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742b3443e2
Remove some code that was #if'd out with the netfslib conversion. This is split into parts for file.c as the diff generator otherwise produces a hard to read diff for part of it where a big chunk is cut out. Signed-off-by: David Howells <dhowells@redhat.com> cc: Steve French <sfrench@samba.org> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Rohith Surabattula <rohiths.msft@gmail.com> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org
102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 */
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/*
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* CIFS filesystem cache interface definitions
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*
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* Copyright (c) 2010 Novell, Inc.
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* Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
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*
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*/
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#ifndef _CIFS_FSCACHE_H
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#define _CIFS_FSCACHE_H
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#include <linux/swap.h>
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#include <linux/fscache.h>
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#include "cifsglob.h"
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/*
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* Coherency data attached to CIFS volume within the cache
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*/
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struct cifs_fscache_volume_coherency_data {
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__le64 resource_id; /* unique server resource id */
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__le64 vol_create_time;
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__le32 vol_serial_number;
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} __packed;
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/*
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* Coherency data attached to CIFS inode within the cache.
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*/
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struct cifs_fscache_inode_coherency_data {
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__le64 last_write_time_sec;
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__le64 last_change_time_sec;
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__le32 last_write_time_nsec;
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__le32 last_change_time_nsec;
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};
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#ifdef CONFIG_CIFS_FSCACHE
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/*
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* fscache.c
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*/
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extern int cifs_fscache_get_super_cookie(struct cifs_tcon *);
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extern void cifs_fscache_release_super_cookie(struct cifs_tcon *);
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extern void cifs_fscache_get_inode_cookie(struct inode *inode);
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extern void cifs_fscache_release_inode_cookie(struct inode *);
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extern void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update);
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static inline
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void cifs_fscache_fill_coherency(struct inode *inode,
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struct cifs_fscache_inode_coherency_data *cd)
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{
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struct timespec64 ctime = inode_get_ctime(inode);
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struct timespec64 mtime = inode_get_mtime(inode);
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memset(cd, 0, sizeof(*cd));
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cd->last_write_time_sec = cpu_to_le64(mtime.tv_sec);
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cd->last_write_time_nsec = cpu_to_le32(mtime.tv_nsec);
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cd->last_change_time_sec = cpu_to_le64(ctime.tv_sec);
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cd->last_change_time_nsec = cpu_to_le32(ctime.tv_nsec);
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}
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static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode)
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{
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return netfs_i_cookie(&CIFS_I(inode)->netfs);
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}
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static inline void cifs_invalidate_cache(struct inode *inode, unsigned int flags)
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{
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struct cifs_fscache_inode_coherency_data cd;
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cifs_fscache_fill_coherency(inode, &cd);
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fscache_invalidate(cifs_inode_cookie(inode), &cd,
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i_size_read(inode), flags);
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}
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static inline bool cifs_fscache_enabled(struct inode *inode)
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{
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return fscache_cookie_enabled(cifs_inode_cookie(inode));
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}
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#else /* CONFIG_CIFS_FSCACHE */
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static inline
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void cifs_fscache_fill_coherency(struct inode *inode,
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struct cifs_fscache_inode_coherency_data *cd)
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{
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}
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static inline int cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) { return 0; }
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static inline void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
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static inline void cifs_fscache_get_inode_cookie(struct inode *inode) {}
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static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
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static inline void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update) {}
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static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode) { return NULL; }
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static inline void cifs_invalidate_cache(struct inode *inode, unsigned int flags) {}
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static inline bool cifs_fscache_enabled(struct inode *inode) { return false; }
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#endif /* CONFIG_CIFS_FSCACHE */
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#endif /* _CIFS_FSCACHE_H */
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