* vim: noexpandtab sw=8 ts=8 sts=0:
*
* ocfs2_fs.h
*
* On-disk structures for OCFS2.
*
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
*/
#ifndef _OCFS2_FS_H
#define _OCFS2_FS_H
#include <linux/magic.h>
#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
#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"
#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 \
| OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
#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
#define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008
#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
#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
#define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100
#define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200
#define OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS 0x0400
#define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800
#define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000
#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
* Append Direct IO support
*/
#define OCFS2_FEATURE_INCOMPAT_APPEND_DIO 0x8000
* 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 following will be 4G, 16G, 64G, 256G and 1T.
*/
#define OCFS2_BACKUP_SB_START 1 << 30
#define OCFS2_MAX_BACKUP_SUPERBLOCKS 6
* Flags on ocfs2_super_block.s_tunefs_flags
*/
#define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001
* Flags on ocfs2_dinode.i_flags
*/
#define OCFS2_VALID_FL (0x00000001)
#define OCFS2_UNUSED2_FL (0x00000002)
#define OCFS2_ORPHANED_FL (0x00000004)
#define OCFS2_UNUSED3_FL (0x00000008)
#define OCFS2_SYSTEM_FL (0x00000010)
#define OCFS2_SUPER_BLOCK_FL (0x00000020)
#define OCFS2_LOCAL_ALLOC_FL (0x00000040)
#define OCFS2_BITMAP_FL (0x00000080)
#define OCFS2_JOURNAL_FL (0x00000100)
#define OCFS2_HEARTBEAT_FL (0x00000200)
#define OCFS2_CHAIN_FL (0x00000400)
#define OCFS2_DEALLOC_FL (0x00000800)
#define OCFS2_QUOTA_FL (0x00001000)
#define OCFS2_DIO_ORPHANED_FL (0X00002000)
* for dio */
* 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)
#define OCFS2_HAS_XATTR_FL (0x0002)
#define OCFS2_INLINE_XATTR_FL (0x0004)
#define OCFS2_INDEXED_DIR_FL (0x0008)
#define OCFS2_HAS_REFCOUNT_FL (0x0010)
#define OCFS2_SECRM_FL FS_SECRM_FL
#define OCFS2_UNRM_FL FS_UNRM_FL
#define OCFS2_COMPR_FL FS_COMPR_FL
#define OCFS2_SYNC_FL FS_SYNC_FL
#define OCFS2_IMMUTABLE_FL FS_IMMUTABLE_FL
#define OCFS2_APPEND_FL FS_APPEND_FL
#define OCFS2_NODUMP_FL FS_NODUMP_FL
#define OCFS2_NOATIME_FL FS_NOATIME_FL
#define OCFS2_DIRTY_FL FS_DIRTY_FL
#define OCFS2_COMPRBLK_FL FS_COMPRBLK_FL
#define OCFS2_NOCOMP_FL FS_NOCOMP_FL
#define OCFS2_ECOMPR_FL FS_ECOMPR_FL
#define OCFS2_BTREE_FL FS_BTREE_FL
#define OCFS2_INDEX_FL FS_INDEX_FL
#define OCFS2_IMAGIC_FL FS_IMAGIC_FL
#define OCFS2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL
#define OCFS2_NOTAIL_FL FS_NOTAIL_FL
#define OCFS2_DIRSYNC_FL FS_DIRSYNC_FL
#define OCFS2_TOPDIR_FL FS_TOPDIR_FL
#define OCFS2_RESERVED_FL FS_RESERVED_FL
#define OCFS2_FL_VISIBLE FS_FL_USER_VISIBLE
#define OCFS2_FL_MODIFIABLE FS_FL_USER_MODIFIABLE
* Extent record flags (e_node.leaf.flags)
*/
#define OCFS2_EXT_UNWRITTEN (0x01)
* unwritten */
#define OCFS2_EXT_REFCOUNTED (0x02)
* counted in an associated
* refcount tree */
* Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
*/
#define OCFS2_JOURNAL_DIRTY_FL (0x00000001)
* superblock s_state flags
*/
#define OCFS2_ERROR_FS (0x00000001)
#define OCFS2_MAX_FILENAME_LEN 255
#define OCFS2_MAX_SLOTS 255
#define OCFS2_INVALID_SLOT ((u16)-1)
#define OCFS2_VOL_UUID_LEN 16
#define OCFS2_MAX_VOL_LABEL_LEN 64
#define OCFS2_STACK_LABEL_LEN 4
#define OCFS2_CLUSTER_NAME_LEN 16
#define OCFS2_CLASSIC_CLUSTER_STACK "o2cb"
#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;
};
enum {
BAD_BLOCK_SYSTEM_INODE = 0,
GLOBAL_INODE_ALLOC_SYSTEM_INODE,
#define OCFS2_FIRST_ONLINE_SYSTEM_INODE GLOBAL_INODE_ALLOC_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] = {
[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 },
[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 },
[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 },
};
#define OCFS2_HB_NONE "heartbeat=none"
#define OCFS2_HB_LOCAL "heartbeat=local"
#define OCFS2_HB_GLOBAL "heartbeat=global"
* 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)
* 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 {
__le32 bc_crc32e;
__le16 bc_ecc;
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;
};
* 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 {
__le32 e_cpos;
union {
__le32 e_int_clusters;
struct {
__le16 e_leaf_clusters;
extent */
__u8 e_reserved1;
__u8 e_flags;
};
};
__le64 e_blkno;
};
struct ocfs2_chain_rec {
__le32 c_free;
__le32 c_total;
__le64 c_blkno;
};
struct ocfs2_truncate_rec {
__le32 t_start;
__le32 t_clusters;
};
* 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 {
__le16 l_tree_depth;
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;
__le16 l_next_free_rec;
__le16 l_reserved1;
__le64 l_reserved2;
sizeof(ocfs2_extent_rec) */
struct ocfs2_extent_rec l_recs[];
};
* 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 {
__le16 cl_cpg;
__le16 cl_bpc;
__le16 cl_count;
__le16 cl_next_free_rec;
__le64 cl_reserved1;
struct ocfs2_chain_rec cl_recs[];
};
* 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 {
__le16 tl_count;
__le16 tl_used;
__le32 tl_reserved1;
struct ocfs2_truncate_rec tl_recs[];
};
* On disk extent block (indirect block) for OCFS2
*/
struct ocfs2_extent_block
{
__u8 h_signature[8];
struct ocfs2_block_check h_check;
__le16 h_suballoc_slot;
extent_header belongs to */
__le16 h_suballoc_bit;
block group */
__le32 h_fs_generation;
__le64 h_blkno;
__le64 h_suballoc_loc;
eb belongs to. Only valid
if allocated from a
discontiguous block group */
__le64 h_next_leaf_blk;
of next leaf header pointing
to data */
struct ocfs2_extent_list h_list;
};
* 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 {
__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 {
__u8 es_valid;
__u8 es_reserved1[3];
__le32 es_node_num;
};
* 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 {
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 {
__u8 ci_stack[OCFS2_STACK_LABEL_LEN];
union {
__le32 ci_reserved;
struct {
__u8 ci_stackflags;
__u8 ci_reserved1;
__u8 ci_reserved2;
__u8 ci_reserved3;
};
};
__u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN];
};
* 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 {
__le16 s_major_rev_level;
__le16 s_minor_rev_level;
__le16 s_mnt_count;
__le16 s_max_mnt_count;
__le16 s_state;
__le16 s_errors;
__le32 s_checkinterval;
__le64 s_lastcheck;
__le32 s_creator_os;
__le32 s_feature_compat;
__le32 s_feature_incompat;
__le32 s_feature_ro_compat;
__le64 s_root_blkno;
dinode */
__le64 s_system_dir_blkno;
directory dinode */
__le32 s_blocksize_bits;
__le32 s_clustersize_bits;
__le16 s_max_slots;
before tunefs required */
__le16 s_tunefs_flag;
__le32 s_uuid_hash;
__le64 s_first_cluster_group;
* group header */
__u8 s_label[OCFS2_MAX_VOL_LABEL_LEN];
__u8 s_uuid[OCFS2_VOL_UUID_LEN];
struct ocfs2_cluster_info s_cluster_info;
userspace or clusterinfo
INCOMPAT flag set. */
__le16 s_xattr_inline_size;
for this fs*/
__le16 s_reserved0;
__le32 s_dx_seed[3];
* s_uuid_hash serves as seed[3]. */
__le64 s_reserved2[15];
* 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
{
__le32 la_bm_off;
__le16 la_size;
__le16 la_reserved1;
__le64 la_reserved2;
__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
{
__le16 id_count;
* for data, starting at id_data */
__le16 id_reserved0;
__le32 id_reserved1;
__u8 id_data[];
};
* On disk inode for OCFS2
*/
struct ocfs2_dinode {
__u8 i_signature[8];
__le32 i_generation;
__le16 i_suballoc_slot;
belongs to */
__le16 i_suballoc_bit;
block group */
__le16 i_links_count_hi;
__le16 i_xattr_inline_size;
__le32 i_clusters;
__le32 i_uid;
__le32 i_gid;
__le64 i_size;
__le16 i_mode;
__le16 i_links_count;
__le32 i_flags;
__le64 i_atime;
__le64 i_ctime;
__le64 i_mtime;
__le64 i_dtime;
__le64 i_blkno;
__le64 i_last_eb_blk;
block */
__le32 i_fs_generation;
__le32 i_atime_nsec;
__le32 i_ctime_nsec;
__le32 i_mtime_nsec;
__le32 i_attr;
__le16 i_orphaned_slot;
was set in i_flags */
__le16 i_dyn_features;
__le64 i_xattr_loc;
struct ocfs2_block_check i_check;
__le64 i_dx_root;
__le64 i_refcount_loc;
__le64 i_suballoc_loc;
inode belongs to. Only valid
if allocated from a
discontiguous block group */
__le16 i_dio_orphaned_slot;
__le16 i_reserved1[3];
__le64 i_reserved2[2];
union {
__le64 i_pad1;
64bit union */
struct {
__le64 i_rdev;
} dev1;
struct {
inodes */
__le32 i_used;
__le32 i_total;
available */
} bitmap1;
struct {
inodes */
__le32 ij_flags;
__le32 ij_recovery_generation;
journal is recovered
after an unclean
shutdown */
} journal1;
} id1;
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;
};
* On-disk directory entry structure for OCFS2
*
* Packed as this structure could be accessed unaligned on 64-bit platforms
*/
struct ocfs2_dir_entry {
__le64 inode;
__le16 rec_len;
__u8 name_len;
__u8 file_type;
char name[OCFS2_MAX_FILENAME_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 {
__le64 db_compat_inode;
__le16 db_compat_rec_len;
* ocfs2_dir_entry. */
__u8 db_compat_name_len;
__u8 db_reserved0;
__le16 db_reserved1;
__le16 db_free_rec_len;
* in this block. (unused) */
__u8 db_signature[8];
__le64 db_reserved2;
__le64 db_free_next;
__le64 db_blkno;
__le64 db_parent_dinode;
blocks */
struct ocfs2_block_check db_check;
};
* 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;
* cluster in index */
__le32 dx_minor_hash;
* block in cluster */
__le64 dx_dirent_blk;
* tree holding this dirent. */
};
struct ocfs2_dx_entry_list {
__le32 de_reserved;
__le16 de_count;
* possible in de_entries */
__le16 de_num_used;
* de_entries entries */
struct ocfs2_dx_entry de_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];
struct ocfs2_block_check dr_check;
__le16 dr_suballoc_slot;
* block belongs to. */
__le16 dr_suballoc_bit;
* block group */
__le32 dr_fs_generation;
__le64 dr_blkno;
__le64 dr_last_eb_blk;
* extent block */
__le32 dr_clusters;
* to the indexed tree. */
__u8 dr_flags;
__u8 dr_reserved0;
__le16 dr_reserved1;
__le64 dr_dir_blkno;
__le32 dr_num_entries;
* names stored in
* this directory.*/
__le32 dr_reserved2;
__le64 dr_free_blk;
* unindexed block list. */
__le64 dr_suballoc_loc;
this root belongs to.
Only valid if allocated
from a discontiguous
block group */
__le64 dr_reserved3[14];
union {
struct ocfs2_extent_list dr_list;
* bits for maximum space
* efficiency. */
struct ocfs2_dx_entry_list dr_entries;
* 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];
struct ocfs2_block_check dl_check;
__le64 dl_blkno;
__le32 dl_fs_generation;
__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
{
__u8 bg_signature[8];
__le16 bg_size;
bytes. */
__le16 bg_bits;
group. */
__le16 bg_free_bits_count;
__le16 bg_chain;
__le32 bg_generation;
__le32 bg_reserved1;
__le64 bg_next_group;
blocks */
__le64 bg_parent_dinode;
blocks */
__le64 bg_blkno;
struct ocfs2_block_check bg_check;
__le64 bg_reserved2;
union {
__u8 bg_bitmap[0];
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];
struct ocfs2_extent_list bg_list;
};
};
};
struct ocfs2_refcount_rec {
__le64 r_cpos;
__le32 r_clusters;
__le32 r_refcount;
};
#define OCFS2_32BIT_POS_MASK (0xffffffffULL)
#define OCFS2_REFCOUNT_LEAF_FL (0x00000001)
#define OCFS2_REFCOUNT_TREE_FL (0x00000002)
struct ocfs2_refcount_list {
__le16 rl_count;
in rl_records */
__le16 rl_used;
__le32 rl_reserved2;
__le64 rl_reserved1;
struct ocfs2_refcount_rec rl_recs[];
};
struct ocfs2_refcount_block {
__u8 rf_signature[8];
__le16 rf_suballoc_slot;
belongs to */
__le16 rf_suballoc_bit;
block group */
__le32 rf_fs_generation;
__le64 rf_blkno;
__le64 rf_parent;
OCFS2_REFCOUNT_LEAF_FL is set in
rf_flags */
struct ocfs2_block_check rf_check;
__le64 rf_last_eb_blk;
__le32 rf_count;
refcount tree */
__le32 rf_flags;
__le32 rf_clusters;
__le32 rf_cpos;
__le32 rf_generation;
* for the same refcount tree. */
__le32 rf_reserved0;
__le64 rf_suballoc_loc;
refcount block belongs to. Only
valid if allocated from a
discontiguous block group */
__le64 rf_reserved1[6];
union {
struct ocfs2_refcount_list rf_records;
records */
struct ocfs2_extent_list rf_list;
only valid if
OCFS2_REFCOUNT_TREE_FL
is set in rf_flags */
};
};
* 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;
__le16 xe_name_offset;
local xattr storage(inode, xattr block or
xattr bucket). */
__u8 xe_name_len;
__u8 xe_type;
* type and the highest bit indicates whether
* the EA is stored in the local storage. */
__le64 xe_value_size;
};
* 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;
many records are in the
local xattr storage. */
__le16 xh_free_start;
xattr. */
__le16 xh_name_value_len;
length in this bucket. */
__le16 xh_num_buckets;
in this extent record,
only valid in the first
bucket. */
struct ocfs2_block_check xh_check;
(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[];
};
* 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 {
__le32 xr_clusters;
__le32 xr_reserved0;
__le64 xr_last_eb_blk;
struct ocfs2_extent_list xr_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 {
__le32 xt_clusters;
__le32 xt_reserved0;
__le64 xt_last_eb_blk;
struct ocfs2_extent_list xt_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 {
__u8 xb_signature[8];
__le16 xb_suballoc_slot;
block belongs to. */
__le16 xb_suballoc_bit;
block group */
__le32 xb_fs_generation;
__le64 xb_blkno;
struct ocfs2_block_check xb_check;
__le16 xb_flags;
real xattr or a xattr tree. */
__le16 xb_reserved0;
__le32 xb_reserved1;
__le64 xb_suballoc_loc;
xattr block belongs to. Only
valid if allocated from a
discontiguous block group */
union {
struct ocfs2_xattr_header xb_header;
block contains xattr */
struct ocfs2_xattr_tree_root xb_root;
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
*/
#define OCFS2_GLOBAL_QMAGICS {\
0x0cf52470, \
0x0cf52471 \
}
#define OCFS2_GLOBAL_QVERSIONS {\
0, \
0, \
}
* for OCFS2 internal use at its end. OCFS2 can use it for things like
* checksums, etc. */
#define OCFS2_QBLK_RESERVED_SPACE 8
struct ocfs2_disk_dqheader {
__le32 dqh_magic;
__le32 dqh_version;
};
#define OCFS2_GLOBAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader))
* header) */
struct ocfs2_global_disk_dqinfo {
__le32 dqi_bgrace;
__le32 dqi_igrace;
__le32 dqi_syncms;
* global quota file */
__le32 dqi_blocks;
__le32 dqi_free_blk;
__le32 dqi_free_entry;
* file */
};
* for future use. */
struct ocfs2_global_disk_dqblk {
__le32 dqb_id;
__le32 dqb_use_count;
__le64 dqb_ihardlimit;
__le64 dqb_isoftlimit;
__le64 dqb_curinodes;
__le64 dqb_bhardlimit;
__le64 dqb_bsoftlimit;
__le64 dqb_curspace;
__le64 dqb_btime;
__le64 dqb_itime;
__le64 dqb_pad1;
__le64 dqb_pad2;
};
* On-disk structures for local quota file
*/
#define OCFS2_LOCAL_QMAGICS {\
0x0cf524c0, \
0x0cf524c1 \
}
#define OCFS2_LOCAL_QVERSIONS {\
0, \
0, \
}
#define OLQF_CLEAN 0x0001
* quota has been cleanly turned off) */
#define OCFS2_LOCAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader))
* header) */
struct ocfs2_local_disk_dqinfo {
__le32 dqi_flags;
__le32 dqi_chunks;
* with a bitmap */
__le32 dqi_blocks;
};
struct ocfs2_local_disk_chunk {
__le32 dqc_free;
__u8 dqc_bitmap[];
* chunk of quota file */
};
struct ocfs2_local_disk_dqblk {
__le64 dqb_id;
__le64 dqb_spacemod;
__le64 dqb_inodemod;
};
* The quota trailer lives at the end of each quota block.
*/
struct ocfs2_disk_dqtrailer {
struct ocfs2_block_check dq_check;
};
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
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