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root/i-scream/projects/libstatgrab/src/libstatgrab/disk_stats.c

Comparing projects/libstatgrab/src/libstatgrab/disk_stats.c (file contents):
Revision 1.3 by tdb, Thu Feb 20 13:19:52 2003 UTC vs.
Revision 1.33 by ats, Sun Oct 19 11:23:21 2003 UTC

#	Line 1 | Line 1
1		/*
2		* i-scream central monitoring system
3	<	* http://www.i-scream.org.uk
4	<	* Copyright (C) 2000-2002 i-scream
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2003 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
#	Line 22 | Line 22
22		#include "config.h"
23		#endif
24
25	–	#include "statgrab.h"
26	–	#include <stdlib.h>
25		#include <stdio.h>
26	+	#include <stdlib.h>
27		#include <string.h>
28	+	#include "statgrab.h"
29
30		#ifdef SOLARIS
31		#include <sys/mnttab.h>
32	–	#include <sys/types.h>
32		#include <sys/statvfs.h>
33	<
33	>	#include <kstat.h>
34		#define VALID_FS_TYPES {"ufs", "tmpfs"}
35	+	#endif
36
37	+	#ifdef LINUX
38	+	#include <time.h>
39	+	#include <sys/vfs.h>
40	+	#include <mntent.h>
41	+	#include "tools.h"
42	+	#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \
43	+	"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \
44	+	"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \
45	+	"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \
46	+	"umsdos", "vfat", "xfs", "jfs"}
47		#endif
48
49	+	#ifdef ALLBSD
50	+	#include <sys/param.h>
51	+	#include <sys/ucred.h>
52	+	#include <sys/mount.h>
53	+	#define VALID_FS_TYPES {"ufs", "mfs", "ffs"}
54	+	#endif
55	+	#ifdef FREEBSD
56	+	#include <sys/dkstat.h>
57	+	#include <devstat.h>
58	+	#endif
59	+
60		#define START_VAL 1
61
62		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 60 | Line 81 | void init_disk_stat(int start, int end, disk_stat_t *d
81
82		disk_stats++;
83		}
63	–
84		}
85
86		disk_stat_t *get_disk_stats(int *entries){
#	Line 70 | Line 90 | disk_stat_t *get_disk_stats(int *entries){
90
91		char *fs_types[] = VALID_FS_TYPES;
92		int x, valid_type;
73	–
93		int num_disks=0;
94	<	struct mnttab mp;
76	<	struct statvfs fs;
94	>	#if defined(LINUX) || defined (SOLARIS)
95		FILE *f;
96	+	#endif
97
98		disk_stat_t *disk_ptr;
99
100	+	#ifdef SOLARIS
101	+	struct mnttab mp;
102	+	struct statvfs fs;
103	+	#endif
104	+	#ifdef LINUX
105	+	struct mntent *mp;
106	+	struct statfs fs;
107	+	#endif
108	+	#ifdef ALLBSD
109	+	int nummnt;
110	+	struct statfs *mp;
111	+	#endif
112	+
113		if(watermark==-1){
114		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
115		if(disk_stats==NULL){
#	Line 86 | Line 118 | disk_stat_t *get_disk_stats(int *entries){
118		watermark=START_VAL;
119		init_disk_stat(0, watermark-1, disk_stats);
120		}
121	+	#ifdef ALLBSD
122	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
123	+	if (nummnt<=0){
124	+	return NULL;
125	+	}
126	+	for(;nummnt--; mp++){
127	+	valid_type=0;
128	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
129	+	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
130	+	valid_type=1;
131	+	break;
132	+	}
133	+	}
134	+	#endif
135
136	+	#ifdef LINUX
137	+	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
138	+	return NULL;
139	+	}
140
141	+	while((mp=getmntent(f))){
142	+	if((statfs(mp->mnt_dir, &fs)) !=0){
143	+	continue;
144	+	}
145	+
146	+	valid_type=0;
147	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
148	+	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
149	+	valid_type=1;
150	+	break;
151	+	}
152	+	}
153	+	#endif
154	+
155	+	#ifdef SOLARIS
156		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
157		return NULL;
158		}
#	Line 95 | Line 160 | disk_stat_t *get_disk_stats(int *entries){
160		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
161		continue;
162		}
98	–
163		valid_type=0;
164		for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
165		if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
#	Line 103 | Line 167 | disk_stat_t *get_disk_stats(int *entries){
167		break;
168		}
169		}
170	+	#endif
171
172		if(valid_type){
173		if(num_disks>watermark-1){
#	Line 117 | Line 182 | disk_stat_t *get_disk_stats(int *entries){
182		}
183
184		disk_ptr=disk_stats+num_disks;
185	<
185	>	#ifdef ALLBSD
186	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
187	>	return NULL;
188	>	}
189	>
190	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
191	>	return NULL;
192	>	}
193	>
194	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
195	>	return NULL;
196	>	}
197	>
198	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
199	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
200	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
201	>
202	>	disk_ptr->total_inodes=(long long)mp->f_files;
203	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
204	>	/* Freebsd doesn't have a "available" inodes */
205	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
206	>	#endif
207	>	#ifdef LINUX
208	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
209	>	return NULL;
210	>	}
211	>
212	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
213	>	return NULL;
214	>	}
215	>
216	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
217	>	return NULL;
218	>	}
219	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
220	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
221	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
222	>
223	>	disk_ptr->total_inodes=(long long)fs.f_files;
224	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
225	>	/* Linux doesn't have a "available" inodes */
226	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
227	>	#endif
228	>
229	>	#ifdef SOLARIS
230		/* Memory leak in event of realloc failing */
231		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
232	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
233	<	of a k each */
232	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
233	>	* be upwards of a k each
234	>	*/
235		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
236		return NULL;
237		}
#	Line 141 | Line 251 | disk_stat_t *get_disk_stats(int *entries){
251		disk_ptr->total_inodes=(long long)fs.f_files;
252		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
253		disk_ptr->free_inodes=(long long)fs.f_favail;
254	<
254	>	#endif
255		num_disks++;
256		}
257		}
#	Line 149 | Line 259 | disk_stat_t *get_disk_stats(int *entries){
259		*entries=num_disks;
260
261		/* If this fails, there is very little i can do about it, so i'll ignore it :) */
262	+	#if defined(LINUX) || defined(SOLARIS)
263		fclose(f);
264	+	#endif
265
266		return disk_stats;
267
268		}
269	+	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
270
271	+	for(diskio_stats+=start; start<end; start++){
272	+	diskio_stats->disk_name=NULL;
273	+
274	+	diskio_stats++;
275	+	}
276	+	}
277	+
278	+	diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
279	+
280	+	if(diskio_stats==NULL){
281	+
282	+	if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
283	+	return NULL;
284	+	}
285	+	diskio_stat_init(0, needed_entries, diskio_stats);
286	+	*cur_entries=needed_entries;
287	+
288	+	return diskio_stats;
289	+	}
290	+
291	+
292	+	if(*cur_entries<needed_entries){
293	+	diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
294	+	if(diskio_stats==NULL){
295	+	return NULL;
296	+	}
297	+	diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
298	+	*cur_entries=needed_entries;
299	+	}
300	+
301	+	return diskio_stats;
302	+	}
303	+
304	+	static diskio_stat_t *diskio_stats=NULL;
305	+	static int num_diskio=0;
306	+
307	+	#ifdef LINUX
308	+	typedef struct {
309	+	int major;
310	+	int minor;
311	+	} partition;
312	+	#endif
313	+
314		diskio_stat_t *get_diskio_stats(int *entries){
315
316	<	/* Do jibble */
317	<	return NULL;
316	>	static int sizeof_diskio_stats=0;
317	>	diskio_stat_t *diskio_stats_ptr;
318	>
319	>	#ifdef SOLARIS
320	>	kstat_ctl_t *kc;
321	>	kstat_t *ksp;
322	>	kstat_io_t kios;
323	>	#endif
324	>	#ifdef LINUX
325	>	FILE *f;
326	>	char *line_ptr;
327	>	int major, minor;
328	>	char dev_letter;
329	>	int has_pp_stats = 1;
330	>	static partition *parts = NULL;
331	>	static int alloc_parts = 0;
332	>	int i, n;
333	>	time_t now;
334	>	#endif
335	>	#ifdef FREEBSD
336	>	static struct statinfo stats;
337	>	static int stats_init = 0;
338	>	int counter;
339	>	struct device_selection *dev_sel = NULL;
340	>	int n_selected, n_selections;
341	>	long sel_gen;
342	>	struct devstat *dev_ptr;
343	>	#endif
344	>	#ifdef NETBSD
345	>	/* FIXME get_diskio_stats NYI on NetBSD.
346	>	* See vmstat/dkstats.c in NetBSD source for examples.
347	>	*/
348	>	#endif
349	>	num_diskio=0;
350	>
351	>	#ifdef FREEBSD
352	>	if (!stats_init) {
353	>	stats.dinfo=malloc(sizeof(struct devinfo));
354	>	if(stats.dinfo==NULL) return NULL;
355	>	bzero(stats.dinfo, sizeof(struct devinfo));
356	>	stats_init = 1;
357	>	}
358	>	#ifdef FREEBSD5
359	>	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
360	>	/* Not aware of a get all devices, so i said 999. If we ever
361	>	* find a machine with more than 999 disks, then i'll change
362	>	* this number :)
363	>	*/
364	>	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;
365	>	#else
366	>	if ((getdevs(&stats)) < 0) return NULL;
367	>	/* Not aware of a get all devices, so i said 999. If we ever
368	>	* find a machine with more than 999 disks, then i'll change
369	>	* this number :)
370	>	*/
371	>	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;
372	>	#endif
373	>
374	>	for(counter=0;counter<stats.dinfo->numdevs;counter++){
375	>	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
376	>
377	>	/* Throw away devices that have done nothing, ever.. Eg "odd"
378	>	* devices.. like mem, proc.. and also doesn't report floppy
379	>	* drives etc unless they are doing stuff :)
380	>	*/
381	>	#ifdef FREEBSD5
382	>	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
383	>	#else
384	>	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
385	>	#endif
386	>	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
387	>	return NULL;
388	>	}
389	>	diskio_stats_ptr=diskio_stats+num_diskio;
390	>
391	>	#ifdef FREEBSD5
392	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
393	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
394	>	#else
395	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
396	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
397	>	#endif
398	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
399	>	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
400	>	diskio_stats_ptr->systime=time(NULL);
401	>
402	>	num_diskio++;
403	>	}
404	>	free(dev_sel);
405	>
406	>	#endif
407	>	#ifdef SOLARIS
408	>	if ((kc = kstat_open()) == NULL) {
409	>	return NULL;
410	>	}
411	>
412	>	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
413	>	if (!strcmp(ksp->ks_class, "disk")) {
414	>
415	>	if(ksp->ks_type != KSTAT_TYPE_IO) continue;
416	>	/* We dont want metadevices appearins as num_diskio */
417	>	if(strcmp(ksp->ks_module, "md")==0) continue;
418	>	if((kstat_read(kc, ksp, &kios))==-1){
419	>	}
420	>
421	>	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
422	>	kstat_close(kc);
423	>	return NULL;
424	>	}
425	>	diskio_stats_ptr=diskio_stats+num_diskio;
426	>
427	>	diskio_stats_ptr->read_bytes=kios.nread;
428	>
429	>	diskio_stats_ptr->write_bytes=kios.nwritten;
430	>
431	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
432	>
433	>	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
434	>	diskio_stats_ptr->systime=time(NULL);
435	>	num_diskio++;
436	>	}
437	>	}
438	>
439	>	kstat_close(kc);
440	>	#endif
441	>
442	>	#ifdef LINUX
443	>	num_diskio = 0;
444	>	n = 0;
445	>
446	>	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
447	>	have statistics in here too, so we can use those directly. */
448	>
449	>	f = fopen("/proc/partitions", "r");
450	>	if (f == NULL) goto out;
451	>	now = time(NULL);
452	>
453	>	while ((line_ptr = f_read_line(f, "")) != NULL) {
454	>	char name[20];
455	>	char *s;
456	>	long long rsect, wsect;
457	>
458	>	int nr = sscanf(line_ptr,
459	>	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
460	>	&major, &minor, name, &rsect, &wsect);
461	>	if (nr < 3) continue;
462	>	if (nr < 5) {
463	>	has_pp_stats = 0;
464	>	rsect = 0;
465	>	wsect = 0;
466	>	}
467	>
468	>	/* Skip device names ending in numbers, since they're
469	>	partitions. */
470	>	s = name;
471	>	while (*s != '\0') s++;
472	>	--s;
473	>	if (*s >= '0' && *s <= '9') continue;
474	>
475	>	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
476	>	diskio_stats);
477	>	if (diskio_stats == NULL) goto out;
478	>	if (n >= alloc_parts) {
479	>	alloc_parts += 16;
480	>	parts = realloc(parts, alloc_parts * sizeof *parts);
481	>	if (parts == NULL) {
482	>	alloc_parts = 0;
483	>	goto out;
484	>	}
485	>	}
486	>
487	>	if (diskio_stats[n].disk_name != NULL)
488	>	free(diskio_stats[n].disk_name);
489	>	diskio_stats[n].disk_name = strdup(name);
490	>	diskio_stats[n].read_bytes = rsect * 512;
491	>	diskio_stats[n].write_bytes = wsect * 512;
492	>	diskio_stats[n].systime = now;
493	>	parts[n].major = major;
494	>	parts[n].minor = minor;
495	>
496	>	n++;
497	>	}
498	>
499	>	if (!has_pp_stats) {
500	>	/* This is an older kernel without stats in /proc/partitions.
501	>	Read what we can from /proc/stat instead. */
502	>
503	>	f = fopen("/proc/stat", "r");
504	>	if (f == NULL) goto out;
505	>	now = time(NULL);
506	>
507	>	line_ptr = f_read_line(f, "disk_io:");
508	>	if (line_ptr == NULL) goto out;
509	>
510	>	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
511	>	long long rsect, wsect;
512	>
513	>	if (*++line_ptr == '\0') break;
514	>
515	>	if((sscanf(line_ptr,
516	>	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
517	>	&major, &minor, &rsect, &wsect)) != 4) {
518	>	continue;
519	>	}
520	>
521	>	/* Find the corresponding device from earlier.
522	>	Just to add to the fun, "minor" is actually the disk
523	>	number, not the device minor, so we need to figure
524	>	out the real minor number based on the major!
525	>	This list is not exhaustive; if you're running
526	>	an older kernel you probably don't have fancy
527	>	I2O hardware anyway... */
528	>	switch (major) {
529	>	case 3:
530	>	case 21:
531	>	case 22:
532	>	case 33:
533	>	case 34:
534	>	case 36:
535	>	case 56:
536	>	case 57:
537	>	case 88:
538	>	case 89:
539	>	case 90:
540	>	case 91:
541	>	minor *= 64;
542	>	break;
543	>	case 9:
544	>	case 43:
545	>	break;
546	>	default:
547	>	minor *= 16;
548	>	break;
549	>	}
550	>	for (i = 0; i < n; i++) {
551	>	if (major == parts[i].major
552	>	&& minor == parts[i].minor)
553	>	break;
554	>	}
555	>	if (i == n) continue;
556	>
557	>	/* We read the number of blocks. Blocks are stored in
558	>	512 bytes */
559	>	diskio_stats[i].read_bytes = rsect * 512;
560	>	diskio_stats[i].write_bytes = wsect * 512;
561	>	diskio_stats[i].systime = now;
562	>	}
563	>	}
564	>
565	>	num_diskio = n;
566	>	out:
567	>	if (f != NULL) fclose(f);
568	>
569	>	#endif
570	>	*entries=num_diskio;
571	>
572	>	return diskio_stats;
573	>	}
574	>
575	>	diskio_stat_t *get_diskio_stats_diff(int *entries){
576	>	static diskio_stat_t *diskio_stats_diff=NULL;
577	>	static int sizeof_diskio_stats_diff=0;
578	>	diskio_stat_t *diskio_stats_diff_ptr, *diskio_stats_ptr;
579	>	int disks, x, y;
580	>
581	>	if(diskio_stats==NULL){
582	>	diskio_stats_ptr=get_diskio_stats(&disks);
583	>	*entries=disks;
584	>	return diskio_stats_ptr;
585	>	}
586	>
587	>	diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
588	>	if(diskio_stats_diff==NULL){
589	>	return NULL;
590	>	}
591	>
592	>	diskio_stats_diff_ptr=diskio_stats_diff;
593	>	diskio_stats_ptr=diskio_stats;
594	>
595	>	for(disks=0;disks<num_diskio;disks++){
596	>	if(diskio_stats_diff_ptr->disk_name!=NULL){
597	>	free(diskio_stats_diff_ptr->disk_name);
598	>	}
599	>	diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
600	>	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
601	>	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
602	>	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;
603	>
604	>	diskio_stats_diff_ptr++;
605	>	diskio_stats_ptr++;
606	>	}
607	>
608	>	diskio_stats_ptr=get_diskio_stats(&disks);
609	>	diskio_stats_diff_ptr=diskio_stats_diff;
610	>
611	>	for(x=0;x<sizeof_diskio_stats_diff;x++){
612	>
613	>	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
614	>	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
615	>	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
616	>	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
617	>	}else{
618	>	diskio_stats_ptr=diskio_stats;
619	>	for(y=0;y<disks;y++){
620	>	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
621	>	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
622	>	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
623	>	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
624	>
625	>	break;
626	>	}
627	>
628	>	diskio_stats_ptr++;
629	>	}
630	>	}
631	>
632	>	diskio_stats_ptr++;
633	>	diskio_stats_diff_ptr++;
634	>
635	>	}
636	>
637	>	*entries=sizeof_diskio_stats_diff;
638	>	return diskio_stats_diff;
639		}

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