From 69357074558daf6ff24c9f58714935e9e095a865 Mon Sep 17 00:00:00 2001 From: OpenWrt community Date: Wed, 13 Jul 2022 13:37:33 +0200 Subject: [PATCH] kernel: add block fit partition parser --- block/blk.h | 2 ++ block/partitions/Kconfig | 7 +++++++ block/partitions/Makefile | 1 + block/partitions/check.h | 3 +++ block/partitions/core.c | 17 +++++++++++++++++ block/partitions/efi.c | 8 ++++++++ block/partitions/efi.h | 3 +++ block/partitions/msdos.c | 10 ++++++++++ drivers/mtd/mtd_blkdevs.c | 2 ++ drivers/mtd/ubi/block.c | 3 +++ include/linux/msdos_partition.h | 1 + 11 files changed, 57 insertions(+) --- a/block/blk.h +++ b/block/blk.h @@ -414,6 +414,8 @@ void blk_free_ext_minor(unsigned int min #define ADDPART_FLAG_NONE 0 #define ADDPART_FLAG_RAID 1 #define ADDPART_FLAG_WHOLEDISK 2 +#define ADDPART_FLAG_READONLY 4 +#define ADDPART_FLAG_ROOTDEV 8 int bdev_add_partition(struct gendisk *disk, int partno, sector_t start, sector_t length); int bdev_del_partition(struct gendisk *disk, int partno); --- a/block/partitions/Kconfig +++ b/block/partitions/Kconfig @@ -103,6 +103,13 @@ config ATARI_PARTITION Say Y here if you would like to use hard disks under Linux which were partitioned under the Atari OS. +config FIT_PARTITION + bool "Flattened-Image-Tree (FIT) partition support" if PARTITION_ADVANCED + default n + help + Say Y here if your system needs to mount the filesystem part of + a Flattened-Image-Tree (FIT) image commonly used with Das U-Boot. + config IBM_PARTITION bool "IBM disk label and partition support" depends on PARTITION_ADVANCED && S390 --- a/block/partitions/Makefile +++ b/block/partitions/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_ACORN_PARTITION) += acorn.o obj-$(CONFIG_AMIGA_PARTITION) += amiga.o obj-$(CONFIG_ATARI_PARTITION) += atari.o obj-$(CONFIG_AIX_PARTITION) += aix.o +obj-$(CONFIG_FIT_PARTITION) += fit.o obj-$(CONFIG_CMDLINE_PARTITION) += cmdline.o obj-$(CONFIG_MAC_PARTITION) += mac.o obj-$(CONFIG_LDM_PARTITION) += ldm.o --- a/block/partitions/check.h +++ b/block/partitions/check.h @@ -57,6 +57,7 @@ int amiga_partition(struct parsed_partit int atari_partition(struct parsed_partitions *state); int cmdline_partition(struct parsed_partitions *state); int efi_partition(struct parsed_partitions *state); +int fit_partition(struct parsed_partitions *state); int ibm_partition(struct parsed_partitions *); int karma_partition(struct parsed_partitions *state); int ldm_partition(struct parsed_partitions *state); @@ -67,3 +68,5 @@ int sgi_partition(struct parsed_partitio int sun_partition(struct parsed_partitions *state); int sysv68_partition(struct parsed_partitions *state); int ultrix_partition(struct parsed_partitions *state); + +int parse_fit_partitions(struct parsed_partitions *state, u64 start_sector, u64 nr_sectors, int *slot, int add_remain); --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -11,6 +11,9 @@ #include #include #include +#ifdef CONFIG_FIT_PARTITION +#include +#endif #include "check.h" @@ -48,6 +51,9 @@ static int (*check_part[])(struct parsed #ifdef CONFIG_EFI_PARTITION efi_partition, /* this must come before msdos */ #endif +#ifdef CONFIG_FIT_PARTITION + fit_partition, +#endif #ifdef CONFIG_SGI_PARTITION sgi_partition, #endif @@ -439,6 +445,11 @@ static struct block_device *add_partitio goto out_del; } +#ifdef CONFIG_FIT_PARTITION + if (flags & ADDPART_FLAG_READONLY) + bdev->bd_read_only = true; +#endif + /* everything is up and running, commence */ err = xa_insert(&disk->part_tbl, partno, bdev, GFP_KERNEL); if (err) @@ -631,6 +642,11 @@ static bool blk_add_partition(struct gen (state->parts[p].flags & ADDPART_FLAG_RAID)) md_autodetect_dev(part->bd_dev); +#ifdef CONFIG_FIT_PARTITION + if ((state->parts[p].flags & ADDPART_FLAG_ROOTDEV) && ROOT_DEV == 0) + ROOT_DEV = part->bd_dev; +#endif + return true; } --- a/block/partitions/efi.c +++ b/block/partitions/efi.c @@ -716,6 +716,9 @@ int efi_partition(struct parsed_partitio gpt_entry *ptes = NULL; u32 i; unsigned ssz = queue_logical_block_size(state->disk->queue) / 512; +#ifdef CONFIG_FIT_PARTITION + u32 extra_slot = 64; +#endif if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) { kfree(gpt); @@ -749,6 +752,11 @@ int efi_partition(struct parsed_partitio ARRAY_SIZE(ptes[i].partition_name)); utf16_le_to_7bit(ptes[i].partition_name, label_max, info->volname); state->parts[i + 1].has_info = true; +#ifdef CONFIG_FIT_PARTITION + /* If this is a U-Boot FIT volume it may have subpartitions */ + if (!efi_guidcmp(ptes[i].partition_type_guid, PARTITION_LINUX_FIT_GUID)) + (void) parse_fit_partitions(state, start * ssz, size * ssz, &extra_slot, 1); +#endif } kfree(ptes); kfree(gpt); --- a/block/partitions/efi.h +++ b/block/partitions/efi.h @@ -51,6 +51,9 @@ #define PARTITION_LINUX_LVM_GUID \ EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) +#define PARTITION_LINUX_FIT_GUID \ + EFI_GUID( 0xcae9be83, 0xb15f, 0x49cc, \ + 0x86, 0x3f, 0x08, 0x1b, 0x74, 0x4a, 0x2d, 0x93) typedef struct _gpt_header { __le64 signature; --- a/block/partitions/msdos.c +++ b/block/partitions/msdos.c @@ -564,6 +564,15 @@ static void parse_minix(struct parsed_pa #endif /* CONFIG_MINIX_SUBPARTITION */ } +static void parse_fit_mbr(struct parsed_partitions *state, + sector_t offset, sector_t size, int origin) +{ +#ifdef CONFIG_FIT_PARTITION + u32 extra_slot = 64; + (void) parse_fit_partitions(state, offset, size, &extra_slot, 1); +#endif /* CONFIG_FIT_PARTITION */ +} + static struct { unsigned char id; void (*parse)(struct parsed_partitions *, sector_t, sector_t, int); @@ -575,6 +584,7 @@ static struct { {UNIXWARE_PARTITION, parse_unixware}, {SOLARIS_X86_PARTITION, parse_solaris_x86}, {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86}, + {FIT_PARTITION, parse_fit_mbr}, {0, NULL}, }; --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -359,7 +359,9 @@ int add_mtd_blktrans_dev(struct mtd_blkt } else { snprintf(gd->disk_name, sizeof(gd->disk_name), "%s%d", tr->name, new->devnum); - gd->flags |= GENHD_FL_NO_PART; + + if (!IS_ENABLED(CONFIG_FIT_PARTITION) || mtd_type_is_nand(new->mtd)) + gd->flags |= GENHD_FL_NO_PART; } set_capacity(gd, ((u64)new->size * tr->blksize) >> 9); --- a/drivers/mtd/ubi/block.c +++ b/drivers/mtd/ubi/block.c @@ -432,7 +432,9 @@ int ubiblock_create(struct ubi_volume_in ret = -ENODEV; goto out_cleanup_disk; } - gd->flags |= GENHD_FL_NO_PART; + if (!IS_ENABLED(CONFIG_FIT_PARTITION)) + gd->flags |= GENHD_FL_NO_PART; + gd->private_data = dev; sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id); set_capacity(gd, disk_capacity); --- a/include/linux/msdos_partition.h +++ b/include/linux/msdos_partition.h @@ -31,6 +31,7 @@ enum msdos_sys_ind { LINUX_LVM_PARTITION = 0x8e, LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */ + FIT_PARTITION = 0x2e, /* U-Boot uImage.FIT */ SOLARIS_X86_PARTITION = 0x82, /* also Linux swap partitions */ NEW_SOLARIS_X86_PARTITION = 0xbf,