diff options
| author |   Chuck Lever <chuck.lever@oracle.com> | 2016-11-29 10:52:08 -0500 |
|---|---|---|
| committer |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2016-11-29 16:45:44 -0500 |
| commit | 62aee0e3028614588a14e19979cd3f7b97948505 (patch) | |
| tree | 4378991dc23fe5eb5fed1864136621d422978cf7 /net/sunrpc | |
| parent | Linux 4.9-rc7 (diff) | |
| download | linux-dev-62aee0e3028614588a14e19979cd3f7b97948505.tar.xz linux-dev-62aee0e3028614588a14e19979cd3f7b97948505.zip | |
xprtrdma: Cap size of callback buffer resources
When the inline threshold size is set to large values (say, 32KB)
any NFSv4.1 CB request from the server gets a reply with status
NFS4ERR_RESOURCE.
Looks like there are some upper layer assumptions about the maximum
size of a reply (for example, in process_op). Cap the size of the
NFSv4 client's reply resources at a page.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xprtrdma/backchannel.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c index 2c472e1b4827..24fedd4b117e 100644 --- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -55,7 +55,8 @@ static int rpcrdma_bc_setup_rqst(struct rpcrdma_xprt *r_xprt, if (IS_ERR(rb)) goto out_fail; req->rl_sendbuf = rb; - xdr_buf_init(&rqst->rq_snd_buf, rb->rg_base, size); + xdr_buf_init(&rqst->rq_snd_buf, rb->rg_base, + min_t(size_t, size, PAGE_SIZE)); rpcrdma_set_xprtdata(rqst, req); return 0; @@ -191,6 +192,7 @@ size_t xprt_rdma_bc_maxpayload(struct rpc_xprt *xprt) size_t maxmsg; maxmsg = min_t(unsigned int, cdata->inline_rsize, cdata->inline_wsize); + maxmsg = min_t(unsigned int, maxmsg, PAGE_SIZE); return maxmsg - RPCRDMA_HDRLEN_MIN; } |