1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
6 #ifndef __XFS_INODE_H__
7 #define __XFS_INODE_H__
9 #include "xfs_inode_buf.h"
10 #include "xfs_inode_fork.h"
13 * Kernel only inode definitions
19 struct xfs_inode_log_item;
24 typedef struct xfs_inode {
25 /* Inode linking and identification information. */
26 struct xfs_mount *i_mount; /* fs mount struct ptr */
27 struct xfs_dquot *i_udquot; /* user dquot */
28 struct xfs_dquot *i_gdquot; /* group dquot */
29 struct xfs_dquot *i_pdquot; /* project dquot */
31 /* Inode location stuff */
32 xfs_ino_t i_ino; /* inode number (agno/agino)*/
33 struct xfs_imap i_imap; /* location for xfs_imap() */
35 /* Extent information. */
36 struct xfs_ifork *i_afp; /* attribute fork pointer */
37 struct xfs_ifork *i_cowfp; /* copy on write extents */
38 struct xfs_ifork i_df; /* data fork */
40 /* Transaction and locking information. */
41 struct xfs_inode_log_item *i_itemp; /* logging information */
42 mrlock_t i_lock; /* inode lock */
43 atomic_t i_pincount; /* inode pin count */
46 * Bitsets of inode metadata that have been checked and/or are sick.
47 * Callers must hold i_flags_lock before accessing this field.
52 spinlock_t i_flags_lock; /* inode i_flags lock */
53 /* Miscellaneous state. */
54 unsigned long i_flags; /* see defined flags below */
55 uint64_t i_delayed_blks; /* count of delay alloc blks */
56 xfs_fsize_t i_disk_size; /* number of bytes in file */
57 xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */
58 prid_t i_projid; /* owner's project id */
59 xfs_extlen_t i_extsize; /* basic/minimum extent size */
60 /* cowextsize is only used for v3 inodes, flushiter for v1/2 */
62 xfs_extlen_t i_cowextsize; /* basic cow extent size */
63 uint16_t i_flushiter; /* incremented on flush */
65 uint8_t i_forkoff; /* attr fork offset >> 3 */
66 uint16_t i_diflags; /* XFS_DIFLAG_... */
67 uint64_t i_diflags2; /* XFS_DIFLAG2_... */
68 struct timespec64 i_crtime; /* time created */
71 struct inode i_vnode; /* embedded VFS inode */
73 /* pending io completions */
74 spinlock_t i_ioend_lock;
75 struct work_struct i_ioend_work;
76 struct list_head i_ioend_list;
79 /* Convert from vfs inode to xfs inode */
80 static inline struct xfs_inode *XFS_I(struct inode *inode)
82 return container_of(inode, struct xfs_inode, i_vnode);
85 /* convert from xfs inode to vfs inode */
86 static inline struct inode *VFS_I(struct xfs_inode *ip)
92 * For regular files we only update the on-disk filesize when actually
93 * writing data back to disk. Until then only the copy in the VFS inode
96 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
98 if (S_ISREG(VFS_I(ip)->i_mode))
99 return i_size_read(VFS_I(ip));
100 return ip->i_disk_size;
104 * If this I/O goes past the on-disk inode size update it unless it would
105 * be past the current in-core inode size.
107 static inline xfs_fsize_t
108 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
110 xfs_fsize_t i_size = i_size_read(VFS_I(ip));
112 if (new_size > i_size || new_size < 0)
114 return new_size > ip->i_disk_size ? new_size : 0;
118 * i_flags helper functions
121 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
123 ip->i_flags |= flags;
127 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
129 spin_lock(&ip->i_flags_lock);
130 __xfs_iflags_set(ip, flags);
131 spin_unlock(&ip->i_flags_lock);
135 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
137 spin_lock(&ip->i_flags_lock);
138 ip->i_flags &= ~flags;
139 spin_unlock(&ip->i_flags_lock);
143 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
145 return (ip->i_flags & flags);
149 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
152 spin_lock(&ip->i_flags_lock);
153 ret = __xfs_iflags_test(ip, flags);
154 spin_unlock(&ip->i_flags_lock);
159 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
163 spin_lock(&ip->i_flags_lock);
164 ret = ip->i_flags & flags;
166 ip->i_flags &= ~flags;
167 spin_unlock(&ip->i_flags_lock);
172 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
176 spin_lock(&ip->i_flags_lock);
177 ret = ip->i_flags & flags;
179 ip->i_flags |= flags;
180 spin_unlock(&ip->i_flags_lock);
185 xfs_get_initial_prid(struct xfs_inode *dp)
187 if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT)
190 return XFS_PROJID_DEFAULT;
193 static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
195 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
198 static inline bool xfs_is_metadata_inode(struct xfs_inode *ip)
200 struct xfs_mount *mp = ip->i_mount;
202 return ip == mp->m_rbmip || ip == mp->m_rsumip ||
203 xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
207 * Check if an inode has any data in the COW fork. This might be often false
208 * even for inodes with the reflink flag when there is no pending COW operation.
210 static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
212 return ip->i_cowfp && ip->i_cowfp->if_bytes;
215 static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
217 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
221 * Return the buftarg used for data allocations on a given inode.
223 #define xfs_inode_buftarg(ip) \
224 (XFS_IS_REALTIME_INODE(ip) ? \
225 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
228 * In-core inode flags.
230 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
231 #define XFS_ISTALE (1 << 1) /* inode has been staled */
232 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
233 #define __XFS_INEW_BIT 3 /* inode has just been allocated */
234 #define XFS_INEW (1 << __XFS_INEW_BIT)
235 #define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
236 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
237 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
238 #define XFS_IFLUSHING (1 << 7) /* inode is being flushed */
239 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
240 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
241 #define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */
243 * If this unlinked inode is in the middle of recovery, don't let drop_inode
244 * truncate and free the inode. This can happen if we iget the inode during
245 * log recovery to replay a bmap operation on the inode.
247 #define XFS_IRECOVERY (1 << 11)
248 #define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */
251 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
252 * inode lookup. This prevents unintended behaviour on the new inode from
255 #define XFS_IRECLAIM_RESET_FLAGS \
256 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
257 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED)
260 * Flags for inode locking.
261 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
262 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
264 #define XFS_IOLOCK_EXCL (1<<0)
265 #define XFS_IOLOCK_SHARED (1<<1)
266 #define XFS_ILOCK_EXCL (1<<2)
267 #define XFS_ILOCK_SHARED (1<<3)
268 #define XFS_MMAPLOCK_EXCL (1<<4)
269 #define XFS_MMAPLOCK_SHARED (1<<5)
271 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
272 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
273 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
275 #define XFS_LOCK_FLAGS \
276 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
277 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
278 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
279 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
280 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \
281 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" }
285 * Flags for lockdep annotations.
287 * XFS_LOCK_PARENT - for directory operations that require locking a
288 * parent directory inode and a child entry inode. IOLOCK requires nesting,
289 * MMAPLOCK does not support this class, ILOCK requires a single subclass
290 * to differentiate parent from child.
292 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
293 * inodes do not participate in the normal lock order, and thus have their
296 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
297 * with xfs_lock_inodes(). This flag is used as the starting subclass
298 * and each subsequent lock acquired will increment the subclass by one.
299 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
300 * limited to the subclasses we can represent via nesting. We need at least
301 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
302 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
303 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
304 * 8 subclasses supported by lockdep.
306 * This also means we have to number the sub-classes in the lowest bits of
307 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
308 * mask and we can't use bit-masking to build the subclasses. What a mess.
313 * 16-19 XFS_IOLOCK_SHIFT dependencies
314 * 20-23 XFS_MMAPLOCK_SHIFT dependencies
315 * 24-31 XFS_ILOCK_SHIFT dependencies
328 * 0-4 subclass values
329 * 5 PARENT subclass (not nestable)
330 * 6 RTBITMAP subclass (not nestable)
331 * 7 RTSUM subclass (not nestable)
334 #define XFS_IOLOCK_SHIFT 16
335 #define XFS_IOLOCK_MAX_SUBCLASS 3
336 #define XFS_IOLOCK_DEP_MASK 0x000f0000
338 #define XFS_MMAPLOCK_SHIFT 20
339 #define XFS_MMAPLOCK_NUMORDER 0
340 #define XFS_MMAPLOCK_MAX_SUBCLASS 3
341 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000
343 #define XFS_ILOCK_SHIFT 24
344 #define XFS_ILOCK_PARENT_VAL 5
345 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1)
346 #define XFS_ILOCK_RTBITMAP_VAL 6
347 #define XFS_ILOCK_RTSUM_VAL 7
348 #define XFS_ILOCK_DEP_MASK 0xff000000
349 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
350 #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
351 #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
353 #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \
354 XFS_MMAPLOCK_DEP_MASK | \
357 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \
359 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
360 >> XFS_MMAPLOCK_SHIFT)
361 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \
365 * Layouts are broken in the BREAK_WRITE case to ensure that
366 * layout-holders do not collide with local writes. Additionally,
367 * layouts are broken in the BREAK_UNMAP case to make sure the
368 * layout-holder has a consistent view of the file's extent map. While
369 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
370 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
373 enum layout_break_reason {
379 * For multiple groups support: if S_ISGID bit is set in the parent
380 * directory, group of new file is set to that of the parent, and
381 * new subdirectory gets S_ISGID bit from parent.
383 #define XFS_INHERIT_GID(pip) \
384 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
385 (VFS_I(pip)->i_mode & S_ISGID))
387 int xfs_release(struct xfs_inode *ip);
388 void xfs_inactive(struct xfs_inode *ip);
389 int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name,
390 struct xfs_inode **ipp, struct xfs_name *ci_name);
391 int xfs_create(struct user_namespace *mnt_userns,
392 struct xfs_inode *dp, struct xfs_name *name,
393 umode_t mode, dev_t rdev, bool need_xattr,
394 struct xfs_inode **ipp);
395 int xfs_create_tmpfile(struct user_namespace *mnt_userns,
396 struct xfs_inode *dp, umode_t mode,
397 struct xfs_inode **ipp);
398 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
399 struct xfs_inode *ip);
400 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
401 struct xfs_name *target_name);
402 int xfs_rename(struct user_namespace *mnt_userns,
403 struct xfs_inode *src_dp, struct xfs_name *src_name,
404 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
405 struct xfs_name *target_name,
406 struct xfs_inode *target_ip, unsigned int flags);
408 void xfs_ilock(xfs_inode_t *, uint);
409 int xfs_ilock_nowait(xfs_inode_t *, uint);
410 void xfs_iunlock(xfs_inode_t *, uint);
411 void xfs_ilock_demote(xfs_inode_t *, uint);
412 bool xfs_isilocked(struct xfs_inode *, uint);
413 uint xfs_ilock_data_map_shared(struct xfs_inode *);
414 uint xfs_ilock_attr_map_shared(struct xfs_inode *);
416 uint xfs_ip2xflags(struct xfs_inode *);
417 int xfs_ifree(struct xfs_trans *, struct xfs_inode *);
418 int xfs_itruncate_extents_flags(struct xfs_trans **,
419 struct xfs_inode *, int, xfs_fsize_t, int);
420 void xfs_iext_realloc(xfs_inode_t *, int, int);
422 int xfs_log_force_inode(struct xfs_inode *ip);
423 void xfs_iunpin_wait(xfs_inode_t *);
424 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
426 int xfs_iflush_cluster(struct xfs_buf *);
427 void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
428 struct xfs_inode *ip1, uint ip1_mode);
430 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
431 xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip);
433 int xfs_init_new_inode(struct user_namespace *mnt_userns, struct xfs_trans *tp,
434 struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
435 xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
436 struct xfs_inode **ipp);
439 xfs_itruncate_extents(
440 struct xfs_trans **tpp,
441 struct xfs_inode *ip,
443 xfs_fsize_t new_size)
445 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
448 /* from xfs_file.c */
449 enum xfs_prealloc_flags {
450 XFS_PREALLOC_SET = (1 << 1),
451 XFS_PREALLOC_CLEAR = (1 << 2),
452 XFS_PREALLOC_SYNC = (1 << 3),
453 XFS_PREALLOC_INVISIBLE = (1 << 4),
456 int xfs_update_prealloc_flags(struct xfs_inode *ip,
457 enum xfs_prealloc_flags flags);
458 int xfs_break_layouts(struct inode *inode, uint *iolock,
459 enum layout_break_reason reason);
461 /* from xfs_iops.c */
462 extern void xfs_setup_inode(struct xfs_inode *ip);
463 extern void xfs_setup_iops(struct xfs_inode *ip);
464 extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
467 * When setting up a newly allocated inode, we need to call
468 * xfs_finish_inode_setup() once the inode is fully instantiated at
469 * the VFS level to prevent the rest of the world seeing the inode
470 * before we've completed instantiation. Otherwise we can do it
471 * the moment the inode lookup is complete.
473 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
475 xfs_iflags_clear(ip, XFS_INEW);
477 unlock_new_inode(VFS_I(ip));
478 wake_up_bit(&ip->i_flags, __XFS_INEW_BIT);
481 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
485 xfs_finish_inode_setup(ip);
488 void xfs_irele(struct xfs_inode *ip);
490 extern struct kmem_zone *xfs_inode_zone;
492 /* The default CoW extent size hint. */
493 #define XFS_DEFAULT_COWEXTSZ_HINT 32
495 int xfs_iunlink_init(struct xfs_perag *pag);
496 void xfs_iunlink_destroy(struct xfs_perag *pag);
498 void xfs_end_io(struct work_struct *work);
500 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
501 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
503 #endif /* __XFS_INODE_H__ */