[Ocfs2-devel] [PATCH 2/3] Add group extend for online resize,
take 2
tao.ma
tao.ma at oracle.com
Tue Nov 27 17:32:23 PST 2007
Tao Ma wrote:
> +/*
> + * Extend the filesystem to the new number of clusters specified. This entry
> + * point is only used to extend the current filesystem to the end of the last
> + * existing group.
> + */
> +int ocfs2_group_extend(struct inode * inode, u32 new_clusters)
> +{
> + int ret;
> + handle_t *handle;
> + struct buffer_head *main_bm_bh = NULL;
> + struct buffer_head *group_bh = NULL;
> + struct inode *main_bm_inode = NULL;
> + struct ocfs2_dinode *fe = NULL;
> + struct ocfs2_group_desc *group = NULL;
> + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
> + u16 cl_bpc;
> + u32 first_new_cluster;
> + u64 lgd_blkno;
> +
> + mlog_entry_void();
> +
> + if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> + return -EROFS;
> +
> + if (new_clusters == 0)
> + return 0;
> +
> + main_bm_inode = ocfs2_get_system_file_inode(osb,
> + GLOBAL_BITMAP_SYSTEM_INODE,
> + OCFS2_INVALID_SLOT);
> + if (!main_bm_inode) {
> + ret = -EINVAL;
> + mlog_errno(ret);
> + goto out;
> + }
> +
> + mutex_lock(&main_bm_inode->i_mutex);
> +
> + ret = ocfs2_meta_lock(main_bm_inode, &main_bm_bh, 1);
> + if (ret < 0) {
> + mlog_errno(ret);
> + goto out_mutex;
> + }
> +
> + fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
> +
> + if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
> + ocfs2_group_bitmap_size(osb->sb) * 8) {
> + mlog(0, "The disk is too old. Force to do offline resize.");
> + ret = -EINVAL;
> + goto out_mutex;
> + }
>
A bug here. It should be "goto out_unlock".
I will modify it after I collect all the feedback.
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