***/
#include <errno.h>
+#include <limits.h>
+#include <sys/mount.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/epoll.h>
+#include <sys/stat.h>
+#include <linux/auto_fs4.h>
+#include <linux/auto_dev-ioctl.h>
#include "unit.h"
#include "automount.h"
#include "load-fragment.h"
#include "load-dropin.h"
+#include "unit-name.h"
static const UnitActiveState state_translation_table[_AUTOMOUNT_STATE_MAX] = {
[AUTOMOUNT_DEAD] = UNIT_INACTIVE,
[AUTOMOUNT_MAINTAINANCE] = "maintainance"
};
+static char *automount_name_from_where(const char *where) {
+ assert(where);
+
+ if (streq(where, "/"))
+ return strdup("-.automount");
+
+ return unit_name_build_escape(where+1, NULL, ".automount");
+}
+
static void automount_init(Unit *u) {
Automount *a = AUTOMOUNT(u);
- a->state = 0;
+ assert(u);
+ assert(u->meta.load_state == UNIT_STUB);
+
+ a->pipe_watch.fd = a->pipe_fd = -1;
+}
+
+static void repeat_unmout(const char *path) {
+ assert(path);
+
+ for (;;) {
+
+ if (umount2(path, MNT_DETACH) >= 0)
+ continue;
+
+ if (errno != EINVAL)
+ log_error("Failed to unmount: %m");
+
+ break;
+ }
+}
+
+static void unmount_autofs(Automount *a) {
+ assert(a);
+
+ if (a->pipe_fd < 0)
+ return;
+
+ automount_send_ready(a, -EHOSTDOWN);
+
+ unit_unwatch_fd(UNIT(a), &a->pipe_watch);
+ close_nointr_nofail(a->pipe_fd);
+ a->pipe_fd = -1;
+
+ repeat_unmout(a->where);
+}
+
+static void automount_done(Unit *u) {
+ Automount *a = AUTOMOUNT(u);
+
+ assert(a);
+
+ unmount_autofs(a);
a->mount = NULL;
+
+ if (a->tokens) {
+ set_free(a->tokens);
+ a->tokens = NULL;
+ }
+}
+
+static int automount_verify(Automount *a) {
+ bool b;
+ char *e;
+ assert(a);
+
+ if (UNIT(a)->meta.load_state != UNIT_LOADED)
+ return 0;
+
+ if (!a->where) {
+ log_error("%s lacks Where setting. Refusing.", UNIT(a)->meta.id);
+ return -EINVAL;
+ }
+
+ path_kill_slashes(a->where);
+
+ if (!(e = automount_name_from_where(a->where)))
+ return -ENOMEM;
+
+ b = unit_has_name(UNIT(a), e);
+ free(e);
+
+ if (!b) {
+ log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(a)->meta.id);
+ return -EINVAL;
+ }
+
+ return 0;
}
static int automount_load(Unit *u) {
return r;
}
- return 0;
+ return automount_verify(a);
}
-static void automount_done(Unit *u) {
- Automount *a = AUTOMOUNT(u);
-
+static void automount_set_state(Automount *a, AutomountState state) {
+ AutomountState old_state;
assert(a);
- a->mount = NULL;
+ old_state = a->state;
+ a->state = state;
+
+ if (state != AUTOMOUNT_WAITING &&
+ state != AUTOMOUNT_RUNNING)
+ unmount_autofs(a);
+
+ if (state != old_state)
+ log_debug("%s changed %s → %s", UNIT(a)->meta.id, state_string_table[old_state], state_string_table[state]);
+
+ unit_notify(UNIT(a), state_translation_table[old_state], state_translation_table[state]);
}
static void automount_dump(Unit *u, FILE *f, const char *prefix) {
prefix, state_string_table[s->state]);
}
+static void automount_enter_dead(Automount *a, bool success) {
+ assert(a);
+
+ if (!success)
+ a->failure = true;
+
+ automount_set_state(a, a->failure ? AUTOMOUNT_MAINTAINANCE : AUTOMOUNT_DEAD);
+}
+
+static int open_dev_autofs(Manager *m) {
+ struct autofs_dev_ioctl param;
+
+ assert(m);
+
+ if (m->dev_autofs_fd >= 0)
+ return m->dev_autofs_fd;
+
+ if ((m->dev_autofs_fd = open("/dev/autofs", O_RDONLY)) < 0) {
+ log_error("Failed to open /dev/autofs: %s", strerror(errno));
+ return -errno;
+ }
+
+ init_autofs_dev_ioctl(¶m);
+ if (ioctl(m->dev_autofs_fd, AUTOFS_DEV_IOCTL_VERSION, ¶m) < 0) {
+ close_nointr_nofail(m->dev_autofs_fd);
+ m->dev_autofs_fd = -1;
+ return -errno;
+ }
+
+ log_debug("Autofs kernel version %i.%i", param.ver_major, param.ver_minor);
+
+ return m->dev_autofs_fd;
+}
+
+static int open_ioctl_fd(int dev_autofs_fd, const char *where, dev_t devid) {
+ struct autofs_dev_ioctl *param;
+ size_t l;
+ int r;
+
+ assert(dev_autofs_fd >= 0);
+ assert(where);
+
+ l = sizeof(struct autofs_dev_ioctl) + strlen(where) + 1;
+
+ if (!(param = malloc(l)))
+ return -ENOMEM;
+
+ init_autofs_dev_ioctl(param);
+ param->size = l;
+ param->ioctlfd = -1;
+ param->openmount.devid = devid;
+ strcpy(param->path, where);
+
+ if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_OPENMOUNT, param) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (param->ioctlfd < 0) {
+ r = -EIO;
+ goto finish;
+ }
+
+ r = param->ioctlfd;
+
+finish:
+ free(param);
+ return r;
+}
+
+static int autofs_protocol(int dev_autofs_fd, int ioctl_fd) {
+ uint32_t major, minor;
+ struct autofs_dev_ioctl param;
+
+ assert(dev_autofs_fd >= 0);
+ assert(ioctl_fd >= 0);
+
+ init_autofs_dev_ioctl(¶m);
+ param.ioctlfd = ioctl_fd;
+
+ if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_PROTOVER, ¶m) < 0)
+ return -errno;
+
+ major = param.protover.version;
+
+ init_autofs_dev_ioctl(¶m);
+ param.ioctlfd = ioctl_fd;
+
+ if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_PROTOSUBVER, ¶m) < 0)
+ return -errno;
+
+ minor = param.protosubver.sub_version;
+
+ log_debug("Autofs protocol version %i.%i", major, minor);
+ return 0;
+}
+
+static int autofs_set_timeout(int dev_autofs_fd, int ioctl_fd, time_t sec) {
+ struct autofs_dev_ioctl param;
+
+ assert(dev_autofs_fd >= 0);
+ assert(ioctl_fd >= 0);
+
+ init_autofs_dev_ioctl(¶m);
+ param.ioctlfd = ioctl_fd;
+ param.timeout.timeout = sec;
+
+ if (ioctl(dev_autofs_fd, AUTOFS_DEV_IOCTL_TIMEOUT, ¶m) < 0)
+ return -errno;
+
+ return 0;
+}
+
+static int autofs_send_ready(int dev_autofs_fd, int ioctl_fd, uint32_t token, int status) {
+ struct autofs_dev_ioctl param;
+
+ assert(dev_autofs_fd >= 0);
+ assert(ioctl_fd >= 0);
+
+ init_autofs_dev_ioctl(¶m);
+ param.ioctlfd = ioctl_fd;
+
+ if (status) {
+ param.fail.token = token;
+ param.fail.status = status;
+ } else
+ param.ready.token = token;
+
+ if (ioctl(dev_autofs_fd, status ? AUTOFS_DEV_IOCTL_FAIL : AUTOFS_DEV_IOCTL_READY, ¶m) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int automount_send_ready(Automount *a, int status) {
+ int ioctl_fd, r;
+ unsigned token;
+
+ assert(a);
+ assert(status <= 0);
+
+ if (set_isempty(a->tokens))
+ return 0;
+
+ if ((ioctl_fd = open_ioctl_fd(UNIT(a)->meta.manager->dev_autofs_fd, a->where, a->dev_id)) < 0) {
+ r = ioctl_fd;
+ goto fail;
+ }
+
+ if (status)
+ log_debug("Sending failure: %s", strerror(-status));
+ else
+ log_debug("Sending success.");
+
+ /* Autofs thankfully does not hand out 0 as a token */
+ while ((token = PTR_TO_UINT(set_steal_first(a->tokens)))) {
+ int k;
+
+ /* Autofs fun fact II:
+ *
+ * if you pass a positive status code here, the kernel will
+ * freeze! Yay! */
+
+ if ((k = autofs_send_ready(UNIT(a)->meta.manager->dev_autofs_fd,
+ ioctl_fd,
+ token,
+ status)) < 0)
+ r = k;
+ }
+
+ r = 0;
+
+fail:
+ if (ioctl_fd >= 0)
+ close_nointr_nofail(ioctl_fd);
+
+ return r;
+}
+
+static void automount_enter_waiting(Automount *a) {
+ int p[2] = { -1, -1 };
+ char name[32], options[128];
+ bool mounted = false;
+ int r, ioctl_fd = -1, dev_autofs_fd;
+ struct stat st;
+
+ assert(a);
+ assert(a->pipe_fd < 0);
+ assert(a->where);
+
+ if (a->tokens)
+ set_clear(a->tokens);
+ else if (!(a->tokens = set_new(trivial_hash_func, trivial_compare_func))) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ if ((dev_autofs_fd = open_dev_autofs(UNIT(a)->meta.manager)) < 0) {
+ r = dev_autofs_fd;
+ goto fail;
+ }
+
+ /* We knowingly ignore the results of this call */
+ mkdir_p(a->where, 0555);
+
+ if (pipe2(p, O_NONBLOCK) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ snprintf(options, sizeof(options), "fd=%i,pgrp=%u,minproto=5,maxproto=5,direct", p[1], (unsigned) getpgrp());
+ char_array_0(options);
+
+ snprintf(name, sizeof(name), "systemd-%u", (unsigned) getpid());
+ char_array_0(name);
+
+ if (mount(name, a->where, "autofs", 0, options) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ mounted = true;
+
+ close_nointr_nofail(p[1]);
+ p[1] = -1;
+
+ if (stat(a->where, &st) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if ((ioctl_fd = open_ioctl_fd(dev_autofs_fd, a->where, st.st_dev)) < 0) {
+ r = ioctl_fd;
+ goto fail;
+ }
+
+ if ((r = autofs_protocol(dev_autofs_fd, ioctl_fd)) < 0)
+ goto fail;
+
+ if ((r = autofs_set_timeout(dev_autofs_fd, ioctl_fd, 300)) < 0)
+ goto fail;
+
+ /* Autofs fun fact:
+ *
+ * Unless we close the ioctl fd here, for some weird reason
+ * the direct mount will not receive events from the
+ * kernel. */
+
+ close_nointr_nofail(ioctl_fd);
+ ioctl_fd = -1;
+
+ if ((r = unit_watch_fd(UNIT(a), p[0], EPOLLIN, &a->pipe_watch)) < 0)
+ goto fail;
+
+ a->pipe_fd = p[0];
+ a->dev_id = st.st_dev;
+
+ automount_set_state(a, AUTOMOUNT_WAITING);
+
+ return;
+
+fail:
+ assert_se(close_pipe(p) == 0);
+
+ if (ioctl_fd >= 0)
+ close_nointr_nofail(ioctl_fd);
+
+ if (mounted)
+ repeat_unmout(a->where);
+
+ log_error("Failed to initialize automounter: %s", strerror(-r));
+ automount_enter_dead(a, false);
+}
+
+static void automount_enter_runnning(Automount *a) {
+ int r;
+ struct stat st;
+
+ assert(a);
+ assert(a->mount);
+
+ /* Before we do anything, let's see if somebody is playing games with us? */
+
+ if (stat(a->where, &st) < 0) {
+ log_warning("%s failed stat automount point: %m", a->meta.id);
+ goto fail;
+ }
+
+ if (!S_ISDIR(st.st_mode) || st.st_dev != a->dev_id)
+ log_info("%s's automount point already active?", a->meta.id);
+ else if ((r = manager_add_job(UNIT(a)->meta.manager, JOB_START, UNIT(a->mount), JOB_REPLACE, true, NULL)) < 0) {
+ log_warning("%s failed to queue mount startup job: %s", a->meta.id, strerror(-r));
+ goto fail;
+ }
+
+ automount_set_state(a, AUTOMOUNT_RUNNING);
+ return;
+
+fail:
+ automount_enter_dead(a, false);
+}
+
+static int automount_start(Unit *u) {
+ Automount *a = AUTOMOUNT(u);
+
+ assert(a);
+
+ if (path_is_mount_point(a->where)) {
+ log_error("Path %s is already a mount point, refusing start for %s", a->where, u->meta.id);
+ return -EEXIST;
+ }
+
+ assert(a->state == AUTOMOUNT_DEAD || a->state == AUTOMOUNT_MAINTAINANCE);
+
+ a->failure = false;
+ automount_enter_waiting(a);
+ return 0;
+}
+
+static int automount_stop(Unit *u) {
+ Automount *a = AUTOMOUNT(u);
+
+ assert(a);
+
+ assert(a->state == AUTOMOUNT_WAITING || a->state == AUTOMOUNT_RUNNING);
+
+ automount_enter_dead(a, true);
+ return 0;
+}
+
static UnitActiveState automount_active_state(Unit *u) {
return state_translation_table[AUTOMOUNT(u)->state];
return state_string_table[AUTOMOUNT(u)->state];
}
+static void automount_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
+ union autofs_v5_packet_union packet;
+ ssize_t l;
+ int r;
+
+ Automount *a = AUTOMOUNT(u);
+
+ assert(a);
+ assert(fd == a->pipe_fd);
+
+ if (events != EPOLLIN) {
+ log_error("Got invalid poll event on pipe.");
+ goto fail;
+ }
+
+ if ((l = loop_read(a->pipe_fd, &packet, sizeof(packet))) != sizeof(packet)) {
+ log_error("Invalid read from pipe: %s", l < 0 ? strerror(-l) : "short read");
+ goto fail;
+ }
+
+ switch (packet.hdr.type) {
+
+ case autofs_ptype_missing_direct:
+ log_debug("Got direct mount request for %s", packet.v5_packet.name);
+
+ if ((r = set_put(a->tokens, UINT_TO_PTR(packet.v5_packet.wait_queue_token))) < 0) {
+ log_error("Failed to remember token: %s", strerror(-r));
+ goto fail;
+ }
+
+ automount_enter_runnning(a);
+ break;
+
+ default:
+ log_error("Received unknown automount request %i", packet.hdr.type);
+ break;
+ }
+
+ return;
+
+fail:
+ automount_enter_dead(a, false);
+}
+
+static void automount_shutdown(Manager *m) {
+ assert(m);
+
+ if (m->dev_autofs_fd >= 0)
+ close_nointr_nofail(m->dev_autofs_fd);
+}
+
const UnitVTable automount_vtable = {
- .suffix = ".mount",
+ .suffix = ".automount",
.no_alias = true,
+ .no_instances = true,
.init = automount_init,
.load = automount_load,
.dump = automount_dump,
+ .start = automount_start,
+ .stop = automount_stop,
+
.active_state = automount_active_state,
- .sub_state_to_string = automount_sub_state_to_string
+ .sub_state_to_string = automount_sub_state_to_string,
+
+ .fd_event = automount_fd_event,
+
+ .shutdown = automount_shutdown
};
AutomountState state;
+ char *where;
+
Mount *mount;
+
+ int pipe_fd;
+ Watch pipe_watch;
+ dev_t dev_id;
+
+ Set *tokens;
+
+ bool failure:1;
};
extern const UnitVTable automount_vtable;
+int automount_send_ready(Automount *a, int status);
+
#endif
goto fail;
}
- if (setsid() < 0) {
- r = EXIT_SETSID;
- goto fail;
- }
+ if (!context->no_setsid)
+ if (setsid() < 0) {
+ r = EXIT_SETSID;
+ goto fail;
+ }
umask(context->umask);
bool cpu_affinity_set:1;
bool timer_slack_ns_set:1;
+ /* This is not exposed to the user but available
+ * internally. We need it to make sure that whenever we spawn
+ * /bin/mount it is run in the same process group as us so
+ * that the autofs logic detects that it belongs to us and we
+ * don't enter a trigger loop. */
+ bool no_setsid:1;
+
bool cpu_sched_reset_on_fork;
bool non_blocking;
--- /dev/null
+/*
+ * Copyright 2008 Red Hat, Inc. All rights reserved.
+ * Copyright 2008 Ian Kent <raven@themaw.net>
+ *
+ * This file is part of the Linux kernel and is made available under
+ * the terms of the GNU General Public License, version 2, or at your
+ * option, any later version, incorporated herein by reference.
+ */
+
+#ifndef _LINUX_AUTO_DEV_IOCTL_H
+#define _LINUX_AUTO_DEV_IOCTL_H
+
+#include <linux/auto_fs.h>
+
+#ifdef __KERNEL__
+#include <linux/string.h>
+#else
+#include <string.h>
+#endif /* __KERNEL__ */
+
+#define AUTOFS_DEVICE_NAME "autofs"
+
+#define AUTOFS_DEV_IOCTL_VERSION_MAJOR 1
+#define AUTOFS_DEV_IOCTL_VERSION_MINOR 0
+
+#define AUTOFS_DEVID_LEN 16
+
+#define AUTOFS_DEV_IOCTL_SIZE sizeof(struct autofs_dev_ioctl)
+
+/*
+ * An ioctl interface for autofs mount point control.
+ */
+
+struct args_protover {
+ __u32 version;
+};
+
+struct args_protosubver {
+ __u32 sub_version;
+};
+
+struct args_openmount {
+ __u32 devid;
+};
+
+struct args_ready {
+ __u32 token;
+};
+
+struct args_fail {
+ __u32 token;
+ __s32 status;
+};
+
+struct args_setpipefd {
+ __s32 pipefd;
+};
+
+struct args_timeout {
+ __u64 timeout;
+};
+
+struct args_requester {
+ __u32 uid;
+ __u32 gid;
+};
+
+struct args_expire {
+ __u32 how;
+};
+
+struct args_askumount {
+ __u32 may_umount;
+};
+
+struct args_ismountpoint {
+ union {
+ struct args_in {
+ __u32 type;
+ } in;
+ struct args_out {
+ __u32 devid;
+ __u32 magic;
+ } out;
+ };
+};
+
+/*
+ * All the ioctls use this structure.
+ * When sending a path size must account for the total length
+ * of the chunk of memory otherwise is is the size of the
+ * structure.
+ */
+
+struct autofs_dev_ioctl {
+ __u32 ver_major;
+ __u32 ver_minor;
+ __u32 size; /* total size of data passed in
+ * including this struct */
+ __s32 ioctlfd; /* automount command fd */
+
+ /* Command parameters */
+
+ union {
+ struct args_protover protover;
+ struct args_protosubver protosubver;
+ struct args_openmount openmount;
+ struct args_ready ready;
+ struct args_fail fail;
+ struct args_setpipefd setpipefd;
+ struct args_timeout timeout;
+ struct args_requester requester;
+ struct args_expire expire;
+ struct args_askumount askumount;
+ struct args_ismountpoint ismountpoint;
+ };
+
+ char path[0];
+};
+
+static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
+{
+ memset(in, 0, sizeof(struct autofs_dev_ioctl));
+ in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
+ in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
+ in->size = sizeof(struct autofs_dev_ioctl);
+ in->ioctlfd = -1;
+ return;
+}
+
+/*
+ * If you change this make sure you make the corresponding change
+ * to autofs-dev-ioctl.c:lookup_ioctl()
+ */
+enum {
+ /* Get various version info */
+ AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
+ AUTOFS_DEV_IOCTL_PROTOVER_CMD,
+ AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
+
+ /* Open mount ioctl fd */
+ AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
+
+ /* Close mount ioctl fd */
+ AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
+
+ /* Mount/expire status returns */
+ AUTOFS_DEV_IOCTL_READY_CMD,
+ AUTOFS_DEV_IOCTL_FAIL_CMD,
+
+ /* Activate/deactivate autofs mount */
+ AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
+ AUTOFS_DEV_IOCTL_CATATONIC_CMD,
+
+ /* Expiry timeout */
+ AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
+
+ /* Get mount last requesting uid and gid */
+ AUTOFS_DEV_IOCTL_REQUESTER_CMD,
+
+ /* Check for eligible expire candidates */
+ AUTOFS_DEV_IOCTL_EXPIRE_CMD,
+
+ /* Request busy status */
+ AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
+
+ /* Check if path is a mountpoint */
+ AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
+};
+
+#define AUTOFS_IOCTL 0x93
+
+#define AUTOFS_DEV_IOCTL_VERSION \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_PROTOVER \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_OPENMOUNT \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_READY \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_FAIL \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_SETPIPEFD \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_CATATONIC \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_TIMEOUT \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_REQUESTER \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_EXPIRE \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
+ _IOWR(AUTOFS_IOCTL, \
+ AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
+
+#endif /* _LINUX_AUTO_DEV_IOCTL_H */
{ "KillMode", config_parse_kill_mode, &u->mount.kill_mode, "Mount" },
EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
+ { "Where", config_parse_path, &u->automount.where, "Automount" },
+
{ NULL, NULL, NULL, NULL }
};
m->confirm_spawn = confirm_spawn;
m->name_data_slot = -1;
- m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1;
+ m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
char **sysvinit_path;
char **sysvrcnd_path;
+ usec_t boot_timestamp;
+
/* Data specific to the device subsystem */
struct udev* udev;
struct udev_monitor* udev_monitor;
char *cgroup_controller;
char *cgroup_hierarchy;
- usec_t boot_timestamp;
+ /* Data specific to the Automount subsystem */
+ int dev_autofs_fd;
};
int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **m);
return false;
}
-static int is_mount_point(const char *t) {
- struct stat a, b;
- char *copy;
-
- if (lstat(t, &a) < 0) {
-
- if (errno == ENOENT)
- return 0;
-
- return -errno;
- }
-
- if (!(copy = strdup(t)))
- return -ENOMEM;
-
- if (lstat(dirname(copy), &b) < 0) {
- free(copy);
- return -errno;
- }
-
- free(copy);
-
- return a.st_dev != b.st_dev;
-}
-
static int mount_one(const MountPoint *p) {
int r;
assert(p);
- if ((r = is_mount_point(p->where)) < 0)
+ if ((r = path_is_mount_point(p->where)) < 0)
return r;
if (r > 0)
[MOUNT_MAINTAINANCE] = "maintainance"
};
+static char *mount_name_from_where(const char *where) {
+ assert(where);
+
+ if (streq(where, "/"))
+ return strdup("-.mount");
+
+ return unit_name_build_escape(where+1, NULL, ".mount");
+}
+
static void service_unwatch_control_pid(Mount *m) {
assert(m);
assert(u);
assert(u->meta.load_state == UNIT_STUB);
- m->state = 0;
- m->from_etc_fstab = false;
- m->from_proc_self_mountinfo = false;
- m->from_fragment = false;
+ m->timeout_usec = DEFAULT_TIMEOUT_USEC;
+ exec_context_init(&m->exec_context);
- m->is_mounted = false;
- m->just_mounted = false;
- m->just_changed = false;
+ /* We need to make sure that /bin/mount is always called in
+ * the same process group as us, so that the autofs kernel
+ * side doesn't send us another mount request while we are
+ * already trying to comply its last one. */
+ m->exec_context.no_setsid = true;
- m->timeout_usec = DEFAULT_TIMEOUT_USEC;
+ m->timer_watch.type = WATCH_INVALID;
+}
- zero(m->exec_command);
- exec_context_init(&m->exec_context);
+static int mount_notify_automount(Mount *m, int status) {
+ Unit *p;
+ char *k;
- m->kill_mode = 0;
+ assert(m);
- m->control_pid = 0;
- m->failure = false;
+ if (!(k = unit_name_change_suffix(UNIT(m)->meta.id, ".automount")))
+ return -ENOMEM;
- m->timer_watch.type = WATCH_INVALID;
+ p = manager_get_unit(UNIT(m)->meta.manager, k);
+ free(k);
+
+ if (!p)
+ return 0;
+
+ return automount_send_ready(AUTOMOUNT(p), status);
}
static int mount_add_node_links(Mount *m) {
return unit_add_dependency(UNIT(m), UNIT_BEFORE, u);
}
+static int mount_verify(Mount *m) {
+ bool b;
+ char *e;
+ assert(m);
+
+ if (UNIT(m)->meta.load_state != UNIT_LOADED)
+ return 0;
+
+ if (!m->where) {
+ log_error("%s lacks Where setting. Refusing.", UNIT(m)->meta.id);
+ return -EINVAL;
+ }
+
+ path_kill_slashes(m->where);
+
+ if (!(e = mount_name_from_where(m->where)))
+ return -ENOMEM;
+
+ b = unit_has_name(UNIT(m), e);
+ free(e);
+
+ if (!b) {
+ log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int mount_load(Unit *u) {
Mount *m = MOUNT(u);
int r;
return r;
}
- return 0;
+ return mount_verify(m);
}
static void mount_set_state(Mount *m, MountState state) {
m->control_command = NULL;
}
+ if (state == MOUNT_MOUNTED ||
+ state == MOUNT_REMOUNTING)
+ mount_notify_automount(m, 0);
+ else if (state == MOUNT_DEAD ||
+ state == MOUNT_UNMOUNTING ||
+ state == MOUNT_MOUNTING_SIGTERM ||
+ state == MOUNT_MOUNTING_SIGKILL ||
+ state == MOUNT_REMOUNTING_SIGTERM ||
+ state == MOUNT_REMOUNTING_SIGKILL ||
+ state == MOUNT_UNMOUNTING_SIGTERM ||
+ state == MOUNT_UNMOUNTING_SIGKILL ||
+ state == MOUNT_MAINTAINANCE)
+ mount_notify_automount(m, -ENODEV);
+
if (state != old_state)
log_debug("%s changed %s → %s", UNIT(m)->meta.id, state_string_table[old_state], state_string_table[state]);
mount_enter_mounted(m, false);
}
-static void mount_enter_mounting(Mount *m, bool success) {
+static void mount_enter_mounting(Mount *m) {
ExecCommand *c;
int r;
assert(m);
- if (!success)
- m->failure = true;
-
m->control_command = c = m->exec_command + MOUNT_EXEC_MOUNT;
if (m->from_fragment)
m->parameters_fragment.what,
m->where,
"-t", m->parameters_fragment.fstype,
- "-o", m->parameters_fragment.options,
+ m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
NULL);
else if (m->from_etc_fstab)
r = exec_command_set(
mount_enter_dead(m, false);
}
-static void mount_enter_mounting_done(Mount *m, bool success) {
+static void mount_enter_mounting_done(Mount *m) {
assert(m);
- if (!success)
- m->failure = true;
-
mount_set_state(m, MOUNT_MOUNTING_DONE);
}
m->failure = false;
- mount_enter_mounting(m, true);
+ mount_enter_mounting(m);
return 0;
}
if (mount_point_is_api(where))
return 0;
+ if (streq(fstype, "autofs"))
+ return 0;
+
/* probably some kind of swap, which we don't cover for now */
if (where[0] != '/')
return 0;
- if (streq(where, "/"))
- e = strdup("-.mount");
- else
- e = unit_name_build_escape(where+1, NULL, ".mount");
+ e = mount_name_from_where(where);
if (!e)
return -ENOMEM;
break;
case MOUNT_MOUNTING:
- mount_enter_mounting_done(mount, true);
+ mount_enter_mounting_done(mount);
break;
default:
char *e, *slash;
Unit *u;
- if (!(e = unit_name_build_escape(t+1, NULL, ".mount"))) {
+ if (!(e = mount_name_from_where(t))) {
r = -ENOMEM;
goto finish;
}
assert(u);
assert(u->meta.load_state == UNIT_STUB);
- s->type = 0;
- s->restart = 0;
-
s->timeout_usec = DEFAULT_TIMEOUT_USEC;
s->restart_usec = DEFAULT_RESTART_USEC;
-
- exec_context_init(&s->exec_context);
-
s->timer_watch.type = WATCH_INVALID;
-
- s->state = SERVICE_DEAD;
-
s->sysv_start_priority = -1;
- s->permissions_start_only = false;
- s->root_directory_start_only = false;
- s->valid_no_process = false;
- s->kill_mode = 0;
- s->sysv_has_lsb = false;
- s->main_pid = s->control_pid = 0;
- s->main_pid_known = false;
- s->failure = false;
-
s->socket_fd = -1;
- s->bus_name_good = false;
+
+ exec_context_init(&s->exec_context);
RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
}
p = manager_get_unit(UNIT(s)->meta.manager, k);
free(k);
- if (!p) continue;
+ if (!p)
+ continue;
if ((r = set_put(set, p)) < 0)
goto fail;
assert(u);
assert(u->meta.load_state == UNIT_STUB);
- s->state = 0;
s->timer_watch.type = WATCH_INVALID;
- s->bind_ipv6_only = false;
s->backlog = SOMAXCONN;
s->timeout_usec = DEFAULT_TIMEOUT_USEC;
s->directory_mode = 0755;
s->socket_mode = 0666;
- s->kill_mode = 0;
- s->failure = false;
- s->control_pid = 0;
- s->service = NULL;
- s->accept = false;
- s->n_accepted = 0;
+
exec_context_init(&s->exec_context);
}
int cfd = -1;
assert(s);
+ assert(fd >= 0);
log_debug("Incoming traffic on %s", u->meta.id);
if (events != EPOLLIN) {
log_error("Got invalid poll event on socket.");
- socket_enter_stop_pre(s, false);
- return;
+ goto fail;
}
if (w->data.socket_accept) {
continue;
log_error("Failed to accept socket: %m");
- socket_enter_stop_pre(s, false);
- return;
+ goto fail;
}
break;
}
socket_enter_running(s, cfd);
+ return;
+
+fail:
+ socket_enter_stop_pre(s, false);
}
static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
[TARGET_ACTIVE] = "active"
};
-static void target_init(Unit *u) {
- Target *t = TARGET(u);
-
- assert(t);
- assert(u->meta.load_state == UNIT_STUB);
-
- t->state = 0;
-}
-
static void target_dump(Unit *u, FILE *f, const char *prefix) {
Target *t = TARGET(u);
const UnitVTable target_vtable = {
.suffix = ".target",
- .init = target_init,
.load = unit_load_fragment_and_dropin,
.dump = target_dump,
for (; *f; f++) {
if (*f == '/')
- *(t++) = '.';
- else if (*f == '.' || *f == '\\' || !strchr(VALID_CHARS, *f)) {
+ *(t++) = '-';
+ else if (*f == '-' || *f == '\\' || !strchr(VALID_CHARS, *f)) {
*(t++) = '\\';
*(t++) = 'x';
*(t++) = hexchar(*f > 4);
return NULL;
for (t = r; *f; f++) {
- if (*f == '.')
+ if (*f == '-')
*(t++) = '/';
else if (*f == '\\') {
int a, b;
enum UnitType {
UNIT_SERVICE = 0,
- UNIT_TIMER,
UNIT_SOCKET,
UNIT_TARGET,
UNIT_DEVICE,
UNIT_MOUNT,
UNIT_AUTOMOUNT,
+ UNIT_TIMER,
UNIT_SNAPSHOT,
_UNIT_TYPE_MAX,
_UNIT_TYPE_INVALID = -1
#include <stdarg.h>
#include <sys/inotify.h>
#include <sys/poll.h>
+#include <libgen.h>
#include "macro.h"
#include "util.h"
return sigaction(sig, &sa, NULL);
}
+int close_pipe(int p[]) {
+ int a = 0, b = 0;
+
+ assert(p);
+
+ if (p[0] >= 0) {
+ a = close_nointr(p[0]);
+ p[0] = -1;
+ }
+
+ if (p[1] >= 0) {
+ b = close_nointr(p[1]);
+ p[1] = -1;
+ }
+
+ return a < 0 ? a : b;
+}
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes) {
+ uint8_t *p;
+ ssize_t n = 0;
+
+ assert(fd >= 0);
+ assert(buf);
+
+ p = buf;
+
+ while (nbytes > 0) {
+ ssize_t k;
+
+ if ((k = read(fd, p, nbytes)) <= 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ if (errno == EAGAIN) {
+ struct pollfd pollfd;
+
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLIN;
+
+ if (poll(&pollfd, 1, -1) < 0) {
+ if (errno == EINTR)
+ continue;
+
+ return n > 0 ? n : -errno;
+ }
+
+ if (pollfd.revents != POLLIN)
+ return n > 0 ? n : -EIO;
+
+ continue;
+ }
+
+ return n > 0 ? n : (k < 0 ? -errno : 0);
+ }
+
+ p += k;
+ nbytes -= k;
+ n += k;
+ }
+
+ return n;
+}
+
+int path_is_mount_point(const char *t) {
+ struct stat a, b;
+ char *copy;
+
+ if (lstat(t, &a) < 0) {
+
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ if (!(copy = strdup(t)))
+ return -ENOMEM;
+
+ if (lstat(dirname(copy), &b) < 0) {
+ free(copy);
+ return -errno;
+ }
+
+ free(copy);
+
+ return a.st_dev != b.st_dev;
+}
+
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",
int ignore_signal(int sig);
+int close_pipe(int p[]);
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes);
+
+int path_is_mount_point(const char *path);
+
extern char * __progname;
const char *ioprio_class_to_string(int i);
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