/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010, 2011, 2012 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include #include #include "built_in.h" #include "tprintf.h" #include "pkt_buff.h" #include "proto.h" #include "dissector.h" #include "dissector_eth.h" #include "dissector_80211.h" #include "dissector_netlink.h" #include "linktype.h" int dissector_set_print_type(void *ptr, int type) { struct protocol *proto; for (proto = ptr; proto; proto = proto->next) { switch (type) { case PRINT_NORM: proto->process = proto->print_full; break; case PRINT_LESS: proto->process = proto->print_less; break; default: proto->process = NULL; break; } } return 0; } static void dissector_main(struct pkt_buff *pkt, struct protocol *start, struct protocol *end) { struct protocol *proto; if (!start) return; for (pkt->proto = start; pkt->proto; ) { if (unlikely(!pkt->proto->process)) break; proto = pkt->proto; pkt->proto = NULL; proto->process(pkt); } if (end && likely(end->process)) end->process(pkt); } void dissector_entry_point(uint8_t *packet, size_t len, int linktype, int mode) { struct protocol *proto_start, *proto_end; struct pkt_buff *pkt; if (mode == PRINT_NONE) return; pkt = pkt_alloc(packet, len); switch (linktype) { case LINKTYPE_EN10MB: case ___constant_swab32(LINKTYPE_EN10MB): proto_start = dissector_get_ethernet_entry_point(); proto_end = dissector_get_ethernet_exit_point(); break; case LINKTYPE_IEEE802_11: case ___constant_swab32(LINKTYPE_IEEE802_11): proto_start = dissector_get_ieee80211_entry_point(); proto_end = dissector_get_ieee80211_exit_point(); break; case LINKTYPE_NETLINK: case ___constant_swab32(LINKTYPE_NETLINK): proto_start = dissector_get_netlink_entry_point(); proto_end = dissector_get_netlink_exit_point(); break; default: proto_start = &none_ops; proto_end = NULL; break; }; dissector_main(pkt, proto_start, proto_end); switch (mode) { case PRINT_HEX: hex(pkt); break; case PRINT_ASCII: ascii(pkt); break; case PRINT_HEX_ASCII: hex_ascii(pkt); break; } tprintf_flush(); pkt_free(pkt); } void dissector_init_all(int fnttype) { dissector_init_ethernet(fnttype); dissector_init_ieee80211(fnttype); dissector_init_netlink(fnttype); } void dissector_cleanup_all(void) { dissector_cleanup_ethernet(); dissector_cleanup_ieee80211(); dissector_cleanup_netlink(); } remove'/>
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authorThomas Gleixner <tglx@linutronix.de>2016-10-24 11:41:56 +0200
committerThomas Gleixner <tglx@linutronix.de>2016-10-25 16:27:39 +0200
commitb831275a3553c32091222ac619cfddd73a5553fb (patch)
tree83869391da1625c235e75b4584dfcff9b0b189ca /Documentation/devicetree
parent07d9a380680d1c0eb51ef87ff2eab5c994949e69 (diff)
timers: Plug locking race vs. timer migration
Linus noticed that lock_timer_base() lacks a READ_ONCE() for accessing the timer flags. As a consequence the compiler is allowed to reload the flags between the initial check for TIMER_MIGRATION and the following timer base computation and the spin lock of the base. While this has not been observed (yet), we need to make sure that it never happens. Fixes: 0eeda71bc30d ("timer: Replace timer base by a cpu index") Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1610241711220.4983@nanos Cc: stable@vger.kernel.org Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org>
Diffstat (limited to 'Documentation/devicetree')