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6898811459
There is a bunch of code in xfs_bmap.c that is kernel specific and not shared with userspace. To minimise the difference between the kernel and userspace code, shift this unshared code to xfs_bmap_util.c, and the declarations to xfs_bmap_util.h. The biggest issue here is xfs_bmap_finish() - userspace has it's own definition of this function, and so we need to move it out of xfs_bmap.[ch]. This means several other files need to include xfs_bmap_util.h as well. It also introduces and interesting dance for the stack switching code in xfs_bmapi_allocate(). The stack switching/workqueue code is actually moved to xfs_bmap_util.c, so that userspace can simply use a #define in a header file to connect the dots without needing to know about the stack switch code at all. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_BMAP_UTIL_H__
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#define __XFS_BMAP_UTIL_H__
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/* Kernel only BMAP related definitions and functions */
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struct xfs_bmbt_irec;
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struct xfs_ifork;
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struct xfs_inode;
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struct xfs_mount;
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struct xfs_trans;
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/*
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* Argument structure for xfs_bmap_alloc.
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*/
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struct xfs_bmalloca {
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xfs_fsblock_t *firstblock; /* i/o first block allocated */
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struct xfs_bmap_free *flist; /* bmap freelist */
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struct xfs_trans *tp; /* transaction pointer */
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struct xfs_inode *ip; /* incore inode pointer */
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struct xfs_bmbt_irec prev; /* extent before the new one */
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struct xfs_bmbt_irec got; /* extent after, or delayed */
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xfs_fileoff_t offset; /* offset in file filling in */
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xfs_extlen_t length; /* i/o length asked/allocated */
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xfs_fsblock_t blkno; /* starting block of new extent */
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struct xfs_btree_cur *cur; /* btree cursor */
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xfs_extnum_t idx; /* current extent index */
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int nallocs;/* number of extents alloc'd */
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int logflags;/* flags for transaction logging */
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xfs_extlen_t total; /* total blocks needed for xaction */
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xfs_extlen_t minlen; /* minimum allocation size (blocks) */
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xfs_extlen_t minleft; /* amount must be left after alloc */
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char eof; /* set if allocating past last extent */
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char wasdel; /* replacing a delayed allocation */
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char userdata;/* set if is user data */
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char aeof; /* allocated space at eof */
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char conv; /* overwriting unwritten extents */
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char stack_switch;
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int flags;
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struct completion *done;
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struct work_struct work;
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int result;
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};
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int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,
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int *committed);
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int xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
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int xfs_bmapi_allocate(struct xfs_bmalloca *args);
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int __xfs_bmapi_allocate(struct xfs_bmalloca *args);
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int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
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int whichfork, int *eof);
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int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
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int whichfork, int *count);
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int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
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xfs_fileoff_t start_fsb, xfs_fileoff_t length);
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/* bmap to userspace formatter - copy to user & advance pointer */
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typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);
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int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
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xfs_bmap_format_t formatter, void *arg);
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/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
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void xfs_bmap_del_free(struct xfs_bmap_free *flist,
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struct xfs_bmap_free_item *prev,
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struct xfs_bmap_free_item *free);
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int xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
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struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
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int rt, int eof, int delay, int convert,
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xfs_fileoff_t *offp, xfs_extlen_t *lenp);
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void xfs_bmap_adjacent(struct xfs_bmalloca *ap);
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int xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
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int whichfork, struct xfs_bmbt_irec *rec,
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int *is_empty);
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xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
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#endif /* __XFS_BMAP_UTIL_H__ */
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