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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 1.21 by ats, Tue Sep 9 08:43:33 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 <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 67 | Line 82 | disk_stat_t *get_disk_stats(int *entries){
82
83		char *fs_types[] = VALID_FS_TYPES;
84		int x, valid_type;
70	–
85		int num_disks=0;
86	<	struct mnttab mp;
73	<	struct statvfs fs;
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;
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));
107		if(disk_stats==NULL){
#	Line 83 | 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;
131	+	}
132
133	+	while((mp=getmntent(f))){
134	+	if((statfs(mp->mnt_dir, &fs)) !=0){
135	+	continue;
136	+	}
137	+
138	+	valid_type=0;
139	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
140	+	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
141	+	valid_type=1;
142	+	break;
143	+	}
144	+	}
145	+	#endif
146	+
147	+	#ifdef SOLARIS
148		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
149		return NULL;
150		}
#	Line 92 | Line 152 | disk_stat_t *get_disk_stats(int *entries){
152		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
153		continue;
154		}
95	–
155		valid_type=0;
156		for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
157		if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
#	Line 100 | Line 159 | disk_stat_t *get_disk_stats(int *entries){
159		break;
160		}
161		}
162	+	#endif
163
164		if(valid_type){
165		if(num_disks>watermark-1){
#	Line 114 | Line 174 | disk_stat_t *get_disk_stats(int *entries){
174		}
175
176		disk_ptr=disk_stats+num_disks;
177	<
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;
202	>	}
203	>
204	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
205	>	return NULL;
206	>	}
207	>
208	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
209	>	return NULL;
210	>	}
211	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
212	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
213	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
214	>
215	>	disk_ptr->total_inodes=(long long)fs.f_files;
216	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
217	>	/* Linux doesn't have a "available" inodes */
218	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
219	>	#endif
220	>
221	>	#ifdef SOLARIS
222		/* Memory leak in event of realloc failing */
223		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
224	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
225	<	of a k each */
224	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
225	>	* be upwards of a k each
226	>	*/
227		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
228		return NULL;
229		}
#	Line 138 | Line 243 | disk_stat_t *get_disk_stats(int *entries){
243		disk_ptr->total_inodes=(long long)fs.f_files;
244		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
245		disk_ptr->free_inodes=(long long)fs.f_favail;
246	<
246	>	#endif
247		num_disks++;
248		}
249		}
#	Line 146 | 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		}
154	–
261		void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
262
263		for(diskio_stats+=start; start<end; start++){
#	Line 190 | 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	+	static struct statinfo stats;
329	+	static int stats_init = 0;
330	+	int counter;
331	+	struct device_selection *dev_sel = NULL;
332	+	int n_selected, n_selections;
333	+	long sel_gen;
334	+	struct devstat *dev_ptr;
335	+	#endif
336	+	num_diskio=0;
337
338	+	#ifdef FREEBSD
339	+	if (!stats_init) {
340	+	stats.dinfo=malloc(sizeof(struct devinfo));
341	+	if(stats.dinfo==NULL) return NULL;
342	+	stats_init = 1;
343	+	}
344	+	if ((getdevs(&stats)) < 0) return NULL;
345	+	/* Not aware of a get all devices, so i said 999. If we ever
346	+	* find a machine with more than 999 disks, then i'll change
347	+	* this number :)
348	+	*/
349	+	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;
350	+
351	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
352	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
353	+
354	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
355	+	* devices.. like mem, proc.. and also doesn't report floppy
356	+	* drives etc unless they are doing stuff :)
357	+	*/
358	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
359	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
360	+	return NULL;
361	+	}
362	+	diskio_stats_ptr=diskio_stats+num_diskio;
363	+
364	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
365	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
366	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
367	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
368	+	diskio_stats_ptr->systime=time(NULL);
369	+
370	+	num_diskio++;
371	+	}
372	+	free(dev_sel);
373	+	free(stats.dinfo);
374	+
375	+	#endif
376	+	#ifdef SOLARIS
377		if ((kc = kstat_open()) == NULL) {
378		return NULL;
379		}
380
206	–	num_diskio=0;
207	–
381		for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
382		if (!strcmp(ksp->ks_class, "disk")) {
383
#	Line 227 | Line 400 | diskio_stat_t *get_diskio_stats(int *entries){
400		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
401
402		diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
403	+	diskio_stats_ptr->systime=time(NULL);
404		num_diskio++;
405		}
406		}
407
408		kstat_close(kc);
409	+	#endif
410
411	+	#ifdef LINUX
412	+	num_diskio = 0;
413	+	n = 0;
414	+
415	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
416	+	have statistics in here too, so we can use those directly. */
417	+
418	+	f = fopen("/proc/partitions", "r");
419	+	if (f == NULL) goto out;
420	+	now = time(NULL);
421	+
422	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
423	+	char name[20];
424	+	char *s;
425	+	long long rsect, wsect;
426	+
427	+	int nr = sscanf(line_ptr,
428	+	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
429	+	&major, &minor, name, &rsect, &wsect);
430	+	if (nr < 3) continue;
431	+	if (nr < 5) {
432	+	has_pp_stats = 0;
433	+	rsect = 0;
434	+	wsect = 0;
435	+	}
436	+
437	+	/* Skip device names ending in numbers, since they're
438	+	partitions. */
439	+	s = name;
440	+	while (*s != '\0') s++;
441	+	--s;
442	+	if (*s >= '0' && *s <= '9') continue;
443	+
444	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
445	+	diskio_stats);
446	+	if (diskio_stats == NULL) goto out;
447	+	if (n >= alloc_parts) {
448	+	alloc_parts += 16;
449	+	parts = realloc(parts, alloc_parts * sizeof *parts);
450	+	if (parts == NULL) {
451	+	alloc_parts = 0;
452	+	goto out;
453	+	}
454	+	}
455	+
456	+	if (diskio_stats[n].disk_name != NULL)
457	+	free(diskio_stats[n].disk_name);
458	+	diskio_stats[n].disk_name = strdup(name);
459	+	diskio_stats[n].read_bytes = rsect * 512;
460	+	diskio_stats[n].write_bytes = wsect * 512;
461	+	diskio_stats[n].systime = now;
462	+	parts[n].major = major;
463	+	parts[n].minor = minor;
464	+
465	+	n++;
466	+	}
467	+
468	+	if (!has_pp_stats) {
469	+	/* This is an older kernel without stats in /proc/partitions.
470	+	Read what we can from /proc/stat instead. */
471	+
472	+	f = fopen("/proc/stat", "r");
473	+	if (f == NULL) goto out;
474	+	now = time(NULL);
475	+
476	+	line_ptr = f_read_line(f, "disk_io:");
477	+	if (line_ptr == NULL) goto out;
478	+
479	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
480	+	long long rsect, wsect;
481	+
482	+	if (*++line_ptr == '\0') break;
483	+
484	+	if((sscanf(line_ptr,
485	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
486	+	&major, &minor, &rsect, &wsect)) != 4) {
487	+	continue;
488	+	}
489	+
490	+	/* Find the corresponding device from earlier.
491	+	Just to add to the fun, "minor" is actually the disk
492	+	number, not the device minor, so we need to figure
493	+	out the real minor number based on the major!
494	+	This list is not exhaustive; if you're running
495	+	an older kernel you probably don't have fancy
496	+	I2O hardware anyway... */
497	+	switch (major) {
498	+	case 3:
499	+	case 21:
500	+	case 22:
501	+	case 33:
502	+	case 34:
503	+	case 36:
504	+	case 56:
505	+	case 57:
506	+	case 88:
507	+	case 89:
508	+	case 90:
509	+	case 91:
510	+	minor *= 64;
511	+	break;
512	+	case 9:
513	+	case 43:
514	+	break;
515	+	default:
516	+	minor *= 16;
517	+	break;
518	+	}
519	+	for (i = 0; i < n; i++) {
520	+	if (major == parts[i].major
521	+	&& minor == parts[i].minor)
522	+	break;
523	+	}
524	+	if (i == n) continue;
525	+
526	+	/* We read the number of blocks. Blocks are stored in
527	+	512 bytes */
528	+	diskio_stats[i].read_bytes = rsect * 512;
529	+	diskio_stats[i].write_bytes = wsect * 512;
530	+	diskio_stats[i].systime = now;
531	+	}
532	+	}
533	+
534	+	num_diskio = n;
535	+	out:
536	+	if (f != NULL) fclose(f);
537	+
538	+	#endif
539		*entries=num_diskio;
540
541		return diskio_stats;
#	Line 299 | Line 602 | diskio_stat_t *get_diskio_stats_diff(int *entries){
602		diskio_stats_diff_ptr++;
603
604		}
605	<
605	>
606	>	*entries=sizeof_diskio_stats_diff;
607		return diskio_stats_diff;
608		}

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