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Diffstat (limited to '')
| -rw-r--r-- | fs/xfs/libxfs/xfs_shared.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h new file mode 100644 index 000000000..1c5debe74 --- /dev/null +++ b/fs/xfs/libxfs/xfs_shared.h @@ -0,0 +1,137 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2000-2005 Silicon Graphics, Inc. + * Copyright (c) 2013 Red Hat, Inc. + * All Rights Reserved. + */ +#ifndef __XFS_SHARED_H__ +#define __XFS_SHARED_H__ + +/* + * Definitions shared between kernel and userspace that don't fit into any other + * header file that is shared with userspace. + */ +struct xfs_ifork; +struct xfs_buf; +struct xfs_buf_ops; +struct xfs_mount; +struct xfs_trans; +struct xfs_inode; + +/* + * Buffer verifier operations are widely used, including userspace tools + */ +extern const struct xfs_buf_ops xfs_agf_buf_ops; +extern const struct xfs_buf_ops xfs_agi_buf_ops; +extern const struct xfs_buf_ops xfs_agf_buf_ops; +extern const struct xfs_buf_ops xfs_agfl_buf_ops; +extern const struct xfs_buf_ops xfs_allocbt_buf_ops; +extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; +extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; +extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; +extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; +extern const struct xfs_buf_ops xfs_bmbt_buf_ops; +extern const struct xfs_buf_ops xfs_da3_node_buf_ops; +extern const struct xfs_buf_ops xfs_dquot_buf_ops; +extern const struct xfs_buf_ops xfs_symlink_buf_ops; +extern const struct xfs_buf_ops xfs_agi_buf_ops; +extern const struct xfs_buf_ops xfs_inobt_buf_ops; +extern const struct xfs_buf_ops xfs_inode_buf_ops; +extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; +extern const struct xfs_buf_ops xfs_dquot_buf_ops; +extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; +extern const struct xfs_buf_ops xfs_sb_buf_ops; +extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; +extern const struct xfs_buf_ops xfs_symlink_buf_ops; +extern const struct xfs_buf_ops xfs_rtbuf_ops; + +/* log size calculation functions */ +int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); +int xfs_log_calc_minimum_size(struct xfs_mount *); + +struct xfs_trans_res; +void xfs_log_get_max_trans_res(struct xfs_mount *mp, + struct xfs_trans_res *max_resp); + +/* + * Values for t_flags. + */ +#define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ +#define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ +#define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ +#define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ +#define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */ +#define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ +#define XFS_TRANS_NO_WRITECOUNT 0x40 /* do not elevate SB writecount */ +#define XFS_TRANS_NOFS 0x80 /* pass KM_NOFS to kmem_alloc */ +/* + * LOWMODE is used by the allocator to activate the lowspace algorithm - when + * free space is running low the extent allocator may choose to allocate an + * extent from an AG without leaving sufficient space for a btree split when + * inserting the new extent. In this case the allocator will enable the + * lowspace algorithm which is supposed to allow further allocations (such as + * btree splits and newroots) to allocate from sequential AGs. In order to + * avoid locking AGs out of order the lowspace algorithm will start searching + * for free space from AG 0. If the correct transaction reservations have been + * made then this algorithm will eventually find all the space it needs. + */ +#define XFS_TRANS_LOWMODE 0x100 /* allocate in low space mode */ + +/* + * Field values for xfs_trans_mod_sb. + */ +#define XFS_TRANS_SB_ICOUNT 0x00000001 +#define XFS_TRANS_SB_IFREE 0x00000002 +#define XFS_TRANS_SB_FDBLOCKS 0x00000004 +#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 +#define XFS_TRANS_SB_FREXTENTS 0x00000010 +#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 +#define XFS_TRANS_SB_DBLOCKS 0x00000040 +#define XFS_TRANS_SB_AGCOUNT 0x00000080 +#define XFS_TRANS_SB_IMAXPCT 0x00000100 +#define XFS_TRANS_SB_REXTSIZE 0x00000200 +#define XFS_TRANS_SB_RBMBLOCKS 0x00000400 +#define XFS_TRANS_SB_RBLOCKS 0x00000800 +#define XFS_TRANS_SB_REXTENTS 0x00001000 +#define XFS_TRANS_SB_REXTSLOG 0x00002000 + +/* + * Here we centralize the specification of XFS meta-data buffer reference count + * values. This determines how hard the buffer cache tries to hold onto the + * buffer. + */ +#define XFS_AGF_REF 4 +#define XFS_AGI_REF 4 +#define XFS_AGFL_REF 3 +#define XFS_INO_BTREE_REF 3 +#define XFS_ALLOC_BTREE_REF 2 +#define XFS_BMAP_BTREE_REF 2 +#define XFS_RMAP_BTREE_REF 2 +#define XFS_DIR_BTREE_REF 2 +#define XFS_INO_REF 2 +#define XFS_ATTR_BTREE_REF 1 +#define XFS_DQUOT_REF 1 +#define XFS_REFC_BTREE_REF 1 +#define XFS_SSB_REF 0 + +/* + * Flags for xfs_trans_ichgtime(). + */ +#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ +#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ +#define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ + + +/* + * Symlink decoding/encoding functions + */ +int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); +int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, + uint32_t size, struct xfs_buf *bp); +bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, + uint32_t size, struct xfs_buf *bp); +void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, + struct xfs_inode *ip, struct xfs_ifork *ifp); +xfs_failaddr_t xfs_symlink_shortform_verify(struct xfs_inode *ip); + +#endif /* __XFS_SHARED_H__ */ |