nfsd: wrap all accesses to st_deny_bmap

Handle the st_deny_bmap in a similar fashion to the st_access_bmap. Add
accessor functions and use those instead of bare bitops.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 29 insertions, 8 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 83066abc66bb..c474161fd4b6 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -492,6 +492,27 @@ test_access(u32 access, struct nfs4_ol_stateid *stp)
         return test_bit(access, &stp->st_access_bmap);
 }
 
+/* set share deny for a given stateid */
+static inline void
+set_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+        __set_bit(access, &stp->st_deny_bmap);
+}
+
+/* clear share deny for a given stateid */
+static inline void
+clear_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+        __clear_bit(access, &stp->st_deny_bmap);
+}
+
+/* test whether a given stateid is denying specific access */
+static inline bool
+test_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+        return test_bit(access, &stp->st_deny_bmap);
+}
+
 static int nfs4_access_to_omode(u32 access)
 {
         switch (access & NFS4_SHARE_ACCESS_BOTH) {
@@ -2462,7 +2483,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
         stp->st_access_bmap = 0;
         stp->st_deny_bmap = 0;
         set_access(open->op_share_access, stp);
-        __set_bit(open->op_share_deny, &stp->st_deny_bmap);
+        set_deny(open->op_share_deny, stp);
         stp->st_openstp = NULL;
 }
 
@@ -2541,8 +2562,8 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
         ret = nfserr_locked;
         /* Search for conflicting share reservations */
         list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
-                if (test_bit(deny_type, &stp->st_deny_bmap) ||
-                    test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
+                if (test_deny(deny_type, stp) ||
+                    test_deny(NFS4_SHARE_DENY_BOTH, stp))
                         goto out;
         }
         ret = nfs_ok;
@@ -2814,7 +2835,7 @@ nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *c
         }
         /* remember the open */
         set_access(op_share_access, stp);
-        __set_bit(open->op_share_deny, &stp->st_deny_bmap);
+        set_deny(open->op_share_deny, stp);
 
         return nfs_ok;
 }
@@ -3687,12 +3708,12 @@ static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_ac
 }
 
 static void
-reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
+reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
 {
         int i;
         for (i = 0; i < 4; i++) {
                 if ((i & deny) != i)
-                        __clear_bit(i, bmap);
+                        clear_deny(i, stp);
         }
 }
 
@@ -3724,14 +3745,14 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
                         stp->st_access_bmap, od->od_share_access);
                 goto out;
         }
-        if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
+        if (!test_deny(od->od_share_deny, stp)) {
                 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
                         stp->st_deny_bmap, od->od_share_deny);
                 goto out;
         }
         nfs4_stateid_downgrade(stp, od->od_share_access);
 
-        reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
+        reset_union_bmap_deny(od->od_share_deny, stp);
 
         update_stateid(&stp->st_stid.sc_stateid);
         memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));