diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/ocfs2_fs.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/ocfs2/ocfs2_fs.h | 1640 |
1 files changed, 0 insertions, 1640 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/ocfs2_fs.h b/ANDROID_3.4.5/fs/ocfs2/ocfs2_fs.h deleted file mode 100644 index 938387a1..00000000 --- a/ANDROID_3.4.5/fs/ocfs2/ocfs2_fs.h +++ /dev/null @@ -1,1640 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * ocfs2_fs.h - * - * On-disk structures for OCFS2. - * - * Copyright (C) 2002, 2004 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License, version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#ifndef _OCFS2_FS_H -#define _OCFS2_FS_H - -/* Version */ -#define OCFS2_MAJOR_REV_LEVEL 0 -#define OCFS2_MINOR_REV_LEVEL 90 - -/* - * An OCFS2 volume starts this way: - * Sector 0: Valid ocfs1_vol_disk_hdr that cleanly fails to mount OCFS. - * Sector 1: Valid ocfs1_vol_label that cleanly fails to mount OCFS. - * Block OCFS2_SUPER_BLOCK_BLKNO: OCFS2 superblock. - * - * All other structures are found from the superblock information. - * - * OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a - * blocksize of 2K, it is 4096 bytes into disk. - */ -#define OCFS2_SUPER_BLOCK_BLKNO 2 - -/* - * Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could - * grow if needed. - */ -#define OCFS2_MIN_CLUSTERSIZE 4096 -#define OCFS2_MAX_CLUSTERSIZE 1048576 - -/* - * Blocks cannot be bigger than clusters, so the maximum blocksize is the - * minimum cluster size. - */ -#define OCFS2_MIN_BLOCKSIZE 512 -#define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE - -/* Filesystem magic number */ -#define OCFS2_SUPER_MAGIC 0x7461636f - -/* Object signatures */ -#define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2" -#define OCFS2_INODE_SIGNATURE "INODE01" -#define OCFS2_EXTENT_BLOCK_SIGNATURE "EXBLK01" -#define OCFS2_GROUP_DESC_SIGNATURE "GROUP01" -#define OCFS2_XATTR_BLOCK_SIGNATURE "XATTR01" -#define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1" -#define OCFS2_DX_ROOT_SIGNATURE "DXDIR01" -#define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1" -#define OCFS2_REFCOUNT_BLOCK_SIGNATURE "REFCNT1" - -/* Compatibility flags */ -#define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \ - ( OCFS2_SB(sb)->s_feature_compat & (mask) ) -#define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \ - ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) ) -#define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \ - ( OCFS2_SB(sb)->s_feature_incompat & (mask) ) -#define OCFS2_SET_COMPAT_FEATURE(sb,mask) \ - OCFS2_SB(sb)->s_feature_compat |= (mask) -#define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \ - OCFS2_SB(sb)->s_feature_ro_compat |= (mask) -#define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \ - OCFS2_SB(sb)->s_feature_incompat |= (mask) -#define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \ - OCFS2_SB(sb)->s_feature_compat &= ~(mask) -#define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ - OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask) -#define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ - OCFS2_SB(sb)->s_feature_incompat &= ~(mask) - -#define OCFS2_FEATURE_COMPAT_SUPP (OCFS2_FEATURE_COMPAT_BACKUP_SB \ - | OCFS2_FEATURE_COMPAT_JBD2_SB) -#define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ - | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \ - | OCFS2_FEATURE_INCOMPAT_INLINE_DATA \ - | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \ - | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \ - | OCFS2_FEATURE_INCOMPAT_XATTR \ - | OCFS2_FEATURE_INCOMPAT_META_ECC \ - | OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS \ - | OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE \ - | OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG \ - | OCFS2_FEATURE_INCOMPAT_CLUSTERINFO) -#define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \ - | OCFS2_FEATURE_RO_COMPAT_USRQUOTA \ - | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) - -/* - * Heartbeat-only devices are missing journals and other files. The - * filesystem driver can't load them, but the library can. Never put - * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*. - */ -#define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002 - -/* - * tunefs sets this incompat flag before starting the resize and clears it - * at the end. This flag protects users from inadvertently mounting the fs - * after an aborted run without fsck-ing. - */ -#define OCFS2_FEATURE_INCOMPAT_RESIZE_INPROG 0x0004 - -/* Used to denote a non-clustered volume */ -#define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008 - -/* Support for sparse allocation in b-trees */ -#define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010 - -/* - * Tunefs sets this incompat flag before starting an operation which - * would require cleanup on abort. This is done to protect users from - * inadvertently mounting the fs after an aborted run without - * fsck-ing. - * - * s_tunefs_flags on the super block describes precisely which - * operations were in progress. - */ -#define OCFS2_FEATURE_INCOMPAT_TUNEFS_INPROG 0x0020 - -/* Support for data packed into inode blocks */ -#define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040 - -/* - * Support for alternate, userspace cluster stacks. If set, the superblock - * field s_cluster_info contains a tag for the alternate stack in use as - * well as the name of the cluster being joined. - * mount.ocfs2 must pass in a matching stack name. - * - * If not set, the classic stack will be used. This is compatbile with - * all older versions. - */ -#define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080 - -/* Support for the extended slot map */ -#define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100 - -/* Support for extended attributes */ -#define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200 - -/* Support for indexed directores */ -#define OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS 0x0400 - -/* Metadata checksum and error correction */ -#define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800 - -/* Refcount tree support */ -#define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000 - -/* Discontigous block groups */ -#define OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG 0x2000 - -/* - * Incompat bit to indicate useable clusterinfo with stackflags for all - * cluster stacks (userspace adnd o2cb). If this bit is set, - * INCOMPAT_USERSPACE_STACK becomes superfluous and thus should not be set. - */ -#define OCFS2_FEATURE_INCOMPAT_CLUSTERINFO 0x4000 - -/* - * backup superblock flag is used to indicate that this volume - * has backup superblocks. - */ -#define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001 - -/* - * The filesystem will correctly handle journal feature bits. - */ -#define OCFS2_FEATURE_COMPAT_JBD2_SB 0x0002 - -/* - * Unwritten extents support. - */ -#define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001 - -/* - * Maintain quota information for this filesystem - */ -#define OCFS2_FEATURE_RO_COMPAT_USRQUOTA 0x0002 -#define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA 0x0004 - -/* The byte offset of the first backup block will be 1G. - * The following will be 4G, 16G, 64G, 256G and 1T. - */ -#define OCFS2_BACKUP_SB_START 1 << 30 - -/* the max backup superblock nums */ -#define OCFS2_MAX_BACKUP_SUPERBLOCKS 6 - -/* - * Flags on ocfs2_super_block.s_tunefs_flags - */ -#define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001 /* Removing slots */ - -/* - * Flags on ocfs2_dinode.i_flags - */ -#define OCFS2_VALID_FL (0x00000001) /* Inode is valid */ -#define OCFS2_UNUSED2_FL (0x00000002) -#define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */ -#define OCFS2_UNUSED3_FL (0x00000008) -/* System inode flags */ -#define OCFS2_SYSTEM_FL (0x00000010) /* System inode */ -#define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */ -#define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */ -#define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */ -#define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */ -#define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */ -#define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */ -#define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */ -#define OCFS2_QUOTA_FL (0x00001000) /* Quota file */ - -/* - * Flags on ocfs2_dinode.i_dyn_features - * - * These can change much more often than i_flags. When adding flags, - * keep in mind that i_dyn_features is only 16 bits wide. - */ -#define OCFS2_INLINE_DATA_FL (0x0001) /* Data stored in inode block */ -#define OCFS2_HAS_XATTR_FL (0x0002) -#define OCFS2_INLINE_XATTR_FL (0x0004) -#define OCFS2_INDEXED_DIR_FL (0x0008) -#define OCFS2_HAS_REFCOUNT_FL (0x0010) - -/* Inode attributes, keep in sync with EXT2 */ -#define OCFS2_SECRM_FL FS_SECRM_FL /* Secure deletion */ -#define OCFS2_UNRM_FL FS_UNRM_FL /* Undelete */ -#define OCFS2_COMPR_FL FS_COMPR_FL /* Compress file */ -#define OCFS2_SYNC_FL FS_SYNC_FL /* Synchronous updates */ -#define OCFS2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */ -#define OCFS2_APPEND_FL FS_APPEND_FL /* writes to file may only append */ -#define OCFS2_NODUMP_FL FS_NODUMP_FL /* do not dump file */ -#define OCFS2_NOATIME_FL FS_NOATIME_FL /* do not update atime */ -/* Reserved for compression usage... */ -#define OCFS2_DIRTY_FL FS_DIRTY_FL -#define OCFS2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */ -#define OCFS2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */ -#define OCFS2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */ -/* End compression flags --- maybe not all used */ -#define OCFS2_BTREE_FL FS_BTREE_FL /* btree format dir */ -#define OCFS2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */ -#define OCFS2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */ -#define OCFS2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */ -#define OCFS2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */ -#define OCFS2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */ -#define OCFS2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/ -#define OCFS2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */ - -#define OCFS2_FL_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */ -#define OCFS2_FL_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */ - -/* - * Extent record flags (e_node.leaf.flags) - */ -#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but - * unwritten */ -#define OCFS2_EXT_REFCOUNTED (0x02) /* Extent is reference - * counted in an associated - * refcount tree */ - -/* - * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) - */ -#define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */ - -/* - * superblock s_state flags - */ -#define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */ - -/* Limit of space in ocfs2_dir_entry */ -#define OCFS2_MAX_FILENAME_LEN 255 - -/* Maximum slots on an ocfs2 file system */ -#define OCFS2_MAX_SLOTS 255 - -/* Slot map indicator for an empty slot */ -#define OCFS2_INVALID_SLOT -1 - -#define OCFS2_VOL_UUID_LEN 16 -#define OCFS2_MAX_VOL_LABEL_LEN 64 - -/* The cluster stack fields */ -#define OCFS2_STACK_LABEL_LEN 4 -#define OCFS2_CLUSTER_NAME_LEN 16 - -/* Classic (historically speaking) cluster stack */ -#define OCFS2_CLASSIC_CLUSTER_STACK "o2cb" - -/* Journal limits (in bytes) */ -#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) - -/* - * Inline extended attribute size (in bytes) - * The value chosen should be aligned to 16 byte boundaries. - */ -#define OCFS2_MIN_XATTR_INLINE_SIZE 256 - -/* - * Cluster info flags (ocfs2_cluster_info.ci_stackflags) - */ -#define OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT (0x01) - -struct ocfs2_system_inode_info { - char *si_name; - int si_iflags; - int si_mode; -}; - -/* System file index */ -enum { - BAD_BLOCK_SYSTEM_INODE = 0, - GLOBAL_INODE_ALLOC_SYSTEM_INODE, - SLOT_MAP_SYSTEM_INODE, -#define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE - HEARTBEAT_SYSTEM_INODE, - GLOBAL_BITMAP_SYSTEM_INODE, - USER_QUOTA_SYSTEM_INODE, - GROUP_QUOTA_SYSTEM_INODE, -#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_SYSTEM_INODE -#define OCFS2_FIRST_LOCAL_SYSTEM_INODE ORPHAN_DIR_SYSTEM_INODE - ORPHAN_DIR_SYSTEM_INODE, - EXTENT_ALLOC_SYSTEM_INODE, - INODE_ALLOC_SYSTEM_INODE, - JOURNAL_SYSTEM_INODE, - LOCAL_ALLOC_SYSTEM_INODE, - TRUNCATE_LOG_SYSTEM_INODE, - LOCAL_USER_QUOTA_SYSTEM_INODE, - LOCAL_GROUP_QUOTA_SYSTEM_INODE, -#define OCFS2_LAST_LOCAL_SYSTEM_INODE LOCAL_GROUP_QUOTA_SYSTEM_INODE - NUM_SYSTEM_INODES -}; -#define NUM_GLOBAL_SYSTEM_INODES OCFS2_FIRST_LOCAL_SYSTEM_INODE -#define NUM_LOCAL_SYSTEM_INODES \ - (NUM_SYSTEM_INODES - OCFS2_FIRST_LOCAL_SYSTEM_INODE) - -static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = { - /* Global system inodes (single copy) */ - /* The first two are only used from userspace mfks/tunefs */ - [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 }, - [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, - - /* These are used by the running filesystem */ - [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 }, - [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 }, - [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 }, - [USER_QUOTA_SYSTEM_INODE] = { "aquota.user", OCFS2_QUOTA_FL, S_IFREG | 0644 }, - [GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 }, - - /* Slot-specific system inodes (one copy per slot) */ - [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 }, - [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, - [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, - [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 }, - [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 }, - [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 }, - [LOCAL_USER_QUOTA_SYSTEM_INODE] = { "aquota.user:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 }, - [LOCAL_GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 }, -}; - -/* Parameter passed from mount.ocfs2 to module */ -#define OCFS2_HB_NONE "heartbeat=none" -#define OCFS2_HB_LOCAL "heartbeat=local" -#define OCFS2_HB_GLOBAL "heartbeat=global" - -/* - * OCFS2 directory file types. Only the low 3 bits are used. The - * other bits are reserved for now. - */ -#define OCFS2_FT_UNKNOWN 0 -#define OCFS2_FT_REG_FILE 1 -#define OCFS2_FT_DIR 2 -#define OCFS2_FT_CHRDEV 3 -#define OCFS2_FT_BLKDEV 4 -#define OCFS2_FT_FIFO 5 -#define OCFS2_FT_SOCK 6 -#define OCFS2_FT_SYMLINK 7 - -#define OCFS2_FT_MAX 8 - -/* - * OCFS2_DIR_PAD defines the directory entries boundaries - * - * NOTE: It must be a multiple of 4 - */ -#define OCFS2_DIR_PAD 4 -#define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1) -#define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name) -#define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \ - OCFS2_DIR_ROUND) & \ - ~OCFS2_DIR_ROUND) -#define OCFS2_DIR_MIN_REC_LEN OCFS2_DIR_REC_LEN(1) - -#define OCFS2_LINK_MAX 32000 -#define OCFS2_DX_LINK_MAX ((1U << 31) - 1U) -#define OCFS2_LINKS_HI_SHIFT 16 -#define OCFS2_DX_ENTRIES_MAX (0xffffffffU) - -#define S_SHIFT 12 -static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = { - [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE, - [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR, - [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV, - [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV, - [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO, - [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK, - [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK, -}; - - -/* - * Convenience casts - */ -#define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super)) - -/* - * Block checking structure. This is used in metadata to validate the - * contents. If OCFS2_FEATURE_INCOMPAT_META_ECC is not set, it is all - * zeros. - */ -struct ocfs2_block_check { -/*00*/ __le32 bc_crc32e; /* 802.3 Ethernet II CRC32 */ - __le16 bc_ecc; /* Single-error-correction parity vector. - This is a simple Hamming code dependent - on the blocksize. OCFS2's maximum - blocksize, 4K, requires 16 parity bits, - so we fit in __le16. */ - __le16 bc_reserved1; -/*08*/ -}; - -/* - * On disk extent record for OCFS2 - * It describes a range of clusters on disk. - * - * Length fields are divided into interior and leaf node versions. - * This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes. - */ -struct ocfs2_extent_rec { -/*00*/ __le32 e_cpos; /* Offset into the file, in clusters */ - union { - __le32 e_int_clusters; /* Clusters covered by all children */ - struct { - __le16 e_leaf_clusters; /* Clusters covered by this - extent */ - __u8 e_reserved1; - __u8 e_flags; /* Extent flags */ - }; - }; - __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[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 */ - 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*/ __le16 sm_slots[0]; -/* - * 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; -/*10*/ -}; - -/* - * 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*/ struct ocfs2_extended_slot se_slots[0]; -/* - * 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[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*/ __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*/ __le64 i_reserved2[3]; -/*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; - __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)); - -/* - * 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; - __le64 db_free_next; /* Next block in list (unused) */ -/*20*/ __le64 db_blkno; /* Offset on disk, in blocks */ - __le64 db_parent_dinode; /* dinode which owns me, in - blocks */ -/*30*/ 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[0]; /* 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 { - __u8 bg_bitmap[0]; - struct { - /* - * Block groups may be discontiguous when - * OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG is set. - * The extents of a discontigous 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[0]; /* 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[0]; /* 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[0]; /* 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) -{ - 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 suballocator, - uint32_t 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(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; -} - -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); -} -#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 = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; -} - -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 */ - |