redonkable/alistair23-linux
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SUNRPC: Trim stack utilization in the wrap and unwrap paths

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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
View file

@ -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)