@@ -796,7 +796,8 @@ void ext2_error(struct super_block *, const char *, const char *, ...);
extern __printf(3, 4)
void ext2_msg(struct super_block *, const char *, const char *, ...);
extern void ext2_update_dynamic_rev (struct super_block *sb);
-extern void ext2_write_super (struct super_block *);
+extern void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
+ int wait);
/*
* Inodes and files operations
@@ -1615,7 +1615,7 @@ static int __ext2_write_inode(struct inode *inode, int do_sync)
EXT2_SET_RO_COMPAT_FEATURE(sb,
EXT2_FEATURE_RO_COMPAT_LARGE_FILE);
spin_unlock(&EXT2_SB(sb)->s_lock);
- ext2_write_super(sb);
+ ext2_sync_super(sb, EXT2_SB(sb)->s_es, 1);
}
}
}
@@ -36,8 +36,7 @@
#include "xattr.h"
#include "acl.h"
-static void ext2_sync_super(struct super_block *sb,
- struct ext2_super_block *es, int wait);
+static void ext2_write_super(struct super_block *sb);
static int ext2_remount (struct super_block * sb, int * flags, char * data);
static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
static int ext2_sync_fs(struct super_block *sb, int wait);
@@ -1194,8 +1193,8 @@ static void ext2_clear_super_error(struct super_block *sb)
}
}
-static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
- int wait)
+void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
+ int wait)
{
ext2_clear_super_error(sb);
spin_lock(&EXT2_SB(sb)->s_lock);
@@ -1270,7 +1269,7 @@ static int ext2_unfreeze(struct super_block *sb)
return 0;
}
-void ext2_write_super(struct super_block *sb)
+static void ext2_write_super(struct super_block *sb)
{
if (!(sb->s_flags & MS_RDONLY))
ext2_sync_fs(sb, 1);
ext2_sync_fs() could be called without s_umount semaphore held when called through ext2_write_super() from __ext2_write_inode(). This function then calls dquot_writeback_dquots() which relies on s_umount to be held for protection against other quota operations. In fact __ext2_write_inode() does not need all the functionality ext2_write_super() provides. It is enough to just write the superblock. So use ext2_sync_super() instead. Fixes: 9d1ccbe70e0b14545caad12dc73adb3605447df0 Reported-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Jan Kara <jack@suse.cz> --- fs/ext2/ext2.h | 3 ++- fs/ext2/inode.c | 2 +- fs/ext2/super.c | 9 ++++----- 3 files changed, 7 insertions(+), 7 deletions(-) I have queued this patch into my tree and will send it to Linus in the coming merge window unless someone objects.