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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 1.1 by pajs, Tue Feb 18 19:28:30 2003 UTC vs.
Revision 1.30 by ats, Sun Oct 19 00:10:30 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	<
33	>	#include <kstat.h>
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 FREEBSD
46	+	#include <sys/param.h>
47	+	#include <sys/ucred.h>
48	+	#include <sys/mount.h>
49	+	#include <sys/dkstat.h>
50	+	#include <devstat.h>
51	+	#define VALID_FS_TYPES {"ufs", "mfs"}
52	+	#endif
53		#define START_VAL 1
54
55		char *copy_string(char *orig_ptr, const char *newtext){
#	Line 61 | Line 74 | void init_disk_stat(int start, int end, disk_stat_t *d
74
75		disk_stats++;
76		}
64	–
77		}
78
79		disk_stat_t *get_disk_stats(int *entries){
#	Line 71 | Line 83 | disk_stat_t *get_disk_stats(int *entries){
83
84		char *fs_types[] = VALID_FS_TYPES;
85		int x, valid_type;
74	–
86		int num_disks=0;
87	<	struct mnttab mp;
77	<	struct statvfs fs;
87	>	#if defined(LINUX) || defined (SOLARIS)
88		FILE *f;
89	+	#endif
90
91		disk_stat_t *disk_ptr;
92
93	+	#ifdef SOLARIS
94	+	struct mnttab mp;
95	+	struct statvfs fs;
96	+	#endif
97	+	#ifdef LINUX
98	+	struct mntent *mp;
99	+	struct statfs fs;
100	+	#endif
101	+	#ifdef FREEBSD
102	+	int nummnt;
103	+	struct statfs *mp;
104	+	#endif
105	+
106		if(watermark==-1){
107		disk_stats=malloc(START_VAL * sizeof(disk_stat_t));
108		if(disk_stats==NULL){
#	Line 87 | Line 111 | disk_stat_t *get_disk_stats(int *entries){
111		watermark=START_VAL;
112		init_disk_stat(0, watermark-1, disk_stats);
113		}
114	+	#ifdef FREEBSD
115	+	nummnt=getmntinfo(&mp , MNT_LOCAL);
116	+	if (nummnt<=0){
117	+	return NULL;
118	+	}
119	+	for(;nummnt--; mp++){
120	+	valid_type=0;
121	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
122	+	if(strcmp(mp->f_fstypename, fs_types[x]) ==0){
123	+	valid_type=1;
124	+	break;
125	+	}
126	+	}
127	+	#endif
128
129	+	#ifdef LINUX
130	+	if ((f=setmntent("/etc/mtab", "r" ))==NULL){
131	+	return NULL;
132	+	}
133
134	+	while((mp=getmntent(f))){
135	+	if((statfs(mp->mnt_dir, &fs)) !=0){
136	+	continue;
137	+	}
138	+
139	+	valid_type=0;
140	+	for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
141	+	if(strcmp(mp->mnt_type, fs_types[x]) ==0){
142	+	valid_type=1;
143	+	break;
144	+	}
145	+	}
146	+	#endif
147	+
148	+	#ifdef SOLARIS
149		if ((f=fopen("/etc/mnttab", "r" ))==NULL){
150		return NULL;
151		}
#	Line 96 | Line 153 | disk_stat_t *get_disk_stats(int *entries){
153		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
154		continue;
155		}
99	–
156		valid_type=0;
157		for(x=0;x<((sizeof(fs_types))/(sizeof(char*)));x++){
158		if(strcmp(mp.mnt_fstype, fs_types[x]) ==0){
#	Line 104 | Line 160 | disk_stat_t *get_disk_stats(int *entries){
160		break;
161		}
162		}
163	+	#endif
164
165		if(valid_type){
166		if(num_disks>watermark-1){
#	Line 118 | Line 175 | disk_stat_t *get_disk_stats(int *entries){
175		}
176
177		disk_ptr=disk_stats+num_disks;
178	<
178	>	#ifdef FREEBSD
179	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->f_mntfromname))==NULL){
180	>	return NULL;
181	>	}
182	>
183	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->f_fstypename))==NULL){
184	>	return NULL;
185	>	}
186	>
187	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->f_mntonname))==NULL){
188	>	return NULL;
189	>	}
190	>
191	>	disk_ptr->size = (long long)mp->f_bsize * (long long) mp->f_blocks;
192	>	disk_ptr->avail = (long long)mp->f_bsize * (long long) mp->f_bavail;
193	>	disk_ptr->used = (disk_ptr->size) - ((long long)mp->f_bsize * (long long)mp->f_bfree);
194	>
195	>	disk_ptr->total_inodes=(long long)mp->f_files;
196	>	disk_ptr->free_inodes=(long long)mp->f_ffree;
197	>	/* Freebsd doesn't have a "available" inodes */
198	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
199	>	#endif
200	>	#ifdef LINUX
201	>	if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp->mnt_fsname))==NULL){
202	>	return NULL;
203	>	}
204	>
205	>	if((disk_ptr->fs_type=copy_string(disk_ptr->fs_type, mp->mnt_type))==NULL){
206	>	return NULL;
207	>	}
208	>
209	>	if((disk_ptr->mnt_point=copy_string(disk_ptr->mnt_point, mp->mnt_dir))==NULL){
210	>	return NULL;
211	>	}
212	>	disk_ptr->size = (long long)fs.f_bsize * (long long)fs.f_blocks;
213	>	disk_ptr->avail = (long long)fs.f_bsize * (long long)fs.f_bavail;
214	>	disk_ptr->used = (disk_ptr->size) - ((long long)fs.f_bsize * (long long)fs.f_bfree);
215	>
216	>	disk_ptr->total_inodes=(long long)fs.f_files;
217	>	disk_ptr->free_inodes=(long long)fs.f_ffree;
218	>	/* Linux doesn't have a "available" inodes */
219	>	disk_ptr->used_inodes=disk_ptr->total_inodes-disk_ptr->free_inodes;
220	>	#endif
221	>
222	>	#ifdef SOLARIS
223		/* Memory leak in event of realloc failing */
224		/* Maybe make this char[bigenough] and do strncpy's and put a null in the end?
225	<	Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE woul prob be upwards
226	<	of a k each */
225	>	* Downside is its a bit hungry for a lot of mounts, as MNT_MAX_SIZE would prob
226	>	* be upwards of a k each
227	>	*/
228		if((disk_ptr->device_name=copy_string(disk_ptr->device_name, mp.mnt_special))==NULL){
229		return NULL;
230		}
#	Line 142 | Line 244 | disk_stat_t *get_disk_stats(int *entries){
244		disk_ptr->total_inodes=(long long)fs.f_files;
245		disk_ptr->used_inodes=disk_ptr->total_inodes - (long long)fs.f_ffree;
246		disk_ptr->free_inodes=(long long)fs.f_favail;
247	<
247	>	#endif
248		num_disks++;
249		}
250		}
#	Line 150 | Line 252 | disk_stat_t *get_disk_stats(int *entries){
252		*entries=num_disks;
253
254		/* If this fails, there is very little i can do about it, so i'll ignore it :) */
255	+	#if defined(LINUX) || defined(SOLARIS)
256		fclose(f);
257	+	#endif
258
259		return disk_stats;
260
261	+	}
262	+	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
263	+
264	+	for(diskio_stats+=start; start<end; start++){
265	+	diskio_stats->disk_name=NULL;
266	+
267	+	diskio_stats++;
268	+	}
269	+	}
270	+
271	+	diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
272	+
273	+	if(diskio_stats==NULL){
274	+
275	+	if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
276	+	return NULL;
277	+	}
278	+	diskio_stat_init(0, needed_entries, diskio_stats);
279	+	*cur_entries=needed_entries;
280	+
281	+	return diskio_stats;
282	+	}
283	+
284	+
285	+	if(*cur_entries<needed_entries){
286	+	diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
287	+	if(diskio_stats==NULL){
288	+	return NULL;
289	+	}
290	+	diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
291	+	*cur_entries=needed_entries;
292	+	}
293	+
294	+	return diskio_stats;
295	+	}
296	+
297	+	static diskio_stat_t *diskio_stats=NULL;
298	+	static int num_diskio=0;
299	+
300	+	#ifdef LINUX
301	+	typedef struct {
302	+	int major;
303	+	int minor;
304	+	} partition;
305	+	#endif
306	+
307	+	diskio_stat_t *get_diskio_stats(int *entries){
308	+
309	+	static int sizeof_diskio_stats=0;
310	+	diskio_stat_t *diskio_stats_ptr;
311	+
312	+	#ifdef SOLARIS
313	+	kstat_ctl_t *kc;
314	+	kstat_t *ksp;
315	+	kstat_io_t kios;
316	+	#endif
317	+	#ifdef LINUX
318	+	FILE *f;
319	+	char *line_ptr;
320	+	int major, minor;
321	+	char dev_letter;
322	+	int has_pp_stats = 1;
323	+	static partition *parts = NULL;
324	+	static int alloc_parts = 0;
325	+	int i, n;
326	+	time_t now;
327	+	#endif
328	+	#ifdef FREEBSD
329	+	static struct statinfo stats;
330	+	static int stats_init = 0;
331	+	int counter;
332	+	struct device_selection *dev_sel = NULL;
333	+	int n_selected, n_selections;
334	+	long sel_gen;
335	+	struct devstat *dev_ptr;
336	+	#endif
337	+	num_diskio=0;
338	+
339	+	#ifdef FREEBSD
340	+	if (!stats_init) {
341	+	stats.dinfo=malloc(sizeof(struct devinfo));
342	+	bzero(stats.dinfo, sizeof(struct devinfo));
343	+	if(stats.dinfo==NULL) return NULL;
344	+	stats_init = 1;
345	+	}
346	+	#ifdef FREEBSD5
347	+	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
348	+	/* Not aware of a get all devices, so i said 999. If we ever
349	+	* find a machine with more than 999 disks, then i'll change
350	+	* this number :)
351	+	*/
352	+	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;
353	+	#else
354	+	if ((getdevs(&stats)) < 0) return NULL;
355	+	/* Not aware of a get all devices, so i said 999. If we ever
356	+	* find a machine with more than 999 disks, then i'll change
357	+	* this number :)
358	+	*/
359	+	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;
360	+	#endif
361	+
362	+	for(counter=0;counter<stats.dinfo->numdevs;counter++){
363	+	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
364	+
365	+	/* Throw away devices that have done nothing, ever.. Eg "odd"
366	+	* devices.. like mem, proc.. and also doesn't report floppy
367	+	* drives etc unless they are doing stuff :)
368	+	*/
369	+	#ifdef FREEBSD5
370	+	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
371	+	#else
372	+	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
373	+	#endif
374	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
375	+	return NULL;
376	+	}
377	+	diskio_stats_ptr=diskio_stats+num_diskio;
378	+
379	+	#ifdef FREEBSD5
380	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
381	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
382	+	#else
383	+	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
384	+	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
385	+	#endif
386	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
387	+	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
388	+	diskio_stats_ptr->systime=time(NULL);
389	+
390	+	num_diskio++;
391	+	}
392	+	free(dev_sel);
393	+
394	+	#endif
395	+	#ifdef SOLARIS
396	+	if ((kc = kstat_open()) == NULL) {
397	+	return NULL;
398	+	}
399	+
400	+	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
401	+	if (!strcmp(ksp->ks_class, "disk")) {
402	+
403	+	if(ksp->ks_type != KSTAT_TYPE_IO) continue;
404	+	/* We dont want metadevices appearins as num_diskio */
405	+	if(strcmp(ksp->ks_module, "md")==0) continue;
406	+	if((kstat_read(kc, ksp, &kios))==-1){
407	+	}
408	+
409	+	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
410	+	kstat_close(kc);
411	+	return NULL;
412	+	}
413	+	diskio_stats_ptr=diskio_stats+num_diskio;
414	+
415	+	diskio_stats_ptr->read_bytes=kios.nread;
416	+
417	+	diskio_stats_ptr->write_bytes=kios.nwritten;
418	+
419	+	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
420	+
421	+	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
422	+	diskio_stats_ptr->systime=time(NULL);
423	+	num_diskio++;
424	+	}
425	+	}
426	+
427	+	kstat_close(kc);
428	+	#endif
429	+
430	+	#ifdef LINUX
431	+	num_diskio = 0;
432	+	n = 0;
433	+
434	+	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
435	+	have statistics in here too, so we can use those directly. */
436	+
437	+	f = fopen("/proc/partitions", "r");
438	+	if (f == NULL) goto out;
439	+	now = time(NULL);
440	+
441	+	while ((line_ptr = f_read_line(f, "")) != NULL) {
442	+	char name[20];
443	+	char *s;
444	+	long long rsect, wsect;
445	+
446	+	int nr = sscanf(line_ptr,
447	+	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
448	+	&major, &minor, name, &rsect, &wsect);
449	+	if (nr < 3) continue;
450	+	if (nr < 5) {
451	+	has_pp_stats = 0;
452	+	rsect = 0;
453	+	wsect = 0;
454	+	}
455	+
456	+	/* Skip device names ending in numbers, since they're
457	+	partitions. */
458	+	s = name;
459	+	while (*s != '\0') s++;
460	+	--s;
461	+	if (*s >= '0' && *s <= '9') continue;
462	+
463	+	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
464	+	diskio_stats);
465	+	if (diskio_stats == NULL) goto out;
466	+	if (n >= alloc_parts) {
467	+	alloc_parts += 16;
468	+	parts = realloc(parts, alloc_parts * sizeof *parts);
469	+	if (parts == NULL) {
470	+	alloc_parts = 0;
471	+	goto out;
472	+	}
473	+	}
474	+
475	+	if (diskio_stats[n].disk_name != NULL)
476	+	free(diskio_stats[n].disk_name);
477	+	diskio_stats[n].disk_name = strdup(name);
478	+	diskio_stats[n].read_bytes = rsect * 512;
479	+	diskio_stats[n].write_bytes = wsect * 512;
480	+	diskio_stats[n].systime = now;
481	+	parts[n].major = major;
482	+	parts[n].minor = minor;
483	+
484	+	n++;
485	+	}
486	+
487	+	if (!has_pp_stats) {
488	+	/* This is an older kernel without stats in /proc/partitions.
489	+	Read what we can from /proc/stat instead. */
490	+
491	+	f = fopen("/proc/stat", "r");
492	+	if (f == NULL) goto out;
493	+	now = time(NULL);
494	+
495	+	line_ptr = f_read_line(f, "disk_io:");
496	+	if (line_ptr == NULL) goto out;
497	+
498	+	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
499	+	long long rsect, wsect;
500	+
501	+	if (*++line_ptr == '\0') break;
502	+
503	+	if((sscanf(line_ptr,
504	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
505	+	&major, &minor, &rsect, &wsect)) != 4) {
506	+	continue;
507	+	}
508	+
509	+	/* Find the corresponding device from earlier.
510	+	Just to add to the fun, "minor" is actually the disk
511	+	number, not the device minor, so we need to figure
512	+	out the real minor number based on the major!
513	+	This list is not exhaustive; if you're running
514	+	an older kernel you probably don't have fancy
515	+	I2O hardware anyway... */
516	+	switch (major) {
517	+	case 3:
518	+	case 21:
519	+	case 22:
520	+	case 33:
521	+	case 34:
522	+	case 36:
523	+	case 56:
524	+	case 57:
525	+	case 88:
526	+	case 89:
527	+	case 90:
528	+	case 91:
529	+	minor *= 64;
530	+	break;
531	+	case 9:
532	+	case 43:
533	+	break;
534	+	default:
535	+	minor *= 16;
536	+	break;
537	+	}
538	+	for (i = 0; i < n; i++) {
539	+	if (major == parts[i].major
540	+	&& minor == parts[i].minor)
541	+	break;
542	+	}
543	+	if (i == n) continue;
544	+
545	+	/* We read the number of blocks. Blocks are stored in
546	+	512 bytes */
547	+	diskio_stats[i].read_bytes = rsect * 512;
548	+	diskio_stats[i].write_bytes = wsect * 512;
549	+	diskio_stats[i].systime = now;
550	+	}
551	+	}
552	+
553	+	num_diskio = n;
554	+	out:
555	+	if (f != NULL) fclose(f);
556	+
557	+	#endif
558	+	*entries=num_diskio;
559	+
560	+	return diskio_stats;
561	+	}
562	+
563	+	diskio_stat_t *get_diskio_stats_diff(int *entries){
564	+	static diskio_stat_t *diskio_stats_diff=NULL;
565	+	static int sizeof_diskio_stats_diff=0;
566	+	diskio_stat_t *diskio_stats_diff_ptr, *diskio_stats_ptr;
567	+	int disks, x, y;
568	+
569	+	if(diskio_stats==NULL){
570	+	diskio_stats_ptr=get_diskio_stats(&disks);
571	+	*entries=disks;
572	+	return diskio_stats_ptr;
573	+	}
574	+
575	+	diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
576	+	if(diskio_stats_diff==NULL){
577	+	return NULL;
578	+	}
579	+
580	+	diskio_stats_diff_ptr=diskio_stats_diff;
581	+	diskio_stats_ptr=diskio_stats;
582	+
583	+	for(disks=0;disks<num_diskio;disks++){
584	+	if(diskio_stats_diff_ptr->disk_name!=NULL){
585	+	free(diskio_stats_diff_ptr->disk_name);
586	+	}
587	+	diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
588	+	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
589	+	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
590	+	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;
591	+
592	+	diskio_stats_diff_ptr++;
593	+	diskio_stats_ptr++;
594	+	}
595	+
596	+	diskio_stats_ptr=get_diskio_stats(&disks);
597	+	diskio_stats_diff_ptr=diskio_stats_diff;
598	+
599	+	for(x=0;x<sizeof_diskio_stats_diff;x++){
600	+
601	+	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
602	+	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
603	+	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
604	+	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
605	+	}else{
606	+	diskio_stats_ptr=diskio_stats;
607	+	for(y=0;y<disks;y++){
608	+	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
609	+	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
610	+	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
611	+	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
612	+
613	+	break;
614	+	}
615	+
616	+	diskio_stats_ptr++;
617	+	}
618	+	}
619	+
620	+	diskio_stats_ptr++;
621	+	diskio_stats_diff_ptr++;
622	+
623	+	}
624	+
625	+	*entries=sizeof_diskio_stats_diff;
626	+	return diskio_stats_diff;
627		}

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