+/*
+ * mdmon - monitor external metadata arrays
+ *
+ * Copyright (C) 2007-2008 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2007-2008 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.
+ */
/*
* md array manager.
return 0;
}
-int clone_monitor(struct supertype *container)
+#ifdef __ia64__
+int __clone2(int (*fn)(void *),
+ void *child_stack_base, size_t stack_size,
+ int flags, void *arg, ...
+ /* pid_t *pid, struct user_desc *tls, pid_t *ctid */ );
+#endif
+ int clone_monitor(struct supertype *container)
{
static char stack[4096];
+#ifdef __ia64__
+ mon_tid = __clone2(run_child, stack, sizeof(stack),
+ CLONE_FS|CLONE_FILES|CLONE_VM|CLONE_SIGHAND|CLONE_THREAD,
+ container);
+#else
mon_tid = clone(run_child, stack+4096-64,
CLONE_FS|CLONE_FILES|CLONE_VM|CLONE_SIGHAND|CLONE_THREAD,
container);
+#endif
mgr_tid = syscall(SYS_gettid);
close(fd);
pid = strtoul(buf, NULL, 10);
+ /* first rule of survival... don't off yourself */
+ if (pid == getpid())
+ return;
+
/* kill this process if it is mdmon */
sprintf(buf, "/proc/%lu/cmdline", (unsigned long) pid);
fd = open(buf, O_RDONLY);
for ( ; mdstat; mdstat = mdstat->next)
if (is_container_member(mdstat, devname)) {
sprintf(buf, "/dev/%s", mdstat->dev);
- WaitClean(buf);
+ WaitClean(buf, 0);
}
free_mdstat(mdstat);
remove_pidfile(devname);
static int do_fork(void)
{
#ifdef DEBUG
- if (env_no_mdmon())
+ if (check_env("MDADM_NO_MDMON"))
return 0;
#endif
void usage(void)
{
- fprintf(stderr, "Usage: mdmon [--switch-root dir] /device/name/for/container\n");
+ fprintf(stderr, "Usage: mdmon /device/name/for/container [target_dir]\n");
exit(2);
}
+int mdmon(char *devname, int devnum, int scan, char *switchroot);
+
int main(int argc, char *argv[])
{
- int mdfd;
- struct mdinfo *mdi, *di;
- struct supertype *container;
- sigset_t set;
- struct sigaction act;
- int pfd[2];
- int status;
- int ignore;
char *container_name = NULL;
char *switchroot = NULL;
+ int devnum;
+ char *devname;
+ int scan = 0;
+ int status = 0;
switch (argc) {
+ case 3:
+ switchroot = argv[2];
case 2:
container_name = argv[1];
break;
- case 4:
- if (strcmp(argv[1], "--switch-root") != 0) {
- fprintf(stderr, "mdmon: unknown argument %s\n", argv[1]);
- usage();
- }
- switchroot = argv[2];
- container_name = argv[3];
- break;
default:
usage();
}
- mdfd = open(container_name, O_RDWR);
+ if (strcmp(container_name, "/proc/mdstat") == 0) {
+ struct mdstat_ent *mdstat, *e;
+
+ /* launch an mdmon instance for each container found */
+ scan = 1;
+ mdstat = mdstat_read(0, 0);
+ for (e = mdstat; e; e = e->next) {
+ if (strncmp(e->metadata_version, "external:", 9) == 0 &&
+ !is_subarray(&e->metadata_version[9])) {
+ devname = devnum2devname(e->devnum);
+ /* update cmdline so this mdmon instance can be
+ * distinguished from others in a call to ps(1)
+ */
+ if (strlen(devname) <= strlen(container_name)) {
+ memset(container_name, 0, strlen(container_name));
+ sprintf(container_name, "%s", devname);
+ }
+ status |= mdmon(devname, e->devnum, scan,
+ switchroot);
+ }
+ }
+ free_mdstat(mdstat);
+
+ return status;
+ } else if (strncmp(container_name, "md", 2) == 0) {
+ devnum = devname2devnum(container_name);
+ devname = devnum2devname(devnum);
+ if (strcmp(container_name, devname) != 0)
+ devname = NULL;
+ } else {
+ struct stat st;
+
+ devnum = NoMdDev;
+ if (stat(container_name, &st) == 0)
+ devnum = stat2devnum(&st);
+ if (devnum == NoMdDev)
+ devname = NULL;
+ else
+ devname = devnum2devname(devnum);
+ }
+
+ if (!devname) {
+ fprintf(stderr, "mdmon: %s is not a valid md device name\n",
+ container_name);
+ exit(1);
+ }
+ return mdmon(devname, devnum, scan, switchroot);
+}
+
+int mdmon(char *devname, int devnum, int scan, char *switchroot)
+{
+ int mdfd;
+ struct mdinfo *mdi, *di;
+ struct supertype *container;
+ sigset_t set;
+ struct sigaction act;
+ int pfd[2];
+ int status;
+ int ignore;
+
+ dprintf("starting mdmon for %s in %s\n",
+ devname, switchroot ? : "/");
+ mdfd = open_dev(devnum);
if (mdfd < 0) {
- fprintf(stderr, "mdmon: %s: %s\n", container_name,
+ fprintf(stderr, "mdmon: %s: %s\n", devname,
strerror(errno));
- exit(1);
+ return 1;
}
if (md_get_version(mdfd) < 0) {
fprintf(stderr, "mdmon: %s: Not an md device\n",
- container_name);
- exit(1);
+ devname);
+ return 1;
}
/* Fork, and have the child tell us when they are ready */
- if (do_fork()) {
+ if (do_fork() || scan) {
if (pipe(pfd) != 0) {
fprintf(stderr, "mdmon: failed to create pipe\n");
- exit(1);
+ return 1;
}
switch(fork()) {
case -1:
fprintf(stderr, "mdmon: failed to fork: %s\n",
strerror(errno));
- exit(1);
+ return 1;
case 0: /* child */
close(pfd[0]);
break;
wait(&status);
status = WEXITSTATUS(status);
}
- exit(status);
+ return status;
}
} else
pfd[0] = pfd[1] = -1;
container = malloc(sizeof(*container));
- container->devnum = fd2devnum(mdfd);
- container->devname = devnum2devname(container->devnum);
- container->device_name = container_name;
+ container->devnum = devnum;
+ container->devname = devname;
container->arrays = NULL;
+ container->subarray[0] = 0;
if (!container->devname) {
fprintf(stderr, "mdmon: failed to allocate container name string\n");
}
mdi = sysfs_read(mdfd, container->devnum,
- GET_VERSION|GET_LEVEL|GET_DEVS);
+ GET_VERSION|GET_LEVEL|GET_DEVS|SKIP_GONE_DEVS);
if (!mdi) {
fprintf(stderr, "mdmon: failed to load sysfs info for %s\n",
}
if (mdi->array.level != UnSet) {
fprintf(stderr, "mdmon: %s is not a container - cannot monitor\n",
- container_name);
+ devname);
exit(3);
}
if (mdi->array.major_version != -1 ||
mdi->array.minor_version != -2) {
fprintf(stderr, "mdmon: %s does not use external metadata - cannot monitor\n",
- container_name);
+ devname);
exit(3);
}
container->ss = find_metadata_methods(mdi->text_version);
if (container->ss == NULL) {
fprintf(stderr, "mdmon: %s uses unknown metadata: %s\n",
- container_name, mdi->text_version);
+ devname, mdi->text_version);
exit(3);
}
}
container->sock = make_control_sock(container->devname);
- if (container->ss->load_super(container, mdfd, container_name)) {
+ if (container->ss->load_super(container, mdfd, devname)) {
fprintf(stderr, "mdmon: Cannot load metadata for %s\n",
- container_name);
+ devname);
exit(3);
}
+ close(mdfd);
/* Ok, this is close enough. We can say goodbye to our parent now.
*/
projects / thirdparty / mdadm.git / blobdiff