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Diffstat (limited to 'libbcache/blockdev.h')
-rw-r--r--libbcache/blockdev.h126
1 files changed, 83 insertions, 43 deletions
diff --git a/libbcache/blockdev.h b/libbcache/blockdev.h
index 0fc0ed1..aa6c12b 100644
--- a/libbcache/blockdev.h
+++ b/libbcache/blockdev.h
@@ -4,6 +4,49 @@
#include "blockdev_types.h"
#include "io_types.h"
+struct search {
+ /* Stack frame for bio_complete */
+ struct closure cl;
+
+ union {
+ struct bch_read_bio rbio;
+ struct bch_write_bio wbio;
+ };
+ /* Not modified */
+ struct bio *orig_bio;
+ struct bcache_device *d;
+
+ unsigned inode;
+ unsigned write:1;
+
+ /* Flags only used for reads */
+ unsigned recoverable:1;
+ unsigned read_dirty_data:1;
+ unsigned cache_miss:1;
+
+ /*
+ * For reads: bypass read from cache and insertion into cache
+ * For writes: discard key range from cache, sending the write to
+ * the backing device (if there is a backing device)
+ */
+ unsigned bypass:1;
+
+ unsigned long start_time;
+
+ /*
+ * Mostly only used for writes. For reads, we still make use of
+ * some trivial fields:
+ * - c
+ * - error
+ */
+ struct bch_write_op iop;
+};
+
+#ifndef NO_BCACHE_BLOCKDEV
+
+extern struct kobj_type bch_cached_dev_ktype;
+extern struct kobj_type bch_blockdev_volume_ktype;
+
void bch_write_bdev_super(struct cached_dev *, struct closure *);
void bch_cached_dev_release(struct kobject *);
@@ -24,9 +67,49 @@ int bch_blockdev_volumes_start(struct cache_set *);
void bch_blockdevs_stop(struct cache_set *);
+void bch_fs_blockdev_exit(struct cache_set *);
+int bch_fs_blockdev_init(struct cache_set *);
void bch_blockdev_exit(void);
int bch_blockdev_init(void);
+#else
+
+static inline void bch_write_bdev_super(struct cached_dev *dc,
+ struct closure *cl) {}
+
+static inline void bch_cached_dev_release(struct kobject *kobj) {}
+static inline void bch_blockdev_volume_release(struct kobject *kobj) {}
+
+static inline int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c)
+{
+ return 0;
+}
+static inline void bch_attach_backing_devs(struct cache_set *c) {}
+
+static inline void bch_cached_dev_detach(struct cached_dev *dc) {}
+static inline void bch_cached_dev_run(struct cached_dev *dc) {}
+static inline void bch_blockdev_stop(struct bcache_device *d) {}
+
+static inline bool bch_is_open_backing_dev(struct block_device *bdev)
+{
+ return false;
+}
+static inline const char *bch_backing_dev_register(struct bcache_superblock *sb)
+{
+ return "not implemented";
+}
+
+static inline int bch_blockdev_volume_create(struct cache_set *c, u64 s) { return 0; }
+static inline int bch_blockdev_volumes_start(struct cache_set *c) { return 0; }
+
+static inline void bch_blockdevs_stop(struct cache_set *c) {}
+static inline void bch_fs_blockdev_exit(struct cache_set *c) {}
+static inline int bch_fs_blockdev_init(struct cache_set *c) { return 0; }
+static inline void bch_blockdev_exit(void) {}
+static inline int bch_blockdev_init(void) { return 0; }
+
+#endif
+
static inline void cached_dev_put(struct cached_dev *dc)
{
if (atomic_dec_and_test(&dc->count))
@@ -53,47 +136,4 @@ static inline struct bcache_device *bch_dev_find(struct cache_set *c, u64 inode)
return radix_tree_lookup(&c->devices, inode);
}
-struct search {
- /* Stack frame for bio_complete */
- struct closure cl;
-
- union {
- struct bch_read_bio rbio;
- struct bch_write_bio wbio;
- };
- /* Not modified */
- struct bio *orig_bio;
- struct bcache_device *d;
-
- unsigned inode;
- unsigned write:1;
-
- /* Flags only used for reads */
- unsigned recoverable:1;
- unsigned read_dirty_data:1;
- unsigned cache_miss:1;
-
- /*
- * For reads: bypass read from cache and insertion into cache
- * For writes: discard key range from cache, sending the write to
- * the backing device (if there is a backing device)
- */
- unsigned bypass:1;
-
- unsigned long start_time;
-
- /*
- * Mostly only used for writes. For reads, we still make use of
- * some trivial fields:
- * - c
- * - error
- */
- struct bch_write_op iop;
-};
-
-extern struct kmem_cache *bch_search_cache;
-
-extern struct kobj_type bch_cached_dev_ktype;
-extern struct kobj_type bch_blockdev_volume_ktype;
-
#endif /* _BCACHE_BLOCKDEV_H */