util: Introduce md_get_disk_info()

This removes all the inline ioctl calls for GET_DISK_INFO, allowing us
to switch to sysfs in one place, and improves type checking.

Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>

7 files changed, 31 insertions, 25 deletions

diff --git a/Detail.c b/Detail.c
index d7e886a7..fa6d4c77 100644
--- a/Detail.c
+++ b/Detail.c
@@ -51,10 +51,8 @@ static int add_device(const char *dev, char ***p_devices,
 int Detail(char *dev, struct context *c)
 {
 	/*
-	 * Print out details for an md array by using
-	 * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
+	 * Print out details for an md array
 	 */
-
 	int fd = open(dev, O_RDONLY);
 	int vers;
 	mdu_array_info_t array;
@@ -165,7 +163,7 @@ int Detail(char *dev, struct context *c)
 			disk = subdev->disk;
 		else {
 			disk.number = d;
-			if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+			if (md_get_disk_info(fd, &disk) < 0)
 				continue;
 			if (d >= array.raid_disks &&
 			    disk.major == 0 &&
@@ -322,7 +320,7 @@ int Detail(char *dev, struct context *c)
 	} else for (d = 0; d < max_disks; d++) {
 		mdu_disk_info_t disk;
 		disk.number = d;
-		if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
+		if (md_get_disk_info(fd, &disk) < 0) {
 			if (d < array.raid_disks)
 				pr_err("cannot get device detail for device %d: %s\n",
 					d, strerror(errno));
diff --git a/Grow.c b/Grow.c
index 4eab5ccc..1c90902c 100755
--- a/Grow.c
+++ b/Grow.c
@@ -161,7 +161,7 @@ int Grow_Add_device(char *devname, int fd, char *newdev)
 		st->ss->free_super(st);
 
 		disk.number = d;
-		if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
+		if (md_get_disk_info(fd, &disk) < 0) {
 			pr_err("cannot get device detail for device %d\n",
 				d);
 			close(nfd);
@@ -232,7 +232,7 @@ int Grow_Add_device(char *devname, int fd, char *newdev)
 		char *dv;
 
 		disk.number = d;
-		if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
+		if (md_get_disk_info(fd, &disk) < 0) {
 			pr_err("cannot get device detail for device %d\n",
 				d);
 			return 1;
@@ -422,7 +422,7 @@ int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s)
 			int fd2;
 
 			disk.number = d;
-			if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+			if (md_get_disk_info(fd, &disk) < 0)
 				continue;
 			if (disk.major == 0 && disk.minor == 0)
 				continue;
@@ -483,7 +483,7 @@ int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s)
 			char *dv;
 			int fd2;
 			disk.number = d;
-			if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+			if (md_get_disk_info(fd, &disk) < 0)
 				continue;
 			if ((disk.major==0 && disk.minor == 0) ||
 			    (disk.state & (1 << MD_DISK_REMOVED)))
@@ -2908,7 +2908,7 @@ static int impose_level(int fd, int level, char *devname, int verbose)
 		     d++) {
 			mdu_disk_info_t disk;
 			disk.number = d;
-			if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+			if (md_get_disk_info(fd, &disk) < 0)
 				continue;
 			if (disk.major == 0 && disk.minor == 0)
 				continue;
@@ -2927,7 +2927,7 @@ static int impose_level(int fd, int level, char *devname, int verbose)
 		     d++) {
 			mdu_disk_info_t disk;
 			disk.number = d;
-			if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+			if (md_get_disk_info(fd, &disk) < 0)
 				continue;
 			if (disk.major == 0 && disk.minor == 0)
 				continue;
@@ -5011,7 +5011,7 @@ int Grow_continue_command(char *devname, int fd,
 				char *dv;
 				int err;
 				disk.number = d;
-				if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
+				if (md_get_disk_info(fd, &disk) < 0)
 					continue;
 				if (disk.major == 0 && disk.minor == 0)
 					continue;
diff --git a/Manage.c b/Manage.c
index 24ed3705..0ffb6c68 100644
--- a/Manage.c
+++ b/Manage.c
@@ -546,7 +546,7 @@ static void add_faulty(struct mddev_dev *dv, int fd, char disp)
 	for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) {
 		char buf[40];
 		disk.number = i;
-		if (ioctl(fd, GET_DISK_INFO, &disk) != 0)
+		if (md_get_disk_info(fd, &disk) != 0)
 			continue;
 		if (disk.major == 0 && disk.minor == 0)
 			continue;
@@ -573,7 +573,7 @@ static void add_detached(struct mddev_dev *dv, int fd, char disp)
 		char buf[40];
 		int sfd;
 		disk.number = i;
-		if (ioctl(fd, GET_DISK_INFO, &disk) != 0)
+		if (md_get_disk_info(fd, &disk) != 0)
 			continue;
 		if (disk.major == 0 && disk.minor == 0)
 			continue;
@@ -615,7 +615,7 @@ static void add_set(struct mddev_dev *dv, int fd, char set_char)
 	for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) {
 		char buf[40];
 		disk.number = i;
-		if (ioctl(fd, GET_DISK_INFO, &disk) != 0)
+		if (md_get_disk_info(fd, &disk) != 0)
 			continue;
 		if (disk.major == 0 && disk.minor == 0)
 			continue;
@@ -661,9 +661,8 @@ int attempt_re_add(int fd, int tfd, struct mddev_dev *dv,
 		    get_linux_version() <= 2006018)
 			goto skip_re_add;
 		disc.number = mdi.disk.number;
-		if (ioctl(fd, GET_DISK_INFO, &disc) != 0
-		    || disc.major != 0 || disc.minor != 0
-			)
+		if (md_get_disk_info(fd, &disc) != 0 ||
+		    disc.major != 0 || disc.minor != 0)
 			goto skip_re_add;
 		disc.major = major(rdev);
 		disc.minor = minor(rdev);
@@ -805,7 +804,7 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv,
 				char *dev;
 				int dfd;
 				disc.number = j;
-				if (ioctl(fd, GET_DISK_INFO, &disc))
+				if (md_get_disk_info(fd, &disc))
 					continue;
 				if (disc.major==0 && disc.minor==0)
 					continue;
@@ -888,7 +887,7 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv,
 
 			for (d = 0; d < MAX_DISKS && found < array->nr_disks; d++) {
 				disc.number = d;
-				if (ioctl(fd, GET_DISK_INFO, &disc))
+				if (md_get_disk_info(fd, &disc))
 					continue;
 				if (disc.major == 0 && disc.minor == 0)
 					continue;
@@ -929,7 +928,7 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv,
 	 */
 	for (j = array->raid_disks; j < tst->max_devs; j++) {
 		disc.number = j;
-		if (ioctl(fd, GET_DISK_INFO, &disc))
+		if (md_get_disk_info(fd, &disc))
 			break;
 		if (disc.major==0 && disc.minor==0)
 			break;
@@ -994,7 +993,7 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv,
 		for (j = 0; j < tst->max_devs; j++) {
 			mdu_disk_info_t disc2;
 			disc2.number = j;
-			if (ioctl(fd, GET_DISK_INFO, &disc2))
+			if (md_get_disk_info(fd, &disc2))
 				continue;
 			if (disc2.major==0 && disc2.minor==0)
 				continue;
diff --git a/Monitor.c b/Monitor.c
index 0a0a1e27..2c0f717c 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -608,7 +608,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
 	     i++) {
 		mdu_disk_info_t disc;
 		disc.number = i;
-		if (ioctl(fd, GET_DISK_INFO, &disc) >= 0) {
+		if (md_get_disk_info(fd, &disc) >= 0) {
 			info[i].state = disc.state;
 			info[i].major = disc.major;
 			info[i].minor = disc.minor;
diff --git a/Query.c b/Query.c
index cae75d17..a2c839c0 100644
--- a/Query.c
+++ b/Query.c
@@ -102,7 +102,7 @@ int Query(char *dev)
 			if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
 				if (md_get_version(fd) >= 9000 &&
 				    md_get_array_info(fd, &array) >= 0) {
-					if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
+					if (md_get_disk_info(fd, &disc) >= 0 &&
 					    makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
 						activity = "active";
 					else
diff --git a/mdadm.h b/mdadm.h
index 77705856..3ab548fe 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1406,6 +1406,7 @@ extern int Restore_metadata(char *dev, char *dir, struct context *c,
 
 extern int md_get_version(int fd);
 int md_get_array_info(int fd, struct mdu_array_info_s *array);
+int md_get_disk_info(int fd, struct mdu_disk_info_s *disk);
 extern int get_linux_version(void);
 extern int mdadm_version(char *version);
 extern unsigned long long parse_size(char *size);
diff --git a/util.c b/util.c
index 725877d1..aa27e59d 100644
--- a/util.c
+++ b/util.c
@@ -221,6 +221,14 @@ int md_get_array_info(int fd, struct mdu_array_info_s *array)
 }
 
 /*
+ * Get disk info from the kernel.
+ */
+int md_get_disk_info(int fd, struct mdu_disk_info_s *disk)
+{
+	return ioctl(fd, GET_DISK_INFO, disk);
+}
+
+/*
  * Parse a 128 bit uuid in 4 integers
  * format is 32 hexx nibbles with options :.<space> separator
  * If not exactly 32 hex digits are found, return 0
@@ -553,7 +561,7 @@ int enough_fd(int fd)
 	avail = xcalloc(array.raid_disks, 1);
 	for (i = 0; i < MAX_DISKS && array.nr_disks > 0; i++) {
 		disk.number = i;
-		if (ioctl(fd, GET_DISK_INFO, &disk) != 0)
+		if (md_get_disk_info(fd, &disk) != 0)
 			continue;
 		if (disk.major == 0 && disk.minor == 0)
 			continue;