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https://github.com/torvalds/linux
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c1ec4d7c2e
Provide default invalidate_folio and release_folio calls. These will need to interact with invalidation correctly at some point. They will be needed if netfslib is to make use of folio->private for its own purposes. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org
118 lines
2.8 KiB
C
118 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Ceph cache definitions.
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*
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* Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
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* Written by Milosz Tanski (milosz@adfin.com)
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*/
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#ifndef _CEPH_CACHE_H
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#define _CEPH_CACHE_H
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#include <linux/netfs.h>
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#ifdef CONFIG_CEPH_FSCACHE
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#include <linux/fscache.h>
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int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
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void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
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void ceph_fscache_register_inode_cookie(struct inode *inode);
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void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
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void ceph_fscache_use_cookie(struct inode *inode, bool will_modify);
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void ceph_fscache_unuse_cookie(struct inode *inode, bool update);
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void ceph_fscache_update(struct inode *inode);
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void ceph_fscache_invalidate(struct inode *inode, bool dio_write);
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static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
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{
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return netfs_i_cookie(&ci->netfs);
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}
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static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct fscache_cookie *cookie = ceph_fscache_cookie(ci);
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if (cookie) {
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ceph_fscache_use_cookie(inode, true);
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fscache_resize_cookie(cookie, to);
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ceph_fscache_unuse_cookie(inode, true);
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}
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}
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static inline int ceph_fscache_unpin_writeback(struct inode *inode,
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struct writeback_control *wbc)
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{
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return netfs_unpin_writeback(inode, wbc);
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}
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#define ceph_fscache_dirty_folio netfs_dirty_folio
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static inline bool ceph_is_cache_enabled(struct inode *inode)
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{
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return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
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}
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#else /* CONFIG_CEPH_FSCACHE */
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static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
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struct fs_context *fc)
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{
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return 0;
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}
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static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
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{
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}
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static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
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{
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}
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static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
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{
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}
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static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
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{
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}
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static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
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{
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}
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static inline void ceph_fscache_update(struct inode *inode)
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{
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}
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static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
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{
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}
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static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
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{
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return NULL;
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}
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static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
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{
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}
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static inline int ceph_fscache_unpin_writeback(struct inode *inode,
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struct writeback_control *wbc)
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{
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return 0;
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}
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#define ceph_fscache_dirty_folio filemap_dirty_folio
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static inline bool ceph_is_cache_enabled(struct inode *inode)
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{
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return false;
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}
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#endif /* CONFIG_CEPH_FSCACHE */
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#endif
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