diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libzfs/libzfs_pool.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c index e7a9a0011..214c57ab4 100644 --- a/lib/libzfs/libzfs_pool.c +++ b/lib/libzfs/libzfs_pool.c @@ -4171,6 +4171,32 @@ zpool_label_disk_check(char *path) } /* + * Generate a unique partition name for the ZFS member. Partitions must + * have unique names to ensure udev will be able to create symlinks under + * /dev/disk/by-partlabel/ for all pool members. The partition names are + * of the form <pool>-<unique-id>. + */ +static void +zpool_label_name(char *label_name, int label_size) +{ + uint64_t id = 0; + int fd; + + fd = open("/dev/urandom", O_RDONLY); + if (fd > 0) { + if (read(fd, &id, sizeof (id)) != sizeof (id)) + id = 0; + + close(fd); + } + + if (id == 0) + id = (((uint64_t)rand()) << 32) | (uint64_t)rand(); + + snprintf(label_name, label_size, "zfs-%016llx", (u_longlong_t) id); +} + +/* * Label an individual disk. The name provided is the short name, * stripped of any leading /dev path. */ @@ -4260,7 +4286,7 @@ zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, char *name) * can get, in the absence of V_OTHER. */ vtoc->efi_parts[0].p_tag = V_USR; - (void) strcpy(vtoc->efi_parts[0].p_name, "zfs"); + zpool_label_name(vtoc->efi_parts[0].p_name, EFI_PART_NAME_LEN); vtoc->efi_parts[8].p_start = slice_size + start_block; vtoc->efi_parts[8].p_size = resv; |