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https://gitlab.com/libvirt/libvirt.git
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qemu: caps: Move QAPI schema related code into separate file
Extract the code into qemu_qapi.c/h so that we separate it from various parts of the code. Signed-off-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Peter Krempa
parent
9be9e26b74
commit
367697c54c
@ -141,6 +141,7 @@ src/qemu/qemu_monitor_json.c
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src/qemu/qemu_monitor_text.c
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src/qemu/qemu_parse_command.c
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src/qemu/qemu_process.c
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src/qemu/qemu_qapi.c
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src/remote/remote_client_bodies.h
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src/remote/remote_daemon.c
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src/remote/remote_daemon_config.c
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@ -46,6 +46,8 @@ QEMU_DRIVER_SOURCES = \
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qemu/qemu_capspriv.h \
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qemu/qemu_security.c \
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qemu/qemu_security.h \
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qemu/qemu_qapi.c \
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qemu/qemu_qapi.h \
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$(NULL)
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@ -46,6 +46,7 @@
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#include "qemu_domain.h"
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#define __QEMU_CAPSPRIV_H_ALLOW__
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#include "qemu_capspriv.h"
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#include "qemu_qapi.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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@ -4564,163 +4565,6 @@ virQEMUCapsInitQMPBasicArch(virQEMUCapsPtr qemuCaps)
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}
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/**
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* virQEMUCapsQMPSchemaObjectGetType:
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* @field: name of the object containing the requested type
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* @name: name of the requested type
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* @namefield: name of the object property holding @name
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*
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* Helper that selects the type of a QMP schema object member or it's variant
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* member. Returns the type string on success or NULL on error.
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*/
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static const char *
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virQEMUCapsQMPSchemaObjectGetType(const char *field,
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const char *name,
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const char *namefield,
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virJSONValuePtr elem)
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{
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virJSONValuePtr arr;
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virJSONValuePtr cur;
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const char *curname;
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const char *type;
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size_t i;
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if (!(arr = virJSONValueObjectGetArray(elem, field)))
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return NULL;
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for (i = 0; i < virJSONValueArraySize(arr); i++) {
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if (!(cur = virJSONValueArrayGet(arr, i)) ||
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!(curname = virJSONValueObjectGetString(cur, namefield)) ||
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!(type = virJSONValueObjectGetString(cur, "type")))
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continue;
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if (STREQ(name, curname))
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return type;
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}
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return NULL;
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}
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static virJSONValuePtr
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virQEMUCapsQMPSchemaTraverse(const char *baseName,
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char **query,
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virHashTablePtr schema)
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{
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virJSONValuePtr base;
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const char *metatype;
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do {
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if (!(base = virHashLookup(schema, baseName)))
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return NULL;
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if (!*query)
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return base;
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if (!(metatype = virJSONValueObjectGetString(base, "meta-type")))
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return NULL;
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/* flatten arrays by default */
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if (STREQ(metatype, "array")) {
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if (!(baseName = virJSONValueObjectGetString(base, "element-type")))
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return NULL;
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continue;
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} else if (STREQ(metatype, "object")) {
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if (**query == '+')
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baseName = virQEMUCapsQMPSchemaObjectGetType("variants",
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*query + 1,
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"case", base);
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else
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baseName = virQEMUCapsQMPSchemaObjectGetType("members",
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*query,
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"name", base);
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if (!baseName)
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return NULL;
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} else if (STREQ(metatype, "command") ||
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STREQ(metatype, "event")) {
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if (!(baseName = virJSONValueObjectGetString(base, *query)))
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return NULL;
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} else {
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/* alternates, basic types and enums can't be entered */
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return NULL;
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}
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query++;
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} while (*query);
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return base;
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}
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/**
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* virQEMUCapsQMPSchemaGetByPath:
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* @query: string specifying the required data type (see below)
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* @schema: hash table containing the schema data
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* @entry: filled with the located schema object requested by @query
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*
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* Retrieves the requested schema entry specified by @query to @entry. The
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* @query parameter has the following syntax which is very closely tied to the
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* qemu schema syntax entries separated by slashes with a few special characters:
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*
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* "command_or_event/attribute/subattribute/+variant_discriminator/subattribute"
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*
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* command_or_event: name of the event or attribute to introspect
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* attribute: selects whether arguments or return type should be introspected
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* ("arg-type" or "ret-type" for commands, "arg-type" for events)
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* subattribute: specifies member name of object types
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* +variant_discriminator: In the case of unionized objects, select a
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* specific case to introspect.
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*
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* Array types are automatically flattened to the singular type. Alternate
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* types are currently not supported.
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*
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* The above types can be chained arbitrarily using slashes to construct any
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* path into the schema tree.
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*
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* Returns 0 on success (including if the requested schema was not found) and
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* fills @entry appropriately. On failure returns -1 and sets an appropriate
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* error message.
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*/
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static int
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virQEMUCapsQMPSchemaGetByPath(const char *query,
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virHashTablePtr schema,
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virJSONValuePtr *entry)
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{
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char **elems = NULL;
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*entry = NULL;
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if (!(elems = virStringSplit(query, "/", 0)))
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return -1;
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if (!*elems) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("malformed query string"));
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virStringListFree(elems);
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return -1;
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}
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*entry = virQEMUCapsQMPSchemaTraverse(*elems, elems + 1, schema);
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virStringListFree(elems);
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return 0;
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}
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static bool
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virQEMUCapsQMPSchemaQueryPath(const char *query,
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virHashTablePtr schema)
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{
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virJSONValuePtr entry;
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if (virQEMUCapsQMPSchemaGetByPath(query, schema, &entry))
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return false;
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return !!entry;
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}
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static int
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virQEMUCapsProbeQMPSchemaCapabilities(virQEMUCapsPtr qemuCaps,
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qemuMonitorPtr mon)
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187
src/qemu/qemu_qapi.c
Normal file
187
src/qemu/qemu_qapi.c
Normal file
@ -0,0 +1,187 @@
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/*
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* qemu_qapi.c: helper functions for QEMU QAPI schema handling
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "qemu_qapi.h"
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#include "viralloc.h"
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#include "virstring.h"
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#include "virerror.h"
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#include "virlog.h"
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#define VIR_FROM_THIS VIR_FROM_QEMU
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VIR_LOG_INIT("qemu.qemu_qapi");
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/**
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* virQEMUCapsQMPSchemaObjectGetType:
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* @field: name of the object containing the requested type
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* @name: name of the requested type
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* @namefield: name of the object property holding @name
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*
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* Helper that selects the type of a QMP schema object member or it's variant
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* member. Returns the type string on success or NULL on error.
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*/
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static const char *
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virQEMUCapsQMPSchemaObjectGetType(const char *field,
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const char *name,
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const char *namefield,
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virJSONValuePtr elem)
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{
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virJSONValuePtr arr;
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virJSONValuePtr cur;
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const char *curname;
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const char *type;
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size_t i;
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if (!(arr = virJSONValueObjectGetArray(elem, field)))
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return NULL;
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for (i = 0; i < virJSONValueArraySize(arr); i++) {
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if (!(cur = virJSONValueArrayGet(arr, i)) ||
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!(curname = virJSONValueObjectGetString(cur, namefield)) ||
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!(type = virJSONValueObjectGetString(cur, "type")))
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continue;
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if (STREQ(name, curname))
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return type;
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}
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return NULL;
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}
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static virJSONValuePtr
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virQEMUCapsQMPSchemaTraverse(const char *baseName,
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char **query,
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virHashTablePtr schema)
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{
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virJSONValuePtr base;
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const char *metatype;
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do {
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if (!(base = virHashLookup(schema, baseName)))
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return NULL;
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if (!*query)
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return base;
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if (!(metatype = virJSONValueObjectGetString(base, "meta-type")))
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return NULL;
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/* flatten arrays by default */
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if (STREQ(metatype, "array")) {
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if (!(baseName = virJSONValueObjectGetString(base, "element-type")))
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return NULL;
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continue;
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} else if (STREQ(metatype, "object")) {
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if (**query == '+')
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baseName = virQEMUCapsQMPSchemaObjectGetType("variants",
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*query + 1,
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"case", base);
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else
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baseName = virQEMUCapsQMPSchemaObjectGetType("members",
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*query,
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"name", base);
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if (!baseName)
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return NULL;
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} else if (STREQ(metatype, "command") ||
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STREQ(metatype, "event")) {
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if (!(baseName = virJSONValueObjectGetString(base, *query)))
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return NULL;
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} else {
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/* alternates, basic types and enums can't be entered */
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return NULL;
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}
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query++;
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} while (*query);
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return base;
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}
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/**
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* virQEMUCapsQMPSchemaGetByPath:
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* @query: string specifying the required data type (see below)
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* @schema: hash table containing the schema data
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* @entry: filled with the located schema object requested by @query
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*
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* Retrieves the requested schema entry specified by @query to @entry. The
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* @query parameter has the following syntax which is very closely tied to the
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* qemu schema syntax entries separated by slashes with a few special characters:
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*
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* "command_or_event/attribute/subattribute/+variant_discriminator/subattribute"
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*
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* command_or_event: name of the event or attribute to introspect
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* attribute: selects whether arguments or return type should be introspected
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* ("arg-type" or "ret-type" for commands, "arg-type" for events)
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* subattribute: specifies member name of object types
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* +variant_discriminator: In the case of unionized objects, select a
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* specific case to introspect.
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*
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* Array types are automatically flattened to the singular type. Alternate
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* types are currently not supported.
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*
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* The above types can be chained arbitrarily using slashes to construct any
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* path into the schema tree.
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*
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* Returns 0 on success (including if the requested schema was not found) and
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* fills @entry appropriately. On failure returns -1 and sets an appropriate
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* error message.
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*/
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int
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virQEMUCapsQMPSchemaGetByPath(const char *query,
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virHashTablePtr schema,
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virJSONValuePtr *entry)
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{
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char **elems = NULL;
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*entry = NULL;
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if (!(elems = virStringSplit(query, "/", 0)))
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return -1;
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if (!*elems) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("malformed query string"));
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virStringListFree(elems);
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return -1;
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}
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*entry = virQEMUCapsQMPSchemaTraverse(*elems, elems + 1, schema);
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virStringListFree(elems);
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return 0;
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}
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bool
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virQEMUCapsQMPSchemaQueryPath(const char *query,
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virHashTablePtr schema)
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{
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virJSONValuePtr entry;
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if (virQEMUCapsQMPSchemaGetByPath(query, schema, &entry))
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return false;
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return !!entry;
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}
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36
src/qemu/qemu_qapi.h
Normal file
36
src/qemu/qemu_qapi.h
Normal file
@ -0,0 +1,36 @@
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/*
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* qemu_qapi.h: helper functions for QEMU QAPI schema
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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||||
* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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||||
* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef __QEMU_QAPI_H__
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# define __QEMU_QAPI_H__
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# include "internal.h"
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# include "virhash.h"
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# include "virjson.h"
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int
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virQEMUCapsQMPSchemaGetByPath(const char *query,
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virHashTablePtr schema,
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virJSONValuePtr *entry);
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bool
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virQEMUCapsQMPSchemaQueryPath(const char *query,
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virHashTablePtr schema);
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#endif /* __QEMU_QAPI_H__ */
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