From: Chuck Lever <chuck.lever@oracle.com>
To: bfields@fieldses.org
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH v3 4/7] svcrdma: Keep rpcrdma_msg fields in network byte-order
Date: Thu, 04 Jun 2015 11:21:10 -0400 [thread overview]
Message-ID: <20150604152109.7835.74016.stgit@klimt.1015granger.net> (raw)
In-Reply-To: <20150604151716.7835.65047.stgit@klimt.1015granger.net>
Fields in struct rpcrdma_msg are __be32. Don't byte-swap these
fields when decoding RPC calls and then swap them back for the
reply. For the most part, they can be left alone.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
include/linux/sunrpc/svc_rdma.h | 2 -
net/sunrpc/xprtrdma/svc_rdma_marshal.c | 84 ++++++++++++++----------------
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 2 -
net/sunrpc/xprtrdma/svc_rdma_transport.c | 2 -
4 files changed, 42 insertions(+), 48 deletions(-)
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 8ad9b6d..c03ca0a 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -184,7 +184,7 @@ struct svcxprt_rdma {
extern int svc_rdma_xdr_decode_req(struct rpcrdma_msg **, struct svc_rqst *);
extern int svc_rdma_xdr_encode_error(struct svcxprt_rdma *,
struct rpcrdma_msg *,
- enum rpcrdma_errcode, u32 *);
+ enum rpcrdma_errcode, __be32 *);
extern void svc_rdma_xdr_encode_write_list(struct rpcrdma_msg *, int);
extern void svc_rdma_xdr_encode_reply_array(struct rpcrdma_write_array *, int);
extern void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *, int,
diff --git a/net/sunrpc/xprtrdma/svc_rdma_marshal.c b/net/sunrpc/xprtrdma/svc_rdma_marshal.c
index 45e22c9..e2fca76 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_marshal.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_marshal.c
@@ -50,12 +50,12 @@
/*
* Decodes a read chunk list. The expected format is as follows:
* descrim : xdr_one
- * position : u32 offset into XDR stream
- * handle : u32 RKEY
+ * position : __be32 offset into XDR stream
+ * handle : __be32 RKEY
* . . .
* end-of-list: xdr_zero
*/
-static u32 *decode_read_list(u32 *va, u32 *vaend)
+static __be32 *decode_read_list(__be32 *va, __be32 *vaend)
{
struct rpcrdma_read_chunk *ch = (struct rpcrdma_read_chunk *)va;
@@ -67,20 +67,20 @@ static u32 *decode_read_list(u32 *va, u32 *vaend)
}
ch++;
}
- return (u32 *)&ch->rc_position;
+ return &ch->rc_position;
}
/*
* Decodes a write chunk list. The expected format is as follows:
* descrim : xdr_one
* nchunks : <count>
- * handle : u32 RKEY ---+
- * length : u32 <len of segment> |
+ * handle : __be32 RKEY ---+
+ * length : __be32 <len of segment> |
* offset : remove va + <count>
* . . . |
* ---+
*/
-static u32 *decode_write_list(u32 *va, u32 *vaend)
+static __be32 *decode_write_list(__be32 *va, __be32 *vaend)
{
unsigned long start, end;
int nchunks;
@@ -90,14 +90,14 @@ static u32 *decode_write_list(u32 *va, u32 *vaend)
/* Check for not write-array */
if (ary->wc_discrim == xdr_zero)
- return (u32 *)&ary->wc_nchunks;
+ return &ary->wc_nchunks;
if ((unsigned long)ary + sizeof(struct rpcrdma_write_array) >
(unsigned long)vaend) {
dprintk("svcrdma: ary=%p, vaend=%p\n", ary, vaend);
return NULL;
}
- nchunks = ntohl(ary->wc_nchunks);
+ nchunks = be32_to_cpu(ary->wc_nchunks);
start = (unsigned long)&ary->wc_array[0];
end = (unsigned long)vaend;
@@ -112,10 +112,10 @@ static u32 *decode_write_list(u32 *va, u32 *vaend)
* rs_length is the 2nd 4B field in wc_target and taking its
* address skips the list terminator
*/
- return (u32 *)&ary->wc_array[nchunks].wc_target.rs_length;
+ return &ary->wc_array[nchunks].wc_target.rs_length;
}
-static u32 *decode_reply_array(u32 *va, u32 *vaend)
+static __be32 *decode_reply_array(__be32 *va, __be32 *vaend)
{
unsigned long start, end;
int nchunks;
@@ -124,14 +124,14 @@ static u32 *decode_reply_array(u32 *va, u32 *vaend)
/* Check for no reply-array */
if (ary->wc_discrim == xdr_zero)
- return (u32 *)&ary->wc_nchunks;
+ return &ary->wc_nchunks;
if ((unsigned long)ary + sizeof(struct rpcrdma_write_array) >
(unsigned long)vaend) {
dprintk("svcrdma: ary=%p, vaend=%p\n", ary, vaend);
return NULL;
}
- nchunks = ntohl(ary->wc_nchunks);
+ nchunks = be32_to_cpu(ary->wc_nchunks);
start = (unsigned long)&ary->wc_array[0];
end = (unsigned long)vaend;
@@ -142,15 +142,14 @@ static u32 *decode_reply_array(u32 *va, u32 *vaend)
ary, nchunks, vaend);
return NULL;
}
- return (u32 *)&ary->wc_array[nchunks];
+ return (__be32 *)&ary->wc_array[nchunks];
}
int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req,
struct svc_rqst *rqstp)
{
struct rpcrdma_msg *rmsgp = NULL;
- u32 *va;
- u32 *vaend;
+ __be32 *va, *vaend;
u32 hdr_len;
rmsgp = (struct rpcrdma_msg *)rqstp->rq_arg.head[0].iov_base;
@@ -162,22 +161,17 @@ int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req,
return -EINVAL;
}
- /* Decode the header */
- rmsgp->rm_xid = ntohl(rmsgp->rm_xid);
- rmsgp->rm_vers = ntohl(rmsgp->rm_vers);
- rmsgp->rm_credit = ntohl(rmsgp->rm_credit);
- rmsgp->rm_type = ntohl(rmsgp->rm_type);
-
- if (rmsgp->rm_vers != RPCRDMA_VERSION)
+ if (rmsgp->rm_vers != rpcrdma_version)
return -ENOSYS;
/* Pull in the extra for the padded case and bump our pointer */
- if (rmsgp->rm_type == RDMA_MSGP) {
+ if (rmsgp->rm_type == rdma_msgp) {
int hdrlen;
+
rmsgp->rm_body.rm_padded.rm_align =
- ntohl(rmsgp->rm_body.rm_padded.rm_align);
+ be32_to_cpu(rmsgp->rm_body.rm_padded.rm_align);
rmsgp->rm_body.rm_padded.rm_thresh =
- ntohl(rmsgp->rm_body.rm_padded.rm_thresh);
+ be32_to_cpu(rmsgp->rm_body.rm_padded.rm_thresh);
va = &rmsgp->rm_body.rm_padded.rm_pempty[4];
rqstp->rq_arg.head[0].iov_base = va;
@@ -192,7 +186,7 @@ int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req,
* chunk list and a reply chunk list.
*/
va = &rmsgp->rm_body.rm_chunks[0];
- vaend = (u32 *)((unsigned long)rmsgp + rqstp->rq_arg.len);
+ vaend = (__be32 *)((unsigned long)rmsgp + rqstp->rq_arg.len);
va = decode_read_list(va, vaend);
if (!va)
return -EINVAL;
@@ -213,18 +207,18 @@ int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req,
int svc_rdma_xdr_encode_error(struct svcxprt_rdma *xprt,
struct rpcrdma_msg *rmsgp,
- enum rpcrdma_errcode err, u32 *va)
+ enum rpcrdma_errcode err, __be32 *va)
{
- u32 *startp = va;
+ __be32 *startp = va;
- *va++ = htonl(rmsgp->rm_xid);
- *va++ = htonl(rmsgp->rm_vers);
- *va++ = htonl(xprt->sc_max_requests);
- *va++ = htonl(RDMA_ERROR);
- *va++ = htonl(err);
+ *va++ = rmsgp->rm_xid;
+ *va++ = rmsgp->rm_vers;
+ *va++ = cpu_to_be32(xprt->sc_max_requests);
+ *va++ = rdma_error;
+ *va++ = cpu_to_be32(err);
if (err == ERR_VERS) {
- *va++ = htonl(RPCRDMA_VERSION);
- *va++ = htonl(RPCRDMA_VERSION);
+ *va++ = rpcrdma_version;
+ *va++ = rpcrdma_version;
}
return (int)((unsigned long)va - (unsigned long)startp);
@@ -241,7 +235,7 @@ int svc_rdma_xdr_get_reply_hdr_len(struct rpcrdma_msg *rmsgp)
&rmsgp->rm_body.rm_chunks[1];
if (wr_ary->wc_discrim)
wr_ary = (struct rpcrdma_write_array *)
- &wr_ary->wc_array[ntohl(wr_ary->wc_nchunks)].
+ &wr_ary->wc_array[be32_to_cpu(wr_ary->wc_nchunks)].
wc_target.rs_length;
else
wr_ary = (struct rpcrdma_write_array *)
@@ -250,7 +244,7 @@ int svc_rdma_xdr_get_reply_hdr_len(struct rpcrdma_msg *rmsgp)
/* skip reply array */
if (wr_ary->wc_discrim)
wr_ary = (struct rpcrdma_write_array *)
- &wr_ary->wc_array[ntohl(wr_ary->wc_nchunks)];
+ &wr_ary->wc_array[be32_to_cpu(wr_ary->wc_nchunks)];
else
wr_ary = (struct rpcrdma_write_array *)
&wr_ary->wc_nchunks;
@@ -269,7 +263,7 @@ void svc_rdma_xdr_encode_write_list(struct rpcrdma_msg *rmsgp, int chunks)
ary = (struct rpcrdma_write_array *)
&rmsgp->rm_body.rm_chunks[1];
ary->wc_discrim = xdr_one;
- ary->wc_nchunks = htonl(chunks);
+ ary->wc_nchunks = cpu_to_be32(chunks);
/* write-list terminator */
ary->wc_array[chunks].wc_target.rs_handle = xdr_zero;
@@ -282,7 +276,7 @@ void svc_rdma_xdr_encode_reply_array(struct rpcrdma_write_array *ary,
int chunks)
{
ary->wc_discrim = xdr_one;
- ary->wc_nchunks = htonl(chunks);
+ ary->wc_nchunks = cpu_to_be32(chunks);
}
void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *ary,
@@ -294,7 +288,7 @@ void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *ary,
struct rpcrdma_segment *seg = &ary->wc_array[chunk_no].wc_target;
seg->rs_handle = rs_handle;
seg->rs_offset = rs_offset;
- seg->rs_length = htonl(write_len);
+ seg->rs_length = cpu_to_be32(write_len);
}
void svc_rdma_xdr_encode_reply_header(struct svcxprt_rdma *xprt,
@@ -302,10 +296,10 @@ void svc_rdma_xdr_encode_reply_header(struct svcxprt_rdma *xprt,
struct rpcrdma_msg *rdma_resp,
enum rpcrdma_proc rdma_type)
{
- rdma_resp->rm_xid = htonl(rdma_argp->rm_xid);
- rdma_resp->rm_vers = htonl(rdma_argp->rm_vers);
- rdma_resp->rm_credit = htonl(xprt->sc_max_requests);
- rdma_resp->rm_type = htonl(rdma_type);
+ rdma_resp->rm_xid = rdma_argp->rm_xid;
+ rdma_resp->rm_vers = rdma_argp->rm_vers;
+ rdma_resp->rm_credit = cpu_to_be32(xprt->sc_max_requests);
+ rdma_resp->rm_type = cpu_to_be32(rdma_type);
/* Encode <nul> chunks lists */
rdma_resp->rm_body.rm_chunks[0] = xdr_zero;
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index f9f13a3..ac93ce0 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -85,7 +85,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp,
/* RDMA_NOMSG: RDMA READ data should land just after RDMA RECV data */
rmsgp = (struct rpcrdma_msg *)rqstp->rq_arg.head[0].iov_base;
- if (be32_to_cpu(rmsgp->rm_type) == RDMA_NOMSG)
+ if (rmsgp->rm_type == rdma_nomsg)
rqstp->rq_arg.pages = &rqstp->rq_pages[0];
else
rqstp->rq_arg.pages = &rqstp->rq_pages[1];
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index f609c1c..be08493 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -1319,7 +1319,7 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
struct ib_send_wr err_wr;
struct page *p;
struct svc_rdma_op_ctxt *ctxt;
- u32 *va;
+ __be32 *va;
int length;
int ret;
next prev parent reply other threads:[~2015-06-04 15:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-04 15:20 [PATCH v3 0/7] NFS/RDMA server patches for 4.2 Chuck Lever
2015-06-04 15:20 ` [PATCH v3 1/7] svcrdma: Fix byte-swapping in svc_rdma_sendto.c Chuck Lever
2015-06-04 15:20 ` [PATCH v3 2/7] SUNRPC: Move EXPORT_SYMBOL for svc_process Chuck Lever
2015-06-04 15:20 ` [PATCH v3 3/7] svcrdma: Remove svc_rdma_xdr_decode_deferred_req() Chuck Lever
2015-06-04 15:21 ` Chuck Lever [this message]
2015-06-04 15:21 ` [PATCH v3 5/7] svcrdma: Replace GFP_KERNEL in a loop with GFP_NOFAIL Chuck Lever
2015-06-04 15:21 ` [PATCH v3 6/7] svcrdma: Add a separate "max data segs macro for svcrdma Chuck Lever
2015-06-04 15:21 ` [PATCH v3 7/7] rpcrdma: Merge svcrdma and xprtrdma modules into one Chuck Lever
2015-06-04 20:56 ` [PATCH v3 0/7] NFS/RDMA server patches for 4.2 J. Bruce Fields
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150604152109.7835.74016.stgit@klimt.1015granger.net \
--to=chuck.lever@oracle.com \
--cc=bfields@fieldses.org \
--cc=linux-nfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.