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FS-Cache: Wrap checks on object state

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Wrap checks on object state (mostly outside of fs/fscache/object.c) with
inline functions so that the mechanism can be replaced.

Some of the state checks within object.c are left as-is as they will be
replaced.

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-By: Milosz Tanski <milosz@adfin.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
This commit is contained in:
David Howells
2013-05-10 19:50:26 +01:00
parent 610be24ee4
commit 493f7bc114
6 changed files with 40 additions and 21 deletions
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include/linux/fscache-cache.h
+28 -9
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@@ -417,15 +417,6 @@ struct fscache_object {
extern const char *fscache_object_states[];
#define fscache_object_is_active(obj) \
(!test_bit(FSCACHE_IOERROR, &(obj)->cache->flags) && \
(obj)->state >= FSCACHE_OBJECT_AVAILABLE && \
(obj)->state < FSCACHE_OBJECT_DYING)
#define fscache_object_is_dead(obj) \
(test_bit(FSCACHE_IOERROR, &(obj)->cache->flags) && \
(obj)->state >= FSCACHE_OBJECT_DYING)
extern void fscache_object_init(struct fscache_object *, struct fscache_cookie *,
struct fscache_cache *);
@@ -438,6 +429,34 @@ extern void fscache_object_destroy(struct fscache_object *object);
#define fscache_object_destroy(object) do {} while(0)
#endif
static inline bool fscache_object_is_live(struct fscache_object *object)
{
return object->state < FSCACHE_OBJECT_DYING;
}
static inline bool fscache_object_is_dying(struct fscache_object *object)
{
return !fscache_object_is_live(object);
}
static inline bool fscache_object_is_available(struct fscache_object *object)
{
return object->state >= FSCACHE_OBJECT_AVAILABLE;
}
static inline bool fscache_object_is_active(struct fscache_object *object)
{
return fscache_object_is_available(object) &&
fscache_object_is_live(object) &&
!test_bit(FSCACHE_IOERROR, &object->cache->flags);
}
static inline bool fscache_object_is_dead(struct fscache_object *object)
{
return fscache_object_is_dying(object) &&
test_bit(FSCACHE_IOERROR, &object->cache->flags);
}
/**
* fscache_object_destroyed - Note destruction of an object in a cache
* @cache: The cache from which the object came