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IB/hfi1: Refactor hfi_user_exp_rcv_invalid() IOCTLs 

The IOCTL is a bit unwieldy.  Refactor to a common pattern.
Refactor _TID_INVAL_READ IOCTLs.

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 07:04:29 -07:00 committed by Doug Ledford
parent 3920eef7a7
commit 8a41da09e6
2 changed files with 40 additions and 17 deletions
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54
drivers/infiniband/hw/hfi1/file_ops.c
View File

@ -90,6 +90,8 @@ static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg,
u32 len); u32 len);
static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg, static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg,
u32 len); u32 len);
static int user_exp_rcv_invalid(struct hfi1_filedata *fd, unsigned long arg,
u32 len);
static int setup_base_ctxt(struct hfi1_filedata *fd, static int setup_base_ctxt(struct hfi1_filedata *fd,
struct hfi1_ctxtdata *uctxt); struct hfi1_ctxtdata *uctxt);
static int setup_subctxt(struct hfi1_ctxtdata *uctxt); static int setup_subctxt(struct hfi1_ctxtdata *uctxt);
@ -223,9 +225,7 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
{ {
struct hfi1_filedata *fd = fp->private_data; struct hfi1_filedata *fd = fp->private_data;
struct hfi1_ctxtdata *uctxt = fd->uctxt; struct hfi1_ctxtdata *uctxt = fd->uctxt;
struct hfi1_tid_info tinfo;
int ret = 0; int ret = 0;
unsigned long addr;
int uval = 0; int uval = 0;
unsigned long ul_uval = 0; unsigned long ul_uval = 0;
u16 uval16 = 0; u16 uval16 = 0;
@ -263,18 +263,7 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
break; break;
case HFI1_IOCTL_TID_INVAL_READ: case HFI1_IOCTL_TID_INVAL_READ:
if (copy_from_user(&tinfo, ret = user_exp_rcv_invalid(fd, arg, _IOC_SIZE(cmd));
(struct hfi11_tid_info __user *)arg,
sizeof(tinfo)))
return -EFAULT;
ret = hfi1_user_exp_rcv_invalid(fd, &tinfo);
if (ret)
break;
addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
sizeof(tinfo.tidcnt)))
ret = -EFAULT;
break; break;
case HFI1_IOCTL_RECV_CTRL: case HFI1_IOCTL_RECV_CTRL:
@ -1466,6 +1455,43 @@ static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg,
return ret; return ret;
} }
/**
* user_exp_rcv_invalid - Invalidate the given tid rcv list
* @fd: file data of the current driver instance
* @arg: ioctl argumnent for user space information
* @len: length of data structure associated with ioctl command
*
* Wrapper to validate ioctl information before doing _rcv_invalid.
*
*/
static int user_exp_rcv_invalid(struct hfi1_filedata *fd, unsigned long arg,
u32 len)
{
int ret;
unsigned long addr;
struct hfi1_tid_info tinfo;
if (sizeof(tinfo) != len)
return -EINVAL;
if (!fd->invalid_tids)
return -EINVAL;
if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo))))
return -EFAULT;
ret = hfi1_user_exp_rcv_invalid(fd, &tinfo);
if (ret)
return ret;
addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
sizeof(tinfo.tidcnt)))
ret = -EFAULT;
return ret;
}
static unsigned int poll_urgent(struct file *fp, static unsigned int poll_urgent(struct file *fp,
struct poll_table_struct *pt) struct poll_table_struct *pt)
{ {

3
drivers/infiniband/hw/hfi1/user_exp_rcv.c
View File

@ -546,9 +546,6 @@ int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
u32 *array; u32 *array;
int ret = 0; int ret = 0;
if (!fd->invalid_tids)
return -EINVAL;
/* /*
* copy_to_user() can sleep, which will leave the invalid_lock * copy_to_user() can sleep, which will leave the invalid_lock
* locked and cause the MMU notifier to be blocked on the lock * locked and cause the MMU notifier to be blocked on the lock