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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 1.33 by ats, Sun Oct 19 11:23:21 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	+	#define VALID_FS_TYPES {"ufs", "mfs", "ffs"}
54	+	#endif
55	+	#ifdef FREEBSD
56	+	#include <sys/dkstat.h>
57	+	#include <devstat.h>
58	+	#endif
59	+
60		#define START_VAL 1
61
62		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 67 | Line 90 | disk_stat_t *get_disk_stats(int *entries){
90
91		char *fs_types[] = VALID_FS_TYPES;
92		int x, valid_type;
70	–
93		int num_disks=0;
94	<	struct mnttab mp;
73	<	struct statvfs fs;
94	>	#if defined(LINUX) || defined (SOLARIS)
95		FILE *f;
96	+	#endif
97
98		disk_stat_t *disk_ptr;
99
100	+	#ifdef SOLARIS
101	+	struct mnttab mp;
102	+	struct statvfs fs;
103	+	#endif
104	+	#ifdef LINUX
105	+	struct mntent *mp;
106	+	struct statfs fs;
107	+	#endif
108	+	#ifdef ALLBSD
109	+	int nummnt;
110	+	struct statfs *mp;
111	+	#endif
112	+
113		if(watermark==-1){
114		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
115		if(disk_stats==NULL){
#	Line 83 | Line 118 | disk_stat_t *get_disk_stats(int *entries){
118		watermark=START_VAL;
119		init_disk_stat(0, watermark-1, disk_stats);
120		}
121	+	#ifdef ALLBSD
122	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
123	+	if (nummnt<=0){
124	+	return NULL;
125	+	}
126	+	for(;nummnt--; mp++){
127	+	valid_type=0;
128	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
129	+	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
130	+	valid_type=1;
131	+	break;
132	+	}
133	+	}
134	+	#endif
135
136	+	#ifdef LINUX
137	+	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
138	+	return NULL;
139	+	}
140
141	+	while((mp=getmntent(f))){
142	+	if((statfs(mp->mnt_dir, &fs)) !=0){
143	+	continue;
144	+	}
145	+
146	+	valid_type=0;
147	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
148	+	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
149	+	valid_type=1;
150	+	break;
151	+	}
152	+	}
153	+	#endif
154	+
155	+	#ifdef SOLARIS
156		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
157		return NULL;
158		}
#	Line 92 | Line 160 | disk_stat_t *get_disk_stats(int *entries){
160		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
161		continue;
162		}
95	–
163		valid_type=0;
164		for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
165		if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
#	Line 100 | Line 167 | disk_stat_t *get_disk_stats(int *entries){
167		break;
168		}
169		}
170	+	#endif
171
172		if(valid_type){
173		if(num_disks>watermark-1){
#	Line 114 | Line 182 | disk_stat_t *get_disk_stats(int *entries){
182		}
183
184		disk_ptr=disk_stats+num_disks;
185	<
185	>	#ifdef ALLBSD
186	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
187	>	return NULL;
188	>	}
189	>
190	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
191	>	return NULL;
192	>	}
193	>
194	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
195	>	return NULL;
196	>	}
197	>
198	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
199	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
200	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
201	>
202	>	disk_ptr->total_inodes=(long long)mp->f_files;
203	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
204	>	/* Freebsd doesn't have a "available" inodes */
205	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
206	>	#endif
207	>	#ifdef LINUX
208	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
209	>	return NULL;
210	>	}
211	>
212	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
213	>	return NULL;
214	>	}
215	>
216	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
217	>	return NULL;
218	>	}
219	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
220	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
221	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
222	>
223	>	disk_ptr->total_inodes=(long long)fs.f_files;
224	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
225	>	/* Linux doesn't have a "available" inodes */
226	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
227	>	#endif
228	>
229	>	#ifdef SOLARIS
230		/* Memory leak in event of realloc failing */
231		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
232	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
233	<	of a k each */
232	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
233	>	* be upwards of a k each
234	>	*/
235		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
236		return NULL;
237		}
#	Line 138 | Line 251 | disk_stat_t *get_disk_stats(int *entries){
251		disk_ptr->total_inodes=(long long)fs.f_files;
252		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
253		disk_ptr->free_inodes=(long long)fs.f_favail;
254	<
254	>	#endif
255		num_disks++;
256		}
257		}
#	Line 146 | Line 259 | disk_stat_t *get_disk_stats(int *entries){
259		*entries=num_disks;
260
261		/* If this fails, there is very little i can do about it, so i'll ignore it :) */
262	+	#if defined(LINUX) || defined(SOLARIS)
263		fclose(f);
264	+	#endif
265
266		return disk_stats;
267
268		}
154	–
269		void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
270
271		for(diskio_stats+=start; start<end; start++){
#	Line 190 | Line 304 | diskio_stat_t *diskio_stat_malloc(int needed_entries,
304		static diskio_stat_t *diskio_stats=NULL;
305		static int num_diskio=0;
306
307	+	#ifdef LINUX
308	+	typedef struct {
309	+	int major;
310	+	int minor;
311	+	} partition;
312	+	#endif
313	+
314		diskio_stat_t *get_diskio_stats(int *entries){
315
316		static int sizeof_diskio_stats=0;
317		diskio_stat_t *diskio_stats_ptr;
318
319	+	#ifdef SOLARIS
320		kstat_ctl_t *kc;
321		kstat_t *ksp;
322		kstat_io_t kios;
323	+	#endif
324	+	#ifdef LINUX
325	+	FILE *f;
326	+	char *line_ptr;
327	+	int major, minor;
328	+	char dev_letter;
329	+	int has_pp_stats = 1;
330	+	static partition *parts = NULL;
331	+	static int alloc_parts = 0;
332	+	int i, n;
333	+	time_t now;
334	+	#endif
335	+	#ifdef FREEBSD
336	+	static struct statinfo stats;
337	+	static int stats_init = 0;
338	+	int counter;
339	+	struct device_selection *dev_sel = NULL;
340	+	int n_selected, n_selections;
341	+	long sel_gen;
342	+	struct devstat *dev_ptr;
343	+	#endif
344	+	#ifdef NETBSD
345	+	/* FIXME get_diskio_stats NYI on NetBSD.
346	+	* See vmstat/dkstats.c in NetBSD source for examples.
347	+	*/
348	+	#endif
349	+	num_diskio=0;
350
351	+	#ifdef FREEBSD
352	+	if (!stats_init) {
353	+	stats.dinfo=malloc(sizeof(struct devinfo));
354	+	if(stats.dinfo==NULL) return NULL;
355	+	bzero(stats.dinfo, sizeof(struct devinfo));
356	+	stats_init = 1;
357	+	}
358	+	#ifdef FREEBSD5
359	+	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
360	+	/* Not aware of a get all devices, so i said 999. If we ever
361	+	* find a machine with more than 999 disks, then i'll change
362	+	* this number :)
363	+	*/
364	+	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;
365	+	#else
366	+	if ((getdevs(&stats)) < 0) return NULL;
367	+	/* Not aware of a get all devices, so i said 999. If we ever
368	+	* find a machine with more than 999 disks, then i'll change
369	+	* this number :)
370	+	*/
371	+	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;
372	+	#endif
373	+
374	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
375	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
376	+
377	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
378	+	* devices.. like mem, proc.. and also doesn't report floppy
379	+	* drives etc unless they are doing stuff :)
380	+	*/
381	+	#ifdef FREEBSD5
382	+	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
383	+	#else
384	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
385	+	#endif
386	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
387	+	return NULL;
388	+	}
389	+	diskio_stats_ptr=diskio_stats+num_diskio;
390	+
391	+	#ifdef FREEBSD5
392	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
393	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
394	+	#else
395	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
396	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
397	+	#endif
398	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
399	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
400	+	diskio_stats_ptr->systime=time(NULL);
401	+
402	+	num_diskio++;
403	+	}
404	+	free(dev_sel);
405	+
406	+	#endif
407	+	#ifdef SOLARIS
408		if ((kc = kstat_open()) == NULL) {
409		return NULL;
410		}
411
206	–	num_diskio=0;
207	–
412		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
413		if (!strcmp(ksp->ks_class, "disk")) {
414
#	Line 227 | Line 431 | diskio_stat_t *get_diskio_stats(int *entries){
431		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
432
433		diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
434	+	diskio_stats_ptr->systime=time(NULL);
435		num_diskio++;
436		}
437		}
438
439		kstat_close(kc);
440	+	#endif
441
442	+	#ifdef LINUX
443	+	num_diskio = 0;
444	+	n = 0;
445	+
446	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
447	+	have statistics in here too, so we can use those directly. */
448	+
449	+	f = fopen("/proc/partitions", "r");
450	+	if (f == NULL) goto out;
451	+	now = time(NULL);
452	+
453	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
454	+	char name[20];
455	+	char *s;
456	+	long long rsect, wsect;
457	+
458	+	int nr = sscanf(line_ptr,
459	+	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
460	+	&major, &minor, name, &rsect, &wsect);
461	+	if (nr < 3) continue;
462	+	if (nr < 5) {
463	+	has_pp_stats = 0;
464	+	rsect = 0;
465	+	wsect = 0;
466	+	}
467	+
468	+	/* Skip device names ending in numbers, since they're
469	+	partitions. */
470	+	s = name;
471	+	while (*s != '\0') s++;
472	+	--s;
473	+	if (*s >= '0' && *s <= '9') continue;
474	+
475	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
476	+	diskio_stats);
477	+	if (diskio_stats == NULL) goto out;
478	+	if (n >= alloc_parts) {
479	+	alloc_parts += 16;
480	+	parts = realloc(parts, alloc_parts * sizeof *parts);
481	+	if (parts == NULL) {
482	+	alloc_parts = 0;
483	+	goto out;
484	+	}
485	+	}
486	+
487	+	if (diskio_stats[n].disk_name != NULL)
488	+	free(diskio_stats[n].disk_name);
489	+	diskio_stats[n].disk_name = strdup(name);
490	+	diskio_stats[n].read_bytes = rsect * 512;
491	+	diskio_stats[n].write_bytes = wsect * 512;
492	+	diskio_stats[n].systime = now;
493	+	parts[n].major = major;
494	+	parts[n].minor = minor;
495	+
496	+	n++;
497	+	}
498	+
499	+	if (!has_pp_stats) {
500	+	/* This is an older kernel without stats in /proc/partitions.
501	+	Read what we can from /proc/stat instead. */
502	+
503	+	f = fopen("/proc/stat", "r");
504	+	if (f == NULL) goto out;
505	+	now = time(NULL);
506	+
507	+	line_ptr = f_read_line(f, "disk_io:");
508	+	if (line_ptr == NULL) goto out;
509	+
510	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
511	+	long long rsect, wsect;
512	+
513	+	if (*++line_ptr == '\0') break;
514	+
515	+	if((sscanf(line_ptr,
516	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
517	+	&major, &minor, &rsect, &wsect)) != 4) {
518	+	continue;
519	+	}
520	+
521	+	/* Find the corresponding device from earlier.
522	+	Just to add to the fun, "minor" is actually the disk
523	+	number, not the device minor, so we need to figure
524	+	out the real minor number based on the major!
525	+	This list is not exhaustive; if you're running
526	+	an older kernel you probably don't have fancy
527	+	I2O hardware anyway... */
528	+	switch (major) {
529	+	case 3:
530	+	case 21:
531	+	case 22:
532	+	case 33:
533	+	case 34:
534	+	case 36:
535	+	case 56:
536	+	case 57:
537	+	case 88:
538	+	case 89:
539	+	case 90:
540	+	case 91:
541	+	minor *= 64;
542	+	break;
543	+	case 9:
544	+	case 43:
545	+	break;
546	+	default:
547	+	minor *= 16;
548	+	break;
549	+	}
550	+	for (i = 0; i < n; i++) {
551	+	if (major == parts[i].major
552	+	&& minor == parts[i].minor)
553	+	break;
554	+	}
555	+	if (i == n) continue;
556	+
557	+	/* We read the number of blocks. Blocks are stored in
558	+	512 bytes */
559	+	diskio_stats[i].read_bytes = rsect * 512;
560	+	diskio_stats[i].write_bytes = wsect * 512;
561	+	diskio_stats[i].systime = now;
562	+	}
563	+	}
564	+
565	+	num_diskio = n;
566	+	out:
567	+	if (f != NULL) fclose(f);
568	+
569	+	#endif
570		*entries=num_diskio;
571
572		return diskio_stats;

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