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authorChuck Lever <chuck.lever@oracle.com>2016-06-29 13:55:06 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-07-11 15:50:43 -0400
commit65b80179f9b8171b74625febf3457f41e792fa23 (patch)
tree91ed3dcb91c5bab4967ddfdf85132bb7b579a700 /net/sunrpc/auth_gss
parent64695bde6c289a62250eb0a078916703c8cf639a (diff)
xprtrdma: No direct data placement with krb5i and krb5p
Direct data placement is not allowed when using flavors that guarantee integrity or privacy. When such security flavors are in effect, don't allow the use of Read and Write chunks for moving individual data items. All messages larger than the inline threshold are sent via Long Call or Long Reply. On my systems (CX-3 Pro on FDR), for small I/O operations, the use of Long messages adds only around 5 usecs of latency in each direction. Note that when integrity or encryption is used, the host CPU touches every byte in these messages. Even if it could be used, data movement offload doesn't buy much in this case. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/auth_gss')
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c2
-rw-r--r--net/sunrpc/auth_gss/gss_krb5_mech.c2
-rw-r--r--net/sunrpc/auth_gss/gss_mech_switch.c12
3 files changed, 16 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index e64ae93d5b4f..bca3537efffd 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -1017,6 +1017,8 @@ gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
auth->au_rslack = GSS_VERF_SLACK >> 2;
auth->au_ops = &authgss_ops;
auth->au_flavor = flavor;
+ if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor))
+ auth->au_flags |= RPCAUTH_AUTH_DATATOUCH;
atomic_set(&auth->au_count, 1);
kref_init(&gss_auth->kref);
diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c
index 65427492b1c9..60595835317a 100644
--- a/net/sunrpc/auth_gss/gss_krb5_mech.c
+++ b/net/sunrpc/auth_gss/gss_krb5_mech.c
@@ -745,12 +745,14 @@ static struct pf_desc gss_kerberos_pfs[] = {
.qop = GSS_C_QOP_DEFAULT,
.service = RPC_GSS_SVC_INTEGRITY,
.name = "krb5i",
+ .datatouch = true,
},
[2] = {
.pseudoflavor = RPC_AUTH_GSS_KRB5P,
.qop = GSS_C_QOP_DEFAULT,
.service = RPC_GSS_SVC_PRIVACY,
.name = "krb5p",
+ .datatouch = true,
},
};
diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c
index 7063d856a598..5fec3abbe19b 100644
--- a/net/sunrpc/auth_gss/gss_mech_switch.c
+++ b/net/sunrpc/auth_gss/gss_mech_switch.c
@@ -361,6 +361,18 @@ gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
}
EXPORT_SYMBOL(gss_pseudoflavor_to_service);
+bool
+gss_pseudoflavor_to_datatouch(struct gss_api_mech *gm, u32 pseudoflavor)
+{
+ int i;
+
+ for (i = 0; i < gm->gm_pf_num; i++) {
+ if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
+ return gm->gm_pfs[i].datatouch;
+ }
+ return false;
+}
+
char *
gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
{