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-rw-r--r--fs/ceph/cache.h148
1 files changed, 148 insertions, 0 deletions
diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h
new file mode 100644
index 000000000..dc502daac
--- /dev/null
+++ b/fs/ceph/cache.h
@@ -0,0 +1,148 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Ceph cache definitions.
+ *
+ * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
+ * Written by Milosz Tanski (milosz@adfin.com)
+ */
+
+#ifndef _CEPH_CACHE_H
+#define _CEPH_CACHE_H
+
+#include <linux/netfs.h>
+
+#ifdef CONFIG_CEPH_FSCACHE
+#include <linux/fscache.h>
+
+int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
+void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
+
+void ceph_fscache_register_inode_cookie(struct inode *inode);
+void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
+
+void ceph_fscache_use_cookie(struct inode *inode, bool will_modify);
+void ceph_fscache_unuse_cookie(struct inode *inode, bool update);
+
+void ceph_fscache_update(struct inode *inode);
+void ceph_fscache_invalidate(struct inode *inode, bool dio_write);
+
+static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
+{
+ return netfs_i_cookie(&ci->netfs);
+}
+
+static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ struct fscache_cookie *cookie = ceph_fscache_cookie(ci);
+
+ if (cookie) {
+ ceph_fscache_use_cookie(inode, true);
+ fscache_resize_cookie(cookie, to);
+ ceph_fscache_unuse_cookie(inode, true);
+ }
+}
+
+static inline void ceph_fscache_unpin_writeback(struct inode *inode,
+ struct writeback_control *wbc)
+{
+ fscache_unpin_writeback(wbc, ceph_fscache_cookie(ceph_inode(inode)));
+}
+
+static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
+ struct folio *folio)
+{
+ struct ceph_inode_info *ci = ceph_inode(mapping->host);
+
+ return fscache_dirty_folio(mapping, folio, ceph_fscache_cookie(ci));
+}
+
+static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
+{
+ struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
+
+ return fscache_begin_read_operation(&rreq->cache_resources, cookie);
+}
+
+static inline bool ceph_is_cache_enabled(struct inode *inode)
+{
+ return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
+}
+
+static inline void ceph_fscache_note_page_release(struct inode *inode)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+
+ fscache_note_page_release(ceph_fscache_cookie(ci));
+}
+#else /* CONFIG_CEPH_FSCACHE */
+static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
+ struct fs_context *fc)
+{
+ return 0;
+}
+
+static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
+{
+}
+
+static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
+{
+}
+
+static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
+{
+}
+
+static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
+{
+}
+
+static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
+{
+}
+
+static inline void ceph_fscache_update(struct inode *inode)
+{
+}
+
+static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
+{
+}
+
+static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
+{
+ return NULL;
+}
+
+static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
+{
+}
+
+static inline void ceph_fscache_unpin_writeback(struct inode *inode,
+ struct writeback_control *wbc)
+{
+}
+
+static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
+ struct folio *folio)
+{
+ return filemap_dirty_folio(mapping, folio);
+}
+
+static inline bool ceph_is_cache_enabled(struct inode *inode)
+{
+ return false;
+}
+
+static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
+{
+ return -ENOBUFS;
+}
+
+static inline void ceph_fscache_note_page_release(struct inode *inode)
+{
+}
+#endif /* CONFIG_CEPH_FSCACHE */
+
+#endif