| // 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.txt for how to use this. |
| * |
| * The new operation: |
| * For each CPU one thread/process is created at start. This process checks |
| * for running devices in the if_list and sends packets until count is 0 it |
| * also the thread checks the thread->control which is used for inter-process |
| * communication. controlling process "posts" operations to the threads this |
| * way. |
| * The if_list is RCU protected, and the if_lock remains to protect updating |
| * of if_list, from "add_device" as it invoked from userspace (via proc write). |
| * |
| * By design there should only be *one* "controlling" process. In practice |
| * multiple write accesses gives unpredictable result. Understood by "write" |
| * to /proc gives result code thats should be read be the "writer". |
| * For practical use this should be no problem. |
| * |
| * Note when adding devices to a specific CPU there good idea to also assign |
| * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. |
| * --ro |
| * |
| * Fix refcount off by one if first packet fails, potential null deref, |
| * memleak 030710- KJP |
| * |
| * First "ranges" functionality for ipv6 030726 --ro |
| * |
| * Included flow support. 030802 ANK. |
| * |
| * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> |
| * |
| * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 |
| * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 |
| * |
| * New xmit() return, do_div and misc clean up by Stephen Hemminger |
| * <shemminger@osdl.org> 040923 |
| * |
| * Randy Dunlap fixed u64 printk compiler warning |
| * |
| * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> |
| * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 |
| * |
| * Corrections from Nikolai Malykh (nmalykh@bilim.com) |
| * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 |
| * |
| * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> |
| * 050103 |
| * |
| * MPLS support by Steven Whitehouse <steve@chygwyn.com> |
| * |
| * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> |
| * |
| * Fixed src_mac command to set source mac of packet to value specified in |
| * command by Adit Ranadive <adit.262@gmail.com> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/sys.h> |
| #include <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/kernel.h> |
| #include <linux/mutex.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/vmalloc.h> |
| #include <linux/unistd.h> |
| #include <linux/string.h> |
| #include <linux/ptrace.h> |
| #include <linux/errno.h> |
| #include <linux/ioport.h> |
| #include <linux/interrupt.h> |
| #include <linux/capability.h> |
| #include <linux/hrtimer.h> |
| #include <linux/freezer.h> |
| #include <linux/delay.h> |
| #include <linux/timer.h> |
| #include <linux/list.h> |
| #include <linux/init.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/inet.h> |
| #include <linux/inetdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_vlan.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <linux/udp.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/wait.h> |
| #include <linux/etherdevice.h> |
| #include <linux/kthread.h> |
| #include <linux/prefetch.h> |
| #include <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 file_operations pktgen_fops = { |
| .open = pgctrl_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .write = pgctrl_write, |
| .release = single_release, |
| }; |
| |
| static int pktgen_if_show(struct seq_file *seq, void *v) |
| { |
| const struct pktgen_dev *pkt_dev = seq->private; |
| ktime_t stopped; |
| unsigned int i; |
| u64 idle; |
| |
| seq_printf(seq, |
| "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", |
| (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, |
| pkt_dev->max_pkt_size); |
| |
| seq_printf(seq, |
| " frags: %d delay: %llu clone_skb: %d ifname: %s\n", |
| pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, |
| pkt_dev->clone_skb, pkt_dev->odevname); |
| |
| seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, |
| pkt_dev->lflow); |
| |
| seq_printf(seq, |
| " queue_map_min: %u queue_map_max: %u\n", |
| pkt_dev->queue_map_min, |
| pkt_dev->queue_map_max); |
| |
| if (pkt_dev->skb_priority) |
| seq_printf(seq, " skb_priority: %u\n", |
| pkt_dev->skb_priority); |
| |
| if (pkt_dev->flags & F_IPV6) { |
| seq_printf(seq, |
| " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" |
| " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", |
| &pkt_dev->in6_saddr, |
| &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, |
| &pkt_dev->in6_daddr, |
| &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); |
| } else { |
| seq_printf(seq, |
| " dst_min: %s dst_max: %s\n", |
| pkt_dev->dst_min, pkt_dev->dst_max); |
| seq_printf(seq, |
| " src_min: %s src_max: %s\n", |
| pkt_dev->src_min, pkt_dev->src_max); |
| } |
| |
| seq_puts(seq, " src_mac: "); |
| |
| seq_printf(seq, "%pM ", |
| is_zero_ether_addr(pkt_dev->src_mac) ? |
| pkt_dev->odev->dev_addr : pkt_dev->src_mac); |
| |
| seq_puts(seq, "dst_mac: "); |
| seq_printf(seq, "%pM\n", pkt_dev->dst_mac); |
| |
| seq_printf(seq, |
| " udp_src_min: %d udp_src_max: %d" |
| " udp_dst_min: %d udp_dst_max: %d\n", |
| pkt_dev->udp_src_min, pkt_dev->udp_src_max, |
| pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); |
| |
| seq_printf(seq, |
| " src_mac_count: %d dst_mac_count: %d\n", |
| pkt_dev->src_mac_count, pkt_dev->dst_mac_count); |
| |
| if (pkt_dev->nr_labels) { |
| seq_puts(seq, " mpls: "); |
| for (i = 0; i < pkt_dev->nr_labels; i++) |
| seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), |
| i == pkt_dev->nr_labels-1 ? "\n" : ", "); |
| } |
| |
| if (pkt_dev->vlan_id != 0xffff) |
| seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", |
| pkt_dev->vlan_id, pkt_dev->vlan_p, |
| pkt_dev->vlan_cfi); |
| |
| if (pkt_dev->svlan_id != 0xffff) |
| seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", |
| pkt_dev->svlan_id, pkt_dev->svlan_p, |
| pkt_dev->svlan_cfi); |
| |
| if (pkt_dev->tos) |
| seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); |
| |
| if (pkt_dev->traffic_class) |
| seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); |
| |
| if (pkt_dev->burst > 1) |
| seq_printf(seq, " burst: %d\n", pkt_dev->burst); |
| |
| if (pkt_dev->node >= 0) |
| seq_printf(seq, " node: %d\n", pkt_dev->node); |
| |
| if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) |
| seq_puts(seq, " xmit_mode: netif_receive\n"); |
| else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) |
| seq_puts(seq, " xmit_mode: xmit_queue\n"); |
| |
| seq_puts(seq, " Flags: "); |
| |
| for (i = 0; i < NR_PKT_FLAGS; i++) { |
| if (i == F_FLOW_SEQ) |
| if (!pkt_dev->cflows) |
| continue; |
| |
| if (pkt_dev->flags & (1 << i)) |
| seq_printf(seq, "%s ", pkt_flag_names[i]); |
| else if (i == F_FLOW_SEQ) |
| seq_puts(seq, "FLOW_RND "); |
| |
| #ifdef CONFIG_XFRM |
| if (i == F_IPSEC && pkt_dev->spi) |
| seq_printf(seq, "spi:%u", pkt_dev->spi); |
| #endif |
| } |
| |
| seq_puts(seq, "\n"); |
| |
| /* not really stopped, more like last-running-at */ |
| stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; |
| idle = pkt_dev->idle_acc; |
| do_div(idle, NSEC_PER_USEC); |
| |
| seq_printf(seq, |
| "Current:\n pkts-sofar: %llu errors: %llu\n", |
| (unsigned long long)pkt_dev->sofar, |
| (unsigned long long)pkt_dev->errors); |
| |
| seq_printf(seq, |
| " started: %lluus stopped: %lluus idle: %lluus\n", |
| (unsigned long long) ktime_to_us(pkt_dev->started_at), |
| (unsigned long long) ktime_to_us(stopped), |
| (unsigned long long) idle); |
| |
| seq_printf(seq, |
| " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", |
| pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, |
| pkt_dev->cur_src_mac_offset); |
| |
| if (pkt_dev->flags & F_IPV6) { |
| seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", |
| &pkt_dev->cur_in6_saddr, |
| &pkt_dev->cur_in6_daddr); |
| } else |
| seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", |
| &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); |
| |
| seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", |
| pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); |
| |
| seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); |
| |
| seq_printf(seq, " flows: %u\n", pkt_dev->nflows); |
| |
| if (pkt_dev->result[0]) |
| seq_printf(seq, "Result: %s\n", pkt_dev->result); |
| else |
| seq_puts(seq, "Result: Idle\n"); |
| |
| return 0; |
| } |
| |
| |
| static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, |
| __u32 *num) |
| { |
| int i = 0; |
| *num = 0; |
| |
| for (; i < maxlen; i++) { |
| int value; |
| char c; |
| *num <<= 4; |
| if (get_user(c, &user_buffer[i])) |
| return -EFAULT; |
| value = hex_to_bin(c); |
| if (value >= 0) |
| *num |= value; |
| else |
| break; |
| } |
| return i; |
| } |
| |
| static int count_trail_chars(const char __user * user_buffer, |
| unsigned int maxlen) |
| { |
| int i; |
| |
| for (i = 0; i < maxlen; i++) { |
| char c; |
| if (get_user(c, &user_buffer[i])) |
| return -EFAULT; |
| switch (c) { |
| case '\"': |
| case '\n': |
| case '\r': |
| case '\t': |
| case ' ': |
| case '=': |
| break; |
| default: |
| goto done; |
| } |
| } |
| done: |
| return i; |
| } |
| |
| static long num_arg(const char __user *user_buffer, unsigned long maxlen, |
| unsigned long *num) |
| { |
| int i; |
| *num = 0; |
| |
| for (i = 0; i < maxlen; i++) { |
| char c; |
| if (get_user(c, &user_buffer[i])) |
| return -EFAULT; |
| if ((c >= '0') && (c <= '9')) { |
| *num *= 10; |
| *num += c - '0'; |
| } else |
| break; |
| } |
| return i; |
| } |
| |
| static int strn_len(const char __user * user_buffer, unsigned int maxlen) |
| { |
| int i; |
| |
| for (i = 0; i < maxlen; i++) { |
| char c; |
| if (get_user(c, &user_buffer[i])) |
| return -EFAULT; |
| switch (c) { |
| case '\"': |
| case '\n': |
| case '\r': |
| case '\t': |
| case ' ': |
| goto done_str; |
| default: |
| break; |
| } |
| } |
| done_str: |
| return i; |
| } |
| |
| static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) |
| { |
| unsigned int n = 0; |
| char c; |
| ssize_t i = 0; |
| int len; |
| |
| pkt_dev->nr_labels = 0; |
| do { |
| __u32 tmp; |
| len = hex32_arg(&buffer[i], 8, &tmp); |
| if (len <= 0) |
| return len; |
| pkt_dev->labels[n] = htonl(tmp); |
| if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) |
| pkt_dev->flags |= F_MPLS_RND; |
| i += len; |
| if (get_user(c, &buffer[i])) |
| return -EFAULT; |
| i++; |
| n++; |
| if (n >= MAX_MPLS_LABELS) |
| return -E2BIG; |
| } while (c == ','); |
| |
| pkt_dev->nr_labels = n; |
| return i; |
| } |
| |
| static __u32 pktgen_read_flag(const char *f, bool *disable) |
| { |
| __u32 i; |
| |
| if (f[0] == '!') { |
| *disable = true; |
| f++; |
| } |
| |
| for (i = 0; i < NR_PKT_FLAGS; i++) { |
| if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT) |
| continue; |
| |
| /* allow only disabling ipv6 flag */ |
| if (!*disable && i == IPV6_SHIFT) |
| continue; |
| |
| if (strcmp(f, pkt_flag_names[i]) == 0) |
| return 1 << i; |
| } |
| |
| if (strcmp(f, "FLOW_RND") == 0) { |
| *disable = !*disable; |
| return F_FLOW_SEQ; |
| } |
| |
| return 0; |
| } |
| |
| static ssize_t pktgen_if_write(struct file *file, |
| const char __user * user_buffer, size_t count, |
| loff_t * offset) |
| { |
| struct seq_file *seq = file->private_data; |
| struct pktgen_dev *pkt_dev = seq->private; |
| int i, max, len; |
| char name[16], valstr[32]; |
| unsigned long value = 0; |
| char *pg_result = NULL; |
| int tmp = 0; |
| char buf[128]; |
| |
| pg_result = &(pkt_dev->result[0]); |
| |
| if (count < 1) { |
| pr_warn("wrong command format\n"); |
| return -EINVAL; |
| } |
| |
| max = count; |
| tmp = count_trail_chars(user_buffer, max); |
| if (tmp < 0) { |
| pr_warn("illegal format\n"); |
| return tmp; |
| } |
| i = tmp; |
| |
| /* Read variable name */ |
| |
| len = strn_len(&user_buffer[i], sizeof(name) - 1); |
| if (len < 0) |
| return len; |
| |
| memset(name, 0, sizeof(name)); |
| if (copy_from_user(name, &user_buffer[i], len)) |
| return -EFAULT; |
| i += len; |
| |
| max = count - i; |
| len = count_trail_chars(&user_buffer[i], max); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| |
| if (debug) { |
| size_t copy = min_t(size_t, count + 1, 1024); |
| char *tp = strndup_user(user_buffer, copy); |
| |
| if (IS_ERR(tp)) |
| return PTR_ERR(tp); |
| |
| pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp); |
| kfree(tp); |
| } |
| |
| if (!strcmp(name, "min_pkt_size")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value < 14 + 20 + 8) |
| value = 14 + 20 + 8; |
| if (value != pkt_dev->min_pkt_size) { |
| pkt_dev->min_pkt_size = value; |
| pkt_dev->cur_pkt_size = value; |
| } |
| sprintf(pg_result, "OK: min_pkt_size=%u", |
| pkt_dev->min_pkt_size); |
| return count; |
| } |
| |
| if (!strcmp(name, "max_pkt_size")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value < 14 + 20 + 8) |
| value = 14 + 20 + 8; |
| if (value != pkt_dev->max_pkt_size) { |
| pkt_dev->max_pkt_size = value; |
| pkt_dev->cur_pkt_size = value; |
| } |
| sprintf(pg_result, "OK: max_pkt_size=%u", |
| pkt_dev->max_pkt_size); |
| return count; |
| } |
| |
| /* Shortcut for min = max */ |
| |
| if (!strcmp(name, "pkt_size")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value < 14 + 20 + 8) |
| value = 14 + 20 + 8; |
| if (value != pkt_dev->min_pkt_size) { |
| pkt_dev->min_pkt_size = value; |
| pkt_dev->max_pkt_size = value; |
| pkt_dev->cur_pkt_size = value; |
| } |
| sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); |
| return count; |
| } |
| |
| if (!strcmp(name, "debug")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| debug = value; |
| sprintf(pg_result, "OK: debug=%u", debug); |
| return count; |
| } |
| |
| if (!strcmp(name, "frags")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| pkt_dev->nfrags = value; |
| sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); |
| return count; |
| } |
| if (!strcmp(name, "delay")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value == 0x7FFFFFFF) |
| pkt_dev->delay = ULLONG_MAX; |
| else |
| pkt_dev->delay = (u64)value; |
| |
| sprintf(pg_result, "OK: delay=%llu", |
| (unsigned long long) pkt_dev->delay); |
| return count; |
| } |
| if (!strcmp(name, "rate")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (!value) |
| return len; |
| pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; |
| if (debug) |
| pr_info("Delay set at: %llu ns\n", pkt_dev->delay); |
| |
| sprintf(pg_result, "OK: rate=%lu", value); |
| return count; |
| } |
| if (!strcmp(name, "ratep")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (!value) |
| return len; |
| pkt_dev->delay = NSEC_PER_SEC/value; |
| if (debug) |
| pr_info("Delay set at: %llu ns\n", pkt_dev->delay); |
| |
| sprintf(pg_result, "OK: rate=%lu", value); |
| return count; |
| } |
| if (!strcmp(name, "udp_src_min")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value != pkt_dev->udp_src_min) { |
| pkt_dev->udp_src_min = value; |
| pkt_dev->cur_udp_src = value; |
| } |
| sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); |
| return count; |
| } |
| if (!strcmp(name, "udp_dst_min")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value != pkt_dev->udp_dst_min) { |
| pkt_dev->udp_dst_min = value; |
| pkt_dev->cur_udp_dst = value; |
| } |
| sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); |
| return count; |
| } |
| if (!strcmp(name, "udp_src_max")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value != pkt_dev->udp_src_max) { |
| pkt_dev->udp_src_max = value; |
| pkt_dev->cur_udp_src = value; |
| } |
| sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); |
| return count; |
| } |
| if (!strcmp(name, "udp_dst_max")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| if (value != pkt_dev->udp_dst_max) { |
| pkt_dev->udp_dst_max = value; |
| pkt_dev->cur_udp_dst = value; |
| } |
| sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); |
| return count; |
| } |
| if (!strcmp(name, "clone_skb")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| if ((value > 0) && |
| ((pkt_dev->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=%d", pkt_dev->burst); |
| return count; |
| } |
| if (!strcmp(name, "node")) { |
| len = num_arg(&user_buffer[i], 10, &value); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| |
| if (node_possible(value)) { |
| pkt_dev->node = value; |
| sprintf(pg_result, "OK: node=%d", pkt_dev->node); |
| if (pkt_dev->page) { |
| put_page(pkt_dev->page); |
| pkt_dev->page = NULL; |
| } |
| } |
| else |
| sprintf(pg_result, "ERROR: node not possible"); |
| return count; |
| } |
| if (!strcmp(name, "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 file_operations pktgen_if_fops = { |
| .open = pktgen_if_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .write = pktgen_if_write, |
| .release = single_release, |
| }; |
| |
| static int pktgen_thread_show(struct seq_file *seq, void *v) |
| { |
| struct pktgen_thread *t = seq->private; |
| const struct pktgen_dev *pkt_dev; |
| |
| BUG_ON(!t); |
| |
| seq_puts(seq, "Running: "); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(pkt_dev, &t->if_list, list) |
| if (pkt_dev->running) |
| seq_printf(seq, "%s ", pkt_dev->odevname); |
| |
| seq_puts(seq, "\nStopped: "); |
| |
| list_for_each_entry_rcu(pkt_dev, &t->if_list, list) |
| if (!pkt_dev->running) |
| seq_printf(seq, "%s ", pkt_dev->odevname); |
| |
| if (t->result[0]) |
| seq_printf(seq, "\nResult: %s\n", t->result); |
| else |
| seq_puts(seq, "\nResult: NA\n"); |
| |
| rcu_read_unlock(); |
| |
| return 0; |
| } |
| |
| static ssize_t pktgen_thread_write(struct file *file, |
| const char __user * user_buffer, |
| size_t count, loff_t * offset) |
| { |
| struct seq_file *seq = file->private_data; |
| struct pktgen_thread *t = seq->private; |
| int i, max, len, ret; |
| char name[40]; |
| char *pg_result; |
| |
| if (count < 1) { |
| // sprintf(pg_result, "Wrong command format"); |
| return -EINVAL; |
| } |
| |
| max = count; |
| len = count_trail_chars(user_buffer, max); |
| if (len < 0) |
| return len; |
| |
| i = len; |
| |
| /* Read variable name */ |
| |
| len = strn_len(&user_buffer[i], sizeof(name) - 1); |
| if (len < 0) |
| return len; |
| |
| memset(name, 0, sizeof(name)); |
| if (copy_from_user(name, &user_buffer[i], len)) |
| return -EFAULT; |
| i += len; |
| |
| max = count - i; |
| len = count_trail_chars(&user_buffer[i], max); |
| if (len < 0) |
| return len; |
| |
| i += len; |
| |
| if (debug) |
| pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); |
| |
| if (!t) { |
| pr_err("ERROR: No thread\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| pg_result = &(t->result[0]); |
| |
| if (!strcmp(name, "add_device")) { |
| char f[32]; |
| memset(f, 0, 32); |
| len = strn_len(&user_buffer[i], sizeof(f) - 1); |
| if (len < 0) { |
| ret = len; |
| goto out; |
| } |
| if (copy_from_user(f, &user_buffer[i], len)) |
| return -EFAULT; |
| i += len; |
| mutex_lock(&pktgen_thread_lock); |
| ret = pktgen_add_device(t, f); |
| mutex_unlock(&pktgen_thread_lock); |
| if (!ret) { |
| ret = count; |
| sprintf(pg_result, "OK: add_device=%s", f); |
| } else |
| sprintf(pg_result, "ERROR: can not add device %s", f); |
| goto out; |
| } |
| |
| if (!strcmp(name, "rem_device_all")) { |
| mutex_lock(&pktgen_thread_lock); |
| t->control |= T_REMDEVALL; |
| mutex_unlock(&pktgen_thread_lock); |
| schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ |
| ret = count; |
| sprintf(pg_result, "OK: rem_device_all"); |
| goto out; |
| } |
| |
| if (!strcmp(name, "max_before_softirq")) { |
| sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); |
| ret = count; |
| goto out; |
| } |
| |
| ret = -EINVAL; |
| out: |
| return ret; |
| } |
| |
| static int pktgen_thread_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, pktgen_thread_show, PDE_DATA(inode)); |
| } |
| |
| static const struct file_operations pktgen_thread_fops = { |
| .open = pktgen_thread_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .write = pktgen_thread_write, |
| .release = single_release, |
| }; |
| |
| /* Think find or remove for NN */ |
| static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, |
| const char *ifname, int remove) |
| { |
| struct pktgen_thread *t; |
| struct pktgen_dev *pkt_dev = NULL; |
| bool exact = (remove == FIND); |
| |
| list_for_each_entry(t, &pn->pktgen_threads, th_list) { |
| pkt_dev = pktgen_find_dev(t, ifname, exact); |
| if (pkt_dev) { |
| if (remove) { |
| pkt_dev->removal_mark = 1; |
| t->control |= T_REMDEV; |
| } |
| break; |
| } |
| } |
| return pkt_dev; |
| } |
| |
| /* |
| * mark a device for removal |
| */ |
| static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) |
| { |
| struct pktgen_dev *pkt_dev = NULL; |
| const int max_tries = 10, msec_per_try = 125; |
| int i = 0; |
| |
| mutex_lock(&pktgen_thread_lock); |
| pr_debug("%s: marking %s for removal\n", __func__, ifname); |
| |
| while (1) { |
| |
| pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); |
| if (pkt_dev == NULL) |
| break; /* success */ |
| |
| mutex_unlock(&pktgen_thread_lock); |
| pr_debug("%s: waiting for %s to disappear....\n", |
| __func__, ifname); |
| schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); |
| mutex_lock(&pktgen_thread_lock); |
| |
| if (++i >= max_tries) { |
| pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", |
| __func__, msec_per_try * i, ifname); |
| break; |
| } |
| |
| } |
| |
| mutex_unlock(&pktgen_thread_lock); |
| } |
| |
| static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) |
| { |
| struct pktgen_thread *t; |
| |
| 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_fops, |
| 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) { |
| pr_err("not an ethernet device: \"%s\"\n", ifname); |
| err = -EINVAL; |
| } else if (!netif_running(odev)) { |
| pr_err("device is down: \"%s\"\n", ifname); |
| err = -ENETDOWN; |
| } else { |
| pkt_dev->odev = odev; |
| return 0; |
| } |
| |
| dev_put(odev); |
| return err; |
| } |
| |
| /* Read pkt_dev from the interface and set up internal pktgen_dev |
| * structure to have the right information to create/send packets |
| */ |
| static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) |
| { |
| int ntxq; |
| |
| if (!pkt_dev->odev) { |
| pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); |
| sprintf(pkt_dev->result, |
| "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); |
| return; |
| } |
| |
| /* make sure that we don't pick a non-existing transmit queue */ |
| ntxq = pkt_dev->odev->real_num_tx_queues; |
| |
| if (ntxq <= pkt_dev->queue_map_min) { |
| pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", |
| pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, |
| pkt_dev->odevname); |
| pkt_dev->queue_map_min = (ntxq ?: 1) - 1; |
| } |
| if (pkt_dev->queue_map_max >= ntxq) { |
| pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", |
| pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, |
| pkt_dev->odevname); |
| pkt_dev->queue_map_max = (ntxq ?: 1) - 1; |
| } |
| |
| /* Default to the interface's mac if not explicitly set. */ |
| |
| if (is_zero_ether_addr(pkt_dev->src_mac)) |
| ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); |
| |
| /* Set up Dest MAC */ |
| ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); |
| |
| if (pkt_dev->flags & F_IPV6) { |
| int i, set = 0, err = 1; |
| struct inet6_dev *idev; |
| |
| if (pkt_dev->min_pkt_size == 0) { |
| pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) |
| + sizeof(struct udphdr) |
| + sizeof(struct pktgen_hdr) |
| + pkt_dev->pkt_overhead; |
| } |
| |
| for (i = 0; i < 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_tc(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++; |
| /* fall through */ |
| 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; |
| |
| BUG_ON(smp_processor_id() != cpu); |
| |
| init_waitqueue_head(&t->queue); |
| complete(&t->start_done); |
| |
| pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); |
| |
| set_freezable(); |
| |
| 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_fops, pkt_dev); |
| if (!pkt_dev->entry) { |
| pr_err("cannot create %s/%s procfs entry\n", |
| PG_PROC_DIR, ifname); |
| err = -EINVAL; |
| goto out2; |
| } |
| #ifdef CONFIG_XFRM |
| pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; |
| pkt_dev->ipsproto = IPPROTO_ESP; |
| |
| /* xfrm tunnel mode needs additional dst to extract outter |
| * ip header protocol/ttl/id field, here creat a phony one. |
| * instead of looking for a valid rt, which definitely hurting |
| * performance under such circumstance. |
| */ |
| pkt_dev->dstops.family = AF_INET; |
| pkt_dev->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("kernel_thread() failed for cpu %d\n", t->cpu); |
| list_del(&t->th_list); |
| kfree(t); |
| return PTR_ERR(p); |
| } |
| kthread_bind(p, cpu); |
| t->tsk = p; |
| |
| pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, |
| &pktgen_thread_fops, t); |
| if (!pe) { |
| pr_err("cannot create %s/%s procfs entry\n", |
| PG_PROC_DIR, t->tsk->comm); |
| kthread_stop(p); |
| list_del(&t->th_list); |
| kfree(t); |
| return -EINVAL; |
| } |
| |
| t->net = pn; |
| 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_fops); |
| if (pe == NULL) { |
| pr_err("cannot create %s procfs entry\n", PGCTRL); |
| ret = -EINVAL; |
| goto remove; |
| } |
| |
| for_each_online_cpu(cpu) { |
| int err; |
| |
| err = pktgen_create_thread(cpu, pn); |
| if (err) |
| pr_warn("Cannot create thread for cpu %d (%d)\n", |
| cpu, err); |
| } |
| |
| if (list_empty(&pn->pktgen_threads)) { |
| pr_err("Initialization failed for all threads\n"); |
| ret = -ENODEV; |
| goto remove_entry; |
| } |
| |
| return 0; |
| |
| remove_entry: |
| remove_proc_entry(PGCTRL, pn->proc_dir); |
| remove: |
| remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); |
| return ret; |
| } |
| |
| static void __net_exit pg_net_exit(struct net *net) |
| { |
| struct pktgen_net *pn = net_generic(net, pg_net_id); |
| struct pktgen_thread *t; |
| struct list_head *q, *n; |
| LIST_HEAD(list); |
| |
| /* Stop all interfaces & threads */ |
| pn->pktgen_exiting = true; |
| |
| mutex_lock(&pktgen_thread_lock); |
| list_splice_init(&pn->pktgen_threads, &list); |
| mutex_unlock(&pktgen_thread_lock); |
| |
| list_for_each_safe(q, n, &list) { |
| t = list_entry(q, struct pktgen_thread, th_list); |
| list_del(&t->th_list); |
| kthread_stop(t->tsk); |
| 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"); |
