diff options
| author |   Christoph Hellwig <hch@lst.de> | 2022-02-24 18:55:47 +0100 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2022-03-01 22:21:49 -0500 |
| commit | ce70fd9a551af7424a7dace2a1ba05a7de8eae27 (patch) | |
| tree | c074d0b72237150c6657b632325917f28b1a827a /drivers/target | |
| parent | scsi: core: Don't memset() the entire scsi_cmnd in scsi_init_command() (diff) | |
| download | linux-dev-ce70fd9a551af7424a7dace2a1ba05a7de8eae27.tar.xz linux-dev-ce70fd9a551af7424a7dace2a1ba05a7de8eae27.zip | |
scsi: core: Remove the cmd field from struct scsi_request
Now that each scsi_request is backed by a scsi_cmnd, there is no need to
indirect the CDB storage. Change all submitters of SCSI passthrough
requests to store the CDB information directly in the scsi_cmnd, and while
doing so allocate the full 32 bytes that cover all Linux supported SCSI
hosts instead of requiring dynamic allocation for > 16 byte CDBs. On
64-bit systems this does not change the size of the scsi_cmnd at all, while
on 32-bit systems it slightly increases it for now, but that increase will
be made up by the removal of the remaining scsi_request fields.
Link: https://lore.kernel.org/r/20220224175552.988286-4-hch@lst.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_pscsi.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 622158ed5d9c..0a8078db923d 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -961,6 +961,7 @@ pscsi_execute_cmd(struct se_cmd *cmd) struct scatterlist *sgl = cmd->t_data_sg; u32 sgl_nents = cmd->t_data_nents; struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); + struct scsi_cmnd *scmd; struct request *req; sense_reason_t ret; @@ -978,12 +979,15 @@ pscsi_execute_cmd(struct se_cmd *cmd) req->end_io = pscsi_req_done; req->end_io_data = cmd; - scsi_req(req)->cmd_len = scsi_command_size(cmd->t_task_cdb); - if (scsi_req(req)->cmd_len > BLK_MAX_CDB) { + + scmd = blk_mq_rq_to_pdu(req); + scmd->cmd_len = scsi_command_size(cmd->t_task_cdb); + if (scmd->cmd_len > sizeof(scmd->cmnd)) { ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; goto fail_put_request; } - memcpy(scsi_req(req)->cmd, cmd->t_task_cdb, scsi_req(req)->cmd_len); + memcpy(scmd->cmnd, cmd->t_task_cdb, scmd->cmd_len); + if (pdv->pdv_sd->type == TYPE_DISK || pdv->pdv_sd->type == TYPE_ZBC) req->timeout = PS_TIMEOUT_DISK; @@ -991,7 +995,7 @@ pscsi_execute_cmd(struct se_cmd *cmd) req->timeout = PS_TIMEOUT_OTHER; scsi_req(req)->retries = PS_RETRY; - cmd->priv = scsi_req(req)->cmd; + cmd->priv = scmd->cmnd; blk_execute_rq_nowait(req, cmd->sam_task_attr == TCM_HEAD_TAG, pscsi_req_done); |