FS-Cache: Make kAFS use FS-Cache

The attached patch makes the kAFS filesystem in fs/afs/ use FS-Cache, and
through it any attached caches.  The kAFS filesystem will use caching
automatically if it's available.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>

1 files changed, 25 insertions, 28 deletions

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 67f259d99cd6..106be66dafd2 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -21,6 +21,7 @@
 
 #include "afs.h"
 #include "afs_vl.h"
+#include "cache.h"
 
 #define AFS_CELL_MAX_ADDRS 15
 
@@ -193,8 +194,8 @@ struct afs_cell {
         struct key              *anonymous_key; /* anonymous user key for this cell */
         struct list_head        proc_link;      /* /proc cell list link */
         struct proc_dir_entry   *proc_dir;      /* /proc dir for this cell */
-#ifdef AFS_CACHING_SUPPORT
-        struct cachefs_cookie   *cache;         /* caching cookie */
+#ifdef CONFIG_AFS_FSCACHE
+        struct fscache_cookie   *cache;         /* caching cookie */
 #endif
 
         /* server record management */
@@ -249,8 +250,8 @@ struct afs_vlocation {
         struct list_head        grave;          /* link in master graveyard list */
         struct list_head        update;         /* link in master update list */
         struct afs_cell         *cell;          /* cell to which volume belongs */
-#ifdef AFS_CACHING_SUPPORT
-        struct cachefs_cookie   *cache;         /* caching cookie */
+#ifdef CONFIG_AFS_FSCACHE
+        struct fscache_cookie   *cache;         /* caching cookie */
 #endif
         struct afs_cache_vlocation vldb;        /* volume information DB record */
         struct afs_volume       *vols[3];       /* volume access record pointer (index by type) */
@@ -302,8 +303,8 @@ struct afs_volume {
         atomic_t                usage;
         struct afs_cell         *cell;          /* cell to which belongs (unrefd ptr) */
         struct afs_vlocation    *vlocation;     /* volume location */
-#ifdef AFS_CACHING_SUPPORT
-        struct cachefs_cookie   *cache;         /* caching cookie */
+#ifdef CONFIG_AFS_FSCACHE
+        struct fscache_cookie   *cache;         /* caching cookie */
 #endif
         afs_volid_t             vid;            /* volume ID */
         afs_voltype_t           type;           /* type of volume */
@@ -333,8 +334,8 @@ struct afs_vnode {
         struct afs_server       *server;        /* server currently supplying this file */
         struct afs_fid          fid;            /* the file identifier for this inode */
         struct afs_file_status  status;         /* AFS status info for this file */
-#ifdef AFS_CACHING_SUPPORT
-        struct cachefs_cookie   *cache;         /* caching cookie */
+#ifdef CONFIG_AFS_FSCACHE
+        struct fscache_cookie   *cache;         /* caching cookie */
 #endif
         struct afs_permits      *permits;       /* cache of permits so far obtained */
         struct mutex            permits_lock;   /* lock for altering permits list */
@@ -428,6 +429,22 @@ struct afs_uuid {
 
 /*****************************************************************************/
 /*
+ * cache.c
+ */
+#ifdef CONFIG_AFS_FSCACHE
+extern struct fscache_netfs afs_cache_netfs;
+extern struct fscache_cookie_def afs_cell_cache_index_def;
+extern struct fscache_cookie_def afs_vlocation_cache_index_def;
+extern struct fscache_cookie_def afs_volume_cache_index_def;
+extern struct fscache_cookie_def afs_vnode_cache_index_def;
+#else
+#define afs_cell_cache_index_def        (*(struct fscache_cookie_def *) NULL)
+#define afs_vlocation_cache_index_def   (*(struct fscache_cookie_def *) NULL)
+#define afs_volume_cache_index_def      (*(struct fscache_cookie_def *) NULL)
+#define afs_vnode_cache_index_def       (*(struct fscache_cookie_def *) NULL)
+#endif
+
+/*
  * callback.c
  */
 extern void afs_init_callback_state(struct afs_server *);
@@ -446,9 +463,6 @@ extern void afs_callback_update_kill(void);
  */
 extern struct rw_semaphore afs_proc_cells_sem;
 extern struct list_head afs_proc_cells;
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_cache_cell_index_def;
-#endif
 
 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
 extern int afs_cell_init(char *);
@@ -554,9 +568,6 @@ extern void afs_clear_inode(struct inode *);
  * main.c
  */
 extern struct afs_uuid afs_uuid;
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_netfs afs_cache_netfs;
-#endif
 
 /*
  * misc.c
@@ -637,10 +648,6 @@ extern int afs_get_MAC_address(u8 *, size_t);
 /*
  * vlclient.c
  */
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_vlocation_cache_index_def;
-#endif
-
 extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
                                     const char *, struct afs_cache_vlocation *,
                                     const struct afs_wait_mode *);
@@ -664,12 +671,6 @@ extern void afs_vlocation_purge(void);
 /*
  * vnode.c
  */
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_vnode_cache_index_def;
-#endif
-
-extern struct afs_timer_ops afs_vnode_cb_timed_out_ops;
-
 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
 {
         return container_of(inode, struct afs_vnode, vfs_inode);
@@ -711,10 +712,6 @@ extern int afs_vnode_release_lock(struct afs_vnode *, struct key *);
 /*
  * volume.c
  */
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_volume_cache_index_def;
-#endif
-
 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
 
 extern void afs_put_volume(struct afs_volume *);