Enable on-demand read mode by adding an optional parameter to the "bind"
command.
On-demand mode will be turned on when this parameter is "ondemand", i.e.
"bind ondemand". Otherwise cachefiles will work in the original mode.
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220509074028.74954-7-jefflexu@linux.alibaba.com
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
cache->brun_percent >= 100)
return -ERANGE;
- if (*args) {
- pr_err("'bind' command doesn't take an argument\n");
- return -EINVAL;
- }
-
if (!cache->rootdirname) {
pr_err("No cache directory specified\n");
return -EINVAL;
return -EBUSY;
}
+ if (IS_ENABLED(CONFIG_CACHEFILES_ONDEMAND)) {
+ if (!strcmp(args, "ondemand")) {
+ set_bit(CACHEFILES_ONDEMAND_MODE, &cache->flags);
+ } else if (*args) {
+ pr_err("Invalid argument to the 'bind' command\n");
+ return -EINVAL;
+ }
+ } else if (*args) {
+ pr_err("'bind' command doesn't take an argument\n");
+ return -EINVAL;
+ }
+
/* Make sure we have copies of the tag string */
if (!cache->tag) {
/*