| /* |
| * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms 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. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #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. |
| */ |
| #define XFS_FSB_TO_DB(ip,fsb) xfs_fsb_to_db(ip,fsb) |
| static inline xfs_daddr_t |
| xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb) |
| { |
| return (((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))); |
| } |
| #define XFS_FSB_TO_DB_IO(io,fsb) xfs_fsb_to_db_io(io,fsb) |
| static inline xfs_daddr_t |
| xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb) |
| { |
| return (((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. |
| */ |
| extern int xfs_write_clear_setuid(struct xfs_inode *ip); |
| extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp); |
| extern int xfs_bioerror(struct xfs_buf *bp); |
| extern int xfs_bioerror_relse(struct xfs_buf *bp); |
| extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp, |
| xfs_daddr_t blkno, int len, uint flags, |
| struct xfs_buf **bpp); |
| extern 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. |
| */ |
| extern int xfs_rwlock(bhv_desc_t *bdp, bhv_vrwlock_t write_lock); |
| extern void xfs_rwunlock(bhv_desc_t *bdp, bhv_vrwlock_t write_lock); |
| extern int xfs_setattr(bhv_desc_t *, bhv_vattr_t *vap, int flags, |
| cred_t *credp); |
| extern int xfs_change_file_space(bhv_desc_t *bdp, int cmd, xfs_flock64_t *bf, |
| xfs_off_t offset, cred_t *credp, int flags); |
| extern int xfs_set_dmattrs(bhv_desc_t *bdp, u_int evmask, u_int16_t state, |
| cred_t *credp); |
| |
| #endif /* __XFS_RW_H__ */ |