Initial import
This commit is contained in:
Thomas Graf
234
src/in_proc.c
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234
src/in_proc.c
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/*
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* in_proc.c /proc/net/dev Input (Linux)
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*
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* Copyright (c) 2001-2013 Thomas Graf <tgraf@suug.ch>
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* Copyright (c) 2013 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <bmon/bmon.h>
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#include <bmon/input.h>
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#include <bmon/element.h>
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#include <bmon/group.h>
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#include <bmon/attr.h>
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#include <bmon/utils.h>
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static const char *c_path = "/proc/net/dev";
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static const char *c_group = DEFAULT_GROUP;
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static struct element_group *grp;
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enum {
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PROC_BYTES,
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PROC_PACKETS,
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PROC_ERRORS,
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PROC_DROP,
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PROC_COMPRESSED,
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PROC_FIFO,
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PROC_FRAME,
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PROC_MCAST,
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NUM_PROC_VALUE,
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};
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static struct attr_map link_attrs[NUM_PROC_VALUE] = {
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{
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.name = "bytes",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_BYTE,
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.description = "Bytes",
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},
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{
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.name = "packets",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "Packtes",
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},
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{
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.name = "errors",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "Errors",
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},
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{
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.name = "drop",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "Dropped",
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},
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{
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.name = "compressed",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "Compressed",
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},
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{
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.name = "fifoerr",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "FIFO Error",
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},
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{
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.name = "frameerr",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "Frame Error",
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},
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{
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.name = "mcast",
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.type = ATTR_TYPE_COUNTER,
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.unit = UNIT_NUMBER,
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.description = "Multicast",
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}
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};
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static void proc_read(void)
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{
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struct element *e;
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FILE *fd;
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char buf[512], *p, *s;
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int w;
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if (!(fd = fopen(c_path, "r")))
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quit("Unable to open file %s: %s\n", c_path, strerror(errno));
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/* Ignore header */
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fgets(buf, sizeof(buf), fd);
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fgets(buf, sizeof(buf), fd);
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for (; fgets(buf, sizeof(buf), fd);) {
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uint64_t data[NUM_PROC_VALUE][2];
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int i;
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if (buf[0] == '\r' || buf[0] == '\n')
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continue;
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if (!(p = strchr(buf, ':')))
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continue;
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*p = '\0';
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s = (p + 1);
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for (p = &buf[0]; *p == ' '; p++);
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w = sscanf(s, "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
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"%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
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"%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
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"%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64
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"\n",
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&data[PROC_BYTES][0],
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&data[PROC_PACKETS][0],
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&data[PROC_ERRORS][0],
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&data[PROC_DROP][0],
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&data[PROC_FIFO][0],
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&data[PROC_FRAME][0],
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&data[PROC_COMPRESSED][0],
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&data[PROC_MCAST][0],
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&data[PROC_BYTES][1],
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&data[PROC_PACKETS][1],
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&data[PROC_ERRORS][1],
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&data[PROC_DROP][1],
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&data[PROC_FIFO][1],
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&data[PROC_FRAME][1],
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&data[PROC_COMPRESSED][1],
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&data[PROC_MCAST][1]);
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if (w != 16)
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continue;
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if (!(e = element_lookup(grp, p, 0, NULL, ELEMENT_CREAT)))
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return;
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if (e->e_flags & ELEMENT_FLAG_CREATED) {
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if (element_set_key_attr(e, "bytes", "packets") ||
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element_set_usage_attr(e, "bytes"))
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BUG();
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e->e_flags &= ~ELEMENT_FLAG_CREATED;
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}
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for (i = 0; i < ARRAY_SIZE(link_attrs); i++) {
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struct attr_map *m = &link_attrs[i];
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attr_update(e, m->attrid, data[i][0], data[i][1],
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UPDATE_FLAG_RX | UPDATE_FLAG_TX);
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}
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element_notify_update(e, NULL);
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element_lifesign(e, 1);
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}
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fclose(fd);
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}
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static void print_help(void)
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{
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printf(
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"proc - procfs statistic collector for Linux" \
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"\n" \
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" Reads statistics from procfs (/proc/net/dev)\n" \
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" Author: Thomas Graf <tgraf@suug.ch>\n" \
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"\n" \
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" Options:\n" \
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" file=PATH Path to statistics file (default: /proc/net/dev)\n"
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" group=NAME Name of group\n");
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}
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static void proc_parse_opt(const char *type, const char *value)
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{
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if (!strcasecmp(type, "file") && value)
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c_path = value;
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else if (!strcasecmp(type, "group") && value)
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c_group = value;
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else if (!strcasecmp(type, "help")) {
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print_help();
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exit(0);
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}
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}
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static int proc_do_init(void)
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{
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if (attr_map_load(link_attrs, ARRAY_SIZE(link_attrs)) ||
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!(grp = group_lookup(c_group, GROUP_CREATE)))
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BUG();
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return 0;
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}
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static int proc_probe(void)
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{
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FILE *fd = fopen(c_path, "r");
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if (fd) {
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fclose(fd);
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return 1;
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}
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return 0;
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}
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static struct bmon_module proc_ops = {
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.m_name = "proc",
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.m_do = proc_read,
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.m_parse_opt = proc_parse_opt,
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.m_probe = proc_probe,
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.m_init = proc_do_init,
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};
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static void __init proc_init(void)
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{
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input_register(&proc_ops);
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}
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