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15b1e36bdb
Add the disk, network and memory structures needed to support data in inode. Struct ocfs2_inline_data is defined and embedded in ocfs2_dinode for storing inline data. A new inode field, i_dyn_features, is added to facilitate tracking of dynamic inode state. Since it will be used often, we want to mirror it on ocfs2_inode_info, and transfer it via the meta data lvb. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Reviewed-by: Joel Becker <joel.becker@oracle.com>
825 lines
24 KiB
C
825 lines
24 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* ocfs2_fs.h
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*
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* On-disk structures for OCFS2.
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License, version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef _OCFS2_FS_H
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#define _OCFS2_FS_H
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/* Version */
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#define OCFS2_MAJOR_REV_LEVEL 0
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#define OCFS2_MINOR_REV_LEVEL 90
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/*
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* An OCFS2 volume starts this way:
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* Sector 0: Valid ocfs1_vol_disk_hdr that cleanly fails to mount OCFS.
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* Sector 1: Valid ocfs1_vol_label that cleanly fails to mount OCFS.
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* Block OCFS2_SUPER_BLOCK_BLKNO: OCFS2 superblock.
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*
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* All other structures are found from the superblock information.
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*
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* OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a
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* blocksize of 2K, it is 4096 bytes into disk.
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*/
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#define OCFS2_SUPER_BLOCK_BLKNO 2
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/*
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* Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could
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* grow if needed.
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*/
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#define OCFS2_MIN_CLUSTERSIZE 4096
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#define OCFS2_MAX_CLUSTERSIZE 1048576
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/*
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* Blocks cannot be bigger than clusters, so the maximum blocksize is the
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* minimum cluster size.
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*/
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#define OCFS2_MIN_BLOCKSIZE 512
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#define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE
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/* Filesystem magic number */
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#define OCFS2_SUPER_MAGIC 0x7461636f
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/* Object signatures */
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#define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
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#define OCFS2_INODE_SIGNATURE "INODE01"
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#define OCFS2_EXTENT_BLOCK_SIGNATURE "EXBLK01"
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#define OCFS2_GROUP_DESC_SIGNATURE "GROUP01"
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/* Compatibility flags */
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#define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \
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( OCFS2_SB(sb)->s_feature_compat & (mask) )
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#define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \
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( OCFS2_SB(sb)->s_feature_ro_compat & (mask) )
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#define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \
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( OCFS2_SB(sb)->s_feature_incompat & (mask) )
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#define OCFS2_SET_COMPAT_FEATURE(sb,mask) \
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OCFS2_SB(sb)->s_feature_compat |= (mask)
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#define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \
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OCFS2_SB(sb)->s_feature_ro_compat |= (mask)
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#define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \
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OCFS2_SB(sb)->s_feature_incompat |= (mask)
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#define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \
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OCFS2_SB(sb)->s_feature_compat &= ~(mask)
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#define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
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OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask)
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#define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
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OCFS2_SB(sb)->s_feature_incompat &= ~(mask)
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#define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB
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#define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \
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| OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \
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| OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
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#define OCFS2_FEATURE_RO_COMPAT_SUPP OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
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/*
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* Heartbeat-only devices are missing journals and other files. The
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* filesystem driver can't load them, but the library can. Never put
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* this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*.
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*/
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#define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002
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/*
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* tunefs sets this incompat flag before starting the resize and clears it
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* at the end. This flag protects users from inadvertently mounting the fs
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* after an aborted run without fsck-ing.
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*/
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#define OCFS2_FEATURE_INCOMPAT_RESIZE_INPROG 0x0004
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/* Used to denote a non-clustered volume */
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#define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008
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/* Support for sparse allocation in b-trees */
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#define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010
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/*
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* Tunefs sets this incompat flag before starting an operation which
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* would require cleanup on abort. This is done to protect users from
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* inadvertently mounting the fs after an aborted run without
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* fsck-ing.
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*
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* s_tunefs_flags on the super block describes precisely which
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* operations were in progress.
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*/
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#define OCFS2_FEATURE_INCOMPAT_TUNEFS_INPROG 0x0020
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/* Support for data packed into inode blocks */
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#define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040
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/*
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* backup superblock flag is used to indicate that this volume
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* has backup superblocks.
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*/
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#define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001
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/*
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* Unwritten extents support.
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*/
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#define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001
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/* The byte offset of the first backup block will be 1G.
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* The following will be 4G, 16G, 64G, 256G and 1T.
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*/
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#define OCFS2_BACKUP_SB_START 1 << 30
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/* the max backup superblock nums */
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#define OCFS2_MAX_BACKUP_SUPERBLOCKS 6
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/*
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* Flags on ocfs2_super_block.s_tunefs_flags
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*/
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#define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001 /* Removing slots */
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/*
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* Flags on ocfs2_dinode.i_flags
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*/
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#define OCFS2_VALID_FL (0x00000001) /* Inode is valid */
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#define OCFS2_UNUSED2_FL (0x00000002)
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#define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */
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#define OCFS2_UNUSED3_FL (0x00000008)
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/* System inode flags */
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#define OCFS2_SYSTEM_FL (0x00000010) /* System inode */
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#define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */
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#define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */
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#define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */
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#define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */
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#define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */
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#define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */
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#define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */
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/*
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* Flags on ocfs2_dinode.i_dyn_features
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*
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* These can change much more often than i_flags. When adding flags,
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* keep in mind that i_dyn_features is only 16 bits wide.
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*/
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#define OCFS2_INLINE_DATA_FL (0x0001) /* Data stored in inode block */
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#define OCFS2_HAS_XATTR_FL (0x0002)
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#define OCFS2_INLINE_XATTR_FL (0x0004)
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#define OCFS2_INDEXED_DIR_FL (0x0008)
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/* Inode attributes, keep in sync with EXT2 */
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#define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */
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#define OCFS2_UNRM_FL (0x00000002) /* Undelete */
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#define OCFS2_COMPR_FL (0x00000004) /* Compress file */
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#define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */
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#define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */
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#define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */
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#define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */
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#define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */
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#define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */
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#define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */
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#define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */
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/*
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* Extent record flags (e_node.leaf.flags)
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*/
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#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but
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* unwritten */
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/*
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* ioctl commands
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*/
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#define OCFS2_IOC_GETFLAGS _IOR('f', 1, long)
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#define OCFS2_IOC_SETFLAGS _IOW('f', 2, long)
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#define OCFS2_IOC32_GETFLAGS _IOR('f', 1, int)
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#define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int)
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/*
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* Space reservation / allocation / free ioctls and argument structure
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* are designed to be compatible with XFS.
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*
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* ALLOCSP* and FREESP* are not and will never be supported, but are
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* included here for completeness.
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*/
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struct ocfs2_space_resv {
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__s16 l_type;
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__s16 l_whence;
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__s64 l_start;
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__s64 l_len; /* len == 0 means until end of file */
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__s32 l_sysid;
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__u32 l_pid;
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__s32 l_pad[4]; /* reserve area */
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};
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#define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
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#define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
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#define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
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#define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
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#define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
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#define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
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#define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
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#define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
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/*
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* Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
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*/
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#define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */
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/*
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* superblock s_state flags
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*/
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#define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */
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/* Limit of space in ocfs2_dir_entry */
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#define OCFS2_MAX_FILENAME_LEN 255
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/* Maximum slots on an ocfs2 file system */
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#define OCFS2_MAX_SLOTS 255
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/* Slot map indicator for an empty slot */
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#define OCFS2_INVALID_SLOT -1
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#define OCFS2_VOL_UUID_LEN 16
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#define OCFS2_MAX_VOL_LABEL_LEN 64
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/* Journal limits (in bytes) */
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#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
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struct ocfs2_system_inode_info {
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char *si_name;
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int si_iflags;
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int si_mode;
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};
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/* System file index */
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enum {
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BAD_BLOCK_SYSTEM_INODE = 0,
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GLOBAL_INODE_ALLOC_SYSTEM_INODE,
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SLOT_MAP_SYSTEM_INODE,
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#define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE
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HEARTBEAT_SYSTEM_INODE,
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GLOBAL_BITMAP_SYSTEM_INODE,
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#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_SYSTEM_INODE
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ORPHAN_DIR_SYSTEM_INODE,
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EXTENT_ALLOC_SYSTEM_INODE,
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INODE_ALLOC_SYSTEM_INODE,
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JOURNAL_SYSTEM_INODE,
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LOCAL_ALLOC_SYSTEM_INODE,
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TRUNCATE_LOG_SYSTEM_INODE,
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NUM_SYSTEM_INODES
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};
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static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
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/* Global system inodes (single copy) */
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/* The first two are only used from userspace mfks/tunefs */
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[BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 },
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[GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
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/* These are used by the running filesystem */
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[SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 },
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[HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 },
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[GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 },
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/* Slot-specific system inodes (one copy per slot) */
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[ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 },
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[EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
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[INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
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[JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 },
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[LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 },
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[TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 }
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};
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/* Parameter passed from mount.ocfs2 to module */
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#define OCFS2_HB_NONE "heartbeat=none"
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#define OCFS2_HB_LOCAL "heartbeat=local"
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/*
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* OCFS2 directory file types. Only the low 3 bits are used. The
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* other bits are reserved for now.
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*/
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#define OCFS2_FT_UNKNOWN 0
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#define OCFS2_FT_REG_FILE 1
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#define OCFS2_FT_DIR 2
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#define OCFS2_FT_CHRDEV 3
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#define OCFS2_FT_BLKDEV 4
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#define OCFS2_FT_FIFO 5
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#define OCFS2_FT_SOCK 6
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#define OCFS2_FT_SYMLINK 7
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#define OCFS2_FT_MAX 8
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/*
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* OCFS2_DIR_PAD defines the directory entries boundaries
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*
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* NOTE: It must be a multiple of 4
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*/
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#define OCFS2_DIR_PAD 4
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#define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1)
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#define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name)
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#define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \
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OCFS2_DIR_ROUND) & \
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~OCFS2_DIR_ROUND)
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#define OCFS2_LINK_MAX 32000
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#define S_SHIFT 12
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static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
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[S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE,
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[S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR,
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[S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV,
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[S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV,
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[S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO,
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[S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK,
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[S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK,
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};
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/*
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* Convenience casts
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*/
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#define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super))
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/*
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* On disk extent record for OCFS2
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* It describes a range of clusters on disk.
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*
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* Length fields are divided into interior and leaf node versions.
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* This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes.
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*/
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struct ocfs2_extent_rec {
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/*00*/ __le32 e_cpos; /* Offset into the file, in clusters */
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union {
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__le32 e_int_clusters; /* Clusters covered by all children */
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struct {
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__le16 e_leaf_clusters; /* Clusters covered by this
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extent */
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__u8 e_reserved1;
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__u8 e_flags; /* Extent flags */
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};
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};
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__le64 e_blkno; /* Physical disk offset, in blocks */
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/*10*/
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};
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struct ocfs2_chain_rec {
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__le32 c_free; /* Number of free bits in this chain. */
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__le32 c_total; /* Number of total bits in this chain */
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__le64 c_blkno; /* Physical disk offset (blocks) of 1st group */
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};
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struct ocfs2_truncate_rec {
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__le32 t_start; /* 1st cluster in this log */
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__le32 t_clusters; /* Number of total clusters covered */
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};
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/*
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* On disk extent list for OCFS2 (node in the tree). Note that this
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* is contained inside ocfs2_dinode or ocfs2_extent_block, so the
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* offsets are relative to ocfs2_dinode.id2.i_list or
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* ocfs2_extent_block.h_list, respectively.
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*/
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struct ocfs2_extent_list {
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/*00*/ __le16 l_tree_depth; /* Extent tree depth from this
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point. 0 means data extents
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hang directly off this
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header (a leaf)
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NOTE: The high 8 bits cannot be
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used - tree_depth is never that big.
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*/
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__le16 l_count; /* Number of extent records */
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__le16 l_next_free_rec; /* Next unused extent slot */
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__le16 l_reserved1;
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__le64 l_reserved2; /* Pad to
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sizeof(ocfs2_extent_rec) */
|
|
/*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */
|
|
};
|
|
|
|
/*
|
|
* On disk allocation chain list for OCFS2. Note that this is
|
|
* contained inside ocfs2_dinode, so the offsets are relative to
|
|
* ocfs2_dinode.id2.i_chain.
|
|
*/
|
|
struct ocfs2_chain_list {
|
|
/*00*/ __le16 cl_cpg; /* Clusters per Block Group */
|
|
__le16 cl_bpc; /* Bits per cluster */
|
|
__le16 cl_count; /* Total chains in this list */
|
|
__le16 cl_next_free_rec; /* Next unused chain slot */
|
|
__le64 cl_reserved1;
|
|
/*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */
|
|
};
|
|
|
|
/*
|
|
* On disk deallocation log for OCFS2. Note that this is
|
|
* contained inside ocfs2_dinode, so the offsets are relative to
|
|
* ocfs2_dinode.id2.i_dealloc.
|
|
*/
|
|
struct ocfs2_truncate_log {
|
|
/*00*/ __le16 tl_count; /* Total records in this log */
|
|
__le16 tl_used; /* Number of records in use */
|
|
__le32 tl_reserved1;
|
|
/*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */
|
|
};
|
|
|
|
/*
|
|
* On disk extent block (indirect block) for OCFS2
|
|
*/
|
|
struct ocfs2_extent_block
|
|
{
|
|
/*00*/ __u8 h_signature[8]; /* Signature for verification */
|
|
__le64 h_reserved1;
|
|
/*10*/ __le16 h_suballoc_slot; /* Slot suballocator this
|
|
extent_header belongs to */
|
|
__le16 h_suballoc_bit; /* Bit offset in suballocator
|
|
block group */
|
|
__le32 h_fs_generation; /* Must match super block */
|
|
__le64 h_blkno; /* Offset on disk, in blocks */
|
|
/*20*/ __le64 h_reserved3;
|
|
__le64 h_next_leaf_blk; /* Offset on disk, in blocks,
|
|
of next leaf header pointing
|
|
to data */
|
|
/*30*/ struct ocfs2_extent_list h_list; /* Extent record list */
|
|
/* Actual on-disk size is one block */
|
|
};
|
|
|
|
/*
|
|
* On disk superblock for OCFS2
|
|
* Note that it is contained inside an ocfs2_dinode, so all offsets
|
|
* are relative to the start of ocfs2_dinode.id2.
|
|
*/
|
|
struct ocfs2_super_block {
|
|
/*00*/ __le16 s_major_rev_level;
|
|
__le16 s_minor_rev_level;
|
|
__le16 s_mnt_count;
|
|
__le16 s_max_mnt_count;
|
|
__le16 s_state; /* File system state */
|
|
__le16 s_errors; /* Behaviour when detecting errors */
|
|
__le32 s_checkinterval; /* Max time between checks */
|
|
/*10*/ __le64 s_lastcheck; /* Time of last check */
|
|
__le32 s_creator_os; /* OS */
|
|
__le32 s_feature_compat; /* Compatible feature set */
|
|
/*20*/ __le32 s_feature_incompat; /* Incompatible feature set */
|
|
__le32 s_feature_ro_compat; /* Readonly-compatible feature set */
|
|
__le64 s_root_blkno; /* Offset, in blocks, of root directory
|
|
dinode */
|
|
/*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system
|
|
directory dinode */
|
|
__le32 s_blocksize_bits; /* Blocksize for this fs */
|
|
__le32 s_clustersize_bits; /* Clustersize for this fs */
|
|
/*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
|
|
before tunefs required */
|
|
__le16 s_tunefs_flag;
|
|
__le32 s_reserved1;
|
|
__le64 s_first_cluster_group; /* Block offset of 1st cluster
|
|
* group header */
|
|
/*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
|
|
/*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
|
|
/*A0*/
|
|
};
|
|
|
|
/*
|
|
* Local allocation bitmap for OCFS2 slots
|
|
* Note that it exists inside an ocfs2_dinode, so all offsets are
|
|
* relative to the start of ocfs2_dinode.id2.
|
|
*/
|
|
struct ocfs2_local_alloc
|
|
{
|
|
/*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */
|
|
__le16 la_size; /* Size of included bitmap, in bytes */
|
|
__le16 la_reserved1;
|
|
__le64 la_reserved2;
|
|
/*10*/ __u8 la_bitmap[0];
|
|
};
|
|
|
|
/*
|
|
* Data-in-inode header. This is only used if i_dyn_features has
|
|
* OCFS2_INLINE_DATA_FL set.
|
|
*/
|
|
struct ocfs2_inline_data
|
|
{
|
|
/*00*/ __le16 id_count; /* Number of bytes that can be used
|
|
* for data, starting at id_data */
|
|
__le16 id_reserved0;
|
|
__le32 id_reserved1;
|
|
__u8 id_data[0]; /* Start of user data */
|
|
};
|
|
|
|
/*
|
|
* On disk inode for OCFS2
|
|
*/
|
|
struct ocfs2_dinode {
|
|
/*00*/ __u8 i_signature[8]; /* Signature for validation */
|
|
__le32 i_generation; /* Generation number */
|
|
__le16 i_suballoc_slot; /* Slot suballocator this inode
|
|
belongs to */
|
|
__le16 i_suballoc_bit; /* Bit offset in suballocator
|
|
block group */
|
|
/*10*/ __le32 i_reserved0;
|
|
__le32 i_clusters; /* Cluster count */
|
|
__le32 i_uid; /* Owner UID */
|
|
__le32 i_gid; /* Owning GID */
|
|
/*20*/ __le64 i_size; /* Size in bytes */
|
|
__le16 i_mode; /* File mode */
|
|
__le16 i_links_count; /* Links count */
|
|
__le32 i_flags; /* File flags */
|
|
/*30*/ __le64 i_atime; /* Access time */
|
|
__le64 i_ctime; /* Creation time */
|
|
/*40*/ __le64 i_mtime; /* Modification time */
|
|
__le64 i_dtime; /* Deletion time */
|
|
/*50*/ __le64 i_blkno; /* Offset on disk, in blocks */
|
|
__le64 i_last_eb_blk; /* Pointer to last extent
|
|
block */
|
|
/*60*/ __le32 i_fs_generation; /* Generation per fs-instance */
|
|
__le32 i_atime_nsec;
|
|
__le32 i_ctime_nsec;
|
|
__le32 i_mtime_nsec;
|
|
__le32 i_attr;
|
|
__le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL
|
|
was set in i_flags */
|
|
__le16 i_dyn_features;
|
|
/*70*/ __le64 i_reserved2[8];
|
|
/*B8*/ union {
|
|
__le64 i_pad1; /* Generic way to refer to this
|
|
64bit union */
|
|
struct {
|
|
__le64 i_rdev; /* Device number */
|
|
} dev1;
|
|
struct { /* Info for bitmap system
|
|
inodes */
|
|
__le32 i_used; /* Bits (ie, clusters) used */
|
|
__le32 i_total; /* Total bits (clusters)
|
|
available */
|
|
} bitmap1;
|
|
struct { /* Info for journal system
|
|
inodes */
|
|
__le32 ij_flags; /* Mounted, version, etc. */
|
|
__le32 ij_pad;
|
|
} journal1;
|
|
} id1; /* Inode type dependant 1 */
|
|
/*C0*/ union {
|
|
struct ocfs2_super_block i_super;
|
|
struct ocfs2_local_alloc i_lab;
|
|
struct ocfs2_chain_list i_chain;
|
|
struct ocfs2_extent_list i_list;
|
|
struct ocfs2_truncate_log i_dealloc;
|
|
struct ocfs2_inline_data i_data;
|
|
__u8 i_symlink[0];
|
|
} id2;
|
|
/* Actual on-disk size is one block */
|
|
};
|
|
|
|
/*
|
|
* On-disk directory entry structure for OCFS2
|
|
*
|
|
* Packed as this structure could be accessed unaligned on 64-bit platforms
|
|
*/
|
|
struct ocfs2_dir_entry {
|
|
/*00*/ __le64 inode; /* Inode number */
|
|
__le16 rec_len; /* Directory entry length */
|
|
__u8 name_len; /* Name length */
|
|
__u8 file_type;
|
|
/*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */
|
|
/* Actual on-disk length specified by rec_len */
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* On disk allocator group structure for OCFS2
|
|
*/
|
|
struct ocfs2_group_desc
|
|
{
|
|
/*00*/ __u8 bg_signature[8]; /* Signature for validation */
|
|
__le16 bg_size; /* Size of included bitmap in
|
|
bytes. */
|
|
__le16 bg_bits; /* Bits represented by this
|
|
group. */
|
|
__le16 bg_free_bits_count; /* Free bits count */
|
|
__le16 bg_chain; /* What chain I am in. */
|
|
/*10*/ __le32 bg_generation;
|
|
__le32 bg_reserved1;
|
|
__le64 bg_next_group; /* Next group in my list, in
|
|
blocks */
|
|
/*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in
|
|
blocks */
|
|
__le64 bg_blkno; /* Offset on disk, in blocks */
|
|
/*30*/ __le64 bg_reserved2[2];
|
|
/*40*/ __u8 bg_bitmap[0];
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
static inline int ocfs2_fast_symlink_chars(struct super_block *sb)
|
|
{
|
|
return sb->s_blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_symlink);
|
|
}
|
|
|
|
static inline int ocfs2_max_inline_data(struct super_block *sb)
|
|
{
|
|
return sb->s_blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_data.id_data);
|
|
}
|
|
|
|
static inline int ocfs2_extent_recs_per_inode(struct super_block *sb)
|
|
{
|
|
int size;
|
|
|
|
size = sb->s_blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
|
|
|
|
return size / sizeof(struct ocfs2_extent_rec);
|
|
}
|
|
|
|
static inline int ocfs2_chain_recs_per_inode(struct super_block *sb)
|
|
{
|
|
int size;
|
|
|
|
size = sb->s_blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
|
|
|
|
return size / sizeof(struct ocfs2_chain_rec);
|
|
}
|
|
|
|
static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb)
|
|
{
|
|
int size;
|
|
|
|
size = sb->s_blocksize -
|
|
offsetof(struct ocfs2_extent_block, h_list.l_recs);
|
|
|
|
return size / sizeof(struct ocfs2_extent_rec);
|
|
}
|
|
|
|
static inline u16 ocfs2_local_alloc_size(struct super_block *sb)
|
|
{
|
|
u16 size;
|
|
|
|
size = sb->s_blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
|
|
|
|
return size;
|
|
}
|
|
|
|
static inline int ocfs2_group_bitmap_size(struct super_block *sb)
|
|
{
|
|
int size;
|
|
|
|
size = sb->s_blocksize -
|
|
offsetof(struct ocfs2_group_desc, bg_bitmap);
|
|
|
|
return size;
|
|
}
|
|
|
|
static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb)
|
|
{
|
|
int size;
|
|
|
|
size = sb->s_blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
|
|
|
|
return size / sizeof(struct ocfs2_truncate_rec);
|
|
}
|
|
|
|
static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index)
|
|
{
|
|
u64 offset = OCFS2_BACKUP_SB_START;
|
|
|
|
if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
|
|
offset <<= (2 * index);
|
|
offset >>= sb->s_blocksize_bits;
|
|
return offset;
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
#else
|
|
static inline int ocfs2_fast_symlink_chars(int blocksize)
|
|
{
|
|
return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink);
|
|
}
|
|
|
|
static inline int ocfs2_max_inline_data(int blocksize)
|
|
{
|
|
return blocksize - offsetof(struct ocfs2_dinode, id2.i_data.id_data);
|
|
}
|
|
|
|
static inline int ocfs2_extent_recs_per_inode(int blocksize)
|
|
{
|
|
int size;
|
|
|
|
size = blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
|
|
|
|
return size / sizeof(struct ocfs2_extent_rec);
|
|
}
|
|
|
|
static inline int ocfs2_chain_recs_per_inode(int blocksize)
|
|
{
|
|
int size;
|
|
|
|
size = blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
|
|
|
|
return size / sizeof(struct ocfs2_chain_rec);
|
|
}
|
|
|
|
static inline int ocfs2_extent_recs_per_eb(int blocksize)
|
|
{
|
|
int size;
|
|
|
|
size = blocksize -
|
|
offsetof(struct ocfs2_extent_block, h_list.l_recs);
|
|
|
|
return size / sizeof(struct ocfs2_extent_rec);
|
|
}
|
|
|
|
static inline int ocfs2_local_alloc_size(int blocksize)
|
|
{
|
|
int size;
|
|
|
|
size = blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
|
|
|
|
return size;
|
|
}
|
|
|
|
static inline int ocfs2_group_bitmap_size(int blocksize)
|
|
{
|
|
int size;
|
|
|
|
size = blocksize -
|
|
offsetof(struct ocfs2_group_desc, bg_bitmap);
|
|
|
|
return size;
|
|
}
|
|
|
|
static inline int ocfs2_truncate_recs_per_inode(int blocksize)
|
|
{
|
|
int size;
|
|
|
|
size = blocksize -
|
|
offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
|
|
|
|
return size / sizeof(struct ocfs2_truncate_rec);
|
|
}
|
|
|
|
static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index)
|
|
{
|
|
uint64_t offset = OCFS2_BACKUP_SB_START;
|
|
|
|
if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
|
|
offset <<= (2 * index);
|
|
offset /= blocksize;
|
|
return offset;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* __KERNEL__ */
|
|
|
|
|
|
static inline int ocfs2_system_inode_is_global(int type)
|
|
{
|
|
return ((type >= 0) &&
|
|
(type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE));
|
|
}
|
|
|
|
static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
|
|
int type, int slot)
|
|
{
|
|
int chars;
|
|
|
|
/*
|
|
* Global system inodes can only have one copy. Everything
|
|
* after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode
|
|
* list has a copy per slot.
|
|
*/
|
|
if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
|
|
chars = snprintf(buf, len,
|
|
ocfs2_system_inodes[type].si_name);
|
|
else
|
|
chars = snprintf(buf, len,
|
|
ocfs2_system_inodes[type].si_name,
|
|
slot);
|
|
|
|
return chars;
|
|
}
|
|
|
|
static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
|
|
umode_t mode)
|
|
{
|
|
de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
|
|
}
|
|
|
|
#endif /* _OCFS2_FS_H */
|
|
|