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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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45
target/linux/generic/files/block/partitions/fit.c
View File

@ -67,17 +67,20 @@
#define FIT_MAX_HASH_LEN HASH_MAX_DIGEST_SIZE
int fit_partition(struct parsed_partitions *state)
#define MIN_FREE_SECT 16
#define REMAIN_VOLNAME "rootfs_data"
int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector, u64 sectors, int *slot, int add_remain)
{
struct address_space *mapping = state->bdev->bd_inode->i_mapping;
struct page *page = read_mapping_page(mapping, 0, NULL);
struct page *page;
void *fit, *init_fit;
struct partition_meta_info *info;
char tmp[sizeof(info->volname)];
u64 dsize, dsectors;
u64 dsize, dsectors, imgmaxsect = 0;
u32 size, image_pos, image_len;
const u32 *image_offset_be, *image_len_be, *image_pos_be;
int ret = 1, node, images, config, slot;
int ret = 1, node, images, config;
const char *image_name, *image_type, *image_description, *config_default,
*config_description, *config_loadables;
int image_name_len, image_type_len, image_description_len, config_default_len,
@ -85,6 +88,10 @@ int fit_partition(struct parsed_partitions *state)
sector_t start_sect, nr_sects;
size_t label_min;
if (fit_start_sector % (1<<(PAGE_SHIFT - SECTOR_SHIFT)))
return -ERANGE;
page = read_mapping_page(mapping, fit_start_sector >> (PAGE_SHIFT - SECTOR_SHIFT), NULL);
if (!page)
return -ENOMEM;
@ -101,6 +108,9 @@ int fit_partition(struct parsed_partitions *state)
}
dsectors = get_capacity(state->bdev->bd_disk);
if (sectors)
dsectors = (dsectors>sectors)?sectors:dsectors;
dsize = dsectors << SECTOR_SHIFT;
printk(KERN_DEBUG "FIT: volume size: %llu sectors (%llu bytes)\n", dsectors, dsize);
@ -158,7 +168,6 @@ int fit_partition(struct parsed_partitions *state)
goto ret_out;
}
slot = 1;
fdt_for_each_subnode(node, fit, images) {
image_name = fdt_get_name(fit, node, &image_name_len);
image_type = fdt_getprop(fit, node, FIT_TYPE_PROP, &image_type_len);
@ -200,15 +209,16 @@ int fit_partition(struct parsed_partitions *state)
start_sect = image_pos >> SECTOR_SHIFT;
nr_sects = image_len >> SECTOR_SHIFT;
imgmaxsect = (imgmaxsect < (start_sect + nr_sects))?(start_sect + nr_sects):imgmaxsect;
if (start_sect + nr_sects > dsectors) {
state->access_beyond_eod = 1;
continue;
}
put_partition(state, slot, start_sect, nr_sects);
state->parts[slot].flags = 0;
info = &state->parts[slot].info;
put_partition(state, ++(*slot), fit_start_sector + start_sect, nr_sects);
state->parts[*slot].flags = 0;
info = &state->parts[*slot].info;
label_min = min_t(int, sizeof(info->volname) - 1, image_name_len);
strncpy(info->volname, image_name, label_min);
@ -217,17 +227,28 @@ int fit_partition(struct parsed_partitions *state)
snprintf(tmp, sizeof(tmp), "(%s)", info->volname);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
state->parts[slot].has_info = true;
state->parts[*slot].has_info = true;
if (config_loadables && !strcmp(image_name, config_loadables)) {
printk(KERN_DEBUG "FIT: selecting configured loadable %s to be root filesystem\n", image_name);
state->parts[slot].flags |= ADDPART_FLAG_ROOTDEV;
state->parts[*slot].flags |= ADDPART_FLAG_ROOTDEV;
}
++slot;
}
if (add_remain && (imgmaxsect + MIN_FREE_SECT) < dsectors) {
put_partition(state, ++(*slot), fit_start_sector + imgmaxsect, dsectors - imgmaxsect);
state->parts[*slot].flags = 0;
info = &state->parts[*slot].info;
strcpy(info->volname, REMAIN_VOLNAME);
snprintf(tmp, sizeof(tmp), "(%s)", REMAIN_VOLNAME);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
}
ret_out:
kfree(fit);
return ret;
}
int fit_partition(struct parsed_partitions *state) {
int slot = 0;
return parse_fit_partitions(state, 0, 0, &slot, 0);
}

110
target/linux/generic/hack-5.10/400-block-fit-partition-parser.patch
View File

@ -44,18 +44,26 @@
int ibm_partition(struct parsed_partitions *);
int karma_partition(struct parsed_partitions *state);
int ldm_partition(struct parsed_partitions *state);
@@ -68,3 +69,5 @@ 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
@@ -10,6 +10,8 @@
@@ -10,6 +10,10 @@
#include <linux/vmalloc.h>
#include <linux/blktrace_api.h>
#include <linux/raid/detect.h>
+#ifdef CONFIG_FIT_PARTITION
+#include <linux/root_dev.h>
+#endif
+
#include "check.h"
static int (*check_part[])(struct parsed_partitions *) = {
@@ -46,6 +48,9 @@ static int (*check_part[])(struct parsed
@@ -46,6 +50,9 @@ static int (*check_part[])(struct parsed
#ifdef CONFIG_EFI_PARTITION
efi_partition, /* this must come before msdos */
#endif
@ -65,12 +73,49 @@
#ifdef CONFIG_SGI_PARTITION
sgi_partition,
#endif
@@ -694,6 +699,9 @@ static bool blk_add_partition(struct gen
@@ -215,6 +222,18 @@ static ssize_t part_discard_alignment_sh
p->start_sect));
}
+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);
@@ -223,6 +242,7 @@ 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);
@@ -237,6 +257,7 @@ 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
@@ -694,6 +715,11 @@ static bool blk_add_partition(struct gen
(state->parts[p].flags & ADDPART_FLAG_RAID))
md_autodetect_dev(part_to_dev(part)->devt);
+#ifdef CONFIG_FIT_PARTITION
+ if ((state->parts[p].flags & ADDPART_FLAG_ROOTDEV) && ROOT_DEV == 0)
+ ROOT_DEV = part_to_dev(part)->devt;
+#endif
+
return true;
}
@ -94,3 +139,62 @@
sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
set_capacity(gd, disk_capacity);
dev->gd = gd;
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -704,7 +704,7 @@ 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) {
@@ -722,23 +722,30 @@ 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. */
label_max = min(ARRAY_SIZE(info->volname) - 1,
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;
+ 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;

109
target/linux/generic/hack-5.4/400-block-fit-partition-parser.patch
View File

@ -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;