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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 1.7 by tdb, Fri Feb 28 22:59:35 2003 UTC vs.
Revision 1.43 by tdb, Thu Nov 20 12:13:12 2003 UTC

#	Line 1 | Line 1
1		/*
2		* i-scream central monitoring system
3	<	* http://www.i-scream.org.uk
4	<	* Copyright (C) 2000-2002 i-scream
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2003 i-scream
5		*
6		* This program is free software; you can redistribute it and/or
7		* modify it under the terms of the GNU General Public License
#	Line 22 | Line 22
22		#include "config.h"
23		#endif
24
25	–	#include <stdlib.h>
25		#include <stdio.h>
26	+	#include <stdlib.h>
27		#include <string.h>
28	+	#include <time.h>
29		#include "statgrab.h"
30
31		#ifdef SOLARIS
#	Line 34 | Line 35
35		#define VALID_FS_TYPES {"ufs", "tmpfs"}
36		#endif
37
38	+	#if defined(LINUX) || defined(CYGWIN)
39	+	#include <mntent.h>
40	+	#include <sys/vfs.h>
41	+	#include "tools.h"
42	+	#endif
43	+
44	+	#ifdef LINUX
45	+	#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \
46	+	"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \
47	+	"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \
48	+	"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \
49	+	"umsdos", "vfat", "xfs", "jfs"}
50	+	#endif
51	+
52	+	#ifdef CYGWIN
53	+	#define VALID_FS_TYPES {"user"}
54	+	#endif
55	+
56	+	#ifdef ALLBSD
57	+	#include <sys/param.h>
58	+	#include <sys/ucred.h>
59	+	#include <sys/mount.h>
60	+	#endif
61	+	#ifdef FREEBSD
62	+	#include <sys/dkstat.h>
63	+	#include <devstat.h>
64	+	#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \
65	+	"ufs", "mfs"}
66	+	#endif
67	+	#ifdef NETBSD
68	+	#include <sys/param.h>
69	+	#include <sys/sysctl.h>
70	+	#include <sys/disk.h>
71	+	#define VALID_FS_TYPES {"ffs", "mfs", "msdos", "lfs", "adosfs", "ext2fs", \
72	+	"ntfs"}
73	+	#endif
74	+
75		#define START_VAL 1
76
77		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 60 | Line 98 | void init_disk_stat(int start, int end, disk_stat_t *d
98		}
99		}
100
101	+	int is_valid_fs_type(const char *type) {
102	+	const char *types[] = VALID_FS_TYPES;
103	+	int i;
104	+
105	+	for (i = 0; i < (sizeof types / sizeof *types); i++) {
106	+	if (strcmp(types[i], type) == 0) {
107	+	return 1;
108	+	}
109	+	}
110	+	return 0;
111	+	}
112	+
113		disk_stat_t *get_disk_stats(int *entries){
114
115		static disk_stat_t *disk_stats;
116		static int watermark=-1;
117
118	<	char *fs_types[] = VALID_FS_TYPES;
69	<	int x, valid_type;
70	<
118	>	int valid_type;
119		int num_disks=0;
120	<	struct mnttab mp;
73	<	struct statvfs fs;
120	>	#if defined(LINUX) || defined (SOLARIS) || defined(CYGWIN)
121		FILE *f;
122	+	#endif
123
124		disk_stat_t *disk_ptr;
125
126	+	#ifdef SOLARIS
127	+	struct mnttab mp;
128	+	struct statvfs fs;
129	+	#endif
130	+	#if defined(LINUX) || defined(CYGWIN)
131	+	struct mntent *mp;
132	+	struct statfs fs;
133	+	#endif
134	+	#ifdef ALLBSD
135	+	int nummnt;
136	+	struct statfs *mp;
137	+	#endif
138	+
139		if(watermark==-1){
140		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
141		if(disk_stats==NULL){
#	Line 83 | Line 144 | disk_stat_t *get_disk_stats(int *entries){
144		watermark=START_VAL;
145		init_disk_stat(0, watermark-1, disk_stats);
146		}
147	+	#ifdef ALLBSD
148	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
149	+	if (nummnt<=0){
150	+	return NULL;
151	+	}
152	+	for(;nummnt--; mp++){
153	+	valid_type = is_valid_fs_type(mp->f_fstypename);
154	+	#endif
155
156	+	#if defined(LINUX) || defined(CYGWIN)
157	+	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
158	+	return NULL;
159	+	}
160
161	+	while((mp=getmntent(f))){
162	+	if((statfs(mp->mnt_dir, &fs)) !=0){
163	+	continue;
164	+	}
165	+
166	+	valid_type = is_valid_fs_type(mp->mnt_type);
167	+	#endif
168	+
169	+	#ifdef SOLARIS
170		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
171		return NULL;
172		}
#	Line 92 | Line 174 | disk_stat_t *get_disk_stats(int *entries){
174		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
175		continue;
176		}
177	+	valid_type = is_valid_fs_type(mp.mnt_fstype);
178	+	#endif
179
96	–	valid_type=0;
97	–	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
98	–	if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
99	–	valid_type=1;
100	–	break;
101	–	}
102	–	}
103	–
180		if(valid_type){
181		if(num_disks>watermark-1){
182		disk_ptr=disk_stats;
#	Line 114 | Line 190 | disk_stat_t *get_disk_stats(int *entries){
190		}
191
192		disk_ptr=disk_stats+num_disks;
193	<
193	>	#ifdef ALLBSD
194	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
195	>	return NULL;
196	>	}
197	>
198	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
199	>	return NULL;
200	>	}
201	>
202	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
203	>	return NULL;
204	>	}
205	>
206	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
207	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
208	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
209	>
210	>	disk_ptr->total_inodes=(long long)mp->f_files;
211	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
212	>	/* Freebsd doesn't have a "available" inodes */
213	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
214	>	#endif
215	>	#if defined(LINUX) || defined(CYGWIN)
216	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
217	>	return NULL;
218	>	}
219	>
220	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
221	>	return NULL;
222	>	}
223	>
224	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
225	>	return NULL;
226	>	}
227	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
228	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
229	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
230	>
231	>	disk_ptr->total_inodes=(long long)fs.f_files;
232	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
233	>	/* Linux doesn't have a "available" inodes */
234	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
235	>	#endif
236	>
237	>	#ifdef SOLARIS
238		/* Memory leak in event of realloc failing */
239		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
240	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
241	<	of a k each */
240	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
241	>	* be upwards of a k each
242	>	*/
243		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
244		return NULL;
245		}
#	Line 138 | Line 259 | disk_stat_t *get_disk_stats(int *entries){
259		disk_ptr->total_inodes=(long long)fs.f_files;
260		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
261		disk_ptr->free_inodes=(long long)fs.f_favail;
262	<
262	>	#endif
263		num_disks++;
264		}
265		}
266
267		*entries=num_disks;
268
269	<	/* If this fails, there is very little i can do about it, so i'll ignore it :) */
269	>	/* If this fails, there is very little i can do about it, so
270	>	I'll ignore it :) */
271	>	#if defined(LINUX) || defined(CYGWIN)
272	>	endmntent(f);
273	>	#endif
274	>	#if defined(SOLARIS)
275		fclose(f);
276	+	#endif
277
278		return disk_stats;
279
280		}
154	–
281		void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
282
283		for(diskio_stats+=start; start<end; start++){
#	Line 190 | Line 316 | diskio_stat_t *diskio_stat_malloc(int needed_entries,
316		static diskio_stat_t *diskio_stats=NULL;
317		static int num_diskio=0;
318
319	+	#ifdef LINUX
320	+	typedef struct {
321	+	int major;
322	+	int minor;
323	+	} partition;
324	+	#endif
325	+
326		diskio_stat_t *get_diskio_stats(int *entries){
327
328		static int sizeof_diskio_stats=0;
329	+	#ifndef LINUX
330		diskio_stat_t *diskio_stats_ptr;
331	+	#endif
332
333	+	#ifdef SOLARIS
334		kstat_ctl_t *kc;
335		kstat_t *ksp;
336		kstat_io_t kios;
337	+	#endif
338	+	#ifdef LINUX
339	+	FILE *f;
340	+	char *line_ptr;
341	+	int major, minor;
342	+	int has_pp_stats = 1;
343	+	static partition *parts = NULL;
344	+	static int alloc_parts = 0;
345	+	int i, n;
346	+	time_t now;
347	+	const char *format;
348	+	#endif
349	+	#ifdef FREEBSD
350	+	static struct statinfo stats;
351	+	static int stats_init = 0;
352	+	int counter;
353	+	struct device_selection *dev_sel = NULL;
354	+	int n_selected, n_selections;
355	+	long sel_gen;
356	+	struct devstat *dev_ptr;
357	+	#endif
358	+	#ifdef NETBSD
359	+	struct disk_sysctl *stats;
360	+	int num_disks, i;
361	+	int mib[3];
362	+	size_t size;
363	+	#endif
364
365	+	num_diskio=0;
366	+
367	+	#ifdef NETBSD
368	+	mib[0] = CTL_HW;
369	+	mib[1] = HW_DISKSTATS;
370	+	mib[2] = sizeof(struct disk_sysctl);
371	+
372	+	if (sysctl(mib, 3, NULL, &size, NULL, 0) < 0) {
373	+	return NULL;
374	+	}
375	+	num_disks = size / sizeof(struct disk_sysctl);
376	+
377	+	stats = malloc(size);
378	+	if (stats == NULL) {
379	+	return NULL;
380	+	}
381	+
382	+	if (sysctl(mib, 3, stats, &size, NULL, 0) < 0) {
383	+	return NULL;
384	+	}
385	+
386	+	for (i = 0; i < num_disks; i++) {
387	+	u_int64_t rbytes, wbytes;
388	+
389	+	#ifdef HAVE_DK_RBYTES
390	+	rbytes = stats[i].dk_rbytes;
391	+	wbytes = stats[i].dk_wbytes;
392	+	#else
393	+	/* Before 1.7, NetBSD merged reads and writes. */
394	+	rbytes = wbytes = stats[i].dk_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	+	diskio_stats = diskio_stat_malloc(num_diskio + 1,
403	+	&sizeof_diskio_stats,
404	+	diskio_stats);
405	+	if (diskio_stats == NULL) {
406	+	return NULL;
407	+	}
408	+	diskio_stats_ptr = diskio_stats + num_diskio;
409	+
410	+	diskio_stats_ptr->read_bytes = rbytes;
411	+	diskio_stats_ptr->write_bytes = wbytes;
412	+	if (diskio_stats_ptr->disk_name != NULL) {
413	+	free(diskio_stats_ptr->disk_name);
414	+	}
415	+	diskio_stats_ptr->disk_name = strdup(stats[i].dk_name);
416	+	diskio_stats_ptr->systime = time(NULL);
417	+
418	+	num_diskio++;
419	+	}
420	+
421	+	free(stats);
422	+	#endif
423	+
424	+	#ifdef FREEBSD
425	+	if (!stats_init) {
426	+	stats.dinfo=malloc(sizeof(struct devinfo));
427	+	if(stats.dinfo==NULL) return NULL;
428	+	bzero(stats.dinfo, sizeof(struct devinfo));
429	+	stats_init = 1;
430	+	}
431	+	#ifdef FREEBSD5
432	+	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
433	+	/* Not aware of a get all devices, so i said 999. If we ever
434	+	* find a machine with more than 999 disks, then i'll change
435	+	* this number :)
436	+	*/
437	+	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;
438	+	#else
439	+	if ((getdevs(&stats)) < 0) return NULL;
440	+	/* Not aware of a get all devices, so i said 999. If we ever
441	+	* find a machine with more than 999 disks, then i'll change
442	+	* this number :)
443	+	*/
444	+	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;
445	+	#endif
446	+
447	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
448	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
449	+
450	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
451	+	* devices.. like mem, proc.. and also doesn't report floppy
452	+	* drives etc unless they are doing stuff :)
453	+	*/
454	+	#ifdef FREEBSD5
455	+	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
456	+	#else
457	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
458	+	#endif
459	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
460	+	return NULL;
461	+	}
462	+	diskio_stats_ptr=diskio_stats+num_diskio;
463	+
464	+	#ifdef FREEBSD5
465	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
466	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
467	+	#else
468	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
469	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
470	+	#endif
471	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
472	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
473	+	diskio_stats_ptr->systime=time(NULL);
474	+
475	+	num_diskio++;
476	+	}
477	+	free(dev_sel);
478	+
479	+	#endif
480	+	#ifdef SOLARIS
481		if ((kc = kstat_open()) == NULL) {
482		return NULL;
483		}
484
206	–	num_diskio=0;
207	–
485		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
486		if (!strcmp(ksp->ks_class, "disk")) {
487
#	Line 226 | Line 503 | diskio_stat_t *get_diskio_stats(int *entries){
503
504		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
505
506	<	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
506	>	diskio_stats_ptr->disk_name=strdup((char *) get_svr_from_bsd(ksp->ks_name));
507	>	diskio_stats_ptr->systime=time(NULL);
508		num_diskio++;
509		}
510		}
511
512		kstat_close(kc);
513	+	#endif
514
515	+	#ifdef LINUX
516	+	num_diskio = 0;
517	+	n = 0;
518	+
519	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
520	+	have statistics in here too, so we can use those directly.
521	+	2.6 kernels have /proc/diskstats instead with almost (but not quite)
522	+	the same format. */
523	+
524	+	f = fopen("/proc/diskstats", "r");
525	+	format = " %d %d %19s %*d %*d %lld %*d %*d %*d %lld";
526	+	if (f == NULL) {
527	+	f = fopen("/proc/partitions", "r");
528	+	format = " %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld";
529	+	}
530	+	if (f == NULL) goto out;
531	+	now = time(NULL);
532	+
533	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
534	+	char name[20];
535	+	char *s;
536	+	long long rsect, wsect;
537	+
538	+	int nr = sscanf(line_ptr, format,
539	+	&major, &minor, name, &rsect, &wsect);
540	+	if (nr < 3) continue;
541	+
542	+	/* Skip device names ending in numbers, since they're
543	+	partitions. */
544	+	s = name;
545	+	while (*s != '\0') s++;
546	+	--s;
547	+	if (*s >= '0' && *s <= '9') continue;
548	+
549	+	if (nr < 5) {
550	+	has_pp_stats = 0;
551	+	rsect = 0;
552	+	wsect = 0;
553	+	}
554	+
555	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
556	+	diskio_stats);
557	+	if (diskio_stats == NULL) goto out;
558	+	if (n >= alloc_parts) {
559	+	alloc_parts += 16;
560	+	parts = realloc(parts, alloc_parts * sizeof *parts);
561	+	if (parts == NULL) {
562	+	alloc_parts = 0;
563	+	goto out;
564	+	}
565	+	}
566	+
567	+	if (diskio_stats[n].disk_name != NULL)
568	+	free(diskio_stats[n].disk_name);
569	+	diskio_stats[n].disk_name = strdup(name);
570	+	diskio_stats[n].read_bytes = rsect * 512;
571	+	diskio_stats[n].write_bytes = wsect * 512;
572	+	diskio_stats[n].systime = now;
573	+	parts[n].major = major;
574	+	parts[n].minor = minor;
575	+
576	+	n++;
577	+	}
578	+
579	+	if (!has_pp_stats) {
580	+	/* This is an older kernel without stats in /proc/partitions.
581	+	Read what we can from /proc/stat instead. */
582	+
583	+	f = fopen("/proc/stat", "r");
584	+	if (f == NULL) goto out;
585	+	now = time(NULL);
586	+
587	+	line_ptr = f_read_line(f, "disk_io:");
588	+	if (line_ptr == NULL) goto out;
589	+
590	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
591	+	long long rsect, wsect;
592	+
593	+	if (*++line_ptr == '\0') break;
594	+
595	+	if((sscanf(line_ptr,
596	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
597	+	&major, &minor, &rsect, &wsect)) != 4) {
598	+	continue;
599	+	}
600	+
601	+	/* Find the corresponding device from earlier.
602	+	Just to add to the fun, "minor" is actually the disk
603	+	number, not the device minor, so we need to figure
604	+	out the real minor number based on the major!
605	+	This list is not exhaustive; if you're running
606	+	an older kernel you probably don't have fancy
607	+	I2O hardware anyway... */
608	+	switch (major) {
609	+	case 3:
610	+	case 21:
611	+	case 22:
612	+	case 33:
613	+	case 34:
614	+	case 36:
615	+	case 56:
616	+	case 57:
617	+	case 88:
618	+	case 89:
619	+	case 90:
620	+	case 91:
621	+	minor *= 64;
622	+	break;
623	+	case 9:
624	+	case 43:
625	+	break;
626	+	default:
627	+	minor *= 16;
628	+	break;
629	+	}
630	+	for (i = 0; i < n; i++) {
631	+	if (major == parts[i].major
632	+	&& minor == parts[i].minor)
633	+	break;
634	+	}
635	+	if (i == n) continue;
636	+
637	+	/* We read the number of blocks. Blocks are stored in
638	+	512 bytes */
639	+	diskio_stats[i].read_bytes = rsect * 512;
640	+	diskio_stats[i].write_bytes = wsect * 512;
641	+	diskio_stats[i].systime = now;
642	+	}
643	+	}
644	+
645	+	num_diskio = n;
646	+	out:
647	+	if (f != NULL) fclose(f);
648	+	#endif
649	+
650	+	#ifdef CYGWIN
651	+	return NULL;
652	+	#endif
653	+
654		*entries=num_diskio;
655
656		return diskio_stats;
#	Line 299 | Line 717 | diskio_stat_t *get_diskio_stats_diff(int *entries){
717		diskio_stats_diff_ptr++;
718
719		}
720	<
720	>
721	>	*entries=sizeof_diskio_stats_diff;
722		return diskio_stats_diff;
723		}

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