cifs: add warning about change in default cache semantics in 3.7
Add a warning that will be displayed when there is no cache= option
specified. We want to ensure that users are aware of the change in
defaults coming in 3.7.
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 3418680..c49d494 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1244,6 +1244,8 @@
char *string = NULL;
char *tmp_end, *value;
char delim;
+ bool cache_specified = false;
+ static bool cache_warned = false;
separator[0] = ',';
separator[1] = 0;
@@ -1455,6 +1457,7 @@
vol->seal = 1;
break;
case Opt_direct:
+ cache_specified = true;
vol->direct_io = true;
vol->strict_io = false;
cERROR(1, "The \"directio\" option will be removed in "
@@ -1462,6 +1465,7 @@
"option.");
break;
case Opt_strictcache:
+ cache_specified = true;
vol->direct_io = false;
vol->strict_io = true;
cERROR(1, "The \"strictcache\" option will be removed "
@@ -1888,6 +1892,7 @@
goto cifs_parse_mount_err;
break;
case Opt_cache:
+ cache_specified = true;
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
@@ -1938,6 +1943,14 @@
printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
"specified with no gid= option.\n");
+ /* FIXME: remove this block in 3.7 */
+ if (!cache_specified && !cache_warned) {
+ cache_warned = true;
+ printk(KERN_NOTICE "CIFS: no cache= option specified, using "
+ "\"cache=loose\". This default will change "
+ "to \"cache=strict\" in 3.7.\n");
+ }
+
kfree(mountdata_copy);
return 0;