Commit Graph

13 Commits

Author SHA1 Message Date
Gustavo Zacarias
cfd1f70a10 fs/initramfs: fix initramfs support
On commit a24877586a TARGETS_ROOTFS was
introduced, however fs/initramfs/initramfs.mk was never updated, hence a
show-targets would be rootfs-initramfs with rootfs-cpio afterwards hence
never rebuilding the kernel with a proper cpio archive since TARGETS is
always before rootfs-* as stated in the commit description.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2014-03-06 23:01:33 +01:00
Jerzy Grzegorek
cd2ff4f637 package: remove the empty trailing lines
Signed-off-by: Jerzy Grzegorek <jerzy.grzegorek@trzebnica.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-09-13 11:10:23 +02:00
Jerzy Grzegorek
086f333f39 Normalize separator size to 80
Signed-off-by: Jerzy Grzegorek <jerzy.grzegorek@trzebnica.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-06-07 10:54:54 +02:00
Arnout Vandecappelle (Essensium/Mind)
13a3afc536 fs/initramfs: refactor with fs/cpio
An initramfs is in fact the same as a cpio archive, but embedded in
the kernel.  So instead of duplicating the cpio infrastructure,
we can simply build images/rootfs.cpio and link that into the
kernel.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-09-27 22:46:00 +02:00
Peter Korsgaard
424888e474 initramfs: fix boot with dynamic /dev
Devtmpfs (which is used by devtmpfs/mdev/udev options) doesn't get
automounted by the kernel when an initramfs is used, causing boot
failures when a dynamic /dev is used.

Fix it by adding a pre-init script to mount devtmpfs before running init.

Reported-by: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2011-07-20 16:30:14 +02:00
Mike Frysinger
dde5b6830c initramfs: fix init symlink creation
The -e test will dereference the symlink, so if there is no /bin/init,
we will constantly try to create the symlink.  So rather than error on
subsequent runs when the link exists, use the force flag to ln.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-11-17 21:20:45 +01:00
Thomas Petazzoni
2e869a7c05 Remove INITRAMFS_TARGET variable
This used to be needed when the filesystem code was rewritten, but not
the Linux compilation code. Now that the Linux compilation code has
been rewritten, the mechanism to ensure that initramfs gets built
*before* the kernel so that it can be integrated is different, and
this INITRAMFS_TARGET variable is no longer used.

See f507921d39 for details.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-11-04 19:26:27 +01:00
Simon Pasch
c4cdcc3680 initramfs: Don't overwrite $(TARGET_DIR)/init if it exists
Closes #2443

Allow use of custom init scripts.

Signed-off-by: Simon Pasch <fpasch@googlemail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-08-29 23:34:03 +02:00
Thomas Petazzoni
f507921d39 linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.

However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.

So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.

To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).

The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.

In linux/linux.mk, we do various things :

 * If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
   enabled as a root filesystem type), then we create an empty
   rootfs.initramfs file (remember that at this point, the root
   filesystem hasn't been generated) and we adjust the kernel
   configuration to include an initramfs. Of course, in the initial
   kernel build, this initramfs will be empty.

 * In the linux26-rebuild-with-initramfs target, we retrigger a
   compilation of the kernel image, after removing the initramfs in
   the kernel sources to make sure it gets properly rebuilt (we've
   experienced cases were modifying the rootfs.initramfs file wouldn't
   retrigger the generation of the initramfs at the kernel level).

This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-22 21:20:28 +02:00
Will Wagner
4ddb427ef9 initramfs: fix init symlink
When initramfs was ported to the new fs structure the init symlink
macro was defined, but forgot to add it to PRE_GEN_HOOKS

Signed-off-by: Will Wagner <will_wagner@carallon.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-04-20 16:54:50 +02:00
Will Wagner
102ca91d74 Repair initramfs dependancies after move to fs
The restructure for building root filesystems changed the target name
for the initramfs file, to build the file the trget is now
initramfs-root but the generated file is rootfs.initramfs

Signed-off-by: Will Wagner <will_wagner@carallon.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-04-20 00:02:36 +02:00
Will Wagner
a7e276bc3d initramfs: trivial fix following move to fs
Signed-off-by: Will Wagner <will_wagner@carallon.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2010-04-15 13:50:37 +02:00
Thomas Petazzoni
0585241505 Move all filesystem generation code to fs/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-09 11:04:36 +02:00