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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/core/pktgen.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/core/pktgen.c')
-rw-r--r--net/core/pktgen.c3132
1 files changed, 3132 insertions, 0 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
new file mode 100644
index 000000000000..c57b06bc79f3
--- /dev/null
+++ b/net/core/pktgen.c
@@ -0,0 +1,3132 @@
+/*
+ * Authors:
+ * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
+ * Uppsala University and
+ * Swedish University of Agricultural Sciences
+ *
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ * Ben Greear <greearb@candelatech.com>
+ * Jens Låås <jens.laas@data.slu.se>
+ *
+ * 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, delay (to hard_xmit), number of packets, and whether
+ * to use multiple SKBs or just the same one.
+ * pktgen uses the installed interface's output routine.
+ *
+ * Additional hacking by:
+ *
+ * Jens.Laas@data.slu.se
+ * Improved by ANK. 010120.
+ * Improved by ANK even more. 010212.
+ * MAC address typo fixed. 010417 --ro
+ * Integrated. 020301 --DaveM
+ * Added multiskb option 020301 --DaveM
+ * Scaling of results. 020417--sigurdur@linpro.no
+ * Significant re-work of the module:
+ * * Convert to threaded model to more efficiently be able to transmit
+ * and receive on multiple interfaces at once.
+ * * Converted many counters to __u64 to allow longer runs.
+ * * Allow configuration of ranges, like min/max IP address, MACs,
+ * and UDP-ports, for both source and destination, and can
+ * set to use a random distribution or sequentially walk the range.
+ * * Can now change most values after starting.
+ * * Place 12-byte packet in UDP payload with magic number,
+ * sequence number, and timestamp.
+ * * Add receiver code that detects dropped pkts, re-ordered pkts, and
+ * latencies (with micro-second) precision.
+ * * Add IOCTL interface to easily get counters & configuration.
+ * --Ben Greear <greearb@candelatech.com>
+ *
+ * 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
+ *
+ * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
+ * mistakes. Also merged in DaveM's patch in the -pre6 patch.
+ * --Ben Greear <greearb@candelatech.com>
+ *
+ * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
+ *
+ *
+ * 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 <grundler@parisc-linux.org>
+ *
+ * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
+ * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
+ *
+ * New xmit() return, do_div and misc clean up by Stephen Hemminger
+ * <shemminger@osdl.org> 040923
+ *
+ * Rany Dunlap fixed u64 printk compiler waring
+ *
+ * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
+ * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 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 <nacc@us.ibm.com>
+ * 050103
+ */
+#include <linux/sys.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/smp_lock.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/inet.h>
+#include <linux/inetdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/if_arp.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/proc_fs.h>
+#include <linux/wait.h>
+#include <net/checksum.h>
+#include <net/ipv6.h>
+#include <net/addrconf.h>
+#include <asm/byteorder.h>
+#include <linux/rcupdate.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+#include <asm/div64.h> /* do_div */
+#include <asm/timex.h>
+
+
+#define VERSION "pktgen v2.61: Packet Generator for packet performance testing.\n"
+
+/* #define PG_DEBUG(a) a */
+#define PG_DEBUG(a)
+
+/* 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_TXSIZE_RND (1<<6) /* Transmit size is random */
+#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
+
+/* 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.
+ */
+
+ 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 tv_sec;
+ __u32 tv_usec;
+};
+
+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 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
+*/
+
+#define PG_DIV 0
+
+/* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
+ * 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;
+ }
+}
+
+/* End of hacks to deal with 64-bit math on x86 */
+
+/** 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;
+}
+
+
+/** 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;
+}
+
+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 inline __u64 pg_div64(__u64 n, __u64 base)
+{
+ __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__)
+
+ do_div(tmp, base);
+#else
+ tmp = divremdi3(n, base, PG_DIV);
+#endif
+ return tmp;
+}
+
+static inline u32 pktgen_random(void)
+{
+#if 0
+ __u32 n;
+ get_random_bytes(&n, 4);
+ return n;
+#else
+ return net_random();
+#endif
+}
+
+static inline __u64 getCurMs(void)
+{
+ 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);
+}
+
+static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
+{
+ return tv_to_us(a) - tv_to_us(b);
+}
+
+
+/* old include end */
+
+static char version[] __initdata = VERSION;
+
+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 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]);
+
+/* 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;
+
+static spinlock_t _thread_lock = SPIN_LOCK_UNLOCKED;
+static struct pktgen_thread *pktgen_threads = NULL;
+
+static char module_fname[128];
+static struct proc_dir_entry *module_proc_ent = NULL;
+
+static struct notifier_block pktgen_notifier_block = {
+ .notifier_call = pktgen_device_event,
+};
+
+static struct file_operations pktgen_fops = {
+ .read = proc_pgctrl_read,
+ .write = proc_pgctrl_write,
+ /* .ioctl = pktgen_ioctl, later maybe */
+};
+
+/*
+ * /proc handling functions
+ *
+ */
+
+static struct proc_dir_entry *pg_proc_dir = NULL;
+static int proc_pgctrl_read_eof=0;
+
+static ssize_t proc_pgctrl_read(struct file* file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ char data[200];
+ int len = 0;
+
+ if(proc_pgctrl_read_eof) {
+ proc_pgctrl_read_eof=0;
+ len = 0;
+ goto out;
+ }
+
+ sprintf(data, "%s", VERSION);
+
+ len = strlen(data);
+
+ if(len > count) {
+ len =-EFAULT;
+ goto out;
+ }
+
+ if (copy_to_user(buf, data, len)) {
+ len =-EFAULT;
+ goto out;
+ }
+
+ *ppos += len;
+ proc_pgctrl_read_eof=1; /* EOF next call */
+
+ out:
+ return len;
+}
+
+static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ char *data = NULL;
+ int err = 0;
+
+ if (!capable(CAP_NET_ADMIN)){
+ err = -EPERM;
+ goto out;
+ }
+
+ data = (void*)vmalloc ((unsigned int)count);
+
+ if(!data) {
+ err = -ENOMEM;
+ goto out;
+ }
+ if (copy_from_user(data, buf, count)) {
+ err =-EFAULT;
+ goto out_free;
+ }
+ data[count-1] = 0; /* Make string */
+
+ if (!strcmp(data, "stop"))
+ pktgen_stop_all_threads_ifs();
+
+ else if (!strcmp(data, "start"))
+ pktgen_run_all_threads();
+
+ else
+ printk("pktgen: Unknown command: %s\n", data);
+
+ err = count;
+
+ out_free:
+ vfree (data);
+ out:
+ return err;
+}
+
+static int proc_if_read(char *buf , char **start, off_t offset,
+ int len, int *eof, void *data)
+{
+ 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);
+
+ 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);
+
+ 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);
+
+
+ p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n",
+ pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
+
+ p += sprintf(p, " flows: %u\n", pkt_dev->nflows);
+
+ if (pkt_dev->result[0])
+ p += sprintf(p, "Result: %s\n", pkt_dev->result);
+ else
+ p += sprintf(p, "Result: Idle\n");
+ *eof = 1;
+
+ 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) {
+ case '\"':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ case '=':
+ break;
+ default:
+ goto done;
+ };
+ }
+done:
+ return i;
+}
+
+static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
+ unsigned long *num)
+{
+ int i = 0;
+ *num = 0;
+
+ for(; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ if ((c >= '0') && (c <= '9')) {
+ *num *= 10;
+ *num += c -'0';
+ } else
+ break;
+ }
+ return i;
+}
+
+static int strn_len(const char __user *user_buffer, unsigned int maxlen)
+{
+ int i = 0;
+
+ for(; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ switch (c) {
+ case '\"':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ goto done_str;
+ break;
+ default:
+ break;
+ };
+ }
+done_str:
+
+ return i;
+}
+
+static 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;
+ 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) {
+ printk("pktgen: wrong command format\n");
+ return -EINVAL;
+ }
+
+ max = count - i;
+ tmp = count_trail_chars(&user_buffer[i], max);
+ if (tmp < 0) {
+ printk("pktgen: illegal format\n");
+ return tmp;
+ }
+ i += tmp;
+
+ /* Read variable name */
+
+ len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ if (len < 0) { return len; }
+ memset(name, 0, sizeof(name));
+ if (copy_from_user(name, &user_buffer[i], len) )
+ return -EFAULT;
+ i += len;
+
+ max = count -i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (debug) {
+ char tb[count + 1];
+ if (copy_from_user(tb, user_buffer, count))
+ return -EFAULT;
+ tb[count] = 0;
+ printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb);
+ }
+
+ if (!strcmp(name, "min_pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value < 14+20+8)
+ value = 14+20+8;
+ if (value != pkt_dev->min_pkt_size) {
+ pkt_dev->min_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size);
+ return count;
+ }
+
+ if (!strcmp(name, "max_pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value < 14+20+8)
+ value = 14+20+8;
+ if (value != pkt_dev->max_pkt_size) {
+ pkt_dev->max_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size);
+ return count;
+ }
+
+ /* Shortcut for min = max */
+
+ if (!strcmp(name, "pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value < 14+20+8)
+ value = 14+20+8;
+ if (value != pkt_dev->min_pkt_size) {
+ pkt_dev->min_pkt_size = value;
+ pkt_dev->max_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
+ return count;
+ }
+
+ if (!strcmp(name, "debug")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ debug = value;
+ sprintf(pg_result, "OK: debug=%u", debug);
+ return count;
+ }
+
+ if (!strcmp(name, "frags")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->nfrags = value;
+ sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
+ return count;
+ }
+ if (!strcmp(name, "delay")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value == 0x7FFFFFFF) {
+ pkt_dev->delay_us = 0x7FFFFFFF;
+ pkt_dev->delay_ns = 0;
+ } else {
+ pkt_dev->delay_us = value / 1000;
+ pkt_dev->delay_ns = value % 1000;
+ }
+ sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns);
+ return count;
+ }
+ if (!strcmp(name, "udp_src_min")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_src_min) {
+ pkt_dev->udp_src_min = value;
+ pkt_dev->cur_udp_src = value;
+ }
+ sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
+ return count;
+ }
+ if (!strcmp(name, "udp_dst_min")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_dst_min) {
+ pkt_dev->udp_dst_min = value;
+ pkt_dev->cur_udp_dst = value;
+ }
+ sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
+ return count;
+ }
+ if (!strcmp(name, "udp_src_max")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_src_max) {
+ pkt_dev->udp_src_max = value;
+ pkt_dev->cur_udp_src = value;
+ }
+ sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
+ return count;
+ }
+ if (!strcmp(name, "udp_dst_max")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_dst_max) {
+ pkt_dev->udp_dst_max = value;
+ pkt_dev->cur_udp_dst = value;
+ }
+ sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
+ return count;
+ }
+ if (!strcmp(name, "clone_skb")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->clone_skb = value;
+
+ sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
+ return count;
+ }
+ if (!strcmp(name, "count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->count = value;
+ sprintf(pg_result, "OK: count=%llu",
+ (unsigned long long) pkt_dev->count);
+ return count;
+ }
+ if (!strcmp(name, "src_mac_count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (pkt_dev->src_mac_count != value) {
+ pkt_dev->src_mac_count = value;
+ pkt_dev->cur_src_mac_offset = 0;
+ }
+ sprintf(pg_result, "OK: src_mac_count=%d", pkt_dev->src_mac_count);
+ return count;
+ }
+ if (!strcmp(name, "dst_mac_count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (pkt_dev->dst_mac_count != value) {
+ pkt_dev->dst_mac_count = value;
+ pkt_dev->cur_dst_mac_offset = 0;
+ }
+ sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count);
+ return count;
+ }
+ if (!strcmp(name, "flag")) {
+ char f[32];
+ memset(f, 0, 32);
+ len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ if (len < 0) { return len; }
+ if (copy_from_user(f, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+ if (strcmp(f, "IPSRC_RND") == 0)
+ pkt_dev->flags |= F_IPSRC_RND;
+
+ else if (strcmp(f, "!IPSRC_RND") == 0)
+ pkt_dev->flags &= ~F_IPSRC_RND;
+
+ else if (strcmp(f, "TXSIZE_RND") == 0)
+ pkt_dev->flags |= F_TXSIZE_RND;
+
+ else if (strcmp(f, "!TXSIZE_RND") == 0)
+ pkt_dev->flags &= ~F_TXSIZE_RND;
+
+ else if (strcmp(f, "IPDST_RND") == 0)
+ pkt_dev->flags |= F_IPDST_RND;
+
+ else if (strcmp(f, "!IPDST_RND") == 0)
+ pkt_dev->flags &= ~F_IPDST_RND;
+
+ else if (strcmp(f, "UDPSRC_RND") == 0)
+ pkt_dev->flags |= F_UDPSRC_RND;
+
+ else if (strcmp(f, "!UDPSRC_RND") == 0)
+ pkt_dev->flags &= ~F_UDPSRC_RND;
+
+ else if (strcmp(f, "UDPDST_RND") == 0)
+ pkt_dev->flags |= F_UDPDST_RND;
+
+ else if (strcmp(f, "!UDPDST_RND") == 0)
+ pkt_dev->flags &= ~F_UDPDST_RND;
+
+ else if (strcmp(f, "MACSRC_RND") == 0)
+ pkt_dev->flags |= F_MACSRC_RND;
+
+ else if (strcmp(f, "!MACSRC_RND") == 0)
+ pkt_dev->flags &= ~F_MACSRC_RND;
+
+ else if (strcmp(f, "MACDST_RND") == 0)
+ pkt_dev->flags |= F_MACDST_RND;
+
+ else if (strcmp(f, "!MACDST_RND") == 0)
+ pkt_dev->flags &= ~F_MACDST_RND;
+
+ else {
+ sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
+ f,
+ "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
+ return count;
+ }
+ sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
+ return count;
+ }
+ if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
+ if (len < 0) { return len; }
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->dst_min) != 0) {
+ memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
+ strncpy(pkt_dev->dst_min, buf, len);
+ pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
+ pkt_dev->cur_daddr = pkt_dev->daddr_min;
+ }
+ if(debug)
+ printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min);
+ i += len;
+ sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
+ return count;
+ }
+ if (!strcmp(name, "dst_max")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
+ if (len < 0) { return len; }
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->dst_max) != 0) {
+ memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
+ strncpy(pkt_dev->dst_max, buf, len);
+ pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
+ pkt_dev->cur_daddr = pkt_dev->daddr_max;
+ }
+ if(debug)
+ printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max);
+ i += len;
+ sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
+ return count;
+ }
+ if (!strcmp(name, "dst6")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
+
+ ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
+
+ if(debug)
+ printk("pktgen: dst6 set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "dst6_min")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
+
+ ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr);
+ if(debug)
+ printk("pktgen: dst6_min set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6_min=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "dst6_max")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
+
+ if(debug)
+ printk("pktgen: dst6_max set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6_max=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "src6")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
+
+ ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
+
+ if(debug)
+ printk("pktgen: src6 set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: src6=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "src_min")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
+ if (len < 0) { return len; }
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->src_min) != 0) {
+ memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
+ strncpy(pkt_dev->src_min, buf, len);
+ pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
+ pkt_dev->cur_saddr = pkt_dev->saddr_min;
+ }
+ if(debug)
+ printk("pktgen: src_min set to: %s\n", pkt_dev->src_min);
+ i += len;
+ sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
+ return count;
+ }
+ if (!strcmp(name, "src_max")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
+ if (len < 0) { return len; }
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->src_max) != 0) {
+ memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
+ strncpy(pkt_dev->src_max, buf, len);
+ pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
+ pkt_dev->cur_saddr = pkt_dev->saddr_max;
+ }
+ if(debug)
+ printk("pktgen: src_max set to: %s\n", pkt_dev->src_max);
+ i += len;
+ sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
+ return count;
+ }
+ if (!strcmp(name, "dst_mac")) {
+ char *v = valstr;
+ unsigned char old_dmac[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; }
+ memset(valstr, 0, sizeof(valstr));
+ if( copy_from_user(valstr, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) {
+ if (*v >= '0' && *v <= '9') {
+ *m *= 16;
+ *m += *v - '0';
+ }
+ if (*v >= 'A' && *v <= 'F') {
+ *m *= 16;
+ *m += *v - 'A' + 10;
+ }
+ if (*v >= 'a' && *v <= 'f') {
+ *m *= 16;
+ *m += *v - 'a' + 10;
+ }
+ if (*v == ':') {
+ m++;
+ *m = 0;
+ }
+ }
+
+ /* Set up Dest MAC */
+ if (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, "src_mac")) {
+ char *v = valstr;
+ unsigned char *m = pkt_dev->src_mac;
+
+ len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ if (len < 0) { return len; }
+ memset(valstr, 0, sizeof(valstr));
+ if( copy_from_user(valstr, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) {
+ if (*v >= '0' && *v <= '9') {
+ *m *= 16;
+ *m += *v - '0';
+ }
+ if (*v >= 'A' && *v <= 'F') {
+ *m *= 16;
+ *m += *v - 'A' + 10;
+ }
+ if (*v >= 'a' && *v <= 'f') {
+ *m *= 16;
+ *m += *v - 'a' + 10;
+ }
+ if (*v == ':') {
+ m++;
+ *m = 0;
+ }
+ }
+
+ sprintf(pg_result, "OK: srcmac");
+ return count;
+ }
+
+ if (!strcmp(name, "clear_counters")) {
+ pktgen_clear_counters(pkt_dev);
+ sprintf(pg_result, "OK: Clearing counters.\n");
+ return count;
+ }
+
+ if (!strcmp(name, "flows")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value > MAX_CFLOWS)
+ value = MAX_CFLOWS;
+
+ pkt_dev->cflows = value;
+ sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
+ return count;
+ }
+
+ if (!strcmp(name, "flowlen")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->lflow = value;
+ sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
+ return count;
+ }
+
+ sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
+ return -EINVAL;
+}
+
+static int proc_thread_read(char *buf , char **start, off_t offset,
+ int len, int *eof, void *data)
+{
+ char *p;
+ struct pktgen_thread *t = (struct pktgen_thread*)(data);
+ struct pktgen_dev *pkt_dev = NULL;
+
+
+ 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 proc_thread_write(struct file *file, const char __user *user_buffer,
+ unsigned long count, void *data)
+{
+ 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 */
+
+ len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ if (len < 0)
+ return len;
+
+ memset(name, 0, sizeof(name));
+ if (copy_from_user(name, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ max = count -i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (debug)
+ printk("pktgen: t=%s, count=%lu\n", name, count);
+
+
+ t = (struct pktgen_thread*)(data);
+ if(!t) {
+ printk("pktgen: ERROR: No thread\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pg_result = &(t->result[0]);
+
+ if (!strcmp(name, "add_device")) {
+ char f[32];
+ memset(f, 0, 32);
+ len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ if (len < 0) {
+ ret = len;
+ goto out;
+ }
+ if( copy_from_user(f, &user_buffer[i], len) )
+ return -EFAULT;
+ i += len;
+ thread_lock();
+ pktgen_add_device(t, f);
+ thread_unlock();
+ ret = count;
+ sprintf(pg_result, "OK: add_device=%s", f);
+ goto out;
+ }
+
+ if (!strcmp(name, "rem_device_all")) {
+ thread_lock();
+ t->control |= T_REMDEV;
+ thread_unlock();
+ 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*)&eth[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(&timestamp);
+ pgh->tv_sec = htonl(timestamp.tv_sec);
+ pgh->tv_usec = htonl(timestamp.tv_usec);
+ }
+ pkt_dev->seq_num++;
+
+ return skb;
+}
+
+/*
+ * scan_ip6, fmt_ip taken from dietlibc-0.21
+ * Author Felix von Leitner <felix-dietlibc@fefe.de>
+ *
+ * Slightly modified for kernel.
+ * Should be candidate for net/ipv4/utils.c
+ * --ro
+ */
+
+static unsigned int scan_ip6(const char *s,char ip[16])
+{
+ unsigned int i;
+ unsigned int len=0;
+ unsigned long u;
+ char suffix[16];
+ unsigned int prefixlen=0;
+ unsigned int suffixlen=0;
+ __u32 tmp;
+
+ for (i=0; i<16; i++) ip[i]=0;
+
+ for (;;) {
+ if (*s == ':') {
+ len++;
+ if (s[1] == ':') { /* Found "::", skip to part 2 */
+ s+=2;
+ len++;
+ break;
+ }
+ s++;
+ }
+ {
+ char *tmp;
+ u=simple_strtoul(s,&tmp,16);
+ i=tmp-s;
+ }
+
+ if (!i) return 0;
+ if (prefixlen==12 && s[i]=='.') {
+
+ /* the last 4 bytes may be written as IPv4 address */
+
+ tmp = in_aton(s);
+ memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp));
+ return i+len;
+ }
+ ip[prefixlen++] = (u >> 8);
+ ip[prefixlen++] = (u & 255);
+ s += i; len += i;
+ if (prefixlen==16)
+ return len;
+ }
+
+/* part 2, after "::" */
+ for (;;) {
+ if (*s == ':') {
+ if (suffixlen==0)
+ break;
+ s++;
+ len++;
+ } else if (suffixlen!=0)
+ break;
+ {
+ char *tmp;
+ u=simple_strtol(s,&tmp,16);
+ i=tmp-s;
+ }
+ if (!i) {
+ if (*s) len--;
+ break;
+ }
+ if (suffixlen+prefixlen<=12 && s[i]=='.') {
+ tmp = in_aton(s);
+ memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp));
+ suffixlen+=4;
+ len+=strlen(s);
+ break;
+ }
+ suffix[suffixlen++] = (u >> 8);
+ suffix[suffixlen++] = (u & 255);
+ s += i; len += i;
+ if (prefixlen+suffixlen==16)
+ break;
+ }
+ for (i=0; i<suffixlen; i++)
+ ip[16-suffixlen+i] = suffix[i];
+ return len;
+}
+
+static char tohex(char hexdigit) {
+ return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
+}
+
+static int fmt_xlong(char* s,unsigned int i) {
+ char* bak=s;
+ *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
+ *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
+ *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
+ *s=tohex(i&0xf);
+ return s-bak+1;
+}
+
+static unsigned int fmt_ip6(char *s,const char ip[16]) {
+ unsigned int len;
+ unsigned int i;
+ unsigned int temp;
+ unsigned int compressing;
+ int j;
+
+ len = 0; compressing = 0;
+ for (j=0; j<16; j+=2) {
+
+#ifdef V4MAPPEDPREFIX
+ if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
+ inet_ntoa_r(*(struct in_addr*)(ip+12),s);
+ temp=strlen(s);
+ return len+temp;
+ }
+#endif
+ temp = ((unsigned long) (unsigned char) ip[j] << 8) +
+ (unsigned long) (unsigned char) ip[j+1];
+ if (temp == 0) {
+ if (!compressing) {
+ compressing=1;
+ if (j==0) {
+ *s++=':'; ++len;
+ }
+ }
+ } else {
+ if (compressing) {
+ compressing=0;
+ *s++=':'; ++len;
+ }
+ i = fmt_xlong(s,temp); len += i; s += i;
+ if (j<14) {
+ *s++ = ':';
+ ++len;
+ }
+ }
+ }
+ if (compressing) {
+ *s++=':'; ++len;
+ }
+ *s=0;
+ return len;
+}
+
+static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ struct sk_buff *skb = NULL;
+ __u8 *eth;
+ struct udphdr *udph;
+ int datalen;
+ struct ipv6hdr *iph;
+ struct pktgen_hdr *pgh = NULL;
+
+ 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*)&eth[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(&timestamp);
+ 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 (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(&current->sighand->siglock);
+ tmpsig = current->blocked;
+ siginitsetinv(&current->blocked,
+ sigmask(SIGKILL) |
+ sigmask(SIGSTOP)|
+ sigmask(SIGTERM));
+
+ recalc_sigpending();
+ spin_unlock_irq(&current->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(pg_init);
+module_exit(pg_cleanup);
+
+MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
+MODULE_DESCRIPTION("Packet Generator tool");
+MODULE_LICENSE("GPL");
+module_param(pg_count_d, int, 0);
+module_param(pg_delay_d, int, 0);
+module_param(pg_clone_skb_d, int, 0);
+module_param(debug, int, 0);
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 04:13:16 +0000