#endif
#include <time.h>
-#include "linux_version.h"
#include "superblocks.h"
struct ext2_super_block {
#define EXT3_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT3_FEATURE_RO_COMPAT_SUPP
/*
- * Check to see if a filesystem is in /proc/filesystems.
- * Returns 1 if found, 0 if not
- */
-static int fs_proc_check(const char *fs_name)
-{
- FILE *f;
- char buf[80], *cp, *t;
-
- f = fopen("/proc/filesystems", "r");
- if (!f)
- return 0;
- while (!feof(f)) {
- if (!fgets(buf, sizeof(buf), f))
- break;
- cp = buf;
- if (!isspace(*cp)) {
- while (*cp && !isspace(*cp))
- cp++;
- }
- while (*cp && isspace(*cp))
- cp++;
- if ((t = strchr(cp, '\n')) != NULL)
- *t = 0;
- if ((t = strchr(cp, '\t')) != NULL)
- *t = 0;
- if ((t = strchr(cp, ' ')) != NULL)
- *t = 0;
- if (!strcmp(fs_name, cp)) {
- fclose(f);
- return 1;
- }
- }
- fclose(f);
- return (0);
-}
-
-/*
- * Check to see if a filesystem is available as a module
- * Returns 1 if found, 0 if not
- */
-static int check_for_modules(const char *fs_name)
-{
-#ifdef __linux__
- struct utsname uts;
- FILE *f;
- char buf[1024], *cp;
- int namesz;
-
- if (uname(&uts))
- return 0;
- snprintf(buf, sizeof(buf), "/lib/modules/%s/modules.dep", uts.release);
-
- f = fopen(buf, "r");
- if (!f)
- return 0;
-
- namesz = strlen(fs_name);
-
- while (!feof(f)) {
- if (!fgets(buf, sizeof(buf), f))
- break;
- if ((cp = strchr(buf, ':')) != NULL)
- *cp = 0;
- else
- continue;
- if ((cp = strrchr(buf, '/')) == NULL)
- continue;
- cp++;
-
- if (!strncmp(cp, fs_name, namesz) &&
- (!strcmp(cp + namesz, ".ko") ||
- !strcmp(cp + namesz, ".ko.gz"))) {
- fclose(f);
- return 1;
- }
- }
- fclose(f);
-#endif /* __linux__ */
- return 0;
-}
-
-/*
* Starting in 2.6.29, ext4 can be used to support filesystems
* without a journal.
*/
#define EXT4_SUPPORTS_EXT2 KERNEL_VERSION(2, 6, 29)
-static int system_supports_ext2(void)
-{
- static time_t last_check = 0;
- static int ret = -1;
- time_t now = time(0);
-
- if (ret != -1 || (now - last_check) < 5)
- return ret;
- last_check = now;
- ret = (fs_proc_check("ext2") || check_for_modules("ext2"));
- return ret;
-}
-
-static int system_supports_ext4(void)
-{
- static time_t last_check = 0;
- static int ret = -1;
- time_t now = time(0);
-
- if (ret != -1 || (now - last_check) < 5)
- return ret;
- last_check = now;
- ret = (fs_proc_check("ext4") || check_for_modules("ext4"));
- return ret;
-}
-
-static int system_supports_ext4dev(void)
-{
- static time_t last_check = 0;
- static int ret = -1;
- time_t now = time(0);
-
- if (ret != -1 || (now - last_check) < 5)
- return ret;
- last_check = now;
- ret = (fs_proc_check("ext4dev") || check_for_modules("ext4dev"));
- return ret;
-}
/*
* reads superblock and returns:
* fc = feature_compat
static void ext_get_info(blkid_probe pr, int ver, struct ext2_super_block *es)
{
- //struct blkid_chain *chn = blkid_probe_get_chain(pr);
+#if 0
+ struct blkid_chain *chn = blkid_probe_get_chain(pr);
+#endif
- DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n",
+ DBG(PROBE, ul_debug("ext2_sb.compat = %08X:%08X:%08X",
le32_to_cpu(es->s_feature_compat),
le32_to_cpu(es->s_feature_incompat),
le32_to_cpu(es->s_feature_ro_compat)));
if (le32_to_cpu(es->s_feature_compat) & EXT3_FEATURE_COMPAT_HAS_JOURNAL)
blkid_probe_set_uuid_as(pr, es->s_journal_uuid, "EXT_JOURNAL");
-/* if (ver != 2 && (chn->flags & BLKID_SUBLKS_SECTYPE) &&
+#if 0
+ if (ver != 2 && (chn->flags & BLKID_SUBLKS_SECTYPE) &&
((le32_to_cpu(es->s_feature_incompat) & EXT2_FEATURE_INCOMPAT_UNSUPPORTED) == 0))
blkid_probe_set_value(pr, "SEC_TYPE",
(unsigned char *) "ext2",
- sizeof("ext2"));*/
+ sizeof("ext2"));
+#endif
blkid_probe_sprintf_version(pr, "%u.%u",
le32_to_cpu(es->s_rev_level),
es = ext_get_super(pr, NULL, &fi, NULL);
if (!es)
- return -BLKID_ERR_PARAM;
+ return errno ? -errno : 1;
if (!(fi & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
- return -BLKID_ERR_PARAM;
+ return 1;
ext_get_info(pr, 2, es);
+ blkid_probe_set_uuid_as(pr, es->s_uuid, "LOGUUID");
+
return 0;
}
es = ext_get_super(pr, &fc, &fi, &frc);
if (!es)
- return -BLKID_ERR_PARAM;
+ return errno ? -errno : 1;
/* Distinguish between ext3 and ext2 */
if (fc & EXT3_FEATURE_COMPAT_HAS_JOURNAL)
- return -BLKID_ERR_PARAM;
+ return 1;
/* Any features which ext2 doesn't understand */
if ((frc & EXT2_FEATURE_RO_COMPAT_UNSUPPORTED) ||
(fi & EXT2_FEATURE_INCOMPAT_UNSUPPORTED))
- return -BLKID_ERR_PARAM;
-
- /*
- * If ext2 is not present, but ext4 or ext4dev are, then
- * disclaim we are ext2
- */
- if (!system_supports_ext2() &&
- (system_supports_ext4() || system_supports_ext4dev()) &&
- get_linux_version() >= EXT4_SUPPORTS_EXT2)
- return -BLKID_ERR_PARAM;
+ return 1;
ext_get_info(pr, 2, es);
return 0;
es = ext_get_super(pr, &fc, &fi, &frc);
if (!es)
- return -BLKID_ERR_PARAM;
+ return errno ? -errno : 1;
/* ext3 requires journal */
if (!(fc & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
- return -BLKID_ERR_PARAM;
+ return 1;
/* Any features which ext3 doesn't understand */
if ((frc & EXT3_FEATURE_RO_COMPAT_UNSUPPORTED) ||
(fi & EXT3_FEATURE_INCOMPAT_UNSUPPORTED))
- return -BLKID_ERR_PARAM;
+ return 1;
ext_get_info(pr, 3, es);
return 0;
es = ext_get_super(pr, &fc, &fi, &frc);
if (!es)
- return -BLKID_ERR_PARAM;
+ return errno ? -errno : 1;
/* Distinguish from jbd */
if (fi & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
- return -BLKID_ERR_PARAM;
-
- /*
- * If the filesystem does not have a journal and ext2 and ext4
- * is not present, then force this to be detected as an
- * ext4dev filesystem.
- */
- if (!(fc & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
- !system_supports_ext2() && !system_supports_ext4() &&
- system_supports_ext4dev() &&
- get_linux_version() >= EXT4_SUPPORTS_EXT2)
- goto force_ext4dev;
+ return 1;
- /*
- * If the filesystem is marked as OK for use by in-development
- * filesystem code, but ext4dev is not supported, and ext4 is,
- * then don't call ourselves ext4dev, since we should be
- * detected as ext4 in that case.
- *
- * If the filesystem is marked as in use by production
- * filesystem, then it can only be used by ext4 and NOT by
- * ext4dev, so always disclaim we are ext4dev in that case.
- */
- if (le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS) {
- if (!system_supports_ext4dev() && system_supports_ext4())
- return -BLKID_ERR_PARAM;
- } else
- return -BLKID_ERR_PARAM;
+ if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS))
+ return 1;
-force_ext4dev:
ext_get_info(pr, 4, es);
return 0;
}
es = ext_get_super(pr, &fc, &fi, &frc);
if (!es)
- return -1;
+ return errno ? -errno : 1;
/* Distinguish from jbd */
if (fi & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
- return -BLKID_ERR_PARAM;
-
- /*
- * If the filesystem does not have a journal and ext2 is not
- * present, then force this to be detected as an ext2
- * filesystem.
- */
- if (!(fc & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
- !system_supports_ext2() && system_supports_ext4() &&
- get_linux_version() >= EXT4_SUPPORTS_EXT2)
- goto force_ext4;
+ return 1;
/* Ext4 has at least one feature which ext3 doesn't understand */
if (!(frc & EXT3_FEATURE_RO_COMPAT_UNSUPPORTED) &&
!(fi & EXT3_FEATURE_INCOMPAT_UNSUPPORTED))
- return -BLKID_ERR_PARAM;
+ return 1;
-force_ext4:
/*
* If the filesystem is a OK for use by in-development
* filesystem code, and ext4dev is supported or ext4 is not
* filesystem, then it can only be used by ext4 and NOT by
* ext4dev.
*/
- if (le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS) {
- if (system_supports_ext4dev() || !system_supports_ext4())
- return -BLKID_ERR_PARAM;
- }
+ if (le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)
+ return 1;
ext_get_info(pr, 4, es);
return 0;
projects / project / fstools.git / blobdiff