/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Copyright 2014 Tobias Klauser * Subject to the GPL, version 2. */ #include #include #include #include #include "proto.h" #include "dissector_eth.h" #include "lookup.h" #include "pkt_buff.h" static inline bool is_multicast_ether_addr(const uint8_t *mac) { return mac[0] & 0x01; } static inline bool is_broadcast_ether_addr(const uint8_t *mac) { return (mac[0] & mac[1] & mac[2] & mac[3] & mac[4] & mac[5]) == 0xff; } static inline bool is_local_ether_addr(const u8 *mac) { return 0x02 & mac[0]; } static const char *ether_lookup_addr(const uint8_t *mac) { if (is_multicast_ether_addr(mac)) { if (is_broadcast_ether_addr(mac)) return "Broadcast"; else return "Multicast"; } else if (is_local_ether_addr(mac)) { return "Locally Administered"; } /* found no matching address, so look up the vendor from OUI */ return lookup_vendor_str((mac[0] << 16) | (mac[1] << 8) | mac[2]); } static void ethernet(struct pkt_buff *pkt) { const char *type; uint8_t *src_mac, *dst_mac; struct ethhdr *eth = (struct ethhdr *) pkt_pull(pkt, sizeof(*eth)); if (eth == NULL) return; src_mac = eth->h_source; dst_mac = eth->h_dest; tprintf(" [ Eth "); tprintf("MAC (%.2x:%.2x:%.2x:%.2x:%.2x:%.2x => ", src_mac[0], src_mac[1], src_mac[2], src_mac[3], src_mac[4], src_mac[5]); tprintf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x), ", dst_mac[0], dst_mac[1], dst_mac[2], dst_mac[3], dst_mac[4], dst_mac[5]); tprintf("Proto (0x%.4x", ntohs(eth->h_proto)); type = lookup_ether_type(ntohs(eth->h_proto)); if (type) tprintf(", %s%s%s", colorize_start(bold), type, colorize_end()); tprintf(") ]\n"); tprintf(" [ Vendor "); tprintf("(%s => %s)", ether_lookup_addr(src_mac), ether_lookup_addr(dst_mac)); tprintf(" ]\n"); pkt_set_dissector(pkt, ð_lay2, ntohs(eth->h_proto)); } static void ethernet_less(struct pkt_buff *pkt) { uint8_t *src_mac, *dst_mac; struct ethhdr *eth = (struct ethhdr *) pkt_pull(pkt, sizeof(*eth)); if (eth == NULL) return; src_mac = eth->h_source; dst_mac = eth->h_dest; tprintf(" %s => %s ", ether_lookup_addr(src_mac), ether_lookup_addr(dst_mac)); tprintf("%s%s%s", colorize_start(bold), lookup_ether_type(ntohs(eth->h_proto)), colorize_end()); pkt_set_dissector(pkt, ð_lay2, ntohs(eth->h_proto)); } struct protocol ethernet_ops = { .key = 0, .print_full = ethernet, .print_less = ethernet_less, }; e'>range
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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /tools/arch/arc/include/uapi
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/arch/arc/include/uapi')