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/fmr_ops.c | |
| parent | 9c1b4d775f2d7dd5bb806e3de2f3e1244a7cbd16 (diff) | |
| download | talos-obmc-linux-6814baead86b5d44096ddfbb6f944163578e68c3.tar.gz talos-obmc-linux-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/fmr_ops.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/fmr_ops.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index 45fb646a6d36..888aa107cf0b 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -79,8 +79,35 @@ out_maperr: return rc; } +/* Use the ib_unmap_fmr() verb to prevent further remote + * access via RDMA READ or RDMA WRITE. + */ +static int +fmr_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) +{ + struct rpcrdma_ia *ia = &r_xprt->rx_ia; + struct rpcrdma_mr_seg *seg1 = seg; + int rc, nsegs = seg->mr_nsegs; + LIST_HEAD(l); + + list_add(&seg1->rl_mw->r.fmr->list, &l); + rc = ib_unmap_fmr(&l); + read_lock(&ia->ri_qplock); + while (seg1->mr_nsegs--) + rpcrdma_unmap_one(ia, seg++); + read_unlock(&ia->ri_qplock); + if (rc) + goto out_err; + return nsegs; + +out_err: + dprintk("RPC: %s: ib_unmap_fmr status %i\n", __func__, rc); + return nsegs; +} + const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = { .ro_map = fmr_op_map, + .ro_unmap = fmr_op_unmap, .ro_maxpages = fmr_op_maxpages, .ro_displayname = "fmr", }; |
