#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"
/* Compatibility flags */
#define OCFS2_HAS_COMPAT_FEATURE(sb,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
+#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)
+#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
*/
#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
+
+/* Metadata checksum and error correction */
+#define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800
+
+/*
+ * 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_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)
+
+/* 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 */
+
+/*
+ * Extent record flags (e_node.leaf.flags)
+ */
+#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but
+ * unwritten */
+
+/*
+ * ioctl commands
+ */
+#define OCFS2_IOC_GETFLAGS _IOR('f', 1, long)
+#define OCFS2_IOC_SETFLAGS _IOW('f', 2, long)
+#define OCFS2_IOC32_GETFLAGS _IOR('f', 1, int)
+#define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int)
+
+/*
+ * Space reservation / allocation / free ioctls and argument structure
+ * are designed to be compatible with XFS.
+ *
+ * ALLOCSP* and FREESP* are not and will never be supported, but are
+ * included here for completeness.
+ */
+struct ocfs2_space_resv {
+ __s16 l_type;
+ __s16 l_whence;
+ __s64 l_start;
+ __s64 l_len; /* len == 0 means until end of file */
+ __s32 l_sysid;
+ __u32 l_pid;
+ __s32 l_pad[4]; /* reserve area */
+};
+
+#define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
+#define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
+
+/* Used to pass group descriptor data when online resize is done */
+struct ocfs2_new_group_input {
+ __u64 group; /* Group descriptor's blkno. */
+ __u32 clusters; /* Total number of clusters in this group */
+ __u32 frees; /* Total free clusters in this group */
+ __u16 chain; /* Chain for this group */
+ __u16 reserved1;
+ __u32 reserved2;
+};
+
+#define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int)
+#define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input)
+#define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input)
/*
* Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
#define OCFS2_VOL_UUID_LEN 16
#define OCFS2_MAX_VOL_LABEL_LEN 64
+/* The alternate, userspace stack fields */
+#define OCFS2_STACK_LABEL_LEN 4
+#define OCFS2_CLUSTER_NAME_LEN 16
+
/* Journal limits (in bytes) */
#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
+/*
+ * Default local alloc size (in megabytes)
+ *
+ * The value chosen should be such that most allocations, including new
+ * block groups, use local alloc.
+ */
+#define OCFS2_DEFAULT_LOCAL_ALLOC_SIZE 8
+
+/*
+ * Inline extended attribute size (in bytes)
+ * The value chosen should be aligned to 16 byte boundaries.
+ */
+#define OCFS2_MIN_XATTR_INLINE_SIZE 256
+
struct ocfs2_system_inode_info {
char *si_name;
int si_iflags;
#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
+ USER_QUOTA_SYSTEM_INODE,
+ GROUP_QUOTA_SYSTEM_INODE,
+#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_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,
NUM_SYSTEM_INODES
};
[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 },
[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 }
+ [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_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 dependant
+ 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 */
- __le32 e_clusters; /* Clusters covered by this extent */
+ 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*/
};
/*00*/ __le16 l_tree_depth; /* Extent tree depth from this
point. 0 means data extents
hang directly off this
- header (a leaf) */
+ 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;
struct ocfs2_extent_block
{
/*00*/ __u8 h_signature[8]; /* Signature for verification */
- __le64 h_reserved1;
+ 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
};
/*
+ * 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)
+ */
+};
+
+struct ocfs2_cluster_info {
+/*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN];
+ __le32 ci_reserved;
+/*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.
__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;
+ __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*/
+/*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace
+ stack. Only valid
+ with INCOMPAT flag. */
+/*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size
+ for this fs*/
+ __le16 s_reserved0;
+ __le32 s_reserved1;
+/*C0*/ __le64 s_reserved2[16]; /* 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.
+ */
};
/*
};
/*
+ * 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 {
belongs to */
__le16 i_suballoc_bit; /* Bit offset in suballocator
block group */
-/*10*/ __le32 i_reserved0;
+/*10*/ __le16 i_reserved0;
+ __le16 i_xattr_inline_size;
__le32 i_clusters; /* Cluster count */
__le32 i_uid; /* Owner UID */
__le32 i_gid; /* Owning GID */
__le32 i_atime_nsec;
__le32 i_ctime_nsec;
__le32 i_mtime_nsec;
-/*70*/ __le64 i_reserved1[9];
+/*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_reserved2[6];
/*B8*/ union {
__le64 i_pad1; /* Generic way to refer to this
64bit union */
struct { /* Info for journal system
inodes */
__le32 ij_flags; /* Mounted, version, etc. */
- __le32 ij_pad;
+ __le32 ij_recovery_generation; /* Incremented when the
+ journal is recovered
+ after an unclean
+ shutdown */
} journal1;
} id1; /* Inode type dependant 1 */
/*C0*/ union {
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 */
} __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*/
+};
+
+/*
* On disk allocator group structure for OCFS2
*/
struct ocfs2_group_desc
/*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in
blocks */
__le64 bg_blkno; /* Offset on disk, in blocks */
-/*30*/ __le64 bg_reserved2[2];
+/*30*/ struct ocfs2_block_check bg_check; /* Error checking */
+ __le64 bg_reserved2;
/*40*/ __u8 bg_bitmap[0];
};
+/*
+ * 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, does'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_reserved2;
+/*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)
{
offsetof(struct ocfs2_dinode, id2.i_symlink);
}
+static inline int ocfs2_max_inline_data(struct super_block *sb)
+{
+ return sb->s_blocksize -
+ offsetof(struct ocfs2_dinode, id2.i_data.id_data);
+}
+
+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;
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_chain_recs_per_inode(struct super_block *sb)
{
int size;
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);
+}
#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(int blocksize)
+{
+ return blocksize - offsetof(struct ocfs2_dinode, id2.i_data.id_data);
+}
+
static inline int ocfs2_extent_recs_per_inode(int blocksize)
{
int size;
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__ */
* list has a copy per slot.
*/
if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
- chars = snprintf(buf, len,
+ chars = snprintf(buf, len, "%s",
ocfs2_system_inodes[type].si_name);
else
chars = snprintf(buf, len,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff