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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 1.4 by pajs, Sun Feb 23 19:24:07 2003 UTC vs.
Revision 1.85 by tdb, Mon Oct 9 14:09:38 2006 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
1	>	/*
2	>	* i-scream libstatgrab
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2004 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.
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 program is distributed in the hope that it will be useful,
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
14	<	* GNU General Public License for more details.
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 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.
16	>	* You should have received a copy of the GNU Lesser General Public
17	>	* License along with this library; if not, write to the Free Software
18	>	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19	>	* 02111-1307 USA
20	>	*
21	>	* $Id$
22		*/
23
24		#ifdef HAVE_CONFIG_H
25		#include "config.h"
26		#endif
27
25	–	#include "statgrab.h"
26	–	#include <stdlib.h>
28		#include <stdio.h>
29	<	#include "ukcprog.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>
33	–	#include <sys/types.h>
38		#include <sys/statvfs.h>
39		#include <kstat.h>
40	+	#define VALID_FS_TYPES {"ufs", "tmpfs", "vxfs", "nfs"}
41	+	#endif
42
43	<	#define VALID_FS_TYPES {"ufs", "tmpfs"}
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	<	#define START_VAL 1
57	>	#ifdef CYGWIN
58	>	#define VALID_FS_TYPES {"user"}
59	>	#endif
60
61	<	char *copy_string(char *orig_ptr, const char *newtext){
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"}
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	<	/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
81	<	orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
82	<	if(orig_ptr==NULL){
83	<	return NULL;
84	<	}
85	<	strcpy(orig_ptr, newtext);
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	<	return orig_ptr;
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
111	>	#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	<	void init_disk_stat(int start, int end, disk_stat_t *disk_stats){
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(disk_stats+=start; start<=end; start++){
158	<	disk_stats->device_name=NULL;
159	<	disk_stats->fs_type=NULL;
160	<	disk_stats->mnt_point=NULL;
62	<
63	<	disk_stats++;
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	<	disk_stat_t *get_disk_stats(int *entries){
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	<	static disk_stat_t *disk_stats;
171	<	static int watermark=-1;
170	>	int num_disks=0;
171	>	#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN) || defined(HPUX)
172	>	FILE *f;
173	>	#endif
174
175	<	char *fs_types[] = VALID_FS_TYPES;
73	<	int x, valid_type;
175	>	sg_fs_stats *disk_ptr;
176
177	<	int num_disks=0;
177	>	#ifdef SOLARIS
178		struct mnttab mp;
179		struct statvfs fs;
180	<	FILE *f;
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	<	disk_stat_t *disk_ptr;
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 = &mp; nummnt--; (*fs)++){
209	>	#endif
210
211	<	if(watermark==-1){
212	<	disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
213	<	if(disk_stats==NULL){
214	<	return NULL;
215	<	}
216	<	watermark=START_VAL;
217	<	init_disk_stat(0, watermark-1, disk_stats);
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	<	valid_type=0;
240	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
241	<	if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
242	<	valid_type=1;
243	<	break;
244	<	}
245	<	}
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(valid_type){
252	<	if(num_disks>watermark-1){
253	<	disk_ptr=disk_stats;
254	<	if((disk_stats=realloc(disk_stats, (watermark*2 * sizeof(disk_stat_t))))==NULL){
255	<	disk_stats=disk_ptr;
256	<	return NULL;
114	<	}
115	<
116	<	watermark=watermark*2;
117	<	init_disk_stat(num_disks, watermark-1, disk_stats);
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		}
119	–
258		disk_ptr=disk_stats+num_disks;
259	<
260	<	/* Memory leak in event of realloc failing */
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 woul prob be upwards
263	<	of a k each */
264	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
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	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
276	<	return NULL;
277	<	}
133	<
134	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
135	<	return NULL;
136	<	}
137	<
138	<	disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks;
139	<	disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail;
140	<	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_frsize * (long long)fs.f_bfree);
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=(long long)fs.f_files;
280	<	disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
281	<	disk_ptr->free_inodes=(long long)fs.f_favail;
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 i'll ignore it :) */
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	<	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
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	<	for(diskio_stats+=start; start<end; start++){
162	<	diskio_stats->disk_name=NULL;
163	<
164	<	diskio_stats++;
165	<	}
361	>	return strcmp(a->device_name, b->device_name);
362		}
363
364	<	diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
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	<	if(diskio_stats==NULL){
368	>	return strcmp(a->mnt_point, b->mnt_point);
369	>	}
370
371	<	if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
372	<	return NULL;
373	<	}
175	<	diskio_stat_init(0, needed_entries, diskio_stats);
176	<	*cur_entries=needed_entries;
371	>	static void diskio_stat_init(sg_disk_io_stats *d) {
372	>	d->disk_name = NULL;
373	>	}
374
375	<	return diskio_stats;
376	<	}
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	<	if(*cur_entries<needed_entries){
383	<	diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
384	<	if(diskio_stats==NULL){
385	<	return NULL;
386	<	}
387	<	diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
188	<	*cur_entries=needed_entries;
189	<	}
382	>	#ifdef LINUX
383	>	typedef struct {
384	>	int major;
385	>	int minor;
386	>	} partition;
387	>	#endif
388
389	<	return diskio_stats;
390	<	}
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	<	static diskio_stat_t *diskio_stats=NULL;
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	<	diskio_stat_t *get_diskio_stats(int *entries){
458	>	num_diskio=0;
459
460	<	static int sizeof_diskio_stats=0;
461	<	int disks=0;
462	<	diskio_stat_t *diskio_stats_ptr;
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	<	kstat_ctl_t *kc;
473	<	kstat_t *ksp;
204	<	kstat_io_t kios;
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	<	return NULL;
737	<	}
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	<	fflush(stdout);
212	<	if (!strcmp(ksp->ks_class, "disk")) {
213	<	fflush(stdout);
741	>	if (!strcmp(ksp->ks_class, "disk")) {
742
743		if(ksp->ks_type != KSTAT_TYPE_IO) continue;
744	<	/* We dont want metadevices appearins as disks */
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){
219	<	fflush(stdout);
746	>	if((kstat_read(kc, ksp, &kios))==-1){
747		}
748
749	<	if((diskio_stats=diskio_stat_malloc(disks+1, &sizeof_diskio_stats, diskio_stats))==NULL){
749	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
750		kstat_close(kc);
751		return NULL;
752		}
753	<	diskio_stats_ptr=diskio_stats+disks;
753	>	diskio_stats_ptr=diskio_stats+num_diskio;
754
755		diskio_stats_ptr->read_bytes=kios.nread;
229	–
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	<	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
233	<
234	<	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
235	<	disks++;
236	<	fflush(stdout);
764	>	num_diskio++;
765		}
766		}
767
768		kstat_close(kc);
769	+	#endif
770
771	<	*entries=disks;
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]$", REG_EXTENDED | REG_NOSUB) != 0) {
791	+	sg_set_error(SG_ERROR_PARSE, NULL);
792	+	goto out;
793	+	}
794	+	if (regcomp(&not_part_re, "^(.*/)?[^/0-9]+[0-9]+d[0-9]+$", 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(&not_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	+

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