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Diffstat (limited to 'fs/xfs/xfs_rw.h')
| -rw-r--r-- | fs/xfs/xfs_rw.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h new file mode 100644 index 00000000000..c8b10bf8f53 --- /dev/null +++ b/fs/xfs/xfs_rw.h @@ -0,0 +1,154 @@ +/* + * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ +#ifndef __XFS_RW_H__ +#define __XFS_RW_H__ + +struct xfs_buf; +struct xfs_inode; +struct xfs_mount; + +/* + * Maximum count of bmaps used by read and write paths. + */ +#define XFS_MAX_RW_NBMAPS 4 + +/* + * Counts of readahead buffers to use based on physical memory size. + * None of these should be more than XFS_MAX_RW_NBMAPS. + */ +#define XFS_RW_NREADAHEAD_16MB 2 +#define XFS_RW_NREADAHEAD_32MB 3 +#define XFS_RW_NREADAHEAD_K32 4 +#define XFS_RW_NREADAHEAD_K64 4 + +/* + * Maximum size of a buffer that we\'ll map. Making this + * too big will degrade performance due to the number of + * pages which need to be gathered. Making it too small + * will prevent us from doing large I/O\'s to hardware that + * needs it. + * + * This is currently set to 512 KB. + */ +#define XFS_MAX_BMAP_LEN_BB 1024 +#define XFS_MAX_BMAP_LEN_BYTES 524288 + +/* + * Convert the given file system block to a disk block. + * We have to treat it differently based on whether the + * file is a real time file or not, because the bmap code + * does. + */ +#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FSB_TO_DB) +xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb); +#define XFS_FSB_TO_DB(ip,fsb) xfs_fsb_to_db(ip,fsb) +#else +#define XFS_FSB_TO_DB(ip,fsb) \ + (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \ + (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \ + XFS_FSB_TO_DADDR((ip)->i_mount, (fsb))) +#endif + +#define XFS_FSB_TO_DB_IO(io,fsb) \ + (((io)->io_flags & XFS_IOCORE_RT) ? \ + XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \ + XFS_FSB_TO_DADDR((io)->io_mount, (fsb))) + +/* + * Prototypes for functions in xfs_rw.c. + */ + +int +xfs_write_clear_setuid( + struct xfs_inode *ip); + +int +xfs_bwrite( + struct xfs_mount *mp, + struct xfs_buf *bp); + +int +xfs_bioerror( + struct xfs_buf *b); + +int +xfs_bioerror_relse( + struct xfs_buf *b); + +int +xfs_read_buf( + struct xfs_mount *mp, + xfs_buftarg_t *target, + xfs_daddr_t blkno, + int len, + uint flags, + struct xfs_buf **bpp); + +void +xfs_ioerror_alert( + char *func, + struct xfs_mount *mp, + xfs_buf_t *bp, + xfs_daddr_t blkno); + + +/* + * Prototypes for functions in xfs_vnodeops.c. + */ + +int +xfs_rwlock( + bhv_desc_t *bdp, + vrwlock_t write_lock); + +void +xfs_rwunlock( + bhv_desc_t *bdp, + vrwlock_t write_lock); + +int +xfs_change_file_space( + bhv_desc_t *bdp, + int cmd, + xfs_flock64_t *bf, + xfs_off_t offset, + cred_t *credp, + int flags); + +int +xfs_set_dmattrs( + bhv_desc_t *bdp, + u_int evmask, + u_int16_t state, + cred_t *credp); + +#endif /* __XFS_RW_H__ */ |