Commit a73324da authored by Al Viro's avatar Al Viro
Browse files

vfs: move mnt_mountpoint to struct mount 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 0714a533

fs/dcache.c

+1 −1
Original line number Diff line number Diff line
@@ -2464,7 +2464,7 @@ static int prepend_path(const struct path *path, 
			/* Global root? */

			if (!mnt_has_parent(mnt))

				goto global_root;

			dentry = mnt->mnt.mnt_mountpoint;

			dentry = mnt->mnt_mountpoint;

			mnt = mnt->mnt_parent;

			vfsmnt = &mnt->mnt;

			continue;

fs/mount.h

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
struct mount {

	struct list_head mnt_hash;

	struct mount *mnt_parent;

	struct dentry *mnt_mountpoint;

	struct vfsmount mnt;

};

fs/namei.c

+2 −2
Original line number Diff line number Diff line
@@ -684,7 +684,7 @@ static int follow_up_rcu(struct path *path) 
	parent = mnt->mnt_parent;

	if (&parent->mnt == path->mnt)

		return 0;

	mountpoint = mnt->mnt.mnt_mountpoint;

	mountpoint = mnt->mnt_mountpoint;

	path->dentry = mountpoint;

	path->mnt = &parent->mnt;

	return 1;
@@ -703,7 +703,7 @@ int follow_up(struct path *path) 
		return 0;

	}

	mntget(&parent->mnt);

	mountpoint = dget(mnt->mnt.mnt_mountpoint);

	mountpoint = dget(mnt->mnt_mountpoint);

	br_read_unlock(vfsmount_lock);

	dput(path->dentry);

	path->dentry = mountpoint;

fs/namespace.c

+17 −18
Original line number Diff line number Diff line
@@ -476,7 +476,7 @@ struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry, 
		if (tmp == head)

			break;

		p = list_entry(tmp, struct mount, mnt_hash);

		if (&p->mnt_parent->mnt == mnt && p->mnt.mnt_mountpoint == dentry) {

		if (&p->mnt_parent->mnt == mnt && p->mnt_mountpoint == dentry) {

			found = p;

			break;

		}
@@ -543,7 +543,7 @@ static void dentry_reset_mounted(struct dentry *dentry) 
		struct mount *p;



		list_for_each_entry(p, &mount_hashtable[u], mnt_hash) {

			if (p->mnt.mnt_mountpoint == dentry)

			if (p->mnt_mountpoint == dentry)

				return;

		}

	}
@@ -557,10 +557,10 @@ static void dentry_reset_mounted(struct dentry *dentry) 
 */

static void detach_mnt(struct mount *mnt, struct path *old_path)

{

	old_path->dentry = mnt->mnt.mnt_mountpoint;

	old_path->dentry = mnt->mnt_mountpoint;

	old_path->mnt = &mnt->mnt_parent->mnt;

	mnt->mnt_parent = mnt;

	mnt->mnt.mnt_mountpoint = mnt->mnt.mnt_root;

	mnt->mnt_mountpoint = mnt->mnt.mnt_root;

	list_del_init(&mnt->mnt.mnt_child);

	list_del_init(&mnt->mnt_hash);

	dentry_reset_mounted(old_path->dentry);
@@ -573,7 +573,7 @@ void mnt_set_mountpoint(struct vfsmount *mnt, struct dentry *dentry, 
			struct mount *child_mnt)

{

	child_mnt->mnt_parent = real_mount(mntget(mnt));

	child_mnt->mnt.mnt_mountpoint = dget(dentry);

	child_mnt->mnt_mountpoint = dget(dentry);

	spin_lock(&dentry->d_lock);

	dentry->d_flags |= DCACHE_MOUNTED;

	spin_unlock(&dentry->d_lock);
@@ -626,7 +626,7 @@ static void commit_tree(struct mount *mnt) 
	list_splice(&head, n->list.prev);



	list_add_tail(&mnt->mnt_hash, mount_hashtable +

				hash(&parent->mnt, mnt->mnt.mnt_mountpoint));

				hash(&parent->mnt, mnt->mnt_mountpoint));

	list_add_tail(&mnt->mnt.mnt_child, &parent->mnt.mnt_mounts);

	touch_mnt_namespace(n);

}
@@ -681,7 +681,7 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void 


	mnt->mnt.mnt_root = root;

	mnt->mnt.mnt_sb = root->d_sb;

	mnt->mnt.mnt_mountpoint = mnt->mnt.mnt_root;

	mnt->mnt_mountpoint = mnt->mnt.mnt_root;

	mnt->mnt_parent = mnt;

	return &mnt->mnt;

}
@@ -709,7 +709,7 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root, 
		atomic_inc(&sb->s_active);

		mnt->mnt.mnt_sb = sb;

		mnt->mnt.mnt_root = dget(root);

		mnt->mnt.mnt_mountpoint = mnt->mnt.mnt_root;

		mnt->mnt_mountpoint = mnt->mnt.mnt_root;

		mnt->mnt_parent = mnt;



		if (flag & CL_SLAVE) {
@@ -1201,9 +1201,9 @@ void release_mounts(struct list_head *head) 
			struct vfsmount *m;



			br_write_lock(vfsmount_lock);

			dentry = mnt->mnt.mnt_mountpoint;

			dentry = mnt->mnt_mountpoint;

			m = &mnt->mnt_parent->mnt;

			mnt->mnt.mnt_mountpoint = mnt->mnt.mnt_root;

			mnt->mnt_mountpoint = mnt->mnt.mnt_root;

			mnt->mnt_parent = mnt;

			m->mnt_ghosts--;

			br_write_unlock(vfsmount_lock);
@@ -1238,7 +1238,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill) 
		list_del_init(&p->mnt.mnt_child);

		if (mnt_has_parent(p)) {

			p->mnt_parent->mnt.mnt_ghosts++;

			dentry_reset_mounted(p->mnt.mnt_mountpoint);

			dentry_reset_mounted(p->mnt_mountpoint);

		}

		change_mnt_propagation(p, MS_PRIVATE);

	}
@@ -1412,8 +1412,7 @@ static int mount_is_safe(struct path *path) 
struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,

					int flag)

{

	struct mount *res, *p, *q;

	struct vfsmount *r;

	struct mount *res, *p, *q, *r;

	struct path path;



	if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(&mnt->mnt))
@@ -1422,15 +1421,15 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, 
	res = q = clone_mnt(mnt, dentry, flag);

	if (!q)

		goto Enomem;

	q->mnt.mnt_mountpoint = mnt->mnt.mnt_mountpoint;

	q->mnt_mountpoint = mnt->mnt_mountpoint;



	p = mnt;

	list_for_each_entry(r, &mnt->mnt.mnt_mounts, mnt_child) {

	list_for_each_entry(r, &mnt->mnt.mnt_mounts, mnt.mnt_child) {

		struct mount *s;

		if (!is_subdir(r->mnt_mountpoint, dentry))

			continue;



		for (s = real_mount(r); s; s = next_mnt(s, r)) {

		for (s = r; s; s = next_mnt(s, &r->mnt)) {

			if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(&s->mnt)) {

				s = skip_mnt_tree(s);

				continue;
@@ -1441,7 +1440,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, 
			}

			p = s;

			path.mnt = &q->mnt;

			path.dentry = p->mnt.mnt_mountpoint;

			path.dentry = p->mnt_mountpoint;

			q = clone_mnt(p, p->mnt.mnt_root, flag);

			if (!q)

				goto Enomem;
@@ -2564,7 +2563,7 @@ bool is_path_reachable(struct mount *mnt, struct dentry *dentry, 
			 const struct path *root)

{

	while (&mnt->mnt != root->mnt && mnt_has_parent(mnt)) {

		dentry = mnt->mnt.mnt_mountpoint;

		dentry = mnt->mnt_mountpoint;

		mnt = mnt->mnt_parent;

	}

	return &mnt->mnt == root->mnt && is_subdir(dentry, root->dentry);

fs/pnode.c

+2 −2
Original line number Diff line number Diff line
@@ -308,7 +308,7 @@ int propagate_mount_busy(struct mount *mnt, int refcnt) 


	for (m = propagation_next(&parent->mnt, &parent->mnt); m;

	     		m = propagation_next(m, &parent->mnt)) {

		child = __lookup_mnt(m, mnt->mnt.mnt_mountpoint, 0);

		child = __lookup_mnt(m, mnt->mnt_mountpoint, 0);

		if (child && list_empty(&child->mnt.mnt_mounts) &&

		    (ret = do_refcount_check(child, 1)))

			break;
@@ -331,7 +331,7 @@ static void __propagate_umount(struct mount *mnt) 
			m = propagation_next(m, &parent->mnt)) {



		struct mount *child = __lookup_mnt(m,

					mnt->mnt.mnt_mountpoint, 0);

					mnt->mnt_mountpoint, 0);

		/*

		 * umount the child only if the child has no

		 * other children

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