Lines Matching refs:mnt
81 static inline struct hlist_head *m_hash(struct vfsmount *mnt, struct dentry *dentry) in m_hash() argument
83 unsigned long tmp = ((unsigned long)mnt / L1_CACHE_BYTES); in m_hash()
100 static int mnt_alloc_id(struct mount *mnt) in mnt_alloc_id() argument
107 res = ida_get_new_above(&mnt_id_ida, mnt_id_start, &mnt->mnt_id); in mnt_alloc_id()
109 mnt_id_start = mnt->mnt_id + 1; in mnt_alloc_id()
117 static void mnt_free_id(struct mount *mnt) in mnt_free_id() argument
119 int id = mnt->mnt_id; in mnt_free_id()
132 static int mnt_alloc_group_id(struct mount *mnt) in mnt_alloc_group_id() argument
141 &mnt->mnt_group_id); in mnt_alloc_group_id()
143 mnt_group_start = mnt->mnt_group_id + 1; in mnt_alloc_group_id()
151 void mnt_release_group_id(struct mount *mnt) in mnt_release_group_id() argument
153 int id = mnt->mnt_group_id; in mnt_release_group_id()
157 mnt->mnt_group_id = 0; in mnt_release_group_id()
163 static inline void mnt_add_count(struct mount *mnt, int n) in mnt_add_count() argument
166 this_cpu_add(mnt->mnt_pcp->mnt_count, n); in mnt_add_count()
169 mnt->mnt_count += n; in mnt_add_count()
177 unsigned int mnt_get_count(struct mount *mnt) in mnt_get_count() argument
184 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count; in mnt_get_count()
189 return mnt->mnt_count; in mnt_get_count()
198 mntput(&m->mnt); in drop_mountpoint()
203 struct mount *mnt = kmem_cache_zalloc(mnt_cache, GFP_KERNEL); in alloc_vfsmnt() local
204 if (mnt) { in alloc_vfsmnt()
207 err = mnt_alloc_id(mnt); in alloc_vfsmnt()
212 mnt->mnt_devname = kstrdup_const(name, GFP_KERNEL); in alloc_vfsmnt()
213 if (!mnt->mnt_devname) in alloc_vfsmnt()
218 mnt->mnt_pcp = alloc_percpu(struct mnt_pcp); in alloc_vfsmnt()
219 if (!mnt->mnt_pcp) in alloc_vfsmnt()
222 this_cpu_add(mnt->mnt_pcp->mnt_count, 1); in alloc_vfsmnt()
224 mnt->mnt_count = 1; in alloc_vfsmnt()
225 mnt->mnt_writers = 0; in alloc_vfsmnt()
228 INIT_HLIST_NODE(&mnt->mnt_hash); in alloc_vfsmnt()
229 INIT_LIST_HEAD(&mnt->mnt_child); in alloc_vfsmnt()
230 INIT_LIST_HEAD(&mnt->mnt_mounts); in alloc_vfsmnt()
231 INIT_LIST_HEAD(&mnt->mnt_list); in alloc_vfsmnt()
232 INIT_LIST_HEAD(&mnt->mnt_expire); in alloc_vfsmnt()
233 INIT_LIST_HEAD(&mnt->mnt_share); in alloc_vfsmnt()
234 INIT_LIST_HEAD(&mnt->mnt_slave_list); in alloc_vfsmnt()
235 INIT_LIST_HEAD(&mnt->mnt_slave); in alloc_vfsmnt()
236 INIT_HLIST_NODE(&mnt->mnt_mp_list); in alloc_vfsmnt()
238 INIT_HLIST_HEAD(&mnt->mnt_fsnotify_marks); in alloc_vfsmnt()
240 init_fs_pin(&mnt->mnt_umount, drop_mountpoint); in alloc_vfsmnt()
242 return mnt; in alloc_vfsmnt()
246 kfree_const(mnt->mnt_devname); in alloc_vfsmnt()
249 mnt_free_id(mnt); in alloc_vfsmnt()
251 kmem_cache_free(mnt_cache, mnt); in alloc_vfsmnt()
274 int __mnt_is_readonly(struct vfsmount *mnt) in __mnt_is_readonly() argument
276 if (mnt->mnt_flags & MNT_READONLY) in __mnt_is_readonly()
278 if (mnt->mnt_sb->s_flags & MS_RDONLY) in __mnt_is_readonly()
284 static inline void mnt_inc_writers(struct mount *mnt) in mnt_inc_writers() argument
287 this_cpu_inc(mnt->mnt_pcp->mnt_writers); in mnt_inc_writers()
289 mnt->mnt_writers++; in mnt_inc_writers()
293 static inline void mnt_dec_writers(struct mount *mnt) in mnt_dec_writers() argument
296 this_cpu_dec(mnt->mnt_pcp->mnt_writers); in mnt_dec_writers()
298 mnt->mnt_writers--; in mnt_dec_writers()
302 static unsigned int mnt_get_writers(struct mount *mnt) in mnt_get_writers() argument
309 count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_writers; in mnt_get_writers()
314 return mnt->mnt_writers; in mnt_get_writers()
318 static int mnt_is_readonly(struct vfsmount *mnt) in mnt_is_readonly() argument
320 if (mnt->mnt_sb->s_readonly_remount) in mnt_is_readonly()
324 return __mnt_is_readonly(mnt); in mnt_is_readonly()
345 struct mount *mnt = real_mount(m); in __mnt_want_write() local
349 mnt_inc_writers(mnt); in __mnt_want_write()
356 while (ACCESS_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD) in __mnt_want_write()
365 mnt_dec_writers(mnt); in __mnt_want_write()
406 int mnt_clone_write(struct vfsmount *mnt) in mnt_clone_write() argument
409 if (__mnt_is_readonly(mnt)) in mnt_clone_write()
412 mnt_inc_writers(real_mount(mnt)); in mnt_clone_write()
428 return __mnt_want_write(file->f_path.mnt); in __mnt_want_write_file()
430 return mnt_clone_write(file->f_path.mnt); in __mnt_want_write_file()
444 sb_start_write(file->f_path.mnt->mnt_sb); in mnt_want_write_file()
447 sb_end_write(file->f_path.mnt->mnt_sb); in mnt_want_write_file()
460 void __mnt_drop_write(struct vfsmount *mnt) in __mnt_drop_write() argument
463 mnt_dec_writers(real_mount(mnt)); in __mnt_drop_write()
475 void mnt_drop_write(struct vfsmount *mnt) in mnt_drop_write() argument
477 __mnt_drop_write(mnt); in mnt_drop_write()
478 sb_end_write(mnt->mnt_sb); in mnt_drop_write()
484 __mnt_drop_write(file->f_path.mnt); in __mnt_drop_write_file()
489 mnt_drop_write(file->f_path.mnt); in mnt_drop_write_file()
493 static int mnt_make_readonly(struct mount *mnt) in mnt_make_readonly() argument
498 mnt->mnt.mnt_flags |= MNT_WRITE_HOLD; in mnt_make_readonly()
521 if (mnt_get_writers(mnt) > 0) in mnt_make_readonly()
524 mnt->mnt.mnt_flags |= MNT_READONLY; in mnt_make_readonly()
530 mnt->mnt.mnt_flags &= ~MNT_WRITE_HOLD; in mnt_make_readonly()
535 static void __mnt_unmake_readonly(struct mount *mnt) in __mnt_unmake_readonly() argument
538 mnt->mnt.mnt_flags &= ~MNT_READONLY; in __mnt_unmake_readonly()
544 struct mount *mnt; in sb_prepare_remount_readonly() local
552 list_for_each_entry(mnt, &sb->s_mounts, mnt_instance) { in sb_prepare_remount_readonly()
553 if (!(mnt->mnt.mnt_flags & MNT_READONLY)) { in sb_prepare_remount_readonly()
554 mnt->mnt.mnt_flags |= MNT_WRITE_HOLD; in sb_prepare_remount_readonly()
556 if (mnt_get_writers(mnt) > 0) { in sb_prepare_remount_readonly()
569 list_for_each_entry(mnt, &sb->s_mounts, mnt_instance) { in sb_prepare_remount_readonly()
570 if (mnt->mnt.mnt_flags & MNT_WRITE_HOLD) in sb_prepare_remount_readonly()
571 mnt->mnt.mnt_flags &= ~MNT_WRITE_HOLD; in sb_prepare_remount_readonly()
578 static void free_vfsmnt(struct mount *mnt) in free_vfsmnt() argument
580 kfree_const(mnt->mnt_devname); in free_vfsmnt()
582 free_percpu(mnt->mnt_pcp); in free_vfsmnt()
584 kmem_cache_free(mnt_cache, mnt); in free_vfsmnt()
595 struct mount *mnt; in legitimize_mnt() local
600 mnt = real_mount(bastard); in legitimize_mnt()
601 mnt_add_count(mnt, 1); in legitimize_mnt()
605 mnt_add_count(mnt, -1); in legitimize_mnt()
618 struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry) in __lookup_mnt() argument
620 struct hlist_head *head = m_hash(mnt, dentry); in __lookup_mnt()
624 if (&p->mnt_parent->mnt == mnt && p->mnt_mountpoint == dentry) in __lookup_mnt()
633 struct mount *__lookup_mnt_last(struct vfsmount *mnt, struct dentry *dentry) in __lookup_mnt_last() argument
636 p = __lookup_mnt(mnt, dentry); in __lookup_mnt_last()
639 if (!(p->mnt.mnt_flags & MNT_UMOUNT)) in __lookup_mnt_last()
642 if (&p->mnt_parent->mnt != mnt || p->mnt_mountpoint != dentry) in __lookup_mnt_last()
644 if (!(p->mnt.mnt_flags & MNT_UMOUNT)) in __lookup_mnt_last()
676 child_mnt = __lookup_mnt(path->mnt, path->dentry); in lookup_mnt()
677 m = child_mnt ? &child_mnt->mnt : NULL; in lookup_mnt()
701 struct mount *mnt; in __is_local_mountpoint() local
708 list_for_each_entry(mnt, &ns->list, mnt_list) { in __is_local_mountpoint()
709 is_covered = (mnt->mnt_mountpoint == dentry); in __is_local_mountpoint()
771 static inline int check_mnt(struct mount *mnt) in check_mnt() argument
773 return mnt->mnt_ns == current->nsproxy->mnt_ns; in check_mnt()
801 static void unhash_mnt(struct mount *mnt) in unhash_mnt() argument
803 mnt->mnt_parent = mnt; in unhash_mnt()
804 mnt->mnt_mountpoint = mnt->mnt.mnt_root; in unhash_mnt()
805 list_del_init(&mnt->mnt_child); in unhash_mnt()
806 hlist_del_init_rcu(&mnt->mnt_hash); in unhash_mnt()
807 hlist_del_init(&mnt->mnt_mp_list); in unhash_mnt()
808 put_mountpoint(mnt->mnt_mp); in unhash_mnt()
809 mnt->mnt_mp = NULL; in unhash_mnt()
815 static void detach_mnt(struct mount *mnt, struct path *old_path) in detach_mnt() argument
817 old_path->dentry = mnt->mnt_mountpoint; in detach_mnt()
818 old_path->mnt = &mnt->mnt_parent->mnt; in detach_mnt()
819 unhash_mnt(mnt); in detach_mnt()
825 static void umount_mnt(struct mount *mnt) in umount_mnt() argument
828 mnt->mnt_ex_mountpoint = mnt->mnt_mountpoint; in umount_mnt()
829 unhash_mnt(mnt); in umount_mnt()
835 void mnt_set_mountpoint(struct mount *mnt, in mnt_set_mountpoint() argument
840 mnt_add_count(mnt, 1); /* essentially, that's mntget */ in mnt_set_mountpoint()
842 child_mnt->mnt_parent = mnt; in mnt_set_mountpoint()
850 static void attach_mnt(struct mount *mnt, in attach_mnt() argument
854 mnt_set_mountpoint(parent, mp, mnt); in attach_mnt()
855 hlist_add_head_rcu(&mnt->mnt_hash, m_hash(&parent->mnt, mp->m_dentry)); in attach_mnt()
856 list_add_tail(&mnt->mnt_child, &parent->mnt_mounts); in attach_mnt()
859 static void attach_shadowed(struct mount *mnt, in attach_shadowed() argument
864 hlist_add_behind_rcu(&mnt->mnt_hash, &shadows->mnt_hash); in attach_shadowed()
865 list_add(&mnt->mnt_child, &shadows->mnt_child); in attach_shadowed()
867 hlist_add_head_rcu(&mnt->mnt_hash, in attach_shadowed()
868 m_hash(&parent->mnt, mnt->mnt_mountpoint)); in attach_shadowed()
869 list_add_tail(&mnt->mnt_child, &parent->mnt_mounts); in attach_shadowed()
876 static void commit_tree(struct mount *mnt, struct mount *shadows) in commit_tree() argument
878 struct mount *parent = mnt->mnt_parent; in commit_tree()
883 BUG_ON(parent == mnt); in commit_tree()
885 list_add_tail(&head, &mnt->mnt_list); in commit_tree()
891 attach_shadowed(mnt, parent, shadows); in commit_tree()
924 struct mount *mnt; in vfs_kern_mount() local
930 mnt = alloc_vfsmnt(name); in vfs_kern_mount()
931 if (!mnt) in vfs_kern_mount()
935 mnt->mnt.mnt_flags = MNT_INTERNAL; in vfs_kern_mount()
939 mnt_free_id(mnt); in vfs_kern_mount()
940 free_vfsmnt(mnt); in vfs_kern_mount()
944 mnt->mnt.mnt_root = root; in vfs_kern_mount()
945 mnt->mnt.mnt_sb = root->d_sb; in vfs_kern_mount()
946 mnt->mnt_mountpoint = mnt->mnt.mnt_root; in vfs_kern_mount()
947 mnt->mnt_parent = mnt; in vfs_kern_mount()
949 list_add_tail(&mnt->mnt_instance, &root->d_sb->s_mounts); in vfs_kern_mount()
951 return &mnt->mnt; in vfs_kern_mount()
958 struct super_block *sb = old->mnt.mnt_sb; in clone_mnt()
959 struct mount *mnt; in clone_mnt() local
962 mnt = alloc_vfsmnt(old->mnt_devname); in clone_mnt()
963 if (!mnt) in clone_mnt()
967 mnt->mnt_group_id = 0; /* not a peer of original */ in clone_mnt()
969 mnt->mnt_group_id = old->mnt_group_id; in clone_mnt()
971 if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) { in clone_mnt()
972 err = mnt_alloc_group_id(mnt); in clone_mnt()
977 mnt->mnt.mnt_flags = old->mnt.mnt_flags & ~(MNT_WRITE_HOLD|MNT_MARKED); in clone_mnt()
980 mnt->mnt.mnt_flags |= MNT_LOCK_ATIME; in clone_mnt()
982 if (mnt->mnt.mnt_flags & MNT_READONLY) in clone_mnt()
983 mnt->mnt.mnt_flags |= MNT_LOCK_READONLY; in clone_mnt()
985 if (mnt->mnt.mnt_flags & MNT_NODEV) in clone_mnt()
986 mnt->mnt.mnt_flags |= MNT_LOCK_NODEV; in clone_mnt()
988 if (mnt->mnt.mnt_flags & MNT_NOSUID) in clone_mnt()
989 mnt->mnt.mnt_flags |= MNT_LOCK_NOSUID; in clone_mnt()
991 if (mnt->mnt.mnt_flags & MNT_NOEXEC) in clone_mnt()
992 mnt->mnt.mnt_flags |= MNT_LOCK_NOEXEC; in clone_mnt()
998 mnt->mnt.mnt_flags |= MNT_LOCKED; in clone_mnt()
1001 mnt->mnt.mnt_sb = sb; in clone_mnt()
1002 mnt->mnt.mnt_root = dget(root); in clone_mnt()
1003 mnt->mnt_mountpoint = mnt->mnt.mnt_root; in clone_mnt()
1004 mnt->mnt_parent = mnt; in clone_mnt()
1006 list_add_tail(&mnt->mnt_instance, &sb->s_mounts); in clone_mnt()
1011 list_add(&mnt->mnt_slave, &old->mnt_slave_list); in clone_mnt()
1012 mnt->mnt_master = old; in clone_mnt()
1013 CLEAR_MNT_SHARED(mnt); in clone_mnt()
1016 list_add(&mnt->mnt_share, &old->mnt_share); in clone_mnt()
1018 list_add(&mnt->mnt_slave, &old->mnt_slave); in clone_mnt()
1019 mnt->mnt_master = old->mnt_master; in clone_mnt()
1022 set_mnt_shared(mnt); in clone_mnt()
1028 list_add(&mnt->mnt_expire, &old->mnt_expire); in clone_mnt()
1031 return mnt; in clone_mnt()
1034 mnt_free_id(mnt); in clone_mnt()
1035 free_vfsmnt(mnt); in clone_mnt()
1039 static void cleanup_mnt(struct mount *mnt) in cleanup_mnt() argument
1051 WARN_ON(mnt_get_writers(mnt)); in cleanup_mnt()
1052 if (unlikely(mnt->mnt_pins.first)) in cleanup_mnt()
1053 mnt_pin_kill(mnt); in cleanup_mnt()
1054 fsnotify_vfsmount_delete(&mnt->mnt); in cleanup_mnt()
1055 dput(mnt->mnt.mnt_root); in cleanup_mnt()
1056 deactivate_super(mnt->mnt.mnt_sb); in cleanup_mnt()
1057 mnt_free_id(mnt); in cleanup_mnt()
1058 call_rcu(&mnt->mnt_rcu, delayed_free_vfsmnt); in cleanup_mnt()
1079 static void mntput_no_expire(struct mount *mnt) in mntput_no_expire() argument
1082 mnt_add_count(mnt, -1); in mntput_no_expire()
1083 if (likely(mnt->mnt_ns)) { /* shouldn't be the last one */ in mntput_no_expire()
1088 if (mnt_get_count(mnt)) { in mntput_no_expire()
1093 if (unlikely(mnt->mnt.mnt_flags & MNT_DOOMED)) { in mntput_no_expire()
1098 mnt->mnt.mnt_flags |= MNT_DOOMED; in mntput_no_expire()
1101 list_del(&mnt->mnt_instance); in mntput_no_expire()
1103 if (unlikely(!list_empty(&mnt->mnt_mounts))) { in mntput_no_expire()
1105 list_for_each_entry_safe(p, tmp, &mnt->mnt_mounts, mnt_child) { in mntput_no_expire()
1111 if (likely(!(mnt->mnt.mnt_flags & MNT_INTERNAL))) { in mntput_no_expire()
1114 init_task_work(&mnt->mnt_rcu, __cleanup_mnt); in mntput_no_expire()
1115 if (!task_work_add(task, &mnt->mnt_rcu, true)) in mntput_no_expire()
1118 if (llist_add(&mnt->mnt_llist, &delayed_mntput_list)) in mntput_no_expire()
1122 cleanup_mnt(mnt); in mntput_no_expire()
1125 void mntput(struct vfsmount *mnt) in mntput() argument
1127 if (mnt) { in mntput()
1128 struct mount *m = real_mount(mnt); in mntput()
1137 struct vfsmount *mntget(struct vfsmount *mnt) in mntget() argument
1139 if (mnt) in mntget()
1140 mnt_add_count(real_mount(mnt), 1); in mntget()
1141 return mnt; in mntget()
1148 p = clone_mnt(real_mount(path->mnt), path->dentry, CL_PRIVATE); in mnt_clone_internal()
1151 p->mnt.mnt_flags |= MNT_INTERNAL; in mnt_clone_internal()
1152 return &p->mnt; in mnt_clone_internal()
1255 return p->show(m, &r->mnt); in m_show()
1276 struct mount *mnt = real_mount(m); in may_umount_tree() local
1284 for (p = mnt; p; p = next_mnt(p, mnt)) { in may_umount_tree()
1311 int may_umount(struct vfsmount *mnt) in may_umount() argument
1316 if (propagate_mount_busy(real_mount(mnt), 2)) in may_umount()
1354 static bool disconnect_mount(struct mount *mnt, enum umount_tree_flags how) in disconnect_mount() argument
1361 if (!mnt_has_parent(mnt)) in disconnect_mount()
1368 if (!(mnt->mnt_parent->mnt.mnt_flags & MNT_UMOUNT)) in disconnect_mount()
1376 if (IS_MNT_LOCKED(mnt)) in disconnect_mount()
1387 static void umount_tree(struct mount *mnt, enum umount_tree_flags how) in umount_tree() argument
1393 propagate_mount_unlock(mnt); in umount_tree()
1396 for (p = mnt; p; p = next_mnt(p, mnt)) { in umount_tree()
1397 p->mnt.mnt_flags |= MNT_UMOUNT; in umount_tree()
1418 p->mnt.mnt_flags |= MNT_SYNC_UMOUNT; in umount_tree()
1422 pin_insert_group(&p->mnt_umount, &p->mnt_parent->mnt, in umount_tree()
1437 static void shrink_submounts(struct mount *mnt);
1439 static int do_umount(struct mount *mnt, int flags) in do_umount() argument
1441 struct super_block *sb = mnt->mnt.mnt_sb; in do_umount()
1444 retval = security_sb_umount(&mnt->mnt, flags); in do_umount()
1455 if (&mnt->mnt == current->fs->root.mnt || in do_umount()
1464 if (mnt_get_count(mnt) != 2) { in do_umount()
1470 if (!xchg(&mnt->mnt_expiry_mark, 1)) in do_umount()
1497 if (&mnt->mnt == current->fs->root.mnt && !(flags & MNT_DETACH)) { in do_umount()
1516 if (!list_empty(&mnt->mnt_list)) in do_umount()
1517 umount_tree(mnt, UMOUNT_PROPAGATE); in do_umount()
1520 shrink_submounts(mnt); in do_umount()
1522 if (!propagate_mount_busy(mnt, 2)) { in do_umount()
1523 if (!list_empty(&mnt->mnt_list)) in do_umount()
1524 umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC); in do_umount()
1546 struct mount *mnt; in __detach_mounts() local
1555 mnt = hlist_entry(mp->m_list.first, struct mount, mnt_mp_list); in __detach_mounts()
1556 if (mnt->mnt.mnt_flags & MNT_UMOUNT) { in __detach_mounts()
1557 hlist_add_head(&mnt->mnt_umount.s_list, &unmounted); in __detach_mounts()
1558 umount_mnt(mnt); in __detach_mounts()
1560 else umount_tree(mnt, UMOUNT_CONNECTED); in __detach_mounts()
1587 struct mount *mnt; in SYSCALL_DEFINE2() local
1603 mnt = real_mount(path.mnt); in SYSCALL_DEFINE2()
1605 if (path.dentry != path.mnt->mnt_root) in SYSCALL_DEFINE2()
1607 if (!check_mnt(mnt)) in SYSCALL_DEFINE2()
1609 if (mnt->mnt.mnt_flags & MNT_LOCKED) in SYSCALL_DEFINE2()
1615 retval = do_umount(mnt, flags); in SYSCALL_DEFINE2()
1619 mntput_no_expire(mnt); in SYSCALL_DEFINE2()
1661 struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, in copy_tree() argument
1666 if (!(flag & CL_COPY_UNBINDABLE) && IS_MNT_UNBINDABLE(mnt)) in copy_tree()
1672 res = q = clone_mnt(mnt, dentry, flag); in copy_tree()
1676 q->mnt_mountpoint = mnt->mnt_mountpoint; in copy_tree()
1678 p = mnt; in copy_tree()
1679 list_for_each_entry(r, &mnt->mnt_mounts, mnt_child) { in copy_tree()
1692 is_mnt_ns_file(s->mnt.mnt_root)) { in copy_tree()
1702 q = clone_mnt(p, p->mnt.mnt_root, flag); in copy_tree()
1734 if (!check_mnt(real_mount(path->mnt))) in collect_mounts()
1737 tree = copy_tree(real_mount(path->mnt), path->dentry, in collect_mounts()
1742 return &tree->mnt; in collect_mounts()
1745 void drop_collected_mounts(struct vfsmount *mnt) in drop_collected_mounts() argument
1749 umount_tree(real_mount(mnt), UMOUNT_SYNC); in drop_collected_mounts()
1765 struct mount *old_mnt = real_mount(path->mnt); in clone_private_mount()
1777 return &new_mnt->mnt; in clone_private_mount()
1784 struct mount *mnt; in iterate_mounts() local
1788 list_for_each_entry(mnt, &real_mount(root)->mnt_list, mnt_list) { in iterate_mounts()
1789 res = f(&mnt->mnt, arg); in iterate_mounts()
1796 static void cleanup_group_ids(struct mount *mnt, struct mount *end) in cleanup_group_ids() argument
1800 for (p = mnt; p != end; p = next_mnt(p, mnt)) { in cleanup_group_ids()
1806 static int invent_group_ids(struct mount *mnt, bool recurse) in invent_group_ids() argument
1810 for (p = mnt; p; p = recurse ? next_mnt(p, mnt) : NULL) { in invent_group_ids()
1814 cleanup_group_ids(mnt, p); in invent_group_ids()
1921 q = __lookup_mnt_last(&child->mnt_parent->mnt, in attach_recursive_mnt()
1942 struct vfsmount *mnt; in lock_mount() local
1951 mnt = lookup_mnt(path); in lock_mount()
1952 if (likely(!mnt)) { in lock_mount()
1966 path->mnt = mnt; in lock_mount()
1967 dentry = path->dentry = dget(mnt->mnt_root); in lock_mount()
1979 static int graft_tree(struct mount *mnt, struct mount *p, struct mountpoint *mp) in graft_tree() argument
1981 if (mnt->mnt.mnt_sb->s_flags & MS_NOUSER) in graft_tree()
1985 d_is_dir(mnt->mnt.mnt_root)) in graft_tree()
1988 return attach_recursive_mnt(mnt, p, mp, NULL); in graft_tree()
2014 struct mount *mnt = real_mount(path->mnt); in do_change_type() local
2019 if (path->dentry != path->mnt->mnt_root) in do_change_type()
2028 err = invent_group_ids(mnt, recurse); in do_change_type()
2034 for (m = mnt; m; m = (recurse ? next_mnt(m, mnt) : NULL)) in do_change_type()
2043 static bool has_locked_children(struct mount *mnt, struct dentry *dentry) in has_locked_children() argument
2046 list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) { in has_locked_children()
2050 if (child->mnt.mnt_flags & MNT_LOCKED) in has_locked_children()
2063 struct mount *mnt = NULL, *old, *parent; in do_loopback() local
2081 old = real_mount(old_path.mnt); in do_loopback()
2082 parent = real_mount(path->mnt); in do_loopback()
2098 mnt = copy_tree(old, old_path.dentry, CL_COPY_MNT_NS_FILE); in do_loopback()
2100 mnt = clone_mnt(old, old_path.dentry, 0); in do_loopback()
2102 if (IS_ERR(mnt)) { in do_loopback()
2103 err = PTR_ERR(mnt); in do_loopback()
2107 mnt->mnt.mnt_flags &= ~MNT_LOCKED; in do_loopback()
2109 err = graft_tree(mnt, parent, mp); in do_loopback()
2112 umount_tree(mnt, UMOUNT_SYNC); in do_loopback()
2122 static int change_mount_flags(struct vfsmount *mnt, int ms_flags) in change_mount_flags() argument
2129 if (readonly_request == __mnt_is_readonly(mnt)) in change_mount_flags()
2133 error = mnt_make_readonly(real_mount(mnt)); in change_mount_flags()
2135 __mnt_unmake_readonly(real_mount(mnt)); in change_mount_flags()
2148 struct super_block *sb = path->mnt->mnt_sb; in do_remount()
2149 struct mount *mnt = real_mount(path->mnt); in do_remount() local
2151 if (!check_mnt(mnt)) in do_remount()
2154 if (path->dentry != path->mnt->mnt_root) in do_remount()
2163 if ((mnt->mnt.mnt_flags & MNT_LOCK_READONLY) && in do_remount()
2167 if ((mnt->mnt.mnt_flags & MNT_LOCK_NODEV) && in do_remount()
2170 if ((mnt->mnt_ns->user_ns != &init_user_ns) && in do_remount()
2177 if ((mnt->mnt.mnt_flags & MNT_LOCK_NOSUID) && in do_remount()
2181 if ((mnt->mnt.mnt_flags & MNT_LOCK_NOEXEC) && in do_remount()
2185 if ((mnt->mnt.mnt_flags & MNT_LOCK_ATIME) && in do_remount()
2186 ((mnt->mnt.mnt_flags & MNT_ATIME_MASK) != (mnt_flags & MNT_ATIME_MASK))) { in do_remount()
2196 err = change_mount_flags(path->mnt, flags); in do_remount()
2203 mnt_flags |= mnt->mnt.mnt_flags & ~MNT_USER_SETTABLE_MASK; in do_remount()
2204 mnt->mnt.mnt_flags = mnt_flags; in do_remount()
2205 touch_mnt_namespace(mnt->mnt_ns); in do_remount()
2212 static inline int tree_contains_unbindable(struct mount *mnt) in tree_contains_unbindable() argument
2215 for (p = mnt; p; p = next_mnt(p, mnt)) { in tree_contains_unbindable()
2240 old = real_mount(old_path.mnt); in do_move_mount()
2241 p = real_mount(path->mnt); in do_move_mount()
2247 if (old->mnt.mnt_flags & MNT_LOCKED) in do_move_mount()
2251 if (old_path.dentry != old_path.mnt->mnt_root) in do_move_mount()
2276 err = attach_recursive_mnt(old, real_mount(path->mnt), mp, &parent_path); in do_move_mount()
2292 static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype) in fs_set_subtype() argument
2304 mnt->mnt_sb->s_subtype = kstrdup(subtype, GFP_KERNEL); in fs_set_subtype()
2306 if (!mnt->mnt_sb->s_subtype) in fs_set_subtype()
2308 return mnt; in fs_set_subtype()
2311 mntput(mnt); in fs_set_subtype()
2330 parent = real_mount(path->mnt); in do_add_mount()
2343 if (path->mnt->mnt_sb == newmnt->mnt.mnt_sb && in do_add_mount()
2344 path->mnt->mnt_root == path->dentry) in do_add_mount()
2348 if (d_is_symlink(newmnt->mnt.mnt_root)) in do_add_mount()
2351 newmnt->mnt.mnt_flags = mnt_flags; in do_add_mount()
2370 struct vfsmount *mnt; in do_new_mount() local
2400 mnt = vfs_kern_mount(type, flags, name, data); in do_new_mount()
2401 if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) && in do_new_mount()
2402 !mnt->mnt_sb->s_subtype) in do_new_mount()
2403 mnt = fs_set_subtype(mnt, fstype); in do_new_mount()
2406 if (IS_ERR(mnt)) in do_new_mount()
2407 return PTR_ERR(mnt); in do_new_mount()
2409 err = do_add_mount(real_mount(mnt), path, mnt_flags); in do_new_mount()
2411 mntput(mnt); in do_new_mount()
2417 struct mount *mnt = real_mount(m); in finish_automount() local
2422 BUG_ON(mnt_get_count(mnt) < 2); in finish_automount()
2424 if (m->mnt_sb == path->mnt->mnt_sb && in finish_automount()
2430 err = do_add_mount(mnt, path, path->mnt->mnt_flags | MNT_SHRINKABLE); in finish_automount()
2435 if (!list_empty(&mnt->mnt_expire)) { in finish_automount()
2437 list_del_init(&mnt->mnt_expire); in finish_automount()
2450 void mnt_set_expiry(struct vfsmount *mnt, struct list_head *expiry_list) in mnt_set_expiry() argument
2454 list_add_tail(&real_mount(mnt)->mnt_expire, expiry_list); in mnt_set_expiry()
2467 struct mount *mnt, *next; in mark_mounts_for_expiry() local
2482 list_for_each_entry_safe(mnt, next, mounts, mnt_expire) { in mark_mounts_for_expiry()
2483 if (!xchg(&mnt->mnt_expiry_mark, 1) || in mark_mounts_for_expiry()
2484 propagate_mount_busy(mnt, 1)) in mark_mounts_for_expiry()
2486 list_move(&mnt->mnt_expire, &graveyard); in mark_mounts_for_expiry()
2489 mnt = list_first_entry(&graveyard, struct mount, mnt_expire); in mark_mounts_for_expiry()
2490 touch_mnt_namespace(mnt->mnt_ns); in mark_mounts_for_expiry()
2491 umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC); in mark_mounts_for_expiry()
2516 struct mount *mnt = list_entry(tmp, struct mount, mnt_child); in select_submounts() local
2519 if (!(mnt->mnt.mnt_flags & MNT_SHRINKABLE)) in select_submounts()
2524 if (!list_empty(&mnt->mnt_mounts)) { in select_submounts()
2525 this_parent = mnt; in select_submounts()
2529 if (!propagate_mount_busy(mnt, 1)) { in select_submounts()
2530 list_move_tail(&mnt->mnt_expire, graveyard); in select_submounts()
2551 static void shrink_submounts(struct mount *mnt) in shrink_submounts() argument
2557 while (select_submounts(mnt, &graveyard)) { in shrink_submounts()
2699 mnt_flags |= path.mnt->mnt_flags & MNT_ATIME_MASK; in do_mount()
2791 new = copy_tree(old, old->mnt.mnt_root, copy_flags); in copy_mnt_ns()
2810 if (&p->mnt == new_fs->root.mnt) { in copy_mnt_ns()
2811 new_fs->root.mnt = mntget(&q->mnt); in copy_mnt_ns()
2812 rootmnt = &p->mnt; in copy_mnt_ns()
2814 if (&p->mnt == new_fs->pwd.mnt) { in copy_mnt_ns()
2815 new_fs->pwd.mnt = mntget(&q->mnt); in copy_mnt_ns()
2816 pwdmnt = &p->mnt; in copy_mnt_ns()
2823 while (p->mnt.mnt_root != q->mnt.mnt_root) in copy_mnt_ns()
2844 struct mount *mnt = real_mount(m); in create_mnt_ns() local
2845 mnt->mnt_ns = new_ns; in create_mnt_ns()
2846 new_ns->root = mnt; in create_mnt_ns()
2847 list_add(&mnt->mnt_list, &new_ns->list); in create_mnt_ns()
2854 struct dentry *mount_subtree(struct vfsmount *mnt, const char *name) in mount_subtree() argument
2861 ns = create_mnt_ns(mnt); in mount_subtree()
2865 err = vfs_path_lookup(mnt->mnt_root, mnt, in mount_subtree()
2874 s = path.mnt->mnt_sb; in mount_subtree()
2876 mntput(path.mnt); in mount_subtree()
2923 bool is_path_reachable(struct mount *mnt, struct dentry *dentry, in is_path_reachable() argument
2926 while (&mnt->mnt != root->mnt && mnt_has_parent(mnt)) { in is_path_reachable()
2927 dentry = mnt->mnt_mountpoint; in is_path_reachable()
2928 mnt = mnt->mnt_parent; in is_path_reachable()
2930 return &mnt->mnt == root->mnt && is_subdir(dentry, root->dentry); in is_path_reachable()
2937 res = is_path_reachable(real_mount(path1->mnt), path1->dentry, path2); in path_is_under()
2998 new_mnt = real_mount(new.mnt); in SYSCALL_DEFINE2()
2999 root_mnt = real_mount(root.mnt); in SYSCALL_DEFINE2()
3000 old_mnt = real_mount(old.mnt); in SYSCALL_DEFINE2()
3007 if (new_mnt->mnt.mnt_flags & MNT_LOCKED) in SYSCALL_DEFINE2()
3016 if (root.mnt->mnt_root != root.dentry) in SYSCALL_DEFINE2()
3021 if (new.mnt->mnt_root != new.dentry) in SYSCALL_DEFINE2()
3035 if (root_mnt->mnt.mnt_flags & MNT_LOCKED) { in SYSCALL_DEFINE2()
3036 new_mnt->mnt.mnt_flags |= MNT_LOCKED; in SYSCALL_DEFINE2()
3037 root_mnt->mnt.mnt_flags &= ~MNT_LOCKED; in SYSCALL_DEFINE2()
3042 attach_mnt(new_mnt, real_mount(root_parent.mnt), root_mp); in SYSCALL_DEFINE2()
3068 struct vfsmount *mnt; in init_mount_tree() local
3076 mnt = vfs_kern_mount(type, 0, "rootfs", NULL); in init_mount_tree()
3078 if (IS_ERR(mnt)) in init_mount_tree()
3081 ns = create_mnt_ns(mnt); in init_mount_tree()
3088 root.mnt = mnt; in init_mount_tree()
3089 root.dentry = mnt->mnt_root; in init_mount_tree()
3090 mnt->mnt_flags |= MNT_LOCKED; in init_mount_tree()
3140 drop_collected_mounts(&ns->root->mnt); in put_mnt_ns()
3146 struct vfsmount *mnt; in kern_mount_data() local
3147 mnt = vfs_kern_mount(type, MS_KERNMOUNT, type->name, data); in kern_mount_data()
3148 if (!IS_ERR(mnt)) { in kern_mount_data()
3153 real_mount(mnt)->mnt_ns = MNT_NS_INTERNAL; in kern_mount_data()
3155 return mnt; in kern_mount_data()
3159 void kern_unmount(struct vfsmount *mnt) in kern_unmount() argument
3162 if (!IS_ERR_OR_NULL(mnt)) { in kern_unmount()
3163 real_mount(mnt)->mnt_ns = NULL; in kern_unmount()
3165 mntput(mnt); in kern_unmount()
3170 bool our_mnt(struct vfsmount *mnt) in our_mnt() argument
3172 return check_mnt(real_mount(mnt)); in our_mnt()
3183 ns_root.mnt = ¤t->nsproxy->mnt_ns->root->mnt; in current_chrooted()
3184 ns_root.dentry = ns_root.mnt->mnt_root; in current_chrooted()
3203 struct mount *mnt; in fs_fully_visible() local
3210 list_for_each_entry(mnt, &ns->list, mnt_list) { in fs_fully_visible()
3212 if (mnt->mnt.mnt_sb->s_type != type) in fs_fully_visible()
3218 if (mnt->mnt.mnt_root != mnt->mnt.mnt_sb->s_root) in fs_fully_visible()
3224 if ((mnt->mnt.mnt_flags & MNT_LOCK_READONLY) && in fs_fully_visible()
3227 if ((mnt->mnt.mnt_flags & MNT_LOCK_NODEV) && in fs_fully_visible()
3230 if ((mnt->mnt.mnt_flags & MNT_LOCK_ATIME) && in fs_fully_visible()
3231 ((mnt->mnt.mnt_flags & MNT_ATIME_MASK) != (new_flags & MNT_ATIME_MASK))) in fs_fully_visible()
3238 list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) { in fs_fully_visible()
3241 if (!(child->mnt.mnt_flags & MNT_LOCKED)) in fs_fully_visible()
3248 *new_mnt_flags |= mnt->mnt.mnt_flags & (MNT_LOCK_READONLY | \ in fs_fully_visible()
3300 root.mnt = &mnt_ns->root->mnt; in mntns_install()
3301 root.dentry = mnt_ns->root->mnt.mnt_root; in mntns_install()