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vfs: spread struct mount - mnt_has_parent
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
parent
1ab5973862
commit
676da58df7
@ -2460,8 +2460,9 @@ static int prepend_path(const struct path *path,
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struct dentry * parent;
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if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
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struct mount *mnt = real_mount(vfsmnt);
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/* Global root? */
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if (!mnt_has_parent(vfsmnt))
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if (!mnt_has_parent(mnt))
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goto global_root;
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dentry = vfsmnt->mnt_mountpoint;
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vfsmnt = vfsmnt->mnt_parent;
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@ -10,9 +10,9 @@ static inline struct mount *real_mount(struct vfsmount *mnt)
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return container_of(mnt, struct mount, mnt);
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}
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static inline int mnt_has_parent(struct vfsmount *mnt)
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static inline int mnt_has_parent(struct mount *mnt)
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{
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return mnt != mnt->mnt_parent;
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return &mnt->mnt != mnt->mnt.mnt_parent;
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}
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extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
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@ -1195,7 +1195,7 @@ void release_mounts(struct list_head *head)
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while (!list_empty(head)) {
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mnt = list_first_entry(head, struct mount, mnt_hash);
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list_del_init(&mnt->mnt_hash);
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if (mnt_has_parent(&mnt->mnt)) {
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if (mnt_has_parent(mnt)) {
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struct dentry *dentry;
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struct vfsmount *m;
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@ -1235,7 +1235,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)
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p->mnt.mnt_ns = NULL;
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__mnt_make_shortterm(&p->mnt);
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list_del_init(&p->mnt.mnt_child);
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if (mnt_has_parent(&p->mnt)) {
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if (mnt_has_parent(p)) {
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p->mnt.mnt_parent->mnt_ghosts++;
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dentry_reset_mounted(p->mnt.mnt_mountpoint);
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}
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@ -1861,7 +1861,7 @@ static inline int tree_contains_unbindable(struct mount *mnt)
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static int do_move_mount(struct path *path, char *old_name)
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{
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struct path old_path, parent_path;
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struct vfsmount *p;
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struct mount *p;
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struct mount *old;
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int err = 0;
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if (!capable(CAP_SYS_ADMIN))
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@ -1889,7 +1889,7 @@ static int do_move_mount(struct path *path, char *old_name)
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old = real_mount(old_path.mnt);
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if (!mnt_has_parent(old_path.mnt))
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if (!mnt_has_parent(old))
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goto out1;
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if (S_ISDIR(path->dentry->d_inode->i_mode) !=
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@ -1908,8 +1908,8 @@ static int do_move_mount(struct path *path, char *old_name)
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tree_contains_unbindable(old))
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goto out1;
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err = -ELOOP;
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for (p = path->mnt; mnt_has_parent(p); p = p->mnt_parent)
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if (p == old_path.mnt)
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for (p = real_mount(path->mnt); mnt_has_parent(p); p = real_mount(p->mnt.mnt_parent))
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if (p == old)
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goto out1;
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err = attach_recursive_mnt(old, path, &parent_path);
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@ -2562,7 +2562,7 @@ out_type:
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bool is_path_reachable(struct vfsmount *mnt, struct dentry *dentry,
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const struct path *root)
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{
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while (mnt != root->mnt && mnt_has_parent(mnt)) {
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while (mnt != root->mnt && mnt_has_parent(real_mount(mnt))) {
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dentry = mnt->mnt_mountpoint;
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mnt = mnt->mnt_parent;
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}
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@ -2652,11 +2652,11 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root,
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error = -EINVAL;
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if (root.mnt->mnt_root != root.dentry)
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goto out4; /* not a mountpoint */
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if (!mnt_has_parent(root.mnt))
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if (!mnt_has_parent(root_mnt))
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goto out4; /* not attached */
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if (new.mnt->mnt_root != new.dentry)
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goto out4; /* not a mountpoint */
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if (!mnt_has_parent(new.mnt))
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if (!mnt_has_parent(new_mnt))
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goto out4; /* not attached */
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/* make sure we can reach put_old from new_root */
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if (!is_path_reachable(old.mnt, old.dentry, &new))
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