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fstools: enable any device with non-MTD rootfs_data volume to support extroot
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lean
parent
e63bfdca57
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@ -79,7 +79,7 @@ define Package/block-mount
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SECTION:=base
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SECTION:=base
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CATEGORY:=Base system
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CATEGORY:=Base system
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TITLE:=Block device mounting and checking
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TITLE:=Block device mounting and checking
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DEPENDS:=+ubox +libubox +libuci +libblobmsg-json +libjson-c
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DEPENDS:=+fstools +ubox +libubox +libuci +libblobmsg-json +libjson-c
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endef
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endef
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define Package/blockd
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define Package/blockd
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@ -0,0 +1,139 @@
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From: Qi Liu <liuqi_colin@msn.com>
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In order to support extroot, block extroot command has to be able to
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discover and properly mount the rootfs_data volume in order to discover
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the extroot volume. Currently this process can only discover MTD devices.
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This patch leverages libfstools in a similar way as mount_root to
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discover, initialize, and mount rootfs_data volume. It would enable any
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device with non-MTD rootfs_data volume to support extroot, including x86.
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Signed-off-by: Qi Liu <liuqi_colin@msn.com>
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---
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CMakeLists.txt | 4 ++--
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block.c | 40 ++++++++++++++++++++++++++++++++++++++++
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libfstools/fstype.h | 12 ++++++++++++
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libfstools/libfstools.h | 11 +----------
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4 files changed, 55 insertions(+), 12 deletions(-)
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create mode 100644 libfstools/fstype.h
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diff --git a/CMakeLists.txt b/CMakeLists.txt
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index a586577..4b6e3e7 100644
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--- a/CMakeLists.txt
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+++ b/CMakeLists.txt
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@@ -75,9 +75,9 @@ INSTALL(TARGETS blockd RUNTIME DESTINATION sbin)
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ADD_EXECUTABLE(block block.c probe.c probe-libblkid.c)
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IF(DEFINED CMAKE_UBIFS_EXTROOT)
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ADD_DEFINITIONS(-DUBIFS_EXTROOT)
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- TARGET_LINK_LIBRARIES(block blkid-tiny dl uci ubox ubus blobmsg_json ubi-utils ${json})
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+ TARGET_LINK_LIBRARIES(block fstools blkid-tiny dl uci ubox ubus blobmsg_json ubi-utils ${json})
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ELSE(DEFINED CMAKE_UBIFS_EXTROOT)
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- TARGET_LINK_LIBRARIES(block blkid-tiny dl uci ubox ubus blobmsg_json ${json})
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+ TARGET_LINK_LIBRARIES(block fstools blkid-tiny dl uci ubox ubus blobmsg_json ${json})
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ENDIF(DEFINED CMAKE_UBIFS_EXTROOT)
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INSTALL(TARGETS block RUNTIME DESTINATION sbin)
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diff --git a/block.c b/block.c
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index 569bf56..66cce46 100644
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--- a/block.c
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+++ b/block.c
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@@ -45,6 +45,8 @@
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#include <libubox/avl-cmp.h>
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#include <libubus.h>
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+#include "libfstools/fstype.h"
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+#include "libfstools/volume.h"
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#include "probe.h"
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#define AUTOFS_MOUNT_PATH "/tmp/run/blockd/"
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@@ -1590,6 +1592,44 @@ static int main_extroot(int argc, char **argv)
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}
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#endif
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+ /* Find volume using libfstools */
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+ struct volume *data = volume_find("rootfs_data");
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+ if (data) {
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+ volume_init(data);
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+
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+ switch (volume_identify(data)) {
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+ case FS_EXT4: {
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+ char cfg[] = "/tmp/ext4_cfg";
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+
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+ /* Mount volume and try extroot (using fstab from that vol) */
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+ mkdir_p(cfg, 0755);
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+ if (!mount(data->blk, cfg, "ext4", MS_NOATIME, NULL)) {
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+ err = mount_extroot(cfg);
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+ umount2(cfg, MNT_DETACH);
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+ }
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+ if (err < 0)
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+ rmdir("/tmp/overlay");
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+ rmdir(cfg);
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+ return err;
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+ }
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+
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+ case FS_F2FS: {
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+ char cfg[] = "/tmp/f2fs_cfg";
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+
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+ /* Mount volume and try extroot (using fstab from that vol) */
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+ mkdir_p(cfg, 0755);
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+ if (!mount(data->blk, cfg, "f2fs", MS_NOATIME, NULL)) {
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+ err = mount_extroot(cfg);
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+ umount2(cfg, MNT_DETACH);
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+ }
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+ if (err < 0)
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+ rmdir("/tmp/overlay");
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+ rmdir(cfg);
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+ return err;
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+ }
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+ }
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+ }
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+
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/* As a last resort look for /etc/config/fstab on "rootfs" partition */
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return mount_extroot(NULL);
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}
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diff --git a/libfstools/fstype.h b/libfstools/fstype.h
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new file mode 100644
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index 0000000..8882343
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--- /dev/null
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+++ b/libfstools/fstype.h
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@@ -0,0 +1,13 @@
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+#ifndef _FS_TYPE_H__
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+#define _FS_TYPE_H__
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+enum {
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+ FS_NONE,
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+ FS_SNAPSHOT,
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+ FS_JFFS2,
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+ FS_DEADCODE,
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+ FS_UBIFS,
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+ FS_F2FS,
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+ FS_EXT4,
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+ FS_TARGZ,
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+};
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+#endif
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\ No newline at end of file
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diff --git a/libfstools/libfstools.h b/libfstools/libfstools.h
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index f27307a..8d3362f 100644
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--- a/libfstools/libfstools.h
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+++ b/libfstools/libfstools.h
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@@ -18,20 +18,10 @@
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#include <libubox/blob.h>
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#include <libubox/ulog.h>
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#include <libubox/utils.h>
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+#include "fstype.h"
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struct volume;
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-enum {
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- FS_NONE,
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- FS_SNAPSHOT,
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- FS_JFFS2,
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- FS_DEADCODE,
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- FS_UBIFS,
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- FS_F2FS,
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- FS_EXT4,
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- FS_TARGZ,
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-};
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-
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enum fs_state {
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FS_STATE_UNKNOWN,
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FS_STATE_PENDING,
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