[v3,14/15] btrfs-progs: device-add: support HMZONED device
diff mbox series

Message ID 20190820045258.1571640-15-naohiro.aota@wdc.com
State New
Headers show
Series
  • btrfs-progs: zoned block device support
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Commit Message

Naohiro Aota Aug. 20, 2019, 4:52 a.m. UTC
This patch check if the target file system is flagged as HMZONED. If it is,
the device to be added is flagged PREP_DEVICE_HMZONED.  Also add checks to
prevent mixing non-zoned devices and zoned devices.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 cmds/device.c | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/cmds/device.c b/cmds/device.c
index 24158308a41b..9caa77efd049 100644
--- a/cmds/device.c
+++ b/cmds/device.c
@@ -61,6 +61,9 @@  static int cmd_device_add(const struct cmd_struct *cmd,
 	int discard = 1;
 	int force = 0;
 	int last_dev;
+	int res;
+	int hmzoned;
+	struct btrfs_ioctl_feature_flags feature_flags;
 
 	optind = 0;
 	while (1) {
@@ -96,12 +99,35 @@  static int cmd_device_add(const struct cmd_struct *cmd,
 	if (fdmnt < 0)
 		return 1;
 
+	res = ioctl(fdmnt, BTRFS_IOC_GET_FEATURES, &feature_flags);
+	if (res) {
+		error("error getting feature flags '%s': %m", mntpnt);
+		return 1;
+	}
+	hmzoned = feature_flags.incompat_flags & BTRFS_FEATURE_INCOMPAT_HMZONED;
+
 	for (i = optind; i < last_dev; i++){
 		struct btrfs_ioctl_vol_args ioctl_args;
-		int	devfd, res;
+		int	devfd;
 		u64 dev_block_count = 0;
 		char *path;
 
+		if (hmzoned && zoned_model(argv[i]) == ZONED_NONE) {
+			error(
+		"cannot add non-zoned device to HMZONED file system '%s'",
+			      argv[i]);
+			ret++;
+			continue;
+		}
+
+		if (!hmzoned && zoned_model(argv[i]) == ZONED_HOST_MANAGED) {
+			error(
+	"cannot add host managed zoned device to non-HMZONED file system '%s'",
+			      argv[i]);
+			ret++;
+			continue;
+		}
+
 		res = test_dev_for_mkfs(argv[i], force);
 		if (res) {
 			ret++;
@@ -117,7 +143,8 @@  static int cmd_device_add(const struct cmd_struct *cmd,
 
 		res = btrfs_prepare_device(devfd, argv[i], &dev_block_count, 0,
 				PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE |
-				(discard ? PREP_DEVICE_DISCARD : 0));
+				(discard ? PREP_DEVICE_DISCARD : 0) |
+				(hmzoned ? PREP_DEVICE_HMZONED : 0));
 		close(devfd);
 		if (res) {
 			ret++;