}
EXPORT_SYMBOL(scsi_do_req);
-static void scsi_wait_done(struct scsi_cmnd *cmd)
-{
- struct request *req = cmd->request;
- struct request_queue *q = cmd->device->request_queue;
- unsigned long flags;
-
- req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */
-
- spin_lock_irqsave(q->queue_lock, flags);
- if (blk_rq_tagged(req))
- blk_queue_end_tag(q, req);
- spin_unlock_irqrestore(q->queue_lock, flags);
-
- if (req->waiting)
- complete(req->waiting);
-}
-
/* This is the end routine we get to if a command was never attached
* to the request. Simply complete the request without changing
* rq_status; this will cause a DRIVER_ERROR. */
unsigned bufflen, int timeout, int retries)
{
DECLARE_COMPLETION(wait);
-
- sreq->sr_request->waiting = &wait;
- sreq->sr_request->rq_status = RQ_SCSI_BUSY;
- sreq->sr_request->end_io = scsi_wait_req_end_io;
- scsi_do_req(sreq, cmnd, buffer, bufflen, scsi_wait_done,
- timeout, retries);
+ int write = (sreq->sr_data_direction == DMA_TO_DEVICE);
+ struct request *req;
+
+ req = blk_get_request(sreq->sr_device->request_queue, write,
+ __GFP_WAIT);
+ if (bufflen && blk_rq_map_kern(sreq->sr_device->request_queue, req,
+ buffer, bufflen, __GFP_WAIT)) {
+ sreq->sr_result = DRIVER_ERROR << 24;
+ blk_put_request(req);
+ return;
+ }
+
+ req->flags |= REQ_NOMERGE;
+ req->waiting = &wait;
+ req->end_io = scsi_wait_req_end_io;
+ req->cmd_len = COMMAND_SIZE(((u8 *)cmnd)[0]);
+ req->sense = sreq->sr_sense_buffer;
+ req->sense_len = 0;
+ memcpy(req->cmd, cmnd, req->cmd_len);
+ req->timeout = timeout;
+ req->flags |= REQ_BLOCK_PC;
+ req->rq_disk = NULL;
+ blk_insert_request(sreq->sr_device->request_queue, req,
+ sreq->sr_data_direction == DMA_TO_DEVICE, NULL);
wait_for_completion(&wait);
sreq->sr_request->waiting = NULL;
- if (sreq->sr_request->rq_status != RQ_SCSI_DONE)
+ sreq->sr_result = req->errors;
+ if (req->errors)
sreq->sr_result |= (DRIVER_ERROR << 24);
- __scsi_release_request(sreq);
+ blk_put_request(req);
}
+
EXPORT_SYMBOL(scsi_wait_req);
+/**
+ * scsi_execute_req - insert request and wait for the result
+ * @sdev: scsi device
+ * @cmd: scsi command
+ * @data_direction: data direction
+ * @buffer: data buffer
+ * @bufflen: len of buffer
+ * @sense: optional sense buffer
+ * @timeout: request timeout in seconds
+ * @retries: number of times to retry request
+ *
+ * scsi_execute_req returns the req->errors value which is the
+ * the scsi_cmnd result field.
+ **/
+int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
+ int data_direction, void *buffer, unsigned bufflen,
+ unsigned char *sense, int timeout, int retries)
+{
+ struct request *req;
+ int write = (data_direction == DMA_TO_DEVICE);
+ int ret = DRIVER_ERROR << 24;
+
+ req = blk_get_request(sdev->request_queue, write, __GFP_WAIT);
+
+ if (bufflen && blk_rq_map_kern(sdev->request_queue, req,
+ buffer, bufflen, __GFP_WAIT))
+ goto out;
+
+ req->cmd_len = COMMAND_SIZE(cmd[0]);
+ memcpy(req->cmd, cmd, req->cmd_len);
+ req->sense = sense;
+ req->sense_len = 0;
+ req->timeout = timeout;
+ req->flags |= REQ_BLOCK_PC | REQ_SPECIAL;
+
+ /*
+ * head injection *required* here otherwise quiesce won't work
+ */
+ blk_execute_rq(req->q, NULL, req, 1);
+
+ ret = req->errors;
+ out:
+ blk_put_request(req);
+
+ return ret;
+}
+
+EXPORT_SYMBOL(scsi_execute_req);
+
/*
* Function: scsi_init_cmd_errh()
*
spin_lock_irqsave(shost->host_lock, flags);
shost->host_busy--;
- if (unlikely(test_bit(SHOST_RECOVERY, &shost->shost_state) &&
+ if (unlikely((shost->shost_state == SHOST_RECOVERY) &&
shost->host_failed))
scsi_eh_wakeup(shost);
spin_unlock(shost->host_lock);
return;
}
if (result) {
- printk(KERN_INFO "SCSI error : <%d %d %d %d> return code "
- "= 0x%x\n", cmd->device->host->host_no,
- cmd->device->channel,
- cmd->device->id,
- cmd->device->lun, result);
+ if (!(req->flags & REQ_SPECIAL))
+ printk(KERN_INFO "SCSI error : <%d %d %d %d> return code "
+ "= 0x%x\n", cmd->device->host->host_no,
+ cmd->device->channel,
+ cmd->device->id,
+ cmd->device->lun, result);
if (driver_byte(result) & DRIVER_SENSE)
scsi_print_sense("", cmd);
return -EOPNOTSUPP;
}
+static void scsi_generic_done(struct scsi_cmnd *cmd)
+{
+ BUG_ON(!blk_pc_request(cmd->request));
+ scsi_io_completion(cmd, cmd->result == 0 ? cmd->bufflen : 0, 0);
+}
+
static int scsi_prep_fn(struct request_queue *q, struct request *req)
{
struct scsi_device *sdev = q->queuedata;
* these two cases differently. We differentiate by looking
* at request->cmd, as this tells us the real story.
*/
- if (req->flags & REQ_SPECIAL) {
+ if (req->flags & REQ_SPECIAL && req->special) {
struct scsi_request *sreq = req->special;
if (sreq->sr_magic == SCSI_REQ_MAGIC) {
cmd = req->special;
} else if (req->flags & (REQ_CMD | REQ_BLOCK_PC)) {
- if(unlikely(specials_only)) {
+ if(unlikely(specials_only) && !(req->flags & REQ_SPECIAL)) {
if(specials_only == SDEV_QUIESCE ||
specials_only == SDEV_BLOCK)
return BLKPREP_DEFER;
/*
* Initialize the actual SCSI command for this request.
*/
- drv = *(struct scsi_driver **)req->rq_disk->private_data;
- if (unlikely(!drv->init_command(cmd))) {
- scsi_release_buffers(cmd);
- scsi_put_command(cmd);
- return BLKPREP_KILL;
+ if (req->rq_disk) {
+ drv = *(struct scsi_driver **)req->rq_disk->private_data;
+ if (unlikely(!drv->init_command(cmd))) {
+ scsi_release_buffers(cmd);
+ scsi_put_command(cmd);
+ return BLKPREP_KILL;
+ }
+ } else {
+ memcpy(cmd->cmnd, req->cmd, sizeof(cmd->cmnd));
+ if (rq_data_dir(req) == WRITE)
+ cmd->sc_data_direction = DMA_TO_DEVICE;
+ else if (req->data_len)
+ cmd->sc_data_direction = DMA_FROM_DEVICE;
+ else
+ cmd->sc_data_direction = DMA_NONE;
+
+ cmd->transfersize = req->data_len;
+ cmd->allowed = 3;
+ cmd->timeout_per_command = req->timeout;
+ cmd->done = scsi_generic_done;
}
}
struct Scsi_Host *shost,
struct scsi_device *sdev)
{
- if (test_bit(SHOST_RECOVERY, &shost->shost_state))
+ if (shost->shost_state == SHOST_RECOVERY)
return 0;
if (shost->host_busy == 0 && shost->host_blocked) {
/*
git.samba.org / sfrench / cifs-2.6.git / blobdiff