@@ -49,7 +49,8 @@
/* All UBLK_F_* have to be included into UBLK_F_ALL */
#define UBLK_F_ALL (UBLK_F_SUPPORT_ZERO_COPY \
| UBLK_F_URING_CMD_COMP_IN_TASK \
- | UBLK_F_NEED_GET_DATA)
+ | UBLK_F_NEED_GET_DATA \
+ | UBLK_F_USER_RECOVERY)
/* All UBLK_PARAM_TYPE_* should be included here */
#define UBLK_PARAM_TYPE_ALL (UBLK_PARAM_TYPE_BASIC | UBLK_PARAM_TYPE_DISCARD)
@@ -323,6 +324,21 @@ static inline int ublk_queue_cmd_buf_size(struct ublk_device *ub, int q_id)
PAGE_SIZE);
}
+static inline bool ublk_queue_can_use_recovery(
+ struct ublk_queue *ubq)
+{
+ if (ubq->flags & UBLK_F_USER_RECOVERY)
+ return true;
+ return false;
+}
+
+static inline bool ublk_can_use_recovery(struct ublk_device *ub)
+{
+ if (ub->dev_info.flags & UBLK_F_USER_RECOVERY)
+ return true;
+ return false;
+}
+
static void ublk_free_disk(struct gendisk *disk)
{
struct ublk_device *ub = disk->private_data;
@@ -74,9 +74,12 @@
*/
#define UBLK_F_NEED_GET_DATA (1UL << 2)
+#define UBLK_F_USER_RECOVERY (1UL << 3)
+
/* device state */
#define UBLK_S_DEV_DEAD 0
#define UBLK_S_DEV_LIVE 1
+#define UBLK_S_DEV_QUIESCED 2
/* shipped via sqe->cmd of io_uring command */
struct ublksrv_ctrl_cmd {
Define some macros for recovery feature. UBLK_S_DEV_QUIESCED implies that ublk_device is quiesced and is ready for recovery. This state can be observed by userspace. UBLK_F_USER_RECOVERY implies that: (1) ublk_drv enables recovery feature. It won't let monitor_work to automatically abort rqs and release the device. (2) With a dying ubq_daemon, ublk_drv ends(aborts) rqs issued to userspace(ublksrv) before crash. (3) With a dying ubq_daemon, in task work and ublk_queue_rq(), ublk_drv requeues rqs. Signed-off-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com> --- drivers/block/ublk_drv.c | 18 +++++++++++++++++- include/uapi/linux/ublk_cmd.h | 3 +++ 2 files changed, 20 insertions(+), 1 deletion(-)