lkml.org 
[lkml]   [2019]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.2 308/413] SUNRPC: Ensure the bvecs are reset when we re-encode the RPC request
Date
From: Trond Myklebust <trond.myklebust@hammerspace.com>

commit 75369089820473eac45e9ddd970081901a373c08 upstream.

The bvec tracks the list of pages, so if the number of pages changes
due to a re-encode, we need to reset the bvec as well.

Fixes: 277e4ab7d530 ("SUNRPC: Simplify TCP receive code by switching...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/sunrpc/clnt.c | 3 +--
net/sunrpc/xprt.c | 2 ++
net/sunrpc/xprtsock.c | 1 +
3 files changed, 4 insertions(+), 2 deletions(-)

--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1788,6 +1788,7 @@ rpc_xdr_encode(struct rpc_task *task)
req->rq_snd_buf.head[0].iov_len = 0;
xdr_init_encode(&xdr, &req->rq_snd_buf,
req->rq_snd_buf.head[0].iov_base, req);
+ xdr_free_bvec(&req->rq_snd_buf);
if (rpc_encode_header(task, &xdr))
return;

@@ -1827,8 +1828,6 @@ call_encode(struct rpc_task *task)
rpc_call_rpcerror(task, task->tk_status);
}
return;
- } else {
- xprt_request_prepare(task->tk_rqstp);
}

/* Add task to reply queue before transmission to avoid races */
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1013,6 +1013,8 @@ xprt_request_enqueue_receive(struct rpc_

if (!xprt_request_need_enqueue_receive(task, req))
return;
+
+ xprt_request_prepare(task->tk_rqstp);
spin_lock(&xprt->queue_lock);

/* Update the softirq receive buffer */
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -909,6 +909,7 @@ static int xs_nospace(struct rpc_rqst *r
static void
xs_stream_prepare_request(struct rpc_rqst *req)
{
+ xdr_free_bvec(&req->rq_rcv_buf);
req->rq_task->tk_status = xdr_alloc_bvec(&req->rq_rcv_buf, GFP_KERNEL);
}


\
 
 \ /
  Last update: 2019-07-24 21:37    [W:1.137 / U:1.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site