diff options
Diffstat (limited to 'fs/erofs/super.c')
| -rw-r--r-- | fs/erofs/super.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/fs/erofs/super.c b/fs/erofs/super.c index e1e9f06e8342..e1020aa60771 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -141,7 +141,7 @@ static int erofs_init_device(struct erofs_buf *buf, struct super_block *sb, struct erofs_deviceslot *dis; struct file *file; - dis = erofs_read_metabuf(buf, sb, *pos, true); + dis = erofs_read_metabuf(buf, sb, *pos, false); if (IS_ERR(dis)) return PTR_ERR(dis); @@ -258,7 +258,7 @@ static int erofs_read_superblock(struct super_block *sb) void *data; int ret; - data = erofs_read_metabuf(&buf, sb, 0, true); + data = erofs_read_metabuf(&buf, sb, 0, false); if (IS_ERR(data)) { erofs_err(sb, "cannot read erofs superblock"); return PTR_ERR(data); @@ -319,6 +319,14 @@ static int erofs_read_superblock(struct super_block *sb) sbi->root_nid = le16_to_cpu(dsb->rb.rootnid_2b); } sbi->packed_nid = le64_to_cpu(dsb->packed_nid); + if (erofs_sb_has_metabox(sbi)) { + if (sbi->sb_size <= offsetof(struct erofs_super_block, + metabox_nid)) + return -EFSCORRUPTED; + sbi->metabox_nid = le64_to_cpu(dsb->metabox_nid); + if (sbi->metabox_nid & BIT_ULL(EROFS_DIRENT_NID_METABOX_BIT)) + return -EFSCORRUPTED; /* self-loop detection */ + } sbi->inos = le64_to_cpu(dsb->inos); sbi->epoch = (s64)le64_to_cpu(dsb->epoch); @@ -335,6 +343,8 @@ static int erofs_read_superblock(struct super_block *sb) if (erofs_sb_has_48bit(sbi)) erofs_info(sb, "EXPERIMENTAL 48-bit layout support in use. Use at your own risk!"); + if (erofs_sb_has_metabox(sbi)) + erofs_info(sb, "EXPERIMENTAL metadata compression support in use. Use at your own risk!"); if (erofs_is_fscache_mode(sb)) erofs_info(sb, "[deprecated] fscache-based on-demand read feature in use. Use at your own risk!"); out: @@ -690,6 +700,12 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) return PTR_ERR(inode); sbi->packed_inode = inode; } + if (erofs_sb_has_metabox(sbi)) { + inode = erofs_iget(sb, sbi->metabox_nid); + if (IS_ERR(inode)) + return PTR_ERR(inode); + sbi->metabox_inode = inode; + } inode = erofs_iget(sb, sbi->root_nid); if (IS_ERR(inode)) @@ -715,6 +731,7 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) if (err) return err; + sbi->dir_ra_bytes = EROFS_DIR_RA_BYTES; erofs_info(sb, "mounted with root inode @ nid %llu.", sbi->root_nid); return 0; } @@ -845,6 +862,8 @@ static void erofs_drop_internal_inodes(struct erofs_sb_info *sbi) { iput(sbi->packed_inode); sbi->packed_inode = NULL; + iput(sbi->metabox_inode); + sbi->metabox_inode = NULL; #ifdef CONFIG_EROFS_FS_ZIP iput(sbi->managed_cache); sbi->managed_cache = NULL; |