Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
| 18 | #ifndef __XFS_INODE_H__ |
| 19 | #define __XFS_INODE_H__ |
| 20 | |
Dave Chinner | 1fd7115 | 2013-08-12 20:49:35 +1000 | [diff] [blame] | 21 | #include "xfs_inode_buf.h" |
Dave Chinner | 5c4d97d | 2013-08-12 20:49:33 +1000 | [diff] [blame] | 22 | #include "xfs_inode_fork.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | /* |
Dave Chinner | 1fd7115 | 2013-08-12 20:49:35 +1000 | [diff] [blame] | 25 | * Kernel only inode definitions |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 26 | */ |
Dave Chinner | 1fd7115 | 2013-08-12 20:49:35 +1000 | [diff] [blame] | 27 | struct xfs_dinode; |
| 28 | struct xfs_inode; |
Barry Naujok | 847fff5 | 2008-10-30 17:05:38 +1100 | [diff] [blame] | 29 | struct xfs_buf; |
| 30 | struct xfs_bmap_free; |
| 31 | struct xfs_bmbt_irec; |
Barry Naujok | 847fff5 | 2008-10-30 17:05:38 +1100 | [diff] [blame] | 32 | struct xfs_inode_log_item; |
| 33 | struct xfs_mount; |
| 34 | struct xfs_trans; |
| 35 | struct xfs_dquot; |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | typedef struct xfs_inode { |
| 38 | /* Inode linking and identification information. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | struct xfs_mount *i_mount; /* fs mount struct ptr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | struct xfs_dquot *i_udquot; /* user dquot */ |
| 41 | struct xfs_dquot *i_gdquot; /* group dquot */ |
Chandra Seetharaman | 92f8ff7 | 2013-07-11 00:00:40 -0500 | [diff] [blame] | 42 | struct xfs_dquot *i_pdquot; /* project dquot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | /* Inode location stuff */ |
| 45 | xfs_ino_t i_ino; /* inode number (agno/agino)*/ |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 46 | struct xfs_imap i_imap; /* location for xfs_imap() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | /* Extent information. */ |
| 49 | xfs_ifork_t *i_afp; /* attribute fork pointer */ |
| 50 | xfs_ifork_t i_df; /* data fork */ |
| 51 | |
Dave Chinner | 32c5483 | 2013-10-29 22:11:46 +1100 | [diff] [blame] | 52 | /* operations vectors */ |
| 53 | const struct xfs_dir_ops *d_ops; /* directory ops vector */ |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* Transaction and locking information. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | struct xfs_inode_log_item *i_itemp; /* logging information */ |
| 57 | mrlock_t i_lock; /* inode lock */ |
| 58 | mrlock_t i_iolock; /* inode IO lock */ |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 59 | mrlock_t i_mmaplock; /* inode mmap IO lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | atomic_t i_pincount; /* inode pin count */ |
David Chinner | f273ab8 | 2006-09-28 11:06:03 +1000 | [diff] [blame] | 61 | spinlock_t i_flags_lock; /* inode i_flags lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | /* Miscellaneous state. */ |
Christoph Hellwig | 49e4c70 | 2011-12-18 20:00:08 +0000 | [diff] [blame] | 63 | unsigned long i_flags; /* see defined flags below */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | unsigned int i_delayed_blks; /* count of delay alloc blks */ |
| 65 | |
Dave Chinner | f8d55aa052 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 66 | struct xfs_icdinode i_d; /* most of ondisk inode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 68 | /* VFS inode */ |
| 69 | struct inode i_vnode; /* embedded VFS inode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | } xfs_inode_t; |
| 71 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 72 | /* Convert from vfs inode to xfs inode */ |
| 73 | static inline struct xfs_inode *XFS_I(struct inode *inode) |
| 74 | { |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 75 | return container_of(inode, struct xfs_inode, i_vnode); |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 76 | } |
| 77 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 78 | /* convert from xfs inode to vfs inode */ |
| 79 | static inline struct inode *VFS_I(struct xfs_inode *ip) |
| 80 | { |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 81 | return &ip->i_vnode; |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 82 | } |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 83 | |
David Chinner | 7a18c38 | 2006-11-11 18:04:54 +1100 | [diff] [blame] | 84 | /* |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 85 | * For regular files we only update the on-disk filesize when actually |
| 86 | * writing data back to disk. Until then only the copy in the VFS inode |
| 87 | * is uptodate. |
| 88 | */ |
| 89 | static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) |
| 90 | { |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 91 | if (S_ISREG(VFS_I(ip)->i_mode)) |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 92 | return i_size_read(VFS_I(ip)); |
| 93 | return ip->i_d.di_size; |
| 94 | } |
| 95 | |
| 96 | /* |
Christoph Hellwig | 6923e68 | 2012-02-29 09:53:49 +0000 | [diff] [blame] | 97 | * If this I/O goes past the on-disk inode size update it unless it would |
| 98 | * be past the current in-core inode size. |
| 99 | */ |
| 100 | static inline xfs_fsize_t |
| 101 | xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) |
| 102 | { |
| 103 | xfs_fsize_t i_size = i_size_read(VFS_I(ip)); |
| 104 | |
Brian Foster | ce57bcf | 2014-10-02 09:21:53 +1000 | [diff] [blame] | 105 | if (new_size > i_size || new_size < 0) |
Christoph Hellwig | 6923e68 | 2012-02-29 09:53:49 +0000 | [diff] [blame] | 106 | new_size = i_size; |
| 107 | return new_size > ip->i_d.di_size ? new_size : 0; |
| 108 | } |
| 109 | |
| 110 | /* |
David Chinner | 7a18c38 | 2006-11-11 18:04:54 +1100 | [diff] [blame] | 111 | * i_flags helper functions |
| 112 | */ |
| 113 | static inline void |
| 114 | __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) |
| 115 | { |
| 116 | ip->i_flags |= flags; |
| 117 | } |
| 118 | |
| 119 | static inline void |
| 120 | xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) |
| 121 | { |
| 122 | spin_lock(&ip->i_flags_lock); |
| 123 | __xfs_iflags_set(ip, flags); |
| 124 | spin_unlock(&ip->i_flags_lock); |
| 125 | } |
| 126 | |
| 127 | static inline void |
| 128 | xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags) |
| 129 | { |
| 130 | spin_lock(&ip->i_flags_lock); |
| 131 | ip->i_flags &= ~flags; |
| 132 | spin_unlock(&ip->i_flags_lock); |
| 133 | } |
| 134 | |
| 135 | static inline int |
| 136 | __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) |
| 137 | { |
| 138 | return (ip->i_flags & flags); |
| 139 | } |
| 140 | |
| 141 | static inline int |
| 142 | xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) |
| 143 | { |
| 144 | int ret; |
| 145 | spin_lock(&ip->i_flags_lock); |
| 146 | ret = __xfs_iflags_test(ip, flags); |
| 147 | spin_unlock(&ip->i_flags_lock); |
| 148 | return ret; |
| 149 | } |
Christoph Hellwig | 09262b4 | 2007-08-29 11:44:50 +1000 | [diff] [blame] | 150 | |
| 151 | static inline int |
| 152 | xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) |
| 153 | { |
| 154 | int ret; |
| 155 | |
| 156 | spin_lock(&ip->i_flags_lock); |
| 157 | ret = ip->i_flags & flags; |
| 158 | if (ret) |
| 159 | ip->i_flags &= ~flags; |
| 160 | spin_unlock(&ip->i_flags_lock); |
| 161 | return ret; |
| 162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Christoph Hellwig | 474fce0 | 2011-12-18 20:00:09 +0000 | [diff] [blame] | 164 | static inline int |
| 165 | xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags) |
| 166 | { |
| 167 | int ret; |
| 168 | |
| 169 | spin_lock(&ip->i_flags_lock); |
| 170 | ret = ip->i_flags & flags; |
| 171 | if (!ret) |
| 172 | ip->i_flags |= flags; |
| 173 | spin_unlock(&ip->i_flags_lock); |
| 174 | return ret; |
| 175 | } |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | /* |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 178 | * Project quota id helpers (previously projid was 16bit only |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 179 | * and using two 16bit values to hold new 32bit projid was chosen |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 180 | * to retain compatibility with "old" filesystems). |
| 181 | */ |
| 182 | static inline prid_t |
| 183 | xfs_get_projid(struct xfs_inode *ip) |
| 184 | { |
| 185 | return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo; |
| 186 | } |
| 187 | |
| 188 | static inline void |
| 189 | xfs_set_projid(struct xfs_inode *ip, |
| 190 | prid_t projid) |
| 191 | { |
| 192 | ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16); |
| 193 | ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff); |
| 194 | } |
| 195 | |
Zhi Yong Wu | 163467d | 2013-12-18 08:22:39 +0800 | [diff] [blame] | 196 | static inline prid_t |
| 197 | xfs_get_initial_prid(struct xfs_inode *dp) |
| 198 | { |
| 199 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| 200 | return xfs_get_projid(dp); |
| 201 | |
| 202 | return XFS_PROJID_DEFAULT; |
| 203 | } |
| 204 | |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 205 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | * In-core inode flags. |
| 207 | */ |
Christoph Hellwig | 474fce0 | 2011-12-18 20:00:09 +0000 | [diff] [blame] | 208 | #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ |
| 209 | #define XFS_ISTALE (1 << 1) /* inode has been staled */ |
| 210 | #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ |
| 211 | #define XFS_INEW (1 << 3) /* inode has just been allocated */ |
Christoph Hellwig | 474fce0 | 2011-12-18 20:00:09 +0000 | [diff] [blame] | 212 | #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ |
| 213 | #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */ |
| 214 | #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */ |
| 215 | #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT) |
Christoph Hellwig | f392e63 | 2011-12-18 20:00:10 +0000 | [diff] [blame] | 216 | #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ |
| 217 | #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) |
Dave Chinner | 5132ba8 | 2012-03-22 05:15:10 +0000 | [diff] [blame] | 218 | #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | /* |
Dave Chinner | 778e24b | 2011-06-23 01:34:59 +0000 | [diff] [blame] | 221 | * Per-lifetime flags need to be reset when re-using a reclaimable inode during |
Dave Chinner | 5132ba8 | 2012-03-22 05:15:10 +0000 | [diff] [blame] | 222 | * inode lookup. This prevents unintended behaviour on the new inode from |
Dave Chinner | 778e24b | 2011-06-23 01:34:59 +0000 | [diff] [blame] | 223 | * ocurring. |
| 224 | */ |
| 225 | #define XFS_IRECLAIM_RESET_FLAGS \ |
| 226 | (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ |
Christoph Hellwig | f37211c | 2014-04-23 07:11:51 +1000 | [diff] [blame] | 227 | XFS_IDIRTY_RELEASE | XFS_ITRUNCATED) |
Dave Chinner | 778e24b | 2011-06-23 01:34:59 +0000 | [diff] [blame] | 228 | |
| 229 | /* |
Christoph Hellwig | 474fce0 | 2011-12-18 20:00:09 +0000 | [diff] [blame] | 230 | * Synchronize processes attempting to flush the in-core inode back to disk. |
| 231 | */ |
| 232 | |
| 233 | extern void __xfs_iflock(struct xfs_inode *ip); |
| 234 | |
| 235 | static inline int xfs_iflock_nowait(struct xfs_inode *ip) |
| 236 | { |
| 237 | return !xfs_iflags_test_and_set(ip, XFS_IFLOCK); |
| 238 | } |
| 239 | |
| 240 | static inline void xfs_iflock(struct xfs_inode *ip) |
| 241 | { |
| 242 | if (!xfs_iflock_nowait(ip)) |
| 243 | __xfs_iflock(ip); |
| 244 | } |
| 245 | |
| 246 | static inline void xfs_ifunlock(struct xfs_inode *ip) |
| 247 | { |
| 248 | xfs_iflags_clear(ip, XFS_IFLOCK); |
Alex Elder | 311f08a | 2013-02-04 10:13:11 -0600 | [diff] [blame] | 249 | smp_mb(); |
Christoph Hellwig | 474fce0 | 2011-12-18 20:00:09 +0000 | [diff] [blame] | 250 | wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT); |
| 251 | } |
| 252 | |
| 253 | static inline int xfs_isiflocked(struct xfs_inode *ip) |
| 254 | { |
| 255 | return xfs_iflags_test(ip, XFS_IFLOCK); |
| 256 | } |
| 257 | |
| 258 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | * Flags for inode locking. |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 260 | * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) |
| 261 | * 1<<16 - 1<<32-1 -- lockdep annotation (integers) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | */ |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 263 | #define XFS_IOLOCK_EXCL (1<<0) |
| 264 | #define XFS_IOLOCK_SHARED (1<<1) |
| 265 | #define XFS_ILOCK_EXCL (1<<2) |
| 266 | #define XFS_ILOCK_SHARED (1<<3) |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 267 | #define XFS_MMAPLOCK_EXCL (1<<4) |
| 268 | #define XFS_MMAPLOCK_SHARED (1<<5) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 270 | #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 271 | | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \ |
| 272 | | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED) |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 273 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 274 | #define XFS_LOCK_FLAGS \ |
| 275 | { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ |
| 276 | { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ |
| 277 | { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 278 | { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \ |
| 279 | { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \ |
| 280 | { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" } |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 281 | |
| 282 | |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 283 | /* |
| 284 | * Flags for lockdep annotations. |
| 285 | * |
Christoph Hellwig | 9681153 | 2011-01-25 09:06:21 +0000 | [diff] [blame] | 286 | * XFS_LOCK_PARENT - for directory operations that require locking a |
Dave Chinner | 0952c81 | 2015-08-19 10:32:49 +1000 | [diff] [blame] | 287 | * parent directory inode and a child entry inode. IOLOCK requires nesting, |
| 288 | * MMAPLOCK does not support this class, ILOCK requires a single subclass |
| 289 | * to differentiate parent from child. |
Christoph Hellwig | 9681153 | 2011-01-25 09:06:21 +0000 | [diff] [blame] | 290 | * |
| 291 | * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary |
| 292 | * inodes do not participate in the normal lock order, and thus have their |
| 293 | * own subclasses. |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 294 | * |
David Chinner | 0f1145c | 2007-06-29 17:26:09 +1000 | [diff] [blame] | 295 | * XFS_LOCK_INUMORDER - for locking several inodes at the some time |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 296 | * with xfs_lock_inodes(). This flag is used as the starting subclass |
| 297 | * and each subsequent lock acquired will increment the subclass by one. |
Dave Chinner | 0952c81 | 2015-08-19 10:32:49 +1000 | [diff] [blame] | 298 | * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly |
| 299 | * limited to the subclasses we can represent via nesting. We need at least |
| 300 | * 5 inodes nest depth for the ILOCK through rename, and we also have to support |
| 301 | * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP |
| 302 | * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all |
| 303 | * 8 subclasses supported by lockdep. |
| 304 | * |
| 305 | * This also means we have to number the sub-classes in the lowest bits of |
| 306 | * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep |
| 307 | * mask and we can't use bit-masking to build the subclasses. What a mess. |
| 308 | * |
| 309 | * Bit layout: |
| 310 | * |
| 311 | * Bit Lock Region |
| 312 | * 16-19 XFS_IOLOCK_SHIFT dependencies |
| 313 | * 20-23 XFS_MMAPLOCK_SHIFT dependencies |
| 314 | * 24-31 XFS_ILOCK_SHIFT dependencies |
| 315 | * |
| 316 | * IOLOCK values |
| 317 | * |
| 318 | * 0-3 subclass value |
| 319 | * 4-7 PARENT subclass values |
| 320 | * |
| 321 | * MMAPLOCK values |
| 322 | * |
| 323 | * 0-3 subclass value |
| 324 | * 4-7 unused |
| 325 | * |
| 326 | * ILOCK values |
| 327 | * 0-4 subclass values |
| 328 | * 5 PARENT subclass (not nestable) |
| 329 | * 6 RTBITMAP subclass (not nestable) |
| 330 | * 7 RTSUM subclass (not nestable) |
| 331 | * |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 332 | */ |
Dave Chinner | 0952c81 | 2015-08-19 10:32:49 +1000 | [diff] [blame] | 333 | #define XFS_IOLOCK_SHIFT 16 |
| 334 | #define XFS_IOLOCK_PARENT_VAL 4 |
| 335 | #define XFS_IOLOCK_MAX_SUBCLASS (XFS_IOLOCK_PARENT_VAL - 1) |
| 336 | #define XFS_IOLOCK_DEP_MASK 0x000f0000 |
| 337 | #define XFS_IOLOCK_PARENT (XFS_IOLOCK_PARENT_VAL << XFS_IOLOCK_SHIFT) |
David Chinner | 0f1145c | 2007-06-29 17:26:09 +1000 | [diff] [blame] | 338 | |
Dave Chinner | 0952c81 | 2015-08-19 10:32:49 +1000 | [diff] [blame] | 339 | #define XFS_MMAPLOCK_SHIFT 20 |
| 340 | #define XFS_MMAPLOCK_NUMORDER 0 |
| 341 | #define XFS_MMAPLOCK_MAX_SUBCLASS 3 |
| 342 | #define XFS_MMAPLOCK_DEP_MASK 0x00f00000 |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 343 | |
Dave Chinner | 0952c81 | 2015-08-19 10:32:49 +1000 | [diff] [blame] | 344 | #define XFS_ILOCK_SHIFT 24 |
| 345 | #define XFS_ILOCK_PARENT_VAL 5 |
| 346 | #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1) |
| 347 | #define XFS_ILOCK_RTBITMAP_VAL 6 |
| 348 | #define XFS_ILOCK_RTSUM_VAL 7 |
| 349 | #define XFS_ILOCK_DEP_MASK 0xff000000 |
| 350 | #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT) |
| 351 | #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT) |
| 352 | #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT) |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 353 | |
Dave Chinner | 0952c81 | 2015-08-19 10:32:49 +1000 | [diff] [blame] | 354 | #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \ |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 355 | XFS_MMAPLOCK_DEP_MASK | \ |
| 356 | XFS_ILOCK_DEP_MASK) |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 357 | |
Dave Chinner | 653c60b | 2015-02-23 21:43:37 +1100 | [diff] [blame] | 358 | #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \ |
| 359 | >> XFS_IOLOCK_SHIFT) |
| 360 | #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \ |
| 361 | >> XFS_MMAPLOCK_SHIFT) |
| 362 | #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \ |
| 363 | >> XFS_ILOCK_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
| 365 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | * For multiple groups support: if S_ISGID bit is set in the parent |
| 367 | * directory, group of new file is set to that of the parent, and |
| 368 | * new subdirectory gets S_ISGID bit from parent. |
| 369 | */ |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 370 | #define XFS_INHERIT_GID(pip) \ |
| 371 | (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \ |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 372 | (VFS_I(pip)->i_mode & S_ISGID)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 374 | int xfs_release(struct xfs_inode *ip); |
Brian Foster | 74564fb | 2013-09-20 11:06:12 -0400 | [diff] [blame] | 375 | void xfs_inactive(struct xfs_inode *ip); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 376 | int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name, |
| 377 | struct xfs_inode **ipp, struct xfs_name *ci_name); |
| 378 | int xfs_create(struct xfs_inode *dp, struct xfs_name *name, |
| 379 | umode_t mode, xfs_dev_t rdev, struct xfs_inode **ipp); |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 380 | int xfs_create_tmpfile(struct xfs_inode *dp, struct dentry *dentry, |
Brian Foster | 330033d | 2014-04-17 08:15:30 +1000 | [diff] [blame] | 381 | umode_t mode, struct xfs_inode **ipp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 382 | int xfs_remove(struct xfs_inode *dp, struct xfs_name *name, |
| 383 | struct xfs_inode *ip); |
| 384 | int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip, |
| 385 | struct xfs_name *target_name); |
| 386 | int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name, |
| 387 | struct xfs_inode *src_ip, struct xfs_inode *target_dp, |
| 388 | struct xfs_name *target_name, |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 389 | struct xfs_inode *target_ip, unsigned int flags); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | void xfs_ilock(xfs_inode_t *, uint); |
| 392 | int xfs_ilock_nowait(xfs_inode_t *, uint); |
| 393 | void xfs_iunlock(xfs_inode_t *, uint); |
| 394 | void xfs_ilock_demote(xfs_inode_t *, uint); |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 395 | int xfs_isilocked(xfs_inode_t *, uint); |
Christoph Hellwig | 309ecac | 2013-12-06 12:30:09 -0800 | [diff] [blame] | 396 | uint xfs_ilock_data_map_shared(struct xfs_inode *); |
Christoph Hellwig | efa70be | 2013-12-18 02:14:39 -0800 | [diff] [blame] | 397 | uint xfs_ilock_attr_map_shared(struct xfs_inode *); |
Al Viro | 576b1d6 | 2011-07-26 02:50:15 -0400 | [diff] [blame] | 398 | int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t, |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 399 | xfs_nlink_t, xfs_dev_t, prid_t, int, |
Christoph Hellwig | 0835890 | 2012-07-04 10:54:47 -0400 | [diff] [blame] | 400 | struct xfs_buf **, xfs_inode_t **); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | uint xfs_ip2xflags(struct xfs_inode *); |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 403 | uint xfs_dic2xflags(struct xfs_dinode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | int xfs_ifree(struct xfs_trans *, xfs_inode_t *, |
| 405 | struct xfs_bmap_free *); |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 406 | int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *, |
| 407 | int, xfs_fsize_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | void xfs_iext_realloc(xfs_inode_t *, int, int); |
Dave Chinner | 1fd7115 | 2013-08-12 20:49:35 +1000 | [diff] [blame] | 409 | |
Dave Chinner | 777df5a | 2010-02-06 12:37:26 +1100 | [diff] [blame] | 410 | void xfs_iunpin_wait(xfs_inode_t *); |
Dave Chinner | 1fd7115 | 2013-08-12 20:49:35 +1000 | [diff] [blame] | 411 | #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) |
| 412 | |
Christoph Hellwig | 4c46819 | 2012-04-23 15:58:36 +1000 | [diff] [blame] | 413 | int xfs_iflush(struct xfs_inode *, struct xfs_buf **); |
Christoph Hellwig | cfa853e | 2008-04-22 17:34:06 +1000 | [diff] [blame] | 414 | void xfs_lock_inodes(xfs_inode_t **, int, uint); |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 415 | void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
Dave Chinner | 2a0ec1d | 2012-04-23 15:59:02 +1000 | [diff] [blame] | 417 | xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); |
| 418 | |
Dave Chinner | e546cb7 | 2013-08-12 20:49:47 +1000 | [diff] [blame] | 419 | int xfs_dir_ialloc(struct xfs_trans **, struct xfs_inode *, umode_t, |
| 420 | xfs_nlink_t, xfs_dev_t, prid_t, int, |
| 421 | struct xfs_inode **, int *); |
| 422 | int xfs_droplink(struct xfs_trans *, struct xfs_inode *); |
| 423 | int xfs_bumplink(struct xfs_trans *, struct xfs_inode *); |
Dave Chinner | e546cb7 | 2013-08-12 20:49:47 +1000 | [diff] [blame] | 424 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 425 | /* from xfs_file.c */ |
Christoph Hellwig | 8add71c | 2015-02-02 09:53:56 +1100 | [diff] [blame] | 426 | enum xfs_prealloc_flags { |
| 427 | XFS_PREALLOC_SET = (1 << 1), |
| 428 | XFS_PREALLOC_CLEAR = (1 << 2), |
| 429 | XFS_PREALLOC_SYNC = (1 << 3), |
| 430 | XFS_PREALLOC_INVISIBLE = (1 << 4), |
| 431 | }; |
| 432 | |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 433 | int xfs_update_prealloc_flags(struct xfs_inode *ip, |
| 434 | enum xfs_prealloc_flags flags); |
| 435 | int xfs_zero_eof(struct xfs_inode *ip, xfs_off_t offset, |
| 436 | xfs_fsize_t isize, bool *did_zeroing); |
| 437 | int xfs_iozero(struct xfs_inode *ip, loff_t pos, size_t count); |
Eric Sandeen | 8aa7d37 | 2016-02-08 11:25:16 +1100 | [diff] [blame] | 438 | loff_t __xfs_seek_hole_data(struct inode *inode, loff_t start, |
| 439 | loff_t eof, int whence); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 440 | |
| 441 | |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 442 | /* from xfs_iops.c */ |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 443 | extern void xfs_setup_inode(struct xfs_inode *ip); |
| 444 | extern void xfs_setup_iops(struct xfs_inode *ip); |
| 445 | |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 446 | /* |
| 447 | * When setting up a newly allocated inode, we need to call |
| 448 | * xfs_finish_inode_setup() once the inode is fully instantiated at |
| 449 | * the VFS level to prevent the rest of the world seeing the inode |
| 450 | * before we've completed instantiation. Otherwise we can do it |
| 451 | * the moment the inode lookup is complete. |
| 452 | */ |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 453 | static inline void xfs_finish_inode_setup(struct xfs_inode *ip) |
| 454 | { |
| 455 | xfs_iflags_clear(ip, XFS_INEW); |
| 456 | barrier(); |
| 457 | unlock_new_inode(VFS_I(ip)); |
| 458 | } |
| 459 | |
| 460 | static inline void xfs_setup_existing_inode(struct xfs_inode *ip) |
| 461 | { |
| 462 | xfs_setup_inode(ip); |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 463 | xfs_setup_iops(ip); |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 464 | xfs_finish_inode_setup(ip); |
| 465 | } |
| 466 | |
Christoph Hellwig | 5a8d0f3 | 2008-12-03 12:20:40 +0100 | [diff] [blame] | 467 | #define IHOLD(ip) \ |
| 468 | do { \ |
| 469 | ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 470 | ihold(VFS_I(ip)); \ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 471 | trace_xfs_ihold(ip, _THIS_IP_); \ |
Christoph Hellwig | 5a8d0f3 | 2008-12-03 12:20:40 +0100 | [diff] [blame] | 472 | } while (0) |
| 473 | |
| 474 | #define IRELE(ip) \ |
| 475 | do { \ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 476 | trace_xfs_irele(ip, _THIS_IP_); \ |
Christoph Hellwig | 5a8d0f3 | 2008-12-03 12:20:40 +0100 | [diff] [blame] | 477 | iput(VFS_I(ip)); \ |
| 478 | } while (0) |
| 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | extern struct kmem_zone *xfs_inode_zone; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Dave Chinner | b92cc59f6 | 2014-08-04 13:28:20 +1000 | [diff] [blame] | 482 | /* |
| 483 | * Flags for read/write calls |
| 484 | */ |
| 485 | #define XFS_IO_ISDIRECT 0x00001 /* bypass page cache */ |
| 486 | #define XFS_IO_INVIS 0x00002 /* don't update inode timestamps */ |
| 487 | |
| 488 | #define XFS_IO_FLAGS \ |
| 489 | { XFS_IO_ISDIRECT, "DIRECT" }, \ |
| 490 | { XFS_IO_INVIS, "INVIS"} |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | #endif /* __XFS_INODE_H__ */ |