buildroot/fs/common.mk, branch 2018.02.1

fs: pass EXTRA_ENV to post-fakeroot script

2018-01-15T20:37:39+00:00

Like we do for post-build and post-image scripts, pass EXTRA_ENV to post-fakeroot script. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Signed-off-by: Peter Korsgaard

fs/common.mk: support lz4 compression

2018-01-08T22:43:58+00:00

Similar to the other compressors. Notice that we use the -l (legacy format) for Linux kernel initrd compatibility. Lz4 decompression is supported by the Linux kernel since 3.11. Signed-off-by: Peter Korsgaard Signed-off-by: Thomas Petazzoni

fs: make it behave a bit more like the package infra

2018-01-03T20:58:07+00:00

Currently, to register a filesystem, one has to call: $(eval $(call ROOTFS_TARGET,blabla)) This is very unlike the package infrastructure, where the name of the package is automatically guessed by the infra. It turns out that we can now do that for the filesystem infra too. Signed-off-by: "Yann E. MORIN" Signed-off-by: Thomas Petazzoni

fs: prepare temp directory before running PRE_GEN hooks

2017-12-02T13:37:53+00:00

Some filesystems have PRE_GEN hooks that create a directory structure under the temporary directory. For example, iso9660 will create a sub-directory where it stores the kernel (in case of initramfs or initrd). So, we must run the PRE_GEN hooks after we cleanup/create the temporary directory. Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/42835965 https://gitlab.com/buildroot.org/buildroot/-/jobs/42835967 Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Signed-off-by: Thomas Petazzoni

fs: don't remove intermediate files

2017-11-30T14:50:53+00:00

Now that they are in their own directory and no longer pollute the build dir, there is no point in removing them. Furthermore, a follow-up patch will require that those files survive when more than one filesystem image is generated. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Signed-off-by: Thomas Petazzoni

fs: don't pollute $(BUILD_DIR) with temp files

2017-11-30T10:56:08+00:00

Currently, we create a bunch of temporary files in $(BUILD_DIR), while assembling the filesystem images. Move those files to their own sub-directory. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Signed-off-by: Thomas Petazzoni

fs: remove TARGET_DIR_WARNING_FILE late

2017-11-30T10:53:11+00:00

Remove it just before generating the filesystem image. This way, removing-and-recreating the file encloses the actual image generation as tightly as possible. Signed-off-by: "Yann E. MORIN" Signed-off-by: Thomas Petazzoni

fs/common: get rid of post-target rules

2017-11-30T10:52:50+00:00

The only users of post-target rules were ext2, cpio and initramfs. Of those, ext2 and cpio were changed to use post-gen hooks, while initramfs was not even using the generic rootfs infra and was fixed to no longer reference post-target rules. Besides, the comment in the infra was really misleading: it referenced initramfs implying it was the sole user of that feature, even though initramfs was not using the fs infra. Furthermore, using post-target rules was inherently broken for top-level parallel builds, because filesystems had to ensure the ordering by themselves. Of the two real users of post-target rules (cpio and ext2), one did enforce rules ordering (apparently correctly), while the other forgot to do so. We can get rid of post-target rules altogether, now. Add a legacy check, to catch out-of-tree (e.g. br2-external) users of post-target rules, and instruct them to switch to post-gen hooks instead. Signed-off-by: "Yann E. MORIN" Cc: Thomas Petazzoni Cc: Arnout Vandecappelle Reviewed-by: Romain Naour Signed-off-by: Thomas Petazzoni

fs: add missing $$(sep) to pre- and post-command hooks code

2017-11-05T16:52:27+00:00

When multiple hooks are registred, both pre-a and post-command hooks' foreach loops need to have a separator at the end in order for the code to work as intended. Without the separator all hooks end up as a one single line command thus making all but the first hook into no-ops. Fixes: 4628b6f3b4 ("fs: add pre- and post-command hooks") Cc: Yann E. MORIN Cc: Romain Naour Signed-off-by: Andrey Smirnov Acked-by: "Yann E. MORIN" Signed-off-by: Arnout Vandecappelle (Essensium/Mind)

fs: add pre- and post-command hooks

2017-08-02T18:58:27+00:00

In some cases, the directory structure we want in the filesystem is not exactly what we have in target/ For example, when systemd is used on a read-only rootfs, /var must be a tmpfs. However, we may have packages that install stuff in there, and set important rights (via the permission-table). So, at build time, we need /var to be a symlink to the remanent location (/usr/share/factory) while at runtime we need /var to be a directory. One option would have been to have /var as a real directory even during build time, and in a target-finalize hook, move everything out of there and into the "factory" location. However, that's not possible because it's too early: some packages may want to set ownership and/or acces rights on directories or files in /var, and this is only done in the fakeroot script, which is called only later during the assembling of the filesystem images. Also, there would have been no way to undo the tweak (i.e. we need to restore the /var symlink so that subsequent builds continue to work) if it were done as a target-finalize hook. The only solution is to allow packages to register pre- and post-hooks that are called right before and right after the rootfs commands are executed, and inside in the fakeroot script. We can however not re-use the BR2_ROOTFS_POST_FAKEROOT_SCRIPT feature either because it is done before the filesystem command, but there is nothing that is done after. Also, we don't want to add to, and modify a user-supplied variable. So, we introduce two new variables that packages can set to add the commands they need to run to tweak the filesystem right at the last moment. Those hooks are not documented on-purpose; they are probably going to only ever be used by systemd. Signed-off-by: "Yann E. MORIN" Reviewed-by: Romain Naour Signed-off-by: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Thomas Petazzoni