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image: extend FIT partition parser for use on eMMC/SDcard

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Introduce a magic GUID_PARTITION_LINUX_FIT_GUID to designate a GPT
partition to be interpreted by the FIT partition parser.
In that way, sub-partitions for (external-data) uImage.FIT stored
directly in a partition can be split, similar like we do for devices
with raw flash storage.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle
2021-02-27 03:18:46 +00:00
parent dc5328e7e9
commit 6b0295a47d
3 changed files with 245 additions and 19 deletions
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109
target/linux/generic/hack-5.4/400-block-fit-partition-parser.patch
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@@ -45,20 +45,60 @@
dev->gd = gd;
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -18,6 +18,7 @@
@@ -18,6 +18,10 @@
#include <linux/ctype.h>
#include <linux/genhd.h>
#include <linux/blktrace_api.h>
+#ifdef CONFIG_FIT_PARTITION
+#include <linux/root_dev.h>
+#endif
+
#include "partitions/check.h"
@@ -634,6 +635,8 @@ rescan:
@@ -180,6 +184,18 @@ ssize_t part_fail_store(struct device *d
}
#endif
+static ssize_t part_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ if (p->info && p->info->volname)
+ return sprintf(buf, "%s\n", p->info->volname);
+
+ buf[0] = '\0';
+ return 0;
+}
+
static DEVICE_ATTR(partition, 0444, part_partition_show, NULL);
static DEVICE_ATTR(start, 0444, part_start_show, NULL);
static DEVICE_ATTR(size, 0444, part_size_show, NULL);
@@ -188,6 +204,7 @@ static DEVICE_ATTR(alignment_offset, 044
static DEVICE_ATTR(discard_alignment, 0444, part_discard_alignment_show, NULL);
static DEVICE_ATTR(stat, 0444, part_stat_show, NULL);
static DEVICE_ATTR(inflight, 0444, part_inflight_show, NULL);
+static DEVICE_ATTR(name, 0444, part_name_show, NULL);
#ifdef CONFIG_FAIL_MAKE_REQUEST
static struct device_attribute dev_attr_fail =
__ATTR(make-it-fail, 0644, part_fail_show, part_fail_store);
@@ -202,6 +219,7 @@ static struct attribute *part_attrs[] =
&dev_attr_discard_alignment.attr,
&dev_attr_stat.attr,
&dev_attr_inflight.attr,
+ &dev_attr_name.attr,
#ifdef CONFIG_FAIL_MAKE_REQUEST
&dev_attr_fail.attr,
#endif
@@ -634,6 +652,10 @@ rescan:
if (state->parts[p].flags & ADDPART_FLAG_RAID)
md_autodetect_dev(part_to_dev(part)->devt);
#endif
+#ifdef CONFIG_FIT_PARTITION
+ if ((state->parts[p].flags & ADDPART_FLAG_ROOTDEV) && ROOT_DEV == 0)
+ ROOT_DEV = part_to_dev(part)->devt;
+#endif
}
free_partitions(state);
return 0;
@@ -94,6 +134,67 @@
extern void blk_free_devt(dev_t devt);
--- /dev/null
+++ b/block/partitions/fit.h
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+int fit_partition(struct parsed_partitions *);
+int parse_fit_partitions(struct parsed_partitions *state, u64 start_sector, u64 nr_sectors, int *slot, int add_remain);
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -679,7 +679,7 @@ int efi_partition(struct parsed_partitio
{
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
- u32 i;
+ u32 i, slot = 0;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
@@ -698,16 +698,18 @@ int efi_partition(struct parsed_partitio
u64 size = le64_to_cpu(ptes[i].ending_lba) -
le64_to_cpu(ptes[i].starting_lba) + 1ULL;
- if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
+ if (!is_pte_valid(&ptes[i], last_lba(state->bdev))) {
+ ++slot;
continue;
+ }
- put_partition(state, i+1, start * ssz, size * ssz);
+ put_partition(state, ++slot, start * ssz, size * ssz);
/* If this is a RAID volume, tell md */
if (!efi_guidcmp(ptes[i].partition_type_guid, PARTITION_LINUX_RAID_GUID))
- state->parts[i + 1].flags = ADDPART_FLAG_RAID;
+ state->parts[slot].flags = ADDPART_FLAG_RAID;
- info = &state->parts[i + 1].info;
+ info = &state->parts[slot].info;
efi_guid_to_str(&ptes[i].unique_partition_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
@@ -721,7 +723,12 @@ int efi_partition(struct parsed_partitio
info->volname[label_count] = c;
label_count++;
}
- state->parts[i + 1].has_info = true;
+ state->parts[slot].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, &slot, 1);
+#endif
}
kfree(ptes);
kfree(gpt);
--- a/block/partitions/efi.h
+++ b/block/partitions/efi.h
@@ -52,6 +52,9 @@
#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;