SUNRPC: Enforce atomic updates of rpc_cred->cr_flags

Convert to the use of atomic bitops...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 11 insertions, 11 deletions

diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 766de0a41b22..55c47ae0a258 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -114,8 +114,8 @@ gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
         write_lock(&gss_ctx_lock);
         old = gss_cred->gc_ctx;
         gss_cred->gc_ctx = ctx;
-        cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
-        cred->cr_flags &= ~RPCAUTH_CRED_NEW;
+        set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
+        clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags);
         write_unlock(&gss_ctx_lock);
         if (old)
                 gss_put_ctx(old);
@@ -128,7 +128,7 @@ gss_cred_is_uptodate_ctx(struct rpc_cred *cred)
         int res = 0;
 
         read_lock(&gss_ctx_lock);
-        if ((cred->cr_flags & RPCAUTH_CRED_UPTODATE) && gss_cred->gc_ctx)
+        if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) && gss_cred->gc_ctx)
                 res = 1;
         read_unlock(&gss_ctx_lock);
         return res;
@@ -732,7 +732,7 @@ gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
          * Note: in order to force a call to call_refresh(), we deliberately
          * fail to flag the credential as RPCAUTH_CRED_UPTODATE.
          */
-        cred->gc_base.cr_flags = RPCAUTH_CRED_NEW;
+        cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW;
         cred->gc_service = gss_auth->service;
         return &cred->gc_base;
 
@@ -764,7 +764,7 @@ gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
          * we don't really care if the credential has expired or not,
          * since the caller should be prepared to reinitialise it.
          */
-        if ((flags & RPCAUTH_LOOKUP_NEW) && (rc->cr_flags & RPCAUTH_CRED_NEW))
+        if ((flags & RPCAUTH_LOOKUP_NEW) && test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
                 goto out;
         /* Don't match with creds that have expired. */
         if (gss_cred->gc_ctx && time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
@@ -820,7 +820,7 @@ gss_marshal(struct rpc_task *task, __be32 *p)
         mic.data = (u8 *)(p + 1);
         maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
         if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
-                cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+                clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         } else if (maj_stat != 0) {
                 printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
                 goto out_put_ctx;
@@ -873,7 +873,7 @@ gss_validate(struct rpc_task *task, __be32 *p)
 
         maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
         if (maj_stat == GSS_S_CONTEXT_EXPIRED)
-                cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+                clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         if (maj_stat)
                 goto out_bad;
         /* We leave it to unwrap to calculate au_rslack. For now we just
@@ -927,7 +927,7 @@ gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
         maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
         status = -EIO; /* XXX? */
         if (maj_stat == GSS_S_CONTEXT_EXPIRED)
-                cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+                clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         else if (maj_stat)
                 return status;
         q = xdr_encode_opaque(p, NULL, mic.len);
@@ -1026,7 +1026,7 @@ gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
         /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
          * done anyway, so it's safe to put the request on the wire: */
         if (maj_stat == GSS_S_CONTEXT_EXPIRED)
-                cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+                clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         else if (maj_stat)
                 return status;
 
@@ -1113,7 +1113,7 @@ gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
 
         maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
         if (maj_stat == GSS_S_CONTEXT_EXPIRED)
-                cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+                clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         if (maj_stat != GSS_S_COMPLETE)
                 return status;
         return 0;
@@ -1138,7 +1138,7 @@ gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
 
         maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
         if (maj_stat == GSS_S_CONTEXT_EXPIRED)
-                cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
+                clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
         if (maj_stat != GSS_S_COMPLETE)
                 return status;
         if (ntohl(*(*p)++) != rqstp->rq_seqno)