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Subject[PATCH 12/12] btrfs-progs: introduce support for dev-place HMZONED device
Date
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-replace.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/cmds-replace.c b/cmds-replace.c
index 713d200938d4..c752ceaadb77 100644
--- a/cmds-replace.c
+++ b/cmds-replace.c
@@ -116,6 +116,7 @@ static const char *const cmd_replace_start_usage[] = {

static int cmd_replace_start(int argc, char **argv)
{
+ struct btrfs_ioctl_feature_flags feature_flags;
struct btrfs_ioctl_dev_replace_args start_args = {0};
struct btrfs_ioctl_dev_replace_args status_args = {0};
int ret;
@@ -123,6 +124,7 @@ static int cmd_replace_start(int argc, char **argv)
int c;
int fdmnt = -1;
int fddstdev = -1;
+ int hmzoned;
char *path;
char *srcdev;
char *dstdev = NULL;
@@ -163,6 +165,13 @@ static int cmd_replace_start(int argc, char **argv)
if (fdmnt < 0)
goto leave_with_error;

+ ret = ioctl(fdmnt, BTRFS_IOC_GET_FEATURES, &feature_flags);
+ if (ret) {
+ error("ioctl(GET_FEATURES) on '%s' returns error: %m", path);
+ goto leave_with_error;
+ }
+ hmzoned = feature_flags.incompat_flags & BTRFS_FEATURE_INCOMPAT_HMZONED;
+
/* check for possible errors before backgrounding */
status_args.cmd = BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS;
status_args.result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT;
@@ -257,7 +266,8 @@ static int cmd_replace_start(int argc, char **argv)
strncpy((char *)start_args.start.tgtdev_name, dstdev,
BTRFS_DEVICE_PATH_NAME_MAX);
ret = btrfs_prepare_device(fddstdev, dstdev, &dstdev_block_count, 0,
- PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE);
+ PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE |
+ (hmzoned ? PREP_DEVICE_HMZONED | PREP_DEVICE_DISCARD : 0));
if (ret)
goto leave_with_error;

--
2.21.0
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