mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-02 07:31:26 +00:00
362d1389d3
were redirecting output to /var/log/upstart/<job>, so it didn't work properly. * mountall-ip-up: send the USR1 signal to the mountall process by looking up its PID, rather than doing "pkill -USR1 mountall". This prevents a very subtle race condition where USR1 is delivered to a child process of mountall (such as fsck), if pkill sees the child just before its execve(). There is actually still a race condition because mountall installs its USR1 handler *after* daemonising, so mountall-ip-up could accidentally kill mountall. Should report this to upstream. svn path=/nixos/trunk/; revision=33236
278 lines
7.7 KiB
Nix
278 lines
7.7 KiB
Nix
{ config, pkgs, ... }:
|
||
|
||
with pkgs.lib;
|
||
|
||
let
|
||
|
||
fstab = pkgs.writeText "fstab"
|
||
''
|
||
# This is a generated file. Do not edit!
|
||
|
||
# Filesystems.
|
||
${flip concatMapStrings config.fileSystems (fs:
|
||
(if fs.device != null then fs.device else "/dev/disk/by-label/${fs.label}")
|
||
+ " " + fs.mountPoint
|
||
+ " " + fs.fsType
|
||
+ " " + fs.options
|
||
+ " 0"
|
||
+ " " + (if fs.fsType == "none" || fs.noCheck then "0" else
|
||
if fs.mountPoint == "/" then "1" else "2")
|
||
+ "\n"
|
||
)}
|
||
|
||
# Swap devices.
|
||
${flip concatMapStrings config.swapDevices (sw:
|
||
"${sw.device} none swap\n"
|
||
)}
|
||
'';
|
||
|
||
in
|
||
|
||
{
|
||
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
fileSystems = mkOption {
|
||
example = [
|
||
{ mountPoint = "/";
|
||
device = "/dev/hda1";
|
||
}
|
||
{ mountPoint = "/data";
|
||
device = "/dev/hda2";
|
||
fsType = "ext3";
|
||
options = "data=journal";
|
||
}
|
||
{ mountPoint = "/bigdisk";
|
||
label = "bigdisk";
|
||
}
|
||
];
|
||
|
||
description = ''
|
||
The file systems to be mounted. It must include an entry for
|
||
the root directory (<literal>mountPoint = \"/\"</literal>). Each
|
||
entry in the list is an attribute set with the following fields:
|
||
<literal>mountPoint</literal>, <literal>device</literal>,
|
||
<literal>fsType</literal> (a file system type recognised by
|
||
<command>mount</command>; defaults to
|
||
<literal>\"auto\"</literal>), and <literal>options</literal>
|
||
(the mount options passed to <command>mount</command> using the
|
||
<option>-o</option> flag; defaults to <literal>\"defaults\"</literal>).
|
||
|
||
Instead of specifying <literal>device</literal>, you can also
|
||
specify a volume label (<literal>label</literal>) for file
|
||
systems that support it, such as ext2/ext3 (see <command>mke2fs
|
||
-L</command>).
|
||
|
||
<literal>autocreate</literal> forces <literal>mountPoint</literal> to be created with
|
||
<command>mkdir -p</command> .
|
||
'';
|
||
|
||
type = types.nullOr (types.list types.optionSet);
|
||
|
||
options = {
|
||
|
||
mountPoint = mkOption {
|
||
example = "/mnt/usb";
|
||
type = types.uniq types.string;
|
||
description = "Location of the mounted the file system.";
|
||
};
|
||
|
||
device = mkOption {
|
||
default = null;
|
||
example = "/dev/sda";
|
||
type = types.uniq (types.nullOr types.string);
|
||
description = "Location of the device.";
|
||
};
|
||
|
||
label = mkOption {
|
||
default = null;
|
||
example = "root-partition";
|
||
type = types.uniq (types.nullOr types.string);
|
||
description = "Label of the device (if any).";
|
||
};
|
||
|
||
fsType = mkOption {
|
||
default = "auto";
|
||
example = "ext3";
|
||
type = types.uniq types.string;
|
||
description = "Type of the file system.";
|
||
};
|
||
|
||
options = mkOption {
|
||
default = "defaults,relatime";
|
||
example = "data=journal";
|
||
type = types.string;
|
||
merge = pkgs.lib.concatStringsSep ",";
|
||
description = "Options used to mount the file system.";
|
||
};
|
||
|
||
autocreate = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Automatically create the mount point defined in
|
||
<option>fileSystems.*.mountPoint</option>.
|
||
'';
|
||
};
|
||
|
||
noCheck = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = "Disable running fsck on this filesystem.";
|
||
};
|
||
};
|
||
};
|
||
|
||
system.fsPackages = mkOption {
|
||
internal = true;
|
||
default = [ ];
|
||
description = "Packages supplying file system mounters and checkers.";
|
||
};
|
||
|
||
boot.supportedFilesystems = mkOption {
|
||
default = [ ];
|
||
example = [ "btrfs" ];
|
||
type = types.list types.string;
|
||
description = "Names of supported filesystem types.";
|
||
};
|
||
|
||
boot.initrd.supportedFilesystems = mkOption {
|
||
default = [ ];
|
||
example = [ "btrfs" ];
|
||
type = types.list types.string;
|
||
description = "Names of supported filesystem types in the initial ramdisk.";
|
||
};
|
||
|
||
};
|
||
|
||
|
||
###### implementation
|
||
|
||
config = {
|
||
|
||
boot.supportedFilesystems =
|
||
map (fs: fs.fsType) config.fileSystems;
|
||
|
||
boot.initrd.supportedFilesystems =
|
||
map (fs: fs.fsType)
|
||
(filter (fs: fs.mountPoint == "/" || fs.neededForBoot) config.fileSystems);
|
||
|
||
# Add the mount helpers to the system path so that `mount' can find them.
|
||
system.fsPackages = [ pkgs.dosfstools ];
|
||
|
||
environment.systemPackages =
|
||
[ pkgs.ntfs3g pkgs.cifs_utils pkgs.mountall ]
|
||
++ config.system.fsPackages;
|
||
|
||
environment.etc = singleton
|
||
{ source = fstab;
|
||
target = "fstab";
|
||
};
|
||
|
||
jobs.mountall =
|
||
{ startOn = "started udev";
|
||
|
||
task = true;
|
||
|
||
path = [ pkgs.utillinux pkgs.mountall ] ++ config.system.fsPackages;
|
||
|
||
console = "output";
|
||
|
||
preStart =
|
||
''
|
||
# Ensure that this job is restarted when fstab changed:
|
||
# ${fstab}
|
||
|
||
${optionalString config.services.nfs.client.enable ''
|
||
ensure statd || true
|
||
''}
|
||
|
||
echo "mounting filesystems..."
|
||
'';
|
||
|
||
daemonType = "daemon";
|
||
|
||
exec = "mountall --daemon";
|
||
};
|
||
|
||
# The `mount-failed' event is emitted synchronously, but we don't
|
||
# want `mountall' to wait for the emergency shell. So use this
|
||
# intermediate job to make the event asynchronous.
|
||
jobs."mount-failed" =
|
||
{ task = true;
|
||
startOn = "mount-failed";
|
||
script =
|
||
''
|
||
# Don't start the emergency shell if the X server is
|
||
# running. The user won't see it, and the "console owner"
|
||
# stanza breaks VT switching and causes the X server to go
|
||
# to 100% CPU time.
|
||
status="$(status xserver || true)"
|
||
[[ "$status" =~ start/ ]] && exit 0
|
||
|
||
stop tty1 || true
|
||
|
||
start --no-wait emergency-shell \
|
||
DEVICE="$DEVICE" MOUNTPOINT="$MOUNTPOINT"
|
||
'';
|
||
};
|
||
|
||
# On an `ip-up' event, notify mountall so that it retries mounting
|
||
# remote filesystems.
|
||
jobs."mountall-ip-up" =
|
||
{
|
||
task = true;
|
||
startOn = "ip-up";
|
||
script =
|
||
''
|
||
# Send USR1 to the mountall process. Can't use "pkill
|
||
# mountall" here because that has a race condition: we may
|
||
# accidentally send USR1 to children of mountall (such as
|
||
# fsck) just before they do execve().
|
||
status="$(status mountall)"
|
||
if [[ "$status" =~ "start/running, process "([0-9]+) ]]; then
|
||
pid=''${BASH_REMATCH[1]}
|
||
echo "sending USR1 to $pid..."
|
||
kill -USR1 "$pid"
|
||
fi
|
||
'';
|
||
};
|
||
|
||
jobs."emergency-shell" =
|
||
{ task = true;
|
||
|
||
console = "owner";
|
||
|
||
script =
|
||
''
|
||
cat <<EOF
|
||
|
||
[1;31m<<< Emergency shell >>>[0m
|
||
|
||
The filesystem \`$DEVICE' could not be mounted on \`$MOUNTPOINT'.
|
||
|
||
Please do one of the following:
|
||
|
||
- Repair the filesystem (\`fsck $DEVICE') and exit the emergency
|
||
shell to resume booting.
|
||
|
||
- Ignore any failed filesystems and continue booting by running
|
||
\`initctl emit filesystem'.
|
||
|
||
- Remove the failed filesystem from the system configuration in
|
||
/etc/nixos/configuration.nix and run \`nixos-rebuild switch'.
|
||
|
||
EOF
|
||
|
||
${pkgs.shadow}/bin/login root || false
|
||
|
||
initctl start --no-wait mountall
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
}
|