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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 1.9 by pajs, Tue Mar 4 12:55:14 2003 UTC vs.
Revision 1.20 by ats, Thu Aug 28 23:05:56 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 <stdio.h>
26		#include <stdlib.h>
27		#include <string.h>
28		#include "statgrab.h"
29
30		#ifdef SOLARIS
30	–	#include <stdio.h>
31		#include <sys/mnttab.h>
32		#include <sys/statvfs.h>
33		#include <kstat.h>
#	Line 35 | Line 35
35		#endif
36
37		#ifdef LINUX
38	–	#include <stdio.h>
38		#include <sys/vfs.h>
39		#include <mntent.h>
40	+	#include "tools.h"
41		#define VALID_FS_TYPES {"ext2", "ext3", "xfs", "reiserfs", "vfat", "tmpfs"}
42		#endif
43
44	+	#ifdef FREEBSD
45	+	#include <sys/param.h>
46	+	#include <sys/ucred.h>
47	+	#include <sys/mount.h>
48	+	#include <sys/dkstat.h>
49	+	#include <devstat.h>
50	+	#define VALID_FS_TYPES {"ufs", "mfs"}
51	+	#endif
52		#define START_VAL 1
53
54		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 75 | Line 83 | disk_stat_t *get_disk_stats(int *entries){
83		char *fs_types[] = VALID_FS_TYPES;
84		int x, valid_type;
85		int num_disks=0;
86	+	#if defined(LINUX) || defined (SOLARIS)
87		FILE *f;
88	+	#endif
89
90		disk_stat_t *disk_ptr;
91
92		#ifdef SOLARIS
93	<	struct mnttab *mp;
93	>	struct mnttab mp;
94		struct statvfs fs;
95		#endif
96		#ifdef LINUX
97		struct mntent *mp;
98		struct statfs fs;
99		#endif
100	+	#ifdef FREEBSD
101	+	int nummnt;
102	+	struct statfs *mp;
103	+	#endif
104
105		if(watermark==-1){
106		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
#	Line 96 | Line 110 | disk_stat_t *get_disk_stats(int *entries){
110		watermark=START_VAL;
111		init_disk_stat(0, watermark-1, disk_stats);
112		}
113	+	#ifdef FREEBSD
114	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
115	+	if (nummnt<=0){
116	+	return NULL;
117	+	}
118	+	for(;nummnt--; mp++){
119	+	valid_type=0;
120	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
121	+	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
122	+	valid_type=1;
123	+	break;
124	+	}
125	+	}
126	+	#endif
127	+
128		#ifdef LINUX
129		if ((f=setmntent("/etc/mtab", "r" ))==NULL){
130		return NULL;
#	Line 145 | Line 174 | disk_stat_t *get_disk_stats(int *entries){
174		}
175
176		disk_ptr=disk_stats+num_disks;
177	+	#ifdef FREEBSD
178	+	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
179	+	return NULL;
180	+	}
181	+
182	+	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
183	+	return NULL;
184	+	}
185	+
186	+	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
187	+	return NULL;
188	+	}
189	+
190	+	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
191	+	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
192	+	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
193	+
194	+	disk_ptr->total_inodes=(long long)mp->f_files;
195	+	disk_ptr->free_inodes=(long long)mp->f_ffree;
196	+	/* Freebsd doesn't have a "available" inodes */
197	+	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
198	+	#endif
199		#ifdef LINUX
200		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
201		return NULL;
#	Line 200 | Line 251 | disk_stat_t *get_disk_stats(int *entries){
251		*entries=num_disks;
252
253		/* If this fails, there is very little i can do about it, so i'll ignore it :) */
254	+	#if defined(LINUX) || defined(SOLARIS)
255		fclose(f);
256	+	#endif
257
258		return disk_stats;
259
260		}
208	–	#ifdef SOLARIS
261		void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
262
263		for(diskio_stats+=start; start<end; start++){
#	Line 244 | Line 296 | diskio_stat_t *diskio_stat_malloc(int needed_entries,
296		static diskio_stat_t *diskio_stats=NULL;
297		static int num_diskio=0;
298
299	+	#ifdef LINUX
300	+	typedef struct {
301	+	int major;
302	+	int minor;
303	+	} partition;
304	+	#endif
305	+
306		diskio_stat_t *get_diskio_stats(int *entries){
307
308		static int sizeof_diskio_stats=0;
309		diskio_stat_t *diskio_stats_ptr;
310
311	+	#ifdef SOLARIS
312		kstat_ctl_t *kc;
313		kstat_t *ksp;
314		kstat_io_t kios;
315	+	#endif
316	+	#ifdef LINUX
317	+	FILE *f;
318	+	char *line_ptr;
319	+	int major, minor;
320	+	char dev_letter;
321	+	int has_pp_stats = 1;
322	+	static partition *parts = NULL;
323	+	static int alloc_parts = 0;
324	+	int i, n;
325	+	time_t now;
326	+	#endif
327	+	#ifdef FREEBSD
328	+	struct statinfo stats;
329	+	int counter;
330	+	struct device_selection *dev_sel = NULL;
331	+	int n_selected, n_selections;
332	+	long sel_gen;
333	+	struct devstat *dev_ptr;
334	+	#endif
335	+	num_diskio=0;
336
337	+	#ifdef FREEBSD
338	+	stats.dinfo=malloc(sizeof(struct devinfo));
339	+	if(stats.dinfo==NULL) return NULL;
340	+	if ((getdevs(&stats)) < 0) return NULL;
341	+	/* Not aware of a get all devices, so i said 999. If we ever
342	+	* find a machine with more than 999 disks, then i'll change
343	+	* this number :)
344	+	*/
345	+	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;
346	+
347	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
348	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
349	+
350	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
351	+	* devices.. like mem, proc.. and also doesn't report floppy
352	+	* drives etc unless they are doing stuff :)
353	+	*/
354	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
355	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
356	+	return NULL;
357	+	}
358	+	diskio_stats_ptr=diskio_stats+num_diskio;
359	+
360	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
361	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
362	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
363	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
364	+	diskio_stats_ptr->systime=time(NULL);
365	+
366	+	num_diskio++;
367	+	}
368	+	free(dev_sel);
369	+	free(stats.dinfo);
370	+
371	+	#endif
372	+	#ifdef SOLARIS
373		if ((kc = kstat_open()) == NULL) {
374		return NULL;
375		}
376
260	–	num_diskio=0;
261	–
377		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
378		if (!strcmp(ksp->ks_class, "disk")) {
379
#	Line 281 | Line 396 | diskio_stat_t *get_diskio_stats(int *entries){
396		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
397
398		diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
399	+	diskio_stats_ptr->systime=time(NULL);
400		num_diskio++;
401		}
402		}
403
404		kstat_close(kc);
405	+	#endif
406
407	+	#ifdef LINUX
408	+	num_diskio = 0;
409	+	n = 0;
410	+
411	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
412	+	have statistics in here too, so we can use those directly. */
413	+
414	+	f = fopen("/proc/partitions", "r");
415	+	if (f == NULL) goto out;
416	+	now = time(NULL);
417	+
418	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
419	+	char name[20];
420	+	char *s;
421	+	long long rsect, wsect;
422	+
423	+	int nr = sscanf(line_ptr,
424	+	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
425	+	&major, &minor, name, &rsect, &wsect);
426	+	if (nr < 3) continue;
427	+	if (nr < 5) {
428	+	has_pp_stats = 0;
429	+	rsect = 0;
430	+	wsect = 0;
431	+	}
432	+
433	+	/* Skip device names ending in numbers, since they're
434	+	partitions. */
435	+	s = name;
436	+	while (*s != '\0') s++;
437	+	--s;
438	+	if (*s >= '0' && *s <= '9') continue;
439	+
440	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
441	+	diskio_stats);
442	+	if (diskio_stats == NULL) goto out;
443	+	if (n >= alloc_parts) {
444	+	alloc_parts += 16;
445	+	parts = realloc(parts, alloc_parts * sizeof *parts);
446	+	if (parts == NULL) {
447	+	alloc_parts = 0;
448	+	goto out;
449	+	}
450	+	}
451	+
452	+	if (diskio_stats[n].disk_name != NULL)
453	+	free(diskio_stats[n].disk_name);
454	+	diskio_stats[n].disk_name = strdup(name);
455	+	diskio_stats[n].read_bytes = rsect * 512;
456	+	diskio_stats[n].write_bytes = wsect * 512;
457	+	diskio_stats[n].systime = now;
458	+	parts[n].major = major;
459	+	parts[n].minor = minor;
460	+
461	+	n++;
462	+	}
463	+
464	+	if (!has_pp_stats) {
465	+	/* This is an older kernel without stats in /proc/partitions.
466	+	Read what we can from /proc/stat instead. */
467	+
468	+	f = fopen("/proc/stat", "r");
469	+	if (f == NULL) goto out;
470	+	now = time(NULL);
471	+
472	+	line_ptr = f_read_line(f, "disk_io:");
473	+	if (line_ptr == NULL) goto out;
474	+
475	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
476	+	long long rsect, wsect;
477	+
478	+	if (*++line_ptr == '\0') break;
479	+
480	+	if((sscanf(line_ptr,
481	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
482	+	&major, &minor, &rsect, &wsect)) != 4) {
483	+	continue;
484	+	}
485	+
486	+	/* Find the corresponding device from earlier.
487	+	Just to add to the fun, "minor" is actually the disk
488	+	number, not the device minor, so we need to figure
489	+	out the real minor number based on the major!
490	+	This list is not exhaustive; if you're running
491	+	an older kernel you probably don't have fancy
492	+	I2O hardware anyway... */
493	+	switch (major) {
494	+	case 3:
495	+	case 21:
496	+	case 22:
497	+	case 33:
498	+	case 34:
499	+	case 36:
500	+	case 56:
501	+	case 57:
502	+	case 88:
503	+	case 89:
504	+	case 90:
505	+	case 91:
506	+	minor *= 64;
507	+	break;
508	+	case 9:
509	+	case 43:
510	+	break;
511	+	default:
512	+	minor *= 16;
513	+	break;
514	+	}
515	+	for (i = 0; i < n; i++) {
516	+	if (major == parts[i].major
517	+	&& minor == parts[i].minor)
518	+	break;
519	+	}
520	+	if (i == n) continue;
521	+
522	+	/* We read the number of blocks. Blocks are stored in
523	+	512 bytes */
524	+	diskio_stats[i].read_bytes = rsect * 512;
525	+	diskio_stats[i].write_bytes = wsect * 512;
526	+	diskio_stats[i].systime = now;
527	+	}
528	+	}
529	+
530	+	num_diskio = n;
531	+	out:
532	+	if (f != NULL) fclose(f);
533	+
534	+	#endif
535		*entries=num_diskio;
536
537		return diskio_stats;
#	Line 357 | Line 602 | diskio_stat_t *get_diskio_stats_diff(int *entries){
602		*entries=sizeof_diskio_stats_diff;
603		return diskio_stats_diff;
604		}
360	–	#endif

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