+/*
+ * mdmon - monitor external metadata arrays
+ *
+ * Copyright (C) 2007-2009 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2007-2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
#include "mdadm.h"
#include "mdmon.h"
return n;
}
-
int get_resync_start(struct active_array *a)
{
char buf[30];
n = read_attr(buf, 30, a->resync_start_fd);
if (n <= 0)
return n;
-
- a->resync_start = strtoull(buf, NULL, 10);
+ if (strncmp(buf, "none", 4) == 0)
+ a->resync_start = ~0ULL;
+ else
+ a->resync_start = strtoull(buf, NULL, 10);
return 1;
}
-static int attr_match(const char *attr, const char *str)
-{
- /* See if attr, read from a sysfs file, matches
- * str. They must either be the same, or attr can
- * have a trailing newline or comma
- */
- while (*attr && *str && *attr == *str) {
- attr++;
- str++;
- }
-
- if (*str || (*attr && *attr != ',' && *attr != '\n'))
- return 0;
- return 1;
-}
-
-static int match_word(const char *word, char **list)
-{
- int n;
- for (n=0; list[n]; n++)
- if (attr_match(word, list[n]))
- break;
- return n;
-}
static enum array_state read_state(int fd)
{
if (n <= 0)
return bad_word;
- return (enum array_state) match_word(buf, array_states);
+ return (enum array_state) sysfs_match_word(buf, array_states);
}
static enum sync_action read_action( int fd)
if (n <= 0)
return bad_action;
- return (enum sync_action) match_word(buf, sync_actions);
+ return (enum sync_action) sysfs_match_word(buf, sync_actions);
}
int read_dev_state(int fd)
cp = buf;
while (cp) {
- if (attr_match(cp, "faulty"))
+ if (sysfs_attr_match(cp, "faulty"))
rv |= DS_FAULTY;
- if (attr_match(cp, "in_sync"))
+ if (sysfs_attr_match(cp, "in_sync"))
rv |= DS_INSYNC;
- if (attr_match(cp, "write_mostly"))
+ if (sysfs_attr_match(cp, "write_mostly"))
rv |= DS_WRITE_MOSTLY;
- if (attr_match(cp, "spare"))
+ if (sysfs_attr_match(cp, "spare"))
rv |= DS_SPARE;
- if (attr_match(cp, "blocked"))
+ if (sysfs_attr_match(cp, "blocked"))
rv |= DS_BLOCKED;
cp = strchr(cp, ',');
if (cp)
int check_degraded = 0;
int deactivate = 0;
struct mdinfo *mdi;
+ int dirty = 0;
a->next_state = bad_word;
a->next_action = bad_action;
get_resync_start(a);
a->container->ss->set_array_state(a, 0);
a->next_state = active;
+ dirty = 1;
}
if (a->curr_state == active_idle) {
- /* Set array to 'clean' FIRST, then
- * a->ss->mark_clean(a, ~0ULL);
- * just ignore for now.
+ /* Set array to 'clean' FIRST, then mark clean
+ * in the metadata
*/
+ a->next_state = clean;
+ dirty = 1;
}
-
+ if (a->curr_state == clean) {
+ get_resync_start(a);
+ a->container->ss->set_array_state(a, 1);
+ }
+ if (a->curr_state == active ||
+ a->curr_state == suspended ||
+ a->curr_state == bad_word)
+ dirty = 1;
if (a->curr_state == readonly) {
- /* Well, I'm ready to handle things, so
- * read-auto is OK. FIXME what if we really want
- * readonly ???
+ /* Well, I'm ready to handle things. If readonly
+ * wasn't requested, transition to read-auto.
*/
- get_resync_start(a);
- if (a->container->ss->set_array_state(a, 2))
- a->next_state = read_auto; /* array is clean */
- else
- a->next_state = active; /* Now active for recovery etc */
+ char buf[64];
+ read_attr(buf, sizeof(buf), a->metadata_fd);
+ if (strncmp(buf, "external:-", 10) == 0) {
+ /* explicit request for readonly array. Leave it alone */
+ ;
+ } else {
+ get_resync_start(a);
+ if (a->container->ss->set_array_state(a, 2))
+ a->next_state = read_auto; /* array is clean */
+ else {
+ a->next_state = active; /* Now active for recovery etc */
+ dirty = 1;
+ }
+ }
}
if (!deactivate &&
* Just check if we need to fiddle spares.
*/
get_resync_start(a);
- a->container->ss->set_array_state(a, 0);
+ a->container->ss->set_array_state(a, a->curr_state <= clean);
check_degraded = 1;
}
}
a->container->ss->sync_metadata(a->container);
- dprintf("%s: update[%d]: (", __func__, a->info.container_member);
+ dprintf("%s(%d): state:%s action:%s next(", __func__, a->info.container_member,
+ array_states[a->curr_state], sync_actions[a->curr_action]);
/* Effect state changes in the array */
if (a->next_state != bad_word) {
}
if (a->next_action != bad_action) {
write_attr(sync_actions[a->next_action], a->action_fd);
- dprintf(" action:%s", array_states[a->next_state]);
+ dprintf(" action:%s", sync_actions[a->next_action]);
}
for (mdi = a->info.devs; mdi ; mdi = mdi->next) {
if (mdi->next_state & DS_UNBLOCK) {
if (deactivate)
a->container = NULL;
- return 1;
+ return dirty;
}
static struct mdinfo *
struct active_array *a, **ap;
int rv;
struct mdinfo *mdi;
+ static unsigned int dirty_arrays = ~0; /* start at some non-zero value */
FD_ZERO(&rfds);
ap = &(*ap)->next;
}
- if (manager_ready && *aap == NULL) {
- /* No interesting arrays. Lets see about exiting.
- * Note that blocking at this point is not a problem
- * as there are no active arrays, there is nothing that
- * we need to be ready to do.
+ if (manager_ready && (*aap == NULL || (sigterm && !dirty_arrays))) {
+ /* No interesting arrays, or we have been told to
+ * terminate and everything is clean. Lets see about
+ * exiting. Note that blocking at this point is not a
+ * problem as there are no active arrays, there is
+ * nothing that we need to be ready to do.
*/
- int fd = open(container->device_name, O_RDONLY|O_EXCL);
+ int fd = open_dev_excl(container->devnum);
if (fd >= 0 || errno != EBUSY) {
/* OK, we are safe to leave */
- dprintf("no arrays to monitor... exiting\n");
+ if (sigterm && !dirty_arrays)
+ dprintf("caught sigterm, all clean... exiting\n");
+ else
+ dprintf("no arrays to monitor... exiting\n");
remove_pidfile(container->devname);
exit_now = 1;
signal_manager();
sigprocmask(SIG_UNBLOCK, NULL, &set);
sigdelset(&set, SIGUSR1);
monitor_loop_cnt |= 1;
- rv = pselect(maxfd+1, &rfds, NULL, NULL, NULL, &set);
+ rv = pselect(maxfd+1, NULL, NULL, &rfds, NULL, &set);
monitor_loop_cnt += 1;
if (rv == -1 && errno == EINTR)
rv = 0;
container->ss->sync_metadata(container);
}
+ rv = 0;
+ dirty_arrays = 0;
for (a = *aap; a ; a = a->next) {
+ int is_dirty;
+
if (a->replaces && !discard_this) {
struct active_array **ap;
for (ap = &a->next; *ap && *ap != a->replaces;
/* FIXME check if device->state_fd need to be cleared?*/
signal_manager();
}
- if (a->container)
- rv += read_and_act(a);
+ if (a->container) {
+ is_dirty = read_and_act(a);
+ rv |= 1;
+ dirty_arrays += is_dirty;
+ /* when terminating stop manipulating the array after it
+ * is clean, but make sure read_and_act() is given a
+ * chance to handle 'active_idle'
+ */
+ if (sigterm && !is_dirty)
+ a->container = NULL; /* stop touching this array */
+ }
}
/* propagate failures across container members */
projects / thirdparty / mdadm.git / blobdiff