| /* -*- 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 OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT |
| #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 |
| |
| |
| /* Used to denote a non-clustered volume */ |
| #define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008 |
| |
| /* |
| * 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 */ |
| |
| /* Inode attributes, keep in sync with EXT2 */ |
| #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */ |
| #define OCFS2_UNRM_FL (0x00000002) /* Undelete */ |
| #define OCFS2_COMPR_FL (0x00000004) /* Compress file */ |
| #define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */ |
| #define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */ |
| #define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */ |
| #define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */ |
| #define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */ |
| #define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */ |
| |
| #define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */ |
| #define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */ |
| |
| /* |
| * ioctl commands |
| */ |
| #define OCFS2_IOC_GETFLAGS _IOR('f', 1, long) |
| #define OCFS2_IOC_SETFLAGS _IOW('f', 2, long) |
| |
| /* |
| * 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; |
| __le32 i_attr; |
| __le32 i_reserved1; |
| /*70*/ __le64 i_reserved2[8]; |
| /*B8*/ union { |
| __le64 i_pad1; /* Generic way to refer to this |
| 64bit union */ |
| struct { |
| __le64 i_rdev; /* Device number */ |
| } dev1; |
| struct { /* Info for bitmap system |
| inodes */ |
| __le32 i_used; /* Bits (ie, clusters) used */ |
| __le32 i_total; /* Total bits (clusters) |
| available */ |
| } bitmap1; |
| struct { /* Info for journal system |
| inodes */ |
| __le32 ij_flags; /* Mounted, version, etc. */ |
| __le32 ij_pad; |
| } journal1; |
| } id1; /* Inode type dependant 1 */ |
| /*C0*/ union { |
| struct ocfs2_super_block i_super; |
| struct ocfs2_local_alloc i_lab; |
| struct ocfs2_chain_list i_chain; |
| struct ocfs2_extent_list i_list; |
| struct ocfs2_truncate_log i_dealloc; |
| __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 */ |
| |