[CIFS] add mode to acl conversion helper function
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index ec445802..dabbce0 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -138,9 +138,9 @@
umode_t *pbits_to_set)
{
/* the order of ACEs is important. The canonical order is to begin with
- DENY entries then follow with ALLOW, otherwise an allow entry could be
+ DENY entries followed by ALLOW, otherwise an allow entry could be
encountered first, making the subsequent deny entry like "dead code"
- which would be superflous since Windows stops when a match is made
+ which would be superflous since Windows stops when a match is made
for the operation you are trying to perform for your user */
/* For deny ACEs we change the mask so that subsequent allow access
@@ -188,6 +188,37 @@
return;
}
+/*
+ Generate access flags to reflect permissions mode is the existing mode.
+ This function is called for every ACE in the DACL whose SID matches
+ with either owner or group or everyone.
+*/
+
+static void mode_to_access_flags(umode_t mode, umode_t bits_to_use,
+ __u32 *pace_flags)
+{
+ /* reset access mask */
+ *pace_flags = 0x0;
+
+ /* bits to use are either S_IRWXU or S_IRWXG or S_IRWXO */
+ mode &= bits_to_use;
+
+ /* check for R/W/X UGO since we do not know whose flags
+ is this but we have cleared all the bits sans RWX for
+ either user or group or other as per bits_to_use */
+ if (mode & S_IRUGO)
+ *pace_flags |= SET_FILE_READ_RIGHTS;
+ if (mode & S_IWUGO)
+ *pace_flags |= SET_FILE_WRITE_RIGHTS;
+ if (mode & S_IXUGO)
+ *pace_flags |= SET_FILE_EXEC_RIGHTS;
+
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("mode: 0x%x, access flags now 0x%x", mode, *pace_flags));
+#endif
+ return;
+}
+
#ifdef CONFIG_CIFS_DEBUG2
static void dump_ace(struct cifs_ace *pace, char *end_of_acl)