1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
4  * All Rights Reserved.
5  */
6 #ifndef	__XFS_INODE_BUF_H__
7 #define	__XFS_INODE_BUF_H__
8 
9 struct xfs_inode;
10 struct xfs_dinode;
11 
12 /*
13  * In memory representation of the XFS inode. This is held in the in-core struct
14  * xfs_inode and represents the current on disk values but the structure is not
15  * in on-disk format.  That is, this structure is always translated to on-disk
16  * format specific structures at the appropriate time.
17  */
18 struct xfs_icdinode {
19 	int8_t		di_version;	/* inode version */
20 	int8_t		di_format;	/* format of di_c data */
21 	uint16_t	di_flushiter;	/* incremented on flush */
22 	uint32_t	di_uid;		/* owner's user id */
23 	uint32_t	di_gid;		/* owner's group id */
24 	uint16_t	di_projid_lo;	/* lower part of owner's project id */
25 	uint16_t	di_projid_hi;	/* higher part of owner's project id */
26 	xfs_fsize_t	di_size;	/* number of bytes in file */
27 	xfs_rfsblock_t	di_nblocks;	/* # of direct & btree blocks used */
28 	xfs_extlen_t	di_extsize;	/* basic/minimum extent size for file */
29 	xfs_extnum_t	di_nextents;	/* number of extents in data fork */
30 	xfs_aextnum_t	di_anextents;	/* number of extents in attribute fork*/
31 	uint8_t		di_forkoff;	/* attr fork offs, <<3 for 64b align */
32 	int8_t		di_aformat;	/* format of attr fork's data */
33 	uint32_t	di_dmevmask;	/* DMIG event mask */
34 	uint16_t	di_dmstate;	/* DMIG state info */
35 	uint16_t	di_flags;	/* random flags, XFS_DIFLAG_... */
36 
37 	uint64_t	di_flags2;	/* more random flags */
38 	uint32_t	di_cowextsize;	/* basic cow extent size for file */
39 
40 	xfs_ictimestamp_t di_crtime;	/* time created */
41 };
42 
43 /*
44  * Inode location information.  Stored in the inode and passed to
45  * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
46  */
47 struct xfs_imap {
48 	xfs_daddr_t	im_blkno;	/* starting BB of inode chunk */
49 	unsigned short	im_len;		/* length in BBs of inode chunk */
50 	unsigned short	im_boffset;	/* inode offset in block in bytes */
51 };
52 
53 int	xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
54 		       struct xfs_imap *, struct xfs_dinode **,
55 		       struct xfs_buf **, uint, uint);
56 int	xfs_iread(struct xfs_mount *, struct xfs_trans *,
57 		  struct xfs_inode *, uint);
58 void	xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
59 void	xfs_inode_to_disk(struct xfs_inode *ip, struct xfs_dinode *to,
60 			  xfs_lsn_t lsn);
61 void	xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from);
62 void	xfs_log_dinode_to_disk(struct xfs_log_dinode *from,
63 			       struct xfs_dinode *to);
64 
65 bool	xfs_dinode_good_version(struct xfs_mount *mp, __u8 version);
66 
67 #if defined(DEBUG)
68 void	xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
69 #else
70 #define	xfs_inobp_check(mp, bp)
71 #endif /* DEBUG */
72 
73 xfs_failaddr_t xfs_dinode_verify(struct xfs_mount *mp, xfs_ino_t ino,
74 			   struct xfs_dinode *dip);
75 xfs_failaddr_t xfs_inode_validate_extsize(struct xfs_mount *mp,
76 		uint32_t extsize, uint16_t mode, uint16_t flags);
77 xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp,
78 		uint32_t cowextsize, uint16_t mode, uint16_t flags,
79 		uint64_t flags2);
80 
81 #endif	/* __XFS_INODE_BUF_H__ */
82