mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 18:47:06 +00:00
fc153aa8d9
Similar to supporting nvmem-layouts on MTD devices, also allow referencing UBI and MMC devices in DT. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
78 lines
1.9 KiB
Diff
78 lines
1.9 KiB
Diff
From: Daniel Golle <daniel@makrotopia.org>
|
|
Subject: ubi: auto-create ubiblock device for rootfs
|
|
|
|
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
|
|
@@ -644,10 +644,47 @@ match_volume_desc(struct ubi_volume_info
|
|
return true;
|
|
}
|
|
|
|
+#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(struct ubi_volume_info *vi)
|
|
+{
|
|
+ int ret, is_ubifs;
|
|
+ struct ubi_volume_desc *desc;
|
|
+
|
|
+ if (strcmp(vi->name, "rootfs") &&
|
|
+ strcmp(vi->name, "fit"))
|
|
+ return;
|
|
+
|
|
+ desc = ubi_open_volume(vi->ubi_num, vi->vol_id, UBI_READONLY);
|
|
+ if (IS_ERR(desc))
|
|
+ return;
|
|
+
|
|
+ is_ubifs = ubi_vol_is_ubifs(desc);
|
|
+ ubi_close_volume(desc);
|
|
+ if (is_ubifs)
|
|
+ return;
|
|
+
|
|
+ ret = ubiblock_create(vi);
|
|
+ if (ret)
|
|
+ pr_err("UBI error: block: can't add '%s' volume, err=%d\n",
|
|
+ vi->name, ret);
|
|
+}
|
|
+
|
|
static void
|
|
ubiblock_create_from_param(struct ubi_volume_info *vi)
|
|
{
|
|
int i, ret = 0;
|
|
+ bool got_param = false;
|
|
struct ubiblock_param *p;
|
|
|
|
/*
|
|
@@ -660,6 +697,7 @@ ubiblock_create_from_param(struct ubi_vo
|
|
if (!match_volume_desc(vi, p->name, p->ubi_num, p->vol_id))
|
|
continue;
|
|
|
|
+ got_param = true;
|
|
ret = ubiblock_create(vi);
|
|
if (ret) {
|
|
pr_err(
|
|
@@ -668,6 +706,10 @@ ubiblock_create_from_param(struct ubi_vo
|
|
}
|
|
break;
|
|
}
|
|
+
|
|
+ /* auto-attach "rootfs" volume if existing and non-ubifs */
|
|
+ if (!got_param && IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV))
|
|
+ ubiblock_create_auto_rootfs(vi);
|
|
}
|
|
|
|
static int ubiblock_notify(struct notifier_block *nb,
|