/* * 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); } } />
authorArnd Bergmann <arnd@arndb.de>2017-02-03 17:37:03 +0100
committerDavid S. Miller <davem@davemloft.net>2017-02-06 16:35:12 -0500
commit321fa4ffd94e333657e54037d2511c862ec92f6f (patch)
treef92da6f4bff94602cadfe8d57d53fd7950c420dd
parentd0d7b10b05945f40fefd4e60f457c61aefa3e9a9 (diff)
net/mlx5e: fix another maybe-uninitialized false-positive
In commit abeffce ("net/mlx5e: Fix a -Wmaybe-uninitialized warning"), I fixed a gcc warning for the ipv4 offload handling. Now we get the same warning for the added ipv6 support: drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:815:40: warning: 'out_dev' may be used uninitialized in this function [-Wmaybe-uninitialized] We can apply the same workaround here as well. Fixes: ce99f6b97fcd ("net/mlx5e: Support SRIOV TC encapsulation offloads for IPv6 tunnels") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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