gnu: Add NFS related services.

* gnu/services/nfs.scm (pipefs-service-type): New variable,
(gss-service-type): New variable, (idmap-service-type) New variable.

* doc/guix.texi (Network File System): New node.

1 files changed, 128 insertions, 1 deletions

diff --git a/gnu/services/nfs.scm b/gnu/services/nfs.scm
index b1e1f53fb6..8f58920e4a 100644
--- a/gnu/services/nfs.scm
+++ b/gnu/services/nfs.scm
@@ -20,11 +20,31 @@
   #:use-module (gnu)
   #:use-module (gnu services shepherd)
   #:use-module (gnu packages onc-rpc)
+  #:use-module (gnu packages linux)
   #:use-module (guix)
   #:use-module (guix records)
+  #:use-module (ice-9 match)
+  #:use-module (gnu build file-systems)
   #:export (rpcbind-service-type
             rpcbind-configuration
-            rpcbind-configuration?))
+            rpcbind-configuration?
+
+            pipefs-service-type
+            pipefs-configuration
+            pipefs-configuration?
+
+            idmap-service-type
+            idmap-configuration
+            idmap-configuration?
+
+            gss-service-type
+            gss-configuration
+            gss-configuration?))
+
+
+(define default-pipefs-directory "/var/lib/nfs/rpc_pipefs")
+
+
 
 (define-record-type* <rpcbind-configuration>
   rpcbind-configuration make-rpcbind-configuration
@@ -52,3 +72,110 @@
 
       (start #~(make-forkexec-constructor #$rpcbind-command))
       (stop #~(make-kill-destructor))))))
+
+
+
+(define-record-type* <pipefs-configuration>
+  pipefs-configuration make-pipefs-configuration
+  pipefs-configuration?
+  (mount-point           pipefs-configuration-mount-point
+                         (default default-pipefs-directory)))
+
+(define pipefs-service-type
+  (shepherd-service-type
+   'pipefs
+   (lambda (config)
+     (define pipefs-directory (pipefs-configuration-mount-point config))
+
+     (shepherd-service
+      (documentation "Mount the pipefs pseudo filesystem.")
+      (provision '(rpc-pipefs))
+
+      (start #~(lambda ()
+                 (mkdir-p #$pipefs-directory)
+                 (mount "rpc_pipefs" #$pipefs-directory "rpc_pipefs")
+                 (member #$pipefs-directory (mount-points))))
+
+      (stop #~(lambda (pid . args)
+                (umount #$pipefs-directory MNT_DETACH)
+                (not (member #$pipefs-directory (mount-points)))))))))
+
+
+
+(define-record-type* <gss-configuration>
+  gss-configuration make-gss-configuration
+  gss-configuration?
+  (pipefs-directory            gss-configuration-pipefs-directory
+                         (default default-pipefs-directory))
+  (nfs-utils             gss-configuration-gss
+                         (default nfs-utils)))
+
+(define gss-service-type
+  (shepherd-service-type
+   'gss
+   (lambda (config)
+     (define nfs-utils
+       (gss-configuration-gss config))
+
+     (define pipefs-directory
+       (gss-configuration-pipefs-directory config))
+
+     (define gss-command
+       #~(list (string-append #$nfs-utils "/sbin/rpc.gssd") "-f"
+               "-p" #$pipefs-directory))
+
+     (shepherd-service
+      (documentation "Start the RPC GSS daemon.")
+      (requirement '(rpcbind-daemon rpc-pipefs))
+      (provision '(gss-daemon))
+
+      (start #~(make-forkexec-constructor #$gss-command))
+      (stop #~(make-kill-destructor))))))
+
+
+
+(define-record-type* <idmap-configuration>
+  idmap-configuration make-idmap-configuration
+  idmap-configuration?
+  (pipefs-directory            idmap-configuration-pipefs-directory
+                         (default default-pipefs-directory))
+  (domain                idmap-configuration-domain
+                           (default #f))
+  (nfs-utils             idmap-configuration-idmap
+                         (default nfs-utils)))
+
+(define idmap-service-type
+  (shepherd-service-type
+   'idmap
+   (lambda (config)
+
+     (define nfs-utils
+       (idmap-configuration-idmap config))
+
+     (define pipefs-directory
+       (idmap-configuration-pipefs-directory config))
+
+     (define domain (idmap-configuration-domain config))
+
+     (define (idmap-config-file config)
+       (plain-file "idmapd.conf"
+                   (string-append
+                    "\n[General]\n"
+                    (if domain
+                        (format #f "Domain = ~a\n" domain))
+                    "\n[Mapping]\n"
+                    "Nobody-User = nobody\n"
+                    "Nobody-Group = nogroup\n")))
+
+     (define idmap-command
+       #~(list (string-append #$nfs-utils "/sbin/rpc.idmapd") "-f"
+               "-p" #$pipefs-directory
+               "-c" #$(idmap-config-file config)))
+
+     (shepherd-service
+       (documentation "Start the RPC IDMAP daemon.")
+       (requirement '(rpcbind-daemon rpc-pipefs))
+       (provision '(idmap-daemon))
+       (start #~(make-forkexec-constructor #$idmap-command))
+       (stop #~(make-kill-destructor))))))
+