diff options
Diffstat (limited to 'fs/pnode.c')
| -rw-r--r-- | fs/pnode.c | 120 |
1 files changed, 52 insertions, 68 deletions
@@ -13,45 +13,30 @@ #include "pnode.h" /* return the next shared peer mount of @p */ -static inline struct vfsmount *next_peer(struct vfsmount *p) +static inline struct mount *next_peer(struct mount *p) { - return list_entry(p->mnt_share.next, struct vfsmount, mnt_share); + return list_entry(p->mnt_share.next, struct mount, mnt_share); } -static inline struct vfsmount *first_slave(struct vfsmount *p) +static inline struct mount *first_slave(struct mount *p) { - return list_entry(p->mnt_slave_list.next, struct vfsmount, mnt_slave); + return list_entry(p->mnt_slave_list.next, struct mount, mnt_slave); } -static inline struct vfsmount *next_slave(struct vfsmount *p) +static inline struct mount *next_slave(struct mount *p) { - return list_entry(p->mnt_slave.next, struct vfsmount, mnt_slave); + return list_entry(p->mnt_slave.next, struct mount, mnt_slave); } -/* - * Return true if path is reachable from root - * - * namespace_sem is held, and mnt is attached - */ -static bool is_path_reachable(struct vfsmount *mnt, struct dentry *dentry, - const struct path *root) -{ - while (mnt != root->mnt && mnt->mnt_parent != mnt) { - dentry = mnt->mnt_mountpoint; - mnt = mnt->mnt_parent; - } - return mnt == root->mnt && is_subdir(dentry, root->dentry); -} - -static struct vfsmount *get_peer_under_root(struct vfsmount *mnt, - struct mnt_namespace *ns, - const struct path *root) +static struct mount *get_peer_under_root(struct mount *mnt, + struct mnt_namespace *ns, + const struct path *root) { - struct vfsmount *m = mnt; + struct mount *m = mnt; do { /* Check the namespace first for optimization */ - if (m->mnt_ns == ns && is_path_reachable(m, m->mnt_root, root)) + if (m->mnt_ns == ns && is_path_reachable(m, m->mnt.mnt_root, root)) return m; m = next_peer(m); @@ -66,12 +51,12 @@ static struct vfsmount *get_peer_under_root(struct vfsmount *mnt, * * Caller must hold namespace_sem */ -int get_dominating_id(struct vfsmount *mnt, const struct path *root) +int get_dominating_id(struct mount *mnt, const struct path *root) { - struct vfsmount *m; + struct mount *m; for (m = mnt->mnt_master; m != NULL; m = m->mnt_master) { - struct vfsmount *d = get_peer_under_root(m, mnt->mnt_ns, root); + struct mount *d = get_peer_under_root(m, mnt->mnt_ns, root); if (d) return d->mnt_group_id; } @@ -79,10 +64,10 @@ int get_dominating_id(struct vfsmount *mnt, const struct path *root) return 0; } -static int do_make_slave(struct vfsmount *mnt) +static int do_make_slave(struct mount *mnt) { - struct vfsmount *peer_mnt = mnt, *master = mnt->mnt_master; - struct vfsmount *slave_mnt; + struct mount *peer_mnt = mnt, *master = mnt->mnt_master; + struct mount *slave_mnt; /* * slave 'mnt' to a peer mount that has the @@ -90,7 +75,7 @@ static int do_make_slave(struct vfsmount *mnt) * slave it to anything that is available. */ while ((peer_mnt = next_peer(peer_mnt)) != mnt && - peer_mnt->mnt_root != mnt->mnt_root) ; + peer_mnt->mnt.mnt_root != mnt->mnt.mnt_root) ; if (peer_mnt == mnt) { peer_mnt = next_peer(mnt); @@ -116,7 +101,7 @@ static int do_make_slave(struct vfsmount *mnt) struct list_head *p = &mnt->mnt_slave_list; while (!list_empty(p)) { slave_mnt = list_first_entry(p, - struct vfsmount, mnt_slave); + struct mount, mnt_slave); list_del_init(&slave_mnt->mnt_slave); slave_mnt->mnt_master = NULL; } @@ -129,7 +114,7 @@ static int do_make_slave(struct vfsmount *mnt) /* * vfsmount lock must be held for write */ -void change_mnt_propagation(struct vfsmount *mnt, int type) +void change_mnt_propagation(struct mount *mnt, int type) { if (type == MS_SHARED) { set_mnt_shared(mnt); @@ -140,9 +125,9 @@ void change_mnt_propagation(struct vfsmount *mnt, int type) list_del_init(&mnt->mnt_slave); mnt->mnt_master = NULL; if (type == MS_UNBINDABLE) - mnt->mnt_flags |= MNT_UNBINDABLE; + mnt->mnt.mnt_flags |= MNT_UNBINDABLE; else - mnt->mnt_flags &= ~MNT_UNBINDABLE; + mnt->mnt.mnt_flags &= ~MNT_UNBINDABLE; } } @@ -156,20 +141,19 @@ void change_mnt_propagation(struct vfsmount *mnt, int type) * vfsmount found while iterating with propagation_next() is * a peer of one we'd found earlier. */ -static struct vfsmount *propagation_next(struct vfsmount *m, - struct vfsmount *origin) +static struct mount *propagation_next(struct mount *m, + struct mount *origin) { /* are there any slaves of this mount? */ if (!IS_MNT_NEW(m) && !list_empty(&m->mnt_slave_list)) return first_slave(m); while (1) { - struct vfsmount *next; - struct vfsmount *master = m->mnt_master; + struct mount *master = m->mnt_master; if (master == origin->mnt_master) { - next = next_peer(m); - return ((next == origin) ? NULL : next); + struct mount *next = next_peer(m); + return (next == origin) ? NULL : next; } else if (m->mnt_slave.next != &master->mnt_slave_list) return next_slave(m); @@ -187,13 +171,13 @@ static struct vfsmount *propagation_next(struct vfsmount *m, * @type return CL_SLAVE if the new mount has to be * cloned as a slave. */ -static struct vfsmount *get_source(struct vfsmount *dest, - struct vfsmount *last_dest, - struct vfsmount *last_src, - int *type) +static struct mount *get_source(struct mount *dest, + struct mount *last_dest, + struct mount *last_src, + int *type) { - struct vfsmount *p_last_src = NULL; - struct vfsmount *p_last_dest = NULL; + struct mount *p_last_src = NULL; + struct mount *p_last_dest = NULL; while (last_dest != dest->mnt_master) { p_last_dest = last_dest; @@ -233,33 +217,33 @@ static struct vfsmount *get_source(struct vfsmount *dest, * @source_mnt: source mount. * @tree_list : list of heads of trees to be attached. */ -int propagate_mnt(struct vfsmount *dest_mnt, struct dentry *dest_dentry, - struct vfsmount *source_mnt, struct list_head *tree_list) +int propagate_mnt(struct mount *dest_mnt, struct dentry *dest_dentry, + struct mount *source_mnt, struct list_head *tree_list) { - struct vfsmount *m, *child; + struct mount *m, *child; int ret = 0; - struct vfsmount *prev_dest_mnt = dest_mnt; - struct vfsmount *prev_src_mnt = source_mnt; + 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)) { int type; - struct vfsmount *source; + struct mount *source; if (IS_MNT_NEW(m)) continue; source = get_source(m, prev_dest_mnt, prev_src_mnt, &type); - if (!(child = copy_tree(source, source->mnt_root, type))) { + if (!(child = copy_tree(source, source->mnt.mnt_root, type))) { ret = -ENOMEM; list_splice(tree_list, tmp_list.prev); goto out; } - if (is_subdir(dest_dentry, m->mnt_root)) { + if (is_subdir(dest_dentry, m->mnt.mnt_root)) { mnt_set_mountpoint(m, dest_dentry, child); list_add_tail(&child->mnt_hash, tree_list); } else { @@ -275,7 +259,7 @@ int propagate_mnt(struct vfsmount *dest_mnt, struct dentry *dest_dentry, out: br_write_lock(vfsmount_lock); while (!list_empty(&tmp_list)) { - child = list_first_entry(&tmp_list, struct vfsmount, mnt_hash); + child = list_first_entry(&tmp_list, struct mount, mnt_hash); umount_tree(child, 0, &umount_list); } br_write_unlock(vfsmount_lock); @@ -286,7 +270,7 @@ out: /* * return true if the refcount is greater than count */ -static inline int do_refcount_check(struct vfsmount *mnt, int count) +static inline int do_refcount_check(struct mount *mnt, int count) { int mycount = mnt_get_count(mnt) - mnt->mnt_ghosts; return (mycount > count); @@ -302,10 +286,10 @@ static inline int do_refcount_check(struct vfsmount *mnt, int count) * * vfsmount lock must be held for write */ -int propagate_mount_busy(struct vfsmount *mnt, int refcnt) +int propagate_mount_busy(struct mount *mnt, int refcnt) { - struct vfsmount *m, *child; - struct vfsmount *parent = mnt->mnt_parent; + struct mount *m, *child; + struct mount *parent = mnt->mnt_parent; int ret = 0; if (mnt == parent) @@ -321,7 +305,7 @@ int propagate_mount_busy(struct vfsmount *mnt, int refcnt) for (m = propagation_next(parent, parent); m; m = propagation_next(m, parent)) { - child = __lookup_mnt(m, mnt->mnt_mountpoint, 0); + child = __lookup_mnt(&m->mnt, mnt->mnt_mountpoint, 0); if (child && list_empty(&child->mnt_mounts) && (ret = do_refcount_check(child, 1))) break; @@ -333,17 +317,17 @@ int propagate_mount_busy(struct vfsmount *mnt, int refcnt) * NOTE: unmounting 'mnt' naturally propagates to all other mounts its * parent propagates to. */ -static void __propagate_umount(struct vfsmount *mnt) +static void __propagate_umount(struct mount *mnt) { - struct vfsmount *parent = mnt->mnt_parent; - struct vfsmount *m; + struct mount *parent = mnt->mnt_parent; + struct mount *m; BUG_ON(parent == mnt); for (m = propagation_next(parent, parent); m; m = propagation_next(m, parent)) { - struct vfsmount *child = __lookup_mnt(m, + struct mount *child = __lookup_mnt(&m->mnt, mnt->mnt_mountpoint, 0); /* * umount the child only if the child has no @@ -363,7 +347,7 @@ static void __propagate_umount(struct vfsmount *mnt) */ int propagate_umount(struct list_head *list) { - struct vfsmount *mnt; + struct mount *mnt; list_for_each_entry(mnt, list, mnt_hash) __propagate_umount(mnt); |
