/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include "sd-bus.h" #include "sd-device.h" #include "build.h" #include "bus-error.h" #include "bus-locator.h" #include "bus-unit-util.h" #include "bus-wait-for-jobs.h" #include "chase.h" #include "device-util.h" #include "dirent-util.h" #include "escape.h" #include "fd-util.h" #include "fileio.h" #include "format-table.h" #include "format-util.h" #include "fs-util.h" #include "fstab-util.h" #include "libmount-util.h" #include "main-func.h" #include "mount-util.h" #include "mountpoint-util.h" #include "pager.h" #include "parse-argument.h" #include "parse-util.h" #include "path-util.h" #include "polkit-agent.h" #include "pretty-print.h" #include "process-util.h" #include "sort-util.h" #include "stat-util.h" #include "strv.h" #include "terminal-util.h" #include "udev-util.h" #include "umask-util.h" #include "unit-def.h" #include "unit-name.h" #include "user-util.h" enum { ACTION_DEFAULT, ACTION_MOUNT, ACTION_AUTOMOUNT, ACTION_UMOUNT, ACTION_LIST, } arg_action = ACTION_DEFAULT; static bool arg_no_block = false; static PagerFlags arg_pager_flags = 0; static bool arg_legend = true; static bool arg_full = false; static bool arg_ask_password = true; static bool arg_quiet = false; static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; static RuntimeScope arg_runtime_scope = RUNTIME_SCOPE_SYSTEM; static const char *arg_host = NULL; static bool arg_discover = false; static char *arg_mount_what = NULL; static char *arg_mount_where = NULL; static char *arg_mount_type = NULL; static char *arg_mount_options = NULL; static char *arg_description = NULL; static char **arg_property = NULL; static usec_t arg_timeout_idle = USEC_INFINITY; static bool arg_timeout_idle_set = false; static char **arg_automount_property = NULL; static int arg_bind_device = -1; static uid_t arg_uid = UID_INVALID; static gid_t arg_gid = GID_INVALID; static bool arg_fsck = true; static bool arg_aggressive_gc = false; static bool arg_tmpfs = false; static sd_json_format_flags_t arg_json_format_flags = SD_JSON_FORMAT_OFF; STATIC_DESTRUCTOR_REGISTER(arg_mount_what, freep); STATIC_DESTRUCTOR_REGISTER(arg_mount_where, freep); STATIC_DESTRUCTOR_REGISTER(arg_mount_type, freep); STATIC_DESTRUCTOR_REGISTER(arg_mount_options, freep); STATIC_DESTRUCTOR_REGISTER(arg_description, freep); STATIC_DESTRUCTOR_REGISTER(arg_property, strv_freep); STATIC_DESTRUCTOR_REGISTER(arg_automount_property, strv_freep); static int parse_where(const char *input, char **ret_where) { int r; assert(input); assert(ret_where); if (arg_transport == BUS_TRANSPORT_LOCAL) { r = chase(input, NULL, CHASE_NONEXISTENT, ret_where, NULL); if (r < 0) return log_error_errno(r, "Failed to make path %s absolute: %m", input); } else { if (!path_is_absolute(input)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path must be absolute when operating remotely: %s", input); r = path_simplify_alloc(input, ret_where); if (r < 0) return log_error_errno(r, "Failed to simplify path %s: %m", input); } return 0; } static int help(void) { _cleanup_free_ char *link = NULL; int r; r = terminal_urlify_man("systemd-mount", "1", &link); if (r < 0) return log_oom(); printf("systemd-mount [OPTIONS...] WHAT [WHERE]\n" "systemd-mount [OPTIONS...] --tmpfs [NAME] WHERE\n" "systemd-mount [OPTIONS...] --list\n" "%s [OPTIONS...] %sWHAT|WHERE...\n\n" "%sEstablish a mount or auto-mount point transiently.%s\n\n" " -h --help Show this help\n" " --version Show package version\n" " --no-block Do not wait until operation finished\n" " --no-pager Do not pipe output into a pager\n" " --no-legend Do not show the headers\n" " -l --full Do not ellipsize output\n" " --no-ask-password Do not prompt for password\n" " -q --quiet Suppress information messages during runtime\n" " --json=pretty|short|off Generate JSON output\n" " --user Run as user unit\n" " -H --host=[USER@]HOST Operate on remote host\n" " -M --machine=CONTAINER Operate on local container\n" " --discover Discover mount device metadata\n" " -t --type=TYPE File system type\n" " -o --options=OPTIONS Mount options\n" " --owner=USER Add uid= and gid= options for USER\n" " --fsck=no Don't run file system check before mount\n" " --description=TEXT Description for unit\n" " -p --property=NAME=VALUE Set mount unit property\n" " -A --automount=BOOL Create an auto-mount point\n" " --timeout-idle-sec=SEC Specify automount idle timeout\n" " --automount-property=NAME=VALUE\n" " Set automount unit property\n" " --bind-device Bind automount unit to device\n" " --list List mountable block devices\n" " -u --umount Unmount mount points\n" " -G --collect Unload unit after it stopped, even when failed\n" " -T --tmpfs Create a new tmpfs on the mount point\n" "\nSee the %s for details.\n", program_invocation_short_name, streq(program_invocation_short_name, "systemd-umount") ? "" : "--umount ", ansi_highlight(), ansi_normal(), link); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_BLOCK, ARG_NO_PAGER, ARG_NO_LEGEND, ARG_NO_ASK_PASSWORD, ARG_USER, ARG_SYSTEM, ARG_DISCOVER, ARG_MOUNT_TYPE, ARG_MOUNT_OPTIONS, ARG_OWNER, ARG_FSCK, ARG_DESCRIPTION, ARG_TIMEOUT_IDLE, ARG_AUTOMOUNT, ARG_AUTOMOUNT_PROPERTY, ARG_BIND_DEVICE, ARG_LIST, ARG_JSON, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "no-block", no_argument, NULL, ARG_NO_BLOCK }, { "no-pager", no_argument, NULL, ARG_NO_PAGER }, { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, { "full", no_argument, NULL, 'l' }, { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, { "quiet", no_argument, NULL, 'q' }, { "user", no_argument, NULL, ARG_USER }, { "system", no_argument, NULL, ARG_SYSTEM }, { "host", required_argument, NULL, 'H' }, { "machine", required_argument, NULL, 'M' }, { "discover", no_argument, NULL, ARG_DISCOVER }, { "type", required_argument, NULL, 't' }, { "options", required_argument, NULL, 'o' }, { "owner", required_argument, NULL, ARG_OWNER }, { "fsck", required_argument, NULL, ARG_FSCK }, { "description", required_argument, NULL, ARG_DESCRIPTION }, { "property", required_argument, NULL, 'p' }, { "automount", required_argument, NULL, ARG_AUTOMOUNT }, { "timeout-idle-sec", required_argument, NULL, ARG_TIMEOUT_IDLE }, { "automount-property", required_argument, NULL, ARG_AUTOMOUNT_PROPERTY }, { "bind-device", no_argument, NULL, ARG_BIND_DEVICE }, { "list", no_argument, NULL, ARG_LIST }, { "umount", no_argument, NULL, 'u' }, { "unmount", no_argument, NULL, 'u' }, /* Compat spelling */ { "collect", no_argument, NULL, 'G' }, { "tmpfs", no_argument, NULL, 'T' }, { "json", required_argument, NULL, ARG_JSON }, {}, }; int r, c; assert(argc >= 0); assert(argv); if (invoked_as(argv, "systemd-umount")) arg_action = ACTION_UMOUNT; while ((c = getopt_long(argc, argv, "hqH:M:t:o:p:AuGlT", options, NULL)) >= 0) switch (c) { case 'h': return help(); case ARG_VERSION: return version(); case ARG_NO_BLOCK: arg_no_block = true; break; case ARG_NO_PAGER: arg_pager_flags |= PAGER_DISABLE; break; case ARG_NO_LEGEND: arg_legend = false; break; case 'l': arg_full = true; break; case ARG_NO_ASK_PASSWORD: arg_ask_password = false; break; case 'q': arg_quiet = true; break; case ARG_USER: arg_runtime_scope = RUNTIME_SCOPE_USER; break; case ARG_SYSTEM: arg_runtime_scope = RUNTIME_SCOPE_SYSTEM; break; case 'H': arg_transport = BUS_TRANSPORT_REMOTE; arg_host = optarg; break; case 'M': arg_transport = BUS_TRANSPORT_MACHINE; arg_host = optarg; break; case ARG_DISCOVER: arg_discover = true; break; case 't': r = free_and_strdup_warn(&arg_mount_type, optarg); if (r < 0) return r; break; case 'o': r = free_and_strdup_warn(&arg_mount_options, optarg); if (r < 0) return r; break; case ARG_OWNER: { const char *user = optarg; r = get_user_creds(&user, &arg_uid, &arg_gid, NULL, NULL, 0); if (r < 0) return log_error_errno(r, r == -EBADMSG ? "UID or GID of user %s are invalid." : "Cannot use \"%s\" as owner: %m", optarg); break; } case ARG_FSCK: r = parse_boolean_argument("--fsck=", optarg, &arg_fsck); if (r < 0) return r; break; case ARG_DESCRIPTION: r = free_and_strdup_warn(&arg_description, optarg); if (r < 0) return r; break; case 'p': if (strv_extend(&arg_property, optarg) < 0) return log_oom(); break; case 'A': arg_action = ACTION_AUTOMOUNT; break; case ARG_AUTOMOUNT: r = parse_boolean_argument("--automount=", optarg, NULL); if (r < 0) return r; arg_action = r ? ACTION_AUTOMOUNT : ACTION_MOUNT; break; case ARG_TIMEOUT_IDLE: r = parse_sec(optarg, &arg_timeout_idle); if (r < 0) return log_error_errno(r, "Failed to parse timeout: %s", optarg); break; case ARG_AUTOMOUNT_PROPERTY: if (strv_extend(&arg_automount_property, optarg) < 0) return log_oom(); break; case ARG_BIND_DEVICE: arg_bind_device = true; break; case ARG_LIST: arg_action = ACTION_LIST; break; case 'u': arg_action = ACTION_UMOUNT; break; case 'G': arg_aggressive_gc = true; break; case 'T': arg_tmpfs = true; break; case ARG_JSON: r = parse_json_argument(optarg, &arg_json_format_flags); if (r <= 0) return r; break; case '?': return -EINVAL; default: assert_not_reached(); } if (arg_runtime_scope == RUNTIME_SCOPE_USER) { arg_ask_password = false; if (arg_transport != BUS_TRANSPORT_LOCAL) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Execution in user context is not supported on non-local systems."); } if (arg_action == ACTION_LIST) { if (optind < argc) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Too many arguments."); if (arg_transport != BUS_TRANSPORT_LOCAL) return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Listing devices only supported locally."); } else if (arg_action == ACTION_UMOUNT) { if (optind >= argc) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "At least one argument required."); if (arg_transport != BUS_TRANSPORT_LOCAL) for (int i = optind; i < argc; i++) if (!path_is_absolute(argv[i])) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path must be absolute when operating remotely: %s", argv[i]); } else { if (optind >= argc) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "At least one argument required."); if (argc > optind+2) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "More than two arguments are not allowed."); if (arg_tmpfs) { if (argc <= optind+1) { arg_mount_what = strdup("tmpfs"); if (!arg_mount_what) return log_oom(); r = parse_where(argv[optind], &arg_mount_where); if (r < 0) return r; } else { arg_mount_what = strdup(argv[optind]); if (!arg_mount_what) return log_oom(); } if (!strv_contains(arg_property, "Type=tmpfs") && strv_extend(&arg_property, "Type=tmpfs") < 0) return log_oom(); } else { if (arg_mount_type && !fstype_is_blockdev_backed(arg_mount_type)) { arg_mount_what = strdup(argv[optind]); if (!arg_mount_what) return log_oom(); } else if (arg_transport == BUS_TRANSPORT_LOCAL) { _cleanup_free_ char *u = NULL; u = fstab_node_to_udev_node(argv[optind]); if (!u) return log_oom(); r = chase(u, NULL, 0, &arg_mount_what, NULL); if (r < 0) return log_error_errno(r, "Failed to make path %s absolute: %m", u); } else { if (!path_is_absolute(argv[optind])) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path must be absolute when operating remotely: %s", argv[optind]); r = path_simplify_alloc(argv[optind], &arg_mount_what); if (r < 0) return log_error_errno(r, "Failed to simplify path: %m"); } } if (argc > optind+1) { r = parse_where(argv[optind+1], &arg_mount_where); if (r < 0) return r; } else if (!arg_tmpfs) arg_discover = true; if (arg_discover && arg_transport != BUS_TRANSPORT_LOCAL) return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Automatic mount location discovery is only supported locally."); } return 1; } static int transient_unit_set_properties(sd_bus_message *m, UnitType t, char **properties) { int r; if (!isempty(arg_description)) { r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description); if (r < 0) return r; } if (arg_bind_device && is_device_path(arg_mount_what)) { _cleanup_free_ char *device_unit = NULL; r = unit_name_from_path(arg_mount_what, ".device", &device_unit); if (r < 0) return r; r = sd_bus_message_append(m, "(sv)(sv)", "After", "as", 1, device_unit, "BindsTo", "as", 1, device_unit); if (r < 0) return r; } if (arg_aggressive_gc) { r = sd_bus_message_append(m, "(sv)", "CollectMode", "s", "inactive-or-failed"); if (r < 0) return r; } r = bus_append_unit_property_assignment_many(m, t, properties); if (r < 0) return r; return 0; } static int transient_mount_set_properties(sd_bus_message *m) { int r; assert(m); r = transient_unit_set_properties(m, UNIT_MOUNT, arg_property); if (r < 0) return r; if (arg_mount_what) { r = sd_bus_message_append(m, "(sv)", "What", "s", arg_mount_what); if (r < 0) return r; } if (arg_mount_type) { r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_mount_type); if (r < 0) return r; } _cleanup_free_ char *options = NULL; /* Prepend uid=…,gid=… if arg_uid is set */ if (arg_uid != UID_INVALID) { r = strextendf_with_separator(&options, ",", "uid="UID_FMT",gid="GID_FMT, arg_uid, arg_gid); if (r < 0) return r; } /* Override the default for tmpfs mounts. The kernel sets the sticky bit on the root directory by * default. This makes sense for the case when the user does 'mount -t tmpfs tmpfs /tmp', but less so * for other directories. * * Let's also set some reasonable limits. We use the current umask, to match what a command to create * directory would use, e.g. mkdir. */ if (arg_tmpfs) { mode_t mask; r = get_process_umask(0, &mask); if (r < 0) return r; assert((mask & ~0777) == 0); r = strextendf_with_separator(&options, ",", "mode=0%o,nodev,nosuid%s", 0777 & ~mask, NESTED_TMPFS_LIMITS); if (r < 0) return r; } if (arg_mount_options) if (!strextend_with_separator(&options, ",", arg_mount_options)) return -ENOMEM; if (options) { log_debug("Using mount options: %s", options); r = sd_bus_message_append(m, "(sv)", "Options", "s", options); if (r < 0) return r; } else log_debug("Not using any mount options"); if (arg_fsck) { _cleanup_free_ char *fsck = NULL; r = unit_name_from_path_instance("systemd-fsck", arg_mount_what, ".service", &fsck); if (r < 0) return r; r = sd_bus_message_append(m, "(sv)(sv)", "Requires", "as", 1, fsck, "After", "as", 1, fsck); if (r < 0) return r; } return 0; } static int transient_automount_set_properties(sd_bus_message *m) { int r; assert(m); r = transient_unit_set_properties(m, UNIT_AUTOMOUNT, arg_automount_property); if (r < 0) return r; if (arg_timeout_idle != USEC_INFINITY) { r = sd_bus_message_append(m, "(sv)", "TimeoutIdleUSec", "t", arg_timeout_idle); if (r < 0) return r; } return 0; } static int start_transient_mount( sd_bus *bus, char **argv) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; _cleanup_free_ char *mount_unit = NULL; int r; if (!arg_no_block) { r = bus_wait_for_jobs_new(bus, &w); if (r < 0) return log_error_errno(r, "Could not watch jobs: %m"); } r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit); if (r < 0) return log_error_errno(r, "Failed to make mount unit name: %m"); r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); if (r < 0) return bus_log_create_error(r); /* Name and mode */ r = sd_bus_message_append(m, "ss", mount_unit, "fail"); if (r < 0) return bus_log_create_error(r); /* Properties */ r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_mount_set_properties(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); /* Auxiliary units */ r = sd_bus_message_append(m, "a(sa(sv))", 0); if (r < 0) return bus_log_create_error(r); polkit_agent_open_if_enabled(arg_transport, arg_ask_password); r = sd_bus_call(bus, m, 0, &error, &reply); if (r < 0) return log_error_errno(r, "Failed to start transient mount unit: %s", bus_error_message(&error, r)); if (w) { const char *object; r = sd_bus_message_read(reply, "o", &object); if (r < 0) return bus_log_parse_error(r); r = bus_wait_for_jobs_one(w, object, arg_quiet ? 0 : BUS_WAIT_JOBS_LOG_ERROR, NULL); if (r < 0) return r; } if (!arg_quiet) log_info("Started unit %s%s%s for mount point: %s%s%s", ansi_highlight(), mount_unit, ansi_normal(), ansi_highlight(), arg_mount_where, ansi_normal()); return 0; } static int start_transient_automount( sd_bus *bus, char **argv) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; _cleanup_free_ char *automount_unit = NULL, *mount_unit = NULL; int r; if (!arg_no_block) { r = bus_wait_for_jobs_new(bus, &w); if (r < 0) return log_error_errno(r, "Could not watch jobs: %m"); } r = unit_name_from_path(arg_mount_where, ".automount", &automount_unit); if (r < 0) return log_error_errno(r, "Failed to make automount unit name: %m"); r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit); if (r < 0) return log_error_errno(r, "Failed to make mount unit name: %m"); r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); if (r < 0) return bus_log_create_error(r); /* Name and mode */ r = sd_bus_message_append(m, "ss", automount_unit, "fail"); if (r < 0) return bus_log_create_error(r); /* Properties */ r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_automount_set_properties(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); /* Auxiliary units */ r = sd_bus_message_open_container(m, 'a', "(sa(sv))"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_open_container(m, 'r', "sa(sv)"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_append(m, "s", mount_unit); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_mount_set_properties(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); polkit_agent_open_if_enabled(arg_transport, arg_ask_password); r = sd_bus_call(bus, m, 0, &error, &reply); if (r < 0) return log_error_errno(r, "Failed to start transient automount unit: %s", bus_error_message(&error, r)); if (w) { const char *object; r = sd_bus_message_read(reply, "o", &object); if (r < 0) return bus_log_parse_error(r); r = bus_wait_for_jobs_one(w, object, arg_quiet ? 0 : BUS_WAIT_JOBS_LOG_ERROR, NULL); if (r < 0) return r; } if (!arg_quiet) log_info("Started unit %s%s%s for mount point: %s%s%s", ansi_highlight(), automount_unit, ansi_normal(), ansi_highlight(), arg_mount_where, ansi_normal()); return 0; } static int find_mount_points(const char *what, char ***list) { _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL; _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL; _cleanup_strv_free_ char **l = NULL; size_t n = 0; int r; assert(what); assert(list); /* Returns all mount points obtained from /proc/self/mountinfo in *list, * and the number of mount points as return value. */ r = libmount_parse(NULL, NULL, &table, &iter); if (r < 0) return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m"); for (;;) { struct libmnt_fs *fs; const char *source, *target; r = mnt_table_next_fs(table, iter, &fs); if (r == 1) break; if (r < 0) return log_error_errno(r, "Failed to get next entry from /proc/self/mountinfo: %m"); source = mnt_fs_get_source(fs); target = mnt_fs_get_target(fs); if (!source || !target) continue; if (!path_equal(source, what)) continue; /* one extra slot is needed for the terminating NULL */ if (!GREEDY_REALLOC0(l, n + 2)) return log_oom(); l[n] = strdup(target); if (!l[n]) return log_oom(); n++; } if (!GREEDY_REALLOC0(l, n + 1)) return log_oom(); *list = TAKE_PTR(l); return n; } static int find_loop_device(const char *backing_file, sd_device **ret) { _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; int r; assert(backing_file); assert(ret); r = sd_device_enumerator_new(&e); if (r < 0) return log_oom(); r = sd_device_enumerator_add_match_subsystem(e, "block", /* match = */ true); if (r < 0) return log_error_errno(r, "Failed to add subsystem match: %m"); r = sd_device_enumerator_add_match_property(e, "ID_FS_USAGE", "filesystem"); if (r < 0) return log_error_errno(r, "Failed to add property match: %m"); r = sd_device_enumerator_add_match_sysname(e, "loop*"); if (r < 0) return log_error_errno(r, "Failed to add sysname match: %m"); r = sd_device_enumerator_add_match_sysattr(e, "loop/backing_file", /* value = */ NULL, /* match = */ true); if (r < 0) return log_error_errno(r, "Failed to add sysattr match: %m"); FOREACH_DEVICE(e, dev) { const char *s; r = sd_device_get_sysattr_value(dev, "loop/backing_file", &s); if (r < 0) { log_device_debug_errno(dev, r, "Failed to read \"loop/backing_file\" sysattr, ignoring: %m"); continue; } if (inode_same(s, backing_file, 0) <= 0) continue; *ret = sd_device_ref(dev); return 0; } return -ENXIO; } static int stop_mount( sd_bus *bus, const char *where, const char *suffix) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; _cleanup_free_ char *mount_unit = NULL; int r; if (!arg_no_block) { r = bus_wait_for_jobs_new(bus, &w); if (r < 0) return log_error_errno(r, "Could not watch jobs: %m"); } r = unit_name_from_path(where, suffix, &mount_unit); if (r < 0) return log_error_errno(r, "Failed to make %s unit name from path %s: %m", suffix + 1, where); r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StopUnit"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); if (r < 0) return bus_log_create_error(r); /* Name and mode */ r = sd_bus_message_append(m, "ss", mount_unit, "fail"); if (r < 0) return bus_log_create_error(r); polkit_agent_open_if_enabled(arg_transport, arg_ask_password); r = sd_bus_call(bus, m, 0, &error, &reply); if (r < 0) { if (streq(suffix, ".automount") && sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit")) return 0; return log_error_errno(r, "Failed to stop %s unit: %s", suffix + 1, bus_error_message(&error, r)); } if (w) { const char *object; r = sd_bus_message_read(reply, "o", &object); if (r < 0) return bus_log_parse_error(r); r = bus_wait_for_jobs_one(w, object, arg_quiet ? 0 : BUS_WAIT_JOBS_LOG_ERROR, NULL); if (r < 0) return r; } if (!arg_quiet) log_info("Stopped unit %s%s%s for mount point: %s%s%s", ansi_highlight(), mount_unit, ansi_normal(), ansi_highlight(), where, ansi_normal()); return 0; } static int stop_mounts( sd_bus *bus, const char *where) { int r; if (path_equal(where, "/")) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Refusing to operate on root directory: %s", where); if (!path_is_normalized(where)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path contains non-normalized components: %s", where); r = stop_mount(bus, where, ".mount"); if (r < 0) return r; r = stop_mount(bus, where, ".automount"); if (r < 0) return r; return 0; } static int umount_by_device(sd_bus *bus, sd_device *dev) { _cleanup_strv_free_ char **list = NULL; const char *v; int r, ret = 0; assert(bus); assert(dev); if (sd_device_get_property_value(dev, "SYSTEMD_MOUNT_WHERE", &v) >= 0) ret = stop_mounts(bus, v); r = sd_device_get_devname(dev, &v); if (r < 0) return r; r = find_mount_points(v, &list); if (r < 0) return r; STRV_FOREACH(l, list) { r = stop_mounts(bus, *l); if (r < 0) ret = r; } return ret; } static int umount_by_device_node(sd_bus *bus, const char *node) { _cleanup_(sd_device_unrefp) sd_device *dev = NULL; const char *v; int r; assert(bus); assert(node); r = sd_device_new_from_devname(&dev, node); if (r < 0) return log_error_errno(r, "Failed to get device from %s: %m", node); r = sd_device_get_property_value(dev, "ID_FS_USAGE", &v); if (r < 0) return log_device_error_errno(dev, r, "Failed to get \"ID_FS_USAGE\" device property: %m"); if (!streq(v, "filesystem")) return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "%s does not contain a known file system.", node); return umount_by_device(bus, dev); } static int umount_loop(sd_bus *bus, const char *backing_file) { _cleanup_(sd_device_unrefp) sd_device *dev = NULL; int r; assert(backing_file); r = find_loop_device(backing_file, &dev); if (r < 0) return log_error_errno(r, r == -ENXIO ? "File %s is not mounted." : "Can't get loop device for %s: %m", backing_file); return umount_by_device(bus, dev); } static int action_umount( sd_bus *bus, int argc, char **argv) { int r, r2 = 0; if (arg_transport != BUS_TRANSPORT_LOCAL) { for (int i = optind; i < argc; i++) { _cleanup_free_ char *p = NULL; r = path_simplify_alloc(argv[i], &p); if (r < 0) return r; r = stop_mounts(bus, p); if (r < 0) r2 = r; } return r2; } for (int i = optind; i < argc; i++) { _cleanup_free_ char *u = NULL, *p = NULL; struct stat st; u = fstab_node_to_udev_node(argv[i]); if (!u) return log_oom(); r = chase(u, NULL, 0, &p, NULL); if (r < 0) { r2 = log_error_errno(r, "Failed to make path %s absolute: %m", argv[i]); continue; } if (stat(p, &st) < 0) return log_error_errno(errno, "Can't stat %s (from %s): %m", p, argv[i]); if (S_ISBLK(st.st_mode)) r = umount_by_device_node(bus, p); else if (S_ISREG(st.st_mode)) r = umount_loop(bus, p); else if (S_ISDIR(st.st_mode)) r = stop_mounts(bus, p); else { log_error("Invalid file type: %s (from %s)", p, argv[i]); r = -EINVAL; } if (r < 0) r2 = r; } return r2; } static int acquire_mount_type(sd_device *d) { const char *v; assert(d); if (arg_mount_type) return 0; if (sd_device_get_property_value(d, "ID_FS_TYPE", &v) < 0) return 0; arg_mount_type = strdup(v); if (!arg_mount_type) return log_oom(); log_debug("Discovered type=%s", arg_mount_type); return 1; } static int acquire_mount_options(sd_device *d) { const char *v; assert(d); if (arg_mount_options) return 0; if (sd_device_get_property_value(d, "SYSTEMD_MOUNT_OPTIONS", &v) < 0) return 0; arg_mount_options = strdup(v); if (!arg_mount_options) return log_oom(); log_debug("Discovered options=%s", arg_mount_options); return 1; } static const char* get_label(sd_device *d) { const char *label; assert(d); if (sd_device_get_property_value(d, "ID_FS_LABEL", &label) >= 0) return label; if (sd_device_get_property_value(d, "ID_PART_ENTRY_NAME", &label) >= 0) return label; return NULL; } static int acquire_mount_where(sd_device *d) { const char *v; int r; if (arg_mount_where) return 0; if (sd_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE", &v) < 0) { _cleanup_free_ char *escaped = NULL, *devname_bn = NULL; const char *name; name = get_label(d); if (!name) (void) device_get_model_string(d, &name); if (!name) { const char *dn; if (sd_device_get_devname(d, &dn) < 0) return 0; r = path_extract_filename(dn, &devname_bn); if (r < 0) return log_error_errno(r, "Failed to extract file name from '%s': %m", dn); name = devname_bn; } escaped = xescape(name, "\\"); if (!escaped) return log_oom(); if (!filename_is_valid(escaped)) return 0; arg_mount_where = path_join("/run/media/system", escaped); } else arg_mount_where = strdup(v); if (!arg_mount_where) return log_oom(); log_debug("Discovered where=%s", arg_mount_where); return 1; } static int acquire_mount_where_for_loop_dev(sd_device *dev) { _cleanup_strv_free_ char **list = NULL; const char *node; int r; assert(dev); if (arg_mount_where) return 0; r = sd_device_get_devname(dev, &node); if (r < 0) return r; r = find_mount_points(node, &list); if (r < 0) return r; if (r == 0) return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "Can't find mount point of %s. It is expected that %s is already mounted on a place.", node, node); if (r >= 2) return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "%s is mounted on %d places. It is expected that %s is mounted on a place.", node, r, node); arg_mount_where = strdup(list[0]); if (!arg_mount_where) return log_oom(); log_debug("Discovered where=%s", arg_mount_where); return 1; } static int acquire_description(sd_device *d) { const char *model = NULL, *label; if (arg_description) return 0; (void) device_get_model_string(d, &model); label = get_label(d); if (!label) (void) sd_device_get_property_value(d, "ID_PART_ENTRY_NUMBER", &label); if (model && label) arg_description = strjoin(model, " ", label); else if (label) arg_description = strdup(label); else if (model) arg_description = strdup(model); else return 0; if (!arg_description) return log_oom(); log_debug("Discovered description=%s", arg_description); return 1; } static int acquire_removable(sd_device *d) { const char *v; /* Shortcut this if there's no reason to check it */ if (arg_action != ACTION_DEFAULT && arg_timeout_idle_set && arg_bind_device >= 0) return 0; for (;;) { if (sd_device_get_sysattr_value(d, "removable", &v) >= 0) break; if (sd_device_get_parent(d, &d) < 0) return 0; if (!device_in_subsystem(d, "block")) return 0; } if (parse_boolean(v) <= 0) return 0; log_debug("Discovered removable device."); if (arg_action == ACTION_DEFAULT) { log_debug("Automatically turning on automount."); arg_action = ACTION_AUTOMOUNT; } if (!arg_timeout_idle_set) { log_debug("Setting idle timeout to 1s."); arg_timeout_idle = USEC_PER_SEC; } if (arg_bind_device < 0) { log_debug("Binding automount unit to device."); arg_bind_device = true; } return 1; } static int discover_loop_backing_file(void) { _cleanup_(sd_device_unrefp) sd_device *d = NULL; int r; r = find_loop_device(arg_mount_what, &d); if (r < 0 && r != -ENXIO) return log_error_errno(errno, "Can't get loop device for %s: %m", arg_mount_what); if (r == -ENXIO) { _cleanup_free_ char *escaped = NULL, *bn = NULL; if (arg_mount_where) return 0; r = path_extract_filename(arg_mount_what, &bn); if (r < 0) return log_error_errno(r, "Failed to extract file name from backing file path '%s': %m", arg_mount_what); escaped = xescape(bn, "\\"); if (!escaped) return log_oom(); if (!filename_is_valid(escaped)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Escaped name %s is not a valid filename.", escaped); arg_mount_where = path_join("/run/media/system", escaped); if (!arg_mount_where) return log_oom(); log_debug("Discovered where=%s", arg_mount_where); return 0; } r = acquire_mount_type(d); if (r < 0) return r; r = acquire_mount_options(d); if (r < 0) return r; r = acquire_mount_where_for_loop_dev(d); if (r < 0) return r; r = acquire_description(d); if (r < 0) return r; return 0; } static int discover_device(void) { _cleanup_(sd_device_unrefp) sd_device *d = NULL; struct stat st; const char *v; int r; if (stat(arg_mount_what, &st) < 0) return log_error_errno(errno, "Can't stat %s: %m", arg_mount_what); if (S_ISREG(st.st_mode)) return discover_loop_backing_file(); if (!S_ISBLK(st.st_mode)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid file type: %s", arg_mount_what); r = sd_device_new_from_stat_rdev(&d, &st); if (r < 0) return log_error_errno(r, "Failed to get device from device number: %m"); if (sd_device_get_property_value(d, "ID_FS_USAGE", &v) < 0 || !streq(v, "filesystem")) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "%s does not contain a known file system.", arg_mount_what); r = acquire_mount_type(d); if (r < 0) return r; r = acquire_mount_options(d); if (r < 0) return r; r = acquire_mount_where(d); if (r < 0) return r; r = acquire_description(d); if (r < 0) return r; r = acquire_removable(d); if (r < 0) return r; return 0; } static int list_devices(void) { enum { COLUMN_NODE, COLUMN_DISKSEQ, COLUMN_PATH, COLUMN_MODEL, COLUMN_WWN, COLUMN_FSTYPE, COLUMN_LABEL, COLUMN_UUID, _COLUMN_MAX, }; _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; _cleanup_(table_unrefp) Table *table = NULL; int r; r = sd_device_enumerator_new(&e); if (r < 0) return log_oom(); r = sd_device_enumerator_add_match_subsystem(e, "block", true); if (r < 0) return log_error_errno(r, "Failed to add block match: %m"); r = sd_device_enumerator_add_match_property(e, "ID_FS_USAGE", "filesystem"); if (r < 0) return log_error_errno(r, "Failed to add property match: %m"); table = table_new("node", "diskseq", "path", "model", "wwn", "fstype", "label", "uuid"); if (!table) return log_oom(); if (arg_full) table_set_width(table, 0); r = table_set_sort(table, (size_t) 0); if (r < 0) return log_error_errno(r, "Failed to set sort index: %m"); table_set_ersatz_string(table, TABLE_ERSATZ_DASH); FOREACH_DEVICE(e, d) { for (unsigned c = 0; c < _COLUMN_MAX; c++) { const char *x = NULL; switch (c) { case COLUMN_NODE: (void) sd_device_get_devname(d, &x); break; case COLUMN_DISKSEQ: { uint64_t ds; r = sd_device_get_diskseq(d, &ds); if (r < 0) { log_debug_errno(r, "Failed to get diskseq of block device, ignoring: %m"); r = table_add_cell(table, NULL, TABLE_EMPTY, NULL); } else r = table_add_cell(table, NULL, TABLE_UINT64, &ds); if (r < 0) return table_log_add_error(r); continue; } case COLUMN_PATH: (void) sd_device_get_property_value(d, "ID_PATH", &x); break; case COLUMN_MODEL: (void) device_get_model_string(d, &x); break; case COLUMN_WWN: (void) sd_device_get_property_value(d, "ID_WWN", &x); break; case COLUMN_FSTYPE: (void) sd_device_get_property_value(d, "ID_FS_TYPE", &x); break; case COLUMN_LABEL: x = get_label(d); break; case COLUMN_UUID: (void) sd_device_get_property_value(d, "ID_FS_UUID", &x); break; } r = table_add_cell(table, NULL, c == COLUMN_NODE ? TABLE_PATH : TABLE_STRING, x); if (r < 0) return table_log_add_error(r); } } return table_print_with_pager(table, arg_json_format_flags, arg_pager_flags, arg_legend); } static int run(int argc, char* argv[]) { _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; int r; log_setup(); r = parse_argv(argc, argv); if (r <= 0) return r; if (arg_action == ACTION_LIST) return list_devices(); r = bus_connect_transport_systemd(arg_transport, arg_host, arg_runtime_scope, &bus); if (r < 0) return bus_log_connect_error(r, arg_transport); if (arg_action == ACTION_UMOUNT) return action_umount(bus, argc, argv); if ((!arg_mount_type || fstype_is_blockdev_backed(arg_mount_type)) && !path_is_normalized(arg_mount_what)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path contains non-normalized components: %s", arg_mount_what); if (arg_discover) { r = discover_device(); if (r < 0) return r; } if (!arg_mount_where) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Can't figure out where to mount %s.", arg_mount_what); if (path_equal(arg_mount_where, "/")) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Refusing to operate on root directory."); if (!path_is_normalized(arg_mount_where)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path contains non-normalized components: %s", arg_mount_where); if (streq_ptr(arg_mount_type, "auto")) arg_mount_type = mfree(arg_mount_type); if (streq_ptr(arg_mount_options, "defaults")) arg_mount_options = mfree(arg_mount_options); if (!is_device_path(arg_mount_what)) arg_fsck = false; if (arg_fsck && arg_mount_type && arg_transport == BUS_TRANSPORT_LOCAL) { r = fsck_exists_for_fstype(arg_mount_type); if (r < 0) log_warning_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", arg_mount_type); else if (r == 0) { log_debug("Disabling file system check as fsck for %s doesn't exist.", arg_mount_type); arg_fsck = false; /* fsck doesn't exist, let's not attempt it */ } } /* The kernel (properly) refuses mounting file systems with unknown uid=,gid= options, * but not for all filesystem types. Let's try to catch the cases where the option * would be used if the file system does not support it. It is also possible to * autodetect the file system, but that's only possible with disk-based file systems * which incidentally seem to be implemented more carefully and reject unknown options, * so it's probably OK that we do the check only when the type is specified. */ if (arg_mount_type && !streq(arg_mount_type, "auto") && arg_uid != UID_INVALID && !fstype_can_uid_gid(arg_mount_type)) return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "File system type %s is not known to support uid=/gid=, refusing.", arg_mount_type); switch (arg_action) { case ACTION_MOUNT: case ACTION_DEFAULT: r = start_transient_mount(bus, argv + optind); break; case ACTION_AUTOMOUNT: r = start_transient_automount(bus, argv + optind); break; default: assert_not_reached(); } return r; } DEFINE_MAIN_FUNCTION(run);