03a2057a5b
which small and/or nearly full filesystems would fail with `file system full' messages when trying to replace a number of existing files (for example during a system installation). When the allocation routines are about to fail with a file system full condition, they make a call to softdep_request_cleanup() which attempts to accelerate the flushing of pending deletion requests in an effort to free up space. In the face of filesystem I/O requests that exceed the available disk transfer capacity, the cleanup request could take an unbounded amount of time. Thus, the softdep_request_cleanup() routine will only try for tickdelay seconds (default 2 seconds) before giving up and returning a filesystem full error. Under typical conditions, the softdep_request_cleanup() routine is able to free up space in under fifty milliseconds.
130 lines
5.8 KiB
C
130 lines
5.8 KiB
C
/*-
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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 8.6 (Berkeley) 3/30/95
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* $FreeBSD$
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*/
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#ifndef _UFS_FFS_EXTERN_H
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#define _UFS_FFS_EXTERN_H
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struct buf;
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struct cg;
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struct fid;
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struct fs;
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struct inode;
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struct malloc_type;
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struct mount;
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struct thread;
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struct sockaddr;
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struct statfs;
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struct ucred;
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struct vnode;
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struct vop_balloc_args;
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struct vop_fsync_args;
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struct vop_reallocblks_args;
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struct vop_copyonwrite_args;
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int ffs_alloc __P((struct inode *,
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ufs_daddr_t, ufs_daddr_t, int, struct ucred *, ufs_daddr_t *));
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int ffs_balloc __P((struct vnode *a_vp, off_t a_startoffset, int a_size,
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struct ucred *a_cred, int a_flags, struct buf **a_bpp));
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int ffs_blkatoff __P((struct vnode *, off_t, char **, struct buf **));
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void ffs_blkfree __P((struct inode *, ufs_daddr_t, long));
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ufs_daddr_t ffs_blkpref __P((struct inode *, ufs_daddr_t, int, ufs_daddr_t *));
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void ffs_clrblock __P((struct fs *, u_char *, ufs_daddr_t));
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void ffs_clusteracct __P((struct fs *, struct cg *, ufs_daddr_t, int));
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int ffs_fhtovp __P((struct mount *, struct fid *, struct vnode **));
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int ffs_flushfiles __P((struct mount *, int, struct thread *));
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void ffs_fragacct __P((struct fs *, int, int32_t [], int));
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int ffs_freefile __P((struct inode *, ino_t, int ));
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int ffs_isblock __P((struct fs *, u_char *, ufs_daddr_t));
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int ffs_isfreeblock __P((struct fs *, unsigned char *, ufs_daddr_t));
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int ffs_mountfs __P((struct vnode *, struct mount *, struct thread *,
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struct malloc_type *));
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int ffs_mountroot __P((void));
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int ffs_mount __P((struct mount *, char *, caddr_t, struct nameidata *,
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struct thread *));
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int ffs_reallocblks __P((struct vop_reallocblks_args *));
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int ffs_realloccg __P((struct inode *,
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ufs_daddr_t, ufs_daddr_t, int, int, struct ucred *, struct buf **));
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void ffs_setblock __P((struct fs *, u_char *, ufs_daddr_t));
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int ffs_snapblkfree __P((struct inode *freeip, ufs_daddr_t bno, long size));
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void ffs_snapremove __P((struct vnode *vp));
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int ffs_snapshot __P((struct mount *mp, char *snapfile));
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void ffs_snapshot_mount __P((struct mount *mp));
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void ffs_snapshot_unmount __P((struct mount *mp));
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int ffs_statfs __P((struct mount *, struct statfs *, struct thread *));
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int ffs_sync __P((struct mount *, int, struct ucred *, struct thread *));
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int ffs_truncate __P((struct vnode *, off_t, int, struct ucred *, struct thread *));
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int ffs_unmount __P((struct mount *, int, struct thread *));
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int ffs_update __P((struct vnode *, int));
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int ffs_valloc __P((struct vnode *, int, struct ucred *, struct vnode **));
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int ffs_vfree __P((struct vnode *, ino_t, int));
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int ffs_vget __P((struct mount *, ino_t, struct vnode **));
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int ffs_vptofh __P((struct vnode *, struct fid *));
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extern vop_t **ffs_vnodeop_p;
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extern vop_t **ffs_specop_p;
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extern vop_t **ffs_fifoop_p;
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/*
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* Soft update function prototypes.
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*/
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void softdep_initialize __P((void));
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int softdep_mount __P((struct vnode *, struct mount *, struct fs *,
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struct ucred *));
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int softdep_flushworklist __P((struct mount *, int *, struct thread *));
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int softdep_flushfiles __P((struct mount *, int, struct thread *));
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void softdep_update_inodeblock __P((struct inode *, struct buf *, int));
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void softdep_load_inodeblock __P((struct inode *));
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void softdep_freefile __P((struct vnode *, ino_t, int));
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int softdep_request_cleanup __P((struct fs *, struct vnode *));
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void softdep_setup_freeblocks __P((struct inode *, off_t));
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void softdep_setup_inomapdep __P((struct buf *, struct inode *, ino_t));
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void softdep_setup_blkmapdep __P((struct buf *, struct fs *, ufs_daddr_t));
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void softdep_setup_allocdirect __P((struct inode *, ufs_lbn_t, ufs_daddr_t,
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ufs_daddr_t, long, long, struct buf *));
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void softdep_setup_allocindir_meta __P((struct buf *, struct inode *,
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struct buf *, int, ufs_daddr_t));
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void softdep_setup_allocindir_page __P((struct inode *, ufs_lbn_t,
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struct buf *, int, ufs_daddr_t, ufs_daddr_t, struct buf *));
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void softdep_fsync_mountdev __P((struct vnode *));
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int softdep_sync_metadata __P((struct vop_fsync_args *));
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/* XXX incorrectly moved to mount.h - should be indirect function */
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#if 0
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int softdep_fsync __P((struct vnode *vp));
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#endif
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#endif /* !_UFS_FFS_EXTERN_H */
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