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1609 lines
50 KiB
1609 lines
50 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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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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#ifndef _OCFS2_FS_H |
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#define _OCFS2_FS_H |
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#include <linux/magic.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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|
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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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#define OCFS2_XATTR_BLOCK_SIGNATURE "XATTR01" |
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#define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1" |
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#define OCFS2_DX_ROOT_SIGNATURE "DXDIR01" |
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#define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1" |
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#define OCFS2_REFCOUNT_BLOCK_SIGNATURE "REFCNT1" |
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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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| OCFS2_FEATURE_COMPAT_JBD2_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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| OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \ |
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| OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \ |
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| OCFS2_FEATURE_INCOMPAT_XATTR \ |
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| OCFS2_FEATURE_INCOMPAT_META_ECC \ |
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| OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS \ |
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| OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE \ |
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| OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG \ |
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| OCFS2_FEATURE_INCOMPAT_CLUSTERINFO \ |
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| OCFS2_FEATURE_INCOMPAT_APPEND_DIO) |
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#define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \ |
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| OCFS2_FEATURE_RO_COMPAT_USRQUOTA \ |
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| OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) |
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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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|
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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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|
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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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* Support for alternate, userspace cluster stacks. If set, the superblock |
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* field s_cluster_info contains a tag for the alternate stack in use as |
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* well as the name of the cluster being joined. |
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* mount.ocfs2 must pass in a matching stack name. |
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* |
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* If not set, the classic stack will be used. This is compatbile with |
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* all older versions. |
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*/ |
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#define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080 |
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/* Support for the extended slot map */ |
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#define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100 |
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/* Support for extended attributes */ |
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#define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200 |
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/* Support for indexed directores */ |
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#define OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS 0x0400 |
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/* Metadata checksum and error correction */ |
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#define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800 |
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/* Refcount tree support */ |
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#define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000 |
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/* Discontiguous block groups */ |
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#define OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG 0x2000 |
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/* |
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* Incompat bit to indicate useable clusterinfo with stackflags for all |
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* cluster stacks (userspace adnd o2cb). If this bit is set, |
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* INCOMPAT_USERSPACE_STACK becomes superfluous and thus should not be set. |
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*/ |
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#define OCFS2_FEATURE_INCOMPAT_CLUSTERINFO 0x4000 |
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/* |
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* Append Direct IO support |
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*/ |
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#define OCFS2_FEATURE_INCOMPAT_APPEND_DIO 0x8000 |
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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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* The filesystem will correctly handle journal feature bits. |
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*/ |
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#define OCFS2_FEATURE_COMPAT_JBD2_SB 0x0002 |
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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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/* |
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* Maintain quota information for this filesystem |
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*/ |
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#define OCFS2_FEATURE_RO_COMPAT_USRQUOTA 0x0002 |
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#define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA 0x0004 |
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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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#define OCFS2_QUOTA_FL (0x00001000) /* Quota file */ |
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#define OCFS2_DIO_ORPHANED_FL (0X00002000) /* On the orphan list especially |
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* for dio */ |
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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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#define OCFS2_HAS_REFCOUNT_FL (0x0010) |
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/* Inode attributes, keep in sync with EXT2 */ |
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#define OCFS2_SECRM_FL FS_SECRM_FL /* Secure deletion */ |
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#define OCFS2_UNRM_FL FS_UNRM_FL /* Undelete */ |
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#define OCFS2_COMPR_FL FS_COMPR_FL /* Compress file */ |
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#define OCFS2_SYNC_FL FS_SYNC_FL /* Synchronous updates */ |
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#define OCFS2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */ |
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#define OCFS2_APPEND_FL FS_APPEND_FL /* writes to file may only append */ |
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#define OCFS2_NODUMP_FL FS_NODUMP_FL /* do not dump file */ |
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#define OCFS2_NOATIME_FL FS_NOATIME_FL /* do not update atime */ |
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/* Reserved for compression usage... */ |
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#define OCFS2_DIRTY_FL FS_DIRTY_FL |
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#define OCFS2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */ |
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#define OCFS2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */ |
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#define OCFS2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */ |
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/* End compression flags --- maybe not all used */ |
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#define OCFS2_BTREE_FL FS_BTREE_FL /* btree format dir */ |
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#define OCFS2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */ |
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#define OCFS2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */ |
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#define OCFS2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */ |
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#define OCFS2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */ |
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#define OCFS2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */ |
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#define OCFS2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/ |
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#define OCFS2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */ |
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#define OCFS2_FL_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */ |
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#define OCFS2_FL_MODIFIABLE FS_FL_USER_MODIFIABLE /* 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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#define OCFS2_EXT_REFCOUNTED (0x02) /* Extent is reference |
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* counted in an associated |
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* refcount tree */ |
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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 ((u16)-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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/* The cluster stack fields */ |
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#define OCFS2_STACK_LABEL_LEN 4 |
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#define OCFS2_CLUSTER_NAME_LEN 16 |
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/* Classic (historically speaking) cluster stack */ |
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#define OCFS2_CLASSIC_CLUSTER_STACK "o2cb" |
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/* Journal limits (in bytes) */ |
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#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) |
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/* |
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* Inline extended attribute size (in bytes) |
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* The value chosen should be aligned to 16 byte boundaries. |
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*/ |
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#define OCFS2_MIN_XATTR_INLINE_SIZE 256 |
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/* |
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* Cluster info flags (ocfs2_cluster_info.ci_stackflags) |
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*/ |
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#define OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT (0x01) |
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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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#define OCFS2_FIRST_ONLINE_SYSTEM_INODE GLOBAL_INODE_ALLOC_SYSTEM_INODE |
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SLOT_MAP_SYSTEM_INODE, |
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HEARTBEAT_SYSTEM_INODE, |
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GLOBAL_BITMAP_SYSTEM_INODE, |
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USER_QUOTA_SYSTEM_INODE, |
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GROUP_QUOTA_SYSTEM_INODE, |
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#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_SYSTEM_INODE |
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#define OCFS2_FIRST_LOCAL_SYSTEM_INODE ORPHAN_DIR_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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LOCAL_USER_QUOTA_SYSTEM_INODE, |
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LOCAL_GROUP_QUOTA_SYSTEM_INODE, |
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#define OCFS2_LAST_LOCAL_SYSTEM_INODE LOCAL_GROUP_QUOTA_SYSTEM_INODE |
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NUM_SYSTEM_INODES |
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}; |
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#define NUM_GLOBAL_SYSTEM_INODES OCFS2_FIRST_LOCAL_SYSTEM_INODE |
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#define NUM_LOCAL_SYSTEM_INODES \ |
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(NUM_SYSTEM_INODES - OCFS2_FIRST_LOCAL_SYSTEM_INODE) |
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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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|
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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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[USER_QUOTA_SYSTEM_INODE] = { "aquota.user", OCFS2_QUOTA_FL, S_IFREG | 0644 }, |
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[GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 }, |
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|
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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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[LOCAL_USER_QUOTA_SYSTEM_INODE] = { "aquota.user:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 }, |
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[LOCAL_GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 }, |
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}; |
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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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#define OCFS2_HB_GLOBAL "heartbeat=global" |
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|
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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_DIR_MIN_REC_LEN OCFS2_DIR_REC_LEN(1) |
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|
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#define OCFS2_LINK_MAX 32000 |
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#define OCFS2_DX_LINK_MAX ((1U << 31) - 1U) |
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#define OCFS2_LINKS_HI_SHIFT 16 |
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#define OCFS2_DX_ENTRIES_MAX (0xffffffffU) |
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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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/* |
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* Block checking structure. This is used in metadata to validate the |
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* contents. If OCFS2_FEATURE_INCOMPAT_META_ECC is not set, it is all |
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* zeros. |
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*/ |
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struct ocfs2_block_check { |
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/*00*/ __le32 bc_crc32e; /* 802.3 Ethernet II CRC32 */ |
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__le16 bc_ecc; /* Single-error-correction parity vector. |
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This is a simple Hamming code dependent |
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on the blocksize. OCFS2's maximum |
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blocksize, 4K, requires 16 parity bits, |
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so we fit in __le16. */ |
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__le16 bc_reserved1; |
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/*08*/ |
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}; |
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|
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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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}; |
|
__le64 e_blkno; /* Physical disk offset, in blocks */ |
|
/*10*/ |
|
}; |
|
|
|
struct ocfs2_chain_rec { |
|
__le32 c_free; /* Number of free bits in this chain. */ |
|
__le32 c_total; /* Number of total bits in this chain */ |
|
__le64 c_blkno; /* Physical disk offset (blocks) of 1st group */ |
|
}; |
|
|
|
struct ocfs2_truncate_rec { |
|
__le32 t_start; /* 1st cluster in this log */ |
|
__le32 t_clusters; /* Number of total clusters covered */ |
|
}; |
|
|
|
/* |
|
* On disk extent list for OCFS2 (node in the tree). Note that this |
|
* is contained inside ocfs2_dinode or ocfs2_extent_block, so the |
|
* offsets are relative to ocfs2_dinode.id2.i_list or |
|
* ocfs2_extent_block.h_list, respectively. |
|
*/ |
|
struct ocfs2_extent_list { |
|
/*00*/ __le16 l_tree_depth; /* Extent tree depth from this |
|
point. 0 means data extents |
|
hang directly off this |
|
header (a leaf) |
|
NOTE: The high 8 bits cannot be |
|
used - tree_depth is never that big. |
|
*/ |
|
__le16 l_count; /* Number of extent records */ |
|
__le16 l_next_free_rec; /* Next unused extent slot */ |
|
__le16 l_reserved1; |
|
__le64 l_reserved2; /* Pad to |
|
sizeof(ocfs2_extent_rec) */ |
|
/*10*/ struct ocfs2_extent_rec l_recs[]; /* 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[]; /* 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[]; /* Truncate records */ |
|
}; |
|
|
|
/* |
|
* On disk extent block (indirect block) for OCFS2 |
|
*/ |
|
struct ocfs2_extent_block |
|
{ |
|
/*00*/ __u8 h_signature[8]; /* Signature for verification */ |
|
struct ocfs2_block_check h_check; /* Error checking */ |
|
/*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_suballoc_loc; /* Suballocator block group this |
|
eb belongs to. Only valid |
|
if allocated from a |
|
discontiguous block group */ |
|
__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 slot map for OCFS2. This defines the contents of the "slot_map" |
|
* system file. A slot is valid if it contains a node number >= 0. The |
|
* value -1 (0xFFFF) is OCFS2_INVALID_SLOT. This marks a slot empty. |
|
*/ |
|
struct ocfs2_slot_map { |
|
/*00*/ DECLARE_FLEX_ARRAY(__le16, sm_slots); |
|
/* |
|
* Actual on-disk size is one block. OCFS2_MAX_SLOTS is 255, |
|
* 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize. |
|
*/ |
|
}; |
|
|
|
struct ocfs2_extended_slot { |
|
/*00*/ __u8 es_valid; |
|
__u8 es_reserved1[3]; |
|
__le32 es_node_num; |
|
/*08*/ |
|
}; |
|
|
|
/* |
|
* The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP |
|
* is set. It separates out the valid marker from the node number, and |
|
* has room to grow. Unlike the old slot map, this format is defined by |
|
* i_size. |
|
*/ |
|
struct ocfs2_slot_map_extended { |
|
/*00*/ DECLARE_FLEX_ARRAY(struct ocfs2_extended_slot, se_slots); |
|
/* |
|
* Actual size is i_size of the slot_map system file. It should |
|
* match s_max_slots * sizeof(struct ocfs2_extended_slot) |
|
*/ |
|
}; |
|
|
|
/* |
|
* ci_stackflags is only valid if the incompat bit |
|
* OCFS2_FEATURE_INCOMPAT_CLUSTERINFO is set. |
|
*/ |
|
struct ocfs2_cluster_info { |
|
/*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN]; |
|
union { |
|
__le32 ci_reserved; |
|
struct { |
|
__u8 ci_stackflags; |
|
__u8 ci_reserved1; |
|
__u8 ci_reserved2; |
|
__u8 ci_reserved3; |
|
}; |
|
}; |
|
/*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN]; |
|
/*18*/ |
|
}; |
|
|
|
/* |
|
* 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_uuid_hash; /* hash value of uuid */ |
|
__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*/ struct ocfs2_cluster_info s_cluster_info; /* Only valid if either |
|
userspace or clusterinfo |
|
INCOMPAT flag set. */ |
|
/*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size |
|
for this fs*/ |
|
__le16 s_reserved0; |
|
__le32 s_dx_seed[3]; /* seed[0-2] for dx dir hash. |
|
* s_uuid_hash serves as seed[3]. */ |
|
/*C0*/ __le64 s_reserved2[15]; /* Fill out superblock */ |
|
/*140*/ |
|
|
|
/* |
|
* NOTE: As stated above, all offsets are relative to |
|
* ocfs2_dinode.id2, which is at 0xC0 in the inode. |
|
* 0xC0 + 0x140 = 0x200 or 512 bytes. A superblock must fit within |
|
* our smallest blocksize, which is 512 bytes. To ensure this, |
|
* we reserve the space in s_reserved2. Anything past s_reserved2 |
|
* will not be available on the smallest blocksize. |
|
*/ |
|
}; |
|
|
|
/* |
|
* 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[]; |
|
}; |
|
|
|
/* |
|
* 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[]; /* 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*/ __le16 i_links_count_hi; /* High 16 bits of links count */ |
|
__le16 i_xattr_inline_size; |
|
__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; |
|
/*70*/ __le32 i_attr; |
|
__le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL |
|
was set in i_flags */ |
|
__le16 i_dyn_features; |
|
__le64 i_xattr_loc; |
|
/*80*/ struct ocfs2_block_check i_check; /* Error checking */ |
|
/*88*/ __le64 i_dx_root; /* Pointer to dir index root block */ |
|
/*90*/ __le64 i_refcount_loc; |
|
__le64 i_suballoc_loc; /* Suballocator block group this |
|
inode belongs to. Only valid |
|
if allocated from a |
|
discontiguous block group */ |
|
/*A0*/ __le16 i_dio_orphaned_slot; /* only used for append dio write */ |
|
__le16 i_reserved1[3]; |
|
__le64 i_reserved2[2]; |
|
/*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_recovery_generation; /* Incremented when the |
|
journal is recovered |
|
after an unclean |
|
shutdown */ |
|
} journal1; |
|
} id1; /* Inode type dependent 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; |
|
DECLARE_FLEX_ARRAY(__u8, i_symlink); |
|
} 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)); |
|
|
|
/* |
|
* Per-block record for the unindexed directory btree. This is carefully |
|
* crafted so that the rec_len and name_len records of an ocfs2_dir_entry are |
|
* mirrored. That way, the directory manipulation code needs a minimal amount |
|
* of update. |
|
* |
|
* NOTE: Keep this structure aligned to a multiple of 4 bytes. |
|
*/ |
|
struct ocfs2_dir_block_trailer { |
|
/*00*/ __le64 db_compat_inode; /* Always zero. Was inode */ |
|
|
|
__le16 db_compat_rec_len; /* Backwards compatible with |
|
* ocfs2_dir_entry. */ |
|
__u8 db_compat_name_len; /* Always zero. Was name_len */ |
|
__u8 db_reserved0; |
|
__le16 db_reserved1; |
|
__le16 db_free_rec_len; /* Size of largest empty hole |
|
* in this block. (unused) */ |
|
/*10*/ __u8 db_signature[8]; /* Signature for verification */ |
|
__le64 db_reserved2; |
|
/*20*/ __le64 db_free_next; /* Next block in list (unused) */ |
|
__le64 db_blkno; /* Offset on disk, in blocks */ |
|
/*30*/ __le64 db_parent_dinode; /* dinode which owns me, in |
|
blocks */ |
|
struct ocfs2_block_check db_check; /* Error checking */ |
|
/*40*/ |
|
}; |
|
|
|
/* |
|
* A directory entry in the indexed tree. We don't store the full name here, |
|
* but instead provide a pointer to the full dirent in the unindexed tree. |
|
* |
|
* We also store name_len here so as to reduce the number of leaf blocks we |
|
* need to search in case of collisions. |
|
*/ |
|
struct ocfs2_dx_entry { |
|
__le32 dx_major_hash; /* Used to find logical |
|
* cluster in index */ |
|
__le32 dx_minor_hash; /* Lower bits used to find |
|
* block in cluster */ |
|
__le64 dx_dirent_blk; /* Physical block in unindexed |
|
* tree holding this dirent. */ |
|
}; |
|
|
|
struct ocfs2_dx_entry_list { |
|
__le32 de_reserved; |
|
__le16 de_count; /* Maximum number of entries |
|
* possible in de_entries */ |
|
__le16 de_num_used; /* Current number of |
|
* de_entries entries */ |
|
struct ocfs2_dx_entry de_entries[]; /* Indexed dir entries |
|
* in a packed array of |
|
* length de_num_used */ |
|
}; |
|
|
|
#define OCFS2_DX_FLAG_INLINE 0x01 |
|
|
|
/* |
|
* A directory indexing block. Each indexed directory has one of these, |
|
* pointed to by ocfs2_dinode. |
|
* |
|
* This block stores an indexed btree root, and a set of free space |
|
* start-of-list pointers. |
|
*/ |
|
struct ocfs2_dx_root_block { |
|
__u8 dr_signature[8]; /* Signature for verification */ |
|
struct ocfs2_block_check dr_check; /* Error checking */ |
|
__le16 dr_suballoc_slot; /* Slot suballocator this |
|
* block belongs to. */ |
|
__le16 dr_suballoc_bit; /* Bit offset in suballocator |
|
* block group */ |
|
__le32 dr_fs_generation; /* Must match super block */ |
|
__le64 dr_blkno; /* Offset on disk, in blocks */ |
|
__le64 dr_last_eb_blk; /* Pointer to last |
|
* extent block */ |
|
__le32 dr_clusters; /* Clusters allocated |
|
* to the indexed tree. */ |
|
__u8 dr_flags; /* OCFS2_DX_FLAG_* flags */ |
|
__u8 dr_reserved0; |
|
__le16 dr_reserved1; |
|
__le64 dr_dir_blkno; /* Pointer to parent inode */ |
|
__le32 dr_num_entries; /* Total number of |
|
* names stored in |
|
* this directory.*/ |
|
__le32 dr_reserved2; |
|
__le64 dr_free_blk; /* Pointer to head of free |
|
* unindexed block list. */ |
|
__le64 dr_suballoc_loc; /* Suballocator block group |
|
this root belongs to. |
|
Only valid if allocated |
|
from a discontiguous |
|
block group */ |
|
__le64 dr_reserved3[14]; |
|
union { |
|
struct ocfs2_extent_list dr_list; /* Keep this aligned to 128 |
|
* bits for maximum space |
|
* efficiency. */ |
|
struct ocfs2_dx_entry_list dr_entries; /* In-root-block list of |
|
* entries. We grow out |
|
* to extents if this |
|
* gets too big. */ |
|
}; |
|
}; |
|
|
|
/* |
|
* The header of a leaf block in the indexed tree. |
|
*/ |
|
struct ocfs2_dx_leaf { |
|
__u8 dl_signature[8];/* Signature for verification */ |
|
struct ocfs2_block_check dl_check; /* Error checking */ |
|
__le64 dl_blkno; /* Offset on disk, in blocks */ |
|
__le32 dl_fs_generation;/* Must match super block */ |
|
__le32 dl_reserved0; |
|
__le64 dl_reserved1; |
|
struct ocfs2_dx_entry_list dl_list; |
|
}; |
|
|
|
/* |
|
* Largest bitmap for a block (suballocator) group in bytes. This limit |
|
* does not affect cluster groups (global allocator). Cluster group |
|
* bitmaps run to the end of the block. |
|
*/ |
|
#define OCFS2_MAX_BG_BITMAP_SIZE 256 |
|
|
|
/* |
|
* 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*/ struct ocfs2_block_check bg_check; /* Error checking */ |
|
__le64 bg_reserved2; |
|
/*40*/ union { |
|
DECLARE_FLEX_ARRAY(__u8, bg_bitmap); |
|
struct { |
|
/* |
|
* Block groups may be discontiguous when |
|
* OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG is set. |
|
* The extents of a discontiguous block group are |
|
* stored in bg_list. It is a flat list. |
|
* l_tree_depth must always be zero. A |
|
* discontiguous group is signified by a non-zero |
|
* bg_list->l_next_free_rec. Only block groups |
|
* can be discontiguous; Cluster groups cannot. |
|
* We've never made a block group with more than |
|
* 2048 blocks (256 bytes of bg_bitmap). This |
|
* codifies that limit so that we can fit bg_list. |
|
* bg_size of a discontiguous block group will |
|
* be 256 to match bg_bitmap_filler. |
|
*/ |
|
__u8 bg_bitmap_filler[OCFS2_MAX_BG_BITMAP_SIZE]; |
|
/*140*/ struct ocfs2_extent_list bg_list; |
|
}; |
|
}; |
|
/* Actual on-disk size is one block */ |
|
}; |
|
|
|
struct ocfs2_refcount_rec { |
|
/*00*/ __le64 r_cpos; /* Physical offset, in clusters */ |
|
__le32 r_clusters; /* Clusters covered by this extent */ |
|
__le32 r_refcount; /* Reference count of this extent */ |
|
/*10*/ |
|
}; |
|
#define OCFS2_32BIT_POS_MASK (0xffffffffULL) |
|
|
|
#define OCFS2_REFCOUNT_LEAF_FL (0x00000001) |
|
#define OCFS2_REFCOUNT_TREE_FL (0x00000002) |
|
|
|
struct ocfs2_refcount_list { |
|
/*00*/ __le16 rl_count; /* Maximum number of entries possible |
|
in rl_records */ |
|
__le16 rl_used; /* Current number of used records */ |
|
__le32 rl_reserved2; |
|
__le64 rl_reserved1; /* Pad to sizeof(ocfs2_refcount_record) */ |
|
/*10*/ struct ocfs2_refcount_rec rl_recs[]; /* Refcount records */ |
|
}; |
|
|
|
|
|
struct ocfs2_refcount_block { |
|
/*00*/ __u8 rf_signature[8]; /* Signature for verification */ |
|
__le16 rf_suballoc_slot; /* Slot suballocator this block |
|
belongs to */ |
|
__le16 rf_suballoc_bit; /* Bit offset in suballocator |
|
block group */ |
|
__le32 rf_fs_generation; /* Must match superblock */ |
|
/*10*/ __le64 rf_blkno; /* Offset on disk, in blocks */ |
|
__le64 rf_parent; /* Parent block, only valid if |
|
OCFS2_REFCOUNT_LEAF_FL is set in |
|
rf_flags */ |
|
/*20*/ struct ocfs2_block_check rf_check; /* Error checking */ |
|
__le64 rf_last_eb_blk; /* Pointer to last extent block */ |
|
/*30*/ __le32 rf_count; /* Number of inodes sharing this |
|
refcount tree */ |
|
__le32 rf_flags; /* See the flags above */ |
|
__le32 rf_clusters; /* clusters covered by refcount tree. */ |
|
__le32 rf_cpos; /* cluster offset in refcount tree.*/ |
|
/*40*/ __le32 rf_generation; /* generation number. all be the same |
|
* for the same refcount tree. */ |
|
__le32 rf_reserved0; |
|
__le64 rf_suballoc_loc; /* Suballocator block group this |
|
refcount block belongs to. Only |
|
valid if allocated from a |
|
discontiguous block group */ |
|
/*50*/ __le64 rf_reserved1[6]; |
|
/*80*/ union { |
|
struct ocfs2_refcount_list rf_records; /* List of refcount |
|
records */ |
|
struct ocfs2_extent_list rf_list; /* Extent record list, |
|
only valid if |
|
OCFS2_REFCOUNT_TREE_FL |
|
is set in rf_flags */ |
|
}; |
|
/* Actual on-disk size is one block */ |
|
}; |
|
|
|
/* |
|
* On disk extended attribute structure for OCFS2. |
|
*/ |
|
|
|
/* |
|
* ocfs2_xattr_entry indicates one extend attribute. |
|
* |
|
* Note that it can be stored in inode, one block or one xattr bucket. |
|
*/ |
|
struct ocfs2_xattr_entry { |
|
__le32 xe_name_hash; /* hash value of xattr prefix+suffix. */ |
|
__le16 xe_name_offset; /* byte offset from the 1st entry in the |
|
local xattr storage(inode, xattr block or |
|
xattr bucket). */ |
|
__u8 xe_name_len; /* xattr name len, doesn't include prefix. */ |
|
__u8 xe_type; /* the low 7 bits indicate the name prefix |
|
* type and the highest bit indicates whether |
|
* the EA is stored in the local storage. */ |
|
__le64 xe_value_size; /* real xattr value length. */ |
|
}; |
|
|
|
/* |
|
* On disk structure for xattr header. |
|
* |
|
* One ocfs2_xattr_header describes how many ocfs2_xattr_entry records in |
|
* the local xattr storage. |
|
*/ |
|
struct ocfs2_xattr_header { |
|
__le16 xh_count; /* contains the count of how |
|
many records are in the |
|
local xattr storage. */ |
|
__le16 xh_free_start; /* current offset for storing |
|
xattr. */ |
|
__le16 xh_name_value_len; /* total length of name/value |
|
length in this bucket. */ |
|
__le16 xh_num_buckets; /* Number of xattr buckets |
|
in this extent record, |
|
only valid in the first |
|
bucket. */ |
|
struct ocfs2_block_check xh_check; /* Error checking |
|
(Note, this is only |
|
used for xattr |
|
buckets. A block uses |
|
xb_check and sets |
|
this field to zero.) */ |
|
struct ocfs2_xattr_entry xh_entries[]; /* xattr entry list. */ |
|
}; |
|
|
|
/* |
|
* On disk structure for xattr value root. |
|
* |
|
* When an xattr's value is large enough, it is stored in an external |
|
* b-tree like file data. The xattr value root points to this structure. |
|
*/ |
|
struct ocfs2_xattr_value_root { |
|
/*00*/ __le32 xr_clusters; /* clusters covered by xattr value. */ |
|
__le32 xr_reserved0; |
|
__le64 xr_last_eb_blk; /* Pointer to last extent block */ |
|
/*10*/ struct ocfs2_extent_list xr_list; /* Extent record list */ |
|
}; |
|
|
|
/* |
|
* On disk structure for xattr tree root. |
|
* |
|
* It is used when there are too many extended attributes for one file. These |
|
* attributes will be organized and stored in an indexed-btree. |
|
*/ |
|
struct ocfs2_xattr_tree_root { |
|
/*00*/ __le32 xt_clusters; /* clusters covered by xattr. */ |
|
__le32 xt_reserved0; |
|
__le64 xt_last_eb_blk; /* Pointer to last extent block */ |
|
/*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */ |
|
}; |
|
|
|
#define OCFS2_XATTR_INDEXED 0x1 |
|
#define OCFS2_HASH_SHIFT 5 |
|
#define OCFS2_XATTR_ROUND 3 |
|
#define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \ |
|
~(OCFS2_XATTR_ROUND)) |
|
|
|
#define OCFS2_XATTR_BUCKET_SIZE 4096 |
|
#define OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET (OCFS2_XATTR_BUCKET_SIZE \ |
|
/ OCFS2_MIN_BLOCKSIZE) |
|
|
|
/* |
|
* On disk structure for xattr block. |
|
*/ |
|
struct ocfs2_xattr_block { |
|
/*00*/ __u8 xb_signature[8]; /* Signature for verification */ |
|
__le16 xb_suballoc_slot; /* Slot suballocator this |
|
block belongs to. */ |
|
__le16 xb_suballoc_bit; /* Bit offset in suballocator |
|
block group */ |
|
__le32 xb_fs_generation; /* Must match super block */ |
|
/*10*/ __le64 xb_blkno; /* Offset on disk, in blocks */ |
|
struct ocfs2_block_check xb_check; /* Error checking */ |
|
/*20*/ __le16 xb_flags; /* Indicates whether this block contains |
|
real xattr or a xattr tree. */ |
|
__le16 xb_reserved0; |
|
__le32 xb_reserved1; |
|
__le64 xb_suballoc_loc; /* Suballocator block group this |
|
xattr block belongs to. Only |
|
valid if allocated from a |
|
discontiguous block group */ |
|
/*30*/ union { |
|
struct ocfs2_xattr_header xb_header; /* xattr header if this |
|
block contains xattr */ |
|
struct ocfs2_xattr_tree_root xb_root;/* xattr tree root if this |
|
block cotains xattr |
|
tree. */ |
|
} xb_attrs; |
|
}; |
|
|
|
#define OCFS2_XATTR_ENTRY_LOCAL 0x80 |
|
#define OCFS2_XATTR_TYPE_MASK 0x7F |
|
static inline void ocfs2_xattr_set_local(struct ocfs2_xattr_entry *xe, |
|
int local) |
|
{ |
|
if (local) |
|
xe->xe_type |= OCFS2_XATTR_ENTRY_LOCAL; |
|
else |
|
xe->xe_type &= ~OCFS2_XATTR_ENTRY_LOCAL; |
|
} |
|
|
|
static inline int ocfs2_xattr_is_local(struct ocfs2_xattr_entry *xe) |
|
{ |
|
return xe->xe_type & OCFS2_XATTR_ENTRY_LOCAL; |
|
} |
|
|
|
static inline void ocfs2_xattr_set_type(struct ocfs2_xattr_entry *xe, int type) |
|
{ |
|
xe->xe_type |= type & OCFS2_XATTR_TYPE_MASK; |
|
} |
|
|
|
static inline int ocfs2_xattr_get_type(struct ocfs2_xattr_entry *xe) |
|
{ |
|
return xe->xe_type & OCFS2_XATTR_TYPE_MASK; |
|
} |
|
|
|
/* |
|
* On disk structures for global quota file |
|
*/ |
|
|
|
/* Magic numbers and known versions for global quota files */ |
|
#define OCFS2_GLOBAL_QMAGICS {\ |
|
0x0cf52470, /* USRQUOTA */ \ |
|
0x0cf52471 /* GRPQUOTA */ \ |
|
} |
|
|
|
#define OCFS2_GLOBAL_QVERSIONS {\ |
|
0, \ |
|
0, \ |
|
} |
|
|
|
|
|
/* Each block of each quota file has a certain fixed number of bytes reserved |
|
* for OCFS2 internal use at its end. OCFS2 can use it for things like |
|
* checksums, etc. */ |
|
#define OCFS2_QBLK_RESERVED_SPACE 8 |
|
|
|
/* Generic header of all quota files */ |
|
struct ocfs2_disk_dqheader { |
|
__le32 dqh_magic; /* Magic number identifying file */ |
|
__le32 dqh_version; /* Quota format version */ |
|
}; |
|
|
|
#define OCFS2_GLOBAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader)) |
|
|
|
/* Information header of global quota file (immediately follows the generic |
|
* header) */ |
|
struct ocfs2_global_disk_dqinfo { |
|
/*00*/ __le32 dqi_bgrace; /* Grace time for space softlimit excess */ |
|
__le32 dqi_igrace; /* Grace time for inode softlimit excess */ |
|
__le32 dqi_syncms; /* Time after which we sync local changes to |
|
* global quota file */ |
|
__le32 dqi_blocks; /* Number of blocks in quota file */ |
|
/*10*/ __le32 dqi_free_blk; /* First free block in quota file */ |
|
__le32 dqi_free_entry; /* First block with free dquot entry in quota |
|
* file */ |
|
}; |
|
|
|
/* Structure with global user / group information. We reserve some space |
|
* for future use. */ |
|
struct ocfs2_global_disk_dqblk { |
|
/*00*/ __le32 dqb_id; /* ID the structure belongs to */ |
|
__le32 dqb_use_count; /* Number of nodes having reference to this structure */ |
|
__le64 dqb_ihardlimit; /* absolute limit on allocated inodes */ |
|
/*10*/ __le64 dqb_isoftlimit; /* preferred inode limit */ |
|
__le64 dqb_curinodes; /* current # allocated inodes */ |
|
/*20*/ __le64 dqb_bhardlimit; /* absolute limit on disk space */ |
|
__le64 dqb_bsoftlimit; /* preferred limit on disk space */ |
|
/*30*/ __le64 dqb_curspace; /* current space occupied */ |
|
__le64 dqb_btime; /* time limit for excessive disk use */ |
|
/*40*/ __le64 dqb_itime; /* time limit for excessive inode use */ |
|
__le64 dqb_pad1; |
|
/*50*/ __le64 dqb_pad2; |
|
}; |
|
|
|
/* |
|
* On-disk structures for local quota file |
|
*/ |
|
|
|
/* Magic numbers and known versions for local quota files */ |
|
#define OCFS2_LOCAL_QMAGICS {\ |
|
0x0cf524c0, /* USRQUOTA */ \ |
|
0x0cf524c1 /* GRPQUOTA */ \ |
|
} |
|
|
|
#define OCFS2_LOCAL_QVERSIONS {\ |
|
0, \ |
|
0, \ |
|
} |
|
|
|
/* Quota flags in dqinfo header */ |
|
#define OLQF_CLEAN 0x0001 /* Quota file is empty (this should be after\ |
|
* quota has been cleanly turned off) */ |
|
|
|
#define OCFS2_LOCAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader)) |
|
|
|
/* Information header of local quota file (immediately follows the generic |
|
* header) */ |
|
struct ocfs2_local_disk_dqinfo { |
|
__le32 dqi_flags; /* Flags for quota file */ |
|
__le32 dqi_chunks; /* Number of chunks of quota structures |
|
* with a bitmap */ |
|
__le32 dqi_blocks; /* Number of blocks allocated for quota file */ |
|
}; |
|
|
|
/* Header of one chunk of a quota file */ |
|
struct ocfs2_local_disk_chunk { |
|
__le32 dqc_free; /* Number of free entries in the bitmap */ |
|
__u8 dqc_bitmap[]; /* Bitmap of entries in the corresponding |
|
* chunk of quota file */ |
|
}; |
|
|
|
/* One entry in local quota file */ |
|
struct ocfs2_local_disk_dqblk { |
|
/*00*/ __le64 dqb_id; /* id this quota applies to */ |
|
__le64 dqb_spacemod; /* Change in the amount of used space */ |
|
/*10*/ __le64 dqb_inodemod; /* Change in the amount of used inodes */ |
|
}; |
|
|
|
|
|
/* |
|
* The quota trailer lives at the end of each quota block. |
|
*/ |
|
|
|
struct ocfs2_disk_dqtrailer { |
|
/*00*/ struct ocfs2_block_check dq_check; /* Error checking */ |
|
/*08*/ /* Cannot be larger than OCFS2_QBLK_RESERVED_SPACE */ |
|
}; |
|
|
|
static inline struct ocfs2_disk_dqtrailer *ocfs2_block_dqtrailer(int blocksize, |
|
void *buf) |
|
{ |
|
char *ptr = buf; |
|
ptr += blocksize - OCFS2_QBLK_RESERVED_SPACE; |
|
|
|
return (struct ocfs2_disk_dqtrailer *)ptr; |
|
} |
|
|
|
#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_with_xattr(struct super_block *sb, |
|
struct ocfs2_dinode *di) |
|
{ |
|
unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size); |
|
|
|
if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL) |
|
return sb->s_blocksize - |
|
offsetof(struct ocfs2_dinode, id2.i_data.id_data) - |
|
xattrsize; |
|
else |
|
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_extent_recs_per_inode_with_xattr( |
|
struct super_block *sb, |
|
struct ocfs2_dinode *di) |
|
{ |
|
int size; |
|
unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size); |
|
|
|
if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL) |
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_dinode, id2.i_list.l_recs) - |
|
xattrsize; |
|
else |
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_dinode, id2.i_list.l_recs); |
|
|
|
return size / sizeof(struct ocfs2_extent_rec); |
|
} |
|
|
|
static inline int ocfs2_extent_recs_per_dx_root(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_dx_root_block, dr_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_extent_recs_per_gd(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_group_desc, bg_list.l_recs); |
|
|
|
return size / sizeof(struct ocfs2_extent_rec); |
|
} |
|
|
|
static inline int ocfs2_dx_entries_per_leaf(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_dx_leaf, dl_list.de_entries); |
|
|
|
return size / sizeof(struct ocfs2_dx_entry); |
|
} |
|
|
|
static inline int ocfs2_dx_entries_per_root(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_dx_root_block, dr_entries.de_entries); |
|
|
|
return size / sizeof(struct ocfs2_dx_entry); |
|
} |
|
|
|
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 suballocator, |
|
u32 feature_incompat) |
|
{ |
|
int size = sb->s_blocksize - |
|
offsetof(struct ocfs2_group_desc, bg_bitmap); |
|
|
|
/* |
|
* The cluster allocator uses the entire block. Suballocators have |
|
* never used more than OCFS2_MAX_BG_BITMAP_SIZE. Unfortunately, older |
|
* code expects bg_size set to the maximum. Thus we must keep |
|
* bg_size as-is unless discontig_bg is enabled. |
|
*/ |
|
if (suballocator && |
|
(feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)) |
|
size = OCFS2_MAX_BG_BITMAP_SIZE; |
|
|
|
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; |
|
|
|
} |
|
|
|
static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_xattr_block, |
|
xb_attrs.xb_root.xt_list.l_recs); |
|
|
|
return size / sizeof(struct ocfs2_extent_rec); |
|
} |
|
|
|
static inline u16 ocfs2_extent_recs_per_rb(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_refcount_block, rf_list.l_recs); |
|
|
|
return size / sizeof(struct ocfs2_extent_rec); |
|
} |
|
|
|
static inline u16 ocfs2_refcount_recs_per_rb(struct super_block *sb) |
|
{ |
|
int size; |
|
|
|
size = sb->s_blocksize - |
|
offsetof(struct ocfs2_refcount_block, rf_records.rl_recs); |
|
|
|
return size / sizeof(struct ocfs2_refcount_rec); |
|
} |
|
|
|
static inline u32 |
|
ocfs2_get_ref_rec_low_cpos(const struct ocfs2_refcount_rec *rec) |
|
{ |
|
return le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK; |
|
} |
|
#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_with_xattr(int blocksize, |
|
struct ocfs2_dinode *di) |
|
{ |
|
if (di && (di->i_dyn_features & OCFS2_INLINE_XATTR_FL)) |
|
return blocksize - |
|
offsetof(struct ocfs2_dinode, id2.i_data.id_data) - |
|
di->i_xattr_inline_size; |
|
else |
|
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_extent_recs_per_gd(int blocksize) |
|
{ |
|
int size; |
|
|
|
size = blocksize - |
|
offsetof(struct ocfs2_group_desc, bg_list.l_recs); |
|
|
|
return size / sizeof(struct ocfs2_extent_rec); |
|
} |
|
|
|
static inline int ocfs2_local_alloc_size(int blocksize) |
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{ |
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int size; |
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|
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size = blocksize - |
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offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); |
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|
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return size; |
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} |
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|
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static inline int ocfs2_group_bitmap_size(int blocksize, |
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int suballocator, |
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uint32_t feature_incompat) |
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{ |
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int size = sb->s_blocksize - |
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offsetof(struct ocfs2_group_desc, bg_bitmap); |
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|
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/* |
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* The cluster allocator uses the entire block. Suballocators have |
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* never used more than OCFS2_MAX_BG_BITMAP_SIZE. Unfortunately, older |
|
* code expects bg_size set to the maximum. Thus we must keep |
|
* bg_size as-is unless discontig_bg is enabled. |
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*/ |
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if (suballocator && |
|
(feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)) |
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size = OCFS2_MAX_BG_BITMAP_SIZE; |
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|
|
return size; |
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} |
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|
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static inline int ocfs2_truncate_recs_per_inode(int blocksize) |
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{ |
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int size; |
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|
|
size = blocksize - |
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offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); |
|
|
|
return size / sizeof(struct ocfs2_truncate_rec); |
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} |
|
|
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static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index) |
|
{ |
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uint64_t offset = OCFS2_BACKUP_SB_START; |
|
|
|
if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { |
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offset <<= (2 * index); |
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offset /= blocksize; |
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return offset; |
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} |
|
|
|
return 0; |
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} |
|
|
|
static inline int ocfs2_xattr_recs_per_xb(int blocksize) |
|
{ |
|
int size; |
|
|
|
size = blocksize - |
|
offsetof(struct ocfs2_xattr_block, |
|
xb_attrs.xb_root.xt_list.l_recs); |
|
|
|
return size / sizeof(struct ocfs2_extent_rec); |
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} |
|
#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, "%s", |
|
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 = fs_umode_to_ftype(mode); |
|
} |
|
|
|
static inline int ocfs2_gd_is_discontig(struct ocfs2_group_desc *gd) |
|
{ |
|
if ((offsetof(struct ocfs2_group_desc, bg_bitmap) + |
|
le16_to_cpu(gd->bg_size)) != |
|
offsetof(struct ocfs2_group_desc, bg_list)) |
|
return 0; |
|
/* |
|
* Only valid to check l_next_free_rec if |
|
* bg_bitmap + bg_size == bg_list. |
|
*/ |
|
if (!gd->bg_list.l_next_free_rec) |
|
return 0; |
|
return 1; |
|
} |
|
#endif /* _OCFS2_FS_H */ |
|
|
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