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target: remove target_get_task_cdb

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Now that tasks are always the same size as the command there is no need
to rewrite a CDB in common code.  Notw that we keep the separately allocated
CDB in the pscsi and stgt backends for now, to easy reintroducing any
command splitting local to these backends if nessecary.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2012-04-23 11:35:29 -04:00 committed by Nicholas Bellinger
parent 32d8d2e430
commit ed3102c678
3 changed files with 2 additions and 52 deletions
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49
drivers/target/target_core_cdb.c
View file

@ -1148,52 +1148,3 @@ int target_emulate_noop(struct se_task *task)
transport_complete_task(task, 1);
return 0;
}
/*
* Write a CDB into @cdb that is based on the one the intiator sent us,
* but updated to only cover the sectors that the current task handles.
*/
void target_get_task_cdb(struct se_task *task, unsigned char *cdb)
{
struct se_cmd *cmd = task->task_se_cmd;
unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb);
memcpy(cdb, cmd->t_task_cdb, cdb_len);
if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
unsigned long long lba = task->task_lba;
u32 sectors = task->task_sectors;
switch (cdb_len) {
case 6:
/* 21-bit LBA and 8-bit sectors */
cdb[1] = (lba >> 16) & 0x1f;
cdb[2] = (lba >> 8) & 0xff;
cdb[3] = lba & 0xff;
cdb[4] = sectors & 0xff;
break;
case 10:
/* 32-bit LBA and 16-bit sectors */
put_unaligned_be32(lba, &cdb[2]);
put_unaligned_be16(sectors, &cdb[7]);
break;
case 12:
/* 32-bit LBA and 32-bit sectors */
put_unaligned_be32(lba, &cdb[2]);
put_unaligned_be32(sectors, &cdb[6]);
break;
case 16:
/* 64-bit LBA and 32-bit sectors */
put_unaligned_be64(lba, &cdb[2]);
put_unaligned_be32(sectors, &cdb[10]);
break;
case 32:
/* 64-bit LBA and 32-bit sectors, extended CDB */
put_unaligned_be64(lba, &cdb[12]);
put_unaligned_be32(sectors, &cdb[28]);
break;
default:
BUG();
}
}
}
EXPORT_SYMBOL(target_get_task_cdb);

3
drivers/target/target_core_pscsi.c
View file

@ -1070,7 +1070,8 @@ static int pscsi_do_task(struct se_task *task)
struct bio *hbio;
int ret;
target_get_task_cdb(task, pt->pscsi_cdb);
memcpy(pt->pscsi_cdb, cmd->t_task_cdb,
scsi_command_size(cmd->t_task_cdb));
if (task->task_se_cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) {
req = blk_get_request(pdv->pdv_sd->request_queue,

2
include/target/target_core_backend.h
View file

@ -51,8 +51,6 @@ struct se_device *transport_add_device_to_core_hba(struct se_hba *,
void transport_complete_sync_cache(struct se_cmd *, int);
void transport_complete_task(struct se_task *, int);
void target_get_task_cdb(struct se_task *, unsigned char *);
void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);