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author | Chuck Lever <chuck.lever@oracle.com> | 2019-02-11 11:25:36 -0500 |
---|---|---|
committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2019-02-14 11:48:36 -0500 |
commit | 35e77d21baa04b554bf3dc9a08dfa7e569286e51 (patch) | |
tree | d6e48672b6fbd6ce82ba47438295b18b53b2c4b0 /net/sunrpc/clnt.c | |
parent | a00275baa68e1ee226cc659f54dc3a571f3ad600 (diff) | |
download | linux-stable-35e77d21baa04b554bf3dc9a08dfa7e569286e51.tar.gz linux-stable-35e77d21baa04b554bf3dc9a08dfa7e569286e51.tar.bz2 linux-stable-35e77d21baa04b554bf3dc9a08dfa7e569286e51.zip |
SUNRPC: Add rpc_auth::au_ralign field
Currently rpc_inline_rcv_pages() uses au_rslack to estimate the
size of the upper layer reply header. This is fine for auth flavors
where au_verfsize == au_rslack.
However, some auth flavors have more going on. krb5i for example has
two more words after the verifier, and another blob following the
RPC message. The calculation involving au_rslack pushes the upper
layer reply header too far into the rcv_buf.
au_rslack is still valuable: it's the amount of buffer space needed
for the reply, and is used when allocating the reply buffer. We'll
keep that.
But, add a new field that can be used to properly estimate the
location of the upper layer header in each RPC reply, based on the
auth flavor in use.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r-- | net/sunrpc/clnt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 4ea38b029e2f..99bfeb17367c 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1180,7 +1180,7 @@ void rpc_prepare_reply_pages(struct rpc_rqst *req, struct page **pages, /* Subtract one to force an extra word of buffer space for the * payload's XDR pad to fall into the rcv_buf's tail iovec. */ - hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_rslack - 1; + hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_ralign - 1; xdr_inline_pages(&req->rq_rcv_buf, hdrsize << 2, pages, base, len); trace_rpc_reply_pages(req); |