Annotation of embedaddon/bmon/src/in_proc.c, revision 1.1.1.2
1.1 misho 1: /*
2: * in_proc.c /proc/net/dev Input (Linux)
3: *
1.1.1.2 ! misho 4: * Copyright (c) 2001-2013 Thomas Graf <tgraf@suug.ch>
! 5: * Copyright (c) 2013 Red Hat, Inc.
1.1 misho 6: *
7: * Permission is hereby granted, free of charge, to any person obtaining a
8: * copy of this software and associated documentation files (the "Software"),
9: * to deal in the Software without restriction, including without limitation
10: * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11: * and/or sell copies of the Software, and to permit persons to whom the
12: * Software is furnished to do so, subject to the following conditions:
13: *
14: * The above copyright notice and this permission notice shall be included
15: * in all copies or substantial portions of the Software.
16: *
17: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18: * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22: * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23: * DEALINGS IN THE SOFTWARE.
24: */
25:
26: #include <bmon/bmon.h>
27: #include <bmon/input.h>
1.1.1.2 ! misho 28: #include <bmon/element.h>
! 29: #include <bmon/group.h>
! 30: #include <bmon/attr.h>
1.1 misho 31: #include <bmon/utils.h>
32:
1.1.1.2 ! misho 33: static const char *c_path = "/proc/net/dev";
! 34: static const char *c_group = DEFAULT_GROUP;
! 35: static struct element_group *grp;
! 36:
! 37: enum {
! 38: PROC_BYTES,
! 39: PROC_PACKETS,
! 40: PROC_ERRORS,
! 41: PROC_DROP,
! 42: PROC_COMPRESSED,
! 43: PROC_FIFO,
! 44: PROC_FRAME,
! 45: PROC_MCAST,
! 46: NUM_PROC_VALUE,
! 47: };
! 48:
! 49: static struct attr_map link_attrs[NUM_PROC_VALUE] = {
! 50: {
! 51: .name = "bytes",
! 52: .type = ATTR_TYPE_COUNTER,
! 53: .unit = UNIT_BYTE,
! 54: .description = "Bytes",
! 55: },
! 56: {
! 57: .name = "packets",
! 58: .type = ATTR_TYPE_COUNTER,
! 59: .unit = UNIT_NUMBER,
! 60: .description = "Packets",
! 61: },
! 62: {
! 63: .name = "errors",
! 64: .type = ATTR_TYPE_COUNTER,
! 65: .unit = UNIT_NUMBER,
! 66: .description = "Errors",
! 67: },
! 68: {
! 69: .name = "drop",
! 70: .type = ATTR_TYPE_COUNTER,
! 71: .unit = UNIT_NUMBER,
! 72: .description = "Dropped",
! 73: },
! 74: {
! 75: .name = "compressed",
! 76: .type = ATTR_TYPE_COUNTER,
! 77: .unit = UNIT_NUMBER,
! 78: .description = "Compressed",
! 79: },
! 80: {
! 81: .name = "fifoerr",
! 82: .type = ATTR_TYPE_COUNTER,
! 83: .unit = UNIT_NUMBER,
! 84: .description = "FIFO Error",
! 85: },
! 86: {
! 87: .name = "frameerr",
! 88: .type = ATTR_TYPE_COUNTER,
! 89: .unit = UNIT_NUMBER,
! 90: .description = "Frame Error",
! 91: },
! 92: {
! 93: .name = "mcast",
! 94: .type = ATTR_TYPE_COUNTER,
! 95: .unit = UNIT_NUMBER,
! 96: .description = "Multicast",
! 97: }
! 98: };
1.1 misho 99:
100: static void proc_read(void)
101: {
1.1.1.2 ! misho 102: struct element *e;
! 103: FILE *fd;
! 104: char buf[512], *p, *s;
! 105: int w;
1.1 misho 106:
107: if (!(fd = fopen(c_path, "r")))
108: quit("Unable to open file %s: %s\n", c_path, strerror(errno));
1.1.1.2 ! misho 109:
! 110: /* Ignore header */
1.1 misho 111: fgets(buf, sizeof(buf), fd);
112: fgets(buf, sizeof(buf), fd);
113:
114: for (; fgets(buf, sizeof(buf), fd);) {
1.1.1.2 ! misho 115: uint64_t data[NUM_PROC_VALUE][2];
! 116: int i;
1.1 misho 117:
118: if (buf[0] == '\r' || buf[0] == '\n')
119: continue;
1.1.1.2 ! misho 120:
1.1 misho 121: if (!(p = strchr(buf, ':')))
122: continue;
123: *p = '\0';
124: s = (p + 1);
125:
126: for (p = &buf[0]; *p == ' '; p++);
127:
128: w = sscanf(s, "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
129: "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
130: "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
1.1.1.2 ! misho 131: "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64
! 132: "\n",
! 133: &data[PROC_BYTES][0],
! 134: &data[PROC_PACKETS][0],
! 135: &data[PROC_ERRORS][0],
! 136: &data[PROC_DROP][0],
! 137: &data[PROC_FIFO][0],
! 138: &data[PROC_FRAME][0],
! 139: &data[PROC_COMPRESSED][0],
! 140: &data[PROC_MCAST][0],
! 141: &data[PROC_BYTES][1],
! 142: &data[PROC_PACKETS][1],
! 143: &data[PROC_ERRORS][1],
! 144: &data[PROC_DROP][1],
! 145: &data[PROC_FIFO][1],
! 146: &data[PROC_FRAME][1],
! 147: &data[PROC_COMPRESSED][1],
! 148: &data[PROC_MCAST][1]);
! 149:
1.1 misho 150: if (w != 16)
151: continue;
152:
1.1.1.2 ! misho 153: if (!(e = element_lookup(grp, p, 0, NULL, ELEMENT_CREAT)))
! 154: return;
! 155:
! 156: if (e->e_flags & ELEMENT_FLAG_CREATED) {
! 157: if (element_set_key_attr(e, "bytes", "packets") ||
! 158: element_set_usage_attr(e, "bytes"))
! 159: BUG();
! 160:
! 161: e->e_flags &= ~ELEMENT_FLAG_CREATED;
! 162: }
! 163:
! 164: for (i = 0; i < ARRAY_SIZE(link_attrs); i++) {
! 165: struct attr_map *m = &link_attrs[i];
! 166:
! 167: attr_update(e, m->attrid, data[i][0], data[i][1],
! 168: UPDATE_FLAG_RX | UPDATE_FLAG_TX);
! 169: }
! 170:
! 171: element_notify_update(e, NULL);
! 172: element_lifesign(e, 1);
1.1 misho 173: }
174:
175: fclose(fd);
176: }
177:
178: static void print_help(void)
179: {
180: printf(
181: "proc - procfs statistic collector for Linux" \
182: "\n" \
183: " Reads statistics from procfs (/proc/net/dev)\n" \
184: " Author: Thomas Graf <tgraf@suug.ch>\n" \
185: "\n" \
186: " Options:\n" \
1.1.1.2 ! misho 187: " file=PATH Path to statistics file (default: /proc/net/dev)\n"
! 188: " group=NAME Name of group\n");
1.1 misho 189: }
190:
1.1.1.2 ! misho 191: static void proc_parse_opt(const char *type, const char *value)
1.1 misho 192: {
1.1.1.2 ! misho 193: if (!strcasecmp(type, "file") && value)
! 194: c_path = value;
! 195: else if (!strcasecmp(type, "group") && value)
! 196: c_group = value;
! 197: else if (!strcasecmp(type, "help")) {
! 198: print_help();
! 199: exit(0);
1.1 misho 200: }
201: }
202:
1.1.1.2 ! misho 203: static int proc_do_init(void)
! 204: {
! 205: if (attr_map_load(link_attrs, ARRAY_SIZE(link_attrs)) ||
! 206: !(grp = group_lookup(c_group, GROUP_CREATE)))
! 207: BUG();
! 208:
! 209: return 0;
! 210: }
! 211:
1.1 misho 212: static int proc_probe(void)
213: {
214: FILE *fd = fopen(c_path, "r");
215:
216: if (fd) {
217: fclose(fd);
218: return 1;
219: }
220: return 0;
221: }
222:
1.1.1.2 ! misho 223: static struct bmon_module proc_ops = {
! 224: .m_name = "proc",
! 225: .m_do = proc_read,
! 226: .m_parse_opt = proc_parse_opt,
! 227: .m_probe = proc_probe,
! 228: .m_init = proc_do_init,
1.1 misho 229: };
230:
231: static void __init proc_init(void)
232: {
1.1.1.2 ! misho 233: input_register(&proc_ops);
1.1 misho 234: }
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