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authorLudovic Courtès <ludo@gnu.org>2015-09-20 21:44:39 +0200
committerLudovic Courtès <ludo@gnu.org>2015-09-20 22:05:36 +0200
commitcc0e575a94a4e22a0bf2bf1b0c7b0514f1c1fbb5 (patch)
treee60e25cc56f7c12b869889ec486228656f5dd696
parent7ee5db15bfa336bb0472669b29eeb2c3b99449b8 (diff)
linux-boot: Mount /dev as a devtmpfs from the start.
Suggested by Petter <petter@mykolab.ch> and Mark H Weaver <mhw@netris.org>. Reported by Duncan Keall <duncan@duncankeall.com>. Partly fixes <http://bugs.gnu.org/19190> by populating /dev/mapper early enough. * gnu/build/linux-boot.scm (mount-essential-file-systems): Mount /dev as a devtmpfs. (move-essential-file-systems): Add /dev. (mount-root-file-system): Mount /rw-root/dev as a devtmpfs instead of calling 'make-essential-device-nodes'. (boot-system): Remove call to 'make-essential-device-nodes'. * gnu/system/file-systems.scm (%devtmpfs-file-system): Remove. * doc/guix.texi (File Systems): Adjust accordingly.
-rw-r--r--doc/guix.texi7
-rw-r--r--gnu/build/linux-boot.scm20
-rw-r--r--gnu/system/file-systems.scm15
3 files changed, 11 insertions, 31 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index cfe83909da..3ca4cefa63 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5295,16 +5295,11 @@ variables.
@defvr {Scheme Variable} %base-file-systems
These are essential file systems that are required on normal systems,
-such as @var{%devtmpfs-file-system} and @var{%immutable-store} (see
+such as @var{%pseudo-terminal-file-system} and @var{%immutable-store} (see
below.) Operating system declarations should always contain at least
these.
@end defvr
-@defvr {Scheme Variable} %devtmpfs-file-system
-The @code{devtmpfs} file system to be mounted on @file{/dev}. This is a
-requirement for udev (@pxref{Base Services, @code{udev-service}}).
-@end defvr
-
@defvr {Scheme Variable} %pseudo-terminal-file-system
This is the file system to be mounted as @file{/dev/pts}. It supports
@dfn{pseudo-terminals} created @i{via} @code{openpty} and similar
diff --git a/gnu/build/linux-boot.scm b/gnu/build/linux-boot.scm
index 3081a93a97..30d6570b04 100644
--- a/gnu/build/linux-boot.scm
+++ b/gnu/build/linux-boot.scm
@@ -48,7 +48,7 @@
;;; Code:
(define* (mount-essential-file-systems #:key (root "/"))
- "Mount /proc and /sys under ROOT."
+ "Mount /dev, /proc, and /sys under ROOT."
(define (scope dir)
(string-append root
(if (string-suffix? "/" root)
@@ -60,6 +60,10 @@
(mkdir (scope "proc")))
(mount "none" (scope "proc") "proc")
+ (unless (file-exists? (scope "dev"))
+ (mkdir (scope "dev")))
+ (mount "none" (scope "dev") "devtmpfs")
+
(unless (file-exists? (scope "sys"))
(mkdir (scope "sys")))
(mount "none" (scope "sys") "sysfs"))
@@ -71,7 +75,7 @@
(unless (file-exists? target)
(mkdir target))
(mount dir target "" MS_MOVE)))
- '("/proc" "/sys")))
+ '("/dev" "/proc" "/sys")))
(define (linux-command-line)
"Return the Linux kernel command line as a list of strings."
@@ -100,7 +104,7 @@ with the given MAJOR number, starting with MINOR."
(define* (make-essential-device-nodes #:key (root "/"))
"Make essential device nodes under ROOT/dev."
- ;; The hand-made udev!
+ ;; The hand-made devtmpfs/udev!
(define (scope dir)
(string-append root
@@ -255,7 +259,8 @@ UNIONFS."
(mount "none" "/rw-root" "tmpfs")
;; We want read-write /dev nodes.
- (make-essential-device-nodes #:root "/rw-root")
+ (mkdir-p "/rw-root/dev")
+ (mount "none" "/rw-root/dev" "devtmpfs")
;; Make /root a union of the tmpfs and the actual root. Use
;; 'max_files' to set a high RLIMIT_NOFILE for the unionfs process
@@ -385,9 +390,6 @@ to it are lost."
(unless (configure-qemu-networking)
(display "network interface is DOWN\n")))
- ;; Make /dev nodes.
- (make-essential-device-nodes)
-
;; Prepare the real root file system under /root.
(unless (file-exists? "/root")
(mkdir "/root"))
@@ -405,10 +407,6 @@ to it are lost."
#:volatile-root? volatile-root?)
(mount "none" "/root" "tmpfs"))
- (unless (file-exists? "/root/dev")
- (mkdir "/root/dev")
- (make-essential-device-nodes #:root "/root"))
-
;; Mount the specified file systems.
(for-each mount-file-system
(remove root-mount-point? mounts))
diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm
index b177f93398..8155b273e3 100644
--- a/gnu/system/file-systems.scm
+++ b/gnu/system/file-systems.scm
@@ -47,7 +47,6 @@
%binary-format-file-system
%shared-memory-file-system
%pseudo-terminal-file-system
- %devtmpfs-file-system
%immutable-store
%control-groups
%elogind-file-systems
@@ -186,17 +185,6 @@ UUID representation."
(type "binfmt_misc")
(check? #f)))
-(define %devtmpfs-file-system
- ;; /dev as a 'devtmpfs' file system, needed for udev.
- (file-system
- (device "none")
- (mount-point "/dev")
- (type "devtmpfs")
- (check? #f)
-
- ;; Mount it from the initrd so /dev/pts & co. can then be mounted over it.
- (needed-for-boot? #t)))
-
(define %tty-gid
;; ID of the 'tty' group. Allocate it statically to make it easy to refer
;; to it from here and from the 'tty' group definitions.
@@ -282,8 +270,7 @@ UUID representation."
(define %base-file-systems
;; List of basic file systems to be mounted. Note that /proc and /sys are
;; currently mounted by the initrd.
- (append (list %devtmpfs-file-system
- %pseudo-terminal-file-system
+ (append (list %pseudo-terminal-file-system
%shared-memory-file-system
%immutable-store)
%elogind-file-systems