[PATCH v3 12/43] part: Allow setting the partition-table type
Simon Glass
sjg at chromium.org
Fri May 5 00:57:58 CEST 2023
Some devices have multiple partition types available on the same media.
It is sometimes useful to see these to check that everything is working
correctly.
Provide a way to manually set the partition-table type, avoiding the
auto-detection process.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
(no changes since v1)
cmd/part.c | 34 +++++++++++++++++++
disk/part.c | 16 +++++++++
doc/usage/cmd/part.rst | 74 ++++++++++++++++++++++++++++++++++++++++++
include/part.h | 9 +++++
4 files changed, 133 insertions(+)
diff --git a/cmd/part.c b/cmd/part.c
index 28f2b7ff9bb..0ce190005d3 100644
--- a/cmd/part.c
+++ b/cmd/part.c
@@ -182,6 +182,36 @@ static int do_part_number(int argc, char *const argv[])
return do_part_info(argc, argv, CMD_PART_INFO_NUMBER);
}
+static int do_part_set(int argc, char *const argv[])
+{
+ const char *devname, *partstr, *typestr;
+ struct blk_desc *desc;
+ int dev;
+
+ if (argc < 3)
+ return CMD_RET_USAGE;
+
+ /* Look up the device */
+ devname = argv[0];
+ partstr = argv[1];
+ typestr = argv[2];
+ dev = blk_get_device_by_str(devname, partstr, &desc);
+ if (dev < 0) {
+ printf("** Bad device specification %s %s **\n", devname,
+ partstr);
+ return CMD_RET_FAILURE;
+ }
+
+ desc->part_type = part_get_type_by_name(typestr);
+ if (!desc->part_type) {
+ printf("Unknown partition type '%s'\n", typestr);
+ return CMD_RET_FAILURE;
+ }
+ part_print(desc);
+
+ return 0;
+}
+
#ifdef CONFIG_PARTITION_TYPE_GUID
static int do_part_type(int argc, char *const argv[])
{
@@ -245,6 +275,8 @@ static int do_part(struct cmd_tbl *cmdtp, int flag, int argc,
return do_part_number(argc - 2, argv + 2);
else if (!strcmp(argv[1], "types"))
return do_part_types(argc - 2, argv + 2);
+ else if (!strcmp(argv[1], "set"))
+ return do_part_set(argc - 2, argv + 2);
#ifdef CONFIG_PARTITION_TYPE_GUID
else if (!strcmp(argv[1], "type"))
return do_part_type(argc - 2, argv + 2);
@@ -279,6 +311,8 @@ U_BOOT_CMD(
#endif
"part type <interface> <dev>:<part> <varname>\n"
" - set environment variable to partition type\n"
+ "part set <interface> <dev> type\n"
+ " - set partition type for a device\n"
"part types\n"
" - list supported partition table types"
);
diff --git a/disk/part.c b/disk/part.c
index 35300df5903..1d2117ab71e 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -54,6 +54,22 @@ static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
return NULL;
}
+int part_get_type_by_name(const char *name)
+{
+ struct part_driver *drv =
+ ll_entry_start(struct part_driver, part_driver);
+ const int n_ents = ll_entry_count(struct part_driver, part_driver);
+ struct part_driver *entry;
+
+ for (entry = drv; entry != drv + n_ents; entry++) {
+ if (!strcasecmp(name, entry->name))
+ return entry->part_type;
+ }
+
+ /* Not found */
+ return PART_TYPE_UNKNOWN;
+}
+
static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
{
struct blk_desc *dev_desc;
diff --git a/doc/usage/cmd/part.rst b/doc/usage/cmd/part.rst
index 8d2a2803912..8a594aaff27 100644
--- a/doc/usage/cmd/part.rst
+++ b/doc/usage/cmd/part.rst
@@ -13,6 +13,7 @@ Synopis
part start <interface> <dev> <part> <varname>
part size <interface> <dev> <part> <varname>
part number <interface> <dev> <part> <varname>
+ part set <interface> <dev> <part> <type>
part type <interface> <dev>:<part> [varname]
part types
@@ -82,6 +83,18 @@ part must be specified as partition name.
varname
a variable to store the current partition number value into
+The 'part set' command sets the type of a partition. This is useful when
+autodetection fails or does not do the correct thing:
+
+ interface
+ interface for accessing the block device (mmc, sata, scsi, usb, ....)
+ dev
+ device number
+ part
+ partition number
+ type
+ partition type to use (see 'part types') to check available types
+
The 'part type' command prints or sets an environment variable to the partition type UUID.
interface
@@ -147,6 +160,67 @@ Examples
=> part types
Supported partition tables: EFI, AMIGA, DOS, ISO, MAC
+This shows looking at a device with multiple partition tables::
+
+ => virtio scan
+ => part list virtio 0
+
+ Partition Map for VirtIO device 0 -- Partition Type: EFI
+
+ Part Start LBA End LBA Name
+ Attributes
+ Type GUID
+ Partition GUID
+ 1 0x00000040 0x0092b093 "ISO9660"
+ attrs: 0x1000000000000001
+ type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ guid: a0891d7e-b930-4513-94d8-f629dbd637b2
+ 2 0x0092b094 0x0092d7e7 "Appended2"
+ attrs: 0x0000000000000000
+ type: c12a7328-f81f-11d2-ba4b-00a0c93ec93b
+ guid: a0891d7e-b930-4513-94db-f629dbd637b2
+ 3 0x0092d7e8 0x0092da3f "Gap1"
+ attrs: 0x1000000000000001
+ type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ guid: a0891d7e-b930-4513-94da-f629dbd637b2
+ => ls virtio 0:3
+ => part types
+ Supported partition tables: EFI, DOS, ISO
+ => part set virtio 0 dos
+
+ Partition Map for VirtIO device 0 -- Partition Type: DOS
+
+ Part Start Sector Num Sectors UUID Type
+ 1 1 9624191 00000000-01 ee
+ => part set virtio 0 iso
+
+ Partition Map for VirtIO device 0 -- Partition Type: ISO
+
+ Part Start Sect x Size Type
+ 1 3020 4 512 U-Boot
+ 2 9613460 10068 512 U-Boot
+ => part set virtio 0 efi
+
+ Partition Map for VirtIO device 0 -- Partition Type: EFI
+
+ Part Start LBA End LBA Name
+ Attributes
+ Type GUID
+ Partition GUID
+ 1 0x00000040 0x0092b093 "ISO9660"
+ attrs: 0x1000000000000001
+ type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ guid: a0891d7e-b930-4513-94d8-f629dbd637b2
+ 2 0x0092b094 0x0092d7e7 "Appended2"
+ attrs: 0x0000000000000000
+ type: c12a7328-f81f-11d2-ba4b-00a0c93ec93b
+ guid: a0891d7e-b930-4513-94db-f629dbd637b2
+ 3 0x0092d7e8 0x0092da3f "Gap1"
+ attrs: 0x1000000000000001
+ type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ guid: a0891d7e-b930-4513-94da-f629dbd637b2
+ =>
+
Return value
------------
diff --git a/include/part.h b/include/part.h
index be75c735495..3b1b5398699 100644
--- a/include/part.h
+++ b/include/part.h
@@ -598,6 +598,15 @@ static inline struct part_driver *part_driver_get_first(void)
return ll_entry_start(struct part_driver, part_driver);
}
+/**
+ * part_get_type_by_name() - Get partition type by name
+ *
+ * @name: Name of partition type to look up (not case-sensitive)
+ * Returns: Corresponding partition type (PART_TYPE_...) or PART_TYPE_UNKNOWN if
+ * not known
+ */
+int part_get_type_by_name(const char *name);
+
#else
static inline int part_driver_get_count(void)
{ return 0; }
--
2.40.1.521.gf1e218fcd8-goog
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