fs/xfs/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         uint16_t        di_flushiter;   /* incremented on flush */
  20         prid_t          di_projid;      /* owner's project id */
  21         xfs_fsize_t     di_size;        /* number of bytes in file */
  22         xfs_rfsblock_t  di_nblocks;     /* # of direct & btree blocks used */
  23         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
  24         uint8_t         di_forkoff;     /* attr fork offs, <<3 for 64b align */
  25         uint32_t        di_dmevmask;    /* DMIG event mask */
  26         uint16_t        di_dmstate;     /* DMIG state info */
  27         uint16_t        di_flags;       /* random flags, XFS_DIFLAG_... */
  28
  29         uint64_t        di_flags2;      /* more random flags */
  30         uint32_t        di_cowextsize;  /* basic cow extent size for file */
  31
  32         struct timespec64 di_crtime;    /* time created */
  33 };
  34
  35 static inline bool xfs_icdinode_has_bigtime(const struct xfs_icdinode *icd)
  36 {
  37         return icd->di_flags2 & XFS_DIFLAG2_BIGTIME;
  38 }
  39
  40 /*
  41  * Inode location information.  Stored in the inode and passed to
  42  * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
  43  */
  44 struct xfs_imap {
  45         xfs_daddr_t     im_blkno;       /* starting BB of inode chunk */
  46         unsigned short  im_len;         /* length in BBs of inode chunk */
  47         unsigned short  im_boffset;     /* inode offset in block in bytes */
  48 };
  49
  50 int     xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
  51                        struct xfs_imap *, struct xfs_dinode **,
  52                        struct xfs_buf **, uint);
  53 void    xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
  54 void    xfs_inode_to_disk(struct xfs_inode *ip, struct xfs_dinode *to,
  55                           xfs_lsn_t lsn);
  56 int     xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from);
  57
  58 xfs_failaddr_t xfs_dinode_verify(struct xfs_mount *mp, xfs_ino_t ino,
  59                            struct xfs_dinode *dip);
  60 xfs_failaddr_t xfs_inode_validate_extsize(struct xfs_mount *mp,
  61                 uint32_t extsize, uint16_t mode, uint16_t flags);
  62 xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp,
  63                 uint32_t cowextsize, uint16_t mode, uint16_t flags,
  64                 uint64_t flags2);
  65
  66 static inline uint64_t xfs_inode_encode_bigtime(struct timespec64 tv)
  67 {
  68         return xfs_unix_to_bigtime(tv.tv_sec) * NSEC_PER_SEC + tv.tv_nsec;
  69 }
  70
  71 struct timespec64 xfs_inode_from_disk_ts(struct xfs_dinode *dip,
  72                 const xfs_timestamp_t ts);
  73
  74 #endif  /* __XFS_INODE_BUF_H__ */