| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <unistd.h> |
| |
| #include "id128-util.h" |
| #include "mkfs-util.h" |
| #include "path-util.h" |
| #include "process-util.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "utf8.h" |
| |
| int mkfs_exists(const char *fstype) { |
| const char *mkfs; |
| int r; |
| |
| assert(fstype); |
| |
| if (STR_IN_SET(fstype, "auto", "swap")) /* these aren't real file system types, refuse early */ |
| return -EINVAL; |
| |
| mkfs = strjoina("mkfs.", fstype); |
| if (!filename_is_valid(mkfs)) /* refuse file system types with slashes and similar */ |
| return -EINVAL; |
| |
| r = find_executable(mkfs, NULL); |
| if (r == -ENOENT) |
| return false; |
| if (r < 0) |
| return r; |
| |
| return true; |
| } |
| |
| static int mangle_linux_fs_label(const char *s, size_t max_len, char **ret) { |
| /* Not more than max_len bytes (12 or 16) */ |
| |
| assert(s); |
| assert(max_len > 0); |
| assert(ret); |
| |
| const char *q; |
| char *ans; |
| |
| for (q = s; *q;) { |
| int l; |
| |
| l = utf8_encoded_valid_unichar(q, SIZE_MAX); |
| if (l < 0) |
| return l; |
| |
| if ((size_t) (q - s + l) > max_len) |
| break; |
| q += l; |
| } |
| |
| ans = memdup_suffix0(s, q - s); |
| if (!ans) |
| return -ENOMEM; |
| |
| *ret = ans; |
| return 0; |
| } |
| |
| static int mangle_fat_label(const char *s, char **ret) { |
| assert(s); |
| |
| _cleanup_free_ char *q = NULL; |
| int r; |
| |
| r = utf8_to_ascii(s, '_', &q); |
| if (r < 0) |
| return r; |
| |
| /* Classic FAT only allows 11 character uppercase labels */ |
| strshorten(q, 11); |
| ascii_strupper(q); |
| |
| /* mkfs.vfat: Labels with characters *?.,;:/\|+=<>[]" are not allowed. |
| * Let's also replace any control chars. */ |
| for (char *p = q; *p; p++) |
| if (strchr("*?.,;:/\\|+=<>[]\"", *p) || char_is_cc(*p)) |
| *p = '_'; |
| |
| *ret = TAKE_PTR(q); |
| return 0; |
| } |
| |
| int make_filesystem( |
| const char *node, |
| const char *fstype, |
| const char *label, |
| sd_id128_t uuid, |
| bool discard) { |
| |
| _cleanup_free_ char *mkfs = NULL, *mangled_label = NULL; |
| char vol_id[CONST_MAX(SD_ID128_UUID_STRING_MAX, 8U + 1U)] = {}; |
| int r; |
| |
| assert(node); |
| assert(fstype); |
| assert(label); |
| |
| if (streq(fstype, "swap")) { |
| r = find_executable("mkswap", &mkfs); |
| if (r == -ENOENT) |
| return log_error_errno(SYNTHETIC_ERRNO(EPROTONOSUPPORT), "mkswap binary not available."); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine whether mkswap binary exists: %m"); |
| } else { |
| r = mkfs_exists(fstype); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine whether mkfs binary for %s exists: %m", fstype); |
| if (r == 0) |
| return log_error_errno(SYNTHETIC_ERRNO(EPROTONOSUPPORT), "mkfs binary for %s is not available.", fstype); |
| |
| mkfs = strjoin("mkfs.", fstype); |
| if (!mkfs) |
| return log_oom(); |
| } |
| |
| if (STR_IN_SET(fstype, "ext2", "ext3", "ext4", "xfs", "swap")) { |
| size_t max_len = |
| streq(fstype, "xfs") ? 12 : |
| streq(fstype, "swap") ? 15 : |
| 16; |
| |
| r = mangle_linux_fs_label(label, max_len, &mangled_label); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine volume label from string \"%s\": %m", label); |
| label = mangled_label; |
| |
| } else if (streq(fstype, "vfat")) { |
| r = mangle_fat_label(label, &mangled_label); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine FAT label from string \"%s\": %m", label); |
| label = mangled_label; |
| |
| xsprintf(vol_id, "%08" PRIx32, |
| ((uint32_t) uuid.bytes[0] << 24) | |
| ((uint32_t) uuid.bytes[1] << 16) | |
| ((uint32_t) uuid.bytes[2] << 8) | |
| ((uint32_t) uuid.bytes[3])); /* Take first 32 bytes of UUID */ |
| } |
| |
| if (isempty(vol_id)) |
| assert_se(sd_id128_to_uuid_string(uuid, vol_id)); |
| |
| r = safe_fork("(mkfs)", FORK_RESET_SIGNALS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_LOG|FORK_WAIT|FORK_STDOUT_TO_STDERR, NULL); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| /* Child */ |
| |
| /* When changing this conditional, also adjust the log statement below. */ |
| if (streq(fstype, "ext2")) |
| (void) execlp(mkfs, mkfs, |
| "-q", |
| "-L", label, |
| "-U", vol_id, |
| "-I", "256", |
| "-m", "0", |
| "-E", discard ? "discard,lazy_itable_init=1" : "nodiscard,lazy_itable_init=1", |
| node, NULL); |
| |
| else if (STR_IN_SET(fstype, "ext3", "ext4")) |
| (void) execlp(mkfs, mkfs, |
| "-q", |
| "-L", label, |
| "-U", vol_id, |
| "-I", "256", |
| "-O", "has_journal", |
| "-m", "0", |
| "-E", discard ? "discard,lazy_itable_init=1" : "nodiscard,lazy_itable_init=1", |
| node, NULL); |
| |
| else if (streq(fstype, "btrfs")) { |
| (void) execlp(mkfs, mkfs, |
| "-q", |
| "-L", label, |
| "-U", vol_id, |
| node, |
| discard ? NULL : "--nodiscard", |
| NULL); |
| |
| } else if (streq(fstype, "f2fs")) { |
| (void) execlp(mkfs, mkfs, |
| "-q", |
| "-g", /* "default options" */ |
| "-f", /* force override, without this it doesn't seem to want to write to an empty partition */ |
| "-l", label, |
| "-U", vol_id, |
| "-t", one_zero(discard), |
| node, |
| NULL); |
| |
| } else if (streq(fstype, "xfs")) { |
| const char *j; |
| |
| j = strjoina("uuid=", vol_id); |
| |
| (void) execlp(mkfs, mkfs, |
| "-q", |
| "-L", label, |
| "-m", j, |
| "-m", "reflink=1", |
| node, |
| discard ? NULL : "-K", |
| NULL); |
| |
| } else if (streq(fstype, "vfat")) |
| |
| (void) execlp(mkfs, mkfs, |
| "-i", vol_id, |
| "-n", label, |
| "-F", "32", /* yes, we force FAT32 here */ |
| node, NULL); |
| |
| else if (streq(fstype, "swap")) |
| /* TODO: add --quiet here if |
| * https://github.com/util-linux/util-linux/issues/1499 resolved. */ |
| |
| (void) execlp(mkfs, mkfs, |
| "-L", label, |
| "-U", vol_id, |
| node, NULL); |
| |
| else |
| /* Generic fallback for all other file systems */ |
| (void) execlp(mkfs, mkfs, node, NULL); |
| |
| log_error_errno(errno, "Failed to execute %s: %m", mkfs); |
| |
| _exit(EXIT_FAILURE); |
| } |
| |
| if (STR_IN_SET(fstype, "ext2", "ext3", "ext4", "btrfs", "f2fs", "xfs", "vfat", "swap")) |
| log_info("%s successfully formatted as %s (label \"%s\", uuid %s)", |
| node, fstype, label, vol_id); |
| else |
| log_info("%s successfully formatted as %s (no label or uuid specified)", |
| node, fstype); |
| |
| return 0; |
| } |