X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fcore%2Fpktgen.c;h=c57b06bc79f379cb63dbc00dcd9c0860a09a3800;hb=f7f1b0f1e2fbadeab12d24236000e778aa9b1ead;hp=1d1c5451f3035230a206f0f593fa18236a43ad93;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git diff --git a/net/core/pktgen.c b/net/core/pktgen.c index 1d1c5451f..c57b06bc7 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -1,13 +1,22 @@ -/* -*-linux-c-*- - * $Id: pktgen.c,v 1.8 2002/07/15 19:30:17 robert Exp $ - * pktgen.c: Packet Generator for performance evaluation. - * +/* + * Authors: * Copyright 2001, 2002 by Robert Olsson - * Uppsala University, Sweden + * Uppsala University and + * Swedish University of Agricultural Sciences + * + * Alexey Kuznetsov + * Ben Greear + * Jens Låås + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * * * A tool for loading the network with preconfigurated packets. * The tool is implemented as a linux module. Parameters are output - * device, IPG (interpacket gap), number of packets, and whether + * device, delay (to hard_xmit), number of packets, and whether * to use multiple SKBs or just the same one. * pktgen uses the installed interface's output routine. * @@ -21,861 +30,702 @@ * Added multiskb option 020301 --DaveM * Scaling of results. 020417--sigurdur@linpro.no * Significant re-work of the module: - * * Updated to support generation over multiple interfaces at once - * by creating 32 /proc/net/pg* files. Each file can be manipulated - * individually. + * * Convert to threaded model to more efficiently be able to transmit + * and receive on multiple interfaces at once. * * Converted many counters to __u64 to allow longer runs. * * Allow configuration of ranges, like min/max IP address, MACs, * and UDP-ports, for both source and destination, and can * set to use a random distribution or sequentially walk the range. - * * Can now change some values after starting. + * * Can now change most values after starting. * * Place 12-byte packet in UDP payload with magic number, - * sequence number, and timestamp. Will write receiver next. - * * The new changes seem to have a performance impact of around 1%, - * as far as I can tell. + * sequence number, and timestamp. + * * Add receiver code that detects dropped pkts, re-ordered pkts, and + * latencies (with micro-second) precision. + * * Add IOCTL interface to easily get counters & configuration. * --Ben Greear - * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) * * Renamed multiskb to clone_skb and cleaned up sending core for two distinct * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 * as a "fastpath" with a configurable number of clones after alloc's. - * * clone_skb=0 means all packets are allocated this also means ranges time * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 * clones. * * Also moved to /proc/net/pktgen/ - * --ro + * --ro + * + * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever + * mistakes. Also merged in DaveM's patch in the -pre6 patch. + * --Ben Greear + * + * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) + * + * + * 021124 Finished major redesign and rewrite for new functionality. + * See Documentation/networking/pktgen.txt for how to use this. + * + * The new operation: + * For each CPU one thread/process is created at start. This process checks + * for running devices in the if_list and sends packets until count is 0 it + * also the thread checks the thread->control which is used for inter-process + * communication. controlling process "posts" operations to the threads this + * way. The if_lock should be possible to remove when add/rem_device is merged + * into this too. + * + * By design there should only be *one* "controlling" process. In practice + * multiple write accesses gives unpredictable result. Understood by "write" + * to /proc gives result code thats should be read be the "writer". + * For pratical use this should be no problem. + * + * Note when adding devices to a specific CPU there good idea to also assign + * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. + * --ro * * Fix refcount off by one if first packet fails, potential null deref, * memleak 030710- KJP * + * First "ranges" functionality for ipv6 030726 --ro + * + * Included flow support. 030802 ANK. + * * Fixed unaligned access on IA-64 Grant Grundler + * + * Remove if fix from added Harald Welte 040419 + * ia64 compilation fix from Aron Griffis 040604 * * New xmit() return, do_div and misc clean up by Stephen Hemminger * 040923 * - * See Documentation/networking/pktgen.txt for how to use this. + * Rany Dunlap fixed u64 printk compiler waring + * + * Remove FCS from BW calculation. Lennert Buytenhek + * New time handling. Lennert Buytenhek 041213 + * + * Corrections from Nikolai Malykh (nmalykh@bilim.com) + * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 + * + * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan + * 050103 */ - +#include +#include #include #include #include +#include #include -#include +#include +#include +#include +#include #include #include #include #include -#include #include -#include #include +#include #include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include #include #include +#include #include #include -#include #include +#include +#include +#include +#include +#include +#include #include +#include +#include +#include +#include +#include +#include +#include +#include +#include /* do_div */ #include -#define cycles() ((u32)get_cycles()) - - -#define VERSION "pktgen version 1.32" -static char version[] __initdata = - "pktgen.c: v1.4: Packet Generator for packet performance testing.\n"; - -/* Used to help with determining the pkts on receive */ - -#define PKTGEN_MAGIC 0xbe9be955 +#define VERSION "pktgen v2.61: Packet Generator for packet performance testing.\n" -/* Keep information per interface */ -struct pktgen_info { - /* Parameters */ +/* #define PG_DEBUG(a) a */ +#define PG_DEBUG(a) - /* If min != max, then we will either do a linear iteration, or - * we will do a random selection from within the range. - */ - __u32 flags; +/* The buckets are exponential in 'width' */ +#define LAT_BUCKETS_MAX 32 +#define IP_NAME_SZ 32 +/* Device flag bits */ #define F_IPSRC_RND (1<<0) /* IP-Src Random */ #define F_IPDST_RND (1<<1) /* IP-Dst Random */ #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ -#define F_SET_SRCMAC (1<<6) /* Specify-Src-Mac - (default is to use Interface's MAC Addr) */ -#define F_SET_SRCIP (1<<7) /* Specify-Src-IP - (default is to use Interface's IP Addr) */ +#define F_TXSIZE_RND (1<<6) /* Transmit size is random */ +#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ - - int pkt_size; /* = ETH_ZLEN; */ - int nfrags; - __u32 ipg; /* Default Interpacket gap in nsec */ - __u64 count; /* Default No packets to send */ - __u64 sofar; /* How many pkts we've sent so far */ - __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ - struct timeval started_at; - struct timeval stopped_at; - __u64 idle_acc; - __u32 seq_num; - - int clone_skb; /* Use multiple SKBs during packet gen. If this number - * is greater than 1, then that many coppies of the same - * packet will be sent before a new packet is allocated. - * For instance, if you want to send 1024 identical packets - * before creating a new packet, set clone_skb to 1024. - */ - int busy; - int do_run_run; /* if this changes to false, the test will stop */ - - char outdev[32]; - char dst_min[32]; - char dst_max[32]; - char src_min[32]; - char src_max[32]; - - /* If we're doing ranges, random or incremental, then this - * defines the min/max for those ranges. +/* Thread control flag bits */ +#define T_TERMINATE (1<<0) +#define T_STOP (1<<1) /* Stop run */ +#define T_RUN (1<<2) /* Start run */ +#define T_REMDEV (1<<3) /* Remove all devs */ + +/* Locks */ +#define thread_lock() spin_lock(&_thread_lock) +#define thread_unlock() spin_unlock(&_thread_lock) + +/* If lock -- can be removed after some work */ +#define if_lock(t) spin_lock(&(t->if_lock)); +#define if_unlock(t) spin_unlock(&(t->if_lock)); + +/* Used to help with determining the pkts on receive */ +#define PKTGEN_MAGIC 0xbe9be955 +#define PG_PROC_DIR "pktgen" + +#define MAX_CFLOWS 65536 + +struct flow_state +{ + __u32 cur_daddr; + int count; +}; + +struct pktgen_dev { + + /* + * Try to keep frequent/infrequent used vars. separated. */ - __u32 saddr_min; /* inclusive, source IP address */ - __u32 saddr_max; /* exclusive, source IP address */ - __u32 daddr_min; /* inclusive, dest IP address */ - __u32 daddr_max; /* exclusive, dest IP address */ - - __u16 udp_src_min; /* inclusive, source UDP port */ - __u16 udp_src_max; /* exclusive, source UDP port */ - __u16 udp_dst_min; /* inclusive, dest UDP port */ - __u16 udp_dst_max; /* exclusive, dest UDP port */ - - __u32 src_mac_count; /* How many MACs to iterate through */ - __u32 dst_mac_count; /* How many MACs to iterate through */ - - unsigned char dst_mac[6]; - unsigned char src_mac[6]; - - __u32 cur_dst_mac_offset; - __u32 cur_src_mac_offset; - __u32 cur_saddr; - __u32 cur_daddr; - __u16 cur_udp_dst; - __u16 cur_udp_src; - - __u8 hh[14]; - /* = { - 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, - - We fill in SRC address later - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x08, 0x00 - }; - */ - __u16 pad; /* pad out the hh struct to an even 16 bytes */ - char result[512]; - - /* proc file names */ - char fname[80]; - char busy_fname[80]; - - struct proc_dir_entry *proc_ent; - struct proc_dir_entry *busy_proc_ent; + + char ifname[32]; + struct proc_dir_entry *proc_ent; + char result[512]; + /* proc file names */ + char fname[80]; + + struct pktgen_thread* pg_thread; /* the owner */ + struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */ + + int running; /* if this changes to false, the test will stop */ + + /* If min != max, then we will either do a linear iteration, or + * we will do a random selection from within the range. + */ + __u32 flags; + + int min_pkt_size; /* = ETH_ZLEN; */ + int max_pkt_size; /* = ETH_ZLEN; */ + int nfrags; + __u32 delay_us; /* Default delay */ + __u32 delay_ns; + __u64 count; /* Default No packets to send */ + __u64 sofar; /* How many pkts we've sent so far */ + __u64 tx_bytes; /* How many bytes we've transmitted */ + __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ + + /* runtime counters relating to clone_skb */ + __u64 next_tx_us; /* timestamp of when to tx next */ + __u32 next_tx_ns; + + __u64 allocated_skbs; + __u32 clone_count; + int last_ok; /* Was last skb sent? + * Or a failed transmit of some sort? This will keep + * sequence numbers in order, for example. + */ + __u64 started_at; /* micro-seconds */ + __u64 stopped_at; /* micro-seconds */ + __u64 idle_acc; /* micro-seconds */ + __u32 seq_num; + + int clone_skb; /* Use multiple SKBs during packet gen. If this number + * is greater than 1, then that many coppies of the same + * packet will be sent before a new packet is allocated. + * For instance, if you want to send 1024 identical packets + * before creating a new packet, set clone_skb to 1024. + */ + + char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + + struct in6_addr in6_saddr; + struct in6_addr in6_daddr; + struct in6_addr cur_in6_daddr; + struct in6_addr cur_in6_saddr; + /* For ranges */ + struct in6_addr min_in6_daddr; + struct in6_addr max_in6_daddr; + struct in6_addr min_in6_saddr; + struct in6_addr max_in6_saddr; + + /* If we're doing ranges, random or incremental, then this + * defines the min/max for those ranges. + */ + __u32 saddr_min; /* inclusive, source IP address */ + __u32 saddr_max; /* exclusive, source IP address */ + __u32 daddr_min; /* inclusive, dest IP address */ + __u32 daddr_max; /* exclusive, dest IP address */ + + __u16 udp_src_min; /* inclusive, source UDP port */ + __u16 udp_src_max; /* exclusive, source UDP port */ + __u16 udp_dst_min; /* inclusive, dest UDP port */ + __u16 udp_dst_max; /* exclusive, dest UDP port */ + + __u32 src_mac_count; /* How many MACs to iterate through */ + __u32 dst_mac_count; /* How many MACs to iterate through */ + + unsigned char dst_mac[6]; + unsigned char src_mac[6]; + + __u32 cur_dst_mac_offset; + __u32 cur_src_mac_offset; + __u32 cur_saddr; + __u32 cur_daddr; + __u16 cur_udp_dst; + __u16 cur_udp_src; + __u32 cur_pkt_size; + + __u8 hh[14]; + /* = { + 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, + + We fill in SRC address later + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x08, 0x00 + }; + */ + __u16 pad; /* pad out the hh struct to an even 16 bytes */ + + struct sk_buff* skb; /* skb we are to transmit next, mainly used for when we + * are transmitting the same one multiple times + */ + struct net_device* odev; /* The out-going device. Note that the device should + * have it's pg_info pointer pointing back to this + * device. This will be set when the user specifies + * the out-going device name (not when the inject is + * started as it used to do.) + */ + struct flow_state *flows; + unsigned cflows; /* Concurrent flows (config) */ + unsigned lflow; /* Flow length (config) */ + unsigned nflows; /* accumulated flows (stats) */ }; struct pktgen_hdr { - __u32 pgh_magic; - __u32 seq_num; + __u32 pgh_magic; + __u32 seq_num; __u32 tv_sec; __u32 tv_usec; }; -static int cpu_speed; -static int debug; - -/* Module parameters, defaults. */ -static int count_d = 100000; -static int ipg_d; -static int clone_skb_d; - +struct pktgen_thread { + spinlock_t if_lock; + struct pktgen_dev *if_list; /* All device here */ + struct pktgen_thread* next; + char name[32]; + char fname[128]; /* name of proc file */ + struct proc_dir_entry *proc_ent; + char result[512]; + u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */ + + /* Field for thread to receive "posted" events terminate, stop ifs etc.*/ + + u32 control; + int pid; + int cpu; + + wait_queue_head_t queue; +}; -#define MAX_PKTGEN 8 -static struct pktgen_info pginfos[MAX_PKTGEN]; +#define REMOVE 1 +#define FIND 0 +/* This code works around the fact that do_div cannot handle two 64-bit + numbers, and regular 64-bit division doesn't work on x86 kernels. + --Ben +*/ -/** Convert to miliseconds */ -static inline __u64 tv_to_ms(const struct timeval* tv) { - __u64 ms = tv->tv_usec / 1000; - ms += (__u64)tv->tv_sec * (__u64)1000; - return ms; -} +#define PG_DIV 0 -static inline __u64 getCurMs(void) { - struct timeval tv; - do_gettimeofday(&tv); - return tv_to_ms(&tv); +/* This was emailed to LMKL by: Chris Caputo + * Function copied/adapted/optimized from: + * + * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html + * + * Copyright 1994, University of Cambridge Computer Laboratory + * All Rights Reserved. + * + */ +inline static s64 divremdi3(s64 x, s64 y, int type) +{ + u64 a = (x < 0) ? -x : x; + u64 b = (y < 0) ? -y : y; + u64 res = 0, d = 1; + + if (b > 0) { + while (b < a) { + b <<= 1; + d <<= 1; + } + } + + do { + if ( a >= b ) { + a -= b; + res += d; + } + b >>= 1; + d >>= 1; + } + while (d); + + if (PG_DIV == type) { + return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res; + } + else { + return ((x & (1ll<<63)) == 0) ? a : -(s64)a; + } } -#define PG_PROC_DIR "pktgen" -static struct proc_dir_entry *proc_dir; +/* End of hacks to deal with 64-bit math on x86 */ -static struct net_device *setup_inject(struct pktgen_info* info) +/** Convert to miliseconds */ +static inline __u64 tv_to_ms(const struct timeval* tv) { - struct net_device *odev; - - odev = dev_get_by_name(info->outdev); - if (!odev) { - sprintf(info->result, "No such netdevice: \"%s\"", info->outdev); - goto out; - } - - if (odev->type != ARPHRD_ETHER) { - sprintf(info->result, "Not ethernet device: \"%s\"", info->outdev); - goto out_put; - } - - if (!netif_running(odev)) { - sprintf(info->result, "Device is down: \"%s\"", info->outdev); - goto out_put; - } - - /* Default to the interface's mac if not explicitly set. */ - if (!(info->flags & F_SET_SRCMAC)) { - memcpy(&(info->hh[6]), odev->dev_addr, 6); - } - else { - memcpy(&(info->hh[6]), info->src_mac, 6); - } - - /* Set up Dest MAC */ - memcpy(&(info->hh[0]), info->dst_mac, 6); - - info->saddr_min = 0; - info->saddr_max = 0; - if (strlen(info->src_min) == 0) { - struct in_device *in_dev; - - rcu_read_lock(); - in_dev = __in_dev_get(odev); - if (in_dev) { - if (in_dev->ifa_list) { - info->saddr_min = in_dev->ifa_list->ifa_address; - info->saddr_max = info->saddr_min; - } - } - rcu_read_unlock(); - } - else { - info->saddr_min = in_aton(info->src_min); - info->saddr_max = in_aton(info->src_max); - } + __u64 ms = tv->tv_usec / 1000; + ms += (__u64)tv->tv_sec * (__u64)1000; + return ms; +} - info->daddr_min = in_aton(info->dst_min); - info->daddr_max = in_aton(info->dst_max); - /* Initialize current values. */ - info->cur_dst_mac_offset = 0; - info->cur_src_mac_offset = 0; - info->cur_saddr = info->saddr_min; - info->cur_daddr = info->daddr_min; - info->cur_udp_dst = info->udp_dst_min; - info->cur_udp_src = info->udp_src_min; - - return odev; +/** Convert to micro-seconds */ +static inline __u64 tv_to_us(const struct timeval* tv) +{ + __u64 us = tv->tv_usec; + us += (__u64)tv->tv_sec * (__u64)1000000; + return us; +} -out_put: - dev_put(odev); -out: - return NULL; +static inline __u64 pg_div(__u64 n, __u32 base) { + __u64 tmp = n; + do_div(tmp, base); + /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n", + n, base, tmp); */ + return tmp; } -static void nanospin(int ipg, struct pktgen_info* info) +static inline __u64 pg_div64(__u64 n, __u64 base) { - u32 idle_start, idle; - - idle_start = cycles(); + __u64 tmp = n; +/* + * How do we know if the architectrure we are running on + * supports division with 64 bit base? + * + */ +#if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__) - for (;;) { - barrier(); - idle = cycles() - idle_start; - if (idle * 1000 >= ipg * cpu_speed) - break; - } - info->idle_acc += idle; + do_div(tmp, base); +#else + tmp = divremdi3(n, base, PG_DIV); +#endif + return tmp; } -static int calc_mhz(void) +static inline u32 pktgen_random(void) { - struct timeval start, stop; - u32 start_s, elapsed; - - do_gettimeofday(&start); - start_s = cycles(); - do { - barrier(); - elapsed = cycles() - start_s; - if (elapsed == 0) - return 0; - } while (elapsed < 1000 * 50000); - do_gettimeofday(&stop); - return elapsed/(stop.tv_usec-start.tv_usec+1000000*(stop.tv_sec-start.tv_sec)); +#if 0 + __u32 n; + get_random_bytes(&n, 4); + return n; +#else + return net_random(); +#endif } -static void cycles_calibrate(void) +static inline __u64 getCurMs(void) { - int i; - - for (i = 0; i < 3; i++) { - int res = calc_mhz(); - if (res > cpu_speed) - cpu_speed = res; - } + struct timeval tv; + do_gettimeofday(&tv); + return tv_to_ms(&tv); } +static inline __u64 getCurUs(void) +{ + struct timeval tv; + do_gettimeofday(&tv); + return tv_to_us(&tv); +} -/* 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_info* info) { - __u32 imn; - __u32 imx; - - /* Deal with source MAC */ - if (info->src_mac_count > 1) { - __u32 mc; - __u32 tmp; - if (info->flags & F_MACSRC_RND) { - mc = net_random() % (info->src_mac_count); - } - else { - mc = info->cur_src_mac_offset++; - if (info->cur_src_mac_offset > info->src_mac_count) { - info->cur_src_mac_offset = 0; - } - } - - tmp = info->src_mac[5] + (mc & 0xFF); - info->hh[11] = tmp; - tmp = (info->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); - info->hh[10] = tmp; - tmp = (info->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); - info->hh[9] = tmp; - tmp = (info->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); - info->hh[8] = tmp; - tmp = (info->src_mac[1] + (tmp >> 8)); - info->hh[7] = tmp; - } - - /* Deal with Destination MAC */ - if (info->dst_mac_count > 1) { - __u32 mc; - __u32 tmp; - if (info->flags & F_MACDST_RND) { - mc = net_random() % (info->dst_mac_count); - } - else { - mc = info->cur_dst_mac_offset++; - if (info->cur_dst_mac_offset > info->dst_mac_count) { - info->cur_dst_mac_offset = 0; - } - } +static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b) +{ + return tv_to_us(a) - tv_to_us(b); +} - tmp = info->dst_mac[5] + (mc & 0xFF); - info->hh[5] = tmp; - tmp = (info->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); - info->hh[4] = tmp; - tmp = (info->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); - info->hh[3] = tmp; - tmp = (info->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); - info->hh[2] = tmp; - tmp = (info->dst_mac[1] + (tmp >> 8)); - info->hh[1] = tmp; - } - - if (info->udp_src_min < info->udp_src_max) { - if (info->flags & F_UDPSRC_RND) { - info->cur_udp_src = ((net_random() % (info->udp_src_max - info->udp_src_min)) - + info->udp_src_min); - } - else { - info->cur_udp_src++; - if (info->cur_udp_src >= info->udp_src_max) { - info->cur_udp_src = info->udp_src_min; - } - } - } - if (info->udp_dst_min < info->udp_dst_max) { - if (info->flags & F_UDPDST_RND) { - info->cur_udp_dst = ((net_random() % (info->udp_dst_max - info->udp_dst_min)) - + info->udp_dst_min); - } - else { - info->cur_udp_dst++; - if (info->cur_udp_dst >= info->udp_dst_max) { - info->cur_udp_dst = info->udp_dst_min; - } - } - } +/* old include end */ - if ((imn = ntohl(info->saddr_min)) < (imx = ntohl(info->saddr_max))) { - __u32 t; - if (info->flags & F_IPSRC_RND) { - t = ((net_random() % (imx - imn)) + imn); - } - else { - t = ntohl(info->cur_saddr); - t++; - if (t >= imx) { - t = imn; - } - } - info->cur_saddr = htonl(t); - } +static char version[] __initdata = VERSION; - if ((imn = ntohl(info->daddr_min)) < (imx = ntohl(info->daddr_max))) { - __u32 t; - if (info->flags & F_IPDST_RND) { - t = ((net_random() % (imx - imn)) + imn); - } - else { - t = ntohl(info->cur_daddr); - t++; - if (t >= imx) { - t = imn; - } - } - info->cur_daddr = htonl(t); - } -}/* mod_cur_headers */ +static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, size_t count, loff_t *ppos); +static ssize_t proc_pgctrl_write(struct file* file, const char __user * buf, size_t count, loff_t *ppos); +static int proc_if_read(char *buf , char **start, off_t offset, int len, int *eof, void *data); +static int proc_thread_read(char *buf , char **start, off_t offset, int len, int *eof, void *data); +static int proc_if_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data); +static int proc_thread_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data); +static int create_proc_dir(void); +static int remove_proc_dir(void); -static struct sk_buff *fill_packet(struct net_device *odev, struct pktgen_info* info) -{ - struct sk_buff *skb = NULL; - __u8 *eth; - struct udphdr *udph; - int datalen, iplen; - struct iphdr *iph; - struct pktgen_hdr *pgh = NULL; - - skb = alloc_skb(info->pkt_size + 64 + 16, GFP_ATOMIC); - if (!skb) { - sprintf(info->result, "No memory"); - return NULL; - } +static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i); +static int pktgen_add_device(struct pktgen_thread* t, const char* ifname); +static struct pktgen_thread* pktgen_find_thread(const char* name); +static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname); +static int pktgen_device_event(struct notifier_block *, unsigned long, void *); +static void pktgen_run_all_threads(void); +static void pktgen_stop_all_threads_ifs(void); +static int pktgen_stop_device(struct pktgen_dev *pkt_dev); +static void pktgen_stop(struct pktgen_thread* t); +static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); +static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove); +static unsigned int scan_ip6(const char *s,char ip[16]); +static unsigned int fmt_ip6(char *s,const char ip[16]); - skb_reserve(skb, 16); +/* Module parameters, defaults. */ +static int pg_count_d = 1000; /* 1000 pkts by default */ +static int pg_delay_d = 0; +static int pg_clone_skb_d = 0; +static int debug = 0; - /* Reserve for ethernet and IP header */ - eth = (__u8 *) skb_push(skb, 14); - iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr)); - udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); +static spinlock_t _thread_lock = SPIN_LOCK_UNLOCKED; +static struct pktgen_thread *pktgen_threads = NULL; - /* Update any of the values, used when we're incrementing various - * fields. - */ - mod_cur_headers(info); +static char module_fname[128]; +static struct proc_dir_entry *module_proc_ent = NULL; - memcpy(eth, info->hh, 14); - - datalen = info->pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */ - if (datalen < sizeof(struct pktgen_hdr)) { - datalen = sizeof(struct pktgen_hdr); - } - - udph->source = htons(info->cur_udp_src); - udph->dest = htons(info->cur_udp_dst); - udph->len = htons(datalen + 8); /* DATA + udphdr */ - udph->check = 0; /* No checksum */ +static struct notifier_block pktgen_notifier_block = { + .notifier_call = pktgen_device_event, +}; - iph->ihl = 5; - iph->version = 4; - iph->ttl = 3; - iph->tos = 0; - iph->protocol = IPPROTO_UDP; /* UDP */ - iph->saddr = info->cur_saddr; - iph->daddr = info->cur_daddr; - iph->frag_off = 0; - iplen = 20 + 8 + datalen; - iph->tot_len = htons(iplen); - iph->check = 0; - iph->check = ip_fast_csum((void *) iph, iph->ihl); - skb->protocol = __constant_htons(ETH_P_IP); - skb->mac.raw = ((u8 *)iph) - 14; - skb->dev = odev; - skb->pkt_type = PACKET_HOST; +static struct file_operations pktgen_fops = { + .read = proc_pgctrl_read, + .write = proc_pgctrl_write, + /* .ioctl = pktgen_ioctl, later maybe */ +}; - if (info->nfrags <= 0) { - pgh = (struct pktgen_hdr *)skb_put(skb, datalen); - } else { - int frags = info->nfrags; - int i; +/* + * /proc handling functions + * + */ - /* TODO: Verify this is OK...it sure is ugly. --Ben */ - pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); - - if (frags > MAX_SKB_FRAGS) - frags = MAX_SKB_FRAGS; - if (datalen > frags*PAGE_SIZE) { - skb_put(skb, datalen-frags*PAGE_SIZE); - datalen = frags*PAGE_SIZE; - } +static struct proc_dir_entry *pg_proc_dir = NULL; +static int proc_pgctrl_read_eof=0; - i = 0; - while (datalen > 0) { - struct page *page = alloc_pages(GFP_KERNEL, 0); - skb_shinfo(skb)->frags[i].page = page; - skb_shinfo(skb)->frags[i].page_offset = 0; - skb_shinfo(skb)->frags[i].size = - (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); - datalen -= skb_shinfo(skb)->frags[i].size; - skb->len += skb_shinfo(skb)->frags[i].size; - skb->data_len += skb_shinfo(skb)->frags[i].size; - i++; - skb_shinfo(skb)->nr_frags = i; - } +static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, + size_t count, loff_t *ppos) +{ + char data[200]; + int len = 0; - while (i < frags) { - int rem; + if(proc_pgctrl_read_eof) { + proc_pgctrl_read_eof=0; + len = 0; + goto out; + } - if (i == 0) - break; + sprintf(data, "%s", VERSION); - rem = skb_shinfo(skb)->frags[i - 1].size / 2; - if (rem == 0) - break; + len = strlen(data); - skb_shinfo(skb)->frags[i - 1].size -= rem; + if(len > count) { + len =-EFAULT; + goto out; + } - skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; - get_page(skb_shinfo(skb)->frags[i].page); - skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; - skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; - skb_shinfo(skb)->frags[i].size = rem; - i++; - skb_shinfo(skb)->nr_frags = i; - } - } + if (copy_to_user(buf, data, len)) { + len =-EFAULT; + goto out; + } - /* Stamp the time, and sequence number, convert them to network byte order */ - if (pgh) { - struct timeval timestamp; + *ppos += len; + proc_pgctrl_read_eof=1; /* EOF next call */ - pgh->pgh_magic = htonl(PKTGEN_MAGIC); - pgh->seq_num = htonl(info->seq_num); - - do_gettimeofday(×tamp); - pgh->tv_sec = htonl(timestamp.tv_sec); - pgh->tv_usec = htonl(timestamp.tv_usec); - } - - return skb; + out: + return len; } -static void show_results(struct pktgen_info* info, int nr_frags) +static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf, + size_t count, loff_t *ppos) { - __u64 total, bps, mbps, pps; - unsigned long idle; - int size = info->pkt_size + 4; /* incl 32bit ethernet CRC */ - char *p = info->result; + char *data = NULL; + int err = 0; - total = (info->stopped_at.tv_sec - info->started_at.tv_sec) * 1000000ull - + info->stopped_at.tv_usec - info->started_at.tv_usec; + if (!capable(CAP_NET_ADMIN)){ + err = -EPERM; + goto out; + } - BUG_ON(cpu_speed == 0); + data = (void*)vmalloc ((unsigned int)count); - idle = info->idle_acc; - do_div(idle, cpu_speed); + if(!data) { + err = -ENOMEM; + goto out; + } + if (copy_from_user(data, buf, count)) { + err =-EFAULT; + goto out_free; + } + data[count-1] = 0; /* Make string */ - p += sprintf(p, "OK: %llu(c%llu+d%lu) usec, %llu (%dbyte,%dfrags)\n", - total, total - idle, idle, - info->sofar, size, nr_frags); + if (!strcmp(data, "stop")) + pktgen_stop_all_threads_ifs(); - pps = info->sofar * USEC_PER_SEC; - - while ((total >> 32) != 0) { - pps >>= 1; - total >>= 1; - } + else if (!strcmp(data, "start")) + pktgen_run_all_threads(); - do_div(pps, total); - - bps = pps * 8 * size; + else + printk("pktgen: Unknown command: %s\n", data); - mbps = bps; - do_div(mbps, 1000000); - p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", - pps, mbps, bps, info->errors); + err = count; + + out_free: + vfree (data); + out: + return err; } -static void inject(struct pktgen_info* info) +static int proc_if_read(char *buf , char **start, off_t offset, + int len, int *eof, void *data) { - struct net_device *odev; - struct sk_buff *skb = NULL; - __u64 lcount = 0; - int ret; - int last_ok = 1; /* Was last skb sent? - * Or a failed transmit of some sort? This will keep - * sequence numbers in order, for example. - */ - __u64 fp = 0; - __u32 fp_tmp = 0; - - odev = setup_inject(info); - if (!odev) - return; - - info->do_run_run = 1; /* Cranke yeself! */ - info->idle_acc = 0; - info->sofar = 0; - lcount = info->count; - - - /* Build our initial pkt and place it as a re-try pkt. */ - skb = fill_packet(odev, info); - if (skb == NULL) goto out_reldev; - - do_gettimeofday(&(info->started_at)); - - while(info->do_run_run) { - - /* Set a time-stamp, so build a new pkt each time */ - - if (last_ok) { - if (++fp_tmp >= info->clone_skb ) { - kfree_skb(skb); - skb = fill_packet(odev, info); - if (skb == NULL) { - goto out_reldev; - } - fp++; - fp_tmp = 0; /* reset counter */ - } - } - - if (!(odev->features & NETIF_F_LLTX)) - spin_lock_bh(&odev->xmit_lock); - if (!netif_queue_stopped(odev)) { - - atomic_inc(&skb->users); - - retry: - ret = odev->hard_start_xmit(skb, odev); - if (likely(ret == NETDEV_TX_OK)) { - last_ok = 1; - info->sofar++; - info->seq_num++; - } else if (ret == NETDEV_TX_LOCKED - && (odev->features & NETIF_F_LLTX)) { - cpu_relax(); - goto retry; - } else { - atomic_dec(&skb->users); - if (debug && net_ratelimit()) { - printk(KERN_INFO "Hard xmit error\n"); - } - info->errors++; - last_ok = 0; - } - } - else { - /* Re-try it next time */ - last_ok = 0; - } - - if (!(odev->features & NETIF_F_LLTX)) - spin_unlock_bh(&odev->xmit_lock); - - if (info->ipg) { - /* Try not to busy-spin if we have larger sleep times. - * TODO: Investigate better ways to do this. - */ - if (info->ipg < 10000) { /* 10 usecs or less */ - nanospin(info->ipg, info); - } - else if (info->ipg < 10000000) { /* 10ms or less */ - udelay(info->ipg / 1000); - } - else { - mdelay(info->ipg / 1000000); - } - } - - if (signal_pending(current)) { - break; - } - - /* If lcount is zero, then run forever */ - if ((lcount != 0) && (--lcount == 0)) { - if (atomic_read(&skb->users) != 1) { - u32 idle_start, idle; - - idle_start = cycles(); - while (atomic_read(&skb->users) != 1) { - if (signal_pending(current)) { - break; - } - schedule(); - } - idle = cycles() - idle_start; - info->idle_acc += idle; - } - break; - } - - if (netif_queue_stopped(odev) || need_resched()) { - u32 idle_start, idle; - - idle_start = cycles(); - do { - if (signal_pending(current)) { - info->do_run_run = 0; - break; - } - if (!netif_running(odev)) { - info->do_run_run = 0; - break; - } - if (need_resched()) - schedule(); - else - do_softirq(); - } while (netif_queue_stopped(odev)); - idle = cycles() - idle_start; - info->idle_acc += idle; - } - }/* while we should be running */ - - do_gettimeofday(&(info->stopped_at)); - - show_results(info, skb_shinfo(skb)->nr_frags); - - kfree_skb(skb); + char *p; + int i; + struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data); + __u64 sa; + __u64 stopped; + __u64 now = getCurUs(); + + p = buf; + p += sprintf(p, "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); + + p += sprintf(p, " frags: %d delay: %u clone_skb: %d ifname: %s\n", + pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname); + + p += sprintf(p, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow); + + + if(pkt_dev->flags & F_IPV6) { + char b1[128], b2[128], b3[128]; + fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); + fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); + fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); + p += sprintf(p, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3); + + fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); + fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); + fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); + p += sprintf(p, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3); + + } + else + p += sprintf(p, " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", + pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max); + + p += sprintf(p, " src_mac: "); + + if ((pkt_dev->src_mac[0] == 0) && + (pkt_dev->src_mac[1] == 0) && + (pkt_dev->src_mac[2] == 0) && + (pkt_dev->src_mac[3] == 0) && + (pkt_dev->src_mac[4] == 0) && + (pkt_dev->src_mac[5] == 0)) + + for (i = 0; i < 6; i++) + p += sprintf(p, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":"); + + else + for (i = 0; i < 6; i++) + p += sprintf(p, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":"); + + p += sprintf(p, "dst_mac: "); + for (i = 0; i < 6; i++) + p += sprintf(p, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":"); + + p += sprintf(p, " 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); + + p += sprintf(p, " src_mac_count: %d dst_mac_count: %d \n Flags: ", + pkt_dev->src_mac_count, pkt_dev->dst_mac_count); + + + if (pkt_dev->flags & F_IPV6) + p += sprintf(p, "IPV6 "); + + if (pkt_dev->flags & F_IPSRC_RND) + p += sprintf(p, "IPSRC_RND "); + + if (pkt_dev->flags & F_IPDST_RND) + p += sprintf(p, "IPDST_RND "); + + if (pkt_dev->flags & F_TXSIZE_RND) + p += sprintf(p, "TXSIZE_RND "); + + if (pkt_dev->flags & F_UDPSRC_RND) + p += sprintf(p, "UDPSRC_RND "); + + if (pkt_dev->flags & F_UDPDST_RND) + p += sprintf(p, "UDPDST_RND "); + + if (pkt_dev->flags & F_MACSRC_RND) + p += sprintf(p, "MACSRC_RND "); + + if (pkt_dev->flags & F_MACDST_RND) + p += sprintf(p, "MACDST_RND "); + + + p += sprintf(p, "\n"); + + sa = pkt_dev->started_at; + stopped = pkt_dev->stopped_at; + if (pkt_dev->running) + stopped = now; /* not really stopped, more like last-running-at */ + + p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", + (unsigned long long) pkt_dev->sofar, + (unsigned long long) pkt_dev->errors, + (unsigned long long) sa, + (unsigned long long) stopped, + (unsigned long long) pkt_dev->idle_acc); -out_reldev: - if (odev) { - dev_put(odev); - odev = NULL; - } + p += sprintf(p, " 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); - return; + if(pkt_dev->flags & F_IPV6) { + char b1[128], b2[128]; + fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); + fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); + p += sprintf(p, " cur_saddr: %s cur_daddr: %s\n", b2, b1); + } + else + p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x\n", + pkt_dev->cur_saddr, pkt_dev->cur_daddr); -} -/* proc/net/pktgen/pg */ + p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n", + pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); -static int proc_busy_read(char *buf , char **start, off_t offset, - int len, int *eof, void *data) -{ - char *p; - int idx = (int)(long)(data); - struct pktgen_info* info = NULL; - - if ((idx < 0) || (idx >= MAX_PKTGEN)) { - printk("ERROR: idx: %i is out of range in proc_write\n", idx); - return -EINVAL; - } - info = &(pginfos[idx]); - - p = buf; - p += sprintf(p, "%d\n", info->busy); - *eof = 1; - - return p-buf; -} + p += sprintf(p, " flows: %u\n", pkt_dev->nflows); -static int proc_read(char *buf , char **start, off_t offset, - int len, int *eof, void *data) -{ - char *p; - int i; - int idx = (int)(long)(data); - struct pktgen_info* info = NULL; - __u64 sa; - __u64 stopped; - __u64 now = getCurMs(); - - if ((idx < 0) || (idx >= MAX_PKTGEN)) { - printk("ERROR: idx: %i is out of range in proc_write\n", idx); - return -EINVAL; - } - info = &(pginfos[idx]); - - p = buf; - p += sprintf(p, "%s\n", VERSION); /* Help with parsing compatibility */ - p += sprintf(p, "Params: count %llu pkt_size: %u frags: %d ipg: %u clone_skb: %d odev \"%s\"\n", - (unsigned long long) info->count, - info->pkt_size, info->nfrags, info->ipg, - info->clone_skb, info->outdev); - p += sprintf(p, " dst_min: %s dst_max: %s src_min: %s src_max: %s\n", - info->dst_min, info->dst_max, info->src_min, info->src_max); - p += sprintf(p, " src_mac: "); - for (i = 0; i < 6; i++) { - p += sprintf(p, "%02X%s", info->src_mac[i], i == 5 ? " " : ":"); - } - p += sprintf(p, "dst_mac: "); - for (i = 0; i < 6; i++) { - p += sprintf(p, "%02X%s", info->dst_mac[i], i == 5 ? "\n" : ":"); - } - p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", - info->udp_src_min, info->udp_src_max, info->udp_dst_min, - info->udp_dst_max); - p += sprintf(p, " src_mac_count: %d dst_mac_count: %d\n Flags: ", - info->src_mac_count, info->dst_mac_count); - if (info->flags & F_IPSRC_RND) { - p += sprintf(p, "IPSRC_RND "); - } - if (info->flags & F_IPDST_RND) { - p += sprintf(p, "IPDST_RND "); - } - if (info->flags & F_UDPSRC_RND) { - p += sprintf(p, "UDPSRC_RND "); - } - if (info->flags & F_UDPDST_RND) { - p += sprintf(p, "UDPDST_RND "); - } - if (info->flags & F_MACSRC_RND) { - p += sprintf(p, "MACSRC_RND "); - } - if (info->flags & F_MACDST_RND) { - p += sprintf(p, "MACDST_RND "); - } - p += sprintf(p, "\n"); - - sa = tv_to_ms(&(info->started_at)); - stopped = tv_to_ms(&(info->stopped_at)); - if (info->do_run_run) { - stopped = now; /* not really stopped, more like last-running-at */ - } - p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %llums stopped: %llums now: %llums idle: %lluns\n", - (unsigned long long) info->sofar, - (unsigned long long) info->errors, - (unsigned long long) sa, - (unsigned long long) stopped, - (unsigned long long) now, - (unsigned long long) info->idle_acc); - p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", - info->seq_num, info->cur_dst_mac_offset, info->cur_src_mac_offset); - p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x cur_udp_dst: %d cur_udp_src: %d\n", - info->cur_saddr, info->cur_daddr, info->cur_udp_dst, info->cur_udp_src); - - if (info->result[0]) - p += sprintf(p, "Result: %s\n", info->result); + if (pkt_dev->result[0]) + p += sprintf(p, "Result: %s\n", pkt_dev->result); else p += sprintf(p, "Result: Idle\n"); *eof = 1; @@ -883,16 +733,16 @@ static int proc_read(char *buf , char **start, off_t offset, return p - buf; } + 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) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + switch (c) { case '\"': case '\n': case '\r': @@ -908,19 +758,17 @@ done: return i; } -static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen, +static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen, unsigned long *num) { int i = 0; - *num = 0; for(; i < maxlen; i++) { - char c; - - if (get_user(c, &user_buffer[i])) - return -EFAULT; - if ((c >= '0') && (c <= '9')) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + if ((c >= '0') && (c <= '9')) { *num *= 10; *num += c -'0'; } else @@ -934,316 +782,469 @@ static int strn_len(const char __user *user_buffer, unsigned int maxlen) int i = 0; for(; i < maxlen; i++) { - char c; - - if (get_user(c, &user_buffer[i])) - return -EFAULT; - switch (c) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + switch (c) { case '\"': case '\n': case '\r': case '\t': case ' ': goto done_str; + break; default: break; }; } done_str: + return i; } -static int proc_write(struct file *file, const char __user *user_buffer, - unsigned long count, void *data) +static int proc_if_write(struct file *file, const char __user *user_buffer, + unsigned long count, void *data) { int i = 0, max, len; char name[16], valstr[32]; unsigned long value = 0; - int idx = (int)(long)(data); - struct pktgen_info* info = NULL; - char* result = NULL; - int tmp; - - if ((idx < 0) || (idx >= MAX_PKTGEN)) { - printk("ERROR: idx: %i is out of range in proc_write\n", idx); - return -EINVAL; - } - info = &(pginfos[idx]); - result = &(info->result[0]); - + struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data); + char* pg_result = NULL; + int tmp = 0; + char buf[128]; + + pg_result = &(pkt_dev->result[0]); + if (count < 1) { - sprintf(result, "Wrong command format"); + printk("pktgen: wrong command format\n"); return -EINVAL; } max = count - i; tmp = count_trail_chars(&user_buffer[i], max); - if (tmp < 0) - return tmp; - i += tmp; - + if (tmp < 0) { + printk("pktgen: illegal format\n"); + return tmp; + } + i += tmp; + /* Read variable name */ len = strn_len(&user_buffer[i], sizeof(name) - 1); - if (len < 0) - return len; + if (len < 0) { return len; } memset(name, 0, sizeof(name)); - if (copy_from_user(name, &user_buffer[i], len)) + 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; + if (len < 0) + return len; + i += len; - if (debug) - printk("pg: %s,%lu\n", name, count); + if (debug) { + char tb[count + 1]; + if (copy_from_user(tb, user_buffer, count)) + return -EFAULT; + tb[count] = 0; + printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb); + } - if (!strcmp(name, "stop")) { - if (info->do_run_run) { - strcpy(result, "Stopping"); - } - else { - strcpy(result, "Already stopped...\n"); - } - info->do_run_run = 0; + if (!strcmp(name, "min_pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value < 14+20+8) + value = 14+20+8; + if (value != pkt_dev->min_pkt_size) { + pkt_dev->min_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size); + return count; + } + + if (!strcmp(name, "max_pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value < 14+20+8) + value = 14+20+8; + if (value != pkt_dev->max_pkt_size) { + pkt_dev->max_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size); return count; } + /* Shortcut for min = max */ + if (!strcmp(name, "pkt_size")) { len = num_arg(&user_buffer[i], 10, &value); - if (len < 0) - return len; + if (len < 0) { return len; } i += len; if (value < 14+20+8) value = 14+20+8; - info->pkt_size = value; - sprintf(result, "OK: pkt_size=%u", info->pkt_size); + if (value != pkt_dev->min_pkt_size) { + pkt_dev->min_pkt_size = value; + pkt_dev->max_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); + return count; + } + + if (!strcmp(name, "debug")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + debug = value; + sprintf(pg_result, "OK: debug=%u", debug); return count; } - if (!strcmp(name, "frags")) { + + if (!strcmp(name, "frags")) { len = num_arg(&user_buffer[i], 10, &value); - if (len < 0) - return len; + if (len < 0) { return len; } i += len; - info->nfrags = value; - sprintf(result, "OK: frags=%u", info->nfrags); + pkt_dev->nfrags = value; + sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); return count; } - if (!strcmp(name, "ipg")) { + if (!strcmp(name, "delay")) { len = num_arg(&user_buffer[i], 10, &value); - if (len < 0) - return len; + if (len < 0) { return len; } i += len; - info->ipg = value; - sprintf(result, "OK: ipg=%u", info->ipg); + if (value == 0x7FFFFFFF) { + pkt_dev->delay_us = 0x7FFFFFFF; + pkt_dev->delay_ns = 0; + } else { + pkt_dev->delay_us = value / 1000; + pkt_dev->delay_ns = value % 1000; + } + sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns); return count; } if (!strcmp(name, "udp_src_min")) { len = num_arg(&user_buffer[i], 10, &value); - if (len < 0) - return len; + if (len < 0) { return len; } i += len; - info->udp_src_min = value; - sprintf(result, "OK: udp_src_min=%u", info->udp_src_min); + 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; + if (len < 0) { return len; } i += len; - info->udp_dst_min = value; - sprintf(result, "OK: udp_dst_min=%u", info->udp_dst_min); + 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; + if (len < 0) { return len; } i += len; - info->udp_src_max = value; - sprintf(result, "OK: udp_src_max=%u", info->udp_src_max); + 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; + if (len < 0) { return len; } i += len; - info->udp_dst_max = value; - sprintf(result, "OK: udp_dst_max=%u", info->udp_dst_max); + 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 (len < 0) { return len; } i += len; - info->clone_skb = value; + pkt_dev->clone_skb = value; - sprintf(result, "OK: clone_skb=%d", info->clone_skb); + 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; + if (len < 0) { return len; } i += len; - info->count = value; - sprintf(result, "OK: count=%llu", (unsigned long long) info->count); + 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; + if (len < 0) { return len; } i += len; - info->src_mac_count = value; - sprintf(result, "OK: src_mac_count=%d", info->src_mac_count); + 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; + if (len < 0) { return len; } i += len; - info->dst_mac_count = value; - sprintf(result, "OK: dst_mac_count=%d", info->dst_mac_count); - return count; - } - if (!strcmp(name, "odev")) { - len = strn_len(&user_buffer[i], sizeof(info->outdev) - 1); - if (len < 0) - return len; - memset(info->outdev, 0, sizeof(info->outdev)); - if (copy_from_user(info->outdev, &user_buffer[i], len)) - return -EFAULT; - i += len; - sprintf(result, "OK: odev=%s", info->outdev); + if (pkt_dev->dst_mac_count != value) { + pkt_dev->dst_mac_count = value; + pkt_dev->cur_dst_mac_offset = 0; + } + sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count); return count; } if (!strcmp(name, "flag")) { - char f[32]; + char f[32]; + memset(f, 0, 32); len = strn_len(&user_buffer[i], sizeof(f) - 1); - if (len < 0) - return len; - memset(f, 0, 32); + if (len < 0) { return len; } if (copy_from_user(f, &user_buffer[i], len)) return -EFAULT; i += len; - if (strcmp(f, "IPSRC_RND") == 0) { - info->flags |= F_IPSRC_RND; - } - else if (strcmp(f, "!IPSRC_RND") == 0) { - info->flags &= ~F_IPSRC_RND; - } - else if (strcmp(f, "IPDST_RND") == 0) { - info->flags |= F_IPDST_RND; - } - else if (strcmp(f, "!IPDST_RND") == 0) { - info->flags &= ~F_IPDST_RND; - } - else if (strcmp(f, "UDPSRC_RND") == 0) { - info->flags |= F_UDPSRC_RND; - } - else if (strcmp(f, "!UDPSRC_RND") == 0) { - info->flags &= ~F_UDPSRC_RND; - } - else if (strcmp(f, "UDPDST_RND") == 0) { - info->flags |= F_UDPDST_RND; - } - else if (strcmp(f, "!UDPDST_RND") == 0) { - info->flags &= ~F_UDPDST_RND; - } - else if (strcmp(f, "MACSRC_RND") == 0) { - info->flags |= F_MACSRC_RND; - } - else if (strcmp(f, "!MACSRC_RND") == 0) { - info->flags &= ~F_MACSRC_RND; - } - else if (strcmp(f, "MACDST_RND") == 0) { - info->flags |= F_MACDST_RND; - } - else if (strcmp(f, "!MACDST_RND") == 0) { - info->flags &= ~F_MACDST_RND; - } - else { - sprintf(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\n"); - return count; - } - sprintf(result, "OK: flags=0x%x", info->flags); + if (strcmp(f, "IPSRC_RND") == 0) + pkt_dev->flags |= F_IPSRC_RND; + + else if (strcmp(f, "!IPSRC_RND") == 0) + pkt_dev->flags &= ~F_IPSRC_RND; + + else if (strcmp(f, "TXSIZE_RND") == 0) + pkt_dev->flags |= F_TXSIZE_RND; + + else if (strcmp(f, "!TXSIZE_RND") == 0) + pkt_dev->flags &= ~F_TXSIZE_RND; + + else if (strcmp(f, "IPDST_RND") == 0) + pkt_dev->flags |= F_IPDST_RND; + + else if (strcmp(f, "!IPDST_RND") == 0) + pkt_dev->flags &= ~F_IPDST_RND; + + else if (strcmp(f, "UDPSRC_RND") == 0) + pkt_dev->flags |= F_UDPSRC_RND; + + else if (strcmp(f, "!UDPSRC_RND") == 0) + pkt_dev->flags &= ~F_UDPSRC_RND; + + else if (strcmp(f, "UDPDST_RND") == 0) + pkt_dev->flags |= F_UDPDST_RND; + + else if (strcmp(f, "!UDPDST_RND") == 0) + pkt_dev->flags &= ~F_UDPDST_RND; + + else if (strcmp(f, "MACSRC_RND") == 0) + pkt_dev->flags |= F_MACSRC_RND; + + else if (strcmp(f, "!MACSRC_RND") == 0) + pkt_dev->flags &= ~F_MACSRC_RND; + + else if (strcmp(f, "MACDST_RND") == 0) + pkt_dev->flags |= F_MACDST_RND; + + else if (strcmp(f, "!MACDST_RND") == 0) + pkt_dev->flags &= ~F_MACDST_RND; + + else { + sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", + f, + "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n"); + return count; + } + sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); return count; } if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { - len = strn_len(&user_buffer[i], sizeof(info->dst_min) - 1); - if (len < 0) - return len; - memset(info->dst_min, 0, sizeof(info->dst_min)); - if (copy_from_user(info->dst_min, &user_buffer[i], len)) + 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; - if(debug) - printk("pg: dst_min set to: %s\n", info->dst_min); - i += len; - sprintf(result, "OK: dst_min=%s", info->dst_min); + buf[len] = 0; + if (strcmp(buf, pkt_dev->dst_min) != 0) { + memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); + strncpy(pkt_dev->dst_min, buf, len); + pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); + pkt_dev->cur_daddr = pkt_dev->daddr_min; + } + if(debug) + printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min); + i += len; + sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); return count; } if (!strcmp(name, "dst_max")) { - len = strn_len(&user_buffer[i], sizeof(info->dst_max) - 1); - if (len < 0) - return len; - memset(info->dst_max, 0, sizeof(info->dst_max)); - if (copy_from_user(info->dst_max, &user_buffer[i], len)) + len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); + if (len < 0) { return len; } + + if (copy_from_user(buf, &user_buffer[i], len)) return -EFAULT; + + buf[len] = 0; + if (strcmp(buf, pkt_dev->dst_max) != 0) { + memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); + strncpy(pkt_dev->dst_max, buf, len); + pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); + pkt_dev->cur_daddr = pkt_dev->daddr_max; + } if(debug) - printk("pg: dst_max set to: %s\n", info->dst_max); + printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max); i += len; - sprintf(result, "OK: dst_max=%s", info->dst_max); + sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); + return count; + } + if (!strcmp(name, "dst6")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); + fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); + + ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); + + if(debug) + printk("pktgen: dst6 set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6=%s", buf); + return count; + } + if (!strcmp(name, "dst6_min")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); + fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); + + ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr); + if(debug) + printk("pktgen: dst6_min set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_min=%s", buf); + return count; + } + if (!strcmp(name, "dst6_max")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); + fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); + + if(debug) + printk("pktgen: dst6_max set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_max=%s", buf); + return count; + } + if (!strcmp(name, "src6")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); + fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); + + ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); + + if(debug) + printk("pktgen: src6 set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: src6=%s", buf); return count; } if (!strcmp(name, "src_min")) { - len = strn_len(&user_buffer[i], sizeof(info->src_min) - 1); - if (len < 0) - return len; - memset(info->src_min, 0, sizeof(info->src_min)); - if (copy_from_user(info->src_min, &user_buffer[i], len)) + len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); + if (len < 0) { return len; } + if (copy_from_user(buf, &user_buffer[i], len)) return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->src_min) != 0) { + memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); + strncpy(pkt_dev->src_min, buf, len); + pkt_dev->saddr_min = in_aton(pkt_dev->src_min); + pkt_dev->cur_saddr = pkt_dev->saddr_min; + } if(debug) - printk("pg: src_min set to: %s\n", info->src_min); + printk("pktgen: src_min set to: %s\n", pkt_dev->src_min); i += len; - sprintf(result, "OK: src_min=%s", info->src_min); + 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(info->src_max) - 1); - if (len < 0) - return len; - memset(info->src_max, 0, sizeof(info->src_max)); - if (copy_from_user(info->src_max, &user_buffer[i], len)) + len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); + if (len < 0) { return len; } + if (copy_from_user(buf, &user_buffer[i], len)) return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->src_max) != 0) { + memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); + strncpy(pkt_dev->src_max, buf, len); + pkt_dev->saddr_max = in_aton(pkt_dev->src_max); + pkt_dev->cur_saddr = pkt_dev->saddr_max; + } if(debug) - printk("pg: src_max set to: %s\n", info->src_max); + printk("pktgen: src_max set to: %s\n", pkt_dev->src_max); i += len; - sprintf(result, "OK: src_max=%s", info->src_max); + sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); return count; } - if (!strcmp(name, "dstmac")) { + if (!strcmp(name, "dst_mac")) { char *v = valstr; - unsigned char *m = info->dst_mac; - + unsigned char old_dmac[6]; + unsigned char *m = pkt_dev->dst_mac; + memcpy(old_dmac, pkt_dev->dst_mac, 6); + len = strn_len(&user_buffer[i], sizeof(valstr) - 1); - if (len < 0) - return len; + if (len < 0) { return len; } memset(valstr, 0, sizeof(valstr)); - if (copy_from_user(valstr, &user_buffer[i], len)) + if( copy_from_user(valstr, &user_buffer[i], len)) return -EFAULT; i += len; - for(*m = 0;*v && m < info->dst_mac + 6; v++) { + for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) { if (*v >= '0' && *v <= '9') { *m *= 16; *m += *v - '0'; @@ -1260,23 +1261,27 @@ static int proc_write(struct file *file, const char __user *user_buffer, m++; *m = 0; } - } - sprintf(result, "OK: dstmac"); + } + + /* Set up Dest MAC */ + if (memcmp(old_dmac, pkt_dev->dst_mac, 6) != 0) + memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6); + + sprintf(pg_result, "OK: dstmac"); return count; } - if (!strcmp(name, "srcmac")) { + if (!strcmp(name, "src_mac")) { char *v = valstr; - unsigned char *m = info->src_mac; + unsigned char *m = pkt_dev->src_mac; len = strn_len(&user_buffer[i], sizeof(valstr) - 1); - if (len < 0) - return len; + if (len < 0) { return len; } memset(valstr, 0, sizeof(valstr)); - if (copy_from_user(valstr, &user_buffer[i], len)) + if( copy_from_user(valstr, &user_buffer[i], len)) return -EFAULT; i += len; - for(*m = 0;*v && m < info->src_mac + 6; v++) { + for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) { if (*v >= '0' && *v <= '9') { *m *= 16; *m += *v - '0'; @@ -1294,135 +1299,1834 @@ static int proc_write(struct file *file, const char __user *user_buffer, *m = 0; } } - sprintf(result, "OK: srcmac"); + + sprintf(pg_result, "OK: srcmac"); return count; } - if (!strcmp(name, "inject") || !strcmp(name, "start")) { - if (info->busy) { - strcpy(info->result, "Already running...\n"); - } - else { - info->busy = 1; - strcpy(info->result, "Starting"); - inject(info); - info->busy = 0; - } + 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; } - sprintf(info->result, "No such parameter \"%s\"", name); + if (!strcmp(name, "flowlen")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + pkt_dev->lflow = value; + sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); + return count; + } + + sprintf(pkt_dev->result, "No such parameter \"%s\"", name); return -EINVAL; } - -static int create_proc_dir(void) +static int proc_thread_read(char *buf , char **start, off_t offset, + int len, int *eof, void *data) { - int len; - /* does proc_dir already exists */ - len = strlen(PG_PROC_DIR); - - for (proc_dir = proc_net->subdir; proc_dir; - proc_dir=proc_dir->next) { - if ((proc_dir->namelen == len) && - (! memcmp(proc_dir->name, PG_PROC_DIR, len))) - break; - } - if (!proc_dir) - proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net); - if (!proc_dir) return -ENODEV; - return 1; -} + char *p; + struct pktgen_thread *t = (struct pktgen_thread*)(data); + struct pktgen_dev *pkt_dev = NULL; -static int remove_proc_dir(void) -{ - remove_proc_entry(PG_PROC_DIR, proc_net); - return 1; + + if (!t) { + printk("pktgen: ERROR: could not find thread in proc_thread_read\n"); + return -EINVAL; + } + + p = buf; + p += sprintf(p, "Name: %s max_before_softirq: %d\n", + t->name, t->max_before_softirq); + + p += sprintf(p, "Running: "); + + if_lock(t); + for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next) + if(pkt_dev->running) + p += sprintf(p, "%s ", pkt_dev->ifname); + + p += sprintf(p, "\nStopped: "); + + for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next) + if(!pkt_dev->running) + p += sprintf(p, "%s ", pkt_dev->ifname); + + if (t->result[0]) + p += sprintf(p, "\nResult: %s\n", t->result); + else + p += sprintf(p, "\nResult: NA\n"); + + *eof = 1; + + if_unlock(t); + + return p - buf; } -static int __init init(void) +static int proc_thread_write(struct file *file, const char __user *user_buffer, + unsigned long count, void *data) { - int i; - printk(version); - cycles_calibrate(); - if (cpu_speed == 0) { - printk("pktgen: Error: your machine does not have working cycle counter.\n"); + int i = 0, max, len, ret; + char name[40]; + struct pktgen_thread *t; + char *pg_result; + unsigned long value = 0; + + if (count < 1) { + // sprintf(pg_result, "Wrong command format"); return -EINVAL; } + + max = count - i; + len = count_trail_chars(&user_buffer[i], max); + if (len < 0) + return len; + + i += len; + + /* Read variable name */ - create_proc_dir(); - - for (i = 0; iread_proc = proc_read; - pginfos[i].proc_ent->write_proc = proc_write; - pginfos[i].proc_ent->data = (void*)(long)(i); - pginfos[i].proc_ent->owner = THIS_MODULE; - - sprintf(pginfos[i].busy_fname, "net/%s/pg_busy%i", PG_PROC_DIR, i); - pginfos[i].busy_proc_ent = create_proc_entry(pginfos[i].busy_fname, 0, NULL); - if (!pginfos[i].busy_proc_ent) { - printk("pktgen: Error: cannot create net/%s/pg_busy procfs entry.\n", PG_PROC_DIR); - goto cleanup_mem; - } - pginfos[i].busy_proc_ent->read_proc = proc_busy_read; - pginfos[i].busy_proc_ent->data = (void*)(long)(i); - } - return 0; + len = strn_len(&user_buffer[i], sizeof(name) - 1); + if (len < 0) + return len; -cleanup_mem: - for (i = 0; iresult[0]); + + if (!strcmp(name, "add_device")) { + char f[32]; + memset(f, 0, 32); + len = strn_len(&user_buffer[i], sizeof(f) - 1); + if (len < 0) { + ret = len; + goto out; + } + if( copy_from_user(f, &user_buffer[i], len) ) + return -EFAULT; + i += len; + thread_lock(); + pktgen_add_device(t, f); + thread_unlock(); + ret = count; + sprintf(pg_result, "OK: add_device=%s", f); + goto out; + } + + if (!strcmp(name, "rem_device_all")) { + thread_lock(); + t->control |= T_REMDEV; + thread_unlock(); + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(HZ/8); /* Propagate thread->control */ + ret = count; + sprintf(pg_result, "OK: rem_device_all"); + goto out; + } + + if (!strcmp(name, "max_before_softirq")) { + len = num_arg(&user_buffer[i], 10, &value); + thread_lock(); + t->max_before_softirq = value; + thread_unlock(); + ret = count; + sprintf(pg_result, "OK: max_before_softirq=%lu", value); + goto out; + } + + ret = -EINVAL; + out: + + return ret; +} + +static int create_proc_dir(void) +{ + int len; + /* does proc_dir already exists */ + len = strlen(PG_PROC_DIR); + + for (pg_proc_dir = proc_net->subdir; pg_proc_dir; pg_proc_dir=pg_proc_dir->next) { + if ((pg_proc_dir->namelen == len) && + (! memcmp(pg_proc_dir->name, PG_PROC_DIR, len))) + break; + } + + if (!pg_proc_dir) + pg_proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net); + + if (!pg_proc_dir) + return -ENODEV; + + return 0; +} + +static int remove_proc_dir(void) +{ + remove_proc_entry(PG_PROC_DIR, proc_net); + return 0; +} + +/* Think find or remove for NN */ +static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove) +{ + struct pktgen_thread *t; + struct pktgen_dev *pkt_dev = NULL; + + t = pktgen_threads; + + while (t) { + pkt_dev = pktgen_find_dev(t, ifname); + if (pkt_dev) { + if(remove) { + if_lock(t); + pktgen_remove_device(t, pkt_dev); + if_unlock(t); + } + break; + } + t = t->next; + } + return pkt_dev; +} + +static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove) +{ + struct pktgen_dev *pkt_dev = NULL; + thread_lock(); + pkt_dev = __pktgen_NN_threads(ifname, remove); + thread_unlock(); + return pkt_dev; +} + +static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr) +{ + struct net_device *dev = (struct net_device *)(ptr); + + /* It is OK that we do not hold the group lock right now, + * as we run under the RTNL lock. + */ + + switch (event) { + case NETDEV_CHANGEADDR: + case NETDEV_GOING_DOWN: + case NETDEV_DOWN: + case NETDEV_UP: + /* Ignore for now */ + break; + + case NETDEV_UNREGISTER: + pktgen_NN_threads(dev->name, REMOVE); + break; + }; + + return NOTIFY_DONE; +} + +/* Associate pktgen_dev with a device. */ + +static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) { + struct net_device *odev; + + /* Clean old setups */ + + if (pkt_dev->odev) { + dev_put(pkt_dev->odev); + pkt_dev->odev = NULL; + } + + odev = dev_get_by_name(pkt_dev->ifname); + + if (!odev) { + printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname); + goto out; + } + if (odev->type != ARPHRD_ETHER) { + printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname); + goto out_put; + } + if (!netif_running(odev)) { + printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname); + goto out_put; + } + pkt_dev->odev = odev; + + return pkt_dev->odev; + +out_put: + dev_put(odev); +out: + return NULL; + +} + +/* Read pkt_dev from the interface and set up internal pktgen_dev + * structure to have the right information to create/send packets + */ +static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) +{ + /* Try once more, just in case it works now. */ + if (!pkt_dev->odev) + pktgen_setup_dev(pkt_dev); + + if (!pkt_dev->odev) { + printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n"); + sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); + return; + } + + /* Default to the interface's mac if not explicitly set. */ + + if ((pkt_dev->src_mac[0] == 0) && + (pkt_dev->src_mac[1] == 0) && + (pkt_dev->src_mac[2] == 0) && + (pkt_dev->src_mac[3] == 0) && + (pkt_dev->src_mac[4] == 0) && + (pkt_dev->src_mac[5] == 0)) { + + memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, 6); + } + /* Set up Dest MAC */ + memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6); + + /* Set up pkt size */ + pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; + + if(pkt_dev->flags & F_IPV6) { + /* + * Skip this automatic address setting until locks or functions + * gets exported + */ + +#ifdef NOTNOW + int i, set = 0, err=1; + struct inet6_dev *idev; + + for(i=0; i< IN6_ADDR_HSIZE; i++) + if(pkt_dev->cur_in6_saddr.s6_addr[i]) { + set = 1; + break; + } + + if(!set) { + + /* + * Use linklevel address if unconfigured. + * + * use ipv6_get_lladdr if/when it's get exported + */ + + + read_lock(&addrconf_lock); + if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { + struct inet6_ifaddr *ifp; + + read_lock_bh(&idev->lock); + for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { + if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { + ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr); + err = 0; + break; + } + } + read_unlock_bh(&idev->lock); + } + read_unlock(&addrconf_lock); + if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n"); + } +#endif + } + else { + pkt_dev->saddr_min = 0; + pkt_dev->saddr_max = 0; + if (strlen(pkt_dev->src_min) == 0) { + + struct in_device *in_dev; + + rcu_read_lock(); + in_dev = __in_dev_get(pkt_dev->odev); + if (in_dev) { + if (in_dev->ifa_list) { + pkt_dev->saddr_min = in_dev->ifa_list->ifa_address; + pkt_dev->saddr_max = pkt_dev->saddr_min; + } + __in_dev_put(in_dev); + } + rcu_read_unlock(); + } + else { + pkt_dev->saddr_min = in_aton(pkt_dev->src_min); + pkt_dev->saddr_max = in_aton(pkt_dev->src_max); + } + + pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); + pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); + } + /* Initialize current values. */ + pkt_dev->cur_dst_mac_offset = 0; + pkt_dev->cur_src_mac_offset = 0; + pkt_dev->cur_saddr = pkt_dev->saddr_min; + pkt_dev->cur_daddr = pkt_dev->daddr_min; + pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; + pkt_dev->cur_udp_src = pkt_dev->udp_src_min; + pkt_dev->nflows = 0; +} + +static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) +{ + __u64 start; + __u64 now; + + start = now = getCurUs(); + printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now)); + while (now < spin_until_us) { + /* TODO: optimise sleeping behavior */ + if (spin_until_us - now > (1000000/HZ)+1) { + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1); + } else if (spin_until_us - now > 100) { + do_softirq(); + if (!pkt_dev->running) + return; + if (need_resched()) + schedule(); + } + + now = getCurUs(); + } + + pkt_dev->idle_acc += now - start; +} + + +/* Increment/randomize headers according to flags and current values + * for IP src/dest, UDP src/dst port, MAC-Addr src/dst + */ +static void mod_cur_headers(struct pktgen_dev *pkt_dev) { + __u32 imn; + __u32 imx; + int flow = 0; + + if(pkt_dev->cflows) { + flow = pktgen_random() % pkt_dev->cflows; + + if (pkt_dev->flows[flow].count > pkt_dev->lflow) + pkt_dev->flows[flow].count = 0; + } + + + /* Deal with source MAC */ + if (pkt_dev->src_mac_count > 1) { + __u32 mc; + __u32 tmp; + + if (pkt_dev->flags & F_MACSRC_RND) + mc = pktgen_random() % (pkt_dev->src_mac_count); + else { + mc = pkt_dev->cur_src_mac_offset++; + if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count) + pkt_dev->cur_src_mac_offset = 0; + } + + tmp = pkt_dev->src_mac[5] + (mc & 0xFF); + pkt_dev->hh[11] = tmp; + tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[10] = tmp; + tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[9] = tmp; + tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[8] = tmp; + tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); + pkt_dev->hh[7] = tmp; + } + + /* Deal with Destination MAC */ + if (pkt_dev->dst_mac_count > 1) { + __u32 mc; + __u32 tmp; + + if (pkt_dev->flags & F_MACDST_RND) + mc = pktgen_random() % (pkt_dev->dst_mac_count); + + else { + mc = pkt_dev->cur_dst_mac_offset++; + if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) { + pkt_dev->cur_dst_mac_offset = 0; + } + } + + tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); + pkt_dev->hh[5] = tmp; + tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[4] = tmp; + tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[3] = tmp; + tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[2] = tmp; + tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); + pkt_dev->hh[1] = tmp; + } + + if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { + if (pkt_dev->flags & F_UDPSRC_RND) + pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min); + + else { + pkt_dev->cur_udp_src++; + if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) + pkt_dev->cur_udp_src = pkt_dev->udp_src_min; + } + } + + if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { + if (pkt_dev->flags & F_UDPDST_RND) { + pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min); + } + else { + pkt_dev->cur_udp_dst++; + if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) + pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; + } + } + + if (!(pkt_dev->flags & F_IPV6)) { + + if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) { + __u32 t; + if (pkt_dev->flags & F_IPSRC_RND) + t = ((pktgen_random() % (imx - imn)) + imn); + else { + t = ntohl(pkt_dev->cur_saddr); + t++; + if (t > imx) { + t = imn; + } + } + pkt_dev->cur_saddr = htonl(t); + } + + if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) { + pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; + } else { + + if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) { + __u32 t; + if (pkt_dev->flags & F_IPDST_RND) { + + t = ((pktgen_random() % (imx - imn)) + imn); + t = htonl(t); + + while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) { + t = ((pktgen_random() % (imx - imn)) + imn); + t = htonl(t); + } + pkt_dev->cur_daddr = t; + } + + else { + t = ntohl(pkt_dev->cur_daddr); + t++; + if (t > imx) { + t = imn; + } + pkt_dev->cur_daddr = htonl(t); + } + } + if(pkt_dev->cflows) { + pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr; + pkt_dev->nflows++; + } + } + } + else /* IPV6 * */ + { + if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && + pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && + pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && + pkt_dev->min_in6_daddr.s6_addr32[3] == 0); + else { + int i; + + /* Only random destinations yet */ + + for(i=0; i < 4; i++) { + pkt_dev->cur_in6_daddr.s6_addr32[i] = + ((pktgen_random() | + pkt_dev->min_in6_daddr.s6_addr32[i]) & + pkt_dev->max_in6_daddr.s6_addr32[i]); + } + } + } + + if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { + __u32 t; + if (pkt_dev->flags & F_TXSIZE_RND) { + t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)) + + pkt_dev->min_pkt_size); + } + else { + t = pkt_dev->cur_pkt_size + 1; + if (t > pkt_dev->max_pkt_size) + t = pkt_dev->min_pkt_size; + } + pkt_dev->cur_pkt_size = t; + } + + pkt_dev->flows[flow].count++; +} + + +static struct sk_buff *fill_packet_ipv4(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + struct sk_buff *skb = NULL; + __u8 *eth; + struct udphdr *udph; + int datalen, iplen; + struct iphdr *iph; + struct pktgen_hdr *pgh = NULL; + + skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC); + if (!skb) { + sprintf(pkt_dev->result, "No memory"); + return NULL; + } + + skb_reserve(skb, 16); + + /* Reserve for ethernet and IP header */ + eth = (__u8 *) skb_push(skb, 14); + iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr)); + udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); + + /* Update any of the values, used when we're incrementing various + * fields. + */ + mod_cur_headers(pkt_dev); + + memcpy(eth, pkt_dev->hh, 12); + *(u16*)ð[12] = __constant_htons(ETH_P_IP); + + datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */ + if (datalen < sizeof(struct pktgen_hdr)) + datalen = sizeof(struct pktgen_hdr); + + udph->source = htons(pkt_dev->cur_udp_src); + udph->dest = htons(pkt_dev->cur_udp_dst); + udph->len = htons(datalen + 8); /* DATA + udphdr */ + udph->check = 0; /* No checksum */ + + iph->ihl = 5; + iph->version = 4; + iph->ttl = 32; + iph->tos = 0; + iph->protocol = IPPROTO_UDP; /* UDP */ + iph->saddr = pkt_dev->cur_saddr; + iph->daddr = pkt_dev->cur_daddr; + iph->frag_off = 0; + iplen = 20 + 8 + datalen; + iph->tot_len = htons(iplen); + iph->check = 0; + iph->check = ip_fast_csum((void *) iph, iph->ihl); + skb->protocol = __constant_htons(ETH_P_IP); + skb->mac.raw = ((u8 *)iph) - 14; + skb->dev = odev; + skb->pkt_type = PACKET_HOST; + + if (pkt_dev->nfrags <= 0) + pgh = (struct pktgen_hdr *)skb_put(skb, datalen); + else { + int frags = pkt_dev->nfrags; + int i; + + pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); + + if (frags > MAX_SKB_FRAGS) + frags = MAX_SKB_FRAGS; + if (datalen > frags*PAGE_SIZE) { + skb_put(skb, datalen-frags*PAGE_SIZE); + datalen = frags*PAGE_SIZE; + } + + i = 0; + while (datalen > 0) { + struct page *page = alloc_pages(GFP_KERNEL, 0); + skb_shinfo(skb)->frags[i].page = page; + skb_shinfo(skb)->frags[i].page_offset = 0; + skb_shinfo(skb)->frags[i].size = + (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); + datalen -= skb_shinfo(skb)->frags[i].size; + skb->len += skb_shinfo(skb)->frags[i].size; + skb->data_len += skb_shinfo(skb)->frags[i].size; + i++; + skb_shinfo(skb)->nr_frags = i; + } + + while (i < frags) { + int rem; + + if (i == 0) + break; + + rem = skb_shinfo(skb)->frags[i - 1].size / 2; + if (rem == 0) + break; + + skb_shinfo(skb)->frags[i - 1].size -= rem; + + skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; + get_page(skb_shinfo(skb)->frags[i].page); + skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; + skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; + skb_shinfo(skb)->frags[i].size = rem; + i++; + skb_shinfo(skb)->nr_frags = i; + } + } + + /* Stamp the time, and sequence number, convert them to network byte order */ + + if (pgh) { + struct timeval timestamp; + + pgh->pgh_magic = htonl(PKTGEN_MAGIC); + pgh->seq_num = htonl(pkt_dev->seq_num); + + do_gettimeofday(×tamp); + pgh->tv_sec = htonl(timestamp.tv_sec); + pgh->tv_usec = htonl(timestamp.tv_usec); + } + pkt_dev->seq_num++; + + return skb; +} + +/* + * scan_ip6, fmt_ip taken from dietlibc-0.21 + * Author Felix von Leitner + * + * Slightly modified for kernel. + * Should be candidate for net/ipv4/utils.c + * --ro + */ + +static unsigned int scan_ip6(const char *s,char ip[16]) +{ + unsigned int i; + unsigned int len=0; + unsigned long u; + char suffix[16]; + unsigned int prefixlen=0; + unsigned int suffixlen=0; + __u32 tmp; + + for (i=0; i<16; i++) ip[i]=0; + + for (;;) { + if (*s == ':') { + len++; + if (s[1] == ':') { /* Found "::", skip to part 2 */ + s+=2; + len++; + break; + } + s++; + } + { + char *tmp; + u=simple_strtoul(s,&tmp,16); + i=tmp-s; + } + + if (!i) return 0; + if (prefixlen==12 && s[i]=='.') { + + /* the last 4 bytes may be written as IPv4 address */ + + tmp = in_aton(s); + memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp)); + return i+len; + } + ip[prefixlen++] = (u >> 8); + ip[prefixlen++] = (u & 255); + s += i; len += i; + if (prefixlen==16) + return len; + } + +/* part 2, after "::" */ + for (;;) { + if (*s == ':') { + if (suffixlen==0) + break; + s++; + len++; + } else if (suffixlen!=0) + break; + { + char *tmp; + u=simple_strtol(s,&tmp,16); + i=tmp-s; + } + if (!i) { + if (*s) len--; + break; + } + if (suffixlen+prefixlen<=12 && s[i]=='.') { + tmp = in_aton(s); + memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp)); + suffixlen+=4; + len+=strlen(s); + break; + } + suffix[suffixlen++] = (u >> 8); + suffix[suffixlen++] = (u & 255); + s += i; len += i; + if (prefixlen+suffixlen==16) + break; + } + for (i=0; i9?hexdigit+'a'-10:hexdigit+'0'; +} + +static int fmt_xlong(char* s,unsigned int i) { + char* bak=s; + *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s; + *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s; + *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s; + *s=tohex(i&0xf); + return s-bak+1; +} + +static unsigned int fmt_ip6(char *s,const char ip[16]) { + unsigned int len; + unsigned int i; + unsigned int temp; + unsigned int compressing; + int j; + + len = 0; compressing = 0; + for (j=0; j<16; j+=2) { + +#ifdef V4MAPPEDPREFIX + if (j==12 && !memcmp(ip,V4mappedprefix,12)) { + inet_ntoa_r(*(struct in_addr*)(ip+12),s); + temp=strlen(s); + return len+temp; + } +#endif + temp = ((unsigned long) (unsigned char) ip[j] << 8) + + (unsigned long) (unsigned char) ip[j+1]; + if (temp == 0) { + if (!compressing) { + compressing=1; + if (j==0) { + *s++=':'; ++len; + } + } + } else { + if (compressing) { + compressing=0; + *s++=':'; ++len; + } + i = fmt_xlong(s,temp); len += i; s += i; + if (j<14) { + *s++ = ':'; + ++len; + } + } + } + if (compressing) { + *s++=':'; ++len; + } + *s=0; + return len; +} + +static struct sk_buff *fill_packet_ipv6(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + struct sk_buff *skb = NULL; + __u8 *eth; + struct udphdr *udph; + int datalen; + struct ipv6hdr *iph; + struct pktgen_hdr *pgh = NULL; + + skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC); + if (!skb) { + sprintf(pkt_dev->result, "No memory"); + return NULL; + } + + skb_reserve(skb, 16); + + /* Reserve for ethernet and IP header */ + eth = (__u8 *) skb_push(skb, 14); + iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr)); + udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); + + + /* Update any of the values, used when we're incrementing various + * fields. + */ + mod_cur_headers(pkt_dev); + + + memcpy(eth, pkt_dev->hh, 12); + *(u16*)ð[12] = __constant_htons(ETH_P_IPV6); + + + datalen = pkt_dev->cur_pkt_size-14- + sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */ + + if (datalen < sizeof(struct pktgen_hdr)) { + datalen = sizeof(struct pktgen_hdr); + if (net_ratelimit()) + printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen); + } + + udph->source = htons(pkt_dev->cur_udp_src); + udph->dest = htons(pkt_dev->cur_udp_dst); + udph->len = htons(datalen + sizeof(struct udphdr)); + udph->check = 0; /* No checksum */ + + *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */ + + iph->hop_limit = 32; + + iph->payload_len = htons(sizeof(struct udphdr) + datalen); + iph->nexthdr = IPPROTO_UDP; + + ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); + ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); + + skb->mac.raw = ((u8 *)iph) - 14; + skb->protocol = __constant_htons(ETH_P_IPV6); + skb->dev = odev; + skb->pkt_type = PACKET_HOST; + + if (pkt_dev->nfrags <= 0) + pgh = (struct pktgen_hdr *)skb_put(skb, datalen); + else { + int frags = pkt_dev->nfrags; + int i; + + pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); + + if (frags > MAX_SKB_FRAGS) + frags = MAX_SKB_FRAGS; + if (datalen > frags*PAGE_SIZE) { + skb_put(skb, datalen-frags*PAGE_SIZE); + datalen = frags*PAGE_SIZE; + } + + i = 0; + while (datalen > 0) { + struct page *page = alloc_pages(GFP_KERNEL, 0); + skb_shinfo(skb)->frags[i].page = page; + skb_shinfo(skb)->frags[i].page_offset = 0; + skb_shinfo(skb)->frags[i].size = + (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); + datalen -= skb_shinfo(skb)->frags[i].size; + skb->len += skb_shinfo(skb)->frags[i].size; + skb->data_len += skb_shinfo(skb)->frags[i].size; + i++; + skb_shinfo(skb)->nr_frags = i; + } + + while (i < frags) { + int rem; + + if (i == 0) + break; + + rem = skb_shinfo(skb)->frags[i - 1].size / 2; + if (rem == 0) + break; + + skb_shinfo(skb)->frags[i - 1].size -= rem; + + skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; + get_page(skb_shinfo(skb)->frags[i].page); + skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; + skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; + skb_shinfo(skb)->frags[i].size = rem; + i++; + skb_shinfo(skb)->nr_frags = i; + } + } + + /* Stamp the time, and sequence number, convert them to network byte order */ + /* should we update cloned packets too ? */ + if (pgh) { + struct timeval timestamp; + + pgh->pgh_magic = htonl(PKTGEN_MAGIC); + pgh->seq_num = htonl(pkt_dev->seq_num); + + do_gettimeofday(×tamp); + pgh->tv_sec = htonl(timestamp.tv_sec); + pgh->tv_usec = htonl(timestamp.tv_usec); + } + pkt_dev->seq_num++; + + return skb; +} + +static inline struct sk_buff *fill_packet(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + if(pkt_dev->flags & F_IPV6) + return fill_packet_ipv6(odev, pkt_dev); + else + return fill_packet_ipv4(odev, pkt_dev); +} + +static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) +{ + pkt_dev->seq_num = 1; + pkt_dev->idle_acc = 0; + pkt_dev->sofar = 0; + pkt_dev->tx_bytes = 0; + pkt_dev->errors = 0; +} + +/* Set up structure for sending pkts, clear counters */ + +static void pktgen_run(struct pktgen_thread *t) +{ + struct pktgen_dev *pkt_dev = NULL; + int started = 0; + + PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t)); + + if_lock(t); + for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) { + + /* + * setup odev and create initial packet. + */ + pktgen_setup_inject(pkt_dev); + + if(pkt_dev->odev) { + pktgen_clear_counters(pkt_dev); + pkt_dev->running = 1; /* Cranke yeself! */ + pkt_dev->skb = NULL; + pkt_dev->started_at = getCurUs(); + pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ + pkt_dev->next_tx_ns = 0; + + strcpy(pkt_dev->result, "Starting"); + started++; + } + else + strcpy(pkt_dev->result, "Error starting"); + } + if_unlock(t); + if(started) t->control &= ~(T_STOP); +} + +static void pktgen_stop_all_threads_ifs(void) +{ + struct pktgen_thread *t = pktgen_threads; + + PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n")); + + thread_lock(); + while(t) { + pktgen_stop(t); + t = t->next; + } + thread_unlock(); +} + +static int thread_is_running(struct pktgen_thread *t ) +{ + struct pktgen_dev *next; + int res = 0; + + for(next=t->if_list; next; next=next->next) { + if(next->running) { + res = 1; + break; + } + } + return res; +} + +static int pktgen_wait_thread_run(struct pktgen_thread *t ) +{ + if_lock(t); + + while(thread_is_running(t)) { + + if_unlock(t); + + msleep_interruptible(100); + + if (signal_pending(current)) + goto signal; + if_lock(t); + } + if_unlock(t); + return 1; + signal: + return 0; +} + +static int pktgen_wait_all_threads_run(void) +{ + struct pktgen_thread *t = pktgen_threads; + int sig = 1; + + while (t) { + sig = pktgen_wait_thread_run(t); + if( sig == 0 ) break; + thread_lock(); + t=t->next; + thread_unlock(); + } + if(sig == 0) { + thread_lock(); + while (t) { + t->control |= (T_STOP); + t=t->next; + } + thread_unlock(); + } + return sig; +} + +static void pktgen_run_all_threads(void) +{ + struct pktgen_thread *t = pktgen_threads; + + PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n")); + + thread_lock(); + + while(t) { + t->control |= (T_RUN); + t = t->next; + } + thread_unlock(); + + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(HZ/8); /* Propagate thread->control */ + + pktgen_wait_all_threads_run(); +} + + +static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) +{ + __u64 total_us, bps, mbps, pps, idle; + char *p = pkt_dev->result; + + total_us = pkt_dev->stopped_at - pkt_dev->started_at; + + idle = pkt_dev->idle_acc; + + p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", + (unsigned long long) total_us, + (unsigned long long)(total_us - idle), + (unsigned long long) idle, + (unsigned long long) pkt_dev->sofar, + pkt_dev->cur_pkt_size, nr_frags); + + pps = pkt_dev->sofar * USEC_PER_SEC; + + while ((total_us >> 32) != 0) { + pps >>= 1; + total_us >>= 1; + } + + do_div(pps, total_us); + + bps = pps * 8 * pkt_dev->cur_pkt_size; + + mbps = bps; + do_div(mbps, 1000000); + p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", + (unsigned long long) pps, + (unsigned long long) mbps, + (unsigned long long) bps, + (unsigned long long) pkt_dev->errors); +} + + +/* Set stopped-at timer, remove from running list, do counters & statistics */ + +static int pktgen_stop_device(struct pktgen_dev *pkt_dev) +{ + + if (!pkt_dev->running) { + printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname); + return -EINVAL; + } + + pkt_dev->stopped_at = getCurUs(); + pkt_dev->running = 0; + + show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags); + + if (pkt_dev->skb) + kfree_skb(pkt_dev->skb); + + pkt_dev->skb = NULL; + + return 0; +} + +static struct pktgen_dev *next_to_run(struct pktgen_thread *t ) +{ + struct pktgen_dev *next, *best = NULL; + + if_lock(t); + + for(next=t->if_list; next ; next=next->next) { + if(!next->running) continue; + if(best == NULL) best=next; + else if ( next->next_tx_us < best->next_tx_us) + best = next; + } + if_unlock(t); + return best; +} + +static void pktgen_stop(struct pktgen_thread *t) { + struct pktgen_dev *next = NULL; + + PG_DEBUG(printk("pktgen: entering pktgen_stop.\n")); + + if_lock(t); + + for(next=t->if_list; next; next=next->next) + pktgen_stop_device(next); + + if_unlock(t); +} + +static void pktgen_rem_all_ifs(struct pktgen_thread *t) +{ + struct pktgen_dev *cur, *next = NULL; + + /* Remove all devices, free mem */ + + if_lock(t); + + for(cur=t->if_list; cur; cur=next) { + next = cur->next; + pktgen_remove_device(t, cur); + } + + if_unlock(t); +} + +static void pktgen_rem_thread(struct pktgen_thread *t) +{ + /* Remove from the thread list */ + + struct pktgen_thread *tmp = pktgen_threads; + + if (strlen(t->fname)) + remove_proc_entry(t->fname, NULL); + + thread_lock(); + + if (tmp == t) + pktgen_threads = tmp->next; + else { + while (tmp) { + if (tmp->next == t) { + tmp->next = t->next; + t->next = NULL; + break; + } + tmp = tmp->next; + } + } + thread_unlock(); +} + +static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) +{ + struct net_device *odev = NULL; + __u64 idle_start = 0; + int ret; + + odev = pkt_dev->odev; + + if (pkt_dev->delay_us || pkt_dev->delay_ns) { + u64 now; + + now = getCurUs(); + if (now < pkt_dev->next_tx_us) + spin(pkt_dev, pkt_dev->next_tx_us); + + /* This is max DELAY, this has special meaning of + * "never transmit" + */ + if (pkt_dev->delay_us == 0x7FFFFFFF) { + pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; + pkt_dev->next_tx_ns = pkt_dev->delay_ns; + goto out; } - if (strlen(pginfos[i].busy_fname)) { - remove_proc_entry(pginfos[i].busy_fname, NULL); + } + + if (netif_queue_stopped(odev) || need_resched()) { + idle_start = getCurUs(); + + if (!netif_running(odev)) { + pktgen_stop_device(pkt_dev); + goto out; + } + if (need_resched()) + schedule(); + + pkt_dev->idle_acc += getCurUs() - idle_start; + + if (netif_queue_stopped(odev)) { + pkt_dev->next_tx_us = getCurUs(); /* TODO */ + pkt_dev->next_tx_ns = 0; + goto out; /* Try the next interface */ + } + } + + if (pkt_dev->last_ok || !pkt_dev->skb) { + if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) { + /* build a new pkt */ + if (pkt_dev->skb) + kfree_skb(pkt_dev->skb); + + pkt_dev->skb = fill_packet(odev, pkt_dev); + if (pkt_dev->skb == NULL) { + printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n"); + schedule(); + pkt_dev->clone_count--; /* back out increment, OOM */ + goto out; + } + pkt_dev->allocated_skbs++; + pkt_dev->clone_count = 0; /* reset counter */ + } + } + + spin_lock_bh(&odev->xmit_lock); + if (!netif_queue_stopped(odev)) { + + atomic_inc(&(pkt_dev->skb->users)); +retry_now: + ret = odev->hard_start_xmit(pkt_dev->skb, odev); + if (likely(ret == NETDEV_TX_OK)) { + pkt_dev->last_ok = 1; + pkt_dev->sofar++; + pkt_dev->seq_num++; + pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; + + } else if (ret == NETDEV_TX_LOCKED + && (odev->features & NETIF_F_LLTX)) { + cpu_relax(); + goto retry_now; + } else { /* Retry it next time */ + + atomic_dec(&(pkt_dev->skb->users)); + + if (debug && net_ratelimit()) + printk(KERN_INFO "pktgen: Hard xmit error\n"); + + pkt_dev->errors++; + pkt_dev->last_ok = 0; + } + + pkt_dev->next_tx_us = getCurUs(); + pkt_dev->next_tx_ns = 0; + + pkt_dev->next_tx_us += pkt_dev->delay_us; + pkt_dev->next_tx_ns += pkt_dev->delay_ns; + + if (pkt_dev->next_tx_ns > 1000) { + pkt_dev->next_tx_us++; + pkt_dev->next_tx_ns -= 1000; + } + } + + else { /* Retry it next time */ + pkt_dev->last_ok = 0; + pkt_dev->next_tx_us = getCurUs(); /* TODO */ + pkt_dev->next_tx_ns = 0; + } + + spin_unlock_bh(&odev->xmit_lock); + + /* If pkt_dev->count is zero, then run forever */ + if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { + if (atomic_read(&(pkt_dev->skb->users)) != 1) { + idle_start = getCurUs(); + while (atomic_read(&(pkt_dev->skb->users)) != 1) { + if (signal_pending(current)) { + break; + } + schedule(); + } + pkt_dev->idle_acc += getCurUs() - idle_start; + } + + /* Done with this */ + pktgen_stop_device(pkt_dev); + } + out:; + } + +/* + * Main loop of the thread goes here + */ + +static void pktgen_thread_worker(struct pktgen_thread *t) +{ + DEFINE_WAIT(wait); + struct pktgen_dev *pkt_dev = NULL; + int cpu = t->cpu; + sigset_t tmpsig; + u32 max_before_softirq; + u32 tx_since_softirq = 0; + + daemonize("pktgen/%d", cpu); + + /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */ + + spin_lock_irq(¤t->sighand->siglock); + tmpsig = current->blocked; + siginitsetinv(¤t->blocked, + sigmask(SIGKILL) | + sigmask(SIGSTOP)| + sigmask(SIGTERM)); + + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + /* Migrate to the right CPU */ + set_cpus_allowed(current, cpumask_of_cpu(cpu)); + if (smp_processor_id() != cpu) + BUG(); + + init_waitqueue_head(&t->queue); + + t->control &= ~(T_TERMINATE); + t->control &= ~(T_RUN); + t->control &= ~(T_STOP); + t->control &= ~(T_REMDEV); + + t->pid = current->pid; + + PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid)); + + max_before_softirq = t->max_before_softirq; + + __set_current_state(TASK_INTERRUPTIBLE); + mb(); + + while (1) { + + __set_current_state(TASK_RUNNING); + + /* + * Get next dev to xmit -- if any. + */ + + pkt_dev = next_to_run(t); + + if (pkt_dev) { + + pktgen_xmit(pkt_dev); + + /* + * We like to stay RUNNING but must also give + * others fair share. + */ + + tx_since_softirq += pkt_dev->last_ok; + + if (tx_since_softirq > max_before_softirq) { + if (local_softirq_pending()) + do_softirq(); + tx_since_softirq = 0; + } + } else { + prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE); + schedule_timeout(HZ/10); + finish_wait(&(t->queue), &wait); + } + + /* + * Back from sleep, either due to the timeout or signal. + * We check if we have any "posted" work for us. + */ + + if (t->control & T_TERMINATE || signal_pending(current)) + /* we received a request to terminate ourself */ + break; + + + if(t->control & T_STOP) { + pktgen_stop(t); + t->control &= ~(T_STOP); + } + + if(t->control & T_RUN) { + pktgen_run(t); + t->control &= ~(T_RUN); + } + + if(t->control & T_REMDEV) { + pktgen_rem_all_ifs(t); + t->control &= ~(T_REMDEV); + } + + if (need_resched()) + schedule(); + } + + PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name)); + pktgen_stop(t); + + PG_DEBUG(printk("pktgen: %s removing all device\n", t->name)); + pktgen_rem_all_ifs(t); + + PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name)); + pktgen_rem_thread(t); +} + +static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname) +{ + struct pktgen_dev *pkt_dev = NULL; + if_lock(t); + + for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) { + if (strcmp(pkt_dev->ifname, ifname) == 0) { + break; + } + } + + if_unlock(t); + PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev)); + return pkt_dev; +} + +/* + * Adds a dev at front of if_list. + */ + +static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) +{ + int rv = 0; + + if_lock(t); + + if (pkt_dev->pg_thread) { + printk("pktgen: ERROR: already assigned to a thread.\n"); + rv = -EBUSY; + goto out; + } + pkt_dev->next =t->if_list; t->if_list=pkt_dev; + pkt_dev->pg_thread = t; + pkt_dev->running = 0; + + out: + if_unlock(t); + return rv; +} + +/* Called under thread lock */ + +static int pktgen_add_device(struct pktgen_thread *t, const char* ifname) +{ + struct pktgen_dev *pkt_dev; + + /* We don't allow a device to be on several threads */ + + if( (pkt_dev = __pktgen_NN_threads(ifname, FIND)) == NULL) { + + pkt_dev = kmalloc(sizeof(struct pktgen_dev), GFP_KERNEL); + if (!pkt_dev) + return -ENOMEM; + + memset(pkt_dev, 0, sizeof(struct pktgen_dev)); + + pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state)); + if (pkt_dev->flows == NULL) { + kfree(pkt_dev); + return -ENOMEM; + } + memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state)); + + pkt_dev->min_pkt_size = ETH_ZLEN; + pkt_dev->max_pkt_size = ETH_ZLEN; + pkt_dev->nfrags = 0; + pkt_dev->clone_skb = pg_clone_skb_d; + pkt_dev->delay_us = pg_delay_d / 1000; + pkt_dev->delay_ns = pg_delay_d % 1000; + pkt_dev->count = pg_count_d; + pkt_dev->sofar = 0; + pkt_dev->udp_src_min = 9; /* sink port */ + pkt_dev->udp_src_max = 9; + pkt_dev->udp_dst_min = 9; + pkt_dev->udp_dst_max = 9; + + strncpy(pkt_dev->ifname, ifname, 31); + sprintf(pkt_dev->fname, "net/%s/%s", PG_PROC_DIR, ifname); + + if (! pktgen_setup_dev(pkt_dev)) { + printk("pktgen: ERROR: pktgen_setup_dev failed.\n"); + if (pkt_dev->flows) + vfree(pkt_dev->flows); + kfree(pkt_dev); + return -ENODEV; + } + + pkt_dev->proc_ent = create_proc_entry(pkt_dev->fname, 0600, NULL); + if (!pkt_dev->proc_ent) { + printk("pktgen: cannot create %s procfs entry.\n", pkt_dev->fname); + if (pkt_dev->flows) + vfree(pkt_dev->flows); + kfree(pkt_dev); + return -EINVAL; + } + pkt_dev->proc_ent->read_proc = proc_if_read; + pkt_dev->proc_ent->write_proc = proc_if_write; + pkt_dev->proc_ent->data = (void*)(pkt_dev); + pkt_dev->proc_ent->owner = THIS_MODULE; + + return add_dev_to_thread(t, pkt_dev); + } + else { + printk("pktgen: ERROR: interface already used.\n"); + return -EBUSY; + } +} + +static struct pktgen_thread *pktgen_find_thread(const char* name) +{ + struct pktgen_thread *t = NULL; + + thread_lock(); + + t = pktgen_threads; + while (t) { + if (strcmp(t->name, name) == 0) + break; + + t = t->next; + } + thread_unlock(); + return t; +} + +static int pktgen_create_thread(const char* name, int cpu) +{ + struct pktgen_thread *t = NULL; + + if (strlen(name) > 31) { + printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n"); + return -EINVAL; + } + + if (pktgen_find_thread(name)) { + printk("pktgen: ERROR: thread: %s already exists\n", name); + return -EINVAL; + } + + t = (struct pktgen_thread*)(kmalloc(sizeof(struct pktgen_thread), GFP_KERNEL)); + if (!t) { + printk("pktgen: ERROR: out of memory, can't create new thread.\n"); + return -ENOMEM; + } + + memset(t, 0, sizeof(struct pktgen_thread)); + strcpy(t->name, name); + spin_lock_init(&t->if_lock); + t->cpu = cpu; + + sprintf(t->fname, "net/%s/%s", PG_PROC_DIR, t->name); + t->proc_ent = create_proc_entry(t->fname, 0600, NULL); + if (!t->proc_ent) { + printk("pktgen: cannot create %s procfs entry.\n", t->fname); + kfree(t); + return -EINVAL; + } + t->proc_ent->read_proc = proc_thread_read; + t->proc_ent->write_proc = proc_thread_write; + t->proc_ent->data = (void*)(t); + t->proc_ent->owner = THIS_MODULE; + + t->next = pktgen_threads; + pktgen_threads = t; + + if (kernel_thread((void *) pktgen_thread_worker, (void *) t, + CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0) + printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu); + + return 0; +} + +/* + * Removes a device from the thread if_list. + */ +static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) +{ + struct pktgen_dev *i, *prev = NULL; + + i = t->if_list; + + while(i) { + if(i == pkt_dev) { + if(prev) prev->next = i->next; + else t->if_list = NULL; + break; } + prev = i; + i=i->next; } +} + +static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) +{ + + PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev)); + + if (pkt_dev->running) { + printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n"); + pktgen_stop_device(pkt_dev); + } + + /* Dis-associate from the interface */ + + if (pkt_dev->odev) { + dev_put(pkt_dev->odev); + pkt_dev->odev = NULL; + } + + /* And update the thread if_list */ + + _rem_dev_from_if_list(t, pkt_dev); + + /* Clean up proc file system */ + + if (strlen(pkt_dev->fname)) + remove_proc_entry(pkt_dev->fname, NULL); + + if (pkt_dev->flows) + vfree(pkt_dev->flows); + kfree(pkt_dev); + return 0; +} + +static int __init pg_init(void) +{ + int cpu; + printk(version); + + module_fname[0] = 0; + + create_proc_dir(); + + sprintf(module_fname, "net/%s/pgctrl", PG_PROC_DIR); + module_proc_ent = create_proc_entry(module_fname, 0600, NULL); + if (!module_proc_ent) { + printk("pktgen: ERROR: cannot create %s procfs entry.\n", module_fname); + return -EINVAL; + } + + module_proc_ent->proc_fops = &pktgen_fops; + module_proc_ent->data = NULL; + + /* Register us to receive netdevice events */ + register_netdevice_notifier(&pktgen_notifier_block); + + for (cpu = 0; cpu < NR_CPUS ; cpu++) { + char buf[30]; + + if (!cpu_online(cpu)) + continue; + + sprintf(buf, "kpktgend_%i", cpu); + pktgen_create_thread(buf, cpu); + } + return 0; +} + +static void __exit pg_cleanup(void) +{ + wait_queue_head_t queue; + init_waitqueue_head(&queue); + + /* Stop all interfaces & threads */ + + while (pktgen_threads) { + struct pktgen_thread *t = pktgen_threads; + pktgen_threads->control |= (T_TERMINATE); + + wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ); + } + + /* Un-register us from receiving netdevice events */ + unregister_netdevice_notifier(&pktgen_notifier_block); + + /* Clean up proc file system */ + + remove_proc_entry(module_fname, NULL); + remove_proc_dir(); } -module_init(init); -module_exit(cleanup); + +module_init(pg_init); +module_exit(pg_cleanup); MODULE_AUTHOR("Robert Olsson