Commit 1a4eeaf2 authored by Al Viro's avatar Al Viro
Browse files

vfs: move mnt_list to struct mount 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent fc7be130

fs/mount.h

+2 −1
Original line number Diff line number Diff line
@@ -19,7 +19,8 @@ struct mount { 
#endif

	struct list_head mnt_mounts;	/* list of children, anchored here */

	struct list_head mnt_child;	/* and going through their mnt_child */

	/* yet to be moved - up to mnt_list */

	/* yet to be moved - up to mnt_devname */

	struct list_head mnt_list;

	struct list_head mnt_expire;	/* link in fs-specific expiry list */

	struct list_head mnt_share;	/* circular list of shared mounts */

	struct list_head mnt_slave_list;/* list of slave mounts */

fs/namespace.c

+24 −23
Original line number Diff line number Diff line
@@ -202,7 +202,7 @@ static struct mount *alloc_vfsmnt(const char *name) 
		INIT_LIST_HEAD(&p->mnt_hash);

		INIT_LIST_HEAD(&p->mnt_child);

		INIT_LIST_HEAD(&p->mnt_mounts);

		INIT_LIST_HEAD(&mnt->mnt_list);

		INIT_LIST_HEAD(&p->mnt_list);

		INIT_LIST_HEAD(&p->mnt_expire);

		INIT_LIST_HEAD(&p->mnt_share);

		INIT_LIST_HEAD(&p->mnt_slave_list);
@@ -618,8 +618,8 @@ static void commit_tree(struct mount *mnt) 


	BUG_ON(parent == mnt);



	list_add_tail(&head, &mnt->mnt.mnt_list);

	list_for_each_entry(m, &head, mnt.mnt_list) {

	list_add_tail(&head, &mnt->mnt_list);

	list_for_each_entry(m, &head, mnt_list) {

		m->mnt_ns = n;

		__mnt_make_longterm(m);

	}
@@ -987,7 +987,8 @@ static void show_type(struct seq_file *m, struct super_block *sb) 


static int show_vfsmnt(struct seq_file *m, void *v)

{

	struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);

	struct mount *r = list_entry(v, struct mount, mnt_list);

	struct vfsmount *mnt = &r->mnt;

	int err = 0;

	struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
@@ -1024,8 +1025,8 @@ const struct seq_operations mounts_op = { 
static int show_mountinfo(struct seq_file *m, void *v)

{

	struct proc_mounts *p = m->private;

	struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);

	struct mount *r = real_mount(mnt);

	struct mount *r = list_entry(v, struct mount, mnt_list);

	struct vfsmount *mnt = &r->mnt;

	struct super_block *sb = mnt->mnt_sb;

	struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };

	struct path root = p->root;
@@ -1092,7 +1093,8 @@ const struct seq_operations mountinfo_op = { 


static int show_vfsstat(struct seq_file *m, void *v)

{

	struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);

	struct mount *r = list_entry(v, struct mount, mnt_list);

	struct vfsmount *mnt = &r->mnt;

	struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };

	int err = 0;
@@ -1235,7 +1237,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill) 


	list_for_each_entry(p, &tmp_list, mnt_hash) {

		list_del_init(&p->mnt_expire);

		list_del_init(&p->mnt.mnt_list);

		list_del_init(&p->mnt_list);

		__touch_mnt_namespace(p->mnt_ns);

		p->mnt_ns = NULL;

		__mnt_make_shortterm(p);
@@ -1331,7 +1333,7 @@ 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.mnt_list))

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

			umount_tree(mnt, 1, &umount_list);

		retval = 0;

	}
@@ -1451,7 +1453,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, 
			if (!q)

				goto Enomem;

			br_write_lock(vfsmount_lock);

			list_add_tail(&q->mnt.mnt_list, &res->mnt.mnt_list);

			list_add_tail(&q->mnt_list, &res->mnt_list);

			attach_mnt(q, &path);

			br_write_unlock(vfsmount_lock);

		}
@@ -1492,12 +1494,12 @@ void drop_collected_mounts(struct vfsmount *mnt) 
int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,

		   struct vfsmount *root)

{

	struct vfsmount *mnt;

	struct mount *mnt;

	int res = f(root, arg);

	if (res)

		return res;

	list_for_each_entry(mnt, &root->mnt_list, mnt_list) {

		res = f(mnt, arg);

	list_for_each_entry(mnt, &real_mount(root)->mnt_list, mnt_list) {

		res = f(&mnt->mnt, arg);

		if (res)

			return res;

	}
@@ -2415,7 +2417,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, 
	}

	new_ns->root = &new->mnt;

	br_write_lock(vfsmount_lock);

	list_add_tail(&new_ns->list, &new_ns->root->mnt_list);

	list_add_tail(&new_ns->list, &new->mnt_list);

	br_write_unlock(vfsmount_lock);



	/*
@@ -2476,18 +2478,17 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns, 
 * create_mnt_ns - creates a private namespace and adds a root filesystem

 * @mnt: pointer to the new root filesystem mountpoint

 */

static struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt)

static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)

{

	struct mnt_namespace *new_ns;



	new_ns = alloc_mnt_ns();

	struct mnt_namespace *new_ns = alloc_mnt_ns();

	if (!IS_ERR(new_ns)) {

		real_mount(mnt)->mnt_ns = new_ns;

		__mnt_make_longterm(real_mount(mnt));

		new_ns->root = mnt;

		list_add(&new_ns->list, &new_ns->root->mnt_list);

		struct mount *mnt = real_mount(m);

		mnt->mnt_ns = new_ns;

		__mnt_make_longterm(mnt);

		new_ns->root = m;

		list_add(&new_ns->list, &mnt->mnt_list);

	} else {

		mntput(mnt);

		mntput(m);

	}

	return new_ns;

}

include/linux/mount.h

+0 −1
Original line number Diff line number Diff line
@@ -57,7 +57,6 @@ struct vfsmount { 
	struct hlist_head mnt_fsnotify_marks;

#endif

	const char *mnt_devname;	/* Name of device e.g. /dev/dsk/hda1 */

	struct list_head mnt_list;

};



struct file; /* forward dec */

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