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[5/7] btrfs-progs: mkfs: check if byte_count is zone size aligned

Message ID 20240514005133.44786-6-naohiro.aota@wdc.com (mailing list archive)
State New
Headers show
Series btrfs-progs: zoned: proper "mkfs.btrfs -b" support | expand

Commit Message

Naohiro Aota May 14, 2024, 12:51 a.m. UTC 
Creating a btrfs whose size is not aligned to the zone boundary is
meaningless and allowing it can confuse users. Disallow creating it.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 mkfs/main.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/mkfs/main.c b/mkfs/main.c
index a437ecc40c7f..faf397848cc4 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -1655,6 +1655,11 @@  int BOX_MAIN(mkfs)(int argc, char **argv)
 		      opt_zoned ? "zoned mode " : "", min_dev_size);
 		goto error;
 	}
+	if (byte_count && opt_zoned && !IS_ALIGNED(byte_count, zone_size(file))) {
+		error("size %llu is not aligned to zone size %llu", byte_count,
+		      zone_size(file));
+		goto error;
+	}
 
 	for (i = saved_optind; i < saved_optind + device_count; i++) {
 		char *path;