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util: Export remoteDeserializeTypedParameters internally via util

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Currently, the deserializer is hardcoded into remote_driver which makes
it impossible for admin to use it. One way to achieve a shared implementation
(besides moving the code to another module) would be pass @ret_params_val as a
void pointer as opposed to the remote_typed_param pointer and add a new extra
argument specifying which of those two protocols is being used and typecast
the pointer at the function entry. An example from remote_protocol:

struct remote_typed_param_value {
        int type;
        union {
                int i;
                u_int ui;
                int64_t l;
                uint64_t ul;
                double d;
                int b;
                remote_nonnull_string s;
        } remote_typed_param_value_u;
};
typedef struct remote_typed_param_value remote_typed_param_value;

struct remote_typed_param {
        remote_nonnull_string field;
        remote_typed_param_value value;
};

That would leave us with a bunch of if-then-elses that needed to be used across
the method. This patch takes the other approach using the new datatype
introduced in one of earlier commits.
This commit is contained in:
Erik Skultety 2016-01-28 17:27:42 +01:00
parent 41a459947f
commit 0472cef685
6 changed files with 213 additions and 267 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

120
daemon/remote.c
View File

@ -101,12 +101,6 @@ 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 virTypedParameterPtr
remoteDeserializeTypedParameters(remote_typed_param *args_params_val,
u_int args_params_len,
int limit,
int *nparams);
static int
remoteSerializeTypedParameters(virTypedParameterPtr params,
int nparams,
@ -1495,84 +1489,6 @@ remoteSerializeTypedParameters(virTypedParameterPtr params,
return rv;
}
/* Helper to deserialize typed parameters. */
static virTypedParameterPtr
remoteDeserializeTypedParameters(remote_typed_param *args_params_val,
u_int args_params_len,
int limit,
int *nparams)
{
size_t i = 0;
int rv = -1;
virTypedParameterPtr params = NULL;
/* Check the length of the returned list carefully. */
if (limit && args_params_len > limit) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
goto cleanup;
}
if (VIR_ALLOC_N(params, args_params_len) < 0)
goto cleanup;
*nparams = args_params_len;
/* Deserialise the result. */
for (i = 0; i < args_params_len; ++i) {
if (virStrcpyStatic(params[i].field,
args_params_val[i].field) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Parameter %s too big for destination"),
args_params_val[i].field);
goto cleanup;
}
params[i].type = args_params_val[i].value.type;
switch (params[i].type) {
case VIR_TYPED_PARAM_INT:
params[i].value.i =
args_params_val[i].value.remote_typed_param_value_u.i;
break;
case VIR_TYPED_PARAM_UINT:
params[i].value.ui =
args_params_val[i].value.remote_typed_param_value_u.ui;
break;
case VIR_TYPED_PARAM_LLONG:
params[i].value.l =
args_params_val[i].value.remote_typed_param_value_u.l;
break;
case VIR_TYPED_PARAM_ULLONG:
params[i].value.ul =
args_params_val[i].value.remote_typed_param_value_u.ul;
break;
case VIR_TYPED_PARAM_DOUBLE:
params[i].value.d =
args_params_val[i].value.remote_typed_param_value_u.d;
break;
case VIR_TYPED_PARAM_BOOLEAN:
params[i].value.b =
args_params_val[i].value.remote_typed_param_value_u.b;
break;
case VIR_TYPED_PARAM_STRING:
if (VIR_STRDUP(params[i].value.s,
args_params_val[i].value.remote_typed_param_value_u.s) < 0)
goto cleanup;
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR, _("unknown parameter type: %d"),
params[i].type);
goto cleanup;
}
}
rv = 0;
cleanup:
if (rv < 0) {
virTypedParamsFree(params, i);
params = NULL;
}
return params;
}
static int
remoteDispatchDomainGetSchedulerParameters(virNetServerPtr server ATTRIBUTE_UNUSED,
virNetServerClientPtr client ATTRIBUTE_UNUSED,
@ -5392,9 +5308,9 @@ remoteDispatchDomainMigrateBegin3Params(virNetServerPtr server ATTRIBUTE_UNUSED,
if (!(dom = get_nonnull_domain(priv->conn, args->dom)))
goto cleanup;
if (!(params = remoteDeserializeTypedParameters(args->params.params_val,
args->params.params_len,
0, &nparams)))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->params.params_val,
args->params.params_len,
0, &params, &nparams) < 0)
goto cleanup;
if (!(xml = virDomainMigrateBegin3Params(dom, params, nparams,
@ -5445,9 +5361,9 @@ remoteDispatchDomainMigratePrepare3Params(virNetServerPtr server ATTRIBUTE_UNUSE
goto cleanup;
}
if (!(params = remoteDeserializeTypedParameters(args->params.params_val,
args->params.params_len,
0, &nparams)))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->params.params_val,
args->params.params_len,
0, &params, &nparams) < 0)
goto cleanup;
/* Wacky world of XDR ... */
@ -5506,9 +5422,9 @@ remoteDispatchDomainMigratePrepareTunnel3Params(virNetServerPtr server ATTRIBUTE
goto cleanup;
}
if (!(params = remoteDeserializeTypedParameters(args->params.params_val,
args->params.params_len,
0, &nparams)))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->params.params_val,
args->params.params_len,
0, &params, &nparams) < 0)
goto cleanup;
if (!(st = virStreamNew(priv->conn, VIR_STREAM_NONBLOCK)) ||
@ -5579,9 +5495,9 @@ remoteDispatchDomainMigratePerform3Params(virNetServerPtr server ATTRIBUTE_UNUSE
if (!(dom = get_nonnull_domain(priv->conn, args->dom)))
goto cleanup;
if (!(params = remoteDeserializeTypedParameters(args->params.params_val,
args->params.params_len,
0, &nparams)))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->params.params_val,
args->params.params_len,
0, &params, &nparams) < 0)
goto cleanup;
dconnuri = args->dconnuri == NULL ? NULL : *args->dconnuri;
@ -5636,9 +5552,9 @@ remoteDispatchDomainMigrateFinish3Params(virNetServerPtr server ATTRIBUTE_UNUSED
goto cleanup;
}
if (!(params = remoteDeserializeTypedParameters(args->params.params_val,
args->params.params_len,
0, &nparams)))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->params.params_val,
args->params.params_len,
0, &params, &nparams) < 0)
goto cleanup;
dom = virDomainMigrateFinish3Params(priv->conn, params, nparams,
@ -5696,9 +5612,9 @@ remoteDispatchDomainMigrateConfirm3Params(virNetServerPtr server ATTRIBUTE_UNUSE
if (!(dom = get_nonnull_domain(priv->conn, args->dom)))
goto cleanup;
if (!(params = remoteDeserializeTypedParameters(args->params.params_val,
args->params.params_len,
0, &nparams)))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->params.params_val,
args->params.params_len,
0, &params, &nparams) < 0)
goto cleanup;
if (virDomainMigrateConfirm3Params(dom, params, nparams,

1
src/libvirt_private.syms
View File

@ -2350,6 +2350,7 @@ virTypedParameterTypeFromString;
virTypedParameterTypeToString;
virTypedParamsCheck;
virTypedParamsCopy;
virTypedParamsDeserialize;
virTypedParamsFilter;
virTypedParamsGetStringList;
virTypedParamsReplaceString;

209
src/remote/remote_driver.c
View File

@ -72,11 +72,6 @@ VIR_LOG_INIT("remote.remote_driver");
# define HYPER_TO_ULONG(_to, _from) (_to) = (_from)
#endif
#define remoteDeserializeTypedParameters(ret_params_val, ret_params_len, \
limit, params, nparams) \
deserializeTypedParameters(__FUNCTION__, ret_params_val, ret_params_len, \
limit, params, nparams)
static bool inside_daemon;
struct private_data {
@ -1747,105 +1742,6 @@ remoteSerializeTypedParameters(virTypedParameterPtr params,
return rv;
}
/* Helper to deserialize typed parameters. */
static int
deserializeTypedParameters(const char *funcname,
remote_typed_param *ret_params_val,
u_int ret_params_len,
int limit,
virTypedParameterPtr *params,
int *nparams)
{
size_t i = 0;
int rv = -1;
bool userAllocated = *params != NULL;
if (ret_params_len > limit) {
virReportError(VIR_ERR_RPC,
_("%s: too many parameters '%u' for limit '%d'"),
funcname, ret_params_len, limit);
goto cleanup;
}
if (userAllocated) {
/* Check the length of the returned list carefully. */
if (ret_params_len > *nparams) {
virReportError(VIR_ERR_RPC,
_("%s: too many parameters '%u' for nparams '%d'"),
funcname, ret_params_len, *nparams);
goto cleanup;
}
} else {
if (VIR_ALLOC_N(*params, ret_params_len) < 0)
goto cleanup;
}
*nparams = ret_params_len;
/* Deserialise the result. */
for (i = 0; i < ret_params_len; ++i) {
virTypedParameterPtr param = *params + i;
remote_typed_param *ret_param = ret_params_val + i;
if (virStrcpyStatic(param->field,
ret_param->field) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: parameter %s too big for destination"),
funcname, ret_param->field);
goto cleanup;
}
param->type = ret_param->value.type;
switch (param->type) {
case VIR_TYPED_PARAM_INT:
param->value.i =
ret_param->value.remote_typed_param_value_u.i;
break;
case VIR_TYPED_PARAM_UINT:
param->value.ui =
ret_param->value.remote_typed_param_value_u.ui;
break;
case VIR_TYPED_PARAM_LLONG:
param->value.l =
ret_param->value.remote_typed_param_value_u.l;
break;
case VIR_TYPED_PARAM_ULLONG:
param->value.ul =
ret_param->value.remote_typed_param_value_u.ul;
break;
case VIR_TYPED_PARAM_DOUBLE:
param->value.d =
ret_param->value.remote_typed_param_value_u.d;
break;
case VIR_TYPED_PARAM_BOOLEAN:
param->value.b =
ret_param->value.remote_typed_param_value_u.b;
break;
case VIR_TYPED_PARAM_STRING:
if (VIR_STRDUP(param->value.s,
ret_param->value.remote_typed_param_value_u.s) < 0)
goto cleanup;
break;
default:
virReportError(VIR_ERR_RPC, _("%s: unknown parameter type: %d"),
funcname, param->type);
goto cleanup;
}
}
rv = 0;
cleanup:
if (rv < 0) {
if (userAllocated) {
virTypedParamsClear(*params, i);
} else {
virTypedParamsFree(*params, i);
*params = NULL;
}
}
return rv;
}
static int
remoteDeserializeDomainDiskErrors(remote_domain_disk_error *ret_errors_val,
u_int ret_errors_len,
@ -1922,12 +1818,12 @@ remoteDomainBlockStatsFlags(virDomainPtr domain,
*nparams = ret.params.params_len;
/* Deserialise the result. */
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
/* Deserialize the result. */
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -1971,11 +1867,11 @@ remoteDomainGetMemoryParameters(virDomainPtr domain,
goto cleanup;
}
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -2019,11 +1915,11 @@ remoteDomainGetNumaParameters(virDomainPtr domain,
goto cleanup;
}
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_NUMA_PARAMETERS_MAX,
&params,
nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_NUMA_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -2067,11 +1963,11 @@ remoteDomainGetBlkioParameters(virDomainPtr domain,
goto cleanup;
}
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_BLKIO_PARAMETERS_MAX,
&params,
nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_BLKIO_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -2991,11 +2887,11 @@ static int remoteDomainGetBlockIoTune(virDomainPtr domain,
goto cleanup;
}
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -3081,9 +2977,10 @@ static int remoteDomainGetCPUStats(virDomainPtr domain,
virTypedParameterPtr cpu_params = &params[cpu * nparams];
remote_typed_param *stride = &ret.params.params_val[cpu * ret.nparams];
if (remoteDeserializeTypedParameters(stride, ret.nparams,
REMOTE_NODE_CPU_STATS_MAX,
&cpu_params, &tmp) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) stride,
ret.nparams,
REMOTE_NODE_CPU_STATS_MAX,
&cpu_params, &tmp) < 0)
goto cleanup;
}
@ -5480,10 +5377,10 @@ remoteDomainBuildEventCallbackTunable(virNetClientProgramPtr prog ATTRIBUTE_UNUS
int nparams = 0;
virObjectEventPtr event = NULL;
if (remoteDeserializeTypedParameters(msg->params.params_val,
msg->params.params_len,
REMOTE_DOMAIN_EVENT_TUNABLE_MAX,
&params, &nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) msg->params.params_val,
msg->params.params_len,
REMOTE_DOMAIN_EVENT_TUNABLE_MAX,
&params, &nparams) < 0)
return;
dom = get_nonnull_domain(conn, msg->dom);
@ -6720,11 +6617,11 @@ remoteDomainGetInterfaceParameters(virDomainPtr domain,
goto cleanup;
}
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_INTERFACE_PARAMETERS_MAX,
&params,
nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_INTERFACE_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -6900,11 +6797,11 @@ remoteNodeGetMemoryParameters(virConnectPtr conn,
goto cleanup;
}
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_NODE_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_NODE_MEMORY_PARAMETERS_MAX,
&params,
nparams) < 0)
goto cleanup;
rv = 0;
@ -7021,10 +6918,10 @@ remoteDomainGetJobStats(virDomainPtr domain,
*type = ret.type;
if (remoteDeserializeTypedParameters(ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_JOB_STATS_MAX,
params, nparams) < 0)
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.params.params_val,
ret.params.params_len,
REMOTE_DOMAIN_JOB_STATS_MAX,
params, nparams) < 0)
goto cleanup;
rv = 0;
@ -7802,11 +7699,11 @@ remoteConnectGetAllDomainStats(virConnectPtr conn,
if (!(elem->dom = get_nonnull_domain(conn, rec->dom)))
goto cleanup;
if (remoteDeserializeTypedParameters(rec->params.params_val,
rec->params.params_len,
REMOTE_CONNECT_GET_ALL_DOMAIN_STATS_MAX,
&elem->params,
&elem->nparams))
if (virTypedParamsDeserialize((virTypedParameterRemotePtr) rec->params.params_val,
rec->params.params_len,
REMOTE_CONNECT_GET_ALL_DOMAIN_STATS_MAX,
&elem->params,
&elem->nparams))
goto cleanup;
tmpret[i] = elem;

19
src/rpc/gendispatch.pl
View File

@ -557,10 +557,11 @@ elsif ($mode eq "server") {
}
push(@args_list, "$1");
push(@args_list, "n$1");
push(@getters_list, " if (($1 = remoteDeserializeTypedParameters(args->$1.$1_val,\n" .
" args->$1.$1_len,\n" .
" $2,\n" .
" &n$1)) == NULL)\n" .
push(@getters_list, " if (virTypedParamsDeserialize((virTypedParameterRemotePtr) args->$1.$1_val,\n" .
" args->$1.$1_len,\n" .
" $2,\n" .
" &$1,\n" .
" &n$1) < 0)\n" .
" goto cleanup;\n");
push(@free_list, " virTypedParamsFree($1, n$1);");
} elsif ($args_member =~ m/<\S+>;/ or $args_member =~ m/\[\S+\];/) {
@ -1356,11 +1357,11 @@ elsif ($mode eq "client") {
}
} elsif ($ret_member =~ m/^remote_typed_param (\S+)<(\S+)>;\s*\/\*\s*insert@(\d+)\s*\*\//) {
splice(@args_list, int($3), 0, ("virTypedParameterPtr $1"));
push(@ret_list2, "if (remoteDeserializeTypedParameters(ret.$1.$1_val,\n" .
" ret.$1.$1_len,\n" .
" $2,\n" .
" &$1,\n" .
" n$1) < 0)\n" .
push(@ret_list2, "if (virTypedParamsDeserialize((virTypedParameterRemotePtr) ret.$1.$1_val,\n" .
" ret.$1.$1_len,\n" .
" $2,\n" .
" &$1,\n" .
" n$1) < 0)\n" .
" goto cleanup;\n");
$single_ret_cleanup = 1;
} elsif ($ret_member =~ m/^remote_typed_param (\S+)<\S+>;/) {

125
src/util/virtypedparam.c
View File

@ -1315,3 +1315,128 @@ virTypedParamsFree(virTypedParameterPtr params,
virTypedParamsClear(params, nparams);
VIR_FREE(params);
}
/**
* virTypedParamsDeserialize:
* @remote_params: protocol data to be deserialized (obtained from remote side)
* @remote_params_len: number of parameters returned in @remote_params
* @limit: user specified maximum limit to @remote_params_len
* @params: pointer which will hold the deserialized @remote_params data
* @nparams: number of entries in @params
*
* This function will attempt to deserialize protocol-encoded data obtained
* from remote side. Two modes of operation are supported, depending on the
* caller's design:
* 1) Older APIs do not rely on deserializer allocating memory for @params,
* thus calling the deserializer twice, once to find out the actual number of
* parameters for @params to hold, followed by an allocation of @params and
* a second call to the deserializer to actually retrieve the data.
* 2) Newer APIs rely completely on the deserializer to allocate the right
* ammount of memory for @params to hold all the data obtained in
* @remote_params.
*
* If used with model 1, two checks are performed, first one comparing the user
* specified limit to the actual size of remote data and the second one
* verifying the user allocated amount of memory is indeed capable of holding
* remote data @remote_params.
* With model 2, only the first check against @limit is performed.
*
* Returns 0 on success or -1 in case of an error.
*/
int
virTypedParamsDeserialize(virTypedParameterRemotePtr remote_params,
unsigned int remote_params_len,
int limit,
virTypedParameterPtr *params,
int *nparams)
{
size_t i = 0;
int rv = -1;
bool userAllocated = *params != NULL;
if (limit && remote_params_len > limit) {
virReportError(VIR_ERR_RPC,
_("too many parameters '%u' for limit '%d'"),
remote_params_len, limit);
goto cleanup;
}
if (userAllocated) {
/* Check the length of the returned list carefully. */
if (remote_params_len > *nparams) {
virReportError(VIR_ERR_RPC,
_("too many parameters '%u' for nparams '%d'"),
remote_params_len, *nparams);
goto cleanup;
}
} else {
if (VIR_ALLOC_N(*params, remote_params_len) < 0)
goto cleanup;
}
*nparams = remote_params_len;
/* Deserialize the result. */
for (i = 0; i < remote_params_len; ++i) {
virTypedParameterPtr param = *params + i;
virTypedParameterRemotePtr remote_param = remote_params + i;
if (virStrcpyStatic(param->field,
remote_param->field) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("parameter %s too big for destination"),
remote_param->field);
goto cleanup;
}
param->type = remote_param->value.type;
switch (param->type) {
case VIR_TYPED_PARAM_INT:
param->value.i =
remote_param->value.remote_typed_param_value.i;
break;
case VIR_TYPED_PARAM_UINT:
param->value.ui =
remote_param->value.remote_typed_param_value.ui;
break;
case VIR_TYPED_PARAM_LLONG:
param->value.l =
remote_param->value.remote_typed_param_value.l;
break;
case VIR_TYPED_PARAM_ULLONG:
param->value.ul =
remote_param->value.remote_typed_param_value.ul;
break;
case VIR_TYPED_PARAM_DOUBLE:
param->value.d =
remote_param->value.remote_typed_param_value.d;
break;
case VIR_TYPED_PARAM_BOOLEAN:
param->value.b =
remote_param->value.remote_typed_param_value.b;
break;
case VIR_TYPED_PARAM_STRING:
if (VIR_STRDUP(param->value.s,
remote_param->value.remote_typed_param_value.s) < 0)
goto cleanup;
break;
default:
virReportError(VIR_ERR_RPC, _("unknown parameter type: %d"),
param->type);
goto cleanup;
}
}
rv = 0;
cleanup:
if (rv < 0) {
if (userAllocated) {
virTypedParamsClear(*params, i);
} else {
virTypedParamsFree(*params, i);
*params = NULL;
}
}
return rv;
}

6
src/util/virtypedparam.h
View File

@ -104,6 +104,12 @@ int virTypedParamsCopy(virTypedParameterPtr *dst,
char *virTypedParameterToString(virTypedParameterPtr param);
int virTypedParamsDeserialize(virTypedParameterRemotePtr remote_params,
unsigned int remote_params_len,
int limit,
virTypedParameterPtr *params,
int *nparams);
VIR_ENUM_DECL(virTypedParameter)
# define VIR_TYPED_PARAMS_DEBUG(params, nparams) \