From 0964e82f27e32e0a0810832f584d71a4a743baa4 Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Wed, 14 Feb 2024 15:01:53 -0800 Subject: [PATCH] Check for minimum partition size On Linux block devices used for vdevs will by partitioned. The block device must be large enough for an 64M partition starting at offset of 2048 sectors (part1), and a second 64M reserved partition at the end of the device (part9). This commit adds a capacity check when creating the GPT label to immediately detect a device which is too small. With the existing code this would be caught slightly latter when attempting to use the partition. Catching it sooner let's us print a more useful error. Signed-off-by: Brian Behlendorf --- lib/libzfs/os/linux/libzfs_pool_os.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/lib/libzfs/os/linux/libzfs_pool_os.c b/lib/libzfs/os/linux/libzfs_pool_os.c index 401151b1afb5..80f800668ec0 100644 --- a/lib/libzfs/os/linux/libzfs_pool_os.c +++ b/lib/libzfs/os/linux/libzfs_pool_os.c @@ -273,6 +273,15 @@ zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, const char *name) vtoc->efi_parts[0].p_start = start_block; vtoc->efi_parts[0].p_size = slice_size; + if (vtoc->efi_parts[0].p_size * vtoc->efi_lbasize < SPA_MINDEVSIZE) { + (void) close(fd); + efi_free(vtoc); + + zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "partition would " + "be less than the minimum device size (64M)"), path); + return (zfs_error(hdl, EZFS_LABELFAILED, errbuf)); + } + /* * Why we use V_USR: V_BACKUP confuses users, and is considered * disposable by some EFI utilities (since EFI doesn't have a backup