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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-11-18 20:36:22 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-12-14 11:40:56 +0000 |
| commit | a63607855224702ea17e6016ecf3f7d544e83625 (patch) | |
| tree | 844d9a7dbdc636ba657763f04945b91ca8da9ba7 /include | |
| parent | 7481deb413be132a22193e8a0bce88b311ecb3c2 (diff) | |
| download | linux-0-day-a63607855224702ea17e6016ecf3f7d544e83625.tar.gz linux-0-day-a63607855224702ea17e6016ecf3f7d544e83625.tar.xz | |
target: Add target_submit_cmd() for process context fabric submission
This patch adds a target_submit_cmd() caller that can be used by fabrics
to submit an uninitialized se_cmd descriptor to an struct se_session +
unpacked_lun from workqueue process context. This call will invoke the
following steps:
- transport_init_se_cmd() to setup se_cmd specific pointers
- Obtain se_cmd->cmd_kref references with target_get_sess_cmd()
- set se_cmd->t_tasks_bidi
- transport_lookup_cmd_lun() to setup struct se_cmd->se_lun from
the passed unpacked_lun
- transport_generic_allocate_tasks() to setup the passed *cdb, and
- transport_handle_cdb_direct() handle READ dispatch or WRITE
ready-to-transfer callback to fabric
v2 changes from hch feedback:
*) Add target_sc_flags_table for target_submit_cmd flags
*) Rename bidi parameter to flags, add TARGET_SCF_BIDI_OP
*) Convert checks to BUG_ON
*) Add out_check_cond for transport_send_check_condition_and_sense
usage
v3 changes:
*) Add TARGET_SCF_ACK_KREF for target_submit_cmd into
target_get_sess_cmd to determine when the fabric caller is expecting
a second kref_put() from fabric packet acknowledgement.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/target/target_core_base.h | 5 | ||||
| -rw-r--r-- | include/target/target_core_fabric.h | 4 |
2 files changed, 8 insertions, 1 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index af088a9e4905d..28190dc10eef9 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -226,6 +226,11 @@ enum tcm_sense_reason_table { TCM_RESERVATION_CONFLICT = 0x10, }; +enum target_sc_flags_table { + TARGET_SCF_BIDI_OP = 0x01, + TARGET_SCF_ACK_KREF = 0x02, +}; + /* fabric independent task management function values */ enum tcm_tmreq_table { TMR_ABORT_TASK = 1, diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index d035d865dbefe..aaa26da5a527f 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -118,6 +118,8 @@ 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 transport_generic_allocate_tasks(struct se_cmd *, unsigned char *); +int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *, + unsigned char *, u32, u32, int, int, int); 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 *); @@ -134,7 +136,7 @@ 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); -void target_get_sess_cmd(struct se_session *, struct se_cmd *); +void target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); int target_put_sess_cmd(struct se_session *, struct se_cmd *); void target_splice_sess_cmd_list(struct se_session *); void target_wait_for_sess_cmds(struct se_session *, int); |