X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=sysfs.c;h=d28e21a251eba7851a27c6ba96a97f9795e10259;hp=18f3df9a6ec3b5f4eff12011e0f585d265c7d290;hb=36138e4e4b6c3f9db21e65ac8962bf22d4b2c274;hpb=7a862a020f04b10f17f6dcae23bf60c52cbe190b

diff --git a/sysfs.c b/sysfs.c
index 18f3df9a..d28e21a2 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -27,15 +27,15 @@
 #include	<dirent.h>
 #include	<ctype.h>
 
-int load_sys(char *path, char *buf)
+int load_sys(char *path, char *buf, int len)
 {
 	int fd = open(path, O_RDONLY);
 	int n;
 	if (fd < 0)
 		return -1;
-	n = read(fd, buf, 1024);
+	n = read(fd, buf, len);
 	close(fd);
-	if (n <0 || n >= 1024)
+	if (n <0 || n >= len)
 		return -1;
 	buf[n] = 0;
 	if (n && buf[n-1] == '\n')
@@ -74,6 +74,12 @@ int sysfs_open(char *devnm, char *devname, char *attr)
 	return fd;
 }
 
+void sysfs_init_dev(struct mdinfo *mdi, unsigned long devid)
+{
+	snprintf(mdi->sys_name,
+		 sizeof(mdi->sys_name), "dev-%s", devid2kname(devid));
+}
+
 void sysfs_init(struct mdinfo *mdi, int fd, char *devnm)
 {
 	mdi->sys_name[0] = 0;
@@ -112,7 +118,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 	sra->devs = NULL;
 	if (options & GET_VERSION) {
 		strcpy(base, "metadata_version");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		if (strncmp(buf, "none", 4) == 0) {
 			sra->array.major_version =
@@ -131,31 +137,31 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 	}
 	if (options & GET_LEVEL) {
 		strcpy(base, "level");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->array.level = map_name(pers, buf);
 	}
 	if (options & GET_LAYOUT) {
 		strcpy(base, "layout");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->array.layout = strtoul(buf, NULL, 0);
 	}
 	if (options & GET_DISKS) {
 		strcpy(base, "raid_disks");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->array.raid_disks = strtoul(buf, NULL, 0);
 	}
 	if (options & GET_DEGRADED) {
 		strcpy(base, "degraded");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->array.failed_disks = strtoul(buf, NULL, 0);
 	}
 	if (options & GET_COMPONENT) {
 		strcpy(base, "component_size");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->component_size = strtoull(buf, NULL, 0);
 		/* sysfs reports "K", but we want sectors */
@@ -163,13 +169,13 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 	}
 	if (options & GET_CHUNK) {
 		strcpy(base, "chunk_size");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->array.chunk_size = strtoul(buf, NULL, 0);
 	}
 	if (options & GET_CACHE) {
 		strcpy(base, "stripe_cache_size");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			/* Probably level doesn't support it */
 			sra->cache_size = 0;
 		else
@@ -177,7 +183,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 	}
 	if (options & GET_MISMATCH) {
 		strcpy(base, "mismatch_cnt");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		sra->mismatch_cnt = strtoul(buf, NULL, 0);
 	}
@@ -189,7 +195,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 		size_t len;
 
 		strcpy(base, "safe_mode_delay");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 
 		/* remove a period, and count digits after it */
@@ -212,7 +218,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 	}
 	if (options & GET_BITMAP_LOCATION) {
 		strcpy(base, "bitmap/location");
-		if (load_sys(fname, buf))
+		if (load_sys(fname, buf, sizeof(buf)))
 			goto abort;
 		if (strncmp(buf, "file", 4) == 0)
 			sra->bitmap_offset = 1;
@@ -224,6 +230,14 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 			goto abort;
 	}
 
+	if (options & GET_ARRAY_STATE) {
+		strcpy(base, "array_state");
+		if (load_sys(fname, sra->sysfs_array_state,
+			     sizeof(sra->sysfs_array_state)))
+			goto abort;
+	} else
+		sra->sysfs_array_state[0] = 0;
+
 	if (! (options & GET_DEVS))
 		return sra;
 
@@ -249,7 +263,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 
 		/* Always get slot, major, minor */
 		strcpy(dbase, "slot");
-		if (load_sys(fname, buf)) {
+		if (load_sys(fname, buf, sizeof(buf))) {
 			/* hmm... unable to read 'slot' maybe the device
 			 * is going away?
 			 */
@@ -274,7 +288,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 		if (*ep) dev->disk.raid_disk = -1;
 
 		strcpy(dbase, "block/dev");
-		if (load_sys(fname, buf)) {
+		if (load_sys(fname, buf, sizeof(buf))) {
 			/* assume this is a stale reference to a hot
 			 * removed device
 			 */
@@ -286,7 +300,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 
 		/* special case check for block devices that can go 'offline' */
 		strcpy(dbase, "block/device/state");
-		if (load_sys(fname, buf) == 0 &&
+		if (load_sys(fname, buf, sizeof(buf)) == 0 &&
 		    strncmp(buf, "offline", 7) == 0) {
 			free(dev);
 			continue;
@@ -299,25 +313,25 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 
 		if (options & GET_OFFSET) {
 			strcpy(dbase, "offset");
-			if (load_sys(fname, buf))
+			if (load_sys(fname, buf, sizeof(buf)))
 				goto abort;
 			dev->data_offset = strtoull(buf, NULL, 0);
 			strcpy(dbase, "new_offset");
-			if (load_sys(fname, buf) == 0)
+			if (load_sys(fname, buf, sizeof(buf)) == 0)
 				dev->new_data_offset = strtoull(buf, NULL, 0);
 			else
 				dev->new_data_offset = dev->data_offset;
 		}
 		if (options & GET_SIZE) {
 			strcpy(dbase, "size");
-			if (load_sys(fname, buf))
+			if (load_sys(fname, buf, sizeof(buf)))
 				goto abort;
 			dev->component_size = strtoull(buf, NULL, 0) * 2;
 		}
 		if (options & GET_STATE) {
 			dev->disk.state = 0;
 			strcpy(dbase, "state");
-			if (load_sys(fname, buf))
+			if (load_sys(fname, buf, sizeof(buf)))
 				goto abort;
 			if (strstr(buf, "in_sync"))
 				dev->disk.state |= (1<<MD_DISK_SYNC);
@@ -328,7 +342,7 @@ struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options)
 		}
 		if (options & GET_ERROR) {
 			strcpy(buf, "errors");
-			if (load_sys(fname, buf))
+			if (load_sys(fname, buf, sizeof(buf)))
 				goto abort;
 			dev->errors = strtoul(buf, NULL, 0);
 		}
@@ -380,7 +394,8 @@ unsigned long long get_component_size(int fd)
 	struct stat stb;
 	char fname[50];
 	int n;
-	if (fstat(fd, &stb)) return 0;
+	if (fstat(fd, &stb))
+		return 0;
 	if (major(stb.st_rdev) != (unsigned)get_mdp_major())
 		sprintf(fname, "/sys/block/md%d/md/component_size",
 			(int)minor(stb.st_rdev));
@@ -490,7 +505,7 @@ int sysfs_fd_get_ll(int fd, unsigned long long *val)
 
 	lseek(fd, 0, 0);
 	n = read(fd, buf, sizeof(buf));
-	if (n <= 0)
+	if (n <= 0 || n == sizeof(buf))
 		return -2;
 	buf[n] = 0;
 	*val = strtoull(buf, &ep, 0);
@@ -526,7 +541,7 @@ int sysfs_fd_get_two(int fd, unsigned long long *v1, unsigned long long *v2)
 
 	lseek(fd, 0, 0);
 	n = read(fd, buf, sizeof(buf));
-	if (n <= 0)
+	if (n <= 0 || n == sizeof(buf))
 		return -2;
 	buf[n] = 0;
 	*v1 = strtoull(buf, &ep, 0);
@@ -562,7 +577,7 @@ int sysfs_fd_get_str(int fd, char *val, int size)
 
 	lseek(fd, 0, 0);
 	n = read(fd, val, size);
-	if (n <= 0)
+	if (n <= 0 || n == size)
 		return -1;
 	val[n] = 0;
 	return n;
@@ -715,7 +730,7 @@ int sysfs_disk_to_sg(int fd)
 	struct stat st;
 	char path[256];
 	char sg_path[256];
-	char sg_major_minor[8];
+	char sg_major_minor[10];
 	char *c;
 	DIR *dir;
 	struct dirent *de;
@@ -750,7 +765,7 @@ int sysfs_disk_to_sg(int fd)
 
 	rv = read(fd, sg_major_minor, sizeof(sg_major_minor));
 	close(fd);
-	if (rv < 0)
+	if (rv < 0 || rv == sizeof(sg_major_minor))
 		return -1;
 	else
 		sg_major_minor[rv - 1] = '\0';