2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
18 #ifndef __XFS_INODE_H__
19 #define __XFS_INODE_H__
21 #include "xfs_inode_buf.h"
22 #include "xfs_inode_fork.h"
25 * Kernel only inode definitions
32 struct xfs_inode_log_item;
37 typedef struct xfs_inode {
38 /* Inode linking and identification information. */
39 struct xfs_mount *i_mount; /* fs mount struct ptr */
40 struct xfs_dquot *i_udquot; /* user dquot */
41 struct xfs_dquot *i_gdquot; /* group dquot */
42 struct xfs_dquot *i_pdquot; /* project dquot */
44 /* Inode location stuff */
45 xfs_ino_t i_ino; /* inode number (agno/agino)*/
46 struct xfs_imap i_imap; /* location for xfs_imap() */
48 /* Extent information. */
49 xfs_ifork_t *i_afp; /* attribute fork pointer */
50 xfs_ifork_t i_df; /* data fork */
52 /* operations vectors */
53 const struct xfs_dir_ops *d_ops; /* directory ops vector */
55 /* Transaction and locking information. */
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 */
59 atomic_t i_pincount; /* inode pin count */
60 spinlock_t i_flags_lock; /* inode i_flags lock */
61 /* Miscellaneous state. */
62 unsigned long i_flags; /* see defined flags below */
63 unsigned int i_delayed_blks; /* count of delay alloc blks */
65 xfs_icdinode_t i_d; /* most of ondisk inode */
68 struct inode i_vnode; /* embedded VFS inode */
71 /* Convert from vfs inode to xfs inode */
72 static inline struct xfs_inode *XFS_I(struct inode *inode)
74 return container_of(inode, struct xfs_inode, i_vnode);
77 /* convert from xfs inode to vfs inode */
78 static inline struct inode *VFS_I(struct xfs_inode *ip)
84 * For regular files we only update the on-disk filesize when actually
85 * writing data back to disk. Until then only the copy in the VFS inode
88 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
90 if (S_ISREG(ip->i_d.di_mode))
91 return i_size_read(VFS_I(ip));
92 return ip->i_d.di_size;
96 * If this I/O goes past the on-disk inode size update it unless it would
97 * be past the current in-core inode size.
99 static inline xfs_fsize_t
100 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
102 xfs_fsize_t i_size = i_size_read(VFS_I(ip));
104 if (new_size > i_size)
106 return new_size > ip->i_d.di_size ? new_size : 0;
110 * i_flags helper functions
113 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
115 ip->i_flags |= flags;
119 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
121 spin_lock(&ip->i_flags_lock);
122 __xfs_iflags_set(ip, flags);
123 spin_unlock(&ip->i_flags_lock);
127 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
129 spin_lock(&ip->i_flags_lock);
130 ip->i_flags &= ~flags;
131 spin_unlock(&ip->i_flags_lock);
135 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
137 return (ip->i_flags & flags);
141 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
144 spin_lock(&ip->i_flags_lock);
145 ret = __xfs_iflags_test(ip, flags);
146 spin_unlock(&ip->i_flags_lock);
151 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
155 spin_lock(&ip->i_flags_lock);
156 ret = ip->i_flags & flags;
158 ip->i_flags &= ~flags;
159 spin_unlock(&ip->i_flags_lock);
164 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
168 spin_lock(&ip->i_flags_lock);
169 ret = ip->i_flags & flags;
171 ip->i_flags |= flags;
172 spin_unlock(&ip->i_flags_lock);
177 * Project quota id helpers (previously projid was 16bit only
178 * and using two 16bit values to hold new 32bit projid was chosen
179 * to retain compatibility with "old" filesystems).
182 xfs_get_projid(struct xfs_inode *ip)
184 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
188 xfs_set_projid(struct xfs_inode *ip,
191 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
192 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
196 * In-core inode flags.
198 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
199 #define XFS_ISTALE (1 << 1) /* inode has been staled */
200 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
201 #define XFS_INEW (1 << 3) /* inode has just been allocated */
202 #define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
203 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
204 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
205 #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
206 #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
207 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
208 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
209 #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */
212 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
213 * inode lookup. This prevents unintended behaviour on the new inode from
216 #define XFS_IRECLAIM_RESET_FLAGS \
217 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
218 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
222 * Synchronize processes attempting to flush the in-core inode back to disk.
225 extern void __xfs_iflock(struct xfs_inode *ip);
227 static inline int xfs_iflock_nowait(struct xfs_inode *ip)
229 return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
232 static inline void xfs_iflock(struct xfs_inode *ip)
234 if (!xfs_iflock_nowait(ip))
238 static inline void xfs_ifunlock(struct xfs_inode *ip)
240 xfs_iflags_clear(ip, XFS_IFLOCK);
242 wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
245 static inline int xfs_isiflocked(struct xfs_inode *ip)
247 return xfs_iflags_test(ip, XFS_IFLOCK);
251 * Flags for inode locking.
252 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
253 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
255 #define XFS_IOLOCK_EXCL (1<<0)
256 #define XFS_IOLOCK_SHARED (1<<1)
257 #define XFS_ILOCK_EXCL (1<<2)
258 #define XFS_ILOCK_SHARED (1<<3)
260 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
261 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
263 #define XFS_LOCK_FLAGS \
264 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
265 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
266 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
267 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }
271 * Flags for lockdep annotations.
273 * XFS_LOCK_PARENT - for directory operations that require locking a
274 * parent directory inode and a child entry inode. The parent gets locked
275 * with this flag so it gets a lockdep subclass of 1 and the child entry
276 * lock will have a lockdep subclass of 0.
278 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
279 * inodes do not participate in the normal lock order, and thus have their
282 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
283 * with xfs_lock_inodes(). This flag is used as the starting subclass
284 * and each subsequent lock acquired will increment the subclass by one.
285 * So the first lock acquired will have a lockdep subclass of 4, the
286 * second lock will have a lockdep subclass of 5, and so on. It is
287 * the responsibility of the class builder to shift this to the correct
288 * portion of the lock_mode lockdep mask.
290 #define XFS_LOCK_PARENT 1
291 #define XFS_LOCK_RTBITMAP 2
292 #define XFS_LOCK_RTSUM 3
293 #define XFS_LOCK_INUMORDER 4
295 #define XFS_IOLOCK_SHIFT 16
296 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
298 #define XFS_ILOCK_SHIFT 24
299 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
300 #define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
301 #define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
303 #define XFS_IOLOCK_DEP_MASK 0x00ff0000
304 #define XFS_ILOCK_DEP_MASK 0xff000000
305 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
307 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
308 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
311 * For multiple groups support: if S_ISGID bit is set in the parent
312 * directory, group of new file is set to that of the parent, and
313 * new subdirectory gets S_ISGID bit from parent.
315 #define XFS_INHERIT_GID(pip) \
316 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
317 ((pip)->i_d.di_mode & S_ISGID))
320 int xfs_release(struct xfs_inode *ip);
321 void xfs_inactive(struct xfs_inode *ip);
322 int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name,
323 struct xfs_inode **ipp, struct xfs_name *ci_name);
324 int xfs_create(struct xfs_inode *dp, struct xfs_name *name,
325 umode_t mode, xfs_dev_t rdev, struct xfs_inode **ipp);
326 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
327 struct xfs_inode *ip);
328 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
329 struct xfs_name *target_name);
330 int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name,
331 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
332 struct xfs_name *target_name,
333 struct xfs_inode *target_ip);
335 void xfs_ilock(xfs_inode_t *, uint);
336 int xfs_ilock_nowait(xfs_inode_t *, uint);
337 void xfs_iunlock(xfs_inode_t *, uint);
338 void xfs_ilock_demote(xfs_inode_t *, uint);
339 int xfs_isilocked(xfs_inode_t *, uint);
340 uint xfs_ilock_map_shared(xfs_inode_t *);
341 void xfs_iunlock_map_shared(xfs_inode_t *, uint);
342 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
343 xfs_nlink_t, xfs_dev_t, prid_t, int,
344 struct xfs_buf **, xfs_inode_t **);
346 uint xfs_ip2xflags(struct xfs_inode *);
347 uint xfs_dic2xflags(struct xfs_dinode *);
348 int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
349 struct xfs_bmap_free *);
350 int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
352 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
354 void xfs_iext_realloc(xfs_inode_t *, int, int);
356 void xfs_iunpin_wait(xfs_inode_t *);
357 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
359 int xfs_iflush(struct xfs_inode *, struct xfs_buf **);
360 void xfs_lock_inodes(xfs_inode_t **, int, uint);
361 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
363 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
365 int xfs_dir_ialloc(struct xfs_trans **, struct xfs_inode *, umode_t,
366 xfs_nlink_t, xfs_dev_t, prid_t, int,
367 struct xfs_inode **, int *);
368 int xfs_droplink(struct xfs_trans *, struct xfs_inode *);
369 int xfs_bumplink(struct xfs_trans *, struct xfs_inode *);
370 void xfs_bump_ino_vers2(struct xfs_trans *, struct xfs_inode *);
372 /* from xfs_file.c */
373 int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t);
374 int xfs_iozero(struct xfs_inode *, loff_t, size_t);
379 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
381 trace_xfs_ihold(ip, _THIS_IP_); \
386 trace_xfs_irele(ip, _THIS_IP_); \
390 extern struct kmem_zone *xfs_inode_zone;
392 #endif /* __XFS_INODE_H__ */