X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=mdmon.c;h=5e39437c01b14986f1d9bdd446909700ba175641;hp=5aad763892d0fce60de8e46ca5768f3ecd884406;hb=1124b3cf29dad544e8a5aa01e5f9e94e7be1765a;hpb=6f4098a6fd809acd6ef6a80051eec09f4536a27d

diff --git a/mdmon.c b/mdmon.c
index 5aad7638..5e39437c 100644
--- a/mdmon.c
+++ b/mdmon.c
@@ -271,42 +271,56 @@ static int do_fork(void)
 
 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();
 	}
 
-	if (strncmp(container_name, "md", 2) == 0) {
+	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)
@@ -328,29 +342,45 @@ int main(int argc, char *argv[])
 			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;
@@ -360,7 +390,7 @@ int main(int argc, char *argv[])
 				wait(&status);
 				status = WEXITSTATUS(status);
 			}
-			exit(status);
+			return status;
 		}
 	} else
 		pfd[0] = pfd[1] = -1;
@@ -377,7 +407,7 @@ int main(int argc, char *argv[])
 	}
 
 	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",
@@ -386,20 +416,20 @@ int main(int argc, char *argv[])
 	}
 	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);
 	}
 
@@ -481,9 +511,9 @@ int main(int argc, char *argv[])
 	}
 	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);