+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* 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 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would 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 the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_FORMAT_H__
#define __XFS_FORMAT_H__
XFS_SB_VERSION2_PROJID32BIT | \
XFS_SB_VERSION2_FTYPE)
+/* Maximum size of the xfs filesystem label, no terminating NULL */
+#define XFSLABEL_MAX 12
+
/*
* Superblock - in core version. Must match the ondisk version below.
* Must be padded to 64 bit alignment.
*/
typedef struct xfs_sb {
- __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
- __uint32_t sb_blocksize; /* logical block size, bytes */
+ uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
+ uint32_t sb_blocksize; /* logical block size, bytes */
xfs_rfsblock_t sb_dblocks; /* number of data blocks */
xfs_rfsblock_t sb_rblocks; /* number of realtime blocks */
xfs_rtblock_t sb_rextents; /* number of realtime extents */
xfs_agnumber_t sb_agcount; /* number of allocation groups */
xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
xfs_extlen_t sb_logblocks; /* number of log blocks */
- __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
- __uint16_t sb_sectsize; /* volume sector size, bytes */
- __uint16_t sb_inodesize; /* inode size, bytes */
- __uint16_t sb_inopblock; /* inodes per block */
- char sb_fname[12]; /* file system name */
- __uint8_t sb_blocklog; /* log2 of sb_blocksize */
- __uint8_t sb_sectlog; /* log2 of sb_sectsize */
- __uint8_t sb_inodelog; /* log2 of sb_inodesize */
- __uint8_t sb_inopblog; /* log2 of sb_inopblock */
- __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
- __uint8_t sb_rextslog; /* log2 of sb_rextents */
- __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
- __uint8_t sb_imax_pct; /* max % of fs for inode space */
+ uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
+ uint16_t sb_sectsize; /* volume sector size, bytes */
+ uint16_t sb_inodesize; /* inode size, bytes */
+ uint16_t sb_inopblock; /* inodes per block */
+ char sb_fname[XFSLABEL_MAX]; /* file system name */
+ uint8_t sb_blocklog; /* log2 of sb_blocksize */
+ uint8_t sb_sectlog; /* log2 of sb_sectsize */
+ uint8_t sb_inodelog; /* log2 of sb_inodesize */
+ uint8_t sb_inopblog; /* log2 of sb_inopblock */
+ uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
+ uint8_t sb_rextslog; /* log2 of sb_rextents */
+ uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
+ uint8_t sb_imax_pct; /* max % of fs for inode space */
/* statistics */
/*
* These fields must remain contiguous. If you really
* want to change their layout, make sure you fix the
* code in xfs_trans_apply_sb_deltas().
*/
- __uint64_t sb_icount; /* allocated inodes */
- __uint64_t sb_ifree; /* free inodes */
- __uint64_t sb_fdblocks; /* free data blocks */
- __uint64_t sb_frextents; /* free realtime extents */
+ uint64_t sb_icount; /* allocated inodes */
+ uint64_t sb_ifree; /* free inodes */
+ uint64_t sb_fdblocks; /* free data blocks */
+ uint64_t sb_frextents; /* free realtime extents */
/*
* End contiguous fields.
*/
xfs_ino_t sb_uquotino; /* user quota inode */
xfs_ino_t sb_gquotino; /* group quota inode */
- __uint16_t sb_qflags; /* quota flags */
- __uint8_t sb_flags; /* misc. flags */
- __uint8_t sb_shared_vn; /* shared version number */
+ uint16_t sb_qflags; /* quota flags */
+ uint8_t sb_flags; /* misc. flags */
+ uint8_t sb_shared_vn; /* shared version number */
xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
- __uint32_t sb_unit; /* stripe or raid unit */
- __uint32_t sb_width; /* stripe or raid width */
- __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
- __uint8_t sb_logsectlog; /* log2 of the log sector size */
- __uint16_t sb_logsectsize; /* sector size for the log, bytes */
- __uint32_t sb_logsunit; /* stripe unit size for the log */
- __uint32_t sb_features2; /* additional feature bits */
+ uint32_t sb_unit; /* stripe or raid unit */
+ uint32_t sb_width; /* stripe or raid width */
+ uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
+ uint8_t sb_logsectlog; /* log2 of the log sector size */
+ uint16_t sb_logsectsize; /* sector size for the log, bytes */
+ uint32_t sb_logsunit; /* stripe unit size for the log */
+ uint32_t sb_features2; /* additional feature bits */
/*
* bad features2 field as a result of failing to pad the sb structure to
* the value in sb_features2 when formatting the incore superblock to
* the disk buffer.
*/
- __uint32_t sb_bad_features2;
+ uint32_t sb_bad_features2;
/* version 5 superblock fields start here */
/* feature masks */
- __uint32_t sb_features_compat;
- __uint32_t sb_features_ro_compat;
- __uint32_t sb_features_incompat;
- __uint32_t sb_features_log_incompat;
+ uint32_t sb_features_compat;
+ uint32_t sb_features_ro_compat;
+ uint32_t sb_features_incompat;
+ uint32_t sb_features_log_incompat;
- __uint32_t sb_crc; /* superblock crc */
+ uint32_t sb_crc; /* superblock crc */
xfs_extlen_t sb_spino_align; /* sparse inode chunk alignment */
xfs_ino_t sb_pquotino; /* project quota inode */
__be16 sb_sectsize; /* volume sector size, bytes */
__be16 sb_inodesize; /* inode size, bytes */
__be16 sb_inopblock; /* inodes per block */
- char sb_fname[12]; /* file system name */
+ char sb_fname[XFSLABEL_MAX]; /* file system name */
__u8 sb_blocklog; /* log2 of sb_blocksize */
__u8 sb_sectlog; /* log2 of sb_sectsize */
__u8 sb_inodelog; /* log2 of sb_inodesize */
return false;
}
+static inline bool xfs_sb_version_hasrealtime(struct xfs_sb *sbp)
+{
+ return sbp->sb_rblocks > 0;
+}
+
/*
* Detect a mismatched features2 field. Older kernels read/wrote
* this into the wrong slot, so to be safe we keep them in sync.
static inline bool
xfs_sb_has_compat_feature(
struct xfs_sb *sbp,
- __uint32_t feature)
+ uint32_t feature)
{
return (sbp->sb_features_compat & feature) != 0;
}
#define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */
#define XFS_SB_FEAT_RO_COMPAT_RMAPBT (1 << 1) /* reverse map btree */
+#define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */
#define XFS_SB_FEAT_RO_COMPAT_ALL \
- (XFS_SB_FEAT_RO_COMPAT_FINOBT)
+ (XFS_SB_FEAT_RO_COMPAT_FINOBT | \
+ XFS_SB_FEAT_RO_COMPAT_RMAPBT | \
+ XFS_SB_FEAT_RO_COMPAT_REFLINK)
#define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
static inline bool
xfs_sb_has_ro_compat_feature(
struct xfs_sb *sbp,
- __uint32_t feature)
+ uint32_t feature)
{
return (sbp->sb_features_ro_compat & feature) != 0;
}
#define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
#define XFS_SB_FEAT_INCOMPAT_SPINODES (1 << 1) /* sparse inode chunks */
#define XFS_SB_FEAT_INCOMPAT_META_UUID (1 << 2) /* metadata UUID */
-
#define XFS_SB_FEAT_INCOMPAT_ALL \
(XFS_SB_FEAT_INCOMPAT_FTYPE| \
XFS_SB_FEAT_INCOMPAT_SPINODES| \
static inline bool
xfs_sb_has_incompat_feature(
struct xfs_sb *sbp,
- __uint32_t feature)
+ uint32_t feature)
{
return (sbp->sb_features_incompat & feature) != 0;
}
static inline bool
xfs_sb_has_incompat_log_feature(
struct xfs_sb *sbp,
- __uint32_t feature)
+ uint32_t feature)
{
return (sbp->sb_features_log_incompat & feature) != 0;
}
/*
* V5 superblock specific feature checks
*/
-static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp)
+static inline bool xfs_sb_version_hascrc(struct xfs_sb *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
-static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp)
+static inline bool xfs_sb_version_has_pquotino(struct xfs_sb *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
(sbp->sb_features2 & XFS_SB_VERSION2_FTYPE));
}
-static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasfinobt(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) &&
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT);
* user-visible UUID to be changed on V5 filesystems which have a
* filesystem UUID stamped into every piece of metadata.
*/
-static inline int xfs_sb_version_hasmetauuid(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasmetauuid(struct xfs_sb *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) &&
(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID);
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT);
}
+static inline bool xfs_sb_version_hasreflink(struct xfs_sb *sbp)
+{
+ return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
+ (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK);
+}
+
/*
* end of superblock version macros
*/
*/
#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSB(mp,b) \
- ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
-#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
+ ((((uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
+#define XFS_B_TO_FSBT(mp,b) (((uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
/*
__be32 agf_btreeblks; /* # of blocks held in AGF btrees */
uuid_t agf_uuid; /* uuid of filesystem */
+ __be32 agf_rmap_blocks; /* rmapbt blocks used */
+ __be32 agf_refcount_blocks; /* refcountbt blocks used */
+
+ __be32 agf_refcount_root; /* refcount tree root block */
+ __be32 agf_refcount_level; /* refcount btree levels */
+
/*
* reserve some contiguous space for future logged fields before we add
* the unlogged fields. This makes the range logging via flags and
* structure offsets much simpler.
*/
- __be64 agf_spare64[16];
+ __be64 agf_spare64[14];
/* unlogged fields, written during buffer writeback. */
__be64 agf_lsn; /* last write sequence */
#define XFS_AGF_LONGEST 0x00000400
#define XFS_AGF_BTREEBLKS 0x00000800
#define XFS_AGF_UUID 0x00001000
-#define XFS_AGF_NUM_BITS 13
+#define XFS_AGF_RMAP_BLOCKS 0x00002000
+#define XFS_AGF_REFCOUNT_BLOCKS 0x00004000
+#define XFS_AGF_REFCOUNT_ROOT 0x00008000
+#define XFS_AGF_REFCOUNT_LEVEL 0x00010000
+#define XFS_AGF_SPARE64 0x00020000
+#define XFS_AGF_NUM_BITS 18
#define XFS_AGF_ALL_BITS ((1 << XFS_AGF_NUM_BITS) - 1)
#define XFS_AGF_FLAGS \
{ XFS_AGF_FREEBLKS, "FREEBLKS" }, \
{ XFS_AGF_LONGEST, "LONGEST" }, \
{ XFS_AGF_BTREEBLKS, "BTREEBLKS" }, \
- { XFS_AGF_UUID, "UUID" }
+ { XFS_AGF_UUID, "UUID" }, \
+ { XFS_AGF_RMAP_BLOCKS, "RMAP_BLOCKS" }, \
+ { XFS_AGF_REFCOUNT_BLOCKS, "REFCOUNT_BLOCKS" }, \
+ { XFS_AGF_REFCOUNT_ROOT, "REFCOUNT_ROOT" }, \
+ { XFS_AGF_REFCOUNT_LEVEL, "REFCOUNT_LEVEL" }, \
+ { XFS_AGF_SPARE64, "SPARE64" }
/* disk block (xfs_daddr_t) in the AG */
#define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log))
&(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
(__be32 *)(bp)->b_addr)
-/*
- * Size of the AGFL. For CRC-enabled filesystes we steal a couple of
- * slots in the beginning of the block for a proper header with the
- * location information and CRC.
- */
-#define XFS_AGFL_SIZE(mp) \
- (((mp)->m_sb.sb_sectsize - \
- (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
- sizeof(struct xfs_agfl) : 0)) / \
- sizeof(xfs_agblock_t))
-
typedef struct xfs_agfl {
__be32 agfl_magicnum;
__be32 agfl_seqno;
uuid_t agfl_uuid;
__be64 agfl_lsn;
__be32 agfl_crc;
- __be32 agfl_bno[]; /* actually XFS_AGFL_SIZE(mp) */
+ __be32 agfl_bno[]; /* actually xfs_agfl_size(mp) */
} __attribute__((packed)) xfs_agfl_t;
#define XFS_AGFL_CRC_OFF offsetof(struct xfs_agfl, agfl_crc)
__be64 di_changecount; /* number of attribute changes */
__be64 di_lsn; /* flush sequence */
__be64 di_flags2; /* more random flags */
- __u8 di_pad2[16]; /* more padding for future expansion */
+ __be32 di_cowextsize; /* basic cow extent size for file */
+ __u8 di_pad2[12]; /* more padding for future expansion */
/* fields only written to during inode creation */
xfs_timestamp_t di_crtime; /* time created */
/*
* The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
* Since the pathconf interface is signed, we use 2^31 - 1 instead.
- * The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
*/
#define XFS_MAXLINK ((1U << 31) - 1U)
-#define XFS_MAXLINK_1 65535U
/*
* Values for di_format
XFS_DINODE_FMT_LOCAL, /* bulk data */
XFS_DINODE_FMT_EXTENTS, /* struct xfs_bmbt_rec */
XFS_DINODE_FMT_BTREE, /* struct xfs_bmdr_block */
- XFS_DINODE_FMT_UUID /* uuid_t */
+ XFS_DINODE_FMT_UUID /* added long ago, but never used */
} xfs_dinode_fmt_t;
/*
XFS_DFORK_DSIZE(dip, mp) : \
XFS_DFORK_ASIZE(dip, mp))
+#define XFS_DFORK_MAXEXT(dip, mp, w) \
+ (XFS_DFORK_SIZE(dip, mp, w) / sizeof(struct xfs_bmbt_rec))
+
/*
* Return pointers to the data or attribute forks.
*/
* 16 bits of the XFS_XFLAG_s range.
*/
#define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */
+#define XFS_DIFLAG2_REFLINK_BIT 1 /* file's blocks may be shared */
+#define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */
#define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT)
+#define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT)
+#define XFS_DIFLAG2_COWEXTSIZE (1 << XFS_DIFLAG2_COWEXTSIZE_BIT)
-#define XFS_DIFLAG2_ANY (XFS_DIFLAG2_DAX)
+#define XFS_DIFLAG2_ANY \
+ (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE)
/*
* Inode number format:
* next agno_log bits - ag number
* high agno_log-agblklog-inopblog bits - 0
*/
-#define XFS_INO_MASK(k) (__uint32_t)((1ULL << (k)) - 1)
+#define XFS_INO_MASK(k) (uint32_t)((1ULL << (k)) - 1)
#define XFS_INO_OFFSET_BITS(mp) (mp)->m_sb.sb_inopblog
#define XFS_INO_AGBNO_BITS(mp) (mp)->m_sb.sb_agblklog
#define XFS_INO_AGINO_BITS(mp) (mp)->m_agino_log
* Dquot and dquot block format definitions
*/
#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */
-#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */
+#define XFS_DQUOT_VERSION (uint8_t)0x01 /* latest version number */
/*
* This is the main portion of the on-disk representation of quota
#define XFS_SYMLINK_CRC_OFF offsetof(struct xfs_dsymlink_hdr, sl_crc)
+#define XFS_SYMLINK_MAXLEN 1024
/*
* The maximum pathlen is 1024 bytes. Since the minimum file system
* blocksize is 512 bytes, we can get a max of 3 extents back from
#define XFS_FIBT_MAGIC 0x46494254 /* 'FIBT' */
#define XFS_FIBT_CRC_MAGIC 0x46494233 /* 'FIB3' */
-typedef __uint64_t xfs_inofree_t;
+typedef uint64_t xfs_inofree_t;
#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3)
#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
#define XFS_INOBT_HOLEMASK_FULL 0 /* holemask for full chunk */
-#define XFS_INOBT_HOLEMASK_BITS (NBBY * sizeof(__uint16_t))
+#define XFS_INOBT_HOLEMASK_BITS (NBBY * sizeof(uint16_t))
#define XFS_INODES_PER_HOLEMASK_BIT \
- (XFS_INODES_PER_CHUNK / (NBBY * sizeof(__uint16_t)))
+ (XFS_INODES_PER_CHUNK / (NBBY * sizeof(uint16_t)))
static inline xfs_inofree_t xfs_inobt_maskn(int i, int n)
{
typedef struct xfs_inobt_rec_incore {
xfs_agino_t ir_startino; /* starting inode number */
- __uint16_t ir_holemask; /* hole mask for sparse chunks */
- __uint8_t ir_count; /* total inode count */
- __uint8_t ir_freecount; /* count of free inodes (set bits) */
+ uint16_t ir_holemask; /* hole mask for sparse chunks */
+ uint8_t ir_count; /* total inode count */
+ uint8_t ir_freecount; /* count of free inodes (set bits) */
xfs_inofree_t ir_free; /* free inode mask */
} xfs_inobt_rec_incore_t;
#define XFS_RMAP_CRC_MAGIC 0x524d4233 /* 'RMB3' */
/*
- * The first data block of an AG depends on whether the filesystem was formatted
- * with the finobt feature. If so, account for the finobt reserved root btree
- * block.
+ * Ownership info for an extent. This is used to create reverse-mapping
+ * entries.
*/
-#define XFS_PREALLOC_BLOCKS(mp) \
+#define XFS_OWNER_INFO_ATTR_FORK (1 << 0)
+#define XFS_OWNER_INFO_BMBT_BLOCK (1 << 1)
+struct xfs_owner_info {
+ uint64_t oi_owner;
+ xfs_fileoff_t oi_offset;
+ unsigned int oi_flags;
+};
+
+/*
+ * Special owner types.
+ *
+ * Seeing as we only support up to 8EB, we have the upper bit of the owner field
+ * to tell us we have a special owner value. We use these for static metadata
+ * allocated at mkfs/growfs time, as well as for freespace management metadata.
+ */
+#define XFS_RMAP_OWN_NULL (-1ULL) /* No owner, for growfs */
+#define XFS_RMAP_OWN_UNKNOWN (-2ULL) /* Unknown owner, for EFI recovery */
+#define XFS_RMAP_OWN_FS (-3ULL) /* static fs metadata */
+#define XFS_RMAP_OWN_LOG (-4ULL) /* static fs metadata */
+#define XFS_RMAP_OWN_AG (-5ULL) /* AG freespace btree blocks */
+#define XFS_RMAP_OWN_INOBT (-6ULL) /* Inode btree blocks */
+#define XFS_RMAP_OWN_INODES (-7ULL) /* Inode chunk */
+#define XFS_RMAP_OWN_REFC (-8ULL) /* refcount tree */
+#define XFS_RMAP_OWN_COW (-9ULL) /* cow allocations */
+#define XFS_RMAP_OWN_MIN (-10ULL) /* guard */
+
+#define XFS_RMAP_NON_INODE_OWNER(owner) (!!((owner) & (1ULL << 63)))
+
+/*
+ * Data record structure
+ */
+struct xfs_rmap_rec {
+ __be32 rm_startblock; /* extent start block */
+ __be32 rm_blockcount; /* extent length */
+ __be64 rm_owner; /* extent owner */
+ __be64 rm_offset; /* offset within the owner */
+};
+
+/*
+ * rmap btree record
+ * rm_offset:63 is the attribute fork flag
+ * rm_offset:62 is the bmbt block flag
+ * rm_offset:61 is the unwritten extent flag (same as l0:63 in bmbt)
+ * rm_offset:54-60 aren't used and should be zero
+ * rm_offset:0-53 is the block offset within the inode
+ */
+#define XFS_RMAP_OFF_ATTR_FORK ((uint64_t)1ULL << 63)
+#define XFS_RMAP_OFF_BMBT_BLOCK ((uint64_t)1ULL << 62)
+#define XFS_RMAP_OFF_UNWRITTEN ((uint64_t)1ULL << 61)
+
+#define XFS_RMAP_LEN_MAX ((uint32_t)~0U)
+#define XFS_RMAP_OFF_FLAGS (XFS_RMAP_OFF_ATTR_FORK | \
+ XFS_RMAP_OFF_BMBT_BLOCK | \
+ XFS_RMAP_OFF_UNWRITTEN)
+#define XFS_RMAP_OFF_MASK ((uint64_t)0x3FFFFFFFFFFFFFULL)
+
+#define XFS_RMAP_OFF(off) ((off) & XFS_RMAP_OFF_MASK)
+
+#define XFS_RMAP_IS_BMBT_BLOCK(off) (!!((off) & XFS_RMAP_OFF_BMBT_BLOCK))
+#define XFS_RMAP_IS_ATTR_FORK(off) (!!((off) & XFS_RMAP_OFF_ATTR_FORK))
+#define XFS_RMAP_IS_UNWRITTEN(len) (!!((off) & XFS_RMAP_OFF_UNWRITTEN))
+
+#define RMAPBT_STARTBLOCK_BITLEN 32
+#define RMAPBT_BLOCKCOUNT_BITLEN 32
+#define RMAPBT_OWNER_BITLEN 64
+#define RMAPBT_ATTRFLAG_BITLEN 1
+#define RMAPBT_BMBTFLAG_BITLEN 1
+#define RMAPBT_EXNTFLAG_BITLEN 1
+#define RMAPBT_UNUSED_OFFSET_BITLEN 7
+#define RMAPBT_OFFSET_BITLEN 54
+
+#define XFS_RMAP_ATTR_FORK (1 << 0)
+#define XFS_RMAP_BMBT_BLOCK (1 << 1)
+#define XFS_RMAP_UNWRITTEN (1 << 2)
+#define XFS_RMAP_KEY_FLAGS (XFS_RMAP_ATTR_FORK | \
+ XFS_RMAP_BMBT_BLOCK)
+#define XFS_RMAP_REC_FLAGS (XFS_RMAP_UNWRITTEN)
+struct xfs_rmap_irec {
+ xfs_agblock_t rm_startblock; /* extent start block */
+ xfs_extlen_t rm_blockcount; /* extent length */
+ uint64_t rm_owner; /* extent owner */
+ uint64_t rm_offset; /* offset within the owner */
+ unsigned int rm_flags; /* state flags */
+};
+
+/*
+ * Key structure
+ *
+ * We don't use the length for lookups
+ */
+struct xfs_rmap_key {
+ __be32 rm_startblock; /* extent start block */
+ __be64 rm_owner; /* extent owner */
+ __be64 rm_offset; /* offset within the owner */
+} __attribute__((packed));
+
+/* btree pointer type */
+typedef __be32 xfs_rmap_ptr_t;
+
+#define XFS_RMAP_BLOCK(mp) \
(xfs_sb_version_hasfinobt(&((mp)->m_sb)) ? \
XFS_FIBT_BLOCK(mp) + 1 : \
XFS_IBT_BLOCK(mp) + 1)
+/*
+ * Reference Count Btree format definitions
+ *
+ */
+#define XFS_REFC_CRC_MAGIC 0x52334643 /* 'R3FC' */
+
+unsigned int xfs_refc_block(struct xfs_mount *mp);
+
+/*
+ * Data record/key structure
+ *
+ * Each record associates a range of physical blocks (starting at
+ * rc_startblock and ending rc_blockcount blocks later) with a reference
+ * count (rc_refcount). Extents that are being used to stage a copy on
+ * write (CoW) operation are recorded in the refcount btree with a
+ * refcount of 1. All other records must have a refcount > 1 and must
+ * track an extent mapped only by file data forks.
+ *
+ * Extents with a single owner (attributes, metadata, non-shared file
+ * data) are not tracked here. Free space is also not tracked here.
+ * This is consistent with pre-reflink XFS.
+ */
+
+/*
+ * Extents that are being used to stage a copy on write are stored
+ * in the refcount btree with a refcount of 1 and the upper bit set
+ * on the startblock. This speeds up mount time deletion of stale
+ * staging extents because they're all at the right side of the tree.
+ */
+#define XFS_REFC_COW_START ((xfs_agblock_t)(1U << 31))
+#define REFCNTBT_COWFLAG_BITLEN 1
+#define REFCNTBT_AGBLOCK_BITLEN 31
+
+struct xfs_refcount_rec {
+ __be32 rc_startblock; /* starting block number */
+ __be32 rc_blockcount; /* count of blocks */
+ __be32 rc_refcount; /* number of inodes linked here */
+};
+
+struct xfs_refcount_key {
+ __be32 rc_startblock; /* starting block number */
+};
+
+struct xfs_refcount_irec {
+ xfs_agblock_t rc_startblock; /* starting block number */
+ xfs_extlen_t rc_blockcount; /* count of free blocks */
+ xfs_nlink_t rc_refcount; /* number of inodes linked here */
+};
+
+#define MAXREFCOUNT ((xfs_nlink_t)~0U)
+#define MAXREFCEXTLEN ((xfs_extlen_t)~0U)
+
+/* btree pointer type */
+typedef __be32 xfs_refcount_ptr_t;
/*
#define BMBT_STARTBLOCK_BITLEN 52
#define BMBT_BLOCKCOUNT_BITLEN 21
+#define BMBT_STARTOFF_MASK ((1ULL << BMBT_STARTOFF_BITLEN) - 1)
+
typedef struct xfs_bmbt_rec {
__be64 l0, l1;
} xfs_bmbt_rec_t;
-typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
+typedef uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
typedef xfs_bmbt_rec_t xfs_bmdr_rec_t;
-typedef struct xfs_bmbt_rec_host {
- __uint64_t l0, l1;
-} xfs_bmbt_rec_host_t;
-
/*
* Values and macros for delayed-allocation startblock fields.
*/
return (xfs_filblks_t)((x) & ~STARTBLOCKMASK);
}
-/*
- * Possible extent formats.
- */
-typedef enum {
- XFS_EXTFMT_NOSTATE = 0,
- XFS_EXTFMT_HASSTATE
-} xfs_exntfmt_t;
-
-/*
- * Possible extent states.
- */
-typedef enum {
- XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
- XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID
-} xfs_exntst_t;
-
-/*
- * Incore version of above.
- */
-typedef struct xfs_bmbt_irec
-{
- xfs_fileoff_t br_startoff; /* starting file offset */
- xfs_fsblock_t br_startblock; /* starting block number */
- xfs_filblks_t br_blockcount; /* number of blocks */
- xfs_exntst_t br_state; /* extent state */
-} xfs_bmbt_irec_t;
-
/*
* Key structure for non-leaf levels of the tree.
*/
projects / thirdparty / xfsprogs-dev.git / blobdiff