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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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21
drivers/target/tcm_fc/tfc_io.c
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@@ -65,7 +65,6 @@
int ft_queue_data_in(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct se_transport_task *task;
struct fc_frame *fp = NULL;
struct fc_exch *ep;
struct fc_lport *lport;
@@ -90,14 +89,13 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
lport = ep->lp;
cmd->seq = lport->tt.seq_start_next(cmd->seq);
task = &se_cmd->t_task;
remaining = se_cmd->data_length;
/*
* Setup to use first mem list entry if any.
*/
if (task->t_tasks_se_num) {
mem = list_first_entry(&task->t_mem_list,
if (se_cmd->t_tasks_se_num) {
mem = list_first_entry(&se_cmd->t_mem_list,
struct se_mem, se_list);
mem_len = mem->se_len;
mem_off = mem->se_off;
@@ -148,8 +146,8 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
if (use_sg) {
if (!mem) {
BUG_ON(!task->t_task_buf);
page_addr = task->t_task_buf + mem_off;
BUG_ON(!se_cmd->t_task_buf);
page_addr = se_cmd->t_task_buf + mem_off;
/*
* In this case, offset is 'offset_in_page' of
* (t_task_buf + mem_off) instead of 'mem_off'.
@@ -180,7 +178,7 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
kunmap_atomic(page_addr, KM_SOFTIRQ0);
to += tlen;
} else {
from = task->t_task_buf + mem_off;
from = se_cmd->t_task_buf + mem_off;
memcpy(to, from, tlen);
to += tlen;
}
@@ -220,7 +218,6 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
struct fc_seq *seq = cmd->seq;
struct fc_exch *ep;
struct fc_lport *lport;
struct se_transport_task *task;
struct fc_frame_header *fh;
struct se_mem *mem;
u32 mem_off;
@@ -235,8 +232,6 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
u32 f_ctl;
void *buf;
task = &se_cmd->t_task;
fh = fc_frame_header_get(fp);
if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
goto drop;
@@ -312,8 +307,8 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
/*
* Setup to use first mem list entry if any.
*/
if (task->t_tasks_se_num) {
mem = list_first_entry(&task->t_mem_list,
if (se_cmd->t_tasks_se_num) {
mem = list_first_entry(&se_cmd->t_mem_list,
struct se_mem, se_list);
mem_len = mem->se_len;
mem_off = mem->se_off;
@@ -355,7 +350,7 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
memcpy(to, from, tlen);
kunmap_atomic(page_addr, KM_SOFTIRQ0);
} else {
to = task->t_task_buf + mem_off;
to = se_cmd->t_task_buf + mem_off;
memcpy(to, from, tlen);
}
from += tlen;