| 1 |
/* |
| 2 |
* i-scream libstatgrab |
| 3 |
* http://www.i-scream.org |
| 4 |
* Copyright (C) 2000-2004 i-scream |
| 5 |
* |
| 6 |
* This library is free software; you can redistribute it and/or |
| 7 |
* modify it under the terms of the GNU Lesser General Public |
| 8 |
* License as published by the Free Software Foundation; either |
| 9 |
* version 2.1 of the License, or (at your option) any later version. |
| 10 |
* |
| 11 |
* This library is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 |
* Lesser General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU Lesser General Public |
| 17 |
* License along with this library; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 |
* 02111-1307 USA |
| 20 |
* |
| 21 |
* $Id: disk_stats.c,v 1.64 2004/04/07 10:33:50 ats Exp $ |
| 22 |
*/ |
| 23 |
|
| 24 |
#ifdef HAVE_CONFIG_H |
| 25 |
#include "config.h" |
| 26 |
#endif |
| 27 |
|
| 28 |
#include <stdio.h> |
| 29 |
#include <stdlib.h> |
| 30 |
#include <string.h> |
| 31 |
#include <time.h> |
| 32 |
#include "statgrab.h" |
| 33 |
#include "vector.h" |
| 34 |
#include "tools.h" |
| 35 |
|
| 36 |
#ifdef SOLARIS |
| 37 |
#include <sys/mnttab.h> |
| 38 |
#include <sys/statvfs.h> |
| 39 |
#include <kstat.h> |
| 40 |
#define VALID_FS_TYPES {"ufs", "tmpfs"} |
| 41 |
#endif |
| 42 |
|
| 43 |
#if defined(LINUX) || defined(CYGWIN) |
| 44 |
#include <mntent.h> |
| 45 |
#include <sys/vfs.h> |
| 46 |
#endif |
| 47 |
|
| 48 |
#ifdef LINUX |
| 49 |
#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \ |
| 50 |
"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \ |
| 51 |
"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \ |
| 52 |
"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \ |
| 53 |
"umsdos", "vfat", "xfs", "jfs"} |
| 54 |
#endif |
| 55 |
|
| 56 |
#ifdef CYGWIN |
| 57 |
#define VALID_FS_TYPES {"user"} |
| 58 |
#endif |
| 59 |
|
| 60 |
#ifdef ALLBSD |
| 61 |
#include <sys/param.h> |
| 62 |
#include <sys/ucred.h> |
| 63 |
#include <sys/mount.h> |
| 64 |
#endif |
| 65 |
#if defined(FREEBSD) || defined(DFBSD) |
| 66 |
#include <sys/dkstat.h> |
| 67 |
#include <devstat.h> |
| 68 |
#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \ |
| 69 |
"ufs", "mfs"} |
| 70 |
#endif |
| 71 |
#if defined(NETBSD) || defined(OPENBSD) |
| 72 |
#include <sys/param.h> |
| 73 |
#include <sys/sysctl.h> |
| 74 |
#include <sys/disk.h> |
| 75 |
#define VALID_FS_TYPES {"ffs", "mfs", "msdos", "lfs", "adosfs", "ext2fs", \ |
| 76 |
"ntfs"} |
| 77 |
#endif |
| 78 |
|
| 79 |
static void disk_stat_init(sg_fs_stats *d) { |
| 80 |
d->device_name = NULL; |
| 81 |
d->fs_type = NULL; |
| 82 |
d->mnt_point = NULL; |
| 83 |
} |
| 84 |
|
| 85 |
static void disk_stat_destroy(sg_fs_stats *d) { |
| 86 |
free(d->device_name); |
| 87 |
free(d->fs_type); |
| 88 |
free(d->mnt_point); |
| 89 |
} |
| 90 |
|
| 91 |
static int is_valid_fs_type(const char *type) { |
| 92 |
const char *types[] = VALID_FS_TYPES; |
| 93 |
int i; |
| 94 |
|
| 95 |
for (i = 0; i < (sizeof types / sizeof *types); i++) { |
| 96 |
if (strcmp(types[i], type) == 0) { |
| 97 |
return 1; |
| 98 |
} |
| 99 |
} |
| 100 |
return 0; |
| 101 |
} |
| 102 |
|
| 103 |
sg_fs_stats *sg_get_fs_stats(int *entries){ |
| 104 |
VECTOR_DECLARE_STATIC(disk_stats, sg_fs_stats, 10, |
| 105 |
disk_stat_init, disk_stat_destroy); |
| 106 |
|
| 107 |
int valid_type; |
| 108 |
int num_disks=0; |
| 109 |
#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN) |
| 110 |
FILE *f; |
| 111 |
#endif |
| 112 |
|
| 113 |
sg_fs_stats *disk_ptr; |
| 114 |
|
| 115 |
#ifdef SOLARIS |
| 116 |
struct mnttab mp; |
| 117 |
struct statvfs fs; |
| 118 |
#endif |
| 119 |
#if defined(LINUX) || defined(CYGWIN) |
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struct mntent *mp; |
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struct statfs fs; |
| 122 |
#endif |
| 123 |
#ifdef ALLBSD |
| 124 |
int nummnt; |
| 125 |
struct statfs *mp; |
| 126 |
#endif |
| 127 |
|
| 128 |
#ifdef ALLBSD |
| 129 |
nummnt=getmntinfo(&mp , MNT_LOCAL); |
| 130 |
if (nummnt<=0){ |
| 131 |
return NULL; |
| 132 |
} |
| 133 |
for(;nummnt--; mp++){ |
| 134 |
valid_type = is_valid_fs_type(mp->f_fstypename); |
| 135 |
#endif |
| 136 |
|
| 137 |
#if defined(LINUX) || defined(CYGWIN) |
| 138 |
if ((f=setmntent("/etc/mtab", "r" ))==NULL){ |
| 139 |
return NULL; |
| 140 |
} |
| 141 |
|
| 142 |
while((mp=getmntent(f))){ |
| 143 |
if((statfs(mp->mnt_dir, &fs)) !=0){ |
| 144 |
continue; |
| 145 |
} |
| 146 |
|
| 147 |
valid_type = is_valid_fs_type(mp->mnt_type); |
| 148 |
#endif |
| 149 |
|
| 150 |
#ifdef SOLARIS |
| 151 |
if ((f=fopen("/etc/mnttab", "r" ))==NULL){ |
| 152 |
return NULL; |
| 153 |
} |
| 154 |
while((getmntent(f, &mp)) == 0){ |
| 155 |
if ((statvfs(mp.mnt_mountp, &fs)) !=0){ |
| 156 |
continue; |
| 157 |
} |
| 158 |
valid_type = is_valid_fs_type(mp.mnt_fstype); |
| 159 |
#endif |
| 160 |
|
| 161 |
if(valid_type){ |
| 162 |
if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) { |
| 163 |
return NULL; |
| 164 |
} |
| 165 |
disk_ptr=disk_stats+num_disks; |
| 166 |
|
| 167 |
#ifdef ALLBSD |
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if (sg_update_string(&disk_ptr->device_name, mp->f_mntfromname) < 0) { |
| 169 |
return NULL; |
| 170 |
} |
| 171 |
if (sg_update_string(&disk_ptr->fs_type, mp->f_fstypename) < 0) { |
| 172 |
return NULL; |
| 173 |
} |
| 174 |
if (sg_update_string(&disk_ptr->mnt_point, mp->f_mntonname) < 0) { |
| 175 |
return NULL; |
| 176 |
} |
| 177 |
|
| 178 |
disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks; |
| 179 |
disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail; |
| 180 |
disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree); |
| 181 |
|
| 182 |
disk_ptr->total_inodes=(long long)mp->f_files; |
| 183 |
disk_ptr->free_inodes=(long long)mp->f_ffree; |
| 184 |
/* Freebsd doesn't have a "available" inodes */ |
| 185 |
disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes; |
| 186 |
#endif |
| 187 |
#if defined(LINUX) || defined(CYGWIN) |
| 188 |
if (sg_update_string(&disk_ptr->device_name, mp->mnt_fsname) < 0) { |
| 189 |
return NULL; |
| 190 |
} |
| 191 |
|
| 192 |
if (sg_update_string(&disk_ptr->fs_type, mp->mnt_type) < 0) { |
| 193 |
return NULL; |
| 194 |
} |
| 195 |
|
| 196 |
if (sg_update_string(&disk_ptr->mnt_point, mp->mnt_dir) < 0) { |
| 197 |
return NULL; |
| 198 |
} |
| 199 |
disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks; |
| 200 |
disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail; |
| 201 |
disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree); |
| 202 |
|
| 203 |
disk_ptr->total_inodes=(long long)fs.f_files; |
| 204 |
disk_ptr->free_inodes=(long long)fs.f_ffree; |
| 205 |
/* Linux doesn't have a "available" inodes */ |
| 206 |
disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes; |
| 207 |
#endif |
| 208 |
|
| 209 |
#ifdef SOLARIS |
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/* Maybe make this char[bigenough] and do strncpy's and put a null in the end? |
| 211 |
* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob |
| 212 |
* be upwards of a k each |
| 213 |
*/ |
| 214 |
if (sg_update_string(&disk_ptr->device_name, mp.mnt_special) < 0) { |
| 215 |
return NULL; |
| 216 |
} |
| 217 |
|
| 218 |
if (sg_update_string(&disk_ptr->fs_type, mp.mnt_fstype) < 0) { |
| 219 |
return NULL; |
| 220 |
} |
| 221 |
|
| 222 |
if (sg_update_string(&disk_ptr->mnt_point, mp.mnt_mountp) < 0) { |
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return NULL; |
| 224 |
} |
| 225 |
|
| 226 |
disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks; |
| 227 |
disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail; |
| 228 |
disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_frsize * (long long)fs.f_bfree); |
| 229 |
|
| 230 |
disk_ptr->total_inodes=(long long)fs.f_files; |
| 231 |
disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree; |
| 232 |
disk_ptr->free_inodes=(long long)fs.f_favail; |
| 233 |
#endif |
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num_disks++; |
| 235 |
} |
| 236 |
} |
| 237 |
|
| 238 |
*entries=num_disks; |
| 239 |
|
| 240 |
/* If this fails, there is very little i can do about it, so |
| 241 |
I'll ignore it :) */ |
| 242 |
#if defined(LINUX) || defined(CYGWIN) |
| 243 |
endmntent(f); |
| 244 |
#endif |
| 245 |
#if defined(SOLARIS) |
| 246 |
fclose(f); |
| 247 |
#endif |
| 248 |
|
| 249 |
return disk_stats; |
| 250 |
|
| 251 |
} |
| 252 |
|
| 253 |
static void diskio_stat_init(sg_disk_io_stats *d) { |
| 254 |
d->disk_name = NULL; |
| 255 |
} |
| 256 |
|
| 257 |
static void diskio_stat_destroy(sg_disk_io_stats *d) { |
| 258 |
free(d->disk_name); |
| 259 |
} |
| 260 |
|
| 261 |
VECTOR_DECLARE_STATIC(diskio_stats, sg_disk_io_stats, 10, |
| 262 |
diskio_stat_init, diskio_stat_destroy); |
| 263 |
|
| 264 |
#ifdef LINUX |
| 265 |
typedef struct { |
| 266 |
int major; |
| 267 |
int minor; |
| 268 |
} partition; |
| 269 |
#endif |
| 270 |
|
| 271 |
sg_disk_io_stats *sg_get_disk_io_stats(int *entries){ |
| 272 |
int num_diskio; |
| 273 |
#ifndef LINUX |
| 274 |
sg_disk_io_stats *diskio_stats_ptr; |
| 275 |
#endif |
| 276 |
|
| 277 |
#ifdef SOLARIS |
| 278 |
kstat_ctl_t *kc; |
| 279 |
kstat_t *ksp; |
| 280 |
kstat_io_t kios; |
| 281 |
#endif |
| 282 |
#ifdef LINUX |
| 283 |
FILE *f; |
| 284 |
char *line_ptr; |
| 285 |
int major, minor; |
| 286 |
int has_pp_stats = 1; |
| 287 |
VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL); |
| 288 |
int i, n; |
| 289 |
time_t now; |
| 290 |
const char *format; |
| 291 |
#endif |
| 292 |
#if defined(FREEBSD) || defined(DFBSD) |
| 293 |
static struct statinfo stats; |
| 294 |
static int stats_init = 0; |
| 295 |
int counter; |
| 296 |
struct device_selection *dev_sel = NULL; |
| 297 |
int n_selected, n_selections; |
| 298 |
long sel_gen; |
| 299 |
struct devstat *dev_ptr; |
| 300 |
#endif |
| 301 |
#ifdef NETBSD |
| 302 |
struct disk_sysctl *stats; |
| 303 |
#endif |
| 304 |
#ifdef OPENBSD |
| 305 |
int diskcount; |
| 306 |
char *disknames, *name, *bufpp; |
| 307 |
char **dk_name; |
| 308 |
struct diskstats *stats; |
| 309 |
#endif |
| 310 |
#ifdef NETBSD |
| 311 |
#define MIBSIZE 3 |
| 312 |
#endif |
| 313 |
#ifdef OPENBSD |
| 314 |
#define MIBSIZE 2 |
| 315 |
#endif |
| 316 |
#if defined(NETBSD) || defined(OPENBSD) |
| 317 |
int num_disks, i; |
| 318 |
int mib[MIBSIZE]; |
| 319 |
size_t size; |
| 320 |
#endif |
| 321 |
|
| 322 |
num_diskio=0; |
| 323 |
|
| 324 |
#ifdef OPENBSD |
| 325 |
mib[0] = CTL_HW; |
| 326 |
mib[1] = HW_DISKCOUNT; |
| 327 |
|
| 328 |
size = sizeof(diskcount); |
| 329 |
if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) { |
| 330 |
return NULL; |
| 331 |
} |
| 332 |
|
| 333 |
mib[0] = CTL_HW; |
| 334 |
mib[1] = HW_DISKNAMES; |
| 335 |
|
| 336 |
if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) { |
| 337 |
return NULL; |
| 338 |
} |
| 339 |
|
| 340 |
disknames = sg_malloc(size); |
| 341 |
if (disknames == NULL) { |
| 342 |
return NULL; |
| 343 |
} |
| 344 |
|
| 345 |
if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) { |
| 346 |
return NULL; |
| 347 |
} |
| 348 |
|
| 349 |
dk_name = sg_malloc(diskcount * sizeof(char *)); |
| 350 |
bufpp = disknames; |
| 351 |
for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) { |
| 352 |
dk_name[i] = name; |
| 353 |
} |
| 354 |
#endif |
| 355 |
|
| 356 |
#if defined(NETBSD) || defined(OPENBSD) |
| 357 |
mib[0] = CTL_HW; |
| 358 |
mib[1] = HW_DISKSTATS; |
| 359 |
#ifdef NETBSD |
| 360 |
mib[2] = sizeof(struct disk_sysctl); |
| 361 |
#endif |
| 362 |
|
| 363 |
if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) { |
| 364 |
return NULL; |
| 365 |
} |
| 366 |
|
| 367 |
#ifdef NETBSD |
| 368 |
num_disks = size / sizeof(struct disk_sysctl); |
| 369 |
#else |
| 370 |
num_disks = size / sizeof(struct diskstats); |
| 371 |
#endif |
| 372 |
|
| 373 |
stats = sg_malloc(size); |
| 374 |
if (stats == NULL) { |
| 375 |
return NULL; |
| 376 |
} |
| 377 |
|
| 378 |
if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) { |
| 379 |
return NULL; |
| 380 |
} |
| 381 |
|
| 382 |
for (i = 0; i < num_disks; i++) { |
| 383 |
const char *name; |
| 384 |
u_int64_t rbytes, wbytes; |
| 385 |
|
| 386 |
#ifdef NETBSD |
| 387 |
#ifdef HAVE_DK_RBYTES |
| 388 |
rbytes = stats[i].dk_rbytes; |
| 389 |
wbytes = stats[i].dk_wbytes; |
| 390 |
#else |
| 391 |
/* Before 1.7, NetBSD merged reads and writes. */ |
| 392 |
rbytes = wbytes = stats[i].dk_bytes; |
| 393 |
#endif |
| 394 |
#else |
| 395 |
rbytes = wbytes = stats[i].ds_bytes; |
| 396 |
#endif |
| 397 |
|
| 398 |
/* Don't keep stats for disks that have never been used. */ |
| 399 |
if (rbytes == 0 && wbytes == 0) { |
| 400 |
continue; |
| 401 |
} |
| 402 |
|
| 403 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 404 |
return NULL; |
| 405 |
} |
| 406 |
diskio_stats_ptr = diskio_stats + num_diskio; |
| 407 |
|
| 408 |
diskio_stats_ptr->read_bytes = rbytes; |
| 409 |
diskio_stats_ptr->write_bytes = wbytes; |
| 410 |
#ifdef NETBSD |
| 411 |
name = stats[i].dk_name; |
| 412 |
#else |
| 413 |
name = dk_name[i]; |
| 414 |
#endif |
| 415 |
if (sg_update_string(&diskio_stats_ptr->disk_name, name) < 0) { |
| 416 |
return NULL; |
| 417 |
} |
| 418 |
diskio_stats_ptr->systime = time(NULL); |
| 419 |
|
| 420 |
num_diskio++; |
| 421 |
} |
| 422 |
|
| 423 |
free(stats); |
| 424 |
#ifdef OPENBSD |
| 425 |
free(dk_name); |
| 426 |
free(disknames); |
| 427 |
#endif |
| 428 |
#endif |
| 429 |
|
| 430 |
#if defined(FREEBSD) || defined(DFBSD) |
| 431 |
if (!stats_init) { |
| 432 |
stats.dinfo=sg_malloc(sizeof(struct devinfo)); |
| 433 |
if(stats.dinfo==NULL) return NULL; |
| 434 |
bzero(stats.dinfo, sizeof(struct devinfo)); |
| 435 |
stats_init = 1; |
| 436 |
} |
| 437 |
#ifdef FREEBSD5 |
| 438 |
if ((devstat_getdevs(NULL, &stats)) < 0) return NULL; |
| 439 |
/* Not aware of a get all devices, so i said 999. If we ever |
| 440 |
* find a machine with more than 999 disks, then i'll change |
| 441 |
* this number :) |
| 442 |
*/ |
| 443 |
if (devstat_selectdevs(&dev_sel, &n_selected, &n_selections, &sel_gen, stats.dinfo->generation, stats.dinfo->devices, stats.dinfo->numdevs, NULL, 0, NULL, 0, DS_SELECT_ONLY, 999, 1) < 0) return NULL; |
| 444 |
#else |
| 445 |
if ((getdevs(&stats)) < 0) return NULL; |
| 446 |
/* Not aware of a get all devices, so i said 999. If we ever |
| 447 |
* find a machine with more than 999 disks, then i'll change |
| 448 |
* this number :) |
| 449 |
*/ |
| 450 |
if (selectdevs(&dev_sel, &n_selected, &n_selections, &sel_gen, stats.dinfo->generation, stats.dinfo->devices, stats.dinfo->numdevs, NULL, 0, NULL, 0, DS_SELECT_ONLY, 999, 1) < 0) return NULL; |
| 451 |
#endif |
| 452 |
|
| 453 |
for(counter=0;counter<stats.dinfo->numdevs;counter++){ |
| 454 |
dev_ptr=&stats.dinfo->devices[dev_sel[counter].position]; |
| 455 |
|
| 456 |
/* Throw away devices that have done nothing, ever.. Eg "odd" |
| 457 |
* devices.. like mem, proc.. and also doesn't report floppy |
| 458 |
* drives etc unless they are doing stuff :) |
| 459 |
*/ |
| 460 |
#ifdef FREEBSD5 |
| 461 |
if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue; |
| 462 |
#else |
| 463 |
if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue; |
| 464 |
#endif |
| 465 |
|
| 466 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 467 |
return NULL; |
| 468 |
} |
| 469 |
diskio_stats_ptr=diskio_stats+num_diskio; |
| 470 |
|
| 471 |
#ifdef FREEBSD5 |
| 472 |
diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ]; |
| 473 |
diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE]; |
| 474 |
#else |
| 475 |
diskio_stats_ptr->read_bytes=dev_ptr->bytes_read; |
| 476 |
diskio_stats_ptr->write_bytes=dev_ptr->bytes_written; |
| 477 |
#endif |
| 478 |
if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name); |
| 479 |
if (asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number) == -1) { |
| 480 |
return NULL; |
| 481 |
} |
| 482 |
diskio_stats_ptr->systime=time(NULL); |
| 483 |
|
| 484 |
num_diskio++; |
| 485 |
} |
| 486 |
free(dev_sel); |
| 487 |
|
| 488 |
#endif |
| 489 |
#ifdef SOLARIS |
| 490 |
if ((kc = kstat_open()) == NULL) { |
| 491 |
return NULL; |
| 492 |
} |
| 493 |
|
| 494 |
for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) { |
| 495 |
if (!strcmp(ksp->ks_class, "disk")) { |
| 496 |
|
| 497 |
if(ksp->ks_type != KSTAT_TYPE_IO) continue; |
| 498 |
/* We dont want metadevices appearins as num_diskio */ |
| 499 |
if(strcmp(ksp->ks_module, "md")==0) continue; |
| 500 |
if((kstat_read(kc, ksp, &kios))==-1){ |
| 501 |
} |
| 502 |
|
| 503 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 504 |
kstat_close(kc); |
| 505 |
return NULL; |
| 506 |
} |
| 507 |
diskio_stats_ptr=diskio_stats+num_diskio; |
| 508 |
|
| 509 |
diskio_stats_ptr->read_bytes=kios.nread; |
| 510 |
diskio_stats_ptr->write_bytes=kios.nwritten; |
| 511 |
if (sg_update_string(&diskio_stats_ptr->disk_name, |
| 512 |
sg_get_svr_from_bsd(ksp->ks_name)) < 0) { |
| 513 |
return NULL; |
| 514 |
} |
| 515 |
diskio_stats_ptr->systime=time(NULL); |
| 516 |
|
| 517 |
num_diskio++; |
| 518 |
} |
| 519 |
} |
| 520 |
|
| 521 |
kstat_close(kc); |
| 522 |
#endif |
| 523 |
|
| 524 |
#ifdef LINUX |
| 525 |
num_diskio = 0; |
| 526 |
n = 0; |
| 527 |
|
| 528 |
/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels |
| 529 |
have statistics in here too, so we can use those directly. |
| 530 |
2.6 kernels have /proc/diskstats instead with almost (but not quite) |
| 531 |
the same format. */ |
| 532 |
|
| 533 |
f = fopen("/proc/diskstats", "r"); |
| 534 |
format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld"; |
| 535 |
if (f == NULL) { |
| 536 |
f = fopen("/proc/partitions", "r"); |
| 537 |
format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld"; |
| 538 |
} |
| 539 |
if (f == NULL) goto out; |
| 540 |
now = time(NULL); |
| 541 |
|
| 542 |
while ((line_ptr = sg_f_read_line(f, "")) != NULL) { |
| 543 |
char name[100]; |
| 544 |
char *s; |
| 545 |
long long rsect, wsect; |
| 546 |
|
| 547 |
int nr = sscanf(line_ptr, format, |
| 548 |
&major, &minor, name, &rsect, &wsect); |
| 549 |
if (nr < 3) continue; |
| 550 |
|
| 551 |
/* Skip device names ending in numbers, since they're |
| 552 |
partitions. */ |
| 553 |
s = name; |
| 554 |
while (*s != '\0') s++; |
| 555 |
--s; |
| 556 |
if (*s >= '0' && *s <= '9') continue; |
| 557 |
|
| 558 |
if (nr < 5) { |
| 559 |
has_pp_stats = 0; |
| 560 |
rsect = 0; |
| 561 |
wsect = 0; |
| 562 |
} |
| 563 |
|
| 564 |
if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) { |
| 565 |
goto out; |
| 566 |
} |
| 567 |
if (VECTOR_RESIZE(parts, n + 1) < 0) { |
| 568 |
goto out; |
| 569 |
} |
| 570 |
|
| 571 |
if (sg_update_string(&diskio_stats[n].disk_name, name) < 0) { |
| 572 |
goto out; |
| 573 |
} |
| 574 |
diskio_stats[n].read_bytes = rsect * 512; |
| 575 |
diskio_stats[n].write_bytes = wsect * 512; |
| 576 |
diskio_stats[n].systime = now; |
| 577 |
parts[n].major = major; |
| 578 |
parts[n].minor = minor; |
| 579 |
|
| 580 |
n++; |
| 581 |
} |
| 582 |
|
| 583 |
fclose(f); |
| 584 |
f = NULL; |
| 585 |
|
| 586 |
if (!has_pp_stats) { |
| 587 |
/* This is an older kernel where /proc/partitions doesn't |
| 588 |
contain stats. Read what we can from /proc/stat instead, and |
| 589 |
fill in the appropriate bits of the list allocated above. */ |
| 590 |
|
| 591 |
f = fopen("/proc/stat", "r"); |
| 592 |
if (f == NULL) goto out; |
| 593 |
now = time(NULL); |
| 594 |
|
| 595 |
line_ptr = sg_f_read_line(f, "disk_io:"); |
| 596 |
if (line_ptr == NULL) goto out; |
| 597 |
|
| 598 |
while((line_ptr=strchr(line_ptr, ' '))!=NULL){ |
| 599 |
long long rsect, wsect; |
| 600 |
|
| 601 |
if (*++line_ptr == '\0') break; |
| 602 |
|
| 603 |
if((sscanf(line_ptr, |
| 604 |
"(%d,%d):(%*d, %*d, %lld, %*d, %lld)", |
| 605 |
&major, &minor, &rsect, &wsect)) != 4) { |
| 606 |
continue; |
| 607 |
} |
| 608 |
|
| 609 |
/* Find the corresponding device from earlier. |
| 610 |
Just to add to the fun, "minor" is actually the disk |
| 611 |
number, not the device minor, so we need to figure |
| 612 |
out the real minor number based on the major! |
| 613 |
This list is not exhaustive; if you're running |
| 614 |
an older kernel you probably don't have fancy |
| 615 |
I2O hardware anyway... */ |
| 616 |
switch (major) { |
| 617 |
case 3: |
| 618 |
case 21: |
| 619 |
case 22: |
| 620 |
case 33: |
| 621 |
case 34: |
| 622 |
case 36: |
| 623 |
case 56: |
| 624 |
case 57: |
| 625 |
case 88: |
| 626 |
case 89: |
| 627 |
case 90: |
| 628 |
case 91: |
| 629 |
minor *= 64; |
| 630 |
break; |
| 631 |
case 9: |
| 632 |
case 43: |
| 633 |
break; |
| 634 |
default: |
| 635 |
minor *= 16; |
| 636 |
break; |
| 637 |
} |
| 638 |
for (i = 0; i < n; i++) { |
| 639 |
if (major == parts[i].major |
| 640 |
&& minor == parts[i].minor) |
| 641 |
break; |
| 642 |
} |
| 643 |
if (i == n) continue; |
| 644 |
|
| 645 |
/* We read the number of blocks. Blocks are stored in |
| 646 |
512 bytes */ |
| 647 |
diskio_stats[i].read_bytes = rsect * 512; |
| 648 |
diskio_stats[i].write_bytes = wsect * 512; |
| 649 |
diskio_stats[i].systime = now; |
| 650 |
} |
| 651 |
} |
| 652 |
|
| 653 |
num_diskio = n; |
| 654 |
out: |
| 655 |
if (f != NULL) fclose(f); |
| 656 |
#endif |
| 657 |
|
| 658 |
#ifdef CYGWIN |
| 659 |
return NULL; |
| 660 |
#endif |
| 661 |
|
| 662 |
*entries=num_diskio; |
| 663 |
|
| 664 |
return diskio_stats; |
| 665 |
} |
| 666 |
|
| 667 |
sg_disk_io_stats *sg_get_disk_io_stats_diff(int *entries){ |
| 668 |
VECTOR_DECLARE_STATIC(diff, sg_disk_io_stats, 1, |
| 669 |
diskio_stat_init, diskio_stat_destroy); |
| 670 |
sg_disk_io_stats *src = NULL, *dest; |
| 671 |
int i, j, diff_count, new_count; |
| 672 |
|
| 673 |
if (diskio_stats == NULL) { |
| 674 |
/* No previous stats, so we can't calculate a difference. */ |
| 675 |
return sg_get_disk_io_stats(entries); |
| 676 |
} |
| 677 |
|
| 678 |
/* Resize the results array to match the previous stats. */ |
| 679 |
diff_count = VECTOR_SIZE(diskio_stats); |
| 680 |
if (VECTOR_RESIZE(diff, diff_count) < 0) { |
| 681 |
return NULL; |
| 682 |
} |
| 683 |
|
| 684 |
/* Copy the previous stats into the result. */ |
| 685 |
for (i = 0; i < diff_count; i++) { |
| 686 |
src = &diskio_stats[i]; |
| 687 |
dest = &diff[i]; |
| 688 |
|
| 689 |
if (sg_update_string(&dest->disk_name, src->disk_name) < 0) { |
| 690 |
return NULL; |
| 691 |
} |
| 692 |
dest->read_bytes = src->read_bytes; |
| 693 |
dest->write_bytes = src->write_bytes; |
| 694 |
dest->systime = src->systime; |
| 695 |
} |
| 696 |
|
| 697 |
/* Get a new set of stats. */ |
| 698 |
if (sg_get_disk_io_stats(&new_count) == NULL) { |
| 699 |
return NULL; |
| 700 |
} |
| 701 |
|
| 702 |
/* For each previous stat... */ |
| 703 |
for (i = 0; i < diff_count; i++) { |
| 704 |
dest = &diff[i]; |
| 705 |
|
| 706 |
/* ... find the corresponding new stat ... */ |
| 707 |
for (j = 0; j < new_count; j++) { |
| 708 |
/* Try the new stat in the same position first, |
| 709 |
since that's most likely to be it. */ |
| 710 |
src = &diskio_stats[(i + j) % new_count]; |
| 711 |
if (strcmp(src->disk_name, dest->disk_name) == 0) { |
| 712 |
break; |
| 713 |
} |
| 714 |
} |
| 715 |
if (j == new_count) { |
| 716 |
/* No match found. */ |
| 717 |
continue; |
| 718 |
} |
| 719 |
|
| 720 |
/* ... and subtract the previous stat from it to get the |
| 721 |
difference. */ |
| 722 |
dest->read_bytes = src->read_bytes - dest->read_bytes; |
| 723 |
dest->write_bytes = src->write_bytes - dest->write_bytes; |
| 724 |
dest->systime = src->systime - dest->systime; |
| 725 |
} |
| 726 |
|
| 727 |
*entries = diff_count; |
| 728 |
return diff; |
| 729 |
} |
| 730 |
|
