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/* 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"
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;
}
int make_filesystem(
const char *node,
const char *fstype,
const char *label,
sd_id128_t uuid,
bool discard) {
_cleanup_free_ char *mkfs = NULL;
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();
}
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 */
if (streq(fstype, "ext4"))
(void) execlp(mkfs, mkfs,
"-L", label,
"-U", ID128_TO_UUID_STRING(uuid),
"-I", "256",
"-O", "has_journal",
"-m", "0",
"-E", discard ? "lazy_itable_init=1,discard" : "lazy_itable_init=1,nodiscard",
node, NULL);
else if (streq(fstype, "btrfs")) {
if (discard)
(void) execlp(mkfs, mkfs, "-L", label, "-U", ID128_TO_UUID_STRING(uuid), node, NULL);
else
(void) execlp(mkfs, mkfs, "-L", label, "-U", ID128_TO_UUID_STRING(uuid), "--nodiscard", node, NULL);
} else if (streq(fstype, "xfs")) {
const char *j;
j = strjoina("uuid=", ID128_TO_UUID_STRING(uuid));
if (discard)
(void) execlp(mkfs, mkfs, "-L", label, "-m", j, "-m", "reflink=1", node, NULL);
else
(void) execlp(mkfs, mkfs, "-L", label, "-m", j, "-m", "reflink=1", "-K", node, NULL);
} else if (streq(fstype, "vfat")) {
char mangled_label[8 + 3 + 1], vol_id[8 + 1];
/* Classic FAT only allows 11 character uppercase labels */
strncpy(mangled_label, label, sizeof(mangled_label)-1);
mangled_label[sizeof(mangled_label)-1] = 0;
ascii_strupper(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 byte of UUID */
(void) execlp(mkfs, mkfs,
"-i", vol_id,
"-n", mangled_label,
"-F", "32", /* yes, we force FAT32 here */
node, NULL);
} else if (streq(fstype, "swap")) {
(void) execlp(mkfs, mkfs,
"-L", label,
"-U", ID128_TO_UUID_STRING(uuid),
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);
}
return 0;
}
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