From 4b494878380920c8c7eecccd1f299164dd4a2c3f Mon Sep 17 00:00:00 2001 From: Oleg Pykhalov Date: Tue, 19 Jul 2022 19:40:28 +0300 Subject: gnu: system: file-systems: Add shared flag. * gnu/build/file-systems.scm (mount-flags->bit-mask, mount-file-system): Handle shared flag. * gnu/system/file-systems.scm (invalid-file-system-flags): Add shared to known flags. * guix/build/syscalls.scm (MS_SHARED): New variable. * doc/guix.texi (File Systems): Document shared flag. --- doc/guix.texi | 5 +++-- gnu/build/file-systems.scm | 6 ++++++ gnu/system/file-systems.scm | 4 +++- guix/build/syscalls.scm | 3 +++ 4 files changed, 15 insertions(+), 3 deletions(-) diff --git a/doc/guix.texi b/doc/guix.texi index eb3a1a4eb5..99321929cc 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -16421,8 +16421,9 @@ 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), @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). +update time on the in-memory version of the file inode), +@code{no-exec} (disallow program execution), and @code{shared} (make the +mount shared). @xref{Mount-Unmount-Remount,,, libc, The GNU C Library Reference Manual}, for more information on these flags. diff --git a/gnu/build/file-systems.scm b/gnu/build/file-systems.scm index 1d3b33e7bd..b9d46c9350 100644 --- a/gnu/build/file-systems.scm +++ b/gnu/build/file-systems.scm @@ -6,6 +6,7 @@ ;;; Copyright © 2019–2021 Tobias Geerinckx-Rice ;;; Copyright © 2019 David C. Trudgian ;;; Copyright © 2020 Maxim Cournoyer +;;; Copyright © 2022 Oleg Pykhalov ;;; ;;; This file is part of GNU Guix. ;;; @@ -1123,6 +1124,8 @@ corresponds to the symbols listed in FLAGS." (logior MS_STRICTATIME (loop rest))) (('lazy-time rest ...) (logior MS_LAZYTIME (loop rest))) + (('shared rest ...) + (loop rest)) (() 0)))) @@ -1186,6 +1189,9 @@ corresponds to the symbols listed in FLAGS." (cond ((string-prefix? "nfs" type) (mount-nfs source target type flags options)) + ((memq 'shared (file-system-flags fs)) + (mount source target type flags options) + (mount "none" target #f MS_SHARED)) (else (mount source target type flags options))) diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm index f8f4276283..464b76a2ca 100644 --- a/gnu/system/file-systems.scm +++ b/gnu/system/file-systems.scm @@ -4,6 +4,7 @@ ;;; Copyright © 2020 Jakub Kądziołka ;;; Copyright © 2020, 2021 Maxim Cournoyer ;;; Copyright © 2021 Tobias Geerinckx-Rice +;;; Copyright © 2022 Oleg Pykhalov ;;; ;;; This file is part of GNU Guix. ;;; @@ -121,7 +122,8 @@ ;; Note: Keep in sync with 'mount-flags->bit-mask'. (let ((known-flags '(read-only bind-mount no-suid no-dev no-exec - no-atime strict-atime lazy-time))) + no-atime strict-atime lazy-time + shared))) (lambda (flags) "Return the subset of FLAGS that is invalid." (remove (cut memq <> known-flags) flags)))) diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index a7401fd73f..eda487f52e 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -8,6 +8,7 @@ ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen ;;; Copyright © 2021 Chris Marusich ;;; Copyright © 2021 Tobias Geerinckx-Rice +;;; Copyright © 2022 Oleg Pykhalov ;;; ;;; This file is part of GNU Guix. ;;; @@ -49,6 +50,7 @@ MS_RELATIME MS_BIND MS_MOVE + MS_SHARED MS_LAZYTIME MNT_FORCE MNT_DETACH @@ -537,6 +539,7 @@ the last argument of `mknod'." (define MS_NOATIME 1024) (define MS_BIND 4096) (define MS_MOVE 8192) +(define MS_SHARED 1048576) (define MS_RELATIME 2097152) (define MS_STRICTATIME 16777216) (define MS_LAZYTIME 33554432) -- cgit v1.2.3