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-rw-r--r--gnu/installer/final.scm124
-rw-r--r--gnu/installer/newt/final.scm7
-rw-r--r--gnu/installer/newt/partition.scm2
-rw-r--r--gnu/installer/parted.scm24
4 files changed, 84 insertions, 73 deletions
diff --git a/gnu/installer/final.scm b/gnu/installer/final.scm
index 685aa81d89..11143b2adb 100644
--- a/gnu/installer/final.scm
+++ b/gnu/installer/final.scm
@@ -26,6 +26,8 @@
   #:use-module (guix build syscalls)
   #:use-module (guix build utils)
   #:use-module (gnu build accounts)
+  #:use-module (gnu build install)
+  #:use-module (gnu build linux-container)
   #:use-module ((gnu system shadow) #:prefix sys:)
   #:use-module (rnrs io ports)
   #:use-module (srfi srfi-1)
@@ -133,49 +135,18 @@ USERS."
                        (_ #f))))))
               pids)))
 
-(define (umount-cow-store)
-  "Remove the store overlay and the bind-mount on /tmp created by the
-cow-store service.  This procedure is very fragile and a better approach would
-be much appreciated."
-  (catch #t
-    (lambda ()
-      (let ((tmp-dir "/remove"))
-        (syslog "Unmounting cow-store.~%")
-
-        (mkdir-p tmp-dir)
-        (mount (%store-directory) tmp-dir "" MS_MOVE)
-
-        ;; The guix-daemon has possibly opened files from the cow-store,
-        ;; restart it.
-        (restart-service 'guix-daemon)
-
-        (syslog "Killing cow users.")
-
-        ;; Kill all processes started while the cow-store was active (logins
-        ;; on other TTYs for instance).
-        (kill-cow-users tmp-dir)
-
-        ;; Try to umount the store overlay. Some process such as udevd
-        ;; workers might still be active, so do some retries.
-        (let loop ((try 5))
-          (syslog "Umount try ~a~%" (- 5 try))
-          (sleep 1)
-          (let ((umounted? (false-if-exception (umount tmp-dir))))
-            (if (and (not umounted?) (> try 0))
-                (loop (- try 1))
-                (if umounted?
-                    (syslog "Umounted ~a successfully.~%" tmp-dir)
-                    (syslog "Failed to umount ~a.~%" tmp-dir)))))
-
-        (umount "/tmp")))
-    (lambda args
-      (syslog "~a~%" args))))
-
 (define* (install-system locale #:key (users '()))
   "Create /etc/shadow and /etc/passwd on the installation target for USERS.
 Start COW-STORE service on target directory and launch guix install command in
 a subshell.  LOCALE must be the locale name under which that command will run,
 or #f.  Return #t on success and #f on failure."
+  (define backing-directory
+    ;; Sub-directory used as the backing store for copy-on-write.
+    "/tmp/guix-inst")
+
+  (define (assert-exit x)
+    (primitive-exit (if x 0 1)))
+
   (let* ((options         (catch 'system-error
                             (lambda ()
                               ;; If this file exists, it can provide
@@ -188,7 +159,11 @@ or #f.  Return #t on success and #f on failure."
                                         "--fallback")
                                   options
                                   (list (%installer-configuration-file)
-                                        (%installer-target-dir)))))
+                                        (%installer-target-dir))))
+         (database-dir    "/var/guix/db")
+         (database-file   (string-append database-dir "/db.sqlite"))
+         (saved-database  (string-append database-dir "/db.save"))
+         (ret             #f))
     (mkdir-p (%installer-target-dir))
 
     ;; We want to initialize user passwords but we don't want to store them in
@@ -198,27 +173,50 @@ or #f.  Return #t on success and #f on failure."
     ;; passwords that we've put in there.
     (create-user-database users (%installer-target-dir))
 
-    (dynamic-wind
-      (lambda ()
-        (start-service 'cow-store (list (%installer-target-dir))))
-      (lambda ()
-        ;; If there are any connected clients, assume that we are running
-        ;; installation tests. In that case, dump the standard and error
-        ;; outputs to syslog.
-        (if (not (null? (current-clients)))
-            (with-output-to-file "/dev/console"
-              (lambda ()
-                (with-error-to-file "/dev/console"
-                  (lambda ()
-                    (setvbuf (current-output-port) 'none)
-                    (setvbuf (current-error-port) 'none)
-                    (run-command install-command #:locale locale)))))
-            (run-command install-command #:locale locale)))
-      (lambda ()
-        (stop-service 'cow-store)
-        ;; Remove the store overlay created at cow-store service start.
-        ;; Failing to do that will result in further umount calls to fail
-        ;; because the target device is seen as busy. See:
-        ;; https://lists.gnu.org/archive/html/guix-devel/2018-12/msg00161.html.
-        (umount-cow-store)
-        #f))))
+    ;; When the store overlay is mounted, other processes such as kmscon, udev
+    ;; and guix-daemon may open files from the store, preventing the
+    ;; underlying install support from being umounted. See:
+    ;; https://lists.gnu.org/archive/html/guix-devel/2018-12/msg00161.html.
+    ;;
+    ;; To avoid this situation, mount the store overlay inside a container,
+    ;; and run the installation from within that container.
+    (zero?
+     (call-with-container '()
+       (lambda ()
+         (dynamic-wind
+           (lambda ()
+             ;; Save the database, so that it can be restored once the
+             ;; cow-store is umounted.
+             (copy-file database-file saved-database)
+             (mount-cow-store (%installer-target-dir) backing-directory))
+           (lambda ()
+             ;; We need to drag the guix-daemon to the container MNT
+             ;; namespace, so that it can operate on the cow-store.
+             (stop-service 'guix-daemon)
+             (start-service 'guix-daemon (list (number->string (getpid))))
+
+             (setvbuf (current-output-port) 'none)
+             (setvbuf (current-error-port) 'none)
+
+             ;; If there are any connected clients, assume that we are running
+             ;; installation tests. In that case, dump the standard and error
+             ;; outputs to syslog.
+             (set! ret
+                   (if (not (null? (current-clients)))
+                       (with-output-to-file "/dev/console"
+                         (lambda ()
+                           (with-error-to-file "/dev/console"
+                             (lambda ()
+                               (run-command install-command
+                                            #:locale locale)))))
+                       (run-command install-command #:locale locale))))
+           (lambda ()
+             ;; Restart guix-daemon so that it does no keep the MNT namespace
+             ;; alive.
+             (restart-service 'guix-daemon)
+             (copy-file saved-database database-file)
+
+             ;; Finally umount the cow-store and exit the container.
+             (unmount-cow-store (%installer-target-dir) backing-directory)
+             (assert-exit ret))))
+       #:namespaces '(mnt)))))
diff --git a/gnu/installer/newt/final.scm b/gnu/installer/newt/final.scm
index fa8d6fea71..89684c4d8a 100644
--- a/gnu/installer/newt/final.scm
+++ b/gnu/installer/newt/final.scm
@@ -102,13 +102,6 @@ a specific step, or restart the installer."))
                             #:key (users '()))
   (clear-screen)
   (newt-suspend)
-  ;; XXX: Force loading 'bold' font files before mouting the
-  ;; cow-store. Otherwise, if the file is loaded by kmscon after the cow-store
-  ;; in mounted, it will be necessary to kill kmscon to umount to cow-store.
-  (display
-   (colorize-string
-    (format #f (G_ "Installing Guix System ...~%"))
-    (color BOLD)))
   (let ((install-ok? (install-system locale #:users users)))
     (newt-resume)
     install-ok?))
diff --git a/gnu/installer/newt/partition.scm b/gnu/installer/newt/partition.scm
index c925e410a9..54d595f54e 100644
--- a/gnu/installer/newt/partition.scm
+++ b/gnu/installer/newt/partition.scm
@@ -121,7 +121,7 @@ Be careful, all data on the disk will be lost.")
   (run-listbox-selection-page
    #:info-text (G_ "Please select the file-system type for this partition.")
    #:title (G_ "File-system type")
-   #:listbox-items '(ext4 btrfs fat16 fat32 jfs swap)
+   #:listbox-items '(ext4 btrfs fat16 fat32 jfs ntfs swap)
    #:listbox-item->text user-fs-type-name
    #:sort-listbox-items? #f
    #:button-text (G_ "Exit")
diff --git a/gnu/installer/parted.scm b/gnu/installer/parted.scm
index 6c805cc053..ff5f6afd19 100644
--- a/gnu/installer/parted.scm
+++ b/gnu/installer/parted.scm
@@ -222,7 +222,8 @@ inferior to MAX-SIZE, #f otherwise."
     ((btrfs) "btrfs")
     ((fat16) "fat16")
     ((fat32) "fat32")
-    ((jfs) "jfs")
+    ((jfs)   "jfs")
+    ((ntfs)  "ntfs")
     ((swap)  "linux-swap")))
 
 (define (user-fs-type->mount-type fs-type)
@@ -232,7 +233,8 @@ inferior to MAX-SIZE, #f otherwise."
     ((btrfs) "btrfs")
     ((fat16) "fat")
     ((fat32) "vfat")
-    ((jfs) "jfs")))
+    ((jfs)   "jfs")
+    ((ntfs)  "ntfs")))
 
 (define (partition-filesystem-user-type partition)
   "Return the filesystem type of PARTITION, to be stored in the FS-TYPE field
@@ -246,6 +248,7 @@ of <user-partition> record."
             ((string=? name "fat16") 'fat16)
             ((string=? name "fat32") 'fat32)
             ((string=? name "jfs") 'jfs)
+            ((string=? name "ntfs") 'ntfs)
             ((or (string=? name "swsusp")
                  (string=? name "linux-swap(v0)")
                  (string=? name "linux-swap(v1)"))
@@ -327,6 +330,11 @@ fail. See rereadpt function in wipefs.c of util-linux for an explanation."
   (device-sync device)
   (device-close device))
 
+(define (remove-logical-devices)
+  "Remove all active logical devices."
+  (with-null-output-ports
+   (invoke "dmsetup" "remove_all")))
+
 (define (non-install-devices)
   "Return all the available devices, except the busy one, allegedly the
 install device. DEVICE-IS-BUSY? is a parted call, checking if the device is
@@ -1040,6 +1048,11 @@ bit bucket."
   (with-null-output-ports
    (invoke "jfs_mkfs" "-f" partition)))
 
+(define (create-ntfs-file-system partition)
+  "Create a JFS file-system for PARTITION file-name."
+  (with-null-output-ports
+   (invoke "mkfs.ntfs" "-F" "-f" partition)))
+
 (define (create-swap-partition partition)
   "Set up swap area on PARTITION file-name."
   (with-null-output-ports
@@ -1117,6 +1130,10 @@ NEED-FORMATING? field set to #t."
           (and need-formatting?
                (not (eq? type 'extended))
                (create-jfs-file-system file-name)))
+         ((ntfs)
+          (and need-formatting?
+               (not (eq? type 'extended))
+               (create-ntfs-file-system file-name)))
          ((swap)
           (create-swap-partition file-name))
          (else
@@ -1328,6 +1345,9 @@ USER-PARTITIONS, or return nothing."
 (define (init-parted)
   "Initialize libparted support."
   (probe-all-devices!)
+  ;; Remove all logical devices, otherwise "device-is-busy?" will report true
+  ;; on all devices containaing active logical volumes.
+  (remove-logical-devices)
   (exception-set-handler (lambda (exception)
                            EXCEPTION-OPTION-UNHANDLED)))