There are couple of variables that are declared at function
beginning but then used solely within a block (either for() loop
or if() statement). And just before their use they are zeroed
explicitly using memset(). Decrease their scope, use struct zero
initializer and drop explicit memset().
Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
src/qemu/qemu_driver.c | 4 +---
src/remote/remote_driver.c | 7 +++----
src/rpc/virnetsshsession.c | 5 ++---
src/util/virnetdevmacvlan.c | 3 +--
src/util/virnetdevtap.c | 6 ++----
src/util/viruuid.c | 4 ++--
tests/virnetsockettest.c | 7 ++-----
tools/virsh-domain-monitor.c | 7 ++-----
8 files changed, 15 insertions(+), 28 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 497923ffee..1d7b78d73b 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17124,7 +17124,6 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
unsigned int privflags G_GNUC_UNUSED)
{
size_t i;
- struct _virDomainInterfaceStats tmp;
if (!virDomainObjIsActive(dom))
return 0;
@@ -17135,12 +17134,11 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
for (i = 0; i < dom->def->nnets; i++) {
virDomainNetDef *net = dom->def->nets[i];
virDomainNetType actualType;
+ struct _virDomainInterfaceStats tmp = { 0 };
if (!net->ifname)
continue;
- memset(&tmp, 0, sizeof(tmp));
-
actualType = virDomainNetGetActualType(net);
virTypedParamListAddString(params, net->ifname, "net.%zu.name", i);
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index 65ec239fb7..d775f65fe2 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -3728,8 +3728,6 @@ remoteAuthSASL(virConnectPtr conn, struct private_data *priv,
remote_auth_sasl_init_ret iret;
remote_auth_sasl_start_args sargs = {0};
remote_auth_sasl_start_ret sret;
- remote_auth_sasl_step_args pargs = {0};
- remote_auth_sasl_step_ret pret;
const char *clientout;
char *serverin = NULL;
size_t clientoutlen, serverinlen;
@@ -3866,6 +3864,9 @@ remoteAuthSASL(virConnectPtr conn, struct private_data *priv,
* Even if the server has completed, the client must *always* do at least one step
* in this loop to verify the server isn't lying about something. Mutual auth */
for (;;) {
+ remote_auth_sasl_step_args pargs = { 0 };
+ remote_auth_sasl_step_ret pret = { 0 };
+
if ((err = virNetSASLSessionClientStep(sasl,
serverin,
serverinlen,
@@ -3893,14 +3894,12 @@ remoteAuthSASL(virConnectPtr conn, struct private_data *priv,
/* Not done, prepare to talk with the server for another iteration */
/* NB, distinction of NULL vs "" is *critical* in SASL */
- memset(&pargs, 0, sizeof(pargs));
pargs.nil = clientout ? 0 : 1;
pargs.data.data_val = (char*)clientout;
pargs.data.data_len = clientoutlen;
VIR_DEBUG("Server step with %zu bytes %p",
clientoutlen, clientout);
- memset(&pret, 0, sizeof(pret));
if (call(conn, priv, 0, REMOTE_PROC_AUTH_SASL_STEP,
(xdrproc_t) xdr_remote_auth_sasl_step_args, (char *) &pargs,
(xdrproc_t) xdr_remote_auth_sasl_step_ret, (char *) &pret) != 0)
diff --git a/src/rpc/virnetsshsession.c b/src/rpc/virnetsshsession.c
index 1df43bb044..98be120a11 100644
--- a/src/rpc/virnetsshsession.c
+++ b/src/rpc/virnetsshsession.c
@@ -271,7 +271,6 @@ virNetSSHCheckHostKey(virNetSSHSession *sess)
size_t keyLength;
char *errmsg;
g_auto(virBuffer) buff = VIR_BUFFER_INITIALIZER;
- virConnectCredential askKey;
struct libssh2_knownhost *knownHostEntry = NULL;
size_t i;
char *hostnameStr = NULL;
@@ -303,6 +302,8 @@ virNetSSHCheckHostKey(virNetSSHSession *sess)
case LIBSSH2_KNOWNHOST_CHECK_NOTFOUND:
/* key was not found, query to add it to database */
if (sess->hostKeyVerify == VIR_NET_SSH_HOSTKEY_VERIFY_NORMAL) {
+ virConnectCredential askKey = { 0 };
+
/* ask to add the key */
if (!sess->cred || !sess->cred->cb) {
virReportError(VIR_ERR_SSH, "%s",
@@ -312,8 +313,6 @@ virNetSSHCheckHostKey(virNetSSHSession *sess)
}
/* prepare data for the callback */
- memset(&askKey, 0, sizeof(virConnectCredential));
-
for (i = 0; i < sess->cred->ncredtype; i++) {
if (sess->cred->credtype[i] == VIR_CRED_ECHOPROMPT)
break;
diff --git a/src/util/virnetdevmacvlan.c b/src/util/virnetdevmacvlan.c
index db5f41bae8..cde9d70eef 100644
--- a/src/util/virnetdevmacvlan.c
+++ b/src/util/virnetdevmacvlan.c
@@ -217,12 +217,11 @@ int
virNetDevMacVLanTapSetup(int *tapfd, size_t tapfdSize, bool vnet_hdr)
{
unsigned int features;
- struct ifreq ifreq;
short new_flags = 0;
size_t i;
for (i = 0; i < tapfdSize; i++) {
- memset(&ifreq, 0, sizeof(ifreq));
+ struct ifreq ifreq = { 0 };
if (ioctl(tapfd[i], TUNGETIFF, &ifreq) < 0) {
virReportSystemError(errno, "%s",
diff --git a/src/util/virnetdevtap.c b/src/util/virnetdevtap.c
index b85b753c96..3e25f18770 100644
--- a/src/util/virnetdevtap.c
+++ b/src/util/virnetdevtap.c
@@ -172,7 +172,6 @@ int virNetDevTapCreate(char **ifname,
unsigned int flags)
{
size_t i = 0;
- struct ifreq ifr;
int rc;
int ret = -1;
int fd = -1;
@@ -204,8 +203,9 @@ int virNetDevTapCreate(char **ifname,
if (!tunpath)
tunpath = "/dev/net/tun";
- memset(&ifr, 0, sizeof(ifr));
for (i = 0; i < tapfdSize; i++) {
+ struct ifreq ifr = { 0 };
+
if ((fd = open(tunpath, O_RDWR)) < 0) {
virReportSystemError(errno,
_("Unable to open %1$s, is tun module loaded?"),
@@ -213,8 +213,6 @@ int virNetDevTapCreate(char **ifname,
goto cleanup;
}
- memset(&ifr, 0, sizeof(ifr));
-
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
/* If tapfdSize is greater than one, request multiqueue */
if (tapfdSize > 1)
diff --git a/src/util/viruuid.c b/src/util/viruuid.c
index ca22c91d48..a4f3a50fa5 100644
--- a/src/util/viruuid.c
+++ b/src/util/viruuid.c
@@ -215,13 +215,13 @@ int
virSetHostUUIDStr(const char *uuid)
{
int rc;
- char dmiuuid[VIR_UUID_STRING_BUFLEN];
if (virUUIDIsValid(host_uuid))
return EEXIST;
if (!uuid) {
- memset(dmiuuid, 0, sizeof(dmiuuid));
+ char dmiuuid[VIR_UUID_STRING_BUFLEN] = { 0 };
+
if (!getDMISystemUUID(dmiuuid, sizeof(dmiuuid))) {
if (!virUUIDParse(dmiuuid, host_uuid))
return 0;
diff --git a/tests/virnetsockettest.c b/tests/virnetsockettest.c
index 2295e29777..0e9cd8a81c 100644
--- a/tests/virnetsockettest.c
+++ b/tests/virnetsockettest.c
@@ -44,8 +44,6 @@ static int
checkProtocols(bool *hasIPv4, bool *hasIPv6,
int *freePort)
{
- struct sockaddr_in in4;
- struct sockaddr_in6 in6;
size_t i;
*freePort = 0;
@@ -53,6 +51,8 @@ checkProtocols(bool *hasIPv4, bool *hasIPv6,
return -1;
for (i = 0; i < 50; i++) {
+ struct sockaddr_in in4 = { 0 };
+ struct sockaddr_in6 in6 = { 0 };
VIR_AUTOCLOSE s4 = -1;
VIR_AUTOCLOSE s6 = -1;
@@ -71,9 +71,6 @@ checkProtocols(bool *hasIPv4, bool *hasIPv6,
return -1;
}
- memset(&in4, 0, sizeof(in4));
- memset(&in6, 0, sizeof(in6));
-
in4.sin_family = AF_INET;
in4.sin_port = htons(BASE_PORT + i);
in4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index ec99b9f99a..c74fc19347 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -444,7 +444,6 @@ cmdDomblkinfoGet(const virDomainBlockInfo *info,
static bool
cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
{
- virDomainBlockInfo info;
g_autoptr(virshDomain) dom = NULL;
bool human = false;
bool all = false;
@@ -491,6 +490,7 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
g_autofree char *cap = NULL;
g_autofree char *alloc = NULL;
g_autofree char *phy = NULL;
+ virDomainBlockInfo info = { 0 };
ctxt->node = disks[i];
protocol = virXPathString("string(./source/@protocol)", ctxt);
@@ -513,10 +513,6 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
return false;
}
}
- } else {
- /* if we don't call virDomainGetBlockInfo() who clears 'info'
- * we have to do it manually */
- memset(&info, 0, sizeof(info));
}
if (!cmdDomblkinfoGet(&info, &cap, &alloc, &phy, human))
@@ -531,6 +527,7 @@ cmdDomblkinfo(vshControl *ctl, const vshCmd *cmd)
g_autofree char *cap = NULL;
g_autofree char *alloc = NULL;
g_autofree char *phy = NULL;
+ virDomainBlockInfo info = { 0 };
if (virDomainGetBlockInfo(dom, device, &info, 0) < 0)
return false;
--
2.41.0
