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authorChristoph Hellwig <hch@lst.de>2012-11-06 12:24:09 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2012-11-06 20:55:46 -0800
commitde103c93aff0bed0ae984274e5dc8b95899badab (patch)
tree7db9bba755fa95772052e8d31285a38ba48f1a84 /include/target
parentfecae40abb1ae9218bdbaa8b8e30bfb5ae43f522 (diff)
downloadvexpress-lsk-de103c93aff0bed0ae984274e5dc8b95899badab.tar.gz
target: pass sense_reason as a return value
Pass the sense reason as an explicit return value from the I/O submission path instead of storing it in struct se_cmd and using negative return values. This cleans up a lot of the code pathes, and with the sparse annotations for the new sense_reason_t type allows for much better error checking. (nab: Convert spc_emulate_modesense + spc_emulate_modeselect to use sense_reason_t with Roland's MODE SELECT changes) Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_backend.h16
-rw-r--r--include/target/target_core_base.h46
-rw-r--r--include/target/target_core_fabric.h13
3 files changed, 38 insertions, 37 deletions
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index e57f738f04f..aa868090b9a 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -31,17 +31,17 @@ struct se_subsystem_api {
struct scatterlist *,
unsigned char *);
- int (*parse_cdb)(struct se_cmd *cmd);
+ sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
u32 (*get_device_type)(struct se_device *);
sector_t (*get_blocks)(struct se_device *);
unsigned char *(*get_sense_buffer)(struct se_cmd *);
};
struct sbc_ops {
- int (*execute_rw)(struct se_cmd *cmd);
- int (*execute_sync_cache)(struct se_cmd *cmd);
- int (*execute_write_same)(struct se_cmd *cmd);
- int (*execute_unmap)(struct se_cmd *cmd);
+ sense_reason_t (*execute_rw)(struct se_cmd *cmd);
+ sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
+ sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
+ sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
};
int transport_subsystem_register(struct se_subsystem_api *);
@@ -49,11 +49,11 @@ void transport_subsystem_release(struct se_subsystem_api *);
void target_complete_cmd(struct se_cmd *, u8);
-int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
-int spc_emulate_report_luns(struct se_cmd *cmd);
+sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
+sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd);
int spc_get_write_same_sectors(struct se_cmd *cmd);
-int sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
+sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
u32 sbc_get_device_rev(struct se_device *dev);
u32 sbc_get_device_type(struct se_device *dev);
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 11b0a68dc76..5350f6e580f 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -144,8 +144,6 @@ enum se_cmd_flags_table {
SCF_EMULATED_TASK_SENSE = 0x00000004,
SCF_SCSI_DATA_CDB = 0x00000008,
SCF_SCSI_TMR_CDB = 0x00000010,
- SCF_SCSI_CDB_EXCEPTION = 0x00000020,
- SCF_SCSI_RESERVATION_CONFLICT = 0x00000040,
SCF_FUA = 0x00000080,
SCF_SE_LUN_CMD = 0x00000100,
SCF_BIDI = 0x00000400,
@@ -167,27 +165,32 @@ enum transport_lunflags_table {
};
/*
- * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
+ * Used by transport_send_check_condition_and_sense()
* to signal which ASC/ASCQ sense payload should be built.
*/
+typedef unsigned __bitwise__ sense_reason_t;
+
enum tcm_sense_reason_table {
- TCM_NON_EXISTENT_LUN = 0x01,
- TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
- TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
- TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
- TCM_SERVICE_CRC_ERROR = 0x05,
- TCM_SNACK_REJECTED = 0x06,
- TCM_SECTOR_COUNT_TOO_MANY = 0x07,
- TCM_INVALID_CDB_FIELD = 0x08,
- TCM_INVALID_PARAMETER_LIST = 0x09,
- TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
- TCM_UNKNOWN_MODE_PAGE = 0x0b,
- TCM_WRITE_PROTECTED = 0x0c,
- TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
- TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
- TCM_CHECK_CONDITION_NOT_READY = 0x0f,
- TCM_RESERVATION_CONFLICT = 0x10,
- TCM_ADDRESS_OUT_OF_RANGE = 0x11,
+#define R(x) (__force sense_reason_t )(x)
+ TCM_NON_EXISTENT_LUN = R(0x01),
+ TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
+ TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
+ TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
+ TCM_SERVICE_CRC_ERROR = R(0x05),
+ TCM_SNACK_REJECTED = R(0x06),
+ TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
+ TCM_INVALID_CDB_FIELD = R(0x08),
+ TCM_INVALID_PARAMETER_LIST = R(0x09),
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
+ TCM_UNKNOWN_MODE_PAGE = R(0x0b),
+ TCM_WRITE_PROTECTED = R(0x0c),
+ TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
+ TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
+ TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
+ TCM_RESERVATION_CONFLICT = R(0x10),
+ TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
+ TCM_OUT_OF_RESOURCES = R(0x12),
+#undef R
};
enum target_sc_flags_table {
@@ -407,7 +410,6 @@ struct se_cmd {
u8 scsi_status;
u8 scsi_asc;
u8 scsi_ascq;
- u8 scsi_sense_reason;
u16 scsi_sense_length;
/* Delay for ALUA Active/NonOptimized state access in milliseconds */
int alua_nonop_delay;
@@ -445,7 +447,7 @@ struct se_cmd {
struct completion cmd_wait_comp;
struct kref cmd_kref;
struct target_core_fabric_ops *se_tfo;
- int (*execute_cmd)(struct se_cmd *);
+ sense_reason_t (*execute_cmd)(struct se_cmd *);
void (*transport_complete_callback)(struct se_cmd *);
unsigned char *t_task_cdb;
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 81ddb4ae6c3..9087b200e55 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -98,8 +98,8 @@ void transport_deregister_session(struct se_session *);
void transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
struct se_session *, u32, int, int, unsigned char *);
-int transport_lookup_cmd_lun(struct se_cmd *, u32);
-int target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
+sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
+sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
unsigned char *, unsigned char *, u32, u32, int, int, int,
struct scatterlist *, u32, struct scatterlist *, u32);
@@ -110,9 +110,7 @@ int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
void *fabric_tmr_ptr, unsigned char tm_type,
gfp_t, unsigned int, int);
int transport_handle_cdb_direct(struct se_cmd *);
-int transport_generic_map_mem_to_cmd(struct se_cmd *cmd,
- struct scatterlist *, u32, struct scatterlist *, u32);
-int transport_generic_new_cmd(struct se_cmd *);
+sense_reason_t transport_generic_new_cmd(struct se_cmd *);
void target_execute_cmd(struct se_cmd *cmd);
@@ -120,7 +118,8 @@ void transport_generic_free_cmd(struct se_cmd *, int);
bool transport_wait_for_tasks(struct se_cmd *);
int transport_check_aborted_status(struct se_cmd *, int);
-int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
+int transport_send_check_condition_and_sense(struct se_cmd *,
+ sense_reason_t, int);
int target_put_sess_cmd(struct se_session *, struct se_cmd *);
void target_sess_cmd_list_set_waiting(struct se_session *);
@@ -131,7 +130,7 @@ int core_alua_check_nonop_delay(struct se_cmd *);
int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
void core_tmr_release_req(struct se_tmr_req *);
int transport_generic_handle_tmr(struct se_cmd *);
-void transport_generic_request_failure(struct se_cmd *);
+void transport_generic_request_failure(struct se_cmd *, sense_reason_t);
int transport_lookup_tmr_lun(struct se_cmd *, u32);
struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,