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3896 lines
95 KiB
3896 lines
95 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Authors: |
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* Copyright 2001, 2002 by Robert Olsson <[email protected]> |
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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 <[email protected]> |
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* Ben Greear <[email protected]> |
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* Jens Låås <[email protected]> |
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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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* [email protected] |
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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. [email protected] |
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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 <[email protected]> |
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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 <[email protected]> |
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* |
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* Integrated to 2.5.x 021029 --Lucio Maciel ([email protected]) |
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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.rst for how to use this. |
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* |
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* The new operation: |
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* For each CPU one thread/process is created at start. This process checks |
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* for running devices in the if_list and sends packets until count is 0 it |
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* also the thread checks the thread->control which is used for inter-process |
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* communication. controlling process "posts" operations to the threads this |
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* way. |
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* The if_list is RCU protected, and the if_lock remains to protect updating |
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* of if_list, from "add_device" as it invoked from userspace (via proc write). |
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* |
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* By design there should only be *one* "controlling" process. In practice |
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* multiple write accesses gives unpredictable result. Understood by "write" |
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* to /proc gives result code thats should be read be the "writer". |
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* For practical use this should be no problem. |
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* |
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* Note when adding devices to a specific CPU there good idea to also assign |
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* /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. |
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* --ro |
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* |
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* Fix refcount off by one if first packet fails, potential null deref, |
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* memleak 030710- KJP |
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* |
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* First "ranges" functionality for ipv6 030726 --ro |
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* |
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* Included flow support. 030802 ANK. |
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* |
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* Fixed unaligned access on IA-64 Grant Grundler <[email protected]> |
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* |
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* Remove if fix from added Harald Welte <[email protected]> 040419 |
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* ia64 compilation fix from Aron Griffis <[email protected]> 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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* <[email protected]> 040923 |
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* |
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* Randy Dunlap fixed u64 printk compiler warning |
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* |
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* Remove FCS from BW calculation. Lennert Buytenhek <[email protected]> |
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* New time handling. Lennert Buytenhek <[email protected]> 041213 |
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* |
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* Corrections from Nikolai Malykh ([email protected]) |
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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 <[email protected]> |
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* 050103 |
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* |
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* MPLS support by Steven Whitehouse <[email protected]> |
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* |
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* 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <[email protected]> |
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* |
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* Fixed src_mac command to set source mac of packet to value specified in |
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* command by Adit Ranadive <[email protected]> |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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/mutex.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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#include <linux/vmalloc.h> |
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#include <linux/unistd.h> |
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#include <linux/string.h> |
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#include <linux/ptrace.h> |
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#include <linux/errno.h> |
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#include <linux/ioport.h> |
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#include <linux/interrupt.h> |
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#include <linux/capability.h> |
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#include <linux/hrtimer.h> |
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#include <linux/freezer.h> |
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#include <linux/delay.h> |
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#include <linux/timer.h> |
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#include <linux/list.h> |
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#include <linux/init.h> |
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#include <linux/skbuff.h> |
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#include <linux/netdevice.h> |
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#include <linux/inet.h> |
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#include <linux/inetdevice.h> |
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#include <linux/rtnetlink.h> |
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#include <linux/if_arp.h> |
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#include <linux/if_vlan.h> |
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#include <linux/in.h> |
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#include <linux/ip.h> |
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#include <linux/ipv6.h> |
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#include <linux/udp.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <linux/wait.h> |
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#include <linux/etherdevice.h> |
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#include <linux/kthread.h> |
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#include <linux/prefetch.h> |
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#include <linux/mmzone.h> |
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#include <net/net_namespace.h> |
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#include <net/checksum.h> |
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#include <net/ipv6.h> |
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#include <net/udp.h> |
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#include <net/ip6_checksum.h> |
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#include <net/addrconf.h> |
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#ifdef CONFIG_XFRM |
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#include <net/xfrm.h> |
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#endif |
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#include <net/netns/generic.h> |
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#include <asm/byteorder.h> |
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#include <linux/rcupdate.h> |
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#include <linux/bitops.h> |
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#include <linux/io.h> |
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#include <linux/timex.h> |
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#include <linux/uaccess.h> |
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#include <asm/dma.h> |
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#include <asm/div64.h> /* do_div */ |
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|
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#define VERSION "2.75" |
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#define IP_NAME_SZ 32 |
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#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ |
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#define MPLS_STACK_BOTTOM htonl(0x00000100) |
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|
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#define func_enter() pr_debug("entering %s\n", __func__); |
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|
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#define PKT_FLAGS \ |
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pf(IPV6) /* Interface in IPV6 Mode */ \ |
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pf(IPSRC_RND) /* IP-Src Random */ \ |
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pf(IPDST_RND) /* IP-Dst Random */ \ |
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pf(TXSIZE_RND) /* Transmit size is random */ \ |
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pf(UDPSRC_RND) /* UDP-Src Random */ \ |
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pf(UDPDST_RND) /* UDP-Dst Random */ \ |
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pf(UDPCSUM) /* Include UDP checksum */ \ |
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pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \ |
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pf(MPLS_RND) /* Random MPLS labels */ \ |
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pf(QUEUE_MAP_RND) /* queue map Random */ \ |
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pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \ |
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pf(FLOW_SEQ) /* Sequential flows */ \ |
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pf(IPSEC) /* ipsec on for flows */ \ |
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pf(MACSRC_RND) /* MAC-Src Random */ \ |
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pf(MACDST_RND) /* MAC-Dst Random */ \ |
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pf(VID_RND) /* Random VLAN ID */ \ |
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pf(SVID_RND) /* Random SVLAN ID */ \ |
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pf(NODE) /* Node memory alloc*/ \ |
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#define pf(flag) flag##_SHIFT, |
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enum pkt_flags { |
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PKT_FLAGS |
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}; |
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#undef pf |
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|
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/* Device flag bits */ |
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#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT); |
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PKT_FLAGS |
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#undef pf |
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#define pf(flag) __stringify(flag), |
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static char *pkt_flag_names[] = { |
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PKT_FLAGS |
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}; |
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#undef pf |
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#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names) |
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|
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/* Thread control flag bits */ |
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#define T_STOP (1<<0) /* Stop run */ |
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#define T_RUN (1<<1) /* Start run */ |
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#define T_REMDEVALL (1<<2) /* Remove all devs */ |
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#define T_REMDEV (1<<3) /* Remove one dev */ |
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/* Xmit modes */ |
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#define M_START_XMIT 0 /* Default normal TX */ |
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#define M_NETIF_RECEIVE 1 /* Inject packets into stack */ |
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#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */ |
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/* If lock -- protects updating of if_list */ |
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#define if_lock(t) mutex_lock(&(t->if_lock)); |
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#define if_unlock(t) mutex_unlock(&(t->if_lock)); |
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/* Used to help with determining the pkts on receive */ |
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#define PKTGEN_MAGIC 0xbe9be955 |
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#define PG_PROC_DIR "pktgen" |
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#define PGCTRL "pgctrl" |
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#define MAX_CFLOWS 65536 |
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#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) |
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#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) |
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struct flow_state { |
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__be32 cur_daddr; |
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int count; |
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#ifdef CONFIG_XFRM |
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struct xfrm_state *x; |
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#endif |
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__u32 flags; |
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}; |
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/* flow flag bits */ |
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#define F_INIT (1<<0) /* flow has been initialized */ |
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struct pktgen_dev { |
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/* |
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* Try to keep frequent/infrequent used vars. separated. |
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*/ |
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struct proc_dir_entry *entry; /* proc file */ |
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struct pktgen_thread *pg_thread;/* the owner */ |
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struct list_head list; /* chaining in the thread's run-queue */ |
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struct rcu_head rcu; /* freed by RCU */ |
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int running; /* if false, the test will stop */ |
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|
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/* If min != max, then we will either do a linear iteration, or |
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* we will do a random selection from within the range. |
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*/ |
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__u32 flags; |
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int xmit_mode; |
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int min_pkt_size; |
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int max_pkt_size; |
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int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ |
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int nfrags; |
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int removal_mark; /* non-zero => the device is marked for |
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* removal by worker thread */ |
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struct page *page; |
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u64 delay; /* nano-seconds */ |
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__u64 count; /* Default No packets to send */ |
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__u64 sofar; /* How many pkts we've sent so far */ |
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__u64 tx_bytes; /* How many bytes we've transmitted */ |
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__u64 errors; /* Errors when trying to transmit, */ |
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|
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/* runtime counters relating to clone_skb */ |
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__u32 clone_count; |
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int last_ok; /* Was last skb sent? |
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* Or a failed transmit of some sort? |
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* This will keep sequence numbers in order |
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*/ |
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ktime_t next_tx; |
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ktime_t started_at; |
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ktime_t stopped_at; |
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u64 idle_acc; /* nano-seconds */ |
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__u32 seq_num; |
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int clone_skb; /* |
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* Use multiple SKBs during packet gen. |
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* If this number is greater than 1, then |
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* that many copies of the same packet will be |
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* sent before a new packet is allocated. |
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* If you want to send 1024 identical packets |
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* before creating a new packet, |
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* set clone_skb to 1024. |
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*/ |
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char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ |
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char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ |
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char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ |
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char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ |
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struct in6_addr in6_saddr; |
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struct in6_addr in6_daddr; |
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struct in6_addr cur_in6_daddr; |
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struct in6_addr cur_in6_saddr; |
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/* For ranges */ |
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struct in6_addr min_in6_daddr; |
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struct in6_addr max_in6_daddr; |
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struct in6_addr min_in6_saddr; |
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struct in6_addr max_in6_saddr; |
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/* If we're doing ranges, random or incremental, then this |
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* defines the min/max for those ranges. |
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*/ |
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__be32 saddr_min; /* inclusive, source IP address */ |
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__be32 saddr_max; /* exclusive, source IP address */ |
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__be32 daddr_min; /* inclusive, dest IP address */ |
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__be32 daddr_max; /* exclusive, dest IP address */ |
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__u16 udp_src_min; /* inclusive, source UDP port */ |
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__u16 udp_src_max; /* exclusive, source UDP port */ |
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__u16 udp_dst_min; /* inclusive, dest UDP port */ |
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__u16 udp_dst_max; /* exclusive, dest UDP port */ |
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/* DSCP + ECN */ |
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__u8 tos; /* six MSB of (former) IPv4 TOS |
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are for dscp codepoint */ |
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__u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 |
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(see RFC 3260, sec. 4) */ |
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/* MPLS */ |
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unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ |
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__be32 labels[MAX_MPLS_LABELS]; |
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/* VLAN/SVLAN (802.1Q/Q-in-Q) */ |
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__u8 vlan_p; |
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__u8 vlan_cfi; |
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__u16 vlan_id; /* 0xffff means no vlan tag */ |
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__u8 svlan_p; |
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__u8 svlan_cfi; |
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__u16 svlan_id; /* 0xffff means no svlan tag */ |
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__u32 src_mac_count; /* How many MACs to iterate through */ |
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__u32 dst_mac_count; /* How many MACs to iterate through */ |
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unsigned char dst_mac[ETH_ALEN]; |
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unsigned char src_mac[ETH_ALEN]; |
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__u32 cur_dst_mac_offset; |
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__u32 cur_src_mac_offset; |
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__be32 cur_saddr; |
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__be32 cur_daddr; |
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__u16 ip_id; |
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__u16 cur_udp_dst; |
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__u16 cur_udp_src; |
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__u16 cur_queue_map; |
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__u32 cur_pkt_size; |
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__u32 last_pkt_size; |
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__u8 hh[14]; |
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/* = { |
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0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, |
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|
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We fill in SRC address later |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x08, 0x00 |
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}; |
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*/ |
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__u16 pad; /* pad out the hh struct to an even 16 bytes */ |
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struct sk_buff *skb; /* skb we are to transmit next, used for when we |
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* are transmitting the same one multiple times |
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*/ |
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struct net_device *odev; /* The out-going device. |
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* Note that the device should have it's |
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* pg_info pointer pointing back to this |
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* device. |
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* Set when the user specifies the out-going |
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* device name (not when the inject is |
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* started as it used to do.) |
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*/ |
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char odevname[32]; |
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struct flow_state *flows; |
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unsigned int cflows; /* Concurrent flows (config) */ |
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unsigned int lflow; /* Flow length (config) */ |
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unsigned int nflows; /* accumulated flows (stats) */ |
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unsigned int curfl; /* current sequenced flow (state)*/ |
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u16 queue_map_min; |
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u16 queue_map_max; |
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__u32 skb_priority; /* skb priority field */ |
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unsigned int burst; /* number of duplicated packets to burst */ |
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int node; /* Memory node */ |
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#ifdef CONFIG_XFRM |
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__u8 ipsmode; /* IPSEC mode (config) */ |
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__u8 ipsproto; /* IPSEC type (config) */ |
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__u32 spi; |
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struct xfrm_dst xdst; |
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struct dst_ops dstops; |
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#endif |
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char result[512]; |
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}; |
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struct pktgen_hdr { |
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__be32 pgh_magic; |
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__be32 seq_num; |
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__be32 tv_sec; |
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__be32 tv_usec; |
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}; |
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static unsigned int pg_net_id __read_mostly; |
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struct pktgen_net { |
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struct net *net; |
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struct proc_dir_entry *proc_dir; |
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struct list_head pktgen_threads; |
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bool pktgen_exiting; |
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}; |
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struct pktgen_thread { |
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struct mutex if_lock; /* for list of devices */ |
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struct list_head if_list; /* All device here */ |
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struct list_head th_list; |
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struct task_struct *tsk; |
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char result[512]; |
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|
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/* Field for thread to receive "posted" events terminate, |
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stop ifs etc. */ |
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u32 control; |
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int cpu; |
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wait_queue_head_t queue; |
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struct completion start_done; |
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struct pktgen_net *net; |
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}; |
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#define REMOVE 1 |
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#define FIND 0 |
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|
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static const char version[] = |
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"Packet Generator for packet performance testing. " |
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"Version: " VERSION "\n"; |
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|
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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, |
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const char *ifname, bool exact); |
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static int pktgen_device_event(struct notifier_block *, unsigned long, void *); |
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static void pktgen_run_all_threads(struct pktgen_net *pn); |
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static void pktgen_reset_all_threads(struct pktgen_net *pn); |
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static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); |
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static void pktgen_stop(struct pktgen_thread *t); |
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static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); |
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|
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/* Module parameters, defaults. */ |
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static int pg_count_d __read_mostly = 1000; |
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static int pg_delay_d __read_mostly; |
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static int pg_clone_skb_d __read_mostly; |
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static int debug __read_mostly; |
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static DEFINE_MUTEX(pktgen_thread_lock); |
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static struct notifier_block pktgen_notifier_block = { |
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.notifier_call = pktgen_device_event, |
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}; |
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/* |
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* /proc handling functions |
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* |
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*/ |
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static int pgctrl_show(struct seq_file *seq, void *v) |
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{ |
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seq_puts(seq, version); |
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return 0; |
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} |
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static ssize_t pgctrl_write(struct file *file, const char __user *buf, |
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size_t count, loff_t *ppos) |
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{ |
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char data[128]; |
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struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); |
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|
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if (!capable(CAP_NET_ADMIN)) |
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return -EPERM; |
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if (count == 0) |
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return -EINVAL; |
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if (count > sizeof(data)) |
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count = sizeof(data); |
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if (copy_from_user(data, buf, count)) |
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return -EFAULT; |
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|
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data[count - 1] = 0; /* Strip trailing '\n' and terminate string */ |
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if (!strcmp(data, "stop")) |
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pktgen_stop_all_threads_ifs(pn); |
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|
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else if (!strcmp(data, "start")) |
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pktgen_run_all_threads(pn); |
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|
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else if (!strcmp(data, "reset")) |
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pktgen_reset_all_threads(pn); |
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else |
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return -EINVAL; |
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return count; |
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} |
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|
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static int pgctrl_open(struct inode *inode, struct file *file) |
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{ |
|
return single_open(file, pgctrl_show, PDE_DATA(inode)); |
|
} |
|
|
|
static const struct proc_ops pktgen_proc_ops = { |
|
.proc_open = pgctrl_open, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_write = pgctrl_write, |
|
.proc_release = single_release, |
|
}; |
|
|
|
static int pktgen_if_show(struct seq_file *seq, void *v) |
|
{ |
|
const struct pktgen_dev *pkt_dev = seq->private; |
|
ktime_t stopped; |
|
unsigned int i; |
|
u64 idle; |
|
|
|
seq_printf(seq, |
|
"Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", |
|
(unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, |
|
pkt_dev->max_pkt_size); |
|
|
|
seq_printf(seq, |
|
" frags: %d delay: %llu clone_skb: %d ifname: %s\n", |
|
pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, |
|
pkt_dev->clone_skb, pkt_dev->odevname); |
|
|
|
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, |
|
pkt_dev->lflow); |
|
|
|
seq_printf(seq, |
|
" queue_map_min: %u queue_map_max: %u\n", |
|
pkt_dev->queue_map_min, |
|
pkt_dev->queue_map_max); |
|
|
|
if (pkt_dev->skb_priority) |
|
seq_printf(seq, " skb_priority: %u\n", |
|
pkt_dev->skb_priority); |
|
|
|
if (pkt_dev->flags & F_IPV6) { |
|
seq_printf(seq, |
|
" saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" |
|
" daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", |
|
&pkt_dev->in6_saddr, |
|
&pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, |
|
&pkt_dev->in6_daddr, |
|
&pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); |
|
} else { |
|
seq_printf(seq, |
|
" dst_min: %s dst_max: %s\n", |
|
pkt_dev->dst_min, pkt_dev->dst_max); |
|
seq_printf(seq, |
|
" src_min: %s src_max: %s\n", |
|
pkt_dev->src_min, pkt_dev->src_max); |
|
} |
|
|
|
seq_puts(seq, " src_mac: "); |
|
|
|
seq_printf(seq, "%pM ", |
|
is_zero_ether_addr(pkt_dev->src_mac) ? |
|
pkt_dev->odev->dev_addr : pkt_dev->src_mac); |
|
|
|
seq_puts(seq, "dst_mac: "); |
|
seq_printf(seq, "%pM\n", pkt_dev->dst_mac); |
|
|
|
seq_printf(seq, |
|
" udp_src_min: %d udp_src_max: %d" |
|
" udp_dst_min: %d udp_dst_max: %d\n", |
|
pkt_dev->udp_src_min, pkt_dev->udp_src_max, |
|
pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); |
|
|
|
seq_printf(seq, |
|
" src_mac_count: %d dst_mac_count: %d\n", |
|
pkt_dev->src_mac_count, pkt_dev->dst_mac_count); |
|
|
|
if (pkt_dev->nr_labels) { |
|
seq_puts(seq, " mpls: "); |
|
for (i = 0; i < pkt_dev->nr_labels; i++) |
|
seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), |
|
i == pkt_dev->nr_labels-1 ? "\n" : ", "); |
|
} |
|
|
|
if (pkt_dev->vlan_id != 0xffff) |
|
seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", |
|
pkt_dev->vlan_id, pkt_dev->vlan_p, |
|
pkt_dev->vlan_cfi); |
|
|
|
if (pkt_dev->svlan_id != 0xffff) |
|
seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", |
|
pkt_dev->svlan_id, pkt_dev->svlan_p, |
|
pkt_dev->svlan_cfi); |
|
|
|
if (pkt_dev->tos) |
|
seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); |
|
|
|
if (pkt_dev->traffic_class) |
|
seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); |
|
|
|
if (pkt_dev->burst > 1) |
|
seq_printf(seq, " burst: %d\n", pkt_dev->burst); |
|
|
|
if (pkt_dev->node >= 0) |
|
seq_printf(seq, " node: %d\n", pkt_dev->node); |
|
|
|
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) |
|
seq_puts(seq, " xmit_mode: netif_receive\n"); |
|
else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) |
|
seq_puts(seq, " xmit_mode: xmit_queue\n"); |
|
|
|
seq_puts(seq, " Flags: "); |
|
|
|
for (i = 0; i < NR_PKT_FLAGS; i++) { |
|
if (i == F_FLOW_SEQ) |
|
if (!pkt_dev->cflows) |
|
continue; |
|
|
|
if (pkt_dev->flags & (1 << i)) |
|
seq_printf(seq, "%s ", pkt_flag_names[i]); |
|
else if (i == F_FLOW_SEQ) |
|
seq_puts(seq, "FLOW_RND "); |
|
|
|
#ifdef CONFIG_XFRM |
|
if (i == F_IPSEC && pkt_dev->spi) |
|
seq_printf(seq, "spi:%u", pkt_dev->spi); |
|
#endif |
|
} |
|
|
|
seq_puts(seq, "\n"); |
|
|
|
/* not really stopped, more like last-running-at */ |
|
stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; |
|
idle = pkt_dev->idle_acc; |
|
do_div(idle, NSEC_PER_USEC); |
|
|
|
seq_printf(seq, |
|
"Current:\n pkts-sofar: %llu errors: %llu\n", |
|
(unsigned long long)pkt_dev->sofar, |
|
(unsigned long long)pkt_dev->errors); |
|
|
|
seq_printf(seq, |
|
" started: %lluus stopped: %lluus idle: %lluus\n", |
|
(unsigned long long) ktime_to_us(pkt_dev->started_at), |
|
(unsigned long long) ktime_to_us(stopped), |
|
(unsigned long long) idle); |
|
|
|
seq_printf(seq, |
|
" seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", |
|
pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, |
|
pkt_dev->cur_src_mac_offset); |
|
|
|
if (pkt_dev->flags & F_IPV6) { |
|
seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", |
|
&pkt_dev->cur_in6_saddr, |
|
&pkt_dev->cur_in6_daddr); |
|
} else |
|
seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", |
|
&pkt_dev->cur_saddr, &pkt_dev->cur_daddr); |
|
|
|
seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", |
|
pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); |
|
|
|
seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); |
|
|
|
seq_printf(seq, " flows: %u\n", pkt_dev->nflows); |
|
|
|
if (pkt_dev->result[0]) |
|
seq_printf(seq, "Result: %s\n", pkt_dev->result); |
|
else |
|
seq_puts(seq, "Result: Idle\n"); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, |
|
__u32 *num) |
|
{ |
|
int i = 0; |
|
*num = 0; |
|
|
|
for (; i < maxlen; i++) { |
|
int value; |
|
char c; |
|
*num <<= 4; |
|
if (get_user(c, &user_buffer[i])) |
|
return -EFAULT; |
|
value = hex_to_bin(c); |
|
if (value >= 0) |
|
*num |= value; |
|
else |
|
break; |
|
} |
|
return i; |
|
} |
|
|
|
static int count_trail_chars(const char __user * user_buffer, |
|
unsigned int maxlen) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < maxlen; i++) { |
|
char c; |
|
if (get_user(c, &user_buffer[i])) |
|
return -EFAULT; |
|
switch (c) { |
|
case '\"': |
|
case '\n': |
|
case '\r': |
|
case '\t': |
|
case ' ': |
|
case '=': |
|
break; |
|
default: |
|
goto done; |
|
} |
|
} |
|
done: |
|
return i; |
|
} |
|
|
|
static long num_arg(const char __user *user_buffer, unsigned long maxlen, |
|
unsigned long *num) |
|
{ |
|
int i; |
|
*num = 0; |
|
|
|
for (i = 0; i < maxlen; i++) { |
|
char c; |
|
if (get_user(c, &user_buffer[i])) |
|
return -EFAULT; |
|
if ((c >= '0') && (c <= '9')) { |
|
*num *= 10; |
|
*num += c - '0'; |
|
} else |
|
break; |
|
} |
|
return i; |
|
} |
|
|
|
static int strn_len(const char __user * user_buffer, unsigned int maxlen) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < maxlen; i++) { |
|
char c; |
|
if (get_user(c, &user_buffer[i])) |
|
return -EFAULT; |
|
switch (c) { |
|
case '\"': |
|
case '\n': |
|
case '\r': |
|
case '\t': |
|
case ' ': |
|
goto done_str; |
|
default: |
|
break; |
|
} |
|
} |
|
done_str: |
|
return i; |
|
} |
|
|
|
static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) |
|
{ |
|
unsigned int n = 0; |
|
char c; |
|
ssize_t i = 0; |
|
int len; |
|
|
|
pkt_dev->nr_labels = 0; |
|
do { |
|
__u32 tmp; |
|
len = hex32_arg(&buffer[i], 8, &tmp); |
|
if (len <= 0) |
|
return len; |
|
pkt_dev->labels[n] = htonl(tmp); |
|
if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) |
|
pkt_dev->flags |= F_MPLS_RND; |
|
i += len; |
|
if (get_user(c, &buffer[i])) |
|
return -EFAULT; |
|
i++; |
|
n++; |
|
if (n >= MAX_MPLS_LABELS) |
|
return -E2BIG; |
|
} while (c == ','); |
|
|
|
pkt_dev->nr_labels = n; |
|
return i; |
|
} |
|
|
|
static __u32 pktgen_read_flag(const char *f, bool *disable) |
|
{ |
|
__u32 i; |
|
|
|
if (f[0] == '!') { |
|
*disable = true; |
|
f++; |
|
} |
|
|
|
for (i = 0; i < NR_PKT_FLAGS; i++) { |
|
if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT) |
|
continue; |
|
|
|
/* allow only disabling ipv6 flag */ |
|
if (!*disable && i == IPV6_SHIFT) |
|
continue; |
|
|
|
if (strcmp(f, pkt_flag_names[i]) == 0) |
|
return 1 << i; |
|
} |
|
|
|
if (strcmp(f, "FLOW_RND") == 0) { |
|
*disable = !*disable; |
|
return F_FLOW_SEQ; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static ssize_t pktgen_if_write(struct file *file, |
|
const char __user * user_buffer, size_t count, |
|
loff_t * offset) |
|
{ |
|
struct seq_file *seq = file->private_data; |
|
struct pktgen_dev *pkt_dev = seq->private; |
|
int i, max, len; |
|
char name[16], valstr[32]; |
|
unsigned long value = 0; |
|
char *pg_result = NULL; |
|
int tmp = 0; |
|
char buf[128]; |
|
|
|
pg_result = &(pkt_dev->result[0]); |
|
|
|
if (count < 1) { |
|
pr_warn("wrong command format\n"); |
|
return -EINVAL; |
|
} |
|
|
|
max = count; |
|
tmp = count_trail_chars(user_buffer, max); |
|
if (tmp < 0) { |
|
pr_warn("illegal format\n"); |
|
return tmp; |
|
} |
|
i = tmp; |
|
|
|
/* Read variable name */ |
|
|
|
len = strn_len(&user_buffer[i], sizeof(name) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
memset(name, 0, sizeof(name)); |
|
if (copy_from_user(name, &user_buffer[i], len)) |
|
return -EFAULT; |
|
i += len; |
|
|
|
max = count - i; |
|
len = count_trail_chars(&user_buffer[i], max); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
|
|
if (debug) { |
|
size_t copy = min_t(size_t, count + 1, 1024); |
|
char *tp = strndup_user(user_buffer, copy); |
|
|
|
if (IS_ERR(tp)) |
|
return PTR_ERR(tp); |
|
|
|
pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp); |
|
kfree(tp); |
|
} |
|
|
|
if (!strcmp(name, "min_pkt_size")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value < 14 + 20 + 8) |
|
value = 14 + 20 + 8; |
|
if (value != pkt_dev->min_pkt_size) { |
|
pkt_dev->min_pkt_size = value; |
|
pkt_dev->cur_pkt_size = value; |
|
} |
|
sprintf(pg_result, "OK: min_pkt_size=%d", |
|
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=%d", |
|
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=%d", 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=%d", pkt_dev->nfrags); |
|
return count; |
|
} |
|
if (!strcmp(name, "delay")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value == 0x7FFFFFFF) |
|
pkt_dev->delay = ULLONG_MAX; |
|
else |
|
pkt_dev->delay = (u64)value; |
|
|
|
sprintf(pg_result, "OK: delay=%llu", |
|
(unsigned long long) pkt_dev->delay); |
|
return count; |
|
} |
|
if (!strcmp(name, "rate")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (!value) |
|
return len; |
|
pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; |
|
if (debug) |
|
pr_info("Delay set at: %llu ns\n", pkt_dev->delay); |
|
|
|
sprintf(pg_result, "OK: rate=%lu", value); |
|
return count; |
|
} |
|
if (!strcmp(name, "ratep")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (!value) |
|
return len; |
|
pkt_dev->delay = NSEC_PER_SEC/value; |
|
if (debug) |
|
pr_info("Delay set at: %llu ns\n", pkt_dev->delay); |
|
|
|
sprintf(pg_result, "OK: rate=%lu", value); |
|
return count; |
|
} |
|
if (!strcmp(name, "udp_src_min")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value != pkt_dev->udp_src_min) { |
|
pkt_dev->udp_src_min = value; |
|
pkt_dev->cur_udp_src = value; |
|
} |
|
sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); |
|
return count; |
|
} |
|
if (!strcmp(name, "udp_dst_min")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value != pkt_dev->udp_dst_min) { |
|
pkt_dev->udp_dst_min = value; |
|
pkt_dev->cur_udp_dst = value; |
|
} |
|
sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); |
|
return count; |
|
} |
|
if (!strcmp(name, "udp_src_max")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value != pkt_dev->udp_src_max) { |
|
pkt_dev->udp_src_max = value; |
|
pkt_dev->cur_udp_src = value; |
|
} |
|
sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); |
|
return count; |
|
} |
|
if (!strcmp(name, "udp_dst_max")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value != pkt_dev->udp_dst_max) { |
|
pkt_dev->udp_dst_max = value; |
|
pkt_dev->cur_udp_dst = value; |
|
} |
|
sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); |
|
return count; |
|
} |
|
if (!strcmp(name, "clone_skb")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
if ((value > 0) && |
|
((pkt_dev->xmit_mode == M_NETIF_RECEIVE) || |
|
!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) |
|
return -ENOTSUPP; |
|
i += len; |
|
pkt_dev->clone_skb = value; |
|
|
|
sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); |
|
return count; |
|
} |
|
if (!strcmp(name, "count")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
pkt_dev->count = value; |
|
sprintf(pg_result, "OK: count=%llu", |
|
(unsigned long long)pkt_dev->count); |
|
return count; |
|
} |
|
if (!strcmp(name, "src_mac_count")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (pkt_dev->src_mac_count != value) { |
|
pkt_dev->src_mac_count = value; |
|
pkt_dev->cur_src_mac_offset = 0; |
|
} |
|
sprintf(pg_result, "OK: src_mac_count=%d", |
|
pkt_dev->src_mac_count); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst_mac_count")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (pkt_dev->dst_mac_count != value) { |
|
pkt_dev->dst_mac_count = value; |
|
pkt_dev->cur_dst_mac_offset = 0; |
|
} |
|
sprintf(pg_result, "OK: dst_mac_count=%d", |
|
pkt_dev->dst_mac_count); |
|
return count; |
|
} |
|
if (!strcmp(name, "burst")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if ((value > 1) && |
|
((pkt_dev->xmit_mode == M_QUEUE_XMIT) || |
|
((pkt_dev->xmit_mode == M_START_XMIT) && |
|
(!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))))) |
|
return -ENOTSUPP; |
|
pkt_dev->burst = value < 1 ? 1 : value; |
|
sprintf(pg_result, "OK: burst=%u", pkt_dev->burst); |
|
return count; |
|
} |
|
if (!strcmp(name, "node")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
|
|
if (node_possible(value)) { |
|
pkt_dev->node = value; |
|
sprintf(pg_result, "OK: node=%d", pkt_dev->node); |
|
if (pkt_dev->page) { |
|
put_page(pkt_dev->page); |
|
pkt_dev->page = NULL; |
|
} |
|
} |
|
else |
|
sprintf(pg_result, "ERROR: node not possible"); |
|
return count; |
|
} |
|
if (!strcmp(name, "xmit_mode")) { |
|
char f[32]; |
|
|
|
memset(f, 0, 32); |
|
len = strn_len(&user_buffer[i], sizeof(f) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
if (copy_from_user(f, &user_buffer[i], len)) |
|
return -EFAULT; |
|
i += len; |
|
|
|
if (strcmp(f, "start_xmit") == 0) { |
|
pkt_dev->xmit_mode = M_START_XMIT; |
|
} else if (strcmp(f, "netif_receive") == 0) { |
|
/* clone_skb set earlier, not supported in this mode */ |
|
if (pkt_dev->clone_skb > 0) |
|
return -ENOTSUPP; |
|
|
|
pkt_dev->xmit_mode = M_NETIF_RECEIVE; |
|
|
|
/* make sure new packet is allocated every time |
|
* pktgen_xmit() is called |
|
*/ |
|
pkt_dev->last_ok = 1; |
|
|
|
/* override clone_skb if user passed default value |
|
* at module loading time |
|
*/ |
|
pkt_dev->clone_skb = 0; |
|
} else if (strcmp(f, "queue_xmit") == 0) { |
|
pkt_dev->xmit_mode = M_QUEUE_XMIT; |
|
pkt_dev->last_ok = 1; |
|
} else { |
|
sprintf(pg_result, |
|
"xmit_mode -:%s:- unknown\nAvailable modes: %s", |
|
f, "start_xmit, netif_receive\n"); |
|
return count; |
|
} |
|
sprintf(pg_result, "OK: xmit_mode=%s", f); |
|
return count; |
|
} |
|
if (!strcmp(name, "flag")) { |
|
__u32 flag; |
|
char f[32]; |
|
bool disable = false; |
|
|
|
memset(f, 0, 32); |
|
len = strn_len(&user_buffer[i], sizeof(f) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
if (copy_from_user(f, &user_buffer[i], len)) |
|
return -EFAULT; |
|
i += len; |
|
|
|
flag = pktgen_read_flag(f, &disable); |
|
|
|
if (flag) { |
|
if (disable) |
|
pkt_dev->flags &= ~flag; |
|
else |
|
pkt_dev->flags |= flag; |
|
} else { |
|
sprintf(pg_result, |
|
"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", |
|
f, |
|
"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " |
|
"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " |
|
"MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " |
|
"QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " |
|
"NO_TIMESTAMP, " |
|
#ifdef CONFIG_XFRM |
|
"IPSEC, " |
|
#endif |
|
"NODE_ALLOC\n"); |
|
return count; |
|
} |
|
sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { |
|
len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
if (strcmp(buf, pkt_dev->dst_min) != 0) { |
|
memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); |
|
strcpy(pkt_dev->dst_min, buf); |
|
pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); |
|
pkt_dev->cur_daddr = pkt_dev->daddr_min; |
|
} |
|
if (debug) |
|
pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); |
|
i += len; |
|
sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst_max")) { |
|
len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
if (strcmp(buf, pkt_dev->dst_max) != 0) { |
|
memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); |
|
strcpy(pkt_dev->dst_max, buf); |
|
pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); |
|
pkt_dev->cur_daddr = pkt_dev->daddr_max; |
|
} |
|
if (debug) |
|
pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); |
|
i += len; |
|
sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst6")) { |
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
pkt_dev->flags |= F_IPV6; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
|
|
in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); |
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); |
|
|
|
pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; |
|
|
|
if (debug) |
|
pr_debug("dst6 set to: %s\n", buf); |
|
|
|
i += len; |
|
sprintf(pg_result, "OK: dst6=%s", buf); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst6_min")) { |
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
pkt_dev->flags |= F_IPV6; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
|
|
in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); |
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); |
|
|
|
pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; |
|
if (debug) |
|
pr_debug("dst6_min set to: %s\n", buf); |
|
|
|
i += len; |
|
sprintf(pg_result, "OK: dst6_min=%s", buf); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst6_max")) { |
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
pkt_dev->flags |= F_IPV6; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
|
|
in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); |
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); |
|
|
|
if (debug) |
|
pr_debug("dst6_max set to: %s\n", buf); |
|
|
|
i += len; |
|
sprintf(pg_result, "OK: dst6_max=%s", buf); |
|
return count; |
|
} |
|
if (!strcmp(name, "src6")) { |
|
len = strn_len(&user_buffer[i], sizeof(buf) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
pkt_dev->flags |= F_IPV6; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
|
|
in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); |
|
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); |
|
|
|
pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; |
|
|
|
if (debug) |
|
pr_debug("src6 set to: %s\n", buf); |
|
|
|
i += len; |
|
sprintf(pg_result, "OK: src6=%s", buf); |
|
return count; |
|
} |
|
if (!strcmp(name, "src_min")) { |
|
len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
if (strcmp(buf, pkt_dev->src_min) != 0) { |
|
memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); |
|
strcpy(pkt_dev->src_min, buf); |
|
pkt_dev->saddr_min = in_aton(pkt_dev->src_min); |
|
pkt_dev->cur_saddr = pkt_dev->saddr_min; |
|
} |
|
if (debug) |
|
pr_debug("src_min set to: %s\n", pkt_dev->src_min); |
|
i += len; |
|
sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); |
|
return count; |
|
} |
|
if (!strcmp(name, "src_max")) { |
|
len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
if (copy_from_user(buf, &user_buffer[i], len)) |
|
return -EFAULT; |
|
buf[len] = 0; |
|
if (strcmp(buf, pkt_dev->src_max) != 0) { |
|
memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); |
|
strcpy(pkt_dev->src_max, buf); |
|
pkt_dev->saddr_max = in_aton(pkt_dev->src_max); |
|
pkt_dev->cur_saddr = pkt_dev->saddr_max; |
|
} |
|
if (debug) |
|
pr_debug("src_max set to: %s\n", pkt_dev->src_max); |
|
i += len; |
|
sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); |
|
return count; |
|
} |
|
if (!strcmp(name, "dst_mac")) { |
|
len = strn_len(&user_buffer[i], sizeof(valstr) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
memset(valstr, 0, sizeof(valstr)); |
|
if (copy_from_user(valstr, &user_buffer[i], len)) |
|
return -EFAULT; |
|
|
|
if (!mac_pton(valstr, pkt_dev->dst_mac)) |
|
return -EINVAL; |
|
/* Set up Dest MAC */ |
|
ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); |
|
|
|
sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); |
|
return count; |
|
} |
|
if (!strcmp(name, "src_mac")) { |
|
len = strn_len(&user_buffer[i], sizeof(valstr) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
memset(valstr, 0, sizeof(valstr)); |
|
if (copy_from_user(valstr, &user_buffer[i], len)) |
|
return -EFAULT; |
|
|
|
if (!mac_pton(valstr, pkt_dev->src_mac)) |
|
return -EINVAL; |
|
/* Set up Src MAC */ |
|
ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); |
|
|
|
sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "clear_counters")) { |
|
pktgen_clear_counters(pkt_dev); |
|
sprintf(pg_result, "OK: Clearing counters.\n"); |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "flows")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value > MAX_CFLOWS) |
|
value = MAX_CFLOWS; |
|
|
|
pkt_dev->cflows = value; |
|
sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); |
|
return count; |
|
} |
|
#ifdef CONFIG_XFRM |
|
if (!strcmp(name, "spi")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
pkt_dev->spi = value; |
|
sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); |
|
return count; |
|
} |
|
#endif |
|
if (!strcmp(name, "flowlen")) { |
|
len = num_arg(&user_buffer[i], 10, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
pkt_dev->lflow = value; |
|
sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "queue_map_min")) { |
|
len = num_arg(&user_buffer[i], 5, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
pkt_dev->queue_map_min = value; |
|
sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "queue_map_max")) { |
|
len = num_arg(&user_buffer[i], 5, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
pkt_dev->queue_map_max = value; |
|
sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "mpls")) { |
|
unsigned int n, cnt; |
|
|
|
len = get_labels(&user_buffer[i], pkt_dev); |
|
if (len < 0) |
|
return len; |
|
i += len; |
|
cnt = sprintf(pg_result, "OK: mpls="); |
|
for (n = 0; n < pkt_dev->nr_labels; n++) |
|
cnt += sprintf(pg_result + cnt, |
|
"%08x%s", ntohl(pkt_dev->labels[n]), |
|
n == pkt_dev->nr_labels-1 ? "" : ","); |
|
|
|
if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { |
|
pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ |
|
pkt_dev->svlan_id = 0xffff; |
|
|
|
if (debug) |
|
pr_debug("VLAN/SVLAN auto turned off\n"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "vlan_id")) { |
|
len = num_arg(&user_buffer[i], 4, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (value <= 4095) { |
|
pkt_dev->vlan_id = value; /* turn on VLAN */ |
|
|
|
if (debug) |
|
pr_debug("VLAN turned on\n"); |
|
|
|
if (debug && pkt_dev->nr_labels) |
|
pr_debug("MPLS auto turned off\n"); |
|
|
|
pkt_dev->nr_labels = 0; /* turn off MPLS */ |
|
sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); |
|
} else { |
|
pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ |
|
pkt_dev->svlan_id = 0xffff; |
|
|
|
if (debug) |
|
pr_debug("VLAN/SVLAN turned off\n"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "vlan_p")) { |
|
len = num_arg(&user_buffer[i], 1, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { |
|
pkt_dev->vlan_p = value; |
|
sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); |
|
} else { |
|
sprintf(pg_result, "ERROR: vlan_p must be 0-7"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "vlan_cfi")) { |
|
len = num_arg(&user_buffer[i], 1, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { |
|
pkt_dev->vlan_cfi = value; |
|
sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); |
|
} else { |
|
sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "svlan_id")) { |
|
len = num_arg(&user_buffer[i], 4, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { |
|
pkt_dev->svlan_id = value; /* turn on SVLAN */ |
|
|
|
if (debug) |
|
pr_debug("SVLAN turned on\n"); |
|
|
|
if (debug && pkt_dev->nr_labels) |
|
pr_debug("MPLS auto turned off\n"); |
|
|
|
pkt_dev->nr_labels = 0; /* turn off MPLS */ |
|
sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); |
|
} else { |
|
pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ |
|
pkt_dev->svlan_id = 0xffff; |
|
|
|
if (debug) |
|
pr_debug("VLAN/SVLAN turned off\n"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "svlan_p")) { |
|
len = num_arg(&user_buffer[i], 1, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { |
|
pkt_dev->svlan_p = value; |
|
sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); |
|
} else { |
|
sprintf(pg_result, "ERROR: svlan_p must be 0-7"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "svlan_cfi")) { |
|
len = num_arg(&user_buffer[i], 1, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { |
|
pkt_dev->svlan_cfi = value; |
|
sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); |
|
} else { |
|
sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "tos")) { |
|
__u32 tmp_value = 0; |
|
len = hex32_arg(&user_buffer[i], 2, &tmp_value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (len == 2) { |
|
pkt_dev->tos = tmp_value; |
|
sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); |
|
} else { |
|
sprintf(pg_result, "ERROR: tos must be 00-ff"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "traffic_class")) { |
|
__u32 tmp_value = 0; |
|
len = hex32_arg(&user_buffer[i], 2, &tmp_value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
if (len == 2) { |
|
pkt_dev->traffic_class = tmp_value; |
|
sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); |
|
} else { |
|
sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); |
|
} |
|
return count; |
|
} |
|
|
|
if (!strcmp(name, "skb_priority")) { |
|
len = num_arg(&user_buffer[i], 9, &value); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
pkt_dev->skb_priority = value; |
|
sprintf(pg_result, "OK: skb_priority=%i", |
|
pkt_dev->skb_priority); |
|
return count; |
|
} |
|
|
|
sprintf(pkt_dev->result, "No such parameter \"%s\"", name); |
|
return -EINVAL; |
|
} |
|
|
|
static int pktgen_if_open(struct inode *inode, struct file *file) |
|
{ |
|
return single_open(file, pktgen_if_show, PDE_DATA(inode)); |
|
} |
|
|
|
static const struct proc_ops pktgen_if_proc_ops = { |
|
.proc_open = pktgen_if_open, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_write = pktgen_if_write, |
|
.proc_release = single_release, |
|
}; |
|
|
|
static int pktgen_thread_show(struct seq_file *seq, void *v) |
|
{ |
|
struct pktgen_thread *t = seq->private; |
|
const struct pktgen_dev *pkt_dev; |
|
|
|
BUG_ON(!t); |
|
|
|
seq_puts(seq, "Running: "); |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) |
|
if (pkt_dev->running) |
|
seq_printf(seq, "%s ", pkt_dev->odevname); |
|
|
|
seq_puts(seq, "\nStopped: "); |
|
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) |
|
if (!pkt_dev->running) |
|
seq_printf(seq, "%s ", pkt_dev->odevname); |
|
|
|
if (t->result[0]) |
|
seq_printf(seq, "\nResult: %s\n", t->result); |
|
else |
|
seq_puts(seq, "\nResult: NA\n"); |
|
|
|
rcu_read_unlock(); |
|
|
|
return 0; |
|
} |
|
|
|
static ssize_t pktgen_thread_write(struct file *file, |
|
const char __user * user_buffer, |
|
size_t count, loff_t * offset) |
|
{ |
|
struct seq_file *seq = file->private_data; |
|
struct pktgen_thread *t = seq->private; |
|
int i, max, len, ret; |
|
char name[40]; |
|
char *pg_result; |
|
|
|
if (count < 1) { |
|
// sprintf(pg_result, "Wrong command format"); |
|
return -EINVAL; |
|
} |
|
|
|
max = count; |
|
len = count_trail_chars(user_buffer, max); |
|
if (len < 0) |
|
return len; |
|
|
|
i = len; |
|
|
|
/* Read variable name */ |
|
|
|
len = strn_len(&user_buffer[i], sizeof(name) - 1); |
|
if (len < 0) |
|
return len; |
|
|
|
memset(name, 0, sizeof(name)); |
|
if (copy_from_user(name, &user_buffer[i], len)) |
|
return -EFAULT; |
|
i += len; |
|
|
|
max = count - i; |
|
len = count_trail_chars(&user_buffer[i], max); |
|
if (len < 0) |
|
return len; |
|
|
|
i += len; |
|
|
|
if (debug) |
|
pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); |
|
|
|
if (!t) { |
|
pr_err("ERROR: No thread\n"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
pg_result = &(t->result[0]); |
|
|
|
if (!strcmp(name, "add_device")) { |
|
char f[32]; |
|
memset(f, 0, 32); |
|
len = strn_len(&user_buffer[i], sizeof(f) - 1); |
|
if (len < 0) { |
|
ret = len; |
|
goto out; |
|
} |
|
if (copy_from_user(f, &user_buffer[i], len)) |
|
return -EFAULT; |
|
i += len; |
|
mutex_lock(&pktgen_thread_lock); |
|
ret = pktgen_add_device(t, f); |
|
mutex_unlock(&pktgen_thread_lock); |
|
if (!ret) { |
|
ret = count; |
|
sprintf(pg_result, "OK: add_device=%s", f); |
|
} else |
|
sprintf(pg_result, "ERROR: can not add device %s", f); |
|
goto out; |
|
} |
|
|
|
if (!strcmp(name, "rem_device_all")) { |
|
mutex_lock(&pktgen_thread_lock); |
|
t->control |= T_REMDEVALL; |
|
mutex_unlock(&pktgen_thread_lock); |
|
schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ |
|
ret = count; |
|
sprintf(pg_result, "OK: rem_device_all"); |
|
goto out; |
|
} |
|
|
|
if (!strcmp(name, "max_before_softirq")) { |
|
sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); |
|
ret = count; |
|
goto out; |
|
} |
|
|
|
ret = -EINVAL; |
|
out: |
|
return ret; |
|
} |
|
|
|
static int pktgen_thread_open(struct inode *inode, struct file *file) |
|
{ |
|
return single_open(file, pktgen_thread_show, PDE_DATA(inode)); |
|
} |
|
|
|
static const struct proc_ops pktgen_thread_proc_ops = { |
|
.proc_open = pktgen_thread_open, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_write = pktgen_thread_write, |
|
.proc_release = single_release, |
|
}; |
|
|
|
/* Think find or remove for NN */ |
|
static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, |
|
const char *ifname, int remove) |
|
{ |
|
struct pktgen_thread *t; |
|
struct pktgen_dev *pkt_dev = NULL; |
|
bool exact = (remove == FIND); |
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) { |
|
pkt_dev = pktgen_find_dev(t, ifname, exact); |
|
if (pkt_dev) { |
|
if (remove) { |
|
pkt_dev->removal_mark = 1; |
|
t->control |= T_REMDEV; |
|
} |
|
break; |
|
} |
|
} |
|
return pkt_dev; |
|
} |
|
|
|
/* |
|
* mark a device for removal |
|
*/ |
|
static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) |
|
{ |
|
struct pktgen_dev *pkt_dev = NULL; |
|
const int max_tries = 10, msec_per_try = 125; |
|
int i = 0; |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
pr_debug("%s: marking %s for removal\n", __func__, ifname); |
|
|
|
while (1) { |
|
|
|
pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); |
|
if (pkt_dev == NULL) |
|
break; /* success */ |
|
|
|
mutex_unlock(&pktgen_thread_lock); |
|
pr_debug("%s: waiting for %s to disappear....\n", |
|
__func__, ifname); |
|
schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); |
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
if (++i >= max_tries) { |
|
pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", |
|
__func__, msec_per_try * i, ifname); |
|
break; |
|
} |
|
|
|
} |
|
|
|
mutex_unlock(&pktgen_thread_lock); |
|
} |
|
|
|
static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) |
|
{ |
|
struct pktgen_thread *t; |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) { |
|
struct pktgen_dev *pkt_dev; |
|
|
|
if_lock(t); |
|
list_for_each_entry(pkt_dev, &t->if_list, list) { |
|
if (pkt_dev->odev != dev) |
|
continue; |
|
|
|
proc_remove(pkt_dev->entry); |
|
|
|
pkt_dev->entry = proc_create_data(dev->name, 0600, |
|
pn->proc_dir, |
|
&pktgen_if_proc_ops, |
|
pkt_dev); |
|
if (!pkt_dev->entry) |
|
pr_err("can't move proc entry for '%s'\n", |
|
dev->name); |
|
break; |
|
} |
|
if_unlock(t); |
|
} |
|
mutex_unlock(&pktgen_thread_lock); |
|
} |
|
|
|
static int pktgen_device_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); |
|
|
|
if (pn->pktgen_exiting) |
|
return NOTIFY_DONE; |
|
|
|
/* It is OK that we do not hold the group lock right now, |
|
* as we run under the RTNL lock. |
|
*/ |
|
|
|
switch (event) { |
|
case NETDEV_CHANGENAME: |
|
pktgen_change_name(pn, dev); |
|
break; |
|
|
|
case NETDEV_UNREGISTER: |
|
pktgen_mark_device(pn, dev->name); |
|
break; |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, |
|
struct pktgen_dev *pkt_dev, |
|
const char *ifname) |
|
{ |
|
char b[IFNAMSIZ+5]; |
|
int i; |
|
|
|
for (i = 0; ifname[i] != '@'; i++) { |
|
if (i == IFNAMSIZ) |
|
break; |
|
|
|
b[i] = ifname[i]; |
|
} |
|
b[i] = 0; |
|
|
|
return dev_get_by_name(pn->net, b); |
|
} |
|
|
|
|
|
/* Associate pktgen_dev with a device. */ |
|
|
|
static int pktgen_setup_dev(const struct pktgen_net *pn, |
|
struct pktgen_dev *pkt_dev, const char *ifname) |
|
{ |
|
struct net_device *odev; |
|
int err; |
|
|
|
/* Clean old setups */ |
|
if (pkt_dev->odev) { |
|
dev_put(pkt_dev->odev); |
|
pkt_dev->odev = NULL; |
|
} |
|
|
|
odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); |
|
if (!odev) { |
|
pr_err("no such netdevice: \"%s\"\n", ifname); |
|
return -ENODEV; |
|
} |
|
|
|
if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) { |
|
pr_err("not an ethernet or loopback device: \"%s\"\n", ifname); |
|
err = -EINVAL; |
|
} else if (!netif_running(odev)) { |
|
pr_err("device is down: \"%s\"\n", ifname); |
|
err = -ENETDOWN; |
|
} else { |
|
pkt_dev->odev = odev; |
|
return 0; |
|
} |
|
|
|
dev_put(odev); |
|
return err; |
|
} |
|
|
|
/* Read pkt_dev from the interface and set up internal pktgen_dev |
|
* structure to have the right information to create/send packets |
|
*/ |
|
static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) |
|
{ |
|
int ntxq; |
|
|
|
if (!pkt_dev->odev) { |
|
pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); |
|
sprintf(pkt_dev->result, |
|
"ERROR: pkt_dev->odev == NULL in setup_inject.\n"); |
|
return; |
|
} |
|
|
|
/* make sure that we don't pick a non-existing transmit queue */ |
|
ntxq = pkt_dev->odev->real_num_tx_queues; |
|
|
|
if (ntxq <= pkt_dev->queue_map_min) { |
|
pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", |
|
pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, |
|
pkt_dev->odevname); |
|
pkt_dev->queue_map_min = (ntxq ?: 1) - 1; |
|
} |
|
if (pkt_dev->queue_map_max >= ntxq) { |
|
pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", |
|
pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, |
|
pkt_dev->odevname); |
|
pkt_dev->queue_map_max = (ntxq ?: 1) - 1; |
|
} |
|
|
|
/* Default to the interface's mac if not explicitly set. */ |
|
|
|
if (is_zero_ether_addr(pkt_dev->src_mac)) |
|
ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); |
|
|
|
/* Set up Dest MAC */ |
|
ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); |
|
|
|
if (pkt_dev->flags & F_IPV6) { |
|
int i, set = 0, err = 1; |
|
struct inet6_dev *idev; |
|
|
|
if (pkt_dev->min_pkt_size == 0) { |
|
pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) |
|
+ sizeof(struct udphdr) |
|
+ sizeof(struct pktgen_hdr) |
|
+ pkt_dev->pkt_overhead; |
|
} |
|
|
|
for (i = 0; i < sizeof(struct in6_addr); i++) |
|
if (pkt_dev->cur_in6_saddr.s6_addr[i]) { |
|
set = 1; |
|
break; |
|
} |
|
|
|
if (!set) { |
|
|
|
/* |
|
* Use linklevel address if unconfigured. |
|
* |
|
* use ipv6_get_lladdr if/when it's get exported |
|
*/ |
|
|
|
rcu_read_lock(); |
|
idev = __in6_dev_get(pkt_dev->odev); |
|
if (idev) { |
|
struct inet6_ifaddr *ifp; |
|
|
|
read_lock_bh(&idev->lock); |
|
list_for_each_entry(ifp, &idev->addr_list, if_list) { |
|
if ((ifp->scope & IFA_LINK) && |
|
!(ifp->flags & IFA_F_TENTATIVE)) { |
|
pkt_dev->cur_in6_saddr = ifp->addr; |
|
err = 0; |
|
break; |
|
} |
|
} |
|
read_unlock_bh(&idev->lock); |
|
} |
|
rcu_read_unlock(); |
|
if (err) |
|
pr_err("ERROR: IPv6 link address not available\n"); |
|
} |
|
} else { |
|
if (pkt_dev->min_pkt_size == 0) { |
|
pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) |
|
+ sizeof(struct udphdr) |
|
+ sizeof(struct pktgen_hdr) |
|
+ pkt_dev->pkt_overhead; |
|
} |
|
|
|
pkt_dev->saddr_min = 0; |
|
pkt_dev->saddr_max = 0; |
|
if (strlen(pkt_dev->src_min) == 0) { |
|
|
|
struct in_device *in_dev; |
|
|
|
rcu_read_lock(); |
|
in_dev = __in_dev_get_rcu(pkt_dev->odev); |
|
if (in_dev) { |
|
const struct in_ifaddr *ifa; |
|
|
|
ifa = rcu_dereference(in_dev->ifa_list); |
|
if (ifa) { |
|
pkt_dev->saddr_min = ifa->ifa_address; |
|
pkt_dev->saddr_max = pkt_dev->saddr_min; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
} else { |
|
pkt_dev->saddr_min = in_aton(pkt_dev->src_min); |
|
pkt_dev->saddr_max = in_aton(pkt_dev->src_max); |
|
} |
|
|
|
pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); |
|
pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); |
|
} |
|
/* Initialize current values. */ |
|
pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; |
|
if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) |
|
pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; |
|
|
|
pkt_dev->cur_dst_mac_offset = 0; |
|
pkt_dev->cur_src_mac_offset = 0; |
|
pkt_dev->cur_saddr = pkt_dev->saddr_min; |
|
pkt_dev->cur_daddr = pkt_dev->daddr_min; |
|
pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; |
|
pkt_dev->cur_udp_src = pkt_dev->udp_src_min; |
|
pkt_dev->nflows = 0; |
|
} |
|
|
|
|
|
static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) |
|
{ |
|
ktime_t start_time, end_time; |
|
s64 remaining; |
|
struct hrtimer_sleeper t; |
|
|
|
hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
|
hrtimer_set_expires(&t.timer, spin_until); |
|
|
|
remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); |
|
if (remaining <= 0) |
|
goto out; |
|
|
|
start_time = ktime_get(); |
|
if (remaining < 100000) { |
|
/* for small delays (<100us), just loop until limit is reached */ |
|
do { |
|
end_time = ktime_get(); |
|
} while (ktime_compare(end_time, spin_until) < 0); |
|
} else { |
|
do { |
|
set_current_state(TASK_INTERRUPTIBLE); |
|
hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS); |
|
|
|
if (likely(t.task)) |
|
schedule(); |
|
|
|
hrtimer_cancel(&t.timer); |
|
} while (t.task && pkt_dev->running && !signal_pending(current)); |
|
__set_current_state(TASK_RUNNING); |
|
end_time = ktime_get(); |
|
} |
|
|
|
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); |
|
out: |
|
pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); |
|
destroy_hrtimer_on_stack(&t.timer); |
|
} |
|
|
|
static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) |
|
{ |
|
pkt_dev->pkt_overhead = 0; |
|
pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); |
|
pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); |
|
pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); |
|
} |
|
|
|
static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) |
|
{ |
|
return !!(pkt_dev->flows[flow].flags & F_INIT); |
|
} |
|
|
|
static inline int f_pick(struct pktgen_dev *pkt_dev) |
|
{ |
|
int flow = pkt_dev->curfl; |
|
|
|
if (pkt_dev->flags & F_FLOW_SEQ) { |
|
if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { |
|
/* reset time */ |
|
pkt_dev->flows[flow].count = 0; |
|
pkt_dev->flows[flow].flags = 0; |
|
pkt_dev->curfl += 1; |
|
if (pkt_dev->curfl >= pkt_dev->cflows) |
|
pkt_dev->curfl = 0; /*reset */ |
|
} |
|
} else { |
|
flow = prandom_u32() % pkt_dev->cflows; |
|
pkt_dev->curfl = flow; |
|
|
|
if (pkt_dev->flows[flow].count > pkt_dev->lflow) { |
|
pkt_dev->flows[flow].count = 0; |
|
pkt_dev->flows[flow].flags = 0; |
|
} |
|
} |
|
|
|
return pkt_dev->curfl; |
|
} |
|
|
|
|
|
#ifdef CONFIG_XFRM |
|
/* If there was already an IPSEC SA, we keep it as is, else |
|
* we go look for it ... |
|
*/ |
|
#define DUMMY_MARK 0 |
|
static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) |
|
{ |
|
struct xfrm_state *x = pkt_dev->flows[flow].x; |
|
struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); |
|
if (!x) { |
|
|
|
if (pkt_dev->spi) { |
|
/* We need as quick as possible to find the right SA |
|
* Searching with minimum criteria to archieve this. |
|
*/ |
|
x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); |
|
} else { |
|
/* slow path: we dont already have xfrm_state */ |
|
x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0, |
|
(xfrm_address_t *)&pkt_dev->cur_daddr, |
|
(xfrm_address_t *)&pkt_dev->cur_saddr, |
|
AF_INET, |
|
pkt_dev->ipsmode, |
|
pkt_dev->ipsproto, 0); |
|
} |
|
if (x) { |
|
pkt_dev->flows[flow].x = x; |
|
set_pkt_overhead(pkt_dev); |
|
pkt_dev->pkt_overhead += x->props.header_len; |
|
} |
|
|
|
} |
|
} |
|
#endif |
|
static void set_cur_queue_map(struct pktgen_dev *pkt_dev) |
|
{ |
|
|
|
if (pkt_dev->flags & F_QUEUE_MAP_CPU) |
|
pkt_dev->cur_queue_map = smp_processor_id(); |
|
|
|
else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { |
|
__u16 t; |
|
if (pkt_dev->flags & F_QUEUE_MAP_RND) { |
|
t = prandom_u32() % |
|
(pkt_dev->queue_map_max - |
|
pkt_dev->queue_map_min + 1) |
|
+ pkt_dev->queue_map_min; |
|
} else { |
|
t = pkt_dev->cur_queue_map + 1; |
|
if (t > pkt_dev->queue_map_max) |
|
t = pkt_dev->queue_map_min; |
|
} |
|
pkt_dev->cur_queue_map = t; |
|
} |
|
pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; |
|
} |
|
|
|
/* Increment/randomize headers according to flags and current values |
|
* for IP src/dest, UDP src/dst port, MAC-Addr src/dst |
|
*/ |
|
static void mod_cur_headers(struct pktgen_dev *pkt_dev) |
|
{ |
|
__u32 imn; |
|
__u32 imx; |
|
int flow = 0; |
|
|
|
if (pkt_dev->cflows) |
|
flow = f_pick(pkt_dev); |
|
|
|
/* Deal with source MAC */ |
|
if (pkt_dev->src_mac_count > 1) { |
|
__u32 mc; |
|
__u32 tmp; |
|
|
|
if (pkt_dev->flags & F_MACSRC_RND) |
|
mc = prandom_u32() % pkt_dev->src_mac_count; |
|
else { |
|
mc = pkt_dev->cur_src_mac_offset++; |
|
if (pkt_dev->cur_src_mac_offset >= |
|
pkt_dev->src_mac_count) |
|
pkt_dev->cur_src_mac_offset = 0; |
|
} |
|
|
|
tmp = pkt_dev->src_mac[5] + (mc & 0xFF); |
|
pkt_dev->hh[11] = tmp; |
|
tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); |
|
pkt_dev->hh[10] = tmp; |
|
tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); |
|
pkt_dev->hh[9] = tmp; |
|
tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); |
|
pkt_dev->hh[8] = tmp; |
|
tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); |
|
pkt_dev->hh[7] = tmp; |
|
} |
|
|
|
/* Deal with Destination MAC */ |
|
if (pkt_dev->dst_mac_count > 1) { |
|
__u32 mc; |
|
__u32 tmp; |
|
|
|
if (pkt_dev->flags & F_MACDST_RND) |
|
mc = prandom_u32() % pkt_dev->dst_mac_count; |
|
|
|
else { |
|
mc = pkt_dev->cur_dst_mac_offset++; |
|
if (pkt_dev->cur_dst_mac_offset >= |
|
pkt_dev->dst_mac_count) { |
|
pkt_dev->cur_dst_mac_offset = 0; |
|
} |
|
} |
|
|
|
tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); |
|
pkt_dev->hh[5] = tmp; |
|
tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); |
|
pkt_dev->hh[4] = tmp; |
|
tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); |
|
pkt_dev->hh[3] = tmp; |
|
tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); |
|
pkt_dev->hh[2] = tmp; |
|
tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); |
|
pkt_dev->hh[1] = tmp; |
|
} |
|
|
|
if (pkt_dev->flags & F_MPLS_RND) { |
|
unsigned int i; |
|
for (i = 0; i < pkt_dev->nr_labels; i++) |
|
if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) |
|
pkt_dev->labels[i] = MPLS_STACK_BOTTOM | |
|
((__force __be32)prandom_u32() & |
|
htonl(0x000fffff)); |
|
} |
|
|
|
if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { |
|
pkt_dev->vlan_id = prandom_u32() & (4096 - 1); |
|
} |
|
|
|
if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { |
|
pkt_dev->svlan_id = prandom_u32() & (4096 - 1); |
|
} |
|
|
|
if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { |
|
if (pkt_dev->flags & F_UDPSRC_RND) |
|
pkt_dev->cur_udp_src = prandom_u32() % |
|
(pkt_dev->udp_src_max - pkt_dev->udp_src_min) |
|
+ pkt_dev->udp_src_min; |
|
|
|
else { |
|
pkt_dev->cur_udp_src++; |
|
if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) |
|
pkt_dev->cur_udp_src = pkt_dev->udp_src_min; |
|
} |
|
} |
|
|
|
if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { |
|
if (pkt_dev->flags & F_UDPDST_RND) { |
|
pkt_dev->cur_udp_dst = prandom_u32() % |
|
(pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) |
|
+ pkt_dev->udp_dst_min; |
|
} else { |
|
pkt_dev->cur_udp_dst++; |
|
if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) |
|
pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; |
|
} |
|
} |
|
|
|
if (!(pkt_dev->flags & F_IPV6)) { |
|
|
|
imn = ntohl(pkt_dev->saddr_min); |
|
imx = ntohl(pkt_dev->saddr_max); |
|
if (imn < imx) { |
|
__u32 t; |
|
if (pkt_dev->flags & F_IPSRC_RND) |
|
t = prandom_u32() % (imx - imn) + imn; |
|
else { |
|
t = ntohl(pkt_dev->cur_saddr); |
|
t++; |
|
if (t > imx) |
|
t = imn; |
|
|
|
} |
|
pkt_dev->cur_saddr = htonl(t); |
|
} |
|
|
|
if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { |
|
pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; |
|
} else { |
|
imn = ntohl(pkt_dev->daddr_min); |
|
imx = ntohl(pkt_dev->daddr_max); |
|
if (imn < imx) { |
|
__u32 t; |
|
__be32 s; |
|
if (pkt_dev->flags & F_IPDST_RND) { |
|
|
|
do { |
|
t = prandom_u32() % |
|
(imx - imn) + imn; |
|
s = htonl(t); |
|
} while (ipv4_is_loopback(s) || |
|
ipv4_is_multicast(s) || |
|
ipv4_is_lbcast(s) || |
|
ipv4_is_zeronet(s) || |
|
ipv4_is_local_multicast(s)); |
|
pkt_dev->cur_daddr = s; |
|
} else { |
|
t = ntohl(pkt_dev->cur_daddr); |
|
t++; |
|
if (t > imx) { |
|
t = imn; |
|
} |
|
pkt_dev->cur_daddr = htonl(t); |
|
} |
|
} |
|
if (pkt_dev->cflows) { |
|
pkt_dev->flows[flow].flags |= F_INIT; |
|
pkt_dev->flows[flow].cur_daddr = |
|
pkt_dev->cur_daddr; |
|
#ifdef CONFIG_XFRM |
|
if (pkt_dev->flags & F_IPSEC) |
|
get_ipsec_sa(pkt_dev, flow); |
|
#endif |
|
pkt_dev->nflows++; |
|
} |
|
} |
|
} else { /* IPV6 * */ |
|
|
|
if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { |
|
int i; |
|
|
|
/* Only random destinations yet */ |
|
|
|
for (i = 0; i < 4; i++) { |
|
pkt_dev->cur_in6_daddr.s6_addr32[i] = |
|
(((__force __be32)prandom_u32() | |
|
pkt_dev->min_in6_daddr.s6_addr32[i]) & |
|
pkt_dev->max_in6_daddr.s6_addr32[i]); |
|
} |
|
} |
|
} |
|
|
|
if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { |
|
__u32 t; |
|
if (pkt_dev->flags & F_TXSIZE_RND) { |
|
t = prandom_u32() % |
|
(pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) |
|
+ pkt_dev->min_pkt_size; |
|
} else { |
|
t = pkt_dev->cur_pkt_size + 1; |
|
if (t > pkt_dev->max_pkt_size) |
|
t = pkt_dev->min_pkt_size; |
|
} |
|
pkt_dev->cur_pkt_size = t; |
|
} |
|
|
|
set_cur_queue_map(pkt_dev); |
|
|
|
pkt_dev->flows[flow].count++; |
|
} |
|
|
|
|
|
#ifdef CONFIG_XFRM |
|
static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { |
|
|
|
[RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ |
|
}; |
|
|
|
static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) |
|
{ |
|
struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; |
|
int err = 0; |
|
struct net *net = dev_net(pkt_dev->odev); |
|
|
|
if (!x) |
|
return 0; |
|
/* XXX: we dont support tunnel mode for now until |
|
* we resolve the dst issue */ |
|
if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) |
|
return 0; |
|
|
|
/* But when user specify an valid SPI, transformation |
|
* supports both transport/tunnel mode + ESP/AH type. |
|
*/ |
|
if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) |
|
skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF; |
|
|
|
rcu_read_lock_bh(); |
|
err = pktgen_xfrm_outer_mode_output(x, skb); |
|
rcu_read_unlock_bh(); |
|
if (err) { |
|
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); |
|
goto error; |
|
} |
|
err = x->type->output(x, skb); |
|
if (err) { |
|
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); |
|
goto error; |
|
} |
|
spin_lock_bh(&x->lock); |
|
x->curlft.bytes += skb->len; |
|
x->curlft.packets++; |
|
spin_unlock_bh(&x->lock); |
|
error: |
|
return err; |
|
} |
|
|
|
static void free_SAs(struct pktgen_dev *pkt_dev) |
|
{ |
|
if (pkt_dev->cflows) { |
|
/* let go of the SAs if we have them */ |
|
int i; |
|
for (i = 0; i < pkt_dev->cflows; i++) { |
|
struct xfrm_state *x = pkt_dev->flows[i].x; |
|
if (x) { |
|
xfrm_state_put(x); |
|
pkt_dev->flows[i].x = NULL; |
|
} |
|
} |
|
} |
|
} |
|
|
|
static int process_ipsec(struct pktgen_dev *pkt_dev, |
|
struct sk_buff *skb, __be16 protocol) |
|
{ |
|
if (pkt_dev->flags & F_IPSEC) { |
|
struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; |
|
int nhead = 0; |
|
if (x) { |
|
struct ethhdr *eth; |
|
struct iphdr *iph; |
|
int ret; |
|
|
|
nhead = x->props.header_len - skb_headroom(skb); |
|
if (nhead > 0) { |
|
ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); |
|
if (ret < 0) { |
|
pr_err("Error expanding ipsec packet %d\n", |
|
ret); |
|
goto err; |
|
} |
|
} |
|
|
|
/* ipsec is not expecting ll header */ |
|
skb_pull(skb, ETH_HLEN); |
|
ret = pktgen_output_ipsec(skb, pkt_dev); |
|
if (ret) { |
|
pr_err("Error creating ipsec packet %d\n", ret); |
|
goto err; |
|
} |
|
/* restore ll */ |
|
eth = skb_push(skb, ETH_HLEN); |
|
memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN); |
|
eth->h_proto = protocol; |
|
|
|
/* Update IPv4 header len as well as checksum value */ |
|
iph = ip_hdr(skb); |
|
iph->tot_len = htons(skb->len - ETH_HLEN); |
|
ip_send_check(iph); |
|
} |
|
} |
|
return 1; |
|
err: |
|
kfree_skb(skb); |
|
return 0; |
|
} |
|
#endif |
|
|
|
static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) |
|
{ |
|
unsigned int i; |
|
for (i = 0; i < pkt_dev->nr_labels; i++) |
|
*mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; |
|
|
|
mpls--; |
|
*mpls |= MPLS_STACK_BOTTOM; |
|
} |
|
|
|
static inline __be16 build_tci(unsigned int id, unsigned int cfi, |
|
unsigned int prio) |
|
{ |
|
return htons(id | (cfi << 12) | (prio << 13)); |
|
} |
|
|
|
static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, |
|
int datalen) |
|
{ |
|
struct timespec64 timestamp; |
|
struct pktgen_hdr *pgh; |
|
|
|
pgh = skb_put(skb, sizeof(*pgh)); |
|
datalen -= sizeof(*pgh); |
|
|
|
if (pkt_dev->nfrags <= 0) { |
|
skb_put_zero(skb, datalen); |
|
} else { |
|
int frags = pkt_dev->nfrags; |
|
int i, len; |
|
int frag_len; |
|
|
|
|
|
if (frags > MAX_SKB_FRAGS) |
|
frags = MAX_SKB_FRAGS; |
|
len = datalen - frags * PAGE_SIZE; |
|
if (len > 0) { |
|
skb_put_zero(skb, len); |
|
datalen = frags * PAGE_SIZE; |
|
} |
|
|
|
i = 0; |
|
frag_len = (datalen/frags) < PAGE_SIZE ? |
|
(datalen/frags) : PAGE_SIZE; |
|
while (datalen > 0) { |
|
if (unlikely(!pkt_dev->page)) { |
|
int node = numa_node_id(); |
|
|
|
if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) |
|
node = pkt_dev->node; |
|
pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); |
|
if (!pkt_dev->page) |
|
break; |
|
} |
|
get_page(pkt_dev->page); |
|
skb_frag_set_page(skb, i, pkt_dev->page); |
|
skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0); |
|
/*last fragment, fill rest of data*/ |
|
if (i == (frags - 1)) |
|
skb_frag_size_set(&skb_shinfo(skb)->frags[i], |
|
(datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); |
|
else |
|
skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); |
|
datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); |
|
skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); |
|
skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); |
|
i++; |
|
skb_shinfo(skb)->nr_frags = i; |
|
} |
|
} |
|
|
|
/* Stamp the time, and sequence number, |
|
* convert them to network byte order |
|
*/ |
|
pgh->pgh_magic = htonl(PKTGEN_MAGIC); |
|
pgh->seq_num = htonl(pkt_dev->seq_num); |
|
|
|
if (pkt_dev->flags & F_NO_TIMESTAMP) { |
|
pgh->tv_sec = 0; |
|
pgh->tv_usec = 0; |
|
} else { |
|
/* |
|
* pgh->tv_sec wraps in y2106 when interpreted as unsigned |
|
* as done by wireshark, or y2038 when interpreted as signed. |
|
* This is probably harmless, but if anyone wants to improve |
|
* it, we could introduce a variant that puts 64-bit nanoseconds |
|
* into the respective header bytes. |
|
* This would also be slightly faster to read. |
|
*/ |
|
ktime_get_real_ts64(×tamp); |
|
pgh->tv_sec = htonl(timestamp.tv_sec); |
|
pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC); |
|
} |
|
} |
|
|
|
static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
unsigned int extralen = LL_RESERVED_SPACE(dev); |
|
struct sk_buff *skb = NULL; |
|
unsigned int size; |
|
|
|
size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead; |
|
if (pkt_dev->flags & F_NODE) { |
|
int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); |
|
|
|
skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); |
|
if (likely(skb)) { |
|
skb_reserve(skb, NET_SKB_PAD); |
|
skb->dev = dev; |
|
} |
|
} else { |
|
skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); |
|
} |
|
|
|
/* the caller pre-fetches from skb->data and reserves for the mac hdr */ |
|
if (likely(skb)) |
|
skb_reserve(skb, extralen - 16); |
|
|
|
return skb; |
|
} |
|
|
|
static struct sk_buff *fill_packet_ipv4(struct net_device *odev, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
struct sk_buff *skb = NULL; |
|
__u8 *eth; |
|
struct udphdr *udph; |
|
int datalen, iplen; |
|
struct iphdr *iph; |
|
__be16 protocol = htons(ETH_P_IP); |
|
__be32 *mpls; |
|
__be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ |
|
__be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ |
|
__be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ |
|
__be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ |
|
u16 queue_map; |
|
|
|
if (pkt_dev->nr_labels) |
|
protocol = htons(ETH_P_MPLS_UC); |
|
|
|
if (pkt_dev->vlan_id != 0xffff) |
|
protocol = htons(ETH_P_8021Q); |
|
|
|
/* Update any of the values, used when we're incrementing various |
|
* fields. |
|
*/ |
|
mod_cur_headers(pkt_dev); |
|
queue_map = pkt_dev->cur_queue_map; |
|
|
|
skb = pktgen_alloc_skb(odev, pkt_dev); |
|
if (!skb) { |
|
sprintf(pkt_dev->result, "No memory"); |
|
return NULL; |
|
} |
|
|
|
prefetchw(skb->data); |
|
skb_reserve(skb, 16); |
|
|
|
/* Reserve for ethernet and IP header */ |
|
eth = skb_push(skb, 14); |
|
mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); |
|
if (pkt_dev->nr_labels) |
|
mpls_push(mpls, pkt_dev); |
|
|
|
if (pkt_dev->vlan_id != 0xffff) { |
|
if (pkt_dev->svlan_id != 0xffff) { |
|
svlan_tci = skb_put(skb, sizeof(__be16)); |
|
*svlan_tci = build_tci(pkt_dev->svlan_id, |
|
pkt_dev->svlan_cfi, |
|
pkt_dev->svlan_p); |
|
svlan_encapsulated_proto = skb_put(skb, |
|
sizeof(__be16)); |
|
*svlan_encapsulated_proto = htons(ETH_P_8021Q); |
|
} |
|
vlan_tci = skb_put(skb, sizeof(__be16)); |
|
*vlan_tci = build_tci(pkt_dev->vlan_id, |
|
pkt_dev->vlan_cfi, |
|
pkt_dev->vlan_p); |
|
vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); |
|
*vlan_encapsulated_proto = htons(ETH_P_IP); |
|
} |
|
|
|
skb_reset_mac_header(skb); |
|
skb_set_network_header(skb, skb->len); |
|
iph = skb_put(skb, sizeof(struct iphdr)); |
|
|
|
skb_set_transport_header(skb, skb->len); |
|
udph = skb_put(skb, sizeof(struct udphdr)); |
|
skb_set_queue_mapping(skb, queue_map); |
|
skb->priority = pkt_dev->skb_priority; |
|
|
|
memcpy(eth, pkt_dev->hh, 12); |
|
*(__be16 *) & eth[12] = protocol; |
|
|
|
/* Eth + IPh + UDPh + mpls */ |
|
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - |
|
pkt_dev->pkt_overhead; |
|
if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) |
|
datalen = sizeof(struct pktgen_hdr); |
|
|
|
udph->source = htons(pkt_dev->cur_udp_src); |
|
udph->dest = htons(pkt_dev->cur_udp_dst); |
|
udph->len = htons(datalen + 8); /* DATA + udphdr */ |
|
udph->check = 0; |
|
|
|
iph->ihl = 5; |
|
iph->version = 4; |
|
iph->ttl = 32; |
|
iph->tos = pkt_dev->tos; |
|
iph->protocol = IPPROTO_UDP; /* UDP */ |
|
iph->saddr = pkt_dev->cur_saddr; |
|
iph->daddr = pkt_dev->cur_daddr; |
|
iph->id = htons(pkt_dev->ip_id); |
|
pkt_dev->ip_id++; |
|
iph->frag_off = 0; |
|
iplen = 20 + 8 + datalen; |
|
iph->tot_len = htons(iplen); |
|
ip_send_check(iph); |
|
skb->protocol = protocol; |
|
skb->dev = odev; |
|
skb->pkt_type = PACKET_HOST; |
|
|
|
pktgen_finalize_skb(pkt_dev, skb, datalen); |
|
|
|
if (!(pkt_dev->flags & F_UDPCSUM)) { |
|
skb->ip_summed = CHECKSUM_NONE; |
|
} else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) { |
|
skb->ip_summed = CHECKSUM_PARTIAL; |
|
skb->csum = 0; |
|
udp4_hwcsum(skb, iph->saddr, iph->daddr); |
|
} else { |
|
__wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); |
|
|
|
/* add protocol-dependent pseudo-header */ |
|
udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, |
|
datalen + 8, IPPROTO_UDP, csum); |
|
|
|
if (udph->check == 0) |
|
udph->check = CSUM_MANGLED_0; |
|
} |
|
|
|
#ifdef CONFIG_XFRM |
|
if (!process_ipsec(pkt_dev, skb, protocol)) |
|
return NULL; |
|
#endif |
|
|
|
return skb; |
|
} |
|
|
|
static struct sk_buff *fill_packet_ipv6(struct net_device *odev, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
struct sk_buff *skb = NULL; |
|
__u8 *eth; |
|
struct udphdr *udph; |
|
int datalen, udplen; |
|
struct ipv6hdr *iph; |
|
__be16 protocol = htons(ETH_P_IPV6); |
|
__be32 *mpls; |
|
__be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ |
|
__be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ |
|
__be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ |
|
__be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ |
|
u16 queue_map; |
|
|
|
if (pkt_dev->nr_labels) |
|
protocol = htons(ETH_P_MPLS_UC); |
|
|
|
if (pkt_dev->vlan_id != 0xffff) |
|
protocol = htons(ETH_P_8021Q); |
|
|
|
/* Update any of the values, used when we're incrementing various |
|
* fields. |
|
*/ |
|
mod_cur_headers(pkt_dev); |
|
queue_map = pkt_dev->cur_queue_map; |
|
|
|
skb = pktgen_alloc_skb(odev, pkt_dev); |
|
if (!skb) { |
|
sprintf(pkt_dev->result, "No memory"); |
|
return NULL; |
|
} |
|
|
|
prefetchw(skb->data); |
|
skb_reserve(skb, 16); |
|
|
|
/* Reserve for ethernet and IP header */ |
|
eth = skb_push(skb, 14); |
|
mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); |
|
if (pkt_dev->nr_labels) |
|
mpls_push(mpls, pkt_dev); |
|
|
|
if (pkt_dev->vlan_id != 0xffff) { |
|
if (pkt_dev->svlan_id != 0xffff) { |
|
svlan_tci = skb_put(skb, sizeof(__be16)); |
|
*svlan_tci = build_tci(pkt_dev->svlan_id, |
|
pkt_dev->svlan_cfi, |
|
pkt_dev->svlan_p); |
|
svlan_encapsulated_proto = skb_put(skb, |
|
sizeof(__be16)); |
|
*svlan_encapsulated_proto = htons(ETH_P_8021Q); |
|
} |
|
vlan_tci = skb_put(skb, sizeof(__be16)); |
|
*vlan_tci = build_tci(pkt_dev->vlan_id, |
|
pkt_dev->vlan_cfi, |
|
pkt_dev->vlan_p); |
|
vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); |
|
*vlan_encapsulated_proto = htons(ETH_P_IPV6); |
|
} |
|
|
|
skb_reset_mac_header(skb); |
|
skb_set_network_header(skb, skb->len); |
|
iph = skb_put(skb, sizeof(struct ipv6hdr)); |
|
|
|
skb_set_transport_header(skb, skb->len); |
|
udph = skb_put(skb, sizeof(struct udphdr)); |
|
skb_set_queue_mapping(skb, queue_map); |
|
skb->priority = pkt_dev->skb_priority; |
|
|
|
memcpy(eth, pkt_dev->hh, 12); |
|
*(__be16 *) ð[12] = protocol; |
|
|
|
/* Eth + IPh + UDPh + mpls */ |
|
datalen = pkt_dev->cur_pkt_size - 14 - |
|
sizeof(struct ipv6hdr) - sizeof(struct udphdr) - |
|
pkt_dev->pkt_overhead; |
|
|
|
if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { |
|
datalen = sizeof(struct pktgen_hdr); |
|
net_info_ratelimited("increased datalen to %d\n", datalen); |
|
} |
|
|
|
udplen = datalen + sizeof(struct udphdr); |
|
udph->source = htons(pkt_dev->cur_udp_src); |
|
udph->dest = htons(pkt_dev->cur_udp_dst); |
|
udph->len = htons(udplen); |
|
udph->check = 0; |
|
|
|
*(__be32 *) iph = htonl(0x60000000); /* Version + flow */ |
|
|
|
if (pkt_dev->traffic_class) { |
|
/* Version + traffic class + flow (0) */ |
|
*(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); |
|
} |
|
|
|
iph->hop_limit = 32; |
|
|
|
iph->payload_len = htons(udplen); |
|
iph->nexthdr = IPPROTO_UDP; |
|
|
|
iph->daddr = pkt_dev->cur_in6_daddr; |
|
iph->saddr = pkt_dev->cur_in6_saddr; |
|
|
|
skb->protocol = protocol; |
|
skb->dev = odev; |
|
skb->pkt_type = PACKET_HOST; |
|
|
|
pktgen_finalize_skb(pkt_dev, skb, datalen); |
|
|
|
if (!(pkt_dev->flags & F_UDPCSUM)) { |
|
skb->ip_summed = CHECKSUM_NONE; |
|
} else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) { |
|
skb->ip_summed = CHECKSUM_PARTIAL; |
|
skb->csum_start = skb_transport_header(skb) - skb->head; |
|
skb->csum_offset = offsetof(struct udphdr, check); |
|
udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); |
|
} else { |
|
__wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); |
|
|
|
/* add protocol-dependent pseudo-header */ |
|
udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); |
|
|
|
if (udph->check == 0) |
|
udph->check = CSUM_MANGLED_0; |
|
} |
|
|
|
return skb; |
|
} |
|
|
|
static struct sk_buff *fill_packet(struct net_device *odev, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
if (pkt_dev->flags & F_IPV6) |
|
return fill_packet_ipv6(odev, pkt_dev); |
|
else |
|
return fill_packet_ipv4(odev, pkt_dev); |
|
} |
|
|
|
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) |
|
{ |
|
pkt_dev->seq_num = 1; |
|
pkt_dev->idle_acc = 0; |
|
pkt_dev->sofar = 0; |
|
pkt_dev->tx_bytes = 0; |
|
pkt_dev->errors = 0; |
|
} |
|
|
|
/* Set up structure for sending pkts, clear counters */ |
|
|
|
static void pktgen_run(struct pktgen_thread *t) |
|
{ |
|
struct pktgen_dev *pkt_dev; |
|
int started = 0; |
|
|
|
func_enter(); |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { |
|
|
|
/* |
|
* setup odev and create initial packet. |
|
*/ |
|
pktgen_setup_inject(pkt_dev); |
|
|
|
if (pkt_dev->odev) { |
|
pktgen_clear_counters(pkt_dev); |
|
pkt_dev->skb = NULL; |
|
pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); |
|
|
|
set_pkt_overhead(pkt_dev); |
|
|
|
strcpy(pkt_dev->result, "Starting"); |
|
pkt_dev->running = 1; /* Cranke yeself! */ |
|
started++; |
|
} else |
|
strcpy(pkt_dev->result, "Error starting"); |
|
} |
|
rcu_read_unlock(); |
|
if (started) |
|
t->control &= ~(T_STOP); |
|
} |
|
|
|
static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) |
|
{ |
|
struct pktgen_thread *t; |
|
|
|
func_enter(); |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) |
|
t->control |= T_STOP; |
|
|
|
mutex_unlock(&pktgen_thread_lock); |
|
} |
|
|
|
static int thread_is_running(const struct pktgen_thread *t) |
|
{ |
|
const struct pktgen_dev *pkt_dev; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) |
|
if (pkt_dev->running) { |
|
rcu_read_unlock(); |
|
return 1; |
|
} |
|
rcu_read_unlock(); |
|
return 0; |
|
} |
|
|
|
static int pktgen_wait_thread_run(struct pktgen_thread *t) |
|
{ |
|
while (thread_is_running(t)) { |
|
|
|
/* note: 't' will still be around even after the unlock/lock |
|
* cycle because pktgen_thread threads are only cleared at |
|
* net exit |
|
*/ |
|
mutex_unlock(&pktgen_thread_lock); |
|
msleep_interruptible(100); |
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
if (signal_pending(current)) |
|
goto signal; |
|
} |
|
return 1; |
|
signal: |
|
return 0; |
|
} |
|
|
|
static int pktgen_wait_all_threads_run(struct pktgen_net *pn) |
|
{ |
|
struct pktgen_thread *t; |
|
int sig = 1; |
|
|
|
/* prevent from racing with rmmod */ |
|
if (!try_module_get(THIS_MODULE)) |
|
return sig; |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) { |
|
sig = pktgen_wait_thread_run(t); |
|
if (sig == 0) |
|
break; |
|
} |
|
|
|
if (sig == 0) |
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) |
|
t->control |= (T_STOP); |
|
|
|
mutex_unlock(&pktgen_thread_lock); |
|
module_put(THIS_MODULE); |
|
return sig; |
|
} |
|
|
|
static void pktgen_run_all_threads(struct pktgen_net *pn) |
|
{ |
|
struct pktgen_thread *t; |
|
|
|
func_enter(); |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) |
|
t->control |= (T_RUN); |
|
|
|
mutex_unlock(&pktgen_thread_lock); |
|
|
|
/* Propagate thread->control */ |
|
schedule_timeout_interruptible(msecs_to_jiffies(125)); |
|
|
|
pktgen_wait_all_threads_run(pn); |
|
} |
|
|
|
static void pktgen_reset_all_threads(struct pktgen_net *pn) |
|
{ |
|
struct pktgen_thread *t; |
|
|
|
func_enter(); |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
|
|
list_for_each_entry(t, &pn->pktgen_threads, th_list) |
|
t->control |= (T_REMDEVALL); |
|
|
|
mutex_unlock(&pktgen_thread_lock); |
|
|
|
/* Propagate thread->control */ |
|
schedule_timeout_interruptible(msecs_to_jiffies(125)); |
|
|
|
pktgen_wait_all_threads_run(pn); |
|
} |
|
|
|
static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) |
|
{ |
|
__u64 bps, mbps, pps; |
|
char *p = pkt_dev->result; |
|
ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, |
|
pkt_dev->started_at); |
|
ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); |
|
|
|
p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", |
|
(unsigned long long)ktime_to_us(elapsed), |
|
(unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), |
|
(unsigned long long)ktime_to_us(idle), |
|
(unsigned long long)pkt_dev->sofar, |
|
pkt_dev->cur_pkt_size, nr_frags); |
|
|
|
pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, |
|
ktime_to_ns(elapsed)); |
|
|
|
bps = pps * 8 * pkt_dev->cur_pkt_size; |
|
|
|
mbps = bps; |
|
do_div(mbps, 1000000); |
|
p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", |
|
(unsigned long long)pps, |
|
(unsigned long long)mbps, |
|
(unsigned long long)bps, |
|
(unsigned long long)pkt_dev->errors); |
|
} |
|
|
|
/* Set stopped-at timer, remove from running list, do counters & statistics */ |
|
static int pktgen_stop_device(struct pktgen_dev *pkt_dev) |
|
{ |
|
int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; |
|
|
|
if (!pkt_dev->running) { |
|
pr_warn("interface: %s is already stopped\n", |
|
pkt_dev->odevname); |
|
return -EINVAL; |
|
} |
|
|
|
pkt_dev->running = 0; |
|
kfree_skb(pkt_dev->skb); |
|
pkt_dev->skb = NULL; |
|
pkt_dev->stopped_at = ktime_get(); |
|
|
|
show_results(pkt_dev, nr_frags); |
|
|
|
return 0; |
|
} |
|
|
|
static struct pktgen_dev *next_to_run(struct pktgen_thread *t) |
|
{ |
|
struct pktgen_dev *pkt_dev, *best = NULL; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { |
|
if (!pkt_dev->running) |
|
continue; |
|
if (best == NULL) |
|
best = pkt_dev; |
|
else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) |
|
best = pkt_dev; |
|
} |
|
rcu_read_unlock(); |
|
|
|
return best; |
|
} |
|
|
|
static void pktgen_stop(struct pktgen_thread *t) |
|
{ |
|
struct pktgen_dev *pkt_dev; |
|
|
|
func_enter(); |
|
|
|
rcu_read_lock(); |
|
|
|
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { |
|
pktgen_stop_device(pkt_dev); |
|
} |
|
|
|
rcu_read_unlock(); |
|
} |
|
|
|
/* |
|
* one of our devices needs to be removed - find it |
|
* and remove it |
|
*/ |
|
static void pktgen_rem_one_if(struct pktgen_thread *t) |
|
{ |
|
struct list_head *q, *n; |
|
struct pktgen_dev *cur; |
|
|
|
func_enter(); |
|
|
|
list_for_each_safe(q, n, &t->if_list) { |
|
cur = list_entry(q, struct pktgen_dev, list); |
|
|
|
if (!cur->removal_mark) |
|
continue; |
|
|
|
kfree_skb(cur->skb); |
|
cur->skb = NULL; |
|
|
|
pktgen_remove_device(t, cur); |
|
|
|
break; |
|
} |
|
} |
|
|
|
static void pktgen_rem_all_ifs(struct pktgen_thread *t) |
|
{ |
|
struct list_head *q, *n; |
|
struct pktgen_dev *cur; |
|
|
|
func_enter(); |
|
|
|
/* Remove all devices, free mem */ |
|
|
|
list_for_each_safe(q, n, &t->if_list) { |
|
cur = list_entry(q, struct pktgen_dev, list); |
|
|
|
kfree_skb(cur->skb); |
|
cur->skb = NULL; |
|
|
|
pktgen_remove_device(t, cur); |
|
} |
|
} |
|
|
|
static void pktgen_rem_thread(struct pktgen_thread *t) |
|
{ |
|
/* Remove from the thread list */ |
|
remove_proc_entry(t->tsk->comm, t->net->proc_dir); |
|
} |
|
|
|
static void pktgen_resched(struct pktgen_dev *pkt_dev) |
|
{ |
|
ktime_t idle_start = ktime_get(); |
|
schedule(); |
|
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); |
|
} |
|
|
|
static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) |
|
{ |
|
ktime_t idle_start = ktime_get(); |
|
|
|
while (refcount_read(&(pkt_dev->skb->users)) != 1) { |
|
if (signal_pending(current)) |
|
break; |
|
|
|
if (need_resched()) |
|
pktgen_resched(pkt_dev); |
|
else |
|
cpu_relax(); |
|
} |
|
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); |
|
} |
|
|
|
static void pktgen_xmit(struct pktgen_dev *pkt_dev) |
|
{ |
|
unsigned int burst = READ_ONCE(pkt_dev->burst); |
|
struct net_device *odev = pkt_dev->odev; |
|
struct netdev_queue *txq; |
|
struct sk_buff *skb; |
|
int ret; |
|
|
|
/* If device is offline, then don't send */ |
|
if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { |
|
pktgen_stop_device(pkt_dev); |
|
return; |
|
} |
|
|
|
/* This is max DELAY, this has special meaning of |
|
* "never transmit" |
|
*/ |
|
if (unlikely(pkt_dev->delay == ULLONG_MAX)) { |
|
pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); |
|
return; |
|
} |
|
|
|
/* If no skb or clone count exhausted then get new one */ |
|
if (!pkt_dev->skb || (pkt_dev->last_ok && |
|
++pkt_dev->clone_count >= pkt_dev->clone_skb)) { |
|
/* build a new pkt */ |
|
kfree_skb(pkt_dev->skb); |
|
|
|
pkt_dev->skb = fill_packet(odev, pkt_dev); |
|
if (pkt_dev->skb == NULL) { |
|
pr_err("ERROR: couldn't allocate skb in fill_packet\n"); |
|
schedule(); |
|
pkt_dev->clone_count--; /* back out increment, OOM */ |
|
return; |
|
} |
|
pkt_dev->last_pkt_size = pkt_dev->skb->len; |
|
pkt_dev->clone_count = 0; /* reset counter */ |
|
} |
|
|
|
if (pkt_dev->delay && pkt_dev->last_ok) |
|
spin(pkt_dev, pkt_dev->next_tx); |
|
|
|
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) { |
|
skb = pkt_dev->skb; |
|
skb->protocol = eth_type_trans(skb, skb->dev); |
|
refcount_add(burst, &skb->users); |
|
local_bh_disable(); |
|
do { |
|
ret = netif_receive_skb(skb); |
|
if (ret == NET_RX_DROP) |
|
pkt_dev->errors++; |
|
pkt_dev->sofar++; |
|
pkt_dev->seq_num++; |
|
if (refcount_read(&skb->users) != burst) { |
|
/* skb was queued by rps/rfs or taps, |
|
* so cannot reuse this skb |
|
*/ |
|
WARN_ON(refcount_sub_and_test(burst - 1, &skb->users)); |
|
/* get out of the loop and wait |
|
* until skb is consumed |
|
*/ |
|
break; |
|
} |
|
/* skb was 'freed' by stack, so clean few |
|
* bits and reuse it |
|
*/ |
|
skb_reset_redirect(skb); |
|
} while (--burst > 0); |
|
goto out; /* Skips xmit_mode M_START_XMIT */ |
|
} else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) { |
|
local_bh_disable(); |
|
refcount_inc(&pkt_dev->skb->users); |
|
|
|
ret = dev_queue_xmit(pkt_dev->skb); |
|
switch (ret) { |
|
case NET_XMIT_SUCCESS: |
|
pkt_dev->sofar++; |
|
pkt_dev->seq_num++; |
|
pkt_dev->tx_bytes += pkt_dev->last_pkt_size; |
|
break; |
|
case NET_XMIT_DROP: |
|
case NET_XMIT_CN: |
|
/* These are all valid return codes for a qdisc but |
|
* indicate packets are being dropped or will likely |
|
* be dropped soon. |
|
*/ |
|
case NETDEV_TX_BUSY: |
|
/* qdisc may call dev_hard_start_xmit directly in cases |
|
* where no queues exist e.g. loopback device, virtual |
|
* devices, etc. In this case we need to handle |
|
* NETDEV_TX_ codes. |
|
*/ |
|
default: |
|
pkt_dev->errors++; |
|
net_info_ratelimited("%s xmit error: %d\n", |
|
pkt_dev->odevname, ret); |
|
break; |
|
} |
|
goto out; |
|
} |
|
|
|
txq = skb_get_tx_queue(odev, pkt_dev->skb); |
|
|
|
local_bh_disable(); |
|
|
|
HARD_TX_LOCK(odev, txq, smp_processor_id()); |
|
|
|
if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { |
|
pkt_dev->last_ok = 0; |
|
goto unlock; |
|
} |
|
refcount_add(burst, &pkt_dev->skb->users); |
|
|
|
xmit_more: |
|
ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); |
|
|
|
switch (ret) { |
|
case NETDEV_TX_OK: |
|
pkt_dev->last_ok = 1; |
|
pkt_dev->sofar++; |
|
pkt_dev->seq_num++; |
|
pkt_dev->tx_bytes += pkt_dev->last_pkt_size; |
|
if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) |
|
goto xmit_more; |
|
break; |
|
case NET_XMIT_DROP: |
|
case NET_XMIT_CN: |
|
/* skb has been consumed */ |
|
pkt_dev->errors++; |
|
break; |
|
default: /* Drivers are not supposed to return other values! */ |
|
net_info_ratelimited("%s xmit error: %d\n", |
|
pkt_dev->odevname, ret); |
|
pkt_dev->errors++; |
|
fallthrough; |
|
case NETDEV_TX_BUSY: |
|
/* Retry it next time */ |
|
refcount_dec(&(pkt_dev->skb->users)); |
|
pkt_dev->last_ok = 0; |
|
} |
|
if (unlikely(burst)) |
|
WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users)); |
|
unlock: |
|
HARD_TX_UNLOCK(odev, txq); |
|
|
|
out: |
|
local_bh_enable(); |
|
|
|
/* If pkt_dev->count is zero, then run forever */ |
|
if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { |
|
pktgen_wait_for_skb(pkt_dev); |
|
|
|
/* Done with this */ |
|
pktgen_stop_device(pkt_dev); |
|
} |
|
} |
|
|
|
/* |
|
* Main loop of the thread goes here |
|
*/ |
|
|
|
static int pktgen_thread_worker(void *arg) |
|
{ |
|
DEFINE_WAIT(wait); |
|
struct pktgen_thread *t = arg; |
|
struct pktgen_dev *pkt_dev = NULL; |
|
int cpu = t->cpu; |
|
|
|
WARN_ON(smp_processor_id() != cpu); |
|
|
|
init_waitqueue_head(&t->queue); |
|
complete(&t->start_done); |
|
|
|
pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); |
|
|
|
set_freezable(); |
|
|
|
while (!kthread_should_stop()) { |
|
pkt_dev = next_to_run(t); |
|
|
|
if (unlikely(!pkt_dev && t->control == 0)) { |
|
if (t->net->pktgen_exiting) |
|
break; |
|
wait_event_interruptible_timeout(t->queue, |
|
t->control != 0, |
|
HZ/10); |
|
try_to_freeze(); |
|
continue; |
|
} |
|
|
|
if (likely(pkt_dev)) { |
|
pktgen_xmit(pkt_dev); |
|
|
|
if (need_resched()) |
|
pktgen_resched(pkt_dev); |
|
else |
|
cpu_relax(); |
|
} |
|
|
|
if (t->control & T_STOP) { |
|
pktgen_stop(t); |
|
t->control &= ~(T_STOP); |
|
} |
|
|
|
if (t->control & T_RUN) { |
|
pktgen_run(t); |
|
t->control &= ~(T_RUN); |
|
} |
|
|
|
if (t->control & T_REMDEVALL) { |
|
pktgen_rem_all_ifs(t); |
|
t->control &= ~(T_REMDEVALL); |
|
} |
|
|
|
if (t->control & T_REMDEV) { |
|
pktgen_rem_one_if(t); |
|
t->control &= ~(T_REMDEV); |
|
} |
|
|
|
try_to_freeze(); |
|
} |
|
|
|
pr_debug("%s stopping all device\n", t->tsk->comm); |
|
pktgen_stop(t); |
|
|
|
pr_debug("%s removing all device\n", t->tsk->comm); |
|
pktgen_rem_all_ifs(t); |
|
|
|
pr_debug("%s removing thread\n", t->tsk->comm); |
|
pktgen_rem_thread(t); |
|
|
|
return 0; |
|
} |
|
|
|
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, |
|
const char *ifname, bool exact) |
|
{ |
|
struct pktgen_dev *p, *pkt_dev = NULL; |
|
size_t len = strlen(ifname); |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(p, &t->if_list, list) |
|
if (strncmp(p->odevname, ifname, len) == 0) { |
|
if (p->odevname[len]) { |
|
if (exact || p->odevname[len] != '@') |
|
continue; |
|
} |
|
pkt_dev = p; |
|
break; |
|
} |
|
|
|
rcu_read_unlock(); |
|
pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); |
|
return pkt_dev; |
|
} |
|
|
|
/* |
|
* Adds a dev at front of if_list. |
|
*/ |
|
|
|
static int add_dev_to_thread(struct pktgen_thread *t, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
int rv = 0; |
|
|
|
/* This function cannot be called concurrently, as its called |
|
* under pktgen_thread_lock mutex, but it can run from |
|
* userspace on another CPU than the kthread. The if_lock() |
|
* is used here to sync with concurrent instances of |
|
* _rem_dev_from_if_list() invoked via kthread, which is also |
|
* updating the if_list */ |
|
if_lock(t); |
|
|
|
if (pkt_dev->pg_thread) { |
|
pr_err("ERROR: already assigned to a thread\n"); |
|
rv = -EBUSY; |
|
goto out; |
|
} |
|
|
|
pkt_dev->running = 0; |
|
pkt_dev->pg_thread = t; |
|
list_add_rcu(&pkt_dev->list, &t->if_list); |
|
|
|
out: |
|
if_unlock(t); |
|
return rv; |
|
} |
|
|
|
/* Called under thread lock */ |
|
|
|
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) |
|
{ |
|
struct pktgen_dev *pkt_dev; |
|
int err; |
|
int node = cpu_to_node(t->cpu); |
|
|
|
/* We don't allow a device to be on several threads */ |
|
|
|
pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); |
|
if (pkt_dev) { |
|
pr_err("ERROR: interface already used\n"); |
|
return -EBUSY; |
|
} |
|
|
|
pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); |
|
if (!pkt_dev) |
|
return -ENOMEM; |
|
|
|
strcpy(pkt_dev->odevname, ifname); |
|
pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS, |
|
sizeof(struct flow_state)), |
|
node); |
|
if (pkt_dev->flows == NULL) { |
|
kfree(pkt_dev); |
|
return -ENOMEM; |
|
} |
|
|
|
pkt_dev->removal_mark = 0; |
|
pkt_dev->nfrags = 0; |
|
pkt_dev->delay = pg_delay_d; |
|
pkt_dev->count = pg_count_d; |
|
pkt_dev->sofar = 0; |
|
pkt_dev->udp_src_min = 9; /* sink port */ |
|
pkt_dev->udp_src_max = 9; |
|
pkt_dev->udp_dst_min = 9; |
|
pkt_dev->udp_dst_max = 9; |
|
pkt_dev->vlan_p = 0; |
|
pkt_dev->vlan_cfi = 0; |
|
pkt_dev->vlan_id = 0xffff; |
|
pkt_dev->svlan_p = 0; |
|
pkt_dev->svlan_cfi = 0; |
|
pkt_dev->svlan_id = 0xffff; |
|
pkt_dev->burst = 1; |
|
pkt_dev->node = NUMA_NO_NODE; |
|
|
|
err = pktgen_setup_dev(t->net, pkt_dev, ifname); |
|
if (err) |
|
goto out1; |
|
if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) |
|
pkt_dev->clone_skb = pg_clone_skb_d; |
|
|
|
pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, |
|
&pktgen_if_proc_ops, pkt_dev); |
|
if (!pkt_dev->entry) { |
|
pr_err("cannot create %s/%s procfs entry\n", |
|
PG_PROC_DIR, ifname); |
|
err = -EINVAL; |
|
goto out2; |
|
} |
|
#ifdef CONFIG_XFRM |
|
pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; |
|
pkt_dev->ipsproto = IPPROTO_ESP; |
|
|
|
/* xfrm tunnel mode needs additional dst to extract outter |
|
* ip header protocol/ttl/id field, here creat a phony one. |
|
* instead of looking for a valid rt, which definitely hurting |
|
* performance under such circumstance. |
|
*/ |
|
pkt_dev->dstops.family = AF_INET; |
|
pkt_dev->xdst.u.dst.dev = pkt_dev->odev; |
|
dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false); |
|
pkt_dev->xdst.child = &pkt_dev->xdst.u.dst; |
|
pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops; |
|
#endif |
|
|
|
return add_dev_to_thread(t, pkt_dev); |
|
out2: |
|
dev_put(pkt_dev->odev); |
|
out1: |
|
#ifdef CONFIG_XFRM |
|
free_SAs(pkt_dev); |
|
#endif |
|
vfree(pkt_dev->flows); |
|
kfree(pkt_dev); |
|
return err; |
|
} |
|
|
|
static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) |
|
{ |
|
struct pktgen_thread *t; |
|
struct proc_dir_entry *pe; |
|
struct task_struct *p; |
|
|
|
t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, |
|
cpu_to_node(cpu)); |
|
if (!t) { |
|
pr_err("ERROR: out of memory, can't create new thread\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
mutex_init(&t->if_lock); |
|
t->cpu = cpu; |
|
|
|
INIT_LIST_HEAD(&t->if_list); |
|
|
|
list_add_tail(&t->th_list, &pn->pktgen_threads); |
|
init_completion(&t->start_done); |
|
|
|
p = kthread_create_on_node(pktgen_thread_worker, |
|
t, |
|
cpu_to_node(cpu), |
|
"kpktgend_%d", cpu); |
|
if (IS_ERR(p)) { |
|
pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu); |
|
list_del(&t->th_list); |
|
kfree(t); |
|
return PTR_ERR(p); |
|
} |
|
kthread_bind(p, cpu); |
|
t->tsk = p; |
|
|
|
pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, |
|
&pktgen_thread_proc_ops, t); |
|
if (!pe) { |
|
pr_err("cannot create %s/%s procfs entry\n", |
|
PG_PROC_DIR, t->tsk->comm); |
|
kthread_stop(p); |
|
list_del(&t->th_list); |
|
kfree(t); |
|
return -EINVAL; |
|
} |
|
|
|
t->net = pn; |
|
get_task_struct(p); |
|
wake_up_process(p); |
|
wait_for_completion(&t->start_done); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Removes a device from the thread if_list. |
|
*/ |
|
static void _rem_dev_from_if_list(struct pktgen_thread *t, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
struct list_head *q, *n; |
|
struct pktgen_dev *p; |
|
|
|
if_lock(t); |
|
list_for_each_safe(q, n, &t->if_list) { |
|
p = list_entry(q, struct pktgen_dev, list); |
|
if (p == pkt_dev) |
|
list_del_rcu(&p->list); |
|
} |
|
if_unlock(t); |
|
} |
|
|
|
static int pktgen_remove_device(struct pktgen_thread *t, |
|
struct pktgen_dev *pkt_dev) |
|
{ |
|
pr_debug("remove_device pkt_dev=%p\n", pkt_dev); |
|
|
|
if (pkt_dev->running) { |
|
pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); |
|
pktgen_stop_device(pkt_dev); |
|
} |
|
|
|
/* Dis-associate from the interface */ |
|
|
|
if (pkt_dev->odev) { |
|
dev_put(pkt_dev->odev); |
|
pkt_dev->odev = NULL; |
|
} |
|
|
|
/* Remove proc before if_list entry, because add_device uses |
|
* list to determine if interface already exist, avoid race |
|
* with proc_create_data() */ |
|
proc_remove(pkt_dev->entry); |
|
|
|
/* And update the thread if_list */ |
|
_rem_dev_from_if_list(t, pkt_dev); |
|
|
|
#ifdef CONFIG_XFRM |
|
free_SAs(pkt_dev); |
|
#endif |
|
vfree(pkt_dev->flows); |
|
if (pkt_dev->page) |
|
put_page(pkt_dev->page); |
|
kfree_rcu(pkt_dev, rcu); |
|
return 0; |
|
} |
|
|
|
static int __net_init pg_net_init(struct net *net) |
|
{ |
|
struct pktgen_net *pn = net_generic(net, pg_net_id); |
|
struct proc_dir_entry *pe; |
|
int cpu, ret = 0; |
|
|
|
pn->net = net; |
|
INIT_LIST_HEAD(&pn->pktgen_threads); |
|
pn->pktgen_exiting = false; |
|
pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); |
|
if (!pn->proc_dir) { |
|
pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); |
|
return -ENODEV; |
|
} |
|
pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops); |
|
if (pe == NULL) { |
|
pr_err("cannot create %s procfs entry\n", PGCTRL); |
|
ret = -EINVAL; |
|
goto remove; |
|
} |
|
|
|
for_each_online_cpu(cpu) { |
|
int err; |
|
|
|
err = pktgen_create_thread(cpu, pn); |
|
if (err) |
|
pr_warn("Cannot create thread for cpu %d (%d)\n", |
|
cpu, err); |
|
} |
|
|
|
if (list_empty(&pn->pktgen_threads)) { |
|
pr_err("Initialization failed for all threads\n"); |
|
ret = -ENODEV; |
|
goto remove_entry; |
|
} |
|
|
|
return 0; |
|
|
|
remove_entry: |
|
remove_proc_entry(PGCTRL, pn->proc_dir); |
|
remove: |
|
remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); |
|
return ret; |
|
} |
|
|
|
static void __net_exit pg_net_exit(struct net *net) |
|
{ |
|
struct pktgen_net *pn = net_generic(net, pg_net_id); |
|
struct pktgen_thread *t; |
|
struct list_head *q, *n; |
|
LIST_HEAD(list); |
|
|
|
/* Stop all interfaces & threads */ |
|
pn->pktgen_exiting = true; |
|
|
|
mutex_lock(&pktgen_thread_lock); |
|
list_splice_init(&pn->pktgen_threads, &list); |
|
mutex_unlock(&pktgen_thread_lock); |
|
|
|
list_for_each_safe(q, n, &list) { |
|
t = list_entry(q, struct pktgen_thread, th_list); |
|
list_del(&t->th_list); |
|
kthread_stop(t->tsk); |
|
put_task_struct(t->tsk); |
|
kfree(t); |
|
} |
|
|
|
remove_proc_entry(PGCTRL, pn->proc_dir); |
|
remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); |
|
} |
|
|
|
static struct pernet_operations pg_net_ops = { |
|
.init = pg_net_init, |
|
.exit = pg_net_exit, |
|
.id = &pg_net_id, |
|
.size = sizeof(struct pktgen_net), |
|
}; |
|
|
|
static int __init pg_init(void) |
|
{ |
|
int ret = 0; |
|
|
|
pr_info("%s", version); |
|
ret = register_pernet_subsys(&pg_net_ops); |
|
if (ret) |
|
return ret; |
|
ret = register_netdevice_notifier(&pktgen_notifier_block); |
|
if (ret) |
|
unregister_pernet_subsys(&pg_net_ops); |
|
|
|
return ret; |
|
} |
|
|
|
static void __exit pg_cleanup(void) |
|
{ |
|
unregister_netdevice_notifier(&pktgen_notifier_block); |
|
unregister_pernet_subsys(&pg_net_ops); |
|
/* Don't need rcu_barrier() due to use of kfree_rcu() */ |
|
} |
|
|
|
module_init(pg_init); |
|
module_exit(pg_cleanup); |
|
|
|
MODULE_AUTHOR("Robert Olsson <[email protected]>"); |
|
MODULE_DESCRIPTION("Packet Generator tool"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_VERSION(VERSION); |
|
module_param(pg_count_d, int, 0); |
|
MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); |
|
module_param(pg_delay_d, int, 0); |
|
MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); |
|
module_param(pg_clone_skb_d, int, 0); |
|
MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); |
|
module_param(debug, int, 0); |
|
MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
|
|
|