/* * netsniff-ng - the packet sniffing beast * Copyright 2012 Markus Amend , Deutsche Flugsicherung GmbH * Subject to the GPL, version 2. * * IPv6 Destination Options Header described in RFC2460 */ #include #include #include /* for ntohs() */ #include "proto.h" #include "protos.h" #include "dissector_eth.h" #include "built_in.h" #include "pkt_buff.h" struct dest_optshdr { uint8_t h_next_header; uint8_t hdr_len; } __packed; static void dissect_opt_dest(struct pkt_buff *pkt, ssize_t *opt_len) { /* Have to been upgraded. * http://tools.ietf.org/html/rfc2460#section-4.2 * Look also for proto_ipv6_hop_by_hop.h, it needs * dissect_opt(), too. */ if (*opt_len) tprintf(", Option(s) recognized "); /* If adding dissector reduce opt_len for each using of pkt_pull * to the same size. */ } static void dest_opts(struct pkt_buff *pkt) { uint16_t hdr_ext_len; ssize_t opt_len; struct dest_optshdr *dest_ops; dest_ops = (struct dest_optshdr *) pkt_pull(pkt, sizeof(*dest_ops)); if (dest_ops == NULL) return; /* Total Header Length in Bytes */ hdr_ext_len = (dest_ops->hdr_len + 1) * 8; /* Options length in Bytes */ opt_len = hdr_ext_len - sizeof(*dest_ops); tprintf("\t [ Destination Options "); tprintf("NextHdr (%u), ", dest_ops->h_next_header); if (opt_len > pkt_len(pkt) || opt_len < 0) { tprintf("HdrExtLen (%u, %u Bytes, %s)", dest_ops->hdr_len, hdr_ext_len, colorize_start_full(black, red) "invalid" colorize_end()); return; } tprintf("HdrExtLen (%u, %u Bytes)", dest_ops->hdr_len, hdr_ext_len); dissect_opt_dest(pkt, &opt_len); tprintf(" ]\n"); pkt_pull(pkt, opt_len); pkt_set_proto(pkt, ð_lay3, dest_ops->h_next_header); } static void dest_opts_less(struct pkt_buff *pkt) { uint16_t hdr_ext_len; ssize_t opt_len; struct dest_optshdr *dest_ops; dest_ops = (struct dest_optshdr *) pkt_pull(pkt, sizeof(*dest_ops)); if (dest_ops == NULL) return; /* Total Header Length in Bytes */ hdr_ext_len = (dest_ops->hdr_len + 1) * 8; /* Options length in Bytes */ opt_len = hdr_ext_len - sizeof(*dest_ops); if (opt_len > pkt_len(pkt) || opt_len < 0) return; tprintf(" Dest Ops"); pkt_pull(pkt, opt_len); pkt_set_proto(pkt, ð_lay3, dest_ops->h_next_header); } struct protocol ipv6_dest_opts_ops = { .key = 0x3C, .print_full = dest_opts, .print_less = dest_opts_less, }; ='submit' value='search'/>
diff options
context:
space:
mode:
authorDavid Ahern <dsa@cumulusnetworks.com>2016-08-01 13:49:29 -0700
committerIngo Molnar <mingo@kernel.org>2016-08-02 10:23:57 +0200
commit0d87d7ec22a0879d3926faa4f4f4412a5dee1fba (patch)
tree8ee6e51bc056e8e57dc3ffb920c854ac69099290
parent005bd0077a79c4bcfe64e7331b275e12f742093f (diff)
perf/core: Change log level for duration warning to KERN_INFO
When the perf interrupt handler exceeds a threshold warning messages are displayed on console: [12739.31793] perf interrupt took too long (2504 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [71340.165065] perf interrupt took too long (5005 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 Many customers and users are confused by the message wondering if something is wrong or they need to take action to fix a problem. Since a user can not do anything to fix the issue, the message is really more informational than a warning. Adjust the log level accordingly. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1470084569-438-1-git-send-email-dsa@cumulusnetworks.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat