
|
|
.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)
|
|
{
|
|
int i;
|
|
struct pktgen_dev *pkt_dev = seq->private;
|
|
__u64 sa;
|
|
__u64 stopped;
|
|
__u64 now = getCurUs();
|
|
|
|
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: %u clone_skb: %d ifname: %s\n",
|
|
pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
|
|
|
|
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
|
|
|
|
|
|
if(pkt_dev->flags & F_IPV6) {
|
|
char b1[128], b2[128], b3[128];
|
|
fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
|
|
fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
|
|
fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
|
|
seq_printf(seq, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
|
|
|
|
fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
|
|
fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
|
|
fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
|
|
seq_printf(seq, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
|
|
|
|
}
|
|
else
|
|
seq_printf(seq," dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
|
|
pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
|
|
|
|
seq_puts(seq, " src_mac: ");
|
|
|
|
if (is_zero_ether_addr(pkt_dev->src_mac))
|
|
for (i = 0; i < 6; i++)
|
|
seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
|
|
else
|
|
for (i = 0; i < 6; i++)
|
|
seq_printf(seq, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":");
|
|
|
|
seq_printf(seq, "dst_mac: ");
|
|
for (i = 0; i < 6; i++)
|
|
seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":");
|
|
|
|
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 Flags: ",
|
|
pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
|
|
|
|
|
|
if (pkt_dev->flags & F_IPV6)
|
|
seq_printf(seq, "IPV6 ");
|
|
|
|
if (pkt_dev->flags & F_IPSRC_RND)
|
|
seq_printf(seq, "IPSRC_RND ");
|
|
|
|
if (pkt_dev->flags & F_IPDST_RND)
|
|
seq_printf(seq, "IPDST_RND ");
|
|
|
|
if (pkt_dev->flags & F_TXSIZE_RND)
|
|
seq_printf(seq, "TXSIZE_RND ");
|
|
|
|
if (pkt_dev->flags & F_UDPSRC_RND)
|
|
seq_printf(seq, "UDPSRC_RND ");
|
|
|
|
if (pkt_dev->flags & F_UDPDST_RND)
|
|
seq_printf(seq, "UDPDST_RND ");
|
|
|
|
if (pkt_dev->flags & F_MACSRC_RND)
|
|
seq_printf(seq, "MACSRC_RND ");
|
|
|
|
if (pkt_dev->flags & F_MACDST_RND)
|
|
seq_printf(seq, "MACDST_RND ");
|
|
|
|
|
|
seq_puts(seq, "\n");
|
|
|
|
sa = pkt_dev->started_at;
|
|
stopped = pkt_dev->stopped_at;
|
|
if (pkt_dev->running)
|
|
stopped = now; /* not really stopped, more like last-running-at */
|
|
|
|
seq_printf(seq, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
|
|
(unsigned long long) pkt_dev->sofar,
|
|
(unsigned long long) pkt_dev->errors,
|
|
(unsigned long long) sa,
|
|
(unsigned long long) stopped,
|
|
(unsigned long long) pkt_dev->idle_acc);
|
|
|
|
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) {
|
|
char b1[128], b2[128];
|
|
fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
|
|
fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
|
|
seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
|
|
}
|
|
else
|
|
seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\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, " flows: %u\n", pkt_dev->nflows);
|
|
|
|
if (pkt_dev->result[0])
|
|
seq_printf(seq, "Result: %s\n", pkt_dev->result);
|
|
else
|
|
seq_printf(seq, "Result: Idle\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
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 unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
|
|
unsigned long *num)
|
|
{
|
|
int i = 0;
|
|
*num = 0;
|
|
|
|
for(; 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 = 0;
|
|
|
|
for(; 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;
|
|
break;
|
|
default:
|
|
break;
|
|
};
|
|
}
|
|
done_str:
|
|
|
|
return i;
|
|
}
|
|
|
|
static ssize_t pktgen_if_write(struct file *file, const char __user *user_buffer,
|
|
size_t count, loff_t *offset)
|
|
{
|
|
struct seq_file *seq = (struct seq_file *) file->private_data;
|
|
struct pktgen_dev *pkt_dev = seq->private;
|
|
int i = 0, 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) {
|
|
printk("pktgen: wrong command format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
max = count - i;
|
|
tmp = count_trail_chars(&user_buffer[i], max);
|
|
if (tmp < 0) {
|
|
printk("pktgen: 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) {
|
|
char tb[count + 1];
|
|
if (copy_from_user(tb, user_buffer, count))
|
|
return -EFAULT;
|
|
tb[count] = 0;
|
|
printk("pktgen: %s,%lu buffer -:%s:-\n", name,
|
|
(unsigned long) count, tb);
|
|
}
|
|
|
|
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_us = 0x7FFFFFFF;
|
|
pkt_dev->delay_ns = 0;
|
|
} else {
|
|
pkt_dev->delay_us = value / 1000;
|
|
pkt_dev->delay_ns = value % 1000;
|
|
}
|
|
sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns);
|
|
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; }
|
|
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, "flag")) {
|
|
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, "IPSRC_RND") == 0)
|
|
pkt_dev->flags |= F_IPSRC_RND;
|
|
|
|
else if (strcmp(f, "!IPSRC_RND") == 0)
|
|
pkt_dev->flags &= ~F_IPSRC_RND;
|
|
|
|
else if (strcmp(f, "TXSIZE_RND") == 0)
|
|
pkt_dev->flags |= F_TXSIZE_RND;
|
|
|
|
else if (strcmp(f, "!TXSIZE_RND") == 0)
|
|
pkt_dev->flags &= ~F_TXSIZE_RND;
|
|
|
|
else if (strcmp(f, "IPDST_RND") == 0)
|
|
pkt_dev->flags |= F_IPDST_RND;
|
|
|
|
else if (strcmp(f, "!IPDST_RND") == 0)
|
|
pkt_dev->flags &= ~F_IPDST_RND;
|
|
|
|
else if (strcmp(f, "UDPSRC_RND") == 0)
|
|
pkt_dev->flags |= F_UDPSRC_RND;
|
|
|
|
else if (strcmp(f, "!UDPSRC_RND") == 0)
|
|
pkt_dev->flags &= ~F_UDPSRC_RND;
|
|
|
|
else if (strcmp(f, "UDPDST_RND") == 0)
|
|
pkt_dev->flags |= F_UDPDST_RND;
|
|
|
|
else if (strcmp(f, "!UDPDST_RND") == 0)
|
|
pkt_dev->flags &= ~F_UDPDST_RND;
|
|
|
|
else if (strcmp(f, "MACSRC_RND") == 0)
|
|
pkt_dev->flags |= F_MACSRC_RND;
|
|
|
|
else if (strcmp(f, "!MACSRC_RND") == 0)
|
|
pkt_dev->flags &= ~F_MACSRC_RND;
|
|
|
|
else if (strcmp(f, "MACDST_RND") == 0)
|
|
pkt_dev->flags |= F_MACDST_RND;
|
|
|
|
else if (strcmp(f, "!MACDST_RND") == 0)
|
|
pkt_dev->flags &= ~F_MACDST_RND;
|
|
|
|
else {
|
|
sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
|
|
f,
|
|
"IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\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));
|
|
strncpy(pkt_dev->dst_min, buf, len);
|
|
pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
|
|
pkt_dev->cur_daddr = pkt_dev->daddr_min;
|
|
}
|
|
if(debug)
|
|
printk("pktgen: 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));
|
|
strncpy(pkt_dev->dst_max, buf, len);
|
|
pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
|
|
pkt_dev->cur_daddr = pkt_dev->daddr_max;
|
|
}
|
|
if(debug)
|
|
printk("pktgen: 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;
|
|
|
|
scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
|
|
fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
|
|
|
|
ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
|
|
|
|
if(debug)
|
|
printk("pktgen: 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;
|
|
|
|
scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
|
|
fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
|
|
|
|
ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr);
|
|
if(debug)
|
|
printk("pktgen: 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;
|
|
|
|
scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
|
|
fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
|
|
|
|
if(debug)
|
|
printk("pktgen: 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;
|
|
|
|
scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
|
|
fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
|
|
|
|
ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
|
|
|
|
if(debug)
|
|
printk("pktgen: 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));
|
|
strncpy(pkt_dev->src_min, buf, len);
|
|
pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
|
|
pkt_dev->cur_saddr = pkt_dev->saddr_min;
|
|
}
|
|
if(debug)
|
|
printk("pktgen: 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));
|
|
strncpy(pkt_dev->src_max, buf, len);
|
|
pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
|
|
pkt_dev->cur_saddr = pkt_dev->saddr_max;
|
|
}
|
|
if(debug)
|
|
printk("pktgen: 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")) {
|
|
char *v = valstr;
|
|
unsigned char old_dmac[ETH_ALEN];
|
|
unsigned char *m = pkt_dev->dst_mac;
|
|
memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
|
|
|
|
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;
|
|
i += len;
|
|
|
|
for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) {
|
|
if (*v >= '0' && *v <= '9') {
|
|
*m *= 16;
|
|
*m += *v - '0';
|
|
}
|
|
if (*v >= 'A' && *v <= 'F') {
|
|
*m *= 16;
|
|
*m += *v - 'A' + 10;
|
|
}
|
|
if (*v >= 'a' && *v <= 'f') {
|
|
*m *= 16;
|
|
*m += *v - 'a' + 10;
|
|
}
|
|
if (*v == ':') {
|
|
m++;
|
|
*m = 0;
|
|
}
|
|
}
|
|
|
|
/* Set up Dest MAC */
|
|
if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
|
|
memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
|
|
|
|
sprintf(pg_result, "OK: dstmac");
|
|
return count;
|
|
}
|
|
if (!strcmp(name, "src_mac")) {
|
|
char *v = valstr;
|
|
unsigned char *m = pkt_dev->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;
|
|
i += len;
|
|
|
|
for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) {
|
|
if (*v >= '0' && *v <= '9') {
|
|
*m *= 16;
|
|
*m += *v - '0';
|
|
}
|
|
if (*v >= 'A' && *v <= 'F') {
|
|
*m *= 16;
|
|
*m += *v - 'A' + 10;
|
|
}
|
|
if (*v >= 'a' && *v <= 'f') {
|
|
*m *= 16;
|
|
*m += *v - 'a' + 10;
|
|
}
|
|
if (*v == ':') {
|
|
m++;
|
|
*m = 0;
|
|
}
|
|
}
|
|
|
|
sprintf(pg_result, "OK: srcmac");
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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(inode)->data);
|
|
}
|
|
|
|
static struct file_operations pktgen_if_fops = {
|
|
.owner = THIS_MODULE,
|
|
.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;
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
|
|
BUG_ON(!t);
|
|
|
|
seq_printf(seq, "Name: %s max_before_softirq: %d\n",
|
|
t->name, t->max_before_softirq);
|
|
|
|
seq_printf(seq, "Running: ");
|
|
|
|
if_lock(t);
|
|
for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
|
|
if(pkt_dev->running)
|
|
seq_printf(seq, "%s ", pkt_dev->ifname);
|
|
|
|
seq_printf(seq, "\nStopped: ");
|
|
|
|
for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
|
|
if(!pkt_dev->running)
|
|
seq_printf(seq, "%s ", pkt_dev->ifname);
|
|
|
|
if (t->result[0])
|
|
seq_printf(seq, "\nResult: %s\n", t->result);
|
|
else
|
|
seq_printf(seq, "\nResult: NA\n");
|
|
|
|
if_unlock(t);
|
|
|
|
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 = (struct seq_file *) file->private_data;
|
|
struct pktgen_thread *t = seq->private;
|
|
int i = 0, max, len, ret;
|
|
char name[40];
|
|
char *pg_result;
|
|
unsigned long value = 0;
|
|
|
|
if (count < 1) {
|
|
// sprintf(pg_result, "Wrong command format");
|
|
return -EINVAL;
|
|
}
|
|
|
|
max = count - i;
|
|
len = count_trail_chars(&user_buffer[i], 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)
|
|
printk("pktgen: t=%s, count=%lu\n", name,
|
|
(unsigned long) count);
|
|
|
|
if(!t) {
|
|
printk("pktgen: 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;
|
|
thread_lock();
|
|
pktgen_add_device(t, f);
|
|
thread_unlock();
|
|
ret = count;
|
|
sprintf(pg_result, "OK: add_device=%s", f);
|
|
goto out;
|
|
}
|
|
|
|
if (!strcmp(name, "rem_device_all")) {
|
|
thread_lock();
|
|
t->control |= T_REMDEV;
|
|
thread_unlock();
|
|
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")) {
|
|
len = num_arg(&user_buffer[i], 10, &value);
|
|
thread_lock();
|
|
t->max_before_softirq = value;
|
|
thread_unlock();
|
|
ret = count;
|
|
sprintf(pg_result, "OK: max_before_softirq=%lu", value);
|
|
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(inode)->data);
|
|
}
|
|
|
|
static struct file_operations pktgen_thread_fops = {
|
|
.owner = THIS_MODULE,
|
|
.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 char* ifname, int remove)
|
|
{
|
|
struct pktgen_thread *t;
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
|
|
t = pktgen_threads;
|
|
|
|
while (t) {
|
|
pkt_dev = pktgen_find_dev(t, ifname);
|
|
if (pkt_dev) {
|
|
if(remove) {
|
|
if_lock(t);
|
|
pktgen_remove_device(t, pkt_dev);
|
|
if_unlock(t);
|
|
}
|
|
break;
|
|
}
|
|
t = t->next;
|
|
}
|
|
return pkt_dev;
|
|
}
|
|
|
|
static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove)
|
|
{
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
thread_lock();
|
|
pkt_dev = __pktgen_NN_threads(ifname, remove);
|
|
thread_unlock();
|
|
return pkt_dev;
|
|
}
|
|
|
|
static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = (struct net_device *)(ptr);
|
|
|
|
/* It is OK that we do not hold the group lock right now,
|
|
* as we run under the RTNL lock.
|
|
*/
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGEADDR:
|
|
case NETDEV_GOING_DOWN:
|
|
case NETDEV_DOWN:
|
|
case NETDEV_UP:
|
|
/* Ignore for now */
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
|
pktgen_NN_threads(dev->name, REMOVE);
|
|
break;
|
|
};
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
/* Associate pktgen_dev with a device. */
|
|
|
|
static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) {
|
|
struct net_device *odev;
|
|
|
|
/* Clean old setups */
|
|
|
|
if (pkt_dev->odev) {
|
|
dev_put(pkt_dev->odev);
|
|
pkt_dev->odev = NULL;
|
|
}
|
|
|
|
odev = dev_get_by_name(pkt_dev->ifname);
|
|
|
|
if (!odev) {
|
|
printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
|
|
goto out;
|
|
}
|
|
if (odev->type != ARPHRD_ETHER) {
|
|
printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname);
|
|
goto out_put;
|
|
}
|
|
if (!netif_running(odev)) {
|
|
printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
|
|
goto out_put;
|
|
}
|
|
pkt_dev->odev = odev;
|
|
|
|
return pkt_dev->odev;
|
|
|
|
out_put:
|
|
dev_put(odev);
|
|
out:
|
|
return NULL;
|
|
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
/* Try once more, just in case it works now. */
|
|
if (!pkt_dev->odev)
|
|
pktgen_setup_dev(pkt_dev);
|
|
|
|
if (!pkt_dev->odev) {
|
|
printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
|
|
sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
|
|
return;
|
|
}
|
|
|
|
/* Default to the interface's mac if not explicitly set. */
|
|
|
|
if (is_zero_ether_addr(pkt_dev->src_mac))
|
|
memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
|
|
|
|
/* Set up Dest MAC */
|
|
memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
|
|
|
|
/* Set up pkt size */
|
|
pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
|
|
|
|
if(pkt_dev->flags & F_IPV6) {
|
|
/*
|
|
* Skip this automatic address setting until locks or functions
|
|
* gets exported
|
|
*/
|
|
|
|
#ifdef NOTNOW
|
|
int i, set = 0, err=1;
|
|
struct inet6_dev *idev;
|
|
|
|
for(i=0; i< IN6_ADDR_HSIZE; 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
|
|
*/
|
|
|
|
|
|
read_lock(&addrconf_lock);
|
|
if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
|
|
struct inet6_ifaddr *ifp;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
|
|
if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
|
|
ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr);
|
|
err = 0;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
read_unlock(&addrconf_lock);
|
|
if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n");
|
|
}
|
|
#endif
|
|
}
|
|
else {
|
|
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_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, __u64 spin_until_us)
|
|
{
|
|
__u64 start;
|
|
__u64 now;
|
|
|
|
start = now = getCurUs();
|
|
printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
|
|
while (now < spin_until_us) {
|
|
/* TODO: optimize sleeping behavior */
|
|
if (spin_until_us - now > jiffies_to_usecs(1)+1)
|
|
schedule_timeout_interruptible(1);
|
|
else if (spin_until_us - now > 100) {
|
|
do_softirq();
|
|
if (!pkt_dev->running)
|
|
return;
|
|
if (need_resched())
|
|
schedule();
|
|
}
|
|
|
|
now = getCurUs();
|
|
}
|
|
|
|
pkt_dev->idle_acc += now - start;
|
|
}
|
|
|
|
|
|
/* 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 = pktgen_random() % pkt_dev->cflows;
|
|
|
|
if (pkt_dev->flows[flow].count > pkt_dev->lflow)
|
|
pkt_dev->flows[flow].count = 0;
|
|
}
|
|
|
|
|
|
/* Deal with source MAC */
|
|
if (pkt_dev->src_mac_count > 1) {
|
|
__u32 mc;
|
|
__u32 tmp;
|
|
|
|
if (pkt_dev->flags & F_MACSRC_RND)
|
|
mc = pktgen_random() % (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 = pktgen_random() % (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->udp_src_min < pkt_dev->udp_src_max) {
|
|
if (pkt_dev->flags & F_UDPSRC_RND)
|
|
pkt_dev->cur_udp_src = ((pktgen_random() % (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 = ((pktgen_random() % (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)) {
|
|
|
|
if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) {
|
|
__u32 t;
|
|
if (pkt_dev->flags & F_IPSRC_RND)
|
|
t = ((pktgen_random() % (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 && pkt_dev->flows[flow].count != 0) {
|
|
pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
|
|
} else {
|
|
|
|
if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) {
|
|
__u32 t;
|
|
if (pkt_dev->flags & F_IPDST_RND) {
|
|
|
|
t = ((pktgen_random() % (imx - imn)) + imn);
|
|
t = htonl(t);
|
|
|
|
while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) {
|
|
t = ((pktgen_random() % (imx - imn)) + imn);
|
|
t = htonl(t);
|
|
}
|
|
pkt_dev->cur_daddr = t;
|
|
}
|
|
|
|
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].cur_daddr = pkt_dev->cur_daddr;
|
|
pkt_dev->nflows++;
|
|
}
|
|
}
|
|
}
|
|
else /* IPV6 * */
|
|
{
|
|
if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
|
|
pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
|
|
pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
|
|
pkt_dev->min_in6_daddr.s6_addr32[3] == 0);
|
|
else {
|
|
int i;
|
|
|
|
/* Only random destinations yet */
|
|
|
|
for(i=0; i < 4; i++) {
|
|
pkt_dev->cur_in6_daddr.s6_addr32[i] =
|
|
((pktgen_random() |
|
|
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 = ((pktgen_random() % (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;
|
|
}
|
|
|
|
pkt_dev->flows[flow].count++;
|
|
}
|
|
|
|
|
|
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;
|
|
struct pktgen_hdr *pgh = NULL;
|
|
|
|
/* Update any of the values, used when we're incrementing various
|
|
* fields.
|
|
*/
|
|
mod_cur_headers(pkt_dev);
|
|
|
|
datalen = (odev->hard_header_len + 16) & ~0xf;
|
|
skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen, GFP_ATOMIC);
|
|
if (!skb) {
|
|
sprintf(pkt_dev->result, "No memory");
|
|
return NULL;
|
|
}
|
|
|
|
skb_reserve(skb, datalen);
|
|
|
|
/* Reserve for ethernet and IP header */
|
|
eth = (__u8 *) skb_push(skb, 14);
|
|
iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
|
|
udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
|
|
|
|
memcpy(eth, pkt_dev->hh, 12);
|
|
*(u16*)ð[12] = __constant_htons(ETH_P_IP);
|
|
|
|
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
|
|
if (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; /* No checksum */
|
|
|
|
iph->ihl = 5;
|
|
iph->version = 4;
|
|
iph->ttl = 32;
|
|
iph->tos = 0;
|
|
iph->protocol = IPPROTO_UDP; /* UDP */
|
|
iph->saddr = pkt_dev->cur_saddr;
|
|
iph->daddr = pkt_dev->cur_daddr;
|
|
iph->frag_off = 0;
|
|
iplen = 20 + 8 + datalen;
|
|
iph->tot_len = htons(iplen);
|
|
iph->check = 0;
|
|
iph->check = ip_fast_csum((void *) iph, iph->ihl);
|
|
skb->protocol = __constant_htons(ETH_P_IP);
|
|
skb->mac.raw = ((u8 *)iph) - 14;
|
|
skb->dev = odev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
|
|
if (pkt_dev->nfrags <= 0)
|
|
pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
|
|
else {
|
|
int frags = pkt_dev->nfrags;
|
|
int i;
|
|
|
|
pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
|
|
|
|
if (frags > MAX_SKB_FRAGS)
|
|
frags = MAX_SKB_FRAGS;
|
|
if (datalen > frags*PAGE_SIZE) {
|
|
skb_put(skb, datalen-frags*PAGE_SIZE);
|
|
datalen = frags*PAGE_SIZE;
|
|
}
|
|
|
|
i = 0;
|
|
while (datalen > 0) {
|
|
struct page *page = alloc_pages(GFP_KERNEL, 0);
|
|
skb_shinfo(skb)->frags[i].page = page;
|
|
skb_shinfo(skb)->frags[i].page_offset = 0;
|
|
skb_shinfo(skb)->frags[i].size =
|
|
(datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
|
|
datalen -= skb_shinfo(skb)->frags[i].size;
|
|
skb->len += skb_shinfo(skb)->frags[i].size;
|
|
skb->data_len += skb_shinfo(skb)->frags[i].size;
|
|
i++;
|
|
skb_shinfo(skb)->nr_frags = i;
|
|
}
|
|
|
|
while (i < frags) {
|
|
int rem;
|
|
|
|
if (i == 0)
|
|
break;
|
|
|
|
rem = skb_shinfo(skb)->frags[i - 1].size / 2;
|
|
if (rem == 0)
|
|
break;
|
|
|
|
skb_shinfo(skb)->frags[i - 1].size -= rem;
|
|
|
|
skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
|
|
get_page(skb_shinfo(skb)->frags[i].page);
|
|
skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
|
|
skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
|
|
skb_shinfo(skb)->frags[i].size = rem;
|
|
i++;
|
|
skb_shinfo(skb)->nr_frags = i;
|
|
}
|
|
}
|
|
|
|
/* Stamp the time, and sequence number, convert them to network byte order */
|
|
|
|
if (pgh) {
|
|
struct timeval timestamp;
|
|
|
|
pgh->pgh_magic = htonl(PKTGEN_MAGIC);
|
|
pgh->seq_num = htonl(pkt_dev->seq_num);
|
|
|
|
do_gettimeofday(×tamp);
|
|
pgh->tv_sec = htonl(timestamp.tv_sec);
|
|
pgh->tv_usec = htonl(timestamp.tv_usec);
|
|
}
|
|
pkt_dev->seq_num++;
|
|
|
|
return skb;
|
|
}
|
|
|
|
/*
|
|
* scan_ip6, fmt_ip taken from dietlibc-0.21
|
|
* Author Felix von Leitner <felix-dietlibc@fefe.de>
|
|
*
|
|
* Slightly modified for kernel.
|
|
* Should be candidate for net/ipv4/utils.c
|
|
* --ro
|
|
*/
|
|
|
|
static unsigned int scan_ip6(const char *s,char ip[16])
|
|
{
|
|
unsigned int i;
|
|
unsigned int len=0;
|
|
unsigned long u;
|
|
char suffix[16];
|
|
unsigned int prefixlen=0;
|
|
unsigned int suffixlen=0;
|
|
__u32 tmp;
|
|
|
|
for (i=0; i<16; i++) ip[i]=0;
|
|
|
|
for (;;) {
|
|
if (*s == ':') {
|
|
len++;
|
|
if (s[1] == ':') { /* Found "::", skip to part 2 */
|
|
s+=2;
|
|
len++;
|
|
break;
|
|
}
|
|
s++;
|
|
}
|
|
{
|
|
char *tmp;
|
|
u=simple_strtoul(s,&tmp,16);
|
|
i=tmp-s;
|
|
}
|
|
|
|
if (!i) return 0;
|
|
if (prefixlen==12 && s[i]=='.') {
|
|
|
|
/* the last 4 bytes may be written as IPv4 address */
|
|
|
|
tmp = in_aton(s);
|
|
memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp));
|
|
return i+len;
|
|
}
|
|
ip[prefixlen++] = (u >> 8);
|
|
ip[prefixlen++] = (u & 255);
|
|
s += i; len += i;
|
|
if (prefixlen==16)
|
|
return len;
|
|
}
|
|
|
|
/* part 2, after "::" */
|
|
for (;;) {
|
|
if (*s == ':') {
|
|
if (suffixlen==0)
|
|
break;
|
|
s++;
|
|
len++;
|
|
} else if (suffixlen!=0)
|
|
break;
|
|
{
|
|
char *tmp;
|
|
u=simple_strtol(s,&tmp,16);
|
|
i=tmp-s;
|
|
}
|
|
if (!i) {
|
|
if (*s) len--;
|
|
break;
|
|
}
|
|
if (suffixlen+prefixlen<=12 && s[i]=='.') {
|
|
tmp = in_aton(s);
|
|
memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp));
|
|
suffixlen+=4;
|
|
len+=strlen(s);
|
|
break;
|
|
}
|
|
suffix[suffixlen++] = (u >> 8);
|
|
suffix[suffixlen++] = (u & 255);
|
|
s += i; len += i;
|
|
if (prefixlen+suffixlen==16)
|
|
break;
|
|
}
|
|
for (i=0; i<suffixlen; i++)
|
|
ip[16-suffixlen+i] = suffix[i];
|
|
return len;
|
|
}
|
|
|
|
static char tohex(char hexdigit) {
|
|
return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
|
|
}
|
|
|
|
static int fmt_xlong(char* s,unsigned int i) {
|
|
char* bak=s;
|
|
*s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
|
|
*s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
|
|
*s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
|
|
*s=tohex(i&0xf);
|
|
return s-bak+1;
|
|
}
|
|
|
|
static unsigned int fmt_ip6(char *s,const char ip[16]) {
|
|
unsigned int len;
|
|
unsigned int i;
|
|
unsigned int temp;
|
|
unsigned int compressing;
|
|
int j;
|
|
|
|
len = 0; compressing = 0;
|
|
for (j=0; j<16; j+=2) {
|
|
|
|
#ifdef V4MAPPEDPREFIX
|
|
if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
|
|
inet_ntoa_r(*(struct in_addr*)(ip+12),s);
|
|
temp=strlen(s);
|
|
return len+temp;
|
|
}
|
|
#endif
|
|
temp = ((unsigned long) (unsigned char) ip[j] << 8) +
|
|
(unsigned long) (unsigned char) ip[j+1];
|
|
if (temp == 0) {
|
|
if (!compressing) {
|
|
compressing=1;
|
|
if (j==0) {
|
|
*s++=':'; ++len;
|
|
}
|
|
}
|
|
} else {
|
|
if (compressing) {
|
|
compressing=0;
|
|
*s++=':'; ++len;
|
|
}
|
|
i = fmt_xlong(s,temp); len += i; s += i;
|
|
if (j<14) {
|
|
*s++ = ':';
|
|
++len;
|
|
}
|
|
}
|
|
}
|
|
if (compressing) {
|
|
*s++=':'; ++len;
|
|
}
|
|
*s=0;
|
|
return len;
|
|
}
|
|
|
|
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;
|
|
struct ipv6hdr *iph;
|
|
struct pktgen_hdr *pgh = NULL;
|
|
|
|
/* Update any of the values, used when we're incrementing various
|
|
* fields.
|
|
*/
|
|
mod_cur_headers(pkt_dev);
|
|
|
|
skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
|
|
if (!skb) {
|
|
sprintf(pkt_dev->result, "No memory");
|
|
return NULL;
|
|
}
|
|
|
|
skb_reserve(skb, 16);
|
|
|
|
/* Reserve for ethernet and IP header */
|
|
eth = (__u8 *) skb_push(skb, 14);
|
|
iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
|
|
udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
|
|
|
|
memcpy(eth, pkt_dev->hh, 12);
|
|
*(u16*)ð[12] = __constant_htons(ETH_P_IPV6);
|
|
|
|
datalen = pkt_dev->cur_pkt_size-14-
|
|
sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */
|
|
|
|
if (datalen < sizeof(struct pktgen_hdr)) {
|
|
datalen = sizeof(struct pktgen_hdr);
|
|
if (net_ratelimit())
|
|
printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen);
|
|
}
|
|
|
|
udph->source = htons(pkt_dev->cur_udp_src);
|
|
udph->dest = htons(pkt_dev->cur_udp_dst);
|
|
udph->len = htons(datalen + sizeof(struct udphdr));
|
|
udph->check = 0; /* No checksum */
|
|
|
|
*(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */
|
|
|
|
iph->hop_limit = 32;
|
|
|
|
iph->payload_len = htons(sizeof(struct udphdr) + datalen);
|
|
iph->nexthdr = IPPROTO_UDP;
|
|
|
|
ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
|
|
ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
|
|
|
|
skb->mac.raw = ((u8 *)iph) - 14;
|
|
skb->protocol = __constant_htons(ETH_P_IPV6);
|
|
skb->dev = odev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
|
|
if (pkt_dev->nfrags <= 0)
|
|
pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
|
|
else {
|
|
int frags = pkt_dev->nfrags;
|
|
int i;
|
|
|
|
pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
|
|
|
|
if (frags > MAX_SKB_FRAGS)
|
|
frags = MAX_SKB_FRAGS;
|
|
if (datalen > frags*PAGE_SIZE) {
|
|
skb_put(skb, datalen-frags*PAGE_SIZE);
|
|
datalen = frags*PAGE_SIZE;
|
|
}
|
|
|
|
i = 0;
|
|
while (datalen > 0) {
|
|
struct page *page = alloc_pages(GFP_KERNEL, 0);
|
|
skb_shinfo(skb)->frags[i].page = page;
|
|
skb_shinfo(skb)->frags[i].page_offset = 0;
|
|
skb_shinfo(skb)->frags[i].size =
|
|
(datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
|
|
datalen -= skb_shinfo(skb)->frags[i].size;
|
|
skb->len += skb_shinfo(skb)->frags[i].size;
|
|
skb->data_len += skb_shinfo(skb)->frags[i].size;
|
|
i++;
|
|
skb_shinfo(skb)->nr_frags = i;
|
|
}
|
|
|
|
while (i < frags) {
|
|
int rem;
|
|
|
|
if (i == 0)
|
|
break;
|
|
|
|
rem = skb_shinfo(skb)->frags[i - 1].size / 2;
|
|
if (rem == 0)
|
|
break;
|
|
|
|
skb_shinfo(skb)->frags[i - 1].size -= rem;
|
|
|
|
skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
|
|
get_page(skb_shinfo(skb)->frags[i].page);
|
|
skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
|
|
skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
|
|
skb_shinfo(skb)->frags[i].size = rem;
|
|
i++;
|
|
skb_shinfo(skb)->nr_frags = i;
|
|
}
|
|
}
|
|
|
|
/* Stamp the time, and sequence number, convert them to network byte order */
|
|
/* should we update cloned packets too ? */
|
|
if (pgh) {
|
|
struct timeval timestamp;
|
|
|
|
pgh->pgh_magic = htonl(PKTGEN_MAGIC);
|
|
pgh->seq_num = htonl(pkt_dev->seq_num);
|
|
|
|
do_gettimeofday(×tamp);
|
|
pgh->tv_sec = htonl(timestamp.tv_sec);
|
|
pgh->tv_usec = htonl(timestamp.tv_usec);
|
|
}
|
|
pkt_dev->seq_num++;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline 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 = NULL;
|
|
int started = 0;
|
|
|
|
PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
|
|
|
|
if_lock(t);
|
|
for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
|
|
|
|
/*
|
|
* setup odev and create initial packet.
|
|
*/
|
|
pktgen_setup_inject(pkt_dev);
|
|
|
|
if(pkt_dev->odev) {
|
|
pktgen_clear_counters(pkt_dev);
|
|
pkt_dev->running = 1; /* Cranke yeself! */
|
|
pkt_dev->skb = NULL;
|
|
pkt_dev->started_at = getCurUs();
|
|
pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
|
|
pkt_dev->next_tx_ns = 0;
|
|
|
|
strcpy(pkt_dev->result, "Starting");
|
|
started++;
|
|
}
|
|
else
|
|
strcpy(pkt_dev->result, "Error starting");
|
|
}
|
|
if_unlock(t);
|
|
if(started) t->control &= ~(T_STOP);
|
|
}
|
|
|
|
static void pktgen_stop_all_threads_ifs(void)
|
|
{
|
|
struct pktgen_thread *t = pktgen_threads;
|
|
|
|
PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n"));
|
|
|
|
thread_lock();
|
|
while(t) {
|
|
pktgen_stop(t);
|
|
t = t->next;
|
|
}
|
|
thread_unlock();
|
|
}
|
|
|
|
static int thread_is_running(struct pktgen_thread *t )
|
|
{
|
|
struct pktgen_dev *next;
|
|
int res = 0;
|
|
|
|
for(next=t->if_list; next; next=next->next) {
|
|
if(next->running) {
|
|
res = 1;
|
|
break;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int pktgen_wait_thread_run(struct pktgen_thread *t )
|
|
{
|
|
if_lock(t);
|
|
|
|
while(thread_is_running(t)) {
|
|
|
|
if_unlock(t);
|
|
|
|
msleep_interruptible(100);
|
|
|
|
if (signal_pending(current))
|
|
goto signal;
|
|
if_lock(t);
|
|
}
|
|
if_unlock(t);
|
|
return 1;
|
|
signal:
|
|
return 0;
|
|
}
|
|
|
|
static int pktgen_wait_all_threads_run(void)
|
|
{
|
|
struct pktgen_thread *t = pktgen_threads;
|
|
int sig = 1;
|
|
|
|
while (t) {
|
|
sig = pktgen_wait_thread_run(t);
|
|
if( sig == 0 ) break;
|
|
thread_lock();
|
|
t=t->next;
|
|
thread_unlock();
|
|
}
|
|
if(sig == 0) {
|
|
thread_lock();
|
|
while (t) {
|
|
t->control |= (T_STOP);
|
|
t=t->next;
|
|
}
|
|
thread_unlock();
|
|
}
|
|
return sig;
|
|
}
|
|
|
|
static void pktgen_run_all_threads(void)
|
|
{
|
|
struct pktgen_thread *t = pktgen_threads;
|
|
|
|
PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
|
|
|
|
thread_lock();
|
|
|
|
while(t) {
|
|
t->control |= (T_RUN);
|
|
t = t->next;
|
|
}
|
|
thread_unlock();
|
|
|
|
schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
|
|
|
|
pktgen_wait_all_threads_run();
|
|
}
|
|
|
|
|
|
static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
|
|
{
|
|
__u64 total_us, bps, mbps, pps, idle;
|
|
char *p = pkt_dev->result;
|
|
|
|
total_us = pkt_dev->stopped_at - pkt_dev->started_at;
|
|
|
|
idle = pkt_dev->idle_acc;
|
|
|
|
p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
|
|
(unsigned long long) total_us,
|
|
(unsigned long long)(total_us - idle),
|
|
(unsigned long long) idle,
|
|
(unsigned long long) pkt_dev->sofar,
|
|
pkt_dev->cur_pkt_size, nr_frags);
|
|
|
|
pps = pkt_dev->sofar * USEC_PER_SEC;
|
|
|
|
while ((total_us >> 32) != 0) {
|
|
pps >>= 1;
|
|
total_us >>= 1;
|
|
}
|
|
|
|
do_div(pps, total_us);
|
|
|
|
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)
|
|
{
|
|
|
|
if (!pkt_dev->running) {
|
|
printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pkt_dev->stopped_at = getCurUs();
|
|
pkt_dev->running = 0;
|
|
|
|
show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags);
|
|
|
|
if (pkt_dev->skb)
|
|
kfree_skb(pkt_dev->skb);
|
|
|
|
pkt_dev->skb = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pktgen_dev *next_to_run(struct pktgen_thread *t )
|
|
{
|
|
struct pktgen_dev *next, *best = NULL;
|
|
|
|
if_lock(t);
|
|
|
|
for(next=t->if_list; next ; next=next->next) {
|
|
if(!next->running) continue;
|
|
if(best == NULL) best=next;
|
|
else if ( next->next_tx_us < best->next_tx_us)
|
|
best = next;
|
|
}
|
|
if_unlock(t);
|
|
return best;
|
|
}
|
|
|
|
static void pktgen_stop(struct pktgen_thread *t) {
|
|
struct pktgen_dev *next = NULL;
|
|
|
|
PG_DEBUG(printk("pktgen: entering pktgen_stop.\n"));
|
|
|
|
if_lock(t);
|
|
|
|
for(next=t->if_list; next; next=next->next)
|
|
pktgen_stop_device(next);
|
|
|
|
if_unlock(t);
|
|
}
|
|
|
|
static void pktgen_rem_all_ifs(struct pktgen_thread *t)
|
|
{
|
|
struct pktgen_dev *cur, *next = NULL;
|
|
|
|
/* Remove all devices, free mem */
|
|
|
|
if_lock(t);
|
|
|
|
for(cur=t->if_list; cur; cur=next) {
|
|
next = cur->next;
|
|
pktgen_remove_device(t, cur);
|
|
}
|
|
|
|
if_unlock(t);
|
|
}
|
|
|
|
static void pktgen_rem_thread(struct pktgen_thread *t)
|
|
{
|
|
/* Remove from the thread list */
|
|
|
|
struct pktgen_thread *tmp = pktgen_threads;
|
|
|
|
remove_proc_entry(t->name, pg_proc_dir);
|
|
|
|
thread_lock();
|
|
|
|
if (tmp == t)
|
|
pktgen_threads = tmp->next;
|
|
else {
|
|
while (tmp) {
|
|
if (tmp->next == t) {
|
|
tmp->next = t->next;
|
|
t->next = NULL;
|
|
break;
|
|
}
|
|
tmp = tmp->next;
|
|
}
|
|
}
|
|
thread_unlock();
|
|
}
|
|
|
|
static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
|
|
{
|
|
struct net_device *odev = NULL;
|
|
__u64 idle_start = 0;
|
|
int ret;
|
|
|
|
odev = pkt_dev->odev;
|
|
|
|
if (pkt_dev->delay_us || pkt_dev->delay_ns) {
|
|
u64 now;
|
|
|
|
now = getCurUs();
|
|
if (now < pkt_dev->next_tx_us)
|
|
spin(pkt_dev, pkt_dev->next_tx_us);
|
|
|
|
/* This is max DELAY, this has special meaning of
|
|
* "never transmit"
|
|
*/
|
|
if (pkt_dev->delay_us == 0x7FFFFFFF) {
|
|
pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
|
|
pkt_dev->next_tx_ns = pkt_dev->delay_ns;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (netif_queue_stopped(odev) || need_resched()) {
|
|
idle_start = getCurUs();
|
|
|
|
if (!netif_running(odev)) {
|
|
pktgen_stop_device(pkt_dev);
|
|
goto out;
|
|
}
|
|
if (need_resched())
|
|
schedule();
|
|
|
|
pkt_dev->idle_acc += getCurUs() - idle_start;
|
|
|
|
if (netif_queue_stopped(odev)) {
|
|
pkt_dev->next_tx_us = getCurUs(); /* TODO */
|
|
pkt_dev->next_tx_ns = 0;
|
|
goto out; /* Try the next interface */
|
|
}
|
|
}
|
|
|
|
if (pkt_dev->last_ok || !pkt_dev->skb) {
|
|
if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) {
|
|
/* build a new pkt */
|
|
if (pkt_dev->skb)
|
|
kfree_skb(pkt_dev->skb);
|
|
|
|
pkt_dev->skb = fill_packet(odev, pkt_dev);
|
|
if (pkt_dev->skb == NULL) {
|
|
printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
|
|
schedule();
|
|
pkt_dev->clone_count--; /* back out increment, OOM */
|
|
goto out;
|
|
}
|
|
pkt_dev->allocated_skbs++;
|
|
pkt_dev->clone_count = 0; /* reset counter */
|
|
}
|
|
}
|
|
|
|
spin_lock_bh(&odev->xmit_lock);
|
|
if (!netif_queue_stopped(odev)) {
|
|
|
|
atomic_inc(&(pkt_dev->skb->users));
|
|
retry_now:
|
|
ret = odev->hard_start_xmit(pkt_dev->skb, odev);
|
|
if (likely(ret == NETDEV_TX_OK)) {
|
|
pkt_dev->last_ok = 1;
|
|
pkt_dev->sofar++;
|
|
pkt_dev->seq_num++;
|
|
pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
|
|
|
|
} else if (ret == NETDEV_TX_LOCKED
|
|
&& (odev->features & NETIF_F_LLTX)) {
|
|
cpu_relax();
|
|
goto retry_now;
|
|
} else { /* Retry it next time */
|
|
|
|
atomic_dec(&(pkt_dev->skb->users));
|
|
|
|
if (debug && net_ratelimit())
|
|
printk(KERN_INFO "pktgen: Hard xmit error\n");
|
|
|
|
pkt_dev->errors++;
|
|
pkt_dev->last_ok = 0;
|
|
}
|
|
|
|
pkt_dev->next_tx_us = getCurUs();
|
|
pkt_dev->next_tx_ns = 0;
|
|
|
|
pkt_dev->next_tx_us += pkt_dev->delay_us;
|
|
pkt_dev->next_tx_ns += pkt_dev->delay_ns;
|
|
|
|
if (pkt_dev->next_tx_ns > 1000) {
|
|
pkt_dev->next_tx_us++;
|
|
pkt_dev->next_tx_ns -= 1000;
|
|
}
|
|
}
|
|
|
|
else { /* Retry it next time */
|
|
pkt_dev->last_ok = 0;
|
|
pkt_dev->next_tx_us = getCurUs(); /* TODO */
|
|
pkt_dev->next_tx_ns = 0;
|
|
}
|
|
|
|
spin_unlock_bh(&odev->xmit_lock);
|
|
|
|
/* If pkt_dev->count is zero, then run forever */
|
|
if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
|
|
if (atomic_read(&(pkt_dev->skb->users)) != 1) {
|
|
idle_start = getCurUs();
|
|
while (atomic_read(&(pkt_dev->skb->users)) != 1) {
|
|
if (signal_pending(current)) {
|
|
break;
|
|
}
|
|
schedule();
|
|
}
|
|
pkt_dev->idle_acc += getCurUs() - idle_start;
|
|
}
|
|
|
|
/* Done with this */
|
|
pktgen_stop_device(pkt_dev);
|
|
}
|
|
out:;
|
|
}
|
|
|
|
/*
|
|
* Main loop of the thread goes here
|
|
*/
|
|
|
|
static void pktgen_thread_worker(struct pktgen_thread *t)
|
|
{
|
|
DEFINE_WAIT(wait);
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
int cpu = t->cpu;
|
|
sigset_t tmpsig;
|
|
u32 max_before_softirq;
|
|
u32 tx_since_softirq = 0;
|
|
|
|
daemonize("pktgen/%d", cpu);
|
|
|
|
/* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
|
tmpsig = current->blocked;
|
|
siginitsetinv(¤t->blocked,
|
|
sigmask(SIGKILL) |
|
|
sigmask(SIGSTOP)|
|
|
sigmask(SIGTERM));
|
|
|
|
recalc_sigpending();
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
/* Migrate to the right CPU */
|
|
set_cpus_allowed(current, cpumask_of_cpu(cpu));
|
|
if (smp_processor_id() != cpu)
|
|
BUG();
|
|
|
|
init_waitqueue_head(&t->queue);
|
|
|
|
t->control &= ~(T_TERMINATE);
|
|
t->control &= ~(T_RUN);
|
|
t->control &= ~(T_STOP);
|
|
t->control &= ~(T_REMDEV);
|
|
|
|
t->pid = current->pid;
|
|
|
|
PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
|
|
|
|
max_before_softirq = t->max_before_softirq;
|
|
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
mb();
|
|
|
|
while (1) {
|
|
|
|
__set_current_state(TASK_RUNNING);
|
|
|
|
/*
|
|
* Get next dev to xmit -- if any.
|
|
*/
|
|
|
|
pkt_dev = next_to_run(t);
|
|
|
|
if (pkt_dev) {
|
|
|
|
pktgen_xmit(pkt_dev);
|
|
|
|
/*
|
|
* We like to stay RUNNING but must also give
|
|
* others fair share.
|
|
*/
|
|
|
|
tx_since_softirq += pkt_dev->last_ok;
|
|
|
|
if (tx_since_softirq > max_before_softirq) {
|
|
if (local_softirq_pending())
|
|
do_softirq();
|
|
tx_since_softirq = 0;
|
|
}
|
|
} else {
|
|
prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
|
|
schedule_timeout(HZ/10);
|
|
finish_wait(&(t->queue), &wait);
|
|
}
|
|
|
|
/*
|
|
* Back from sleep, either due to the timeout or signal.
|
|
* We check if we have any "posted" work for us.
|
|
*/
|
|
|
|
if (t->control & T_TERMINATE || signal_pending(current))
|
|
/* we received a request to terminate ourself */
|
|
break;
|
|
|
|
|
|
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_REMDEV) {
|
|
pktgen_rem_all_ifs(t);
|
|
t->control &= ~(T_REMDEV);
|
|
}
|
|
|
|
if (need_resched())
|
|
schedule();
|
|
}
|
|
|
|
PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
|
|
pktgen_stop(t);
|
|
|
|
PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
|
|
pktgen_rem_all_ifs(t);
|
|
|
|
PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
|
|
pktgen_rem_thread(t);
|
|
}
|
|
|
|
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname)
|
|
{
|
|
struct pktgen_dev *pkt_dev = NULL;
|
|
if_lock(t);
|
|
|
|
for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
|
|
if (strncmp(pkt_dev->ifname, ifname, IFNAMSIZ) == 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if_unlock(t);
|
|
PG_DEBUG(printk("pktgen: 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;
|
|
|
|
if_lock(t);
|
|
|
|
if (pkt_dev->pg_thread) {
|
|
printk("pktgen: ERROR: already assigned to a thread.\n");
|
|
rv = -EBUSY;
|
|
goto out;
|
|
}
|
|
pkt_dev->next =t->if_list; t->if_list=pkt_dev;
|
|
pkt_dev->pg_thread = t;
|
|
pkt_dev->running = 0;
|
|
|
|
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;
|
|
struct proc_dir_entry *pe;
|
|
|
|
/* We don't allow a device to be on several threads */
|
|
|
|
pkt_dev = __pktgen_NN_threads(ifname, FIND);
|
|
if (pkt_dev) {
|
|
printk("pktgen: ERROR: interface already used.\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
|
|
if (!pkt_dev)
|
|
return -ENOMEM;
|
|
|
|
pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
|
|
if (pkt_dev->flows == NULL) {
|
|
kfree(pkt_dev);
|
|
return -ENOMEM;
|
|
}
|
|
memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
|
|
|
|
pkt_dev->min_pkt_size = ETH_ZLEN;
|
|
pkt_dev->max_pkt_size = ETH_ZLEN;
|
|
pkt_dev->nfrags = 0;
|
|
pkt_dev->clone_skb = pg_clone_skb_d;
|
|
pkt_dev->delay_us = pg_delay_d / 1000;
|
|
pkt_dev->delay_ns = pg_delay_d % 1000;
|
|
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;
|
|
|
|
strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
|
|
|
|
if (! pktgen_setup_dev(pkt_dev)) {
|
|
printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
|
|
if (pkt_dev->flows)
|
|
vfree(pkt_dev->flows);
|
|
kfree(pkt_dev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
pe = create_proc_entry(ifname, 0600, pg_proc_dir);
|
|
if (!pe) {
|
|
printk("pktgen: cannot create %s/%s procfs entry.\n",
|
|
PG_PROC_DIR, ifname);
|
|
if (pkt_dev->flows)
|
|
vfree(pkt_dev->flows);
|
|
kfree(pkt_dev);
|
|
return -EINVAL;
|
|
}
|
|
pe->proc_fops = &pktgen_if_fops;
|
|
pe->data = pkt_dev;
|
|
|
|
return add_dev_to_thread(t, pkt_dev);
|
|
}
|
|
|
|
static struct pktgen_thread * __init pktgen_find_thread(const char* name)
|
|
{
|
|
struct pktgen_thread *t = NULL;
|
|
|
|
thread_lock();
|
|
|
|
t = pktgen_threads;
|
|
while (t) {
|
|
if (strcmp(t->name, name) == 0)
|
|
break;
|
|
|
|
t = t->next;
|
|
}
|
|
thread_unlock();
|
|
return t;
|
|
}
|
|
|
|
static int __init pktgen_create_thread(const char* name, int cpu)
|
|
{
|
|
struct pktgen_thread *t = NULL;
|
|
struct proc_dir_entry *pe;
|
|
|
|
if (strlen(name) > 31) {
|
|
printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (pktgen_find_thread(name)) {
|
|
printk("pktgen: ERROR: thread: %s already exists\n", name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
|
|
if (!t) {
|
|
printk("pktgen: ERROR: out of memory, can't create new thread.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
strcpy(t->name, name);
|
|
spin_lock_init(&t->if_lock);
|
|
t->cpu = cpu;
|
|
|
|
pe = create_proc_entry(t->name, 0600, pg_proc_dir);
|
|
if (!pe) {
|
|
printk("pktgen: cannot create %s/%s procfs entry.\n",
|
|
PG_PROC_DIR, t->name);
|
|
kfree(t);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pe->proc_fops = &pktgen_thread_fops;
|
|
pe->data = t;
|
|
|
|
t->next = pktgen_threads;
|
|
pktgen_threads = t;
|
|
|
|
if (kernel_thread((void *) pktgen_thread_worker, (void *) t,
|
|
CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0)
|
|
printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
|
|
|
|
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 pktgen_dev *i, *prev = NULL;
|
|
|
|
i = t->if_list;
|
|
|
|
while(i) {
|
|
if(i == pkt_dev) {
|
|
if(prev) prev->next = i->next;
|
|
else t->if_list = NULL;
|
|
break;
|
|
}
|
|
prev = i;
|
|
i=i->next;
|
|
}
|
|
}
|
|
|
|
static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
|
|
{
|
|
|
|
PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
|
|
|
|
if (pkt_dev->running) {
|
|
printk("pktgen: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;
|
|
}
|
|
|
|
/* And update the thread if_list */
|
|
|
|
_rem_dev_from_if_list(t, pkt_dev);
|
|
|
|
/* Clean up proc file system */
|
|
|
|
remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
|
|
|
|
if (pkt_dev->flows)
|
|
vfree(pkt_dev->flows);
|
|
kfree(pkt_dev);
|
|
return 0;
|
|
}
|
|
|
|
static int __init pg_init(void)
|
|
{
|
|
int cpu;
|
|
struct proc_dir_entry *pe;
|
|
|
|
printk(version);
|
|
|
|
pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
|
|
if (!pg_proc_dir)
|
|
return -ENODEV;
|
|
pg_proc_dir->owner = THIS_MODULE;
|
|
|
|
pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
|
|
if (pe == NULL) {
|
|
printk("pktgen: ERROR: cannot create %s procfs entry.\n", PGCTRL);
|
|
proc_net_remove(PG_PROC_DIR);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pe->proc_fops = &pktgen_fops;
|
|
pe->data = NULL;
|
|
|
|
/* Register us to receive netdevice events */
|
|
register_netdevice_notifier(&pktgen_notifier_block);
|
|
|
|
for_each_online_cpu(cpu) {
|
|
char buf[30];
|
|
|
|
sprintf(buf, "kpktgend_%i", cpu);
|
|
pktgen_create_thread(buf, cpu);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit pg_cleanup(void)
|
|
{
|
|
wait_queue_head_t queue;
|
|
init_waitqueue_head(&queue);
|
|
|
|
/* Stop all interfaces & threads */
|
|
|
|
while (pktgen_threads) {
|
|
struct pktgen_thread *t = pktgen_threads;
|
|
pktgen_threads->control |= (T_TERMINATE);
|
|
|
|
wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ);
|
|
}
|
|
|
|
/* Un-register us from receiving netdevice events */
|
|
unregister_netdevice_notifier(&pktgen_notifier_block);
|
|
|
|
/* Clean up proc file system */
|
|
remove_proc_entry(PGCTRL, pg_proc_dir);
|
|
proc_net_remove(PG_PROC_DIR);
|
|
}
|
|
|
|
|
|
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_param(pg_count_d, int, 0);
|
|
module_param(pg_delay_d, int, 0);
|
|
module_param(pg_clone_skb_d, int, 0);
|
|
module_param(debug, int, 0);
|