--- /dev/null
+/* -*- 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"
+
+/* 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 0
+#define OCFS2_FEATURE_INCOMPAT_SUPP 0
+#define OCFS2_FEATURE_RO_COMPAT_SUPP 0
+
+/*
+ * 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
+
+
+/*
+ * 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 */
+
+/*
+ * 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
+
+/* Journal limits (in bytes) */
+#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
+
+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,
+#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_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,
+ NUM_SYSTEM_INODES
+};
+
+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 },
+
+ /* 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 }
+};
+
+/* Parameter passed from mount.ocfs2 to module */
+#define OCFS2_HB_NONE "heartbeat=none"
+#define OCFS2_HB_LOCAL "heartbeat=local"
+
+/*
+ * 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_LINK_MAX 32000
+
+#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))
+
+/*
+ * On disk extent record for OCFS2
+ * It describes a range of clusters on disk.
+ */
+struct ocfs2_extent_rec {
+/*00*/ __le32 e_cpos; /* Offset into the file, in clusters */
+ __le32 e_clusters; /* Clusters covered by this extent */
+ __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) */
+ __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 */
+ __le64 h_reserved1;
+/*10*/ __le16 h_suballoc_slot; /* Slot suballocator this
+ extent_header belongs to */
+ __le16 h_suballoc_bit; /* Bit offset in suballocator
+ block group */
+ __le32 h_fs_generation; /* Must match super block */
+ __le64 h_blkno; /* Offset on disk, in blocks */
+/*20*/ __le64 h_reserved3;
+ __le64 h_next_leaf_blk; /* Offset on disk, in blocks,
+ of next leaf header pointing
+ to data */
+/*30*/ struct ocfs2_extent_list h_list; /* Extent record list */
+/* Actual on-disk size is one block */
+};
+
+/*
+ * On disk superblock for OCFS2
+ * Note that it is contained inside an ocfs2_dinode, so all offsets
+ * are relative to the start of ocfs2_dinode.id2.
+ */
+struct ocfs2_super_block {
+/*00*/ __le16 s_major_rev_level;
+ __le16 s_minor_rev_level;
+ __le16 s_mnt_count;
+ __le16 s_max_mnt_count;
+ __le16 s_state; /* File system state */
+ __le16 s_errors; /* Behaviour when detecting errors */
+ __le32 s_checkinterval; /* Max time between checks */
+/*10*/ __le64 s_lastcheck; /* Time of last check */
+ __le32 s_creator_os; /* OS */
+ __le32 s_feature_compat; /* Compatible feature set */
+/*20*/ __le32 s_feature_incompat; /* Incompatible feature set */
+ __le32 s_feature_ro_compat; /* Readonly-compatible feature set */
+ __le64 s_root_blkno; /* Offset, in blocks, of root directory
+ dinode */
+/*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system
+ directory dinode */
+ __le32 s_blocksize_bits; /* Blocksize for this fs */
+ __le32 s_clustersize_bits; /* Clustersize for this fs */
+/*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
+ before tunefs required */
+ __le16 s_reserved1;
+ __le32 s_reserved2;
+ __le64 s_first_cluster_group; /* Block offset of 1st cluster
+ * group header */
+/*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
+/*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
+/*A0*/
+};
+
+/*
+ * Local allocation bitmap for OCFS2 slots
+ * Note that it exists inside an ocfs2_dinode, so all offsets are
+ * relative to the start of ocfs2_dinode.id2.
+ */
+struct ocfs2_local_alloc
+{
+/*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */
+ __le16 la_size; /* Size of included bitmap, in bytes */
+ __le16 la_reserved1;
+ __le64 la_reserved2;
+/*10*/ __u8 la_bitmap[0];
+};
+
+/*
+ * On disk inode for OCFS2
+ */
+struct ocfs2_dinode {
+/*00*/ __u8 i_signature[8]; /* Signature for validation */
+ __le32 i_generation; /* Generation number */
+ __le16 i_suballoc_slot; /* Slot suballocator this inode
+ belongs to */
+ __le16 i_suballoc_bit; /* Bit offset in suballocator
+ block group */
+/*10*/ __le32 i_reserved0;
+ __le32 i_clusters; /* Cluster count */
+ __le32 i_uid; /* Owner UID */
+ __le32 i_gid; /* Owning GID */
+/*20*/ __le64 i_size; /* Size in bytes */
+ __le16 i_mode; /* File mode */
+ __le16 i_links_count; /* Links count */
+ __le32 i_flags; /* File flags */
+/*30*/ __le64 i_atime; /* Access time */
+ __le64 i_ctime; /* Creation time */
+/*40*/ __le64 i_mtime; /* Modification time */
+ __le64 i_dtime; /* Deletion time */
+/*50*/ __le64 i_blkno; /* Offset on disk, in blocks */
+ __le64 i_last_eb_blk; /* Pointer to last extent
+ block */
+/*60*/ __le32 i_fs_generation; /* Generation per fs-instance */
+ __le32 i_atime_nsec;
+ __le32 i_ctime_nsec;
+ __le32 i_mtime_nsec;
+/*70*/ __le64 i_reserved1[9];
+/*B8*/ union {
+ __le64 i_pad1; /* Generic way to refer to this
+ 64bit union */
+ struct {
+ __le64 i_rdev; /* Device number */
+ } dev1;
+ struct { /* Info for bitmap system
+ inodes */
+ __le32 i_used; /* Bits (ie, clusters) used */
+ __le32 i_total; /* Total bits (clusters)
+ available */
+ } bitmap1;
+ struct { /* Info for journal system
+ inodes */
+ __le32 ij_flags; /* Mounted, version, etc. */
+ __le32 ij_pad;
+ } journal1;
+ } id1; /* Inode type dependant 1 */
+/*C0*/ union {
+ struct ocfs2_super_block i_super;
+ struct ocfs2_local_alloc i_lab;
+ struct ocfs2_chain_list i_chain;
+ struct ocfs2_extent_list i_list;
+ struct ocfs2_truncate_log i_dealloc;
+ __u8 i_symlink[0];
+ } id2;
+/* Actual on-disk size is one block */
+};
+
+/*
+ * On-disk directory entry structure for OCFS2
+ *
+ * Packed as this structure could be accessed unaligned on 64-bit platforms
+ */
+struct ocfs2_dir_entry {
+/*00*/ __le64 inode; /* Inode number */
+ __le16 rec_len; /* Directory entry length */
+ __u8 name_len; /* Name length */
+ __u8 file_type;
+/*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */
+/* Actual on-disk length specified by rec_len */
+} __attribute__ ((packed));
+
+/*
+ * On disk allocator group structure for OCFS2
+ */
+struct ocfs2_group_desc
+{
+/*00*/ __u8 bg_signature[8]; /* Signature for validation */
+ __le16 bg_size; /* Size of included bitmap in
+ bytes. */
+ __le16 bg_bits; /* Bits represented by this
+ group. */
+ __le16 bg_free_bits_count; /* Free bits count */
+ __le16 bg_chain; /* What chain I am in. */
+/*10*/ __le32 bg_generation;
+ __le32 bg_reserved1;
+ __le64 bg_next_group; /* Next group in my list, in
+ blocks */
+/*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in
+ blocks */
+ __le64 bg_blkno; /* Offset on disk, in blocks */
+/*30*/ __le64 bg_reserved2[2];
+/*40*/ __u8 bg_bitmap[0];
+};
+
+#ifdef __KERNEL__
+static inline int ocfs2_fast_symlink_chars(struct super_block *sb)
+{
+ return sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_symlink);
+}
+
+static inline int ocfs2_extent_recs_per_inode(struct super_block *sb)
+{
+ int size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
+
+ return size / sizeof(struct ocfs2_extent_rec);
+}
+
+static inline int ocfs2_chain_recs_per_inode(struct super_block *sb)
+{
+ int size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
+
+ return size / sizeof(struct ocfs2_chain_rec);
+}
+
+static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb)
+{
+ int size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_extent_block, h_list.l_recs);
+
+ return size / sizeof(struct ocfs2_extent_rec);
+}
+
+static inline u16 ocfs2_local_alloc_size(struct super_block *sb)
+{
+ u16 size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
+
+ return size;
+}
+
+static inline int ocfs2_group_bitmap_size(struct super_block *sb)
+{
+ int size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_group_desc, bg_bitmap);
+
+ return size;
+}
+
+static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb)
+{
+ int size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
+
+ return size / sizeof(struct ocfs2_truncate_rec);
+}
+#else
+static inline int ocfs2_fast_symlink_chars(int blocksize)
+{
+ return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink);
+}
+
+static inline int ocfs2_extent_recs_per_inode(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
+
+ return size / sizeof(struct ocfs2_extent_rec);
+}
+
+static inline int ocfs2_chain_recs_per_inode(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
+
+ return size / sizeof(struct ocfs2_chain_rec);
+}
+
+static inline int ocfs2_extent_recs_per_eb(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_extent_block, h_list.l_recs);
+
+ return size / sizeof(struct ocfs2_extent_rec);
+}
+
+static inline int ocfs2_local_alloc_size(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
+
+ return size;
+}
+
+static inline int ocfs2_group_bitmap_size(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_group_desc, bg_bitmap);
+
+ return size;
+}
+
+static inline int ocfs2_truncate_recs_per_inode(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
+
+ return size / sizeof(struct ocfs2_truncate_rec);
+}
+#endif /* __KERNEL__ */
+
+
+static inline int ocfs2_system_inode_is_global(int type)
+{
+ return ((type >= 0) &&
+ (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE));
+}
+
+static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
+ int type, int slot)
+{
+ int chars;
+
+ /*
+ * Global system inodes can only have one copy. Everything
+ * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode
+ * list has a copy per slot.
+ */
+ if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
+ chars = snprintf(buf, len,
+ ocfs2_system_inodes[type].si_name);
+ else
+ chars = snprintf(buf, len,
+ ocfs2_system_inodes[type].si_name,
+ slot);
+
+ return chars;
+}
+
+static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
+ umode_t mode)
+{
+ de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+}
+
+#endif /* _OCFS2_FS_H */
+
git://git.onelab.eu / linux-2.6.git / blobdiff