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file-systems: Add support for 'strict-atime' and 'lazy-time' flags.

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* guix/build/syscalls.scm (MS_LAZYTIME): New variable.
* gnu/build/file-systems.scm (mount-flags->bit-mask): Add match rules for
  'strict-atime' and 'lazy-time'.
* doc/guix.texi (File Systems): Add 'strict-atime' and 'lazy-time' to the list
  of supported flags.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Guillaume Le Vaillant 2019-12-03 10:31:08 +01:00 committed by Ludovic Courtès
parent 158032bd7d
commit 0dc5c85638
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GPG key ID: 090B11993D9AEBB5
3 changed files with 14 additions and 3 deletions
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9
doc/guix.texi
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@ -11244,9 +11244,12 @@ corresponding device mapping established.
This is a list of symbols denoting mount flags. Recognized flags
include @code{read-only}, @code{bind-mount}, @code{no-dev} (disallow
access to special files), @code{no-suid} (ignore setuid and setgid
bits), @code{no-atime} (do not update file access times), and @code{no-exec}
(disallow program execution). @xref{Mount-Unmount-Remount,,, libc, The GNU C
Library Reference Manual}, for more information on these flags.
bits), @code{no-atime} (do not update file access times),
@code{strict-atime} (update file access time), @code{lazy-time} (only
update time on the in-memory version of the file inode), and
@code{no-exec} (disallow program execution).
@xref{Mount-Unmount-Remount,,, libc, The GNU C Library Reference
Manual}, for more information on these flags.
@item @code{options} (default: @code{#f})
This is either @code{#f}, or a string denoting mount options passed to the

5
gnu/build/file-systems.scm
View file

@ -2,6 +2,7 @@
;;; Copyright © 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016, 2017 David Craven <david@craven.ch>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Guillaume Le Vaillant <glv@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
@ -577,6 +578,10 @@ (define (mount-flags->bit-mask flags)
(logior MS_NOEXEC (loop rest)))
(('no-atime rest ...)
(logior MS_NOATIME (loop rest)))
(('strict-atime rest ...)
(logior MS_STRICTATIME (loop rest)))
(('lazy-time rest ...)
(logior MS_LAZYTIME (loop rest)))
(()
0))))

3
guix/build/syscalls.scm
View file

@ -3,6 +3,7 @@
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Guillaume Le Vaillant <glv@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
@ -43,6 +44,7 @@ (define-module (guix build syscalls)
MS_BIND
MS_MOVE
MS_STRICTATIME
MS_LAZYTIME
MNT_FORCE
MNT_DETACH
MNT_EXPIRE
@ -451,6 +453,7 @@ (define MS_NOATIME 1024)
(define MS_BIND 4096)
(define MS_MOVE 8192)
(define MS_STRICTATIME 16777216)
(define MS_LAZYTIME 33554432)
(define MNT_FORCE 1)
(define MNT_DETACH 2)