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| author | John Crispin <blogic@openwrt.org> | 2014-06-11 12:59:10 +0000 |
|---|---|---|
| committer | John Crispin <blogic@openwrt.org> | 2014-06-11 12:59:10 +0000 |
| commit | 41aefc93320d42ff4ae8baab83f61b60c6e65d2b (patch) | |
| tree | 28b5cc56bd1387953c7206e3e5924fe7a120d186 /target/linux/generic/patches-3.14/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch | |
| parent | f9d01db1cd353a17ffee483ff5d225b8f5e7b0ba (diff) | |
| download | master-187ad058-41aefc93320d42ff4ae8baab83f61b60c6e65d2b.tar.gz master-187ad058-41aefc93320d42ff4ae8baab83f61b60c6e65d2b.tar.bz2 master-187ad058-41aefc93320d42ff4ae8baab83f61b60c6e65d2b.zip | |
kernel: rootfs auto-mount on ubi
Similar to the rootfs hacks on NOR flash devices, this series
introduces support for auto-attaching (ubi device), auto-creating
(ubiblock device) and mounting the "rootfs" (ubifs or squashfs)
volume.
This is needed so OpenWrt can start without relying on the bootloader
to pass the ubi.mtd, ubi.block, rootfs and rootfstype parameters, but
instead auto-detect the root filesystem according to a simple convention.
OpenWrt-specific:
490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
491-ubi-auto-create-ubiblock-device-for-rootfs.patch
492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch
493-ubi-set-ROOT_DEV-to-ubiblock-rootfs-if-unset.patch
sent upstream:
552-ubifs-respect-silent-mount-flag.patch
http://lists.infradead.org/pipermail/linux-mtd/2014-May/053893.html
v2: actually retry with MS_RDONLY when mounting read-only ubifs root
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41119 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/patches-3.14/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch')
| -rw-r--r-- | target/linux/generic/patches-3.14/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.14/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch b/target/linux/generic/patches-3.14/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch new file mode 100644 index 0000000000..75a0bc02ca --- /dev/null +++ b/target/linux/generic/patches-3.14/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch @@ -0,0 +1,58 @@ +From eea9e1785e4c05c2a3444506aabafa0ae958538f Mon Sep 17 00:00:00 2001 +From: Daniel Golle <daniel@makrotopia.org> +Date: Sat, 17 May 2014 03:35:02 +0200 +Subject: [PATCH 4/5] try auto-mounting ubi0:rootfs in init/do_mounts.c +To: openwrt-devel@lists.openwrt.org + +Signed-off-by: Daniel Golle <daniel@makrotopia.org> +--- + init/do_mounts.c | 26 +++++++++++++++++++++++++- + 1 file changed, 25 insertions(+), 1 deletion(-) + +diff --git a/init/do_mounts.c b/init/do_mounts.c +index 82f2288..faba9c6 100644 +--- a/init/do_mounts.c ++++ b/init/do_mounts.c +@@ -432,7 +432,27 @@ retry: + out: + put_page(page); + } +- ++ ++static int __init mount_ubi_rootfs(void) ++{ ++ int flags = MS_SILENT; ++ int err, tried = 0; ++ ++ while (tried < 2) { ++ err = do_mount_root("ubi0:rootfs", "ubifs", flags, \ ++ root_mount_data); ++ switch (err) { ++ case -EACCES: ++ flags |= MS_RDONLY; ++ tried++; ++ default: ++ return err; ++ } ++ } ++ ++ return -EINVAL; ++} ++ + #ifdef CONFIG_ROOT_NFS + + #define NFSROOT_TIMEOUT_MIN 5 +@@ -526,6 +546,10 @@ void __init mount_root(void) + change_floppy("root floppy"); + } + #endif ++#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV ++ if (!mount_ubi_rootfs()) ++ return; ++#endif + #ifdef CONFIG_BLOCK + create_dev("/dev/root", ROOT_DEV); + mount_block_root("/dev/root", root_mountflags); +-- +1.9.2 + |