diff options
author | Christoph Hellwig <hch@infradead.org> | 2012-04-24 00:25:06 -0400 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-05-06 15:11:26 -0700 |
commit | 5787cacd0bd5ee016ad807b244550d34fe2beebe (patch) | |
tree | d9303fd0c5767f945c13dfc34eb0b16a4f4d2730 /drivers/target/target_core_pscsi.c | |
parent | cf572a9627c9ae86082216de109780c1d2e2ee28 (diff) | |
download | linux-5787cacd0bd5ee016ad807b244550d34fe2beebe.tar.gz linux-5787cacd0bd5ee016ad807b244550d34fe2beebe.tar.bz2 linux-5787cacd0bd5ee016ad807b244550d34fe2beebe.zip |
target: remove struct se_task
We can use struct se_cmd for everything it did. Make sure to pass the S/G
list and data direction to the execution function to ease adding back BIDI
support later on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_pscsi.c')
-rw-r--r-- | drivers/target/target_core_pscsi.c | 172 |
1 files changed, 61 insertions, 111 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 46eb017287a6..4ce2cf642fce 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -663,22 +663,12 @@ static void pscsi_free_device(void *p) kfree(pdv); } -static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task) +static int pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg) { - return container_of(task, struct pscsi_plugin_task, pscsi_task); -} - - -/* pscsi_transport_complete(): - * - * - */ -static int pscsi_transport_complete(struct se_task *task) -{ - struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; + struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; struct scsi_device *sd = pdv->pdv_sd; int result; - struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_plugin_task *pt = cmd->priv; unsigned char *cdb = &pt->pscsi_cdb[0]; result = pt->pscsi_result; @@ -688,12 +678,11 @@ static int pscsi_transport_complete(struct se_task *task) */ if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && (status_byte(result) << 1) == SAM_STAT_GOOD) { - if (!task->task_se_cmd->se_deve) + if (!cmd->se_deve) goto after_mode_sense; - if (task->task_se_cmd->se_deve->lun_flags & - TRANSPORT_LUNFLAGS_READ_ONLY) { - unsigned char *buf = transport_kmap_data_sg(task->task_se_cmd); + if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { + unsigned char *buf = transport_kmap_data_sg(cmd); if (cdb[0] == MODE_SENSE_10) { if (!(buf[3] & 0x80)) @@ -703,7 +692,7 @@ static int pscsi_transport_complete(struct se_task *task) buf[2] |= 0x80; } - transport_kunmap_data_sg(task->task_se_cmd); + transport_kunmap_data_sg(cmd); } } after_mode_sense: @@ -722,7 +711,6 @@ after_mode_sense: if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && (status_byte(result) << 1) == SAM_STAT_GOOD) { unsigned char *buf; - struct scatterlist *sg = task->task_sg; u16 bdl; u32 blocksize; @@ -757,35 +745,6 @@ after_mode_select: return 0; } -static struct se_task * -pscsi_alloc_task(unsigned char *cdb) -{ - struct pscsi_plugin_task *pt; - - /* - * Dynamically alloc cdb space, since it may be larger than - * TCM_MAX_COMMAND_SIZE - */ - pt = kzalloc(sizeof(*pt) + scsi_command_size(cdb), GFP_KERNEL); - if (!pt) { - pr_err("Unable to allocate struct pscsi_plugin_task\n"); - return NULL; - } - - return &pt->pscsi_task; -} - -static void pscsi_free_task(struct se_task *task) -{ - struct pscsi_plugin_task *pt = PSCSI_TASK(task); - - /* - * We do not release the bio(s) here associated with this task, as - * this is handled by bio_put() and pscsi_bi_endio(). - */ - kfree(pt); -} - enum { Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, Opt_scsi_lun_id, Opt_err @@ -958,26 +917,25 @@ static inline struct bio *pscsi_get_bio(int sg_num) return bio; } -static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg, +static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, + u32 sgl_nents, enum dma_data_direction data_direction, struct bio **hbio) { - struct se_cmd *cmd = task->task_se_cmd; - struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; - u32 task_sg_num = task->task_sg_nents; + struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; struct bio *bio = NULL, *tbio = NULL; struct page *page; struct scatterlist *sg; u32 data_len = cmd->data_length, i, len, bytes, off; - int nr_pages = (cmd->data_length + task_sg[0].offset + + int nr_pages = (cmd->data_length + sgl[0].offset + PAGE_SIZE - 1) >> PAGE_SHIFT; int nr_vecs = 0, rc; - int rw = (task->task_data_direction == DMA_TO_DEVICE); + int rw = (data_direction == DMA_TO_DEVICE); *hbio = NULL; pr_debug("PSCSI: nr_pages: %d\n", nr_pages); - for_each_sg(task_sg, sg, task_sg_num, i) { + for_each_sg(sgl, sg, sgl_nents, i) { page = sg_page(sg); off = sg->offset; len = sg->length; @@ -1009,7 +967,7 @@ static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg, * Set *hbio pointer to handle the case: * nr_pages > BIO_MAX_PAGES, where additional * bios need to be added to complete a given - * struct se_task + * command. */ if (!*hbio) *hbio = tbio = bio; @@ -1049,7 +1007,7 @@ static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg, } } - return task->task_sg_nents; + return sgl_nents; fail: while (*hbio) { bio = *hbio; @@ -1061,53 +1019,61 @@ fail: return -ENOMEM; } -static int pscsi_do_task(struct se_task *task) +static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl, + u32 sgl_nents, enum dma_data_direction data_direction) { - struct se_cmd *cmd = task->task_se_cmd; - struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr; - struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; + struct pscsi_plugin_task *pt; struct request *req; struct bio *hbio; int ret; + /* + * Dynamically alloc cdb space, since it may be larger than + * TCM_MAX_COMMAND_SIZE + */ + pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); + if (!pt) { + cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + return -ENOMEM; + } + cmd->priv = pt; + 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) { + if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { req = blk_get_request(pdv->pdv_sd->request_queue, - (task->task_data_direction == DMA_TO_DEVICE), + (data_direction == DMA_TO_DEVICE), GFP_KERNEL); if (!req || IS_ERR(req)) { pr_err("PSCSI: blk_get_request() failed: %ld\n", req ? IS_ERR(req) : -ENOMEM); cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - return -ENODEV; + goto fail; } } else { BUG_ON(!cmd->data_length); - /* - * Setup the main struct request for the task->task_sg[] payload - */ - ret = pscsi_map_sg(task, task->task_sg, &hbio); + ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); if (ret < 0) { cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - return ret; + goto fail; } req = blk_make_request(pdv->pdv_sd->request_queue, hbio, GFP_KERNEL); if (IS_ERR(req)) { pr_err("pSCSI: blk_make_request() failed\n"); - goto fail; + goto fail_free_bio; } } req->cmd_type = REQ_TYPE_BLOCK_PC; req->end_io = pscsi_req_done; - req->end_io_data = task; + req->end_io_data = cmd; req->cmd_len = scsi_command_size(pt->pscsi_cdb); req->cmd = &pt->pscsi_cdb[0]; req->sense = &pt->pscsi_sense[0]; @@ -1119,12 +1085,12 @@ static int pscsi_do_task(struct se_task *task) req->retries = PS_RETRY; blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, - (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG), + (cmd->sam_task_attr == MSG_HEAD_TAG), pscsi_req_done); return 0; -fail: +fail_free_bio: while (hbio) { struct bio *bio = hbio; hbio = hbio->bi_next; @@ -1132,16 +1098,14 @@ fail: bio_endio(bio, 0); /* XXX: should be error */ } cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; +fail: + kfree(pt); return -ENOMEM; } -/* pscsi_get_sense_buffer(): - * - * - */ -static unsigned char *pscsi_get_sense_buffer(struct se_task *task) +static unsigned char *pscsi_get_sense_buffer(struct se_cmd *cmd) { - struct pscsi_plugin_task *pt = PSCSI_TASK(task); + struct pscsi_plugin_task *pt = cmd->priv; return pt->pscsi_sense; } @@ -1181,48 +1145,36 @@ static sector_t pscsi_get_blocks(struct se_device *dev) return 0; } -/* pscsi_handle_SAM_STATUS_failures(): - * - * - */ -static inline void pscsi_process_SAM_status( - struct se_task *task, - struct pscsi_plugin_task *pt) +static void pscsi_req_done(struct request *req, int uptodate) { - task->task_scsi_status = status_byte(pt->pscsi_result); - if (task->task_scsi_status) { - task->task_scsi_status <<= 1; - pr_debug("PSCSI Status Byte exception at task: %p CDB:" - " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], + struct se_cmd *cmd = req->end_io_data; + struct pscsi_plugin_task *pt = cmd->priv; + + pt->pscsi_result = req->errors; + pt->pscsi_resid = req->resid_len; + + cmd->scsi_status = status_byte(pt->pscsi_result) << 1; + if (cmd->scsi_status) { + pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" + " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], pt->pscsi_result); } switch (host_byte(pt->pscsi_result)) { case DID_OK: - transport_complete_task(task, (!task->task_scsi_status)); + target_complete_cmd(cmd, cmd->scsi_status); break; default: - pr_debug("PSCSI Host Byte exception at task: %p CDB:" - " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0], + pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" + " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], pt->pscsi_result); - task->task_scsi_status = SAM_STAT_CHECK_CONDITION; - task->task_se_cmd->scsi_sense_reason = - TCM_UNSUPPORTED_SCSI_OPCODE; - transport_complete_task(task, 0); + cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; + target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); break; } -} -static void pscsi_req_done(struct request *req, int uptodate) -{ - struct se_task *task = req->end_io_data; - struct pscsi_plugin_task *pt = PSCSI_TASK(task); - - pt->pscsi_result = req->errors; - pt->pscsi_resid = req->resid_len; - - pscsi_process_SAM_status(task, pt); __blk_put_request(req->q, req); + kfree(pt); } static struct se_subsystem_api pscsi_template = { @@ -1236,9 +1188,7 @@ static struct se_subsystem_api pscsi_template = { .create_virtdevice = pscsi_create_virtdevice, .free_device = pscsi_free_device, .transport_complete = pscsi_transport_complete, - .alloc_task = pscsi_alloc_task, - .do_task = pscsi_do_task, - .free_task = pscsi_free_task, + .execute_cmd = pscsi_execute_cmd, .check_configfs_dev_params = pscsi_check_configfs_dev_params, .set_configfs_dev_params = pscsi_set_configfs_dev_params, .show_configfs_dev_params = pscsi_show_configfs_dev_params, |