| 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 |
* |
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* $Id: disk_stats.c,v 1.86 2008/08/03 17:43:26 tdb 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", "vxfs", "nfs", "zfs"} |
| 41 |
#endif |
| 42 |
|
| 43 |
#if defined(LINUX) || defined(CYGWIN) |
| 44 |
#include <mntent.h> |
| 45 |
#include <sys/vfs.h> |
| 46 |
#include <sys/statvfs.h> |
| 47 |
#endif |
| 48 |
|
| 49 |
#ifdef LINUX |
| 50 |
#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \ |
| 51 |
"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \ |
| 52 |
"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \ |
| 53 |
"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \ |
| 54 |
"umsdos", "vfat", "xfs", "jfs", "nfs"} |
| 55 |
#endif |
| 56 |
|
| 57 |
#ifdef CYGWIN |
| 58 |
#define VALID_FS_TYPES {"user"} |
| 59 |
#endif |
| 60 |
|
| 61 |
#ifdef ALLBSD |
| 62 |
#include <sys/param.h> |
| 63 |
#include <sys/ucred.h> |
| 64 |
#include <sys/mount.h> |
| 65 |
#endif |
| 66 |
#if defined(FREEBSD) || defined(DFBSD) |
| 67 |
#include <sys/dkstat.h> |
| 68 |
#include <devstat.h> |
| 69 |
#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \ |
| 70 |
"ufs", "mfs", "nfs", "zfs"} |
| 71 |
#endif |
| 72 |
#if defined(NETBSD) || defined(OPENBSD) |
| 73 |
#include <sys/param.h> |
| 74 |
#include <sys/sysctl.h> |
| 75 |
#include <sys/disk.h> |
| 76 |
#define VALID_FS_TYPES {"ffs", "mfs", "msdos", "lfs", "adosfs", "ext2fs", \ |
| 77 |
"ntfs", "nfs"} |
| 78 |
#endif |
| 79 |
|
| 80 |
#ifdef HPUX |
| 81 |
#include <sys/param.h> |
| 82 |
#include <sys/pstat.h> |
| 83 |
#include <sys/types.h> |
| 84 |
#include <sys/stat.h> |
| 85 |
#include <sys/vfs.h> |
| 86 |
#include <mntent.h> |
| 87 |
#include <dirent.h> |
| 88 |
#include <stdio.h> |
| 89 |
#include <time.h> |
| 90 |
#define VALID_FS_TYPES {"vxfs", "hfs", "nfs"} |
| 91 |
#define DISK_BATCH 30 |
| 92 |
#endif |
| 93 |
|
| 94 |
#ifdef WIN32 |
| 95 |
#include "win32.h" |
| 96 |
/*#define VALID_FS_TYPES {"NTFS", "FAT", "FAT32"} unused*/ |
| 97 |
#define BUFSIZE 512 |
| 98 |
#endif |
| 99 |
|
| 100 |
#ifdef ALLBSD |
| 101 |
#define SG_MP_FSTYPENAME(mp) (mp)->f_fstypename |
| 102 |
#define SG_MP_DEVNAME(mp) (mp)->f_mntfromname |
| 103 |
#define SG_MP_MOUNTP(mp) (mp)->f_mntonname |
| 104 |
#define SG_FS_FRSIZE(fs) (long long) (*(fs))->f_bsize |
| 105 |
#define SG_FS_BSIZE(fs) (long long) (*(fs))->f_iosize |
| 106 |
#define SG_FS_BLOCKS(fs) (long long) (*(fs))->f_blocks |
| 107 |
#define SG_FS_BFREE(fs) (long long) (*(fs))->f_bfree |
| 108 |
#define SG_FS_BAVAIL(fs) (long long) (*(fs))->f_bavail |
| 109 |
#define SG_FS_FILES(fs) (long long) (*(fs))->f_files |
| 110 |
#define SG_FS_FFREE(fs) (long long) (*(fs))->f_ffree |
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#define SG_FS_FAVAIL(fs) -1LL |
| 112 |
#endif |
| 113 |
#if defined(LINUX) || defined(CYGWIN) || defined(HPUX) |
| 114 |
#define SG_MP_FSTYPENAME(mp) (mp)->mnt_type |
| 115 |
#define SG_MP_DEVNAME(mp) (mp)->mnt_fsname |
| 116 |
#define SG_MP_MOUNTP(mp) (mp)->mnt_dir |
| 117 |
#define SG_FS_FRSIZE(fs) (long long) (fs).f_frsize |
| 118 |
#define SG_FS_BSIZE(fs) (long long) (fs).f_bsize |
| 119 |
#define SG_FS_BLOCKS(fs) (long long) (fs).f_blocks |
| 120 |
#define SG_FS_BFREE(fs) (long long) (fs).f_bfree |
| 121 |
#define SG_FS_BAVAIL(fs) (long long) (fs).f_bavail |
| 122 |
#define SG_FS_FILES(fs) (long long) (fs).f_files |
| 123 |
#define SG_FS_FFREE(fs) (long long) (fs).f_ffree |
| 124 |
#define SG_FS_FAVAIL(fs) (long long) (fs).f_favail |
| 125 |
#endif |
| 126 |
#ifdef SOLARIS |
| 127 |
#define SG_MP_FSTYPENAME(mp) (mp).mnt_fstype |
| 128 |
#define SG_MP_DEVNAME(mp) (mp).mnt_special |
| 129 |
#define SG_MP_MOUNTP(mp) (mp).mnt_mountp |
| 130 |
#define SG_FS_FRSIZE(fs) (long long) (fs).f_frsize |
| 131 |
#define SG_FS_BSIZE(fs) (long long) (fs).f_bsize |
| 132 |
#define SG_FS_BLOCKS(fs) (long long) (fs).f_blocks |
| 133 |
#define SG_FS_BFREE(fs) (long long) (fs).f_bfree |
| 134 |
#define SG_FS_BAVAIL(fs) (long long) (fs).f_bavail |
| 135 |
#define SG_FS_FILES(fs) (long long) (fs).f_files |
| 136 |
#define SG_FS_FFREE(fs) (long long) (fs).f_ffree |
| 137 |
#define SG_FS_FAVAIL(fs) (long long) (fs).f_favail |
| 138 |
#endif |
| 139 |
|
| 140 |
static void disk_stat_init(sg_fs_stats *d) { |
| 141 |
d->device_name = NULL; |
| 142 |
d->fs_type = NULL; |
| 143 |
d->mnt_point = NULL; |
| 144 |
} |
| 145 |
|
| 146 |
static void disk_stat_destroy(sg_fs_stats *d) { |
| 147 |
free(d->device_name); |
| 148 |
free(d->fs_type); |
| 149 |
free(d->mnt_point); |
| 150 |
} |
| 151 |
|
| 152 |
#ifndef WIN32 /* not used by WIN32, so stop compiler throwing warnings */ |
| 153 |
static int is_valid_fs_type(const char *type) { |
| 154 |
const char *types[] = VALID_FS_TYPES; |
| 155 |
int i; |
| 156 |
|
| 157 |
for (i = 0; i < (int) (sizeof types / sizeof *types); i++) { |
| 158 |
if (strcmp(types[i], type) == 0) { |
| 159 |
return 1; |
| 160 |
} |
| 161 |
} |
| 162 |
return 0; |
| 163 |
} |
| 164 |
#endif |
| 165 |
|
| 166 |
sg_fs_stats *sg_get_fs_stats(int *entries){ |
| 167 |
VECTOR_DECLARE_STATIC(disk_stats, sg_fs_stats, 10, |
| 168 |
disk_stat_init, disk_stat_destroy); |
| 169 |
|
| 170 |
int num_disks=0; |
| 171 |
#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN) || defined(HPUX) |
| 172 |
FILE *f; |
| 173 |
#endif |
| 174 |
|
| 175 |
sg_fs_stats *disk_ptr; |
| 176 |
|
| 177 |
#ifdef SOLARIS |
| 178 |
struct mnttab mp; |
| 179 |
struct statvfs fs; |
| 180 |
#endif |
| 181 |
#if defined(LINUX) || defined(CYGWIN) || defined(HPUX) |
| 182 |
struct mntent *mp; |
| 183 |
struct statvfs fs; |
| 184 |
#endif |
| 185 |
#ifdef ALLBSD |
| 186 |
int nummnt; |
| 187 |
#ifdef HAVE_STATVFS |
| 188 |
struct statvfs *mp, **fs; |
| 189 |
#else |
| 190 |
struct statfs *mp, **fs; |
| 191 |
#endif |
| 192 |
#endif |
| 193 |
#ifdef WIN32 |
| 194 |
char lp_buf[MAX_PATH]; |
| 195 |
char volume_name_buf[BUFSIZE]; |
| 196 |
char filesys_name_buf[BUFSIZE]; |
| 197 |
char drive[4] = " :\\"; |
| 198 |
char *p; |
| 199 |
lp_buf[0]='\0'; |
| 200 |
#endif |
| 201 |
|
| 202 |
#ifdef ALLBSD |
| 203 |
nummnt=getmntinfo(&mp, MNT_WAIT); |
| 204 |
if (nummnt<=0){ |
| 205 |
sg_set_error_with_errno(SG_ERROR_GETMNTINFO, NULL); |
| 206 |
return NULL; |
| 207 |
} |
| 208 |
for(fs = ∓ nummnt--; (*fs)++){ |
| 209 |
#endif |
| 210 |
|
| 211 |
#if defined(LINUX) || defined(CYGWIN) || defined(HPUX) |
| 212 |
#ifdef MNT_MNTTAB |
| 213 |
if ((f=setmntent(MNT_MNTTAB, "r" ))==NULL){ |
| 214 |
#else |
| 215 |
if ((f=setmntent("/etc/mtab", "r" ))==NULL){ |
| 216 |
#endif |
| 217 |
sg_set_error(SG_ERROR_SETMNTENT, NULL); |
| 218 |
return NULL; |
| 219 |
} |
| 220 |
|
| 221 |
while((mp=getmntent(f))){ |
| 222 |
if((statvfs(mp->mnt_dir, &fs)) !=0){ |
| 223 |
continue; |
| 224 |
} |
| 225 |
|
| 226 |
#endif |
| 227 |
|
| 228 |
#ifdef SOLARIS |
| 229 |
if ((f=fopen("/etc/mnttab", "r" ))==NULL){ |
| 230 |
sg_set_error_with_errno(SG_ERROR_OPEN, "/etc/mnttab"); |
| 231 |
return NULL; |
| 232 |
} |
| 233 |
while((getmntent(f, &mp)) == 0){ |
| 234 |
if ((statvfs(mp.mnt_mountp, &fs)) !=0){ |
| 235 |
continue; |
| 236 |
} |
| 237 |
#endif |
| 238 |
|
| 239 |
#ifdef WIN32 |
| 240 |
if (!(GetLogicalDriveStrings(BUFSIZE-1, lp_buf))) { |
| 241 |
sg_set_error(SG_ERROR_GETMNTINFO, "GetLogicalDriveStrings"); |
| 242 |
return NULL; |
| 243 |
} |
| 244 |
p = lp_buf; |
| 245 |
do { |
| 246 |
// Copy drive letter to template string |
| 247 |
*drive = *p; |
| 248 |
// Only interested in harddrives. |
| 249 |
int drive_type = GetDriveType(drive); |
| 250 |
|
| 251 |
if(drive_type == DRIVE_FIXED) { |
| 252 |
#else |
| 253 |
if(is_valid_fs_type(SG_MP_FSTYPENAME(mp))){ |
| 254 |
#endif |
| 255 |
if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) { |
| 256 |
return NULL; |
| 257 |
} |
| 258 |
disk_ptr=disk_stats+num_disks; |
| 259 |
|
| 260 |
#ifndef WIN32 |
| 261 |
/* Maybe make this char[bigenough] and do strncpy's and put a null in the end? |
| 262 |
* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob |
| 263 |
* be upwards of a k each |
| 264 |
*/ |
| 265 |
if (sg_update_string(&disk_ptr->device_name, SG_MP_DEVNAME(mp)) < 0) { |
| 266 |
return NULL; |
| 267 |
} |
| 268 |
if (sg_update_string(&disk_ptr->fs_type, SG_MP_FSTYPENAME(mp)) < 0) { |
| 269 |
return NULL; |
| 270 |
} |
| 271 |
if (sg_update_string(&disk_ptr->mnt_point, SG_MP_MOUNTP(mp)) < 0) { |
| 272 |
return NULL; |
| 273 |
} |
| 274 |
|
| 275 |
disk_ptr->size = SG_FS_FRSIZE(fs) * SG_FS_BLOCKS(fs); |
| 276 |
disk_ptr->avail = SG_FS_FRSIZE(fs) * SG_FS_BAVAIL(fs); |
| 277 |
disk_ptr->used = (disk_ptr->size) - (SG_FS_FRSIZE(fs) * SG_FS_BFREE(fs)); |
| 278 |
|
| 279 |
disk_ptr->total_inodes = SG_FS_FILES(fs); |
| 280 |
disk_ptr->free_inodes = SG_FS_FFREE(fs); |
| 281 |
/* Linux, FreeBSD don't have a "available" inodes */ |
| 282 |
disk_ptr->used_inodes = disk_ptr->total_inodes - disk_ptr->free_inodes; |
| 283 |
disk_ptr->avail_inodes = SG_FS_FAVAIL(fs); |
| 284 |
|
| 285 |
disk_ptr->io_size = SG_FS_BSIZE(fs); |
| 286 |
disk_ptr->block_size = SG_FS_FRSIZE(fs); |
| 287 |
disk_ptr->total_blocks = SG_FS_BLOCKS(fs); |
| 288 |
disk_ptr->free_blocks = SG_FS_BFREE(fs); |
| 289 |
disk_ptr->avail_blocks = SG_FS_BAVAIL(fs); |
| 290 |
disk_ptr->used_blocks = disk_ptr->total_blocks - disk_ptr->free_blocks; |
| 291 |
#else |
| 292 |
if(!GetVolumeInformation(drive, volume_name_buf, BUFSIZE, |
| 293 |
NULL, NULL, NULL, |
| 294 |
filesys_name_buf, BUFSIZE)) { |
| 295 |
sg_set_error_with_errno(SG_ERROR_DISKINFO, |
| 296 |
"GetVolumeInformation"); |
| 297 |
return NULL; |
| 298 |
} |
| 299 |
|
| 300 |
if (sg_update_string(&disk_ptr->device_name, |
| 301 |
volume_name_buf) < 0) { |
| 302 |
return NULL; |
| 303 |
} |
| 304 |
if (sg_update_string(&disk_ptr->fs_type, |
| 305 |
filesys_name_buf) < 0) { |
| 306 |
return NULL; |
| 307 |
} |
| 308 |
if (sg_update_string(&disk_ptr->mnt_point, |
| 309 |
drive) < 0) { |
| 310 |
return NULL; |
| 311 |
} |
| 312 |
if (!GetDiskFreeSpaceEx(drive, NULL, |
| 313 |
(PULARGE_INTEGER)&disk_ptr->size, |
| 314 |
(PULARGE_INTEGER)&disk_ptr->avail)) { |
| 315 |
sg_set_error_with_errno(SG_ERROR_DISKINFO, |
| 316 |
"GetDiskFreeSpaceEx"); |
| 317 |
return NULL; |
| 318 |
} |
| 319 |
disk_ptr->used = disk_ptr->size - disk_ptr->avail; |
| 320 |
disk_ptr->total_inodes = 0; |
| 321 |
disk_ptr->free_inodes = 0; |
| 322 |
disk_ptr->used_inodes = 0; |
| 323 |
disk_ptr->avail_inodes = 0; |
| 324 |
|
| 325 |
/* I dunno what to do with these... so have nothing */ |
| 326 |
disk_ptr->io_size = 0; |
| 327 |
disk_ptr->block_size = 0; |
| 328 |
disk_ptr->total_blocks = 0; |
| 329 |
disk_ptr->free_blocks = 0; |
| 330 |
disk_ptr->avail_blocks = 0; |
| 331 |
disk_ptr->used_blocks = 0; |
| 332 |
#endif |
| 333 |
num_disks++; |
| 334 |
} |
| 335 |
#ifdef WIN32 |
| 336 |
while(*p++); |
| 337 |
} while(*p); |
| 338 |
#else |
| 339 |
} |
| 340 |
#endif |
| 341 |
|
| 342 |
*entries=num_disks; |
| 343 |
|
| 344 |
/* If this fails, there is very little i can do about it, so |
| 345 |
I'll ignore it :) */ |
| 346 |
#if defined(LINUX) || defined(CYGWIN) || defined(HPUX) |
| 347 |
endmntent(f); |
| 348 |
#endif |
| 349 |
#if defined(SOLARIS) |
| 350 |
fclose(f); |
| 351 |
#endif |
| 352 |
|
| 353 |
return disk_stats; |
| 354 |
|
| 355 |
} |
| 356 |
|
| 357 |
int sg_fs_compare_device_name(const void *va, const void *vb) { |
| 358 |
const sg_fs_stats *a = (const sg_fs_stats *)va; |
| 359 |
const sg_fs_stats *b = (const sg_fs_stats *)vb; |
| 360 |
|
| 361 |
return strcmp(a->device_name, b->device_name); |
| 362 |
} |
| 363 |
|
| 364 |
int sg_fs_compare_mnt_point(const void *va, const void *vb) { |
| 365 |
const sg_fs_stats *a = (const sg_fs_stats *)va; |
| 366 |
const sg_fs_stats *b = (const sg_fs_stats *)vb; |
| 367 |
|
| 368 |
return strcmp(a->mnt_point, b->mnt_point); |
| 369 |
} |
| 370 |
|
| 371 |
static void diskio_stat_init(sg_disk_io_stats *d) { |
| 372 |
d->disk_name = NULL; |
| 373 |
} |
| 374 |
|
| 375 |
static void diskio_stat_destroy(sg_disk_io_stats *d) { |
| 376 |
free(d->disk_name); |
| 377 |
} |
| 378 |
|
| 379 |
VECTOR_DECLARE_STATIC(diskio_stats, sg_disk_io_stats, 10, |
| 380 |
diskio_stat_init, diskio_stat_destroy); |
| 381 |
|
| 382 |
#ifdef LINUX |
| 383 |
typedef struct { |
| 384 |
int major; |
| 385 |
int minor; |
| 386 |
} partition; |
| 387 |
#endif |
| 388 |
|
| 389 |
sg_disk_io_stats *sg_get_disk_io_stats(int *entries){ |
| 390 |
int num_diskio; |
| 391 |
#ifndef LINUX |
| 392 |
sg_disk_io_stats *diskio_stats_ptr; |
| 393 |
#endif |
| 394 |
|
| 395 |
#ifdef HPUX |
| 396 |
long long rbytes = 0, wbytes = 0; |
| 397 |
struct dirent *dinfo = NULL; |
| 398 |
struct stat lstatinfo; |
| 399 |
struct pst_diskinfo pstat_diskinfo[DISK_BATCH]; |
| 400 |
char fullpathbuf[1024] = {0}; |
| 401 |
dev_t diskid; |
| 402 |
DIR *dh = NULL; |
| 403 |
int diskidx = 0; |
| 404 |
int num, i; |
| 405 |
#endif |
| 406 |
#ifdef SOLARIS |
| 407 |
kstat_ctl_t *kc; |
| 408 |
kstat_t *ksp; |
| 409 |
kstat_io_t kios; |
| 410 |
#endif |
| 411 |
#ifdef LINUX |
| 412 |
FILE *f; |
| 413 |
char *line_ptr; |
| 414 |
int major, minor; |
| 415 |
int has_pp_stats = 1; |
| 416 |
VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL); |
| 417 |
int i, n; |
| 418 |
time_t now; |
| 419 |
const char *format; |
| 420 |
static regex_t not_part_re, part_re; |
| 421 |
static int re_compiled = 0; |
| 422 |
#endif |
| 423 |
#if defined(FREEBSD) || defined(DFBSD) |
| 424 |
static struct statinfo stats; |
| 425 |
static int stats_init = 0; |
| 426 |
int counter; |
| 427 |
struct device_selection *dev_sel = NULL; |
| 428 |
int n_selected, n_selections; |
| 429 |
long sel_gen; |
| 430 |
struct devstat *dev_ptr; |
| 431 |
#endif |
| 432 |
#ifdef NETBSD |
| 433 |
struct disk_sysctl *stats; |
| 434 |
#endif |
| 435 |
#ifdef OPENBSD |
| 436 |
int diskcount; |
| 437 |
char *disknames, *name, *bufpp; |
| 438 |
char **dk_name; |
| 439 |
struct diskstats *stats; |
| 440 |
#endif |
| 441 |
#ifdef NETBSD |
| 442 |
#define MIBSIZE 3 |
| 443 |
#endif |
| 444 |
#ifdef OPENBSD |
| 445 |
#define MIBSIZE 2 |
| 446 |
#endif |
| 447 |
#if defined(NETBSD) || defined(OPENBSD) |
| 448 |
int num_disks, i; |
| 449 |
int mib[MIBSIZE]; |
| 450 |
size_t size; |
| 451 |
#endif |
| 452 |
#ifdef WIN32 |
| 453 |
char *name; |
| 454 |
long long rbytes; |
| 455 |
long long wbytes; |
| 456 |
#endif |
| 457 |
|
| 458 |
num_diskio=0; |
| 459 |
|
| 460 |
#ifdef HPUX |
| 461 |
while (1) { |
| 462 |
num = pstat_getdisk(pstat_diskinfo, sizeof pstat_diskinfo[0], |
| 463 |
DISK_BATCH, diskidx); |
| 464 |
if (num == -1) { |
| 465 |
sg_set_error_with_errno(SG_ERROR_PSTAT, |
| 466 |
"pstat_getdisk"); |
| 467 |
return NULL; |
| 468 |
} else if (num == 0) { |
| 469 |
break; |
| 470 |
} |
| 471 |
|
| 472 |
for (i = 0; i < num; i++) { |
| 473 |
struct pst_diskinfo *di = &pstat_diskinfo[i]; |
| 474 |
|
| 475 |
/* Skip "disabled" disks. */ |
| 476 |
if (di->psd_status == 0) { |
| 477 |
continue; |
| 478 |
} |
| 479 |
|
| 480 |
/* We can't seperate the reads from the writes, we'll |
| 481 |
* just give the same to each. (This value is in |
| 482 |
* 64-byte chunks according to the pstat header file, |
| 483 |
* and can wrap to be negative.) |
| 484 |
*/ |
| 485 |
rbytes = wbytes = ((unsigned long) di->psd_dkwds) * 64LL; |
| 486 |
|
| 487 |
/* Skip unused disks. */ |
| 488 |
if (rbytes == 0 && wbytes == 0) { |
| 489 |
continue; |
| 490 |
} |
| 491 |
|
| 492 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 493 |
return NULL; |
| 494 |
} |
| 495 |
|
| 496 |
diskio_stats_ptr = diskio_stats + num_diskio; |
| 497 |
|
| 498 |
diskio_stats_ptr->read_bytes = rbytes; |
| 499 |
diskio_stats_ptr->write_bytes = wbytes; |
| 500 |
|
| 501 |
diskio_stats_ptr->systime = time(NULL); |
| 502 |
|
| 503 |
num_diskio++; |
| 504 |
|
| 505 |
/* FIXME This should use a static cache, like the Linux |
| 506 |
* code below. */ |
| 507 |
if (diskio_stats_ptr->disk_name == NULL) { |
| 508 |
dh = opendir("/dev/dsk"); |
| 509 |
if (dh == NULL) { |
| 510 |
continue; |
| 511 |
} |
| 512 |
|
| 513 |
diskid = (di->psd_dev.psd_major << 24) | di->psd_dev.psd_minor; |
| 514 |
while (1) { |
| 515 |
dinfo = readdir(dh); |
| 516 |
if (dinfo == NULL) { |
| 517 |
break; |
| 518 |
} |
| 519 |
snprintf(fullpathbuf, sizeof(fullpathbuf), "/dev/dsk/%s", dinfo->d_name); |
| 520 |
if (lstat(fullpathbuf, &lstatinfo) < 0) { |
| 521 |
continue; |
| 522 |
} |
| 523 |
|
| 524 |
if (lstatinfo.st_rdev == diskid) { |
| 525 |
if (sg_update_string(&diskio_stats_ptr->disk_name, dinfo->d_name) < 0) { |
| 526 |
return NULL; |
| 527 |
} |
| 528 |
break; |
| 529 |
} |
| 530 |
} |
| 531 |
closedir(dh); |
| 532 |
|
| 533 |
if (diskio_stats_ptr->disk_name == NULL) { |
| 534 |
if (sg_update_string(&diskio_stats_ptr->disk_name, di->psd_hw_path.psh_name) < 0) { |
| 535 |
return NULL; |
| 536 |
} |
| 537 |
} |
| 538 |
} |
| 539 |
} |
| 540 |
diskidx = pstat_diskinfo[num - 1].psd_idx + 1; |
| 541 |
} |
| 542 |
#endif |
| 543 |
#ifdef OPENBSD |
| 544 |
mib[0] = CTL_HW; |
| 545 |
mib[1] = HW_DISKCOUNT; |
| 546 |
|
| 547 |
size = sizeof(diskcount); |
| 548 |
if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) { |
| 549 |
sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKCOUNT"); |
| 550 |
return NULL; |
| 551 |
} |
| 552 |
|
| 553 |
mib[0] = CTL_HW; |
| 554 |
mib[1] = HW_DISKNAMES; |
| 555 |
|
| 556 |
if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) { |
| 557 |
sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKNAMES"); |
| 558 |
return NULL; |
| 559 |
} |
| 560 |
|
| 561 |
disknames = sg_malloc(size); |
| 562 |
if (disknames == NULL) { |
| 563 |
return NULL; |
| 564 |
} |
| 565 |
|
| 566 |
if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) { |
| 567 |
sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKNAMES"); |
| 568 |
return NULL; |
| 569 |
} |
| 570 |
|
| 571 |
dk_name = sg_malloc(diskcount * sizeof(char *)); |
| 572 |
bufpp = disknames; |
| 573 |
for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) { |
| 574 |
dk_name[i] = name; |
| 575 |
} |
| 576 |
#endif |
| 577 |
|
| 578 |
#if defined(NETBSD) || defined(OPENBSD) |
| 579 |
mib[0] = CTL_HW; |
| 580 |
mib[1] = HW_DISKSTATS; |
| 581 |
#ifdef NETBSD |
| 582 |
mib[2] = sizeof(struct disk_sysctl); |
| 583 |
#endif |
| 584 |
|
| 585 |
if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) { |
| 586 |
sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKSTATS"); |
| 587 |
return NULL; |
| 588 |
} |
| 589 |
|
| 590 |
#ifdef NETBSD |
| 591 |
num_disks = size / sizeof(struct disk_sysctl); |
| 592 |
#else |
| 593 |
num_disks = size / sizeof(struct diskstats); |
| 594 |
#endif |
| 595 |
|
| 596 |
stats = sg_malloc(size); |
| 597 |
if (stats == NULL) { |
| 598 |
return NULL; |
| 599 |
} |
| 600 |
|
| 601 |
if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) { |
| 602 |
sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKSTATS"); |
| 603 |
return NULL; |
| 604 |
} |
| 605 |
|
| 606 |
for (i = 0; i < num_disks; i++) { |
| 607 |
const char *name; |
| 608 |
u_int64_t rbytes, wbytes; |
| 609 |
|
| 610 |
#ifdef NETBSD |
| 611 |
#ifdef HAVE_DK_RBYTES |
| 612 |
rbytes = stats[i].dk_rbytes; |
| 613 |
wbytes = stats[i].dk_wbytes; |
| 614 |
#else |
| 615 |
/* Before 2.0, NetBSD merged reads and writes. */ |
| 616 |
rbytes = wbytes = stats[i].dk_bytes; |
| 617 |
#endif |
| 618 |
#else |
| 619 |
#ifdef HAVE_DS_RBYTES |
| 620 |
rbytes = stats[i].ds_rbytes; |
| 621 |
wbytes = stats[i].ds_wbytes; |
| 622 |
#else |
| 623 |
/* Before 3.5, OpenBSD merged reads and writes */ |
| 624 |
rbytes = wbytes = stats[i].ds_bytes; |
| 625 |
#endif |
| 626 |
#endif |
| 627 |
|
| 628 |
/* Don't keep stats for disks that have never been used. */ |
| 629 |
if (rbytes == 0 && wbytes == 0) { |
| 630 |
continue; |
| 631 |
} |
| 632 |
|
| 633 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 634 |
return NULL; |
| 635 |
} |
| 636 |
diskio_stats_ptr = diskio_stats + num_diskio; |
| 637 |
|
| 638 |
diskio_stats_ptr->read_bytes = rbytes; |
| 639 |
diskio_stats_ptr->write_bytes = wbytes; |
| 640 |
#ifdef NETBSD |
| 641 |
name = stats[i].dk_name; |
| 642 |
#else |
| 643 |
name = dk_name[i]; |
| 644 |
#endif |
| 645 |
if (sg_update_string(&diskio_stats_ptr->disk_name, name) < 0) { |
| 646 |
return NULL; |
| 647 |
} |
| 648 |
diskio_stats_ptr->systime = time(NULL); |
| 649 |
|
| 650 |
num_diskio++; |
| 651 |
} |
| 652 |
|
| 653 |
free(stats); |
| 654 |
#ifdef OPENBSD |
| 655 |
free(dk_name); |
| 656 |
free(disknames); |
| 657 |
#endif |
| 658 |
#endif |
| 659 |
|
| 660 |
#if defined(FREEBSD) || defined(DFBSD) |
| 661 |
if (!stats_init) { |
| 662 |
stats.dinfo=sg_malloc(sizeof(struct devinfo)); |
| 663 |
if(stats.dinfo==NULL) return NULL; |
| 664 |
bzero(stats.dinfo, sizeof(struct devinfo)); |
| 665 |
stats_init = 1; |
| 666 |
} |
| 667 |
#ifdef FREEBSD5 |
| 668 |
if ((devstat_getdevs(NULL, &stats)) < 0) { |
| 669 |
/* FIXME devstat functions return a string error in |
| 670 |
devstat_errbuf */ |
| 671 |
sg_set_error(SG_ERROR_DEVSTAT_GETDEVS, NULL); |
| 672 |
return NULL; |
| 673 |
} |
| 674 |
/* Not aware of a get all devices, so i said 999. If we ever |
| 675 |
* find a machine with more than 999 disks, then i'll change |
| 676 |
* this number :) |
| 677 |
*/ |
| 678 |
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) { |
| 679 |
sg_set_error(SG_ERROR_DEVSTAT_SELECTDEVS, NULL); |
| 680 |
return NULL; |
| 681 |
} |
| 682 |
#else |
| 683 |
if ((getdevs(&stats)) < 0) { |
| 684 |
sg_set_error(SG_ERROR_DEVSTAT_GETDEVS, NULL); |
| 685 |
return NULL; |
| 686 |
} |
| 687 |
/* Not aware of a get all devices, so i said 999. If we ever |
| 688 |
* find a machine with more than 999 disks, then i'll change |
| 689 |
* this number :) |
| 690 |
*/ |
| 691 |
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) { |
| 692 |
sg_set_error(SG_ERROR_DEVSTAT_SELECTDEVS, NULL); |
| 693 |
return NULL; |
| 694 |
} |
| 695 |
#endif |
| 696 |
|
| 697 |
for(counter=0;counter<stats.dinfo->numdevs;counter++){ |
| 698 |
dev_ptr=&stats.dinfo->devices[dev_sel[counter].position]; |
| 699 |
|
| 700 |
/* Throw away devices that have done nothing, ever.. Eg "odd" |
| 701 |
* devices.. like mem, proc.. and also doesn't report floppy |
| 702 |
* drives etc unless they are doing stuff :) |
| 703 |
*/ |
| 704 |
#ifdef FREEBSD5 |
| 705 |
if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue; |
| 706 |
#else |
| 707 |
if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue; |
| 708 |
#endif |
| 709 |
|
| 710 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 711 |
return NULL; |
| 712 |
} |
| 713 |
diskio_stats_ptr=diskio_stats+num_diskio; |
| 714 |
|
| 715 |
#ifdef FREEBSD5 |
| 716 |
diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ]; |
| 717 |
diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE]; |
| 718 |
#else |
| 719 |
diskio_stats_ptr->read_bytes=dev_ptr->bytes_read; |
| 720 |
diskio_stats_ptr->write_bytes=dev_ptr->bytes_written; |
| 721 |
#endif |
| 722 |
if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name); |
| 723 |
if (asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number) == -1) { |
| 724 |
sg_set_error_with_errno(SG_ERROR_ASPRINTF, NULL); |
| 725 |
return NULL; |
| 726 |
} |
| 727 |
diskio_stats_ptr->systime=time(NULL); |
| 728 |
|
| 729 |
num_diskio++; |
| 730 |
} |
| 731 |
free(dev_sel); |
| 732 |
|
| 733 |
#endif |
| 734 |
#ifdef SOLARIS |
| 735 |
if ((kc = kstat_open()) == NULL) { |
| 736 |
sg_set_error(SG_ERROR_KSTAT_OPEN, NULL); |
| 737 |
return NULL; |
| 738 |
} |
| 739 |
|
| 740 |
for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) { |
| 741 |
if (!strcmp(ksp->ks_class, "disk")) { |
| 742 |
|
| 743 |
if(ksp->ks_type != KSTAT_TYPE_IO) continue; |
| 744 |
/* We dont want metadevices appearins as num_diskio */ |
| 745 |
if(strcmp(ksp->ks_module, "md")==0) continue; |
| 746 |
if((kstat_read(kc, ksp, &kios))==-1){ |
| 747 |
} |
| 748 |
|
| 749 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
| 750 |
kstat_close(kc); |
| 751 |
return NULL; |
| 752 |
} |
| 753 |
diskio_stats_ptr=diskio_stats+num_diskio; |
| 754 |
|
| 755 |
diskio_stats_ptr->read_bytes=kios.nread; |
| 756 |
diskio_stats_ptr->write_bytes=kios.nwritten; |
| 757 |
if (sg_update_string(&diskio_stats_ptr->disk_name, |
| 758 |
sg_get_svr_from_bsd(ksp->ks_name)) < 0) { |
| 759 |
kstat_close(kc); |
| 760 |
return NULL; |
| 761 |
} |
| 762 |
diskio_stats_ptr->systime=time(NULL); |
| 763 |
|
| 764 |
num_diskio++; |
| 765 |
} |
| 766 |
} |
| 767 |
|
| 768 |
kstat_close(kc); |
| 769 |
#endif |
| 770 |
|
| 771 |
#ifdef LINUX |
| 772 |
num_diskio = 0; |
| 773 |
n = 0; |
| 774 |
|
| 775 |
/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels |
| 776 |
have statistics in here too, so we can use those directly. |
| 777 |
2.6 kernels have /proc/diskstats instead with almost (but not quite) |
| 778 |
the same format. */ |
| 779 |
|
| 780 |
f = fopen("/proc/diskstats", "r"); |
| 781 |
format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld"; |
| 782 |
if (f == NULL) { |
| 783 |
f = fopen("/proc/partitions", "r"); |
| 784 |
format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld"; |
| 785 |
} |
| 786 |
if (f == NULL) goto out; |
| 787 |
now = time(NULL); |
| 788 |
|
| 789 |
if (!re_compiled) { |
| 790 |
if (regcomp(&part_re, "^(.*/)?[^/]*[0-9]$", REG_EXTENDED | REG_NOSUB) != 0) { |
| 791 |
sg_set_error(SG_ERROR_PARSE, NULL); |
| 792 |
goto out; |
| 793 |
} |
| 794 |
if (regcomp(¬_part_re, "^(.*/)?[^/0-9]+[0-9]+d[0-9]+$", REG_EXTENDED | REG_NOSUB) != 0) { |
| 795 |
sg_set_error(SG_ERROR_PARSE, NULL); |
| 796 |
goto out; |
| 797 |
} |
| 798 |
re_compiled = 1; |
| 799 |
} |
| 800 |
|
| 801 |
while ((line_ptr = sg_f_read_line(f, "")) != NULL) { |
| 802 |
char name[100]; |
| 803 |
long long rsect, wsect; |
| 804 |
|
| 805 |
int nr = sscanf(line_ptr, format, |
| 806 |
&major, &minor, name, &rsect, &wsect); |
| 807 |
if (nr < 3) continue; |
| 808 |
|
| 809 |
/* Skip device names ending in numbers, since they're |
| 810 |
partitions, unless they match the c0d0 pattern that some |
| 811 |
RAID devices use. */ |
| 812 |
/* FIXME: For 2.6+, we should probably be using sysfs to detect |
| 813 |
this... */ |
| 814 |
if ((regexec(&part_re, name, 0, NULL, 0) == 0) |
| 815 |
&& (regexec(¬_part_re, name, 0, NULL, 0) != 0)) { |
| 816 |
continue; |
| 817 |
} |
| 818 |
|
| 819 |
if (nr < 5) { |
| 820 |
has_pp_stats = 0; |
| 821 |
rsect = 0; |
| 822 |
wsect = 0; |
| 823 |
} |
| 824 |
|
| 825 |
if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) { |
| 826 |
goto out; |
| 827 |
} |
| 828 |
if (VECTOR_RESIZE(parts, n + 1) < 0) { |
| 829 |
goto out; |
| 830 |
} |
| 831 |
|
| 832 |
if (sg_update_string(&diskio_stats[n].disk_name, name) < 0) { |
| 833 |
goto out; |
| 834 |
} |
| 835 |
diskio_stats[n].read_bytes = rsect * 512; |
| 836 |
diskio_stats[n].write_bytes = wsect * 512; |
| 837 |
diskio_stats[n].systime = now; |
| 838 |
parts[n].major = major; |
| 839 |
parts[n].minor = minor; |
| 840 |
|
| 841 |
n++; |
| 842 |
} |
| 843 |
|
| 844 |
fclose(f); |
| 845 |
f = NULL; |
| 846 |
|
| 847 |
if (!has_pp_stats) { |
| 848 |
/* This is an older kernel where /proc/partitions doesn't |
| 849 |
contain stats. Read what we can from /proc/stat instead, and |
| 850 |
fill in the appropriate bits of the list allocated above. */ |
| 851 |
|
| 852 |
f = fopen("/proc/stat", "r"); |
| 853 |
if (f == NULL) goto out; |
| 854 |
now = time(NULL); |
| 855 |
|
| 856 |
line_ptr = sg_f_read_line(f, "disk_io:"); |
| 857 |
if (line_ptr == NULL) goto out; |
| 858 |
|
| 859 |
while((line_ptr=strchr(line_ptr, ' '))!=NULL){ |
| 860 |
long long rsect, wsect; |
| 861 |
|
| 862 |
if (*++line_ptr == '\0') break; |
| 863 |
|
| 864 |
if((sscanf(line_ptr, |
| 865 |
"(%d,%d):(%*d, %*d, %lld, %*d, %lld)", |
| 866 |
&major, &minor, &rsect, &wsect)) != 4) { |
| 867 |
continue; |
| 868 |
} |
| 869 |
|
| 870 |
/* Find the corresponding device from earlier. |
| 871 |
Just to add to the fun, "minor" is actually the disk |
| 872 |
number, not the device minor, so we need to figure |
| 873 |
out the real minor number based on the major! |
| 874 |
This list is not exhaustive; if you're running |
| 875 |
an older kernel you probably don't have fancy |
| 876 |
I2O hardware anyway... */ |
| 877 |
switch (major) { |
| 878 |
case 3: |
| 879 |
case 21: |
| 880 |
case 22: |
| 881 |
case 33: |
| 882 |
case 34: |
| 883 |
case 36: |
| 884 |
case 56: |
| 885 |
case 57: |
| 886 |
case 88: |
| 887 |
case 89: |
| 888 |
case 90: |
| 889 |
case 91: |
| 890 |
minor *= 64; |
| 891 |
break; |
| 892 |
case 9: |
| 893 |
case 43: |
| 894 |
break; |
| 895 |
default: |
| 896 |
minor *= 16; |
| 897 |
break; |
| 898 |
} |
| 899 |
for (i = 0; i < n; i++) { |
| 900 |
if (major == parts[i].major |
| 901 |
&& minor == parts[i].minor) |
| 902 |
break; |
| 903 |
} |
| 904 |
if (i == n) continue; |
| 905 |
|
| 906 |
/* We read the number of blocks. Blocks are stored in |
| 907 |
512 bytes */ |
| 908 |
diskio_stats[i].read_bytes = rsect * 512; |
| 909 |
diskio_stats[i].write_bytes = wsect * 512; |
| 910 |
diskio_stats[i].systime = now; |
| 911 |
} |
| 912 |
} |
| 913 |
|
| 914 |
num_diskio = n; |
| 915 |
out: |
| 916 |
if (f != NULL) fclose(f); |
| 917 |
#endif |
| 918 |
|
| 919 |
#ifdef CYGWIN |
| 920 |
sg_set_error(SG_ERROR_UNSUPPORTED, "Cygwin"); |
| 921 |
return NULL; |
| 922 |
#endif |
| 923 |
|
| 924 |
#ifdef WIN32 |
| 925 |
sg_set_error(SG_ERROR_NONE, NULL); |
| 926 |
|
| 927 |
while((name = get_diskio(num_diskio, &rbytes, &wbytes)) != NULL) { |
| 928 |
if (VECTOR_RESIZE(diskio_stats, num_diskio+1)) { |
| 929 |
return NULL; |
| 930 |
} |
| 931 |
|
| 932 |
diskio_stats_ptr = diskio_stats + num_diskio; |
| 933 |
|
| 934 |
if (sg_update_string(&diskio_stats_ptr->disk_name, name) < 0) { |
| 935 |
return NULL; |
| 936 |
} |
| 937 |
sg_update_string(&name, NULL); |
| 938 |
diskio_stats_ptr->read_bytes = rbytes; |
| 939 |
diskio_stats_ptr->write_bytes = wbytes; |
| 940 |
|
| 941 |
diskio_stats_ptr->systime = 0; |
| 942 |
|
| 943 |
num_diskio++; |
| 944 |
} |
| 945 |
#endif |
| 946 |
|
| 947 |
*entries=num_diskio; |
| 948 |
|
| 949 |
return diskio_stats; |
| 950 |
} |
| 951 |
|
| 952 |
sg_disk_io_stats *sg_get_disk_io_stats_diff(int *entries){ |
| 953 |
#ifndef WIN32 |
| 954 |
VECTOR_DECLARE_STATIC(diff, sg_disk_io_stats, 1, |
| 955 |
diskio_stat_init, diskio_stat_destroy); |
| 956 |
sg_disk_io_stats *src = NULL, *dest; |
| 957 |
int i, j, diff_count, new_count; |
| 958 |
|
| 959 |
if (diskio_stats == NULL) { |
| 960 |
/* No previous stats, so we can't calculate a difference. */ |
| 961 |
return sg_get_disk_io_stats(entries); |
| 962 |
} |
| 963 |
|
| 964 |
/* Resize the results array to match the previous stats. */ |
| 965 |
diff_count = VECTOR_SIZE(diskio_stats); |
| 966 |
if (VECTOR_RESIZE(diff, diff_count) < 0) { |
| 967 |
return NULL; |
| 968 |
} |
| 969 |
|
| 970 |
/* Copy the previous stats into the result. */ |
| 971 |
for (i = 0; i < diff_count; i++) { |
| 972 |
src = &diskio_stats[i]; |
| 973 |
dest = &diff[i]; |
| 974 |
|
| 975 |
if (sg_update_string(&dest->disk_name, src->disk_name) < 0) { |
| 976 |
return NULL; |
| 977 |
} |
| 978 |
dest->read_bytes = src->read_bytes; |
| 979 |
dest->write_bytes = src->write_bytes; |
| 980 |
dest->systime = src->systime; |
| 981 |
} |
| 982 |
|
| 983 |
/* Get a new set of stats. */ |
| 984 |
if (sg_get_disk_io_stats(&new_count) == NULL) { |
| 985 |
return NULL; |
| 986 |
} |
| 987 |
|
| 988 |
/* For each previous stat... */ |
| 989 |
for (i = 0; i < diff_count; i++) { |
| 990 |
dest = &diff[i]; |
| 991 |
|
| 992 |
/* ... find the corresponding new stat ... */ |
| 993 |
for (j = 0; j < new_count; j++) { |
| 994 |
/* Try the new stat in the same position first, |
| 995 |
since that's most likely to be it. */ |
| 996 |
src = &diskio_stats[(i + j) % new_count]; |
| 997 |
if (strcmp(src->disk_name, dest->disk_name) == 0) { |
| 998 |
break; |
| 999 |
} |
| 1000 |
} |
| 1001 |
if (j == new_count) { |
| 1002 |
/* No match found. */ |
| 1003 |
continue; |
| 1004 |
} |
| 1005 |
|
| 1006 |
/* ... and subtract the previous stat from it to get the |
| 1007 |
difference. */ |
| 1008 |
dest->read_bytes = src->read_bytes - dest->read_bytes; |
| 1009 |
dest->write_bytes = src->write_bytes - dest->write_bytes; |
| 1010 |
dest->systime = src->systime - dest->systime; |
| 1011 |
} |
| 1012 |
|
| 1013 |
*entries = diff_count; |
| 1014 |
return diff; |
| 1015 |
#else /* WIN32 */ |
| 1016 |
return sg_get_disk_io_stats(entries); |
| 1017 |
#endif |
| 1018 |
} |
| 1019 |
|
| 1020 |
int sg_disk_io_compare_name(const void *va, const void *vb) { |
| 1021 |
const sg_disk_io_stats *a = (const sg_disk_io_stats *)va; |
| 1022 |
const sg_disk_io_stats *b = (const sg_disk_io_stats *)vb; |
| 1023 |
|
| 1024 |
return strcmp(a->disk_name, b->disk_name); |
| 1025 |
} |
| 1026 |
|
