/*
* Copyright (C) 2008 Intel Corporation
*
- * mdmon socket / message handling
+ * mdmon socket / message handling
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
return 0;
}
-
int send_message(int fd, struct metadata_update *msg, int tmo)
{
__s32 len = msg->len;
if (rv < 0 || len > MSG_MAX_LEN)
return -1;
if (len > 0) {
- msg->buf = malloc(len);
- if (msg->buf == NULL)
- return -1;
+ msg->buf = xmalloc(len);
rv = recv_buf(fd, msg->buf, len, tmo);
if (rv < 0) {
free(msg->buf);
addr.sun_family = PF_LOCAL;
strcpy(addr.sun_path, path);
- if (connect(sfd, &addr, sizeof(addr)) < 0) {
+ if (connect(sfd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
close(sfd);
return -1;
}
int ping_monitor(char *devname)
{
int sfd = connect_monitor(devname);
- int err = fping_monitor(sfd);
+ int err;
+
+ if (sfd >= 0) {
+ err = fping_monitor(sfd);
+ close(sfd);
+ } else
+ err = -1;
- close(sfd);
return err;
}
return rc;
}
+
+/* check mdmon version if it supports
+ * array blocking mechanism
+ */
+int check_mdmon_version(char *container)
+{
+ char *version = NULL;
+
+ if (!mdmon_running(container)) {
+ /* if mdmon is not active we assume that any instance that is
+ * later started will match the current mdadm version, if this
+ * assumption is violated we may inadvertantly rebuild an array
+ * that was meant for reshape, or start rebuild on a spare that
+ * was to be moved to another container
+ */
+ /* pass */;
+ } else {
+ int ver;
+
+ version = ping_monitor_version(container);
+ ver = version ? mdadm_version(version) : -1;
+ free(version);
+ if (ver < 3002000) {
+ pr_err("mdmon instance for %s cannot be disabled\n",
+ container);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
/**
* block_monitor - prevent mdmon spare assignment
* @container - container to block
*/
int block_monitor(char *container, const int freeze)
{
- int devnum = devname2devnum(container);
struct mdstat_ent *ent, *e, *e2;
struct mdinfo *sra = NULL;
- char *version = NULL;
char buf[64];
int rv = 0;
- if (!mdmon_running(devnum)) {
- /* if mdmon is not active we assume that any instance that is
- * later started will match the current mdadm version, if this
- * assumption is violated we may inadvertantly rebuild an array
- * that was meant for reshape, or start rebuild on a spare that
- * was to be moved to another container
- */
- /* pass */;
- } else {
- int ver;
-
- version = ping_monitor_version(container);
- ver = version ? mdadm_version(version) : -1;
- free(version);
- if (ver < 3002000) {
- fprintf(stderr, Name
- ": mdmon instance for %s cannot be disabled\n",
- container);
- return -1;
- }
- }
+ if (check_mdmon_version(container))
+ return -1;
ent = mdstat_read(0, 0);
if (!ent) {
- fprintf(stderr, Name
- ": failed to read /proc/mdstat while disabling mdmon\n");
+ pr_err("failed to read /proc/mdstat while disabling mdmon\n");
return -1;
}
if (!is_container_member(e, container))
continue;
sysfs_free(sra);
- sra = sysfs_read(-1, e->devnum, GET_VERSION);
+ sra = sysfs_read(-1, e->devnm, GET_VERSION);
if (!sra) {
- fprintf(stderr, Name
- ": failed to read sysfs for subarray%s\n",
- to_subarray(e, container));
+ pr_err("failed to read sysfs for subarray%s\n",
+ to_subarray(e, container));
break;
}
/* can't reshape an array that we can't monitor */
* or part-spares
*/
sysfs_free(sra);
- sra = sysfs_read(-1, e->devnum, GET_DEVS | GET_STATE);
+ sra = sysfs_read(-1, e->devnm, GET_DEVS | GET_STATE);
if (sra && sra->array.spare_disks > 0) {
unblock_subarray(sra, freeze);
break;
}
if (e) {
- fprintf(stderr, Name ": failed to freeze subarray%s\n",
+ pr_err("failed to freeze subarray%s\n",
to_subarray(e, container));
/* thaw the partially frozen container */
if (!is_container_member(e2, container))
continue;
sysfs_free(sra);
- sra = sysfs_read(-1, e2->devnum, GET_VERSION);
+ sra = sysfs_read(-1, e2->devnm, GET_VERSION);
if (unblock_subarray(sra, freeze))
- fprintf(stderr, Name ": Failed to unfreeze %s\n", e2->dev);
+ pr_err("Failed to unfreeze %s\n", e2->devnm);
}
ping_monitor(container); /* cleared frozen */
ent = mdstat_read(0, 0);
if (!ent) {
- fprintf(stderr, Name
- ": failed to read /proc/mdstat while unblocking container\n");
+ pr_err("failed to read /proc/mdstat while unblocking container\n");
return;
}
if (!is_container_member(e, container))
continue;
sysfs_free(sra);
- sra = sysfs_read(-1, e->devnum, GET_VERSION|GET_LEVEL);
+ sra = sysfs_read(-1, e->devnm, GET_VERSION|GET_LEVEL);
+ if (!sra)
+ continue;
if (sra->array.level > 0)
to_ping++;
if (unblock_subarray(sra, unfreeze))
- fprintf(stderr, Name ": Failed to unfreeze %s\n", e->dev);
+ pr_err("Failed to unfreeze %s\n", e->devnm);
}
if (to_ping)
ping_monitor(container);
free_mdstat(ent);
}
-
-
/* give the manager a chance to view the updated container state. This
* would naturally happen due to the manager noticing a change in
* /proc/mdstat; however, pinging encourages this detection to happen
close(sfd);
return err;
}
+
+/* using takeover operation for grow purposes, mdadm has to be sure
+ * that mdmon processes all updates, and if necessary it will be closed
+ * at takeover to raid0 operation
+ */
+void flush_mdmon(char *container)
+{
+ ping_manager(container);
+ ping_monitor(container);
+}
projects / thirdparty / mdadm.git / blobdiff