1 /* SPDX-License-Identifier: GPL-2.0-only */
5  * On-disk structures for OCFS2.
59 	( OCFS2_SB(sb)->s_feature_compat & (mask) )
61 	( OCFS2_SB(sb)->s_feature_ro_compat & (mask) )
63 	( OCFS2_SB(sb)->s_feature_incompat & (mask) )
65 	OCFS2_SB(sb)->s_feature_compat |= (mask)
67 	OCFS2_SB(sb)->s_feature_ro_compat |= (mask)
69 	OCFS2_SB(sb)->s_feature_incompat |= (mask)
71 	OCFS2_SB(sb)->s_feature_compat &= ~(mask)
73 	OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask)
75 	OCFS2_SB(sb)->s_feature_incompat &= ~(mask)
96  * Heartbeat-only devices are missing journals and other files.  The
105  * after an aborted run without fsck-ing.
109 /* Used to denote a non-clustered volume */
112 /* Support for sparse allocation in b-trees */
119  * fsck-ing.
177  * The filesystem will correctly handle journal feature bits.
230  * keep in mind that i_dyn_features is only 16 bits wide.
252 /* End compression flags --- maybe not all used */
254 #define OCFS2_INDEX_FL			FS_INDEX_FL	/* hash-indexed directory */
291 #define OCFS2_INVALID_SLOT		((u16)-1)
323 /* System file index */
348 		(NUM_SYSTEM_INODES - OCFS2_FIRST_LOCAL_SYSTEM_INODE)
361 	[GROUP_QUOTA_SYSTEM_INODE]		= { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 },
363 	/* Slot-specific system inodes (one copy per slot) */
371 	[LOCAL_GROUP_QUOTA_SYSTEM_INODE]	= { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
385 #define OCFS2_DIR_ROUND			(OCFS2_DIR_PAD - 1)
393 #define	OCFS2_DX_LINK_MAX	((1U << 31) - 1U)
401 #define OCFS2_RAW_SB(dinode)		(&((dinode)->id2.i_super))
410 	__le16 bc_ecc;		/* Single-error-correction parity vector.
413 				   blocksize, 4K, requires 16 parity bits,
442 	__le32 c_free;	/* Number of free bits in this chain. */
443 	__le32 c_total;	/* Number of total bits in this chain */
444 	__le64 c_blkno;	/* Physical disk offset (blocks) of 1st group */
463 					   NOTE: The high 8 bits cannot be
464 					   used - tree_depth is never that big.
480 /*00*/	__le16 cl_cpg;			/* Clusters per Block Group */
481 	__le16 cl_bpc;			/* Bits per cluster */
510 					   block group */
513 /*20*/	__le64 h_suballoc_loc;		/* Suballocator block group this
516 					   discontiguous block group */
521 /* Actual on-disk size is one block */
527  * value -1 (0xFFFF) is OCFS2_INVALID_SLOT.  This marks a slot empty.
532  * Actual on-disk size is one block.  OCFS2_MAX_SLOTS is 255,
594 	__le32 s_feature_ro_compat;	/* Readonly-compatible feature set */
606 					 * group header */
608 /*90*/	__u8  s_uuid[OCFS2_VOL_UUID_LEN];	/* 128-bit uuid */
615 	__le32 s_dx_seed[3];		/* seed[0-2] for dx dir hash.
645  * Data-in-inode header. This is only used if i_dyn_features has
666 					   block group */
667 /*10*/	__le16 i_links_count_hi;	/* High 16 bits of links count */
683 /*60*/	__le32 i_fs_generation;		/* Generation per fs-instance */
693 /*88*/	__le64 i_dx_root;		/* Pointer to dir index root block */
695 	__le64 i_suballoc_loc;		/* Suballocator block group this
698 					   discontiguous block group */
710 			__le32 i_used;	/* Bits (ie, clusters) used  */
711 			__le32 i_total;	/* Total bits (clusters)
732 /* Actual on-disk size is one block */
736  * On-disk directory entry structure for OCFS2
738  * Packed as this structure could be accessed unaligned on 64-bit platforms
746 /* Actual on-disk length specified by rec_len */
750  * Per-block record for the unindexed directory btree. This is carefully
786 					 * cluster in index */
787 	__le32		dx_minor_hash;	/* Lower bits used to find
811  * start-of-list pointers.
819 						 * block group */
836 	__le64		dr_suballoc_loc;	/* Suballocator block group
840 						   block group */
844 						   * bits for maximum space
846 		struct ocfs2_dx_entry_list dr_entries; /* In-root-block list of
867  * Largest bitmap for a block (suballocator) group in bytes.  This limit
868  * does not affect cluster groups (global allocator).  Cluster group
874  * On disk allocator group structure for OCFS2
881 	__le16   bg_bits;                /* Bits represented by this
882 					   group. */
883 	__le16	bg_free_bits_count;     /* Free bits count */
886 	__le16   bg_contig_free_bits;   /* max contig free bits length */
888 	__le64   bg_next_group;          /* Next group in my list, in
901 			 * The extents of a discontiguous block group are
904 			 * discontiguous group is signified by a non-zero
905 			 * bg_list->l_next_free_rec.  Only block groups
907 			 * We've never made a block group with more than
910 			 * bg_size of a discontiguous block group will
917 /* Actual on-disk size is one block */
946 					   block group */
962 	__le64 rf_suballoc_loc;		/* Suballocator block group this
965 					   discontiguous block group */
975 /* Actual on-disk size is one block */
993 	__u8	xe_type;         /* the low 7 bits indicate the name prefix
1030  * b-tree like file data.  The xattr value root points to this structure.
1043  * attributes will be organized and stored in an indexed-btree.
1070 					block group */
1078 	__le64	xb_suballoc_loc;	/* Suballocator block group this
1081 					   discontiguous block group */
1097 		xe->xe_type |= OCFS2_XATTR_ENTRY_LOCAL;  in ocfs2_xattr_set_local()
1099 		xe->xe_type &= ~OCFS2_XATTR_ENTRY_LOCAL;  in ocfs2_xattr_set_local()
1104 	return xe->xe_type & OCFS2_XATTR_ENTRY_LOCAL;  in ocfs2_xattr_is_local()
1109 	xe->xe_type |= type & OCFS2_XATTR_TYPE_MASK;  in ocfs2_xattr_set_type()
1114 	return xe->xe_type & OCFS2_XATTR_TYPE_MASK;  in ocfs2_xattr_get_type()
1159 /* Structure with global user / group information. We reserve some space
1177  *  On-disk structures for local quota file
1234 	ptr += blocksize - OCFS2_QBLK_RESERVED_SPACE;  in ocfs2_block_dqtrailer()
1242 	return  sb->s_blocksize -  in ocfs2_fast_symlink_chars()
1249 	unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);  in ocfs2_max_inline_data_with_xattr()
1251 	if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)  in ocfs2_max_inline_data_with_xattr()
1252 		return sb->s_blocksize -  in ocfs2_max_inline_data_with_xattr()
1253 			offsetof(struct ocfs2_dinode, id2.i_data.id_data) -  in ocfs2_max_inline_data_with_xattr()
1256 		return sb->s_blocksize -  in ocfs2_max_inline_data_with_xattr()
1264 	size = sb->s_blocksize -  in ocfs2_extent_recs_per_inode()
1275 	unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);  in ocfs2_extent_recs_per_inode_with_xattr()
1277 	if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)  in ocfs2_extent_recs_per_inode_with_xattr()
1278 		size = sb->s_blocksize -  in ocfs2_extent_recs_per_inode_with_xattr()
1279 			offsetof(struct ocfs2_dinode, id2.i_list.l_recs) -  in ocfs2_extent_recs_per_inode_with_xattr()
1282 		size = sb->s_blocksize -  in ocfs2_extent_recs_per_inode_with_xattr()
1292 	size = sb->s_blocksize -  in ocfs2_extent_recs_per_dx_root()
1302 	size = sb->s_blocksize -  in ocfs2_chain_recs_per_inode()
1312 	size = sb->s_blocksize -  in ocfs2_extent_recs_per_eb()
1322 	size = sb->s_blocksize -  in ocfs2_extent_recs_per_gd()
1332 	size = sb->s_blocksize -  in ocfs2_dx_entries_per_leaf()
1342 	size = sb->s_blocksize -  in ocfs2_dx_entries_per_root()
1352 	size = sb->s_blocksize -  in ocfs2_local_alloc_size()
1362 	int size = sb->s_blocksize -  in ocfs2_group_bitmap_size()
1369 	 * bg_size as-is unless discontig_bg is enabled.  in ocfs2_group_bitmap_size()
1382 	size = sb->s_blocksize -  in ocfs2_truncate_recs_per_inode()
1388 static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index)  in ocfs2_backup_super_blkno()  argument
1392 	if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {  in ocfs2_backup_super_blkno()
1393 		offset <<= (2 * index);  in ocfs2_backup_super_blkno()
1394 		offset >>= sb->s_blocksize_bits;  in ocfs2_backup_super_blkno()
1406 	size = sb->s_blocksize -  in ocfs2_xattr_recs_per_xb()
1417 	size = sb->s_blocksize -  in ocfs2_extent_recs_per_rb()
1427 	size = sb->s_blocksize -  in ocfs2_refcount_recs_per_rb()
1436 	return le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK;  in ocfs2_get_ref_rec_low_cpos()
1441 	return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink);  in ocfs2_fast_symlink_chars()
1447 	if (di && (di->i_dyn_features & OCFS2_INLINE_XATTR_FL))  in ocfs2_max_inline_data_with_xattr()
1448 		return blocksize -  in ocfs2_max_inline_data_with_xattr()
1449 			offsetof(struct ocfs2_dinode, id2.i_data.id_data) -  in ocfs2_max_inline_data_with_xattr()
1450 			di->i_xattr_inline_size;  in ocfs2_max_inline_data_with_xattr()
1452 		return blocksize -  in ocfs2_max_inline_data_with_xattr()
1460 	size = blocksize -  in ocfs2_extent_recs_per_inode()
1470 	size = blocksize -  in ocfs2_chain_recs_per_inode()
1480 	size = blocksize -  in ocfs2_extent_recs_per_eb()
1490 	size = blocksize -  in ocfs2_extent_recs_per_gd()
1500 	size = blocksize -  in ocfs2_local_alloc_size()
1510 	int size = sb->s_blocksize -  in ocfs2_group_bitmap_size()
1517 	 * bg_size as-is unless discontig_bg is enabled.  in ocfs2_group_bitmap_size()
1530 	size = blocksize -  in ocfs2_truncate_recs_per_inode()
1536 static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index)  in ocfs2_backup_super_blkno()  argument
1540 	if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {  in ocfs2_backup_super_blkno()
1541 		offset <<= (2 * index);  in ocfs2_backup_super_blkno()
1553 	size = blocksize -  in ocfs2_xattr_recs_per_xb()
1592 	de->file_type = fs_umode_to_ftype(mode);  in ocfs2_set_de_type()
1598 	     le16_to_cpu(gd->bg_size)) !=  in ocfs2_gd_is_discontig()
1605 	if (!gd->bg_list.l_next_free_rec)  in ocfs2_gd_is_discontig()