[PATCH v4 0/2] ocfs2: Refactor read-only checks to use ocfs2_emergency_state

[PATCH v4 0/2] ocfs2: Refactor read-only checks to use ocfs2_emergency_state

[Ahmet Eray Karadag]

Hi all,

Following the fix for the `make_bad_inode` validation failure (syzbot ID:
b93b65ee321c97861072), this separate series introduces a new helper
function, `ocfs2_emergency_state()`, to improve and centralize
read-only and error state checking.

This is modeled after the `ext4_emergency_state()` pattern, providing
a single, unified location for checking all filesystem-level emergency
conditions. This makes the code cleaner and ensures that any future
checks (e.g., for fatal error states) can be added in one place.

This series is structured as follows:

1.  The first patch introduces the `ocfs2_emergency_state()` helper
    (currently checking for -EROFS) and applies it to `ocfs2_setattr`
    to provide a "fail-fast" mechanism, as suggested by Albin
    Babu Varghese.
2.  The second patch completes the refactoring by converting all
    remaining read-only checks throughout OCFS2 to use this new helper.

Previous-link: https://lore.kernel.org/all/cover.1764643790.git.eraykrdg1@gmail.com/

Ahmet Eray Karadag (2):
  ocfs2: Add ocfs2_emergency_state helper and apply to setattr
  ocfs2: Convert remaining read-only checks to ocfs2_emergency_state

 fs/ocfs2/buffer_head_io.c |  2 +-
 fs/ocfs2/file.c           | 14 ++++++++++----
 fs/ocfs2/inode.c          |  3 +--
 fs/ocfs2/move_extents.c   |  2 +-
 fs/ocfs2/ocfs2.h          | 18 ++++++++++++++++++
 fs/ocfs2/resize.c         |  4 ++--
 fs/ocfs2/super.c          |  2 +-
 7 files changed, 34 insertions(+), 11 deletions(-)

-- 
2.43.0

[PATCH v4 1/2] ocfs2: Add ocfs2_emergency_state helper and apply to setattr

[Ahmet Eray Karadag]

To centralize error checking, follow the pattern of other filesystems
like ext4 (which uses `ext4_emergency_state()`), and prepare for
future enhancements, this patch introduces a new helper function:
`ocfs2_emergency_state()`.

The purpose of this helper is to provide a single, unified location
for checking all filesystem-level emergency conditions. In this
initial implementation, the function only checks for the existing
hard and soft read-only modes, returning -EROFS if either is set.

This provides a foundation where future checks (e.g., for fatal error
states returning -EIO, or shutdown states) can be easily added in
one place.

This patch also adds this new check to the beginning of
`ocfs2_setattr()`. This ensures that operations like `ftruncate`
(which triggered the original BUG) fail-fast with -EROFS when the
filesystem is already in a read-only state.

Suggested-by: Heming Zhao <heming.zhao@suse.com>
Co-developed-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
Signed-off-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
Signed-off-by: Ahmet Eray Karadag <eraykrdg1@gmail.com>
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
---
v2:
 - Introducing new function `ocfs2_is_readonly` to lower the cost
 - Using unlikely for status check
---
v3:
 - Fix compilation error (missing semicolon).
---
v4:
 - Fix code alignment
---
 fs/ocfs2/file.c  |  6 ++++++
 fs/ocfs2/ocfs2.h | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 21d797ccccd0..ddca292944d7 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1136,6 +1136,12 @@ int ocfs2_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 				attr->ia_valid & ATTR_GID ?
 					from_kgid(&init_user_ns, attr->ia_gid) : 0);
 
+	status = ocfs2_emergency_state(osb);
+	if (unlikely(status)) {
+		mlog_errno(status);
+		goto bail;
+	}
+
 	/* ensuring we don't even attempt to truncate a symlink */
 	if (S_ISLNK(inode->i_mode))
 		attr->ia_valid &= ~ATTR_SIZE;
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 6aaa94c554c1..7b50e03dfa66 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -680,6 +680,24 @@ static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
 	return ret;
 }
 
+static inline int ocfs2_is_readonly(struct ocfs2_super *osb)
+{
+	int ret;
+	spin_lock(&osb->osb_lock);
+	ret = osb->osb_flags & (OCFS2_OSB_SOFT_RO | OCFS2_OSB_HARD_RO);
+	spin_unlock(&osb->osb_lock);
+
+	return ret;
+}
+
+static inline int ocfs2_emergency_state(struct ocfs2_super *osb)
+{
+	if (ocfs2_is_readonly(osb))
+		return -EROFS;
+
+	return 0;
+}
+
 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
 {
 	return (osb->s_feature_incompat &
-- 
2.43.0

Re: [PATCH v4 1/2] ocfs2: Add ocfs2_emergency_state helper and apply to setattr

[Joseph Qi]

On 2025/12/3 11:34, Ahmet Eray Karadag wrote:
> To centralize error checking, follow the pattern of other filesystems
> like ext4 (which uses `ext4_emergency_state()`), and prepare for
> future enhancements, this patch introduces a new helper function:
> `ocfs2_emergency_state()`.
> 
> The purpose of this helper is to provide a single, unified location
> for checking all filesystem-level emergency conditions. In this
> initial implementation, the function only checks for the existing
> hard and soft read-only modes, returning -EROFS if either is set.
> 
> This provides a foundation where future checks (e.g., for fatal error
> states returning -EIO, or shutdown states) can be easily added in
> one place.
> 
> This patch also adds this new check to the beginning of
> `ocfs2_setattr()`. This ensures that operations like `ftruncate`
> (which triggered the original BUG) fail-fast with -EROFS when the
> filesystem is already in a read-only state.
> 
> Suggested-by: Heming Zhao <heming.zhao@suse.com>
> Co-developed-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
> Signed-off-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
> Signed-off-by: Ahmet Eray Karadag <eraykrdg1@gmail.com>
> Reviewed-by: Heming Zhao <heming.zhao@suse.com>

Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
> ---
> v2:
>  - Introducing new function `ocfs2_is_readonly` to lower the cost
>  - Using unlikely for status check
> ---
> v3:
>  - Fix compilation error (missing semicolon).
> ---
> v4:
>  - Fix code alignment
> ---
>  fs/ocfs2/file.c  |  6 ++++++
>  fs/ocfs2/ocfs2.h | 18 ++++++++++++++++++
>  2 files changed, 24 insertions(+)
> 
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index 21d797ccccd0..ddca292944d7 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -1136,6 +1136,12 @@ int ocfs2_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
>  				attr->ia_valid & ATTR_GID ?
>  					from_kgid(&init_user_ns, attr->ia_gid) : 0);
>  
> +	status = ocfs2_emergency_state(osb);
> +	if (unlikely(status)) {
> +		mlog_errno(status);
> +		goto bail;
> +	}
> +
>  	/* ensuring we don't even attempt to truncate a symlink */
>  	if (S_ISLNK(inode->i_mode))
>  		attr->ia_valid &= ~ATTR_SIZE;
> diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
> index 6aaa94c554c1..7b50e03dfa66 100644
> --- a/fs/ocfs2/ocfs2.h
> +++ b/fs/ocfs2/ocfs2.h
> @@ -680,6 +680,24 @@ static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
>  	return ret;
>  }
>  
> +static inline int ocfs2_is_readonly(struct ocfs2_super *osb)
> +{
> +	int ret;
> +	spin_lock(&osb->osb_lock);
> +	ret = osb->osb_flags & (OCFS2_OSB_SOFT_RO | OCFS2_OSB_HARD_RO);
> +	spin_unlock(&osb->osb_lock);
> +
> +	return ret;
> +}
> +
> +static inline int ocfs2_emergency_state(struct ocfs2_super *osb)
> +{
> +	if (ocfs2_is_readonly(osb))
> +		return -EROFS;
> +
> +	return 0;
> +}
> +
>  static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
>  {
>  	return (osb->s_feature_incompat &

[PATCH v4 2/2] ocfs2: Convert remaining read-only checks to ocfs2_emergency_state

[Ahmet Eray Karadag]

Now that the centralized `ocfs2_emergency_state()` helper is available,
refactor remaining filesystem-wide checks for `ocfs2_is_soft_readonly`
and `ocfs2_is_hard_readonly` to use this new function.

To ensure strict consistency with the previous behavior and guarantee
no functional changes, the call sites continue to explicitly return
-EROFS when the emergency state is detected. This standardizes the
check logic while preserving the existing error handling flow.

Co-developed-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
Signed-off-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
Signed-off-by: Ahmet Eray Karadag <eraykrdg1@gmail.com>
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
---
v2:
 - Use `unlikely()` for status check
---
v4:
 - Ensure consistency with the previous behavior as requested
---
 fs/ocfs2/buffer_head_io.c | 2 +-
 fs/ocfs2/file.c           | 8 ++++----
 fs/ocfs2/inode.c          | 3 +--
 fs/ocfs2/move_extents.c   | 2 +-
 fs/ocfs2/resize.c         | 4 ++--
 fs/ocfs2/super.c          | 2 +-
 6 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
index 8f714406528d..701d27d908d4 100644
--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -434,7 +434,7 @@ int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
 	BUG_ON(buffer_jbd(bh));
 	ocfs2_check_super_or_backup(osb->sb, bh->b_blocknr);
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) {
+	if (unlikely(ocfs2_emergency_state(osb))) {
 		ret = -EROFS;
 		mlog_errno(ret);
 		goto out;
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index ddca292944d7..732c61599159 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -179,7 +179,7 @@ static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
 			      file->f_path.dentry->d_name.name,
 			      (unsigned long long)datasync);
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return -EROFS;
 
 	err = file_write_and_wait_range(file, start, end);
@@ -209,7 +209,7 @@ int ocfs2_should_update_atime(struct inode *inode,
 	struct timespec64 now;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return 0;
 
 	if ((inode->i_flags & S_NOATIME) ||
@@ -1949,7 +1949,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
 	handle_t *handle;
 	unsigned long long max_off = inode->i_sb->s_maxbytes;
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return -EROFS;
 
 	inode_lock(inode);
@@ -2713,7 +2713,7 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
 		return -EINVAL;
 	if (!ocfs2_refcount_tree(osb))
 		return -EOPNOTSUPP;
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return -EROFS;
 
 	/* Lock both files against IO */
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index fcc89856ab95..b7dad049cfa3 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1586,8 +1586,7 @@ static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
 	trace_ocfs2_filecheck_repair_inode_block(
 		(unsigned long long)bh->b_blocknr);
 
-	if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
-	    ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
+	if (unlikely(ocfs2_emergency_state(OCFS2_SB(sb)))) {
 		mlog(ML_ERROR,
 		     "Filecheck: cannot repair dinode #%llu "
 		     "on readonly filesystem\n",
diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index 86f2631e6360..71025d7b2d4b 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -898,7 +898,7 @@ static int ocfs2_move_extents(struct ocfs2_move_extents_context *context)
 	struct buffer_head *di_bh = NULL;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return -EROFS;
 
 	inode_lock(inode);
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index b0733c08ed13..ac3ec2c21119 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -276,7 +276,7 @@ int ocfs2_group_extend(struct inode * inode, int new_clusters)
 	u32 first_new_cluster;
 	u64 lgd_blkno;
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return -EROFS;
 
 	if (new_clusters < 0)
@@ -466,7 +466,7 @@ int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
 	u16 cl_bpc;
 	u64 bg_ptr;
 
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+	if (unlikely(ocfs2_emergency_state(osb)))
 		return -EROFS;
 
 	main_bm_inode = ocfs2_get_system_file_inode(osb,
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 53daa4482406..c6019d260efc 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -2487,7 +2487,7 @@ static int ocfs2_handle_error(struct super_block *sb)
 		rv = -EIO;
 	} else { /* default option */
 		rv = -EROFS;
-		if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
+		if (sb_rdonly(sb) && ocfs2_emergency_state(osb))
 			return rv;
 
 		pr_crit("OCFS2: File system is now read-only.\n");
-- 
2.43.0

Re: [PATCH v4 2/2] ocfs2: Convert remaining read-only checks to ocfs2_emergency_state

[Joseph Qi]

On 2025/12/3 11:34, Ahmet Eray Karadag wrote:
> Now that the centralized `ocfs2_emergency_state()` helper is available,
> refactor remaining filesystem-wide checks for `ocfs2_is_soft_readonly`
> and `ocfs2_is_hard_readonly` to use this new function.
> 
> To ensure strict consistency with the previous behavior and guarantee
> no functional changes, the call sites continue to explicitly return
> -EROFS when the emergency state is detected. This standardizes the
> check logic while preserving the existing error handling flow.
> 
> Co-developed-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
> Signed-off-by: Albin Babu Varghese <albinbabuvarghese20@gmail.com>
> Signed-off-by: Ahmet Eray Karadag <eraykrdg1@gmail.com>
> Reviewed-by: Heming Zhao <heming.zhao@suse.com>

Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
> ---
> v2:
>  - Use `unlikely()` for status check
> ---
> v4:
>  - Ensure consistency with the previous behavior as requested
> ---
>  fs/ocfs2/buffer_head_io.c | 2 +-
>  fs/ocfs2/file.c           | 8 ++++----
>  fs/ocfs2/inode.c          | 3 +--
>  fs/ocfs2/move_extents.c   | 2 +-
>  fs/ocfs2/resize.c         | 4 ++--
>  fs/ocfs2/super.c          | 2 +-
>  6 files changed, 10 insertions(+), 11 deletions(-)
> 
> diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
> index 8f714406528d..701d27d908d4 100644
> --- a/fs/ocfs2/buffer_head_io.c
> +++ b/fs/ocfs2/buffer_head_io.c
> @@ -434,7 +434,7 @@ int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
>  	BUG_ON(buffer_jbd(bh));
>  	ocfs2_check_super_or_backup(osb->sb, bh->b_blocknr);
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) {
> +	if (unlikely(ocfs2_emergency_state(osb))) {
>  		ret = -EROFS;
>  		mlog_errno(ret);
>  		goto out;
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index ddca292944d7..732c61599159 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -179,7 +179,7 @@ static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
>  			      file->f_path.dentry->d_name.name,
>  			      (unsigned long long)datasync);
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return -EROFS;
>  
>  	err = file_write_and_wait_range(file, start, end);
> @@ -209,7 +209,7 @@ int ocfs2_should_update_atime(struct inode *inode,
>  	struct timespec64 now;
>  	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return 0;
>  
>  	if ((inode->i_flags & S_NOATIME) ||
> @@ -1949,7 +1949,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
>  	handle_t *handle;
>  	unsigned long long max_off = inode->i_sb->s_maxbytes;
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return -EROFS;
>  
>  	inode_lock(inode);
> @@ -2713,7 +2713,7 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
>  		return -EINVAL;
>  	if (!ocfs2_refcount_tree(osb))
>  		return -EOPNOTSUPP;
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return -EROFS;
>  
>  	/* Lock both files against IO */
> diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
> index fcc89856ab95..b7dad049cfa3 100644
> --- a/fs/ocfs2/inode.c
> +++ b/fs/ocfs2/inode.c
> @@ -1586,8 +1586,7 @@ static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
>  	trace_ocfs2_filecheck_repair_inode_block(
>  		(unsigned long long)bh->b_blocknr);
>  
> -	if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
> -	    ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
> +	if (unlikely(ocfs2_emergency_state(OCFS2_SB(sb)))) {
>  		mlog(ML_ERROR,
>  		     "Filecheck: cannot repair dinode #%llu "
>  		     "on readonly filesystem\n",
> diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
> index 86f2631e6360..71025d7b2d4b 100644
> --- a/fs/ocfs2/move_extents.c
> +++ b/fs/ocfs2/move_extents.c
> @@ -898,7 +898,7 @@ static int ocfs2_move_extents(struct ocfs2_move_extents_context *context)
>  	struct buffer_head *di_bh = NULL;
>  	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return -EROFS;
>  
>  	inode_lock(inode);
> diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
> index b0733c08ed13..ac3ec2c21119 100644
> --- a/fs/ocfs2/resize.c
> +++ b/fs/ocfs2/resize.c
> @@ -276,7 +276,7 @@ int ocfs2_group_extend(struct inode * inode, int new_clusters)
>  	u32 first_new_cluster;
>  	u64 lgd_blkno;
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return -EROFS;
>  
>  	if (new_clusters < 0)
> @@ -466,7 +466,7 @@ int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
>  	u16 cl_bpc;
>  	u64 bg_ptr;
>  
> -	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
> +	if (unlikely(ocfs2_emergency_state(osb)))
>  		return -EROFS;
>  
>  	main_bm_inode = ocfs2_get_system_file_inode(osb,
> diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
> index 53daa4482406..c6019d260efc 100644
> --- a/fs/ocfs2/super.c
> +++ b/fs/ocfs2/super.c
> @@ -2487,7 +2487,7 @@ static int ocfs2_handle_error(struct super_block *sb)
>  		rv = -EIO;
>  	} else { /* default option */
>  		rv = -EROFS;
> -		if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
> +		if (sb_rdonly(sb) && ocfs2_emergency_state(osb))
>  			return rv;
>  
>  		pr_crit("OCFS2: File system is now read-only.\n");