static int add_swap(
const char *what,
struct mntent *me,
bool noauto,
bool nofail) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL, *filtered = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r, pri = -1;
const char *opts;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container(NULL) > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
opts = me->mnt_opts;
r = fstab_find_pri(opts, &pri);
if (r < 0) {
log_error_errno(r, "Failed to parse priority, ignoring: %m");
/* Remove invalid pri field */
r = fstab_filter_options(opts, "pri\0", NULL, NULL, &filtered);
if (r < 0)
return log_error_errno(r, "Failed to parse options: %m");
opts = filtered;
}
name = unit_name_from_path(what, ".swap");
if (!name)
return log_oom();
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f) {
if (errno == EEXIST)
log_error("Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
else
log_error_errno(errno, "Failed to create unit file %s: %m", unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
/* Note that we currently pass the priority field twice, once
* in Priority=, and once in Options= */
if (pri >= 0)
fprintf(f, "Priority=%i\n", pri);
if (!isempty(opts) && !streq(opts, "defaults"))
fprintf(f, "Options=%s\n", opts);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, opts, NULL);
if (r < 0)
return r;
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
nofail ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int add_swap(
const char *what,
struct mntent *me,
bool noauto,
bool nofail) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container() > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
r = unit_name_from_path(what, ".swap", &name);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
unit = strjoin(arg_dest, "/", name);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f)
return log_error_errno(errno,
errno == EEXIST ?
"Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
"Failed to create unit file %s: %m",
unit);
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
if (!isempty(me->mnt_opts) && !streq(me->mnt_opts, "defaults"))
fprintf(f, "Options=%s\n", me->mnt_opts);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
if (r < 0)
return r;
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
nofail ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int add_mount(
const char *what,
const char *where,
const char *fstype,
const char *opts,
int passno,
bool noauto,
bool nofail,
bool automount,
const char *post,
const char *source) {
_cleanup_free_ char
*name = NULL, *unit = NULL, *lnk = NULL,
*automount_name = NULL, *automount_unit = NULL,
*filtered = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(where);
assert(opts);
assert(source);
if (streq_ptr(fstype, "autofs"))
return 0;
if (!is_path(where)) {
log_warning("Mount point %s is not a valid path, ignoring.", where);
return 0;
}
if (mount_point_is_api(where) ||
mount_point_ignore(where))
return 0;
if (path_equal(where, "/")) {
/* The root disk is not an option */
automount = false;
noauto = false;
nofail = false;
}
name = unit_name_from_path(where, ".mount");
if (!name)
return log_oom();
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f) {
if (errno == EEXIST)
log_error("Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
else
log_error_errno(errno, "Failed to create unit file %s: %m", unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
source);
if (post && !noauto && !nofail && !automount)
fprintf(f, "Before=%s\n", post);
if (passno != 0) {
r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
if (r < 0)
return r;
}
fprintf(f,
"\n"
"[Mount]\n"
"What=%s\n"
"Where=%s\n",
what,
where);
if (!isempty(fstype) && !streq(fstype, "auto"))
fprintf(f, "Type=%s\n", fstype);
r = generator_write_timeouts(arg_dest, what, where, opts, &filtered);
if (r < 0)
return r;
if (!isempty(filtered) && !streq(filtered, "defaults"))
fprintf(f, "Options=%s\n", filtered);
fflush(f);
if (ferror(f))
return log_error_errno(errno, "Failed to write unit file %s: %m", unit);
if (!noauto && post) {
lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
if (automount) {
automount_name = unit_name_from_path(where, ".automount");
if (!automount_name)
return log_oom();
automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
if (!automount_unit)
return log_oom();
fclose(f);
f = fopen(automount_unit, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", automount_unit);
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
source);
if (post)
fprintf(f,
"Before=%s\n",
post);
fprintf(f,
"[Automount]\n"
"Where=%s\n",
where);
fflush(f);
if (ferror(f))
return log_error_errno(errno, "Failed to write unit file %s: %m", automount_unit);
free(lnk);
lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(automount_unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int create_disk(
const char *name,
const char *device,
const char *password,
const char *options) {
_cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *to = NULL, *e = NULL,
*filtered = NULL;
_cleanup_fclose_ FILE *f = NULL;
bool noauto, nofail, tmp, swap;
char *from;
int r;
assert(name);
assert(device);
noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
tmp = fstab_test_option(options, "tmp\0");
swap = fstab_test_option(options, "swap\0");
if (tmp && swap) {
log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);
return -EINVAL;
}
e = unit_name_escape(name);
if (!e)
return log_oom();
r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", n, NULL);
if (!p)
return log_oom();
u = fstab_node_to_udev_node(device);
if (!u)
return log_oom();
r = unit_name_from_path(u, ".device", &d);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", p);
fputs(
"# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %I\n"
"Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:[email protected](8)\n"
"SourcePath=/etc/crypttab\n"
"DefaultDependencies=no\n"
"Conflicts=umount.target\n"
"BindsTo=dev-mapper-%i.device\n"
"IgnoreOnIsolate=true\n"
"After=cryptsetup-pre.target\n",
f);
if (!nofail)
fprintf(f,
"Before=cryptsetup.target\n");
if (password) {
if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
fputs("After=systemd-random-seed.service\n", f);
else if (!streq(password, "-") && !streq(password, "none")) {
_cleanup_free_ char *uu;
uu = fstab_node_to_udev_node(password);
if (!uu)
return log_oom();
if (!path_equal(uu, "/dev/null")) {
if (is_device_path(uu)) {
_cleanup_free_ char *dd = NULL;
r = unit_name_from_path(uu, ".device", &dd);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
fprintf(f, "After=%1$s\nRequires=%1$s\n", dd);
} else
fprintf(f, "RequiresMountsFor=%s\n", password);
}
}
}
if (is_device_path(u))
fprintf(f,
"BindsTo=%s\n"
"After=%s\n"
"Before=umount.target\n",
d, d);
else
fprintf(f,
"RequiresMountsFor=%s\n",
u);
r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
if (r < 0)
return r;
fprintf(f,
"\n[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
name, u, strempty(password), strempty(filtered),
name);
if (tmp)
fprintf(f,
"ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
name);
if (swap)
fprintf(f,
"ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
name);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write file %s: %m", p);
from = strjoina("../", n);
if (!noauto) {
to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
free(to);
if (!nofail)
to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
else
to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
}
free(to);
to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
if (!noauto && !nofail) {
_cleanup_free_ char *dmname;
dmname = strjoin("dev-mapper-", e, ".device", NULL);
if (!dmname)
return log_oom();
r = write_drop_in(arg_dest, dmname, 90, "device-timeout",
"# Automatically generated by systemd-cryptsetup-generator \n\n"
"[Unit]\nJobTimeoutSec=0");
if (r < 0)
return log_error_errno(r, "Failed to write device drop-in: %m");
}
return 0;
}
static int add_swap(const char *what, struct mntent *me) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *discard = NULL;
bool noauto;
int r, pri = -1;
assert(what);
assert(me);
if (detect_container(NULL) > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
r = mount_find_pri(me, &pri);
if (r < 0) {
log_error("Failed to parse priority");
return r;
}
r = mount_find_discard(me, &discard);
if (r < 0) {
log_error("Failed to parse discard");
return r;
}
noauto = !!hasmntopt(me, "noauto");
name = unit_name_from_path(what, ".swap");
if (!name)
return log_oom();
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f) {
if (errno == EEXIST)
log_error("Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
else
log_error("Failed to create unit file %s: %m", unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
if (pri >= 0)
fprintf(f, "Priority=%i\n", pri);
if (discard)
fprintf(f, "Discard=%s\n", discard);
fflush(f);
if (ferror(f)) {
log_error("Failed to write unit file %s: %m", unit);
return -errno;
}
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
if (r < 0)
return r;
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0) {
log_error("Failed to create symlink %s: %m", lnk);
return -errno;
}
}
return 0;
}
static int add_swap(
const char *what,
struct mntent *me,
MountpointFlags flags) {
_cleanup_free_ char *name = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container() > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
r = unit_name_from_path(what, ".swap", &name);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
r = generator_open_unit_file(arg_dest, "/etc/fstab", name, &f);
if (r < 0)
return r;
fputs("# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n", f);
r = write_what(f, what);
if (r < 0)
return r;
r = write_options(f, me->mnt_opts);
if (r < 0)
return r;
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", name);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
if (r < 0)
return r;
if (flags & MAKEFS) {
r = generator_hook_up_mkswap(arg_dest, what);
if (r < 0)
return r;
}
if (flags & GROWFS)
/* TODO: swap devices must be wiped and recreated */
log_warning("%s: growing swap devices is currently unsupported.", what);
if (!(flags & NOAUTO)) {
r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET,
(flags & NOFAIL) ? "wants" : "requires", name);
if (r < 0)
return r;
}
return 0;
}
static int create_disk(
const char *name,
const char *device,
const char *password,
const char *options) {
_cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *e = NULL,
*filtered = NULL, *u_escaped = NULL, *password_escaped = NULL, *filtered_escaped = NULL, *name_escaped = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *dmname;
bool noauto, nofail, tmp, swap, netdev;
int r;
assert(name);
assert(device);
noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
tmp = fstab_test_option(options, "tmp\0");
swap = fstab_test_option(options, "swap\0");
netdev = fstab_test_option(options, "_netdev\0");
if (tmp && swap) {
log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);
return -EINVAL;
}
name_escaped = specifier_escape(name);
if (!name_escaped)
return log_oom();
e = unit_name_escape(name);
if (!e)
return log_oom();
r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", n);
if (!p)
return log_oom();
u = fstab_node_to_udev_node(device);
if (!u)
return log_oom();
u_escaped = specifier_escape(u);
if (!u_escaped)
return log_oom();
r = unit_name_from_path(u, ".device", &d);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
password_escaped = specifier_escape(password);
if (!password_escaped)
return log_oom();
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", p);
fprintf(f,
"# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %%I\n"
"Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:[email protected](8)\n"
"SourcePath=/etc/crypttab\n"
"DefaultDependencies=no\n"
"Conflicts=umount.target\n"
"IgnoreOnIsolate=true\n"
"After=%s\n",
netdev ? "remote-fs-pre.target" : "cryptsetup-pre.target");
if (!nofail)
fprintf(f,
"Before=%s\n",
netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
if (password) {
if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
fputs_unlocked("After=systemd-random-seed.service\n", f);
else if (!STR_IN_SET(password, "-", "none")) {
_cleanup_free_ char *uu;
uu = fstab_node_to_udev_node(password);
if (!uu)
return log_oom();
if (!path_equal(uu, "/dev/null")) {
if (path_startswith(uu, "/dev/")) {
_cleanup_free_ char *dd = NULL;
r = unit_name_from_path(uu, ".device", &dd);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
fprintf(f, "After=%1$s\nRequires=%1$s\n", dd);
} else
fprintf(f, "RequiresMountsFor=%s\n", password_escaped);
}
}
}
if (path_startswith(u, "/dev/")) {
fprintf(f,
"BindsTo=%s\n"
"After=%s\n"
"Before=umount.target\n",
d, d);
if (swap)
fputs_unlocked("Before=dev-mapper-%i.swap\n",
f);
} else
fprintf(f,
"RequiresMountsFor=%s\n",
u_escaped);
r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
if (r < 0)
return r;
filtered_escaped = specifier_escape(filtered);
if (!filtered_escaped)
return log_oom();
fprintf(f,
"\n[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
"KeyringMode=shared\n" /* make sure we can share cached keys among instances */
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
name_escaped, u_escaped, strempty(password_escaped), strempty(filtered_escaped),
name_escaped);
if (tmp)
fprintf(f,
"ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
name_escaped);
if (swap)
fprintf(f,
"ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
name_escaped);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write file %s: %m", p);
if (!noauto) {
r = generator_add_symlink(arg_dest, d, "wants", n);
if (r < 0)
return r;
r = generator_add_symlink(arg_dest,
netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
nofail ? "wants" : "requires", n);
if (r < 0)
return r;
}
dmname = strjoina("dev-mapper-", e, ".device");
r = generator_add_symlink(arg_dest, dmname, "requires", n);
if (r < 0)
return r;
if (!noauto && !nofail) {
r = write_drop_in(arg_dest, dmname, 90, "device-timeout",
"# Automatically generated by systemd-cryptsetup-generator \n\n"
"[Unit]\nJobTimeoutSec=0");
if (r < 0)
return log_error_errno(r, "Failed to write device drop-in: %m");
}
return 0;
}
