diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2015-03-30 14:34:48 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2015-03-31 09:52:52 -0400 |
| commit | 6814baead86b5d44096ddfbb6f944163578e68c3 (patch) | |
| tree | 56dbce03517cd92027741bcdf6ca24fb929700c0 /net/sunrpc/xprtrdma/frwr_ops.c | |
| parent | 9c1b4d775f2d7dd5bb806e3de2f3e1244a7cbd16 (diff) | |
| download | lwn-6814baead86b5d44096ddfbb6f944163578e68c3.tar.gz lwn-6814baead86b5d44096ddfbb6f944163578e68c3.zip | |
xprtrdma: Add a "deregister_external" op for each memreg mode
There is very little common processing among the different external
memory deregistration functions.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <Devesh.Sharma@Emulex.Com>
Tested-by: Meghana Cheripady <Meghana.Cheripady@Emulex.Com>
Tested-by: Veeresh U. Kokatnur <veereshuk@chelsio.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/frwr_ops.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/frwr_ops.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 23e4d99a2097..35b725bf0afb 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -110,8 +110,44 @@ out_senderr: return rc; } +/* Post a LOCAL_INV Work Request to prevent further remote access + * via RDMA READ or RDMA WRITE. + */ +static int +frwr_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) +{ + struct rpcrdma_mr_seg *seg1 = seg; + struct rpcrdma_ia *ia = &r_xprt->rx_ia; + struct ib_send_wr invalidate_wr, *bad_wr; + int rc, nsegs = seg->mr_nsegs; + + seg1->rl_mw->r.frmr.fr_state = FRMR_IS_INVALID; + + memset(&invalidate_wr, 0, sizeof(invalidate_wr)); + invalidate_wr.wr_id = (unsigned long)(void *)seg1->rl_mw; + invalidate_wr.opcode = IB_WR_LOCAL_INV; + invalidate_wr.ex.invalidate_rkey = seg1->rl_mw->r.frmr.fr_mr->rkey; + DECR_CQCOUNT(&r_xprt->rx_ep); + + read_lock(&ia->ri_qplock); + while (seg1->mr_nsegs--) + rpcrdma_unmap_one(ia, seg++); + rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); + read_unlock(&ia->ri_qplock); + if (rc) + goto out_err; + return nsegs; + +out_err: + /* Force rpcrdma_buffer_get() to retry */ + seg1->rl_mw->r.frmr.fr_state = FRMR_IS_STALE; + dprintk("RPC: %s: ib_post_send status %i\n", __func__, rc); + return nsegs; +} + const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops = { .ro_map = frwr_op_map, + .ro_unmap = frwr_op_unmap, .ro_maxpages = frwr_op_maxpages, .ro_displayname = "frwr", }; |