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document kernel command-line parameters

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This commit is contained in:
illiliti 2020-09-07 09:54:12 +03:00
parent da3671d873
commit a5c5f34a66
10 changed files with 568 additions and 258 deletions
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10
Makefile
View File

@ -1,9 +1,9 @@
.POSIX:
PREFIX = /usr
BINDIR = ${PREFIX}/bin
DATADIR = ${PREFIX}/share
MANDIR = ${PREFIX}/share/man
PREFIX = /usr
BINDIR = ${PREFIX}/bin
DATADIR = ${PREFIX}/share
MANDIR = ${PREFIX}/share/man
install:
mkdir -p ${DESTDIR}${DATADIR}/tinyramfs \
@ -17,6 +17,7 @@ install:
cp tinyramfs ${DESTDIR}${BINDIR}/tinyramfs
cp docs/tinyramfs.8 ${DESTDIR}${MANDIR}/man8
cp docs/tinyramfs.hooks.7 ${DESTDIR}${MANDIR}/man7
cp docs/tinyramfs.cmdline.7 ${DESTDIR}${MANDIR}/man7
cp docs/tinyramfs.config.5 ${DESTDIR}${MANDIR}/man5
uninstall:
@ -24,4 +25,5 @@ uninstall:
rm -rf ${DESTDIR}${DATADIR}/tinyramfs
rm -f ${DESTDIR}${MANDIR}/man8/tinyramfs.8
rm -f ${DESTDIR}${MANDIR}/man7/tinyramfs.hooks.7
rm -f ${DESTDIR}${MANDIR}/man7/tinyramfs.cmdline.7
rm -f ${DESTDIR}${MANDIR}/man5/tinyramfs.config.5

246
docs/tinyramfs.cmdline.7 Normal file
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@ -0,0 +1,246 @@
.\" Generated by scdoc 1.11.0
.\" Complete documentation for this program is not available as a GNU info page
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.nh
.ad l
.\" Begin generated content:
.TH "tinyramfs.cmdline" "7" "2020-09-07"
.P
.SH NAME
.P
Tinyramfs - kernel command-line parameters
.P
.SH DESCRIPTION
.P
Tinyramfs provides a way to control configuration dynamically via
kernel parameters without needing to regenerate initramfs image.\&
.P
.SS MAN PAGE SYNTAX
.P
.nf
.RS 4
| - OR
\&.\&.\&. - can be repeated
.fi
.RE
.P
.SH GENERAL PARAMETERS
.P
\fBdebug\fR=1
.P
.RS 4
Enable debug mode.\&
.P
.RE
\fBbreak\fR=breakpoint
.P
.RS 4
Specify breakpoint where shell should be invoked.\& Useful for
debugging.\& List of supported breakpoints:
.P
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
keymap
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
devmgr
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
root
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
boot
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
luks
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
lvm
.RE
.P
.RE
\fBroot\fR=UUID|LABEL|/dev/*|PARTUUID
.P
.RS 4
Specify which way tinyramfs will use to look up root filesystem.\&
.P
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
UUID - lookup device by uuid
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
LABEL - lookup device by label
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
/dev/* - lookup device by full path
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
PARTUUID - lookup device by partition uuid
.RE
.P
Initramfs must contain \fBblkid\fR(8) for ability to use UUID, LABEL,
PARTUUID.\& Note that PARTUUID only supported in util-linux \fBblkid\fR(8).\&
.P
.RE
\fBroot_type\fR|\fBrootfstype\fR=type
.P
.RS 4
Explicitly set root filesystem type.\& Kernel must support specified type.\&
.P
.RE
\fBrootdelay\fR=delay
.P
.RS 4
Specify maximum number of seconds to wait for root device.\& Default is 30.\&
.P
.RE
\fBroot_opts\fR|\fBrootflags\fR=opts
.RS 4
.P
See \fBfstab\fR(5) fourth field.\&
.P
.RE
.SH HOOKS PARAMETERS
.P
Initramfs must contain appropriate hooks for ability to use below parameters.\&
.P
.SS LVM
.P
\fBlvm_tag\fR=tag
.P
.RS 4
Specify LVM tag which will be used to trigger LVM.\& This option will be
ignored if \fBlvm_name\fR/\fBlvm_group\fR was specified.\&
.P
.RE
\fBlvm_name\fR=name
.P
.RS 4
Specify LVM name which will be used to trigger LVM.\& \fBlvm_group\fR must be
specified.\&
.P
.RE
\fBlvm_group\fR=group
.P
.RS 4
Specify LVM group which will be used to trigger LVM.\&
.P
.RE
\fBlvm_discard\fR=1
.P
.RS 4
Pass issue_discards to lvm.\& Leave empty to disable.\& Useful for SSD's.\&
.P
.RE
.SS LUKS
.P
\fBluks_name\fR=name
.P
.RS 4
Specify which name will be registered to mapping table after cryptsetup
unlocks LUKS root.\&
.P
.RE
\fBluks_root\fR=UUID|LABEL|/dev/*|PARTUUID
.P
.RS 4
See \fBroot\fR for details.\&
.P
.RE
\fBluks_discard\fR=1
.P
.RS 4
Pass --allow-discards to \fBcryptsetup\fR.\& Leave empty to disable.\& Useful for
SSD's, but you must know that security will be decreased.\&
.P
.RE
.SH EXAMPLES
.P
.SS ROOT
.P
.nf
.RS 4
vmlinuz initrd=initramfs root=/dev/sda1 \&.\&.\&.
.fi
.RE
.P
.SS DISABLE DISCARD
.P
.nf
.RS 4
vmlinuz initrd=\\initramfs luks_discard= lvm_discard= \&.\&.\&.
.fi
.RE
.P
.SS PASS ARGUMENTS TO REAL INIT
.P
.nf
.RS 4
vmlinuz initrd=\\initramfs \&.\&.\&. -- args
.fi
.RE
.P
.SH SEE ALSO
.P
\fBtinyramfs\fR(8) \fBtinyramfs.\&config\fR(5) \fBtinyramfs.\&hooks\fR(7)

123
docs/tinyramfs.cmdline.7.scd Normal file
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@ -0,0 +1,123 @@
tinyramfs.cmdline(7)
# NAME
Tinyramfs - kernel command-line parameters
# DESCRIPTION
Tinyramfs provides a way to control configuration dynamically via
kernel parameters without needing to regenerate initramfs image.
## MAN PAGE SYNTAX
```
| - OR
... - can be repeated
```
# GENERAL PARAMETERS
*debug*=1
Enable debug mode.
*break*=breakpoint
Specify breakpoint where shell should be invoked. Useful for
debugging. List of supported breakpoints:
- keymap
- devmgr
- root
- boot
- luks
- lvm
*root*=UUID|LABEL|/dev/\*|PARTUUID
Specify which way tinyramfs will use to look up root filesystem.
- UUID - lookup device by uuid
- LABEL - lookup device by label
- /dev/\* - lookup device by full path
- PARTUUID - lookup device by partition uuid
Initramfs must contain *blkid*(8) for ability to use UUID, LABEL,
PARTUUID. Note that PARTUUID only supported in util-linux *blkid*(8).
*root_type*|*rootfstype*=type
Explicitly set root filesystem type. Kernel must support specified type.
*rootdelay*=delay
Specify maximum number of seconds to wait for root device. Default is 30.
*root_opts*|*rootflags*=opts
See *fstab*(5) fourth field.
# HOOKS PARAMETERS
Initramfs must contain appropriate hooks for ability to use below parameters.
## LVM
*lvm_tag*=tag
Specify LVM tag which will be used to trigger LVM. This option will be
ignored if *lvm_name*/*lvm_group* was specified.
*lvm_name*=name
Specify LVM name which will be used to trigger LVM. *lvm_group* must be
specified.
*lvm_group*=group
Specify LVM group which will be used to trigger LVM.
*lvm_discard*=1
Pass issue_discards to lvm. Leave empty to disable. Useful for SSD's.
## LUKS
*luks_name*=name
Specify which name will be registered to mapping table after cryptsetup
unlocks LUKS root.
*luks_root*=UUID|LABEL|/dev/\*|PARTUUID
See *root* for details.
*luks_discard*=1
Pass --allow-discards to *cryptsetup*. Leave empty to disable. Useful for
SSD's, but you must know that security will be decreased.
# EXAMPLES
## ROOT
```
vmlinuz initrd=\initramfs root=/dev/sda1 ...
```
## DISABLE DISCARD
```
vmlinuz initrd=\\initramfs luks_discard= lvm_discard= ...
```
## PASS ARGUMENTS TO REAL INIT
```
vmlinuz initrd=\\initramfs ... -- args
```
# SEE ALSO
*tinyramfs*(8) *tinyramfs.config*(5) *tinyramfs.hooks*(7)

249
docs/tinyramfs.config.5
View File

@ -5,7 +5,7 @@
.nh
.ad l
.\" Begin generated content:
.TH "tinyramfs.config" "5" "2020-09-05"
.TH "tinyramfs.config" "5" "2020-09-07"
.P
.SH NAME
.P
@ -17,21 +17,6 @@ Tinyramfs - configuration file
.P
.SH DESCRIPTION
.P
Let's reduce confusing situations and document everything !\&
.P
.SS MAN PAGE SYNTAX
.P
.nf
.RS 4
* - any value
[a] - optional value
\&.\&.\&. - can be repeated
0|1 - choice between no and yes
.fi
.RE
.P
.SS CONFIG SYNTAX
.P
Tinyramfs configuration file is a list of environment variables.\&
Each variable must be written in POSIX way, bashism not allowed.\&
.P
@ -80,9 +65,20 @@ you can simply prepend #.\&
.fi
.RE
.P
.SS MAN PAGE SYNTAX
.P
.nf
.RS 4
| - OR
* - any value
[a] - optional value
\&.\&.\&. - can be repeated
.fi
.RE
.P
.SH GENERAL OPTIONS
.P
\fBmonolith\fR=0|1
\fBmonolith\fR=1
.P
.RS 4
Monolithic kernel means kernel with builtin modules.\&
@ -93,12 +89,13 @@ version>/modules\fR exist.\& If this directory doesn't exist you probably
have monolithic kernel which means you need to set \fBmonolith\fR to \fB1\fR.\&
.P
.RE
\fBhostonly\fR=0|1
\fBhostonly\fR=1
.P
.RS 4
Hostonly mode enumerates \fBsysfs\fR(5) and copies only neccessary modules
instead of copying all modules.\& Which means that this mode can dramatically
reduce initramfs size.\& This option ignored if \fBmonolith\fR was set to \fB1\fR.\&
reduce initramfs size.\& This option will be ignored if \fBmonolith\fR was set
to \fB1\fR.\&
.P
.RE
\fBcompress\fR=command [args .\&.\&.\&]
@ -310,146 +307,77 @@ More detailed information and how to write your own hooks described in
.RE
.SH HOOKS OPTIONS
.P
\fBlvm_opts\fR=[tag, name, group, config, discard]
.SS LVM
.P
\fBlvm_tag\fR=tag
.P
.RS 4
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
tag - trigger lvm by tag
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
name - trigger lvm by logical volume name.\& group must be specified
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
group - trigger lvm by volume group name
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
config - embed /etc/lvm.\&conf config
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
discard - enable issue_discards
.RE
Specify LVM tag which will be used to trigger LVM.\& This option will be
ignored if \fBlvm_name\fR/\fBlvm_group\fR was specified.\&
.P
.RE
\fBluks_opts\fR=root=UUID|LABEL|/dev/*|PARTUUID, [key, name, header, discard]
\fBlvm_name\fR=name
.P
.RS 4
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
key - embed key
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
name - device mapper name
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
root - encrypted root
.RS 4
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
UUID - lookup device by uuid
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
LABEL - lookup device by label
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
/dev/* - lookup device by full path
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
PARTUUID - lookup device by partition uuid
.RE
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
header - embed header
.RE
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.IP \(bu 4
.\}
discard - enable allow-discards
.RE
Specify LVM name which will be used to trigger LVM.\& \fBlvm_group\fR must be
specified.\&
.P
.RE
\fBlvm_group\fR=group
.P
.RS 4
Specify LVM group which will be used to trigger LVM.\&
.P
.RE
\fBlvm_config\fR=1
.P
.RS 4
Include \fB/etc/lvm/lvm.\&conf\fR in initramfs.\&
.P
.RE
\fBlvm_discard\fR=1
.P
.RS 4
Pass issue_discards to lvm.\& Useful for SSD's.\&
.P
.RE
.SS LUKS
.P
\fBluks_key\fR=/path/to/key
.RS 4
.P
Specify location to key.\&
GPG-encrypted key currently not supported.\&
.P
.RE
\fBluks_name\fR=name
.P
.RS 4
Specify which name will be registered to mapping table after cryptsetup
unlocks LUKS root.\&
.P
.RE
\fBluks_root\fR=UUID|LABEL|/dev/*|PARTUUID
.P
.RS 4
See \fBroot\fR for details.\&
.P
.RE
\fBluks_header\fR=/path/to/header
.P
.RS 4
Specify location to detached header.\&
.P
.RE
\fBluks_discard\fR=1
.P
.RS 4
Pass --allow-discards to \fBcryptsetup\fR.\& Useful for SSD's, but you must know
that security will be decreased.\&
.P
.RE
.SS KEYMAP
.P
\fBkeymap_path\fR=/path/to/keymap
.P
.RS 4
@ -460,7 +388,7 @@ kbd loadkeys not supported.\&
.RE
.SH EXAMPLES
.P
Remember, it's just examples !\& Don't copy blindly !\& Your configuration may
Remember, these just examples !\& \fIDon't copy blindly\fR !\& Your configuration may
(and should) differ.\&
.P
.SS ROOT
@ -510,8 +438,11 @@ keymap_path=/usr/share/bkeymaps/colemak/en-latin9\&.bmap
.RS 4
hooks="mdev luks"
root=LABEL=my_root
luks_opts=root=PARTUUID=35f923c5-083a-4950-a4da-e611d0778121
luks_opts="${luks_opts},key=/root/key,header=/root/header,discard=1"
luks_discard=1
luks_key=/root/key
luks_header=/root/header
luks_root=PARTUUID=35f923c5-083a-4950-a4da-e611d0778121
.fi
.RE
.P
@ -521,9 +452,15 @@ luks_opts="${luks_opts},key=/root/key,header=/root/header,discard=1"
.RS 4
compress="lz4 -9"
hooks="eudev lvm luks"
luks_opts=root=/dev/sdb2,discard=1
lvm_opts=name=lvm1,group=lvm_grp2,config=1,discard=1
root=/dev/disk/by-uuid/aa82d7bb-ab2b-4739-935f-fd8a5c9a6cb0
luks_discard=1
luks_root=/dev/sdb2
lvm_config=1
lvm_discard=1
lvm_name=lvm1
lvm_group=lvm_grp2
.fi
.RE
.P

111
docs/tinyramfs.config.5.scd
View File

@ -10,19 +10,6 @@ Tinyramfs - configuration file
# DESCRIPTION
Let's reduce confusing situations and document everything !
## MAN PAGE SYNTAX
```
* - any value
[a] - optional value
... - can be repeated
0|1 - choice between no and yes
```
## CONFIG SYNTAX
Tinyramfs configuration file is a list of environment variables.
Each variable must be written in POSIX way, bashism not allowed.
@ -61,9 +48,18 @@ you can simply prepend \#.
#key=value
```
## MAN PAGE SYNTAX
```
| - OR
* - any value
[a] - optional value
... - can be repeated
```
# GENERAL OPTIONS
*monolith*=0|1
*monolith*=1
Monolithic kernel means kernel with builtin modules.
If you didn't build kernel yourself, then in most cases you have
@ -72,11 +68,12 @@ you can simply prepend \#.
version>/modules* exist. If this directory doesn't exist you probably
have monolithic kernel which means you need to set *monolith* to *1*.
*hostonly*=0|1
*hostonly*=1
Hostonly mode enumerates *sysfs*(5) and copies only neccessary modules
instead of copying all modules. Which means that this mode can dramatically
reduce initramfs size. This option ignored if *monolith* was set to *1*.
reduce initramfs size. This option will be ignored if *monolith* was set
to *1*.
*compress*=command [args ...]
@ -138,25 +135,56 @@ you can simply prepend \#.
# HOOKS OPTIONS
*lvm_opts*=[tag, name, group, config, discard]
## LVM
- tag - trigger lvm by tag
- name - trigger lvm by logical volume name. group must be specified
- group - trigger lvm by volume group name
- config - embed /etc/lvm.conf config
- discard - enable issue_discards
*lvm_tag*=tag
*luks_opts*=root=UUID|LABEL|/dev/\*|PARTUUID, [key, name, header, discard]
Specify LVM tag which will be used to trigger LVM. This option will be
ignored if *lvm_name*/*lvm_group* was specified.
- key - embed key
- name - device mapper name
- root - encrypted root
- UUID - lookup device by uuid
- LABEL - lookup device by label
- /dev/\* - lookup device by full path
- PARTUUID - lookup device by partition uuid
- header - embed header
- discard - enable allow-discards
*lvm_name*=name
Specify LVM name which will be used to trigger LVM. *lvm_group* must be
specified.
*lvm_group*=group
Specify LVM group which will be used to trigger LVM.
*lvm_config*=1
Include */etc/lvm/lvm.conf* in initramfs.
*lvm_discard*=1
Pass issue_discards to lvm. Useful for SSD's.
## LUKS
*luks_key*=/path/to/key
Specify location to key.
GPG-encrypted key currently not supported.
*luks_name*=name
Specify which name will be registered to mapping table after cryptsetup
unlocks LUKS root.
*luks_root*=UUID|LABEL|/dev/\*|PARTUUID
See *root* for details.
*luks_header*=/path/to/header
Specify location to detached header.
*luks_discard*=1
Pass --allow-discards to *cryptsetup*. Useful for SSD's, but you must know
that security will be decreased.
## KEYMAP
*keymap_path*=/path/to/keymap
@ -166,7 +194,7 @@ you can simply prepend \#.
# EXAMPLES
Remember, it's just examples ! Don't copy blindly ! Your configuration may
Remember, these just examples ! _Don't copy blindly_ ! Your configuration may
(and should) differ.
## ROOT
@ -207,8 +235,11 @@ keymap_path=/usr/share/bkeymaps/colemak/en-latin9.bmap
```
hooks="mdev luks"
root=LABEL=my_root
luks_opts=root=PARTUUID=35f923c5-083a-4950-a4da-e611d0778121
luks_opts="${luks_opts},key=/root/key,header=/root/header,discard=1"
luks_discard=1
luks_key=/root/key
luks_header=/root/header
luks_root=PARTUUID=35f923c5-083a-4950-a4da-e611d0778121
```
## ROOT + LVM + LUKS
@ -216,9 +247,15 @@ luks_opts="${luks_opts},key=/root/key,header=/root/header,discard=1"
```
compress="lz4 -9"
hooks="eudev lvm luks"
luks_opts=root=/dev/sdb2,discard=1
lvm_opts=name=lvm1,group=lvm_grp2,config=1,discard=1
root=/dev/disk/by-uuid/aa82d7bb-ab2b-4739-935f-fd8a5c9a6cb0
luks_discard=1
luks_root=/dev/sdb2
lvm_config=1
lvm_discard=1
lvm_name=lvm1
lvm_group=lvm_grp2
```
# SEE ALSO

26
hooks/luks/luks
View File

@ -3,9 +3,6 @@
#
# false positive
# shellcheck disable=2154
#
# word splitting is safe by design
# shellcheck disable=2086
{
[ "$hostonly" = 1 ] &&
for _module in \
@ -21,16 +18,21 @@
# see https://bugs.archlinux.org/task/56771
[ -e /lib/libgcc_s.so.1 ] && copy_file /lib/libgcc_s.so.1 /lib 755 1
IFS=,; set -- $luks_opts; unset IFS
[ "$luks_key" ] && {
copy_file "${luks_key#*=}" /root 400 0
for opt; do case "${opt%%=*}" in
key | header)
copy_file "${opt#*=}" /root 400 0
sed "s|${luks_key#*=}|/root/key|" \
"${tmpdir}/etc/tinyramfs/config" > "${tmpdir}/_"
sed "s|${opt#*=}|/root/${opt%%=*}|" \
"${tmpdir}/etc/tinyramfs/config" > "${tmpdir}/_"
mv "${tmpdir}/_" "${tmpdir}/etc/tinyramfs/config"
}
mv "${tmpdir}/_" "${tmpdir}/etc/tinyramfs/config"
chmod 600 "${tmpdir}/etc/tinyramfs/config"
esac || panic; done
[ "$luks_header" ] && {
copy_file "${luks_header#*=}" /root 400 0
sed "s|${luks_header#*=}|/root/header|" \
"${tmpdir}/etc/tinyramfs/config" > "${tmpdir}/_"
mv "${tmpdir}/_" "${tmpdir}/etc/tinyramfs/config"
}
}

22
hooks/luks/luks.init
View File

@ -5,32 +5,18 @@
# shellcheck disable=2154
#
# word splitting is safe by design
# shellcheck disable=2086,2068
# shellcheck disable=2068
{
[ "$break" = luks ] && { print "break before unlock_luks()"; sh; }
export DM_DISABLE_UDEV=1
mkdir -p /run/cryptsetup
IFS=,; set -- $luks_opts; unset IFS
for opt; do case "$opt" in
discard=1) luks_discard="--allow-discards" ;;
header=*) luks_header="--${opt}" ;;
name=*) luks_name="${opt#*=}" ;;
root=*) luks_root="${opt#*=}" ;;
key=*) luks_key="-d ${opt#*=}" ;;
esac; done
resolve_device "$luks_root"
set -- \
"$luks_key" "$luks_header" "$luks_discard" \
"$device" "${luks_name:-crypt-${device##*/}}"
# libdevice-mapper assumes that udev has dm rules
# which is not true because we use our device-helper for dm stuff
# this variable fixes possible(?) hang
export DM_DISABLE_UDEV=1
"${luks_discard:+--allow-discards}" "${luks_header:+--header $luks_header}" \
"${luks_key:+-d $luks_key}" "$device" "${luks_name:-crypt-${device##*/}}"
cryptsetup open $@ || panic "failed to unlock LUKS"
}

12
hooks/lvm/lvm
View File

@ -3,9 +3,6 @@
#
# false positive
# shellcheck disable=2154
#
# word splitting is safe by design
# shellcheck disable=2086
{
[ "$hostonly" = 1 ] &&
for _module in \
@ -29,17 +26,10 @@
use_lvmetad = 0
}"
IFS=,; set -- $lvm_opts; unset IFS
for opt; do case "$opt" in
config=1) embed_lvm_config=
esac; done
mkdir -p "${tmpdir}/etc/lvm"
lvm config \
--config "$lvm_config" \
${embed_lvm_config+--mergedconfig} \
${lvm_config:+--mergedconfig} \
> "${tmpdir}/etc/lvm/lvm.conf"
}

25
hooks/lvm/lvm.init
View File

@ -5,35 +5,22 @@
# shellcheck disable=2154
#
# word splitting is safe by design
# shellcheck disable=2086,2068
# shellcheck disable=2068
{
[ "$break" = lvm ] && { print "break before trigger_lvm()"; sh; }
export DM_DISABLE_UDEV=1
mkdir -p /run/lvm /run/lock/lvm
IFS=,; set -- $lvm_opts; unset IFS
for opt; do case "$opt" in
discard=1) lvm_discard="--config=devices{issue_discards=1}" ;;
config=0) : > /etc/lvm/lvm.conf ;;
group=*) lvm_group="${opt#*=}" ;;
name=*) lvm_name="/${opt#*=}" ;;
tag=*) lvm_tag="@${opt#*=}" ;;
esac; done
set -- "--sysinit" "-qq" "-aay" "$lvm_discard"
# libdevice-mapper assumes that udev have dm rules
# which is not true because we use our device-helper for dm stuff
# this variable fixes possible(?) hang
export DM_DISABLE_UDEV=1
set -- \
--sysinit -qq -aay "${lvm_discard:+--config=devices{issue_discards=1}}"
if [ "$lvm_group" ] && [ "$lvm_name" ]; then
lvm lvchange $@ "${lvm_group}${lvm_name}"
lvm lvchange $@ "${lvm_group}/${lvm_name}"
elif [ "$lvm_group" ]; then
lvm vgchange $@ "$lvm_group"
elif [ "$lvm_tag" ]; then
lvm lvchange $@ "$lvm_tag"
lvm lvchange $@ "@${lvm_tag}"
else
lvm vgchange $@
fi || panic "failed to trigger LVM"

2
init
View File

@ -30,7 +30,7 @@ resolve_device()
# XXX what the hell happens here?
# why this loop sometimes trigger panic if i remove '|| :'
while [ ! -b "$device" ]; do sleep 1
[ "$((count += 1))" = 30 ] && {
[ "$((count += 1))" = "${rootdelay:=30}" ] && {
panic "failed to lookup partition"
break
}