If the device is setup with ioctl we can resize the device after the
initial setup, but if the device is setup with netlink we cannot use the
resize related ioctls and there is no netlink reconfigure size ATTR
handling code.
This patch adds netlink reconfigure resize support to match the ioctl
interface.
Signed-off-by: Mike Christie <mchristi@xxxxxxxxxx>
---
drivers/block/nbd.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 053958a8a2ba..68b9d4b2d1be 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1939,6 +1939,15 @@ static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
goto out;
}
+ if (info->attrs[NBD_ATTR_SIZE_BYTES]) {
+ u64 bytes = nla_get_u64(info->attrs[NBD_ATTR_SIZE_BYTES]);
+ nbd_size_set(nbd, config->blksize,
+ div64_u64(bytes, config->blksize));
+ }
+ if (info->attrs[NBD_ATTR_BLOCK_SIZE_BYTES]) {
+ u64 bsize = nla_get_u64(info->attrs[NBD_ATTR_BLOCK_SIZE_BYTES]);
+ nbd_size_set(nbd, bsize, div64_u64(config->bytesize, bsize));
+ }
if (info->attrs[NBD_ATTR_TIMEOUT]) {
u64 timeout = nla_get_u64(info->attrs[NBD_ATTR_TIMEOUT]);
nbd->tag_set.timeout = timeout * HZ;
--
2.21.0
