libxfs/xfs_inode_buf.h

   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__ */