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Add x-systemd.growfs option for fstab

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2017-11-29 20:02:11 +01:00
parent da495a0385
commit 7f2806d509
4 changed files with 77 additions and 5 deletions
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1
meson.build
View File

@ -183,6 +183,7 @@ conf.set_quoted('SYSTEMD_CGROUP_AGENT_PATH', join_paths(rootlib
conf.set_quoted('SYSTEMD_BINARY_PATH', join_paths(rootlibexecdir, 'systemd'))
conf.set_quoted('SYSTEMD_FSCK_PATH', join_paths(rootlibexecdir, 'systemd-fsck'))
conf.set_quoted('SYSTEMD_MAKEFS_PATH', join_paths(rootlibexecdir, 'systemd-makefs'))
conf.set_quoted('SYSTEMD_GROWFS_PATH', join_paths(rootlibexecdir, 'systemd-growfs'))
conf.set_quoted('SYSTEMD_SHUTDOWN_BINARY_PATH', join_paths(rootlibexecdir, 'systemd-shutdown'))
conf.set_quoted('SYSTEMD_SLEEP_BINARY_PATH', join_paths(rootlibexecdir, 'systemd-sleep'))
conf.set_quoted('SYSTEMCTL_BINARY_PATH', join_paths(rootbindir, 'systemctl'))

22
src/fstab-generator/fstab-generator.c
View File

@ -52,6 +52,7 @@ typedef enum MountpointFlags {
NOFAIL = 1 << 1,
AUTOMOUNT = 1 << 2,
MAKEFS = 1 << 3,
GROWFS = 1 << 4,
} MountpointFlags;
static const char *arg_dest = "/tmp";
@ -162,6 +163,10 @@ static int add_swap(
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);
@ -459,6 +464,12 @@ static int add_mount(
return r;
}
if (flags & GROWFS) {
r = generator_hook_up_growfs(dest, where, post);
if (r < 0)
return r;
}
if (!(flags & NOAUTO) && !(flags & AUTOMOUNT)) {
r = generator_add_symlink(dest, post,
(flags & NOFAIL) ? "wants" : "requires", name);
@ -544,7 +555,7 @@ static int parse_fstab(bool initrd) {
while ((me = getmntent(f))) {
_cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL;
bool makefs, noauto, nofail;
bool makefs, growfs, noauto, nofail;
int k;
if (initrd && !mount_in_initrd(me))
@ -587,6 +598,7 @@ static int parse_fstab(bool initrd) {
}
makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0");
growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0");
noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0");
log_debug("Found entry what=%s where=%s type=%s makefs=%s nofail=%s noauto=%s",
@ -596,7 +608,7 @@ static int parse_fstab(bool initrd) {
if (streq(me->mnt_type, "swap"))
k = add_swap(what, me,
makefs*MAKEFS | noauto*NOAUTO | nofail*NOFAIL);
makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL);
else {
bool automount;
const char *post;
@ -618,12 +630,12 @@ static int parse_fstab(bool initrd) {
me->mnt_type,
me->mnt_opts,
me->mnt_passno,
makefs*MAKEFS | noauto*NOAUTO | nofail*NOFAIL | automount*AUTOMOUNT,
makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL | automount*AUTOMOUNT,
post,
fstab_path);
}
if (k < 0)
if (r >= 0 && k < 0)
r = k;
}
@ -679,7 +691,7 @@ static int add_sysroot_mount(void) {
arg_root_fstype,
opts,
is_device_path(what) ? 1 : 0, /* passno */
0, /* makefs off, noauto off, nofail off, automount off */
0, /* makefs off, growfs off, noauto off, nofail off, automount off */
SPECIAL_INITRD_ROOT_FS_TARGET,
"/proc/cmdline");
}

55
src/shared/generator.c
View File

@ -427,3 +427,58 @@ int generator_hook_up_mkfs(
return generator_add_symlink(dir, where_unit, "requires", unit);
}
int generator_hook_up_growfs(
const char *dir,
const char *where,
const char *target) {
_cleanup_free_ char *unit = NULL, *escaped = NULL, *where_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit_file;
int r;
escaped = cescape(where);
if (!escaped)
return log_oom();
r = unit_name_from_path_instance("systemd-growfs", where, ".service", &unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
where);
r = unit_name_from_path(where, ".mount", &where_unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
where);
unit_file = strjoina(dir, "/", unit);
log_debug("Creating %s", unit_file);
f = fopen(unit_file, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m",
unit_file);
fprintf(f,
"# Automatically generated by %s\n\n"
"[Unit]\n"
"Description=Grow File System on %%f\n"
"Documentation=man:systemd-growfs@.service(8)\n"
"DefaultDependencies=no\n"
"BindsTo=%%i.mount\n"
"After=%%i.mount\n"
"Before=shutdown.target\n"
"Before=%s\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart="SYSTEMD_GROWFS_PATH " %s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
target,
escaped);
return generator_add_symlink(dir, where_unit, "wants", unit);
}

4
src/shared/generator.h
View File

@ -56,3 +56,7 @@ int generator_hook_up_mkfs(
const char *what,
const char *where,
const char *type);
int generator_hook_up_growfs(
const char *dir,
const char *where,
const char *target);