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77 lines
2.1 KiB
77 lines
2.1 KiB
10 years ago
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--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -18,6 +18,11 @@ config MTD_ROOTFS_ROOT_DEV
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bool "Automatically set 'rootfs' partition to be root filesystem"
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default y
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+config MTD_ROOTFS_SPLIT
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+ bool "Automatically split 'rootfs' partition for squashfs"
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+ select MTD_SPLIT
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+ default y
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+
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config MTD_SPLIT_FIRMWARE
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bool "Automatically split firmware partition for kernel+rootfs"
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default y
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -668,6 +668,47 @@ mtd_pad_erasesize(struct mtd_info *mtd,
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return len;
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}
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+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
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+{
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+ size_t squashfs_len;
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+ int len, ret;
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+
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+ ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
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+ if (ret)
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+ return ret;
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+
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+ len = mtd_pad_erasesize(master, offset, squashfs_len);
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+ *split_offset = offset + len;
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+
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+ return 0;
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+}
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+
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+static void split_rootfs_data(struct mtd_info *master, struct mtd_part *part)
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+{
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+ unsigned int split_offset = 0;
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+ unsigned int split_size;
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+ int ret;
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+
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+ ret = split_squashfs(master, part->offset, &split_offset);
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+ if (ret)
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+ return;
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+
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+ if (split_offset <= 0)
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+ return;
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+
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+ if (config_enabled(CONFIG_MTD_SPLIT_SQUASHFS_ROOT))
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+ pr_err("Dedicated partitioner didn't create \"rootfs_data\" partition, please fill a bug report!\n");
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+ else
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+ pr_warn("Support for built-in \"rootfs_data\" splitter will be removed, please use CONFIG_MTD_SPLIT_SQUASHFS_ROOT\n");
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+
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+ split_size = part->mtd.size - (split_offset - part->offset);
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+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
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+ ROOTFS_SPLIT_NAME, split_offset, split_size);
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+
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+ __mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
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+ split_size, false);
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+}
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+
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#define UBOOT_MAGIC 0x27051956
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static void split_uimage(struct mtd_info *master, struct mtd_part *part)
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@@ -725,7 +766,10 @@ static void mtd_partition_split(struct m
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return;
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if (!strcmp(part->mtd.name, "rootfs")) {
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- run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
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+ int num = run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
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+
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+ if (num <= 0 && config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
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+ split_rootfs_data(master, part);
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rootfs_found = 1;
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}
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