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>
31 #include "utils_mount.h"
35 #define XFS_SUPER_MAGIC_STR "XFSB"
36 #define XFS_SUPER_MAGIC2_STR "BSFX"
39 #include "common.h" /* sstrncpy() et alii */
40 #include "plugin.h" /* ERROR() macro */
45 # include <sys/types.h>
47 # if HAVE_SYS_STATVFS_H
48 # include <sys/statvfs.h>
50 /* #endif HAVE_GETVFSSTAT */
54 # include <sys/param.h>
57 # include <sys/ucred.h>
60 # include <sys/mount.h>
62 #endif /* HAVE_GETFSSTAT */
68 # include <sys/mnttab.h>
75 #ifdef COLLECTD_MNTTAB
76 # undef COLLECTD_MNTTAB
79 #if defined(_PATH_MOUNTED) /* glibc */
80 # define COLLECTD_MNTTAB _PATH_MOUNTED
81 #elif defined(MNTTAB) /* Solaris */
82 # define COLLECTD_MNTTAB MNTTAB
83 #elif defined(MNT_MNTTAB)
84 # define COLLECTD_MNTTAB MNT_MNTTAB
85 #elif defined(MNTTABNAME)
86 # define COLLECTD_MNTTAB MNTTABNAME
88 # define COLLECTD_MNTTAB KMTAB
90 # define COLLECTD_MNTTAB "/etc/mnttab"
93 /* *** *** *** ********************************************* *** *** *** */
94 /* *** *** *** *** *** *** private functions *** *** *** *** *** *** */
95 /* *** *** *** ********************************************* *** *** *** */
97 /* stolen from quota-3.13 (quota-tools) */
99 #define PROC_PARTITIONS "/proc/partitions"
100 #define DEVLABELDIR "/dev"
104 static struct uuidCache_s {
105 struct uuidCache_s *next;
111 #define EXT2_SUPER_MAGIC 0xEF53
112 struct ext2_super_block {
113 unsigned char s_dummy1[56];
114 unsigned char s_magic[2];
115 unsigned char s_dummy2[46];
116 unsigned char s_uuid[16];
117 char s_volume_name[16];
119 #define ext2magic(s) ((unsigned int)s.s_magic[0] \
120 + (((unsigned int)s.s_magic[1]) << 8))
123 struct xfs_super_block {
124 unsigned char s_magic[4];
125 unsigned char s_dummy[28];
126 unsigned char s_uuid[16];
127 unsigned char s_dummy2[60];
130 #endif /* HAVE_XFS_XQM_H */
132 #define REISER_SUPER_MAGIC "ReIsEr2Fs"
133 struct reiserfs_super_block {
134 unsigned char s_dummy1[52];
135 unsigned char s_magic[10];
136 unsigned char s_dummy2[22];
137 unsigned char s_uuid[16];
138 char s_volume_name[16];
141 /* for now, only ext2 and xfs are supported */
143 get_label_uuid(const char *device, char **label, char *uuid)
145 /* start with ext2 and xfs tests, taken from mount_guess_fstype */
146 /* should merge these later */
149 struct ext2_super_block e2sb;
151 struct xfs_super_block xfsb;
153 struct reiserfs_super_block reisersb;
155 fd = open(device, O_RDONLY);
160 if(lseek(fd, 1024, SEEK_SET) == 1024
161 && read(fd, (char *)&e2sb, sizeof(e2sb)) == sizeof(e2sb)
162 && ext2magic(e2sb) == EXT2_SUPER_MAGIC) {
163 memcpy(uuid, e2sb.s_uuid, sizeof(e2sb.s_uuid));
164 namesize = sizeof(e2sb.s_volume_name);
165 *label = smalloc(namesize + 1);
166 sstrncpy(*label, e2sb.s_volume_name, namesize);
169 } else if(lseek(fd, 0, SEEK_SET) == 0
170 && read(fd, (char *)&xfsb, sizeof(xfsb)) == sizeof(xfsb)
171 && (strncmp((char *)&xfsb.s_magic, XFS_SUPER_MAGIC_STR, 4) == 0 ||
172 strncmp((char *)&xfsb.s_magic, XFS_SUPER_MAGIC2_STR, 4) == 0)) {
173 memcpy(uuid, xfsb.s_uuid, sizeof(xfsb.s_uuid));
174 namesize = sizeof(xfsb.s_fsname);
175 *label = smalloc(namesize + 1);
176 sstrncpy(*label, xfsb.s_fsname, namesize);
178 #endif /* HAVE_XFS_XQM_H */
179 } else if(lseek(fd, 65536, SEEK_SET) == 65536
180 && read(fd, (char *)&reisersb, sizeof(reisersb)) == sizeof(reisersb)
181 && !strncmp((char *)&reisersb.s_magic, REISER_SUPER_MAGIC, 9)) {
182 memcpy(uuid, reisersb.s_uuid, sizeof(reisersb.s_uuid));
183 namesize = sizeof(reisersb.s_volume_name);
184 *label = smalloc(namesize + 1);
185 sstrncpy(*label, reisersb.s_volume_name, namesize);
193 uuidcache_addentry(char *device, char *label, char *uuid)
195 struct uuidCache_s *last;
198 last = uuidCache = smalloc(sizeof(*uuidCache));
200 for(last = uuidCache; last->next; last = last->next);
201 last->next = smalloc(sizeof(*uuidCache));
205 last->device = device;
207 memcpy(last->uuid, uuid, sizeof(last->uuid));
216 static char ptname[100];
218 char uuid[16], *label = NULL;
226 procpt = fopen(PROC_PARTITIONS, "r");
231 for(int 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)
323 || s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-') {
327 for(int i=0; i<16; i++) {
331 if(!isxdigit((int)s[0]) || !isxdigit((int)s[1])) {
334 uuid[i] = ((fromhex(s[0]) << 4) | fromhex(s[1]));
337 return get_spec_by_x(UUID, uuid);
340 DEBUG("utils_mount: Found an invalid UUID: %s", s);
344 static char *get_spec_by_volume_label(const char *s)
346 return get_spec_by_x (VOL, s);
349 static char *get_device_name(const char *optstr)
357 else if (strncmp (optstr, "UUID=", 5) == 0)
359 DEBUG ("utils_mount: TODO: check UUID= code!");
360 rc = get_spec_by_uuid (optstr + 5);
362 else if (strncmp (optstr, "LABEL=", 6) == 0)
364 DEBUG ("utils_mount: TODO: check LABEL= code!");
365 rc = get_spec_by_volume_label (optstr + 6);
369 rc = sstrdup (optstr);
374 DEBUG ("utils_mount: Error checking device name: optstr = %s", optstr);
379 /* What weird OS is this..? I can't find any info with google :/ -octo */
380 #if HAVE_LISTMNTENT && 0
381 static cu_mount_t *cu_mount_listmntent (void)
383 cu_mount_t *last = *list;
386 struct tabmntent *mntlist;
387 if(listmntent(&mntlist, COLLECTD_MNTTAB, NULL, NULL) < 0) {
390 DEBUG("utils_mount: calling listmntent() failed: %s",
391 sstrerror (errno, errbuf, sizeof (errbuf)));
392 #endif /* COLLECT_DEBUG */
395 for(struct tabmntent *p = mntlist; p; p = p->next) {
396 char *loop = NULL, *device = NULL;
399 loop = cu_mount_getoptionvalue(mnt->mnt_opts, "loop=");
400 if(loop == NULL) { /* no loop= mount */
401 device = get_device_name(mnt->mnt_fsname);
403 DEBUG("utils_mount: can't get devicename for fs (%s) %s (%s)"
404 ": ignored", mnt->mnt_type,
405 mnt->mnt_dir, mnt->mnt_fsname);
412 *list = (cu_mount_t *)smalloc(sizeof(cu_mount_t));
415 while(last->next != NULL) { /* is last really last? */
418 last->next = (cu_mount_t *)smalloc(sizeof(cu_mount_t));
421 last->dir = sstrdup(mnt->mnt_dir);
422 last->spec_device = sstrdup(mnt->mnt_fsname);
423 last->device = device;
424 last->type = sstrdup(mnt->mnt_type);
425 last->options = sstrdup(mnt->mnt_opts);
427 } /* for(p = mntlist; p; p = p->next) */
430 } /* cu_mount_t *cu_mount_listmntent(void) */
431 /* #endif HAVE_LISTMNTENT */
433 /* 4.4BSD and Mac OS X (getfsstat) or NetBSD (getvfsstat) */
434 #elif HAVE_GETVFSSTAT || HAVE_GETFSSTAT
435 static cu_mount_t *cu_mount_getfsstat (void)
438 # define STRUCT_STATFS struct statfs
439 # define CMD_STATFS getfsstat
440 # define FLAGS_STATFS MNT_NOWAIT
441 /* #endif HAVE_GETFSSTAT */
442 #elif HAVE_GETVFSSTAT
443 # define STRUCT_STATFS struct statvfs
444 # define CMD_STATFS getvfsstat
445 # define FLAGS_STATFS ST_NOWAIT
446 #endif /* HAVE_GETVFSSTAT */
453 cu_mount_t *first = NULL;
454 cu_mount_t *last = NULL;
455 cu_mount_t *new = NULL;
457 /* Get the number of mounted file systems */
458 if ((bufsize = CMD_STATFS (NULL, 0, FLAGS_STATFS)) < 1)
462 DEBUG ("utils_mount: getv?fsstat failed: %s",
463 sstrerror (errno, errbuf, sizeof (errbuf)));
464 #endif /* COLLECT_DEBUG */
468 if ((buf = calloc (bufsize, sizeof (*buf))) == NULL)
471 /* The bufsize needs to be passed in bytes. Really. This is not in the
473 if ((num = CMD_STATFS (buf, bufsize * sizeof (STRUCT_STATFS), FLAGS_STATFS)) < 1)
477 DEBUG ("utils_mount: getv?fsstat failed: %s",
478 sstrerror (errno, errbuf, sizeof (errbuf)));
479 #endif /* COLLECT_DEBUG */
484 for (int i = 0; i < num; i++)
486 if ((new = calloc (1, sizeof (*new))) == NULL)
489 /* Copy values from `struct mnttab' */
490 new->dir = sstrdup (buf[i].f_mntonname);
491 new->spec_device = sstrdup (buf[i].f_mntfromname);
492 new->type = sstrdup (buf[i].f_fstypename);
494 new->device = get_device_name (new->options);
514 /* #endif HAVE_GETVFSSTAT || HAVE_GETFSSTAT */
516 /* Solaris (SunOS 10): int getmntent(FILE *fp, struct mnttab *mp); */
517 #elif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT
518 static cu_mount_t *cu_mount_gen_getmntent (void)
523 cu_mount_t *first = NULL;
524 cu_mount_t *last = NULL;
525 cu_mount_t *new = NULL;
527 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
529 if ((fp = fopen (COLLECTD_MNTTAB, "r")) == NULL)
532 ERROR ("fopen (%s): %s", COLLECTD_MNTTAB,
533 sstrerror (errno, errbuf, sizeof (errbuf)));
537 while (getmntent (fp, &mt) == 0)
539 if ((new = calloc (1, sizeof (*new))) == NULL)
542 /* Copy values from `struct mnttab' */
543 new->dir = sstrdup (mt.mnt_mountp);
544 new->spec_device = sstrdup (mt.mnt_special);
545 new->type = sstrdup (mt.mnt_fstype);
546 new->options = sstrdup (mt.mnt_mntopts);
547 new->device = get_device_name (new->options);
566 } /* static cu_mount_t *cu_mount_gen_getmntent (void) */
567 /* #endif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT */
569 #elif HAVE_SEQ_GETMNTENT
570 #warn "This version of `getmntent' hat not yet been implemented!"
571 /* #endif HAVE_SEQ_GETMNTENT */
573 #elif HAVE_GETMNTENT_R
574 static cu_mount_t *cu_mount_getmntent (void)
580 cu_mount_t *first = NULL;
581 cu_mount_t *last = NULL;
582 cu_mount_t *new = NULL;
584 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
586 if ((fp = setmntent (COLLECTD_MNTTAB, "r")) == NULL)
589 ERROR ("setmntent (%s): %s", COLLECTD_MNTTAB,
590 sstrerror (errno, errbuf, sizeof (errbuf)));
594 while (getmntent_r (fp, &me, mntbuf, sizeof (mntbuf) ))
596 if ((new = calloc (1, sizeof (*new))) == NULL)
599 /* Copy values from `struct mntent *' */
600 new->dir = sstrdup (me.mnt_dir);
601 new->spec_device = sstrdup (me.mnt_fsname);
602 new->type = sstrdup (me.mnt_type);
603 new->options = sstrdup (me.mnt_opts);
604 new->device = get_device_name (new->options);
607 DEBUG ("utils_mount: new = {dir = %s, spec_device = %s, type = %s, options = %s, device = %s}",
608 new->dir, new->spec_device, new->type, new->options, new->device);
625 DEBUG ("utils_mount: return (0x%p)", (void *) first);
628 } /* HAVE_GETMNTENT_R */
630 #elif HAVE_ONE_GETMNTENT
631 static cu_mount_t *cu_mount_getmntent (void)
636 cu_mount_t *first = NULL;
637 cu_mount_t *last = NULL;
638 cu_mount_t *new = NULL;
640 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
642 if ((fp = setmntent (COLLECTD_MNTTAB, "r")) == NULL)
645 ERROR ("setmntent (%s): %s", COLLECTD_MNTTAB,
646 sstrerror (errno, errbuf, sizeof (errbuf)));
650 while ((me = getmntent (fp)) != NULL)
652 if ((new = calloc (1, sizeof (*new))) == NULL)
655 /* Copy values from `struct mntent *' */
656 new->dir = sstrdup (me->mnt_dir);
657 new->spec_device = sstrdup (me->mnt_fsname);
658 new->type = sstrdup (me->mnt_type);
659 new->options = sstrdup (me->mnt_opts);
660 new->device = get_device_name (new->options);
663 DEBUG ("utils_mount: new = {dir = %s, spec_device = %s, type = %s, options = %s, device = %s}",
664 new->dir, new->spec_device, new->type, new->options, new->device);
681 DEBUG ("utils_mount: return (0x%p)", (void *) first);
685 #endif /* HAVE_ONE_GETMNTENT */
687 /* *** *** *** ******************************************** *** *** *** */
688 /* *** *** *** *** *** *** public functions *** *** *** *** *** *** */
689 /* *** *** *** ******************************************** *** *** *** */
691 cu_mount_t *cu_mount_getlist(cu_mount_t **list)
694 cu_mount_t *first = NULL;
695 cu_mount_t *last = NULL;
704 while (last->next != NULL)
708 #if HAVE_LISTMNTENT && 0
709 new = cu_mount_listmntent ();
710 #elif HAVE_GETVFSSTAT || HAVE_GETFSSTAT
711 new = cu_mount_getfsstat ();
712 #elif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT
713 new = cu_mount_gen_getmntent ();
714 #elif HAVE_SEQ_GETMNTENT
715 # error "This version of `getmntent' hat not yet been implemented!"
716 #elif HAVE_ONE_GETMNTENT
717 new = cu_mount_getmntent ();
719 # error "Could not determine how to find mountpoints."
733 while ((last != NULL) && (last->next != NULL))
737 } /* cu_mount_t *cu_mount_getlist(cu_mount_t **list) */
739 void cu_mount_freelist (cu_mount_t *list)
743 for (cu_mount_t *this = list; this != NULL; this = next)
748 sfree (this->spec_device);
749 sfree (this->device);
751 sfree (this->options);
754 } /* void cu_mount_freelist(cu_mount_t *list) */
757 cu_mount_checkoption(char *line, const char *keyword, int full)
759 char *line2, *l2, *p1, *p2;
762 if(line == NULL || keyword == NULL) {
770 line2 = sstrdup(line);
781 p2 = strchr(line, ',');
783 if(strncmp(line2+(p1-line)+1, keyword, l+full) == 0) {
789 p2 = strchr(p1+1, ',');
795 } /* char *cu_mount_checkoption(char *line, char *keyword, int full) */
798 cu_mount_getoptionvalue(char *line, const char *keyword)
802 r = cu_mount_checkoption(line, keyword, 0);
805 r += strlen(keyword);
815 sstrncpy(m, r, p-r+1);
820 } /* char *cu_mount_getoptionvalue(char *line, const char *keyword) */
823 cu_mount_type(const char *type)
825 if(strcmp(type, "ext3") == 0) return CUMT_EXT3;
826 if(strcmp(type, "ext2") == 0) return CUMT_EXT2;
827 if(strcmp(type, "ufs") == 0) return CUMT_UFS;
828 if(strcmp(type, "vxfs") == 0) return CUMT_VXFS;
829 if(strcmp(type, "zfs") == 0) return CUMT_ZFS;
831 } /* int cu_mount_type(const char *type) */