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()
629 struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry) in __lookup_mnt() argument
631 struct hlist_head *head = m_hash(mnt, dentry); in __lookup_mnt()
635 if (&p->mnt_parent->mnt == mnt && p->mnt_mountpoint == dentry) in __lookup_mnt()
644 struct mount *__lookup_mnt_last(struct vfsmount *mnt, struct dentry *dentry) in __lookup_mnt_last() argument
647 p = __lookup_mnt(mnt, dentry); in __lookup_mnt_last()
650 if (!(p->mnt.mnt_flags & MNT_UMOUNT)) in __lookup_mnt_last()
653 if (&p->mnt_parent->mnt != mnt || p->mnt_mountpoint != dentry) in __lookup_mnt_last()
655 if (!(p->mnt.mnt_flags & MNT_UMOUNT)) in __lookup_mnt_last()
687 child_mnt = __lookup_mnt(path->mnt, path->dentry); in lookup_mnt()
688 m = child_mnt ? &child_mnt->mnt : NULL; in lookup_mnt()
712 struct mount *mnt; in __is_local_mountpoint() local
719 list_for_each_entry(mnt, &ns->list, mnt_list) { in __is_local_mountpoint()
720 is_covered = (mnt->mnt_mountpoint == dentry); in __is_local_mountpoint()
782 static inline int check_mnt(struct mount *mnt) in check_mnt() argument
784 return mnt->mnt_ns == current->nsproxy->mnt_ns; in check_mnt()
812 static void unhash_mnt(struct mount *mnt) in unhash_mnt() argument
814 mnt->mnt_parent = mnt; in unhash_mnt()
815 mnt->mnt_mountpoint = mnt->mnt.mnt_root; in unhash_mnt()
816 list_del_init(&mnt->mnt_child); in unhash_mnt()
817 hlist_del_init_rcu(&mnt->mnt_hash); in unhash_mnt()
818 hlist_del_init(&mnt->mnt_mp_list); in unhash_mnt()
819 put_mountpoint(mnt->mnt_mp); in unhash_mnt()
820 mnt->mnt_mp = NULL; in unhash_mnt()
826 static void detach_mnt(struct mount *mnt, struct path *old_path) in detach_mnt() argument
828 old_path->dentry = mnt->mnt_mountpoint; in detach_mnt()
829 old_path->mnt = &mnt->mnt_parent->mnt; in detach_mnt()
830 unhash_mnt(mnt); in detach_mnt()
836 static void umount_mnt(struct mount *mnt) in umount_mnt() argument
839 mnt->mnt_ex_mountpoint = mnt->mnt_mountpoint; in umount_mnt()
840 unhash_mnt(mnt); in umount_mnt()
846 void mnt_set_mountpoint(struct mount *mnt, in mnt_set_mountpoint() argument
851 mnt_add_count(mnt, 1); /* essentially, that's mntget */ in mnt_set_mountpoint()
853 child_mnt->mnt_parent = mnt; in mnt_set_mountpoint()
861 static void attach_mnt(struct mount *mnt, in attach_mnt() argument
865 mnt_set_mountpoint(parent, mp, mnt); in attach_mnt()
866 hlist_add_head_rcu(&mnt->mnt_hash, m_hash(&parent->mnt, mp->m_dentry)); in attach_mnt()
867 list_add_tail(&mnt->mnt_child, &parent->mnt_mounts); in attach_mnt()
870 static void attach_shadowed(struct mount *mnt, in attach_shadowed() argument
875 hlist_add_behind_rcu(&mnt->mnt_hash, &shadows->mnt_hash); in attach_shadowed()
876 list_add(&mnt->mnt_child, &shadows->mnt_child); in attach_shadowed()
878 hlist_add_head_rcu(&mnt->mnt_hash, in attach_shadowed()
879 m_hash(&parent->mnt, mnt->mnt_mountpoint)); in attach_shadowed()
880 list_add_tail(&mnt->mnt_child, &parent->mnt_mounts); in attach_shadowed()
887 static void commit_tree(struct mount *mnt, struct mount *shadows) in commit_tree() argument
889 struct mount *parent = mnt->mnt_parent; in commit_tree()
894 BUG_ON(parent == mnt); in commit_tree()
896 list_add_tail(&head, &mnt->mnt_list); in commit_tree()
902 attach_shadowed(mnt, parent, shadows); in commit_tree()
935 struct mount *mnt; in vfs_kern_mount() local
941 mnt = alloc_vfsmnt(name); in vfs_kern_mount()
942 if (!mnt) in vfs_kern_mount()
946 mnt->mnt.mnt_flags = MNT_INTERNAL; in vfs_kern_mount()
950 mnt_free_id(mnt); in vfs_kern_mount()
951 free_vfsmnt(mnt); in vfs_kern_mount()
955 mnt->mnt.mnt_root = root; in vfs_kern_mount()
956 mnt->mnt.mnt_sb = root->d_sb; in vfs_kern_mount()
957 mnt->mnt_mountpoint = mnt->mnt.mnt_root; in vfs_kern_mount()
958 mnt->mnt_parent = mnt; in vfs_kern_mount()
960 list_add_tail(&mnt->mnt_instance, &root->d_sb->s_mounts); in vfs_kern_mount()
962 return &mnt->mnt; in vfs_kern_mount()
969 struct super_block *sb = old->mnt.mnt_sb; in clone_mnt()
970 struct mount *mnt; in clone_mnt() local
973 mnt = alloc_vfsmnt(old->mnt_devname); in clone_mnt()
974 if (!mnt) in clone_mnt()
978 mnt->mnt_group_id = 0; /* not a peer of original */ in clone_mnt()
980 mnt->mnt_group_id = old->mnt_group_id; in clone_mnt()
982 if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) { in clone_mnt()
983 err = mnt_alloc_group_id(mnt); in clone_mnt()
988 mnt->mnt.mnt_flags = old->mnt.mnt_flags & ~(MNT_WRITE_HOLD|MNT_MARKED); in clone_mnt()
991 mnt->mnt.mnt_flags |= MNT_LOCK_ATIME; in clone_mnt()
993 if (mnt->mnt.mnt_flags & MNT_READONLY) in clone_mnt()
994 mnt->mnt.mnt_flags |= MNT_LOCK_READONLY; in clone_mnt()
996 if (mnt->mnt.mnt_flags & MNT_NODEV) in clone_mnt()
997 mnt->mnt.mnt_flags |= MNT_LOCK_NODEV; in clone_mnt()
999 if (mnt->mnt.mnt_flags & MNT_NOSUID) in clone_mnt()
1000 mnt->mnt.mnt_flags |= MNT_LOCK_NOSUID; in clone_mnt()
1002 if (mnt->mnt.mnt_flags & MNT_NOEXEC) in clone_mnt()
1003 mnt->mnt.mnt_flags |= MNT_LOCK_NOEXEC; in clone_mnt()
1009 mnt->mnt.mnt_flags |= MNT_LOCKED; in clone_mnt()
1012 mnt->mnt.mnt_sb = sb; in clone_mnt()
1013 mnt->mnt.mnt_root = dget(root); in clone_mnt()
1014 mnt->mnt_mountpoint = mnt->mnt.mnt_root; in clone_mnt()
1015 mnt->mnt_parent = mnt; in clone_mnt()
1017 list_add_tail(&mnt->mnt_instance, &sb->s_mounts); in clone_mnt()
1022 list_add(&mnt->mnt_slave, &old->mnt_slave_list); in clone_mnt()
1023 mnt->mnt_master = old; in clone_mnt()
1024 CLEAR_MNT_SHARED(mnt); in clone_mnt()
1027 list_add(&mnt->mnt_share, &old->mnt_share); in clone_mnt()
1029 list_add(&mnt->mnt_slave, &old->mnt_slave); in clone_mnt()
1030 mnt->mnt_master = old->mnt_master; in clone_mnt()
1033 set_mnt_shared(mnt); in clone_mnt()
1039 list_add(&mnt->mnt_expire, &old->mnt_expire); in clone_mnt()
1042 return mnt; in clone_mnt()
1045 mnt_free_id(mnt); in clone_mnt()
1046 free_vfsmnt(mnt); in clone_mnt()
1050 static void cleanup_mnt(struct mount *mnt) in cleanup_mnt() argument
1062 WARN_ON(mnt_get_writers(mnt)); in cleanup_mnt()
1063 if (unlikely(mnt->mnt_pins.first)) in cleanup_mnt()
1064 mnt_pin_kill(mnt); in cleanup_mnt()
1065 fsnotify_vfsmount_delete(&mnt->mnt); in cleanup_mnt()
1066 dput(mnt->mnt.mnt_root); in cleanup_mnt()
1067 deactivate_super(mnt->mnt.mnt_sb); in cleanup_mnt()
1068 mnt_free_id(mnt); in cleanup_mnt()
1069 call_rcu(&mnt->mnt_rcu, delayed_free_vfsmnt); in cleanup_mnt()
1090 static void mntput_no_expire(struct mount *mnt) in mntput_no_expire() argument
1093 mnt_add_count(mnt, -1); in mntput_no_expire()
1094 if (likely(mnt->mnt_ns)) { /* shouldn't be the last one */ in mntput_no_expire()
1099 if (mnt_get_count(mnt)) { in mntput_no_expire()
1104 if (unlikely(mnt->mnt.mnt_flags & MNT_DOOMED)) { in mntput_no_expire()
1109 mnt->mnt.mnt_flags |= MNT_DOOMED; in mntput_no_expire()
1112 list_del(&mnt->mnt_instance); in mntput_no_expire()
1114 if (unlikely(!list_empty(&mnt->mnt_mounts))) { in mntput_no_expire()
1116 list_for_each_entry_safe(p, tmp, &mnt->mnt_mounts, mnt_child) { in mntput_no_expire()
1122 if (likely(!(mnt->mnt.mnt_flags & MNT_INTERNAL))) { in mntput_no_expire()
1125 init_task_work(&mnt->mnt_rcu, __cleanup_mnt); in mntput_no_expire()
1126 if (!task_work_add(task, &mnt->mnt_rcu, true)) in mntput_no_expire()
1129 if (llist_add(&mnt->mnt_llist, &delayed_mntput_list)) in mntput_no_expire()
1133 cleanup_mnt(mnt); in mntput_no_expire()
1136 void mntput(struct vfsmount *mnt) in mntput() argument
1138 if (mnt) { in mntput()
1139 struct mount *m = real_mount(mnt); in mntput()
1148 struct vfsmount *mntget(struct vfsmount *mnt) in mntget() argument
1150 if (mnt) in mntget()
1151 mnt_add_count(real_mount(mnt), 1); in mntget()
1152 return mnt; in mntget()
1159 p = clone_mnt(real_mount(path->mnt), path->dentry, CL_PRIVATE); in mnt_clone_internal()
1162 p->mnt.mnt_flags |= MNT_INTERNAL; in mnt_clone_internal()
1163 return &p->mnt; in mnt_clone_internal()
1266 return p->show(m, &r->mnt); in m_show()
1287 struct mount *mnt = real_mount(m); in may_umount_tree() local
1295 for (p = mnt; p; p = next_mnt(p, mnt)) { in may_umount_tree()
1322 int may_umount(struct vfsmount *mnt) in may_umount() argument
1327 if (propagate_mount_busy(real_mount(mnt), 2)) in may_umount()
1365 static bool disconnect_mount(struct mount *mnt, enum umount_tree_flags how) in disconnect_mount() argument
1372 if (!mnt_has_parent(mnt)) in disconnect_mount()
1379 if (!(mnt->mnt_parent->mnt.mnt_flags & MNT_UMOUNT)) in disconnect_mount()
1387 if (IS_MNT_LOCKED(mnt)) in disconnect_mount()
1398 static void umount_tree(struct mount *mnt, enum umount_tree_flags how) in umount_tree() argument
1404 propagate_mount_unlock(mnt); in umount_tree()
1407 for (p = mnt; p; p = next_mnt(p, mnt)) { in umount_tree()
1408 p->mnt.mnt_flags |= MNT_UMOUNT; in umount_tree()
1429 p->mnt.mnt_flags |= MNT_SYNC_UMOUNT; in umount_tree()
1433 pin_insert_group(&p->mnt_umount, &p->mnt_parent->mnt, in umount_tree()
1448 static void shrink_submounts(struct mount *mnt);
1450 static int do_umount(struct mount *mnt, int flags) in do_umount() argument
1452 struct super_block *sb = mnt->mnt.mnt_sb; in do_umount()
1455 retval = security_sb_umount(&mnt->mnt, flags); in do_umount()
1466 if (&mnt->mnt == current->fs->root.mnt || in do_umount()
1475 if (mnt_get_count(mnt) != 2) { in do_umount()
1481 if (!xchg(&mnt->mnt_expiry_mark, 1)) in do_umount()
1508 if (&mnt->mnt == current->fs->root.mnt && !(flags & MNT_DETACH)) { in do_umount()
1527 if (!list_empty(&mnt->mnt_list)) in do_umount()
1528 umount_tree(mnt, UMOUNT_PROPAGATE); in do_umount()
1531 shrink_submounts(mnt); in do_umount()
1533 if (!propagate_mount_busy(mnt, 2)) { in do_umount()
1534 if (!list_empty(&mnt->mnt_list)) in do_umount()
1535 umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC); in do_umount()
1557 struct mount *mnt; in __detach_mounts() local
1566 mnt = hlist_entry(mp->m_list.first, struct mount, mnt_mp_list); in __detach_mounts()
1567 if (mnt->mnt.mnt_flags & MNT_UMOUNT) { in __detach_mounts()
1568 hlist_add_head(&mnt->mnt_umount.s_list, &unmounted); in __detach_mounts()
1569 umount_mnt(mnt); in __detach_mounts()
1571 else umount_tree(mnt, UMOUNT_CONNECTED); in __detach_mounts()
1598 struct mount *mnt; in SYSCALL_DEFINE2() local
1614 mnt = real_mount(path.mnt); in SYSCALL_DEFINE2()
1616 if (path.dentry != path.mnt->mnt_root) in SYSCALL_DEFINE2()
1618 if (!check_mnt(mnt)) in SYSCALL_DEFINE2()
1620 if (mnt->mnt.mnt_flags & MNT_LOCKED) in SYSCALL_DEFINE2()
1626 retval = do_umount(mnt, flags); in SYSCALL_DEFINE2()
1630 mntput_no_expire(mnt); in SYSCALL_DEFINE2()
1672 struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, in copy_tree() argument
1677 if (!(flag & CL_COPY_UNBINDABLE) && IS_MNT_UNBINDABLE(mnt)) in copy_tree()
1683 res = q = clone_mnt(mnt, dentry, flag); in copy_tree()
1687 q->mnt_mountpoint = mnt->mnt_mountpoint; in copy_tree()
1689 p = mnt; in copy_tree()
1690 list_for_each_entry(r, &mnt->mnt_mounts, mnt_child) { in copy_tree()
1703 is_mnt_ns_file(s->mnt.mnt_root)) { in copy_tree()
1713 q = clone_mnt(p, p->mnt.mnt_root, flag); in copy_tree()
1745 if (!check_mnt(real_mount(path->mnt))) in collect_mounts()
1748 tree = copy_tree(real_mount(path->mnt), path->dentry, in collect_mounts()
1753 return &tree->mnt; in collect_mounts()
1756 void drop_collected_mounts(struct vfsmount *mnt) in drop_collected_mounts() argument
1760 umount_tree(real_mount(mnt), UMOUNT_SYNC); in drop_collected_mounts()
1776 struct mount *old_mnt = real_mount(path->mnt); in clone_private_mount()
1788 return &new_mnt->mnt; in clone_private_mount()
1795 struct mount *mnt; in iterate_mounts() local
1799 list_for_each_entry(mnt, &real_mount(root)->mnt_list, mnt_list) { in iterate_mounts()
1800 res = f(&mnt->mnt, arg); in iterate_mounts()
1807 static void cleanup_group_ids(struct mount *mnt, struct mount *end) in cleanup_group_ids() argument
1811 for (p = mnt; p != end; p = next_mnt(p, mnt)) { in cleanup_group_ids()
1817 static int invent_group_ids(struct mount *mnt, bool recurse) in invent_group_ids() argument
1821 for (p = mnt; p; p = recurse ? next_mnt(p, mnt) : NULL) { in invent_group_ids()
1825 cleanup_group_ids(mnt, p); in invent_group_ids()
1932 q = __lookup_mnt_last(&child->mnt_parent->mnt, in attach_recursive_mnt()
1953 struct vfsmount *mnt; in lock_mount() local
1962 mnt = lookup_mnt(path); in lock_mount()
1963 if (likely(!mnt)) { in lock_mount()
1977 path->mnt = mnt; in lock_mount()
1978 dentry = path->dentry = dget(mnt->mnt_root); in lock_mount()
1990 static int graft_tree(struct mount *mnt, struct mount *p, struct mountpoint *mp) in graft_tree() argument
1992 if (mnt->mnt.mnt_sb->s_flags & MS_NOUSER) in graft_tree()
1996 d_is_dir(mnt->mnt.mnt_root)) in graft_tree()
1999 return attach_recursive_mnt(mnt, p, mp, NULL); in graft_tree()
2025 struct mount *mnt = real_mount(path->mnt); in do_change_type() local
2030 if (path->dentry != path->mnt->mnt_root) in do_change_type()
2039 err = invent_group_ids(mnt, recurse); in do_change_type()
2045 for (m = mnt; m; m = (recurse ? next_mnt(m, mnt) : NULL)) in do_change_type()
2054 static bool has_locked_children(struct mount *mnt, struct dentry *dentry) in has_locked_children() argument
2057 list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) { in has_locked_children()
2061 if (child->mnt.mnt_flags & MNT_LOCKED) in has_locked_children()
2074 struct mount *mnt = NULL, *old, *parent; in do_loopback() local
2092 old = real_mount(old_path.mnt); in do_loopback()
2093 parent = real_mount(path->mnt); in do_loopback()
2109 mnt = copy_tree(old, old_path.dentry, CL_COPY_MNT_NS_FILE); in do_loopback()
2111 mnt = clone_mnt(old, old_path.dentry, 0); in do_loopback()
2113 if (IS_ERR(mnt)) { in do_loopback()
2114 err = PTR_ERR(mnt); in do_loopback()
2118 mnt->mnt.mnt_flags &= ~MNT_LOCKED; in do_loopback()
2120 err = graft_tree(mnt, parent, mp); in do_loopback()
2123 umount_tree(mnt, UMOUNT_SYNC); in do_loopback()
2133 static int change_mount_flags(struct vfsmount *mnt, int ms_flags) in change_mount_flags() argument
2140 if (readonly_request == __mnt_is_readonly(mnt)) in change_mount_flags()
2144 error = mnt_make_readonly(real_mount(mnt)); in change_mount_flags()
2146 __mnt_unmake_readonly(real_mount(mnt)); in change_mount_flags()
2159 struct super_block *sb = path->mnt->mnt_sb; in do_remount()
2160 struct mount *mnt = real_mount(path->mnt); in do_remount() local
2162 if (!check_mnt(mnt)) in do_remount()
2165 if (path->dentry != path->mnt->mnt_root) in do_remount()
2174 if ((mnt->mnt.mnt_flags & MNT_LOCK_READONLY) && in do_remount()
2178 if ((mnt->mnt.mnt_flags & MNT_LOCK_NODEV) && in do_remount()
2181 if ((mnt->mnt_ns->user_ns != &init_user_ns) && in do_remount()
2188 if ((mnt->mnt.mnt_flags & MNT_LOCK_NOSUID) && in do_remount()
2192 if ((mnt->mnt.mnt_flags & MNT_LOCK_NOEXEC) && in do_remount()
2196 if ((mnt->mnt.mnt_flags & MNT_LOCK_ATIME) && in do_remount()
2197 ((mnt->mnt.mnt_flags & MNT_ATIME_MASK) != (mnt_flags & MNT_ATIME_MASK))) { in do_remount()
2207 err = change_mount_flags(path->mnt, flags); in do_remount()
2214 mnt_flags |= mnt->mnt.mnt_flags & ~MNT_USER_SETTABLE_MASK; in do_remount()
2215 mnt->mnt.mnt_flags = mnt_flags; in do_remount()
2216 touch_mnt_namespace(mnt->mnt_ns); in do_remount()
2223 static inline int tree_contains_unbindable(struct mount *mnt) in tree_contains_unbindable() argument
2226 for (p = mnt; p; p = next_mnt(p, mnt)) { in tree_contains_unbindable()
2251 old = real_mount(old_path.mnt); in do_move_mount()
2252 p = real_mount(path->mnt); in do_move_mount()
2258 if (old->mnt.mnt_flags & MNT_LOCKED) in do_move_mount()
2262 if (old_path.dentry != old_path.mnt->mnt_root) in do_move_mount()
2287 err = attach_recursive_mnt(old, real_mount(path->mnt), mp, &parent_path); in do_move_mount()
2303 static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype) in fs_set_subtype() argument
2315 mnt->mnt_sb->s_subtype = kstrdup(subtype, GFP_KERNEL); in fs_set_subtype()
2317 if (!mnt->mnt_sb->s_subtype) in fs_set_subtype()
2319 return mnt; in fs_set_subtype()
2322 mntput(mnt); in fs_set_subtype()
2341 parent = real_mount(path->mnt); in do_add_mount()
2354 if (path->mnt->mnt_sb == newmnt->mnt.mnt_sb && in do_add_mount()
2355 path->mnt->mnt_root == path->dentry) in do_add_mount()
2359 if (d_is_symlink(newmnt->mnt.mnt_root)) in do_add_mount()
2362 newmnt->mnt.mnt_flags = mnt_flags; in do_add_mount()
2381 struct vfsmount *mnt; in do_new_mount() local
2409 mnt = vfs_kern_mount(type, flags, name, data); in do_new_mount()
2410 if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) && in do_new_mount()
2411 !mnt->mnt_sb->s_subtype) in do_new_mount()
2412 mnt = fs_set_subtype(mnt, fstype); in do_new_mount()
2415 if (IS_ERR(mnt)) in do_new_mount()
2416 return PTR_ERR(mnt); in do_new_mount()
2418 err = do_add_mount(real_mount(mnt), path, mnt_flags); in do_new_mount()
2420 mntput(mnt); in do_new_mount()
2426 struct mount *mnt = real_mount(m); in finish_automount() local
2431 BUG_ON(mnt_get_count(mnt) < 2); in finish_automount()
2433 if (m->mnt_sb == path->mnt->mnt_sb && in finish_automount()
2439 err = do_add_mount(mnt, path, path->mnt->mnt_flags | MNT_SHRINKABLE); in finish_automount()
2444 if (!list_empty(&mnt->mnt_expire)) { in finish_automount()
2446 list_del_init(&mnt->mnt_expire); in finish_automount()
2459 void mnt_set_expiry(struct vfsmount *mnt, struct list_head *expiry_list) in mnt_set_expiry() argument
2463 list_add_tail(&real_mount(mnt)->mnt_expire, expiry_list); in mnt_set_expiry()
2476 struct mount *mnt, *next; in mark_mounts_for_expiry() local
2491 list_for_each_entry_safe(mnt, next, mounts, mnt_expire) { in mark_mounts_for_expiry()
2492 if (!xchg(&mnt->mnt_expiry_mark, 1) || in mark_mounts_for_expiry()
2493 propagate_mount_busy(mnt, 1)) in mark_mounts_for_expiry()
2495 list_move(&mnt->mnt_expire, &graveyard); in mark_mounts_for_expiry()
2498 mnt = list_first_entry(&graveyard, struct mount, mnt_expire); in mark_mounts_for_expiry()
2499 touch_mnt_namespace(mnt->mnt_ns); in mark_mounts_for_expiry()
2500 umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC); in mark_mounts_for_expiry()
2525 struct mount *mnt = list_entry(tmp, struct mount, mnt_child); in select_submounts() local
2528 if (!(mnt->mnt.mnt_flags & MNT_SHRINKABLE)) in select_submounts()
2533 if (!list_empty(&mnt->mnt_mounts)) { in select_submounts()
2534 this_parent = mnt; in select_submounts()
2538 if (!propagate_mount_busy(mnt, 1)) { in select_submounts()
2539 list_move_tail(&mnt->mnt_expire, graveyard); in select_submounts()
2560 static void shrink_submounts(struct mount *mnt) in shrink_submounts() argument
2566 while (select_submounts(mnt, &graveyard)) { in shrink_submounts()
2708 mnt_flags |= path.mnt->mnt_flags & MNT_ATIME_MASK; in do_mount()
2800 new = copy_tree(old, old->mnt.mnt_root, copy_flags); in copy_mnt_ns()
2819 if (&p->mnt == new_fs->root.mnt) { in copy_mnt_ns()
2820 new_fs->root.mnt = mntget(&q->mnt); in copy_mnt_ns()
2821 rootmnt = &p->mnt; in copy_mnt_ns()
2823 if (&p->mnt == new_fs->pwd.mnt) { in copy_mnt_ns()
2824 new_fs->pwd.mnt = mntget(&q->mnt); in copy_mnt_ns()
2825 pwdmnt = &p->mnt; in copy_mnt_ns()
2832 while (p->mnt.mnt_root != q->mnt.mnt_root) in copy_mnt_ns()
2853 struct mount *mnt = real_mount(m); in create_mnt_ns() local
2854 mnt->mnt_ns = new_ns; in create_mnt_ns()
2855 new_ns->root = mnt; in create_mnt_ns()
2856 list_add(&mnt->mnt_list, &new_ns->list); in create_mnt_ns()
2863 struct dentry *mount_subtree(struct vfsmount *mnt, const char *name) in mount_subtree() argument
2870 ns = create_mnt_ns(mnt); in mount_subtree()
2874 err = vfs_path_lookup(mnt->mnt_root, mnt, in mount_subtree()
2883 s = path.mnt->mnt_sb; in mount_subtree()
2885 mntput(path.mnt); in mount_subtree()
2932 bool is_path_reachable(struct mount *mnt, struct dentry *dentry, in is_path_reachable() argument
2935 while (&mnt->mnt != root->mnt && mnt_has_parent(mnt)) { in is_path_reachable()
2936 dentry = mnt->mnt_mountpoint; in is_path_reachable()
2937 mnt = mnt->mnt_parent; in is_path_reachable()
2939 return &mnt->mnt == root->mnt && is_subdir(dentry, root->dentry); in is_path_reachable()
2946 res = is_path_reachable(real_mount(path1->mnt), path1->dentry, path2); in path_is_under()
3007 new_mnt = real_mount(new.mnt); in SYSCALL_DEFINE2()
3008 root_mnt = real_mount(root.mnt); in SYSCALL_DEFINE2()
3009 old_mnt = real_mount(old.mnt); in SYSCALL_DEFINE2()
3016 if (new_mnt->mnt.mnt_flags & MNT_LOCKED) in SYSCALL_DEFINE2()
3025 if (root.mnt->mnt_root != root.dentry) in SYSCALL_DEFINE2()
3030 if (new.mnt->mnt_root != new.dentry) in SYSCALL_DEFINE2()
3044 if (root_mnt->mnt.mnt_flags & MNT_LOCKED) { in SYSCALL_DEFINE2()
3045 new_mnt->mnt.mnt_flags |= MNT_LOCKED; in SYSCALL_DEFINE2()
3046 root_mnt->mnt.mnt_flags &= ~MNT_LOCKED; in SYSCALL_DEFINE2()
3051 attach_mnt(new_mnt, real_mount(root_parent.mnt), root_mp); in SYSCALL_DEFINE2()
3077 struct vfsmount *mnt; in init_mount_tree() local
3085 mnt = vfs_kern_mount(type, 0, "rootfs", NULL); in init_mount_tree()
3087 if (IS_ERR(mnt)) in init_mount_tree()
3090 ns = create_mnt_ns(mnt); in init_mount_tree()
3097 root.mnt = mnt; in init_mount_tree()
3098 root.dentry = mnt->mnt_root; in init_mount_tree()
3099 mnt->mnt_flags |= MNT_LOCKED; in init_mount_tree()
3149 drop_collected_mounts(&ns->root->mnt); in put_mnt_ns()
3155 struct vfsmount *mnt; in kern_mount_data() local
3156 mnt = vfs_kern_mount(type, MS_KERNMOUNT, type->name, data); in kern_mount_data()
3157 if (!IS_ERR(mnt)) { in kern_mount_data()
3162 real_mount(mnt)->mnt_ns = MNT_NS_INTERNAL; in kern_mount_data()
3164 return mnt; in kern_mount_data()
3168 void kern_unmount(struct vfsmount *mnt) in kern_unmount() argument
3171 if (!IS_ERR_OR_NULL(mnt)) { in kern_unmount()
3172 real_mount(mnt)->mnt_ns = NULL; in kern_unmount()
3174 mntput(mnt); in kern_unmount()
3179 bool our_mnt(struct vfsmount *mnt) in our_mnt() argument
3181 return check_mnt(real_mount(mnt)); in our_mnt()
3192 ns_root.mnt = ¤t->nsproxy->mnt_ns->root->mnt; in current_chrooted()
3193 ns_root.dentry = ns_root.mnt->mnt_root; in current_chrooted()
3212 struct mount *mnt; in fs_fully_visible() local
3219 list_for_each_entry(mnt, &ns->list, mnt_list) { in fs_fully_visible()
3223 if (mnt->mnt.mnt_sb->s_type != type) in fs_fully_visible()
3229 if (mnt->mnt.mnt_root != mnt->mnt.mnt_sb->s_root) in fs_fully_visible()
3235 mnt_flags = mnt->mnt.mnt_flags; in fs_fully_visible()
3236 if (mnt->mnt.mnt_sb->s_iflags & SB_I_NOEXEC) in fs_fully_visible()
3262 list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) { in fs_fully_visible()
3326 root.mnt = &mnt_ns->root->mnt; in mntns_install()
3327 root.dentry = mnt_ns->root->mnt.mnt_root; in mntns_install()