+
+int ocfs2_validate_inode_block(struct super_block *sb,
+ struct buffer_head *bh)
+{
+ int rc = -EINVAL;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+
+ BUG_ON(!buffer_uptodate(bh));
+
+ if (!OCFS2_IS_VALID_DINODE(di)) {
+ ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
+ (unsigned long long)bh->b_blocknr, 7,
+ di->i_signature);
+ goto bail;
+ }
+
+ if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+ ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
+ (unsigned long long)bh->b_blocknr,
+ (unsigned long long)le64_to_cpu(di->i_blkno));
+ goto bail;
+ }
+
+ if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
+ ocfs2_error(sb,
+ "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
+ (unsigned long long)bh->b_blocknr);
+ goto bail;
+ }
+
+ if (le32_to_cpu(di->i_fs_generation) !=
+ OCFS2_SB(sb)->fs_generation) {
+ ocfs2_error(sb,
+ "Invalid dinode #%llu: fs_generation is %u\n",
+ (unsigned long long)bh->b_blocknr,
+ le32_to_cpu(di->i_fs_generation));
+ goto bail;
+ }
+
+ rc = 0;
+
+bail:
+ return rc;
+}
+
+int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
+ int flags)
+{
+ int rc;
+ struct buffer_head *tmp = *bh;
+
+ rc = ocfs2_read_blocks(inode, OCFS2_I(inode)->ip_blkno, 1, &tmp,
+ flags);
+ if (rc)
+ goto out;
+
+ if (!(flags & OCFS2_BH_READAHEAD)) {
+ rc = ocfs2_validate_inode_block(inode->i_sb, tmp);
+ if (rc) {
+ brelse(tmp);
+ goto out;
+ }
+ }
+
+ /* If ocfs2_read_blocks() got us a new bh, pass it up. */
+ if (!*bh)
+ *bh = tmp;
+
+out:
+ return rc;
+}
+
+int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
+{
+ return ocfs2_read_inode_block_full(inode, bh, 0);
+}