Lines Matching +full:default +full:- +full:sample +full:- +full:phase
1 .. SPDX-License-Identifier: GPL-2.0
11 4) Use-case
19 -----------
27 It provides the necessary building blocks for features like per-user-namespace
31 -----------
49 mount --make-shared /mnt
51 Note: mount(8) command now supports the --make-shared flag,
52 so the sample 'smount' program is no longer needed and has been
57 # mount --bind /mnt /tmp
94 # mount --make-shared /mnt
97 # mount --bind /mnt /tmp
103 # mount --make-slave /tmp
131 This is the mount we are familiar with. Its the default type.
138 # mount --make-unbindable /mnt
142 # mount --bind /mnt /tmp
150 -----------------------
152 The mount command (util-linux package) can be used to set mount
155 mount --make-shared mountpoint
156 mount --make-slave mountpoint
157 mount --make-private mountpoint
158 mount --make-unbindable mountpoint
162 ------------
171 mount --bind /cdrom /cdrom
172 mount --make-shared /cdrom
190 mount --make-rshared /
195 mount --make-rslave /myprivatetree
206 C) Per-user namespace
224 mount --make-shared /
225 mount --rbind / /view/v1
226 mount --rbind / /view/v2
227 mount --rbind / /view/v3
228 mount --rbind / /view/v4
241 ---------------------
243 bind, rbind, move, mount, umount and clone-namespace operations.
271 mount --make-shared /mnt
272 mount --bind /mnt /tmp
290 mount --make-slave mount
304 peer group, and this peer-group is a slave of some other
310 mount --make-shared mount
331 -----------------------------------------------------------------------
332 | |make-shared | make-slave | make-private |make-unbindab|
333 --------------|------------|--------------|--------------|-------------|
336 |-------------|------------|--------------|--------------|-------------|
339 |-------------|------------|--------------|--------------|-------------|
342 |-------------|------------|--------------|--------------|-------------|
344 |-------------|------------|--------------|--------------|-------------|
346 ------------------------------------------------------------------------
352 ** slaving a non-shared mount has no effect on the mount.
362 mount --bind A/a B/b
370 --------------------------------------------------------------------------
373 |source(A)->| shared | private | slave | unbindable |
380 |non-shared| shared | private | slave | invalid |
391 'B'. And finally the peer-group of 'C' is merged with the peer group
415 5. 'A' is a private mount and 'B' is a non-shared(private or slave or
419 6. 'A' is a shared mount and 'B' is a non-shared mount. A new mount 'C'
422 peer-group of 'A'.
424 7. 'A' is a slave mount of mount 'Z' and 'B' is a non-shared mount. A
432 8. 'A' is a unbindable mount and 'B' is a non-shared mount. This is a
476 mount --move A B/b
484 ---------------------------------------------------------------------------
487 | source(A)->| shared | private | slave | unbindable |
494 |non-shared| shared | private | slave | unbindable |
534 5. 'A' is a private mount and 'B' is a non-shared(private or slave or
537 6. 'A' is a shared mount and 'B' is a non-shared mount. The mount 'A'
541 7. 'A' is a slave mount of mount 'Z' and 'B' is a non-shared mount.
545 8. 'A' is a unbindable mount and 'B' is a non-shared mount. The mount
570 If mount 'B' is shared, then all most-recently-mounted mounts at dentry
572 sub-mounts within them are unmounted.
583 if 'C1' is unmounted, all the mounts that are most-recently-mounted on
584 'B1' and on the mounts that 'B1' propagates-to are unmounted.
593 to be unmounted and 'C1' has some sub-mounts, the umount operation is
616 -------
622 mount --bind /mnt /mnt
623 mount --make-shared /mnt
624 mount --bind /mnt /tmp
625 mount --move /tmp /mnt/1
636 mount --make-rshared /
637 mkdir -p /v/1
638 mount --rbind / /v/1
647 mount --bind /mnt /mnt
648 mount --make-shared /mnt
649 mkdir -p /mnt/1/2/3 /mnt/1/test
650 mount --bind /mnt/1 /tmp
651 mount --make-slave /mnt
652 mount --make-shared /mnt
653 mount --bind /mnt/1/2 /tmp1
654 mount --make-slave /mnt
664 A -> B -> C
668 mount --bind /bin /tmp/test
678 ------
716 mount --make-shared /root
718 mkdir -p /tmp/m1
720 mount --rbind /root /tmp/m1
739 mkdir -p /tmp/m2
740 mount --rbind /root /tmp/m2
766 mkdir -p /tmp/m3
767 mount --rbind /root /tmp/m3
772 at step i the number of vfsmounts is V[i] = i*V[i-1].
795 mount --bind /root/tmp /root/tmp
797 mount --make-rshared /root
798 mount --make-unbindable /root/tmp
800 mkdir -p /tmp/m1
802 mount --rbind /root /tmp/m1
817 mkdir -p /tmp/m2
818 mount --rbind /root /tmp/m2
833 mkdir -p /tmp/m3
834 mount --rbind /root /tmp/m3
847 -----------------
853 * ->mnt_share
854 * ->mnt_slave_list
855 * ->mnt_slave
856 * ->mnt_master
858 ->mnt_share
862 ->mnt_slave_list
866 ->mnt_slave
870 ->mnt_master
874 ->mnt_flags
881 ->mnt_share.
883 All vfsmounts with the same ->mnt_master form on a cyclic list anchored
884 in ->mnt_master->mnt_slave_list and going through ->mnt_slave.
886 ->mnt_master can point to arbitrary (and possibly different) members
888 you need to go through _all_ ->mnt_slave_list of its members.
889 Conceptually it's just a single set - distribution among the
893 All vfsmounts in a peer group have the same ->mnt_master. If it is
894 non-NULL, they form a contiguous (ordered) segment of slave list.
901 A <--> B <--> C <---> D
905 E<-->K
915 A's ->mnt_share links with the ->mnt_share of 'B' 'C' and 'D'
917 A's ->mnt_slave_list links with ->mnt_slave of 'E', 'K', 'F' and 'G'
919 E's ->mnt_share links with ->mnt_share of K
921 'E', 'K', 'F', 'G' have their ->mnt_master point to struct vfsmount of 'A'
923 'M', 'L', 'N' have their ->mnt_master point to struct vfsmount of 'K'
925 K's ->mnt_slave_list links with ->mnt_slave of 'M', 'L' and 'N'
927 C's ->mnt_slave_list links with ->mnt_slave of 'J' and 'K'
929 J and K's ->mnt_master points to struct vfsmount of C
931 and finally D's ->mnt_slave_list links with ->mnt_slave of 'H' and 'I'
933 'H' and 'I' have their ->mnt_master pointing to struct vfsmount of 'D'.
940 ->mnt_share, ->mnt_slave, ->mnt_slave_list, ->mnt_master are protected
943 Normally we have ->mnt_flags modifications serialized by vfsmount_lock.
957 1. prepare phase.
961 Prepare phase:
969 However note down its ->mnt_parent and ->mnt_mountpoint
974 If this phase is successful, there should be 'n' new
976 source tree. Go to the commit phase
982 if any memory allocations fail, go to the abort phase.
984 Commit phase
988 Abort phase
995 ------------------------------------------------------------------------