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Subject[PATCH] Tools: hv: use full nlmsghdr in netlink_send
Date
There is no need to have a nlmsghdr pointer to another temporary buffer.
Instead use a full struct nlmsghdr.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
---
tools/hv/hv_kvp_daemon.c | 15 +++++----------
tools/hv/hv_vss_daemon.c | 15 +++++----------
2 files changed, 10 insertions(+), 20 deletions(-)

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index 1bd1ad1..7c05f55 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -1393,23 +1393,18 @@ kvp_get_domain_name(char *buffer, int length)
static int
netlink_send(int fd, struct cn_msg *msg)
{
- struct nlmsghdr *nlh;
+ struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE };
unsigned int size;
struct msghdr message;
- char buffer[64];
struct iovec iov[2];

size = sizeof(struct cn_msg) + msg->len;

- nlh = (struct nlmsghdr *)buffer;
- nlh->nlmsg_seq = 0;
- nlh->nlmsg_pid = getpid();
- nlh->nlmsg_type = NLMSG_DONE;
- nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
- nlh->nlmsg_flags = 0;
+ nlh.nlmsg_pid = getpid();
+ nlh.nlmsg_len = NLMSG_LENGTH(size);

- iov[0].iov_base = nlh;
- iov[0].iov_len = sizeof(*nlh);
+ iov[0].iov_base = &nlh;
+ iov[0].iov_len = sizeof(nlh);

iov[1].iov_base = msg;
iov[1].iov_len = size;
diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
index 2f1f53f..8ac0ee7 100644
--- a/tools/hv/hv_vss_daemon.c
+++ b/tools/hv/hv_vss_daemon.c
@@ -105,23 +105,18 @@ static int vss_operate(int operation)

static int netlink_send(int fd, struct cn_msg *msg)
{
- struct nlmsghdr *nlh;
+ struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE };
unsigned int size;
struct msghdr message;
- char buffer[64];
struct iovec iov[2];

size = sizeof(struct cn_msg) + msg->len;

- nlh = (struct nlmsghdr *)buffer;
- nlh->nlmsg_seq = 0;
- nlh->nlmsg_pid = getpid();
- nlh->nlmsg_type = NLMSG_DONE;
- nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
- nlh->nlmsg_flags = 0;
+ nlh.nlmsg_pid = getpid();
+ nlh.nlmsg_len = NLMSG_LENGTH(size);

- iov[0].iov_base = nlh;
- iov[0].iov_len = sizeof(*nlh);
+ iov[0].iov_base = &nlh;
+ iov[0].iov_len = sizeof(nlh);

iov[1].iov_base = msg;
iov[1].iov_len = size;

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