src/libstatgrab/disk_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <string.h>
#include "statgrab.h"

#ifdef SOLARIS
#include <stdio.h>
#include <sys/mnttab.h>
#include <sys/statvfs.h>
#include <kstat.h>
#define VALID_FS_TYPES {"ufs", "tmpfs"}
#endif

#ifdef LINUX
#include <stdio.h>
#include <sys/vfs.h>
#include <mntent.h>
#include "tools.h"
#define VALID_FS_TYPES {"ext2", "ext3", "xfs", "reiserfs", "vfat", "tmpfs"}
#endif

#define START_VAL 1

char *copy_string(char *orig_ptr, const char *newtext){

        /* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
        orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
        if(orig_ptr==NULL){
                return NULL;
        }
        strcpy(orig_ptr, newtext);

        return orig_ptr;
}


void init_disk_stat(int start, int end, disk_stat_t *disk_stats){

        for(disk_stats+=start; start<=end; start++){
                disk_stats->device_name=NULL;
                disk_stats->fs_type=NULL;
                disk_stats->mnt_point=NULL;
                
                disk_stats++;
        }
}

disk_stat_t *get_disk_stats(int *entries){

        static disk_stat_t *disk_stats;
        static int watermark=-1;

        char *fs_types[] = VALID_FS_TYPES;
        int x, valid_type;
        int num_disks=0;
        FILE *f;

        disk_stat_t *disk_ptr;

#ifdef SOLARIS
        struct mnttab *mp;
        struct statvfs fs;
#endif
#ifdef LINUX
        struct mntent *mp;
        struct statfs fs;
#endif

        if(watermark==-1){
                disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
                if(disk_stats==NULL){
                        return NULL;
                }
                watermark=START_VAL;
                init_disk_stat(0, watermark-1, disk_stats);
        }
#ifdef LINUX
        if ((f=setmntent("/etc/mtab", "r" ))==NULL){
                return NULL;
        }

        while((mp=getmntent(f))){
                if((statfs(mp->mnt_dir, &fs)) !=0){
                        continue;
                }       

                valid_type=0;
                for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
                        if(strcmp(mp->mnt_type, fs_types[x]) ==0){
                                valid_type=1;
                                break;
                        }
                }
#endif

#ifdef SOLARIS
        if ((f=fopen("/etc/mnttab", "r" ))==NULL){
                return NULL;
        }
        while((getmntent(f, &mp)) == 0){
                if ((statvfs(mp.mnt_mountp, &fs)) !=0){
                        continue;
                }
                valid_type=0;
                for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
                        if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
                                valid_type=1;
                                break;
                        }
                }
#endif

                if(valid_type){
                        if(num_disks>watermark-1){
                                disk_ptr=disk_stats;
                                if((disk_stats=realloc(disk_stats, (watermark*2 * sizeof(disk_stat_t))))==NULL){
                                        disk_stats=disk_ptr;
                                        return NULL;
                                }

                                watermark=watermark*2;
                                init_disk_stat(num_disks, watermark-1, disk_stats);
                        }

                        disk_ptr=disk_stats+num_disks;
#ifdef LINUX
                        if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
                                return NULL;
                        }
                                
                        if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){     
                                return NULL;
                        }

                        if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
                                return NULL;
                        }
                        disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
                        disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
                        disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);

                        disk_ptr->total_inodes=(long long)fs.f_files;
                        disk_ptr->free_inodes=(long long)fs.f_ffree;
                        /* Linux doesn't have a "available" inodes */
                        disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
#endif

#ifdef SOLARIS
                        /* Memory leak in event of realloc failing */
                        /* Maybe make this char[bigenough] and do strncpy's and put a null in the end? 
                         * Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob 
                         * be upwards of a k each 
                         */
                        if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
                                return NULL;
                        }

                        if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
                                return NULL;
                        }
        
                        if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
                                return NULL;
                        }
                        
                        disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks;
                        disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail;
                        disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_frsize * (long long)fs.f_bfree);
                
                        disk_ptr->total_inodes=(long long)fs.f_files;
                        disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
                        disk_ptr->free_inodes=(long long)fs.f_favail;
#endif
                        num_disks++;
                }
        }

        *entries=num_disks;     

        /* If this fails, there is very little i can do about it, so i'll ignore it :) */
        fclose(f);

        return disk_stats;

}
void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){

        for(diskio_stats+=start; start<end; start++){
                diskio_stats->disk_name=NULL;
                
                diskio_stats++;
        }
}

diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){

        if(diskio_stats==NULL){

                if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
                        return NULL;
                }
                diskio_stat_init(0, needed_entries, diskio_stats);
                *cur_entries=needed_entries;

                return diskio_stats;
        }


        if(*cur_entries<needed_entries){
                diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
                if(diskio_stats==NULL){
                        return NULL;
                }
                diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
                *cur_entries=needed_entries;
        }

        return diskio_stats;
}

static diskio_stat_t *diskio_stats=NULL;        
static int num_diskio=0;        

diskio_stat_t *get_diskio_stats(int *entries){

        static int sizeof_diskio_stats=0;
        diskio_stat_t *diskio_stats_ptr;

#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_io_t kios;
#endif
#ifdef LINUX
        FILE *f;
        char *line_ptr;
        int major, minor;
        char dev_letter;
#endif
        num_diskio=0;

#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                return NULL;
        }

        for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
                if (!strcmp(ksp->ks_class, "disk")) {

                        if(ksp->ks_type != KSTAT_TYPE_IO) continue;
                        /* We dont want metadevices appearins as num_diskio */
                        if(strcmp(ksp->ks_module, "md")==0) continue;
                        if((kstat_read(kc, ksp, &kios))==-1){   
                        }
                        
                        if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
                                kstat_close(kc);
                                return NULL;
                        }
                        diskio_stats_ptr=diskio_stats+num_diskio;
                        
                        diskio_stats_ptr->read_bytes=kios.nread;
                        
                        diskio_stats_ptr->write_bytes=kios.nwritten;

                        if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);

                        diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
                        num_diskio++;
                }
        }

        kstat_close(kc);
#endif

#ifdef LINUX
        f=fopen("/proc/stat", "r");
        if(f==NULL){
                *entries=0;
                fclose(f);
                return NULL;
        }
        if((line_ptr=f_read_line(f, "disk_io:"))==NULL){
                *entries=0;
                fclose(f);
                return NULL;
        }
        while((line_ptr=strchr(line_ptr, ' '))!=NULL){
                line_ptr++;
                if(*line_ptr=='\0'){
                        break;
                }
                if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
                        fclose(f);
                        *entries=0;
                        return NULL;
                }
                diskio_stats_ptr=diskio_stats+num_diskio;


                if((sscanf(line_ptr, "(%d,%d):(%*d, %lld, %*d, %lld, %*d)", \
                        &major, \
                        &minor, \
                        &diskio_stats_ptr->read_bytes, \
                        &diskio_stats_ptr->write_bytes))!=4) {
                                continue;
                }

                if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);

                switch(major){
                        case 2:
                                if(minor==0){
                                        diskio_stats_ptr->disk_name=strdup("fd0");
                                }
                                break;

                        case 3: 
                                if(minor==0){
                                        diskio_stats_ptr->disk_name=strdup("hda");
                                }else{
                                        diskio_stats_ptr->disk_name=strdup("hdb");
                                }
                                break;

                        case 22:
                                if(minor==0){
                                        diskio_stats_ptr->disk_name=strdup("hdc");
                                }else{
                                        diskio_stats_ptr->disk_name=strdup("hdd");
                                }
                                break;
                        case 8:
                                dev_letter='a'+(minor/16);
                                diskio_stats_ptr->disk_name=malloc(4);
                                snprintf(diskio_stats_ptr->disk_name, 4, "sd%c", dev_letter);
                                break;
                        default:
                                /* I have no idea what it is then :) */
                                diskio_stats_ptr->disk_name=malloc(16);
                                snprintf(diskio_stats_ptr->disk_name, 16, "%d %d", major, minor);
                                break;
                }

                num_diskio++;
        }

#endif
        *entries=num_diskio;

        return diskio_stats;
}

diskio_stat_t *get_diskio_stats_diff(int *entries){
        static diskio_stat_t *diskio_stats_diff=NULL;
        static int sizeof_diskio_stats_diff=0;
        diskio_stat_t *diskio_stats_diff_ptr, *diskio_stats_ptr;
        int disks, x, y;

        if(diskio_stats==NULL){
                diskio_stats_ptr=get_diskio_stats(&disks);
                *entries=disks;
                return diskio_stats_ptr;
        }

        diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
        if(diskio_stats_diff==NULL){
                return NULL;
        }

        diskio_stats_diff_ptr=diskio_stats_diff;
        diskio_stats_ptr=diskio_stats;

        for(disks=0;disks<num_diskio;disks++){
                if(diskio_stats_diff_ptr->disk_name!=NULL){
                        free(diskio_stats_diff_ptr->disk_name);
                }
                diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
                diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
                diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
                diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;

                diskio_stats_diff_ptr++;
                diskio_stats_ptr++;
        }

        diskio_stats_ptr=get_diskio_stats(&disks);
        diskio_stats_diff_ptr=diskio_stats_diff;

        for(x=0;x<sizeof_diskio_stats_diff;x++){

                if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
                        diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
                        diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
                        diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
                }else{
                        diskio_stats_ptr=diskio_stats;
                        for(y=0;y<disks;y++){
                                if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
                                        diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
                                        diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
                                        diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;

                                        break;
                                }
                                
                                diskio_stats_ptr++;
                        }
                }

                diskio_stats_ptr++;
                diskio_stats_diff_ptr++;        

        }
        
        *entries=sizeof_diskio_stats_diff;
        return diskio_stats_diff;
}
Revision:	1.11
Committed:	Wed Mar 5 12:41:19 2003 UTC (21 years, 2 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+22 -3 lines
Log Message:	Working linux diskio stats. Fixed bug in tools.c
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org.uk
4			* Copyright (C) 2000-2002 i-scream
5			*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program 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
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25			#include <stdlib.h>
26			#include <string.h>
27	tdb	1.7	#include "statgrab.h"
28	pajs	1.1
29			#ifdef SOLARIS
30	pajs	1.9	#include <stdio.h>
31	pajs	1.1	#include <sys/mnttab.h>
32			#include <sys/statvfs.h>
33	pajs	1.4	#include <kstat.h>
34	pajs	1.1	#define VALID_FS_TYPES {"ufs", "tmpfs"}
35			#endif
36
37	pajs	1.9	#ifdef LINUX
38			#include <stdio.h>
39			#include <sys/vfs.h>
40			#include <mntent.h>
41	pajs	1.10	#include "tools.h"
42	pajs	1.9	#define VALID_FS_TYPES {"ext2", "ext3", "xfs", "reiserfs", "vfat", "tmpfs"}
43			#endif
44
45	pajs	1.1	#define START_VAL 1
46
47			char copy_string(char orig_ptr, const char *newtext){
48
49			/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
50			orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
51			if(orig_ptr==NULL){
52			return NULL;
53			}
54			strcpy(orig_ptr, newtext);
55
56			return orig_ptr;
57			}
58
59
60			void init_disk_stat(int start, int end, disk_stat_t *disk_stats){
61
62			for(disk_stats+=start; start<=end; start++){
63			disk_stats->device_name=NULL;
64			disk_stats->fs_type=NULL;
65			disk_stats->mnt_point=NULL;
66
67			disk_stats++;
68			}
69			}
70
71			disk_stat_t get_disk_stats(int entries){
72
73			static disk_stat_t *disk_stats;
74			static int watermark=-1;
75
76			char *fs_types[] = VALID_FS_TYPES;
77			int x, valid_type;
78			int num_disks=0;
79			FILE *f;
80
81			disk_stat_t *disk_ptr;
82
83	pajs	1.9	#ifdef SOLARIS
84			struct mnttab *mp;
85			struct statvfs fs;
86			#endif
87			#ifdef LINUX
88			struct mntent *mp;
89			struct statfs fs;
90			#endif
91
92	pajs	1.1	if(watermark==-1){
93			disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
94			if(disk_stats==NULL){
95			return NULL;
96			}
97			watermark=START_VAL;
98			init_disk_stat(0, watermark-1, disk_stats);
99			}
100	pajs	1.9	#ifdef LINUX
101			if ((f=setmntent("/etc/mtab", "r" ))==NULL){
102			return NULL;
103			}
104	pajs	1.1
105	pajs	1.9	while((mp=getmntent(f))){
106			if((statfs(mp->mnt_dir, &fs)) !=0){
107			continue;
108			}
109	pajs	1.1
110	pajs	1.9	valid_type=0;
111			for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
112			if(strcmp(mp->mnt_type, fs_types[x]) ==0){
113			valid_type=1;
114			break;
115			}
116			}
117			#endif
118
119			#ifdef SOLARIS
120	pajs	1.1	if ((f=fopen("/etc/mnttab", "r" ))==NULL){
121			return NULL;
122			}
123			while((getmntent(f, &mp)) == 0){
124			if ((statvfs(mp.mnt_mountp, &fs)) !=0){
125			continue;
126			}
127			valid_type=0;
128			for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
129			if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
130			valid_type=1;
131			break;
132			}
133			}
134	pajs	1.9	#endif
135	pajs	1.1
136			if(valid_type){
137			if(num_disks>watermark-1){
138			disk_ptr=disk_stats;
139			if((disk_stats=realloc(disk_stats, (watermark2 sizeof(disk_stat_t))))==NULL){
140			disk_stats=disk_ptr;
141			return NULL;
142			}
143
144			watermark=watermark*2;
145			init_disk_stat(num_disks, watermark-1, disk_stats);
146			}
147
148			disk_ptr=disk_stats+num_disks;
149	pajs	1.9	#ifdef LINUX
150			if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
151			return NULL;
152			}
153
154			if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
155			return NULL;
156			}
157
158			if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
159			return NULL;
160			}
161			disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
162			disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
163			disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
164
165			disk_ptr->total_inodes=(long long)fs.f_files;
166			disk_ptr->free_inodes=(long long)fs.f_ffree;
167			/* Linux doesn't have a "available" inodes */
168			disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
169			#endif
170
171			#ifdef SOLARIS
172	pajs	1.1	/* Memory leak in event of realloc failing */
173			/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
174	pajs	1.9	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
175			* be upwards of a k each
176			*/
177	pajs	1.1	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
178			return NULL;
179			}
180
181			if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
182			return NULL;
183			}
184
185			if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
186			return NULL;
187			}
188
189			disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks;
190			disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail;
191			disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_frsize * (long long)fs.f_bfree);
192
193			disk_ptr->total_inodes=(long long)fs.f_files;
194			disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
195			disk_ptr->free_inodes=(long long)fs.f_favail;
196	pajs	1.9	#endif
197	pajs	1.1	num_disks++;
198			}
199			}
200
201			*entries=num_disks;
202
203			/* If this fails, there is very little i can do about it, so i'll ignore it :) */
204			fclose(f);
205
206			return disk_stats;
207
208			}
209	pajs	1.4	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
210
211			for(diskio_stats+=start; start<end; start++){
212			diskio_stats->disk_name=NULL;
213
214			diskio_stats++;
215			}
216			}
217
218			diskio_stat_t diskio_stat_malloc(int needed_entries, int cur_entries, diskio_stat_t *diskio_stats){
219
220			if(diskio_stats==NULL){
221
222			if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
223			return NULL;
224			}
225			diskio_stat_init(0, needed_entries, diskio_stats);
226			*cur_entries=needed_entries;
227
228			return diskio_stats;
229			}
230
231
232			if(*cur_entries<needed_entries){
233			diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
234			if(diskio_stats==NULL){
235			return NULL;
236			}
237			diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
238			*cur_entries=needed_entries;
239			}
240
241			return diskio_stats;
242			}
243
244			static diskio_stat_t *diskio_stats=NULL;
245	pajs	1.5	static int num_diskio=0;
246	pajs	1.4
247	tdb	1.3	diskio_stat_t get_diskio_stats(int entries){
248	pajs	1.2
249	pajs	1.4	static int sizeof_diskio_stats=0;
250			diskio_stat_t *diskio_stats_ptr;
251
252	pajs	1.10	#ifdef SOLARIS
253	pajs	1.4	kstat_ctl_t *kc;
254			kstat_t *ksp;
255			kstat_io_t kios;
256	pajs	1.10	#endif
257			#ifdef LINUX
258			FILE *f;
259			char *line_ptr;
260			int major, minor;
261			char dev_letter;
262			#endif
263			num_diskio=0;
264	pajs	1.4
265	pajs	1.10	#ifdef SOLARIS
266	pajs	1.4	if ((kc = kstat_open()) == NULL) {
267			return NULL;
268			}
269
270			for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
271			if (!strcmp(ksp->ks_class, "disk")) {
272
273			if(ksp->ks_type != KSTAT_TYPE_IO) continue;
274	pajs	1.5	/* We dont want metadevices appearins as num_diskio */
275	pajs	1.4	if(strcmp(ksp->ks_module, "md")==0) continue;
276			if((kstat_read(kc, ksp, &kios))==-1){
277			}
278
279	pajs	1.5	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
280	pajs	1.4	kstat_close(kc);
281			return NULL;
282			}
283	pajs	1.5	diskio_stats_ptr=diskio_stats+num_diskio;
284	pajs	1.4
285			diskio_stats_ptr->read_bytes=kios.nread;
286
287			diskio_stats_ptr->write_bytes=kios.nwritten;
288
289			if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
290
291			diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
292	pajs	1.5	num_diskio++;
293	pajs	1.4	}
294			}
295
296			kstat_close(kc);
297	pajs	1.10	#endif
298	pajs	1.4
299	pajs	1.10	#ifdef LINUX
300			f=fopen("/proc/stat", "r");
301			if(f==NULL){
302	pajs	1.11	*entries=0;
303			fclose(f);
304	pajs	1.10	return NULL;
305			}
306			if((line_ptr=f_read_line(f, "disk_io:"))==NULL){
307	pajs	1.11	*entries=0;
308			fclose(f);
309	pajs	1.10	return NULL;
310			}
311			while((line_ptr=strchr(line_ptr, ' '))!=NULL){
312	pajs	1.11	line_ptr++;
313			if(*line_ptr=='\0'){
314			break;
315			}
316	pajs	1.10	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
317			fclose(f);
318	pajs	1.11	*entries=0;
319	pajs	1.10	return NULL;
320			}
321			diskio_stats_ptr=diskio_stats+num_diskio;
322
323
324	pajs	1.11	if((sscanf(line_ptr, "(%d,%d):(%d, %lld, %d, %lld, %*d)", \
325	pajs	1.10	&major, \
326			&minor, \
327			&diskio_stats_ptr->read_bytes, \
328	pajs	1.11	&diskio_stats_ptr->write_bytes))!=4) {
329			continue;
330			}
331	pajs	1.10
332			if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
333
334			switch(major){
335	pajs	1.11	case 2:
336			if(minor==0){
337			diskio_stats_ptr->disk_name=strdup("fd0");
338			}
339			break;
340
341	pajs	1.10	case 3:
342			if(minor==0){
343			diskio_stats_ptr->disk_name=strdup("hda");
344			}else{
345			diskio_stats_ptr->disk_name=strdup("hdb");
346			}
347			break;
348
349			case 22:
350			if(minor==0){
351			diskio_stats_ptr->disk_name=strdup("hdc");
352			}else{
353			diskio_stats_ptr->disk_name=strdup("hdd");
354			}
355	pajs	1.11	break;
356	pajs	1.10	case 8:
357			dev_letter='a'+(minor/16);
358			diskio_stats_ptr->disk_name=malloc(4);
359			snprintf(diskio_stats_ptr->disk_name, 4, "sd%c", dev_letter);
360	pajs	1.11	break;
361	pajs	1.10	default:
362			/* I have no idea what it is then :) */
363			diskio_stats_ptr->disk_name=malloc(16);
364			snprintf(diskio_stats_ptr->disk_name, 16, "%d %d", major, minor);
365	pajs	1.11	break;
366	pajs	1.10	}
367
368			num_diskio++;
369			}
370
371			#endif
372	pajs	1.5	*entries=num_diskio;
373	pajs	1.4
374			return diskio_stats;
375	pajs	1.5	}
376
377	pajs	1.6	diskio_stat_t get_diskio_stats_diff(int entries){
378	pajs	1.5	static diskio_stat_t *diskio_stats_diff=NULL;
379			static int sizeof_diskio_stats_diff=0;
380			diskio_stat_t diskio_stats_diff_ptr, diskio_stats_ptr;
381			int disks, x, y;
382
383			if(diskio_stats==NULL){
384			diskio_stats_ptr=get_diskio_stats(&disks);
385			*entries=disks;
386			return diskio_stats_ptr;
387			}
388
389			diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
390			if(diskio_stats_diff==NULL){
391			return NULL;
392			}
393
394			diskio_stats_diff_ptr=diskio_stats_diff;
395			diskio_stats_ptr=diskio_stats;
396
397			for(disks=0;disks<num_diskio;disks++){
398			if(diskio_stats_diff_ptr->disk_name!=NULL){
399			free(diskio_stats_diff_ptr->disk_name);
400			}
401			diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
402			diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
403			diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
404			diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;
405
406			diskio_stats_diff_ptr++;
407			diskio_stats_ptr++;
408			}
409
410			diskio_stats_ptr=get_diskio_stats(&disks);
411			diskio_stats_diff_ptr=diskio_stats_diff;
412
413			for(x=0;x<sizeof_diskio_stats_diff;x++){
414
415			if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
416			diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
417			diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
418			diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
419			}else{
420			diskio_stats_ptr=diskio_stats;
421			for(y=0;y<disks;y++){
422			if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
423			diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
424			diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
425			diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
426
427			break;
428			}
429
430			diskio_stats_ptr++;
431			}
432			}
433
434			diskio_stats_ptr++;
435			diskio_stats_diff_ptr++;
436
437			}
438	pajs	1.8
439			*entries=sizeof_diskio_stats_diff;
440	pajs	1.5	return diskio_stats_diff;
441	pajs	1.2	}