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autofs4: Add d_automount() dentry operation

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Add a function to use the newly defined ->d_automount() dentry operation
for triggering mounts instead of doing the user space callback in ->lookup()
and ->d_revalidate().

Note, to be useful the subsequent patch to add the ->d_manage() dentry
operation is also needed so the discussion of functionality is deferred to
that patch.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Ian Kent
2011-01-14 18:45:58 +00:00
committed by Al Viro
parent db3729153e
commit 10584211e4
4 changed files with 189 additions and 112 deletions
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6
fs/autofs4/expire.c
View File

@ -300,6 +300,7 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
spin_unlock(&root->d_lock);
}
ino->flags |= AUTOFS_INF_EXPIRING;
managed_dentry_set_automount(root);
init_completion(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
return root;
@ -408,6 +409,7 @@ found:
expired, (int)expired->d_name.len, expired->d_name.name);
ino = autofs4_dentry_ino(expired);
ino->flags |= AUTOFS_INF_EXPIRING;
managed_dentry_set_automount(expired);
init_completion(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
spin_lock(&autofs4_lock);
@ -479,6 +481,8 @@ int autofs4_expire_run(struct super_block *sb,
spin_lock(&sbi->fs_lock);
ino = autofs4_dentry_ino(dentry);
ino->flags &= ~AUTOFS_INF_EXPIRING;
if (!d_unhashed(dentry))
managed_dentry_clear_automount(dentry);
complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
@ -516,6 +520,8 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
ino->flags &= ~AUTOFS_INF_MOUNTPOINT;
}
ino->flags &= ~AUTOFS_INF_EXPIRING;
if (ret)
managed_dentry_clear_automount(dentry);
complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
dput(dentry);