[PATCH 25/26] commands: parted: prepare use of non-512-byte sectors

Ahmad Fatoum a.fatoum at barebox.org
Fri Jun 26 01:42:36 PDT 2026


Switching parted to create non-512-byte sectors needs a bit more effort
than just switching out all hardcoded SECTOR_SIZE/SHIFT.

Nevertheless, pick these low hanging fruit and defer the rest to some
unknown point in the future.

Assisted-by: Codex:gpt-5.5
Signed-off-by: Ahmad Fatoum <a.fatoum at barebox.org>
---
 commands/createnv.c     | 11 ++++++-----
 commands/parted.c       | 14 +++++++-------
 common/partitions/efi.c |  6 +++---
 3 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/commands/createnv.c b/commands/createnv.c
index 0c74637a114c..6083ab7c2c8f 100644
--- a/commands/createnv.c
+++ b/commands/createnv.c
@@ -69,15 +69,16 @@ static int do_createnv(int argc, char *argv[])
 		goto err;
 	}
 
-	buf = xzalloc(2 * SECTOR_SIZE);
+	buf = xzalloc(2 * BLOCKSIZE(blk));
 
-	ret = cdev_read(cdev, buf, 2 * SECTOR_SIZE, 0, 0);
+	ret = cdev_read(cdev, buf, 2 * BLOCKSIZE(blk), 0, 0);
 	if (ret < 0) {
 		printf("Cannot read from %s: %pe\n", cdev->name, ERR_PTR(ret));
 		goto err;
 	}
 
-	filetype = file_detect_partition_table(buf, 2 * SECTOR_SIZE, SECTOR_SIZE);
+	filetype = file_detect_partition_table(buf, 2 * BLOCKSIZE(blk),
+					       BLOCKSIZE(blk));
 
 	switch (filetype) {
 	case filetype_gpt:
@@ -108,7 +109,7 @@ static int do_createnv(int argc, char *argv[])
 		}
 	}
 
-	size >>= SECTOR_SHIFT;
+	size = blockdevice_round_nblocks(blk, size);
 
 	ret = partition_find_free_space(pdesc, size, &start);
 	if (ret) {
@@ -123,7 +124,7 @@ static int do_createnv(int argc, char *argv[])
 	}
 
 	printf("Will create a barebox environment partition of size %llu bytes on %s\n",
-	       size << SECTOR_SHIFT, cdev->name);
+	       size * BLOCKSIZE(blk), cdev->name);
 
 	if (!force) {
 		char c;
diff --git a/commands/parted.c b/commands/parted.c
index dd79def62a3e..3f531faaef3f 100644
--- a/commands/parted.c
+++ b/commands/parted.c
@@ -109,15 +109,15 @@ static int do_print(struct block_device *blk, int argc, char *argv[])
 	}
 
 	printf("Disk /dev/%s: %s\n", blk->cdev.name,
-	       size_human_readable(blk->num_blocks << SECTOR_SHIFT));
+	       size_human_readable(blockdevice_size(blk)));
 	printf("Partition Table: %s\n", pdesc->parser->name);
 
 	printf("Number      Start           End          Size     Name\n");
 
 	list_for_each_entry(part, &pdesc->partitions, list) {
-		uint64_t start = part->first_sec << SECTOR_SHIFT;
-		uint64_t size = part->size << SECTOR_SHIFT;
-		uint64_t end = start + size - SECTOR_SIZE;
+		uint64_t start = part->first_sec << blk->blockbits;
+		uint64_t size = part->size << blk->blockbits;
+		uint64_t end = start + size - BLOCKSIZE(blk);
 
 		printf(" %3d   %10llu%-3s %10llu%-3s %10llu%-3s  %-36s\n",
 			part->num,
@@ -162,7 +162,7 @@ static int do_mkpart(struct block_device *blk, int argc, char *argv[])
 	start = ALIGN(start, SZ_1M);
 
 	/* convert to LBA */
-	start >>= SECTOR_SHIFT;
+	start = blockdevice_round_nblocks(blk, start);
 
 	if (!strcmp(argv[4], "max")) {
 		/* gpt requires 34 blocks at the end */
@@ -182,7 +182,7 @@ static int do_mkpart(struct block_device *blk, int argc, char *argv[])
 		end *= mult;
 
 		/* convert to LBA */
-		end >>= SECTOR_SHIFT;
+		end >>= blk->blockbits;
 
 		/*
 		 * When unit is >= KB then subtract one sector for user
@@ -235,7 +235,7 @@ static int do_mkpart_size(struct block_device *blk, int argc, char *argv[])
 	size = ALIGN(size, PARTITION_ALIGN_SIZE);
 
 	/* convert to LBA */
-	size >>= SECTOR_SHIFT;
+	size = blockdevice_round_nblocks(blk, size);
 
 	pdesc = pdesc_get(blk);
 	if (!pdesc)
diff --git a/common/partitions/efi.c b/common/partitions/efi.c
index 33d9a1df9e83..18a8c4d56632 100644
--- a/common/partitions/efi.c
+++ b/common/partitions/efi.c
@@ -689,7 +689,7 @@ static __maybe_unused struct partition_desc *efi_partition_create_table(struct b
 
 	partition_desc_init(&epd->pd, blk);
 
-	epd->gpt = xzalloc(SECTOR_SIZE);
+	epd->gpt = xzalloc(BLOCKSIZE(blk));
 	gpt = epd->gpt;
 
 	gpt->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
@@ -851,12 +851,12 @@ static int __efi_partition_write(struct efi_partition_desc *epd, bool primary)
 	uint64_t my_lba, partition_entry_lba;
 	int ret;
 
-	gpt = xmemdup(epd->gpt, SECTOR_SIZE);
+	gpt = xmemdup(epd->gpt, BLOCKSIZE(blk));
 
 	count = le32_to_cpu(gpt->num_partition_entries) *
 		le32_to_cpu(gpt->sizeof_partition_entry);
 
-	size = count / GPT_BLOCK_SIZE;
+	size = blockdevice_round_nblocks(blk, count);
 
 	if (primary) {
 		my_lba = 1;
-- 
2.47.3




More information about the barebox mailing list