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switch fat to ->s_d_op, close exportfs races there

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don't bother with lock_super() in fat_fill_super() callers, while
we are at it - there won't be any concurrency anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2010-12-18 10:44:00 -05:00
parent 6cc9c1d2c1
commit 3d23985d6c
4 changed files with 27 additions and 47 deletions
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27
fs/fat/namei_msdos.c
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@@ -227,11 +227,7 @@ static struct dentry *msdos_lookup(struct inode *dir, struct dentry *dentry,
}
out:
unlock_super(sb);
d_set_d_op(dentry, &msdos_dentry_operations);
dentry = d_splice_alias(inode, dentry);
if (dentry)
d_set_d_op(dentry, &msdos_dentry_operations);
return dentry;
return d_splice_alias(inode, dentry);
error:
unlock_super(sb);
@@ -661,21 +657,16 @@ static const struct inode_operations msdos_dir_inode_operations = {
.getattr = fat_getattr,
};
static void setup(struct super_block *sb)
{
sb->s_d_op = &msdos_dentry_operations;
sb->s_flags |= MS_NOATIME;
}
static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
lock_super(sb);
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
if (res) {
unlock_super(sb);
return res;
}
sb->s_flags |= MS_NOATIME;
d_set_d_op(sb->s_root, &msdos_dentry_operations);
unlock_super(sb);
return 0;
return fat_fill_super(sb, data, silent, &msdos_dir_inode_operations,
0, setup);
}
static struct dentry *msdos_mount(struct file_system_type *fs_type,