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Diffstat (limited to 'include')
-rw-r--r--include/linux/fscache.h16
1 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index b195c2e1ef6a..245b48646efa 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -178,6 +178,13 @@ extern void __fscache_unregister_netfs(struct fscache_netfs *);
extern struct fscache_cache_tag *__fscache_lookup_cache_tag(const char *);
extern void __fscache_release_cache_tag(struct fscache_cache_tag *);
+extern struct fscache_cookie *__fscache_acquire_cookie(
+ struct fscache_cookie *,
+ const struct fscache_cookie_def *,
+ void *);
+extern void __fscache_relinquish_cookie(struct fscache_cookie *, int);
+extern void __fscache_update_cookie(struct fscache_cookie *);
+
/**
* fscache_register_netfs - Register a filesystem as desiring caching services
* @netfs: The description of the filesystem
@@ -269,7 +276,10 @@ struct fscache_cookie *fscache_acquire_cookie(
const struct fscache_cookie_def *def,
void *netfs_data)
{
- return NULL;
+ if (fscache_cookie_valid(parent))
+ return __fscache_acquire_cookie(parent, def, netfs_data);
+ else
+ return NULL;
}
/**
@@ -287,6 +297,8 @@ struct fscache_cookie *fscache_acquire_cookie(
static inline
void fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire)
{
+ if (fscache_cookie_valid(cookie))
+ __fscache_relinquish_cookie(cookie, retire);
}
/**
@@ -302,6 +314,8 @@ void fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire)
static inline
void fscache_update_cookie(struct fscache_cookie *cookie)
{
+ if (fscache_cookie_valid(cookie))
+ __fscache_update_cookie(cookie);
}
/**