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target: Updates from AGrover and HCH (round 3)

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This patch contains a squashed version of third round series cleanups,
improvements ,and simplfications from Andy and Christoph ahead of the
heavy lifting between round 3 -> 4 for the target core SGL conversion.

This include cleanups to the main target I/O path and other miscellaneous
updates.

target: Replace custom sg<->buf functions with lib funcs
target: Simplify sector limiting code
target: get_cdb should never return NULL
target: Simplify transport_memcpy_se_mem_read_contig
target: Use assignment rather than increment for t_task_cdbs
target: Don't pass dma_size to generic_get_mem
target: Pass sg with type scatterlist in transport_map_sg_to_mem
target: Move task_sg_num next to task_sg in struct se_task
target: inline struct se_transport_task into struct se_cmd
target: Change name & semantics of transport_get_sectors()
target: Remove unused members of se_cmd
target: Rename se_cmd.t_task_cdbs to t_task_list_num
target: Fix some spelling
target: Remove unused var from transport_generic_do_tmr
target: map_sg_to_mem: return sg_count in return value
target/pscsi: Use min_t for sector limits
target/pscsi: Unused param for pscsi_get_bio()
target: Rename get_cdb_count to allocate_tasks
target: Make transport_generic_new_cmd() available for iscsi-target
target: Remove fabric callback to allocate iovecs
target: Fix transport_generic_new_cmd WRITE comment

(hch: Use __GFP_ZERO usage for alloc_pages() usage)

Signed-off-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Andy Grover
2011-05-02 17:12:10 -07:00
committed by Nicholas Bellinger
parent dd3a5ad8e0
commit a1d8b49abd
17 changed files with 583 additions and 753 deletions
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11
drivers/target/loopback/tcm_loop.c
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@@ -118,7 +118,7 @@ static struct se_cmd *tcm_loop_allocate_core_cmd(
* Signal BIDI usage with T_TASK(cmd)->t_tasks_bidi
*/
if (scsi_bidi_cmnd(sc))
se_cmd->t_task.t_tasks_bidi = 1;
se_cmd->t_tasks_bidi = 1;
/*
* Locate the struct se_lun pointer and attach it to struct se_cmd
*/
@@ -169,7 +169,7 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
* For BIDI commands, pass in the extra READ buffer
* to transport_generic_map_mem_to_cmd() below..
*/
if (se_cmd->t_task.t_tasks_bidi) {
if (se_cmd->t_tasks_bidi) {
struct scsi_data_buffer *sdb = scsi_in(sc);
sgl_bidi = sdb->table.sgl;
@@ -1423,13 +1423,6 @@ static int tcm_loop_register_configfs(void)
fabric->tf_ops.tpg_release_fabric_acl =
&tcm_loop_tpg_release_fabric_acl;
fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index;
/*
* Since tcm_loop is mapping physical memory from Linux/SCSI
* struct scatterlist arrays for each struct scsi_cmnd I/O,
* we do not need TCM to allocate a iovec array for
* virtual memory address mappings
*/
fabric->tf_ops.alloc_cmd_iovecs = NULL;
/*
* Used for setting up remaining TCM resources in process context
*/