fs/xfs/libxfs/xfs_inode_buf.h

   1 /*
   2  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   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.
   8  *
   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.
  13  *
  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
  17  */
  18 #ifndef __XFS_INODE_BUF_H__
  19 #define __XFS_INODE_BUF_H__
  20
  21 struct xfs_inode;
  22 struct xfs_dinode;
  23
  24 /*
  25  * In memory representation of the XFS inode. This is held in the in-core struct
  26  * xfs_inode and represents the current on disk values but the structure is not
  27  * in on-disk format.  That is, this structure is always translated to on-disk
  28  * format specific structures at the appropriate time.
  29  */
  30 struct xfs_icdinode {
  31         int8_t          di_version;     /* inode version */
  32         int8_t          di_format;      /* format of di_c data */
  33         uint16_t        di_flushiter;   /* incremented on flush */
  34         uint32_t        di_uid;         /* owner's user id */
  35         uint32_t        di_gid;         /* owner's group id */
  36         uint16_t        di_projid_lo;   /* lower part of owner's project id */
  37         uint16_t        di_projid_hi;   /* higher part of owner's project id */
  38         xfs_fsize_t     di_size;        /* number of bytes in file */
  39         xfs_rfsblock_t  di_nblocks;     /* # of direct & btree blocks used */
  40         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
  41         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
  42         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
  43         uint8_t         di_forkoff;     /* attr fork offs, <<3 for 64b align */
  44         int8_t          di_aformat;     /* format of attr fork's data */
  45         uint32_t        di_dmevmask;    /* DMIG event mask */
  46         uint16_t        di_dmstate;     /* DMIG state info */
  47         uint16_t        di_flags;       /* random flags, XFS_DIFLAG_... */
  48
  49         uint64_t        di_flags2;      /* more random flags */
  50         uint32_t        di_cowextsize;  /* basic cow extent size for file */
  51
  52         xfs_ictimestamp_t di_crtime;    /* time created */
  53 };
  54
  55 /*
  56  * Inode location information.  Stored in the inode and passed to
  57  * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
  58  */
  59 struct xfs_imap {
  60         xfs_daddr_t     im_blkno;       /* starting BB of inode chunk */
  61         unsigned short  im_len;         /* length in BBs of inode chunk */
  62         unsigned short  im_boffset;     /* inode offset in block in bytes */
  63 };
  64
  65 int     xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
  66                        struct xfs_imap *, struct xfs_dinode **,
  67                        struct xfs_buf **, uint, uint);
  68 int     xfs_iread(struct xfs_mount *, struct xfs_trans *,
  69                   struct xfs_inode *, uint);
  70 void    xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
  71 void    xfs_inode_to_disk(struct xfs_inode *ip, struct xfs_dinode *to,
  72                           xfs_lsn_t lsn);
  73 void    xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from);
  74 void    xfs_log_dinode_to_disk(struct xfs_log_dinode *from,
  75                                struct xfs_dinode *to);
  76
  77 bool    xfs_dinode_good_version(struct xfs_mount *mp, __u8 version);
  78
  79 #if defined(DEBUG)
  80 void    xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
  81 #else
  82 #define xfs_inobp_check(mp, bp)
  83 #endif /* DEBUG */
  84
  85 bool    xfs_dinode_verify(struct xfs_mount *mp, xfs_ino_t ino,
  86                           struct xfs_dinode *dip);
  87
  88 #endif  /* __XFS_INODE_BUF_H__ */