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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 1.6 by pajs, Sun Feb 23 23:28:19 2003 UTC vs.
Revision 1.31 by ats, Sun Oct 19 02:03:02 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 "statgrab.h"
26	–	#include <stdlib.h>
25		#include <stdio.h>
26	<	#include "ukcprog.h"
26	>	#include <stdlib.h>
27		#include <string.h>
28	+	#include "statgrab.h"
29
30		#ifdef SOLARIS
31		#include <sys/mnttab.h>
33	–	#include <sys/types.h>
32		#include <sys/statvfs.h>
33		#include <kstat.h>
36	–
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 {"ext2", "ext3", "xfs", "reiserfs", "vfat", "tmpfs"}
43		#endif
44
45	+	#ifdef ALLBSD
46	+	#include <sys/param.h>
47	+	#include <sys/ucred.h>
48	+	#include <sys/mount.h>
49	+	#define VALID_FS_TYPES {"ufs", "mfs", "ffs"}
50	+	#endif
51	+	#ifdef FREEBSD
52	+	#include <sys/dkstat.h>
53	+	#include <devstat.h>
54	+	#endif
55	+
56		#define START_VAL 1
57
58		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 71 | Line 86 | disk_stat_t *get_disk_stats(int *entries){
86
87		char *fs_types[] = VALID_FS_TYPES;
88		int x, valid_type;
74	–
89		int num_disks=0;
90	<	struct mnttab mp;
77	<	struct statvfs fs;
90	>	#if defined(LINUX) || defined (SOLARIS)
91		FILE *f;
92	+	#endif
93
94		disk_stat_t *disk_ptr;
95
96	+	#ifdef SOLARIS
97	+	struct mnttab mp;
98	+	struct statvfs fs;
99	+	#endif
100	+	#ifdef LINUX
101	+	struct mntent *mp;
102	+	struct statfs fs;
103	+	#endif
104	+	#ifdef ALLBSD
105	+	int nummnt;
106	+	struct statfs *mp;
107	+	#endif
108	+
109		if(watermark==-1){
110		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
111		if(disk_stats==NULL){
#	Line 87 | Line 114 | disk_stat_t *get_disk_stats(int *entries){
114		watermark=START_VAL;
115		init_disk_stat(0, watermark-1, disk_stats);
116		}
117	+	#ifdef ALLBSD
118	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
119	+	if (nummnt<=0){
120	+	return NULL;
121	+	}
122	+	for(;nummnt--; mp++){
123	+	valid_type=0;
124	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
125	+	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
126	+	valid_type=1;
127	+	break;
128	+	}
129	+	}
130	+	#endif
131
132	+	#ifdef LINUX
133	+	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
134	+	return NULL;
135	+	}
136
137	+	while((mp=getmntent(f))){
138	+	if((statfs(mp->mnt_dir, &fs)) !=0){
139	+	continue;
140	+	}
141	+
142	+	valid_type=0;
143	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
144	+	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
145	+	valid_type=1;
146	+	break;
147	+	}
148	+	}
149	+	#endif
150	+
151	+	#ifdef SOLARIS
152		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
153		return NULL;
154		}
#	Line 96 | Line 156 | disk_stat_t *get_disk_stats(int *entries){
156		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
157		continue;
158		}
99	–
159		valid_type=0;
160		for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
161		if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
#	Line 104 | Line 163 | disk_stat_t *get_disk_stats(int *entries){
163		break;
164		}
165		}
166	+	#endif
167
168		if(valid_type){
169		if(num_disks>watermark-1){
#	Line 118 | Line 178 | disk_stat_t *get_disk_stats(int *entries){
178		}
179
180		disk_ptr=disk_stats+num_disks;
181	<
181	>	#ifdef ALLBSD
182	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
183	>	return NULL;
184	>	}
185	>
186	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
187	>	return NULL;
188	>	}
189	>
190	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
191	>	return NULL;
192	>	}
193	>
194	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
195	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
196	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
197	>
198	>	disk_ptr->total_inodes=(long long)mp->f_files;
199	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
200	>	/* Freebsd doesn't have a "available" inodes */
201	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
202	>	#endif
203	>	#ifdef LINUX
204	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
205	>	return NULL;
206	>	}
207	>
208	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
209	>	return NULL;
210	>	}
211	>
212	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
213	>	return NULL;
214	>	}
215	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
216	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
217	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
218	>
219	>	disk_ptr->total_inodes=(long long)fs.f_files;
220	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
221	>	/* Linux doesn't have a "available" inodes */
222	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
223	>	#endif
224	>
225	>	#ifdef SOLARIS
226		/* Memory leak in event of realloc failing */
227		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
228	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
229	<	of a k each */
228	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
229	>	* be upwards of a k each
230	>	*/
231		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
232		return NULL;
233		}
#	Line 142 | Line 247 | disk_stat_t *get_disk_stats(int *entries){
247		disk_ptr->total_inodes=(long long)fs.f_files;
248		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
249		disk_ptr->free_inodes=(long long)fs.f_favail;
250	<
250	>	#endif
251		num_disks++;
252		}
253		}
#	Line 150 | Line 255 | disk_stat_t *get_disk_stats(int *entries){
255		*entries=num_disks;
256
257		/* If this fails, there is very little i can do about it, so i'll ignore it :) */
258	+	#if defined(LINUX) || defined(SOLARIS)
259		fclose(f);
260	+	#endif
261
262		return disk_stats;
263
264		}
158	–
265		void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
266
267		for(diskio_stats+=start; start<end; start++){
#	Line 194 | Line 300 | diskio_stat_t *diskio_stat_malloc(int needed_entries,
300		static diskio_stat_t *diskio_stats=NULL;
301		static int num_diskio=0;
302
303	+	#ifdef LINUX
304	+	typedef struct {
305	+	int major;
306	+	int minor;
307	+	} partition;
308	+	#endif
309	+
310		diskio_stat_t *get_diskio_stats(int *entries){
311
312		static int sizeof_diskio_stats=0;
313		diskio_stat_t *diskio_stats_ptr;
314
315	+	#ifdef SOLARIS
316		kstat_ctl_t *kc;
317		kstat_t *ksp;
318		kstat_io_t kios;
319	+	#endif
320	+	#ifdef LINUX
321	+	FILE *f;
322	+	char *line_ptr;
323	+	int major, minor;
324	+	char dev_letter;
325	+	int has_pp_stats = 1;
326	+	static partition *parts = NULL;
327	+	static int alloc_parts = 0;
328	+	int i, n;
329	+	time_t now;
330	+	#endif
331	+	#ifdef FREEBSD
332	+	static struct statinfo stats;
333	+	static int stats_init = 0;
334	+	int counter;
335	+	struct device_selection *dev_sel = NULL;
336	+	int n_selected, n_selections;
337	+	long sel_gen;
338	+	struct devstat *dev_ptr;
339	+	#endif
340	+	#ifdef NETBSD
341	+	/* FIXME get_diskio_stats NYI on NetBSD.
342	+	* See vmstat/dkstats.c in NetBSD source for examples.
343	+	*/
344	+	#endif
345	+	num_diskio=0;
346
347	+	#ifdef FREEBSD
348	+	if (!stats_init) {
349	+	stats.dinfo=malloc(sizeof(struct devinfo));
350	+	bzero(stats.dinfo, sizeof(struct devinfo));
351	+	if(stats.dinfo==NULL) return NULL;
352	+	stats_init = 1;
353	+	}
354	+	#ifdef FREEBSD5
355	+	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
356	+	/* Not aware of a get all devices, so i said 999. If we ever
357	+	* find a machine with more than 999 disks, then i'll change
358	+	* this number :)
359	+	*/
360	+	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;
361	+	#else
362	+	if ((getdevs(&stats)) < 0) return NULL;
363	+	/* Not aware of a get all devices, so i said 999. If we ever
364	+	* find a machine with more than 999 disks, then i'll change
365	+	* this number :)
366	+	*/
367	+	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;
368	+	#endif
369	+
370	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
371	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
372	+
373	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
374	+	* devices.. like mem, proc.. and also doesn't report floppy
375	+	* drives etc unless they are doing stuff :)
376	+	*/
377	+	#ifdef FREEBSD5
378	+	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
379	+	#else
380	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
381	+	#endif
382	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
383	+	return NULL;
384	+	}
385	+	diskio_stats_ptr=diskio_stats+num_diskio;
386	+
387	+	#ifdef FREEBSD5
388	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
389	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
390	+	#else
391	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
392	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
393	+	#endif
394	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
395	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
396	+	diskio_stats_ptr->systime=time(NULL);
397	+
398	+	num_diskio++;
399	+	}
400	+	free(dev_sel);
401	+
402	+	#endif
403	+	#ifdef SOLARIS
404		if ((kc = kstat_open()) == NULL) {
405		return NULL;
406		}
407
210	–	num_diskio=0;
211	–
408		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
409		if (!strcmp(ksp->ks_class, "disk")) {
410
#	Line 231 | Line 427 | diskio_stat_t *get_diskio_stats(int *entries){
427		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
428
429		diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
430	+	diskio_stats_ptr->systime=time(NULL);
431		num_diskio++;
432		}
433		}
434
435		kstat_close(kc);
436	+	#endif
437
438	+	#ifdef LINUX
439	+	num_diskio = 0;
440	+	n = 0;
441	+
442	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
443	+	have statistics in here too, so we can use those directly. */
444	+
445	+	f = fopen("/proc/partitions", "r");
446	+	if (f == NULL) goto out;
447	+	now = time(NULL);
448	+
449	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
450	+	char name[20];
451	+	char *s;
452	+	long long rsect, wsect;
453	+
454	+	int nr = sscanf(line_ptr,
455	+	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
456	+	&major, &minor, name, &rsect, &wsect);
457	+	if (nr < 3) continue;
458	+	if (nr < 5) {
459	+	has_pp_stats = 0;
460	+	rsect = 0;
461	+	wsect = 0;
462	+	}
463	+
464	+	/* Skip device names ending in numbers, since they're
465	+	partitions. */
466	+	s = name;
467	+	while (*s != '\0') s++;
468	+	--s;
469	+	if (*s >= '0' && *s <= '9') continue;
470	+
471	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
472	+	diskio_stats);
473	+	if (diskio_stats == NULL) goto out;
474	+	if (n >= alloc_parts) {
475	+	alloc_parts += 16;
476	+	parts = realloc(parts, alloc_parts * sizeof *parts);
477	+	if (parts == NULL) {
478	+	alloc_parts = 0;
479	+	goto out;
480	+	}
481	+	}
482	+
483	+	if (diskio_stats[n].disk_name != NULL)
484	+	free(diskio_stats[n].disk_name);
485	+	diskio_stats[n].disk_name = strdup(name);
486	+	diskio_stats[n].read_bytes = rsect * 512;
487	+	diskio_stats[n].write_bytes = wsect * 512;
488	+	diskio_stats[n].systime = now;
489	+	parts[n].major = major;
490	+	parts[n].minor = minor;
491	+
492	+	n++;
493	+	}
494	+
495	+	if (!has_pp_stats) {
496	+	/* This is an older kernel without stats in /proc/partitions.
497	+	Read what we can from /proc/stat instead. */
498	+
499	+	f = fopen("/proc/stat", "r");
500	+	if (f == NULL) goto out;
501	+	now = time(NULL);
502	+
503	+	line_ptr = f_read_line(f, "disk_io:");
504	+	if (line_ptr == NULL) goto out;
505	+
506	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
507	+	long long rsect, wsect;
508	+
509	+	if (*++line_ptr == '\0') break;
510	+
511	+	if((sscanf(line_ptr,
512	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
513	+	&major, &minor, &rsect, &wsect)) != 4) {
514	+	continue;
515	+	}
516	+
517	+	/* Find the corresponding device from earlier.
518	+	Just to add to the fun, "minor" is actually the disk
519	+	number, not the device minor, so we need to figure
520	+	out the real minor number based on the major!
521	+	This list is not exhaustive; if you're running
522	+	an older kernel you probably don't have fancy
523	+	I2O hardware anyway... */
524	+	switch (major) {
525	+	case 3:
526	+	case 21:
527	+	case 22:
528	+	case 33:
529	+	case 34:
530	+	case 36:
531	+	case 56:
532	+	case 57:
533	+	case 88:
534	+	case 89:
535	+	case 90:
536	+	case 91:
537	+	minor *= 64;
538	+	break;
539	+	case 9:
540	+	case 43:
541	+	break;
542	+	default:
543	+	minor *= 16;
544	+	break;
545	+	}
546	+	for (i = 0; i < n; i++) {
547	+	if (major == parts[i].major
548	+	&& minor == parts[i].minor)
549	+	break;
550	+	}
551	+	if (i == n) continue;
552	+
553	+	/* We read the number of blocks. Blocks are stored in
554	+	512 bytes */
555	+	diskio_stats[i].read_bytes = rsect * 512;
556	+	diskio_stats[i].write_bytes = wsect * 512;
557	+	diskio_stats[i].systime = now;
558	+	}
559	+	}
560	+
561	+	num_diskio = n;
562	+	out:
563	+	if (f != NULL) fclose(f);
564	+
565	+	#endif
566		*entries=num_diskio;
567
568		return diskio_stats;
#	Line 303 | Line 629 | diskio_stat_t *get_diskio_stats_diff(int *entries){
629		diskio_stats_diff_ptr++;
630
631		}
632	<
632	>
633	>	*entries=sizeof_diskio_stats_diff;
634		return diskio_stats_diff;
635		}

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