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Commit 9734c971 authored by Jan Kara's avatar Jan Kara
Browse files

udf: Write LVID to disk after opening / closing 



So far we just marked the buffer as dirty and left writing on flusher thread
but especially on opening that opens possible race window where we could write
other modified fs structures to disk before we mark filesystem as open. So sync
LVID buffer to disk after opening and closing fs.

Reported-by: default avatarSteve Nickel <snickel58@gmail.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent c04e88e2

fs/udf/super.c

+4 −0
Original line number Diff line number Diff line
@@ -1866,6 +1866,8 @@ static void udf_open_lvid(struct super_block *sb) 
	mark_buffer_dirty(bh);

	sbi->s_lvid_dirty = 0;

	mutex_unlock(&sbi->s_alloc_mutex);

	/* Make opening of filesystem visible on the media immediately */

	sync_dirty_buffer(bh);

}



static void udf_close_lvid(struct super_block *sb)
@@ -1906,6 +1908,8 @@ static void udf_close_lvid(struct super_block *sb) 
	mark_buffer_dirty(bh);

	sbi->s_lvid_dirty = 0;

	mutex_unlock(&sbi->s_alloc_mutex);

	/* Make closing of filesystem visible on the media immediately */

	sync_dirty_buffer(bh);

}



u64 lvid_get_unique_id(struct super_block *sb)