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099dd788e3
checkpatch complains about source files with filenames (e.g. in these cases just below the SPDX header in comments at the top of various files in fs/cifs). It also is helpful to change this now so will be less confusing when the parent directory is renamed e.g. from fs/cifs to fs/smb_client (or fs/smbfs) Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
183 lines
5.4 KiB
C
183 lines
5.4 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/fscache.h>
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#include "cifsglob.h"
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#ifdef CONFIG_CIFS_FSCACHE
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/*
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* Auxiliary data attached to CIFS superblock within the cache
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*/
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struct cifs_fscache_super_auxdata {
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u64 resource_id; /* unique server resource id */
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__le64 vol_create_time;
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u32 vol_serial_number;
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} __packed;
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/*
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* Auxiliary data attached to CIFS inode within the cache
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*/
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struct cifs_fscache_inode_auxdata {
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u64 last_write_time_sec;
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u64 last_change_time_sec;
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u32 last_write_time_nsec;
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u32 last_change_time_nsec;
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u64 eof;
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};
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/*
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* cache.c
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*/
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extern struct fscache_netfs cifs_fscache_netfs;
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extern const struct fscache_cookie_def cifs_fscache_server_index_def;
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extern const struct fscache_cookie_def cifs_fscache_super_index_def;
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extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
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extern int cifs_fscache_register(void);
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extern void cifs_fscache_unregister(void);
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/*
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* fscache.c
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*/
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extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
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extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
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extern void 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_release_inode_cookie(struct inode *);
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extern void cifs_fscache_update_inode_cookie(struct inode *inode);
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extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *);
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extern void cifs_fscache_reset_inode_cookie(struct inode *);
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extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
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extern void __cifs_fscache_wait_on_page_write(struct inode *inode, struct page *page);
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extern void __cifs_fscache_uncache_page(struct inode *inode, struct page *page);
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extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
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extern int __cifs_readpage_from_fscache(struct inode *, struct page *);
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extern int __cifs_readpages_from_fscache(struct inode *,
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struct address_space *,
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struct list_head *,
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unsigned *);
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extern void __cifs_fscache_readpages_cancel(struct inode *, struct list_head *);
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extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
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static inline void cifs_fscache_invalidate_page(struct page *page,
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struct inode *inode)
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{
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if (PageFsCache(page))
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__cifs_fscache_invalidate_page(page, inode);
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}
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static inline void cifs_fscache_wait_on_page_write(struct inode *inode,
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struct page *page)
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{
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if (PageFsCache(page))
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__cifs_fscache_wait_on_page_write(inode, page);
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}
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static inline void cifs_fscache_uncache_page(struct inode *inode,
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struct page *page)
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{
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if (PageFsCache(page))
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__cifs_fscache_uncache_page(inode, page);
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}
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static inline int cifs_readpage_from_fscache(struct inode *inode,
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struct page *page)
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{
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if (CIFS_I(inode)->fscache)
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return __cifs_readpage_from_fscache(inode, page);
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return -ENOBUFS;
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}
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static inline int cifs_readpages_from_fscache(struct inode *inode,
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struct address_space *mapping,
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struct list_head *pages,
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unsigned *nr_pages)
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{
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if (CIFS_I(inode)->fscache)
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return __cifs_readpages_from_fscache(inode, mapping, pages,
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nr_pages);
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return -ENOBUFS;
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}
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static inline void cifs_readpage_to_fscache(struct inode *inode,
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struct page *page)
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{
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if (PageFsCache(page))
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__cifs_readpage_to_fscache(inode, page);
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}
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static inline void cifs_fscache_readpages_cancel(struct inode *inode,
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struct list_head *pages)
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{
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if (CIFS_I(inode)->fscache)
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return __cifs_fscache_readpages_cancel(inode, pages);
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}
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#else /* CONFIG_CIFS_FSCACHE */
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static inline int cifs_fscache_register(void) { return 0; }
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static inline void cifs_fscache_unregister(void) {}
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static inline void
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cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
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static inline void
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cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {}
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static inline void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) {}
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static inline void
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cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
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static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
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static inline void cifs_fscache_update_inode_cookie(struct inode *inode) {}
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static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
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struct file *filp) {}
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static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
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static inline int cifs_fscache_release_page(struct page *page, gfp_t gfp)
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{
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return 1; /* May release page */
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}
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static inline void cifs_fscache_invalidate_page(struct page *page,
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struct inode *inode) {}
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static inline void cifs_fscache_wait_on_page_write(struct inode *inode,
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struct page *page) {}
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static inline void cifs_fscache_uncache_page(struct inode *inode,
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struct page *page) {}
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static inline int
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cifs_readpage_from_fscache(struct inode *inode, struct page *page)
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{
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return -ENOBUFS;
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}
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static inline int cifs_readpages_from_fscache(struct inode *inode,
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struct address_space *mapping,
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struct list_head *pages,
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unsigned *nr_pages)
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{
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return -ENOBUFS;
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}
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static inline void cifs_readpage_to_fscache(struct inode *inode,
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struct page *page) {}
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static inline void cifs_fscache_readpages_cancel(struct inode *inode,
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struct list_head *pages)
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{
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}
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#endif /* CONFIG_CIFS_FSCACHE */
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#endif /* _CIFS_FSCACHE_H */
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