1# SPDX-License-Identifier: GPL-2.0-only
 2config NILFS2_FS
 3	tristate "NILFS2 file system support"
 4	select BUFFER_HEAD
 5	select CRC32
 6	select LEGACY_DIRECT_IO
 7	help
 8	  NILFS2 is a log-structured file system (LFS) supporting continuous
 9	  snapshotting.  In addition to versioning capability of the entire
10	  file system, users can even restore files mistakenly overwritten or
11	  destroyed just a few seconds ago.  Since this file system can keep
12	  consistency like conventional LFS, it achieves quick recovery after
13	  system crashes.
14
15	  NILFS2 creates a number of checkpoints every few seconds or per
16	  synchronous write basis (unless there is no change).  Users can
17	  select significant versions among continuously created checkpoints,
18	  and can change them into snapshots which will be preserved for long
19	  periods until they are changed back to checkpoints.  Each
20	  snapshot is mountable as a read-only file system concurrently with
21	  its writable mount, and this feature is convenient for online backup.
22
23	  Some features including atime, extended attributes, and POSIX ACLs,
24	  are not supported yet.
25
26	  To compile this file system support as a module, choose M here: the
27	  module will be called nilfs2.  If unsure, say N.

 
 1config NILFS2_FS
 2	tristate "NILFS2 file system support"
 
 3	select CRC32
 
 4	help
 5	  NILFS2 is a log-structured file system (LFS) supporting continuous
 6	  snapshotting.  In addition to versioning capability of the entire
 7	  file system, users can even restore files mistakenly overwritten or
 8	  destroyed just a few seconds ago.  Since this file system can keep
 9	  consistency like conventional LFS, it achieves quick recovery after
10	  system crashes.
11
12	  NILFS2 creates a number of checkpoints every few seconds or per
13	  synchronous write basis (unless there is no change).  Users can
14	  select significant versions among continuously created checkpoints,
15	  and can change them into snapshots which will be preserved for long
16	  periods until they are changed back to checkpoints.  Each
17	  snapshot is mountable as a read-only file system concurrently with
18	  its writable mount, and this feature is convenient for online backup.
19
20	  Some features including atime, extended attributes, and POSIX ACLs,
21	  are not supported yet.
22
23	  To compile this file system support as a module, choose M here: the
24	  module will be called nilfs2.  If unsure, say N.