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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* * fs/cifs/fscache.h - CIFS filesystem cache interface definitions * * Copyright (c) 2010 Novell, Inc. * Authors(s): Suresh Jayaraman (sjayaraman@suse.de> * * This library is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published * by the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _CIFS_FSCACHE_H #define _CIFS_FSCACHE_H #include <linux/fscache.h> #include "cifsglob.h" #ifdef CONFIG_CIFS_FSCACHE extern struct fscache_netfs cifs_fscache_netfs; extern const struct fscache_cookie_def cifs_fscache_server_index_def; extern const struct fscache_cookie_def cifs_fscache_super_index_def; extern const struct fscache_cookie_def cifs_fscache_inode_object_def; extern int cifs_fscache_register(void); extern void cifs_fscache_unregister(void); /* * fscache.c */ extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *); extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *); extern void cifs_fscache_get_super_cookie(struct cifs_tcon *); extern void cifs_fscache_release_super_cookie(struct cifs_tcon *); extern void cifs_fscache_release_inode_cookie(struct inode *); extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *); extern void cifs_fscache_reset_inode_cookie(struct inode *); extern void __cifs_fscache_invalidate_page(struct page *, struct inode *); extern int cifs_fscache_release_page(struct page *page, gfp_t gfp); extern int __cifs_readpage_from_fscache(struct inode *, struct page *); extern int __cifs_readpages_from_fscache(struct inode *, struct address_space *, struct list_head *, unsigned *); extern void __cifs_fscache_readpages_cancel(struct inode *, struct list_head *); extern void __cifs_readpage_to_fscache(struct inode *, struct page *); static inline void cifs_fscache_invalidate_page(struct page *page, struct inode *inode) { if (PageFsCache(page)) __cifs_fscache_invalidate_page(page, inode); } static inline int cifs_readpage_from_fscache(struct inode *inode, struct page *page) { if (CIFS_I(inode)->fscache) return __cifs_readpage_from_fscache(inode, page); return -ENOBUFS; } static inline int cifs_readpages_from_fscache(struct inode *inode, struct address_space *mapping, struct list_head *pages, unsigned *nr_pages) { if (CIFS_I(inode)->fscache) return __cifs_readpages_from_fscache(inode, mapping, pages, nr_pages); return -ENOBUFS; } static inline void cifs_readpage_to_fscache(struct inode *inode, struct page *page) { if (PageFsCache(page)) __cifs_readpage_to_fscache(inode, page); } static inline void cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages) { if (CIFS_I(inode)->fscache) return __cifs_fscache_readpages_cancel(inode, pages); } #else /* CONFIG_CIFS_FSCACHE */ static inline int cifs_fscache_register(void) { return 0; } static inline void cifs_fscache_unregister(void) {} static inline void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {} static inline void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {} static inline void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) {} static inline void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {} static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {} static inline void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) {} static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {} static inline int cifs_fscache_release_page(struct page *page, gfp_t gfp) { return 1; /* May release page */ } static inline void cifs_fscache_invalidate_page(struct page *page, struct inode *inode) {} static inline int cifs_readpage_from_fscache(struct inode *inode, struct page *page) { return -ENOBUFS; } static inline int cifs_readpages_from_fscache(struct inode *inode, struct address_space *mapping, struct list_head *pages, unsigned *nr_pages) { return -ENOBUFS; } static inline void cifs_readpage_to_fscache(struct inode *inode, struct page *page) {} static inline void cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages) { } #endif /* CONFIG_CIFS_FSCACHE */ #endif /* _CIFS_FSCACHE_H */ |