fs/9p: iattr_valid flags are kernel internal flags map them to 9p values.

Kernel internal values can change, add protocol values for these constant
and use them.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 41 insertions, 1 deletions

diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 73488fb69d38..7ca7171273d1 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -522,6 +522,46 @@ v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
         return 0;
 }
 
+/*
+ * Attribute flags.
+ */
+#define P9_ATTR_MODE            (1 << 0)
+#define P9_ATTR_UID             (1 << 1)
+#define P9_ATTR_GID             (1 << 2)
+#define P9_ATTR_SIZE            (1 << 3)
+#define P9_ATTR_ATIME           (1 << 4)
+#define P9_ATTR_MTIME           (1 << 5)
+#define P9_ATTR_CTIME           (1 << 6)
+#define P9_ATTR_ATIME_SET       (1 << 7)
+#define P9_ATTR_MTIME_SET       (1 << 8)
+
+struct dotl_iattr_map {
+        int iattr_valid;
+        int p9_iattr_valid;
+};
+
+static int v9fs_mapped_iattr_valid(int iattr_valid)
+{
+        int i;
+        int p9_iattr_valid = 0;
+        struct dotl_iattr_map dotl_iattr_map[] = {
+                { ATTR_MODE,            P9_ATTR_MODE },
+                { ATTR_UID,             P9_ATTR_UID },
+                { ATTR_GID,             P9_ATTR_GID },
+                { ATTR_SIZE,            P9_ATTR_SIZE },
+                { ATTR_ATIME,           P9_ATTR_ATIME },
+                { ATTR_MTIME,           P9_ATTR_MTIME },
+                { ATTR_CTIME,           P9_ATTR_CTIME },
+                { ATTR_ATIME_SET,       P9_ATTR_ATIME_SET },
+                { ATTR_MTIME_SET,       P9_ATTR_MTIME_SET },
+        };
+        for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
+                if (iattr_valid & dotl_iattr_map[i].iattr_valid)
+                        p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
+        }
+        return p9_iattr_valid;
+}
+
 /**
  * v9fs_vfs_setattr_dotl - set file metadata
  * @dentry: file whose metadata to set
@@ -542,7 +582,7 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
         if (retval)
                 return retval;
 
-        p9attr.valid = iattr->ia_valid;
+        p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
         p9attr.mode = iattr->ia_mode;
         p9attr.uid = iattr->ia_uid;
         p9attr.gid = iattr->ia_gid;