From 6b1dc2bd3cdb3bd932b0692be636ddd2879edb92 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 22 May 2012 19:23:33 +0200 Subject: [PATCH] mount: replace PID1 internal fstab parser with generator Bit by bit we should remove non-unit parsing from PID 1 and move into generators, to clean up our code base a bit and clearly separate parsers. --- .gitignore | 1 + Makefile.am | 12 +- TODO | 6 +- src/core/automount.c | 12 +- src/core/dbus-mount.c | 6 - src/core/dbus-swap.c | 2 - src/core/mount.c | 312 +++++----------- src/core/mount.h | 2 - src/core/swap.c | 104 ++---- src/core/swap.h | 4 - src/cryptsetup/cryptsetup-generator.c | 1 + src/fstab-generator/Makefile | 1 + src/fstab-generator/fstab-generator.c | 517 ++++++++++++++++++++++++++ 13 files changed, 657 insertions(+), 323 deletions(-) create mode 120000 src/fstab-generator/Makefile create mode 100644 src/fstab-generator/fstab-generator.c diff --git a/.gitignore b/.gitignore index 01fba835..e8d2feae 100644 --- a/.gitignore +++ b/.gitignore @@ -1,3 +1,4 @@ +/systemd-fstab-generator /systemd-delta /systemd-sleep /systemd-inhibit diff --git a/Makefile.am b/Makefile.am index 4c1b295c..08f8bfc5 100644 --- a/Makefile.am +++ b/Makefile.am @@ -237,7 +237,8 @@ rootlibexec_PROGRAMS = \ systemd-sleep systemgenerator_PROGRAMS = \ - systemd-getty-generator + systemd-getty-generator \ + systemd-fstab-generator dist_bashcompletion_DATA = \ bash-completion/systemd-bash-completion.sh @@ -1133,6 +1134,15 @@ systemd_getty_generator_LDADD = \ libsystemd-label.la \ libsystemd-shared.la +# ------------------------------------------------------------------------------ +systemd_fstab_generator_SOURCES = \ + src/fstab-generator/fstab-generator.c \ + src/core/mount-setup.c + +systemd_fstab_generator_LDADD = \ + libsystemd-label.la \ + libsystemd-shared.la + # ------------------------------------------------------------------------------ systemd_rc_local_generator_SOURCES = \ src/rc-local-generator/rc-local-generator.c diff --git a/TODO b/TODO index da8bef65..a967efa3 100644 --- a/TODO +++ b/TODO @@ -23,6 +23,8 @@ Bugfixes: Features: +* replace sysvpath by a new more generic property + * make sure show-logs checks for utf8 validity, not ascii validity * add CapbilityBoundingSet to system.conf to set system-wide caps bounds, and same for TimerSlackNS @@ -31,8 +33,6 @@ Features: * readahead: when bumping /sys readahead variable save mtime and compare later to detect changes -* in rescue mode don't pull in sockets - * Document boot options such as forcefsck * (attempt to) make Debianites happy: @@ -51,8 +51,6 @@ Features: * move passno parsing to fstab generator -* actually queue the new default unit after switch-root - * improve !/proc/*/loginuid situation: make /proc/*/loginuid less dependent on CONFIG_AUDIT, or use the users cgroup information when /proc/*/loginuid is not available. diff --git a/src/core/automount.c b/src/core/automount.c index f190417f..e13259b3 100644 --- a/src/core/automount.c +++ b/src/core/automount.c @@ -156,14 +156,12 @@ static int automount_add_default_dependencies(Automount *a) { assert(a); - if (UNIT(a)->manager->running_as == MANAGER_SYSTEM) { - - if ((r = unit_add_dependency_by_name(UNIT(a), UNIT_BEFORE, SPECIAL_BASIC_TARGET, NULL, true)) < 0) - return r; + if (UNIT(a)->manager->running_as != MANAGER_SYSTEM) + return 0; - if ((r = unit_add_two_dependencies_by_name(UNIT(a), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) - return r; - } + r = unit_add_two_dependencies_by_name(UNIT(a), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); + if (r < 0) + return r; return 0; } diff --git a/src/core/dbus-mount.c b/src/core/dbus-mount.c index f6db4682..26b04abe 100644 --- a/src/core/dbus-mount.c +++ b/src/core/dbus-mount.c @@ -80,8 +80,6 @@ static int bus_mount_append_what(DBusMessageIter *i, const char *property, void d = m->parameters_proc_self_mountinfo.what; else if (m->from_fragment && m->parameters_fragment.what) d = m->parameters_fragment.what; - else if (m->from_etc_fstab && m->parameters_etc_fstab.what) - d = m->parameters_etc_fstab.what; else d = ""; @@ -103,8 +101,6 @@ static int bus_mount_append_options(DBusMessageIter *i, const char *property, vo d = m->parameters_proc_self_mountinfo.options; else if (m->from_fragment && m->parameters_fragment.options) d = m->parameters_fragment.options; - else if (m->from_etc_fstab && m->parameters_etc_fstab.options) - d = m->parameters_etc_fstab.options; else d = ""; @@ -126,8 +122,6 @@ static int bus_mount_append_type(DBusMessageIter *i, const char *property, void d = m->parameters_proc_self_mountinfo.fstype; else if (m->from_fragment && m->parameters_fragment.fstype) d = m->parameters_fragment.fstype; - else if (m->from_etc_fstab && m->parameters_etc_fstab.fstype) - d = m->parameters_etc_fstab.fstype; else d = ""; diff --git a/src/core/dbus-swap.c b/src/core/dbus-swap.c index f327ca8b..3ede0e60 100644 --- a/src/core/dbus-swap.c +++ b/src/core/dbus-swap.c @@ -75,8 +75,6 @@ static int bus_swap_append_priority(DBusMessageIter *i, const char *property, vo j = s->parameters_proc_swaps.priority; else if (s->from_fragment) j = s->parameters_fragment.priority; - else if (s->from_etc_fstab) - j = s->parameters_etc_fstab.priority; else j = -1; diff --git a/src/core/mount.c b/src/core/mount.c index b597e9bf..e8f88564 100644 --- a/src/core/mount.c +++ b/src/core/mount.c @@ -68,9 +68,13 @@ static void mount_init(Unit *u) { exec_context_init(&m->exec_context); - /* The stdio/kmsg bridge socket is on /, in order to avoid a - * dep loop, don't use kmsg logging for -.mount */ - if (!unit_has_name(u, "-.mount")) { + if (unit_has_name(u, "-.mount")) { + /* Don't allow start/stop for root directory */ + UNIT(m)->refuse_manual_start = true; + UNIT(m)->refuse_manual_stop = true; + } else { + /* The stdio/kmsg bridge socket is on /, in order to avoid a + * dep loop, don't use kmsg logging for -.mount */ m->exec_context.std_output = u->manager->default_std_output; m->exec_context.std_error = u->manager->default_std_error; } @@ -116,7 +120,6 @@ static void mount_done(Unit *u) { free(m->where); m->where = NULL; - mount_parameters_done(&m->parameters_etc_fstab); mount_parameters_done(&m->parameters_proc_self_mountinfo); mount_parameters_done(&m->parameters_fragment); @@ -129,13 +132,11 @@ static void mount_done(Unit *u) { unit_unwatch_timer(u, &m->timer_watch); } -static MountParameters* get_mount_parameters_configured(Mount *m) { +static MountParameters* get_mount_parameters_fragment(Mount *m) { assert(m); if (m->from_fragment) return &m->parameters_fragment; - else if (m->from_etc_fstab) - return &m->parameters_etc_fstab; return NULL; } @@ -146,7 +147,7 @@ static MountParameters* get_mount_parameters(Mount *m) { if (m->from_proc_self_mountinfo) return &m->parameters_proc_self_mountinfo; - return get_mount_parameters_configured(m); + return get_mount_parameters_fragment(m); } static int mount_add_mount_links(Mount *m) { @@ -156,7 +157,7 @@ static int mount_add_mount_links(Mount *m) { assert(m); - pm = get_mount_parameters_configured(m); + pm = get_mount_parameters_fragment(m); /* Adds in links to other mount points that might lie below or * above us in the hierarchy */ @@ -171,7 +172,7 @@ static int mount_add_mount_links(Mount *m) { if (UNIT(n)->load_state != UNIT_LOADED) continue; - pn = get_mount_parameters_configured(n); + pn = get_mount_parameters_fragment(n); if (path_startswith(m->where, n->where)) { @@ -336,160 +337,113 @@ static bool needs_quota(MountParameters *p) { mount_test_option(p->options, "grpjquota"); } -static int mount_add_fstab_links(Mount *m) { - const char *target, *after, *tu_wants = NULL; - MountParameters *p; - Unit *tu; - int r; - bool noauto, nofail, automount; - - assert(m); - - if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) - return 0; - - if (!(p = get_mount_parameters_configured(m))) - return 0; - - if (p != &m->parameters_etc_fstab) - return 0; - - noauto = !!mount_test_option(p->options, "noauto"); - nofail = !!mount_test_option(p->options, "nofail"); - automount = - mount_test_option(p->options, "comment=systemd.automount") || - mount_test_option(p->options, "x-systemd.automount"); - - if (mount_is_network(p)) { - target = SPECIAL_REMOTE_FS_TARGET; - after = tu_wants = SPECIAL_REMOTE_FS_PRE_TARGET; - } else { - target = SPECIAL_LOCAL_FS_TARGET; - after = SPECIAL_LOCAL_FS_PRE_TARGET; - } - - r = manager_load_unit(UNIT(m)->manager, target, NULL, NULL, &tu); - if (r < 0) - return r; - - if (tu_wants) { - r = unit_add_dependency_by_name(tu, UNIT_WANTS, tu_wants, NULL, true); - if (r < 0) - return r; - } - - if (after) { - r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true); - if (r < 0) - return r; - } - - if (automount) { - Unit *am; - - if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0) - return r; - - /* If auto is configured as well also pull in the - * mount right-away, but don't rely on it. */ - if (!noauto) /* automount + auto */ - if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0) - return r; - - /* Install automount unit */ - if (!nofail) /* automount + fail */ - return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, am, true); - else /* automount + nofail */ - return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, am, true); - - } else if (!noauto) { - - /* Automatically add mount points that aren't natively - * configured to local-fs.target */ - - if (!nofail) /* auto + fail */ - return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); - else /* auto + nofail */ - return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true); - } - - return 0; -} - static int mount_add_device_links(Mount *m) { MountParameters *p; int r; assert(m); - if (!(p = get_mount_parameters_configured(m))) + p = get_mount_parameters_fragment(m); + if (!p) return 0; if (!p->what) return 0; if (!mount_is_bind(p) && - !path_equal(m->where, "/") && - p == &m->parameters_etc_fstab) { - bool nofail, noauto; - - noauto = !!mount_test_option(p->options, "noauto"); - nofail = !!mount_test_option(p->options, "nofail"); - - if ((r = unit_add_node_link(UNIT(m), p->what, - !noauto && nofail && - UNIT(m)->manager->running_as == MANAGER_SYSTEM)) < 0) + !path_equal(m->where, "/")) { + r = unit_add_node_link(UNIT(m), p->what, false); + if (r < 0) return r; } if (p->passno > 0 && !mount_is_bind(p) && - UNIT(m)->manager->running_as == MANAGER_SYSTEM && - !path_equal(m->where, "/")) { + !path_equal(m->where, "/") && + UNIT(m)->manager->running_as == MANAGER_SYSTEM) { char *name; Unit *fsck; /* Let's add in the fsck service */ /* aka SPECIAL_FSCK_SERVICE */ - if (!(name = unit_name_from_path_instance("fsck", p->what, ".service"))) + name = unit_name_from_path_instance("fsck", p->what, ".service"); + if (!name) return -ENOMEM; - if ((r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck)) < 0) { + r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck); + if (r < 0) { log_warning("Failed to prepare unit %s: %s", name, strerror(-r)); free(name); return r; } - free(name); SERVICE(fsck)->fsck_passno = p->passno; - if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0) + r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true); + if (r < 0) return r; } return 0; } +static int mount_add_quota_links(Mount *m) { + int r; + MountParameters *p; + + assert(m); + + if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) + return 0; + + p = get_mount_parameters_fragment(m); + if (!p) + return 0; + + if (!needs_quota(p)) + return 0; + + r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true); + if (r < 0) + return r; + + r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true); + if (r < 0) + return r; + + return 0; +} + static int mount_add_default_dependencies(Mount *m) { int r; MountParameters *p; + const char *after; assert(m); if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) return 0; - p = get_mount_parameters_configured(m); - if (p && needs_quota(p)) { - if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 || - (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0) - return r; - } + p = get_mount_parameters_fragment(m); + if (!p) + return 0; - if (!path_equal(m->where, "/")) - if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) - return r; + if (path_equal(m->where, "/")) + return 0; + + if (mount_is_network(p)) + after = SPECIAL_REMOTE_FS_PRE_TARGET; + else + after = SPECIAL_LOCAL_FS_PRE_TARGET; + + r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, after, NULL, true); + if (r < 0) + return r; + + r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); + if (r < 0) + return r; return 0; } @@ -505,7 +459,8 @@ static int mount_fix_timeouts(Mount *m) { assert(m); - if (!(p = get_mount_parameters_configured(m))) + p = get_mount_parameters_fragment(m); + if (!p) return 0; /* Allow configuration how long we wait for a device that @@ -550,7 +505,7 @@ static int mount_verify(Mount *m) { if (UNIT(m)->load_state != UNIT_LOADED) return 0; - if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo) + if (!m->from_fragment && !m->from_proc_self_mountinfo) return -ENOENT; if (!(e = unit_name_from_path(m->where, ".mount"))) @@ -599,11 +554,6 @@ static int mount_load(Unit *u) { if (UNIT(m)->fragment_path) m->from_fragment = true; - else if (m->from_etc_fstab) - /* We always add several default dependencies to fstab mounts, - * but we do not want the implicit complementing of Wants= with After= - * in the target unit that this mount unit will be hooked into. */ - UNIT(m)->default_dependencies = false; if (!m->where) if (!(m->where = unit_name_to_path(u->id))) @@ -637,10 +587,11 @@ static int mount_load(Unit *u) { if ((r = mount_add_automount_links(m)) < 0) return r; - if ((r = mount_add_fstab_links(m)) < 0) + r = mount_add_quota_links(m); + if (r < 0) return r; - if (UNIT(m)->default_dependencies || m->from_etc_fstab) + if (UNIT(m)->default_dependencies) if ((r = mount_add_default_dependencies(m)) < 0) return r; @@ -775,7 +726,6 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) { "%sWhat: %s\n" "%sFile System Type: %s\n" "%sOptions: %s\n" - "%sFrom /etc/fstab: %s\n" "%sFrom /proc/self/mountinfo: %s\n" "%sFrom fragment: %s\n" "%sDirectoryMode: %04o\n", @@ -785,7 +735,6 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) { prefix, strna(p->what), prefix, strna(p->fstype), prefix, strna(p->options), - prefix, yes_no(m->from_etc_fstab), prefix, yes_no(m->from_proc_self_mountinfo), prefix, yes_no(m->from_fragment), prefix, m->directory_mode); @@ -969,7 +918,7 @@ static void mount_enter_mounting(Mount *m) { mkdir_p(m->where, m->directory_mode); /* Create the source directory for bind-mounts if needed */ - p = get_mount_parameters_configured(m); + p = get_mount_parameters_fragment(m); if (p && mount_is_bind(p)) mkdir_p(p->what, m->directory_mode); @@ -982,12 +931,6 @@ static void mount_enter_mounting(Mount *m) { "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto", m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options, NULL); - else if (m->from_etc_fstab) - r = exec_command_set( - m->control_command, - "/bin/mount", - m->where, - NULL); else r = -ENOENT; @@ -1046,14 +989,7 @@ static void mount_enter_remounting(Mount *m) { NULL); free(buf); - } else if (m->from_etc_fstab) - r = exec_command_set( - m->control_command, - "/bin/mount", - m->where, - "-o", "remount", - NULL); - else + } else r = -ENOENT; if (r < 0) @@ -1232,7 +1168,7 @@ static bool mount_check_gc(Unit *u) { assert(m); - return m->from_etc_fstab || m->from_proc_self_mountinfo; + return m->from_proc_self_mountinfo; } static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { @@ -1416,7 +1352,6 @@ static int mount_add_one( const char *options, const char *fstype, int passno, - bool from_proc_self_mountinfo, bool set_flags) { int r; Unit *u; @@ -1430,8 +1365,6 @@ static int mount_add_one( assert(options); assert(fstype); - assert(!set_flags || from_proc_self_mountinfo); - /* Ignore API mount points. They should never be referenced in * dependencies ever. */ if (mount_point_is_api(where) || mount_point_ignore(where)) @@ -1483,21 +1416,15 @@ static int mount_add_one( goto fail; } - if (from_proc_self_mountinfo) { - p = &MOUNT(u)->parameters_proc_self_mountinfo; - - if (set_flags) { - MOUNT(u)->is_mounted = true; - MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; - MOUNT(u)->just_changed = !streq_ptr(p->options, o); - } - - MOUNT(u)->from_proc_self_mountinfo = true; - } else { - p = &MOUNT(u)->parameters_etc_fstab; - MOUNT(u)->from_etc_fstab = true; + p = &MOUNT(u)->parameters_proc_self_mountinfo; + if (set_flags) { + MOUNT(u)->is_mounted = true; + MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo; + MOUNT(u)->just_changed = !streq_ptr(p->options, o); } + MOUNT(u)->from_proc_self_mountinfo = true; + free(p->what); p->what = w; @@ -1545,68 +1472,6 @@ static int mount_find_pri(char *options) { return (int) r; } -static int mount_load_etc_fstab(Manager *m) { - FILE *f; - int r = 0; - struct mntent* me; - - assert(m); - - errno = 0; - f = setmntent("/etc/fstab", "r"); - if (!f) - return errno == ENOENT ? 0 : -errno; - - while ((me = getmntent(f))) { - char *where, *what; - int k; - - if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) { - r = -ENOMEM; - goto finish; - } - - if (!(where = strdup(me->mnt_dir))) { - free(what); - r = -ENOMEM; - goto finish; - } - - if (what[0] == '/') - path_kill_slashes(what); - - if (where[0] == '/') - path_kill_slashes(where); - - if (streq(me->mnt_type, "swap")) { - int pri; - - if ((pri = mount_find_pri(me->mnt_opts)) < 0) - k = pri; - else - k = swap_add_one(m, - what, - NULL, - pri, - !!mount_test_option(me->mnt_opts, "noauto"), - !!mount_test_option(me->mnt_opts, "nofail"), - false); - } else - k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false); - - free(what); - free(where); - - if (k < 0) - r = k; - } - -finish: - - endmntent(f); - return r; -} - static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { int r = 0; unsigned i; @@ -1659,7 +1524,7 @@ static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { goto finish; } - if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0) + if ((k = mount_add_one(m, d, p, o, fstype, 0, set_flags)) < 0) r = k; clean_up: @@ -1715,9 +1580,6 @@ static int mount_enumerate(Manager *m) { return -errno; } - if ((r = mount_load_etc_fstab(m)) < 0) - goto fail; - if ((r = mount_load_proc_self_mountinfo(m, false)) < 0) goto fail; diff --git a/src/core/mount.h b/src/core/mount.h index 3153a2a9..ad9efc34 100644 --- a/src/core/mount.h +++ b/src/core/mount.h @@ -75,11 +75,9 @@ struct Mount { char *where; - MountParameters parameters_etc_fstab; MountParameters parameters_proc_self_mountinfo; MountParameters parameters_fragment; - bool from_etc_fstab:1; bool from_proc_self_mountinfo:1; bool from_fragment:1; diff --git a/src/core/swap.c b/src/core/swap.c index ba4413bd..f677d65b 100644 --- a/src/core/swap.c +++ b/src/core/swap.c @@ -87,7 +87,7 @@ static void swap_init(Unit *u) { s->exec_context.std_output = u->manager->default_std_output; s->exec_context.std_error = u->manager->default_std_error; - s->parameters_etc_fstab.priority = s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; + s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; s->timer_watch.type = WATCH_INVALID; @@ -116,9 +116,8 @@ static void swap_done(Unit *u) { free(s->what); s->what = NULL; - free(s->parameters_etc_fstab.what); free(s->parameters_fragment.what); - s->parameters_etc_fstab.what = s->parameters_fragment.what = NULL; + s->parameters_fragment.what = NULL; exec_context_done(&s->exec_context); exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); @@ -166,28 +165,16 @@ static int swap_add_mount_links(Swap *s) { static int swap_add_target_links(Swap *s) { Unit *tu; - SwapParameters *p; int r; assert(s); - if (s->from_fragment) - p = &s->parameters_fragment; - else if (s->from_etc_fstab) - p = &s->parameters_etc_fstab; - else + if (!s->from_fragment) return 0; if ((r = manager_load_unit(UNIT(s)->manager, SPECIAL_SWAP_TARGET, NULL, NULL, &tu)) < 0) return r; - if (!p->noauto && - !p->nofail && - s->from_etc_fstab && - UNIT(s)->manager->running_as == MANAGER_SYSTEM) - if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(s), true)) < 0) - return r; - return unit_add_dependency(UNIT(s), UNIT_BEFORE, tu, true); } @@ -201,8 +188,6 @@ static int swap_add_device_links(Swap *s) { if (s->from_fragment) p = &s->parameters_fragment; - else if (s->from_etc_fstab) - p = &s->parameters_etc_fstab; else return 0; @@ -222,11 +207,12 @@ static int swap_add_default_dependencies(Swap *s) { assert(s); - if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) { + if (UNIT(s)->manager->running_as != MANAGER_SYSTEM) + return 0; - if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) - return r; - } + r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); + if (r < 0) + return r; return 0; } @@ -278,8 +264,6 @@ static int swap_load(Unit *u) { if (!s->what) { if (s->parameters_fragment.what) s->what = strdup(s->parameters_fragment.what); - else if (s->parameters_etc_fstab.what) - s->what = strdup(s->parameters_etc_fstab.what); else if (s->parameters_proc_swaps.what) s->what = strdup(s->parameters_proc_swaps.what); else @@ -315,7 +299,7 @@ static int swap_load(Unit *u) { return swap_verify(s); } -int swap_add_one( +static int swap_add_one( Manager *m, const char *what, const char *what_proc_swaps, @@ -329,9 +313,11 @@ int swap_add_one( bool delete = false; int r; SwapParameters *p; + Swap *first; assert(m); assert(what); + assert(what_proc_swaps); e = unit_name_from_path(what, ".swap"); if (!e) @@ -339,8 +325,7 @@ int swap_add_one( u = manager_get_unit(m, e); - if (what_proc_swaps && - u && + if (u && SWAP(u)->from_proc_swaps && !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) return -EEXIST; @@ -368,54 +353,37 @@ int swap_add_one( } else delete = false; - if (what_proc_swaps) { - Swap *first; + p = &SWAP(u)->parameters_proc_swaps; - p = &SWAP(u)->parameters_proc_swaps; + if (!p->what) { + if (!(wp = strdup(what_proc_swaps))) { + r = -ENOMEM; + goto fail; + } - if (!p->what) { - if (!(wp = strdup(what_proc_swaps))) { + if (!m->swaps_by_proc_swaps) + if (!(m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func))) { r = -ENOMEM; goto fail; } - if (!m->swaps_by_proc_swaps) - if (!(m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func))) { - r = -ENOMEM; - goto fail; - } - - free(p->what); - p->what = wp; - - first = hashmap_get(m->swaps_by_proc_swaps, wp); - LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u)); - - if ((r = hashmap_replace(m->swaps_by_proc_swaps, wp, first)) < 0) - goto fail; - } - - if (set_flags) { - SWAP(u)->is_active = true; - SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; - } - - SWAP(u)->from_proc_swaps = true; + free(p->what); + p->what = wp; - } else { - p = &SWAP(u)->parameters_etc_fstab; + first = hashmap_get(m->swaps_by_proc_swaps, wp); + LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u)); - if (!(wp = strdup(what))) { - r = -ENOMEM; + if ((r = hashmap_replace(m->swaps_by_proc_swaps, wp, first)) < 0) goto fail; - } - - free(p->what); - p->what = wp; + } - SWAP(u)->from_etc_fstab = true; + if (set_flags) { + SWAP(u)->is_active = true; + SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; } + SWAP(u)->from_proc_swaps = true; + p->priority = priority; p->noauto = noauto; p->nofail = nofail; @@ -567,8 +535,6 @@ static void swap_dump(Unit *u, FILE *f, const char *prefix) { p = &s->parameters_proc_swaps; else if (s->from_fragment) p = &s->parameters_fragment; - else - p = &s->parameters_etc_fstab; fprintf(f, "%sSwap State: %s\n" @@ -577,7 +543,6 @@ static void swap_dump(Unit *u, FILE *f, const char *prefix) { "%sPriority: %i\n" "%sNoAuto: %s\n" "%sNoFail: %s\n" - "%sFrom /etc/fstab: %s\n" "%sFrom /proc/swaps: %s\n" "%sFrom fragment: %s\n", prefix, swap_state_to_string(s->state), @@ -586,7 +551,6 @@ static void swap_dump(Unit *u, FILE *f, const char *prefix) { prefix, p->priority, prefix, yes_no(p->noauto), prefix, yes_no(p->nofail), - prefix, yes_no(s->from_etc_fstab), prefix, yes_no(s->from_proc_swaps), prefix, yes_no(s->from_fragment)); @@ -732,8 +696,6 @@ static void swap_enter_activating(Swap *s) { if (s->from_fragment) priority = s->parameters_fragment.priority; - else if (s->from_etc_fstab) - priority = s->parameters_etc_fstab.priority; else priority = -1; @@ -928,7 +890,7 @@ static bool swap_check_gc(Unit *u) { assert(s); - return s->from_etc_fstab || s->from_proc_swaps; + return s->from_proc_swaps; } static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { @@ -1269,8 +1231,6 @@ static int swap_enumerate(Manager *m) { return -errno; } - /* We rely on mount.c to load /etc/fstab for us */ - if ((r = swap_load_proc_swaps(m, false)) < 0) swap_shutdown(m); diff --git a/src/core/swap.h b/src/core/swap.h index 2a6fceec..ff12169b 100644 --- a/src/core/swap.h +++ b/src/core/swap.h @@ -71,11 +71,9 @@ struct Swap { char *what; - SwapParameters parameters_etc_fstab; SwapParameters parameters_proc_swaps; SwapParameters parameters_fragment; - bool from_etc_fstab:1; bool from_proc_swaps:1; bool from_fragment:1; @@ -108,8 +106,6 @@ struct Swap { extern const UnitVTable swap_vtable; -int swap_add_one(Manager *m, const char *what, const char *what_proc_swaps, int prio, bool no_auto, bool no_fail, bool set_flags); - int swap_add_one_mount_link(Swap *s, Mount *m); int swap_dispatch_reload(Manager *m); diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c index edc28998..c0b1cf09 100644 --- a/src/cryptsetup/cryptsetup-generator.c +++ b/src/cryptsetup/cryptsetup-generator.c @@ -112,6 +112,7 @@ static int create_disk( } fprintf(f, + "# Automatically generated by systemd-cryptsetup-generator\n\n" "[Unit]\n" "Description=Cryptography Setup for %%I\n" "Conflicts=umount.target\n" diff --git a/src/fstab-generator/Makefile b/src/fstab-generator/Makefile new file mode 120000 index 00000000..d0b0e8e0 --- /dev/null +++ b/src/fstab-generator/Makefile @@ -0,0 +1 @@ +../Makefile \ No newline at end of file diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c new file mode 100644 index 00000000..39af18a9 --- /dev/null +++ b/src/fstab-generator/fstab-generator.c @@ -0,0 +1,517 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include +#include +#include +#include + +#include "log.h" +#include "util.h" +#include "unit-name.h" +#include "path-util.h" +#include "mount-setup.h" +#include "special.h" +#include "mkdir.h" + +static const char *arg_dest = "/tmp"; + +static int device_name(const char *path, char **unit) { + char *p; + + assert(path); + + if (!is_device_path(path)) + return 0; + + p = unit_name_from_path(path, ".device"); + if (!p) + return -ENOMEM; + + *unit = p; + return 1; +} + +static int mount_find_pri(struct mntent *me, int *ret) { + char *end, *pri; + unsigned long r; + + assert(me); + assert(ret); + + pri = hasmntopt(me, "pri"); + if (!pri) + return 0; + + pri += 4; + + errno = 0; + r = strtoul(pri, &end, 10); + if (errno != 0) + return -errno; + + if (end == pri || (*end != ',' && *end != 0)) + return -EINVAL; + + *ret = (int) r; + return 1; +} + +static int add_swap(const char *what, struct mntent *me) { + char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL; + FILE *f = NULL; + bool noauto, nofail; + int r, pri = -1; + + assert(what); + assert(me); + + r = mount_find_pri(me, &pri); + if (r < 0) { + log_error("Failed to parse priority"); + return pri; + } + + noauto = !!hasmntopt(me, "noauto"); + nofail = !!hasmntopt(me, "nofail"); + + name = unit_name_from_path(what, ".swap"); + if (!name) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + unit = join(arg_dest, "/", name, NULL); + if (!unit) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + f = fopen(unit, "wxe"); + if (!f) { + r = -errno; + log_error("Failed to create unit file: %m"); + goto finish; + } + + fputs("# Automatically generated by systemd-fstab-generator\n\n" + "[Unit]\n" + "DefaultDependencies=no\n" + "Conflicts=" SPECIAL_UMOUNT_TARGET "\n" + "Before=" SPECIAL_UMOUNT_TARGET "\n", f); + + if (!noauto && !nofail) + fputs("Before=" SPECIAL_SWAP_TARGET "\n", f); + + fprintf(f, + "\n" + "[Swap]\n" + "What=%s\n", + what); + + if (pri >= 0) + fprintf(f, + "Priority=%i\n", + pri); + + fflush(f); + if (ferror(f)) { + log_error("Failed to write unit file: %m"); + r = -errno; + goto finish; + } + + if (!noauto) { + lnk = join(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL); + if (!lnk) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + mkdir_parents(lnk, 0755); + if (symlink(unit, lnk) < 0) { + log_error("Failed to create symlink: %m"); + r = -errno; + goto finish; + } + + r = device_name(what, &device); + if (r < 0) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + if (r > 0) { + free(lnk); + lnk = join(arg_dest, "/", device, ".wants/", name, NULL); + if (!lnk) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + mkdir_parents(lnk, 0755); + if (symlink(unit, lnk) < 0) { + log_error("Failed to create symlink: %m"); + r = -errno; + goto finish; + } + } + } + + r = 0; +finish: + if (f) + fclose(f); + + free(unit); + free(lnk); + free(name); + free(device); + + return r; +} + +static bool mount_is_bind(struct mntent *me) { + assert(me); + + return + hasmntopt(me, "bind") || + streq(me->mnt_opts, "bind"); +} + +static bool mount_is_network(struct mntent *me) { + assert(me); + + return + hasmntopt(me, "_netdev") || + fstype_is_network(me->mnt_type); +} + +static int add_mount(const char *what, const char *where, struct mntent *me) { + char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL, *automount_name = NULL, *automount_unit = NULL; + FILE *f = NULL; + bool noauto, nofail, automount, isbind, isnetwork; + int r; + const char *post, *pre; + + assert(what); + assert(where); + assert(me); + + if (streq(me->mnt_type, "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; + + isnetwork = mount_is_network(me); + isbind = mount_is_bind(me); + + noauto = !!hasmntopt(me, "noauto"); + nofail = !!hasmntopt(me, "nofail"); + automount = + hasmntopt(me, "comment=systemd.automount") || + hasmntopt(me, "x-systemd.automount"); + + if (isnetwork) { + post = SPECIAL_REMOTE_FS_TARGET; + pre = SPECIAL_REMOTE_FS_PRE_TARGET; + } else { + post = SPECIAL_LOCAL_FS_TARGET; + pre = SPECIAL_LOCAL_FS_PRE_TARGET; + } + + name = unit_name_from_path(where, ".mount"); + if (!name) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + unit = join(arg_dest, "/", name, NULL); + if (!unit) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + f = fopen(unit, "wxe"); + if (!f) { + r = -errno; + log_error("Failed to create unit file: %m"); + goto finish; + } + + fputs("# Automatically generated by systemd-fstab-generator\n\n" + "[Unit]\n" + "DefaultDependencies=no\n", f); + + if (!path_equal(where, "/")) + fprintf(f, + "After=%s\n" + "Wants=%s\n" + "Conflicts=" SPECIAL_UMOUNT_TARGET "\n" + "Before=" SPECIAL_UMOUNT_TARGET "\n", + pre, + pre); + + + if (!noauto && !nofail && !automount) + fprintf(f, + "Before=%s\n", + post); + + fprintf(f, + "\n" + "[Mount]\n" + "What=%s\n" + "Where=%s\n" + "Type=%s\n" + "FsckPassNo=%i\n", + what, + where, + me->mnt_type, + me->mnt_passno); + + if (!isempty(me->mnt_opts) && + !streq(me->mnt_opts, "defaults")) + fprintf(f, + "Options=%s\n", + me->mnt_opts); + + fflush(f); + if (ferror(f)) { + log_error("Failed to write unit file: %m"); + r = -errno; + goto finish; + } + + if (!noauto) { + lnk = join(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL); + if (!lnk) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + mkdir_parents(lnk, 0755); + if (symlink(unit, lnk) < 0) { + log_error("Failed to create symlink: %m"); + r = -errno; + goto finish; + } + + if (!isbind && + !path_equal(where, "/")) { + + r = device_name(what, &device); + if (r < 0) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + if (r > 0) { + free(lnk); + lnk = join(arg_dest, "/", device, ".wants/", name, NULL); + if (!lnk) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + mkdir_parents(lnk, 0755); + if (symlink(unit, lnk) < 0) { + log_error("Failed to creat symlink: %m"); + r = -errno; + goto finish; + } + } + } + } + + if (automount && !path_equal(where, "/")) { + automount_name = unit_name_from_path(where, ".automount"); + if (!name) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + automount_unit = join(arg_dest, "/", automount_name, NULL); + if (!automount_unit) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + fclose(f); + f = fopen(automount_unit, "wxe"); + if (!f) { + r = -errno; + log_error("Failed to create unit file: %m"); + goto finish; + } + + fprintf(f, + "# Automatically generated by systemd-fstab-generator\n\n" + "[Unit]\n" + "DefaultDependencies=no\n" + "Conflicts=" SPECIAL_UMOUNT_TARGET "\n" + "Before=" SPECIAL_UMOUNT_TARGET " %s\n" + "\n" + "[Automount]\n" + "Where=%s\n", + post, + where); + + fflush(f); + if (ferror(f)) { + log_error("Failed to write unit file: %m"); + r = -errno; + goto finish; + } + + free(lnk); + lnk = join(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL); + if (!lnk) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + mkdir_parents(lnk, 0755); + if (symlink(automount_unit, lnk) < 0) { + log_error("Failed to create symlink: %m"); + r = -errno; + goto finish; + } + } + + r = 0; +finish: + if (f) + fclose(f); + + free(unit); + free(lnk); + free(name); + free(device); + free(automount_name); + free(automount_unit); + + return r; +} + +static int parse_fstab(void) { + FILE *f; + int r = 0; + struct mntent *me; + + errno = 0; + f = setmntent("/etc/fstab", "r"); + if (!f) { + if (errno == ENOENT) + return 0; + + log_error("Failed to open /etc/fstab: %m"); + return -errno; + } + + while ((me = getmntent(f))) { + char *where, *what; + int k; + + what = fstab_node_to_udev_node(me->mnt_fsname); + if (!what) { + log_error("Out of memory"); + r = -ENOMEM; + goto finish; + } + + where = strdup(me->mnt_dir); + if (!where) { + log_error("Out of memory"); + free(what); + r = -ENOMEM; + goto finish; + } + + if (is_path(what)) + path_kill_slashes(what); + + if (is_path(where)) + path_kill_slashes(where); + + log_debug("Found entry what=%s where=%s type=%s", what, where, me->mnt_type); + + if (streq(me->mnt_type, "swap")) + k = add_swap(what, me); + else + k = add_mount(what, where, me); + + free(what); + free(where); + + if (k < 0) + r = k; + } + +finish: + endmntent(f); + return r; +} + +int main(int argc, char *argv[]) { + int r; + + if (argc > 2) { + log_error("This program takes one or no arguments."); + return EXIT_FAILURE; + } + + if (argc > 1) + arg_dest = argv[1]; + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + log_set_max_level(LOG_DEBUG); + + umask(0022); + + r = parse_fstab(); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} -- 2.39.5