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IB/hfi1: Refactor get_user() IOCTLs

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The IOCTL is a bit unwieldy.  Refactor to a common pattern.
Refactor _RECV_CTRL, _POLL_TYPE, _ACK_EVENT and _SET_PKEY
IOCTLs to a common pattern.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Michael J. Ruhl 2017-09-26 07:04:35 -07:00 committed by Doug Ledford
parent 8a41da09e6
commit 88a69b65f3
1 changed files with 34 additions and 40 deletions
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74
drivers/infiniband/hw/hfi1/file_ops.c
View file

@ -105,10 +105,10 @@ static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt);
static unsigned int poll_urgent(struct file *fp, struct poll_table_struct *pt);
static unsigned int poll_next(struct file *fp, struct poll_table_struct *pt);
static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt,
unsigned long events);
static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, u16 subctxt, u16 pkey);
unsigned long arg);
static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg);
static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
int start_stop);
unsigned long arg);
static int vma_fault(struct vm_fault *vmf);
static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
unsigned long arg);
@ -227,8 +227,6 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
struct hfi1_ctxtdata *uctxt = fd->uctxt;
int ret = 0;
int uval = 0;
unsigned long ul_uval = 0;
u16 uval16 = 0;
hfi1_cdbg(IOCTL, "IOCTL recv: 0x%x", cmd);
if (cmd != HFI1_IOCTL_ASSIGN_CTXT &&
@ -267,34 +265,21 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
break;
case HFI1_IOCTL_RECV_CTRL:
ret = get_user(uval, (int __user *)arg);
if (ret != 0)
return -EFAULT;
ret = manage_rcvq(uctxt, fd->subctxt, uval);
ret = manage_rcvq(uctxt, fd->subctxt, arg);
break;
case HFI1_IOCTL_POLL_TYPE:
ret = get_user(uval, (int __user *)arg);
if (ret != 0)
if (get_user(uval, (int __user *)arg))
return -EFAULT;
uctxt->poll_type = (typeof(uctxt->poll_type))uval;
break;
case HFI1_IOCTL_ACK_EVENT:
ret = get_user(ul_uval, (unsigned long __user *)arg);
if (ret != 0)
return -EFAULT;
ret = user_event_ack(uctxt, fd->subctxt, ul_uval);
ret = user_event_ack(uctxt, fd->subctxt, arg);
break;
case HFI1_IOCTL_SET_PKEY:
ret = get_user(uval16, (u16 __user *)arg);
if (ret != 0)
return -EFAULT;
if (HFI1_CAP_IS_USET(PKEY_CHECK))
ret = set_ctxt_pkey(uctxt, fd->subctxt, uval16);
else
return -EPERM;
ret = set_ctxt_pkey(uctxt, arg);
break;
case HFI1_IOCTL_CTXT_RESET: {
@ -1584,13 +1569,18 @@ int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit)
* re-init the software copy of the head register
*/
static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
int start_stop)
unsigned long arg)
{
struct hfi1_devdata *dd = uctxt->dd;
unsigned int rcvctrl_op;
int start_stop;
if (subctxt)
goto bail;
return 0;
if (get_user(start_stop, (int __user *)arg))
return -EFAULT;
/* atomically clear receive enable ctxt. */
if (start_stop) {
/*
@ -1609,7 +1599,7 @@ static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
}
hfi1_rcvctrl(dd, rcvctrl_op, uctxt);
/* always; new head should be equal to new tail; see above */
bail:
return 0;
}
@ -1619,15 +1609,19 @@ static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
* set, if desired, and checks again in future.
*/
static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt,
unsigned long events)
unsigned long arg)
{
int i;
struct hfi1_devdata *dd = uctxt->dd;
unsigned long *evs;
unsigned long events;
if (!dd->events)
return 0;
if (get_user(events, (unsigned long __user *)arg))
return -EFAULT;
evs = dd->events + uctxt_offset(uctxt) + subctxt;
for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) {
@ -1638,27 +1632,27 @@ static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt,
return 0;
}
static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, u16 subctxt, u16 pkey)
static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg)
{
int ret = -ENOENT, i, intable = 0;
int i;
struct hfi1_pportdata *ppd = uctxt->ppd;
struct hfi1_devdata *dd = uctxt->dd;
u16 pkey;
if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) {
ret = -EINVAL;
goto done;
}
if (!HFI1_CAP_IS_USET(PKEY_CHECK))
return -EPERM;
if (get_user(pkey, (u16 __user *)arg))
return -EFAULT;
if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++)
if (pkey == ppd->pkeys[i]) {
intable = 1;
break;
}
if (pkey == ppd->pkeys[i])
return hfi1_set_ctxt_pkey(dd, uctxt, pkey);
if (intable)
ret = hfi1_set_ctxt_pkey(dd, uctxt, pkey);
done:
return ret;
return -ENOENT;
}
static void user_remove(struct hfi1_devdata *dd)