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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 1.8 by pajs, Sat Mar 1 02:41:54 2003 UTC vs.
Revision 1.69 by tdb, Sun Jun 20 17:00:25 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 <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>
#	Line 34 | Line 40
40		#define VALID_FS_TYPES {"ufs", "tmpfs"}
41		#endif
42
43	<	#define START_VAL 1
43	>	#if defined(LINUX) || defined(CYGWIN)
44	>	#include <mntent.h>
45	>	#include <sys/vfs.h>
46	>	#endif
47
48	<	char *copy_string(char *orig_ptr, const char *newtext){
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	<	/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
57	<	orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
58	<	if(orig_ptr==NULL){
44	<	return NULL;
45	<	}
46	<	strcpy(orig_ptr, newtext);
56	>	#ifdef CYGWIN
57	>	#define VALID_FS_TYPES {"user"}
58	>	#endif
59
60	<	return orig_ptr;
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	>	static void disk_stat_init(sg_fs_stats *d) {
80	>	d->device_name = NULL;
81	>	d->fs_type = NULL;
82	>	d->mnt_point = NULL;
83		}
84
85	+	static void disk_stat_destroy(sg_fs_stats *d) {
86	+	free(d->device_name);
87	+	free(d->fs_type);
88	+	free(d->mnt_point);
89	+	}
90
91	<	void init_disk_stat(int start, int end, disk_stat_t *disk_stats){
91	>	static int is_valid_fs_type(const char *type) {
92	>	const char *types[] = VALID_FS_TYPES;
93	>	int i;
94
95	<	for(disk_stats+=start; start<=end; start++){
96	<	disk_stats->device_name=NULL;
97	<	disk_stats->fs_type=NULL;
98	<	disk_stats->mnt_point=NULL;
58	<
59	<	disk_stats++;
95	>	for (i = 0; i < (sizeof types / sizeof *types); i++) {
96	>	if (strcmp(types[i], type) == 0) {
97	>	return 1;
98	>	}
99		}
100	+	return 0;
101		}
102
103	<	disk_stat_t *get_disk_stats(int *entries){
103	>	sg_fs_stats *sg_get_fs_stats(int *entries){
104	>	VECTOR_DECLARE_STATIC(disk_stats, sg_fs_stats, 10,
105	>	disk_stat_init, disk_stat_destroy);
106
107	<	static disk_stat_t *disk_stats;
108	<	static int watermark=-1;
107	>	int valid_type;
108	>	int num_disks=0;
109	>	#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN)
110	>	FILE *f;
111	>	#endif
112
113	<	char *fs_types[] = VALID_FS_TYPES;
69	<	int x, valid_type;
113	>	sg_fs_stats *disk_ptr;
114
115	<	int num_disks=0;
115	>	#ifdef SOLARIS
116		struct mnttab mp;
117		struct statvfs fs;
118	<	FILE *f;
118	>	#endif
119	>	#if defined(LINUX) || defined(CYGWIN)
120	>	struct mntent *mp;
121	>	struct statfs fs;
122	>	#endif
123	>	#ifdef ALLBSD
124	>	int nummnt;
125	>	struct statfs *mp;
126	>	#endif
127
128	<	disk_stat_t *disk_ptr;
128	>	#ifdef ALLBSD
129	>	nummnt=getmntinfo(&mp , MNT_LOCAL);
130	>	if (nummnt<=0){
131	>	sg_set_error(SG_ERROR_GETMNTINFO, NULL);
132	>	return NULL;
133	>	}
134	>	for(;nummnt--; mp++){
135	>	valid_type = is_valid_fs_type(mp->f_fstypename);
136	>	#endif
137
138	<	if(watermark==-1){
139	<	disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
140	<	if(disk_stats==NULL){
141	<	return NULL;
82	<	}
83	<	watermark=START_VAL;
84	<	init_disk_stat(0, watermark-1, disk_stats);
138	>	#if defined(LINUX) || defined(CYGWIN)
139	>	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
140	>	sg_set_error(SG_ERROR_SETMNTENT, NULL);
141	>	return NULL;
142		}
143
144	+	while((mp=getmntent(f))){
145	+	if((statfs(mp->mnt_dir, &fs)) !=0){
146	+	continue;
147	+	}
148
149	+	valid_type = is_valid_fs_type(mp->mnt_type);
150	+	#endif
151	+
152	+	#ifdef SOLARIS
153		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
154	+	sg_set_error(SG_ERROR_OPEN, "/etc/mnttab");
155		return NULL;
156		}
157		while((getmntent(f, &mp)) == 0){
158		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
159		continue;
160		}
161	+	valid_type = is_valid_fs_type(mp.mnt_fstype);
162	+	#endif
163
164	<	valid_type=0;
165	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
166	<	if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
99	<	valid_type=1;
100	<	break;
164	>	if(valid_type){
165	>	if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) {
166	>	return NULL;
167		}
168	<	}
168	>	disk_ptr=disk_stats+num_disks;
169
170	<	if(valid_type){
171	<	if(num_disks>watermark-1){
172	<	disk_ptr=disk_stats;
173	<	if((disk_stats=realloc(disk_stats, (watermark*2 * sizeof(disk_stat_t))))==NULL){
174	<	disk_stats=disk_ptr;
175	<	return NULL;
176	<	}
170	>	#ifdef ALLBSD
171	>	if (sg_update_string(&disk_ptr->device_name, mp->f_mntfromname) < 0) {
172	>	return NULL;
173	>	}
174	>	if (sg_update_string(&disk_ptr->fs_type, mp->f_fstypename) < 0) {
175	>	return NULL;
176	>	}
177	>	if (sg_update_string(&disk_ptr->mnt_point, mp->f_mntonname) < 0) {
178	>	return NULL;
179	>	}
180
181	<	watermark=watermark*2;
182	<	init_disk_stat(num_disks, watermark-1, disk_stats);
181	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
182	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
183	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
184	>
185	>	disk_ptr->total_inodes=(long long)mp->f_files;
186	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
187	>	/* Freebsd doesn't have a "available" inodes */
188	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
189	>	#endif
190	>	#if defined(LINUX) || defined(CYGWIN)
191	>	if (sg_update_string(&disk_ptr->device_name, mp->mnt_fsname) < 0) {
192	>	return NULL;
193		}
194	+
195	+	if (sg_update_string(&disk_ptr->fs_type, mp->mnt_type) < 0) {
196	+	return NULL;
197	+	}
198
199	<	disk_ptr=disk_stats+num_disks;
200	<
201	<	/* Memory leak in event of realloc failing */
199	>	if (sg_update_string(&disk_ptr->mnt_point, mp->mnt_dir) < 0) {
200	>	return NULL;
201	>	}
202	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
203	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
204	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
205	>
206	>	disk_ptr->total_inodes=(long long)fs.f_files;
207	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
208	>	/* Linux doesn't have a "available" inodes */
209	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
210	>	#endif
211	>
212	>	#ifdef SOLARIS
213		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
214	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
215	<	of a k each */
216	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
214	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
215	>	* be upwards of a k each
216	>	*/
217	>	if (sg_update_string(&disk_ptr->device_name, mp.mnt_special) < 0) {
218		return NULL;
219		}
220
221	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
222	<	return NULL;
223	<	}
221	>	if (sg_update_string(&disk_ptr->fs_type, mp.mnt_fstype) < 0) {
222	>	return NULL;
223	>	}
224
225	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
226	<	return NULL;
227	<	}
225	>	if (sg_update_string(&disk_ptr->mnt_point, mp.mnt_mountp) < 0) {
226	>	return NULL;
227	>	}
228
229		disk_ptr->size = (long long)fs.f_frsize * (long long)fs.f_blocks;
230		disk_ptr->avail = (long long)fs.f_frsize * (long long)fs.f_bavail;
#	Line 138 | Line 233 | disk_stat_t *get_disk_stats(int *entries){
233		disk_ptr->total_inodes=(long long)fs.f_files;
234		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
235		disk_ptr->free_inodes=(long long)fs.f_favail;
236	<
236	>	#endif
237		num_disks++;
238		}
239		}
240
241		*entries=num_disks;
242
243	<	/* If this fails, there is very little i can do about it, so i'll ignore it :) */
243	>	/* If this fails, there is very little i can do about it, so
244	>	I'll ignore it :) */
245	>	#if defined(LINUX) || defined(CYGWIN)
246	>	endmntent(f);
247	>	#endif
248	>	#if defined(SOLARIS)
249		fclose(f);
250	+	#endif
251
252		return disk_stats;
253
254		}
255
256	<	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
256	>	int sg_fs_compare_device_name(const void *va, const void *vb) {
257	>	const sg_fs_stats *a = (const sg_fs_stats *)va;
258	>	const sg_fs_stats *b = (const sg_fs_stats *)vb;
259
260	<	for(diskio_stats+=start; start<end; start++){
158	<	diskio_stats->disk_name=NULL;
159	<
160	<	diskio_stats++;
161	<	}
260	>	return strcmp(a->device_name, b->device_name);
261		}
262
263	<	diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
263	>	int sg_fs_compare_mnt_point(const void *va, const void *vb) {
264	>	const sg_fs_stats *a = (const sg_fs_stats *)va;
265	>	const sg_fs_stats *b = (const sg_fs_stats *)vb;
266
267	<	if(diskio_stats==NULL){
267	>	return strcmp(a->mnt_point, b->mnt_point);
268	>	}
269
270	<	if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
271	<	return NULL;
272	<	}
171	<	diskio_stat_init(0, needed_entries, diskio_stats);
172	<	*cur_entries=needed_entries;
270	>	static void diskio_stat_init(sg_disk_io_stats *d) {
271	>	d->disk_name = NULL;
272	>	}
273
274	<	return diskio_stats;
275	<	}
274	>	static void diskio_stat_destroy(sg_disk_io_stats *d) {
275	>	free(d->disk_name);
276	>	}
277
278	+	VECTOR_DECLARE_STATIC(diskio_stats, sg_disk_io_stats, 10,
279	+	diskio_stat_init, diskio_stat_destroy);
280
281	<	if(*cur_entries<needed_entries){
282	<	diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
283	<	if(diskio_stats==NULL){
284	<	return NULL;
285	<	}
286	<	diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
184	<	*cur_entries=needed_entries;
185	<	}
281	>	#ifdef LINUX
282	>	typedef struct {
283	>	int major;
284	>	int minor;
285	>	} partition;
286	>	#endif
287
288	<	return diskio_stats;
289	<	}
288	>	sg_disk_io_stats *sg_get_disk_io_stats(int *entries){
289	>	int num_diskio;
290	>	#ifndef LINUX
291	>	sg_disk_io_stats *diskio_stats_ptr;
292	>	#endif
293
294	<	static diskio_stat_t *diskio_stats=NULL;
295	<	static int num_diskio=0;
294	>	#ifdef SOLARIS
295	>	kstat_ctl_t *kc;
296	>	kstat_t *ksp;
297	>	kstat_io_t kios;
298	>	#endif
299	>	#ifdef LINUX
300	>	FILE *f;
301	>	char *line_ptr;
302	>	int major, minor;
303	>	int has_pp_stats = 1;
304	>	VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL);
305	>	int i, n;
306	>	time_t now;
307	>	const char *format;
308	>	#endif
309	>	#if defined(FREEBSD) || defined(DFBSD)
310	>	static struct statinfo stats;
311	>	static int stats_init = 0;
312	>	int counter;
313	>	struct device_selection *dev_sel = NULL;
314	>	int n_selected, n_selections;
315	>	long sel_gen;
316	>	struct devstat *dev_ptr;
317	>	#endif
318	>	#ifdef NETBSD
319	>	struct disk_sysctl *stats;
320	>	#endif
321	>	#ifdef OPENBSD
322	>	int diskcount;
323	>	char *disknames, *name, *bufpp;
324	>	char **dk_name;
325	>	struct diskstats *stats;
326	>	#endif
327	>	#ifdef NETBSD
328	>	#define MIBSIZE 3
329	>	#endif
330	>	#ifdef OPENBSD
331	>	#define MIBSIZE 2
332	>	#endif
333	>	#if defined(NETBSD) || defined(OPENBSD)
334	>	int num_disks, i;
335	>	int mib[MIBSIZE];
336	>	size_t size;
337	>	#endif
338
339	<	diskio_stat_t *get_diskio_stats(int *entries){
339	>	num_diskio=0;
340
341	<	static int sizeof_diskio_stats=0;
342	<	diskio_stat_t *diskio_stats_ptr;
341	>	#ifdef OPENBSD
342	>	mib[0] = CTL_HW;
343	>	mib[1] = HW_DISKCOUNT;
344
345	<	kstat_ctl_t *kc;
346	<	kstat_t *ksp;
347	<	kstat_io_t kios;
345	>	size = sizeof(diskcount);
346	>	if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) {
347	>	sg_set_error(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKCOUNT");
348	>	return NULL;
349	>	}
350
351	<	if ((kc = kstat_open()) == NULL) {
352	<	return NULL;
204	<	}
351	>	mib[0] = CTL_HW;
352	>	mib[1] = HW_DISKNAMES;
353
354	<	num_diskio=0;
354	>	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
355	>	sg_set_error(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKNAMES");
356	>	return NULL;
357	>	}
358
359	+	disknames = sg_malloc(size);
360	+	if (disknames == NULL) {
361	+	return NULL;
362	+	}
363	+
364	+	if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) {
365	+	sg_set_error(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKNAMES");
366	+	return NULL;
367	+	}
368	+
369	+	dk_name = sg_malloc(diskcount * sizeof(char *));
370	+	bufpp = disknames;
371	+	for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) {
372	+	dk_name[i] = name;
373	+	}
374	+	#endif
375	+
376	+	#if defined(NETBSD) || defined(OPENBSD)
377	+	mib[0] = CTL_HW;
378	+	mib[1] = HW_DISKSTATS;
379	+	#ifdef NETBSD
380	+	mib[2] = sizeof(struct disk_sysctl);
381	+	#endif
382	+
383	+	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
384	+	sg_set_error(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKSTATS");
385	+	return NULL;
386	+	}
387	+
388	+	#ifdef NETBSD
389	+	num_disks = size / sizeof(struct disk_sysctl);
390	+	#else
391	+	num_disks = size / sizeof(struct diskstats);
392	+	#endif
393	+
394	+	stats = sg_malloc(size);
395	+	if (stats == NULL) {
396	+	return NULL;
397	+	}
398	+
399	+	if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) {
400	+	sg_set_error(SG_ERROR_SYSCTL, "CTL_HW.HW_DISKSTATS");
401	+	return NULL;
402	+	}
403	+
404	+	for (i = 0; i < num_disks; i++) {
405	+	const char *name;
406	+	u_int64_t rbytes, wbytes;
407	+
408	+	#ifdef NETBSD
409	+	#ifdef HAVE_DK_RBYTES
410	+	rbytes = stats[i].dk_rbytes;
411	+	wbytes = stats[i].dk_wbytes;
412	+	#else
413	+	/* Before 2.0, NetBSD merged reads and writes. */
414	+	rbytes = wbytes = stats[i].dk_bytes;
415	+	#endif
416	+	#else
417	+	#ifdef HAVE_DS_RBYTES
418	+	rbytes = stats[i].ds_rbytes;
419	+	wbytes = stats[i].ds_wbytes;
420	+	#else
421	+	/* Before 3.5, OpenBSD merged reads and writes */
422	+	rbytes = wbytes = stats[i].ds_bytes;
423	+	#endif
424	+	#endif
425	+
426	+	/* Don't keep stats for disks that have never been used. */
427	+	if (rbytes == 0 && wbytes == 0) {
428	+	continue;
429	+	}
430	+
431	+	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
432	+	return NULL;
433	+	}
434	+	diskio_stats_ptr = diskio_stats + num_diskio;
435	+
436	+	diskio_stats_ptr->read_bytes = rbytes;
437	+	diskio_stats_ptr->write_bytes = wbytes;
438	+	#ifdef NETBSD
439	+	name = stats[i].dk_name;
440	+	#else
441	+	name = dk_name[i];
442	+	#endif
443	+	if (sg_update_string(&diskio_stats_ptr->disk_name, name) < 0) {
444	+	return NULL;
445	+	}
446	+	diskio_stats_ptr->systime = time(NULL);
447	+
448	+	num_diskio++;
449	+	}
450	+
451	+	free(stats);
452	+	#ifdef OPENBSD
453	+	free(dk_name);
454	+	free(disknames);
455	+	#endif
456	+	#endif
457	+
458	+	#if defined(FREEBSD) || defined(DFBSD)
459	+	if (!stats_init) {
460	+	stats.dinfo=sg_malloc(sizeof(struct devinfo));
461	+	if(stats.dinfo==NULL) return NULL;
462	+	bzero(stats.dinfo, sizeof(struct devinfo));
463	+	stats_init = 1;
464	+	}
465	+	#ifdef FREEBSD5
466	+	if ((devstat_getdevs(NULL, &stats)) < 0) {
467	+	sg_set_error(SG_ERROR_DEVSTAT_GETDEVS, NULL);
468	+	return NULL;
469	+	}
470	+	/* Not aware of a get all devices, so i said 999. If we ever
471	+	* find a machine with more than 999 disks, then i'll change
472	+	* this number :)
473	+	*/
474	+	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) {
475	+	sg_set_error(SG_ERROR_DEVSTAT_SELECTDEVS, NULL);
476	+	return NULL;
477	+	}
478	+	#else
479	+	if ((getdevs(&stats)) < 0) {
480	+	sg_set_error(SG_ERROR_DEVSTAT_GETDEVS, NULL);
481	+	return NULL;
482	+	}
483	+	/* Not aware of a get all devices, so i said 999. If we ever
484	+	* find a machine with more than 999 disks, then i'll change
485	+	* this number :)
486	+	*/
487	+	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) {
488	+	sg_set_error(SG_ERROR_DEVSTAT_SELECTDEVS, NULL);
489	+	return NULL;
490	+	}
491	+	#endif
492	+
493	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
494	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
495	+
496	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
497	+	* devices.. like mem, proc.. and also doesn't report floppy
498	+	* drives etc unless they are doing stuff :)
499	+	*/
500	+	#ifdef FREEBSD5
501	+	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
502	+	#else
503	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
504	+	#endif
505	+
506	+	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
507	+	return NULL;
508	+	}
509	+	diskio_stats_ptr=diskio_stats+num_diskio;
510	+
511	+	#ifdef FREEBSD5
512	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
513	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
514	+	#else
515	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
516	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
517	+	#endif
518	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
519	+	if (asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number) == -1) {
520	+	sg_set_error(SG_ERROR_ASPRINTF, NULL);
521	+	return NULL;
522	+	}
523	+	diskio_stats_ptr->systime=time(NULL);
524	+
525	+	num_diskio++;
526	+	}
527	+	free(dev_sel);
528	+
529	+	#endif
530	+	#ifdef SOLARIS
531	+	if ((kc = kstat_open()) == NULL) {
532	+	sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
533	+	return NULL;
534	+	}
535	+
536		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
537	<	if (!strcmp(ksp->ks_class, "disk")) {
537	>	if (!strcmp(ksp->ks_class, "disk")) {
538
539		if(ksp->ks_type != KSTAT_TYPE_IO) continue;
540		/* We dont want metadevices appearins as num_diskio */
541		if(strcmp(ksp->ks_module, "md")==0) continue;
542	<	if((kstat_read(kc, ksp, &kios))==-1){
542	>	if((kstat_read(kc, ksp, &kios))==-1){
543		}
544
545	<	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
545	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
546		kstat_close(kc);
547		return NULL;
548		}
549		diskio_stats_ptr=diskio_stats+num_diskio;
550
551		diskio_stats_ptr->read_bytes=kios.nread;
224	–
552		diskio_stats_ptr->write_bytes=kios.nwritten;
553	+	if (sg_update_string(&diskio_stats_ptr->disk_name,
554	+	sg_get_svr_from_bsd(ksp->ks_name)) < 0) {
555	+	return NULL;
556	+	}
557	+	diskio_stats_ptr->systime=time(NULL);
558
227	–	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
228	–
229	–	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
559		num_diskio++;
560		}
561		}
562
563		kstat_close(kc);
564	+	#endif
565
566	+	#ifdef LINUX
567	+	num_diskio = 0;
568	+	n = 0;
569	+
570	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
571	+	have statistics in here too, so we can use those directly.
572	+	2.6 kernels have /proc/diskstats instead with almost (but not quite)
573	+	the same format. */
574	+
575	+	f = fopen("/proc/diskstats", "r");
576	+	format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld";
577	+	if (f == NULL) {
578	+	f = fopen("/proc/partitions", "r");
579	+	format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld";
580	+	}
581	+	if (f == NULL) goto out;
582	+	now = time(NULL);
583	+
584	+	while ((line_ptr = sg_f_read_line(f, "")) != NULL) {
585	+	char name[100];
586	+	char *s;
587	+	long long rsect, wsect;
588	+
589	+	int nr = sscanf(line_ptr, format,
590	+	&major, &minor, name, &rsect, &wsect);
591	+	if (nr < 3) continue;
592	+
593	+	/* Skip device names ending in numbers, since they're
594	+	partitions. */
595	+	s = name;
596	+	while (*s != '\0') s++;
597	+	--s;
598	+	if (*s >= '0' && *s <= '9') continue;
599	+
600	+	if (nr < 5) {
601	+	has_pp_stats = 0;
602	+	rsect = 0;
603	+	wsect = 0;
604	+	}
605	+
606	+	if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) {
607	+	goto out;
608	+	}
609	+	if (VECTOR_RESIZE(parts, n + 1) < 0) {
610	+	goto out;
611	+	}
612	+
613	+	if (sg_update_string(&diskio_stats[n].disk_name, name) < 0) {
614	+	goto out;
615	+	}
616	+	diskio_stats[n].read_bytes = rsect * 512;
617	+	diskio_stats[n].write_bytes = wsect * 512;
618	+	diskio_stats[n].systime = now;
619	+	parts[n].major = major;
620	+	parts[n].minor = minor;
621	+
622	+	n++;
623	+	}
624	+
625	+	fclose(f);
626	+	f = NULL;
627	+
628	+	if (!has_pp_stats) {
629	+	/* This is an older kernel where /proc/partitions doesn't
630	+	contain stats. Read what we can from /proc/stat instead, and
631	+	fill in the appropriate bits of the list allocated above. */
632	+
633	+	f = fopen("/proc/stat", "r");
634	+	if (f == NULL) goto out;
635	+	now = time(NULL);
636	+
637	+	line_ptr = sg_f_read_line(f, "disk_io:");
638	+	if (line_ptr == NULL) goto out;
639	+
640	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
641	+	long long rsect, wsect;
642	+
643	+	if (*++line_ptr == '\0') break;
644	+
645	+	if((sscanf(line_ptr,
646	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
647	+	&major, &minor, &rsect, &wsect)) != 4) {
648	+	continue;
649	+	}
650	+
651	+	/* Find the corresponding device from earlier.
652	+	Just to add to the fun, "minor" is actually the disk
653	+	number, not the device minor, so we need to figure
654	+	out the real minor number based on the major!
655	+	This list is not exhaustive; if you're running
656	+	an older kernel you probably don't have fancy
657	+	I2O hardware anyway... */
658	+	switch (major) {
659	+	case 3:
660	+	case 21:
661	+	case 22:
662	+	case 33:
663	+	case 34:
664	+	case 36:
665	+	case 56:
666	+	case 57:
667	+	case 88:
668	+	case 89:
669	+	case 90:
670	+	case 91:
671	+	minor *= 64;
672	+	break;
673	+	case 9:
674	+	case 43:
675	+	break;
676	+	default:
677	+	minor *= 16;
678	+	break;
679	+	}
680	+	for (i = 0; i < n; i++) {
681	+	if (major == parts[i].major
682	+	&& minor == parts[i].minor)
683	+	break;
684	+	}
685	+	if (i == n) continue;
686	+
687	+	/* We read the number of blocks. Blocks are stored in
688	+	512 bytes */
689	+	diskio_stats[i].read_bytes = rsect * 512;
690	+	diskio_stats[i].write_bytes = wsect * 512;
691	+	diskio_stats[i].systime = now;
692	+	}
693	+	}
694	+
695	+	num_diskio = n;
696	+	out:
697	+	if (f != NULL) fclose(f);
698	+	#endif
699	+
700	+	#ifdef CYGWIN
701	+	sg_set_error(SG_ERROR_UNSUPPORTED, "Cygwin");
702	+	return NULL;
703	+	#endif
704	+
705		*entries=num_diskio;
706
707		return diskio_stats;
708		}
709
710	<	diskio_stat_t *get_diskio_stats_diff(int *entries){
711	<	static diskio_stat_t *diskio_stats_diff=NULL;
712	<	static int sizeof_diskio_stats_diff=0;
713	<	diskio_stat_t *diskio_stats_diff_ptr, *diskio_stats_ptr;
714	<	int disks, x, y;
710	>	sg_disk_io_stats *sg_get_disk_io_stats_diff(int *entries){
711	>	VECTOR_DECLARE_STATIC(diff, sg_disk_io_stats, 1,
712	>	diskio_stat_init, diskio_stat_destroy);
713	>	sg_disk_io_stats *src = NULL, *dest;
714	>	int i, j, diff_count, new_count;
715
716	<	if(diskio_stats==NULL){
717	<	diskio_stats_ptr=get_diskio_stats(&disks);
718	<	*entries=disks;
250	<	return diskio_stats_ptr;
716	>	if (diskio_stats == NULL) {
717	>	/* No previous stats, so we can't calculate a difference. */
718	>	return sg_get_disk_io_stats(entries);
719		}
720
721	<	diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
722	<	if(diskio_stats_diff==NULL){
721	>	/* Resize the results array to match the previous stats. */
722	>	diff_count = VECTOR_SIZE(diskio_stats);
723	>	if (VECTOR_RESIZE(diff, diff_count) < 0) {
724		return NULL;
725		}
726
727	<	diskio_stats_diff_ptr=diskio_stats_diff;
728	<	diskio_stats_ptr=diskio_stats;
727	>	/* Copy the previous stats into the result. */
728	>	for (i = 0; i < diff_count; i++) {
729	>	src = &diskio_stats[i];
730	>	dest = &diff[i];
731
732	<	for(disks=0;disks<num_diskio;disks++){
733	<	if(diskio_stats_diff_ptr->disk_name!=NULL){
263	<	free(diskio_stats_diff_ptr->disk_name);
732	>	if (sg_update_string(&dest->disk_name, src->disk_name) < 0) {
733	>	return NULL;
734		}
735	<	diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
736	<	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
737	<	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
738	<	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;
735	>	dest->read_bytes = src->read_bytes;
736	>	dest->write_bytes = src->write_bytes;
737	>	dest->systime = src->systime;
738	>	}
739
740	<	diskio_stats_diff_ptr++;
741	<	diskio_stats_ptr++;
740	>	/* Get a new set of stats. */
741	>	if (sg_get_disk_io_stats(&new_count) == NULL) {
742	>	return NULL;
743		}
744
745	<	diskio_stats_ptr=get_diskio_stats(&disks);
746	<	diskio_stats_diff_ptr=diskio_stats_diff;
745	>	/* For each previous stat... */
746	>	for (i = 0; i < diff_count; i++) {
747	>	dest = &diff[i];
748
749	<	for(x=0;x<sizeof_diskio_stats_diff;x++){
750	<
751	<	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
752	<	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
753	<	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
754	<	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
755	<	}else{
284	<	diskio_stats_ptr=diskio_stats;
285	<	for(y=0;y<disks;y++){
286	<	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
287	<	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
288	<	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
289	<	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
290	<
291	<	break;
292	<	}
293	<
294	<	diskio_stats_ptr++;
749	>	/* ... find the corresponding new stat ... */
750	>	for (j = 0; j < new_count; j++) {
751	>	/* Try the new stat in the same position first,
752	>	since that's most likely to be it. */
753	>	src = &diskio_stats[(i + j) % new_count];
754	>	if (strcmp(src->disk_name, dest->disk_name) == 0) {
755	>	break;
756		}
757		}
758	+	if (j == new_count) {
759	+	/* No match found. */
760	+	continue;
761	+	}
762
763	<	diskio_stats_ptr++;
764	<	diskio_stats_diff_ptr++;
765	<
763	>	/* ... and subtract the previous stat from it to get the
764	>	difference. */
765	>	dest->read_bytes = src->read_bytes - dest->read_bytes;
766	>	dest->write_bytes = src->write_bytes - dest->write_bytes;
767	>	dest->systime = src->systime - dest->systime;
768		}
769	<
770	<	*entries=sizeof_diskio_stats_diff;
771	<	return diskio_stats_diff;
769	>
770	>	*entries = diff_count;
771	>	return diff;
772		}
773	+
774	+	int sg_disk_io_compare_name(const void *va, const void *vb) {
775	+	const sg_disk_io_stats *a = (const sg_disk_io_stats *)va;
776	+	const sg_disk_io_stats *b = (const sg_disk_io_stats *)vb;
777	+
778	+	return strcmp(a->disk_name, b->disk_name);
779	+	}
780	+

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