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SUNRPC: Trim stack utilization in the wrap and unwrap paths 

By preventing compiler inlining of the integrity and privacy
helpers, stack utilization for the common case (authentication only)
goes way down.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Chuck Lever 2020-03-11 11:21:17 -04:00 committed by Trond Myklebust
parent 8d6bda7f23
commit d162372af3
1 changed files with 8 additions and 6 deletions
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14
net/sunrpc/auth_gss/auth_gss.c
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@ -1724,8 +1724,9 @@ bad_mic:
goto out;
}
static int gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
struct rpc_task *task, struct xdr_stream *xdr)
static noinline_for_stack int
gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_rqst *rqstp = task->tk_rqstp;
struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf;
@ -1816,8 +1817,9 @@ out:
return -EAGAIN;
}
static int gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
struct rpc_task *task, struct xdr_stream *xdr)
static noinline_for_stack int
gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_rqst *rqstp = task->tk_rqstp;
struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
@ -1947,7 +1949,7 @@ gss_unwrap_resp_auth(struct rpc_cred *cred)
* proc_req_arg_t arg;
* };
*/
static int
static noinline_for_stack int
gss_unwrap_resp_integ(struct rpc_task *task, struct rpc_cred *cred,
struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp,
struct xdr_stream *xdr)
@ -2021,7 +2023,7 @@ bad_mic:
goto out;
}
static int
static noinline_for_stack int
gss_unwrap_resp_priv(struct rpc_task *task, struct rpc_cred *cred,
struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp,
struct xdr_stream *xdr)