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164 lines
5.6 KiB
164 lines
5.6 KiB
// 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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/* |
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* XXX: Most of the realtime allocation functions deal in units of realtime |
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* extents, not realtime blocks. This looks funny when paired with the type |
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* name and screams for a larger cleanup. |
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*/ |
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struct xfs_rtalloc_rec { |
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xfs_rtblock_t ar_startext; |
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xfs_rtblock_t ar_extcount; |
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}; |
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typedef int (*xfs_rtalloc_query_range_fn)( |
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struct xfs_mount *mp, |
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struct xfs_trans *tp, |
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const struct xfs_rtalloc_rec *rec, |
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void *priv); |
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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_rtblock_t bno, /* starting block number to allocate */ |
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xfs_extlen_t minlen, /* minimum length to allocate */ |
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xfs_extlen_t maxlen, /* maximum length to allocate */ |
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xfs_extlen_t *len, /* out: actual length allocated */ |
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int wasdel, /* was a delayed allocation extent */ |
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xfs_extlen_t prod, /* extent product factor */ |
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xfs_rtblock_t *rtblock); /* out: start block allocated */ |
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/* |
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* Free an extent in the realtime subvolume. Length is expressed in |
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* realtime extents, as is the block number. |
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*/ |
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int /* error */ |
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xfs_rtfree_extent( |
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struct xfs_trans *tp, /* transaction pointer */ |
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xfs_rtblock_t bno, /* starting block number to free */ |
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xfs_extlen_t len); /* length of extent freed */ |
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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_extlen_t len, /* allocation length (rtextents) */ |
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xfs_rtblock_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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/* |
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* From xfs_rtbitmap.c |
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*/ |
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int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t block, int issum, struct xfs_buf **bpp); |
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int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t start, xfs_extlen_t len, int val, |
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xfs_rtblock_t *new, int *stat); |
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int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t start, xfs_rtblock_t limit, |
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xfs_rtblock_t *rtblock); |
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int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t start, xfs_rtblock_t limit, |
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xfs_rtblock_t *rtblock); |
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int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t start, xfs_extlen_t len, int val); |
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int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, |
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int log, xfs_rtblock_t bbno, int delta, |
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struct xfs_buf **rbpp, xfs_fsblock_t *rsb, |
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xfs_suminfo_t *sum); |
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int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, |
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xfs_rtblock_t bbno, int delta, struct xfs_buf **rbpp, |
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xfs_fsblock_t *rsb); |
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int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t start, xfs_extlen_t len, |
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struct xfs_buf **rbpp, xfs_fsblock_t *rsb); |
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int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp, |
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const struct xfs_rtalloc_rec *low_rec, |
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const struct xfs_rtalloc_rec *high_rec, |
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xfs_rtalloc_query_range_fn fn, void *priv); |
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int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtalloc_query_range_fn fn, |
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void *priv); |
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bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno); |
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int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp, |
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xfs_rtblock_t start, xfs_extlen_t len, |
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bool *is_free); |
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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_rtfree_extent(t,b,l) (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_query_range(t,l,h,f,p) (ENOSYS) |
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# define xfs_rtalloc_query_all(m,t,f,p) (ENOSYS) |
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# define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS) |
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# define xfs_verify_rtbno(m, r) (false) |
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# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (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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