Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Ceph cache definitions. |
| 3 | * |
| 4 | * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. |
| 5 | * Written by Milosz Tanski (milosz@adfin.com) |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 |
| 9 | * as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to: |
| 18 | * Free Software Foundation |
| 19 | * 51 Franklin Street, Fifth Floor |
| 20 | * Boston, MA 02111-1301 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #ifndef _CEPH_CACHE_H |
| 25 | #define _CEPH_CACHE_H |
| 26 | |
| 27 | #ifdef CONFIG_CEPH_FSCACHE |
| 28 | |
Milosz Tanski | 971f0bd | 2013-09-06 15:13:18 +0000 | [diff] [blame] | 29 | extern struct fscache_netfs ceph_cache_netfs; |
| 30 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 31 | int ceph_fscache_register(void); |
| 32 | void ceph_fscache_unregister(void); |
| 33 | |
| 34 | int ceph_fscache_register_fs(struct ceph_fs_client* fsc); |
| 35 | void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); |
| 36 | |
| 37 | void ceph_fscache_inode_init(struct ceph_inode_info *ci); |
| 38 | void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc, |
| 39 | struct ceph_inode_info* ci); |
| 40 | void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci); |
| 41 | |
| 42 | int ceph_readpage_from_fscache(struct inode *inode, struct page *page); |
| 43 | int ceph_readpages_from_fscache(struct inode *inode, |
| 44 | struct address_space *mapping, |
| 45 | struct list_head *pages, |
| 46 | unsigned *nr_pages); |
| 47 | void ceph_readpage_to_fscache(struct inode *inode, struct page *page); |
| 48 | void ceph_invalidate_fscache_page(struct inode* inode, struct page *page); |
| 49 | void ceph_queue_revalidate(struct inode *inode); |
| 50 | |
Yunchuan Wen | 020c4bd | 2013-12-26 06:29:26 -0800 | [diff] [blame^] | 51 | static inline void ceph_fscache_update_objectsize(struct inode *inode) |
| 52 | { |
| 53 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 54 | fscache_attr_changed(ci->fscache); |
| 55 | } |
| 56 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 57 | static inline void ceph_fscache_invalidate(struct inode *inode) |
| 58 | { |
| 59 | fscache_invalidate(ceph_inode(inode)->fscache); |
| 60 | } |
| 61 | |
Milosz Tanski | d4d3aa3 | 2013-09-03 19:11:17 -0400 | [diff] [blame] | 62 | static inline void ceph_fscache_uncache_page(struct inode *inode, |
| 63 | struct page *page) |
| 64 | { |
| 65 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 66 | return fscache_uncache_page(ci->fscache, page); |
| 67 | } |
| 68 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 69 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
| 70 | { |
| 71 | struct inode* inode = page->mapping->host; |
| 72 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 73 | return fscache_maybe_release_page(ci->fscache, page, gfp); |
| 74 | } |
| 75 | |
Li Wang | 3f42bc4 | 2013-12-19 06:03:48 -0800 | [diff] [blame] | 76 | static inline void ceph_fscache_readpage_cancel(struct inode *inode, |
| 77 | struct page *page) |
| 78 | { |
| 79 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 80 | if (fscache_cookie_valid(ci->fscache) && PageFsCache(page)) |
| 81 | __fscache_uncache_page(ci->fscache, page); |
| 82 | } |
| 83 | |
Milosz Tanski | 76be778 | 2013-08-21 17:30:27 -0400 | [diff] [blame] | 84 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
| 85 | struct list_head *pages) |
| 86 | { |
| 87 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 88 | return fscache_readpages_cancel(ci->fscache, pages); |
| 89 | } |
| 90 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 91 | #else |
| 92 | |
| 93 | static inline int ceph_fscache_register(void) |
| 94 | { |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static inline void ceph_fscache_unregister(void) |
| 99 | { |
| 100 | } |
| 101 | |
| 102 | static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc) |
| 103 | { |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) |
| 108 | { |
| 109 | } |
| 110 | |
| 111 | static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) |
| 112 | { |
| 113 | } |
| 114 | |
| 115 | static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc, |
| 116 | struct ceph_inode_info* ci) |
| 117 | { |
| 118 | } |
| 119 | |
Milosz Tanski | d4d3aa3 | 2013-09-03 19:11:17 -0400 | [diff] [blame] | 120 | static inline void ceph_fscache_uncache_page(struct inode *inode, |
| 121 | struct page *pages) |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 122 | { |
| 123 | } |
| 124 | |
| 125 | static inline int ceph_readpage_from_fscache(struct inode* inode, |
| 126 | struct page *page) |
| 127 | { |
| 128 | return -ENOBUFS; |
| 129 | } |
| 130 | |
| 131 | static inline int ceph_readpages_from_fscache(struct inode *inode, |
| 132 | struct address_space *mapping, |
| 133 | struct list_head *pages, |
| 134 | unsigned *nr_pages) |
| 135 | { |
| 136 | return -ENOBUFS; |
| 137 | } |
| 138 | |
| 139 | static inline void ceph_readpage_to_fscache(struct inode *inode, |
| 140 | struct page *page) |
| 141 | { |
| 142 | } |
| 143 | |
Yunchuan Wen | 020c4bd | 2013-12-26 06:29:26 -0800 | [diff] [blame^] | 144 | static inline void ceph_fscache_update_objectsize(struct inode *inode) |
| 145 | { |
| 146 | } |
| 147 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 148 | static inline void ceph_fscache_invalidate(struct inode *inode) |
| 149 | { |
| 150 | } |
| 151 | |
| 152 | static inline void ceph_invalidate_fscache_page(struct inode *inode, |
| 153 | struct page *page) |
| 154 | { |
| 155 | } |
| 156 | |
Milosz Tanski | d4d3aa3 | 2013-09-03 19:11:17 -0400 | [diff] [blame] | 157 | static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) |
| 158 | { |
| 159 | } |
| 160 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 161 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
| 162 | { |
| 163 | return 1; |
| 164 | } |
| 165 | |
Li Wang | 3f42bc4 | 2013-12-19 06:03:48 -0800 | [diff] [blame] | 166 | static inline void ceph_fscache_readpage_cancel(struct inode *inode, |
| 167 | struct page *page) |
| 168 | { |
| 169 | } |
| 170 | |
Milosz Tanski | 99ccbd2 | 2013-08-21 17:29:54 -0400 | [diff] [blame] | 171 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
| 172 | struct list_head *pages) |
| 173 | { |
| 174 | } |
| 175 | |
| 176 | static inline void ceph_queue_revalidate(struct inode *inode) |
| 177 | { |
| 178 | } |
| 179 | |
| 180 | #endif |
| 181 | |
| 182 | #endif |