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Diffstat (limited to 'net/core/pktgen.c')
| -rw-r--r-- | net/core/pktgen.c | 3896 |
1 files changed, 3896 insertions, 0 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c new file mode 100644 index 000000000..c1e3d3bea --- /dev/null +++ b/net/core/pktgen.c @@ -0,0 +1,3896 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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> + * + * 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.rst 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 <linux/mmzone.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 "2.75" +#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__); + +#define PKT_FLAGS \ + pf(IPV6) /* Interface in IPV6 Mode */ \ + pf(IPSRC_RND) /* IP-Src Random */ \ + pf(IPDST_RND) /* IP-Dst Random */ \ + pf(TXSIZE_RND) /* Transmit size is random */ \ + pf(UDPSRC_RND) /* UDP-Src Random */ \ + pf(UDPDST_RND) /* UDP-Dst Random */ \ + pf(UDPCSUM) /* Include UDP checksum */ \ + pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \ + pf(MPLS_RND) /* Random MPLS labels */ \ + pf(QUEUE_MAP_RND) /* queue map Random */ \ + pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \ + pf(FLOW_SEQ) /* Sequential flows */ \ + pf(IPSEC) /* ipsec on for flows */ \ + pf(MACSRC_RND) /* MAC-Src Random */ \ + pf(MACDST_RND) /* MAC-Dst Random */ \ + pf(VID_RND) /* Random VLAN ID */ \ + pf(SVID_RND) /* Random SVLAN ID */ \ + pf(NODE) /* Node memory alloc*/ \ + +#define pf(flag) flag##_SHIFT, +enum pkt_flags { + PKT_FLAGS +}; +#undef pf + +/* Device flag bits */ +#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT); +PKT_FLAGS +#undef pf + +#define pf(flag) __stringify(flag), +static char *pkt_flag_names[] = { + PKT_FLAGS +}; +#undef pf + +#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names) + +/* 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 */ + +/* Xmit modes */ +#define M_START_XMIT 0 /* Default normal TX */ +#define M_NETIF_RECEIVE 1 /* Inject packets into stack */ +#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */ + +/* If lock -- protects updating of if_list */ +#define if_lock(t) mutex_lock(&(t->if_lock)); +#define if_unlock(t) mutex_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 xmit_mode; + int min_pkt_size; + int max_pkt_size; + int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ + int nfrags; + int removal_mark; /* non-zero => the device is marked for + * removal by worker thread */ + + 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 */ + + __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 xfrm_dst xdst; + struct dst_ops dstops; +#endif + char result[512]; +}; + +struct pktgen_hdr { + __be32 pgh_magic; + __be32 seq_num; + __be32 tv_sec; + __be32 tv_usec; +}; + + +static unsigned 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 { + struct mutex 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 + return -EINVAL; + + return count; +} + +static int pgctrl_open(struct inode *inode, struct file *file) +{ + return single_open(file, pgctrl_show, PDE_DATA(inode)); +} + +static const struct proc_ops pktgen_proc_ops = { + .proc_open = pgctrl_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_write = pgctrl_write, + .proc_release = single_release, +}; + +static int pktgen_if_show(struct seq_file *seq, void *v) +{ + const struct pktgen_dev *pkt_dev = seq->private; + ktime_t stopped; + unsigned int i; + u64 idle; + + seq_printf(seq, + "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", + (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, + pkt_dev->max_pkt_size); + + seq_printf(seq, + " frags: %d delay: %llu clone_skb: %d ifname: %s\n", + pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, + pkt_dev->clone_skb, pkt_dev->odevname); + + seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, + pkt_dev->lflow); + + seq_printf(seq, + " queue_map_min: %u queue_map_max: %u\n", + pkt_dev->queue_map_min, + pkt_dev->queue_map_max); + + if (pkt_dev->skb_priority) + seq_printf(seq, " skb_priority: %u\n", + pkt_dev->skb_priority); + + if (pkt_dev->flags & F_IPV6) { + seq_printf(seq, + " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" + " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", + &pkt_dev->in6_saddr, + &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, + &pkt_dev->in6_daddr, + &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); + } else { + seq_printf(seq, + " dst_min: %s dst_max: %s\n", + pkt_dev->dst_min, pkt_dev->dst_max); + seq_printf(seq, + " src_min: %s src_max: %s\n", + pkt_dev->src_min, pkt_dev->src_max); + } + + seq_puts(seq, " src_mac: "); + + seq_printf(seq, "%pM ", + is_zero_ether_addr(pkt_dev->src_mac) ? + pkt_dev->odev->dev_addr : pkt_dev->src_mac); + + seq_puts(seq, "dst_mac: "); + seq_printf(seq, "%pM\n", pkt_dev->dst_mac); + + seq_printf(seq, + " udp_src_min: %d udp_src_max: %d" + " udp_dst_min: %d udp_dst_max: %d\n", + pkt_dev->udp_src_min, pkt_dev->udp_src_max, + pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); + + seq_printf(seq, + " src_mac_count: %d dst_mac_count: %d\n", + pkt_dev->src_mac_count, pkt_dev->dst_mac_count); + + if (pkt_dev->nr_labels) { + seq_puts(seq, " mpls: "); + for (i = 0; i < pkt_dev->nr_labels; i++) + seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), + i == pkt_dev->nr_labels-1 ? "\n" : ", "); + } + + if (pkt_dev->vlan_id != 0xffff) + seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", + pkt_dev->vlan_id, pkt_dev->vlan_p, + pkt_dev->vlan_cfi); + + if (pkt_dev->svlan_id != 0xffff) + seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", + pkt_dev->svlan_id, pkt_dev->svlan_p, + pkt_dev->svlan_cfi); + + if (pkt_dev->tos) + seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); + + if (pkt_dev->traffic_class) + seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); + + if (pkt_dev->burst > 1) + seq_printf(seq, " burst: %d\n", pkt_dev->burst); + + if (pkt_dev->node >= 0) + seq_printf(seq, " node: %d\n", pkt_dev->node); + + if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) + seq_puts(seq, " xmit_mode: netif_receive\n"); + else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) + seq_puts(seq, " xmit_mode: xmit_queue\n"); + + seq_puts(seq, " Flags: "); + + for (i = 0; i < NR_PKT_FLAGS; i++) { + if (i == FLOW_SEQ_SHIFT) + if (!pkt_dev->cflows) + continue; + + if (pkt_dev->flags & (1 << i)) { + seq_printf(seq, "%s ", pkt_flag_names[i]); +#ifdef CONFIG_XFRM + if (i == IPSEC_SHIFT && pkt_dev->spi) + seq_printf(seq, "spi:%u ", pkt_dev->spi); +#endif + } else if (i == FLOW_SEQ_SHIFT) { + seq_puts(seq, "FLOW_RND "); + } + } + + seq_puts(seq, "\n"); + + /* not really stopped, more like last-running-at */ + stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; + idle = pkt_dev->idle_acc; + do_div(idle, NSEC_PER_USEC); + + seq_printf(seq, + "Current:\n pkts-sofar: %llu errors: %llu\n", + (unsigned long long)pkt_dev->sofar, + (unsigned long long)pkt_dev->errors); + + seq_printf(seq, + " started: %lluus stopped: %lluus idle: %lluus\n", + (unsigned long long) ktime_to_us(pkt_dev->started_at), + (unsigned long long) ktime_to_us(stopped), + (unsigned long long) idle); + + seq_printf(seq, + " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", + pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, + pkt_dev->cur_src_mac_offset); + + if (pkt_dev->flags & F_IPV6) { + seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", + &pkt_dev->cur_in6_saddr, + &pkt_dev->cur_in6_daddr); + } else + seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", + &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); + + seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", + pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); + + seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); + + seq_printf(seq, " flows: %u\n", pkt_dev->nflows); + + if (pkt_dev->result[0]) + seq_printf(seq, "Result: %s\n", pkt_dev->result); + else + seq_puts(seq, "Result: Idle\n"); + + return 0; +} + + +static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, + __u32 *num) +{ + int i = 0; + *num = 0; + + for (; i < maxlen; i++) { + int value; + char c; + *num <<= 4; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + value = hex_to_bin(c); + if (value >= 0) + *num |= value; + else + break; + } + return i; +} + +static int count_trail_chars(const char __user * user_buffer, + unsigned int maxlen) +{ + int i; + + for (i = 0; i < maxlen; i++) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + switch (c) { + case '\"': + case '\n': + case '\r': + case '\t': + case ' ': + case '=': + break; + default: + goto done; + } + } +done: + return i; +} + +static long num_arg(const char __user *user_buffer, unsigned long maxlen, + unsigned long *num) +{ + int i; + *num = 0; + + for (i = 0; i < maxlen; i++) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + if ((c >= '0') && (c <= '9')) { + *num *= 10; + *num += c - '0'; + } else + break; + } + return i; +} + +static int strn_len(const char __user * user_buffer, unsigned int maxlen) +{ + int i; + + for (i = 0; i < maxlen; i++) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + switch (c) { + case '\"': + case '\n': + case '\r': + case '\t': + case ' ': + goto done_str; + default: + break; + } + } +done_str: + return i; +} + +static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) +{ + unsigned int n = 0; + char c; + ssize_t i = 0; + int len; + + pkt_dev->nr_labels = 0; + do { + __u32 tmp; + len = hex32_arg(&buffer[i], 8, &tmp); + if (len <= 0) + return len; + pkt_dev->labels[n] = htonl(tmp); + if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) + pkt_dev->flags |= F_MPLS_RND; + i += len; + if (get_user(c, &buffer[i])) + return -EFAULT; + i++; + n++; + if (n >= MAX_MPLS_LABELS) + return -E2BIG; + } while (c == ','); + + pkt_dev->nr_labels = n; + return i; +} + +static __u32 pktgen_read_flag(const char *f, bool *disable) +{ + __u32 i; + + if (f[0] == '!') { + *disable = true; + f++; + } + + for (i = 0; i < NR_PKT_FLAGS; i++) { + if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT) + continue; + + /* allow only disabling ipv6 flag */ + if (!*disable && i == IPV6_SHIFT) + continue; + + if (strcmp(f, pkt_flag_names[i]) == 0) + return 1 << i; + } + + if (strcmp(f, "FLOW_RND") == 0) { + *disable = !*disable; + return F_FLOW_SEQ; + } + + return 0; +} + +static ssize_t pktgen_if_write(struct file *file, + const char __user * user_buffer, size_t count, + loff_t * offset) +{ + struct seq_file *seq = file->private_data; + struct pktgen_dev *pkt_dev = seq->private; + int i, max, len; + char name[16], valstr[32]; + unsigned long value = 0; + char *pg_result = NULL; + int tmp = 0; + char buf[128]; + + pg_result = &(pkt_dev->result[0]); + + if (count < 1) { + pr_warn("wrong command format\n"); + return -EINVAL; + } + + max = count; + tmp = count_trail_chars(user_buffer, max); + if (tmp < 0) { + pr_warn("illegal format\n"); + return tmp; + } + i = tmp; + + /* Read variable name */ + + len = strn_len(&user_buffer[i], sizeof(name) - 1); + if (len < 0) + return len; + + memset(name, 0, sizeof(name)); + if (copy_from_user(name, &user_buffer[i], len)) + return -EFAULT; + i += len; + + max = count - i; + len = count_trail_chars(&user_buffer[i], max); + if (len < 0) + return len; + + i += len; + + if (debug) { + size_t copy = min_t(size_t, count + 1, 1024); + char *tp = strndup_user(user_buffer, copy); + + if (IS_ERR(tp)) + return PTR_ERR(tp); + + pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp); + kfree(tp); + } + + if (!strcmp(name, "min_pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value < 14 + 20 + 8) + value = 14 + 20 + 8; + if (value != pkt_dev->min_pkt_size) { + pkt_dev->min_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: min_pkt_size=%d", + pkt_dev->min_pkt_size); + return count; + } + + if (!strcmp(name, "max_pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value < 14 + 20 + 8) + value = 14 + 20 + 8; + if (value != pkt_dev->max_pkt_size) { + pkt_dev->max_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: max_pkt_size=%d", + pkt_dev->max_pkt_size); + return count; + } + + /* Shortcut for min = max */ + + if (!strcmp(name, "pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value < 14 + 20 + 8) + value = 14 + 20 + 8; + if (value != pkt_dev->min_pkt_size) { + pkt_dev->min_pkt_size = value; + pkt_dev->max_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size); + return count; + } + + if (!strcmp(name, "debug")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + debug = value; + sprintf(pg_result, "OK: debug=%u", debug); + return count; + } + + if (!strcmp(name, "frags")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->nfrags = value; + sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags); + return count; + } + if (!strcmp(name, "delay")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value == 0x7FFFFFFF) + pkt_dev->delay = ULLONG_MAX; + else + pkt_dev->delay = (u64)value; + + sprintf(pg_result, "OK: delay=%llu", + (unsigned long long) pkt_dev->delay); + return count; + } + if (!strcmp(name, "rate")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (!value) + return len; + pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; + if (debug) + pr_info("Delay set at: %llu ns\n", pkt_dev->delay); + + sprintf(pg_result, "OK: rate=%lu", value); + return count; + } + if (!strcmp(name, "ratep")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (!value) + return len; + pkt_dev->delay = NSEC_PER_SEC/value; + if (debug) + pr_info("Delay set at: %llu ns\n", pkt_dev->delay); + + sprintf(pg_result, "OK: rate=%lu", value); + return count; + } + if (!strcmp(name, "udp_src_min")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value != pkt_dev->udp_src_min) { + pkt_dev->udp_src_min = value; + pkt_dev->cur_udp_src = value; + } + sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); + return count; + } + if (!strcmp(name, "udp_dst_min")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value != pkt_dev->udp_dst_min) { + pkt_dev->udp_dst_min = value; + pkt_dev->cur_udp_dst = value; + } + sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); + return count; + } + if (!strcmp(name, "udp_src_max")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value != pkt_dev->udp_src_max) { + pkt_dev->udp_src_max = value; + pkt_dev->cur_udp_src = value; + } + sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); + return count; + } + if (!strcmp(name, "udp_dst_max")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value != pkt_dev->udp_dst_max) { + pkt_dev->udp_dst_max = value; + pkt_dev->cur_udp_dst = value; + } + sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); + return count; + } + if (!strcmp(name, "clone_skb")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + if ((value > 0) && + ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) || + !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) + return -ENOTSUPP; + i += len; + pkt_dev->clone_skb = value; + + sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); + return count; + } + if (!strcmp(name, "count")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->count = value; + sprintf(pg_result, "OK: count=%llu", + (unsigned long long)pkt_dev->count); + return count; + } + if (!strcmp(name, "src_mac_count")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (pkt_dev->src_mac_count != value) { + pkt_dev->src_mac_count = value; + pkt_dev->cur_src_mac_offset = 0; + } + sprintf(pg_result, "OK: src_mac_count=%d", + pkt_dev->src_mac_count); + return count; + } + if (!strcmp(name, "dst_mac_count")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (pkt_dev->dst_mac_count != value) { + pkt_dev->dst_mac_count = value; + pkt_dev->cur_dst_mac_offset = 0; + } + sprintf(pg_result, "OK: dst_mac_count=%d", + pkt_dev->dst_mac_count); + return count; + } + if (!strcmp(name, "burst")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if ((value > 1) && + ((pkt_dev->xmit_mode == M_QUEUE_XMIT) || + ((pkt_dev->xmit_mode == M_START_XMIT) && + (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))))) + return -ENOTSUPP; + pkt_dev->burst = value < 1 ? 1 : value; + sprintf(pg_result, "OK: burst=%u", pkt_dev->burst); + return count; + } + if (!strcmp(name, "node")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + + if (node_possible(value)) { + pkt_dev->node = value; + sprintf(pg_result, "OK: node=%d", pkt_dev->node); + if (pkt_dev->page) { + put_page(pkt_dev->page); + pkt_dev->page = NULL; + } + } + else + sprintf(pg_result, "ERROR: node not possible"); + return count; + } + if (!strcmp(name, "xmit_mode")) { + char f[32]; + + memset(f, 0, 32); + len = strn_len(&user_buffer[i], sizeof(f) - 1); + if (len < 0) + return len; + + if (copy_from_user(f, &user_buffer[i], len)) + return -EFAULT; + i += len; + + if (strcmp(f, "start_xmit") == 0) { + pkt_dev->xmit_mode = M_START_XMIT; + } else if (strcmp(f, "netif_receive") == 0) { + /* clone_skb set earlier, not supported in this mode */ + if (pkt_dev->clone_skb > 0) + return -ENOTSUPP; + + pkt_dev->xmit_mode = M_NETIF_RECEIVE; + + /* make sure new packet is allocated every time + * pktgen_xmit() is called + */ + pkt_dev->last_ok = 1; + + /* override clone_skb if user passed default value + * at module loading time + */ + pkt_dev->clone_skb = 0; + } else if (strcmp(f, "queue_xmit") == 0) { + pkt_dev->xmit_mode = M_QUEUE_XMIT; + pkt_dev->last_ok = 1; + } else { + sprintf(pg_result, + "xmit_mode -:%s:- unknown\nAvailable modes: %s", + f, "start_xmit, netif_receive\n"); + return count; + } + sprintf(pg_result, "OK: xmit_mode=%s", f); + return count; + } + if (!strcmp(name, "flag")) { + __u32 flag; + char f[32]; + bool disable = false; + + memset(f, 0, 32); + len = strn_len(&user_buffer[i], sizeof(f) - 1); + if (len < 0) + return len; + + if (copy_from_user(f, &user_buffer[i], len)) + return -EFAULT; + i += len; + + flag = pktgen_read_flag(f, &disable); + + if (flag) { + if (disable) + pkt_dev->flags &= ~flag; + else + pkt_dev->flags |= flag; + } else { + sprintf(pg_result, + "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", + f, + "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " + "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " + "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " + "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " + "NO_TIMESTAMP, " +#ifdef CONFIG_XFRM + "IPSEC, " +#endif + "NODE_ALLOC\n"); + return count; + } + sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); + return count; + } + if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); + if (len < 0) + return len; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->dst_min) != 0) { + memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); + strcpy(pkt_dev->dst_min, buf); + pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); + pkt_dev->cur_daddr = pkt_dev->daddr_min; + } + if (debug) + pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); + i += len; + sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); + return count; + } + if (!strcmp(name, "dst_max")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); + if (len < 0) + return len; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->dst_max) != 0) { + memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); + strcpy(pkt_dev->dst_max, buf); + pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); + pkt_dev->cur_daddr = pkt_dev->daddr_max; + } + if (debug) + pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); + i += len; + sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); + return count; + } + if (!strcmp(name, "dst6")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) + return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); + snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); + + pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; + + if (debug) + pr_debug("dst6 set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6=%s", buf); + return count; + } + if (!strcmp(name, "dst6_min")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) + return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); + snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); + + pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; + if (debug) + pr_debug("dst6_min set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_min=%s", buf); + return count; + } + if (!strcmp(name, "dst6_max")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) + return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); + snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); + + if (debug) + pr_debug("dst6_max set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_max=%s", buf); + return count; + } + if (!strcmp(name, "src6")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) + return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); + snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); + + pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; + + if (debug) + pr_debug("src6 set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: src6=%s", buf); + return count; + } + if (!strcmp(name, "src_min")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); + if (len < 0) + return len; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->src_min) != 0) { + memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); + strcpy(pkt_dev->src_min, buf); + pkt_dev->saddr_min = in_aton(pkt_dev->src_min); + pkt_dev->cur_saddr = pkt_dev->saddr_min; + } + if (debug) + pr_debug("src_min set to: %s\n", pkt_dev->src_min); + i += len; + sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); + return count; + } + if (!strcmp(name, "src_max")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); + if (len < 0) + return len; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->src_max) != 0) { + memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); + strcpy(pkt_dev->src_max, buf); + pkt_dev->saddr_max = in_aton(pkt_dev->src_max); + pkt_dev->cur_saddr = pkt_dev->saddr_max; + } + if (debug) + pr_debug("src_max set to: %s\n", pkt_dev->src_max); + i += len; + sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); + return count; + } + if (!strcmp(name, "dst_mac")) { + len = strn_len(&user_buffer[i], sizeof(valstr) - 1); + if (len < 0) + return len; + + memset(valstr, 0, sizeof(valstr)); + if (copy_from_user(valstr, &user_buffer[i], len)) + return -EFAULT; + + if (!mac_pton(valstr, pkt_dev->dst_mac)) + return -EINVAL; + /* Set up Dest MAC */ + ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); + + sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); + return count; + } + if (!strcmp(name, "src_mac")) { + len = strn_len(&user_buffer[i], sizeof(valstr) - 1); + if (len < 0) + return len; + + memset(valstr, 0, sizeof(valstr)); + if (copy_from_user(valstr, &user_buffer[i], len)) + return -EFAULT; + + if (!mac_pton(valstr, pkt_dev->src_mac)) + return -EINVAL; + /* Set up Src MAC */ + ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); + + sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); + return count; + } + + if (!strcmp(name, "clear_counters")) { + pktgen_clear_counters(pkt_dev); + sprintf(pg_result, "OK: Clearing counters.\n"); + return count; + } + + if (!strcmp(name, "flows")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + if (value > MAX_CFLOWS) + value = MAX_CFLOWS; + + pkt_dev->cflows = value; + sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); + return count; + } +#ifdef CONFIG_XFRM + if (!strcmp(name, "spi")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->spi = value; + sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); + return count; + } +#endif + if (!strcmp(name, "flowlen")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->lflow = value; + sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); + return count; + } + + if (!strcmp(name, "queue_map_min")) { + len = num_arg(&user_buffer[i], 5, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->queue_map_min = value; + sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); + return count; + } + + if (!strcmp(name, "queue_map_max")) { + len = num_arg(&user_buffer[i], 5, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->queue_map_max = value; + sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); + return count; + } + + if (!strcmp(name, "mpls")) { + unsigned int n, cnt; + + len = get_labels(&user_buffer[i], pkt_dev); + if (len < 0) + return len; + i += len; + cnt = sprintf(pg_result, "OK: mpls="); + for (n = 0; n < pkt_dev->nr_labels; n++) + cnt += sprintf(pg_result + cnt, + "%08x%s", ntohl(pkt_dev->labels[n]), + n == pkt_dev->nr_labels-1 ? "" : ","); + + if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { + pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ + pkt_dev->svlan_id = 0xffff; + + if (debug) + pr_debug("VLAN/SVLAN auto turned off\n"); + } + return count; + } + + if (!strcmp(name, "vlan_id")) { + len = num_arg(&user_buffer[i], 4, &value); + if (len < 0) + return len; + + i += len; + if (value <= 4095) { + pkt_dev->vlan_id = value; /* turn on VLAN */ + + if (debug) + pr_debug("VLAN turned on\n"); + + if (debug && pkt_dev->nr_labels) + pr_debug("MPLS auto turned off\n"); + + pkt_dev->nr_labels = 0; /* turn off MPLS */ + sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); + } else { + pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ + pkt_dev->svlan_id = 0xffff; + + if (debug) + pr_debug("VLAN/SVLAN turned off\n"); + } + return count; + } + + if (!strcmp(name, "vlan_p")) { + len = num_arg(&user_buffer[i], 1, &value); + if (len < 0) + return len; + + i += len; + if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { + pkt_dev->vlan_p = value; + sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); + } else { + sprintf(pg_result, "ERROR: vlan_p must be 0-7"); + } + return count; + } + + if (!strcmp(name, "vlan_cfi")) { + len = num_arg(&user_buffer[i], 1, &value); + if (len < 0) + return len; + + i += len; + if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { + pkt_dev->vlan_cfi = value; + sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); + } else { + sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); + } + return count; + } + + if (!strcmp(name, "svlan_id")) { + len = num_arg(&user_buffer[i], 4, &value); + if (len < 0) + return len; + + i += len; + if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { + pkt_dev->svlan_id = value; /* turn on SVLAN */ + + if (debug) + pr_debug("SVLAN turned on\n"); + + if (debug && pkt_dev->nr_labels) + pr_debug("MPLS auto turned off\n"); + + pkt_dev->nr_labels = 0; /* turn off MPLS */ + sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); + } else { + pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ + pkt_dev->svlan_id = 0xffff; + + if (debug) + pr_debug("VLAN/SVLAN turned off\n"); + } + return count; + } + + if (!strcmp(name, "svlan_p")) { + len = num_arg(&user_buffer[i], 1, &value); + if (len < 0) + return len; + + i += len; + if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { + pkt_dev->svlan_p = value; + sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); + } else { + sprintf(pg_result, "ERROR: svlan_p must be 0-7"); + } + return count; + } + + if (!strcmp(name, "svlan_cfi")) { + len = num_arg(&user_buffer[i], 1, &value); + if (len < 0) + return len; + + i += len; + if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { + pkt_dev->svlan_cfi = value; + sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); + } else { + sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); + } + return count; + } + + if (!strcmp(name, "tos")) { + __u32 tmp_value = 0; + len = hex32_arg(&user_buffer[i], 2, &tmp_value); + if (len < 0) + return len; + + i += len; + if (len == 2) { + pkt_dev->tos = tmp_value; + sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); + } else { + sprintf(pg_result, "ERROR: tos must be 00-ff"); + } + return count; + } + + if (!strcmp(name, "traffic_class")) { + __u32 tmp_value = 0; + len = hex32_arg(&user_buffer[i], 2, &tmp_value); + if (len < 0) + return len; + + i += len; + if (len == 2) { + pkt_dev->traffic_class = tmp_value; + sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); + } else { + sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); + } + return count; + } + + if (!strcmp(name, "skb_priority")) { + len = num_arg(&user_buffer[i], 9, &value); + if (len < 0) + return len; + + i += len; + pkt_dev->skb_priority = value; + sprintf(pg_result, "OK: skb_priority=%i", + pkt_dev->skb_priority); + return count; + } + + sprintf(pkt_dev->result, "No such parameter \"%s\"", name); + return -EINVAL; +} + +static int pktgen_if_open(struct inode *inode, struct file *file) +{ + return single_open(file, pktgen_if_show, PDE_DATA(inode)); +} + +static const struct proc_ops pktgen_if_proc_ops = { + .proc_open = pktgen_if_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_write = pktgen_if_write, + .proc_release = single_release, +}; + +static int pktgen_thread_show(struct seq_file *seq, void *v) +{ + struct pktgen_thread *t = seq->private; + const struct pktgen_dev *pkt_dev; + + BUG_ON(!t); + + seq_puts(seq, "Running: "); + + rcu_read_lock(); + list_for_each_entry_rcu(pkt_dev, &t->if_list, list) + if (pkt_dev->running) + seq_printf(seq, "%s ", pkt_dev->odevname); + + seq_puts(seq, "\nStopped: "); + + list_for_each_entry_rcu(pkt_dev, &t->if_list, list) + if (!pkt_dev->running) + seq_printf(seq, "%s ", pkt_dev->odevname); + + if (t->result[0]) + seq_printf(seq, "\nResult: %s\n", t->result); + else + seq_puts(seq, "\nResult: NA\n"); + + rcu_read_unlock(); + + return 0; +} + +static ssize_t pktgen_thread_write(struct file *file, + const char __user * user_buffer, + size_t count, loff_t * offset) +{ + struct seq_file *seq = file->private_data; + struct pktgen_thread *t = seq->private; + int i, max, len, ret; + char name[40]; + char *pg_result; + + if (count < 1) { + // sprintf(pg_result, "Wrong command format"); + return -EINVAL; + } + + max = count; + len = count_trail_chars(user_buffer, max); + if (len < 0) + return len; + + i = len; + + /* Read variable name */ + + len = strn_len(&user_buffer[i], sizeof(name) - 1); + if (len < 0) + return len; + + memset(name, 0, sizeof(name)); + if (copy_from_user(name, &user_buffer[i], len)) + return -EFAULT; + i += len; + + max = count - i; + len = count_trail_chars(&user_buffer[i], max); + if (len < 0) + return len; + + i += len; + + if (debug) + pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); + + if (!t) { + pr_err("ERROR: No thread\n"); + ret = -EINVAL; + goto out; + } + + pg_result = &(t->result[0]); + + if (!strcmp(name, "add_device")) { + char f[32]; + memset(f, 0, 32); + len = strn_len(&user_buffer[i], sizeof(f) - 1); + if (len < 0) { + ret = len; + goto out; + } + if (copy_from_user(f, &user_buffer[i], len)) + return -EFAULT; + i += len; + mutex_lock(&pktgen_thread_lock); + ret = pktgen_add_device(t, f); + mutex_unlock(&pktgen_thread_lock); + if (!ret) { + ret = count; + sprintf(pg_result, "OK: add_device=%s", f); + } else + sprintf(pg_result, "ERROR: can not add device %s", f); + goto out; + } + + if (!strcmp(name, "rem_device_all")) { + mutex_lock(&pktgen_thread_lock); + t->control |= T_REMDEVALL; + mutex_unlock(&pktgen_thread_lock); + schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ + ret = count; + sprintf(pg_result, "OK: rem_device_all"); + goto out; + } + + if (!strcmp(name, "max_before_softirq")) { + sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); + ret = count; + goto out; + } + + ret = -EINVAL; +out: + return ret; +} + +static int pktgen_thread_open(struct inode *inode, struct file *file) +{ + return single_open(file, pktgen_thread_show, PDE_DATA(inode)); +} + +static const struct proc_ops pktgen_thread_proc_ops = { + .proc_open = pktgen_thread_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_write = pktgen_thread_write, + .proc_release = single_release, +}; + +/* Think find or remove for NN */ +static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, + const char *ifname, int remove) +{ + struct pktgen_thread *t; + struct pktgen_dev *pkt_dev = NULL; + bool exact = (remove == FIND); + + list_for_each_entry(t, &pn->pktgen_threads, th_list) { + pkt_dev = pktgen_find_dev(t, ifname, exact); + if (pkt_dev) { + if (remove) { + pkt_dev->removal_mark = 1; + t->control |= T_REMDEV; + } + break; + } + } + return pkt_dev; +} + +/* + * mark a device for removal + */ +static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) +{ + struct pktgen_dev *pkt_dev = NULL; + const int max_tries = 10, msec_per_try = 125; + int i = 0; + + mutex_lock(&pktgen_thread_lock); + pr_debug("%s: marking %s for removal\n", __func__, ifname); + + while (1) { + + pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); + if (pkt_dev == NULL) + break; /* success */ + + mutex_unlock(&pktgen_thread_lock); + pr_debug("%s: waiting for %s to disappear....\n", + __func__, ifname); + schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); + mutex_lock(&pktgen_thread_lock); + + if (++i >= max_tries) { + pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", + __func__, msec_per_try * i, ifname); + break; + } + + } + + mutex_unlock(&pktgen_thread_lock); +} + +static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) +{ + struct pktgen_thread *t; + + mutex_lock(&pktgen_thread_lock); + + list_for_each_entry(t, &pn->pktgen_threads, th_list) { + struct pktgen_dev *pkt_dev; + + if_lock(t); + list_for_each_entry(pkt_dev, &t->if_list, list) { + if (pkt_dev->odev != dev) + continue; + + proc_remove(pkt_dev->entry); + + pkt_dev->entry = proc_create_data(dev->name, 0600, + pn->proc_dir, + &pktgen_if_proc_ops, + pkt_dev); + if (!pkt_dev->entry) + pr_err("can't move proc entry for '%s'\n", + dev->name); + break; + } + if_unlock(t); + } + mutex_unlock(&pktgen_thread_lock); +} + +static int pktgen_device_event(struct notifier_block *unused, + unsigned long event, void *ptr) +{ + struct net_device *dev = netdev_notifier_info_to_dev(ptr); + struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); + + if (pn->pktgen_exiting) + return NOTIFY_DONE; + + /* It is OK that we do not hold the group lock right now, + * as we run under the RTNL lock. + */ + + switch (event) { + case NETDEV_CHANGENAME: + pktgen_change_name(pn, dev); + break; + + case NETDEV_UNREGISTER: + pktgen_mark_device(pn, dev->name); + break; + } + + return NOTIFY_DONE; +} + +static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, + struct pktgen_dev *pkt_dev, + const char *ifname) +{ + char b[IFNAMSIZ+5]; + int i; + + for (i = 0; ifname[i] != '@'; i++) { + if (i == IFNAMSIZ) + break; + + b[i] = ifname[i]; + } + b[i] = 0; + + return dev_get_by_name(pn->net, b); +} + + +/* Associate pktgen_dev with a device. */ + +static int pktgen_setup_dev(const struct pktgen_net *pn, + struct pktgen_dev *pkt_dev, const char *ifname) +{ + struct net_device *odev; + int err; + + /* Clean old setups */ + if (pkt_dev->odev) { + dev_put(pkt_dev->odev); + pkt_dev->odev = NULL; + } + + odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); + if (!odev) { + pr_err("no such netdevice: \"%s\"\n", ifname); + return -ENODEV; + } + + if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) { + pr_err("not an ethernet or loopback device: \"%s\"\n", ifname); + err = -EINVAL; + } else if (!netif_running(odev)) { + pr_err("device is down: \"%s\"\n", ifname); + err = -ENETDOWN; + } else { + pkt_dev->odev = odev; + return 0; + } + + dev_put(odev); + return err; +} + +/* Read pkt_dev from the interface and set up internal pktgen_dev + * structure to have the right information to create/send packets + */ +static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) +{ + int ntxq; + + if (!pkt_dev->odev) { + pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); + sprintf(pkt_dev->result, + "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); + return; + } + + /* make sure that we don't pick a non-existing transmit queue */ + ntxq = pkt_dev->odev->real_num_tx_queues; + + if (ntxq <= pkt_dev->queue_map_min) { + pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", + pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, + pkt_dev->odevname); + pkt_dev->queue_map_min = (ntxq ?: 1) - 1; + } + if (pkt_dev->queue_map_max >= ntxq) { + pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", + pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, + pkt_dev->odevname); + pkt_dev->queue_map_max = (ntxq ?: 1) - 1; + } + + /* Default to the interface's mac if not explicitly set. */ + + if (is_zero_ether_addr(pkt_dev->src_mac)) + ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); + + /* Set up Dest MAC */ + ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); + + if (pkt_dev->flags & F_IPV6) { + int i, set = 0, err = 1; + struct inet6_dev *idev; + + if (pkt_dev->min_pkt_size == 0) { + pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) + + sizeof(struct udphdr) + + sizeof(struct pktgen_hdr) + + pkt_dev->pkt_overhead; + } + + for (i = 0; i < sizeof(struct in6_addr); i++) + if (pkt_dev->cur_in6_saddr.s6_addr[i]) { + set = 1; + break; + } + + if (!set) { + + /* + * Use linklevel address if unconfigured. + * + * use ipv6_get_lladdr if/when it's get exported + */ + + rcu_read_lock(); + idev = __in6_dev_get(pkt_dev->odev); + if (idev) { + struct inet6_ifaddr *ifp; + + read_lock_bh(&idev->lock); + list_for_each_entry(ifp, &idev->addr_list, if_list) { + if ((ifp->scope & IFA_LINK) && + !(ifp->flags & IFA_F_TENTATIVE)) { + pkt_dev->cur_in6_saddr = ifp->addr; + err = 0; + break; + } + } + read_unlock_bh(&idev->lock); + } + rcu_read_unlock(); + if (err) + pr_err("ERROR: IPv6 link address not available\n"); + } + } else { + if (pkt_dev->min_pkt_size == 0) { + pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) + + sizeof(struct udphdr) + + sizeof(struct pktgen_hdr) + + pkt_dev->pkt_overhead; + } + + pkt_dev->saddr_min = 0; + pkt_dev->saddr_max = 0; + if (strlen(pkt_dev->src_min) == 0) { + + struct in_device *in_dev; + + rcu_read_lock(); + in_dev = __in_dev_get_rcu(pkt_dev->odev); + if (in_dev) { + const struct in_ifaddr *ifa; + + ifa = rcu_dereference(in_dev->ifa_list); + if (ifa) { + pkt_dev->saddr_min = ifa->ifa_address; + pkt_dev->saddr_max = pkt_dev->saddr_min; + } + } + rcu_read_unlock(); + } else { + pkt_dev->saddr_min = in_aton(pkt_dev->src_min); + pkt_dev->saddr_max = in_aton(pkt_dev->src_max); + } + + pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); + pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); + } + /* Initialize current values. */ + pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; + if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) + pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; + + pkt_dev->cur_dst_mac_offset = 0; + pkt_dev->cur_src_mac_offset = 0; + pkt_dev->cur_saddr = pkt_dev->saddr_min; + pkt_dev->cur_daddr = pkt_dev->daddr_min; + pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; + pkt_dev->cur_udp_src = pkt_dev->udp_src_min; + pkt_dev->nflows = 0; +} + + +static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) +{ + ktime_t start_time, end_time; + s64 remaining; + struct hrtimer_sleeper t; + + hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + hrtimer_set_expires(&t.timer, spin_until); + + remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); + if (remaining <= 0) + goto out; + + start_time = ktime_get(); + if (remaining < 100000) { + /* for small delays (<100us), just loop until limit is reached */ + do { + end_time = ktime_get(); + } while (ktime_compare(end_time, spin_until) < 0); + } else { + do { + set_current_state(TASK_INTERRUPTIBLE); + hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS); + + if (likely(t.task)) + schedule(); + + hrtimer_cancel(&t.timer); + } while (t.task && pkt_dev->running && !signal_pending(current)); + __set_current_state(TASK_RUNNING); + end_time = ktime_get(); + } + + pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); +out: + pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); + destroy_hrtimer_on_stack(&t.timer); +} + +static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) +{ + pkt_dev->pkt_overhead = 0; + pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); + pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); + pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); +} + +static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) +{ + return !!(pkt_dev->flows[flow].flags & F_INIT); +} + +static inline int f_pick(struct pktgen_dev *pkt_dev) +{ + int flow = pkt_dev->curfl; + + if (pkt_dev->flags & F_FLOW_SEQ) { + if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { + /* reset time */ + pkt_dev->flows[flow].count = 0; + pkt_dev->flows[flow].flags = 0; + pkt_dev->curfl += 1; + if (pkt_dev->curfl >= pkt_dev->cflows) + pkt_dev->curfl = 0; /*reset */ + } + } else { + flow = prandom_u32() % pkt_dev->cflows; + pkt_dev->curfl = flow; + + if (pkt_dev->flows[flow].count > pkt_dev->lflow) { + pkt_dev->flows[flow].count = 0; + pkt_dev->flows[flow].flags = 0; + } + } + + return pkt_dev->curfl; +} + + +#ifdef CONFIG_XFRM +/* If there was already an IPSEC SA, we keep it as is, else + * we go look for it ... +*/ +#define DUMMY_MARK 0 +static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) +{ + struct xfrm_state *x = pkt_dev->flows[flow].x; + struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); + if (!x) { + + if (pkt_dev->spi) { + /* We need as quick as possible to find the right SA + * Searching with minimum criteria to archieve this. + */ + x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); + } else { + /* slow path: we dont already have xfrm_state */ + x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0, + (xfrm_address_t *)&pkt_dev->cur_daddr, + (xfrm_address_t *)&pkt_dev->cur_saddr, + AF_INET, + pkt_dev->ipsmode, + pkt_dev->ipsproto, 0); + } + if (x) { + pkt_dev->flows[flow].x = x; + set_pkt_overhead(pkt_dev); + pkt_dev->pkt_overhead += x->props.header_len; + } + + } +} +#endif +static void set_cur_queue_map(struct pktgen_dev *pkt_dev) +{ + + if (pkt_dev->flags & F_QUEUE_MAP_CPU) + pkt_dev->cur_queue_map = smp_processor_id(); + + else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { + __u16 t; + if (pkt_dev->flags & F_QUEUE_MAP_RND) { + t = prandom_u32() % + (pkt_dev->queue_map_max - + pkt_dev->queue_map_min + 1) + + pkt_dev->queue_map_min; + } else { + t = pkt_dev->cur_queue_map + 1; + if (t > pkt_dev->queue_map_max) + t = pkt_dev->queue_map_min; + } + pkt_dev->cur_queue_map = t; + } + pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; +} + +/* Increment/randomize headers according to flags and current values + * for IP src/dest, UDP src/dst port, MAC-Addr src/dst + */ +static void mod_cur_headers(struct pktgen_dev *pkt_dev) +{ + __u32 imn; + __u32 imx; + int flow = 0; + + if (pkt_dev->cflows) + flow = f_pick(pkt_dev); + + /* Deal with source MAC */ + if (pkt_dev->src_mac_count > 1) { + __u32 mc; + __u32 tmp; + + if (pkt_dev->flags & F_MACSRC_RND) + mc = prandom_u32() % pkt_dev->src_mac_count; + else { + mc = pkt_dev->cur_src_mac_offset++; + if (pkt_dev->cur_src_mac_offset >= + pkt_dev->src_mac_count) + pkt_dev->cur_src_mac_offset = 0; + } + + tmp = pkt_dev->src_mac[5] + (mc & 0xFF); + pkt_dev->hh[11] = tmp; + tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[10] = tmp; + tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[9] = tmp; + tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[8] = tmp; + tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); + pkt_dev->hh[7] = tmp; + } + + /* Deal with Destination MAC */ + if (pkt_dev->dst_mac_count > 1) { + __u32 mc; + __u32 tmp; + + if (pkt_dev->flags & F_MACDST_RND) + mc = prandom_u32() % pkt_dev->dst_mac_count; + + else { + mc = pkt_dev->cur_dst_mac_offset++; + if (pkt_dev->cur_dst_mac_offset >= + pkt_dev->dst_mac_count) { + pkt_dev->cur_dst_mac_offset = 0; + } + } + + tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); + pkt_dev->hh[5] = tmp; + tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[4] = tmp; + tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[3] = tmp; + tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[2] = tmp; + tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); + pkt_dev->hh[1] = tmp; + } + + if (pkt_dev->flags & F_MPLS_RND) { + unsigned int i; + for (i = 0; i < pkt_dev->nr_labels; i++) + if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) + pkt_dev->labels[i] = MPLS_STACK_BOTTOM | + ((__force __be32)prandom_u32() & + htonl(0x000fffff)); + } + + if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { + pkt_dev->vlan_id = prandom_u32() & (4096 - 1); + } + + if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { + pkt_dev->svlan_id = prandom_u32() & (4096 - 1); + } + + if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { + if (pkt_dev->flags & F_UDPSRC_RND) + pkt_dev->cur_udp_src = prandom_u32() % + (pkt_dev->udp_src_max - pkt_dev->udp_src_min) + + pkt_dev->udp_src_min; + + else { + pkt_dev->cur_udp_src++; + if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) + pkt_dev->cur_udp_src = pkt_dev->udp_src_min; + } + } + + if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { + if (pkt_dev->flags & F_UDPDST_RND) { + pkt_dev->cur_udp_dst = prandom_u32() % + (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) + + pkt_dev->udp_dst_min; + } else { + pkt_dev->cur_udp_dst++; + if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) + pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; + } + } + + if (!(pkt_dev->flags & F_IPV6)) { + + imn = ntohl(pkt_dev->saddr_min); + imx = ntohl(pkt_dev->saddr_max); + if (imn < imx) { + __u32 t; + if (pkt_dev->flags & F_IPSRC_RND) + t = prandom_u32() % (imx - imn) + imn; + else { + t = ntohl(pkt_dev->cur_saddr); + t++; + if (t > imx) + t = imn; + + } + pkt_dev->cur_saddr = htonl(t); + } + + if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { + pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; + } else { + imn = ntohl(pkt_dev->daddr_min); + imx = ntohl(pkt_dev->daddr_max); + if (imn < imx) { + __u32 t; + __be32 s; + if (pkt_dev->flags & F_IPDST_RND) { + + do { + t = prandom_u32() % + (imx - imn) + imn; + s = htonl(t); + } while (ipv4_is_loopback(s) || + ipv4_is_multicast(s) || + ipv4_is_lbcast(s) || + ipv4_is_zeronet(s) || + ipv4_is_local_multicast(s)); + pkt_dev->cur_daddr = s; + } else { + t = ntohl(pkt_dev->cur_daddr); + t++; + if (t > imx) { + t = imn; + } + pkt_dev->cur_daddr = htonl(t); + } + } + if (pkt_dev->cflows) { + pkt_dev->flows[flow].flags |= F_INIT; + pkt_dev->flows[flow].cur_daddr = + pkt_dev->cur_daddr; +#ifdef CONFIG_XFRM + if (pkt_dev->flags & F_IPSEC) + get_ipsec_sa(pkt_dev, flow); +#endif + pkt_dev->nflows++; + } + } + } else { /* IPV6 * */ + + if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { + int i; + + /* Only random destinations yet */ + + for (i = 0; i < 4; i++) { + pkt_dev->cur_in6_daddr.s6_addr32[i] = + (((__force __be32)prandom_u32() | + pkt_dev->min_in6_daddr.s6_addr32[i]) & + pkt_dev->max_in6_daddr.s6_addr32[i]); + } + } + } + + if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { + __u32 t; + if (pkt_dev->flags & F_TXSIZE_RND) { + t = prandom_u32() % + (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) + + pkt_dev->min_pkt_size; + } else { + t = pkt_dev->cur_pkt_size + 1; + if (t > pkt_dev->max_pkt_size) + t = pkt_dev->min_pkt_size; + } + pkt_dev->cur_pkt_size = t; + } + + set_cur_queue_map(pkt_dev); + + pkt_dev->flows[flow].count++; +} + + +#ifdef CONFIG_XFRM +static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { + + [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ +}; + +static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) +{ + struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; + int err = 0; + struct net *net = dev_net(pkt_dev->odev); + + if (!x) + return 0; + /* XXX: we dont support tunnel mode for now until + * we resolve the dst issue */ + if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) + return 0; + + /* But when user specify an valid SPI, transformation + * supports both transport/tunnel mode + ESP/AH type. + */ + if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) + skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF; + + rcu_read_lock_bh(); + err = pktgen_xfrm_outer_mode_output(x, skb); + rcu_read_unlock_bh(); + if (err) { + XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); + goto error; + } + err = x->type->output(x, skb); + if (err) { + XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); + goto error; + } + spin_lock_bh(&x->lock); + x->curlft.bytes += skb->len; + x->curlft.packets++; + spin_unlock_bh(&x->lock); +error: + return err; +} + +static void free_SAs(struct pktgen_dev *pkt_dev) +{ + if (pkt_dev->cflows) { + /* let go of the SAs if we have them */ + int i; + for (i = 0; i < pkt_dev->cflows; i++) { + struct xfrm_state *x = pkt_dev->flows[i].x; + if (x) { + xfrm_state_put(x); + pkt_dev->flows[i].x = NULL; + } + } + } +} + +static int process_ipsec(struct pktgen_dev *pkt_dev, + struct sk_buff *skb, __be16 protocol) +{ + if (pkt_dev->flags & F_IPSEC) { + struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; + int nhead = 0; + if (x) { + struct ethhdr *eth; + struct iphdr *iph; + int ret; + + nhead = x->props.header_len - skb_headroom(skb); + if (nhead > 0) { + ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); + if (ret < 0) { + pr_err("Error expanding ipsec packet %d\n", + ret); + goto err; + } + } + + /* ipsec is not expecting ll header */ + skb_pull(skb, ETH_HLEN); + ret = pktgen_output_ipsec(skb, pkt_dev); + if (ret) { + pr_err("Error creating ipsec packet %d\n", ret); + goto err; + } + /* restore ll */ + eth = skb_push(skb, ETH_HLEN); + memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN); + eth->h_proto = protocol; + + /* Update IPv4 header len as well as checksum value */ + iph = ip_hdr(skb); + iph->tot_len = htons(skb->len - ETH_HLEN); + ip_send_check(iph); + } + } + return 1; +err: + kfree_skb(skb); + return 0; +} +#endif + +static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) +{ + unsigned int i; + for (i = 0; i < pkt_dev->nr_labels; i++) + *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; + + mpls--; + *mpls |= MPLS_STACK_BOTTOM; +} + +static inline __be16 build_tci(unsigned int id, unsigned int cfi, + unsigned int prio) +{ + return htons(id | (cfi << 12) | (prio << 13)); +} + +static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, + int datalen) +{ + struct timespec64 timestamp; + struct pktgen_hdr *pgh; + + pgh = skb_put(skb, sizeof(*pgh)); + datalen -= sizeof(*pgh); + + if (pkt_dev->nfrags <= 0) { + skb_put_zero(skb, datalen); + } else { + int frags = pkt_dev->nfrags; + int i, len; + int frag_len; + + + if (frags > MAX_SKB_FRAGS) + frags = MAX_SKB_FRAGS; + len = datalen - frags * PAGE_SIZE; + if (len > 0) { + skb_put_zero(skb, len); + datalen = frags * PAGE_SIZE; + } + + i = 0; + frag_len = (datalen/frags) < PAGE_SIZE ? + (datalen/frags) : PAGE_SIZE; + while (datalen > 0) { + if (unlikely(!pkt_dev->page)) { + int node = numa_node_id(); + + if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) + node = pkt_dev->node; + pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); + if (!pkt_dev->page) + break; + } + get_page(pkt_dev->page); + skb_frag_set_page(skb, i, pkt_dev->page); + skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0); + /*last fragment, fill rest of data*/ + if (i == (frags - 1)) + skb_frag_size_set(&skb_shinfo(skb)->frags[i], + (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); + else + skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); + datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); + skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); + skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); + i++; + skb_shinfo(skb)->nr_frags = i; + } + } + + /* Stamp the time, and sequence number, + * convert them to network byte order + */ + pgh->pgh_magic = htonl(PKTGEN_MAGIC); + pgh->seq_num = htonl(pkt_dev->seq_num); + + if (pkt_dev->flags & F_NO_TIMESTAMP) { + pgh->tv_sec = 0; + pgh->tv_usec = 0; + } else { + /* + * pgh->tv_sec wraps in y2106 when interpreted as unsigned + * as done by wireshark, or y2038 when interpreted as signed. + * This is probably harmless, but if anyone wants to improve + * it, we could introduce a variant that puts 64-bit nanoseconds + * into the respective header bytes. + * This would also be slightly faster to read. + */ + ktime_get_real_ts64(×tamp); + pgh->tv_sec = htonl(timestamp.tv_sec); + pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC); + } +} + +static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, + struct pktgen_dev *pkt_dev) +{ + unsigned int extralen = LL_RESERVED_SPACE(dev); + struct sk_buff *skb = NULL; + unsigned int size; + + size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead; + if (pkt_dev->flags & F_NODE) { + int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); + + skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); + if (likely(skb)) { + skb_reserve(skb, NET_SKB_PAD); + skb->dev = dev; + } + } else { + skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); + } + + /* the caller pre-fetches from skb->data and reserves for the mac hdr */ + if (likely(skb)) + skb_reserve(skb, extralen - 16); + + return skb; +} + +static struct sk_buff *fill_packet_ipv4(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + struct sk_buff *skb = NULL; + __u8 *eth; + struct udphdr *udph; + int datalen, iplen; + struct iphdr *iph; + __be16 protocol = htons(ETH_P_IP); + __be32 *mpls; + __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ + __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ + __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ + __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ + u16 queue_map; + + if (pkt_dev->nr_labels) + protocol = htons(ETH_P_MPLS_UC); + + if (pkt_dev->vlan_id != 0xffff) + protocol = htons(ETH_P_8021Q); + + /* Update any of the values, used when we're incrementing various + * fields. + */ + mod_cur_headers(pkt_dev); + queue_map = pkt_dev->cur_queue_map; + + skb = pktgen_alloc_skb(odev, pkt_dev); + if (!skb) { + sprintf(pkt_dev->result, "No memory"); + return NULL; + } + + prefetchw(skb->data); + skb_reserve(skb, 16); + + /* Reserve for ethernet and IP header */ + eth = skb_push(skb, 14); + mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); + if (pkt_dev->nr_labels) + mpls_push(mpls, pkt_dev); + + if (pkt_dev->vlan_id != 0xffff) { + if (pkt_dev->svlan_id != 0xffff) { + svlan_tci = skb_put(skb, sizeof(__be16)); + *svlan_tci = build_tci(pkt_dev->svlan_id, + pkt_dev->svlan_cfi, + pkt_dev->svlan_p); + svlan_encapsulated_proto = skb_put(skb, + sizeof(__be16)); + *svlan_encapsulated_proto = htons(ETH_P_8021Q); + } + vlan_tci = skb_put(skb, sizeof(__be16)); + *vlan_tci = build_tci(pkt_dev->vlan_id, + pkt_dev->vlan_cfi, + pkt_dev->vlan_p); + vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); + *vlan_encapsulated_proto = htons(ETH_P_IP); + } + + skb_reset_mac_header(skb); + skb_set_network_header(skb, skb->len); + iph = skb_put(skb, sizeof(struct iphdr)); + + skb_set_transport_header(skb, skb->len); + udph = skb_put(skb, sizeof(struct udphdr)); + skb_set_queue_mapping(skb, queue_map); + skb->priority = pkt_dev->skb_priority; + + memcpy(eth, pkt_dev->hh, 12); + *(__be16 *) & eth[12] = protocol; + + /* Eth + IPh + UDPh + mpls */ + datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - + pkt_dev->pkt_overhead; + if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) + datalen = sizeof(struct pktgen_hdr); + + udph->source = htons(pkt_dev->cur_udp_src); + udph->dest = htons(pkt_dev->cur_udp_dst); + udph->len = htons(datalen + 8); /* DATA + udphdr */ + udph->check = 0; + + iph->ihl = 5; + iph->version = 4; + iph->ttl = 32; + iph->tos = pkt_dev->tos; + iph->protocol = IPPROTO_UDP; /* UDP */ + iph->saddr = pkt_dev->cur_saddr; + iph->daddr = pkt_dev->cur_daddr; + iph->id = htons(pkt_dev->ip_id); + pkt_dev->ip_id++; + iph->frag_off = 0; + iplen = 20 + 8 + datalen; + iph->tot_len = htons(iplen); + ip_send_check(iph); + skb->protocol = protocol; + skb->dev = odev; + skb->pkt_type = PACKET_HOST; + + pktgen_finalize_skb(pkt_dev, skb, datalen); + + if (!(pkt_dev->flags & F_UDPCSUM)) { + skb->ip_summed = CHECKSUM_NONE; + } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) { + skb->ip_summed = CHECKSUM_PARTIAL; + skb->csum = 0; + udp4_hwcsum(skb, iph->saddr, iph->daddr); + } else { + __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); + + /* add protocol-dependent pseudo-header */ + udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, + datalen + 8, IPPROTO_UDP, csum); + + if (udph->check == 0) + udph->check = CSUM_MANGLED_0; + } + +#ifdef CONFIG_XFRM + if (!process_ipsec(pkt_dev, skb, protocol)) + return NULL; +#endif + + return skb; +} + +static struct sk_buff *fill_packet_ipv6(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + struct sk_buff *skb = NULL; + __u8 *eth; + struct udphdr *udph; + int datalen, udplen; + struct ipv6hdr *iph; + __be16 protocol = htons(ETH_P_IPV6); + __be32 *mpls; + __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ + __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ + __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ + __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ + u16 queue_map; + + if (pkt_dev->nr_labels) + protocol = htons(ETH_P_MPLS_UC); + + if (pkt_dev->vlan_id != 0xffff) + protocol = htons(ETH_P_8021Q); + + /* Update any of the values, used when we're incrementing various + * fields. + */ + mod_cur_headers(pkt_dev); + queue_map = pkt_dev->cur_queue_map; + + skb = pktgen_alloc_skb(odev, pkt_dev); + if (!skb) { + sprintf(pkt_dev->result, "No memory"); + return NULL; + } + + prefetchw(skb->data); + skb_reserve(skb, 16); + + /* Reserve for ethernet and IP header */ + eth = skb_push(skb, 14); + mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); + if (pkt_dev->nr_labels) + mpls_push(mpls, pkt_dev); + + if (pkt_dev->vlan_id != 0xffff) { + if (pkt_dev->svlan_id != 0xffff) { + svlan_tci = skb_put(skb, sizeof(__be16)); + *svlan_tci = build_tci(pkt_dev->svlan_id, + pkt_dev->svlan_cfi, + pkt_dev->svlan_p); + svlan_encapsulated_proto = skb_put(skb, + sizeof(__be16)); + *svlan_encapsulated_proto = htons(ETH_P_8021Q); + } + vlan_tci = skb_put(skb, sizeof(__be16)); + *vlan_tci = build_tci(pkt_dev->vlan_id, + pkt_dev->vlan_cfi, + pkt_dev->vlan_p); + vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); + *vlan_encapsulated_proto = htons(ETH_P_IPV6); + } + + skb_reset_mac_header(skb); + skb_set_network_header(skb, skb->len); + iph = skb_put(skb, sizeof(struct ipv6hdr)); + + skb_set_transport_header(skb, skb->len); + udph = skb_put(skb, sizeof(struct udphdr)); + skb_set_queue_mapping(skb, queue_map); + skb->priority = pkt_dev->skb_priority; + + memcpy(eth, pkt_dev->hh, 12); + *(__be16 *) ð[12] = protocol; + + /* Eth + IPh + UDPh + mpls */ + datalen = pkt_dev->cur_pkt_size - 14 - + sizeof(struct ipv6hdr) - sizeof(struct udphdr) - + pkt_dev->pkt_overhead; + + if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { + datalen = sizeof(struct pktgen_hdr); + net_info_ratelimited("increased datalen to %d\n", datalen); + } + + udplen = datalen + sizeof(struct udphdr); + udph->source = htons(pkt_dev->cur_udp_src); + udph->dest = htons(pkt_dev->cur_udp_dst); + udph->len = htons(udplen); + udph->check = 0; + + *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ + + if (pkt_dev->traffic_class) { + /* Version + traffic class + flow (0) */ + *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); + } + + iph->hop_limit = 32; + + iph->payload_len = htons(udplen); + iph->nexthdr = IPPROTO_UDP; + + iph->daddr = pkt_dev->cur_in6_daddr; + iph->saddr = pkt_dev->cur_in6_saddr; + + skb->protocol = protocol; + skb->dev = odev; + skb->pkt_type = PACKET_HOST; + + pktgen_finalize_skb(pkt_dev, skb, datalen); + + if (!(pkt_dev->flags & F_UDPCSUM)) { + skb->ip_summed = CHECKSUM_NONE; + } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) { + skb->ip_summed = CHECKSUM_PARTIAL; + skb->csum_start = skb_transport_header(skb) - skb->head; + skb->csum_offset = offsetof(struct udphdr, check); + udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); + } else { + __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); + + /* add protocol-dependent pseudo-header */ + udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); + + if (udph->check == 0) + udph->check = CSUM_MANGLED_0; + } + + return skb; +} + +static struct sk_buff *fill_packet(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + if (pkt_dev->flags & F_IPV6) + return fill_packet_ipv6(odev, pkt_dev); + else + return fill_packet_ipv4(odev, pkt_dev); +} + +static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) +{ + pkt_dev->seq_num = 1; + pkt_dev->idle_acc = 0; + pkt_dev->sofar = 0; + pkt_dev->tx_bytes = 0; + pkt_dev->errors = 0; +} + +/* Set up structure for sending pkts, clear counters */ + +static void pktgen_run(struct pktgen_thread *t) +{ + struct pktgen_dev *pkt_dev; + int started = 0; + + func_enter(); + + rcu_read_lock(); + list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { + + /* + * setup odev and create initial packet. + */ + pktgen_setup_inject(pkt_dev); + + if (pkt_dev->odev) { + pktgen_clear_counters(pkt_dev); + pkt_dev->skb = NULL; + pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); + + set_pkt_overhead(pkt_dev); + + strcpy(pkt_dev->result, "Starting"); + pkt_dev->running = 1; /* Cranke yeself! */ + started++; + } else + strcpy(pkt_dev->result, "Error starting"); + } + rcu_read_unlock(); + if (started) + t->control &= ~(T_STOP); +} + +static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) +{ + struct pktgen_thread *t; + + func_enter(); + + mutex_lock(&pktgen_thread_lock); + + list_for_each_entry(t, &pn->pktgen_threads, th_list) + t->control |= T_STOP; + + mutex_unlock(&pktgen_thread_lock); +} + +static int thread_is_running(const struct pktgen_thread *t) +{ + const struct pktgen_dev *pkt_dev; + + rcu_read_lock(); + list_for_each_entry_rcu(pkt_dev, &t->if_list, list) + if (pkt_dev->running) { + rcu_read_unlock(); + return 1; + } + rcu_read_unlock(); + return 0; +} + +static int pktgen_wait_thread_run(struct pktgen_thread *t) +{ + while (thread_is_running(t)) { + + /* note: 't' will still be around even after the unlock/lock + * cycle because pktgen_thread threads are only cleared at + * net exit + */ + mutex_unlock(&pktgen_thread_lock); + msleep_interruptible(100); + mutex_lock(&pktgen_thread_lock); + + if (signal_pending(current)) + goto signal; + } + return 1; +signal: + return 0; +} + +static int pktgen_wait_all_threads_run(struct pktgen_net *pn) +{ + struct pktgen_thread *t; + int sig = 1; + + /* prevent from racing with rmmod */ + if (!try_module_get(THIS_MODULE)) + return sig; + + mutex_lock(&pktgen_thread_lock); + + list_for_each_entry(t, &pn->pktgen_threads, th_list) { + sig = pktgen_wait_thread_run(t); + if (sig == 0) + break; + } + + if (sig == 0) + list_for_each_entry(t, &pn->pktgen_threads, th_list) + t->control |= (T_STOP); + + mutex_unlock(&pktgen_thread_lock); + module_put(THIS_MODULE); + return sig; +} + +static void pktgen_run_all_threads(struct pktgen_net *pn) +{ + struct pktgen_thread *t; + + func_enter(); + + mutex_lock(&pktgen_thread_lock); + + list_for_each_entry(t, &pn->pktgen_threads, th_list) + t->control |= (T_RUN); + + mutex_unlock(&pktgen_thread_lock); + + /* Propagate thread->control */ + schedule_timeout_interruptible(msecs_to_jiffies(125)); + + pktgen_wait_all_threads_run(pn); +} + +static void pktgen_reset_all_threads(struct pktgen_net *pn) +{ + struct pktgen_thread *t; + + func_enter(); + + mutex_lock(&pktgen_thread_lock); + + list_for_each_entry(t, &pn->pktgen_threads, th_list) + t->control |= (T_REMDEVALL); + + mutex_unlock(&pktgen_thread_lock); + + /* Propagate thread->control */ + schedule_timeout_interruptible(msecs_to_jiffies(125)); + + pktgen_wait_all_threads_run(pn); +} + +static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) +{ + __u64 bps, mbps, pps; + char *p = pkt_dev->result; + ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, + pkt_dev->started_at); + ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); + + p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", + (unsigned long long)ktime_to_us(elapsed), + (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), + (unsigned long long)ktime_to_us(idle), + (unsigned long long)pkt_dev->sofar, + pkt_dev->cur_pkt_size, nr_frags); + + pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, + ktime_to_ns(elapsed)); + + bps = pps * 8 * pkt_dev->cur_pkt_size; + + mbps = bps; + do_div(mbps, 1000000); + p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", + (unsigned long long)pps, + (unsigned long long)mbps, + (unsigned long long)bps, + (unsigned long long)pkt_dev->errors); +} + +/* Set stopped-at timer, remove from running list, do counters & statistics */ +static int pktgen_stop_device(struct pktgen_dev *pkt_dev) +{ + int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; + + if (!pkt_dev->running) { + pr_warn("interface: %s is already stopped\n", + pkt_dev->odevname); + return -EINVAL; + } + + pkt_dev->running = 0; + kfree_skb(pkt_dev->skb); + pkt_dev->skb = NULL; + pkt_dev->stopped_at = ktime_get(); + + show_results(pkt_dev, nr_frags); + + return 0; +} + +static struct pktgen_dev *next_to_run(struct pktgen_thread *t) +{ + struct pktgen_dev *pkt_dev, *best = NULL; + + rcu_read_lock(); + list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { + if (!pkt_dev->running) + continue; + if (best == NULL) + best = pkt_dev; + else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) + best = pkt_dev; + } + rcu_read_unlock(); + + return best; +} + +static void pktgen_stop(struct pktgen_thread *t) +{ + struct pktgen_dev *pkt_dev; + + func_enter(); + + rcu_read_lock(); + + list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { + pktgen_stop_device(pkt_dev); + } + + rcu_read_unlock(); +} + +/* + * one of our devices needs to be removed - find it + * and remove it + */ +static void pktgen_rem_one_if(struct pktgen_thread *t) +{ + struct list_head *q, *n; + struct pktgen_dev *cur; + + func_enter(); + + list_for_each_safe(q, n, &t->if_list) { + cur = list_entry(q, struct pktgen_dev, list); + + if (!cur->removal_mark) + continue; + + kfree_skb(cur->skb); + cur->skb = NULL; + + pktgen_remove_device(t, cur); + + break; + } +} + +static void pktgen_rem_all_ifs(struct pktgen_thread *t) +{ + struct list_head *q, *n; + struct pktgen_dev *cur; + + func_enter(); + + /* Remove all devices, free mem */ + + list_for_each_safe(q, n, &t->if_list) { + cur = list_entry(q, struct pktgen_dev, list); + + kfree_skb(cur->skb); + cur->skb = NULL; + + pktgen_remove_device(t, cur); + } +} + +static void pktgen_rem_thread(struct pktgen_thread *t) +{ + /* Remove from the thread list */ + remove_proc_entry(t->tsk->comm, t->net->proc_dir); +} + +static void pktgen_resched(struct pktgen_dev *pkt_dev) +{ + ktime_t idle_start = ktime_get(); + schedule(); + pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); +} + +static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) +{ + ktime_t idle_start = ktime_get(); + + while (refcount_read(&(pkt_dev->skb->users)) != 1) { + if (signal_pending(current)) + break; + + if (need_resched()) + pktgen_resched(pkt_dev); + else + cpu_relax(); + } + pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); +} + +static void pktgen_xmit(struct pktgen_dev *pkt_dev) +{ + unsigned int burst = READ_ONCE(pkt_dev->burst); + struct net_device *odev = pkt_dev->odev; + struct netdev_queue *txq; + struct sk_buff *skb; + int ret; + + /* If device is offline, then don't send */ + if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { + pktgen_stop_device(pkt_dev); + return; + } + + /* This is max DELAY, this has special meaning of + * "never transmit" + */ + if (unlikely(pkt_dev->delay == ULLONG_MAX)) { + pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); + return; + } + + /* If no skb or clone count exhausted then get new one */ + if (!pkt_dev->skb || (pkt_dev->last_ok && + ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { + /* build a new pkt */ + kfree_skb(pkt_dev->skb); + + pkt_dev->skb = fill_packet(odev, pkt_dev); + if (pkt_dev->skb == NULL) { + pr_err("ERROR: couldn't allocate skb in fill_packet\n"); + schedule(); + pkt_dev->clone_count--; /* back out increment, OOM */ + return; + } + pkt_dev->last_pkt_size = pkt_dev->skb->len; + pkt_dev->clone_count = 0; /* reset counter */ + } + + if (pkt_dev->delay && pkt_dev->last_ok) + spin(pkt_dev, pkt_dev->next_tx); + + if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) { + skb = pkt_dev->skb; + skb->protocol = eth_type_trans(skb, skb->dev); + refcount_add(burst, &skb->users); + local_bh_disable(); + do { + ret = netif_receive_skb(skb); + if (ret == NET_RX_DROP) + pkt_dev->errors++; + pkt_dev->sofar++; + pkt_dev->seq_num++; + if (refcount_read(&skb->users) != burst) { + /* skb was queued by rps/rfs or taps, + * so cannot reuse this skb + */ + WARN_ON(refcount_sub_and_test(burst - 1, &skb->users)); + /* get out of the loop and wait + * until skb is consumed + */ + break; + } + /* skb was 'freed' by stack, so clean few + * bits and reuse it + */ + skb_reset_redirect(skb); + } while (--burst > 0); + goto out; /* Skips xmit_mode M_START_XMIT */ + } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) { + local_bh_disable(); + refcount_inc(&pkt_dev->skb->users); + + ret = dev_queue_xmit(pkt_dev->skb); + switch (ret) { + case NET_XMIT_SUCCESS: + pkt_dev->sofar++; + pkt_dev->seq_num++; + pkt_dev->tx_bytes += pkt_dev->last_pkt_size; + break; + case NET_XMIT_DROP: + case NET_XMIT_CN: + /* These are all valid return codes for a qdisc but + * indicate packets are being dropped or will likely + * be dropped soon. + */ + case NETDEV_TX_BUSY: + /* qdisc may call dev_hard_start_xmit directly in cases + * where no queues exist e.g. loopback device, virtual + * devices, etc. In this case we need to handle + * NETDEV_TX_ codes. + */ + default: + pkt_dev->errors++; + net_info_ratelimited("%s xmit error: %d\n", + pkt_dev->odevname, ret); + break; + } + goto out; + } + + txq = skb_get_tx_queue(odev, pkt_dev->skb); + + local_bh_disable(); + + HARD_TX_LOCK(odev, txq, smp_processor_id()); + + if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { + pkt_dev->last_ok = 0; + goto unlock; + } + refcount_add(burst, &pkt_dev->skb->users); + +xmit_more: + ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); + + switch (ret) { + case NETDEV_TX_OK: + pkt_dev->last_ok = 1; + pkt_dev->sofar++; + pkt_dev->seq_num++; + pkt_dev->tx_bytes += pkt_dev->last_pkt_size; + if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) + goto xmit_more; + break; + case NET_XMIT_DROP: + case NET_XMIT_CN: + /* skb has been consumed */ + pkt_dev->errors++; + break; + default: /* Drivers are not supposed to return other values! */ + net_info_ratelimited("%s xmit error: %d\n", + pkt_dev->odevname, ret); + pkt_dev->errors++; + fallthrough; + case NETDEV_TX_BUSY: + /* Retry it next time */ + refcount_dec(&(pkt_dev->skb->users)); + pkt_dev->last_ok = 0; + } + if (unlikely(burst)) + WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users)); +unlock: + HARD_TX_UNLOCK(odev, txq); + +out: + local_bh_enable(); + + /* If pkt_dev->count is zero, then run forever */ + if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { + pktgen_wait_for_skb(pkt_dev); + + /* Done with this */ + pktgen_stop_device(pkt_dev); + } +} + +/* + * Main loop of the thread goes here + */ + +static int pktgen_thread_worker(void *arg) +{ + DEFINE_WAIT(wait); + struct pktgen_thread *t = arg; + struct pktgen_dev *pkt_dev = NULL; + int cpu = t->cpu; + + WARN_ON(smp_processor_id() != cpu); + + init_waitqueue_head(&t->queue); + complete(&t->start_done); + + pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); + + set_freezable(); + + while (!kthread_should_stop()) { + pkt_dev = next_to_run(t); + + if (unlikely(!pkt_dev && t->control == 0)) { + if (t->net->pktgen_exiting) + break; + wait_event_interruptible_timeout(t->queue, + t->control != 0, + HZ/10); + try_to_freeze(); + continue; + } + + if (likely(pkt_dev)) { + pktgen_xmit(pkt_dev); + + if (need_resched()) + pktgen_resched(pkt_dev); + else + cpu_relax(); + } + + if (t->control & T_STOP) { + pktgen_stop(t); + t->control &= ~(T_STOP); + } + + if (t->control & T_RUN) { + pktgen_run(t); + t->control &= ~(T_RUN); + } + + if (t->control & T_REMDEVALL) { + pktgen_rem_all_ifs(t); + t->control &= ~(T_REMDEVALL); + } + + if (t->control & T_REMDEV) { + pktgen_rem_one_if(t); + t->control &= ~(T_REMDEV); + } + + try_to_freeze(); + } + + pr_debug("%s stopping all device\n", t->tsk->comm); + pktgen_stop(t); + + pr_debug("%s removing all device\n", t->tsk->comm); + pktgen_rem_all_ifs(t); + + pr_debug("%s removing thread\n", t->tsk->comm); + pktgen_rem_thread(t); + + return 0; +} + +static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, + const char *ifname, bool exact) +{ + struct pktgen_dev *p, *pkt_dev = NULL; + size_t len = strlen(ifname); + + rcu_read_lock(); + list_for_each_entry_rcu(p, &t->if_list, list) + if (strncmp(p->odevname, ifname, len) == 0) { + if (p->odevname[len]) { + if (exact || p->odevname[len] != '@') + continue; + } + pkt_dev = p; + break; + } + + rcu_read_unlock(); + pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); + return pkt_dev; +} + +/* + * Adds a dev at front of if_list. + */ + +static int add_dev_to_thread(struct pktgen_thread *t, + struct pktgen_dev *pkt_dev) +{ + int rv = 0; + + /* This function cannot be called concurrently, as its called + * under pktgen_thread_lock mutex, but it can run from + * userspace on another CPU than the kthread. The if_lock() + * is used here to sync with concurrent instances of + * _rem_dev_from_if_list() invoked via kthread, which is also + * updating the if_list */ + if_lock(t); + + if (pkt_dev->pg_thread) { + pr_err("ERROR: already assigned to a thread\n"); + rv = -EBUSY; + goto out; + } + + pkt_dev->running = 0; + pkt_dev->pg_thread = t; + list_add_rcu(&pkt_dev->list, &t->if_list); + +out: + if_unlock(t); + return rv; +} + +/* Called under thread lock */ + +static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) +{ + struct pktgen_dev *pkt_dev; + int err; + int node = cpu_to_node(t->cpu); + + /* We don't allow a device to be on several threads */ + + pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); + if (pkt_dev) { + pr_err("ERROR: interface already used\n"); + return -EBUSY; + } + + pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); + if (!pkt_dev) + return -ENOMEM; + + strcpy(pkt_dev->odevname, ifname); + pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS, + sizeof(struct flow_state)), + node); + if (pkt_dev->flows == NULL) { + kfree(pkt_dev); + return -ENOMEM; + } + + pkt_dev->removal_mark = 0; + pkt_dev->nfrags = 0; + pkt_dev->delay = pg_delay_d; + pkt_dev->count = pg_count_d; + pkt_dev->sofar = 0; + pkt_dev->udp_src_min = 9; /* sink port */ + pkt_dev->udp_src_max = 9; + pkt_dev->udp_dst_min = 9; + pkt_dev->udp_dst_max = 9; + pkt_dev->vlan_p = 0; + pkt_dev->vlan_cfi = 0; + pkt_dev->vlan_id = 0xffff; + pkt_dev->svlan_p = 0; + pkt_dev->svlan_cfi = 0; + pkt_dev->svlan_id = 0xffff; + pkt_dev->burst = 1; + pkt_dev->node = NUMA_NO_NODE; + + err = pktgen_setup_dev(t->net, pkt_dev, ifname); + if (err) + goto out1; + if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) + pkt_dev->clone_skb = pg_clone_skb_d; + + pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, + &pktgen_if_proc_ops, pkt_dev); + if (!pkt_dev->entry) { + pr_err("cannot create %s/%s procfs entry\n", + PG_PROC_DIR, ifname); + err = -EINVAL; + goto out2; + } +#ifdef CONFIG_XFRM + pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; + pkt_dev->ipsproto = IPPROTO_ESP; + + /* xfrm tunnel mode needs additional dst to extract outter + * ip header protocol/ttl/id field, here creat a phony one. + * instead of looking for a valid rt, which definitely hurting + * performance under such circumstance. + */ + pkt_dev->dstops.family = AF_INET; + pkt_dev->xdst.u.dst.dev = pkt_dev->odev; + dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false); + pkt_dev->xdst.child = &pkt_dev->xdst.u.dst; + pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops; +#endif + + return add_dev_to_thread(t, pkt_dev); +out2: + dev_put(pkt_dev->odev); +out1: +#ifdef CONFIG_XFRM + free_SAs(pkt_dev); +#endif + vfree(pkt_dev->flows); + kfree(pkt_dev); + return err; +} + +static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) +{ + struct pktgen_thread *t; + struct proc_dir_entry *pe; + struct task_struct *p; + + t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, + cpu_to_node(cpu)); + if (!t) { + pr_err("ERROR: out of memory, can't create new thread\n"); + return -ENOMEM; + } + + mutex_init(&t->if_lock); + t->cpu = cpu; + + INIT_LIST_HEAD(&t->if_list); + + list_add_tail(&t->th_list, &pn->pktgen_threads); + init_completion(&t->start_done); + + p = kthread_create_on_node(pktgen_thread_worker, + t, + cpu_to_node(cpu), + "kpktgend_%d", cpu); + if (IS_ERR(p)) { + pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu); + list_del(&t->th_list); + kfree(t); + return PTR_ERR(p); + } + kthread_bind(p, cpu); + t->tsk = p; + + pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, + &pktgen_thread_proc_ops, t); + if (!pe) { + pr_err("cannot create %s/%s procfs entry\n", + PG_PROC_DIR, t->tsk->comm); + kthread_stop(p); + list_del(&t->th_list); + kfree(t); + return -EINVAL; + } + + t->net = pn; + get_task_struct(p); + wake_up_process(p); + wait_for_completion(&t->start_done); + + return 0; +} + +/* + * Removes a device from the thread if_list. + */ +static void _rem_dev_from_if_list(struct pktgen_thread *t, + struct pktgen_dev *pkt_dev) +{ + struct list_head *q, *n; + struct pktgen_dev *p; + + if_lock(t); + list_for_each_safe(q, n, &t->if_list) { + p = list_entry(q, struct pktgen_dev, list); + if (p == pkt_dev) + list_del_rcu(&p->list); + } + if_unlock(t); +} + +static int pktgen_remove_device(struct pktgen_thread *t, + struct pktgen_dev *pkt_dev) +{ + pr_debug("remove_device pkt_dev=%p\n", pkt_dev); + + if (pkt_dev->running) { + pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); + pktgen_stop_device(pkt_dev); + } + + /* Dis-associate from the interface */ + + if (pkt_dev->odev) { + dev_put(pkt_dev->odev); + pkt_dev->odev = NULL; + } + + /* Remove proc before if_list entry, because add_device uses + * list to determine if interface already exist, avoid race + * with proc_create_data() */ + proc_remove(pkt_dev->entry); + + /* And update the thread if_list */ + _rem_dev_from_if_list(t, pkt_dev); + +#ifdef CONFIG_XFRM + free_SAs(pkt_dev); +#endif + vfree(pkt_dev->flows); + if (pkt_dev->page) + put_page(pkt_dev->page); + kfree_rcu(pkt_dev, rcu); + return 0; +} + +static int __net_init pg_net_init(struct net *net) +{ + struct pktgen_net *pn = net_generic(net, pg_net_id); + struct proc_dir_entry *pe; + int cpu, ret = 0; + + pn->net = net; + INIT_LIST_HEAD(&pn->pktgen_threads); + pn->pktgen_exiting = false; + pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); + if (!pn->proc_dir) { + pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); + return -ENODEV; + } + pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops); + if (pe == NULL) { + pr_err("cannot create %s procfs entry\n", PGCTRL); + ret = -EINVAL; + goto remove; + } + + for_each_online_cpu(cpu) { + int err; + + err = pktgen_create_thread(cpu, pn); + if (err) + pr_warn("Cannot create thread for cpu %d (%d)\n", + cpu, err); + } + + if (list_empty(&pn->pktgen_threads)) { + pr_err("Initialization failed for all threads\n"); + ret = -ENODEV; + goto remove_entry; + } + + return 0; + +remove_entry: + remove_proc_entry(PGCTRL, pn->proc_dir); +remove: + remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); + return ret; +} + +static void __net_exit pg_net_exit(struct net *net) +{ + struct pktgen_net *pn = net_generic(net, pg_net_id); + struct pktgen_thread *t; + struct list_head *q, *n; + LIST_HEAD(list); + + /* Stop all interfaces & threads */ + pn->pktgen_exiting = true; + + mutex_lock(&pktgen_thread_lock); + list_splice_init(&pn->pktgen_threads, &list); + mutex_unlock(&pktgen_thread_lock); + + list_for_each_safe(q, n, &list) { + t = list_entry(q, struct pktgen_thread, th_list); + list_del(&t->th_list); + kthread_stop(t->tsk); + put_task_struct(t->tsk); + kfree(t); + } + + remove_proc_entry(PGCTRL, pn->proc_dir); + remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); +} + +static struct pernet_operations pg_net_ops = { + .init = pg_net_init, + .exit = pg_net_exit, + .id = &pg_net_id, + .size = sizeof(struct pktgen_net), +}; + +static int __init pg_init(void) +{ + int ret = 0; + + pr_info("%s", version); + ret = register_pernet_subsys(&pg_net_ops); + if (ret) + return ret; + ret = register_netdevice_notifier(&pktgen_notifier_block); + if (ret) + unregister_pernet_subsys(&pg_net_ops); + + return ret; +} + +static void __exit pg_cleanup(void) +{ + unregister_netdevice_notifier(&pktgen_notifier_block); + unregister_pernet_subsys(&pg_net_ops); + /* Don't need rcu_barrier() due to use of kfree_rcu() */ +} + +module_init(pg_init); +module_exit(pg_cleanup); + +MODULE_AUTHOR("Robert Olsson <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"); |