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authorImre Kaloz <kaloz@openwrt.org>2015-01-25 15:20:39 +0000
committerImre Kaloz <kaloz@openwrt.org>2015-01-25 15:20:39 +0000
commitd26694243af236fed09a4b38f3cc68e40ad063b5 (patch)
treedf356ae59718ae0996986ccb61155243098dbc3f /target/linux/generic/patches-3.19/491-ubi-auto-create-ubiblock-device-for-rootfs.patch
parenta46bb6ec6a0ed6eb56dc2f4551a57e63a7292753 (diff)
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generic: add preliminary 3.19 support
Signed-off-by: Imre Kaloz <kaloz@openwrt.org> SVN-Revision: 44126
Diffstat (limited to 'target/linux/generic/patches-3.19/491-ubi-auto-create-ubiblock-device-for-rootfs.patch')
-rw-r--r--target/linux/generic/patches-3.19/491-ubi-auto-create-ubiblock-device-for-rootfs.patch69
1 files changed, 69 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.19/491-ubi-auto-create-ubiblock-device-for-rootfs.patch b/target/linux/generic/patches-3.19/491-ubi-auto-create-ubiblock-device-for-rootfs.patch
new file mode 100644
index 0000000000..c0ee1f7673
--- /dev/null
+++ b/target/linux/generic/patches-3.19/491-ubi-auto-create-ubiblock-device-for-rootfs.patch
@@ -0,0 +1,69 @@
+From 0f3966579815f889bb2fcb4846152c35f65e79c4 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Thu, 15 May 2014 21:06:33 +0200
+Subject: [PATCH 2/5] ubi: auto-create ubiblock device for rootfs
+To: openwrt-devel@lists.openwrt.org
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/mtd/ubi/block.c | 42 ++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 42 insertions(+)
+
+--- a/drivers/mtd/ubi/block.c
++++ b/drivers/mtd/ubi/block.c
+@@ -614,6 +614,44 @@ static int __init ubiblock_create_from_p
+ return ret;
+ }
+
++#define UBIFS_NODE_MAGIC 0x06101831
++static inline int ubi_vol_is_ubifs(struct ubi_volume_desc *desc)
++{
++ int ret;
++ uint32_t magic_of, magic;
++ ret = ubi_read(desc, 0, (char *)&magic_of, 0, 4);
++ if (ret)
++ return 0;
++ magic = le32_to_cpu(magic_of);
++ return magic == UBIFS_NODE_MAGIC;
++}
++
++static void __init ubiblock_create_auto_rootfs(void)
++{
++ int ubi_num, ret, is_ubifs;
++ struct ubi_volume_desc *desc;
++ struct ubi_volume_info vi;
++
++ for (ubi_num = 0; ubi_num < UBI_MAX_DEVICES; ubi_num++) {
++ desc = ubi_open_volume_nm(ubi_num, "rootfs", UBI_READONLY);
++ if (IS_ERR(desc))
++ continue;
++
++ ubi_get_volume_info(desc, &vi);
++ is_ubifs = ubi_vol_is_ubifs(desc);
++ ubi_close_volume(desc);
++ if (is_ubifs)
++ break;
++
++ ret = ubiblock_create(&vi);
++ if (ret)
++ pr_err("UBI error: block: can't add '%s' volume, err=%d\n",
++ vi.name, ret);
++ /* always break if we get here */
++ break;
++ }
++}
++
+ static void ubiblock_remove_all(void)
+ {
+ struct ubiblock *next;
+@@ -644,6 +682,10 @@ int __init ubiblock_init(void)
+ if (ret)
+ goto err_remove;
+
++ /* auto-attach "rootfs" volume if existing and non-ubifs */
++ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV))
++ ubiblock_create_auto_rootfs();
++
+ /*
+ * Block devices are only created upon user requests, so we ignore
+ * existing volumes.