ocfs2: Bugfix for hard readonly mount

[Pulled before push to mainline]

ocfs2 cannot currently mount a device that is readonly at the media
("hard readonly").  Fix the broken places.
see detail: http://oss.oracle.com/bugzilla/show_bug.cgi?id=1322

[ Description edited -- Joel ]

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Reviewed-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 38a348eb31fca214b00f919efbfd7cd0de608212..486878642ec44c3f5fac5bf52c90f744ac7c73fe 100644 (file)
--- 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 8b1924a1e3866a854403f1d075bde43b62697c76..51a831f9047119295b000fa7236418c83cafe867 100644 (file)
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1995,7 +1995,8 @@ 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)