Current Path : /sys/gnu/fs/xfs/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/gnu/fs/xfs/xfs_rw.h |
/* * 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, vrwlock_t write_lock); extern void xfs_rwunlock(bhv_desc_t *bdp, vrwlock_t write_lock); extern int xfs_setattr(bhv_desc_t *bdp, xfs_vattr_t *vap, int flags, cred_t *credp); extern int xfs_change_file_space(bhv_desc_t *bdp, u_long 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__ */