2 * collectd - src/utils_mount.c
3 * Copyright (C) 2005,2006 Niki W. Waibel
5 * This program is free software; you can redistribute it and/
6 * or modify it under the terms of the GNU General Public Li-
7 * cence as published by the Free Software Foundation; either
8 * version 2 of the Licence, or any later version.
10 * This program is distributed in the hope that it will be use-
11 * ful, but WITHOUT ANY WARRANTY; without even the implied war-
12 * ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public Licence for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Niki W. Waibel <niki.waibel@gmx.net>
30 #define XFS_SUPER_MAGIC_STR "XFSB"
31 #define XFS_SUPER_MAGIC2_STR "BSFX"
36 #include "utils_mount.h"
38 #include "common.h" /* sstrncpy() et alii */
39 #include "plugin.h" /* ERROR() macro */
44 # include <sys/types.h>
46 # if HAVE_SYS_STATVFS_H
47 # include <sys/statvfs.h>
49 /* #endif HAVE_GETVFSSTAT */
53 # include <sys/param.h>
56 # include <sys/ucred.h>
59 # include <sys/mount.h>
61 #endif /* HAVE_GETFSSTAT */
67 # include <sys/mnttab.h>
74 #ifdef COLLECTD_MNTTAB
75 # undef COLLECTD_MNTTAB
78 #if defined(_PATH_MOUNTED) /* glibc */
79 # define COLLECTD_MNTTAB _PATH_MOUNTED
80 #elif defined(MNTTAB) /* Solaris */
81 # define COLLECTD_MNTTAB MNTTAB
82 #elif defined(MNT_MNTTAB)
83 # define COLLECTD_MNTTAB MNT_MNTTAB
84 #elif defined(MNTTABNAME)
85 # define COLLECTD_MNTTAB MNTTABNAME
87 # define COLLECTD_MNTTAB KMTAB
89 # define COLLECTD_MNTTAB "/etc/mnttab"
92 /* *** *** *** ********************************************* *** *** *** */
93 /* *** *** *** *** *** *** private functions *** *** *** *** *** *** */
94 /* *** *** *** ********************************************* *** *** *** */
96 /* stolen from quota-3.13 (quota-tools) */
98 #define PROC_PARTITIONS "/proc/partitions"
99 #define DEVLABELDIR "/dev"
103 static struct uuidCache_s {
104 struct uuidCache_s *next;
110 #define EXT2_SUPER_MAGIC 0xEF53
111 struct ext2_super_block {
112 unsigned char s_dummy1[56];
113 unsigned char s_magic[2];
114 unsigned char s_dummy2[46];
115 unsigned char s_uuid[16];
116 char s_volume_name[16];
118 #define ext2magic(s) ((unsigned int)s.s_magic[0] \
119 + (((unsigned int)s.s_magic[1]) << 8))
122 struct xfs_super_block {
123 unsigned char s_magic[4];
124 unsigned char s_dummy[28];
125 unsigned char s_uuid[16];
126 unsigned char s_dummy2[60];
129 #endif /* HAVE_XFS_XQM_H */
131 #define REISER_SUPER_MAGIC "ReIsEr2Fs"
132 struct reiserfs_super_block {
133 unsigned char s_dummy1[52];
134 unsigned char s_magic[10];
135 unsigned char s_dummy2[22];
136 unsigned char s_uuid[16];
137 char s_volume_name[16];
140 /* for now, only ext2 and xfs are supported */
142 get_label_uuid(const char *device, char **label, char *uuid)
144 /* start with ext2 and xfs tests, taken from mount_guess_fstype */
145 /* should merge these later */
148 struct ext2_super_block e2sb;
150 struct xfs_super_block xfsb;
152 struct reiserfs_super_block reisersb;
154 fd = open(device, O_RDONLY);
159 if(lseek(fd, 1024, SEEK_SET) == 1024
160 && read(fd, (char *)&e2sb, sizeof(e2sb)) == sizeof(e2sb)
161 && ext2magic(e2sb) == EXT2_SUPER_MAGIC) {
162 memcpy(uuid, e2sb.s_uuid, sizeof(e2sb.s_uuid));
163 namesize = sizeof(e2sb.s_volume_name);
164 *label = smalloc(namesize + 1);
165 sstrncpy(*label, e2sb.s_volume_name, namesize);
168 } else if(lseek(fd, 0, SEEK_SET) == 0
169 && read(fd, (char *)&xfsb, sizeof(xfsb)) == sizeof(xfsb)
170 && (strncmp((char *)&xfsb.s_magic, XFS_SUPER_MAGIC_STR, 4) == 0 ||
171 strncmp((char *)&xfsb.s_magic, XFS_SUPER_MAGIC2_STR, 4) == 0)) {
172 memcpy(uuid, xfsb.s_uuid, sizeof(xfsb.s_uuid));
173 namesize = sizeof(xfsb.s_fsname);
174 *label = smalloc(namesize + 1);
175 sstrncpy(*label, xfsb.s_fsname, namesize);
177 #endif /* HAVE_XFS_XQM_H */
178 } else if(lseek(fd, 65536, SEEK_SET) == 65536
179 && read(fd, (char *)&reisersb, sizeof(reisersb)) == sizeof(reisersb)
180 && !strncmp((char *)&reisersb.s_magic, REISER_SUPER_MAGIC, 9)) {
181 memcpy(uuid, reisersb.s_uuid, sizeof(reisersb.s_uuid));
182 namesize = sizeof(reisersb.s_volume_name);
183 *label = smalloc(namesize + 1);
184 sstrncpy(*label, reisersb.s_volume_name, namesize);
192 uuidcache_addentry(char *device, char *label, char *uuid)
194 struct uuidCache_s *last;
197 last = uuidCache = smalloc(sizeof(*uuidCache));
199 for(last = uuidCache; last->next; last = last->next);
200 last->next = smalloc(sizeof(*uuidCache));
204 last->device = device;
206 memcpy(last->uuid, uuid, sizeof(last->uuid));
215 static char ptname[100];
217 char uuid[16], *label = NULL;
226 procpt = fopen(PROC_PARTITIONS, "r");
231 for(firstPass = 1; firstPass >= 0; firstPass--) {
232 fseek(procpt, 0, SEEK_SET);
233 while(fgets(line, sizeof(line), procpt)) {
234 if(sscanf(line, " %d %d %d %[^\n ]",
235 &ma, &mi, &sz, ptname) != 4)
240 /* skip extended partitions (heuristic: size 1) */
245 /* look only at md devices on first pass */
246 handleOnFirst = !strncmp(ptname, "md", 2);
247 if(firstPass != handleOnFirst) {
251 /* skip entire disk (minor 0, 64, ... on ide;
253 /* heuristic: partition name ends in a digit */
255 for(s = ptname; *s; s++);
257 if(isdigit((int)s[-1])) {
259 * Note: this is a heuristic only - there is no reason
260 * why these devices should live in /dev.
261 * Perhaps this directory should be specifiable by option.
262 * One might for example have /devlabel with links to /dev
263 * for the devices that may be accessed in this way.
264 * (This is useful, if the cdrom on /dev/hdc must not
267 ssnprintf(device, sizeof(device), "%s/%s",
268 DEVLABELDIR, ptname);
269 if(!get_label_uuid(device, &label, uuid)) {
270 uuidcache_addentry(sstrdup(device),
282 if(isdigit((int)c)) {
284 } else if(islower((int)c)) {
285 return (c - 'a' + 10);
287 return (c - 'A' + 10);
292 get_spec_by_x(int n, const char *t)
294 struct uuidCache_s *uc;
302 if(!memcmp(t, uc->uuid, sizeof(uc->uuid))) {
303 return sstrdup(uc->device);
307 if(!strcmp(t, uc->label)) {
308 return sstrdup(uc->device);
318 get_spec_by_uuid(const char *s)
324 || s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-') {
328 for(i=0; i<16; i++) {
332 if(!isxdigit((int)s[0]) || !isxdigit((int)s[1])) {
335 uuid[i] = ((fromhex(s[0]) << 4) | fromhex(s[1]));
338 return get_spec_by_x(UUID, uuid);
341 DEBUG("utils_mount: Found an invalid UUID: %s", s);
345 static char *get_spec_by_volume_label(const char *s)
347 return get_spec_by_x (VOL, s);
350 static char *get_device_name(const char *optstr)
358 else if (strncmp (optstr, "UUID=", 5) == 0)
360 DEBUG ("utils_mount: TODO: check UUID= code!");
361 rc = get_spec_by_uuid (optstr + 5);
363 else if (strncmp (optstr, "LABEL=", 6) == 0)
365 DEBUG ("utils_mount: TODO: check LABEL= code!");
366 rc = get_spec_by_volume_label (optstr + 6);
370 rc = sstrdup (optstr);
375 DEBUG ("utils_mount: Error checking device name: optstr = %s", optstr);
380 /* What weird OS is this..? I can't find any info with google :/ -octo */
381 #if HAVE_LISTMNTENT && 0
382 static cu_mount_t *cu_mount_listmntent (void)
384 cu_mount_t *last = *list;
388 struct tabmntent *mntlist;
389 if(listmntent(&mntlist, COLLECTD_MNTTAB, NULL, NULL) < 0) {
392 DEBUG("utils_mount: calling listmntent() failed: %s",
393 sstrerror (errno, errbuf, sizeof (errbuf)));
394 #endif /* COLLECT_DEBUG */
397 for(p = mntlist; p; p = p->next) {
398 char *loop = NULL, *device = NULL;
401 loop = cu_mount_getoptionvalue(mnt->mnt_opts, "loop=");
402 if(loop == NULL) { /* no loop= mount */
403 device = get_device_name(mnt->mnt_fsname);
405 DEBUG("utils_mount: can't get devicename for fs (%s) %s (%s)"
406 ": ignored", mnt->mnt_type,
407 mnt->mnt_dir, mnt->mnt_fsname);
414 *list = (cu_mount_t *)smalloc(sizeof(cu_mount_t));
417 while(last->next != NULL) { /* is last really last? */
420 last->next = (cu_mount_t *)smalloc(sizeof(cu_mount_t));
423 last->dir = sstrdup(mnt->mnt_dir);
424 last->spec_device = sstrdup(mnt->mnt_fsname);
425 last->device = device;
426 last->type = sstrdup(mnt->mnt_type);
427 last->options = sstrdup(mnt->mnt_opts);
429 } /* for(p = mntlist; p; p = p->next) */
432 } /* cu_mount_t *cu_mount_listmntent(void) */
433 /* #endif HAVE_LISTMNTENT */
435 /* 4.4BSD and Mac OS X (getfsstat) or NetBSD (getvfsstat) */
436 #elif HAVE_GETVFSSTAT || HAVE_GETFSSTAT
437 static cu_mount_t *cu_mount_getfsstat (void)
440 # define STRUCT_STATFS struct statfs
441 # define CMD_STATFS getfsstat
442 # define FLAGS_STATFS MNT_NOWAIT
443 /* #endif HAVE_GETFSSTAT */
444 #elif HAVE_GETVFSSTAT
445 # define STRUCT_STATFS struct statvfs
446 # define CMD_STATFS getvfsstat
447 # define FLAGS_STATFS ST_NOWAIT
448 #endif /* HAVE_GETVFSSTAT */
456 cu_mount_t *first = NULL;
457 cu_mount_t *last = NULL;
458 cu_mount_t *new = NULL;
460 /* Get the number of mounted file systems */
461 if ((bufsize = CMD_STATFS (NULL, 0, FLAGS_STATFS)) < 1)
465 DEBUG ("utils_mount: getv?fsstat failed: %s",
466 sstrerror (errno, errbuf, sizeof (errbuf)));
467 #endif /* COLLECT_DEBUG */
471 if ((buf = calloc (bufsize, sizeof (*buf))) == NULL)
474 /* The bufsize needs to be passed in bytes. Really. This is not in the
476 if ((num = CMD_STATFS (buf, bufsize * sizeof (STRUCT_STATFS), FLAGS_STATFS)) < 1)
480 DEBUG ("utils_mount: getv?fsstat failed: %s",
481 sstrerror (errno, errbuf, sizeof (errbuf)));
482 #endif /* COLLECT_DEBUG */
487 for (i = 0; i < num; i++)
489 if ((new = calloc (1, sizeof (*new))) == NULL)
492 /* Copy values from `struct mnttab' */
493 new->dir = sstrdup (buf[i].f_mntonname);
494 new->spec_device = sstrdup (buf[i].f_mntfromname);
495 new->type = sstrdup (buf[i].f_fstypename);
497 new->device = get_device_name (new->options);
517 /* #endif HAVE_GETVFSSTAT || HAVE_GETFSSTAT */
519 /* Solaris (SunOS 10): int getmntent(FILE *fp, struct mnttab *mp); */
520 #elif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT
521 static cu_mount_t *cu_mount_gen_getmntent (void)
526 cu_mount_t *first = NULL;
527 cu_mount_t *last = NULL;
528 cu_mount_t *new = NULL;
530 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
532 if ((fp = fopen (COLLECTD_MNTTAB, "r")) == NULL)
535 ERROR ("fopen (%s): %s", COLLECTD_MNTTAB,
536 sstrerror (errno, errbuf, sizeof (errbuf)));
540 while (getmntent (fp, &mt) == 0)
542 if ((new = calloc (1, sizeof (*new))) == NULL)
545 /* Copy values from `struct mnttab' */
546 new->dir = sstrdup (mt.mnt_mountp);
547 new->spec_device = sstrdup (mt.mnt_special);
548 new->type = sstrdup (mt.mnt_fstype);
549 new->options = sstrdup (mt.mnt_mntopts);
550 new->device = get_device_name (new->options);
569 } /* static cu_mount_t *cu_mount_gen_getmntent (void) */
570 /* #endif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT */
572 #elif HAVE_SEQ_GETMNTENT
573 #warn "This version of `getmntent' hat not yet been implemented!"
574 /* #endif HAVE_SEQ_GETMNTENT */
576 #elif HAVE_GETMNTENT_R
577 static cu_mount_t *cu_mount_getmntent (void)
583 cu_mount_t *first = NULL;
584 cu_mount_t *last = NULL;
585 cu_mount_t *new = NULL;
587 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
589 if ((fp = setmntent (COLLECTD_MNTTAB, "r")) == NULL)
592 ERROR ("setmntent (%s): %s", COLLECTD_MNTTAB,
593 sstrerror (errno, errbuf, sizeof (errbuf)));
597 while (getmntent_r (fp, &me, mntbuf, sizeof (mntbuf) ))
599 if ((new = calloc (1, sizeof (*new))) == NULL)
602 /* Copy values from `struct mntent *' */
603 new->dir = sstrdup (me.mnt_dir);
604 new->spec_device = sstrdup (me.mnt_fsname);
605 new->type = sstrdup (me.mnt_type);
606 new->options = sstrdup (me.mnt_opts);
607 new->device = get_device_name (new->options);
610 DEBUG ("utils_mount: new = {dir = %s, spec_device = %s, type = %s, options = %s, device = %s}",
611 new->dir, new->spec_device, new->type, new->options, new->device);
628 DEBUG ("utils_mount: return (0x%p)", (void *) first);
631 } /* HAVE_GETMNTENT_R */
633 #elif HAVE_ONE_GETMNTENT
634 static cu_mount_t *cu_mount_getmntent (void)
639 cu_mount_t *first = NULL;
640 cu_mount_t *last = NULL;
641 cu_mount_t *new = NULL;
643 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
645 if ((fp = setmntent (COLLECTD_MNTTAB, "r")) == NULL)
648 ERROR ("setmntent (%s): %s", COLLECTD_MNTTAB,
649 sstrerror (errno, errbuf, sizeof (errbuf)));
653 while ((me = getmntent (fp)) != NULL)
655 if ((new = calloc (1, sizeof (*new))) == NULL)
658 /* Copy values from `struct mntent *' */
659 new->dir = sstrdup (me->mnt_dir);
660 new->spec_device = sstrdup (me->mnt_fsname);
661 new->type = sstrdup (me->mnt_type);
662 new->options = sstrdup (me->mnt_opts);
663 new->device = get_device_name (new->options);
666 DEBUG ("utils_mount: new = {dir = %s, spec_device = %s, type = %s, options = %s, device = %s}",
667 new->dir, new->spec_device, new->type, new->options, new->device);
684 DEBUG ("utils_mount: return (0x%p)", (void *) first);
688 #endif /* HAVE_ONE_GETMNTENT */
690 /* *** *** *** ******************************************** *** *** *** */
691 /* *** *** *** *** *** *** public functions *** *** *** *** *** *** */
692 /* *** *** *** ******************************************** *** *** *** */
694 cu_mount_t *cu_mount_getlist(cu_mount_t **list)
697 cu_mount_t *first = NULL;
698 cu_mount_t *last = NULL;
707 while (last->next != NULL)
711 #if HAVE_LISTMNTENT && 0
712 new = cu_mount_listmntent ();
713 #elif HAVE_GETVFSSTAT || HAVE_GETFSSTAT
714 new = cu_mount_getfsstat ();
715 #elif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT
716 new = cu_mount_gen_getmntent ();
717 #elif HAVE_SEQ_GETMNTENT
718 # error "This version of `getmntent' hat not yet been implemented!"
719 #elif HAVE_ONE_GETMNTENT
720 new = cu_mount_getmntent ();
722 # error "Could not determine how to find mountpoints."
736 while ((last != NULL) && (last->next != NULL))
740 } /* cu_mount_t *cu_mount_getlist(cu_mount_t **list) */
742 void cu_mount_freelist (cu_mount_t *list)
747 for (this = list; this != NULL; this = next)
752 sfree (this->spec_device);
753 sfree (this->device);
755 sfree (this->options);
758 } /* void cu_mount_freelist(cu_mount_t *list) */
761 cu_mount_checkoption(char *line, const char *keyword, int full)
763 char *line2, *l2, *p1, *p2;
766 if(line == NULL || keyword == NULL) {
774 line2 = sstrdup(line);
785 p2 = strchr(line, ',');
787 if(strncmp(line2+(p1-line)+1, keyword, l+full) == 0) {
793 p2 = strchr(p1+1, ',');
799 } /* char *cu_mount_checkoption(char *line, char *keyword, int full) */
802 cu_mount_getoptionvalue(char *line, const char *keyword)
806 r = cu_mount_checkoption(line, keyword, 0);
809 r += strlen(keyword);
819 sstrncpy(m, r, p-r+1);
824 } /* char *cu_mount_getoptionvalue(char *line, const char *keyword) */
827 cu_mount_type(const char *type)
829 if(strcmp(type, "ext3") == 0) return CUMT_EXT3;
830 if(strcmp(type, "ext2") == 0) return CUMT_EXT2;
831 if(strcmp(type, "ufs") == 0) return CUMT_UFS;
832 if(strcmp(type, "vxfs") == 0) return CUMT_VXFS;
833 if(strcmp(type, "zfs") == 0) return CUMT_ZFS;
835 } /* int cu_mount_type(const char *type) */