include/zfs/zfs_znode.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 /*
   8  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   9  * Use is subject to license terms.
  10  */
  11
  12 #ifndef _SYS_FS_ZFS_ZNODE_H
  13 #define _SYS_FS_ZFS_ZNODE_H
  14
  15 #include <zfs/zfs_acl.h>
  16
  17 #define MASTER_NODE_OBJ 1
  18 #define ZFS_ROOT_OBJ            "ROOT"
  19 #define ZPL_VERSION_STR         "VERSION"
  20 #define ZFS_SA_ATTRS            "SA_ATTRS"
  21
  22 #define ZPL_VERSION             5ULL
  23
  24 #define ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48)
  25
  26 /*
  27  * This is the persistent portion of the znode.  It is stored
  28  * in the "bonus buffer" of the file.  Short symbolic links
  29  * are also stored in the bonus buffer.
  30  */
  31 typedef struct znode_phys {
  32         uint64_t zp_atime[2];      /*  0 - last file access time */
  33         uint64_t zp_mtime[2];   /* 16 - last file modification time */
  34         uint64_t zp_ctime[2];   /* 32 - last file change time */
  35         uint64_t zp_crtime[2];  /* 48 - creation time */
  36         uint64_t zp_gen;                /* 64 - generation (txg of creation) */
  37         uint64_t zp_mode;               /* 72 - file mode bits */
  38         uint64_t zp_size;               /* 80 - size of file */
  39         uint64_t zp_parent;     /* 88 - directory parent (`..') */
  40         uint64_t zp_links;              /* 96 - number of links to file */
  41         uint64_t zp_xattr;              /* 104 - DMU object for xattrs */
  42         uint64_t zp_rdev;               /* 112 - dev_t for VBLK & VCHR files */
  43         uint64_t zp_flags;              /* 120 - persistent flags */
  44         uint64_t zp_uid;                /* 128 - file owner */
  45         uint64_t zp_gid;                /* 136 - owning group */
  46         uint64_t zp_pad[4];     /* 144 - future */
  47         zfs_znode_acl_t zp_acl;         /* 176 - 263 ACL */
  48         /*
  49          * Data may pad out any remaining bytes in the znode buffer, eg:
  50          *
  51          * |<---------------------- dnode_phys (512) ------------------------>|
  52          * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
  53          *                      |<---- znode (264) ---->|<---- data (56) ---->|
  54          *
  55          * At present, we only use this space to store symbolic links.
  56          */
  57 } znode_phys_t;
  58
  59 #endif  /* _SYS_FS_ZFS_ZNODE_H */