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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 1.2 by pajs, Thu Feb 20 13:08:45 2003 UTC vs.
Revision 1.59 by ats, Sun Apr 4 23:55:48 2004 UTC

#	Line 1 | Line 1
1	<	/*
1	>	/*
2		* i-scream central monitoring system
3	<	* http://www.i-scream.org.uk
4	<	* Copyright (C) 2000-2002 i-scream
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2004 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
35		#ifdef SOLARIS
36		#include <sys/mnttab.h>
33	–	#include <sys/types.h>
37		#include <sys/statvfs.h>
38	<
38	>	#include <kstat.h>
39		#define VALID_FS_TYPES {"ufs", "tmpfs"}
40	+	#endif
41
42	+	#if defined(LINUX) || defined(CYGWIN)
43	+	#include <mntent.h>
44	+	#include <sys/vfs.h>
45	+	#include "tools.h"
46		#endif
47
48	<	#define START_VAL 1
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	<	char *copy_string(char *orig_ptr, const char *newtext){
56	>	#ifdef CYGWIN
57	>	#define VALID_FS_TYPES {"user"}
58	>	#endif
59
60	<	/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
61	<	orig_ptr=realloc(orig_ptr, (1+strlen(newtext)));
62	<	if(orig_ptr==NULL){
63	<	return NULL;
64	<	}
65	<	strcpy(orig_ptr, 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	<	return orig_ptr;
79	>	static void disk_stat_init(disk_stat_t *d) {
80	>	d->device_name = NULL;
81	>	d->fs_type = NULL;
82	>	d->mnt_point = NULL;
83		}
84
85	+	static void disk_stat_destroy(disk_stat_t *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	>	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;
61	<
62	<	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	<
100	>	return 0;
101		}
102
103		disk_stat_t *get_disk_stats(int *entries){
104	+	VECTOR_DECLARE_STATIC(disk_stats, disk_stat_t, 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;
73	<	int x, valid_type;
113	>	disk_stat_t *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	>	return NULL;
132	>	}
133	>	for(;nummnt--; mp++){
134	>	valid_type = is_valid_fs_type(mp->f_fstypename);
135	>	#endif
136
137	<	if(watermark==-1){
138	<	disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
139	<	if(disk_stats==NULL){
85	<	return NULL;
86	<	}
87	<	watermark=START_VAL;
88	<	init_disk_stat(0, watermark-1, disk_stats);
137	>	#if defined(LINUX) || defined(CYGWIN)
138	>	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
139	>	return NULL;
140		}
141
142	+	while((mp=getmntent(f))){
143	+	if((statfs(mp->mnt_dir, &fs)) !=0){
144	+	continue;
145	+	}
146
147	+	valid_type = is_valid_fs_type(mp->mnt_type);
148	+	#endif
149	+
150	+	#ifdef SOLARIS
151		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
152		return NULL;
153		}
#	Line 96 | Line 155 | disk_stat_t *get_disk_stats(int *entries){
155		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
156		continue;
157		}
158	+	valid_type = is_valid_fs_type(mp.mnt_fstype);
159	+	#endif
160
161	<	valid_type=0;
162	<	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
163	<	if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
103	<	valid_type=1;
104	<	break;
161	>	if(valid_type){
162	>	if (VECTOR_RESIZE(disk_stats, num_disks + 1) < 0) {
163	>	return NULL;
164		}
165	<	}
165	>	disk_ptr=disk_stats+num_disks;
166
167	<	if(valid_type){
168	<	if(num_disks>watermark-1){
169	<	disk_ptr=disk_stats;
170	<	if((disk_stats=realloc(disk_stats, (watermark*2 * sizeof(disk_stat_t))))==NULL){
171	<	disk_stats=disk_ptr;
172	<	return NULL;
173	<	}
167	>	#ifdef ALLBSD
168	>	if (update_string(&disk_ptr->device_name, mp->f_mntfromname) == NULL) {
169	>	return NULL;
170	>	}
171	>	if (update_string(&disk_ptr->fs_type, mp->f_fstypename) == NULL) {
172	>	return NULL;
173	>	}
174	>	if (update_string(&disk_ptr->mnt_point, mp->f_mntonname) == NULL) {
175	>	return NULL;
176	>	}
177
178	<	watermark=watermark*2;
179	<	init_disk_stat(num_disks, watermark-1, disk_stats);
178	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
179	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
180	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
181	>
182	>	disk_ptr->total_inodes=(long long)mp->f_files;
183	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
184	>	/* Freebsd doesn't have a "available" inodes */
185	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
186	>	#endif
187	>	#if defined(LINUX) || defined(CYGWIN)
188	>	if (update_string(&disk_ptr->device_name, mp->mnt_fsname) == NULL) {
189	>	return NULL;
190		}
191	+
192	+	if (update_string(&disk_ptr->fs_type, mp->mnt_type) == NULL) {
193	+	return NULL;
194	+	}
195
196	<	disk_ptr=disk_stats+num_disks;
197	<
198	<	/* Memory leak in event of realloc failing */
196	>	if (update_string(&disk_ptr->mnt_point, mp->mnt_dir) == NULL) {
197	>	return NULL;
198	>	}
199	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
200	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
201	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
202	>
203	>	disk_ptr->total_inodes=(long long)fs.f_files;
204	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
205	>	/* Linux doesn't have a "available" inodes */
206	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
207	>	#endif
208	>
209	>	#ifdef SOLARIS
210		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
211	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
212	<	of a k each */
213	<	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
211	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
212	>	* be upwards of a k each
213	>	*/
214	>	if (update_string(&disk_ptr->device_name, mp.mnt_special) == NULL) {
215		return NULL;
216		}
217
218	<	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp.mnt_fstype))==NULL){
218	>	if (update_string(&disk_ptr->fs_type, mp.mnt_fstype) == NULL) {
219		return NULL;
220		}
221
222	<	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp.mnt_mountp))==NULL){
222	>	if (update_string(&disk_ptr->mnt_point, mp.mnt_mountp) == NULL) {
223		return NULL;
224		}
225
#	Line 142 | Line 230 | disk_stat_t *get_disk_stats(int *entries){
230		disk_ptr->total_inodes=(long long)fs.f_files;
231		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
232		disk_ptr->free_inodes=(long long)fs.f_favail;
233	<
233	>	#endif
234		num_disks++;
235		}
236		}
237
238		*entries=num_disks;
239
240	<	/* If this fails, there is very little i can do about it, so i'll ignore it :) */
240	>	/* If this fails, there is very little i can do about it, so
241	>	I'll ignore it :) */
242	>	#if defined(LINUX) || defined(CYGWIN)
243	>	endmntent(f);
244	>	#endif
245	>	#if defined(SOLARIS)
246		fclose(f);
247	+	#endif
248
249		return disk_stats;
250
251		}
252
253	<	diskio_stat_t get_diskio_stats(int *entries){
253	>	static void diskio_stat_init(diskio_stat_t *d) {
254	>	d->disk_name = NULL;
255	>	}
256
257	<	/* Do jibble */
257	>	static void diskio_stat_destroy(diskio_stat_t *d) {
258	>	free(d->disk_name);
259	>	}
260	>
261	>	VECTOR_DECLARE_STATIC(diskio_stats, diskio_stat_t, 10,
262	>	diskio_stat_init, diskio_stat_destroy);
263	>
264	>	#ifdef LINUX
265	>	typedef struct {
266	>	int major;
267	>	int minor;
268	>	} partition;
269	>	#endif
270	>
271	>	diskio_stat_t *get_diskio_stats(int *entries){
272	>	int num_diskio;
273	>	#ifndef LINUX
274	>	diskio_stat_t *diskio_stats_ptr;
275	>	#endif
276	>
277	>	#ifdef SOLARIS
278	>	kstat_ctl_t *kc;
279	>	kstat_t *ksp;
280	>	kstat_io_t kios;
281	>	#endif
282	>	#ifdef LINUX
283	>	FILE *f;
284	>	char *line_ptr;
285	>	int major, minor;
286	>	int has_pp_stats = 1;
287	>	VECTOR_DECLARE_STATIC(parts, partition, 16, NULL, NULL);
288	>	int i, n;
289	>	time_t now;
290	>	const char *format;
291	>	#endif
292	>	#if defined(FREEBSD) || defined(DFBSD)
293	>	static struct statinfo stats;
294	>	static int stats_init = 0;
295	>	int counter;
296	>	struct device_selection *dev_sel = NULL;
297	>	int n_selected, n_selections;
298	>	long sel_gen;
299	>	struct devstat *dev_ptr;
300	>	#endif
301	>	#ifdef NETBSD
302	>	struct disk_sysctl *stats;
303	>	#endif
304	>	#ifdef OPENBSD
305	>	int diskcount;
306	>	char *disknames, *name, *bufpp;
307	>	char **dk_name;
308	>	struct diskstats *stats;
309	>	#endif
310	>	#ifdef NETBSD
311	>	#define MIBSIZE 3
312	>	#endif
313	>	#ifdef OPENBSD
314	>	#define MIBSIZE 2
315	>	#endif
316	>	#if defined(NETBSD) || defined(OPENBSD)
317	>	int num_disks, i;
318	>	int mib[MIBSIZE];
319	>	size_t size;
320	>	#endif
321	>
322	>	num_diskio=0;
323	>
324	>	#ifdef OPENBSD
325	>	mib[0] = CTL_HW;
326	>	mib[1] = HW_DISKCOUNT;
327	>
328	>	size = sizeof(diskcount);
329	>	if (sysctl(mib, MIBSIZE, &diskcount, &size, NULL, 0) < 0) {
330	>	return NULL;
331	>	}
332	>
333	>	mib[0] = CTL_HW;
334	>	mib[1] = HW_DISKNAMES;
335	>
336	>	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
337	>	return NULL;
338	>	}
339	>
340	>	disknames = malloc(size);
341	>	if (disknames == NULL) {
342	>	return NULL;
343	>	}
344	>
345	>	if (sysctl(mib, MIBSIZE, disknames, &size, NULL, 0) < 0) {
346	>	return NULL;
347	>	}
348	>
349	>	dk_name = calloc(diskcount, sizeof(char *));
350	>	bufpp = disknames;
351	>	for (i = 0; i < diskcount && (name = strsep(&bufpp, ",")) != NULL; i++) {
352	>	dk_name[i] = name;
353	>	}
354	>	#endif
355	>
356	>	#if defined(NETBSD) || defined(OPENBSD)
357	>	mib[0] = CTL_HW;
358	>	mib[1] = HW_DISKSTATS;
359	>	#ifdef NETBSD
360	>	mib[2] = sizeof(struct disk_sysctl);
361	>	#endif
362	>
363	>	if (sysctl(mib, MIBSIZE, NULL, &size, NULL, 0) < 0) {
364	>	return NULL;
365	>	}
366	>
367	>	#ifdef NETBSD
368	>	num_disks = size / sizeof(struct disk_sysctl);
369	>	#else
370	>	num_disks = size / sizeof(struct diskstats);
371	>	#endif
372	>
373	>	stats = malloc(size);
374	>	if (stats == NULL) {
375	>	return NULL;
376	>	}
377	>
378	>	if (sysctl(mib, MIBSIZE, stats, &size, NULL, 0) < 0) {
379	>	return NULL;
380	>	}
381	>
382	>	for (i = 0; i < num_disks; i++) {
383	>	u_int64_t rbytes, wbytes;
384	>
385	>	#ifdef NETBSD
386	>	#ifdef HAVE_DK_RBYTES
387	>	rbytes = stats[i].dk_rbytes;
388	>	wbytes = stats[i].dk_wbytes;
389	>	#else
390	>	/* Before 1.7, NetBSD merged reads and writes. */
391	>	rbytes = wbytes = stats[i].dk_bytes;
392	>	#endif
393	>	#else
394	>	rbytes = wbytes = stats[i].ds_bytes;
395	>	#endif
396	>
397	>	/* Don't keep stats for disks that have never been used. */
398	>	if (rbytes == 0 && wbytes == 0) {
399	>	continue;
400	>	}
401	>
402	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
403	>	return NULL;
404	>	}
405	>	diskio_stats_ptr = diskio_stats + num_diskio;
406	>
407	>	diskio_stats_ptr->read_bytes = rbytes;
408	>	diskio_stats_ptr->write_bytes = wbytes;
409	>	if (diskio_stats_ptr->disk_name != NULL) {
410	>	free(diskio_stats_ptr->disk_name);
411	>	}
412	>	#ifdef NETBSD
413	>	diskio_stats_ptr->disk_name = strdup(stats[i].dk_name);
414	>	#else
415	>	diskio_stats_ptr->disk_name = strdup(dk_name[i]);
416	>	#endif
417	>	diskio_stats_ptr->systime = time(NULL);
418	>
419	>	num_diskio++;
420	>	}
421	>
422	>	free(stats);
423	>	#ifdef OPENBSD
424	>	free(dk_name);
425	>	free(disknames);
426	>	#endif
427	>	#endif
428	>
429	>	#if defined(FREEBSD) || defined(DFBSD)
430	>	if (!stats_init) {
431	>	stats.dinfo=malloc(sizeof(struct devinfo));
432	>	if(stats.dinfo==NULL) return NULL;
433	>	bzero(stats.dinfo, sizeof(struct devinfo));
434	>	stats_init = 1;
435	>	}
436	>	#ifdef FREEBSD5
437	>	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
438	>	/* Not aware of a get all devices, so i said 999. If we ever
439	>	* find a machine with more than 999 disks, then i'll change
440	>	* this number :)
441	>	*/
442	>	if (devstat_selectdevs(&dev_sel, &n_selected, &n_selections, &sel_gen, stats.dinfo->generation, stats.dinfo->devices, stats.dinfo->numdevs, NULL, 0, NULL, 0, DS_SELECT_ONLY, 999, 1) < 0) return NULL;
443	>	#else
444	>	if ((getdevs(&stats)) < 0) return NULL;
445	>	/* Not aware of a get all devices, so i said 999. If we ever
446	>	* find a machine with more than 999 disks, then i'll change
447	>	* this number :)
448	>	*/
449	>	if (selectdevs(&dev_sel, &n_selected, &n_selections, &sel_gen, stats.dinfo->generation, stats.dinfo->devices, stats.dinfo->numdevs, NULL, 0, NULL, 0, DS_SELECT_ONLY, 999, 1) < 0) return NULL;
450	>	#endif
451	>
452	>	for(counter=0;counter<stats.dinfo->numdevs;counter++){
453	>	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
454	>
455	>	/* Throw away devices that have done nothing, ever.. Eg "odd"
456	>	* devices.. like mem, proc.. and also doesn't report floppy
457	>	* drives etc unless they are doing stuff :)
458	>	*/
459	>	#ifdef FREEBSD5
460	>	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
461	>	#else
462	>	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
463	>	#endif
464	>
465	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
466	>	return NULL;
467	>	}
468	>	diskio_stats_ptr=diskio_stats+num_diskio;
469	>
470	>	#ifdef FREEBSD5
471	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
472	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
473	>	#else
474	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
475	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
476	>	#endif
477	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
478	>	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
479	>	diskio_stats_ptr->systime=time(NULL);
480	>
481	>	num_diskio++;
482	>	}
483	>	free(dev_sel);
484	>
485	>	#endif
486	>	#ifdef SOLARIS
487	>	if ((kc = kstat_open()) == NULL) {
488	>	return NULL;
489	>	}
490	>
491	>	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
492	>	if (!strcmp(ksp->ks_class, "disk")) {
493	>
494	>	if(ksp->ks_type != KSTAT_TYPE_IO) continue;
495	>	/* We dont want metadevices appearins as num_diskio */
496	>	if(strcmp(ksp->ks_module, "md")==0) continue;
497	>	if((kstat_read(kc, ksp, &kios))==-1){
498	>	}
499	>
500	>	if (VECTOR_RESIZE(diskio_stats, num_diskio + 1) < 0) {
501	>	kstat_close(kc);
502	>	return NULL;
503	>	}
504	>	diskio_stats_ptr=diskio_stats+num_diskio;
505	>
506	>	diskio_stats_ptr->read_bytes=kios.nread;
507	>
508	>	diskio_stats_ptr->write_bytes=kios.nwritten;
509	>
510	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
511	>
512	>	diskio_stats_ptr->disk_name=strdup((char *) get_svr_from_bsd(ksp->ks_name));
513	>	diskio_stats_ptr->systime=time(NULL);
514	>	num_diskio++;
515	>	}
516	>	}
517	>
518	>	kstat_close(kc);
519	>	#endif
520	>
521	>	#ifdef LINUX
522	>	num_diskio = 0;
523	>	n = 0;
524	>
525	>	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
526	>	have statistics in here too, so we can use those directly.
527	>	2.6 kernels have /proc/diskstats instead with almost (but not quite)
528	>	the same format. */
529	>
530	>	f = fopen("/proc/diskstats", "r");
531	>	format = " %d %d %99s %*d %*d %lld %*d %*d %*d %lld";
532	>	if (f == NULL) {
533	>	f = fopen("/proc/partitions", "r");
534	>	format = " %d %d %*d %99s %*d %*d %lld %*d %*d %*d %lld";
535	>	}
536	>	if (f == NULL) goto out;
537	>	now = time(NULL);
538	>
539	>	while ((line_ptr = f_read_line(f, "")) != NULL) {
540	>	char name[100];
541	>	char *s;
542	>	long long rsect, wsect;
543	>
544	>	int nr = sscanf(line_ptr, format,
545	>	&major, &minor, name, &rsect, &wsect);
546	>	if (nr < 3) continue;
547	>
548	>	/* Skip device names ending in numbers, since they're
549	>	partitions. */
550	>	s = name;
551	>	while (*s != '\0') s++;
552	>	--s;
553	>	if (*s >= '0' && *s <= '9') continue;
554	>
555	>	if (nr < 5) {
556	>	has_pp_stats = 0;
557	>	rsect = 0;
558	>	wsect = 0;
559	>	}
560	>
561	>	if (VECTOR_RESIZE(diskio_stats, n + 1) < 0) {
562	>	goto out;
563	>	}
564	>	if (VECTOR_RESIZE(parts, n + 1) < 0) {
565	>	goto out;
566	>	}
567	>
568	>	if (diskio_stats[n].disk_name != NULL)
569	>	free(diskio_stats[n].disk_name);
570	>	diskio_stats[n].disk_name = strdup(name);
571	>	diskio_stats[n].read_bytes = rsect * 512;
572	>	diskio_stats[n].write_bytes = wsect * 512;
573	>	diskio_stats[n].systime = now;
574	>	parts[n].major = major;
575	>	parts[n].minor = minor;
576	>
577	>	n++;
578	>	}
579	>
580	>	fclose(f);
581	>	f = NULL;
582	>
583	>	if (!has_pp_stats) {
584	>	/* This is an older kernel where /proc/partitions doesn't
585	>	contain stats. Read what we can from /proc/stat instead, and
586	>	fill in the appropriate bits of the list allocated above. */
587	>
588	>	f = fopen("/proc/stat", "r");
589	>	if (f == NULL) goto out;
590	>	now = time(NULL);
591	>
592	>	line_ptr = f_read_line(f, "disk_io:");
593	>	if (line_ptr == NULL) goto out;
594	>
595	>	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
596	>	long long rsect, wsect;
597	>
598	>	if (*++line_ptr == '\0') break;
599	>
600	>	if((sscanf(line_ptr,
601	>	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
602	>	&major, &minor, &rsect, &wsect)) != 4) {
603	>	continue;
604	>	}
605	>
606	>	/* Find the corresponding device from earlier.
607	>	Just to add to the fun, "minor" is actually the disk
608	>	number, not the device minor, so we need to figure
609	>	out the real minor number based on the major!
610	>	This list is not exhaustive; if you're running
611	>	an older kernel you probably don't have fancy
612	>	I2O hardware anyway... */
613	>	switch (major) {
614	>	case 3:
615	>	case 21:
616	>	case 22:
617	>	case 33:
618	>	case 34:
619	>	case 36:
620	>	case 56:
621	>	case 57:
622	>	case 88:
623	>	case 89:
624	>	case 90:
625	>	case 91:
626	>	minor *= 64;
627	>	break;
628	>	case 9:
629	>	case 43:
630	>	break;
631	>	default:
632	>	minor *= 16;
633	>	break;
634	>	}
635	>	for (i = 0; i < n; i++) {
636	>	if (major == parts[i].major
637	>	&& minor == parts[i].minor)
638	>	break;
639	>	}
640	>	if (i == n) continue;
641	>
642	>	/* We read the number of blocks. Blocks are stored in
643	>	512 bytes */
644	>	diskio_stats[i].read_bytes = rsect * 512;
645	>	diskio_stats[i].write_bytes = wsect * 512;
646	>	diskio_stats[i].systime = now;
647	>	}
648	>	}
649	>
650	>	num_diskio = n;
651	>	out:
652	>	if (f != NULL) fclose(f);
653	>	#endif
654	>
655	>	#ifdef CYGWIN
656		return NULL;
657	+	#endif
658	+
659	+	*entries=num_diskio;
660	+
661	+	return diskio_stats;
662		}
663	+
664	+	diskio_stat_t *get_diskio_stats_diff(int *entries){
665	+	VECTOR_DECLARE_STATIC(diff, diskio_stat_t, 1,
666	+	diskio_stat_init, diskio_stat_destroy);
667	+	diskio_stat_t *src = NULL, *dest;
668	+	int i, j, diff_count, new_count;
669	+
670	+	if (diskio_stats == NULL) {
671	+	/* No previous stats, so we can't calculate a difference. */
672	+	return get_diskio_stats(entries);
673	+	}
674	+
675	+	/* Resize the results array to match the previous stats. */
676	+	diff_count = VECTOR_SIZE(diskio_stats);
677	+	if (VECTOR_RESIZE(diff, diff_count) < 0) {
678	+	return NULL;
679	+	}
680	+
681	+	/* Copy the previous stats into the result. */
682	+	for (i = 0; i < diff_count; i++) {
683	+	src = &diskio_stats[i];
684	+	dest = &diff[i];
685	+
686	+	if (dest->disk_name != NULL) {
687	+	free(dest->disk_name);
688	+	}
689	+	dest->disk_name = strdup(src->disk_name);
690	+	dest->read_bytes = src->read_bytes;
691	+	dest->write_bytes = src->write_bytes;
692	+	dest->systime = src->systime;
693	+	}
694	+
695	+	/* Get a new set of stats. */
696	+	if (get_diskio_stats(&new_count) == NULL) {
697	+	return NULL;
698	+	}
699	+
700	+	/* For each previous stat... */
701	+	for (i = 0; i < diff_count; i++) {
702	+	dest = &diff[i];
703	+
704	+	/* ... find the corresponding new stat ... */
705	+	for (j = 0; j < new_count; j++) {
706	+	/* Try the new stat in the same position first,
707	+	since that's most likely to be it. */
708	+	src = &diskio_stats[(i + j) % new_count];
709	+	if (strcmp(src->disk_name, dest->disk_name) == 0) {
710	+	break;
711	+	}
712	+	}
713	+	if (j == new_count) {
714	+	/* No match found. */
715	+	continue;
716	+	}
717	+
718	+	/* ... and subtract the previous stat from it to get the
719	+	difference. */
720	+	dest->read_bytes = src->read_bytes - dest->read_bytes;
721	+	dest->write_bytes = src->write_bytes - dest->write_bytes;
722	+	dest->systime = src->systime - dest->systime;
723	+	}
724	+
725	+	*entries = diff_count;
726	+	return diff;
727	+	}
728	+

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