/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2007 The DragonFly Project. All rights reserved. * * This code is derived from software contributed to The DragonFly Project * by Matthew Dillon <dillon@backplane.com> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name of The DragonFly Project nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific, prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $DragonFly: src/sys/vfs/hammer/hammer_disk.h,v 1.55 2008/11/13 02:18:43 dillon Exp $ */ #ifndef VFS_HAMMER_DISK_H_ #define VFS_HAMMER_DISK_H_ #include <sys/endian.h> #ifndef _SYS_UUID_H_ #include <sys/uuid.h> #endif /* * The structures below represent the on-disk format for a HAMMER * filesystem. Note that all fields for on-disk structures are naturally * aligned. HAMMER uses little endian for fields in on-disk structures. * HAMMER doesn't support big endian arch, but is planned. * * Most of HAMMER revolves around the concept of an object identifier. An * obj_id is a 64 bit quantity which uniquely identifies a filesystem object * FOR THE ENTIRE LIFE OF THE FILESYSTEM. This uniqueness allows backups * and mirrors to retain varying amounts of filesystem history by removing * any possibility of conflict through identifier reuse. * * A HAMMER filesystem may span multiple volumes. * * A HAMMER filesystem uses a 16K filesystem buffer size. All filesystem * I/O is done in multiples of 16K. * * 64K X-bufs are used for blocks >= a file's 1MB mark. * * Per-volume storage limit: 52 bits 4096 TB * Per-Zone storage limit: 60 bits 1 MTB * Per-filesystem storage limit: 60 bits 1 MTB */ #define HAMMER_BUFSIZE 16384 #define HAMMER_XBUFSIZE 65536 #define HAMMER_HBUFSIZE (HAMMER_BUFSIZE / 2) #define HAMMER_XDEMARC (1024 * 1024) #define HAMMER_BUFMASK (HAMMER_BUFSIZE - 1) #define HAMMER_XBUFMASK (HAMMER_XBUFSIZE - 1) #define HAMMER_BUFSIZE64 ((uint64_t)HAMMER_BUFSIZE) #define HAMMER_BUFMASK64 ((uint64_t)HAMMER_BUFMASK) #define HAMMER_XBUFSIZE64 ((uint64_t)HAMMER_XBUFSIZE) #define HAMMER_XBUFMASK64 ((uint64_t)HAMMER_XBUFMASK) #define HAMMER_OFF_ZONE_MASK 0xF000000000000000ULL /* zone portion */ #define HAMMER_OFF_VOL_MASK 0x0FF0000000000000ULL /* volume portion */ #define HAMMER_OFF_SHORT_MASK 0x000FFFFFFFFFFFFFULL /* offset portion */ #define HAMMER_OFF_LONG_MASK 0x0FFFFFFFFFFFFFFFULL /* offset portion */ #define HAMMER_OFF_BAD ((hammer_off_t)-1) #define HAMMER_BUFSIZE_DOALIGN(offset) \ (((offset) + HAMMER_BUFMASK) & ~HAMMER_BUFMASK) #define HAMMER_BUFSIZE64_DOALIGN(offset) \ (((offset) + HAMMER_BUFMASK64) & ~HAMMER_BUFMASK64) #define HAMMER_XBUFSIZE_DOALIGN(offset) \ (((offset) + HAMMER_XBUFMASK) & ~HAMMER_XBUFMASK) #define HAMMER_XBUFSIZE64_DOALIGN(offset) \ (((offset) + HAMMER_XBUFMASK64) & ~HAMMER_XBUFMASK64) /* * The current limit of volumes that can make up a HAMMER FS */ #define HAMMER_MAX_VOLUMES 256 /* * Reserved space for (future) header junk after the volume header. */ #define HAMMER_MIN_VOL_JUNK (HAMMER_BUFSIZE * 16) /* 256 KB */ #define HAMMER_MAX_VOL_JUNK HAMMER_MIN_VOL_JUNK #define HAMMER_VOL_JUNK_SIZE HAMMER_MIN_VOL_JUNK /* * Hammer transaction ids are 64 bit unsigned integers and are usually * synchronized with the time of day in nanoseconds. * * Hammer offsets are used for FIFO indexing and embed a cycle counter * and volume number in addition to the offset. Most offsets are required * to be 16 KB aligned. */ typedef uint64_t hammer_tid_t; typedef uint64_t hammer_off_t; typedef uint32_t hammer_crc_t; typedef uuid_t hammer_uuid_t; #define HAMMER_MIN_TID 0ULL /* unsigned */ #define HAMMER_MAX_TID 0xFFFFFFFFFFFFFFFFULL /* unsigned */ #define HAMMER_MIN_KEY -0x8000000000000000LL /* signed */ #define HAMMER_MAX_KEY 0x7FFFFFFFFFFFFFFFLL /* signed */ #define HAMMER_MIN_OBJID HAMMER_MIN_KEY /* signed */ #define HAMMER_MAX_OBJID HAMMER_MAX_KEY /* signed */ #define HAMMER_MIN_RECTYPE 0x0U /* unsigned */ #define HAMMER_MAX_RECTYPE 0xFFFFU /* unsigned */ #define HAMMER_MIN_OFFSET 0ULL /* unsigned */ #define HAMMER_MAX_OFFSET 0xFFFFFFFFFFFFFFFFULL /* unsigned */ /* * hammer_off_t has several different encodings. Note that not all zones * encode a vol_no. Zone bits are not a part of filesystem capacity as * the zone bits aren't directly or indirectly mapped to physical volumes. * * In other words, HAMMER's logical filesystem offset consists of 64 bits, * but the filesystem is considered 60 bits filesystem, not 64 bits. * The maximum filesystem capacity is 1EB, not 16EB. * * zone 0: available, a big-block that contains the offset is unused * zone 1 (z,v,o): raw volume relative (offset 0 is the volume header) * zone 2 (z,v,o): raw buffer relative (offset 0 is the first buffer) * zone 3 (z,o): undo/redo fifo - fixed zone-2 offset array in volume header * zone 4 (z,v,o): freemap - only real blockmap * zone 8 (z,v,o): B-Tree - actually zone-2 address * zone 9 (z,v,o): meta - actually zone-2 address * zone 10 (z,v,o): large-data - actually zone-2 address * zone 11 (z,v,o): small-data - actually zone-2 address * zone 15: unavailable, usually the offset is beyond volume size * * layer1/layer2 direct map: * Maximum HAMMER filesystem capacity from volume aspect * 2^8(max volumes) * 2^52(max volume size) = 2^60 = 1EB (long offset) * <-------------------------------------------------------------> * 8bits 52bits (short offset) * <------><-----------------------------------------------------> * zzzzvvvvvvvvoooo oooooooooooooooo oooooooooooooooo oooooooooooooooo * ----111111111111 1111112222222222 222222222ooooooo oooooooooooooooo * <-----------------><------------------><----------------------> * 18bits 19bits 23bits * <-------------------------------------------------------------> * 2^18(layer1) * 2^19(layer2) * 2^23(big-block) = 2^60 = 1EB * Maximum HAMMER filesystem capacity from blockmap aspect * * volume#0 layout * +-------------------------> offset 0 of a device/partition * | volume header (1928 bytes) * | the rest of header junk space (HAMMER_BUFSIZE aligned) * +-------------------------> vol_bot_beg * | boot area (HAMMER_BUFSIZE aligned) * +-------------------------> vol_mem_beg * | memory log (HAMMER_BUFSIZE aligned) * +-------------------------> vol_buf_beg (physical offset of zone-2) * | zone-4 big-block for layer1 * +-------------------------> vol_buf_beg + HAMMER_BIGBLOCK_SIZE * | zone-4 big-blocks for layer2 * | ... (1 big-block per 4TB space) * +-------------------------> vol_buf_beg + HAMMER_BIGBLOCK_SIZE * ... * | zone-3 big-blocks for UNDO/REDO FIFO * | ... (max 128 big-blocks) * +-------------------------> vol_buf_beg + HAMMER_BIGBLOCK_SIZE * ... * | zone-8 big-block for root B-Tree node/etc * +-------------------------> vol_buf_beg + HAMMER_BIGBLOCK_SIZE * ... * | zone-9 big-block for root inode/PFS/etc * +-------------------------> vol_buf_beg + HAMMER_BIGBLOCK_SIZE * ... * | zone-X big-blocks * | ... (big-blocks for new zones after newfs_hammer) * | ... * | ... * | ... * | ... * +-------------------------> vol_buf_end (HAMMER_BUFSIZE aligned) * +-------------------------> end of a device/partition * * volume#N layout (0<N<256) * +-------------------------> offset 0 of a device/partition * | volume header (1928 bytes) * | the rest of header junk space (HAMMER_BUFSIZE aligned) * +-------------------------> vol_bot_beg * | boot area (HAMMER_BUFSIZE aligned) * +-------------------------> vol_mem_beg * | memory log (HAMMER_BUFSIZE aligned) * +-------------------------> vol_buf_beg (physical offset of zone-2) * | zone-4 big-blocks for layer2 * | ... (1 big-block per 4TB space) * +-------------------------> vol_buf_beg + HAMMER_BIGBLOCK_SIZE * ... * | zone-X big-blocks * | ... (unused until volume#(N-1) runs out of space) * | ... * | ... * | ... * | ... * +-------------------------> vol_buf_end (HAMMER_BUFSIZE aligned) * +-------------------------> end of a device/partition */ #define HAMMER_ZONE_RAW_VOLUME 0x1000000000000000ULL #define HAMMER_ZONE_RAW_BUFFER 0x2000000000000000ULL #define HAMMER_ZONE_UNDO 0x3000000000000000ULL #define HAMMER_ZONE_FREEMAP 0x4000000000000000ULL #define HAMMER_ZONE_RESERVED05 0x5000000000000000ULL /* not used */ #define HAMMER_ZONE_RESERVED06 0x6000000000000000ULL /* not used */ #define HAMMER_ZONE_RESERVED07 0x7000000000000000ULL /* not used */ #define HAMMER_ZONE_BTREE 0x8000000000000000ULL #define HAMMER_ZONE_META 0x9000000000000000ULL #define HAMMER_ZONE_LARGE_DATA 0xA000000000000000ULL #define HAMMER_ZONE_SMALL_DATA 0xB000000000000000ULL #define HAMMER_ZONE_RESERVED0C 0xC000000000000000ULL /* not used */ #define HAMMER_ZONE_RESERVED0D 0xD000000000000000ULL /* not used */ #define HAMMER_ZONE_RESERVED0E 0xE000000000000000ULL /* not used */ #define HAMMER_ZONE_UNAVAIL 0xF000000000000000ULL #define HAMMER_ZONE_RAW_VOLUME_INDEX 1 #define HAMMER_ZONE_RAW_BUFFER_INDEX 2 #define HAMMER_ZONE_UNDO_INDEX 3 #define HAMMER_ZONE_FREEMAP_INDEX 4 #define HAMMER_ZONE_BTREE_INDEX 8 #define HAMMER_ZONE_META_INDEX 9 #define HAMMER_ZONE_LARGE_DATA_INDEX 10 #define HAMMER_ZONE_SMALL_DATA_INDEX 11 #define HAMMER_ZONE_UNAVAIL_INDEX 15 #define HAMMER_MAX_ZONES 16 #define HAMMER_ZONE(offset) ((offset) & HAMMER_OFF_ZONE_MASK) #define hammer_is_zone_raw_volume(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_RAW_VOLUME) #define hammer_is_zone_raw_buffer(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_RAW_BUFFER) #define hammer_is_zone_undo(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_UNDO) #define hammer_is_zone_freemap(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_FREEMAP) #define hammer_is_zone_btree(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_BTREE) #define hammer_is_zone_meta(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_META) #define hammer_is_zone_large_data(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_LARGE_DATA) #define hammer_is_zone_small_data(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_SMALL_DATA) #define hammer_is_zone_unavail(offset) \ (HAMMER_ZONE(offset) == HAMMER_ZONE_UNAVAIL) #define hammer_is_zone_data(offset) \ (hammer_is_zone_large_data(offset) || hammer_is_zone_small_data(offset)) #define hammer_is_index_record(zone) \ ((zone) >= HAMMER_ZONE_BTREE_INDEX && \ (zone) < HAMMER_MAX_ZONES) #define hammer_is_zone_record(offset) \ hammer_is_index_record(HAMMER_ZONE_DECODE(offset)) #define hammer_is_index_direct_xlated(zone) \ (((zone) == HAMMER_ZONE_RAW_BUFFER_INDEX) || \ ((zone) == HAMMER_ZONE_FREEMAP_INDEX) || \ hammer_is_index_record(zone)) #define hammer_is_zone_direct_xlated(offset) \ hammer_is_index_direct_xlated(HAMMER_ZONE_DECODE(offset)) #define HAMMER_ZONE_ENCODE(zone, ham_off) \ (((hammer_off_t)(zone) << 60) | (ham_off)) #define HAMMER_ZONE_DECODE(ham_off) \ ((int)(((hammer_off_t)(ham_off) >> 60))) #define HAMMER_VOL_ENCODE(vol_no) \ ((hammer_off_t)((vol_no) & 255) << 52) #define HAMMER_VOL_DECODE(ham_off) \ ((int)(((hammer_off_t)(ham_off) >> 52) & 255)) #define HAMMER_OFF_SHORT_ENCODE(offset) \ ((hammer_off_t)(offset) & HAMMER_OFF_SHORT_MASK) #define HAMMER_OFF_LONG_ENCODE(offset) \ ((hammer_off_t)(offset) & HAMMER_OFF_LONG_MASK) #define HAMMER_ENCODE(zone, vol_no, offset) \ (((hammer_off_t)(zone) << 60) | \ HAMMER_VOL_ENCODE(vol_no) | \ HAMMER_OFF_SHORT_ENCODE(offset)) #define HAMMER_ENCODE_RAW_VOLUME(vol_no, offset) \ HAMMER_ENCODE(HAMMER_ZONE_RAW_VOLUME_INDEX, vol_no, offset) #define HAMMER_ENCODE_RAW_BUFFER(vol_no, offset) \ HAMMER_ENCODE(HAMMER_ZONE_RAW_BUFFER_INDEX, vol_no, offset) #define HAMMER_ENCODE_UNDO(offset) \ HAMMER_ENCODE(HAMMER_ZONE_UNDO_INDEX, HAMMER_ROOT_VOLNO, offset) #define HAMMER_ENCODE_FREEMAP(vol_no, offset) \ HAMMER_ENCODE(HAMMER_ZONE_FREEMAP_INDEX, vol_no, offset) /* * Translate a zone address to zone-X address. */ #define hammer_xlate_to_zoneX(zone, offset) \ HAMMER_ZONE_ENCODE((zone), (offset) & ~HAMMER_OFF_ZONE_MASK) #define hammer_xlate_to_zone2(offset) \ hammer_xlate_to_zoneX(HAMMER_ZONE_RAW_BUFFER_INDEX, (offset)) #define hammer_data_zone(data_len) \ (((data_len) >= HAMMER_BUFSIZE) ? \ HAMMER_ZONE_LARGE_DATA : \ HAMMER_ZONE_SMALL_DATA) #define hammer_data_zone_index(data_len) \ (((data_len) >= HAMMER_BUFSIZE) ? \ HAMMER_ZONE_LARGE_DATA_INDEX : \ HAMMER_ZONE_SMALL_DATA_INDEX) /* * Big-Block backing store * * A blockmap is a two-level map which translates a blockmap-backed zone * offset into a raw zone 2 offset. The layer 1 handles 18 bits and the * layer 2 handles 19 bits. The 8M big-block size is 23 bits so two * layers gives us 18+19+23 = 60 bits of address space. * * When using hinting for a blockmap lookup, the hint is lost when the * scan leaves the HINTBLOCK, which is typically several BIGBLOCK's. * HINTBLOCK is a heuristic. */ #define HAMMER_HINTBLOCK_SIZE (HAMMER_BIGBLOCK_SIZE * 4) #define HAMMER_HINTBLOCK_MASK64 ((uint64_t)HAMMER_HINTBLOCK_SIZE - 1) #define HAMMER_BIGBLOCK_SIZE (8192 * 1024) #define HAMMER_BIGBLOCK_SIZE64 ((uint64_t)HAMMER_BIGBLOCK_SIZE) #define HAMMER_BIGBLOCK_MASK (HAMMER_BIGBLOCK_SIZE - 1) #define HAMMER_BIGBLOCK_MASK64 ((uint64_t)HAMMER_BIGBLOCK_SIZE - 1) #define HAMMER_BIGBLOCK_BITS 23 #if 0 #define HAMMER_BIGBLOCK_OVERFILL (6144 * 1024) #endif #if (1 << HAMMER_BIGBLOCK_BITS) != HAMMER_BIGBLOCK_SIZE #error "HAMMER_BIGBLOCK_BITS BROKEN" #endif #define HAMMER_BUFFERS_PER_BIGBLOCK \ (HAMMER_BIGBLOCK_SIZE / HAMMER_BUFSIZE) #define HAMMER_BUFFERS_PER_BIGBLOCK_MASK \ (HAMMER_BUFFERS_PER_BIGBLOCK - 1) #define HAMMER_BUFFERS_PER_BIGBLOCK_MASK64 \ ((hammer_off_t)HAMMER_BUFFERS_PER_BIGBLOCK_MASK) #define HAMMER_BIGBLOCK_DOALIGN(offset) \ (((offset) + HAMMER_BIGBLOCK_MASK64) & ~HAMMER_BIGBLOCK_MASK64) /* * Maximum number of mirrors operating in master mode (multi-master * clustering and mirroring). Note that HAMMER1 does not support * multi-master clustering as of 2015. */ #define HAMMER_MAX_MASTERS 16 /* * The blockmap is somewhat of a degenerate structure. HAMMER only actually * uses it in its original incarnation to implement the freemap. * * zone:1 raw volume (no blockmap) * zone:2 raw buffer (no blockmap) * zone:3 undomap (direct layer2 array in volume header) * zone:4 freemap (the only real blockmap) * zone:8-15 zone id used to classify big-block only, address is actually * a zone-2 address. */ typedef struct hammer_blockmap { hammer_off_t phys_offset; /* zone-2 offset only used by zone-4 */ hammer_off_t first_offset; /* zone-X offset only used by zone-3 */ hammer_off_t next_offset; /* zone-X offset for allocation */ hammer_off_t alloc_offset; /* zone-X offset only used by zone-3 */ uint32_t reserved01; hammer_crc_t entry_crc; } *hammer_blockmap_t; #define HAMMER_BLOCKMAP_CRCSIZE \ offsetof(struct hammer_blockmap, entry_crc) /* * The blockmap is a 2-layer entity made up of big-blocks. The first layer * contains 262144 32-byte entries (18 bits), the second layer contains * 524288 16-byte entries (19 bits), representing 8MB (23 bit) blockmaps. * 18+19+23 = 60 bits. The top four bits are the zone id. * * Currently only the freemap utilizes both layers in all their glory. * All primary data/meta-data zones actually encode a zone-2 address * requiring no real blockmap translation. * * The freemap uses the upper 8 bits of layer-1 to identify the volume, * thus any space allocated via the freemap can be directly translated * to a zone:2 (or zone:8-15) address. * * zone-X blockmap offset: [zone:4][layer1:18][layer2:19][big-block:23] */ /* * 32 bytes layer1 entry for 8MB big-block. * A big-block can hold 2^23 / 2^5 = 2^18 layer1 entries, * which equals bits assigned for layer1 in zone-2 address. */ typedef struct hammer_blockmap_layer1 { hammer_off_t blocks_free; /* big-blocks free */ hammer_off_t phys_offset; /* UNAVAIL or zone-2 */ hammer_off_t reserved01; hammer_crc_t layer2_crc; /* xor'd crc's of HAMMER_BLOCKSIZE */ /* (not yet used) */ hammer_crc_t layer1_crc; /* MUST BE LAST FIELD OF STRUCTURE*/ } *hammer_blockmap_layer1_t; #define HAMMER_LAYER1_CRCSIZE \ offsetof(struct hammer_blockmap_layer1, layer1_crc) /* * 16 bytes layer2 entry for 8MB big-blocks. * A big-block can hold 2^23 / 2^4 = 2^19 layer2 entries, * which equals bits assigned for layer2 in zone-2 address. * * NOTE: bytes_free is signed and can legally go negative if/when data * de-dup occurs. This field will never go higher than * HAMMER_BIGBLOCK_SIZE. If exactly HAMMER_BIGBLOCK_SIZE * the big-block is completely free. */ typedef struct hammer_blockmap_layer2 { uint8_t zone; /* typed allocation zone */ uint8_t reserved01; uint16_t reserved02; uint32_t append_off; /* allocatable space index */ int32_t bytes_free; /* bytes free within this big-block */ hammer_crc_t entry_crc; } *hammer_blockmap_layer2_t; #define HAMMER_LAYER2_CRCSIZE \ offsetof(struct hammer_blockmap_layer2, entry_crc) #define HAMMER_BLOCKMAP_UNAVAIL ((hammer_off_t)-1LL) #define HAMMER_BLOCKMAP_RADIX1 /* 2^18 = 262144 */ \ ((int)(HAMMER_BIGBLOCK_SIZE / sizeof(struct hammer_blockmap_layer1))) #define HAMMER_BLOCKMAP_RADIX2 /* 2^19 = 524288 */ \ ((int)(HAMMER_BIGBLOCK_SIZE / sizeof(struct hammer_blockmap_layer2))) #define HAMMER_BLOCKMAP_LAYER1 /* 2^(18+19+23) = 1EB */ \ (HAMMER_BLOCKMAP_RADIX1 * HAMMER_BLOCKMAP_LAYER2) #define HAMMER_BLOCKMAP_LAYER2 /* 2^(19+23) = 4TB */ \ (HAMMER_BLOCKMAP_RADIX2 * HAMMER_BIGBLOCK_SIZE64) #define HAMMER_BLOCKMAP_LAYER1_MASK (HAMMER_BLOCKMAP_LAYER1 - 1) #define HAMMER_BLOCKMAP_LAYER2_MASK (HAMMER_BLOCKMAP_LAYER2 - 1) #define HAMMER_BLOCKMAP_LAYER2_DOALIGN(offset) \ (((offset) + HAMMER_BLOCKMAP_LAYER2_MASK) & \ ~HAMMER_BLOCKMAP_LAYER2_MASK) /* * Index within layer1 or layer2 big-block for the entry representing * a zone-2 physical offset. */ #define HAMMER_BLOCKMAP_LAYER1_INDEX(zone2_offset) \ ((int)(((zone2_offset) & HAMMER_BLOCKMAP_LAYER1_MASK) / \ HAMMER_BLOCKMAP_LAYER2)) #define HAMMER_BLOCKMAP_LAYER2_INDEX(zone2_offset) \ ((int)(((zone2_offset) & HAMMER_BLOCKMAP_LAYER2_MASK) / \ HAMMER_BIGBLOCK_SIZE64)) /* * Byte offset within layer1 or layer2 big-block for the entry representing * a zone-2 physical offset. Multiply the index by sizeof(blockmap_layer). */ #define HAMMER_BLOCKMAP_LAYER1_OFFSET(zone2_offset) \ (HAMMER_BLOCKMAP_LAYER1_INDEX(zone2_offset) * \ sizeof(struct hammer_blockmap_layer1)) #define HAMMER_BLOCKMAP_LAYER2_OFFSET(zone2_offset) \ (HAMMER_BLOCKMAP_LAYER2_INDEX(zone2_offset) * \ sizeof(struct hammer_blockmap_layer2)) /* * Move on to offset 0 of the next layer1 or layer2. */ #define HAMMER_ZONE_LAYER1_NEXT_OFFSET(offset) \ (((offset) + HAMMER_BLOCKMAP_LAYER2) & ~HAMMER_BLOCKMAP_LAYER2_MASK) #define HAMMER_ZONE_LAYER2_NEXT_OFFSET(offset) \ (((offset) + HAMMER_BIGBLOCK_SIZE) & ~HAMMER_BIGBLOCK_MASK64) /* * HAMMER UNDO parameters. The UNDO fifo is mapped directly in the volume * header with an array of zone-2 offsets. A maximum of (128x8MB) = 1GB, * and minimum of (64x8MB) = 512MB may be reserved. The size of the undo * fifo is usually set a newfs time. */ #define HAMMER_MIN_UNDO_BIGBLOCKS 64 #define HAMMER_MAX_UNDO_BIGBLOCKS 128 /* * All on-disk HAMMER structures which make up elements of the UNDO FIFO * contain a hammer_fifo_head and hammer_fifo_tail structure. This structure * contains all the information required to validate the fifo element * and to scan the fifo in either direction. The head is typically embedded * in higher level hammer on-disk structures while the tail is typically * out-of-band. hdr_size is the size of the whole mess, including the tail. * * All undo structures are guaranteed to not cross a 16K filesystem * buffer boundary. Most undo structures are fairly small. Data spaces * are not immediately reused by HAMMER so file data is not usually recorded * as part of an UNDO. * * PAD elements are allowed to take up only 8 bytes of space as a special * case, containing only hdr_signature, hdr_type, and hdr_size fields, * and with the tail overloaded onto the head structure for 8 bytes total. * * Every undo record has a sequence number. This number is unrelated to * transaction ids and instead collects the undo transactions associated * with a single atomic operation. A larger transactional operation, such * as a remove(), may consist of several smaller atomic operations * representing raw meta-data operations. * * HAMMER VERSION 4 CHANGES * * In HAMMER version 4 the undo structure alignment is reduced from 16384 * to 512 bytes in order to ensure that each 512 byte sector begins with * a header. The hdr_seq field in the header is a 32 bit sequence number * which allows the recovery code to detect missing sectors * without relying on the 32-bit crc and to definitively identify the current * undo sequence space without having to rely on information from the volume * header. In addition, new REDO entries in the undo space are used to * record write, write/extend, and transaction id updates. * * The grand result is: * * (1) The volume header no longer needs to be synchronized for most * flush and fsync operations. * * (2) Most fsync operations need only lay down REDO records * * (3) Data overwrite for nohistory operations covered by REDO records * can be supported (instead of rolling a new block allocation), * by rolling UNDO for the prior contents of the data. * * HAMMER VERSION 5 CHANGES * * Hammer version 5 contains a minor adjustment making layer2's bytes_free * field signed, allowing dedup to push it into the negative domain. */ #define HAMMER_HEAD_ALIGN 8 #define HAMMER_HEAD_ALIGN_MASK (HAMMER_HEAD_ALIGN - 1) #define HAMMER_HEAD_DOALIGN(bytes) \ (((bytes) + HAMMER_HEAD_ALIGN_MASK) & ~HAMMER_HEAD_ALIGN_MASK) #define HAMMER_UNDO_ALIGN 512 #define HAMMER_UNDO_ALIGN64 ((uint64_t)512) #define HAMMER_UNDO_MASK (HAMMER_UNDO_ALIGN - 1) #define HAMMER_UNDO_MASK64 (HAMMER_UNDO_ALIGN64 - 1) #define HAMMER_UNDO_DOALIGN(offset) \ (((offset) + HAMMER_UNDO_MASK) & ~HAMMER_UNDO_MASK64) typedef struct hammer_fifo_head { uint16_t hdr_signature; uint16_t hdr_type; uint32_t hdr_size; /* Aligned size of the whole mess */ uint32_t hdr_seq; /* Sequence number */ hammer_crc_t hdr_crc; /* XOR crc up to field w/ crc after field */ } *hammer_fifo_head_t; #define HAMMER_FIFO_HEAD_CRCOFF offsetof(struct hammer_fifo_head, hdr_crc) typedef struct hammer_fifo_tail { uint16_t tail_signature; uint16_t tail_type; uint32_t tail_size; /* aligned size of the whole mess */ } *hammer_fifo_tail_t; /* * Fifo header types. * * NOTE: 0x8000U part of HAMMER_HEAD_TYPE_PAD can be removed if the HAMMER * version ever gets bumped again. It exists only to keep compatibility with * older versions. */ #define HAMMER_HEAD_TYPE_PAD (0x0040U | 0x8000U) #define HAMMER_HEAD_TYPE_DUMMY 0x0041U /* dummy entry w/seqno */ #define HAMMER_HEAD_TYPE_UNDO 0x0043U /* random UNDO information */ #define HAMMER_HEAD_TYPE_REDO 0x0044U /* data REDO / fast fsync */ #define HAMMER_HEAD_SIGNATURE 0xC84EU #define HAMMER_TAIL_SIGNATURE 0xC74FU /* * Misc FIFO structures. * * UNDO - Raw meta-data media updates. */ typedef struct hammer_fifo_undo { struct hammer_fifo_head head; hammer_off_t undo_offset; /* zone-1,2 offset */ int32_t undo_data_bytes; int32_t undo_reserved01; /* followed by data */ } *hammer_fifo_undo_t; /* * REDO (HAMMER version 4+) - Logical file writes/truncates. * * REDOs contain information which will be duplicated in a later meta-data * update, allowing fast write()+fsync() operations. REDOs can be ignored * without harming filesystem integrity but must be processed if fsync() * semantics are desired. * * Unlike UNDOs which are processed backwards within the recovery span, * REDOs must be processed forwards starting further back (starting outside * the recovery span). * * WRITE - Write logical file (with payload). Executed both * out-of-span and in-span. Out-of-span WRITEs may be * filtered out by TERMs. * * TRUNC - Truncate logical file (no payload). Executed both * out-of-span and in-span. Out-of-span WRITEs may be * filtered out by TERMs. * * TERM_* - Indicates meta-data was committed (if out-of-span) or * will be rolled-back (in-span). Any out-of-span TERMs * matching earlier WRITEs remove those WRITEs from * consideration as they might conflict with a later data * commit (which is not being rolled-back). * * SYNC - The earliest in-span SYNC (the last one when scanning * backwards) tells the recovery code how far out-of-span * it must go to run REDOs. * * NOTE: WRITEs do not always have matching TERMs even under * perfect conditions because truncations might remove the * buffers from consideration. I/O problems can also remove * buffers from consideration. * * TRUNCSs do not always have matching TERMs because several * truncations may be aggregated together into a single TERM. */ typedef struct hammer_fifo_redo { struct hammer_fifo_head head; int64_t redo_objid; /* file being written */ hammer_off_t redo_offset; /* logical offset in file */ int32_t redo_data_bytes; uint32_t redo_flags; uint32_t redo_localization; uint32_t redo_reserved01; uint64_t redo_reserved02; /* followed by data */ } *hammer_fifo_redo_t; #define HAMMER_REDO_WRITE 0x00000001 #define HAMMER_REDO_TRUNC 0x00000002 #define HAMMER_REDO_TERM_WRITE 0x00000004 #define HAMMER_REDO_TERM_TRUNC 0x00000008 #define HAMMER_REDO_SYNC 0x00000010 typedef union hammer_fifo_any { struct hammer_fifo_head head; struct hammer_fifo_undo undo; struct hammer_fifo_redo redo; } *hammer_fifo_any_t; /* * Volume header types */ #define HAMMER_FSBUF_VOLUME 0xC8414D4DC5523031ULL /* HAMMER01 */ #define HAMMER_FSBUF_VOLUME_REV 0x313052C54D4D41C8ULL /* (reverse endian) */ /* * HAMMER Volume header * * A HAMMER filesystem can be built from 1-256 block devices, each block * device contains a volume header followed by however many buffers fit * into the volume. * * One of the volumes making up a HAMMER filesystem is the root volume. * The root volume is always volume #0 which is the first block device path * specified by newfs_hammer(8). All HAMMER volumes have a volume header, * however the root volume may be the only volume that has valid values for * some fields in the header. * * Special field notes: * * vol_bot_beg - offset of boot area (mem_beg - bot_beg bytes) * vol_mem_beg - offset of memory log (buf_beg - mem_beg bytes) * vol_buf_beg - offset of the first buffer in volume * vol_buf_end - offset of volume EOF (on buffer boundary) * * The memory log area allows a kernel to cache new records and data * in memory without allocating space in the actual filesystem to hold * the records and data. In the event that a filesystem becomes full, * any records remaining in memory can be flushed to the memory log * area. This allows the kernel to immediately return success. * * The buffer offset is a physical offset of zone-2 offset. The lower * 52 bits of the zone-2 offset is added to the buffer offset of each * volume to generate an actual I/O offset within the block device. * * NOTE: boot area and memory log are currently not used. */ /* * Filesystem type string */ #define HAMMER_FSTYPE_STRING "DragonFly HAMMER" /* * These macros are only used by userspace when userspace commands either * initialize or add a new HAMMER volume. */ #define HAMMER_BOOT_MINBYTES (32*1024) #define HAMMER_BOOT_NOMBYTES (64LL*1024*1024) #define HAMMER_BOOT_MAXBYTES (256LL*1024*1024) #define HAMMER_MEM_MINBYTES (256*1024) #define HAMMER_MEM_NOMBYTES (1LL*1024*1024*1024) #define HAMMER_MEM_MAXBYTES (64LL*1024*1024*1024) typedef struct hammer_volume_ondisk { uint64_t vol_signature; /* HAMMER_FSBUF_VOLUME for a valid header */ /* * These are relative to block device offset, not zone offsets. */ int64_t vol_bot_beg; /* offset of boot area */ int64_t vol_mem_beg; /* offset of memory log */ int64_t vol_buf_beg; /* offset of the first buffer in volume */ int64_t vol_buf_end; /* offset of volume EOF (on buffer boundary) */ int64_t vol_reserved01; hammer_uuid_t vol_fsid; /* identify filesystem */ hammer_uuid_t vol_fstype; /* identify filesystem type */ char vol_label[64]; /* filesystem label */ int32_t vol_no; /* volume number within filesystem */ int32_t vol_count; /* number of volumes making up filesystem */ uint32_t vol_version; /* version control information */ hammer_crc_t vol_crc; /* header crc */ uint32_t vol_flags; /* volume flags */ uint32_t vol_rootvol; /* the root volume number (must be 0) */ uint32_t vol_reserved[8]; /* * These fields are initialized and space is reserved in every * volume making up a HAMMER filesystem, but only the root volume * contains valid data. Note that vol0_stat_bigblocks does not * include big-blocks for freemap and undomap initially allocated * by newfs_hammer(8). */ int64_t vol0_stat_bigblocks; /* total big-blocks when fs is empty */ int64_t vol0_stat_freebigblocks;/* number of free big-blocks */ int64_t vol0_reserved01; int64_t vol0_stat_inodes; /* for statfs only */ int64_t vol0_reserved02; hammer_off_t vol0_btree_root; /* B-Tree root offset in zone-8 */ hammer_tid_t vol0_next_tid; /* highest partially synchronized TID */ hammer_off_t vol0_reserved03; /* * Blockmaps for zones. Not all zones use a blockmap. Note that * the entire root blockmap is cached in the hammer_mount structure. */ struct hammer_blockmap vol0_blockmap[HAMMER_MAX_ZONES]; /* * Array of zone-2 addresses for undo FIFO. */ hammer_off_t vol0_undo_array[HAMMER_MAX_UNDO_BIGBLOCKS]; } *hammer_volume_ondisk_t; #define HAMMER_ROOT_VOLNO 0 #define HAMMER_VOLF_NEEDFLUSH 0x0004 /* volume needs flush */ #define HAMMER_VOL_CRCSIZE1 \ offsetof(struct hammer_volume_ondisk, vol_crc) #define HAMMER_VOL_CRCSIZE2 \ (sizeof(struct hammer_volume_ondisk) - HAMMER_VOL_CRCSIZE1 - \ sizeof(hammer_crc_t)) #define HAMMER_VOL_VERSION_MIN 1 /* minimum supported version */ #define HAMMER_VOL_VERSION_DEFAULT 7 /* newfs default version */ #define HAMMER_VOL_VERSION_WIP 8 /* version >= this is WIP */ #define HAMMER_VOL_VERSION_MAX 7 /* maximum supported version */ #define HAMMER_VOL_VERSION_ONE 1 #define HAMMER_VOL_VERSION_TWO 2 /* new dirent layout (2.3+) */ #define HAMMER_VOL_VERSION_THREE 3 /* new snapshot layout (2.5+) */ #define HAMMER_VOL_VERSION_FOUR 4 /* new undo/flush (2.5+) */ #define HAMMER_VOL_VERSION_FIVE 5 /* dedup (2.9+) */ #define HAMMER_VOL_VERSION_SIX 6 /* DIRHASH_ALG1 */ #define HAMMER_VOL_VERSION_SEVEN 7 /* use the faster iscsi_crc */ /* * Translate a zone-2 address to physical address */ #define hammer_xlate_to_phys(volume, zone2_offset) \ ((volume)->vol_buf_beg + HAMMER_OFF_SHORT_ENCODE(zone2_offset)) /* * Translate a zone-3 address to zone-2 address */ #define HAMMER_UNDO_INDEX(zone3_offset) \ (HAMMER_OFF_SHORT_ENCODE(zone3_offset) / HAMMER_BIGBLOCK_SIZE) #define hammer_xlate_to_undo(volume, zone3_offset) \ ((volume)->vol0_undo_array[HAMMER_UNDO_INDEX(zone3_offset)] + \ (zone3_offset & HAMMER_BIGBLOCK_MASK64)) /* * Effective per-volume filesystem capacity including big-blocks for layer1/2 */ #define HAMMER_VOL_BUF_SIZE(volume) \ ((volume)->vol_buf_end - (volume)->vol_buf_beg) /* * Record types are fairly straightforward. The B-Tree includes the record * type in its index sort. */ #define HAMMER_RECTYPE_UNKNOWN 0x0000 #define HAMMER_RECTYPE_INODE 0x0001 /* inode in obj_id space */ #define HAMMER_RECTYPE_DATA 0x0010 #define HAMMER_RECTYPE_DIRENTRY 0x0011 #define HAMMER_RECTYPE_DB 0x0012 #define HAMMER_RECTYPE_EXT 0x0013 /* ext attributes */ #define HAMMER_RECTYPE_FIX 0x0014 /* fixed attribute */ #define HAMMER_RECTYPE_PFS 0x0015 /* PFS management */ #define HAMMER_RECTYPE_SNAPSHOT 0x0016 /* Snapshot management */ #define HAMMER_RECTYPE_CONFIG 0x0017 /* hammer cleanup config */ #define HAMMER_RECTYPE_MAX 0xFFFF #define HAMMER_RECTYPE_ENTRY_START (HAMMER_RECTYPE_INODE + 1) #define HAMMER_RECTYPE_CLEAN_START HAMMER_RECTYPE_EXT #define HAMMER_FIXKEY_SYMLINK 1 #define HAMMER_OBJTYPE_UNKNOWN 0 /* never exists on-disk as unknown */ #define HAMMER_OBJTYPE_DIRECTORY 1 #define HAMMER_OBJTYPE_REGFILE 2 #define HAMMER_OBJTYPE_DBFILE 3 #define HAMMER_OBJTYPE_FIFO 4 #define HAMMER_OBJTYPE_CDEV 5 #define HAMMER_OBJTYPE_BDEV 6 #define HAMMER_OBJTYPE_SOFTLINK 7 #define HAMMER_OBJTYPE_PSEUDOFS 8 /* pseudo filesystem obj */ #define HAMMER_OBJTYPE_SOCKET 9 /* * HAMMER inode attribute data * * The data reference for a HAMMER inode points to this structure. Any * modifications to the contents of this structure will result in a * replacement operation. * * parent_obj_id is only valid for directories (which cannot be hard-linked), * and specifies the parent directory obj_id. This field will also be set * for non-directory inodes as a recovery aid, but can wind up holding * stale information. However, since object id's are not reused, the worse * that happens is that the recovery code is unable to use it. * A parent_obj_id of 0 means it's a root inode of root or non-root PFS. * * NOTE: Future note on directory hardlinks. We can implement a record type * which allows us to point to multiple parent directories. */ typedef struct hammer_inode_data { uint16_t version; /* inode data version */ uint16_t mode; /* basic unix permissions */ uint32_t uflags; /* chflags */ uint32_t rmajor; /* used by device nodes */ uint32_t rminor; /* used by device nodes */ uint64_t ctime; int64_t parent_obj_id; /* parent directory obj_id */ hammer_uuid_t uid; hammer_uuid_t gid; uint8_t obj_type; uint8_t cap_flags; /* capability support flags (extension) */ uint16_t reserved01; uint32_t reserved02; uint64_t nlinks; /* hard links */ uint64_t size; /* filesystem object size */ union { char symlink[24]; /* HAMMER_INODE_BASESYMLEN */ } ext; uint64_t mtime; /* mtime must be second-to-last */ uint64_t atime; /* atime must be last */ } *hammer_inode_data_t; /* * Neither mtime nor atime updates are CRCd by the B-Tree element. * mtime updates have UNDO, atime updates do not. */ #define HAMMER_INODE_CRCSIZE \ offsetof(struct hammer_inode_data, mtime) #define HAMMER_INODE_DATA_VERSION 1 #define HAMMER_OBJID_ROOT 1 /* root inodes # */ #define HAMMER_INODE_BASESYMLEN 24 /* see ext.symlink */ /* * Capability & implementation flags. * * HAMMER_INODE_CAP_DIR_LOCAL_INO - Use inode B-Tree localization * for directory entries. Also see HAMMER_DIR_INODE_LOCALIZATION(). */ #define HAMMER_INODE_CAP_DIRHASH_MASK 0x03 /* directory: hash algorithm */ #define HAMMER_INODE_CAP_DIRHASH_ALG0 0x00 #define HAMMER_INODE_CAP_DIRHASH_ALG1 0x01 #define HAMMER_INODE_CAP_DIRHASH_ALG2 0x02 #define HAMMER_INODE_CAP_DIRHASH_ALG3 0x03 #define HAMMER_INODE_CAP_DIR_LOCAL_INO 0x04 /* use inode localization */ #define HAMMER_DATA_DOALIGN(offset) \ (((offset) + 15) & ~15) #define HAMMER_DATA_DOALIGN_WITH(type, offset) \ (((type)(offset) + 15) & (~(type)15)) /* * A HAMMER directory entry associates a HAMMER filesystem object with a * namespace. It is hooked into a pseudo-filesystem (with its own inode * numbering space) in the filesystem by setting the high 16 bits of the * localization field. The low 16 bits must be 0 and are reserved for * future use. * * Directory entries are indexed with a 128 bit namekey rather then an * offset. A portion of the namekey is an iterator/randomizer to deal * with collisions. * * NOTE: leaf.base.obj_type from the related B-Tree leaf entry holds * the filesystem object type of obj_id, e.g. a den_type equivalent. * It is not stored in hammer_direntry_data. * * NOTE: name field / the filename data reference is NOT terminated with \0. */ typedef struct hammer_direntry_data { int64_t obj_id; /* object being referenced */ uint32_t localization; /* identify pseudo-filesystem */ uint32_t reserved01; char name[16]; /* name (extended) */ } *hammer_direntry_data_t; #define HAMMER_ENTRY_NAME_OFF offsetof(struct hammer_direntry_data, name[0]) #define HAMMER_ENTRY_SIZE(nlen) offsetof(struct hammer_direntry_data, name[nlen]) /* * Symlink data which does not fit in the inode is stored in a separate * FIX type record. */ typedef struct hammer_symlink_data { char name[16]; /* name (extended) */ } *hammer_symlink_data_t; #define HAMMER_SYMLINK_NAME_OFF offsetof(struct hammer_symlink_data, name[0]) /* * The root inode for the primary filesystem and root inode for any * pseudo-fs may be tagged with an optional data structure using * HAMMER_RECTYPE_PFS and localization id. This structure allows * the node to be used as a mirroring master or slave. * * When operating as a slave CD's into the node automatically become read-only * and as-of sync_end_tid. * * When operating as a master the read PFSD info sets sync_end_tid to * the most recently flushed TID. * * sync_low_tid is not yet used but will represent the highest pruning * end-point, after which full history is available. * * We need to pack this structure making it equally sized on both 32-bit and * 64-bit machines as it is part of struct hammer_ioc_mrecord_pfs which is * send over the wire in hammer mirror operations. Only on 64-bit machines * the size of this struct differ when packed or not. This leads us to the * situation where old 64-bit systems (using the non-packed structure), * which were never able to mirror to/from 32-bit systems, are now no longer * able to mirror to/from newer 64-bit systems (using the packed structure). */ struct hammer_pseudofs_data { hammer_tid_t sync_low_tid; /* full history beyond this point */ hammer_tid_t sync_beg_tid; /* earliest tid w/ full history avail */ hammer_tid_t sync_end_tid; /* current synchronizatoin point */ uint64_t sync_beg_ts; /* real-time of last completed sync */ uint64_t sync_end_ts; /* initiation of current sync cycle */ hammer_uuid_t shared_uuid; /* shared uuid (match required) */ hammer_uuid_t unique_uuid; /* unique uuid of this master/slave */ int32_t reserved01; /* reserved for future master_id */ int32_t mirror_flags; /* misc flags */ char label[64]; /* filesystem space label */ char snapshots[64]; /* softlink dir for pruning */ int32_t reserved02; /* was prune_{time,freq} */ int32_t reserved03; /* was reblock_{time,freq} */ int32_t reserved04; /* was snapshot_freq */ int32_t prune_min; /* do not prune recent history */ int32_t prune_max; /* do not retain history beyond here */ int32_t reserved[16]; } __packed; typedef struct hammer_pseudofs_data *hammer_pseudofs_data_t; #define HAMMER_PFSD_SLAVE 0x00000001 #define HAMMER_PFSD_DELETED 0x80000000 #define hammer_is_pfs_slave(pfsd) \ (((pfsd)->mirror_flags & HAMMER_PFSD_SLAVE) != 0) #define hammer_is_pfs_master(pfsd) \ (!hammer_is_pfs_slave(pfsd)) #define hammer_is_pfs_deleted(pfsd) \ (((pfsd)->mirror_flags & HAMMER_PFSD_DELETED) != 0) #define HAMMER_MAX_PFS 65536 #define HAMMER_MAX_PFSID (HAMMER_MAX_PFS - 1) #define HAMMER_ROOT_PFSID 0 /* * Snapshot meta-data { Objid = HAMMER_OBJID_ROOT, Key = tid, rectype = SNAPSHOT }. * * Snapshot records replace the old <fs>/snapshots/<softlink> methodology. Snapshot * records are mirrored but may be independently managed once they are laid down on * a slave. * * NOTE: The b-tree key is signed, the tid is not, so callers must still sort the * results. * * NOTE: Reserved fields must be zero (as usual) */ typedef struct hammer_snapshot_data { hammer_tid_t tid; /* the snapshot TID itself (== key) */ uint64_t ts; /* real-time when snapshot was made */ uint64_t reserved01; uint64_t reserved02; char label[64]; /* user-supplied description */ uint64_t reserved03[4]; } *hammer_snapshot_data_t; /* * Config meta-data { ObjId = HAMMER_OBJID_ROOT, Key = 0, rectype = CONFIG }. * * Used to store the hammer cleanup config. This data is not mirrored. */ typedef struct hammer_config_data { char text[1024]; } *hammer_config_data_t; /* * Rollup various structures embedded as record data */ typedef union hammer_data_ondisk { struct hammer_direntry_data entry; struct hammer_inode_data inode; struct hammer_symlink_data symlink; struct hammer_pseudofs_data pfsd; struct hammer_snapshot_data snap; struct hammer_config_data config; } *hammer_data_ondisk_t; /* * Ondisk layout of B-Tree related structures */ #if 0 /* Not needed for fstype(8) */ #include "hammer_btree.h" #endif #define HAMMER_DIR_INODE_LOCALIZATION(ino_data) \ (((ino_data)->cap_flags & HAMMER_INODE_CAP_DIR_LOCAL_INO) ? \ HAMMER_LOCALIZE_INODE : \ HAMMER_LOCALIZE_MISC) #endif /* !VFS_HAMMER_DISK_H_ */
