[Ocfs2-devel] [PATCH 1/1] ocfs2: Bugfix for hard readonly mount

[Sunil Mushran]

Patch looks good. The description can be improved a little bit.

=======================================
ocfs2: Allow mounting a hard-ro device

Patch fixes bugs to allow mounting the ocfs2 fs existing on a hard-ro device.

Fixes ossbz#1322
http://oss.oracle.com/bugzilla/show_bug.cgi?id=1322

Signed-off-by: Tiger Yang<tiger.yang at oracle.com>

========================================

You can add:
Reviewed-by: Sunil Mushran <sunil.mushran at oracle.com>

Sunil

On 05/27/2011 09:34 AM, Tiger Yang wrote:
> This patch fixes few bugs when do hard readonly mount.
> see detail: http://oss.oracle.com/bugzilla/show_bug.cgi?id=1322
>
> Signed-off-by: Tiger Yang<tiger.yang at oracle.com>
> ---
>   fs/ocfs2/dlmglue.c |   21 +++++++++++++++------
>   fs/ocfs2/super.c   |    3 ++-
>   2 files changed, 17 insertions(+), 7 deletions(-)
>
> diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
> index 7642d7c..da103f5 100644
> --- a/fs/ocfs2/dlmglue.c
> +++ b/fs/ocfs2/dlmglue.c
> @@ -1692,7 +1692,7 @@ int ocfs2_open_lock(struct inode *inode)
>   	mlog(0, "inode %llu take PRMODE open lock\n",
>   	     (unsigned long long)OCFS2_I(inode)->ip_blkno);
>
> -	if (ocfs2_mount_local(osb))
> +	if (ocfs2_is_hard_readonly(osb) || ocfs2_mount_local(osb))
>   		goto out;
>
>   	lockres =&OCFS2_I(inode)->ip_open_lockres;
> @@ -1718,6 +1718,12 @@ int ocfs2_try_open_lock(struct inode *inode, int write)
>   	     (unsigned long long)OCFS2_I(inode)->ip_blkno,
>   	     write ? "EXMODE" : "PRMODE");
>
> +	if (ocfs2_is_hard_readonly(osb)) {
> +		if (write)
> +			status = -EROFS;
> +		goto out;
> +	}
> +
>   	if (ocfs2_mount_local(osb))
>   		goto out;
>
> @@ -2298,7 +2304,7 @@ int ocfs2_inode_lock_full_nested(struct inode *inode,
>   	if (ocfs2_is_hard_readonly(osb)) {
>   		if (ex)
>   			status = -EROFS;
> -		goto bail;
> +		goto getbh;
>   	}
>
>   	if (ocfs2_mount_local(osb))
> @@ -2356,7 +2362,7 @@ local:
>   			mlog_errno(status);
>   		goto bail;
>   	}
> -
> +getbh:
>   	if (ret_bh) {
>   		status = ocfs2_assign_bh(inode, ret_bh, local_bh);
>   		if (status<  0) {
> @@ -2628,8 +2634,11 @@ int ocfs2_dentry_lock(struct dentry *dentry, int ex)
>
>   	BUG_ON(!dl);
>
> -	if (ocfs2_is_hard_readonly(osb))
> -		return -EROFS;
> +	if (ocfs2_is_hard_readonly(osb)) {
> +		if (ex)
> +			return -EROFS;
> +		return 0;
> +	}
>
>   	if (ocfs2_mount_local(osb))
>   		return 0;
> @@ -2647,7 +2656,7 @@ void ocfs2_dentry_unlock(struct dentry *dentry, int ex)
>   	struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
>   	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
>
> -	if (!ocfs2_mount_local(osb))
> +	if (!ocfs2_is_hard_readonly(osb)&&  !ocfs2_mount_local(osb))
>   		ocfs2_cluster_unlock(osb,&dl->dl_lockres, level);
>   }
>
> diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
> index 5a521c7..395b26f 100644
> --- a/fs/ocfs2/super.c
> +++ b/fs/ocfs2/super.c
> @@ -1973,7 +1973,8 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
>   	 * If we failed before we got a uuid_str yet, we can't stop
>   	 * heartbeat.  Otherwise, do it.
>   	 */
> -	if (!mnt_err&&  !ocfs2_mount_local(osb)&&  osb->uuid_str)
> +	if (!mnt_err&&  !ocfs2_mount_local(osb)&&  osb->uuid_str&&
> +	    !ocfs2_is_hard_readonly(osb))
>   		hangup_needed = 1;
>
>   	if (osb->cconn)