This patch added a struct target_pr_ops contains TCMU
Persistent Reservation operation functions. Added a
"struct target_pr_ops" type pointer in target_backend_ops,
so that we can call TCMU PR functions from struct
target_backend_ops.
Signed-off-by: Zhu Lingshan <lszhu@xxxxxxxx>
---
drivers/target/target_core_user.c | 6 +++++
include/target/target_core_backend.h | 36 ++++++++++++++++++++++++++++
2 files changed, 42 insertions(+)
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 09a341e935a9..ea3685106d35 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -3701,6 +3701,11 @@ static struct configfs_attribute *tcmu_action_attrs[] = {
NULL,
};
+static struct target_pr_ops tcmu_pr_ops = {
+ .pr_read_keys = tcmu_execute_pr_read_keys,
+ .pr_register = tcmu_execute_pr_register,
+};
+
static struct target_backend_ops tcmu_ops = {
.name = "user",
.owner = THIS_MODULE,
@@ -3717,6 +3722,7 @@ static struct target_backend_ops tcmu_ops = {
.get_device_type = sbc_get_device_type,
.get_blocks = tcmu_get_blocks,
.tb_dev_action_attrs = tcmu_action_attrs,
+ .pr_ops = &tcmu_pr_ops,
};
static void find_free_blocks(void)
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 34a15d59ed88..36a820429cf4 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -51,11 +51,47 @@ struct target_backend_ops {
int (*init_prot)(struct se_device *);
int (*format_prot)(struct se_device *);
void (*free_prot)(struct se_device *);
+ struct target_pr_ops *pr_ops;
struct configfs_attribute **tb_dev_attrib_attrs;
struct configfs_attribute **tb_dev_action_attrs;
};
+enum target_pr_check_type {
+ /* check for *any* SCSI2 reservations, including own */
+ TARGET_PR_CHECK_SCSI2_ANY,
+ /* check for conflicting SCSI2 or SCSI3 reservation */
+ TARGET_PR_CHECK_SCSI2_SCSI3,
+};
+
+struct target_pr_ops {
+ sense_reason_t (*check_conflict)(struct se_cmd *cmd,
+ enum target_pr_check_type);
+ sense_reason_t (*scsi2_reserve)(struct se_cmd *cmd);
+ sense_reason_t (*scsi2_release)(struct se_cmd *cmd);
+ sense_reason_t (*reset)(struct se_device *dev);
+ sense_reason_t (*pr_register)(struct se_cmd *cmd, u64 old_key,
+ u64 new_key, bool aptpl, bool all_tg_pt,
+ bool spec_i_pt, bool ignore_existing);
+ sense_reason_t (*pr_reserve)(struct se_cmd *cmd, int type, u64 key);
+ sense_reason_t (*pr_release)(struct se_cmd *cmd, int type, u64 key);
+ sense_reason_t (*pr_clear)(struct se_cmd *cmd, u64 key);
+ sense_reason_t (*pr_preempt)(struct se_cmd *cmd, u64 old_key,
+ u64 new_key, int type, bool abort);
+ sense_reason_t (*pr_register_and_move)(struct se_cmd *cmd, u64 old_key,
+ u64 new_key, bool aptpl,
+ int unreg);
+ sense_reason_t (*pr_read_keys)(struct se_cmd *cmd, unsigned char *buf,
+ u32 buf_len);
+ sense_reason_t (*pr_read_reservation)(struct se_cmd *cmd,
+ unsigned char *buf, u32 buf_len);
+ sense_reason_t (*pr_report_capabilities)(struct se_cmd *cmd,
+ unsigned char *buf,
+ u32 buf_len);
+ sense_reason_t (*pr_read_full_status)(struct se_cmd *cmd,
+ unsigned char *buf, u32 buf_len);
+};
+
struct sbc_ops {
sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
u32, enum dma_data_direction);
--
2.17.1
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