3a326a2ce8
separate out the 'internal pipe object' abstraction, and make it usable to splice. This cleans up and fixes several aspects of the internal splice APIs and the pipe code: - pipes: the allocation and freeing of pipe_inode_info is now more symmetric and more streamlined with existing kernel practices. - splice: small micro-optimization: less pointer dereferencing in splice methods Signed-off-by: Ingo Molnar <mingo@elte.hu> Update XFS for the ->splice_read/->splice_write changes. Signed-off-by: Jens Axboe <axboe@suse.de>
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
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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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* 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_LRW_H__
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#define __XFS_LRW_H__
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struct vnode;
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struct bhv_desc;
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struct xfs_mount;
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struct xfs_iocore;
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struct xfs_inode;
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struct xfs_bmbt_irec;
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struct xfs_buf;
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struct xfs_iomap;
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#if defined(XFS_RW_TRACE)
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/*
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* Defines for the trace mechanisms in xfs_lrw.c.
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*/
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#define XFS_RW_KTRACE_SIZE 128
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#define XFS_READ_ENTER 1
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#define XFS_WRITE_ENTER 2
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#define XFS_IOMAP_READ_ENTER 3
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#define XFS_IOMAP_WRITE_ENTER 4
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#define XFS_IOMAP_READ_MAP 5
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#define XFS_IOMAP_WRITE_MAP 6
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#define XFS_IOMAP_WRITE_NOSPACE 7
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#define XFS_ITRUNC_START 8
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#define XFS_ITRUNC_FINISH1 9
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#define XFS_ITRUNC_FINISH2 10
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#define XFS_CTRUNC1 11
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#define XFS_CTRUNC2 12
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#define XFS_CTRUNC3 13
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#define XFS_CTRUNC4 14
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#define XFS_CTRUNC5 15
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#define XFS_CTRUNC6 16
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#define XFS_BUNMAPI 17
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#define XFS_INVAL_CACHED 18
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#define XFS_DIORD_ENTER 19
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#define XFS_DIOWR_ENTER 20
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#define XFS_SENDFILE_ENTER 21
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#define XFS_WRITEPAGE_ENTER 22
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#define XFS_RELEASEPAGE_ENTER 23
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#define XFS_INVALIDPAGE_ENTER 24
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#define XFS_IOMAP_ALLOC_ENTER 25
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#define XFS_IOMAP_ALLOC_MAP 26
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#define XFS_IOMAP_UNWRITTEN 27
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#define XFS_SPLICE_READ_ENTER 28
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#define XFS_SPLICE_WRITE_ENTER 29
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extern void xfs_rw_enter_trace(int, struct xfs_iocore *,
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void *, size_t, loff_t, int);
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extern void xfs_inval_cached_trace(struct xfs_iocore *,
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xfs_off_t, xfs_off_t, xfs_off_t, xfs_off_t);
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#else
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#define xfs_rw_enter_trace(tag, io, data, size, offset, ioflags)
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#define xfs_inval_cached_trace(io, offset, len, first, last)
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#endif
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/*
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* Maximum count of bmaps used by read and write paths.
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*/
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#define XFS_MAX_RW_NBMAPS 4
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extern int xfs_bmap(struct bhv_desc *, xfs_off_t, ssize_t, int,
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struct xfs_iomap *, int *);
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extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
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extern int xfs_bdstrat_cb(struct xfs_buf *);
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extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
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extern int xfs_zero_eof(struct vnode *, struct xfs_iocore *, xfs_off_t,
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xfs_fsize_t, xfs_fsize_t);
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extern ssize_t xfs_read(struct bhv_desc *, struct kiocb *,
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const struct iovec *, unsigned int,
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loff_t *, int, struct cred *);
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extern ssize_t xfs_write(struct bhv_desc *, struct kiocb *,
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const struct iovec *, unsigned int,
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loff_t *, int, struct cred *);
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extern ssize_t xfs_sendfile(struct bhv_desc *, struct file *,
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loff_t *, int, size_t, read_actor_t,
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void *, struct cred *);
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extern ssize_t xfs_splice_read(struct bhv_desc *, struct file *,
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struct pipe_inode_info *, size_t, int, int,
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struct cred *);
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extern ssize_t xfs_splice_write(struct bhv_desc *, struct pipe_inode_info *,
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struct file *, size_t, int, int,
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struct cred *);
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#endif /* __XFS_LRW_H__ */
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