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target: Add target_submit_tmr helper function 

Similar to target_submit_cmd, this function lets fabrics call one function
(albeit with a lot of parameters) instead of 3 or more.

(nab: Add missing return for transport_lookup_tmr_lun failure)

Signed-off-by: Andy Grover <agrover@redhat.com>
Cc: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Andy Grover 2012-01-19 13:39:21 -08:00 committed by Nicholas Bellinger
parent a1321f71e8
commit ea98d7f9c7
2 changed files with 51 additions and 0 deletions
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48
drivers/target/target_core_transport.c
View File

@ -1687,6 +1687,54 @@ void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
}
EXPORT_SYMBOL(target_submit_cmd);
/**
* target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
* for TMR CDBs
*
* @se_cmd: command descriptor to submit
* @se_sess: associated se_sess for endpoint
* @sense: pointer to SCSI sense buffer
* @unpacked_lun: unpacked LUN to reference for struct se_lun
* @fabric_context: fabric context for TMR req
* @tm_type: Type of TM request
*
* Callable from all contexts.
**/
void target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
unsigned char *sense, u32 unpacked_lun,
void *fabric_tmr_ptr, unsigned char tm_type, int flags)
{
struct se_portal_group *se_tpg;
int ret;
se_tpg = se_sess->se_tpg;
BUG_ON(!se_tpg);
transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
0, DMA_NONE, MSG_SIMPLE_TAG, sense);
/* See target_submit_cmd for commentary */
target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, GFP_KERNEL);
if (ret < 0) {
dump_stack();
/* FIXME XXX */
return;
}
ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
if (ret) {
transport_send_check_condition_and_sense(se_cmd,
se_cmd->scsi_sense_reason, 0);
transport_generic_free_cmd(se_cmd, 0);
return;
}
transport_generic_handle_tmr(se_cmd);
}
EXPORT_SYMBOL(target_submit_tmr);
/*
* Used by fabric module frontends defining a TFO->new_cmd_map() caller
* to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to

3
include/target/target_core_fabric.h
View File

@ -116,6 +116,9 @@ int transport_lookup_cmd_lun(struct se_cmd *, u32);
int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
void target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
unsigned char *, u32, u32, int, int, int);
void target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
unsigned char *sense, u32 unpacked_lun,
void *fabric_tmr_ptr, unsigned char tm_type, int flags);
int transport_handle_cdb_direct(struct se_cmd *);
int transport_generic_handle_cdb_map(struct se_cmd *);
int transport_generic_handle_data(struct se_cmd *);