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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 1.3 by tdb, Thu Feb 20 13:19:52 2003 UTC vs.
Revision 1.28 by pajs, Thu Oct 9 15:22:59 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 <stdlib.h>
27		#include <string.h>
28	+	#include "statgrab.h"
29
30		#ifdef SOLARIS
31		#include <sys/mnttab.h>
32	–	#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 <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 60 | Line 73 | void init_disk_stat(int start, int end, disk_stat_t *d
73
74		disk_stats++;
75		}
63	–
76		}
77
78		disk_stat_t *get_disk_stats(int *entries){
#	Line 70 | Line 82 | disk_stat_t *get_disk_stats(int *entries){
82
83		char *fs_types[] = VALID_FS_TYPES;
84		int x, valid_type;
73	–
85		int num_disks=0;
86	<	struct mnttab mp;
76	<	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 86 | 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 95 | Line 152 | disk_stat_t *get_disk_stats(int *entries){
152		if ((statvfs(mp.mnt_mountp, &fs)) !=0){
153		continue;
154		}
98	–
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 103 | 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 117 | 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 141 | 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 149 | 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		}
261	+	void diskio_stat_init(int start, int end, diskio_stat_t *diskio_stats){
262
263	+	for(diskio_stats+=start; start<end; start++){
264	+	diskio_stats->disk_name=NULL;
265	+
266	+	diskio_stats++;
267	+	}
268	+	}
269	+
270	+	diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
271	+
272	+	if(diskio_stats==NULL){
273	+
274	+	if((diskio_stats=malloc(needed_entries * sizeof(diskio_stat_t)))==NULL){
275	+	return NULL;
276	+	}
277	+	diskio_stat_init(0, needed_entries, diskio_stats);
278	+	*cur_entries=needed_entries;
279	+
280	+	return diskio_stats;
281	+	}
282	+
283	+
284	+	if(*cur_entries<needed_entries){
285	+	diskio_stats=realloc(diskio_stats, (sizeof(diskio_stat_t)*needed_entries));
286	+	if(diskio_stats==NULL){
287	+	return NULL;
288	+	}
289	+	diskio_stat_init(*cur_entries, needed_entries, diskio_stats);
290	+	*cur_entries=needed_entries;
291	+	}
292	+
293	+	return diskio_stats;
294	+	}
295	+
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	<	/* Do jibble */
309	<	return NULL;
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	>	bzero(stats.dinfo, sizeof(struct devinfo));
342	>	if(stats.dinfo==NULL) return NULL;
343	>	stats_init = 1;
344	>	}
345	>	#ifdef FREEBSD5
346	>	if ((devstat_getdevs(NULL, &stats)) < 0) return NULL;
347	>	/* Not aware of a get all devices, so i said 999. If we ever                                                                           * find a machine with more than 999 disks, then i'll change                                                                           * this number :)                                                                                                                      */
348	>	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;
349	>	#else
350	>	if ((getdevs(&stats)) < 0) return NULL;
351	>	/* Not aware of a get all devices, so i said 999. If we ever
352	>	* find a machine with more than 999 disks, then i'll change
353	>	* this number :)
354	>	*/
355	>	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;
356	>	#endif
357	>
358	>	for(counter=0;counter<stats.dinfo->numdevs;counter++){
359	>	dev_ptr=&stats.dinfo->devices[dev_sel[counter].position];
360	>
361	>	/* Throw away devices that have done nothing, ever.. Eg "odd"
362	>	* devices.. like mem, proc.. and also doesn't report floppy
363	>	* drives etc unless they are doing stuff :)
364	>	*/
365	>	#ifdef FREEBSD5
366	>	if((dev_ptr->bytes[DEVSTAT_READ]==0) && (dev_ptr->bytes[DEVSTAT_WRITE]==0)) continue;
367	>	#else
368	>	if((dev_ptr->bytes_read==0) && (dev_ptr->bytes_written==0)) continue;
369	>	#endif
370	>	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
371	>	return NULL;
372	>	}
373	>	diskio_stats_ptr=diskio_stats+num_diskio;
374	>
375	>	#ifdef FREEBSD5
376	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes[DEVSTAT_READ];
377	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes[DEVSTAT_WRITE];
378	>	#else
379	>	diskio_stats_ptr->read_bytes=dev_ptr->bytes_read;
380	>	diskio_stats_ptr->write_bytes=dev_ptr->bytes_written;
381	>	#endif
382	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
383	>	asprintf((&diskio_stats_ptr->disk_name), "%s%d", dev_ptr->device_name, dev_ptr->unit_number);
384	>	diskio_stats_ptr->systime=time(NULL);
385	>
386	>	num_diskio++;
387	>	}
388	>	free(dev_sel);
389	>
390	>	#endif
391	>	#ifdef SOLARIS
392	>	if ((kc = kstat_open()) == NULL) {
393	>	return NULL;
394	>	}
395	>
396	>	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
397	>	if (!strcmp(ksp->ks_class, "disk")) {
398	>
399	>	if(ksp->ks_type != KSTAT_TYPE_IO) continue;
400	>	/* We dont want metadevices appearins as num_diskio */
401	>	if(strcmp(ksp->ks_module, "md")==0) continue;
402	>	if((kstat_read(kc, ksp, &kios))==-1){
403	>	}
404	>
405	>	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
406	>	kstat_close(kc);
407	>	return NULL;
408	>	}
409	>	diskio_stats_ptr=diskio_stats+num_diskio;
410	>
411	>	diskio_stats_ptr->read_bytes=kios.nread;
412	>
413	>	diskio_stats_ptr->write_bytes=kios.nwritten;
414	>
415	>	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
416	>
417	>	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
418	>	diskio_stats_ptr->systime=time(NULL);
419	>	num_diskio++;
420	>	}
421	>	}
422	>
423	>	kstat_close(kc);
424	>	#endif
425	>
426	>	#ifdef LINUX
427	>	num_diskio = 0;
428	>	n = 0;
429	>
430	>	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
431	>	have statistics in here too, so we can use those directly. */
432	>
433	>	f = fopen("/proc/partitions", "r");
434	>	if (f == NULL) goto out;
435	>	now = time(NULL);
436	>
437	>	while ((line_ptr = f_read_line(f, "")) != NULL) {
438	>	char name[20];
439	>	char *s;
440	>	long long rsect, wsect;
441	>
442	>	int nr = sscanf(line_ptr,
443	>	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
444	>	&major, &minor, name, &rsect, &wsect);
445	>	if (nr < 3) continue;
446	>	if (nr < 5) {
447	>	has_pp_stats = 0;
448	>	rsect = 0;
449	>	wsect = 0;
450	>	}
451	>
452	>	/* Skip device names ending in numbers, since they're
453	>	partitions. */
454	>	s = name;
455	>	while (*s != '\0') s++;
456	>	--s;
457	>	if (*s >= '0' && *s <= '9') continue;
458	>
459	>	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
460	>	diskio_stats);
461	>	if (diskio_stats == NULL) goto out;
462	>	if (n >= alloc_parts) {
463	>	alloc_parts += 16;
464	>	parts = realloc(parts, alloc_parts * sizeof *parts);
465	>	if (parts == NULL) {
466	>	alloc_parts = 0;
467	>	goto out;
468	>	}
469	>	}
470	>
471	>	if (diskio_stats[n].disk_name != NULL)
472	>	free(diskio_stats[n].disk_name);
473	>	diskio_stats[n].disk_name = strdup(name);
474	>	diskio_stats[n].read_bytes = rsect * 512;
475	>	diskio_stats[n].write_bytes = wsect * 512;
476	>	diskio_stats[n].systime = now;
477	>	parts[n].major = major;
478	>	parts[n].minor = minor;
479	>
480	>	n++;
481	>	}
482	>
483	>	if (!has_pp_stats) {
484	>	/* This is an older kernel without stats in /proc/partitions.
485	>	Read what we can from /proc/stat instead. */
486	>
487	>	f = fopen("/proc/stat", "r");
488	>	if (f == NULL) goto out;
489	>	now = time(NULL);
490	>
491	>	line_ptr = f_read_line(f, "disk_io:");
492	>	if (line_ptr == NULL) goto out;
493	>
494	>	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
495	>	long long rsect, wsect;
496	>
497	>	if (*++line_ptr == '\0') break;
498	>
499	>	if((sscanf(line_ptr,
500	>	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
501	>	&major, &minor, &rsect, &wsect)) != 4) {
502	>	continue;
503	>	}
504	>
505	>	/* Find the corresponding device from earlier.
506	>	Just to add to the fun, "minor" is actually the disk
507	>	number, not the device minor, so we need to figure
508	>	out the real minor number based on the major!
509	>	This list is not exhaustive; if you're running
510	>	an older kernel you probably don't have fancy
511	>	I2O hardware anyway... */
512	>	switch (major) {
513	>	case 3:
514	>	case 21:
515	>	case 22:
516	>	case 33:
517	>	case 34:
518	>	case 36:
519	>	case 56:
520	>	case 57:
521	>	case 88:
522	>	case 89:
523	>	case 90:
524	>	case 91:
525	>	minor *= 64;
526	>	break;
527	>	case 9:
528	>	case 43:
529	>	break;
530	>	default:
531	>	minor *= 16;
532	>	break;
533	>	}
534	>	for (i = 0; i < n; i++) {
535	>	if (major == parts[i].major
536	>	&& minor == parts[i].minor)
537	>	break;
538	>	}
539	>	if (i == n) continue;
540	>
541	>	/* We read the number of blocks. Blocks are stored in
542	>	512 bytes */
543	>	diskio_stats[i].read_bytes = rsect * 512;
544	>	diskio_stats[i].write_bytes = wsect * 512;
545	>	diskio_stats[i].systime = now;
546	>	}
547	>	}
548	>
549	>	num_diskio = n;
550	>	out:
551	>	if (f != NULL) fclose(f);
552	>
553	>	#endif
554	>	*entries=num_diskio;
555	>
556	>	return diskio_stats;
557	>	}
558	>
559	>	diskio_stat_t *get_diskio_stats_diff(int *entries){
560	>	static diskio_stat_t *diskio_stats_diff=NULL;
561	>	static int sizeof_diskio_stats_diff=0;
562	>	diskio_stat_t *diskio_stats_diff_ptr, *diskio_stats_ptr;
563	>	int disks, x, y;
564	>
565	>	if(diskio_stats==NULL){
566	>	diskio_stats_ptr=get_diskio_stats(&disks);
567	>	*entries=disks;
568	>	return diskio_stats_ptr;
569	>	}
570	>
571	>	diskio_stats_diff=diskio_stat_malloc(num_diskio, &sizeof_diskio_stats_diff, diskio_stats_diff);
572	>	if(diskio_stats_diff==NULL){
573	>	return NULL;
574	>	}
575	>
576	>	diskio_stats_diff_ptr=diskio_stats_diff;
577	>	diskio_stats_ptr=diskio_stats;
578	>
579	>	for(disks=0;disks<num_diskio;disks++){
580	>	if(diskio_stats_diff_ptr->disk_name!=NULL){
581	>	free(diskio_stats_diff_ptr->disk_name);
582	>	}
583	>	diskio_stats_diff_ptr->disk_name=strdup(diskio_stats_ptr->disk_name);
584	>	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes;
585	>	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes;
586	>	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime;
587	>
588	>	diskio_stats_diff_ptr++;
589	>	diskio_stats_ptr++;
590	>	}
591	>
592	>	diskio_stats_ptr=get_diskio_stats(&disks);
593	>	diskio_stats_diff_ptr=diskio_stats_diff;
594	>
595	>	for(x=0;x<sizeof_diskio_stats_diff;x++){
596	>
597	>	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
598	>	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
599	>	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
600	>	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
601	>	}else{
602	>	diskio_stats_ptr=diskio_stats;
603	>	for(y=0;y<disks;y++){
604	>	if((strcmp(diskio_stats_diff_ptr->disk_name, diskio_stats_ptr->disk_name))==0){
605	>	diskio_stats_diff_ptr->read_bytes=diskio_stats_ptr->read_bytes-diskio_stats_diff_ptr->read_bytes;
606	>	diskio_stats_diff_ptr->write_bytes=diskio_stats_ptr->write_bytes-diskio_stats_diff_ptr->write_bytes;
607	>	diskio_stats_diff_ptr->systime=diskio_stats_ptr->systime-diskio_stats_diff_ptr->systime;
608	>
609	>	break;
610	>	}
611	>
612	>	diskio_stats_ptr++;
613	>	}
614	>	}
615	>
616	>	diskio_stats_ptr++;
617	>	diskio_stats_diff_ptr++;
618	>
619	>	}
620	>
621	>	*entries=sizeof_diskio_stats_diff;
622	>	return diskio_stats_diff;
623		}

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