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Berrange" , Markus Armbruster , Steve Sistare Subject: [PATCH V1 08/26] migration: vmstate_info_void_ptr Date: Mon, 29 Apr 2024 08:55:17 -0700 Message-Id: <1714406135-451286-9-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1714406135-451286-1-git-send-email-steven.sistare@oracle.com> References: <1714406135-451286-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-29_14,2024-04-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 malwarescore=0 adultscore=0 mlxscore=0 suspectscore=0 phishscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404290101 X-Proofpoint-ORIG-GUID: DVn4SmJXNGnbMp5mluxbY-_8LL3x95ta X-Proofpoint-GUID: DVn4SmJXNGnbMp5mluxbY-_8LL3x95ta Received-SPF: pass client-ip=205.220.177.32; envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Define VMSTATE_VOID_PTR so the value of a pointer (but not its target) can be saved in the migration stream. This will be needed for CPR. Signed-off-by: Steve Sistare Reviewed-by: Fabiano Rosas --- include/migration/vmstate.h | 15 +++++++++++++++ migration/vmstate-types.c | 24 ++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index a39c0e6..bb885d9 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -236,6 +236,7 @@ extern const VMStateInfo vmstate_info_uint8; extern const VMStateInfo vmstate_info_uint16; extern const VMStateInfo vmstate_info_uint32; extern const VMStateInfo vmstate_info_uint64; +extern const VMStateInfo vmstate_info_void_ptr; /** Put this in the stream when migrating a null pointer.*/ #define VMS_NULLPTR_MARKER (0x30U) /* '0' */ @@ -326,6 +327,17 @@ extern const VMStateInfo vmstate_info_qlist; .offset = vmstate_offset_value(_state, _field, _type), \ } +#define VMSTATE_SINGLE_TEST_NO_CHECK(_field, _state, _test, \ + _version, _info, _type) { \ + .name = (stringify(_field)), \ + .version_id = (_version), \ + .field_exists = (_test), \ + .size = sizeof(_type), \ + .info = &(_info), \ + .flags = VMS_SINGLE, \ + .offset = offsetof(_state, _field) \ +} + #define VMSTATE_SINGLE_FULL(_field, _state, _test, _version, _info, \ _type, _err_hint) { \ .name = (stringify(_field)), \ @@ -952,6 +964,9 @@ extern const VMStateInfo vmstate_info_qlist; #define VMSTATE_UINT64(_f, _s) \ VMSTATE_UINT64_V(_f, _s, 0) +#define VMSTATE_VOID_PTR(_f, _s) \ + VMSTATE_SINGLE_TEST_NO_CHECK(_f, _s, NULL, 0, vmstate_info_void_ptr, void *) + #ifdef CONFIG_LINUX #define VMSTATE_U8(_f, _s) \ diff --git a/migration/vmstate-types.c b/migration/vmstate-types.c index e83bfcc..097ecad 100644 --- a/migration/vmstate-types.c +++ b/migration/vmstate-types.c @@ -314,6 +314,30 @@ const VMStateInfo vmstate_info_uint64 = { .put = put_uint64, }; +/* 64 bit pointer */ + +static int get_void_ptr(QEMUFile *f, void *pv, size_t size, + const VMStateField *field) +{ + void **v = pv; + qemu_get_be64s(f, (uint64_t *)v); + return 0; +} + +static int put_void_ptr(QEMUFile *f, void *pv, size_t size, + const VMStateField *field, JSONWriter *vmdesc) +{ + void **v = pv; + qemu_put_be64s(f, (uint64_t *)v); + return 0; +} + +const VMStateInfo vmstate_info_void_ptr = { + .name = "void_ptr", + .get = get_void_ptr, + .put = put_void_ptr, +}; + static int get_nullptr(QEMUFile *f, void *pv, size_t size, const VMStateField *field)