IBV_OPEN_XRCD(3)					  Libibverbs Programmer's Manual					  IBV_OPEN_XRCD(3)

NAME

       ibv_open_xrcd, ibv_close_xrcd - open or close an XRC protection domain (XRCDs)

SYNOPSIS

       #include <infiniband/verbs.h>

       struct ibv_xrcd *ibv_open_xrcd(struct ibv_context *context,
				      struct ibv_xrcd_init_attr *xrcd_init_attr);

       int ibv_close_xrcd(struct ibv_xrcd *xrcd);

DESCRIPTION

       ibv_open_xrcd()	open  an  XRC  domain  for  the  RDMA device context context xrcd_init_attr is an ibv_xrcd_init_attr struct, as defined in
       <infiniband/verbs.h>.

       struct ibv_xrcd_init_attr {
	       uint32_t 	comp_mask;  /* Identifies valid fields */
	       int		fd;
	       int		oflag;

       fd is the file descriptor to associate with the XRCD.  oflag describes the desired creation attributes.	It is a bitwise OR of zero or more
       of the following flags:

       O_CREAT
	      Indicates  that  an  XRCD should be created and associated with the inode referenced by the given fd.  If the XRCD exists, this flag
	      has no effect except as noted under O_EXCL below.

       O_EXCL If O_EXCL and O_CREAT are set, open will fail if an XRCD associated with the inode exists.

       If fd equals -1, no inode is associated with the XRCD. To indicate that XRCD should be created, use oflag = O_CREAT.

       ibv_close_xrcd() closes the XRCD xrcd.  If this is the last reference, the XRCD will be destroyed.

RETURN VALUE

       ibv_open_xrcd() returns a pointer to the opened XRCD, or NULL if the request fails.

       ibv_close_xrcd() returns 0 on success, or the value of errno on failure (which indicates the failure reason).

NOTES

       ibv_close_xrcd() may fail if any other resource is still associated with the XRCD being closed.

SEE ALSO

       ibv_create_srq_ex(3), ibv_create_qp_ex(3),

AUTHORS

       Sean Hefty <sean.hefty@intel.com>

libibverbs							    2011-06-17							  IBV_OPEN_XRCD(3)