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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 1.19 by ats, Thu Aug 28 21:33:42 2003 UTC vs.
Revision 1.25 by tdb, Tue Oct 7 20:32:50 2003 UTC

#	Line 31 | Line 31
31		#include <sys/mnttab.h>
32		#include <sys/statvfs.h>
33		#include <kstat.h>
34	+	#include <sys/types.h>
35	+	#include <dirent.h>
36	+	#include <limits.h>
37	+	#include <unistd.h>
38		#define VALID_FS_TYPES {"ufs", "tmpfs"}
39		#endif
40
#	Line 51 | Line 55
55		#endif
56		#define START_VAL 1
57
58	+	/* Solaris kernel stores the disk names in the old BSD format
59	+	* and we would prefer it in th modern format.
60	+	*/
61	+	#ifdef SOLARIS
62	+	/* Lines from the path_to_inst file */
63	+	typedef struct {
64	+	/* unlikely to get a line that long */
65	+	char line[256];
66	+	}file_line_t;
67	+
68	+	/* Linked list of the mappings from the older bsd-based sunos names
69	+	* to the modern solaris names
70	+	*/
71	+	struct disk_mapping_ent_t{
72	+	char *sunos_name;
73	+	char *solaris_name;
74	+	struct disk_mapping_ent_t *next;
75	+	};
76	+	typedef struct disk_mapping_ent_t disk_mapping_t;
77	+	#endif
78	+
79		char *copy_string(char *orig_ptr, const char *newtext){
80
81		/* Maybe free if not NULL, and strdup rather than realloc and strcpy? */
#	Line 267 | Line 292 | void diskio_stat_init(int start, int end, diskio_stat_
292		}
293		}
294
295	+	#ifdef SOLARIS
296	+	char *drive_map(char *sunos_name){
297	+	file_line_t *file_lines = NULL;
298	+	file_line_t *f_ptr;
299	+	static disk_mapping_t *disk_mapping = NULL;
300	+	disk_mapping_t *d_ptr;
301	+	int x = 0;
302	+	int y = 256;
303	+	FILE *f;
304	+	DIR *dsk;
305	+	struct dirent *dsk_ent;
306	+	char linkpointer[PATH_MAX];
307	+	char link_path[PATH_MAX];
308	+	char *p, *r, *q;
309	+
310	+	int dev_num;
311	+	char dev_name[51];
312	+
313	+	if(disk_mapping == NULL){
314	+	/* Read in the path_to_inst file into memory */
315	+	file_lines = malloc(sizeof(file_line_t) * y);
316	+	f_ptr = file_lines;
317	+	if(file_lines == NULL) return NULL;
318	+	f = fopen("/etc/path_to_inst", "r");
319	+	if (f == NULL){
320	+	free(file_lines);
321	+	return NULL;
322	+	}
323	+	for(x=0;fgets(f_ptr->line, sizeof(f_ptr->line), f);x++){
324	+	if ((x+1) >= y){
325	+	y = y*2;
326	+	file_lines = realloc(file_lines, sizeof(file_line_t) * y);
327	+	if (file_lines == NULL) return NULL;
328	+	f_ptr=file_lines+x;
329	+	}
330	+	f_ptr++;
331	+	}
332	+	f_ptr = NULL;
333	+	fclose(f);
334	+
335	+	dsk = opendir("/dev/dsk");
336	+	if (dsk == NULL){
337	+	free(file_lines);
338	+	return NULL;
339	+	}
340	+
341	+	while((dsk_ent = readdir(dsk)) != NULL){
342	+	snprintf(link_path, sizeof(link_path), "/dev/dsk/%s", dsk_ent->d_name);
343	+	/* Ignore the non symlinks, e.g. ".." and "." */
344	+	if((readlink(link_path, linkpointer, PATH_MAX)) == -1) continue;
345	+	/* We are only intrested in the string past the ../../devices/ part */
346	+	p = strstr(linkpointer, "devices");
347	+	p+=8;
348	+
349	+	/* We are not intrested in the :a etc slices */
350	+	q = strrchr(p, ':');
351	+	*q = '\0';
352	+
353	+	/* char *p should not contain the info we need to look up in the
354	+	* path_to_inst file.
355	+	*/
356	+
357	+	for(f_ptr = file_lines; f_ptr != NULL; f_ptr++){
358	+	r = strstr(f_ptr->line, p);
359	+	if (r != NULL) break;
360	+	}
361	+
362	+	if(r == NULL){
363	+	free(file_lines);
364	+	closedir(dsk);
365	+	return NULL;
366	+	}
367	+
368	+	/* f_ptr should be pointing to the line of path_to_inst we are intrested in now */
369	+
370	+	sscanf(r, "%*s %d \"%50s", &dev_num, dev_name);
371	+	q = strrchr(dev_name, '"');
372	+	if (q == NULL){
373	+	free(file_lines);
374	+	closedir(dsk);
375	+	return NULL;
376	+	}
377	+	*q = '\0';
378	+
379	+	/* Nasty... Add the number to the end of the string.. This means
380	+	* dev_name now contains the sunos name.. E.g. ssd1
381	+	*/
382	+	snprintf(dev_name, 50, "%s%d", dev_name, dev_num);
383	+	if (disk_mapping == NULL){
384	+	disk_mapping = malloc(sizeof(disk_mapping_t));
385	+	d_ptr = disk_mapping;
386	+	}else{
387	+	d_ptr->next = malloc(sizeof(disk_mapping_t));
388	+	d_ptr = d_ptr->next;
389	+	}
390	+
391	+	if (d_ptr == NULL){
392	+	free(file_lines);
393	+	closedir(dsk);
394	+	return NULL;
395	+	}
396	+
397	+	if( ((d_ptr->sunos_name = strdup(dev_name)) == NULL) ||
398	+	((d_ptr->solaris_name = strdup(dsk_ent->d_name))==NULL) ){
399	+	free(file_lines);
400	+	closedir(dsk);
401	+	return NULL;
402	+	}
403	+	}
404	+	free(file_lines);
405	+	closedir(dsk);
406	+	}
407	+
408	+	for(d_ptr = disk_mapping; d_ptr !=NULL; d_ptr=d_ptr->next){
409	+	if(!strcmp(sunos_name, d_ptr->sunos_name)){
410	+	return (strdup(d_ptr->solaris_name));
411	+	}
412	+	}
413	+
414	+	/* If we really fail to find it.. Return the original name back */
415	+	return strdup(sunos_name);
416	+	}
417	+
418	+	#endif
419	+
420		diskio_stat_t *diskio_stat_malloc(int needed_entries, int *cur_entries, diskio_stat_t *diskio_stats){
421
422		if(diskio_stats==NULL){
#	Line 296 | Line 446 | diskio_stat_t *diskio_stat_malloc(int needed_entries,
446		static diskio_stat_t *diskio_stats=NULL;
447		static int num_diskio=0;
448
449	+	#ifdef LINUX
450	+	typedef struct {
451	+	int major;
452	+	int minor;
453	+	} partition;
454	+	#endif
455	+
456		diskio_stat_t *get_diskio_stats(int *entries){
457
458		static int sizeof_diskio_stats=0;
#	Line 311 | Line 468 | diskio_stat_t *get_diskio_stats(int *entries){
468		char *line_ptr;
469		int major, minor;
470		char dev_letter;
471	+	int has_pp_stats = 1;
472	+	static partition *parts = NULL;
473	+	static int alloc_parts = 0;
474	+	int i, n;
475	+	time_t now;
476		#endif
477		#ifdef FREEBSD
478	<	struct statinfo stats;
478	>	static struct statinfo stats;
479	>	static int stats_init = 0;
480		int counter;
481		struct device_selection *dev_sel = NULL;
482		int n_selected, n_selections;
#	Line 323 | Line 486 | diskio_stat_t *get_diskio_stats(int *entries){
486		num_diskio=0;
487
488		#ifdef FREEBSD
489	<	stats.dinfo=malloc(sizeof(struct devinfo));
490	<	if(stats.dinfo==NULL) return NULL;
489	>	if (!stats_init) {
490	>	stats.dinfo=malloc(sizeof(struct devinfo));
491	>	bzero(stats.dinfo, sizeof(struct devinfo));
492	>	if(stats.dinfo==NULL) return NULL;
493	>	stats_init = 1;
494	>	}
495		if ((getdevs(&stats)) < 0) return NULL;
496		/* Not aware of a get all devices, so i said 999. If we ever
497		* find a machine with more than 999 disks, then i'll change
#	Line 354 | Line 521 | diskio_stat_t *get_diskio_stats(int *entries){
521		num_diskio++;
522		}
523		free(dev_sel);
357	–	free(stats.dinfo);
524
525		#endif
526		#ifdef SOLARIS
#	Line 383 | Line 549 | diskio_stat_t *get_diskio_stats(int *entries){
549
550		if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
551
552	<	diskio_stats_ptr->disk_name=strdup(ksp->ks_name);
552	>	diskio_stats_ptr->disk_name=drive_map(ksp->ks_name);
553		diskio_stats_ptr->systime=time(NULL);
554		num_diskio++;
555		}
#	Line 393 | Line 559 | diskio_stat_t *get_diskio_stats(int *entries){
559		#endif
560
561		#ifdef LINUX
562	<	f=fopen("/proc/stat", "r");
563	<	if(f==NULL){
564	<	*entries=0;
565	<	return NULL;
566	<	}
567	<	if((line_ptr=f_read_line(f, "disk_io:"))==NULL){
568	<	*entries=0;
569	<	fclose(f);
570	<	return NULL;
571	<	}
572	<	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
573	<	line_ptr++;
574	<	if(*line_ptr=='\0'){
575	<	break;
562	>	num_diskio = 0;
563	>	n = 0;
564	>
565	>	/* Read /proc/partitions to find what devices exist. Recent 2.4 kernels
566	>	have statistics in here too, so we can use those directly. */
567	>
568	>	f = fopen("/proc/partitions", "r");
569	>	if (f == NULL) goto out;
570	>	now = time(NULL);
571	>
572	>	while ((line_ptr = f_read_line(f, "")) != NULL) {
573	>	char name[20];
574	>	char *s;
575	>	long long rsect, wsect;
576	>
577	>	int nr = sscanf(line_ptr,
578	>	" %d %d %*d %19s %*d %*d %lld %*d %*d %*d %lld",
579	>	&major, &minor, name, &rsect, &wsect);
580	>	if (nr < 3) continue;
581	>	if (nr < 5) {
582	>	has_pp_stats = 0;
583	>	rsect = 0;
584	>	wsect = 0;
585		}
411	–	if((diskio_stats=diskio_stat_malloc(num_diskio+1, &sizeof_diskio_stats, diskio_stats))==NULL){
412	–	fclose(f);
413	–	*entries=0;
414	–	return NULL;
415	–	}
416	–	diskio_stats_ptr=diskio_stats+num_diskio;
586
587	+	/* Skip device names ending in numbers, since they're
588	+	partitions. */
589	+	s = name;
590	+	while (*s != '\0') s++;
591	+	--s;
592	+	if (*s >= '0' && *s <= '9') continue;
593
594	<	if((sscanf(line_ptr, "(%d,%d):(%*d, %*d, %lld, %*d, %lld)", \
595	<	&major, \
596	<	&minor, \
597	<	&diskio_stats_ptr->read_bytes, \
598	<	&diskio_stats_ptr->write_bytes))!=4) {
599	<	continue;
594	>	diskio_stats = diskio_stat_malloc(n + 1, &sizeof_diskio_stats,
595	>	diskio_stats);
596	>	if (diskio_stats == NULL) goto out;
597	>	if (n >= alloc_parts) {
598	>	alloc_parts += 16;
599	>	parts = realloc(parts, alloc_parts * sizeof *parts);
600	>	if (parts == NULL) {
601	>	alloc_parts = 0;
602	>	goto out;
603	>	}
604		}
605
606	<	/* We read the number of blocks. Blocks are stored in 512 bytes */
607	<	diskio_stats_ptr->read_bytes=diskio_stats_ptr->read_bytes*512;
608	<	diskio_stats_ptr->write_bytes=diskio_stats_ptr->write_bytes*512;
606	>	if (diskio_stats[n].disk_name != NULL)
607	>	free(diskio_stats[n].disk_name);
608	>	diskio_stats[n].disk_name = strdup(name);
609	>	diskio_stats[n].read_bytes = rsect * 512;
610	>	diskio_stats[n].write_bytes = wsect * 512;
611	>	diskio_stats[n].systime = now;
612	>	parts[n].major = major;
613	>	parts[n].minor = minor;
614
615	<	if(diskio_stats_ptr->disk_name!=NULL) free(diskio_stats_ptr->disk_name);
615	>	n++;
616	>	}
617
618	<	switch(major){
619	<	case 2:
620	<	if(minor==0){
436	<	diskio_stats_ptr->disk_name=strdup("fd0");
437	<	}
438	<	break;
618	>	if (!has_pp_stats) {
619	>	/* This is an older kernel without stats in /proc/partitions.
620	>	Read what we can from /proc/stat instead. */
621
622	<	case 3:
623	<	if(minor==0){
624	<	diskio_stats_ptr->disk_name=strdup("hda");
625	<	}else{
626	<	diskio_stats_ptr->disk_name=strdup("hdb");
627	<	}
628	<	break;
622	>	f = fopen("/proc/stat", "r");
623	>	if (f == NULL) goto out;
624	>	now = time(NULL);
625	>
626	>	line_ptr = f_read_line(f, "disk_io:");
627	>	if (line_ptr == NULL) goto out;
628	>
629	>	while((line_ptr=strchr(line_ptr, ' '))!=NULL){
630	>	long long rsect, wsect;
631
632	+	if (*++line_ptr == '\0') break;
633	+
634	+	if((sscanf(line_ptr,
635	+	"(%d,%d):(%*d, %*d, %lld, %*d, %lld)",
636	+	&major, &minor, &rsect, &wsect)) != 4) {
637	+	continue;
638	+	}
639	+
640	+	/* Find the corresponding device from earlier.
641	+	Just to add to the fun, "minor" is actually the disk
642	+	number, not the device minor, so we need to figure
643	+	out the real minor number based on the major!
644	+	This list is not exhaustive; if you're running
645	+	an older kernel you probably don't have fancy
646	+	I2O hardware anyway... */
647	+	switch (major) {
648	+	case 3:
649	+	case 21:
650		case 22:
651	<	if(minor==0){
652	<	diskio_stats_ptr->disk_name=strdup("hdc");
653	<	}else{
654	<	diskio_stats_ptr->disk_name=strdup("hdd");
655	<	}
651	>	case 33:
652	>	case 34:
653	>	case 36:
654	>	case 56:
655	>	case 57:
656	>	case 88:
657	>	case 89:
658	>	case 90:
659	>	case 91:
660	>	minor *= 64;
661		break;
662	<	case 8:
663	<	dev_letter='a'+(minor/16);
457	<	diskio_stats_ptr->disk_name=malloc(4);
458	<	snprintf(diskio_stats_ptr->disk_name, 4, "sd%c", dev_letter);
662	>	case 9:
663	>	case 43:
664		break;
665		default:
666	<	/* I have no idea what it is then :) */
462	<	diskio_stats_ptr->disk_name=malloc(16);
463	<	snprintf(diskio_stats_ptr->disk_name, 16, "%d %d", major, minor);
666	>	minor *= 16;
667		break;
668	<	}
668	>	}
669	>	for (i = 0; i < n; i++) {
670	>	if (major == parts[i].major
671	>	&& minor == parts[i].minor)
672	>	break;
673	>	}
674	>	if (i == n) continue;
675
676	<	diskio_stats_ptr->systime=time(NULL);
677	<	num_diskio++;
676	>	/* We read the number of blocks. Blocks are stored in
677	>	512 bytes */
678	>	diskio_stats[i].read_bytes = rsect * 512;
679	>	diskio_stats[i].write_bytes = wsect * 512;
680	>	diskio_stats[i].systime = now;
681	>	}
682		}
683
684	<	fclose(f);
684	>	num_diskio = n;
685	>	out:
686	>	if (f != NULL) fclose(f);
687
688		#endif
689		*entries=num_diskio;

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