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authorLudovic Courtès <ludo@gnu.org>2018-02-27 11:16:37 +0100
committerLudovic Courtès <ludo@gnu.org>2018-03-02 13:46:45 +0100
commit615a89e3101b1a512008a3ca3239035674c7d098 (patch)
tree40fcab5780d54b4f49ac2ef6a778808e462162b1
parent8661ad27435695ef1fbd05f6d9a01330520a3b2e (diff)
downloadpatches-615a89e3101b1a512008a3ca3239035674c7d098.tar
patches-615a89e3101b1a512008a3ca3239035674c7d098.tar.gz
linux-initrd: Separate file system module logic.
* gnu/system/linux-initrd.scm (vhash, lookup-procedure): New macros. (file-system-type-modules, file-system-modules): New procedures. (base-initrd)[cifs-modules, virtio-9p-modules]: Remove. [file-system-type-predicate]: Remove. Use 'file-system-modules' instead of 'find' + 'file-system-type-predicate'.
-rw-r--r--gnu/system/linux-initrd.scm60
1 files changed, 36 insertions, 24 deletions
diff --git a/gnu/system/linux-initrd.scm b/gnu/system/linux-initrd.scm
index 330438bce4..830445ac83 100644
--- a/gnu/system/linux-initrd.scm
+++ b/gnu/system/linux-initrd.scm
@@ -39,6 +39,7 @@
#:use-module (gnu system mapped-devices)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
+ #:use-module (ice-9 vlist)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (expression->initrd
@@ -242,6 +243,40 @@ FILE-SYSTEMS."
(list btrfs-progs/static)
'())))
+(define-syntax vhash ;TODO: factorize
+ (syntax-rules (=>)
+ "Build a vhash with the given key/value mappings."
+ ((_)
+ vlist-null)
+ ((_ (key others ... => value) rest ...)
+ (vhash-cons key value
+ (vhash (others ... => value) rest ...)))
+ ((_ (=> value) rest ...)
+ (vhash rest ...))))
+
+(define-syntax lookup-procedure
+ (syntax-rules (else)
+ "Return a procedure that lookups keys in the given dictionary."
+ ((_ mapping ... (else default))
+ (let ((table (vhash mapping ...)))
+ (lambda (key)
+ (match (vhash-assoc key table)
+ (#f default)
+ (value value)))))))
+
+(define file-system-type-modules
+ ;; Given a file system type, return the list of modules it needs.
+ (lookup-procedure ("cifs" => '("md4" "ecb" "cifs"))
+ ("9p" => '("9p" "9pnet_virtio"))
+ ("btrfs" => '("btrfs"))
+ ("iso9660" => '("isofs"))
+ (else '())))
+
+(define (file-system-modules file-systems)
+ "Return the list of Linux modules needed to mount FILE-SYSTEMS."
+ (append-map (compose file-system-type-modules file-system-type)
+ file-systems))
+
(define* (base-initrd file-systems
#:key
(linux linux-libre)
@@ -272,18 +307,6 @@ loaded at boot time in the order in which they appear."
'("virtio_pci" "virtio_balloon" "virtio_blk" "virtio_net"
"virtio_console"))
- (define cifs-modules
- ;; Modules needed to mount CIFS file systems.
- '("md4" "ecb" "cifs"))
-
- (define virtio-9p-modules
- ;; Modules for the 9p paravirtualized file system.
- '("9p" "9pnet_virtio"))
-
- (define (file-system-type-predicate type)
- (lambda (fs)
- (string=? (file-system-type fs) type)))
-
(define linux-modules
;; Modules added to the initrd and loaded from the initrd.
`("ahci" ;for SATA controllers
@@ -298,18 +321,7 @@ loaded at boot time in the order in which they appear."
,@(if (or virtio? qemu-networking?)
virtio-modules
'())
- ,@(if (find (file-system-type-predicate "cifs") file-systems)
- cifs-modules
- '())
- ,@(if (find (file-system-type-predicate "9p") file-systems)
- virtio-9p-modules
- '())
- ,@(if (find (file-system-type-predicate "btrfs") file-systems)
- '("btrfs")
- '())
- ,@(if (find (file-system-type-predicate "iso9660") file-systems)
- '("isofs")
- '())
+ ,@(file-system-modules file-systems)
,@(if volatile-root?
'("overlay")
'())