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xprtrdma: Update rkeys after transport reconnect 

Various reports of:

  rpcrdma_qp_async_error_upcall: QP error 3 on device mlx4_0
		ep ffff8800bfd3e848

Ensure that rkeys in already-marshalled RPC/RDMA headers are
refreshed after the QP has been replaced by a reconnect.

BugLink: https://bugzilla.linux-nfs.org/show_bug.cgi?id=249
Suggested-by: Selvin Xavier <Selvin.Xavier@Emulex.Com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Shirley Ma <shirley.ma@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
hifive-unleashed-5.1
Chuck Lever 2014-07-29 17:23:43 -04:00 committed by Anna Schumaker
parent 43e9598817
commit 6ab59945f2
3 changed files with 54 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -53,14 +53,6 @@
# define RPCDBG_FACILITY RPCDBG_TRANS
#endif
enum rpcrdma_chunktype {
rpcrdma_noch = 0,
rpcrdma_readch,
rpcrdma_areadch,
rpcrdma_writech,
rpcrdma_replych
};
#ifdef RPC_DEBUG
static const char transfertypes[][12] = {
"pure inline", /* no chunks */
@ -285,6 +277,28 @@ out:
return n;
}
/*
* Marshal chunks. This routine returns the header length
* consumed by marshaling.
*
* Returns positive RPC/RDMA header size, or negative errno.
*/
ssize_t
rpcrdma_marshal_chunks(struct rpc_rqst *rqst, ssize_t result)
{
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
struct rpcrdma_msg *headerp = (struct rpcrdma_msg *)req->rl_base;
if (req->rl_rtype != rpcrdma_noch)
result = rpcrdma_create_chunks(rqst, &rqst->rq_snd_buf,
headerp, req->rl_rtype);
else if (req->rl_wtype != rpcrdma_noch)
result = rpcrdma_create_chunks(rqst, &rqst->rq_rcv_buf,
headerp, req->rl_wtype);
return result;
}
/*
* Copy write data inline.
* This function is used for "small" requests. Data which is passed
@ -377,7 +391,6 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
char *base;
size_t rpclen, padlen;
ssize_t hdrlen;
enum rpcrdma_chunktype rtype, wtype;
struct rpcrdma_msg *headerp;
/*
@ -415,13 +428,13 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
* into pages; otherwise use reply chunks.
*/
if (rqst->rq_rcv_buf.buflen <= RPCRDMA_INLINE_READ_THRESHOLD(rqst))
wtype = rpcrdma_noch;
req->rl_wtype = rpcrdma_noch;
else if (rqst->rq_rcv_buf.page_len == 0)
wtype = rpcrdma_replych;
req->rl_wtype = rpcrdma_replych;
else if (rqst->rq_rcv_buf.flags & XDRBUF_READ)
wtype = rpcrdma_writech;
req->rl_wtype = rpcrdma_writech;
else
wtype = rpcrdma_replych;
req->rl_wtype = rpcrdma_replych;
/*
* Chunks needed for arguments?
@ -438,16 +451,16 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
* TBD check NFSv4 setacl
*/
if (rqst->rq_snd_buf.len <= RPCRDMA_INLINE_WRITE_THRESHOLD(rqst))
rtype = rpcrdma_noch;
req->rl_rtype = rpcrdma_noch;
else if (rqst->rq_snd_buf.page_len == 0)
rtype = rpcrdma_areadch;
req->rl_rtype = rpcrdma_areadch;
else
rtype = rpcrdma_readch;
req->rl_rtype = rpcrdma_readch;
/* The following simplification is not true forever */
if (rtype != rpcrdma_noch && wtype == rpcrdma_replych)
wtype = rpcrdma_noch;
if (rtype != rpcrdma_noch && wtype != rpcrdma_noch) {
if (req->rl_rtype != rpcrdma_noch && req->rl_wtype == rpcrdma_replych)
req->rl_wtype = rpcrdma_noch;
if (req->rl_rtype != rpcrdma_noch && req->rl_wtype != rpcrdma_noch) {
dprintk("RPC: %s: cannot marshal multiple chunk lists\n",
__func__);
return -EIO;
@ -461,7 +474,7 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
* When padding is in use and applies to the transfer, insert
* it and change the message type.
*/
if (rtype == rpcrdma_noch) {
if (req->rl_rtype == rpcrdma_noch) {
padlen = rpcrdma_inline_pullup(rqst,
RPCRDMA_INLINE_PAD_VALUE(rqst));
@ -476,7 +489,7 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
headerp->rm_body.rm_padded.rm_pempty[1] = xdr_zero;
headerp->rm_body.rm_padded.rm_pempty[2] = xdr_zero;
hdrlen += 2 * sizeof(u32); /* extra words in padhdr */
if (wtype != rpcrdma_noch) {
if (req->rl_wtype != rpcrdma_noch) {
dprintk("RPC: %s: invalid chunk list\n",
__func__);
return -EIO;
@ -497,30 +510,18 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
* on receive. Therefore, we request a reply chunk
* for non-writes wherever feasible and efficient.
*/
if (wtype == rpcrdma_noch)
wtype = rpcrdma_replych;
if (req->rl_wtype == rpcrdma_noch)
req->rl_wtype = rpcrdma_replych;
}
}
/*
* Marshal chunks. This routine will return the header length
* consumed by marshaling.
*/
if (rtype != rpcrdma_noch) {
hdrlen = rpcrdma_create_chunks(rqst,
&rqst->rq_snd_buf, headerp, rtype);
wtype = rtype; /* simplify dprintk */
} else if (wtype != rpcrdma_noch) {
hdrlen = rpcrdma_create_chunks(rqst,
&rqst->rq_rcv_buf, headerp, wtype);
}
hdrlen = rpcrdma_marshal_chunks(rqst, hdrlen);
if (hdrlen < 0)
return hdrlen;
dprintk("RPC: %s: %s: hdrlen %zd rpclen %zd padlen %zd"
" headerp 0x%p base 0x%p lkey 0x%x\n",
__func__, transfertypes[wtype], hdrlen, rpclen, padlen,
__func__, transfertypes[req->rl_wtype], hdrlen, rpclen, padlen,
headerp, base, req->rl_iov.lkey);
/*

11
net/sunrpc/xprtrdma/transport.c
View File

@ -597,13 +597,14 @@ xprt_rdma_send_request(struct rpc_task *task)
struct rpc_xprt *xprt = rqst->rq_xprt;
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
int rc;
int rc = 0;
if (req->rl_niovs == 0) {
if (req->rl_niovs == 0)
rc = rpcrdma_marshal_req(rqst);
if (rc < 0)
goto failed_marshal;
}
else if (r_xprt->rx_ia.ri_memreg_strategy == RPCRDMA_FRMR)
rc = rpcrdma_marshal_chunks(rqst, 0);
if (rc < 0)
goto failed_marshal;
if (req->rl_reply == NULL) /* e.g. reconnection */
rpcrdma_recv_buffer_get(req);

10
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -99,6 +99,14 @@ struct rpcrdma_ep {
#define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit)
#define DECR_CQCOUNT(ep) atomic_sub_return(1, &(ep)->rep_cqcount)
enum rpcrdma_chunktype {
rpcrdma_noch = 0,
rpcrdma_readch,
rpcrdma_areadch,
rpcrdma_writech,
rpcrdma_replych
};
/*
* struct rpcrdma_rep -- this structure encapsulates state required to recv
* and complete a reply, asychronously. It needs several pieces of
@ -192,6 +200,7 @@ struct rpcrdma_req {
unsigned int rl_niovs; /* 0, 2 or 4 */
unsigned int rl_nchunks; /* non-zero if chunks */
unsigned int rl_connect_cookie; /* retry detection */
enum rpcrdma_chunktype rl_rtype, rl_wtype;
struct rpcrdma_buffer *rl_buffer; /* home base for this structure */
struct rpcrdma_rep *rl_reply;/* holder for reply buffer */
struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS];/* chunk segments */
@ -347,6 +356,7 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *);
/*
* RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c
*/
ssize_t rpcrdma_marshal_chunks(struct rpc_rqst *, ssize_t);
int rpcrdma_marshal_req(struct rpc_rqst *);
size_t rpcrdma_max_payload(struct rpcrdma_xprt *);