diff options
| author | ngkaho1234 <ngkaho1234@gmail.com> | 2016-01-30 23:26:22 +0800 |
|---|---|---|
| committer | ngkaho1234 <ngkaho1234@gmail.com> | 2016-01-30 23:26:22 +0800 |
| commit | 8929c98e42e81dce0b00d03a1c7b2f45ee85fe87 (patch) | |
| tree | 4105a1ca03e0c61983402e087d600e973e43faa9 /src/ext4_fs.c | |
| parent | 9b40d089d6cf5912b558dd3e0ca1a246baa6750a (diff) | |
ext4: add read_only parameter to ext4_mount routine.
Now users can mount a filesystem as read-only mode explicitly.
Diffstat (limited to 'src/ext4_fs.c')
| -rw-r--r-- | src/ext4_fs.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/src/ext4_fs.c b/src/ext4_fs.c index 392728d..7a97bc6 100644 --- a/src/ext4_fs.c +++ b/src/ext4_fs.c @@ -55,12 +55,12 @@ #include <string.h> -int ext4_fs_init(struct ext4_fs *fs, struct ext4_blockdev *bdev) +int ext4_fs_init(struct ext4_fs *fs, struct ext4_blockdev *bdev, + bool read_only) { int r, i; uint16_t tmp; uint32_t bsize; - bool read_only = false; ext4_assert(fs && bdev); @@ -82,7 +82,7 @@ int ext4_fs_init(struct ext4_fs *fs, struct ext4_blockdev *bdev) return r; if (read_only) - return ENOTSUP; + fs->read_only = true; /* Compute limits for indirect block levels */ uint32_t blocks_id = bsize / sizeof(uint32_t); @@ -104,14 +104,16 @@ int ext4_fs_init(struct ext4_fs *fs, struct ext4_blockdev *bdev) "last umount error: superblock fs_error flag\n"); - /* Mark system as mounted */ - ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_ERROR_FS); - r = ext4_sb_write(fs->bdev, &fs->sb); - if (r != EOK) - return r; + if (!fs->read_only) { + /* Mark system as mounted */ + ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_ERROR_FS); + r = ext4_sb_write(fs->bdev, &fs->sb); + if (r != EOK) + return r; - /*Update mount count*/ - ext4_set16(&fs->sb, mount_count, ext4_get16(&fs->sb, mount_count) + 1); + /*Update mount count*/ + ext4_set16(&fs->sb, mount_count, ext4_get16(&fs->sb, mount_count) + 1); + } return r; } @@ -123,7 +125,10 @@ int ext4_fs_fini(struct ext4_fs *fs) /*Set superblock state*/ ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_VALID_FS); - return ext4_sb_write(fs->bdev, &fs->sb); + if (!fs->read_only) + return ext4_sb_write(fs->bdev, &fs->sb); + + return EOK; } static void ext4_fs_debug_features_inc(uint32_t features_incompatible) |