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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 1.37 by ats, Sun Oct 19 21:22:09 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 "statgrab.h"
29
#	Line 34 | Line 34
34		#define VALID_FS_TYPES {"ufs", "tmpfs"}
35		#endif
36
37	+	#ifdef LINUX
38	+	#include <time.h>
39	+	#include <sys/vfs.h>
40	+	#include <mntent.h>
41	+	#include "tools.h"
42	+	#define VALID_FS_TYPES {"adfs", "affs", "befs", "bfs", "efs", "ext2", \
43	+	"ext3", "vxfs", "hfs", "hfsplus", "hpfs", "jffs", \
44	+	"jffs2", "minix", "msdos", "ntfs", "qnx4", "ramfs", \
45	+	"rootfs", "reiserfs", "sysv", "v7", "udf", "ufs", \
46	+	"umsdos", "vfat", "xfs", "jfs"}
47	+	#endif
48	+
49	+	#ifdef ALLBSD
50	+	#include <sys/param.h>
51	+	#include <sys/ucred.h>
52	+	#include <sys/mount.h>
53	+	#endif
54	+	#ifdef FREEBSD
55	+	#include <sys/dkstat.h>
56	+	#include <devstat.h>
57	+	#define VALID_FS_TYPES {"hpfs", "msdosfs", "ntfs", "udf", "ext2fs", \
58	+	"ufs", "mfs"}
59	+	#endif
60	+	#ifdef NETBSD
61	+	#include <sys/param.h>
62	+	#include <sys/sysctl.h>
63	+	#include <sys/disk.h>
64	+	#define VALID_FS_TYPES {"ffs", "mfs", "msdos", "lfs", "adosfs", "ext2fs", \
65	+	"ntfs"}
66	+	#endif
67	+
68		#define START_VAL 1
69
70		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 67 | Line 98 | disk_stat_t *get_disk_stats(int *entries){
98
99		char *fs_types[] = VALID_FS_TYPES;
100		int x, valid_type;
70	–
101		int num_disks=0;
102	<	struct mnttab mp;
73	<	struct statvfs fs;
102	>	#if defined(LINUX) || defined (SOLARIS)
103		FILE *f;
104	+	#endif
105
106		disk_stat_t *disk_ptr;
107
108	+	#ifdef SOLARIS
109	+	struct mnttab mp;
110	+	struct statvfs fs;
111	+	#endif
112	+	#ifdef LINUX
113	+	struct mntent *mp;
114	+	struct statfs fs;
115	+	#endif
116	+	#ifdef ALLBSD
117	+	int nummnt;
118	+	struct statfs *mp;
119	+	#endif
120	+
121		if(watermark==-1){
122		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
123		if(disk_stats==NULL){
#	Line 83 | Line 126 | disk_stat_t *get_disk_stats(int *entries){
126		watermark=START_VAL;
127		init_disk_stat(0, watermark-1, disk_stats);
128		}
129	+	#ifdef ALLBSD
130	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
131	+	if (nummnt<=0){
132	+	return NULL;
133	+	}
134	+	for(;nummnt--; mp++){
135	+	valid_type=0;
136	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
137	+	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
138	+	valid_type=1;
139	+	break;
140	+	}
141	+	}
142	+	#endif
143
144	+	#ifdef LINUX
145	+	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
146	+	return NULL;
147	+	}
148
149	+	while((mp=getmntent(f))){
150	+	if((statfs(mp->mnt_dir, &fs)) !=0){
151	+	continue;
152	+	}
153	+
154	+	valid_type=0;
155	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
156	+	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
157	+	valid_type=1;
158	+	break;
159	+	}
160	+	}
161	+	#endif
162	+
163	+	#ifdef SOLARIS
164		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
165		return NULL;
166		}
#	Line 92 | Line 168 | disk_stat_t *get_disk_stats(int *entries){
168		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
169		continue;
170		}
95	–
171		valid_type=0;
172		for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
173		if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
#	Line 100 | Line 175 | disk_stat_t *get_disk_stats(int *entries){
175		break;
176		}
177		}
178	+	#endif
179
180		if(valid_type){
181		if(num_disks>watermark-1){
#	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	>	#ifdef LINUX
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		}
#	Line 146 | Line 267 | disk_stat_t *get_disk_stats(int *entries){
267		*entries=num_disks;
268
269		/* If this fails, there is very little i can do about it, so i'll ignore it :) */
270	+	#if defined(LINUX) || defined(SOLARIS)
271		fclose(f);
272	+	#endif
273
274		return disk_stats;
275
276		}
154	–
277		void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
278
279		for(diskio_stats+=start; start<end; start++){
#	Line 190 | Line 312 | diskio_stat_t *diskio_stat_malloc(int needed_entries,
312		static diskio_stat_t *diskio_stats=NULL;
313		static int num_diskio=0;
314
315	+	#ifdef LINUX
316	+	typedef struct {
317	+	int major;
318	+	int minor;
319	+	} partition;
320	+	#endif
321	+
322		diskio_stat_t *get_diskio_stats(int *entries){
323
324		static int sizeof_diskio_stats=0;
325		diskio_stat_t *diskio_stats_ptr;
326
327	+	#ifdef SOLARIS
328		kstat_ctl_t *kc;
329		kstat_t *ksp;
330		kstat_io_t kios;
331	+	#endif
332	+	#ifdef LINUX
333	+	FILE *f;
334	+	char *line_ptr;
335	+	int major, minor;
336	+	char dev_letter;
337	+	int has_pp_stats = 1;
338	+	static partition *parts = NULL;
339	+	static int alloc_parts = 0;
340	+	int i, n;
341	+	time_t now;
342	+	#endif
343	+	#ifdef FREEBSD
344	+	static struct statinfo stats;
345	+	static int stats_init = 0;
346	+	int counter;
347	+	struct device_selection *dev_sel = NULL;
348	+	int n_selected, n_selections;
349	+	long sel_gen;
350	+	struct devstat *dev_ptr;
351	+	#endif
352	+	#ifdef NETBSD
353	+	struct disk_sysctl *stats;
354	+	int num_disks, i;
355	+	int mib[3];
356	+	size_t size;
357	+	#endif
358
359	+	num_diskio=0;
360	+
361	+	#ifdef NETBSD
362	+	mib[0] = CTL_HW;
363	+	mib[1] = HW_DISKSTATS;
364	+	mib[2] = sizeof(struct disk_sysctl);
365	+
366	+	if (sysctl(mib, 3, NULL, &size, NULL, 0) < 0) {
367	+	return NULL;
368	+	}
369	+	num_disks = size / sizeof(struct disk_sysctl);
370	+
371	+	stats = malloc(size);
372	+	if (stats == NULL) {
373	+	return NULL;
374	+	}
375	+
376	+	if (sysctl(mib, 3, stats, &size, NULL, 0) < 0) {
377	+	return NULL;
378	+	}
379	+
380	+	for (i = 0; i < num_disks; i++) {
381	+	u_int64_t rbytes, wbytes;
382	+
383	+	#ifdef HAVE_DK_RBYTES
384	+	rbytes = stats[i].dk_rbytes;
385	+	wbytes = stats[i].dk_wbytes;
386	+	#else
387	+	/* Before 1.7, NetBSD merged reads and writes. */
388	+	rbytes = wbytes = stats[i].dk_bytes;
389	+	#endif
390	+
391	+	/* Don't keep stats for disks that have never been used. */
392	+	if (rbytes == 0 && wbytes == 0) {
393	+	continue;
394	+	}
395	+
396	+	diskio_stats = diskio_stat_malloc(num_diskio + 1,
397	+	&sizeof_diskio_stats,
398	+	diskio_stats);
399	+	if (diskio_stats == NULL) {
400	+	return NULL;
401	+	}
402	+	diskio_stats_ptr = diskio_stats + num_diskio;
403	+
404	+	diskio_stats_ptr->read_bytes = rbytes;
405	+	diskio_stats_ptr->write_bytes = wbytes;
406	+	if (diskio_stats_ptr->disk_name != NULL) {
407	+	free(diskio_stats_ptr->disk_name);
408	+	}
409	+	diskio_stats_ptr->disk_name = strdup(stats[i].dk_name);
410	+	diskio_stats_ptr->systime = time(NULL);
411	+
412	+	num_diskio++;
413	+	}
414	+
415	+	free(stats);
416	+	#endif
417	+
418	+	#ifdef FREEBSD
419	+	if (!stats_init) {
420	+	stats.dinfo=malloc(sizeof(struct devinfo));
421	+	if(stats.dinfo==NULL) return NULL;
422	+	bzero(stats.dinfo, sizeof(struct devinfo));
423	+	stats_init = 1;
424	+	}
425	+	#ifdef FREEBSD5
426	+	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
427	+	/* Not aware of a get all devices, so i said 999. If we ever
428	+	* find a machine with more than 999 disks, then i'll change
429	+	* this number :)
430	+	*/
431	+	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;
432	+	#else
433	+	if ((getdevs(&stats)) < 0) return NULL;
434	+	/* Not aware of a get all devices, so i said 999. If we ever
435	+	* find a machine with more than 999 disks, then i'll change
436	+	* this number :)
437	+	*/
438	+	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;
439	+	#endif
440	+
441	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
442	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
443	+
444	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
445	+	* devices.. like mem, proc.. and also doesn't report floppy
446	+	* drives etc unless they are doing stuff :)
447	+	*/
448	+	#ifdef FREEBSD5
449	+	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
450	+	#else
451	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
452	+	#endif
453	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
454	+	return NULL;
455	+	}
456	+	diskio_stats_ptr=diskio_stats+num_diskio;
457	+
458	+	#ifdef FREEBSD5
459	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
460	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
461	+	#else
462	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
463	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
464	+	#endif
465	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
466	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
467	+	diskio_stats_ptr->systime=time(NULL);
468	+
469	+	num_diskio++;
470	+	}
471	+	free(dev_sel);
472	+
473	+	#endif
474	+	#ifdef SOLARIS
475		if ((kc = kstat_open()) == NULL) {
476		return NULL;
477		}
478
206	–	num_diskio=0;
207	–
479		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
480		if (!strcmp(ksp->ks_class, "disk")) {
481
#	Line 227 | Line 498 | diskio_stat_t *get_diskio_stats(int *entries){
498		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
499
500		diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
501	+	diskio_stats_ptr->systime=time(NULL);
502		num_diskio++;
503		}
504		}
505
506		kstat_close(kc);
507	+	#endif
508
509	+	#ifdef LINUX
510	+	num_diskio = 0;
511	+	n = 0;
512	+
513	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
514	+	have statistics in here too, so we can use those directly. */
515	+
516	+	f = fopen("/proc/partitions", "r");
517	+	if (f == NULL) goto out;
518	+	now = time(NULL);
519	+
520	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
521	+	char name[20];
522	+	char *s;
523	+	long long rsect, wsect;
524	+
525	+	int nr = sscanf(line_ptr,
526	+	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
527	+	&major, &minor, name, &rsect, &wsect);
528	+	if (nr < 3) continue;
529	+	if (nr < 5) {
530	+	has_pp_stats = 0;
531	+	rsect = 0;
532	+	wsect = 0;
533	+	}
534	+
535	+	/* Skip device names ending in numbers, since they're
536	+	partitions. */
537	+	s = name;
538	+	while (*s != '\0') s++;
539	+	--s;
540	+	if (*s >= '0' && *s <= '9') continue;
541	+
542	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
543	+	diskio_stats);
544	+	if (diskio_stats == NULL) goto out;
545	+	if (n >= alloc_parts) {
546	+	alloc_parts += 16;
547	+	parts = realloc(parts, alloc_parts * sizeof *parts);
548	+	if (parts == NULL) {
549	+	alloc_parts = 0;
550	+	goto out;
551	+	}
552	+	}
553	+
554	+	if (diskio_stats[n].disk_name != NULL)
555	+	free(diskio_stats[n].disk_name);
556	+	diskio_stats[n].disk_name = strdup(name);
557	+	diskio_stats[n].read_bytes = rsect * 512;
558	+	diskio_stats[n].write_bytes = wsect * 512;
559	+	diskio_stats[n].systime = now;
560	+	parts[n].major = major;
561	+	parts[n].minor = minor;
562	+
563	+	n++;
564	+	}
565	+
566	+	if (!has_pp_stats) {
567	+	/* This is an older kernel without stats in /proc/partitions.
568	+	Read what we can from /proc/stat instead. */
569	+
570	+	f = fopen("/proc/stat", "r");
571	+	if (f == NULL) goto out;
572	+	now = time(NULL);
573	+
574	+	line_ptr = f_read_line(f, "disk_io:");
575	+	if (line_ptr == NULL) goto out;
576	+
577	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
578	+	long long rsect, wsect;
579	+
580	+	if (*++line_ptr == '\0') break;
581	+
582	+	if((sscanf(line_ptr,
583	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
584	+	&major, &minor, &rsect, &wsect)) != 4) {
585	+	continue;
586	+	}
587	+
588	+	/* Find the corresponding device from earlier.
589	+	Just to add to the fun, "minor" is actually the disk
590	+	number, not the device minor, so we need to figure
591	+	out the real minor number based on the major!
592	+	This list is not exhaustive; if you're running
593	+	an older kernel you probably don't have fancy
594	+	I2O hardware anyway... */
595	+	switch (major) {
596	+	case 3:
597	+	case 21:
598	+	case 22:
599	+	case 33:
600	+	case 34:
601	+	case 36:
602	+	case 56:
603	+	case 57:
604	+	case 88:
605	+	case 89:
606	+	case 90:
607	+	case 91:
608	+	minor *= 64;
609	+	break;
610	+	case 9:
611	+	case 43:
612	+	break;
613	+	default:
614	+	minor *= 16;
615	+	break;
616	+	}
617	+	for (i = 0; i < n; i++) {
618	+	if (major == parts[i].major
619	+	&& minor == parts[i].minor)
620	+	break;
621	+	}
622	+	if (i == n) continue;
623	+
624	+	/* We read the number of blocks. Blocks are stored in
625	+	512 bytes */
626	+	diskio_stats[i].read_bytes = rsect * 512;
627	+	diskio_stats[i].write_bytes = wsect * 512;
628	+	diskio_stats[i].systime = now;
629	+	}
630	+	}
631	+
632	+	num_diskio = n;
633	+	out:
634	+	if (f != NULL) fclose(f);
635	+
636	+	#endif
637		*entries=num_diskio;
638
639		return diskio_stats;

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