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Date: Tue, 7 Apr 2015 11:18:37 -0600
From: Jens Axboe <axboe@...com>
To: <axboe@...nel.dk>, <linux-kernel@...r.kernel.org>,
<linux-scsi@...r.kernel.org>
CC: <hch@....de>, Jens Axboe <axboe@...com>
Subject: [PATCH 3/6] mpt2sas: get rid of MPI2_FUNCTION_SCSI_TASK_MGMT
This involves a lot of nasty lookup of a specific running command,
across the host. If anybody is using this code, it should be moved
to proper error handling instead.
Signed-off-by: Jens Axboe <axboe@...com>
---
drivers/scsi/mpt2sas/mpt2sas_ctl.c | 126 +++----------------------------------
1 file changed, 10 insertions(+), 116 deletions(-)
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index 4e509604b571..dd777e53298d 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -530,84 +530,6 @@ _ctl_poll(struct file *filep, poll_table *wait)
}
/**
- * _ctl_set_task_mid - assign an active smid to tm request
- * @ioc: per adapter object
- * @karg - (struct mpt2_ioctl_command)
- * @tm_request - pointer to mf from user space
- *
- * Returns 0 when an smid if found, else fail.
- * during failure, the reply frame is filled.
- */
-static int
-_ctl_set_task_mid(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command *karg,
- Mpi2SCSITaskManagementRequest_t *tm_request)
-{
- u8 found = 0;
- u16 i;
- u16 handle;
- struct scsi_cmnd *scmd;
- struct MPT2SAS_DEVICE *priv_data;
- unsigned long flags;
- Mpi2SCSITaskManagementReply_t *tm_reply;
- u32 sz;
- u32 lun;
- char *desc = NULL;
-
- if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
- desc = "abort_task";
- else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
- desc = "query_task";
- else
- return 0;
-
- lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
-
- handle = le16_to_cpu(tm_request->DevHandle);
- spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
- for (i = ioc->scsiio_depth; i && !found; i--) {
- scmd = ioc->scsi_lookup[i - 1].scmd;
- if (scmd == NULL || scmd->device == NULL ||
- scmd->device->hostdata == NULL)
- continue;
- if (lun != scmd->device->lun)
- continue;
- priv_data = scmd->device->hostdata;
- if (priv_data->sas_target == NULL)
- continue;
- if (priv_data->sas_target->handle != handle)
- continue;
- tm_request->TaskMID = cpu_to_le16(ioc->scsi_lookup[i - 1].smid);
- found = 1;
- }
- spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
-
- if (!found) {
- dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
- "handle(0x%04x), lun(%d), no active mid!!\n", ioc->name,
- desc, le16_to_cpu(tm_request->DevHandle), lun));
- tm_reply = ioc->ctl_cmds.reply;
- tm_reply->DevHandle = tm_request->DevHandle;
- tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
- tm_reply->TaskType = tm_request->TaskType;
- tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
- tm_reply->VP_ID = tm_request->VP_ID;
- tm_reply->VF_ID = tm_request->VF_ID;
- sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
- if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
- sz))
- printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
- __LINE__, __func__);
- return 1;
- }
-
- dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
- "handle(0x%04x), lun(%d), task_mid(%d)\n", ioc->name,
- desc, le16_to_cpu(tm_request->DevHandle), lun,
- le16_to_cpu(tm_request->TaskMID)));
- return 0;
-}
-
-/**
* _ctl_do_mpt_command - main handler for MPT2COMMAND opcode
* @ioc: per adapter object
* @karg - (struct mpt2_ioctl_command)
@@ -689,22 +611,18 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command karg,
}
if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
- smid = mpt2sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
- if (!smid) {
- printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
- ioc->name, __func__);
- ret = -EAGAIN;
- goto out;
- }
- } else {
+ printk(MPT2SAS_ERR_FMT "%s: ignoring "
+ "MPI2_FUNCTION_SCSI_TASK_MGMT\n", ioc->name, __func__);
+ ret = -EINVAL;
+ goto out;
+ }
- smid = mpt2sas_base_get_smid_scsiio(ioc, ioc->ctl_cb_idx, NULL);
- if (!smid) {
- printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
+ smid = mpt2sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
+ if (!smid) {
+ printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
ioc->name, __func__);
- ret = -EAGAIN;
- goto out;
- }
+ ret = -EAGAIN;
+ goto out;
}
ret = 0;
@@ -822,30 +740,6 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command karg,
mpt2sas_base_put_smid_default(ioc, smid);
break;
}
- case MPI2_FUNCTION_SCSI_TASK_MGMT:
- {
- Mpi2SCSITaskManagementRequest_t *tm_request =
- (Mpi2SCSITaskManagementRequest_t *)request;
-
- dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
- "handle(0x%04x), task_type(0x%02x)\n", ioc->name,
- le16_to_cpu(tm_request->DevHandle), tm_request->TaskType));
-
- if (tm_request->TaskType ==
- MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
- tm_request->TaskType ==
- MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
- if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
- mpt2sas_base_free_smid(ioc, smid);
- goto out;
- }
- }
-
- mpt2sas_scsih_set_tm_flag(ioc, le16_to_cpu(
- tm_request->DevHandle));
- mpt2sas_base_put_smid_hi_priority(ioc, smid);
- break;
- }
case MPI2_FUNCTION_SMP_PASSTHROUGH:
{
Mpi2SmpPassthroughRequest_t *smp_request =
--
1.9.1
--
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