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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 1.73 by tdb, Mon Nov 1 18:30:17 2004 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 <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>
32	–	#include <sys/types.h>
38		#include <sys/statvfs.h>
39	+	#include <kstat.h>
40	+	#define VALID_FS_TYPES {"ufs", "tmpfs", "vxfs"}
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	>	#endif
47
48	+	#ifdef LINUX
49	+	#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \
50	+	"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \
51	+	"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \
52	+	"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \
53	+	"umsdos", "vfat", "xfs", "jfs"}
54		#endif
55
56	<	#define START_VAL 1
56	>	#ifdef CYGWIN
57	>	#define VALID_FS_TYPES {"user"}
58	>	#endif
59
60	<	char *copy_string(char *orig_ptr, const char *newtext){
60	>	#ifdef ALLBSD
61	>	#include <sys/param.h>
62	>	#include <sys/ucred.h>
63	>	#include <sys/mount.h>
64	>	#endif
65	>	#if defined(FREEBSD) || defined(DFBSD)
66	>	#include <sys/dkstat.h>
67	>	#include <devstat.h>
68	>	#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \
69	>	"ufs", "mfs"}
70	>	#endif
71	>	#if defined(NETBSD) || defined(OPENBSD)
72	>	#include <sys/param.h>
73	>	#include <sys/sysctl.h>
74	>	#include <sys/disk.h>
75	>	#define VALID_FS_TYPES {"ffs", "mfs", "msdos", "lfs", "adosfs", "ext2fs", \
76	>	"ntfs"}
77	>	#endif
78
79	<	/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
80	<	orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
81	<	if(orig_ptr==NULL){
82	<	return NULL;
83	<	}
84	<	strcpy(orig_ptr, newtext);
79	>	#ifdef HPUX
80	>	#include <sys/param.h>
81	>	#include <sys/pstat.h>
82	>	#include <sys/types.h>
83	>	#include <sys/stat.h>
84	>	#include <sys/vfs.h>
85	>	#include <mntent.h>
86	>	#include <dirent.h>
87	>	#include <stdio.h>
88	>	#include <time.h>
89	>	#define VALID_FS_TYPES {"vxfs", "hfs"}
90	>	#endif
91
92	<	return orig_ptr;
92	>	static void disk_stat_init(sg_fs_stats *d) {
93	>	d->device_name = NULL;
94	>	d->fs_type = NULL;
95	>	d->mnt_point = NULL;
96		}
97
98	+	static void disk_stat_destroy(sg_fs_stats *d) {
99	+	free(d->device_name);
100	+	free(d->fs_type);
101	+	free(d->mnt_point);
102	+	}
103
104	<	void init_disk_stat(int start, int end, disk_stat_t *disk_stats){
104	>	static int is_valid_fs_type(const char *type) {
105	>	const char *types[] = VALID_FS_TYPES;
106	>	int i;
107
108	<	for(disk_stats+=start; start<=end; start++){
109	<	disk_stats->device_name=NULL;
110	<	disk_stats->fs_type=NULL;
111	<	disk_stats->mnt_point=NULL;
60	<
61	<	disk_stats++;
108	>	for (i = 0; i < (sizeof types / sizeof *types); i++) {
109	>	if (strcmp(types[i], type) == 0) {
110	>	return 1;
111	>	}
112		}
113	<
113	>	return 0;
114		}
115
116	<	disk_stat_t *get_disk_stats(int *entries){
116	>	sg_fs_stats *sg_get_fs_stats(int *entries){
117	>	VECTOR_DECLARE_STATIC(disk_stats, sg_fs_stats, 10,
118	>	disk_stat_init, disk_stat_destroy);
119
120	<	static disk_stat_t *disk_stats;
121	<	static int watermark=-1;
120	>	int valid_type;
121	>	int num_disks=0;
122	>	#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN) || defined(HPUX)
123	>	FILE *f;
124	>	#endif
125
126	<	char *fs_types[] = VALID_FS_TYPES;
72	<	int x, valid_type;
126	>	sg_fs_stats *disk_ptr;
127
128	<	int num_disks=0;
128	>	#ifdef SOLARIS
129		struct mnttab mp;
130		struct statvfs fs;
131	<	FILE *f;
131	>	#endif
132	>	#if defined(LINUX) || defined(CYGWIN) || defined(HPUX)
133	>	struct mntent *mp;
134	>	struct statfs fs;
135	>	#endif
136	>	#ifdef ALLBSD
137	>	int nummnt;
138	>	#ifdef HAVE_STATVFS
139	>	struct statvfs *mp;
140	>	#else
141	>	struct statfs *mp;
142	>	#endif
143	>	#endif
144
145	<	disk_stat_t *disk_ptr;
145	>	#ifdef ALLBSD
146	>	nummnt=getmntinfo(&mp , MNT_LOCAL);
147	>	if (nummnt<=0){
148	>	sg_set_error_with_errno(SG_ERROR_GETMNTINFO, NULL);
149	>	return NULL;
150	>	}
151	>	for(;nummnt--; mp++){
152	>	valid_type = is_valid_fs_type(mp->f_fstypename);
153	>	#endif
154
155	<	if(watermark==-1){
156	<	disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
157	<	if(disk_stats==NULL){
158	<	return NULL;
159	<	}
160	<	watermark=START_VAL;
161	<	init_disk_stat(0, watermark-1, disk_stats);
155	>	#if defined(LINUX) || defined(CYGWIN) || defined(HPUX)
156	>	#ifdef MNT_MNTTAB
157	>	if ((f=setmntent(MNT_MNTTAB, "r" ))==NULL){
158	>	#else
159	>	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
160	>	#endif
161	>	sg_set_error(SG_ERROR_SETMNTENT, NULL);
162	>	return NULL;
163		}
164
165	+	while((mp=getmntent(f))){
166	+	if((statfs(mp->mnt_dir, &fs)) !=0){
167	+	continue;
168	+	}
169
170	+	valid_type = is_valid_fs_type(mp->mnt_type);
171	+	#endif
172	+
173	+	#ifdef SOLARIS
174		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
175	+	sg_set_error_with_errno(SG_ERROR_OPEN, "/etc/mnttab");
176		return NULL;
177		}
178		while((getmntent(f, &mp)) == 0){
179		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
180		continue;
181		}
182	+	valid_type = is_valid_fs_type(mp.mnt_fstype);
183	+	#endif
184
185	<	valid_type=0;
186	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
187	<	if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
102	<	valid_type=1;
103	<	break;
185	>	if(valid_type){
186	>	if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) {
187	>	return NULL;
188		}
189	<	}
189	>	disk_ptr=disk_stats+num_disks;
190
191	<	if(valid_type){
192	<	if(num_disks>watermark-1){
193	<	disk_ptr=disk_stats;
194	<	if((disk_stats=realloc(disk_stats, (watermark*2 * sizeof(disk_stat_t))))==NULL){
195	<	disk_stats=disk_ptr;
196	<	return NULL;
197	<	}
191	>	#ifdef ALLBSD
192	>	if (sg_update_string(&disk_ptr->device_name, mp->f_mntfromname) < 0) {
193	>	return NULL;
194	>	}
195	>	if (sg_update_string(&disk_ptr->fs_type, mp->f_fstypename) < 0) {
196	>	return NULL;
197	>	}
198	>	if (sg_update_string(&disk_ptr->mnt_point, mp->f_mntonname) < 0) {
199	>	return NULL;
200	>	}
201
202	<	watermark=watermark*2;
203	<	init_disk_stat(num_disks, watermark-1, disk_stats);
202	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
203	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
204	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
205	>
206	>	disk_ptr->total_inodes=(long long)mp->f_files;
207	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
208	>	/* Freebsd doesn't have a "available" inodes */
209	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
210	>	#endif
211	>	#if defined(LINUX) || defined(CYGWIN) || defined(HPUX)
212	>	if (sg_update_string(&disk_ptr->device_name, mp->mnt_fsname) < 0) {
213	>	return NULL;
214		}
215	+
216	+	if (sg_update_string(&disk_ptr->fs_type, mp->mnt_type) < 0) {
217	+	return NULL;
218	+	}
219
220	<	disk_ptr=disk_stats+num_disks;
221	<
222	<	/* Memory leak in event of realloc failing */
220	>	if (sg_update_string(&disk_ptr->mnt_point, mp->mnt_dir) < 0) {
221	>	return NULL;
222	>	}
223	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
224	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
225	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
226	>
227	>	disk_ptr->total_inodes=(long long)fs.f_files;
228	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
229	>	/* Linux doesn't have a "available" inodes */
230	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
231	>	#endif
232	>
233	>	#ifdef SOLARIS
234		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
235	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
236	<	of a k each */
237	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
235	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
236	>	* be upwards of a k each
237	>	*/
238	>	if (sg_update_string(&disk_ptr->device_name, mp.mnt_special) < 0) {
239		return NULL;
240		}
241
242	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
243	<	return NULL;
244	<	}
242	>	if (sg_update_string(&disk_ptr->fs_type, mp.mnt_fstype) < 0) {
243	>	return NULL;
244	>	}
245
246	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
247	<	return NULL;
248	<	}
246	>	if (sg_update_string(&disk_ptr->mnt_point, mp.mnt_mountp) < 0) {
247	>	return NULL;
248	>	}
249
250		disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks;
251		disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail;
#	Line 141 | Line 254 | disk_stat_t *get_disk_stats(int *entries){
254		disk_ptr->total_inodes=(long long)fs.f_files;
255		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
256		disk_ptr->free_inodes=(long long)fs.f_favail;
257	<
257	>	#endif
258		num_disks++;
259		}
260		}
261
262		*entries=num_disks;
263
264	<	/* If this fails, there is very little i can do about it, so i'll ignore it :) */
264	>	/* If this fails, there is very little i can do about it, so
265	>	I'll ignore it :) */
266	>	#if defined(LINUX) || defined(CYGWIN) || defined(HPUX)
267	>	endmntent(f);
268	>	#endif
269	>	#if defined(SOLARIS)
270		fclose(f);
271	+	#endif
272
273		return disk_stats;
274
275		}
276
277	<	diskio_stat_t *get_diskio_stats(int *entries){
277	>	int sg_fs_compare_device_name(const void *va, const void *vb) {
278	>	const sg_fs_stats *a = (const sg_fs_stats *)va;
279	>	const sg_fs_stats *b = (const sg_fs_stats *)vb;
280
281	<	/* Do jibble */
281	>	return strcmp(a->device_name, b->device_name);
282	>	}
283	>
284	>	int sg_fs_compare_mnt_point(const void *va, const void *vb) {
285	>	const sg_fs_stats *a = (const sg_fs_stats *)va;
286	>	const sg_fs_stats *b = (const sg_fs_stats *)vb;
287	>
288	>	return strcmp(a->mnt_point, b->mnt_point);
289	>	}
290	>
291	>	static void diskio_stat_init(sg_disk_io_stats *d) {
292	>	d->disk_name = NULL;
293	>	}
294	>
295	>	static void diskio_stat_destroy(sg_disk_io_stats *d) {
296	>	free(d->disk_name);
297	>	}
298	>
299	>	VECTOR_DECLARE_STATIC(diskio_stats, sg_disk_io_stats, 10,
300	>	diskio_stat_init, diskio_stat_destroy);
301	>
302	>	#ifdef LINUX
303	>	typedef struct {
304	>	int major;
305	>	int minor;
306	>	} partition;
307	>	#endif
308	>
309	>	sg_disk_io_stats *sg_get_disk_io_stats(int *entries){
310	>	int num_diskio;
311	>	#ifndef LINUX
312	>	sg_disk_io_stats *diskio_stats_ptr;
313	>	#endif
314	>
315	>	#ifdef HPUX
316	>	long long rbytes = 0, wbytes = 0;
317	>	struct dirent *dinfo = NULL;
318	>	struct stat lstatinfo;
319	>	struct pst_diskinfo pstat_diskinfo;
320	>	char fullpathbuf[1024] = {0};
321	>	dev_t diskid;
322	>	DIR *dh = NULL;
323	>	int disknum = 0;
324	>	#endif
325	>	#ifdef SOLARIS
326	>	kstat_ctl_t *kc;
327	>	kstat_t *ksp;
328	>	kstat_io_t kios;
329	>	#endif
330	>	#ifdef LINUX
331	>	FILE *f;
332	>	char *line_ptr;
333	>	int major, minor;
334	>	int has_pp_stats = 1;
335	>	VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL);
336	>	int i, n;
337	>	time_t now;
338	>	const char *format;
339	>	#endif
340	>	#if defined(FREEBSD) || defined(DFBSD)
341	>	static struct statinfo stats;
342	>	static int stats_init = 0;
343	>	int counter;
344	>	struct device_selection *dev_sel = NULL;
345	>	int n_selected, n_selections;
346	>	long sel_gen;
347	>	struct devstat *dev_ptr;
348	>	#endif
349	>	#ifdef NETBSD
350	>	struct disk_sysctl *stats;
351	>	#endif
352	>	#ifdef OPENBSD
353	>	int diskcount;
354	>	char *disknames, *name, *bufpp;
355	>	char **dk_name;
356	>	struct diskstats *stats;
357	>	#endif
358	>	#ifdef NETBSD
359	>	#define MIBSIZE 3
360	>	#endif
361	>	#ifdef OPENBSD
362	>	#define MIBSIZE 2
363	>	#endif
364	>	#if defined(NETBSD) || defined(OPENBSD)
365	>	int num_disks, i;
366	>	int mib[MIBSIZE];
367	>	size_t size;
368	>	#endif
369	>
370	>	num_diskio=0;
371	>
372	>	#ifdef HPUX
373	>
374	>	/* The "128" here is arbitrary, it can be increased to any number
375	>	at the expense of only more system calls to pstat(). */
376	>	for (disknum = 0; disknum < 128; disknum++) {
377	>	if (pstat_getdisk(&pstat_diskinfo, sizeof(pstat_diskinfo), 1, disknum) == -1) {
378	>	break;
379	>	}
380	>
381	>	if (pstat_diskinfo.psd_idx != disknum) {
382	>	continue;
383	>	}
384	>
385	>	/* Skip "disabled" disks.. */
386	>	if (pstat_diskinfo.psd_status == 0) {
387	>	continue;
388	>	}
389	>
390	>	/* We can't seperate the reads from the writes, we'll
391	>	just give half to each. */
392	>	rbytes = wbytes = (pstat_diskinfo.psd_dkwds * 64);
393	>
394	>	/* Skip unused disks. */
395	>	if (rbytes == 0 && wbytes == 0) {
396	>	continue;
397	>	}
398	>
399	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
400	>	return NULL;
401	>	}
402	>
403	>	diskio_stats_ptr = diskio_stats + num_diskio;
404	>
405	>	diskio_stats_ptr->read_bytes = rbytes;
406	>	diskio_stats_ptr->write_bytes = wbytes;
407	>
408	>	diskio_stats_ptr->systime = time(NULL);
409	>
410	>	num_diskio++;
411	>
412	>	if (diskio_stats_ptr->disk_name == NULL) {
413	>	dh = opendir("/dev/dsk");
414	>	if (dh == NULL) {
415	>	continue;
416	>	}
417	>
418	>	diskid = (pstat_diskinfo.psd_dev.psd_major << 24) | pstat_diskinfo.psd_dev.psd_minor;
419	>	while (1) {
420	>	dinfo = readdir(dh);
421	>	if (dinfo == NULL) {
422	>	break;
423	>	}
424	>	snprintf(fullpathbuf, sizeof(fullpathbuf), "/dev/dsk/%s", dinfo->d_name);
425	>	if (lstat(fullpathbuf, &lstatinfo) < 0) {
426	>	continue;
427	>	}
428	>
429	>	if (lstatinfo.st_rdev == diskid) {
430	>	if (sg_update_string(&diskio_stats_ptr->disk_name, dinfo->d_name) < 0) {
431	>	return NULL;
432	>	}
433	>	break;
434	>	}
435	>	}
436	>	closedir(dh);
437	>
438	>	if (diskio_stats_ptr->disk_name == NULL) {
439	>	if (sg_update_string(&diskio_stats_ptr->disk_name, pstat_diskinfo.psd_hw_path.psh_name) < 0) {
440	>	return NULL;
441	>	}
442	>	}
443	>	}
444	>	}
445	>	#endif
446	>	#ifdef OPENBSD
447	>	mib[0] = CTL_HW;
448	>	mib[1] = HW_DISKCOUNT;
449	>
450	>	size = sizeof(diskcount);
451	>	if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) {
452	>	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKCOUNT");
453	>	return NULL;
454	>	}
455	>
456	>	mib[0] = CTL_HW;
457	>	mib[1] = HW_DISKNAMES;
458	>
459	>	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
460	>	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKNAMES");
461	>	return NULL;
462	>	}
463	>
464	>	disknames = sg_malloc(size);
465	>	if (disknames == NULL) {
466	>	return NULL;
467	>	}
468	>
469	>	if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) {
470	>	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKNAMES");
471	>	return NULL;
472	>	}
473	>
474	>	dk_name = sg_malloc(diskcount * sizeof(char *));
475	>	bufpp = disknames;
476	>	for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) {
477	>	dk_name[i] = name;
478	>	}
479	>	#endif
480	>
481	>	#if defined(NETBSD) || defined(OPENBSD)
482	>	mib[0] = CTL_HW;
483	>	mib[1] = HW_DISKSTATS;
484	>	#ifdef NETBSD
485	>	mib[2] = sizeof(struct disk_sysctl);
486	>	#endif
487	>
488	>	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
489	>	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKSTATS");
490	>	return NULL;
491	>	}
492	>
493	>	#ifdef NETBSD
494	>	num_disks = size / sizeof(struct disk_sysctl);
495	>	#else
496	>	num_disks = size / sizeof(struct diskstats);
497	>	#endif
498	>
499	>	stats = sg_malloc(size);
500	>	if (stats == NULL) {
501	>	return NULL;
502	>	}
503	>
504	>	if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) {
505	>	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKSTATS");
506	>	return NULL;
507	>	}
508	>
509	>	for (i = 0; i < num_disks; i++) {
510	>	const char *name;
511	>	u_int64_t rbytes, wbytes;
512	>
513	>	#ifdef NETBSD
514	>	#ifdef HAVE_DK_RBYTES
515	>	rbytes = stats[i].dk_rbytes;
516	>	wbytes = stats[i].dk_wbytes;
517	>	#else
518	>	/* Before 2.0, NetBSD merged reads and writes. */
519	>	rbytes = wbytes = stats[i].dk_bytes;
520	>	#endif
521	>	#else
522	>	#ifdef HAVE_DS_RBYTES
523	>	rbytes = stats[i].ds_rbytes;
524	>	wbytes = stats[i].ds_wbytes;
525	>	#else
526	>	/* Before 3.5, OpenBSD merged reads and writes */
527	>	rbytes = wbytes = stats[i].ds_bytes;
528	>	#endif
529	>	#endif
530	>
531	>	/* Don't keep stats for disks that have never been used. */
532	>	if (rbytes == 0 && wbytes == 0) {
533	>	continue;
534	>	}
535	>
536	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
537	>	return NULL;
538	>	}
539	>	diskio_stats_ptr = diskio_stats + num_diskio;
540	>
541	>	diskio_stats_ptr->read_bytes = rbytes;
542	>	diskio_stats_ptr->write_bytes = wbytes;
543	>	#ifdef NETBSD
544	>	name = stats[i].dk_name;
545	>	#else
546	>	name = dk_name[i];
547	>	#endif
548	>	if (sg_update_string(&diskio_stats_ptr->disk_name, name) < 0) {
549	>	return NULL;
550	>	}
551	>	diskio_stats_ptr->systime = time(NULL);
552	>
553	>	num_diskio++;
554	>	}
555	>
556	>	free(stats);
557	>	#ifdef OPENBSD
558	>	free(dk_name);
559	>	free(disknames);
560	>	#endif
561	>	#endif
562	>
563	>	#if defined(FREEBSD) || defined(DFBSD)
564	>	if (!stats_init) {
565	>	stats.dinfo=sg_malloc(sizeof(struct devinfo));
566	>	if(stats.dinfo==NULL) return NULL;
567	>	bzero(stats.dinfo, sizeof(struct devinfo));
568	>	stats_init = 1;
569	>	}
570	>	#ifdef FREEBSD5
571	>	if ((devstat_getdevs(NULL, &stats)) < 0) {
572	>	/* FIXME devstat functions return a string error in
573	>	devstat_errbuf */
574	>	sg_set_error(SG_ERROR_DEVSTAT_GETDEVS, NULL);
575	>	return NULL;
576	>	}
577	>	/* Not aware of a get all devices, so i said 999. If we ever
578	>	* find a machine with more than 999 disks, then i'll change
579	>	* this number :)
580	>	*/
581	>	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) {
582	>	sg_set_error(SG_ERROR_DEVSTAT_SELECTDEVS, NULL);
583	>	return NULL;
584	>	}
585	>	#else
586	>	if ((getdevs(&stats)) < 0) {
587	>	sg_set_error(SG_ERROR_DEVSTAT_GETDEVS, NULL);
588	>	return NULL;
589	>	}
590	>	/* Not aware of a get all devices, so i said 999. If we ever
591	>	* find a machine with more than 999 disks, then i'll change
592	>	* this number :)
593	>	*/
594	>	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) {
595	>	sg_set_error(SG_ERROR_DEVSTAT_SELECTDEVS, NULL);
596	>	return NULL;
597	>	}
598	>	#endif
599	>
600	>	for(counter=0;counter<stats.dinfo->numdevs;counter++){
601	>	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
602	>
603	>	/* Throw away devices that have done nothing, ever.. Eg "odd"
604	>	* devices.. like mem, proc.. and also doesn't report floppy
605	>	* drives etc unless they are doing stuff :)
606	>	*/
607	>	#ifdef FREEBSD5
608	>	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
609	>	#else
610	>	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
611	>	#endif
612	>
613	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
614	>	return NULL;
615	>	}
616	>	diskio_stats_ptr=diskio_stats+num_diskio;
617	>
618	>	#ifdef FREEBSD5
619	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
620	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
621	>	#else
622	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
623	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
624	>	#endif
625	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
626	>	if (asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number) == -1) {
627	>	sg_set_error_with_errno(SG_ERROR_ASPRINTF, NULL);
628	>	return NULL;
629	>	}
630	>	diskio_stats_ptr->systime=time(NULL);
631	>
632	>	num_diskio++;
633	>	}
634	>	free(dev_sel);
635	>
636	>	#endif
637	>	#ifdef SOLARIS
638	>	if ((kc = kstat_open()) == NULL) {
639	>	sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
640	>	return NULL;
641	>	}
642	>
643	>	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
644	>	if (!strcmp(ksp->ks_class, "disk")) {
645	>
646	>	if(ksp->ks_type != KSTAT_TYPE_IO) continue;
647	>	/* We dont want metadevices appearins as num_diskio */
648	>	if(strcmp(ksp->ks_module, "md")==0) continue;
649	>	if((kstat_read(kc, ksp, &kios))==-1){
650	>	}
651	>
652	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
653	>	kstat_close(kc);
654	>	return NULL;
655	>	}
656	>	diskio_stats_ptr=diskio_stats+num_diskio;
657	>
658	>	diskio_stats_ptr->read_bytes=kios.nread;
659	>	diskio_stats_ptr->write_bytes=kios.nwritten;
660	>	if (sg_update_string(&diskio_stats_ptr->disk_name,
661	>	sg_get_svr_from_bsd(ksp->ks_name)) < 0) {
662	>	return NULL;
663	>	}
664	>	diskio_stats_ptr->systime=time(NULL);
665	>
666	>	num_diskio++;
667	>	}
668	>	}
669	>
670	>	kstat_close(kc);
671	>	#endif
672	>
673	>	#ifdef LINUX
674	>	num_diskio = 0;
675	>	n = 0;
676	>
677	>	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
678	>	have statistics in here too, so we can use those directly.
679	>	2.6 kernels have /proc/diskstats instead with almost (but not quite)
680	>	the same format. */
681	>
682	>	f = fopen("/proc/diskstats", "r");
683	>	format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld";
684	>	if (f == NULL) {
685	>	f = fopen("/proc/partitions", "r");
686	>	format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld";
687	>	}
688	>	if (f == NULL) goto out;
689	>	now = time(NULL);
690	>
691	>	while ((line_ptr = sg_f_read_line(f, "")) != NULL) {
692	>	char name[100];
693	>	char *s;
694	>	long long rsect, wsect;
695	>
696	>	int nr = sscanf(line_ptr, format,
697	>	&major, &minor, name, &rsect, &wsect);
698	>	if (nr < 3) continue;
699	>
700	>	/* Skip device names ending in numbers, since they're
701	>	partitions. */
702	>	s = name;
703	>	while (*s != '\0') s++;
704	>	--s;
705	>	if (*s >= '0' && *s <= '9') continue;
706	>
707	>	if (nr < 5) {
708	>	has_pp_stats = 0;
709	>	rsect = 0;
710	>	wsect = 0;
711	>	}
712	>
713	>	if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) {
714	>	goto out;
715	>	}
716	>	if (VECTOR_RESIZE(parts, n + 1) < 0) {
717	>	goto out;
718	>	}
719	>
720	>	if (sg_update_string(&diskio_stats[n].disk_name, name) < 0) {
721	>	goto out;
722	>	}
723	>	diskio_stats[n].read_bytes = rsect * 512;
724	>	diskio_stats[n].write_bytes = wsect * 512;
725	>	diskio_stats[n].systime = now;
726	>	parts[n].major = major;
727	>	parts[n].minor = minor;
728	>
729	>	n++;
730	>	}
731	>
732	>	fclose(f);
733	>	f = NULL;
734	>
735	>	if (!has_pp_stats) {
736	>	/* This is an older kernel where /proc/partitions doesn't
737	>	contain stats. Read what we can from /proc/stat instead, and
738	>	fill in the appropriate bits of the list allocated above. */
739	>
740	>	f = fopen("/proc/stat", "r");
741	>	if (f == NULL) goto out;
742	>	now = time(NULL);
743	>
744	>	line_ptr = sg_f_read_line(f, "disk_io:");
745	>	if (line_ptr == NULL) goto out;
746	>
747	>	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
748	>	long long rsect, wsect;
749	>
750	>	if (*++line_ptr == '\0') break;
751	>
752	>	if((sscanf(line_ptr,
753	>	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
754	>	&major, &minor, &rsect, &wsect)) != 4) {
755	>	continue;
756	>	}
757	>
758	>	/* Find the corresponding device from earlier.
759	>	Just to add to the fun, "minor" is actually the disk
760	>	number, not the device minor, so we need to figure
761	>	out the real minor number based on the major!
762	>	This list is not exhaustive; if you're running
763	>	an older kernel you probably don't have fancy
764	>	I2O hardware anyway... */
765	>	switch (major) {
766	>	case 3:
767	>	case 21:
768	>	case 22:
769	>	case 33:
770	>	case 34:
771	>	case 36:
772	>	case 56:
773	>	case 57:
774	>	case 88:
775	>	case 89:
776	>	case 90:
777	>	case 91:
778	>	minor *= 64;
779	>	break;
780	>	case 9:
781	>	case 43:
782	>	break;
783	>	default:
784	>	minor *= 16;
785	>	break;
786	>	}
787	>	for (i = 0; i < n; i++) {
788	>	if (major == parts[i].major
789	>	&& minor == parts[i].minor)
790	>	break;
791	>	}
792	>	if (i == n) continue;
793	>
794	>	/* We read the number of blocks. Blocks are stored in
795	>	512 bytes */
796	>	diskio_stats[i].read_bytes = rsect * 512;
797	>	diskio_stats[i].write_bytes = wsect * 512;
798	>	diskio_stats[i].systime = now;
799	>	}
800	>	}
801	>
802	>	num_diskio = n;
803	>	out:
804	>	if (f != NULL) fclose(f);
805	>	#endif
806	>
807	>	#ifdef CYGWIN
808	>	sg_set_error(SG_ERROR_UNSUPPORTED, "Cygwin");
809		return NULL;
810	+	#endif
811	+
812	+	*entries=num_diskio;
813	+
814	+	return diskio_stats;
815		}
816	+
817	+	sg_disk_io_stats *sg_get_disk_io_stats_diff(int *entries){
818	+	VECTOR_DECLARE_STATIC(diff, sg_disk_io_stats, 1,
819	+	diskio_stat_init, diskio_stat_destroy);
820	+	sg_disk_io_stats *src = NULL, *dest;
821	+	int i, j, diff_count, new_count;
822	+
823	+	if (diskio_stats == NULL) {
824	+	/* No previous stats, so we can't calculate a difference. */
825	+	return sg_get_disk_io_stats(entries);
826	+	}
827	+
828	+	/* Resize the results array to match the previous stats. */
829	+	diff_count = VECTOR_SIZE(diskio_stats);
830	+	if (VECTOR_RESIZE(diff, diff_count) < 0) {
831	+	return NULL;
832	+	}
833	+
834	+	/* Copy the previous stats into the result. */
835	+	for (i = 0; i < diff_count; i++) {
836	+	src = &diskio_stats[i];
837	+	dest = &diff[i];
838	+
839	+	if (sg_update_string(&dest->disk_name, src->disk_name) < 0) {
840	+	return NULL;
841	+	}
842	+	dest->read_bytes = src->read_bytes;
843	+	dest->write_bytes = src->write_bytes;
844	+	dest->systime = src->systime;
845	+	}
846	+
847	+	/* Get a new set of stats. */
848	+	if (sg_get_disk_io_stats(&new_count) == NULL) {
849	+	return NULL;
850	+	}
851	+
852	+	/* For each previous stat... */
853	+	for (i = 0; i < diff_count; i++) {
854	+	dest = &diff[i];
855	+
856	+	/* ... find the corresponding new stat ... */
857	+	for (j = 0; j < new_count; j++) {
858	+	/* Try the new stat in the same position first,
859	+	since that's most likely to be it. */
860	+	src = &diskio_stats[(i + j) % new_count];
861	+	if (strcmp(src->disk_name, dest->disk_name) == 0) {
862	+	break;
863	+	}
864	+	}
865	+	if (j == new_count) {
866	+	/* No match found. */
867	+	continue;
868	+	}
869	+
870	+	/* ... and subtract the previous stat from it to get the
871	+	difference. */
872	+	dest->read_bytes = src->read_bytes - dest->read_bytes;
873	+	dest->write_bytes = src->write_bytes - dest->write_bytes;
874	+	dest->systime = src->systime - dest->systime;
875	+	}
876	+
877	+	*entries = diff_count;
878	+	return diff;
879	+	}
880	+
881	+	int sg_disk_io_compare_name(const void *va, const void *vb) {
882	+	const sg_disk_io_stats *a = (const sg_disk_io_stats *)va;
883	+	const sg_disk_io_stats *b = (const sg_disk_io_stats *)vb;
884	+
885	+	return strcmp(a->disk_name, b->disk_name);
886	+	}
887	+

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