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adfs: delayed freeing of sbi

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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-10-03 12:37:18 -04:00
parent 30687e0a47
commit 2d1d9b5b5c
2 changed files with 7 additions and 5 deletions
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9
fs/adfs/adfs.h
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@ -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 {
struct adfs_discmap *s_map; /* bh list containing map */ union { struct {
struct adfs_dir_ops *s_dir; /* directory operations */ struct adfs_discmap *s_map; /* bh list containing map */
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 */

3
fs/adfs/super.c
View file

@ -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)