diff options
Diffstat (limited to 'src/nspawn')
| -rw-r--r-- | src/nspawn/nspawn-expose-ports.c | 48 | ||||
| -rw-r--r-- | src/nspawn/nspawn-mount.c | 103 | ||||
| -rw-r--r-- | src/nspawn/nspawn-mount.h | 3 | ||||
| -rw-r--r-- | src/nspawn/nspawn-settings.c | 22 | ||||
| -rw-r--r-- | src/nspawn/nspawn-settings.h | 3 | ||||
| -rw-r--r-- | src/nspawn/nspawn.c | 93 |
6 files changed, 159 insertions, 113 deletions
diff --git a/src/nspawn/nspawn-expose-ports.c b/src/nspawn/nspawn-expose-ports.c index 38250b6e02..3658f45381 100644 --- a/src/nspawn/nspawn-expose-ports.c +++ b/src/nspawn/nspawn-expose-ports.c @@ -183,17 +183,8 @@ int expose_port_execute(sd_netlink *rtnl, ExposePort *l, union in_addr_union *ex } int expose_port_send_rtnl(int send_fd) { - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(int))]; - } control = {}; - struct msghdr mh = { - .msg_control = &control, - .msg_controllen = sizeof(control), - }; - struct cmsghdr *cmsg; _cleanup_close_ int fd = -1; - ssize_t k; + int r; assert(send_fd >= 0); @@ -201,19 +192,11 @@ int expose_port_send_rtnl(int send_fd) { if (fd < 0) return log_error_errno(errno, "Failed to allocate container netlink: %m"); - cmsg = CMSG_FIRSTHDR(&mh); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - cmsg->cmsg_len = CMSG_LEN(sizeof(int)); - memcpy(CMSG_DATA(cmsg), &fd, sizeof(int)); - - mh.msg_controllen = cmsg->cmsg_len; - /* Store away the fd in the socket, so that it stays open as * long as we run the child */ - k = sendmsg(send_fd, &mh, MSG_NOSIGNAL); - if (k < 0) - return log_error_errno(errno, "Failed to send netlink fd: %m"); + r = send_one_fd(send_fd, fd, 0); + if (r < 0) + return log_error_errno(r, "Failed to send netlink fd: %m"); return 0; } @@ -224,33 +207,16 @@ int expose_port_watch_rtnl( sd_netlink_message_handler_t handler, union in_addr_union *exposed, sd_netlink **ret) { - - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(int))]; - } control = {}; - struct msghdr mh = { - .msg_control = &control, - .msg_controllen = sizeof(control), - }; - struct cmsghdr *cmsg; _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; int fd, r; - ssize_t k; assert(event); assert(recv_fd >= 0); assert(ret); - k = recvmsg(recv_fd, &mh, MSG_NOSIGNAL); - if (k < 0) - return log_error_errno(errno, "Failed to recv netlink fd: %m"); - - cmsg = CMSG_FIRSTHDR(&mh); - assert(cmsg->cmsg_level == SOL_SOCKET); - assert(cmsg->cmsg_type == SCM_RIGHTS); - assert(cmsg->cmsg_len == CMSG_LEN(sizeof(int))); - memcpy(&fd, CMSG_DATA(cmsg), sizeof(int)); + fd = receive_one_fd(recv_fd, 0); + if (fd < 0) + return log_error_errno(fd, "Failed to recv netlink fd: %m"); r = sd_netlink_open_fd(&rtnl, fd); if (r < 0) { diff --git a/src/nspawn/nspawn-mount.c b/src/nspawn/nspawn-mount.c index 2bca39f45d..65bcb68242 100644 --- a/src/nspawn/nspawn-mount.c +++ b/src/nspawn/nspawn-mount.c @@ -20,6 +20,7 @@ ***/ #include <sys/mount.h> +#include <linux/magic.h> #include "util.h" #include "rm-rf.h" @@ -216,8 +217,67 @@ static int tmpfs_patch_options( return !!buf; } +int mount_sysfs(const char *dest) { + const char *full, *top, *x; + int r; + + top = prefix_roota(dest, "/sys"); + r = path_check_fstype(top, SYSFS_MAGIC); + if (r < 0) + return log_error_errno(r, "Failed to determine filesystem type of %s: %m", top); + /* /sys might already be mounted as sysfs by the outer child in the + * !netns case. In this case, it's all good. Don't touch it because we + * don't have the right to do so, see https://github.com/systemd/systemd/issues/1555. + */ + if (r > 0) + return 0; + + full = prefix_roota(top, "/full"); + + (void) mkdir(full, 0755); + + if (mount("sysfs", full, "sysfs", MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL) < 0) + return log_error_errno(errno, "Failed to mount sysfs to %s: %m", full); + + FOREACH_STRING(x, "block", "bus", "class", "dev", "devices", "kernel") { + _cleanup_free_ char *from = NULL, *to = NULL; + + from = prefix_root(full, x); + if (!from) + return log_oom(); + + to = prefix_root(top, x); + if (!to) + return log_oom(); + + (void) mkdir(to, 0755); + + if (mount(from, to, NULL, MS_BIND, NULL) < 0) + return log_error_errno(errno, "Failed to mount /sys/%s into place: %m", x); + + if (mount(NULL, to, NULL, MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_REMOUNT, NULL) < 0) + return log_error_errno(errno, "Failed to mount /sys/%s read-only: %m", x); + } + + if (umount(full) < 0) + return log_error_errno(errno, "Failed to unmount %s: %m", full); + + if (rmdir(full) < 0) + return log_error_errno(errno, "Failed to remove %s: %m", full); + + x = prefix_roota(top, "/fs/kdbus"); + (void) mkdir(x, 0755); + + if (mount(NULL, top, NULL, MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_REMOUNT, NULL) < 0) + return log_error_errno(errno, "Failed to make %s read-only: %m", top); + + return 0; +} + int mount_all(const char *dest, - bool userns, uid_t uid_shift, uid_t uid_range, + bool use_userns, bool in_userns, + bool use_netns, + uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context) { typedef struct MountPoint { @@ -227,21 +287,23 @@ int mount_all(const char *dest, const char *options; unsigned long flags; bool fatal; - bool userns; + bool in_userns; + bool use_netns; } MountPoint; static const MountPoint mount_table[] = { - { "proc", "/proc", "proc", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, true, true }, - { "/proc/sys", "/proc/sys", NULL, NULL, MS_BIND, true, true }, /* Bind mount first */ - { NULL, "/proc/sys", NULL, NULL, MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_REMOUNT, true, true }, /* Then, make it r/o */ - { "sysfs", "/sys", "sysfs", NULL, MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, true, false }, - { "tmpfs", "/dev", "tmpfs", "mode=755", MS_NOSUID|MS_STRICTATIME, true, false }, - { "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, false }, - { "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, false }, - { "tmpfs", "/tmp", "tmpfs", "mode=1777", MS_STRICTATIME, true, false }, + { "proc", "/proc", "proc", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, true, true, false }, + { "/proc/sys", "/proc/sys", NULL, NULL, MS_BIND, true, true, false }, /* Bind mount first */ + { NULL, "/proc/sys", NULL, NULL, MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_REMOUNT, true, true, false }, /* Then, make it r/o */ + { "tmpfs", "/sys", "tmpfs", "mode=755", MS_NOSUID|MS_NOEXEC|MS_NODEV, true, false, true }, + { "sysfs", "/sys", "sysfs", NULL, MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, true, false, false }, + { "tmpfs", "/dev", "tmpfs", "mode=755", MS_NOSUID|MS_STRICTATIME, true, false, false }, + { "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, false, false }, + { "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, false, false }, + { "tmpfs", "/tmp", "tmpfs", "mode=1777", MS_STRICTATIME, true, false, false }, #ifdef HAVE_SELINUX - { "/sys/fs/selinux", "/sys/fs/selinux", NULL, NULL, MS_BIND, false, false }, /* Bind mount first */ - { NULL, "/sys/fs/selinux", NULL, NULL, MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_REMOUNT, false, false }, /* Then, make it r/o */ + { "/sys/fs/selinux", "/sys/fs/selinux", NULL, NULL, MS_BIND, false, false, false }, /* Bind mount first */ + { NULL, "/sys/fs/selinux", NULL, NULL, MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_REMOUNT, false, false, false }, /* Then, make it r/o */ #endif }; @@ -252,7 +314,10 @@ int mount_all(const char *dest, _cleanup_free_ char *where = NULL, *options = NULL; const char *o; - if (userns != mount_table[k].userns) + if (in_userns != mount_table[k].in_userns) + continue; + + if (!use_netns && mount_table[k].use_netns) continue; where = prefix_root(dest, mount_table[k].where); @@ -278,7 +343,7 @@ int mount_all(const char *dest, o = mount_table[k].options; if (streq_ptr(mount_table[k].type, "tmpfs")) { - r = tmpfs_patch_options(o, userns, uid_shift, uid_range, selinux_apifs_context, &options); + r = tmpfs_patch_options(o, use_userns, uid_shift, uid_range, selinux_apifs_context, &options); if (r < 0) return log_oom(); if (r > 0) @@ -534,7 +599,7 @@ static int mount_legacy_cgroup_hierarchy(const char *dest, const char *controlle char *to; int r; - to = strjoina(dest, "/sys/fs/cgroup/", hierarchy); + to = strjoina(strempty(dest), "/sys/fs/cgroup/", hierarchy); r = path_is_mount_point(to, 0); if (r < 0 && r != -ENOENT) @@ -569,6 +634,8 @@ static int mount_legacy_cgroups( cgroup_root = prefix_roota(dest, "/sys/fs/cgroup"); + (void) mkdir_p(cgroup_root, 0755); + /* Mount a tmpfs to /sys/fs/cgroup if it's not mounted there yet. */ r = path_is_mount_point(cgroup_root, AT_SYMLINK_FOLLOW); if (r < 0) @@ -661,13 +728,15 @@ static int mount_unified_cgroups(const char *dest) { assert(dest); - p = strjoina(dest, "/sys/fs/cgroup"); + p = prefix_roota(dest, "/sys/fs/cgroup"); + + (void) mkdir_p(p, 0755); r = path_is_mount_point(p, AT_SYMLINK_FOLLOW); if (r < 0) return log_error_errno(r, "Failed to determine if %s is mounted already: %m", p); if (r > 0) { - p = strjoina(dest, "/sys/fs/cgroup/cgroup.procs"); + p = prefix_roota(dest, "/sys/fs/cgroup/cgroup.procs"); if (access(p, F_OK) >= 0) return 0; if (errno != ENOENT) diff --git a/src/nspawn/nspawn-mount.h b/src/nspawn/nspawn-mount.h index 5abd44cc4b..bdab23bcca 100644 --- a/src/nspawn/nspawn-mount.h +++ b/src/nspawn/nspawn-mount.h @@ -57,7 +57,8 @@ int tmpfs_mount_parse(CustomMount **l, unsigned *n, const char *s); int custom_mount_compare(const void *a, const void *b); -int mount_all(const char *dest, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context); +int mount_all(const char *dest, bool use_userns, bool in_userns, bool use_netns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context); +int mount_sysfs(const char *dest); int mount_cgroups(const char *dest, bool unified_requested, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context); int mount_systemd_cgroup_writable(const char *dest, bool unified_requested); diff --git a/src/nspawn/nspawn-settings.c b/src/nspawn/nspawn-settings.c index 419f5d1c40..f088884776 100644 --- a/src/nspawn/nspawn-settings.c +++ b/src/nspawn/nspawn-settings.c @@ -85,6 +85,26 @@ Settings* settings_free(Settings *s) { return NULL; } +bool settings_private_network(Settings *s) { + assert(s); + + return + s->private_network > 0 || + s->network_veth > 0 || + s->network_bridge || + s->network_interfaces || + s->network_macvlan || + s->network_ipvlan; +} + +bool settings_network_veth(Settings *s) { + assert(s); + + return + s->network_veth > 0 || + s->network_bridge; +} + DEFINE_CONFIG_PARSE_ENUM(config_parse_volatile_mode, volatile_mode, VolatileMode, "Failed to parse volatile mode"); int config_parse_expose_port( @@ -152,7 +172,7 @@ int config_parse_capability( cap = capability_from_name(word); if (cap < 0) { - log_syntax(unit, LOG_ERR, filename, line, cap, "Failed to parse capability, ignoring: %s", word); + log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse capability, ignoring: %s", word); continue; } diff --git a/src/nspawn/nspawn-settings.h b/src/nspawn/nspawn-settings.h index 4cec40c1b7..16e8c54508 100644 --- a/src/nspawn/nspawn-settings.h +++ b/src/nspawn/nspawn-settings.h @@ -75,6 +75,9 @@ typedef struct Settings { int settings_load(FILE *f, const char *path, Settings **ret); Settings* settings_free(Settings *s); +bool settings_network_veth(Settings *s); +bool settings_private_network(Settings *s); + DEFINE_TRIVIAL_CLEANUP_FUNC(Settings*, settings_free); const struct ConfigPerfItem* nspawn_gperf_lookup(const char *key, unsigned length); diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c index 5702df8ab4..99e24cf4ff 100644 --- a/src/nspawn/nspawn.c +++ b/src/nspawn/nspawn.c @@ -50,7 +50,6 @@ #include "base-filesystem.h" #include "blkid-util.h" #include "btrfs-util.h" -#include "build.h" #include "cap-list.h" #include "capability.h" #include "cgroup-util.h" @@ -84,12 +83,12 @@ #include "udev-util.h" #include "util.h" -#include "nspawn-settings.h" +#include "nspawn-cgroup.h" +#include "nspawn-expose-ports.h" #include "nspawn-mount.h" #include "nspawn-network.h" -#include "nspawn-expose-ports.h" -#include "nspawn-cgroup.h" #include "nspawn-register.h" +#include "nspawn-settings.h" #include "nspawn-setuid.h" typedef enum ContainerStatus { @@ -414,9 +413,7 @@ static int parse_argv(int argc, char *argv[]) { return 0; case ARG_VERSION: - puts(PACKAGE_STRING); - puts(SYSTEMD_FEATURES); - return 0; + return version(); case 'D': r = set_sanitized_path(&arg_directory, optarg); @@ -1264,16 +1261,7 @@ static int setup_dev_console(const char *dest, const char *console) { static int setup_kmsg(const char *dest, int kmsg_socket) { const char *from, *to; _cleanup_umask_ mode_t u; - int fd, k; - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(int))]; - } control = {}; - struct msghdr mh = { - .msg_control = &control, - .msg_controllen = sizeof(control), - }; - struct cmsghdr *cmsg; + int fd, r; assert(kmsg_socket >= 0); @@ -1298,21 +1286,13 @@ static int setup_kmsg(const char *dest, int kmsg_socket) { if (fd < 0) return log_error_errno(errno, "Failed to open fifo: %m"); - cmsg = CMSG_FIRSTHDR(&mh); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - cmsg->cmsg_len = CMSG_LEN(sizeof(int)); - memcpy(CMSG_DATA(cmsg), &fd, sizeof(int)); - - mh.msg_controllen = cmsg->cmsg_len; - /* Store away the fd in the socket, so that it stays open as * long as we run the child */ - k = sendmsg(kmsg_socket, &mh, MSG_NOSIGNAL); + r = send_one_fd(kmsg_socket, fd, 0); safe_close(fd); - if (k < 0) - return log_error_errno(errno, "Failed to send FIFO fd: %m"); + if (r < 0) + return log_error_errno(r, "Failed to send FIFO fd: %m"); /* And now make the FIFO unavailable as /run/kmsg... */ (void) unlink(from); @@ -2299,8 +2279,6 @@ static int wait_for_container(pid_t pid, ContainerStatus *container) { return r; } -static void nop_handler(int sig) {} - static int on_orderly_shutdown(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { pid_t pid; @@ -2472,7 +2450,11 @@ static int inner_child( } } - r = mount_all(NULL, true, arg_uid_shift, arg_uid_range, arg_selinux_apifs_context); + r = mount_all(NULL, arg_userns, true, arg_uid_shift, arg_private_network, arg_uid_range, arg_selinux_apifs_context); + if (r < 0) + return r; + + r = mount_sysfs(NULL); if (r < 0) return r; @@ -2723,7 +2705,7 @@ static int outer_child( return log_error_errno(r, "Failed to make tree read-only: %m"); } - r = mount_all(directory, false, arg_uid_shift, arg_uid_range, arg_selinux_apifs_context); + r = mount_all(directory, arg_userns, false, arg_private_network, arg_uid_shift, arg_uid_range, arg_selinux_apifs_context); if (r < 0) return r; @@ -2804,6 +2786,8 @@ static int outer_child( } pid_socket = safe_close(pid_socket); + kmsg_socket = safe_close(kmsg_socket); + rtnl_socket = safe_close(rtnl_socket); return 0; } @@ -2928,11 +2912,17 @@ static int load_settings(void) { } if ((arg_settings_mask & SETTING_CAPABILITY) == 0) { + uint64_t plus; - if (!arg_settings_trusted && settings->capability != 0) - log_warning("Ignoring Capability= setting, file %s is not trusted.", p); - else - arg_retain |= settings->capability; + plus = settings->capability; + if (settings_private_network(settings)) + plus |= (1ULL << CAP_NET_ADMIN); + + if (!arg_settings_trusted && plus != 0) { + if (settings->capability != 0) + log_warning("Ignoring Capability= setting, file %s is not trusted.", p); + } else + arg_retain |= plus; arg_retain &= ~settings->drop_capability; } @@ -2988,6 +2978,9 @@ static int load_settings(void) { if (!arg_settings_trusted) log_warning("Ignoring network settings, file %s is not trusted.", p); else { + arg_network_veth = settings_private_network(settings); + arg_private_network = settings_private_network(settings); + strv_free(arg_network_interfaces); arg_network_interfaces = settings->network_interfaces; settings->network_interfaces = NULL; @@ -3003,10 +2996,6 @@ static int load_settings(void) { free(arg_network_bridge); arg_network_bridge = settings->network_bridge; settings->network_bridge = NULL; - - arg_network_veth = settings->network_veth > 0 || settings->network_bridge; - - arg_private_network = true; /* all these settings imply private networking */ } } @@ -3112,7 +3101,7 @@ int main(int argc, char *argv[]) { goto finish; } - r = btrfs_subvol_snapshot(arg_directory, np, (arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE); + r = btrfs_subvol_snapshot(arg_directory, np, (arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE | BTRFS_SNAPSHOT_QUOTA); if (r < 0) { log_error_errno(r, "Failed to create snapshot %s from %s: %m", np, arg_directory); goto finish; @@ -3136,7 +3125,7 @@ int main(int argc, char *argv[]) { } if (arg_template) { - r = btrfs_subvol_snapshot(arg_template, arg_directory, (arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE); + r = btrfs_subvol_snapshot(arg_template, arg_directory, (arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE | BTRFS_SNAPSHOT_QUOTA); if (r == -EEXIST) { if (!arg_quiet) log_info("Directory %s already exists, not populating from template %s.", arg_directory, arg_template); @@ -3159,10 +3148,9 @@ int main(int argc, char *argv[]) { } else { const char *p; - p = strjoina(arg_directory, - argc > optind && path_is_absolute(argv[optind]) ? argv[optind] : "/usr/bin/"); - if (access(p, F_OK) < 0) { - log_error("Directory %s lacks the binary to execute or doesn't look like a binary tree. Refusing.", arg_directory); + p = strjoina(arg_directory, "/usr/"); + if (laccess(p, F_OK) < 0) { + log_error("Directory %s doesn't look like it has an OS tree. Refusing.", arg_directory); r = -EINVAL; goto finish; } @@ -3256,7 +3244,7 @@ int main(int argc, char *argv[]) { ContainerStatus container_status; _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL; static const struct sigaction sa = { - .sa_handler = nop_handler, + .sa_handler = nop_signal_handler, .sa_flags = SA_NOCLDSTOP, }; int ifi = 0; @@ -3353,8 +3341,7 @@ int main(int argc, char *argv[]) { barrier_set_role(&barrier, BARRIER_PARENT); - fdset_free(fds); - fds = NULL; + fds = fdset_free(fds); kmsg_socket_pair[1] = safe_close(kmsg_socket_pair[1]); rtnl_socket_pair[1] = safe_close(rtnl_socket_pair[1]); @@ -3489,8 +3476,8 @@ int main(int argc, char *argv[]) { } /* Let the child know that we are ready and wait that the child is completely ready now. */ - if (!barrier_place_and_sync(&barrier)) { /* #5 */ - log_error("Client died too early."); + if (!barrier_place_and_sync(&barrier)) { /* #4 */ + log_error("Child died too early."); r = -ESRCH; goto finish; } @@ -3529,7 +3516,7 @@ int main(int argc, char *argv[]) { rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]); - r = pty_forward_new(event, master, true, !interactive, &forward); + r = pty_forward_new(event, master, PTY_FORWARD_IGNORE_VHANGUP | (interactive ? 0 : PTY_FORWARD_READ_ONLY), &forward); if (r < 0) { log_error_errno(r, "Failed to create PTY forwarder: %m"); goto finish; @@ -3608,7 +3595,7 @@ finish: if (remove_subvol && arg_directory) { int k; - k = btrfs_subvol_remove(arg_directory, true); + k = btrfs_subvol_remove(arg_directory, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA); if (k < 0) log_warning_errno(k, "Cannot remove subvolume '%s', ignoring: %m", arg_directory); } |