NFS: Refactor NFS access to kernel access mask calculation

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

1 files changed, 23 insertions, 8 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 1255891e5695..24b3a6748062 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -2375,16 +2375,31 @@ void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set)
 }
 EXPORT_SYMBOL_GPL(nfs_access_add_cache);
 
+#define NFS_MAY_READ (NFS4_ACCESS_READ)
+#define NFS_MAY_WRITE (NFS4_ACCESS_MODIFY | \
+                NFS4_ACCESS_EXTEND | \
+                NFS4_ACCESS_DELETE)
+#define NFS_MAY_LOOKUP (NFS4_ACCESS_LOOKUP)
+#define NFS_MAY_EXECUTE (NFS4_ACCESS_EXECUTE)
+static int
+nfs_access_calc_mask(u32 access_result)
+{
+        int mask = 0;
+
+        if (access_result & NFS_MAY_READ)
+                mask |= MAY_READ;
+        if (access_result & NFS_MAY_WRITE)
+                mask |= MAY_WRITE;
+        if (access_result & NFS_MAY_LOOKUP)
+                mask |= MAY_EXEC;
+        if (access_result & NFS_MAY_EXECUTE)
+                mask |= MAY_EXEC;
+        return mask;
+}
+
 void nfs_access_set_mask(struct nfs_access_entry *entry, u32 access_result)
 {
-        entry->mask = 0;
-        if (access_result & NFS4_ACCESS_READ)
-                entry->mask |= MAY_READ;
-        if (access_result &
-            (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
-                entry->mask |= MAY_WRITE;
-        if (access_result & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
-                entry->mask |= MAY_EXEC;
+        entry->mask = nfs_access_calc_mask(access_result);
 }
 EXPORT_SYMBOL_GPL(nfs_access_set_mask);