orangefs: do not allow client readahead cache without feature bit
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
diff --git a/fs/orangefs/orangefs-sysfs.c b/fs/orangefs/orangefs-sysfs.c
index 2fe9a3a..ed5ee33 100644
--- a/fs/orangefs/orangefs-sysfs.c
+++ b/fs/orangefs/orangefs-sysfs.c
@@ -842,6 +842,16 @@
if (!strcmp(kobj_id, ORANGEFS_KOBJ_ID)) {
orangefs_attr = (struct orangefs_attribute *)attr;
+ /* Drop unsupported requests first. */
+ if (!(orangefs_features & ORANGEFS_FEATURE_READAHEAD) &&
+ (!strcmp(orangefs_attr->attr.name, "readahead_count") ||
+ !strcmp(orangefs_attr->attr.name, "readahead_size") ||
+ !strcmp(orangefs_attr->attr.name,
+ "readahead_count_size"))) {
+ rc = -EINVAL;
+ goto out;
+ }
+
if (!strcmp(orangefs_attr->attr.name, "perf_history_size"))
new_op->upcall.req.param.op =
ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE;
@@ -1133,6 +1143,15 @@
if (!strcmp(kobj_id, ORANGEFS_KOBJ_ID)) {
orangefs_attr = (struct orangefs_attribute *)attr;
+ /* Drop unsupported requests first. */
+ if (!(orangefs_features & ORANGEFS_FEATURE_READAHEAD) &&
+ (!strcmp(orangefs_attr->attr.name, "readahead_count") ||
+ !strcmp(orangefs_attr->attr.name, "readahead_size") ||
+ !strcmp(orangefs_attr->attr.name,
+ "readahead_count_size"))) {
+ rc = -EINVAL;
+ goto out;
+ }
if (!strcmp(orangefs_attr->attr.name, "perf_history_size")) {
if (val > 0) {