cifs: allow fsc mount option only if CONFIG_CIFS_FSCACHE is set
authorSuresh Jayaraman <sjayaraman@suse.de>
Wed, 24 Nov 2010 12:19:05 +0000 (17:49 +0530)
committerSteve French <sfrench@us.ibm.com>
Tue, 30 Nov 2010 05:49:28 +0000 (05:49 +0000)
Currently, it is possible to specify 'fsc' mount option even if
CONFIG_CIFS_FSCACHE has not been set. The option is being ignored silently
while the user fscache functionality to work. Fix this by raising error when
the CONFIG option is not set.

Reported-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
fs/cifs/connect.c

index 251a17c..32fa4d9 100644 (file)
@@ -1352,6 +1352,11 @@ cifs_parse_mount_options(char *options, const char *devname,
                                "supported. Instead set "
                                "/proc/fs/cifs/LookupCacheEnabled to 0\n");
                } else if (strnicmp(data, "fsc", 3) == 0) {
+#ifndef CONFIG_CIFS_FSCACHE
+                       cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE"
+                                 "kernel config option set");
+                       return 1;
+#endif
                        vol->fsc = true;
                } else if (strnicmp(data, "mfsymlinks", 10) == 0) {
                        vol->mfsymlinks = true;