/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include #include #include #include #include #include #include #include #include "xmalloc.h" #include "die.h" #include "ring_rx.h" #include "built_in.h" void destroy_rx_ring(int sock, struct ring *ring) { int ret; bool v3 = get_sockopt_tpacket(sock) == TPACKET_V3; munmap(ring->mm_space, ring->mm_len); ring->mm_len = 0; xfree(ring->frames); /* In general, this is freed during close(2) anyway. */ if (v3) return; fmemset(&ring->layout, 0, sizeof(ring->layout)); ret = setsockopt(sock, SOL_PACKET, PACKET_RX_RING, &ring->layout, sizeof(ring->layout)); if (unlikely(ret)) panic("Cannot destroy the RX_RING: %s!\n", strerror(errno)); } void setup_rx_ring_layout(int sock, struct ring *ring, unsigned int size, bool jumbo_support, bool v3) { fmemset(&ring->layout, 0, sizeof(ring->layout)); ring->layout.tp_block_size = (jumbo_support ? getpagesize() << 4 : getpagesize() << 2); ring->layout.tp_frame_size = (jumbo_support ? TPACKET_ALIGNMENT << 12 : TPACKET_ALIGNMENT << 7); ring->layout.tp_block_nr = size / ring->layout.tp_block_size; ring->layout.tp_frame_nr = ring->layout.tp_block_size / ring->layout.tp_frame_size * ring->layout.tp_block_nr; if (v3) { /* Pass out, if this will ever change and we do crap on it! */ build_bug_on(offsetof(struct tpacket_req, tp_frame_nr) != offsetof(struct tpacket_req3, tp_frame_nr) && sizeof(struct tpacket_req) != offsetof(struct tpacket_req3, tp_retire_blk_tov)); ring->layout3.tp_retire_blk_tov = 100; /* 0: let kernel decide */ ring->layout3.tp_sizeof_priv = 0; ring->layout3.tp_feature_req_word = 0; set_sockopt_tpacket_v3(sock); } else { set_sockopt_tpacket_v2(sock); } ring_verify_layout(ring); } void create_rx_ring(int sock, struct ring *ring, int verbose) { int ret; bool v3 = get_sockopt_tpacket(sock) == TPACKET_V3; retry: ret = setsockopt(sock, SOL_PACKET, PACKET_RX_RING, &ring->raw, v3 ? sizeof(ring->layout3) : sizeof(ring->layout)); if (errno == ENOMEM && ring->layout.tp_block_nr > 1) { ring->layout.tp_block_nr >>= 1; ring->layout.tp_frame_nr = ring->layout.tp_block_size / ring->layout.tp_frame_size * ring->layout.tp_block_nr; goto retry; } if (ret < 0) panic("Cannot allocate RX_RING!\n"); ring->mm_len = ring->layout.tp_block_size * ring->layout.tp_block_nr; if (verbose) { printf("RX: %.2Lf MiB, %u Frames, each %u Byte allocated\n", (long double) ring->mm_len / (1 << 20), ring->layout.tp_frame_nr, ring->layout.tp_frame_size); } } void mmap_rx_ring(int sock, struct ring *ring) { mmap_ring_generic(sock, ring); } void alloc_rx_ring_frames(int sock, struct ring *ring) { int num; size_t size; bool v3 = get_sockopt_tpacket(sock) == TPACKET_V3; if (v3) { num = ring->layout3.tp_block_nr; size = ring->layout3.tp_block_size; } else { num = ring->layout.tp_frame_nr; size = ring->layout.tp_frame_size; } alloc_ring_frames_generic(ring, num, size); } void bind_rx_ring(int sock, struct ring *ring, int ifindex) { bind_ring_generic(sock, ring, ifindex); } void sock_rx_net_stats(int sock) { int ret; bool v3 = get_sockopt_tpacket(sock) == TPACKET_V3; union { struct tpacket_stats k2; struct tpacket_stats_v3 k3; } stats; socklen_t slen = v3 ? sizeof(stats.k3) : sizeof(stats.k2); memset(&stats, 0, sizeof(stats)); ret = getsockopt(sock, SOL_PACKET, PACKET_STATISTICS, &stats, &slen); if (ret > -1) { uint64_t packets = stats.k3.tp_packets; uint64_t drops = stats.k3.tp_drops; printf("\r%12ld packets incoming\n", packets); printf("\r%12ld packets passed filter\n", packets - drops); printf("\r%12ld packets failed filter (out of space)\n", drops); if (stats.k3.tp_packets > 0) printf("\r%12.4lf%\% packet droprate\n", (1.0 * drops / packets) * 100.0); } } ion value='7'>7space:mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-10 20:16:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-10 20:16:43 -0700
commit101105b1717f536ca741f940033996302d4ef191 (patch)
tree12ab41ae1b1b66105e9fa2ea763356d2be7e8b34 /Documentation/i2c/fault-codes
parent35ff96dfd3c9aaa921b3e8dcac76b7697f2dcec0 (diff)
parent3873691e5ab34fa26948643d038a2b98c4437298 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs updates from Al Viro: ">rename2() work from Miklos + current_time() from Deepa" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: Replace current_fs_time() with current_time() fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps fs: Replace CURRENT_TIME with current_time() for inode timestamps fs: proc: Delete inode time initializations in proc_alloc_inode() vfs: Add current_time() api vfs: add note about i_op->rename changes to porting fs: rename "rename2" i_op to "rename" vfs: remove unused i_op->rename fs: make remaining filesystems use .rename2 libfs: support RENAME_NOREPLACE in simple_rename() fs: support RENAME_NOREPLACE for local filesystems ncpfs: fix unused variable warning
Diffstat (limited to 'Documentation/i2c/fault-codes')