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This was noticed in Brussels at the hackfest. The fstab-generator currently
creates a broken symlink pointing to itself in
/run/systemd/generator/local-fs.target.wants/ for systemd-fsck-root.service
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This fixes a regression introduced in 64e70e4 where the mount fails
when fstab is misconfigured with fs_passno > 0 on a virtual file
system like nfs, and the type is specified as "auto".
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This allows the user to disable fsck's by masking.
If fsck fails, emergency target is started, the user might mount the
unit using mount and disable fsck by masking the unit. In this case,
.mount will be active because the mount is detect through
/proc/self/mountinfo, but systemd-fsck@.service will still be in
failed mode. This results in a funny situation where
$ systemctl show -p ActiveState local-fs.target yyy.mount
ActiveState=active
ActiveState=active
$ sudo systemctl start local-fs.target
[sudo] password for test:
Failed to start local-fs.target: Unit systemd-fsck@xxx.service is masked.
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If fstab contains 1 for passno, treat this as an error, but only warn
briefly. If fstab doesn't contain this information, don't complain at
all.
Patch is complicated a bit by the fact that we might have the fstype specified
in fstab or on /proc/cmdline, in which case we can check if we have the appropriate
fsck tool, or not specified, or specified as auto, in which case we have to look
and check the type of the filesystem ourselves. It cannot be done before the
device appears, so it is too early in the generator phase, and it must be done
directly in fsck service.
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Instead of individually checking for containers in each user do this
once in a new call proc_cmdline() that read the file only if we are not
in a container.
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fsck-root is redundant in case an initrd is used, or in case the rootfs
is never remounted 'rw', so the new default is the correct behavior for
most users. For the rest, they should enable it in fstab.
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instead of using FsckPassNo
[tomegun:
* order all fsck instances after fsck-root
* check for OOM
* added notes in the manpages]
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[tomegun: without this we would never fsck the rootfs if it was directly
mounted 'rw' from the initrd. We now risk fsck'ing it twice in the case it
is mounted 'ro', so that should be addressed in a separate patch.]
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clang FTW!
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As we load unit files lazily, we need to make sure something pulls in swap
units that should be started automatically, otherwise the default dependencies
will never be applied.
This partially reinstates code removed in
commit 64347fc2b983f33e7efb0fd2bb44e133fb9f30f4.
Also don't order swap devices after swap.target when they are 'nofail'.
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This makes mount units work like swap units: when the backing device appears
the mount unit will be started.
v2: the device should want the mount unconditionally, not only for DefaultDependencies=yes
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This removes some redundancy between the generator and the core mount handling.
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Currently we don't respect noauto/nofail root mount options (from
rootflags kernel cmdline). We should map these two flags to the
corresponding boolean variable noauto and nofail when calling
add_mount().
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http://lists.freedesktop.org/archives/systemd-devel/2013-April/010510.html
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gcc thinks that errno might be negative, and functions could return
something positive on error (-errno). Should not matter in practice,
but makes an -O4 build much quieter.
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https://bugzilla.redhat.com/show_bug.cgi?id=787314
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x-initrd.mount now has different meanings, if fstab-generator is called
in the initramfs.
initrd:/etc/fstab and x-initrd.mount defines mounts for the
initrd-root-fs.target
initrd:/sysroot/etc/fstab and x-initrd.mount defines mounts for the
initrd-fs.target
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Some installation media (fedora at least) does not have and need a
"root=" argument on the kernel command line.
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mounts
This introduces remote-fs-setup.target independently of
remote-fs-pre.target. The former is only for pulling things in, the
latter only for ordering.
The new semantics:
remote-fs-setup.target: is pulled in automatically by all remote mounts.
Shall be used to pull in other units that want to run when at least one
remote mount is set up. Is not ordered against the actual mount units,
in order to allow activation of its dependencies even 'a posteriori',
i.e. when a mount is established outside of systemd and is only picked
up by it.
remote-fs-pre.target: needs to be pulled in automatically by the
implementing service, is otherwise not part of the initial transaction.
This is ordered before all remote mount units.
A service that wants to be pulled in and run before all remote mounts
should hence have:
a) WantedBy=remote-fs-setup.target -- so that it is pulled in
b) Wants=remote-fs-pre.target + Before=remote-fs-pre.target -- so that
it is ordered before the mount point, normally.
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This changes the fstab mount option x-initrd-rootfs.mount to
x-initrd.rootfs, in order to only use a single namespace "x-initrd." for
all mount options of the initrd.
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First, rename root-fs.target to initrd-root-fs.target to clarify its usage.
Mount units with "x-initrd-rootfs.mount" are now ordered before
initrd-root-fs.target. As we sometimes construct /sysroot mounts in
/etc/fstab in the initrd, we want these to be mounted before the
initrd-root-fs.target is active.
initrd.target can be the default target in the initrd.
(normal startup)
:
:
v
basic.target
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______________________/|
/ |
| sysroot.mount
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| v
| initrd-root-fs.target
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| v
| initrd-parse-etc.service
(custom initrd services) |
| v
| (sysroot-usr.mount and
| various mounts marked
| with fstab option
| x-initrd.mount)
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| v
| initrd-fs.target
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\______________________ |
\|
v
initrd.target
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v
initrd-cleanup.service
isolates to
initrd-switch-root.target
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v
______________________/|
/ |
| initrd-udevadm-cleanup-db.service
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(custom initrd services) |
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\______________________ |
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v
initrd-switch-root.target
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v
initrd-switch-root.service
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v
switch-root
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Instead of using local-fs*.target in the initrd, use root-fs.target for
sysroot.mount and initrd-fs.target for /sysroot/usr and friends.
Using local-fs.target would mean to carry over the activated
local-fs.target to the isolated initrd-switch-root.target and thus in
the real root. Having local-fs.target already active after
deserialization causes ordering problems with the real root services and
targets.
We better isolate to targets for initrd-switch-root.target, which are
only available in the initrd.
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This reverts commit 8330847e949fc0c26b16910e5240eef1fe2c330a.
Conflicts:
src/fstab-generator/fstab-generator.c
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parameter
skip s.th. like root=nfs:... root=iscsi:... root=nbd:...
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also do not overwrite /sysroot*.mount units already generated from fstab
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We only mount "/usr" and entries marked with "x-initrd.mount".
This (together with the right unit files) is needed in the initramfs in order to
natively support mounting /usr (and friends) from the initramfs.
The way it is meant to work is:
* wait for sysroot.mount to be mounted
* do a daemon-reload to generate sysroot-usr.mount (++) from /sysroot/etc/fstab
* wait for sysroot-usr.mount to be mounted
* switch-root
Cc: Harald Hoyer <harald.hoyer@gmail.com>
Cc: Dave Reisner <d@falconindy.com>
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I originally added this to stay as compatible as possible with the kernel, but
as Lennart argued it is not really useful in the initramfs, so let's drop it (we
already don't support 'rootdealy').
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Don't use "defaults" as default option string.
"defaults,<anyotheroption>" does not
even work for the mount unit mount options.
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Correctly detect rbind mount option as bind mount.
Fixes https://bugzilla.novell.com/show_bug.cgi?id=804575.
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Use /sysroot instead of /new_root to mount the real root in the
initramfs.
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Also split out some fileio functions to fileio.c and provide a SELinux
aware pendant in fileio-label.c
see https://bugzilla.redhat.com/show_bug.cgi?id=881577
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Skipped bootchart and various files that looked like they should be
kept in sync with external sources.
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The configuration is taken from /proc/cmdline, aiming at emulating the
behavior of the kernel when no initramfs is used.
The supported options are: root=, rootfstype=, rootwait=, rootflags=,
ro, and rw. rootdelay= was dropped, as it is not really useful in a
systemd world, but could easily be added.
v2: fix comments by Lennart, and complain loudly if root= can not be found
Cc: Harald Hoyer <harald@redhat.com>
Cc: Dave Reisner <dreisner@archlinux.org>
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This kinda undoes a83cbaccd03c3f28e47e9330f4a22ff65ce4b561 and
1d634e21b453f3c80d7c6c4bd90a6b84e42a3d2a but corrects the original code
to compare the mount type with "bind" rather than the mount options.
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Traditional sysvinit systems would not complain about duplicates in
fstab. Rather it (through monut -a) would mount one fs on top of another,
in effect the last entry taking precedent.
In systemd, the first entry takes precedent, all subsequent ones are
ignored and an error is printed.
The change of behavior and the source of this error message was causing
some confusion, so give a hint what migt be wrong.
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Do the check in-line instead, as the function is now a bit pointless.
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also a number of minor fixups and bug fixes: spelling, oom errors
that didn't print errors, not properly forwarding error codes,
few more consistency issues, et cetera
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