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2d5f216b77
Further disambiguate the xfs_rtblock_t uses by creating a new type, xfs_rtxnum_t, to store the position of an extent within the realtime section, in units of rtextents. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_RTALLOC_H__
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#define __XFS_RTALLOC_H__
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/* kernel only definitions and functions */
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struct xfs_mount;
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struct xfs_trans;
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#ifdef CONFIG_XFS_RT
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/*
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* Function prototypes for exported functions.
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*/
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/*
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* Allocate an extent in the realtime subvolume, with the usual allocation
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* parameters. The length units are all in realtime extents, as is the
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* result block number.
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*/
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int /* error */
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xfs_rtallocate_extent(
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struct xfs_trans *tp, /* transaction pointer */
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xfs_rtxnum_t start, /* starting rtext number to allocate */
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xfs_rtxlen_t minlen, /* minimum length to allocate */
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xfs_rtxlen_t maxlen, /* maximum length to allocate */
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xfs_rtxlen_t *len, /* out: actual length allocated */
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int wasdel, /* was a delayed allocation extent */
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xfs_rtxlen_t prod, /* extent product factor */
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xfs_rtxnum_t *rtblock); /* out: start rtext allocated */
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/*
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* Initialize realtime fields in the mount structure.
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*/
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int /* error */
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xfs_rtmount_init(
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struct xfs_mount *mp); /* file system mount structure */
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void
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xfs_rtunmount_inodes(
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struct xfs_mount *mp);
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/*
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* Get the bitmap and summary inodes into the mount structure
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* at mount time.
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*/
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int /* error */
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xfs_rtmount_inodes(
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struct xfs_mount *mp); /* file system mount structure */
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/*
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* Pick an extent for allocation at the start of a new realtime file.
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* Use the sequence number stored in the atime field of the bitmap inode.
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* Translate this to a fraction of the rtextents, and return the product
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* of rtextents and the fraction.
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* The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
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*/
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int /* error */
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xfs_rtpick_extent(
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struct xfs_mount *mp, /* file system mount point */
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struct xfs_trans *tp, /* transaction pointer */
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xfs_rtxlen_t len, /* allocation length (rtextents) */
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xfs_rtxnum_t *pick); /* result rt extent */
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/*
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* Grow the realtime area of the filesystem.
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*/
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int
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xfs_growfs_rt(
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struct xfs_mount *mp, /* file system mount structure */
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xfs_growfs_rt_t *in); /* user supplied growfs struct */
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int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp);
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#else
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# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (-ENOSYS)
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# define xfs_rtpick_extent(m,t,l,rb) (-ENOSYS)
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# define xfs_growfs_rt(mp,in) (-ENOSYS)
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# define xfs_rtalloc_reinit_frextents(m) (0)
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static inline int /* error */
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xfs_rtmount_init(
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xfs_mount_t *mp) /* file system mount structure */
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{
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if (mp->m_sb.sb_rblocks == 0)
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return 0;
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xfs_warn(mp, "Not built with CONFIG_XFS_RT");
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return -ENOSYS;
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}
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# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (-ENOSYS))
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# define xfs_rtunmount_inodes(m)
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#endif /* CONFIG_XFS_RT */
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#endif /* __XFS_RTALLOC_H__ */
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