diff mbox series

[v2,1/3] vfs: add the sb_start_intwrite_trylock() helper

Message ID 1524445859-26970-2-git-send-email-amir73il@gmail.com
State Superseded, archived
Headers show
Series Fix ext4 freeze protection bypass | expand

Commit Message

Amir Goldstein April 23, 2018, 1:10 a.m. UTC 
Needed by ext4 to test frozen fs before updating s_last_mounted.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
 include/linux/fs.h | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Jan Kara April 23, 2018, 2:02 p.m. UTC | #1 
On Sun 22-04-18 18:10:57, Amir Goldstein wrote:
> Needed by ext4 to test frozen fs before updating s_last_mounted.
> 
> Signed-off-by: Amir Goldstein <amir73il@gmail.com>

Looks good. You can add:

Reviewed-by: Jan Kara <jack@suse.cz>

								Honza

> ---
>  include/linux/fs.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 760d8da1b6c7..cac41f1bad05 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -1597,6 +1597,11 @@ static inline void sb_start_intwrite(struct super_block *sb)
>  	__sb_start_write(sb, SB_FREEZE_FS, true);
>  }
>  
> +static inline int sb_start_intwrite_trylock(struct super_block *sb)
> +{
> +	return __sb_start_write(sb, SB_FREEZE_FS, false);
> +}
> +
>  
>  extern bool inode_owner_or_capable(const struct inode *inode);
>  
> -- 
> 2.7.4
>
diff mbox series

Patch

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 760d8da1b6c7..cac41f1bad05 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1597,6 +1597,11 @@  static inline void sb_start_intwrite(struct super_block *sb)
 	__sb_start_write(sb, SB_FREEZE_FS, true);
 }
 
+static inline int sb_start_intwrite_trylock(struct super_block *sb)
+{
+	return __sb_start_write(sb, SB_FREEZE_FS, false);
+}
+
 
 extern bool inode_owner_or_capable(const struct inode *inode);