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Commit 328e6d90 authored by Al Viro's avatar Al Viro
Browse files

switch unlock_mount() to namespace_unlock(), convert all umount_tree() callers 



which allows to kill the last argument of umount_tree() and make release_mounts()
static.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 3ab6abee

fs/namespace.c

+14 −19
Original line number Diff line number Diff line
@@ -1121,7 +1121,7 @@ EXPORT_SYMBOL(may_umount); 


static LIST_HEAD(unmounted);	/* protected by namespace_sem */



void release_mounts(struct list_head *head)

static void release_mounts(struct list_head *head)

{

	struct mount *mnt;

	while (!list_empty(head)) {
@@ -1157,7 +1157,7 @@ static void namespace_unlock(void) 
 * vfsmount lock must be held for write

 * namespace_sem must be held for write

 */

void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)

void umount_tree(struct mount *mnt, int propagate)

{

	LIST_HEAD(tmp_list);

	struct mount *p;
@@ -1181,7 +1181,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill) 
		}

		change_mnt_propagation(p, MS_PRIVATE);

	}

	list_splice(&tmp_list, kill);

	list_splice(&tmp_list, &unmounted);

}



static void shrink_submounts(struct mount *mnt);
@@ -1190,7 +1190,6 @@ static int do_umount(struct mount *mnt, int flags) 
{

	struct super_block *sb = mnt->mnt.mnt_sb;

	int retval;

	LIST_HEAD(umount_list);



	retval = security_sb_umount(&mnt->mnt, flags);

	if (retval)
@@ -1267,7 +1266,7 @@ static int do_umount(struct mount *mnt, int flags) 
	retval = -EBUSY;

	if (flags & MNT_DETACH || !propagate_mount_busy(mnt, 2)) {

		if (!list_empty(&mnt->mnt_list))

			umount_tree(mnt, 1, &unmounted);

			umount_tree(mnt, 1);

		retval = 0;

	}

	br_write_unlock(&vfsmount_lock);
@@ -1401,11 +1400,9 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, 
	return res;

out:

	if (res) {

		LIST_HEAD(umount_list);

		br_write_lock(&vfsmount_lock);

		umount_tree(res, 0, &umount_list);

		umount_tree(res, 0);

		br_write_unlock(&vfsmount_lock);

		release_mounts(&umount_list);

	}

	return q;

}
@@ -1418,7 +1415,7 @@ struct vfsmount *collect_mounts(struct path *path) 
	down_write(&namespace_sem);

	tree = copy_tree(real_mount(path->mnt), path->dentry,

			 CL_COPY_ALL | CL_PRIVATE);

	up_write(&namespace_sem);

	namespace_unlock();

	if (IS_ERR(tree))

		return NULL;

	return &tree->mnt;
@@ -1428,7 +1425,7 @@ void drop_collected_mounts(struct vfsmount *mnt) 
{

	down_write(&namespace_sem);

	br_write_lock(&vfsmount_lock);

	umount_tree(real_mount(mnt), 0, &unmounted);

	umount_tree(real_mount(mnt), 0);

	br_write_unlock(&vfsmount_lock);

	namespace_unlock();

}
@@ -1619,7 +1616,7 @@ static void unlock_mount(struct mountpoint *where) 
{

	struct dentry *dentry = where->m_dentry;

	put_mountpoint(where);

	up_write(&namespace_sem);

	namespace_unlock();

	mutex_unlock(&dentry->d_inode->i_mutex);

}
@@ -1693,7 +1690,6 @@ static int do_change_type(struct path *path, int flag) 
static int do_loopback(struct path *path, const char *old_name,

				int recurse)

{

	LIST_HEAD(umount_list);

	struct path old_path;

	struct mount *mnt = NULL, *old, *parent;

	struct mountpoint *mp;
@@ -1736,12 +1732,11 @@ static int do_loopback(struct path *path, const char *old_name, 
	err = graft_tree(mnt, parent, mp);

	if (err) {

		br_write_lock(&vfsmount_lock);

		umount_tree(mnt, 0, &umount_list);

		umount_tree(mnt, 0);

		br_write_unlock(&vfsmount_lock);

	}

out2:

	unlock_mount(mp);

	release_mounts(&umount_list);

out:

	path_put(&old_path);

	return err;
@@ -2080,7 +2075,7 @@ void mark_mounts_for_expiry(struct list_head *mounts) 
	while (!list_empty(&graveyard)) {

		mnt = list_first_entry(&graveyard, struct mount, mnt_expire);

		touch_mnt_namespace(mnt->mnt_ns);

		umount_tree(mnt, 1, &unmounted);

		umount_tree(mnt, 1);

	}

	br_write_unlock(&vfsmount_lock);

	namespace_unlock();
@@ -2151,7 +2146,7 @@ static void shrink_submounts(struct mount *mnt) 
			m = list_first_entry(&graveyard, struct mount,

						mnt_expire);

			touch_mnt_namespace(m->mnt_ns);

			umount_tree(m, 1, &unmounted);

			umount_tree(m, 1);

		}

	}

}
@@ -2385,7 +2380,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, 
		copy_flags |= CL_SHARED_TO_SLAVE;

	new = copy_tree(old, old->mnt.mnt_root, copy_flags);

	if (IS_ERR(new)) {

		up_write(&namespace_sem);

		namespace_unlock();

		free_mnt_ns(new_ns);

		return ERR_CAST(new);

	}
@@ -2416,7 +2411,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, 
		p = next_mnt(p, old);

		q = next_mnt(q, new);

	}

	up_write(&namespace_sem);

	namespace_unlock();



	if (rootmnt)

		mntput(rootmnt);
@@ -2740,7 +2735,7 @@ void put_mnt_ns(struct mnt_namespace *ns) 
		return;

	down_write(&namespace_sem);

	br_write_lock(&vfsmount_lock);

	umount_tree(ns->root, 0, &unmounted);

	umount_tree(ns->root, 0);

	br_write_unlock(&vfsmount_lock);

	namespace_unlock();

	free_mnt_ns(ns);

fs/pnode.c

+1 −3
Original line number Diff line number Diff line
@@ -225,7 +225,6 @@ int propagate_mnt(struct mount *dest_mnt, struct mountpoint *dest_mp, 
	struct mount *prev_dest_mnt = dest_mnt;

	struct mount *prev_src_mnt  = source_mnt;

	LIST_HEAD(tmp_list);

	LIST_HEAD(umount_list);



	for (m = propagation_next(dest_mnt, dest_mnt); m;

			m = propagation_next(m, dest_mnt)) {
@@ -261,10 +260,9 @@ int propagate_mnt(struct mount *dest_mnt, struct mountpoint *dest_mp, 
	br_write_lock(&vfsmount_lock);

	while (!list_empty(&tmp_list)) {

		child = list_first_entry(&tmp_list, struct mount, mnt_hash);

		umount_tree(child, 0, &umount_list);

		umount_tree(child, 0);

	}

	br_write_unlock(&vfsmount_lock);

	release_mounts(&umount_list);

	return ret;

}

fs/pnode.h

+1 −2
Original line number Diff line number Diff line
@@ -40,8 +40,7 @@ int get_dominating_id(struct mount *mnt, const struct path *root); 
unsigned int mnt_get_count(struct mount *mnt);

void mnt_set_mountpoint(struct mount *, struct mountpoint *,

			struct mount *);

void release_mounts(struct list_head *);

void umount_tree(struct mount *, int, struct list_head *);

void umount_tree(struct mount *, int);

struct mount *copy_tree(struct mount *, struct dentry *, int);

bool is_path_reachable(struct mount *, struct dentry *,

			 const struct path *root);