[libvirt] [PATCH 2/5] API: remote support for VIR_TYPED_PARAM_STRING
Hu Tao
hutao at cn.fujitsu.com
Tue Nov 8 11:00:31 UTC 2011
From: Eric Blake <eblake at redhat.com>
Send and receive string typed parameters across RPC. This also
completes the back-compat mentioned in the previous patch - the
only time we have an older client talking to a newer server is
if RPC is in use, so filtering out strings during RPC prevents
returning an unknown type to the older client.
* src/remote/remote_protocol.x (remote_typed_param_value): Add
another union value.
* daemon/remote.c (remoteDeserializeTypedParameters): Handle
strings on rpc.
(remoteSerializeTypedParameters): Likewise; plus filter out
strings when replying to older clients. Adjust callers.
* src/remote/remote_driver.c (remoteFreeTypedParameters)
(remoteSerializeTypedParameters)
(remoteDeserializeTypedParameters): Handle strings on rpc.
* src/rpc/gendispatch.pl: Properly clean up typed arrays.
* src/remote_protocol-structs: Update.
Based on an initial patch by Hu Tao, with feedback from
Daniel P. Berrange.
Signed-off-by: Eric Blake <eblake at redhat.com>
---
daemon/remote.c | 88 +++++++++++++++++++++++++++++------------
src/remote/remote_driver.c | 28 ++++++++++++-
src/remote/remote_protocol.x | 2 +
src/remote_protocol-structs | 2 +
src/rpc/gendispatch.pl | 3 +-
5 files changed, 94 insertions(+), 29 deletions(-)
diff --git a/daemon/remote.c b/daemon/remote.c
index bd0c3e3..aa3f768 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -92,11 +92,6 @@ static void make_nonnull_secret(remote_nonnull_secret *secret_dst, virSecretPtr
static void make_nonnull_nwfilter(remote_nonnull_nwfilter *net_dst, virNWFilterPtr nwfilter_src);
static void make_nonnull_domain_snapshot(remote_nonnull_domain_snapshot *snapshot_dst, virDomainSnapshotPtr snapshot_src);
-static int
-remoteSerializeTypedParameters(virTypedParameterPtr params,
- int nparams,
- remote_typed_param **ret_params_val,
- u_int *ret_params_len);
static virTypedParameterPtr
remoteDeserializeTypedParameters(remote_typed_param *args_params_val,
u_int args_params_len,
@@ -682,14 +677,17 @@ cleanup:
return rv;
}
-/* Helper to serialize typed parameters. */
+/* Helper to serialize typed parameters. This also filters out any string
+ * parameters that must not be returned to older clients. */
static int
remoteSerializeTypedParameters(virTypedParameterPtr params,
int nparams,
remote_typed_param **ret_params_val,
- u_int *ret_params_len)
+ u_int *ret_params_len,
+ unsigned int flags)
{
int i;
+ int j;
int rv = -1;
remote_typed_param *val;
@@ -699,38 +697,53 @@ remoteSerializeTypedParameters(virTypedParameterPtr params,
goto cleanup;
}
- for (i = 0; i < nparams; ++i) {
+ for (i = 0, j = 0; i < nparams; ++i) {
+ if (!(flags & VIR_TYPED_PARAM_STRING_OKAY) &&
+ params[i].type == VIR_TYPED_PARAM_STRING) {
+ --*ret_params_len;
+ continue;
+ }
+
/* remoteDispatchClientRequest will free this: */
- val[i].field = strdup (params[i].field);
- if (val[i].field == NULL) {
+ val[j].field = strdup(params[i].field);
+ if (val[j].field == NULL) {
virReportOOMError();
goto cleanup;
}
- val[i].value.type = params[i].type;
- switch (params[i].type) {
+ val[j].value.type = params[i].type;
+ switch (params[j].type) {
case VIR_TYPED_PARAM_INT:
- val[i].value.remote_typed_param_value_u.i = params[i].value.i;
+ val[j].value.remote_typed_param_value_u.i = params[i].value.i;
break;
case VIR_TYPED_PARAM_UINT:
- val[i].value.remote_typed_param_value_u.ui = params[i].value.ui;
+ val[j].value.remote_typed_param_value_u.ui = params[i].value.ui;
break;
case VIR_TYPED_PARAM_LLONG:
- val[i].value.remote_typed_param_value_u.l = params[i].value.l;
+ val[j].value.remote_typed_param_value_u.l = params[i].value.l;
break;
case VIR_TYPED_PARAM_ULLONG:
- val[i].value.remote_typed_param_value_u.ul = params[i].value.ul;
+ val[j].value.remote_typed_param_value_u.ul = params[i].value.ul;
break;
case VIR_TYPED_PARAM_DOUBLE:
- val[i].value.remote_typed_param_value_u.d = params[i].value.d;
+ val[j].value.remote_typed_param_value_u.d = params[i].value.d;
break;
case VIR_TYPED_PARAM_BOOLEAN:
- val[i].value.remote_typed_param_value_u.b = params[i].value.b;
+ val[j].value.remote_typed_param_value_u.b = params[i].value.b;
+ break;
+ case VIR_TYPED_PARAM_STRING:
+ val[j].value.remote_typed_param_value_u.s =
+ strdup(params[i].value.s);
+ if (val[j].value.remote_typed_param_value_u.s == NULL) {
+ virReportOOMError();
+ goto cleanup;
+ }
break;
default:
virNetError(VIR_ERR_RPC, _("unknown parameter type: %d"),
params[i].type);
goto cleanup;
}
+ j++;
}
*ret_params_val = val;
@@ -739,8 +752,11 @@ remoteSerializeTypedParameters(virTypedParameterPtr params,
cleanup:
if (val) {
- for (i = 0; i < nparams; i++)
+ for (i = 0; i < nparams; i++) {
VIR_FREE(val[i].field);
+ if (params[i].type == VIR_TYPED_PARAM_STRING)
+ VIR_FREE(val[i].value.remote_typed_param_value_u.s);
+ }
VIR_FREE(val);
}
return rv;
@@ -753,7 +769,7 @@ remoteDeserializeTypedParameters(remote_typed_param *args_params_val,
int limit,
int *nparams)
{
- int i;
+ int i = 0;
int rv = -1;
virTypedParameterPtr params = NULL;
@@ -804,6 +820,14 @@ remoteDeserializeTypedParameters(remote_typed_param *args_params_val,
params[i].value.b =
args_params_val[i].value.remote_typed_param_value_u.b;
break;
+ case VIR_TYPED_PARAM_STRING:
+ params[i].value.s =
+ strdup(args_params_val[i].value.remote_typed_param_value_u.s);
+ if (params[i].value.s == NULL) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ break;
default:
virNetError(VIR_ERR_INTERNAL_ERROR, _("unknown parameter type: %d"),
params[i].type);
@@ -814,8 +838,14 @@ remoteDeserializeTypedParameters(remote_typed_param *args_params_val,
rv = 0;
cleanup:
- if (rv < 0)
+ if (rv < 0) {
+ int j;
+ for (j = 0; j < i; ++j) {
+ if (params[j].type == VIR_TYPED_PARAM_STRING)
+ VIR_FREE(params[j].value.s);
+ }
VIR_FREE(params);
+ }
return params;
}
@@ -854,7 +884,8 @@ remoteDispatchDomainGetSchedulerParameters(virNetServerPtr server ATTRIBUTE_UNUS
if (remoteSerializeTypedParameters(params, nparams,
&ret->params.params_val,
- &ret->params.params_len) < 0)
+ &ret->params.params_len,
+ 0) < 0)
goto cleanup;
rv = 0;
@@ -908,7 +939,8 @@ remoteDispatchDomainGetSchedulerParametersFlags(virNetServerPtr server ATTRIBUTE
if (remoteSerializeTypedParameters(params, nparams,
&ret->params.params_val,
- &ret->params.params_len) < 0)
+ &ret->params.params_len,
+ args->flags) < 0)
goto cleanup;
rv = 0;
@@ -1095,7 +1127,8 @@ remoteDispatchDomainBlockStatsFlags(virNetServerPtr server ATTRIBUTE_UNUSED,
/* Serialise the block stats. */
if (remoteSerializeTypedParameters(params, nparams,
&ret->params.params_val,
- &ret->params.params_len) < 0)
+ &ret->params.params_len,
+ args->flags) < 0)
goto cleanup;
success:
@@ -1575,7 +1608,8 @@ remoteDispatchDomainGetMemoryParameters(virNetServerPtr server ATTRIBUTE_UNUSED,
if (remoteSerializeTypedParameters(params, nparams,
&ret->params.params_val,
- &ret->params.params_len) < 0)
+ &ret->params.params_len,
+ args->flags) < 0)
goto cleanup;
success:
@@ -1638,7 +1672,8 @@ remoteDispatchDomainGetBlkioParameters(virNetServerPtr server ATTRIBUTE_UNUSED,
if (remoteSerializeTypedParameters(params, nparams,
&ret->params.params_val,
- &ret->params.params_len) < 0)
+ &ret->params.params_len,
+ args->flags) < 0)
goto cleanup;
success:
@@ -1647,6 +1682,7 @@ success:
cleanup:
if (rv < 0)
virNetMessageSaveError(rerr);
+ virTypedParameterArrayClear(params, nparams);
VIR_FREE(params);
if (dom)
virDomainFree(dom);
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index f3b8ad5..94fd3e7 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -1244,8 +1244,11 @@ remoteFreeTypedParameters(remote_typed_param *args_params_val,
if (args_params_val == NULL)
return;
- for (i = 0; i < args_params_len; i++)
+ for (i = 0; i < args_params_len; i++) {
VIR_FREE(args_params_val[i].field);
+ if (args_params_val[i].value.type == VIR_TYPED_PARAM_STRING)
+ VIR_FREE(args_params_val[i].value.remote_typed_param_value_u.s);
+ }
VIR_FREE(args_params_val);
}
@@ -1294,6 +1297,13 @@ remoteSerializeTypedParameters(virTypedParameterPtr params,
case VIR_TYPED_PARAM_BOOLEAN:
val[i].value.remote_typed_param_value_u.b = params[i].value.b;
break;
+ case VIR_TYPED_PARAM_STRING:
+ val[i].value.remote_typed_param_value_u.s = strdup(params[i].value.s);
+ if (val[i].value.remote_typed_param_value_u.s == NULL) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ break;
default:
remoteError(VIR_ERR_RPC, _("unknown parameter type: %d"),
params[i].type);
@@ -1318,7 +1328,7 @@ remoteDeserializeTypedParameters(remote_typed_param *ret_params_val,
virTypedParameterPtr params,
int *nparams)
{
- int i;
+ int i = 0;
int rv = -1;
/* Check the length of the returned list carefully. */
@@ -1365,6 +1375,14 @@ remoteDeserializeTypedParameters(remote_typed_param *ret_params_val,
params[i].value.b =
ret_params_val[i].value.remote_typed_param_value_u.b;
break;
+ case VIR_TYPED_PARAM_STRING:
+ params[i].value.s =
+ strdup(ret_params_val[i].value.remote_typed_param_value_u.s);
+ if (params[i].value.s == NULL) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ break;
default:
remoteError(VIR_ERR_RPC, _("unknown parameter type: %d"),
params[i].type);
@@ -1375,6 +1393,12 @@ remoteDeserializeTypedParameters(remote_typed_param *ret_params_val,
rv = 0;
cleanup:
+ if (rv < 0) {
+ int j;
+ for (j = 0; j < i; j++)
+ if (params[j].type == VIR_TYPED_PARAM_STRING)
+ VIR_FREE(params[j].value.s);
+ }
return rv;
}
diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
index a174af8..5ea1114 100644
--- a/src/remote/remote_protocol.x
+++ b/src/remote/remote_protocol.x
@@ -317,6 +317,8 @@ union remote_typed_param_value switch (int type) {
double d;
case VIR_TYPED_PARAM_BOOLEAN:
int b;
+ case VIR_TYPED_PARAM_STRING:
+ remote_nonnull_string s;
};
struct remote_typed_param {
diff --git a/src/remote_protocol-structs b/src/remote_protocol-structs
index 12cedef..b460b77 100644
--- a/src/remote_protocol-structs
+++ b/src/remote_protocol-structs
@@ -6,6 +6,7 @@ enum {
VIR_TYPED_PARAM_ULLONG = 4,
VIR_TYPED_PARAM_DOUBLE = 5,
VIR_TYPED_PARAM_BOOLEAN = 6,
+ VIR_TYPED_PARAM_STRING = 7,
};
struct remote_nonnull_domain {
remote_nonnull_string name;
@@ -78,6 +79,7 @@ struct remote_typed_param_value {
uint64_t ul;
double d;
int b;
+ remote_nonnull_string s;
} remote_typed_param_value_u;
};
struct remote_typed_param {
diff --git a/src/rpc/gendispatch.pl b/src/rpc/gendispatch.pl
index 56af258..b36ca69 100755
--- a/src/rpc/gendispatch.pl
+++ b/src/rpc/gendispatch.pl
@@ -439,7 +439,8 @@ elsif ($opt_b) {
" $2,\n" .
" &n$1)) == NULL)\n" .
" goto cleanup;\n");
- push(@free_list, " VIR_FREE(params);");
+ push(@free_list, " virTypedParameterArrayClear($1, n$1);");
+ push(@free_list, " VIR_FREE($1);");
} elsif ($args_member =~ m/<\S+>;/ or $args_member =~ m/\[\S+\];/) {
# just make all other array types fail
die "unhandled type for argument value: $args_member";
--
1.7.3.1
More information about the libvir-list
mailing list