+++ /dev/null
-/*
- * Copyright (c) 2016 Oracle. All rights reserved.
- * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses. You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the BSD-type
- * license below:
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * Neither the name of the Network Appliance, Inc. nor the names of
- * its contributors may be used to endorse or promote products
- * derived from this software without specific prior written
- * permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Author: Tom Tucker <tom@opengridcomputing.com>
- */
-
-#include <linux/sunrpc/xdr.h>
-#include <linux/sunrpc/debug.h>
-#include <asm/unaligned.h>
-#include <linux/sunrpc/rpc_rdma.h>
-#include <linux/sunrpc/svc_rdma.h>
-
-#define RPCDBG_FACILITY RPCDBG_SVCXPRT
-
-static __be32 *xdr_check_read_list(__be32 *p, __be32 *end)
-{
- __be32 *next;
-
- while (*p++ != xdr_zero) {
- next = p + rpcrdma_readchunk_maxsz - 1;
- if (next > end)
- return NULL;
- p = next;
- }
- return p;
-}
-
-static __be32 *xdr_check_write_list(__be32 *p, __be32 *end)
-{
- __be32 *next;
-
- while (*p++ != xdr_zero) {
- next = p + 1 + be32_to_cpup(p) * rpcrdma_segment_maxsz;
- if (next > end)
- return NULL;
- p = next;
- }
- return p;
-}
-
-static __be32 *xdr_check_reply_chunk(__be32 *p, __be32 *end)
-{
- __be32 *next;
-
- if (*p++ != xdr_zero) {
- next = p + 1 + be32_to_cpup(p) * rpcrdma_segment_maxsz;
- if (next > end)
- return NULL;
- p = next;
- }
- return p;
-}
-
-/**
- * svc_rdma_xdr_decode_req - Parse incoming RPC-over-RDMA header
- * @rq_arg: Receive buffer
- *
- * On entry, xdr->head[0].iov_base points to first byte in the
- * RPC-over-RDMA header.
- *
- * On successful exit, head[0] points to first byte past the
- * RPC-over-RDMA header. For RDMA_MSG, this is the RPC message.
- * The length of the RPC-over-RDMA header is returned.
- */
-int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg)
-{
- __be32 *p, *end, *rdma_argp;
- unsigned int hdr_len;
-
- /* Verify that there's enough bytes for header + something */
- if (rq_arg->len <= RPCRDMA_HDRLEN_ERR)
- goto out_short;
-
- rdma_argp = rq_arg->head[0].iov_base;
- if (*(rdma_argp + 1) != rpcrdma_version)
- goto out_version;
-
- switch (*(rdma_argp + 3)) {
- case rdma_msg:
- case rdma_nomsg:
- break;
-
- case rdma_done:
- goto out_drop;
-
- case rdma_error:
- goto out_drop;
-
- default:
- goto out_proc;
- }
-
- end = (__be32 *)((unsigned long)rdma_argp + rq_arg->len);
- p = xdr_check_read_list(rdma_argp + 4, end);
- if (!p)
- goto out_inval;
- p = xdr_check_write_list(p, end);
- if (!p)
- goto out_inval;
- p = xdr_check_reply_chunk(p, end);
- if (!p)
- goto out_inval;
- if (p > end)
- goto out_inval;
-
- rq_arg->head[0].iov_base = p;
- hdr_len = (unsigned long)p - (unsigned long)rdma_argp;
- rq_arg->head[0].iov_len -= hdr_len;
- return hdr_len;
-
-out_short:
- dprintk("svcrdma: header too short = %d\n", rq_arg->len);
- return -EINVAL;
-
-out_version:
- dprintk("svcrdma: bad xprt version: %u\n",
- be32_to_cpup(rdma_argp + 1));
- return -EPROTONOSUPPORT;
-
-out_drop:
- dprintk("svcrdma: dropping RDMA_DONE/ERROR message\n");
- return 0;
-
-out_proc:
- dprintk("svcrdma: bad rdma procedure (%u)\n",
- be32_to_cpup(rdma_argp + 3));
- return -EINVAL;
-
-out_inval:
- dprintk("svcrdma: failed to parse transport header\n");
- return -EINVAL;
-}
/*
+ * Copyright (c) 2016, 2017 Oracle. All rights reserved.
* Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved.
* Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved.
*
* Author: Tom Tucker <tom@opengridcomputing.com>
*/
+#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/debug.h>
#include <linux/sunrpc/rpc_rdma.h>
#include <linux/spinlock.h>
rqstp->rq_arg.tail[0].iov_len = 0;
}
+static __be32 *xdr_check_read_list(__be32 *p, __be32 *end)
+{
+ __be32 *next;
+
+ while (*p++ != xdr_zero) {
+ next = p + rpcrdma_readchunk_maxsz - 1;
+ if (next > end)
+ return NULL;
+ p = next;
+ }
+ return p;
+}
+
+static __be32 *xdr_check_write_list(__be32 *p, __be32 *end)
+{
+ __be32 *next;
+
+ while (*p++ != xdr_zero) {
+ next = p + 1 + be32_to_cpup(p) * rpcrdma_segment_maxsz;
+ if (next > end)
+ return NULL;
+ p = next;
+ }
+ return p;
+}
+
+static __be32 *xdr_check_reply_chunk(__be32 *p, __be32 *end)
+{
+ __be32 *next;
+
+ if (*p++ != xdr_zero) {
+ next = p + 1 + be32_to_cpup(p) * rpcrdma_segment_maxsz;
+ if (next > end)
+ return NULL;
+ p = next;
+ }
+ return p;
+}
+
+/* On entry, xdr->head[0].iov_base points to first byte in the
+ * RPC-over-RDMA header.
+ *
+ * On successful exit, head[0] points to first byte past the
+ * RPC-over-RDMA header. For RDMA_MSG, this is the RPC message.
+ * The length of the RPC-over-RDMA header is returned.
+ *
+ * Assumptions:
+ * - The transport header is entirely contained in the head iovec.
+ */
+static int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg)
+{
+ __be32 *p, *end, *rdma_argp;
+ unsigned int hdr_len;
+ char *proc;
+
+ /* Verify that there's enough bytes for header + something */
+ if (rq_arg->len <= RPCRDMA_HDRLEN_ERR)
+ goto out_short;
+
+ rdma_argp = rq_arg->head[0].iov_base;
+ if (*(rdma_argp + 1) != rpcrdma_version)
+ goto out_version;
+
+ switch (*(rdma_argp + 3)) {
+ case rdma_msg:
+ proc = "RDMA_MSG";
+ break;
+ case rdma_nomsg:
+ proc = "RDMA_NOMSG";
+ break;
+
+ case rdma_done:
+ goto out_drop;
+
+ case rdma_error:
+ goto out_drop;
+
+ default:
+ goto out_proc;
+ }
+
+ end = (__be32 *)((unsigned long)rdma_argp + rq_arg->len);
+ p = xdr_check_read_list(rdma_argp + 4, end);
+ if (!p)
+ goto out_inval;
+ p = xdr_check_write_list(p, end);
+ if (!p)
+ goto out_inval;
+ p = xdr_check_reply_chunk(p, end);
+ if (!p)
+ goto out_inval;
+ if (p > end)
+ goto out_inval;
+
+ rq_arg->head[0].iov_base = p;
+ hdr_len = (unsigned long)p - (unsigned long)rdma_argp;
+ rq_arg->head[0].iov_len -= hdr_len;
+ dprintk("svcrdma: received %s request for XID 0x%08x, hdr_len=%u\n",
+ proc, be32_to_cpup(rdma_argp), hdr_len);
+ return hdr_len;
+
+out_short:
+ dprintk("svcrdma: header too short = %d\n", rq_arg->len);
+ return -EINVAL;
+
+out_version:
+ dprintk("svcrdma: bad xprt version: %u\n",
+ be32_to_cpup(rdma_argp + 1));
+ return -EPROTONOSUPPORT;
+
+out_drop:
+ dprintk("svcrdma: dropping RDMA_DONE/ERROR message\n");
+ return 0;
+
+out_proc:
+ dprintk("svcrdma: bad rdma procedure (%u)\n",
+ be32_to_cpup(rdma_argp + 3));
+ return -EINVAL;
+
+out_inval:
+ dprintk("svcrdma: failed to parse transport header\n");
+ return -EINVAL;
+}
+
/* Issue an RDMA_READ using the local lkey to map the data sink */
int rdma_read_chunk_lcl(struct svcxprt_rdma *xprt,
struct svc_rqst *rqstp,
projects / mirror_ubuntu-jammy-kernel.git / commitdiff