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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /net/core/pktgen.c
Initial import
Diffstat (limited to 'net/core/pktgen.c')
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diff --git a/net/core/pktgen.c b/net/core/pktgen.c
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+/*
+ * 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_list is RCU protected, and the if_lock remains to protect updating
+ * of if_list, from "add_device" as it invoked from userspace (via proc write).
+ *
+ * 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 practical 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
+ *
+ * Randy Dunlap fixed u64 printk compiler warning
+ *
+ * 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
+ *
+ * MPLS support by Steven Whitehouse <steve@chygwyn.com>
+ *
+ * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
+ *
+ * Fixed src_mac command to set source mac of packet to value specified in
+ * command by Adit Ranadive <adit.262@gmail.com>
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/sys.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.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/capability.h>
+#include <linux/hrtimer.h>
+#include <linux/freezer.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/list.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/if_vlan.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/wait.h>
+#include <linux/etherdevice.h>
+#include <linux/kthread.h>
+#include <linux/prefetch.h>
+#include <net/net_namespace.h>
+#include <net/checksum.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
+#include <net/ip6_checksum.h>
+#include <net/addrconf.h>
+#ifdef CONFIG_XFRM
+#include <net/xfrm.h>
+#endif
+#include <net/netns/generic.h>
+#include <asm/byteorder.h>
+#include <linux/rcupdate.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/timex.h>
+#include <linux/uaccess.h>
+#include <asm/dma.h>
+#include <asm/div64.h> /* do_div */
+
+#define VERSION "2.74"
+#define IP_NAME_SZ 32
+#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
+#define MPLS_STACK_BOTTOM htonl(0x00000100)
+
+#define func_enter() pr_debug("entering %s\n", __func__);
+
+/* 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 */
+#define F_MPLS_RND (1<<8) /* Random MPLS labels */
+#define F_VID_RND (1<<9) /* Random VLAN ID */
+#define F_SVID_RND (1<<10) /* Random SVLAN ID */
+#define F_FLOW_SEQ (1<<11) /* Sequential flows */
+#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
+#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
+#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
+#define F_NODE (1<<15) /* Node memory alloc*/
+#define F_UDPCSUM (1<<16) /* Include UDP checksum */
+#define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */
+
+/* Thread control flag bits */
+#define T_STOP (1<<0) /* Stop run */
+#define T_RUN (1<<1) /* Start run */
+#define T_REMDEVALL (1<<2) /* Remove all devs */
+#define T_REMDEV (1<<3) /* Remove one dev */
+
+/* If lock -- protects updating of if_list */
+#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 PGCTRL "pgctrl"
+
+#define MAX_CFLOWS 65536
+
+#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
+#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
+
+struct flow_state {
+ __be32 cur_daddr;
+ int count;
+#ifdef CONFIG_XFRM
+ struct xfrm_state *x;
+#endif
+ __u32 flags;
+};
+
+/* flow flag bits */
+#define F_INIT (1<<0) /* flow has been initialized */
+
+struct pktgen_dev {
+ /*
+ * Try to keep frequent/infrequent used vars. separated.
+ */
+ struct proc_dir_entry *entry; /* proc file */
+ struct pktgen_thread *pg_thread;/* the owner */
+ struct list_head list; /* chaining in the thread's run-queue */
+ struct rcu_head rcu; /* freed by RCU */
+
+ int running; /* if 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 removal_mark; /* non-zero => the device is marked for
+ * removal by worker thread */
+
+ int min_pkt_size;
+ int max_pkt_size;
+ int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
+ int nfrags;
+ struct page *page;
+ u64 delay; /* nano-seconds */
+
+ __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, */
+
+ /* runtime counters relating to clone_skb */
+
+ __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
+ */
+ ktime_t next_tx;
+ ktime_t started_at;
+ ktime_t stopped_at;
+ u64 idle_acc; /* nano-seconds */
+
+ __u32 seq_num;
+
+ int clone_skb; /*
+ * Use multiple SKBs during packet gen.
+ * If this number is greater than 1, then
+ * that many copies of the same packet will be
+ * sent before a new packet is allocated.
+ * 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.
+ */
+ __be32 saddr_min; /* inclusive, source IP address */
+ __be32 saddr_max; /* exclusive, source IP address */
+ __be32 daddr_min; /* inclusive, dest IP address */
+ __be32 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 */
+
+ /* DSCP + ECN */
+ __u8 tos; /* six MSB of (former) IPv4 TOS
+ are for dscp codepoint */
+ __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
+ (see RFC 3260, sec. 4) */
+
+ /* MPLS */
+ unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
+ __be32 labels[MAX_MPLS_LABELS];
+
+ /* VLAN/SVLAN (802.1Q/Q-in-Q) */
+ __u8 vlan_p;
+ __u8 vlan_cfi;
+ __u16 vlan_id; /* 0xffff means no vlan tag */
+
+ __u8 svlan_p;
+ __u8 svlan_cfi;
+ __u16 svlan_id; /* 0xffff means no svlan tag */
+
+ __u32 src_mac_count; /* How many MACs to iterate through */
+ __u32 dst_mac_count; /* How many MACs to iterate through */
+
+ unsigned char dst_mac[ETH_ALEN];
+ unsigned char src_mac[ETH_ALEN];
+
+ __u32 cur_dst_mac_offset;
+ __u32 cur_src_mac_offset;
+ __be32 cur_saddr;
+ __be32 cur_daddr;
+ __u16 ip_id;
+ __u16 cur_udp_dst;
+ __u16 cur_udp_src;
+ __u16 cur_queue_map;
+ __u32 cur_pkt_size;
+ __u32 last_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, 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.
+ * Set when the user specifies the out-going
+ * device name (not when the inject is
+ * started as it used to do.)
+ */
+ char odevname[32];
+ struct flow_state *flows;
+ unsigned int cflows; /* Concurrent flows (config) */
+ unsigned int lflow; /* Flow length (config) */
+ unsigned int nflows; /* accumulated flows (stats) */
+ unsigned int curfl; /* current sequenced flow (state)*/
+
+ u16 queue_map_min;
+ u16 queue_map_max;
+ __u32 skb_priority; /* skb priority field */
+ unsigned int burst; /* number of duplicated packets to burst */
+ int node; /* Memory node */
+
+#ifdef CONFIG_XFRM
+ __u8 ipsmode; /* IPSEC mode (config) */
+ __u8 ipsproto; /* IPSEC type (config) */
+ __u32 spi;
+ struct dst_entry dst;
+ struct dst_ops dstops;
+#endif
+ char result[512];
+};
+
+struct pktgen_hdr {
+ __be32 pgh_magic;
+ __be32 seq_num;
+ __be32 tv_sec;
+ __be32 tv_usec;
+};
+
+
+static int pg_net_id __read_mostly;
+
+struct pktgen_net {
+ struct net *net;
+ struct proc_dir_entry *proc_dir;
+ struct list_head pktgen_threads;
+ bool pktgen_exiting;
+};
+
+struct pktgen_thread {
+ spinlock_t if_lock; /* for list of devices */
+ struct list_head if_list; /* All device here */
+ struct list_head th_list;
+ struct task_struct *tsk;
+ char result[512];
+
+ /* Field for thread to receive "posted" events terminate,
+ stop ifs etc. */
+
+ u32 control;
+ int cpu;
+
+ wait_queue_head_t queue;
+ struct completion start_done;
+ struct pktgen_net *net;
+};
+
+#define REMOVE 1
+#define FIND 0
+
+static const char version[] =
+ "Packet Generator for packet performance testing. "
+ "Version: " VERSION "\n";
+
+static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
+static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
+static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
+ const char *ifname, bool exact);
+static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
+static void pktgen_run_all_threads(struct pktgen_net *pn);
+static void pktgen_reset_all_threads(struct pktgen_net *pn);
+static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
+
+static void pktgen_stop(struct pktgen_thread *t);
+static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
+
+/* Module parameters, defaults. */
+static int pg_count_d __read_mostly = 1000;
+static int pg_delay_d __read_mostly;
+static int pg_clone_skb_d __read_mostly;
+static int debug __read_mostly;
+
+static DEFINE_MUTEX(pktgen_thread_lock);
+
+static struct notifier_block pktgen_notifier_block = {
+ .notifier_call = pktgen_device_event,
+};
+
+/*
+ * /proc handling functions
+ *
+ */
+
+static int pgctrl_show(struct seq_file *seq, void *v)
+{
+ seq_puts(seq, version);
+ return 0;
+}
+
+static ssize_t pgctrl_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char data[128];
+ struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (count == 0)
+ return -EINVAL;
+
+ if (count > sizeof(data))
+ count = sizeof(data);
+
+ if (copy_from_user(data, buf, count))
+ return -EFAULT;
+
+ data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
+
+ if (!strcmp(data, "stop"))
+ pktgen_stop_all_threads_ifs(pn);
+
+ else if (!strcmp(data, "start"))
+ pktgen_run_all_threads(pn);
+
+ else if (!strcmp(data, "reset"))
+ pktgen_reset_all_threads(pn);
+
+ else
+ pr_warn("Unknown command: %s\n", data);
+
+ return count;
+}
+
+static int pgctrl_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pgctrl_show, PDE_DATA(inode));
+}
+
+static const struct file_operations pktgen_fops = {
+ .owner = THIS_MODULE,
+ .open = pgctrl_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = pgctrl_write,
+ .release = single_release,
+};
+
+static int pktgen_if_show(struct seq_file *seq, void *v)
+{
+ const struct pktgen_dev *pkt_dev = seq->private;
+ ktime_t stopped;
+ u64 idle;
+
+ seq_printf(seq,
+ "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
+ (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
+ pkt_dev->max_pkt_size);
+
+ seq_printf(seq,
+ " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
+ pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
+ pkt_dev->clone_skb, pkt_dev->odevname);
+
+ seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
+ pkt_dev->lflow);
+
+ seq_printf(seq,
+ " queue_map_min: %u queue_map_max: %u\n",
+ pkt_dev->queue_map_min,
+ pkt_dev->queue_map_max);
+
+ if (pkt_dev->skb_priority)
+ seq_printf(seq, " skb_priority: %u\n",
+ pkt_dev->skb_priority);
+
+ if (pkt_dev->flags & F_IPV6) {
+ seq_printf(seq,
+ " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
+ " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
+ &pkt_dev->in6_saddr,
+ &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
+ &pkt_dev->in6_daddr,
+ &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
+ } else {
+ seq_printf(seq,
+ " dst_min: %s dst_max: %s\n",
+ pkt_dev->dst_min, pkt_dev->dst_max);
+ seq_printf(seq,
+ " src_min: %s src_max: %s\n",
+ pkt_dev->src_min, pkt_dev->src_max);
+ }
+
+ seq_puts(seq, " src_mac: ");
+
+ seq_printf(seq, "%pM ",
+ is_zero_ether_addr(pkt_dev->src_mac) ?
+ pkt_dev->odev->dev_addr : pkt_dev->src_mac);
+
+ seq_puts(seq, "dst_mac: ");
+ seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
+
+ seq_printf(seq,
+ " udp_src_min: %d udp_src_max: %d"
+ " udp_dst_min: %d udp_dst_max: %d\n",
+ pkt_dev->udp_src_min, pkt_dev->udp_src_max,
+ pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
+
+ seq_printf(seq,
+ " src_mac_count: %d dst_mac_count: %d\n",
+ pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
+
+ if (pkt_dev->nr_labels) {
+ unsigned int i;
+ seq_puts(seq, " mpls: ");
+ for (i = 0; i < pkt_dev->nr_labels; i++)
+ seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
+ i == pkt_dev->nr_labels-1 ? "\n" : ", ");
+ }
+
+ if (pkt_dev->vlan_id != 0xffff)
+ seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
+ pkt_dev->vlan_id, pkt_dev->vlan_p,
+ pkt_dev->vlan_cfi);
+
+ if (pkt_dev->svlan_id != 0xffff)
+ seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
+ pkt_dev->svlan_id, pkt_dev->svlan_p,
+ pkt_dev->svlan_cfi);
+
+ if (pkt_dev->tos)
+ seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
+
+ if (pkt_dev->traffic_class)
+ seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
+
+ if (pkt_dev->burst > 1)
+ seq_printf(seq, " burst: %d\n", pkt_dev->burst);
+
+ if (pkt_dev->node >= 0)
+ seq_printf(seq, " node: %d\n", pkt_dev->node);
+
+ seq_puts(seq, " Flags: ");
+
+ if (pkt_dev->flags & F_IPV6)
+ seq_puts(seq, "IPV6 ");
+
+ if (pkt_dev->flags & F_IPSRC_RND)
+ seq_puts(seq, "IPSRC_RND ");
+
+ if (pkt_dev->flags & F_IPDST_RND)
+ seq_puts(seq, "IPDST_RND ");
+
+ if (pkt_dev->flags & F_TXSIZE_RND)
+ seq_puts(seq, "TXSIZE_RND ");
+
+ if (pkt_dev->flags & F_UDPSRC_RND)
+ seq_puts(seq, "UDPSRC_RND ");
+
+ if (pkt_dev->flags & F_UDPDST_RND)
+ seq_puts(seq, "UDPDST_RND ");
+
+ if (pkt_dev->flags & F_UDPCSUM)
+ seq_puts(seq, "UDPCSUM ");
+
+ if (pkt_dev->flags & F_NO_TIMESTAMP)
+ seq_puts(seq, "NO_TIMESTAMP ");
+
+ if (pkt_dev->flags & F_MPLS_RND)
+ seq_puts(seq, "MPLS_RND ");
+
+ if (pkt_dev->flags & F_QUEUE_MAP_RND)
+ seq_puts(seq, "QUEUE_MAP_RND ");
+
+ if (pkt_dev->flags & F_QUEUE_MAP_CPU)
+ seq_puts(seq, "QUEUE_MAP_CPU ");
+
+ if (pkt_dev->cflows) {
+ if (pkt_dev->flags & F_FLOW_SEQ)
+ seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
+ else
+ seq_puts(seq, "FLOW_RND ");
+ }
+
+#ifdef CONFIG_XFRM
+ if (pkt_dev->flags & F_IPSEC_ON) {
+ seq_puts(seq, "IPSEC ");
+ if (pkt_dev->spi)
+ seq_printf(seq, "spi:%u", pkt_dev->spi);
+ }
+#endif
+
+ if (pkt_dev->flags & F_MACSRC_RND)
+ seq_puts(seq, "MACSRC_RND ");
+
+ if (pkt_dev->flags & F_MACDST_RND)
+ seq_puts(seq, "MACDST_RND ");
+
+ if (pkt_dev->flags & F_VID_RND)
+ seq_puts(seq, "VID_RND ");
+
+ if (pkt_dev->flags & F_SVID_RND)
+ seq_puts(seq, "SVID_RND ");
+
+ if (pkt_dev->flags & F_NODE)
+ seq_puts(seq, "NODE_ALLOC ");
+
+ seq_puts(seq, "\n");
+
+ /* not really stopped, more like last-running-at */
+ stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
+ idle = pkt_dev->idle_acc;
+ do_div(idle, NSEC_PER_USEC);
+
+ seq_printf(seq,
+ "Current:\n pkts-sofar: %llu errors: %llu\n",
+ (unsigned long long)pkt_dev->sofar,
+ (unsigned long long)pkt_dev->errors);
+
+ seq_printf(seq,
+ " started: %lluus stopped: %lluus idle: %lluus\n",
+ (unsigned long long) ktime_to_us(pkt_dev->started_at),
+ (unsigned long long) ktime_to_us(stopped),
+ (unsigned long long) idle);
+
+ seq_printf(seq,
+ " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
+ pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
+ pkt_dev->cur_src_mac_offset);
+
+ if (pkt_dev->flags & F_IPV6) {
+ seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
+ &pkt_dev->cur_in6_saddr,
+ &pkt_dev->cur_in6_daddr);
+ } else
+ seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
+ &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
+
+ seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
+ pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
+
+ seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
+
+ seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
+
+ if (pkt_dev->result[0])
+ seq_printf(seq, "Result: %s\n", pkt_dev->result);
+ else
+ seq_puts(seq, "Result: Idle\n");
+
+ return 0;
+}
+
+
+static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
+ __u32 *num)
+{
+ int i = 0;
+ *num = 0;
+
+ for (; i < maxlen; i++) {
+ int value;
+ char c;
+ *num <<= 4;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ value = hex_to_bin(c);
+ if (value >= 0)
+ *num |= value;
+ else
+ break;
+ }
+ return i;
+}
+
+static int count_trail_chars(const char __user * user_buffer,
+ unsigned int maxlen)
+{
+ int i;
+
+ for (i = 0; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ switch (c) {
+ case '\"':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ case '=':
+ break;
+ default:
+ goto done;
+ }
+ }
+done:
+ return i;
+}
+
+static long num_arg(const char __user *user_buffer, unsigned long maxlen,
+ unsigned long *num)
+{
+ int i;
+ *num = 0;
+
+ for (i = 0; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ if ((c >= '0') && (c <= '9')) {
+ *num *= 10;
+ *num += c - '0';
+ } else
+ break;
+ }
+ return i;
+}
+
+static int strn_len(const char __user * user_buffer, unsigned int maxlen)
+{
+ int i;
+
+ for (i = 0; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ switch (c) {
+ case '\"':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ goto done_str;
+ default:
+ break;
+ }
+ }
+done_str:
+ return i;
+}
+
+static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
+{
+ unsigned int n = 0;
+ char c;
+ ssize_t i = 0;
+ int len;
+
+ pkt_dev->nr_labels = 0;
+ do {
+ __u32 tmp;
+ len = hex32_arg(&buffer[i], 8, &tmp);
+ if (len <= 0)
+ return len;
+ pkt_dev->labels[n] = htonl(tmp);
+ if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
+ pkt_dev->flags |= F_MPLS_RND;
+ i += len;
+ if (get_user(c, &buffer[i]))
+ return -EFAULT;
+ i++;
+ n++;
+ if (n >= MAX_MPLS_LABELS)
+ return -E2BIG;
+ } while (c == ',');
+
+ pkt_dev->nr_labels = n;
+ return i;
+}
+
+static ssize_t pktgen_if_write(struct file *file,
+ const char __user * user_buffer, size_t count,
+ loff_t * offset)
+{
+ struct seq_file *seq = file->private_data;
+ struct pktgen_dev *pkt_dev = seq->private;
+ int i, max, len;
+ char name[16], valstr[32];
+ unsigned long value = 0;
+ char *pg_result = NULL;
+ int tmp = 0;
+ char buf[128];
+
+ pg_result = &(pkt_dev->result[0]);
+
+ if (count < 1) {
+ pr_warn("wrong command format\n");
+ return -EINVAL;
+ }
+
+ max = count;
+ tmp = count_trail_chars(user_buffer, max);
+ if (tmp < 0) {
+ pr_warn("illegal format\n");
+ return tmp;
+ }
+ i = tmp;
+
+ /* Read variable name */
+
+ len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ if (len < 0)
+ return len;
+
+ memset(name, 0, sizeof(name));
+ if (copy_from_user(name, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ max = count - i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (debug) {
+ size_t copy = min_t(size_t, count, 1023);
+ char tb[copy + 1];
+ if (copy_from_user(tb, user_buffer, copy))
+ return -EFAULT;
+ tb[copy] = 0;
+ pr_debug("%s,%lu buffer -:%s:-\n",
+ name, (unsigned long)count, tb);
+ }
+
+ if (!strcmp(name, "min_pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value < 14 + 20 + 8)
+ value = 14 + 20 + 8;
+ if (value != pkt_dev->min_pkt_size) {
+ pkt_dev->min_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: min_pkt_size=%u",
+ pkt_dev->min_pkt_size);
+ return count;
+ }
+
+ if (!strcmp(name, "max_pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value < 14 + 20 + 8)
+ value = 14 + 20 + 8;
+ if (value != pkt_dev->max_pkt_size) {
+ pkt_dev->max_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: max_pkt_size=%u",
+ pkt_dev->max_pkt_size);
+ return count;
+ }
+
+ /* Shortcut for min = max */
+
+ if (!strcmp(name, "pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value < 14 + 20 + 8)
+ value = 14 + 20 + 8;
+ if (value != pkt_dev->min_pkt_size) {
+ pkt_dev->min_pkt_size = value;
+ pkt_dev->max_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
+ return count;
+ }
+
+ if (!strcmp(name, "debug")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ debug = value;
+ sprintf(pg_result, "OK: debug=%u", debug);
+ return count;
+ }
+
+ if (!strcmp(name, "frags")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->nfrags = value;
+ sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
+ return count;
+ }
+ if (!strcmp(name, "delay")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value == 0x7FFFFFFF)
+ pkt_dev->delay = ULLONG_MAX;
+ else
+ pkt_dev->delay = (u64)value;
+
+ sprintf(pg_result, "OK: delay=%llu",
+ (unsigned long long) pkt_dev->delay);
+ return count;
+ }
+ if (!strcmp(name, "rate")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (!value)
+ return len;
+ pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
+ if (debug)
+ pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
+
+ sprintf(pg_result, "OK: rate=%lu", value);
+ return count;
+ }
+ if (!strcmp(name, "ratep")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (!value)
+ return len;
+ pkt_dev->delay = NSEC_PER_SEC/value;
+ if (debug)
+ pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
+
+ sprintf(pg_result, "OK: rate=%lu", value);
+ return count;
+ }
+ if (!strcmp(name, "udp_src_min")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value != pkt_dev->udp_src_min) {
+ pkt_dev->udp_src_min = value;
+ pkt_dev->cur_udp_src = value;
+ }
+ sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
+ return count;
+ }
+ if (!strcmp(name, "udp_dst_min")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value != pkt_dev->udp_dst_min) {
+ pkt_dev->udp_dst_min = value;
+ pkt_dev->cur_udp_dst = value;
+ }
+ sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
+ return count;
+ }
+ if (!strcmp(name, "udp_src_max")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value != pkt_dev->udp_src_max) {
+ pkt_dev->udp_src_max = value;
+ pkt_dev->cur_udp_src = value;
+ }
+ sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
+ return count;
+ }
+ if (!strcmp(name, "udp_dst_max")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value != pkt_dev->udp_dst_max) {
+ pkt_dev->udp_dst_max = value;
+ pkt_dev->cur_udp_dst = value;
+ }
+ sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
+ return count;
+ }
+ if (!strcmp(name, "clone_skb")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+ if ((value > 0) &&
+ (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
+ return -ENOTSUPP;
+ i += len;
+ pkt_dev->clone_skb = value;
+
+ sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
+ return count;
+ }
+ if (!strcmp(name, "count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->count = value;
+ sprintf(pg_result, "OK: count=%llu",
+ (unsigned long long)pkt_dev->count);
+ return count;
+ }
+ if (!strcmp(name, "src_mac_count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (pkt_dev->src_mac_count != value) {
+ pkt_dev->src_mac_count = value;
+ pkt_dev->cur_src_mac_offset = 0;
+ }
+ sprintf(pg_result, "OK: src_mac_count=%d",
+ pkt_dev->src_mac_count);
+ return count;
+ }
+ if (!strcmp(name, "dst_mac_count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (pkt_dev->dst_mac_count != value) {
+ pkt_dev->dst_mac_count = value;
+ pkt_dev->cur_dst_mac_offset = 0;
+ }
+ sprintf(pg_result, "OK: dst_mac_count=%d",
+ pkt_dev->dst_mac_count);
+ return count;
+ }
+ if (!strcmp(name, "burst")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if ((value > 1) &&
+ (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
+ return -ENOTSUPP;
+ pkt_dev->burst = value < 1 ? 1 : value;
+ sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
+ return count;
+ }
+ if (!strcmp(name, "node")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (node_possible(value)) {
+ pkt_dev->node = value;
+ sprintf(pg_result, "OK: node=%d", pkt_dev->node);
+ if (pkt_dev->page) {
+ put_page(pkt_dev->page);
+ pkt_dev->page = NULL;
+ }
+ }
+ else
+ sprintf(pg_result, "ERROR: node not possible");
+ return count;
+ }
+ if (!strcmp(name, "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 if (strcmp(f, "MPLS_RND") == 0)
+ pkt_dev->flags |= F_MPLS_RND;
+
+ else if (strcmp(f, "!MPLS_RND") == 0)
+ pkt_dev->flags &= ~F_MPLS_RND;
+
+ else if (strcmp(f, "VID_RND") == 0)
+ pkt_dev->flags |= F_VID_RND;
+
+ else if (strcmp(f, "!VID_RND") == 0)
+ pkt_dev->flags &= ~F_VID_RND;
+
+ else if (strcmp(f, "SVID_RND") == 0)
+ pkt_dev->flags |= F_SVID_RND;
+
+ else if (strcmp(f, "!SVID_RND") == 0)
+ pkt_dev->flags &= ~F_SVID_RND;
+
+ else if (strcmp(f, "FLOW_SEQ") == 0)
+ pkt_dev->flags |= F_FLOW_SEQ;
+
+ else if (strcmp(f, "QUEUE_MAP_RND") == 0)
+ pkt_dev->flags |= F_QUEUE_MAP_RND;
+
+ else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
+ pkt_dev->flags &= ~F_QUEUE_MAP_RND;
+
+ else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
+ pkt_dev->flags |= F_QUEUE_MAP_CPU;
+
+ else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
+ pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
+#ifdef CONFIG_XFRM
+ else if (strcmp(f, "IPSEC") == 0)
+ pkt_dev->flags |= F_IPSEC_ON;
+#endif
+
+ else if (strcmp(f, "!IPV6") == 0)
+ pkt_dev->flags &= ~F_IPV6;
+
+ else if (strcmp(f, "NODE_ALLOC") == 0)
+ pkt_dev->flags |= F_NODE;
+
+ else if (strcmp(f, "!NODE_ALLOC") == 0)
+ pkt_dev->flags &= ~F_NODE;
+
+ else if (strcmp(f, "UDPCSUM") == 0)
+ pkt_dev->flags |= F_UDPCSUM;
+
+ else if (strcmp(f, "!UDPCSUM") == 0)
+ pkt_dev->flags &= ~F_UDPCSUM;
+
+ else if (strcmp(f, "NO_TIMESTAMP") == 0)
+ pkt_dev->flags |= F_NO_TIMESTAMP;
+
+ else {
+ sprintf(pg_result,
+ "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
+ f,
+ "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
+ "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
+ "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
+ "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
+ "NO_TIMESTAMP, "
+#ifdef CONFIG_XFRM
+ "IPSEC, "
+#endif
+ "NODE_ALLOC\n");
+ return count;
+ }
+ sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
+ return count;
+ }
+ if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
+ if (len < 0)
+ return len;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->dst_min) != 0) {
+ memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
+ 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)
+ pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
+ i += len;
+ sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
+ return count;
+ }
+ if (!strcmp(name, "dst_max")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
+ if (len < 0)
+ return len;
+
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->dst_max) != 0) {
+ memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
+ 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)
+ pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
+ i += len;
+ sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
+ return count;
+ }
+ if (!strcmp(name, "dst6")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0)
+ return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
+ snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
+
+ pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
+
+ if (debug)
+ pr_debug("dst6 set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "dst6_min")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0)
+ return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
+ snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
+
+ pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
+ if (debug)
+ pr_debug("dst6_min set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6_min=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "dst6_max")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0)
+ return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
+ snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
+
+ if (debug)
+ pr_debug("dst6_max set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6_max=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "src6")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0)
+ return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
+ snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
+
+ pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
+
+ if (debug)
+ pr_debug("src6 set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: src6=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "src_min")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
+ if (len < 0)
+ return len;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->src_min) != 0) {
+ memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
+ 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)
+ pr_debug("src_min set to: %s\n", pkt_dev->src_min);
+ i += len;
+ sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
+ return count;
+ }
+ if (!strcmp(name, "src_max")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
+ if (len < 0)
+ return len;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->src_max) != 0) {
+ memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
+ 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)
+ pr_debug("src_max set to: %s\n", pkt_dev->src_max);
+ i += len;
+ sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
+ return count;
+ }
+ if (!strcmp(name, "dst_mac")) {
+ len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ if (len < 0)
+ return len;
+
+ memset(valstr, 0, sizeof(valstr));
+ if (copy_from_user(valstr, &user_buffer[i], len))
+ return -EFAULT;
+
+ if (!mac_pton(valstr, pkt_dev->dst_mac))
+ return -EINVAL;
+ /* Set up Dest MAC */
+ ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
+
+ sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
+ return count;
+ }
+ if (!strcmp(name, "src_mac")) {
+ len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ if (len < 0)
+ return len;
+
+ memset(valstr, 0, sizeof(valstr));
+ if (copy_from_user(valstr, &user_buffer[i], len))
+ return -EFAULT;
+
+ if (!mac_pton(valstr, pkt_dev->src_mac))
+ return -EINVAL;
+ /* Set up Src MAC */
+ ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
+
+ sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
+ return count;
+ }
+
+ if (!strcmp(name, "clear_counters")) {
+ pktgen_clear_counters(pkt_dev);
+ sprintf(pg_result, "OK: Clearing counters.\n");
+ return count;
+ }
+
+ if (!strcmp(name, "flows")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value > MAX_CFLOWS)
+ value = MAX_CFLOWS;
+
+ pkt_dev->cflows = value;
+ sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
+ return count;
+ }
+#ifdef CONFIG_XFRM
+ if (!strcmp(name, "spi")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->spi = value;
+ sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
+ return count;
+ }
+#endif
+ if (!strcmp(name, "flowlen")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->lflow = value;
+ sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
+ return count;
+ }
+
+ if (!strcmp(name, "queue_map_min")) {
+ len = num_arg(&user_buffer[i], 5, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->queue_map_min = value;
+ sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
+ return count;
+ }
+
+ if (!strcmp(name, "queue_map_max")) {
+ len = num_arg(&user_buffer[i], 5, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->queue_map_max = value;
+ sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
+ return count;
+ }
+
+ if (!strcmp(name, "mpls")) {
+ unsigned int n, cnt;
+
+ len = get_labels(&user_buffer[i], pkt_dev);
+ if (len < 0)
+ return len;
+ i += len;
+ cnt = sprintf(pg_result, "OK: mpls=");
+ for (n = 0; n < pkt_dev->nr_labels; n++)
+ cnt += sprintf(pg_result + cnt,
+ "%08x%s", ntohl(pkt_dev->labels[n]),
+ n == pkt_dev->nr_labels-1 ? "" : ",");
+
+ if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
+ pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
+ pkt_dev->svlan_id = 0xffff;
+
+ if (debug)
+ pr_debug("VLAN/SVLAN auto turned off\n");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "vlan_id")) {
+ len = num_arg(&user_buffer[i], 4, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (value <= 4095) {
+ pkt_dev->vlan_id = value; /* turn on VLAN */
+
+ if (debug)
+ pr_debug("VLAN turned on\n");
+
+ if (debug && pkt_dev->nr_labels)
+ pr_debug("MPLS auto turned off\n");
+
+ pkt_dev->nr_labels = 0; /* turn off MPLS */
+ sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
+ } else {
+ pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
+ pkt_dev->svlan_id = 0xffff;
+
+ if (debug)
+ pr_debug("VLAN/SVLAN turned off\n");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "vlan_p")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
+ pkt_dev->vlan_p = value;
+ sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
+ } else {
+ sprintf(pg_result, "ERROR: vlan_p must be 0-7");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "vlan_cfi")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
+ pkt_dev->vlan_cfi = value;
+ sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
+ } else {
+ sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "svlan_id")) {
+ len = num_arg(&user_buffer[i], 4, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
+ pkt_dev->svlan_id = value; /* turn on SVLAN */
+
+ if (debug)
+ pr_debug("SVLAN turned on\n");
+
+ if (debug && pkt_dev->nr_labels)
+ pr_debug("MPLS auto turned off\n");
+
+ pkt_dev->nr_labels = 0; /* turn off MPLS */
+ sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
+ } else {
+ pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
+ pkt_dev->svlan_id = 0xffff;
+
+ if (debug)
+ pr_debug("VLAN/SVLAN turned off\n");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "svlan_p")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
+ pkt_dev->svlan_p = value;
+ sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
+ } else {
+ sprintf(pg_result, "ERROR: svlan_p must be 0-7");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "svlan_cfi")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
+ pkt_dev->svlan_cfi = value;
+ sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
+ } else {
+ sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "tos")) {
+ __u32 tmp_value = 0;
+ len = hex32_arg(&user_buffer[i], 2, &tmp_value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (len == 2) {
+ pkt_dev->tos = tmp_value;
+ sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
+ } else {
+ sprintf(pg_result, "ERROR: tos must be 00-ff");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "traffic_class")) {
+ __u32 tmp_value = 0;
+ len = hex32_arg(&user_buffer[i], 2, &tmp_value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ if (len == 2) {
+ pkt_dev->traffic_class = tmp_value;
+ sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
+ } else {
+ sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "skb_priority")) {
+ len = num_arg(&user_buffer[i], 9, &value);
+ if (len < 0)
+ return len;
+
+ i += len;
+ pkt_dev->skb_priority = value;
+ sprintf(pg_result, "OK: skb_priority=%i",
+ pkt_dev->skb_priority);
+ return count;
+ }
+
+ sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
+ return -EINVAL;
+}
+
+static int pktgen_if_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pktgen_if_show, PDE_DATA(inode));
+}
+
+static const struct file_operations pktgen_if_fops = {
+ .owner = THIS_MODULE,
+ .open = pktgen_if_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = pktgen_if_write,
+ .release = single_release,
+};
+
+static int pktgen_thread_show(struct seq_file *seq, void *v)
+{
+ struct pktgen_thread *t = seq->private;
+ const struct pktgen_dev *pkt_dev;
+
+ BUG_ON(!t);
+
+ seq_puts(seq, "Running: ");
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
+ if (pkt_dev->running)
+ seq_printf(seq, "%s ", pkt_dev->odevname);
+
+ seq_puts(seq, "\nStopped: ");
+
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
+ if (!pkt_dev->running)
+ seq_printf(seq, "%s ", pkt_dev->odevname);
+
+ if (t->result[0])
+ seq_printf(seq, "\nResult: %s\n", t->result);
+ else
+ seq_puts(seq, "\nResult: NA\n");
+
+ rcu_read_unlock();
+
+ return 0;
+}
+
+static ssize_t pktgen_thread_write(struct file *file,
+ const char __user * user_buffer,
+ size_t count, loff_t * offset)
+{
+ struct seq_file *seq = file->private_data;
+ struct pktgen_thread *t = seq->private;
+ int i, max, len, ret;
+ char name[40];
+ char *pg_result;
+
+ if (count < 1) {
+ // sprintf(pg_result, "Wrong command format");
+ return -EINVAL;
+ }
+
+ max = count;
+ len = count_trail_chars(user_buffer, max);
+ if (len < 0)
+ return len;
+
+ i = len;
+
+ /* Read variable name */
+
+ len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ if (len < 0)
+ return len;
+
+ memset(name, 0, sizeof(name));
+ if (copy_from_user(name, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ max = count - i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (debug)
+ pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
+
+ if (!t) {
+ pr_err("ERROR: No thread\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pg_result = &(t->result[0]);
+
+ if (!strcmp(name, "add_device")) {
+ char f[32];
+ memset(f, 0, 32);
+ len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ if (len < 0) {
+ ret = len;
+ goto out;
+ }
+ if (copy_from_user(f, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+ mutex_lock(&pktgen_thread_lock);
+ ret = pktgen_add_device(t, f);
+ mutex_unlock(&pktgen_thread_lock);
+ if (!ret) {
+ ret = count;
+ sprintf(pg_result, "OK: add_device=%s", f);
+ } else
+ sprintf(pg_result, "ERROR: can not add device %s", f);
+ goto out;
+ }
+
+ if (!strcmp(name, "rem_device_all")) {
+ mutex_lock(&pktgen_thread_lock);
+ t->control |= T_REMDEVALL;
+ mutex_unlock(&pktgen_thread_lock);
+ schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
+ ret = count;
+ sprintf(pg_result, "OK: rem_device_all");
+ goto out;
+ }
+
+ if (!strcmp(name, "max_before_softirq")) {
+ sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
+ ret = count;
+ goto out;
+ }
+
+ ret = -EINVAL;
+out:
+ return ret;
+}
+
+static int pktgen_thread_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pktgen_thread_show, PDE_DATA(inode));
+}
+
+static const struct file_operations pktgen_thread_fops = {
+ .owner = THIS_MODULE,
+ .open = pktgen_thread_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = pktgen_thread_write,
+ .release = single_release,
+};
+
+/* Think find or remove for NN */
+static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
+ const char *ifname, int remove)
+{
+ struct pktgen_thread *t;
+ struct pktgen_dev *pkt_dev = NULL;
+ bool exact = (remove == FIND);
+
+ list_for_each_entry(t, &pn->pktgen_threads, th_list) {
+ pkt_dev = pktgen_find_dev(t, ifname, exact);
+ if (pkt_dev) {
+ if (remove) {
+ pkt_dev->removal_mark = 1;
+ t->control |= T_REMDEV;
+ }
+ break;
+ }
+ }
+ return pkt_dev;
+}
+
+/*
+ * mark a device for removal
+ */
+static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
+{
+ struct pktgen_dev *pkt_dev = NULL;
+ const int max_tries = 10, msec_per_try = 125;
+ int i = 0;
+
+ mutex_lock(&pktgen_thread_lock);
+ pr_debug("%s: marking %s for removal\n", __func__, ifname);
+
+ while (1) {
+
+ pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
+ if (pkt_dev == NULL)
+ break; /* success */
+
+ mutex_unlock(&pktgen_thread_lock);
+ pr_debug("%s: waiting for %s to disappear....\n",
+ __func__, ifname);
+ schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
+ mutex_lock(&pktgen_thread_lock);
+
+ if (++i >= max_tries) {
+ pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
+ __func__, msec_per_try * i, ifname);
+ break;
+ }
+
+ }
+
+ mutex_unlock(&pktgen_thread_lock);
+}
+
+static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
+{
+ struct pktgen_thread *t;
+
+ list_for_each_entry(t, &pn->pktgen_threads, th_list) {
+ struct pktgen_dev *pkt_dev;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
+ if (pkt_dev->odev != dev)
+ continue;
+
+ proc_remove(pkt_dev->entry);
+
+ pkt_dev->entry = proc_create_data(dev->name, 0600,
+ pn->proc_dir,
+ &pktgen_if_fops,
+ pkt_dev);
+ if (!pkt_dev->entry)
+ pr_err("can't move proc entry for '%s'\n",
+ dev->name);
+ break;
+ }
+ rcu_read_unlock();
+ }
+}
+
+static int pktgen_device_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
+
+ if (pn->pktgen_exiting)
+ return NOTIFY_DONE;
+
+ /* It is OK that we do not hold the group lock right now,
+ * as we run under the RTNL lock.
+ */
+
+ switch (event) {
+ case NETDEV_CHANGENAME:
+ pktgen_change_name(pn, dev);
+ break;
+
+ case NETDEV_UNREGISTER:
+ pktgen_mark_device(pn, dev->name);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
+ struct pktgen_dev *pkt_dev,
+ const char *ifname)
+{
+ char b[IFNAMSIZ+5];
+ int i;
+
+ for (i = 0; ifname[i] != '@'; i++) {
+ if (i == IFNAMSIZ)
+ break;
+
+ b[i] = ifname[i];
+ }
+ b[i] = 0;
+
+ return dev_get_by_name(pn->net, b);
+}
+
+
+/* Associate pktgen_dev with a device. */
+
+static int pktgen_setup_dev(const struct pktgen_net *pn,
+ struct pktgen_dev *pkt_dev, const char *ifname)
+{
+ struct net_device *odev;
+ int err;
+
+ /* Clean old setups */
+ if (pkt_dev->odev) {
+ dev_put(pkt_dev->odev);
+ pkt_dev->odev = NULL;
+ }
+
+ odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
+ if (!odev) {
+ pr_err("no such netdevice: \"%s\"\n", ifname);
+ return -ENODEV;
+ }
+
+ if (odev->type != ARPHRD_ETHER) {
+ pr_err("not an ethernet device: \"%s\"\n", ifname);
+ err = -EINVAL;
+ } else if (!netif_running(odev)) {
+ pr_err("device is down: \"%s\"\n", ifname);
+ err = -ENETDOWN;
+ } else {
+ pkt_dev->odev = odev;
+ return 0;
+ }
+
+ dev_put(odev);
+ return err;
+}
+
+/* Read pkt_dev from the interface and set up internal pktgen_dev
+ * structure to have the right information to create/send packets
+ */
+static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
+{
+ int ntxq;
+
+ if (!pkt_dev->odev) {
+ pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
+ sprintf(pkt_dev->result,
+ "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
+ return;
+ }
+
+ /* make sure that we don't pick a non-existing transmit queue */
+ ntxq = pkt_dev->odev->real_num_tx_queues;
+
+ if (ntxq <= pkt_dev->queue_map_min) {
+ pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
+ pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
+ pkt_dev->odevname);
+ pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
+ }
+ if (pkt_dev->queue_map_max >= ntxq) {
+ pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
+ pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
+ pkt_dev->odevname);
+ pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
+ }
+
+ /* Default to the interface's mac if not explicitly set. */
+
+ if (is_zero_ether_addr(pkt_dev->src_mac))
+ ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
+
+ /* Set up Dest MAC */
+ ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
+
+ if (pkt_dev->flags & F_IPV6) {
+ int i, set = 0, err = 1;
+ struct inet6_dev *idev;
+
+ if (pkt_dev->min_pkt_size == 0) {
+ pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
+ + sizeof(struct udphdr)
+ + sizeof(struct pktgen_hdr)
+ + pkt_dev->pkt_overhead;
+ }
+
+ for (i = 0; i < 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
+ */
+
+ rcu_read_lock();
+ idev = __in6_dev_get(pkt_dev->odev);
+ if (idev) {
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ list_for_each_entry(ifp, &idev->addr_list, if_list) {
+ if ((ifp->scope & IFA_LINK) &&
+ !(ifp->flags & IFA_F_TENTATIVE)) {
+ pkt_dev->cur_in6_saddr = ifp->addr;
+ err = 0;
+ break;
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ rcu_read_unlock();
+ if (err)
+ pr_err("ERROR: IPv6 link address not available\n");
+ }
+ } else {
+ if (pkt_dev->min_pkt_size == 0) {
+ pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
+ + sizeof(struct udphdr)
+ + sizeof(struct pktgen_hdr)
+ + pkt_dev->pkt_overhead;
+ }
+
+ pkt_dev->saddr_min = 0;
+ pkt_dev->saddr_max = 0;
+ if (strlen(pkt_dev->src_min) == 0) {
+
+ struct in_device *in_dev;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(pkt_dev->odev);
+ if (in_dev) {
+ if (in_dev->ifa_list) {
+ pkt_dev->saddr_min =
+ in_dev->ifa_list->ifa_address;
+ pkt_dev->saddr_max = pkt_dev->saddr_min;
+ }
+ }
+ rcu_read_unlock();
+ } else {
+ pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
+ pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
+ }
+
+ pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
+ pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
+ }
+ /* Initialize current values. */
+ pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
+ if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
+ pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
+
+ pkt_dev->cur_dst_mac_offset = 0;
+ pkt_dev->cur_src_mac_offset = 0;
+ pkt_dev->cur_saddr = pkt_dev->saddr_min;
+ pkt_dev->cur_daddr = pkt_dev->daddr_min;
+ pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
+ pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
+ pkt_dev->nflows = 0;
+}
+
+
+static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
+{
+ ktime_t start_time, end_time;
+ s64 remaining;
+ struct hrtimer_sleeper t;
+
+ hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_set_expires(&t.timer, spin_until);
+
+ remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
+ if (remaining <= 0) {
+ pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
+ return;
+ }
+
+ start_time = ktime_get();
+ if (remaining < 100000) {
+ /* for small delays (<100us), just loop until limit is reached */
+ do {
+ end_time = ktime_get();
+ } while (ktime_compare(end_time, spin_until) < 0);
+ } else {
+ /* see do_nanosleep */
+ hrtimer_init_sleeper(&t, current);
+ do {
+ set_current_state(TASK_INTERRUPTIBLE);
+ hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
+ if (!hrtimer_active(&t.timer))
+ t.task = NULL;
+
+ if (likely(t.task))
+ schedule();
+
+ hrtimer_cancel(&t.timer);
+ } while (t.task && pkt_dev->running && !signal_pending(current));
+ __set_current_state(TASK_RUNNING);
+ end_time = ktime_get();
+ }
+
+ pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
+ pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
+}
+
+static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
+{
+ pkt_dev->pkt_overhead = 0;
+ pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
+ pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
+ pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
+}
+
+static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
+{
+ return !!(pkt_dev->flows[flow].flags & F_INIT);
+}
+
+static inline int f_pick(struct pktgen_dev *pkt_dev)
+{
+ int flow = pkt_dev->curfl;
+
+ if (pkt_dev->flags & F_FLOW_SEQ) {
+ if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
+ /* reset time */
+ pkt_dev->flows[flow].count = 0;
+ pkt_dev->flows[flow].flags = 0;
+ pkt_dev->curfl += 1;
+ if (pkt_dev->curfl >= pkt_dev->cflows)
+ pkt_dev->curfl = 0; /*reset */
+ }
+ } else {
+ flow = prandom_u32() % pkt_dev->cflows;
+ pkt_dev->curfl = flow;
+
+ if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
+ pkt_dev->flows[flow].count = 0;
+ pkt_dev->flows[flow].flags = 0;
+ }
+ }
+
+ return pkt_dev->curfl;
+}
+
+
+#ifdef CONFIG_XFRM
+/* If there was already an IPSEC SA, we keep it as is, else
+ * we go look for it ...
+*/
+#define DUMMY_MARK 0
+static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
+{
+ struct xfrm_state *x = pkt_dev->flows[flow].x;
+ struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
+ if (!x) {
+
+ if (pkt_dev->spi) {
+ /* We need as quick as possible to find the right SA
+ * Searching with minimum criteria to archieve this.
+ */
+ x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
+ } else {
+ /* slow path: we dont already have xfrm_state */
+ x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
+ (xfrm_address_t *)&pkt_dev->cur_daddr,
+ (xfrm_address_t *)&pkt_dev->cur_saddr,
+ AF_INET,
+ pkt_dev->ipsmode,
+ pkt_dev->ipsproto, 0);
+ }
+ if (x) {
+ pkt_dev->flows[flow].x = x;
+ set_pkt_overhead(pkt_dev);
+ pkt_dev->pkt_overhead += x->props.header_len;
+ }
+
+ }
+}
+#endif
+static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
+{
+
+ if (pkt_dev->flags & F_QUEUE_MAP_CPU)
+ pkt_dev->cur_queue_map = smp_processor_id();
+
+ else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
+ __u16 t;
+ if (pkt_dev->flags & F_QUEUE_MAP_RND) {
+ t = prandom_u32() %
+ (pkt_dev->queue_map_max -
+ pkt_dev->queue_map_min + 1)
+ + pkt_dev->queue_map_min;
+ } else {
+ t = pkt_dev->cur_queue_map + 1;
+ if (t > pkt_dev->queue_map_max)
+ t = pkt_dev->queue_map_min;
+ }
+ pkt_dev->cur_queue_map = t;
+ }
+ pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
+}
+
+/* Increment/randomize headers according to flags and current values
+ * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
+ */
+static void mod_cur_headers(struct pktgen_dev *pkt_dev)
+{
+ __u32 imn;
+ __u32 imx;
+ int flow = 0;
+
+ if (pkt_dev->cflows)
+ flow = f_pick(pkt_dev);
+
+ /* Deal with source MAC */
+ if (pkt_dev->src_mac_count > 1) {
+ __u32 mc;
+ __u32 tmp;
+
+ if (pkt_dev->flags & F_MACSRC_RND)
+ mc = prandom_u32() % pkt_dev->src_mac_count;
+ else {
+ mc = pkt_dev->cur_src_mac_offset++;
+ if (pkt_dev->cur_src_mac_offset >=
+ pkt_dev->src_mac_count)
+ pkt_dev->cur_src_mac_offset = 0;
+ }
+
+ tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
+ pkt_dev->hh[11] = tmp;
+ tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[10] = tmp;
+ tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[9] = tmp;
+ tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[8] = tmp;
+ tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
+ pkt_dev->hh[7] = tmp;
+ }
+
+ /* Deal with Destination MAC */
+ if (pkt_dev->dst_mac_count > 1) {
+ __u32 mc;
+ __u32 tmp;
+
+ if (pkt_dev->flags & F_MACDST_RND)
+ mc = prandom_u32() % pkt_dev->dst_mac_count;
+
+ else {
+ mc = pkt_dev->cur_dst_mac_offset++;
+ if (pkt_dev->cur_dst_mac_offset >=
+ pkt_dev->dst_mac_count) {
+ pkt_dev->cur_dst_mac_offset = 0;
+ }
+ }
+
+ tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
+ pkt_dev->hh[5] = tmp;
+ tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[4] = tmp;
+ tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[3] = tmp;
+ tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[2] = tmp;
+ tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
+ pkt_dev->hh[1] = tmp;
+ }
+
+ if (pkt_dev->flags & F_MPLS_RND) {
+ unsigned int i;
+ for (i = 0; i < pkt_dev->nr_labels; i++)
+ if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
+ pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
+ ((__force __be32)prandom_u32() &
+ htonl(0x000fffff));
+ }
+
+ if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
+ pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
+ }
+
+ if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
+ pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
+ }
+
+ if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
+ if (pkt_dev->flags & F_UDPSRC_RND)
+ pkt_dev->cur_udp_src = prandom_u32() %
+ (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
+ + pkt_dev->udp_src_min;
+
+ else {
+ pkt_dev->cur_udp_src++;
+ if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
+ pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
+ }
+ }
+
+ if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
+ if (pkt_dev->flags & F_UDPDST_RND) {
+ pkt_dev->cur_udp_dst = prandom_u32() %
+ (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
+ + pkt_dev->udp_dst_min;
+ } else {
+ pkt_dev->cur_udp_dst++;
+ if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
+ pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
+ }
+ }
+
+ if (!(pkt_dev->flags & F_IPV6)) {
+
+ imn = ntohl(pkt_dev->saddr_min);
+ imx = ntohl(pkt_dev->saddr_max);
+ if (imn < imx) {
+ __u32 t;
+ if (pkt_dev->flags & F_IPSRC_RND)
+ t = prandom_u32() % (imx - imn) + imn;
+ else {
+ t = ntohl(pkt_dev->cur_saddr);
+ t++;
+ if (t > imx)
+ t = imn;
+
+ }
+ pkt_dev->cur_saddr = htonl(t);
+ }
+
+ if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
+ pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
+ } else {
+ imn = ntohl(pkt_dev->daddr_min);
+ imx = ntohl(pkt_dev->daddr_max);
+ if (imn < imx) {
+ __u32 t;
+ __be32 s;
+ if (pkt_dev->flags & F_IPDST_RND) {
+
+ do {
+ t = prandom_u32() %
+ (imx - imn) + imn;
+ s = htonl(t);
+ } while (ipv4_is_loopback(s) ||
+ ipv4_is_multicast(s) ||
+ ipv4_is_lbcast(s) ||
+ ipv4_is_zeronet(s) ||
+ ipv4_is_local_multicast(s));
+ pkt_dev->cur_daddr = s;
+ } else {
+ t = ntohl(pkt_dev->cur_daddr);
+ t++;
+ if (t > imx) {
+ t = imn;
+ }
+ pkt_dev->cur_daddr = htonl(t);
+ }
+ }
+ if (pkt_dev->cflows) {
+ pkt_dev->flows[flow].flags |= F_INIT;
+ pkt_dev->flows[flow].cur_daddr =
+ pkt_dev->cur_daddr;
+#ifdef CONFIG_XFRM
+ if (pkt_dev->flags & F_IPSEC_ON)
+ get_ipsec_sa(pkt_dev, flow);
+#endif
+ pkt_dev->nflows++;
+ }
+ }
+ } else { /* IPV6 * */
+
+ if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
+ int i;
+
+ /* Only random destinations yet */
+
+ for (i = 0; i < 4; i++) {
+ pkt_dev->cur_in6_daddr.s6_addr32[i] =
+ (((__force __be32)prandom_u32() |
+ pkt_dev->min_in6_daddr.s6_addr32[i]) &
+ pkt_dev->max_in6_daddr.s6_addr32[i]);
+ }
+ }
+ }
+
+ if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
+ __u32 t;
+ if (pkt_dev->flags & F_TXSIZE_RND) {
+ t = prandom_u32() %
+ (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
+ + pkt_dev->min_pkt_size;
+ } else {
+ t = pkt_dev->cur_pkt_size + 1;
+ if (t > pkt_dev->max_pkt_size)
+ t = pkt_dev->min_pkt_size;
+ }
+ pkt_dev->cur_pkt_size = t;
+ }
+
+ set_cur_queue_map(pkt_dev);
+
+ pkt_dev->flows[flow].count++;
+}
+
+
+#ifdef CONFIG_XFRM
+static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
+
+ [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
+};
+
+static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
+{
+ struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
+ int err = 0;
+ struct net *net = dev_net(pkt_dev->odev);
+
+ if (!x)
+ return 0;
+ /* XXX: we dont support tunnel mode for now until
+ * we resolve the dst issue */
+ if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
+ return 0;
+
+ /* But when user specify an valid SPI, transformation
+ * supports both transport/tunnel mode + ESP/AH type.
+ */
+ if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
+ skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
+
+ rcu_read_lock_bh();
+ err = x->outer_mode->output(x, skb);
+ rcu_read_unlock_bh();
+ if (err) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
+ goto error;
+ }
+ err = x->type->output(x, skb);
+ if (err) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
+ goto error;
+ }
+ spin_lock_bh(&x->lock);
+ x->curlft.bytes += skb->len;
+ x->curlft.packets++;
+ spin_unlock_bh(&x->lock);
+error:
+ return err;
+}
+
+static void free_SAs(struct pktgen_dev *pkt_dev)
+{
+ if (pkt_dev->cflows) {
+ /* let go of the SAs if we have them */
+ int i;
+ for (i = 0; i < pkt_dev->cflows; i++) {
+ struct xfrm_state *x = pkt_dev->flows[i].x;
+ if (x) {
+ xfrm_state_put(x);
+ pkt_dev->flows[i].x = NULL;
+ }
+ }
+ }
+}
+
+static int process_ipsec(struct pktgen_dev *pkt_dev,
+ struct sk_buff *skb, __be16 protocol)
+{
+ if (pkt_dev->flags & F_IPSEC_ON) {
+ struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
+ int nhead = 0;
+ if (x) {
+ int ret;
+ __u8 *eth;
+ struct iphdr *iph;
+
+ nhead = x->props.header_len - skb_headroom(skb);
+ if (nhead > 0) {
+ ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
+ if (ret < 0) {
+ pr_err("Error expanding ipsec packet %d\n",
+ ret);
+ goto err;
+ }
+ }
+
+ /* ipsec is not expecting ll header */
+ skb_pull(skb, ETH_HLEN);
+ ret = pktgen_output_ipsec(skb, pkt_dev);
+ if (ret) {
+ pr_err("Error creating ipsec packet %d\n", ret);
+ goto err;
+ }
+ /* restore ll */
+ eth = (__u8 *) skb_push(skb, ETH_HLEN);
+ memcpy(eth, pkt_dev->hh, 12);
+ *(u16 *) &eth[12] = protocol;
+
+ /* Update IPv4 header len as well as checksum value */
+ iph = ip_hdr(skb);
+ iph->tot_len = htons(skb->len - ETH_HLEN);
+ ip_send_check(iph);
+ }
+ }
+ return 1;
+err:
+ kfree_skb(skb);
+ return 0;
+}
+#endif
+
+static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
+{
+ unsigned int i;
+ for (i = 0; i < pkt_dev->nr_labels; i++)
+ *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
+
+ mpls--;
+ *mpls |= MPLS_STACK_BOTTOM;
+}
+
+static inline __be16 build_tci(unsigned int id, unsigned int cfi,
+ unsigned int prio)
+{
+ return htons(id | (cfi << 12) | (prio << 13));
+}
+
+static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
+ int datalen)
+{
+ struct timeval timestamp;
+ struct pktgen_hdr *pgh;
+
+ pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
+ datalen -= sizeof(*pgh);
+
+ if (pkt_dev->nfrags <= 0) {
+ memset(skb_put(skb, datalen), 0, datalen);
+ } else {
+ int frags = pkt_dev->nfrags;
+ int i, len;
+ int frag_len;
+
+
+ if (frags > MAX_SKB_FRAGS)
+ frags = MAX_SKB_FRAGS;
+ len = datalen - frags * PAGE_SIZE;
+ if (len > 0) {
+ memset(skb_put(skb, len), 0, len);
+ datalen = frags * PAGE_SIZE;
+ }
+
+ i = 0;
+ frag_len = (datalen/frags) < PAGE_SIZE ?
+ (datalen/frags) : PAGE_SIZE;
+ while (datalen > 0) {
+ if (unlikely(!pkt_dev->page)) {
+ int node = numa_node_id();
+
+ if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
+ node = pkt_dev->node;
+ pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
+ if (!pkt_dev->page)
+ break;
+ }
+ get_page(pkt_dev->page);
+ skb_frag_set_page(skb, i, pkt_dev->page);
+ skb_shinfo(skb)->frags[i].page_offset = 0;
+ /*last fragment, fill rest of data*/
+ if (i == (frags - 1))
+ skb_frag_size_set(&skb_shinfo(skb)->frags[i],
+ (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
+ else
+ skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
+ datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
+ skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
+ skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
+ i++;
+ skb_shinfo(skb)->nr_frags = i;
+ }
+ }
+
+ /* Stamp the time, and sequence number,
+ * convert them to network byte order
+ */
+ pgh->pgh_magic = htonl(PKTGEN_MAGIC);
+ pgh->seq_num = htonl(pkt_dev->seq_num);
+
+ if (pkt_dev->flags & F_NO_TIMESTAMP) {
+ pgh->tv_sec = 0;
+ pgh->tv_usec = 0;
+ } else {
+ do_gettimeofday(&timestamp);
+ pgh->tv_sec = htonl(timestamp.tv_sec);
+ pgh->tv_usec = htonl(timestamp.tv_usec);
+ }
+}
+
+static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
+ struct pktgen_dev *pkt_dev,
+ unsigned int extralen)
+{
+ struct sk_buff *skb = NULL;
+ unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
+ pkt_dev->pkt_overhead;
+
+ if (pkt_dev->flags & F_NODE) {
+ int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
+
+ skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
+ if (likely(skb)) {
+ skb_reserve(skb, NET_SKB_PAD);
+ skb->dev = dev;
+ }
+ } else {
+ skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
+ }
+
+ return skb;
+}
+
+static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ struct sk_buff *skb = NULL;
+ __u8 *eth;
+ struct udphdr *udph;
+ int datalen, iplen;
+ struct iphdr *iph;
+ __be16 protocol = htons(ETH_P_IP);
+ __be32 *mpls;
+ __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
+ __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
+ __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
+ __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
+ u16 queue_map;
+
+ if (pkt_dev->nr_labels)
+ protocol = htons(ETH_P_MPLS_UC);
+
+ if (pkt_dev->vlan_id != 0xffff)
+ protocol = htons(ETH_P_8021Q);
+
+ /* Update any of the values, used when we're incrementing various
+ * fields.
+ */
+ mod_cur_headers(pkt_dev);
+ queue_map = pkt_dev->cur_queue_map;
+
+ datalen = (odev->hard_header_len + 16) & ~0xf;
+
+ skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
+ if (!skb) {
+ sprintf(pkt_dev->result, "No memory");
+ return NULL;
+ }
+
+ prefetchw(skb->data);
+ skb_reserve(skb, datalen);
+
+ /* Reserve for ethernet and IP header */
+ eth = (__u8 *) skb_push(skb, 14);
+ mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
+ if (pkt_dev->nr_labels)
+ mpls_push(mpls, pkt_dev);
+
+ if (pkt_dev->vlan_id != 0xffff) {
+ if (pkt_dev->svlan_id != 0xffff) {
+ svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_tci = build_tci(pkt_dev->svlan_id,
+ pkt_dev->svlan_cfi,
+ pkt_dev->svlan_p);
+ svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_encapsulated_proto = htons(ETH_P_8021Q);
+ }
+ vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_tci = build_tci(pkt_dev->vlan_id,
+ pkt_dev->vlan_cfi,
+ pkt_dev->vlan_p);
+ vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_encapsulated_proto = htons(ETH_P_IP);
+ }
+
+ skb_set_mac_header(skb, 0);
+ skb_set_network_header(skb, skb->len);
+ iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
+
+ skb_set_transport_header(skb, skb->len);
+ udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
+ skb_set_queue_mapping(skb, queue_map);
+ skb->priority = pkt_dev->skb_priority;
+
+ memcpy(eth, pkt_dev->hh, 12);
+ *(__be16 *) & eth[12] = protocol;
+
+ /* Eth + IPh + UDPh + mpls */
+ datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
+ pkt_dev->pkt_overhead;
+ if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
+ datalen = sizeof(struct pktgen_hdr);
+
+ udph->source = htons(pkt_dev->cur_udp_src);
+ udph->dest = htons(pkt_dev->cur_udp_dst);
+ udph->len = htons(datalen + 8); /* DATA + udphdr */
+ udph->check = 0;
+
+ iph->ihl = 5;
+ iph->version = 4;
+ iph->ttl = 32;
+ iph->tos = pkt_dev->tos;
+ iph->protocol = IPPROTO_UDP; /* UDP */
+ iph->saddr = pkt_dev->cur_saddr;
+ iph->daddr = pkt_dev->cur_daddr;
+ iph->id = htons(pkt_dev->ip_id);
+ pkt_dev->ip_id++;
+ iph->frag_off = 0;
+ iplen = 20 + 8 + datalen;
+ iph->tot_len = htons(iplen);
+ ip_send_check(iph);
+ skb->protocol = protocol;
+ skb->dev = odev;
+ skb->pkt_type = PACKET_HOST;
+
+ pktgen_finalize_skb(pkt_dev, skb, datalen);
+
+ if (!(pkt_dev->flags & F_UDPCSUM)) {
+ skb->ip_summed = CHECKSUM_NONE;
+ } else if (odev->features & NETIF_F_V4_CSUM) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum = 0;
+ udp4_hwcsum(skb, iph->saddr, iph->daddr);
+ } else {
+ __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
+
+ /* add protocol-dependent pseudo-header */
+ udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
+ datalen + 8, IPPROTO_UDP, csum);
+
+ if (udph->check == 0)
+ udph->check = CSUM_MANGLED_0;
+ }
+
+#ifdef CONFIG_XFRM
+ if (!process_ipsec(pkt_dev, skb, protocol))
+ return NULL;
+#endif
+
+ return skb;
+}
+
+static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ struct sk_buff *skb = NULL;
+ __u8 *eth;
+ struct udphdr *udph;
+ int datalen, udplen;
+ struct ipv6hdr *iph;
+ __be16 protocol = htons(ETH_P_IPV6);
+ __be32 *mpls;
+ __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
+ __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
+ __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
+ __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
+ u16 queue_map;
+
+ if (pkt_dev->nr_labels)
+ protocol = htons(ETH_P_MPLS_UC);
+
+ if (pkt_dev->vlan_id != 0xffff)
+ protocol = htons(ETH_P_8021Q);
+
+ /* Update any of the values, used when we're incrementing various
+ * fields.
+ */
+ mod_cur_headers(pkt_dev);
+ queue_map = pkt_dev->cur_queue_map;
+
+ skb = pktgen_alloc_skb(odev, pkt_dev, 16);
+ if (!skb) {
+ sprintf(pkt_dev->result, "No memory");
+ return NULL;
+ }
+
+ prefetchw(skb->data);
+ skb_reserve(skb, 16);
+
+ /* Reserve for ethernet and IP header */
+ eth = (__u8 *) skb_push(skb, 14);
+ mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
+ if (pkt_dev->nr_labels)
+ mpls_push(mpls, pkt_dev);
+
+ if (pkt_dev->vlan_id != 0xffff) {
+ if (pkt_dev->svlan_id != 0xffff) {
+ svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_tci = build_tci(pkt_dev->svlan_id,
+ pkt_dev->svlan_cfi,
+ pkt_dev->svlan_p);
+ svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_encapsulated_proto = htons(ETH_P_8021Q);
+ }
+ vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_tci = build_tci(pkt_dev->vlan_id,
+ pkt_dev->vlan_cfi,
+ pkt_dev->vlan_p);
+ vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_encapsulated_proto = htons(ETH_P_IPV6);
+ }
+
+ skb_set_mac_header(skb, 0);
+ skb_set_network_header(skb, skb->len);
+ iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
+
+ skb_set_transport_header(skb, skb->len);
+ udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
+ skb_set_queue_mapping(skb, queue_map);
+ skb->priority = pkt_dev->skb_priority;
+
+ memcpy(eth, pkt_dev->hh, 12);
+ *(__be16 *) &eth[12] = protocol;
+
+ /* Eth + IPh + UDPh + mpls */
+ datalen = pkt_dev->cur_pkt_size - 14 -
+ sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
+ pkt_dev->pkt_overhead;
+
+ if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
+ datalen = sizeof(struct pktgen_hdr);
+ net_info_ratelimited("increased datalen to %d\n", datalen);
+ }
+
+ udplen = datalen + sizeof(struct udphdr);
+ udph->source = htons(pkt_dev->cur_udp_src);
+ udph->dest = htons(pkt_dev->cur_udp_dst);
+ udph->len = htons(udplen);
+ udph->check = 0;
+
+ *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
+
+ if (pkt_dev->traffic_class) {
+ /* Version + traffic class + flow (0) */
+ *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
+ }
+
+ iph->hop_limit = 32;
+
+ iph->payload_len = htons(udplen);
+ iph->nexthdr = IPPROTO_UDP;
+
+ iph->daddr = pkt_dev->cur_in6_daddr;
+ iph->saddr = pkt_dev->cur_in6_saddr;
+
+ skb->protocol = protocol;
+ skb->dev = odev;
+ skb->pkt_type = PACKET_HOST;
+
+ pktgen_finalize_skb(pkt_dev, skb, datalen);
+
+ if (!(pkt_dev->flags & F_UDPCSUM)) {
+ skb->ip_summed = CHECKSUM_NONE;
+ } else if (odev->features & NETIF_F_V6_CSUM) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = skb_transport_header(skb) - skb->head;
+ skb->csum_offset = offsetof(struct udphdr, check);
+ udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
+ } else {
+ __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
+
+ /* add protocol-dependent pseudo-header */
+ udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
+
+ if (udph->check == 0)
+ udph->check = CSUM_MANGLED_0;
+ }
+
+ return skb;
+}
+
+static struct sk_buff *fill_packet(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ if (pkt_dev->flags & F_IPV6)
+ return fill_packet_ipv6(odev, pkt_dev);
+ else
+ return fill_packet_ipv4(odev, pkt_dev);
+}
+
+static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
+{
+ pkt_dev->seq_num = 1;
+ pkt_dev->idle_acc = 0;
+ pkt_dev->sofar = 0;
+ pkt_dev->tx_bytes = 0;
+ pkt_dev->errors = 0;
+}
+
+/* Set up structure for sending pkts, clear counters */
+
+static void pktgen_run(struct pktgen_thread *t)
+{
+ struct pktgen_dev *pkt_dev;
+ int started = 0;
+
+ func_enter();
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
+
+ /*
+ * setup odev and create initial packet.
+ */
+ pktgen_setup_inject(pkt_dev);
+
+ if (pkt_dev->odev) {
+ pktgen_clear_counters(pkt_dev);
+ pkt_dev->skb = NULL;
+ pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
+
+ set_pkt_overhead(pkt_dev);
+
+ strcpy(pkt_dev->result, "Starting");
+ pkt_dev->running = 1; /* Cranke yeself! */
+ started++;
+ } else
+ strcpy(pkt_dev->result, "Error starting");
+ }
+ rcu_read_unlock();
+ if (started)
+ t->control &= ~(T_STOP);
+}
+
+static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
+{
+ struct pktgen_thread *t;
+
+ func_enter();
+
+ mutex_lock(&pktgen_thread_lock);
+
+ list_for_each_entry(t, &pn->pktgen_threads, th_list)
+ t->control |= T_STOP;
+
+ mutex_unlock(&pktgen_thread_lock);
+}
+
+static int thread_is_running(const struct pktgen_thread *t)
+{
+ const struct pktgen_dev *pkt_dev;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
+ if (pkt_dev->running) {
+ rcu_read_unlock();
+ return 1;
+ }
+ rcu_read_unlock();
+ return 0;
+}
+
+static int pktgen_wait_thread_run(struct pktgen_thread *t)
+{
+ while (thread_is_running(t)) {
+
+ msleep_interruptible(100);
+
+ if (signal_pending(current))
+ goto signal;
+ }
+ return 1;
+signal:
+ return 0;
+}
+
+static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
+{
+ struct pktgen_thread *t;
+ int sig = 1;
+
+ mutex_lock(&pktgen_thread_lock);
+
+ list_for_each_entry(t, &pn->pktgen_threads, th_list) {
+ sig = pktgen_wait_thread_run(t);
+ if (sig == 0)
+ break;
+ }
+
+ if (sig == 0)
+ list_for_each_entry(t, &pn->pktgen_threads, th_list)
+ t->control |= (T_STOP);
+
+ mutex_unlock(&pktgen_thread_lock);
+ return sig;
+}
+
+static void pktgen_run_all_threads(struct pktgen_net *pn)
+{
+ struct pktgen_thread *t;
+
+ func_enter();
+
+ mutex_lock(&pktgen_thread_lock);
+
+ list_for_each_entry(t, &pn->pktgen_threads, th_list)
+ t->control |= (T_RUN);
+
+ mutex_unlock(&pktgen_thread_lock);
+
+ /* Propagate thread->control */
+ schedule_timeout_interruptible(msecs_to_jiffies(125));
+
+ pktgen_wait_all_threads_run(pn);
+}
+
+static void pktgen_reset_all_threads(struct pktgen_net *pn)
+{
+ struct pktgen_thread *t;
+
+ func_enter();
+
+ mutex_lock(&pktgen_thread_lock);
+
+ list_for_each_entry(t, &pn->pktgen_threads, th_list)
+ t->control |= (T_REMDEVALL);
+
+ mutex_unlock(&pktgen_thread_lock);
+
+ /* Propagate thread->control */
+ schedule_timeout_interruptible(msecs_to_jiffies(125));
+
+ pktgen_wait_all_threads_run(pn);
+}
+
+static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
+{
+ __u64 bps, mbps, pps;
+ char *p = pkt_dev->result;
+ ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
+ pkt_dev->started_at);
+ ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
+
+ p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
+ (unsigned long long)ktime_to_us(elapsed),
+ (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
+ (unsigned long long)ktime_to_us(idle),
+ (unsigned long long)pkt_dev->sofar,
+ pkt_dev->cur_pkt_size, nr_frags);
+
+ pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
+ ktime_to_ns(elapsed));
+
+ bps = pps * 8 * pkt_dev->cur_pkt_size;
+
+ mbps = bps;
+ do_div(mbps, 1000000);
+ p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
+ (unsigned long long)pps,
+ (unsigned long long)mbps,
+ (unsigned long long)bps,
+ (unsigned long long)pkt_dev->errors);
+}
+
+/* Set stopped-at timer, remove from running list, do counters & statistics */
+static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
+{
+ int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
+
+ if (!pkt_dev->running) {
+ pr_warn("interface: %s is already stopped\n",
+ pkt_dev->odevname);
+ return -EINVAL;
+ }
+
+ pkt_dev->running = 0;
+ kfree_skb(pkt_dev->skb);
+ pkt_dev->skb = NULL;
+ pkt_dev->stopped_at = ktime_get();
+
+ show_results(pkt_dev, nr_frags);
+
+ return 0;
+}
+
+static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
+{
+ struct pktgen_dev *pkt_dev, *best = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
+ if (!pkt_dev->running)
+ continue;
+ if (best == NULL)
+ best = pkt_dev;
+ else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
+ best = pkt_dev;
+ }
+ rcu_read_unlock();
+
+ return best;
+}
+
+static void pktgen_stop(struct pktgen_thread *t)
+{
+ struct pktgen_dev *pkt_dev;
+
+ func_enter();
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
+ pktgen_stop_device(pkt_dev);
+ }
+
+ rcu_read_unlock();
+}
+
+/*
+ * one of our devices needs to be removed - find it
+ * and remove it
+ */
+static void pktgen_rem_one_if(struct pktgen_thread *t)
+{
+ struct list_head *q, *n;
+ struct pktgen_dev *cur;
+
+ func_enter();
+
+ list_for_each_safe(q, n, &t->if_list) {
+ cur = list_entry(q, struct pktgen_dev, list);
+
+ if (!cur->removal_mark)
+ continue;
+
+ kfree_skb(cur->skb);
+ cur->skb = NULL;
+
+ pktgen_remove_device(t, cur);
+
+ break;
+ }
+}
+
+static void pktgen_rem_all_ifs(struct pktgen_thread *t)
+{
+ struct list_head *q, *n;
+ struct pktgen_dev *cur;
+
+ func_enter();
+
+ /* Remove all devices, free mem */
+
+ list_for_each_safe(q, n, &t->if_list) {
+ cur = list_entry(q, struct pktgen_dev, list);
+
+ kfree_skb(cur->skb);
+ cur->skb = NULL;
+
+ pktgen_remove_device(t, cur);
+ }
+}
+
+static void pktgen_rem_thread(struct pktgen_thread *t)
+{
+ /* Remove from the thread list */
+ remove_proc_entry(t->tsk->comm, t->net->proc_dir);
+}
+
+static void pktgen_resched(struct pktgen_dev *pkt_dev)
+{
+ ktime_t idle_start = ktime_get();
+ schedule();
+ pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
+}
+
+static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
+{
+ ktime_t idle_start = ktime_get();
+
+ while (atomic_read(&(pkt_dev->skb->users)) != 1) {
+ if (signal_pending(current))
+ break;
+
+ if (need_resched())
+ pktgen_resched(pkt_dev);
+ else
+ cpu_relax();
+ }
+ pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
+}
+
+static void pktgen_xmit(struct pktgen_dev *pkt_dev)
+{
+ unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
+ struct net_device *odev = pkt_dev->odev;
+ struct netdev_queue *txq;
+ int ret;
+
+ /* If device is offline, then don't send */
+ if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
+ pktgen_stop_device(pkt_dev);
+ return;
+ }
+
+ /* This is max DELAY, this has special meaning of
+ * "never transmit"
+ */
+ if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
+ pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
+ return;
+ }
+
+ /* If no skb or clone count exhausted then get new one */
+ if (!pkt_dev->skb || (pkt_dev->last_ok &&
+ ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
+ /* build a new pkt */
+ kfree_skb(pkt_dev->skb);
+
+ pkt_dev->skb = fill_packet(odev, pkt_dev);
+ if (pkt_dev->skb == NULL) {
+ pr_err("ERROR: couldn't allocate skb in fill_packet\n");
+ schedule();
+ pkt_dev->clone_count--; /* back out increment, OOM */
+ return;
+ }
+ pkt_dev->last_pkt_size = pkt_dev->skb->len;
+ pkt_dev->allocated_skbs++;
+ pkt_dev->clone_count = 0; /* reset counter */
+ }
+
+ if (pkt_dev->delay && pkt_dev->last_ok)
+ spin(pkt_dev, pkt_dev->next_tx);
+
+ txq = skb_get_tx_queue(odev, pkt_dev->skb);
+
+ local_bh_disable();
+
+ HARD_TX_LOCK(odev, txq, smp_processor_id());
+
+ if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
+ ret = NETDEV_TX_BUSY;
+ pkt_dev->last_ok = 0;
+ goto unlock;
+ }
+ atomic_add(burst, &pkt_dev->skb->users);
+
+xmit_more:
+ ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
+
+ switch (ret) {
+ case NETDEV_TX_OK:
+ pkt_dev->last_ok = 1;
+ pkt_dev->sofar++;
+ pkt_dev->seq_num++;
+ pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
+ if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
+ goto xmit_more;
+ break;
+ case NET_XMIT_DROP:
+ case NET_XMIT_CN:
+ case NET_XMIT_POLICED:
+ /* skb has been consumed */
+ pkt_dev->errors++;
+ break;
+ default: /* Drivers are not supposed to return other values! */
+ net_info_ratelimited("%s xmit error: %d\n",
+ pkt_dev->odevname, ret);
+ pkt_dev->errors++;
+ /* fallthru */
+ case NETDEV_TX_LOCKED:
+ case NETDEV_TX_BUSY:
+ /* Retry it next time */
+ atomic_dec(&(pkt_dev->skb->users));
+ pkt_dev->last_ok = 0;
+ }
+ if (unlikely(burst))
+ atomic_sub(burst, &pkt_dev->skb->users);
+unlock:
+ HARD_TX_UNLOCK(odev, txq);
+
+ local_bh_enable();
+
+ /* If pkt_dev->count is zero, then run forever */
+ if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
+ pktgen_wait_for_skb(pkt_dev);
+
+ /* Done with this */
+ pktgen_stop_device(pkt_dev);
+ }
+}
+
+/*
+ * Main loop of the thread goes here
+ */
+
+static int pktgen_thread_worker(void *arg)
+{
+ DEFINE_WAIT(wait);
+ struct pktgen_thread *t = arg;
+ struct pktgen_dev *pkt_dev = NULL;
+ int cpu = t->cpu;
+
+ BUG_ON(smp_processor_id() != cpu);
+
+ init_waitqueue_head(&t->queue);
+ complete(&t->start_done);
+
+ pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
+
+ set_freezable();
+
+ __set_current_state(TASK_RUNNING);
+
+ while (!kthread_should_stop()) {
+ pkt_dev = next_to_run(t);
+
+ if (unlikely(!pkt_dev && t->control == 0)) {
+ if (t->net->pktgen_exiting)
+ break;
+ wait_event_interruptible_timeout(t->queue,
+ t->control != 0,
+ HZ/10);
+ try_to_freeze();
+ continue;
+ }
+
+ if (likely(pkt_dev)) {
+ pktgen_xmit(pkt_dev);
+
+ if (need_resched())
+ pktgen_resched(pkt_dev);
+ else
+ cpu_relax();
+ }
+
+ if (t->control & T_STOP) {
+ pktgen_stop(t);
+ t->control &= ~(T_STOP);
+ }
+
+ if (t->control & T_RUN) {
+ pktgen_run(t);
+ t->control &= ~(T_RUN);
+ }
+
+ if (t->control & T_REMDEVALL) {
+ pktgen_rem_all_ifs(t);
+ t->control &= ~(T_REMDEVALL);
+ }
+
+ if (t->control & T_REMDEV) {
+ pktgen_rem_one_if(t);
+ t->control &= ~(T_REMDEV);
+ }
+
+ try_to_freeze();
+ }
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ pr_debug("%s stopping all device\n", t->tsk->comm);
+ pktgen_stop(t);
+
+ pr_debug("%s removing all device\n", t->tsk->comm);
+ pktgen_rem_all_ifs(t);
+
+ pr_debug("%s removing thread\n", t->tsk->comm);
+ pktgen_rem_thread(t);
+
+ /* Wait for kthread_stop */
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ __set_current_state(TASK_RUNNING);
+
+ return 0;
+}
+
+static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
+ const char *ifname, bool exact)
+{
+ struct pktgen_dev *p, *pkt_dev = NULL;
+ size_t len = strlen(ifname);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(p, &t->if_list, list)
+ if (strncmp(p->odevname, ifname, len) == 0) {
+ if (p->odevname[len]) {
+ if (exact || p->odevname[len] != '@')
+ continue;
+ }
+ pkt_dev = p;
+ break;
+ }
+
+ rcu_read_unlock();
+ pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
+ return pkt_dev;
+}
+
+/*
+ * Adds a dev at front of if_list.
+ */
+
+static int add_dev_to_thread(struct pktgen_thread *t,
+ struct pktgen_dev *pkt_dev)
+{
+ int rv = 0;
+
+ /* This function cannot be called concurrently, as its called
+ * under pktgen_thread_lock mutex, but it can run from
+ * userspace on another CPU than the kthread. The if_lock()
+ * is used here to sync with concurrent instances of
+ * _rem_dev_from_if_list() invoked via kthread, which is also
+ * updating the if_list */
+ if_lock(t);
+
+ if (pkt_dev->pg_thread) {
+ pr_err("ERROR: already assigned to a thread\n");
+ rv = -EBUSY;
+ goto out;
+ }
+
+ pkt_dev->running = 0;
+ pkt_dev->pg_thread = t;
+ list_add_rcu(&pkt_dev->list, &t->if_list);
+
+out:
+ if_unlock(t);
+ return rv;
+}
+
+/* Called under thread lock */
+
+static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
+{
+ struct pktgen_dev *pkt_dev;
+ int err;
+ int node = cpu_to_node(t->cpu);
+
+ /* We don't allow a device to be on several threads */
+
+ pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
+ if (pkt_dev) {
+ pr_err("ERROR: interface already used\n");
+ return -EBUSY;
+ }
+
+ pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
+ if (!pkt_dev)
+ return -ENOMEM;
+
+ strcpy(pkt_dev->odevname, ifname);
+ pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
+ node);
+ if (pkt_dev->flows == NULL) {
+ kfree(pkt_dev);
+ return -ENOMEM;
+ }
+
+ pkt_dev->removal_mark = 0;
+ pkt_dev->nfrags = 0;
+ pkt_dev->delay = pg_delay_d;
+ pkt_dev->count = pg_count_d;
+ pkt_dev->sofar = 0;
+ pkt_dev->udp_src_min = 9; /* sink port */
+ pkt_dev->udp_src_max = 9;
+ pkt_dev->udp_dst_min = 9;
+ pkt_dev->udp_dst_max = 9;
+ pkt_dev->vlan_p = 0;
+ pkt_dev->vlan_cfi = 0;
+ pkt_dev->vlan_id = 0xffff;
+ pkt_dev->svlan_p = 0;
+ pkt_dev->svlan_cfi = 0;
+ pkt_dev->svlan_id = 0xffff;
+ pkt_dev->burst = 1;
+ pkt_dev->node = -1;
+
+ err = pktgen_setup_dev(t->net, pkt_dev, ifname);
+ if (err)
+ goto out1;
+ if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
+ pkt_dev->clone_skb = pg_clone_skb_d;
+
+ pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
+ &pktgen_if_fops, pkt_dev);
+ if (!pkt_dev->entry) {
+ pr_err("cannot create %s/%s procfs entry\n",
+ PG_PROC_DIR, ifname);
+ err = -EINVAL;
+ goto out2;
+ }
+#ifdef CONFIG_XFRM
+ pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
+ pkt_dev->ipsproto = IPPROTO_ESP;
+
+ /* xfrm tunnel mode needs additional dst to extract outter
+ * ip header protocol/ttl/id field, here creat a phony one.
+ * instead of looking for a valid rt, which definitely hurting
+ * performance under such circumstance.
+ */
+ pkt_dev->dstops.family = AF_INET;
+ pkt_dev->dst.dev = pkt_dev->odev;
+ dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
+ pkt_dev->dst.child = &pkt_dev->dst;
+ pkt_dev->dst.ops = &pkt_dev->dstops;
+#endif
+
+ return add_dev_to_thread(t, pkt_dev);
+out2:
+ dev_put(pkt_dev->odev);
+out1:
+#ifdef CONFIG_XFRM
+ free_SAs(pkt_dev);
+#endif
+ vfree(pkt_dev->flows);
+ kfree(pkt_dev);
+ return err;
+}
+
+static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
+{
+ struct pktgen_thread *t;
+ struct proc_dir_entry *pe;
+ struct task_struct *p;
+
+ t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
+ cpu_to_node(cpu));
+ if (!t) {
+ pr_err("ERROR: out of memory, can't create new thread\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&t->if_lock);
+ t->cpu = cpu;
+
+ INIT_LIST_HEAD(&t->if_list);
+
+ list_add_tail(&t->th_list, &pn->pktgen_threads);
+ init_completion(&t->start_done);
+
+ p = kthread_create_on_node(pktgen_thread_worker,
+ t,
+ cpu_to_node(cpu),
+ "kpktgend_%d", cpu);
+ if (IS_ERR(p)) {
+ pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
+ list_del(&t->th_list);
+ kfree(t);
+ return PTR_ERR(p);
+ }
+ kthread_bind(p, cpu);
+ t->tsk = p;
+
+ pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
+ &pktgen_thread_fops, t);
+ if (!pe) {
+ pr_err("cannot create %s/%s procfs entry\n",
+ PG_PROC_DIR, t->tsk->comm);
+ kthread_stop(p);
+ list_del(&t->th_list);
+ kfree(t);
+ return -EINVAL;
+ }
+
+ t->net = pn;
+ wake_up_process(p);
+ wait_for_completion(&t->start_done);
+
+ return 0;
+}
+
+/*
+ * Removes a device from the thread if_list.
+ */
+static void _rem_dev_from_if_list(struct pktgen_thread *t,
+ struct pktgen_dev *pkt_dev)
+{
+ struct list_head *q, *n;
+ struct pktgen_dev *p;
+
+ if_lock(t);
+ list_for_each_safe(q, n, &t->if_list) {
+ p = list_entry(q, struct pktgen_dev, list);
+ if (p == pkt_dev)
+ list_del_rcu(&p->list);
+ }
+ if_unlock(t);
+}
+
+static int pktgen_remove_device(struct pktgen_thread *t,
+ struct pktgen_dev *pkt_dev)
+{
+ pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
+
+ if (pkt_dev->running) {
+ pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
+ pktgen_stop_device(pkt_dev);
+ }
+
+ /* Dis-associate from the interface */
+
+ if (pkt_dev->odev) {
+ dev_put(pkt_dev->odev);
+ pkt_dev->odev = NULL;
+ }
+
+ /* Remove proc before if_list entry, because add_device uses
+ * list to determine if interface already exist, avoid race
+ * with proc_create_data() */
+ proc_remove(pkt_dev->entry);
+
+ /* And update the thread if_list */
+ _rem_dev_from_if_list(t, pkt_dev);
+
+#ifdef CONFIG_XFRM
+ free_SAs(pkt_dev);
+#endif
+ vfree(pkt_dev->flows);
+ if (pkt_dev->page)
+ put_page(pkt_dev->page);
+ kfree_rcu(pkt_dev, rcu);
+ return 0;
+}
+
+static int __net_init pg_net_init(struct net *net)
+{
+ struct pktgen_net *pn = net_generic(net, pg_net_id);
+ struct proc_dir_entry *pe;
+ int cpu, ret = 0;
+
+ pn->net = net;
+ INIT_LIST_HEAD(&pn->pktgen_threads);
+ pn->pktgen_exiting = false;
+ pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
+ if (!pn->proc_dir) {
+ pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
+ return -ENODEV;
+ }
+ pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
+ if (pe == NULL) {
+ pr_err("cannot create %s procfs entry\n", PGCTRL);
+ ret = -EINVAL;
+ goto remove;
+ }
+
+ for_each_online_cpu(cpu) {
+ int err;
+
+ err = pktgen_create_thread(cpu, pn);
+ if (err)
+ pr_warn("Cannot create thread for cpu %d (%d)\n",
+ cpu, err);
+ }
+
+ if (list_empty(&pn->pktgen_threads)) {
+ pr_err("Initialization failed for all threads\n");
+ ret = -ENODEV;
+ goto remove_entry;
+ }
+
+ return 0;
+
+remove_entry:
+ remove_proc_entry(PGCTRL, pn->proc_dir);
+remove:
+ remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
+ return ret;
+}
+
+static void __net_exit pg_net_exit(struct net *net)
+{
+ struct pktgen_net *pn = net_generic(net, pg_net_id);
+ struct pktgen_thread *t;
+ struct list_head *q, *n;
+ LIST_HEAD(list);
+
+ /* Stop all interfaces & threads */
+ pn->pktgen_exiting = true;
+
+ mutex_lock(&pktgen_thread_lock);
+ list_splice_init(&pn->pktgen_threads, &list);
+ mutex_unlock(&pktgen_thread_lock);
+
+ list_for_each_safe(q, n, &list) {
+ t = list_entry(q, struct pktgen_thread, th_list);
+ list_del(&t->th_list);
+ kthread_stop(t->tsk);
+ kfree(t);
+ }
+
+ remove_proc_entry(PGCTRL, pn->proc_dir);
+ remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
+}
+
+static struct pernet_operations pg_net_ops = {
+ .init = pg_net_init,
+ .exit = pg_net_exit,
+ .id = &pg_net_id,
+ .size = sizeof(struct pktgen_net),
+};
+
+static int __init pg_init(void)
+{
+ int ret = 0;
+
+ pr_info("%s", version);
+ ret = register_pernet_subsys(&pg_net_ops);
+ if (ret)
+ return ret;
+ ret = register_netdevice_notifier(&pktgen_notifier_block);
+ if (ret)
+ unregister_pernet_subsys(&pg_net_ops);
+
+ return ret;
+}
+
+static void __exit pg_cleanup(void)
+{
+ unregister_netdevice_notifier(&pktgen_notifier_block);
+ unregister_pernet_subsys(&pg_net_ops);
+ /* Don't need rcu_barrier() due to use of kfree_rcu() */
+}
+
+module_init(pg_init);
+module_exit(pg_cleanup);
+
+MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
+MODULE_DESCRIPTION("Packet Generator tool");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(VERSION);
+module_param(pg_count_d, int, 0);
+MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
+module_param(pg_delay_d, int, 0);
+MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
+module_param(pg_clone_skb_d, int, 0);
+MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 22:50:05 +0000