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183 lines
6.5 KiB
183 lines
6.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (c) 2000-2005 Silicon Graphics, Inc. |
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* Copyright (c) 2013 Red Hat, Inc. |
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* All Rights Reserved. |
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*/ |
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#ifndef __XFS_SHARED_H__ |
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#define __XFS_SHARED_H__ |
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/* |
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* Definitions shared between kernel and userspace that don't fit into any other |
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* header file that is shared with userspace. |
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*/ |
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struct xfs_ifork; |
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struct xfs_buf; |
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struct xfs_buf_ops; |
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struct xfs_mount; |
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struct xfs_trans; |
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struct xfs_inode; |
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/* |
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* Buffer verifier operations are widely used, including userspace tools |
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*/ |
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extern const struct xfs_buf_ops xfs_agf_buf_ops; |
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extern const struct xfs_buf_ops xfs_agi_buf_ops; |
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extern const struct xfs_buf_ops xfs_agf_buf_ops; |
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extern const struct xfs_buf_ops xfs_agfl_buf_ops; |
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extern const struct xfs_buf_ops xfs_bnobt_buf_ops; |
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extern const struct xfs_buf_ops xfs_cntbt_buf_ops; |
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extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; |
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extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; |
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extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; |
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extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; |
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extern const struct xfs_buf_ops xfs_bmbt_buf_ops; |
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extern const struct xfs_buf_ops xfs_da3_node_buf_ops; |
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extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
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extern const struct xfs_buf_ops xfs_symlink_buf_ops; |
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extern const struct xfs_buf_ops xfs_agi_buf_ops; |
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extern const struct xfs_buf_ops xfs_inobt_buf_ops; |
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extern const struct xfs_buf_ops xfs_finobt_buf_ops; |
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extern const struct xfs_buf_ops xfs_inode_buf_ops; |
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extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; |
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extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
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extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; |
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extern const struct xfs_buf_ops xfs_sb_buf_ops; |
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extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; |
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extern const struct xfs_buf_ops xfs_symlink_buf_ops; |
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extern const struct xfs_buf_ops xfs_rtbuf_ops; |
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/* log size calculation functions */ |
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int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); |
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int xfs_log_calc_minimum_size(struct xfs_mount *); |
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struct xfs_trans_res; |
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void xfs_log_get_max_trans_res(struct xfs_mount *mp, |
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struct xfs_trans_res *max_resp); |
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/* |
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* Values for t_flags. |
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*/ |
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#define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ |
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#define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ |
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#define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ |
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#define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ |
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#define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ |
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#define XFS_TRANS_NO_WRITECOUNT 0x40 /* do not elevate SB writecount */ |
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#define XFS_TRANS_RES_FDBLKS 0x80 /* reserve newly freed blocks */ |
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/* |
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* LOWMODE is used by the allocator to activate the lowspace algorithm - when |
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* free space is running low the extent allocator may choose to allocate an |
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* extent from an AG without leaving sufficient space for a btree split when |
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* inserting the new extent. In this case the allocator will enable the |
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* lowspace algorithm which is supposed to allow further allocations (such as |
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* btree splits and newroots) to allocate from sequential AGs. In order to |
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* avoid locking AGs out of order the lowspace algorithm will start searching |
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* for free space from AG 0. If the correct transaction reservations have been |
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* made then this algorithm will eventually find all the space it needs. |
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*/ |
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#define XFS_TRANS_LOWMODE 0x100 /* allocate in low space mode */ |
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/* |
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* Field values for xfs_trans_mod_sb. |
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*/ |
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#define XFS_TRANS_SB_ICOUNT 0x00000001 |
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#define XFS_TRANS_SB_IFREE 0x00000002 |
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#define XFS_TRANS_SB_FDBLOCKS 0x00000004 |
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#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 |
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#define XFS_TRANS_SB_FREXTENTS 0x00000010 |
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#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 |
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#define XFS_TRANS_SB_DBLOCKS 0x00000040 |
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#define XFS_TRANS_SB_AGCOUNT 0x00000080 |
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#define XFS_TRANS_SB_IMAXPCT 0x00000100 |
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#define XFS_TRANS_SB_REXTSIZE 0x00000200 |
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#define XFS_TRANS_SB_RBMBLOCKS 0x00000400 |
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#define XFS_TRANS_SB_RBLOCKS 0x00000800 |
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#define XFS_TRANS_SB_REXTENTS 0x00001000 |
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#define XFS_TRANS_SB_REXTSLOG 0x00002000 |
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/* |
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* Here we centralize the specification of XFS meta-data buffer reference count |
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* values. This determines how hard the buffer cache tries to hold onto the |
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* buffer. |
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*/ |
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#define XFS_AGF_REF 4 |
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#define XFS_AGI_REF 4 |
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#define XFS_AGFL_REF 3 |
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#define XFS_INO_BTREE_REF 3 |
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#define XFS_ALLOC_BTREE_REF 2 |
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#define XFS_BMAP_BTREE_REF 2 |
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#define XFS_RMAP_BTREE_REF 2 |
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#define XFS_DIR_BTREE_REF 2 |
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#define XFS_INO_REF 2 |
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#define XFS_ATTR_BTREE_REF 1 |
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#define XFS_DQUOT_REF 1 |
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#define XFS_REFC_BTREE_REF 1 |
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#define XFS_SSB_REF 0 |
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/* |
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* Flags for xfs_trans_ichgtime(). |
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*/ |
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#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ |
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#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ |
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#define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ |
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/* |
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* Symlink decoding/encoding functions |
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*/ |
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int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); |
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int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, |
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uint32_t size, struct xfs_buf *bp); |
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bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, |
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uint32_t size, struct xfs_buf *bp); |
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void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, |
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struct xfs_inode *ip, struct xfs_ifork *ifp); |
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xfs_failaddr_t xfs_symlink_shortform_verify(struct xfs_inode *ip); |
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/* Computed inode geometry for the filesystem. */ |
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struct xfs_ino_geometry { |
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/* Maximum inode count in this filesystem. */ |
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uint64_t maxicount; |
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/* Actual inode cluster buffer size, in bytes. */ |
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unsigned int inode_cluster_size; |
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/* |
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* Desired inode cluster buffer size, in bytes. This value is not |
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* rounded up to at least one filesystem block, which is necessary for |
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* the sole purpose of validating sb_spino_align. Runtime code must |
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* only ever use inode_cluster_size. |
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*/ |
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unsigned int inode_cluster_size_raw; |
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/* Inode cluster sizes, adjusted to be at least 1 fsb. */ |
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unsigned int inodes_per_cluster; |
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unsigned int blocks_per_cluster; |
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/* Inode cluster alignment. */ |
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unsigned int cluster_align; |
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unsigned int cluster_align_inodes; |
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unsigned int inoalign_mask; /* mask sb_inoalignmt if used */ |
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unsigned int inobt_mxr[2]; /* max inobt btree records */ |
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unsigned int inobt_mnr[2]; /* min inobt btree records */ |
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unsigned int inobt_maxlevels; /* max inobt btree levels. */ |
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/* Size of inode allocations under normal operation. */ |
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unsigned int ialloc_inos; |
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unsigned int ialloc_blks; |
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/* Minimum inode blocks for a sparse allocation. */ |
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unsigned int ialloc_min_blks; |
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/* stripe unit inode alignment */ |
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unsigned int ialloc_align; |
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unsigned int agino_log; /* #bits for agino in inum */ |
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/* precomputed value for di_flags2 */ |
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uint64_t new_diflags2; |
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}; |
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#endif /* __XFS_SHARED_H__ */
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