diff options
| author | Andy Grover <andy.grover@oracle.com> | 2009-10-30 11:54:53 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-31 01:06:37 +0300 |
| commit | 244546f0d3101c5441f5b14cfe8a79d62679eaea (patch) | |
| tree | 52ba3f802e695e6b052aeb3c38ae76fb5f5f0be6 /net/rds/rdma.c | |
| parent | 6639104bd826e0b1388c69a6b7564fffc636c8a8 (diff) | |
| download | linux-244546f0d3101c5441f5b14cfe8a79d62679eaea.tar.xz | |
RDS: Add GET_MR_FOR_DEST sockopt
RDS currently supports a GET_MR sockopt to establish a
memory region (MR) for a chunk of memory. However, the fastreg
method ties a MR to a particular destination. The GET_MR_FOR_DEST
sockopt allows the remote machine to be specified, and thus
support for fastreg (aka FRWRs).
Note that this patch does *not* do all of this - it simply
implements the new sockopt in terms of the old one, so applications
can begin to use the new sockopt in preparation for cutover to
FRWRs.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/rdma.c')
| -rw-r--r-- | net/rds/rdma.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 8dc83d2caa58..971b5a668458 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -317,6 +317,30 @@ int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen) return __rds_rdma_map(rs, &args, NULL, NULL); } +int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen) +{ + struct rds_get_mr_for_dest_args args; + struct rds_get_mr_args new_args; + + if (optlen != sizeof(struct rds_get_mr_for_dest_args)) + return -EINVAL; + + if (copy_from_user(&args, (struct rds_get_mr_for_dest_args __user *)optval, + sizeof(struct rds_get_mr_for_dest_args))) + return -EFAULT; + + /* + * Initially, just behave like get_mr(). + * TODO: Implement get_mr as wrapper around this + * and deprecate it. + */ + new_args.vec = args.vec; + new_args.cookie_addr = args.cookie_addr; + new_args.flags = args.flags; + + return __rds_rdma_map(rs, &new_args, NULL, NULL); +} + /* * Free the MR indicated by the given R_Key */ |