81bca6ddae
1. Clustered I/O is switched by the MNT_NOCLUSTERR and MNT_NOCLUSTERW bits of the mnt_flag. The sysctl variables, vfs.foo.doclusterread and vfs.foo.doclusterwrite are deleted. Only mount option can control clustered I/O from userland. 2. When foofs_mount mounts block device, foofs_mount checks D_CLUSTERR and D_CLUSTERW bits of the d_flags member in the block device switch table. If D_NOCLUSTERR / D_NOCLUSTERW are set, MNT_NOCLUSTERR / MNT_NOCLUSTERW bits will be set. In this case, MNT_NOCLUSTERR and MNT_NOCLUSTERW cannot be cleared from userland. 3. Vnode driver disables both clustered read and write. 4. Union filesystem disables clutered write. Reviewed by: bde
116 lines
4.9 KiB
C
116 lines
4.9 KiB
C
/*
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* modified for EXT2FS support in Lites 1.1
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*
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* Aug 1995, Godmar Back (gback@cs.utah.edu)
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* University of Utah, Department of Computer Science
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*/
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/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ffs_extern.h 8.3 (Berkeley) 4/16/94
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*/
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#ifndef _SYS_GNU_EXT2FS_EXT2_EXTERN_H_
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#define _SYS_GNU_EXT2FS_EXT2_EXTERN_H_
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struct dinode;
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struct ext2_inode;
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struct inode;
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struct mount;
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struct vfsconf;
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struct vnode;
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int ext2_alloc __P((struct inode *,
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daddr_t, daddr_t, int, struct ucred *, daddr_t *));
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int ext2_balloc __P((struct inode *,
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daddr_t, int, struct ucred *, struct buf **, int));
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int ext2_blkatoff __P((struct vop_blkatoff_args *));
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void ext2_blkfree __P((struct inode *, daddr_t, long));
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daddr_t ext2_blkpref __P((struct inode *, daddr_t, int, daddr_t *, daddr_t));
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int ext2_bmap __P((struct vop_bmap_args *));
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int ext2_init __P((struct vfsconf *));
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int ext2_reallocblks __P((struct vop_reallocblks_args *));
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int ext2_reclaim __P((struct vop_reclaim_args *));
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void ext2_setblock __P((struct ext2_sb_info *, u_char *, daddr_t));
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int ext2_truncate __P((struct vop_truncate_args *));
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int ext2_update __P((struct vop_update_args *));
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int ext2_valloc __P((struct vop_valloc_args *));
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int ext2_vfree __P((struct vop_vfree_args *));
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int ext2_lookup __P((struct vop_cachedlookup_args *));
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int ext2_readdir __P((struct vop_readdir_args *));
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void ext2_print_dinode __P((struct dinode *));
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void ext2_print_inode __P((struct inode *));
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int ext2_direnter __P((struct inode *,
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struct vnode *, struct componentname *));
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int ext2_dirremove __P((struct vnode *, struct componentname *));
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int ext2_dirrewrite __P((struct inode *,
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struct inode *, struct componentname *));
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int ext2_dirempty __P((struct inode *, ino_t, struct ucred *));
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int ext2_checkpath __P((struct inode *, struct inode *, struct ucred *));
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struct ext2_group_desc * get_group_desc __P((struct mount * ,
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unsigned int , struct buf ** ));
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void ext2_discard_prealloc __P((struct inode *));
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int ext2_inactive __P((struct vop_inactive_args *));
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int ll_w_block __P((struct buf *, int ));
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int ext2_new_block __P ((struct mount * mp, unsigned long goal,
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int * prealloc_count,
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int * prealloc_block));
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ino_t ext2_new_inode __P ((const struct inode * dir, int mode));
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unsigned long ext2_count_free __P((struct buf *map, unsigned int numchars));
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void ext2_free_blocks __P((struct mount * mp, unsigned long block,
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unsigned long count));
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void ext2_free_inode __P((struct inode * inode));
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void ext2_ei2di __P((struct ext2_inode *ei, struct dinode *di));
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void ext2_di2ei __P((struct dinode *di, struct ext2_inode *ei));
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void mark_buffer_dirty __P((struct buf *bh));
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#if !defined(__FreeBSD__)
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int bwrite(); /* FFS needs a bwrite routine. XXX */
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#define gettime get_time
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#endif
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/*
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* This macro allows the ufs code to distinguish between an EXT2 and a
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* non-ext2(FFS/LFS) vnode.
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*/
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#define IS_EXT2_VNODE(vp) (vp->v_mount->mnt_stat.f_type == MOUNT_EXT2FS)
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#ifdef DIAGNOSTIC
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void ext2_checkoverlap __P((struct buf *, struct inode *));
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#endif
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extern vop_t **ext2_vnodeop_p;
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extern vop_t **ext2_specop_p;
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extern vop_t **ext2_fifoop_p;
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#endif /* !_SYS_GNU_EXT2FS_EXT2_EXTERN_H_ */
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