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Commit 2d1d9b5b authored Oct 03, 2013 by Al Viro

adfs: delayed freeing of sbi



makes ->d_hash() and ->d_compare() safety in RCU mode independent
from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 30687e0a

fs/adfs/adfs.h

+6 −3

Original line number	Original line	Diff line number	Diff line
	@@ -43,9 +43,12 @@ struct adfs_dir_ops;
	* ADFS file system superblock data in memory		* ADFS file system superblock data in memory
	*/		*/
	struct adfs_sb_info {		struct adfs_sb_info {
			union { struct {
	struct adfs_discmap s_map; / bh list containing map */		struct adfs_discmap s_map; / bh list containing map */
	struct adfs_dir_ops s_dir; / directory operations */		struct adfs_dir_ops s_dir; / directory operations */
			};
			struct rcu_head rcu; /* used only at shutdown time */
			};
	kuid_t s_uid; /* owner uid */		kuid_t s_uid; /* owner uid */
	kgid_t s_gid; /* owner gid */		kgid_t s_gid; /* owner gid */
	umode_t s_owner_mask; /* ADFS owner perm -> unix perm */		umode_t s_owner_mask; /* ADFS owner perm -> unix perm */

fs/adfs/super.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -123,8 +123,7 @@ static void adfs_put_super(struct super_block *sb)
	for (i = 0; i < asb->s_map_size; i++)		for (i = 0; i < asb->s_map_size; i++)
	brelse(asb->s_map[i].dm_bh);		brelse(asb->s_map[i].dm_bh);
	kfree(asb->s_map);		kfree(asb->s_map);
	kfree(asb);		kfree_rcu(asb, rcu);
	sb->s_fs_info = NULL;
	}		}

	static int adfs_show_options(struct seq_file seq, struct dentry root)		static int adfs_show_options(struct seq_file seq, struct dentry root)