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-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c48
-rw-r--r--net/sunrpc/xprtrdma/transport.c17
2 files changed, 42 insertions, 23 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 77b84cfa5c77..693966d3f33b 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -77,6 +77,8 @@ static const char transfertypes[][12] = {
* Prepare the passed-in xdr_buf into representation as RPC/RDMA chunk
* elements. Segments are then coalesced when registered, if possible
* within the selected memreg mode.
+ *
+ * Returns positive number of segments converted, or a negative errno.
*/
static int
@@ -103,12 +105,13 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos,
/* alloc the pagelist for receiving buffer */
ppages[p] = alloc_page(GFP_ATOMIC);
if (!ppages[p])
- return 0;
+ return -ENOMEM;
}
seg[n].mr_page = ppages[p];
seg[n].mr_offset = (void *)(unsigned long) page_base;
seg[n].mr_len = min_t(u32, PAGE_SIZE - page_base, len);
- BUG_ON(seg[n].mr_len > PAGE_SIZE);
+ if (seg[n].mr_len > PAGE_SIZE)
+ return -EIO;
len -= seg[n].mr_len;
++n;
++p;
@@ -117,7 +120,7 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos,
/* Message overflows the seg array */
if (len && n == nsegs)
- return 0;
+ return -EIO;
if (xdrbuf->tail[0].iov_len) {
/* the rpcrdma protocol allows us to omit any trailing
@@ -126,7 +129,7 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos,
return n;
if (n == nsegs)
/* Tail remains, but we're out of segments */
- return 0;
+ return -EIO;
seg[n].mr_page = NULL;
seg[n].mr_offset = xdrbuf->tail[0].iov_base;
seg[n].mr_len = xdrbuf->tail[0].iov_len;
@@ -167,15 +170,17 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos,
* Reply chunk (a counted array):
* N elements:
* 1 - N - HLOO - HLOO - ... - HLOO
+ *
+ * Returns positive RPC/RDMA header size, or negative errno.
*/
-static unsigned int
+static ssize_t
rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target,
struct rpcrdma_msg *headerp, enum rpcrdma_chunktype type)
{
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
- int nsegs, nchunks = 0;
+ int n, nsegs, nchunks = 0;
unsigned int pos;
struct rpcrdma_mr_seg *seg = req->rl_segments;
struct rpcrdma_read_chunk *cur_rchunk = NULL;
@@ -201,11 +206,11 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target,
pos = target->head[0].iov_len;
nsegs = rpcrdma_convert_iovs(target, pos, type, seg, RPCRDMA_MAX_SEGS);
- if (nsegs == 0)
- return 0;
+ if (nsegs < 0)
+ return nsegs;
do {
- int n = rpcrdma_register_external(seg, nsegs,
+ n = rpcrdma_register_external(seg, nsegs,
cur_wchunk != NULL, r_xprt);
if (n <= 0)
goto out;
@@ -277,7 +282,7 @@ out:
for (pos = 0; nchunks--;)
pos += rpcrdma_deregister_external(
&req->rl_segments[pos], r_xprt);
- return 0;
+ return n;
}
/*
@@ -359,6 +364,8 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad)
* [1] -- the RPC header/data, marshaled by RPC and the NFS protocol.
* [2] -- optional padding.
* [3] -- if padded, header only in [1] and data here.
+ *
+ * Returns zero on success, otherwise a negative errno.
*/
int
@@ -368,7 +375,8 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
char *base;
- size_t hdrlen, rpclen, padlen;
+ size_t rpclen, padlen;
+ ssize_t hdrlen;
enum rpcrdma_chunktype rtype, wtype;
struct rpcrdma_msg *headerp;
@@ -439,7 +447,11 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
/* The following simplification is not true forever */
if (rtype != rpcrdma_noch && wtype == rpcrdma_replych)
wtype = rpcrdma_noch;
- BUG_ON(rtype != rpcrdma_noch && wtype != rpcrdma_noch);
+ if (rtype != rpcrdma_noch && wtype != rpcrdma_noch) {
+ dprintk("RPC: %s: cannot marshal multiple chunk lists\n",
+ __func__);
+ return -EIO;
+ }
hdrlen = 28; /*sizeof *headerp;*/
padlen = 0;
@@ -464,8 +476,11 @@ 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 */
- BUG_ON(wtype != rpcrdma_noch);
-
+ if (wtype != rpcrdma_noch) {
+ dprintk("RPC: %s: invalid chunk list\n",
+ __func__);
+ return -EIO;
+ }
} else {
headerp->rm_body.rm_nochunks.rm_empty[0] = xdr_zero;
headerp->rm_body.rm_nochunks.rm_empty[1] = xdr_zero;
@@ -500,9 +515,8 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
hdrlen = rpcrdma_create_chunks(rqst,
&rqst->rq_rcv_buf, headerp, wtype);
}
-
- if (hdrlen == 0)
- return -1;
+ 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",
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 93fe7753ff94..66f91f0d071a 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -595,13 +595,12 @@ 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;
- /* marshal the send itself */
- if (req->rl_niovs == 0 && rpcrdma_marshal_req(rqst) != 0) {
- r_xprt->rx_stats.failed_marshal_count++;
- dprintk("RPC: %s: rpcrdma_marshal_req failed\n",
- __func__);
- return -EIO;
+ if (req->rl_niovs == 0) {
+ rc = rpcrdma_marshal_req(rqst);
+ if (rc < 0)
+ goto failed_marshal;
}
if (req->rl_reply == NULL) /* e.g. reconnection */
@@ -625,6 +624,12 @@ xprt_rdma_send_request(struct rpc_task *task)
rqst->rq_bytes_sent = 0;
return 0;
+failed_marshal:
+ r_xprt->rx_stats.failed_marshal_count++;
+ dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n",
+ __func__, rc);
+ if (rc == -EIO)
+ return -EIO;
drop_connection:
xprt_disconnect_done(xprt);
return -ENOTCONN; /* implies disconnect */
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-07 16:39:32 +0000