Pull move_mount updates from Christian Brauner: "This contains an extension to the move_mount() syscall making it possible to add a single private mount into an existing propagation tree. The use-case comes from the criu folks which have been struggling with restoring complex mount trees for a long time. Variations of this work have been discussed at Plumbers before, e.g. https://www.linuxplumbersconf.org/event/7/contributions/640/ The extension to move_mount() enables criu to restore any set of mount namespaces, mount trees and sharing group trees without introducing yet more complexity into mount propagation itself. The changes required to criu to make use of this and restore complex propagation trees are available at https://github.com/Snorch/criu/commits/mount-v2-poc A cleaned-up version of this will go up for merging into the main criu repo after this lands" * tag 'fs.move_mount.move_mount_set_group.v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: tests: add move_mount(MOVE_MOUNT_SET_GROUP) selftest move_mount: allow to add a mount into an existing group
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| @@ -73,7 +73,8 @@ · 72 unmodified lines | |||
| 73 | #define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */ | 73 | #define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */ |
| 74 | #define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */ | 74 | #define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */ |
| 75 | #define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */ | 75 | #define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */ |
| 76 | #define MOVE_MOUNT__MASK 0x00000077 | 76 | #define MOVE_MOUNT_SET_GROUP 0x00000100 /* Set sharing group instead */ |
| 77 | #define MOVE_MOUNT__MASK 0x00000177 | ||
| 77 | 78 | ||
| 78 | /* | 79 | /* |
| 79 | * fsopen() flags. | 80 | * fsopen() flags. |