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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2004 i-scream |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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* 02111-1307 USA |
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* |
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* $Id: disk_stats.c,v 1.57 2004/04/04 22:29:54 ats Exp $ |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
26 |
#endif |
27 |
|
28 |
#include <stdio.h> |
29 |
#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
32 |
#include "statgrab.h" |
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#include "vector.h" |
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|
35 |
#ifdef SOLARIS |
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#include <sys/mnttab.h> |
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#include <sys/statvfs.h> |
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#include <kstat.h> |
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#define VALID_FS_TYPES {"ufs", "tmpfs"} |
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#endif |
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|
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#if defined(LINUX) || defined(CYGWIN) |
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#include <mntent.h> |
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#include <sys/vfs.h> |
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#include "tools.h" |
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#endif |
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|
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#ifdef LINUX |
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#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \ |
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"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \ |
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"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \ |
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"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \ |
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"umsdos", "vfat", "xfs", "jfs"} |
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#endif |
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|
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#ifdef CYGWIN |
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#define VALID_FS_TYPES {"user"} |
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#endif |
59 |
|
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#ifdef ALLBSD |
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#include <sys/param.h> |
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#include <sys/ucred.h> |
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#include <sys/mount.h> |
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#endif |
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#if defined(FREEBSD) || defined(DFBSD) |
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#include <sys/dkstat.h> |
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#include <devstat.h> |
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#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \ |
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"ufs", "mfs"} |
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#endif |
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#if defined(NETBSD) || defined(OPENBSD) |
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#include <sys/param.h> |
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#include <sys/sysctl.h> |
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#include <sys/disk.h> |
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#define VALID_FS_TYPES {"ffs", "mfs", "msdos", "lfs", "adosfs", "ext2fs", \ |
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"ntfs"} |
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#endif |
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|
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static char *copy_string(char **dest, const char *src) { |
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char *new; |
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|
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new = realloc(*dest, strlen(src) + 1); |
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if (new == NULL) { |
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return NULL; |
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} |
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|
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strcpy(new, src); |
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*dest = new; |
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return new; |
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} |
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|
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static void disk_stat_init(disk_stat_t *d) { |
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d->device_name = NULL; |
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d->fs_type = NULL; |
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d->mnt_point = NULL; |
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} |
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|
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static void disk_stat_destroy(disk_stat_t *d) { |
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free(d->device_name); |
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free(d->fs_type); |
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free(d->mnt_point); |
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} |
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|
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int is_valid_fs_type(const char *type) { |
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const char *types[] = VALID_FS_TYPES; |
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int i; |
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|
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for (i = 0; i < (sizeof types / sizeof *types); i++) { |
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if (strcmp(types[i], type) == 0) { |
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return 1; |
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} |
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} |
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return 0; |
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} |
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|
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disk_stat_t *get_disk_stats(int *entries){ |
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VECTOR_DECLARE_STATIC(disk_stats, disk_stat_t, 10, |
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disk_stat_init, disk_stat_destroy); |
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|
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int valid_type; |
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int num_disks=0; |
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#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN) |
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FILE *f; |
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#endif |
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|
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disk_stat_t *disk_ptr; |
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|
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#ifdef SOLARIS |
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struct mnttab mp; |
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struct statvfs fs; |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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struct mntent *mp; |
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struct statfs fs; |
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#endif |
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#ifdef ALLBSD |
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int nummnt; |
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struct statfs *mp; |
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#endif |
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|
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#ifdef ALLBSD |
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nummnt=getmntinfo(&mp , MNT_LOCAL); |
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if (nummnt<=0){ |
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return NULL; |
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} |
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for(;nummnt--; mp++){ |
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valid_type = is_valid_fs_type(mp->f_fstypename); |
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#endif |
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|
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#if defined(LINUX) || defined(CYGWIN) |
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if ((f=setmntent("/etc/mtab", "r" ))==NULL){ |
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return NULL; |
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} |
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|
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while((mp=getmntent(f))){ |
156 |
if((statfs(mp->mnt_dir, &fs)) !=0){ |
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continue; |
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} |
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|
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valid_type = is_valid_fs_type(mp->mnt_type); |
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#endif |
162 |
|
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#ifdef SOLARIS |
164 |
if ((f=fopen("/etc/mnttab", "r" ))==NULL){ |
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return NULL; |
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} |
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while((getmntent(f, &mp)) == 0){ |
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if ((statvfs(mp.mnt_mountp, &fs)) !=0){ |
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continue; |
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} |
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valid_type = is_valid_fs_type(mp.mnt_fstype); |
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#endif |
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|
174 |
if(valid_type){ |
175 |
if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) { |
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return NULL; |
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} |
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disk_ptr=disk_stats+num_disks; |
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|
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#ifdef ALLBSD |
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if (copy_string(&disk_ptr->device_name, mp->f_mntfromname) == NULL) { |
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return NULL; |
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} |
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if (copy_string(&disk_ptr->fs_type, mp->f_fstypename) == NULL) { |
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return NULL; |
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} |
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if (copy_string(&disk_ptr->mnt_point, mp->f_mntonname) == NULL) { |
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return NULL; |
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} |
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|
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disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks; |
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disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail; |
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disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree); |
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|
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disk_ptr->total_inodes=(long long)mp->f_files; |
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disk_ptr->free_inodes=(long long)mp->f_ffree; |
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/* Freebsd doesn't have a "available" inodes */ |
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disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes; |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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if (copy_string(&disk_ptr->device_name, mp->mnt_fsname) == NULL) { |
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return NULL; |
203 |
} |
204 |
|
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if (copy_string(&disk_ptr->fs_type, mp->mnt_type) == NULL) { |
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return NULL; |
207 |
} |
208 |
|
209 |
if (copy_string(&disk_ptr->mnt_point, mp->mnt_dir) == NULL) { |
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return NULL; |
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} |
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disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks; |
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disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail; |
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disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree); |
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|
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disk_ptr->total_inodes=(long long)fs.f_files; |
217 |
disk_ptr->free_inodes=(long long)fs.f_ffree; |
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/* Linux doesn't have a "available" inodes */ |
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disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes; |
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#endif |
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|
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#ifdef SOLARIS |
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/* Maybe make this char[bigenough] and do strncpy's and put a null in the end? |
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* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob |
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* be upwards of a k each |
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*/ |
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if (copy_string(&disk_ptr->device_name, mp.mnt_special) == NULL) { |
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return NULL; |
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} |
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|
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if (copy_string(&disk_ptr->fs_type, mp.mnt_fstype) == NULL) { |
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return NULL; |
233 |
} |
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|
235 |
if (copy_string(&disk_ptr->mnt_point, mp.mnt_mountp) == NULL) { |
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return NULL; |
237 |
} |
238 |
|
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disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks; |
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disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail; |
241 |
disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_frsize * (long long)fs.f_bfree); |
242 |
|
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disk_ptr->total_inodes=(long long)fs.f_files; |
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disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree; |
245 |
disk_ptr->free_inodes=(long long)fs.f_favail; |
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#endif |
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num_disks++; |
248 |
} |
249 |
} |
250 |
|
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*entries=num_disks; |
252 |
|
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/* If this fails, there is very little i can do about it, so |
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I'll ignore it :) */ |
255 |
#if defined(LINUX) || defined(CYGWIN) |
256 |
endmntent(f); |
257 |
#endif |
258 |
#if defined(SOLARIS) |
259 |
fclose(f); |
260 |
#endif |
261 |
|
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return disk_stats; |
263 |
|
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} |
265 |
|
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static void diskio_stat_init(diskio_stat_t *d) { |
267 |
d->disk_name = NULL; |
268 |
} |
269 |
|
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static void diskio_stat_destroy(diskio_stat_t *d) { |
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free(d->disk_name); |
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} |
273 |
|
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VECTOR_DECLARE_STATIC(diskio_stats, diskio_stat_t, 10, |
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diskio_stat_init, diskio_stat_destroy); |
276 |
|
277 |
#ifdef LINUX |
278 |
typedef struct { |
279 |
int major; |
280 |
int minor; |
281 |
} partition; |
282 |
#endif |
283 |
|
284 |
diskio_stat_t *get_diskio_stats(int *entries){ |
285 |
int num_diskio; |
286 |
#ifndef LINUX |
287 |
diskio_stat_t *diskio_stats_ptr; |
288 |
#endif |
289 |
|
290 |
#ifdef SOLARIS |
291 |
kstat_ctl_t *kc; |
292 |
kstat_t *ksp; |
293 |
kstat_io_t kios; |
294 |
#endif |
295 |
#ifdef LINUX |
296 |
FILE *f; |
297 |
char *line_ptr; |
298 |
int major, minor; |
299 |
int has_pp_stats = 1; |
300 |
VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL); |
301 |
int i, n; |
302 |
time_t now; |
303 |
const char *format; |
304 |
#endif |
305 |
#if defined(FREEBSD) || defined(DFBSD) |
306 |
static struct statinfo stats; |
307 |
static int stats_init = 0; |
308 |
int counter; |
309 |
struct device_selection *dev_sel = NULL; |
310 |
int n_selected, n_selections; |
311 |
long sel_gen; |
312 |
struct devstat *dev_ptr; |
313 |
#endif |
314 |
#ifdef NETBSD |
315 |
struct disk_sysctl *stats; |
316 |
#endif |
317 |
#ifdef OPENBSD |
318 |
int diskcount; |
319 |
char *disknames, *name, *bufpp; |
320 |
char **dk_name; |
321 |
struct diskstats *stats; |
322 |
#endif |
323 |
#ifdef NETBSD |
324 |
#define MIBSIZE 3 |
325 |
#endif |
326 |
#ifdef OPENBSD |
327 |
#define MIBSIZE 2 |
328 |
#endif |
329 |
#if defined(NETBSD) || defined(OPENBSD) |
330 |
int num_disks, i; |
331 |
int mib[MIBSIZE]; |
332 |
size_t size; |
333 |
#endif |
334 |
|
335 |
num_diskio=0; |
336 |
|
337 |
#ifdef OPENBSD |
338 |
mib[0] = CTL_HW; |
339 |
mib[1] = HW_DISKCOUNT; |
340 |
|
341 |
size = sizeof(diskcount); |
342 |
if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) { |
343 |
return NULL; |
344 |
} |
345 |
|
346 |
mib[0] = CTL_HW; |
347 |
mib[1] = HW_DISKNAMES; |
348 |
|
349 |
if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) { |
350 |
return NULL; |
351 |
} |
352 |
|
353 |
disknames = malloc(size); |
354 |
if (disknames == NULL) { |
355 |
return NULL; |
356 |
} |
357 |
|
358 |
if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) { |
359 |
return NULL; |
360 |
} |
361 |
|
362 |
dk_name = calloc(diskcount, sizeof(char *)); |
363 |
bufpp = disknames; |
364 |
for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) { |
365 |
dk_name[i] = name; |
366 |
} |
367 |
#endif |
368 |
|
369 |
#if defined(NETBSD) || defined(OPENBSD) |
370 |
mib[0] = CTL_HW; |
371 |
mib[1] = HW_DISKSTATS; |
372 |
#ifdef NETBSD |
373 |
mib[2] = sizeof(struct disk_sysctl); |
374 |
#endif |
375 |
|
376 |
if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) { |
377 |
return NULL; |
378 |
} |
379 |
|
380 |
#ifdef NETBSD |
381 |
num_disks = size / sizeof(struct disk_sysctl); |
382 |
#else |
383 |
num_disks = size / sizeof(struct diskstats); |
384 |
#endif |
385 |
|
386 |
stats = malloc(size); |
387 |
if (stats == NULL) { |
388 |
return NULL; |
389 |
} |
390 |
|
391 |
if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) { |
392 |
return NULL; |
393 |
} |
394 |
|
395 |
for (i = 0; i < num_disks; i++) { |
396 |
u_int64_t rbytes, wbytes; |
397 |
|
398 |
#ifdef NETBSD |
399 |
#ifdef HAVE_DK_RBYTES |
400 |
rbytes = stats[i].dk_rbytes; |
401 |
wbytes = stats[i].dk_wbytes; |
402 |
#else |
403 |
/* Before 1.7, NetBSD merged reads and writes. */ |
404 |
rbytes = wbytes = stats[i].dk_bytes; |
405 |
#endif |
406 |
#else |
407 |
rbytes = wbytes = stats[i].ds_bytes; |
408 |
#endif |
409 |
|
410 |
/* Don't keep stats for disks that have never been used. */ |
411 |
if (rbytes == 0 && wbytes == 0) { |
412 |
continue; |
413 |
} |
414 |
|
415 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
416 |
return NULL; |
417 |
} |
418 |
diskio_stats_ptr = diskio_stats + num_diskio; |
419 |
|
420 |
diskio_stats_ptr->read_bytes = rbytes; |
421 |
diskio_stats_ptr->write_bytes = wbytes; |
422 |
if (diskio_stats_ptr->disk_name != NULL) { |
423 |
free(diskio_stats_ptr->disk_name); |
424 |
} |
425 |
#ifdef NETBSD |
426 |
diskio_stats_ptr->disk_name = strdup(stats[i].dk_name); |
427 |
#else |
428 |
diskio_stats_ptr->disk_name = strdup(dk_name[i]); |
429 |
#endif |
430 |
diskio_stats_ptr->systime = time(NULL); |
431 |
|
432 |
num_diskio++; |
433 |
} |
434 |
|
435 |
free(stats); |
436 |
#ifdef OPENBSD |
437 |
free(dk_name); |
438 |
free(disknames); |
439 |
#endif |
440 |
#endif |
441 |
|
442 |
#if defined(FREEBSD) || defined(DFBSD) |
443 |
if (!stats_init) { |
444 |
stats.dinfo=malloc(sizeof(struct devinfo)); |
445 |
if(stats.dinfo==NULL) return NULL; |
446 |
bzero(stats.dinfo, sizeof(struct devinfo)); |
447 |
stats_init = 1; |
448 |
} |
449 |
#ifdef FREEBSD5 |
450 |
if ((devstat_getdevs(NULL, &stats)) < 0) return NULL; |
451 |
/* Not aware of a get all devices, so i said 999. If we ever |
452 |
* find a machine with more than 999 disks, then i'll change |
453 |
* this number :) |
454 |
*/ |
455 |
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; |
456 |
#else |
457 |
if ((getdevs(&stats)) < 0) return NULL; |
458 |
/* Not aware of a get all devices, so i said 999. If we ever |
459 |
* find a machine with more than 999 disks, then i'll change |
460 |
* this number :) |
461 |
*/ |
462 |
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; |
463 |
#endif |
464 |
|
465 |
for(counter=0;counter<stats.dinfo->numdevs;counter++){ |
466 |
dev_ptr=&stats.dinfo->devices[dev_sel[counter].position]; |
467 |
|
468 |
/* Throw away devices that have done nothing, ever.. Eg "odd" |
469 |
* devices.. like mem, proc.. and also doesn't report floppy |
470 |
* drives etc unless they are doing stuff :) |
471 |
*/ |
472 |
#ifdef FREEBSD5 |
473 |
if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue; |
474 |
#else |
475 |
if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue; |
476 |
#endif |
477 |
|
478 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
479 |
return NULL; |
480 |
} |
481 |
diskio_stats_ptr=diskio_stats+num_diskio; |
482 |
|
483 |
#ifdef FREEBSD5 |
484 |
diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ]; |
485 |
diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE]; |
486 |
#else |
487 |
diskio_stats_ptr->read_bytes=dev_ptr->bytes_read; |
488 |
diskio_stats_ptr->write_bytes=dev_ptr->bytes_written; |
489 |
#endif |
490 |
if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name); |
491 |
asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number); |
492 |
diskio_stats_ptr->systime=time(NULL); |
493 |
|
494 |
num_diskio++; |
495 |
} |
496 |
free(dev_sel); |
497 |
|
498 |
#endif |
499 |
#ifdef SOLARIS |
500 |
if ((kc = kstat_open()) == NULL) { |
501 |
return NULL; |
502 |
} |
503 |
|
504 |
for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) { |
505 |
if (!strcmp(ksp->ks_class, "disk")) { |
506 |
|
507 |
if(ksp->ks_type != KSTAT_TYPE_IO) continue; |
508 |
/* We dont want metadevices appearins as num_diskio */ |
509 |
if(strcmp(ksp->ks_module, "md")==0) continue; |
510 |
if((kstat_read(kc, ksp, &kios))==-1){ |
511 |
} |
512 |
|
513 |
if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) { |
514 |
kstat_close(kc); |
515 |
return NULL; |
516 |
} |
517 |
diskio_stats_ptr=diskio_stats+num_diskio; |
518 |
|
519 |
diskio_stats_ptr->read_bytes=kios.nread; |
520 |
|
521 |
diskio_stats_ptr->write_bytes=kios.nwritten; |
522 |
|
523 |
if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name); |
524 |
|
525 |
diskio_stats_ptr->disk_name=strdup((char *) get_svr_from_bsd(ksp->ks_name)); |
526 |
diskio_stats_ptr->systime=time(NULL); |
527 |
num_diskio++; |
528 |
} |
529 |
} |
530 |
|
531 |
kstat_close(kc); |
532 |
#endif |
533 |
|
534 |
#ifdef LINUX |
535 |
num_diskio = 0; |
536 |
n = 0; |
537 |
|
538 |
/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels |
539 |
have statistics in here too, so we can use those directly. |
540 |
2.6 kernels have /proc/diskstats instead with almost (but not quite) |
541 |
the same format. */ |
542 |
|
543 |
f = fopen("/proc/diskstats", "r"); |
544 |
format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld"; |
545 |
if (f == NULL) { |
546 |
f = fopen("/proc/partitions", "r"); |
547 |
format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld"; |
548 |
} |
549 |
if (f == NULL) goto out; |
550 |
now = time(NULL); |
551 |
|
552 |
while ((line_ptr = f_read_line(f, "")) != NULL) { |
553 |
char name[100]; |
554 |
char *s; |
555 |
long long rsect, wsect; |
556 |
|
557 |
int nr = sscanf(line_ptr, format, |
558 |
&major, &minor, name, &rsect, &wsect); |
559 |
if (nr < 3) continue; |
560 |
|
561 |
/* Skip device names ending in numbers, since they're |
562 |
partitions. */ |
563 |
s = name; |
564 |
while (*s != '\0') s++; |
565 |
--s; |
566 |
if (*s >= '0' && *s <= '9') continue; |
567 |
|
568 |
if (nr < 5) { |
569 |
has_pp_stats = 0; |
570 |
rsect = 0; |
571 |
wsect = 0; |
572 |
} |
573 |
|
574 |
if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) { |
575 |
goto out; |
576 |
} |
577 |
if (VECTOR_RESIZE(parts, n + 1) < 0) { |
578 |
goto out; |
579 |
} |
580 |
|
581 |
if (diskio_stats[n].disk_name != NULL) |
582 |
free(diskio_stats[n].disk_name); |
583 |
diskio_stats[n].disk_name = strdup(name); |
584 |
diskio_stats[n].read_bytes = rsect * 512; |
585 |
diskio_stats[n].write_bytes = wsect * 512; |
586 |
diskio_stats[n].systime = now; |
587 |
parts[n].major = major; |
588 |
parts[n].minor = minor; |
589 |
|
590 |
n++; |
591 |
} |
592 |
|
593 |
fclose(f); |
594 |
f = NULL; |
595 |
|
596 |
if (!has_pp_stats) { |
597 |
/* This is an older kernel where /proc/partitions doesn't |
598 |
contain stats. Read what we can from /proc/stat instead, and |
599 |
fill in the appropriate bits of the list allocated above. */ |
600 |
|
601 |
f = fopen("/proc/stat", "r"); |
602 |
if (f == NULL) goto out; |
603 |
now = time(NULL); |
604 |
|
605 |
line_ptr = f_read_line(f, "disk_io:"); |
606 |
if (line_ptr == NULL) goto out; |
607 |
|
608 |
while((line_ptr=strchr(line_ptr, ' '))!=NULL){ |
609 |
long long rsect, wsect; |
610 |
|
611 |
if (*++line_ptr == '\0') break; |
612 |
|
613 |
if((sscanf(line_ptr, |
614 |
"(%d,%d):(%*d, %*d, %lld, %*d, %lld)", |
615 |
&major, &minor, &rsect, &wsect)) != 4) { |
616 |
continue; |
617 |
} |
618 |
|
619 |
/* Find the corresponding device from earlier. |
620 |
Just to add to the fun, "minor" is actually the disk |
621 |
number, not the device minor, so we need to figure |
622 |
out the real minor number based on the major! |
623 |
This list is not exhaustive; if you're running |
624 |
an older kernel you probably don't have fancy |
625 |
I2O hardware anyway... */ |
626 |
switch (major) { |
627 |
case 3: |
628 |
case 21: |
629 |
case 22: |
630 |
case 33: |
631 |
case 34: |
632 |
case 36: |
633 |
case 56: |
634 |
case 57: |
635 |
case 88: |
636 |
case 89: |
637 |
case 90: |
638 |
case 91: |
639 |
minor *= 64; |
640 |
break; |
641 |
case 9: |
642 |
case 43: |
643 |
break; |
644 |
default: |
645 |
minor *= 16; |
646 |
break; |
647 |
} |
648 |
for (i = 0; i < n; i++) { |
649 |
if (major == parts[i].major |
650 |
&& minor == parts[i].minor) |
651 |
break; |
652 |
} |
653 |
if (i == n) continue; |
654 |
|
655 |
/* We read the number of blocks. Blocks are stored in |
656 |
512 bytes */ |
657 |
diskio_stats[i].read_bytes = rsect * 512; |
658 |
diskio_stats[i].write_bytes = wsect * 512; |
659 |
diskio_stats[i].systime = now; |
660 |
} |
661 |
} |
662 |
|
663 |
num_diskio = n; |
664 |
out: |
665 |
if (f != NULL) fclose(f); |
666 |
#endif |
667 |
|
668 |
#ifdef CYGWIN |
669 |
return NULL; |
670 |
#endif |
671 |
|
672 |
*entries=num_diskio; |
673 |
|
674 |
return diskio_stats; |
675 |
} |
676 |
|
677 |
diskio_stat_t *get_diskio_stats_diff(int *entries){ |
678 |
VECTOR_DECLARE_STATIC(diff, diskio_stat_t, 1, |
679 |
diskio_stat_init, diskio_stat_destroy); |
680 |
diskio_stat_t *src = NULL, *dest; |
681 |
int i, j, diff_count, new_count; |
682 |
|
683 |
if (diskio_stats == NULL) { |
684 |
/* No previous stats, so we can't calculate a difference. */ |
685 |
return get_diskio_stats(entries); |
686 |
} |
687 |
|
688 |
/* Resize the results array to match the previous stats. */ |
689 |
diff_count = VECTOR_SIZE(diskio_stats); |
690 |
if (VECTOR_RESIZE(diff, diff_count) < 0) { |
691 |
return NULL; |
692 |
} |
693 |
|
694 |
/* Copy the previous stats into the result. */ |
695 |
for (i = 0; i < diff_count; i++) { |
696 |
src = &diskio_stats[i]; |
697 |
dest = &diff[i]; |
698 |
|
699 |
if (dest->disk_name != NULL) { |
700 |
free(dest->disk_name); |
701 |
} |
702 |
dest->disk_name = strdup(src->disk_name); |
703 |
dest->read_bytes = src->read_bytes; |
704 |
dest->write_bytes = src->write_bytes; |
705 |
dest->systime = src->systime; |
706 |
} |
707 |
|
708 |
/* Get a new set of stats. */ |
709 |
if (get_diskio_stats(&new_count) == NULL) { |
710 |
return NULL; |
711 |
} |
712 |
|
713 |
/* For each previous stat... */ |
714 |
for (i = 0; i < diff_count; i++) { |
715 |
dest = &diff[i]; |
716 |
|
717 |
/* ... find the corresponding new stat ... */ |
718 |
for (j = 0; j < new_count; j++) { |
719 |
/* Try the new stat in the same position first, |
720 |
since that's most likely to be it. */ |
721 |
src = &diskio_stats[(i + j) % new_count]; |
722 |
if (strcmp(src->disk_name, dest->disk_name) == 0) { |
723 |
break; |
724 |
} |
725 |
} |
726 |
if (j == new_count) { |
727 |
/* No match found. */ |
728 |
continue; |
729 |
} |
730 |
|
731 |
/* ... and subtract the previous stat from it to get the |
732 |
difference. */ |
733 |
dest->read_bytes = src->read_bytes - dest->read_bytes; |
734 |
dest->write_bytes = src->write_bytes - dest->write_bytes; |
735 |
dest->systime = src->systime - dest->systime; |
736 |
} |
737 |
|
738 |
*entries = diff_count; |
739 |
return diff; |
740 |
} |
741 |
|