[apple/xnu.git] / bsd / ufs / ffs / ffs_vnops.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)ffs_vnops.c	8.15 (Berkeley) 5/14/95
 */

#include <rev_endian_fs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <sys/ubc.h>

#include <sys/vm.h>
#include <vfs/vfs_support.h>

#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>

#include <ufs/ufs/lockf.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>

#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#if REV_ENDIAN_FS
#include <ufs/ufs/ufs_byte_order.h>
#include <architecture/byte_order.h>
#endif /* REV_ENDIAN_FS */

#define VOPFUNC int (*)(void *)

/* Global vfs data structures for ufs. */
int (**ffs_vnodeop_p)(void *);
struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
	{ &vop_default_desc, (VOPFUNC)vn_default_error },
	{ &vop_lookup_desc, (VOPFUNC)ufs_lookup },		/* lookup */
	{ &vop_create_desc, (VOPFUNC)ufs_create },		/* create */
	{ &vop_whiteout_desc, (VOPFUNC)ufs_whiteout },		/* whiteout */
	{ &vop_mknod_desc, (VOPFUNC)ufs_mknod },		/* mknod */
	{ &vop_open_desc, (VOPFUNC)ufs_open },			/* open */
	{ &vop_close_desc, (VOPFUNC)ufs_close },		/* close */
	{ &vop_access_desc, (VOPFUNC)ufs_access },		/* access */
	{ &vop_getattr_desc, (VOPFUNC)ufs_getattr },		/* getattr */
	{ &vop_setattr_desc, (VOPFUNC)ufs_setattr },		/* setattr */
	{ &vop_read_desc, (VOPFUNC)ffs_read },			/* read */
	{ &vop_write_desc, (VOPFUNC)ffs_write },		/* write */
	{ &vop_lease_desc, (VOPFUNC)ufs_lease_check },		/* lease */
	{ &vop_ioctl_desc, (VOPFUNC)ufs_ioctl },		/* ioctl */
	{ &vop_select_desc, (VOPFUNC)ufs_select },		/* select */
	{ &vop_revoke_desc, (VOPFUNC)ufs_revoke },		/* revoke */
	{ &vop_mmap_desc, (VOPFUNC)ufs_mmap },			/* mmap */
	{ &vop_fsync_desc, (VOPFUNC)ffs_fsync },		/* fsync */
	{ &vop_seek_desc, (VOPFUNC)ufs_seek },			/* seek */
	{ &vop_remove_desc, (VOPFUNC)ufs_remove },		/* remove */
	{ &vop_link_desc, (VOPFUNC)ufs_link },			/* link */
	{ &vop_rename_desc, (VOPFUNC)ufs_rename },		/* rename */
	{ &vop_mkdir_desc, (VOPFUNC)ufs_mkdir },		/* mkdir */
	{ &vop_rmdir_desc, (VOPFUNC)ufs_rmdir },		/* rmdir */
	{ &vop_symlink_desc, (VOPFUNC)ufs_symlink },		/* symlink */
	{ &vop_readdir_desc, (VOPFUNC)ufs_readdir },		/* readdir */
	{ &vop_readlink_desc, (VOPFUNC)ufs_readlink },		/* readlink */
	{ &vop_abortop_desc, (VOPFUNC)ufs_abortop },		/* abortop */
	{ &vop_inactive_desc, (VOPFUNC)ufs_inactive },		/* inactive */
	{ &vop_reclaim_desc, (VOPFUNC)ffs_reclaim },		/* reclaim */
	{ &vop_lock_desc, (VOPFUNC)ufs_lock },			/* lock */
	{ &vop_unlock_desc, (VOPFUNC)ufs_unlock },		/* unlock */
	{ &vop_bmap_desc, (VOPFUNC)ufs_bmap },			/* bmap */
	{ &vop_strategy_desc, (VOPFUNC)ufs_strategy },		/* strategy */
	{ &vop_print_desc, (VOPFUNC)ufs_print },		/* print */
	{ &vop_islocked_desc, (VOPFUNC)ufs_islocked },		/* islocked */
	{ &vop_pathconf_desc, (VOPFUNC)ufs_pathconf },		/* pathconf */
	{ &vop_advlock_desc, (VOPFUNC)ufs_advlock },		/* advlock */
	{ &vop_blkatoff_desc, (VOPFUNC)ffs_blkatoff },		/* blkatoff */
	{ &vop_valloc_desc, (VOPFUNC)ffs_valloc },		/* valloc */
	{ &vop_reallocblks_desc, (VOPFUNC)ffs_reallocblks },	/* reallocblks */
	{ &vop_vfree_desc, (VOPFUNC)ffs_vfree },		/* vfree */
	{ &vop_truncate_desc, (VOPFUNC)ffs_truncate },		/* truncate */
	{ &vop_update_desc, (VOPFUNC)ffs_update },		/* update */
	{ &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
	{ &vop_pagein_desc, (VOPFUNC)ffs_pagein },		/* Pagein */
	{ &vop_pageout_desc, (VOPFUNC)ffs_pageout },		/* Pageout */
	{ &vop_copyfile_desc, (VOPFUNC)err_copyfile },		/* Copy File */
	{ &vop_blktooff_desc, (VOPFUNC)ffs_blktooff },		/* blktooff */
	{ &vop_offtoblk_desc, (VOPFUNC)ffs_offtoblk },		/* offtoblk */
	{ &vop_cmap_desc, (VOPFUNC)ufs_cmap },			/* cmap */
	{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc ffs_vnodeop_opv_desc =
	{ &ffs_vnodeop_p, ffs_vnodeop_entries };

int (**ffs_specop_p)(void *);
struct vnodeopv_entry_desc ffs_specop_entries[] = {
	{ &vop_default_desc, (VOPFUNC)vn_default_error },
	{ &vop_lookup_desc, (VOPFUNC)spec_lookup },		/* lookup */
	{ &vop_create_desc, (VOPFUNC)spec_create },		/* create */
	{ &vop_mknod_desc, (VOPFUNC)spec_mknod },		/* mknod */
	{ &vop_open_desc, (VOPFUNC)spec_open },			/* open */
	{ &vop_close_desc, (VOPFUNC)ufsspec_close },		/* close */
	{ &vop_access_desc, (VOPFUNC)ufs_access },		/* access */
	{ &vop_getattr_desc, (VOPFUNC)ufs_getattr },		/* getattr */
	{ &vop_setattr_desc, (VOPFUNC)ufs_setattr },		/* setattr */
	{ &vop_read_desc, (VOPFUNC)ufsspec_read },		/* read */
	{ &vop_write_desc, (VOPFUNC)ufsspec_write },		/* write */
	{ &vop_lease_desc, (VOPFUNC)spec_lease_check },		/* lease */
	{ &vop_ioctl_desc, (VOPFUNC)spec_ioctl },		/* ioctl */
	{ &vop_select_desc, (VOPFUNC)spec_select },		/* select */
	{ &vop_revoke_desc, (VOPFUNC)spec_revoke },		/* revoke */
	{ &vop_mmap_desc, (VOPFUNC)spec_mmap },			/* mmap */
	{ &vop_fsync_desc, (VOPFUNC)ffs_fsync },		/* fsync */
	{ &vop_seek_desc, (VOPFUNC)spec_seek },			/* seek */
	{ &vop_remove_desc, (VOPFUNC)spec_remove },		/* remove */
	{ &vop_link_desc, (VOPFUNC)spec_link },			/* link */
	{ &vop_rename_desc, (VOPFUNC)spec_rename },		/* rename */
	{ &vop_mkdir_desc, (VOPFUNC)spec_mkdir },		/* mkdir */
	{ &vop_rmdir_desc, (VOPFUNC)spec_rmdir },		/* rmdir */
	{ &vop_symlink_desc, (VOPFUNC)spec_symlink },		/* symlink */
	{ &vop_readdir_desc, (VOPFUNC)spec_readdir },		/* readdir */
	{ &vop_readlink_desc, (VOPFUNC)spec_readlink },		/* readlink */
	{ &vop_abortop_desc, (VOPFUNC)spec_abortop },		/* abortop */
	{ &vop_inactive_desc, (VOPFUNC)ufs_inactive },		/* inactive */
	{ &vop_reclaim_desc, (VOPFUNC)ffs_reclaim },		/* reclaim */
	{ &vop_lock_desc, (VOPFUNC)ufs_lock },			/* lock */
	{ &vop_unlock_desc, (VOPFUNC)ufs_unlock },		/* unlock */
	{ &vop_bmap_desc, (VOPFUNC)spec_bmap },			/* bmap */
	{ &vop_strategy_desc, (VOPFUNC)spec_strategy },		/* strategy */
	{ &vop_print_desc, (VOPFUNC)ufs_print },		/* print */
	{ &vop_islocked_desc, (VOPFUNC)ufs_islocked },		/* islocked */
	{ &vop_pathconf_desc, (VOPFUNC)spec_pathconf },		/* pathconf */
	{ &vop_advlock_desc, (VOPFUNC)spec_advlock },		/* advlock */
	{ &vop_blkatoff_desc, (VOPFUNC)spec_blkatoff },		/* blkatoff */
	{ &vop_valloc_desc, (VOPFUNC)spec_valloc },		/* valloc */
	{ &vop_reallocblks_desc, (VOPFUNC)spec_reallocblks },	/* reallocblks */
	{ &vop_vfree_desc, (VOPFUNC)ffs_vfree },		/* vfree */
	{ &vop_truncate_desc, (VOPFUNC)spec_truncate },		/* truncate */
	{ &vop_update_desc, (VOPFUNC)ffs_update },		/* update */
	{ &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
	{ &vop_devblocksize_desc, (VOPFUNC)spec_devblocksize },	/* devblocksize */
	{ &vop_pagein_desc, (VOPFUNC)ffs_pagein },		/* Pagein */
	{ &vop_pageout_desc, (VOPFUNC)ffs_pageout },		/* Pageout */
	{ &vop_copyfile_desc, (VOPFUNC)err_copyfile },		/* Copy File */
	{ &vop_blktooff_desc, (VOPFUNC)ffs_blktooff },		/* blktooff */
	{ &vop_offtoblk_desc, (VOPFUNC)ffs_offtoblk },		/* offtoblk */
	{ &vop_cmap_desc, (VOPFUNC)spec_cmap },			/* cmap */
	{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc ffs_specop_opv_desc =
	{ &ffs_specop_p, ffs_specop_entries };

#if FIFO
int (**ffs_fifoop_p)(void *);
struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
	{ &vop_default_desc, (VOPFUNC)vn_default_error },
	{ &vop_lookup_desc, (VOPFUNC)fifo_lookup },		/* lookup */
	{ &vop_create_desc, (VOPFUNC)fifo_create },		/* create */
	{ &vop_mknod_desc, (VOPFUNC)fifo_mknod },		/* mknod */
	{ &vop_open_desc, (VOPFUNC)fifo_open },			/* open */
	{ &vop_close_desc, (VOPFUNC)ufsfifo_close },		/* close */
	{ &vop_access_desc, (VOPFUNC)ufs_access },		/* access */
	{ &vop_getattr_desc, (VOPFUNC)ufs_getattr },		/* getattr */
	{ &vop_setattr_desc, (VOPFUNC)ufs_setattr },		/* setattr */
	{ &vop_read_desc, (VOPFUNC)ufsfifo_read },		/* read */
	{ &vop_write_desc, (VOPFUNC)ufsfifo_write },		/* write */
	{ &vop_lease_desc, (VOPFUNC)fifo_lease_check },		/* lease */
	{ &vop_ioctl_desc, (VOPFUNC)fifo_ioctl },		/* ioctl */
	{ &vop_select_desc, (VOPFUNC)fifo_select },		/* select */
	{ &vop_revoke_desc, (VOPFUNC)fifo_revoke },		/* revoke */
	{ &vop_mmap_desc, (VOPFUNC)fifo_mmap },			/* mmap */
	{ &vop_fsync_desc, (VOPFUNC)ffs_fsync },		/* fsync */
	{ &vop_seek_desc, (VOPFUNC)fifo_seek },			/* seek */
	{ &vop_remove_desc, (VOPFUNC)fifo_remove },		/* remove */
	{ &vop_link_desc, (VOPFUNC)fifo_link },			/* link */
	{ &vop_rename_desc, (VOPFUNC)fifo_rename },		/* rename */
	{ &vop_mkdir_desc, (VOPFUNC)fifo_mkdir },		/* mkdir */
	{ &vop_rmdir_desc, (VOPFUNC)fifo_rmdir },		/* rmdir */
	{ &vop_symlink_desc, (VOPFUNC)fifo_symlink },		/* symlink */
	{ &vop_readdir_desc, (VOPFUNC)fifo_readdir },		/* readdir */
	{ &vop_readlink_desc, (VOPFUNC)fifo_readlink },		/* readlink */
	{ &vop_abortop_desc, (VOPFUNC)fifo_abortop },		/* abortop */
	{ &vop_inactive_desc, (VOPFUNC)ufs_inactive },		/* inactive */
	{ &vop_reclaim_desc, (VOPFUNC)ffs_reclaim },		/* reclaim */
	{ &vop_lock_desc, (VOPFUNC)ufs_lock },			/* lock */
	{ &vop_unlock_desc, (VOPFUNC)ufs_unlock },		/* unlock */
	{ &vop_bmap_desc, (VOPFUNC)fifo_bmap },			/* bmap */
	{ &vop_strategy_desc, (VOPFUNC)fifo_strategy },		/* strategy */
	{ &vop_print_desc, (VOPFUNC)ufs_print },		/* print */
	{ &vop_islocked_desc, (VOPFUNC)ufs_islocked },		/* islocked */
	{ &vop_pathconf_desc, (VOPFUNC)fifo_pathconf },		/* pathconf */
	{ &vop_advlock_desc, (VOPFUNC)fifo_advlock },		/* advlock */
	{ &vop_blkatoff_desc, (VOPFUNC)fifo_blkatoff },		/* blkatoff */
	{ &vop_valloc_desc, (VOPFUNC)fifo_valloc },		/* valloc */
	{ &vop_reallocblks_desc, (VOPFUNC)fifo_reallocblks },	/* reallocblks */
	{ &vop_vfree_desc, (VOPFUNC)ffs_vfree },		/* vfree */
	{ &vop_truncate_desc, (VOPFUNC)fifo_truncate },		/* truncate */
	{ &vop_update_desc, (VOPFUNC)ffs_update },		/* update */
	{ &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
	{ &vop_pagein_desc, (VOPFUNC)ffs_pagein },		/* Pagein */
	{ &vop_pageout_desc, (VOPFUNC)ffs_pageout },		/* Pageout */
	{ &vop_copyfile_desc, (VOPFUNC)err_copyfile },		/*  Copy File */
	{ &vop_blktooff_desc, (VOPFUNC)ffs_blktooff },		/* blktooff */
	{ &vop_offtoblk_desc, (VOPFUNC)ffs_offtoblk },		/* offtoblk */
	{ &vop_cmap_desc, (VOPFUNC)ufs_cmap },			/* cmap */
	{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc ffs_fifoop_opv_desc =
	{ &ffs_fifoop_p, ffs_fifoop_entries };
#endif /* FIFO */

/*
 * Enabling cluster read/write operations.
 */
int doclusterread = 0;
int doclusterwrite = 0;

#include <ufs/ufs/ufs_readwrite.c>

/*
 * Synch an open file.
 */
/* ARGSUSED */
int
ffs_fsync(ap)
	struct vop_fsync_args /* {
		struct vnode *a_vp;
		struct ucred *a_cred;
		int a_waitfor;
		struct proc *a_p;
	} */ *ap;
{
	register struct vnode *vp = ap->a_vp;
	register struct buf *bp;
	struct timeval tv;
	struct buf *nbp;
	int s;
	struct inode *ip = VTOI(vp);

	/*
	 * Write out any clusters.
	 */
	cluster_push(vp);

	/*
	 * Flush all dirty buffers associated with a vnode.
	 */
loop:
	s = splbio();
	for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
		nbp = bp->b_vnbufs.le_next;
		if ((bp->b_flags & B_BUSY))
			continue;
		if ((bp->b_flags & B_DELWRI) == 0)
			panic("ffs_fsync: not dirty");
		bremfree(bp);
		bp->b_flags |= B_BUSY;
		splx(s);
		/*
		 * Wait for I/O associated with indirect blocks to complete,
		 * since there is no way to quickly wait for them below.
		 */
		if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT)
			(void) bawrite(bp);
		else
			(void) bwrite(bp);
		goto loop;
	}
	if (vp->v_flag & VHASDIRTY)
		ubc_pushdirty(vp);

	if (ap->a_waitfor == MNT_WAIT) {
		while (vp->v_numoutput) {
			vp->v_flag |= VBWAIT;
			tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "ffs_fsync", 0);
		}

		/* I have seen this happen for swapfile. So it is safer to
		 * check for dirty buffers again.  --Umesh
		 */
		if (vp->v_dirtyblkhd.lh_first || (vp->v_flag & VHASDIRTY)) {
			vprint("ffs_fsync: dirty", vp);
			splx(s);
			goto loop;
		}
	}
	splx(s);
	tv = time;
	return (VOP_UPDATE(ap->a_vp, &tv, &tv, ap->a_waitfor == MNT_WAIT));
}

/*
 * Reclaim an inode so that it can be used for other purposes.
 */
int
ffs_reclaim(ap)
	struct vop_reclaim_args /* {
		struct vnode *a_vp;
		struct proc *a_p;
	} */ *ap;
{
	register struct vnode *vp = ap->a_vp;
	int error;

	if (error = ufs_reclaim(vp, ap->a_p))
		return (error);
	FREE_ZONE(vp->v_data, sizeof (struct inode),
			VFSTOUFS(vp->v_mount)->um_devvp->v_tag == VT_MFS ?
					M_MFSNODE : M_FFSNODE);
	vp->v_data = NULL;
	return (0);
}

/* Blktooff converts a logical block number to a file offset */
int
ffs_blktooff(ap)
	struct vop_blktooff_args /* {
		struct vnode *a_vp;
		daddr_t a_lblkno;
		off_t *a_offset;    
	} */ *ap;
{
	register struct inode *ip;
	register FS *fs;
	ufs_daddr_t bn;


	if (ap->a_vp == NULL)
		return (EINVAL);

	ip = VTOI(ap->a_vp);
	fs = ip->I_FS;
	bn = ap->a_lblkno;

	if ((long)bn < 0) {
		panic("-ve blkno in ffs_blktooff");
		bn = -(long)bn;
	}

	*ap->a_offset = (off_t)lblktosize(fs, bn);
	return (0);
}

/* Blktooff converts a logical block number to a file offset */
int
ffs_offtoblk(ap)
	struct vop_offtoblk_args /* {
		struct vnode *a_vp;
		off_t a_offset;    
		daddr_t *a_lblkno;
	} */ *ap;
{
	register struct inode *ip;
    register FS *fs;

	if (ap->a_vp == NULL)
		return (EINVAL);

	ip = VTOI(ap->a_vp);
	fs = ip->I_FS;

	*ap->a_lblkno = (daddr_t)lblkno(fs, ap->a_offset);
	return (0);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*
	24	* Copyright (c) 1982, 1986, 1989, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* Redistribution and use in source and binary forms, with or without
	28	* modification, are permitted provided that the following conditions
	29	* are met:
	30	* 1. Redistributions of source code must retain the above copyright
	31	* notice, this list of conditions and the following disclaimer.
	32	* 2. Redistributions in binary form must reproduce the above copyright
	33	* notice, this list of conditions and the following disclaimer in the
	34	* documentation and/or other materials provided with the distribution.
	35	* 3. All advertising materials mentioning features or use of this software
	36	* must display the following acknowledgement:
	37	* This product includes software developed by the University of
	38	* California, Berkeley and its contributors.
	39	* 4. Neither the name of the University nor the names of its contributors
	40	* may be used to endorse or promote products derived from this software
	41	* without specific prior written permission.
	42	*
	43	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	44	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	45	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	46	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	47	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	48	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	49	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	50	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	51	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	52	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	53	* SUCH DAMAGE.
	54	*
	55	* @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
	56	*/
	57
	58	#include <rev_endian_fs.h>
	59	#include <sys/param.h>
	60	#include <sys/systm.h>
	61	#include <sys/resourcevar.h>
	62	#include <sys/kernel.h>
	63	#include <sys/file.h>
	64	#include <sys/stat.h>
65	#include <sys/buf.h>
66	#include <sys/proc.h>
67	#include <sys/conf.h>
68	#include <sys/mount.h>
69	#include <sys/vnode.h>
70	#include <sys/malloc.h>
71	#include <sys/ubc.h>
72
73	#include <sys/vm.h>
74	#include <vfs/vfs_support.h>
75
76	#include <miscfs/specfs/specdev.h>
77	#include <miscfs/fifofs/fifo.h>
78
79	#include <ufs/ufs/lockf.h>
80	#include <ufs/ufs/quota.h>
81	#include <ufs/ufs/inode.h>
82	#include <ufs/ufs/dir.h>
83	#include <ufs/ufs/ufsmount.h>
84	#include <ufs/ufs/ufs_extern.h>
85
86	#include <ufs/ffs/fs.h>
87	#include <ufs/ffs/ffs_extern.h>
88	#if REV_ENDIAN_FS
89	#include <ufs/ufs/ufs_byte_order.h>
90	#include <architecture/byte_order.h>
91	#endif /* REV_ENDIAN_FS */
92
93	#define VOPFUNC int ()(void )
94
95	/* Global vfs data structures for ufs. */
96	int (*ffs_vnodeop_p)(void );
97	struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
98	{ &vop_default_desc, (VOPFUNC)vn_default_error },
99	{ &vop_lookup_desc, (VOPFUNC)ufs_lookup }, /* lookup */
100	{ &vop_create_desc, (VOPFUNC)ufs_create }, /* create */
101	{ &vop_whiteout_desc, (VOPFUNC)ufs_whiteout }, /* whiteout */
102	{ &vop_mknod_desc, (VOPFUNC)ufs_mknod }, /* mknod */
103	{ &vop_open_desc, (VOPFUNC)ufs_open }, /* open */
104	{ &vop_close_desc, (VOPFUNC)ufs_close }, /* close */
105	{ &vop_access_desc, (VOPFUNC)ufs_access }, /* access */
106	{ &vop_getattr_desc, (VOPFUNC)ufs_getattr }, /* getattr */
107	{ &vop_setattr_desc, (VOPFUNC)ufs_setattr }, /* setattr */
108	{ &vop_read_desc, (VOPFUNC)ffs_read }, /* read */
109	{ &vop_write_desc, (VOPFUNC)ffs_write }, /* write */
110	{ &vop_lease_desc, (VOPFUNC)ufs_lease_check }, /* lease */
111	{ &vop_ioctl_desc, (VOPFUNC)ufs_ioctl }, /* ioctl */
112	{ &vop_select_desc, (VOPFUNC)ufs_select }, /* select */
113	{ &vop_revoke_desc, (VOPFUNC)ufs_revoke }, /* revoke */
114	{ &vop_mmap_desc, (VOPFUNC)ufs_mmap }, /* mmap */
115	{ &vop_fsync_desc, (VOPFUNC)ffs_fsync }, /* fsync */
116	{ &vop_seek_desc, (VOPFUNC)ufs_seek }, /* seek */
117	{ &vop_remove_desc, (VOPFUNC)ufs_remove }, /* remove */
118	{ &vop_link_desc, (VOPFUNC)ufs_link }, /* link */
119	{ &vop_rename_desc, (VOPFUNC)ufs_rename }, /* rename */
120	{ &vop_mkdir_desc, (VOPFUNC)ufs_mkdir }, /* mkdir */
121	{ &vop_rmdir_desc, (VOPFUNC)ufs_rmdir }, /* rmdir */
122	{ &vop_symlink_desc, (VOPFUNC)ufs_symlink }, /* symlink */
123	{ &vop_readdir_desc, (VOPFUNC)ufs_readdir }, /* readdir */
124	{ &vop_readlink_desc, (VOPFUNC)ufs_readlink }, /* readlink */
125	{ &vop_abortop_desc, (VOPFUNC)ufs_abortop }, /* abortop */
126	{ &vop_inactive_desc, (VOPFUNC)ufs_inactive }, /* inactive */
127	{ &vop_reclaim_desc, (VOPFUNC)ffs_reclaim }, /* reclaim */
128	{ &vop_lock_desc, (VOPFUNC)ufs_lock }, /* lock */
129	{ &vop_unlock_desc, (VOPFUNC)ufs_unlock }, /* unlock */
130	{ &vop_bmap_desc, (VOPFUNC)ufs_bmap }, /* bmap */
131	{ &vop_strategy_desc, (VOPFUNC)ufs_strategy }, /* strategy */
132	{ &vop_print_desc, (VOPFUNC)ufs_print }, /* print */
133	{ &vop_islocked_desc, (VOPFUNC)ufs_islocked }, /* islocked */
134	{ &vop_pathconf_desc, (VOPFUNC)ufs_pathconf }, /* pathconf */
135	{ &vop_advlock_desc, (VOPFUNC)ufs_advlock }, /* advlock */
136	{ &vop_blkatoff_desc, (VOPFUNC)ffs_blkatoff }, /* blkatoff */
137	{ &vop_valloc_desc, (VOPFUNC)ffs_valloc }, /* valloc */
138	{ &vop_reallocblks_desc, (VOPFUNC)ffs_reallocblks }, /* reallocblks */
139	{ &vop_vfree_desc, (VOPFUNC)ffs_vfree }, /* vfree */
140	{ &vop_truncate_desc, (VOPFUNC)ffs_truncate }, /* truncate */
141	{ &vop_update_desc, (VOPFUNC)ffs_update }, /* update */
142	{ &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
143	{ &vop_pagein_desc, (VOPFUNC)ffs_pagein }, /* Pagein */
144	{ &vop_pageout_desc, (VOPFUNC)ffs_pageout }, /* Pageout */
145	{ &vop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copy File */
146	{ &vop_blktooff_desc, (VOPFUNC)ffs_blktooff }, /* blktooff */
147	{ &vop_offtoblk_desc, (VOPFUNC)ffs_offtoblk }, /* offtoblk */
148	{ &vop_cmap_desc, (VOPFUNC)ufs_cmap }, /* cmap */
149	{ (struct vnodeop_desc)NULL, (int()())NULL }
150	};
151	struct vnodeopv_desc ffs_vnodeop_opv_desc =
152	{ &ffs_vnodeop_p, ffs_vnodeop_entries };
153
154	int (*ffs_specop_p)(void );
155	struct vnodeopv_entry_desc ffs_specop_entries[] = {
156	{ &vop_default_desc, (VOPFUNC)vn_default_error },
157	{ &vop_lookup_desc, (VOPFUNC)spec_lookup }, /* lookup */
158	{ &vop_create_desc, (VOPFUNC)spec_create }, /* create */
159	{ &vop_mknod_desc, (VOPFUNC)spec_mknod }, /* mknod */
160	{ &vop_open_desc, (VOPFUNC)spec_open }, /* open */
161	{ &vop_close_desc, (VOPFUNC)ufsspec_close }, /* close */
162	{ &vop_access_desc, (VOPFUNC)ufs_access }, /* access */
163	{ &vop_getattr_desc, (VOPFUNC)ufs_getattr }, /* getattr */
164	{ &vop_setattr_desc, (VOPFUNC)ufs_setattr }, /* setattr */
165	{ &vop_read_desc, (VOPFUNC)ufsspec_read }, /* read */
166	{ &vop_write_desc, (VOPFUNC)ufsspec_write }, /* write */
167	{ &vop_lease_desc, (VOPFUNC)spec_lease_check }, /* lease */
168	{ &vop_ioctl_desc, (VOPFUNC)spec_ioctl }, /* ioctl */
169	{ &vop_select_desc, (VOPFUNC)spec_select }, /* select */
170	{ &vop_revoke_desc, (VOPFUNC)spec_revoke }, /* revoke */
171	{ &vop_mmap_desc, (VOPFUNC)spec_mmap }, /* mmap */
172	{ &vop_fsync_desc, (VOPFUNC)ffs_fsync }, /* fsync */
173	{ &vop_seek_desc, (VOPFUNC)spec_seek }, /* seek */
174	{ &vop_remove_desc, (VOPFUNC)spec_remove }, /* remove */
175	{ &vop_link_desc, (VOPFUNC)spec_link }, /* link */
176	{ &vop_rename_desc, (VOPFUNC)spec_rename }, /* rename */
177	{ &vop_mkdir_desc, (VOPFUNC)spec_mkdir }, /* mkdir */
178	{ &vop_rmdir_desc, (VOPFUNC)spec_rmdir }, /* rmdir */
179	{ &vop_symlink_desc, (VOPFUNC)spec_symlink }, /* symlink */
180	{ &vop_readdir_desc, (VOPFUNC)spec_readdir }, /* readdir */
181	{ &vop_readlink_desc, (VOPFUNC)spec_readlink }, /* readlink */
182	{ &vop_abortop_desc, (VOPFUNC)spec_abortop }, /* abortop */
183	{ &vop_inactive_desc, (VOPFUNC)ufs_inactive }, /* inactive */
184	{ &vop_reclaim_desc, (VOPFUNC)ffs_reclaim }, /* reclaim */
185	{ &vop_lock_desc, (VOPFUNC)ufs_lock }, /* lock */
186	{ &vop_unlock_desc, (VOPFUNC)ufs_unlock }, /* unlock */
187	{ &vop_bmap_desc, (VOPFUNC)spec_bmap }, /* bmap */
188	{ &vop_strategy_desc, (VOPFUNC)spec_strategy }, /* strategy */
189	{ &vop_print_desc, (VOPFUNC)ufs_print }, /* print */
190	{ &vop_islocked_desc, (VOPFUNC)ufs_islocked }, /* islocked */
191	{ &vop_pathconf_desc, (VOPFUNC)spec_pathconf }, /* pathconf */
192	{ &vop_advlock_desc, (VOPFUNC)spec_advlock }, /* advlock */
193	{ &vop_blkatoff_desc, (VOPFUNC)spec_blkatoff }, /* blkatoff */
194	{ &vop_valloc_desc, (VOPFUNC)spec_valloc }, /* valloc */
195	{ &vop_reallocblks_desc, (VOPFUNC)spec_reallocblks }, /* reallocblks */
196	{ &vop_vfree_desc, (VOPFUNC)ffs_vfree }, /* vfree */
197	{ &vop_truncate_desc, (VOPFUNC)spec_truncate }, /* truncate */
198	{ &vop_update_desc, (VOPFUNC)ffs_update }, /* update */
199	{ &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
200	{ &vop_devblocksize_desc, (VOPFUNC)spec_devblocksize }, /* devblocksize */
201	{ &vop_pagein_desc, (VOPFUNC)ffs_pagein }, /* Pagein */
202	{ &vop_pageout_desc, (VOPFUNC)ffs_pageout }, /* Pageout */
203	{ &vop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copy File */
204	{ &vop_blktooff_desc, (VOPFUNC)ffs_blktooff }, /* blktooff */
205	{ &vop_offtoblk_desc, (VOPFUNC)ffs_offtoblk }, /* offtoblk */
206	{ &vop_cmap_desc, (VOPFUNC)spec_cmap }, /* cmap */
207	{ (struct vnodeop_desc)NULL, (int()())NULL }
208	};
209	struct vnodeopv_desc ffs_specop_opv_desc =
210	{ &ffs_specop_p, ffs_specop_entries };
211
212	#if FIFO
213	int (*ffs_fifoop_p)(void );
214	struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
215	{ &vop_default_desc, (VOPFUNC)vn_default_error },
216	{ &vop_lookup_desc, (VOPFUNC)fifo_lookup }, /* lookup */
217	{ &vop_create_desc, (VOPFUNC)fifo_create }, /* create */
218	{ &vop_mknod_desc, (VOPFUNC)fifo_mknod }, /* mknod */
219	{ &vop_open_desc, (VOPFUNC)fifo_open }, /* open */
220	{ &vop_close_desc, (VOPFUNC)ufsfifo_close }, /* close */
221	{ &vop_access_desc, (VOPFUNC)ufs_access }, /* access */
222	{ &vop_getattr_desc, (VOPFUNC)ufs_getattr }, /* getattr */
223	{ &vop_setattr_desc, (VOPFUNC)ufs_setattr }, /* setattr */
224	{ &vop_read_desc, (VOPFUNC)ufsfifo_read }, /* read */
225	{ &vop_write_desc, (VOPFUNC)ufsfifo_write }, /* write */
226	{ &vop_lease_desc, (VOPFUNC)fifo_lease_check }, /* lease */
227	{ &vop_ioctl_desc, (VOPFUNC)fifo_ioctl }, /* ioctl */
228	{ &vop_select_desc, (VOPFUNC)fifo_select }, /* select */
229	{ &vop_revoke_desc, (VOPFUNC)fifo_revoke }, /* revoke */
230	{ &vop_mmap_desc, (VOPFUNC)fifo_mmap }, /* mmap */
231	{ &vop_fsync_desc, (VOPFUNC)ffs_fsync }, /* fsync */
232	{ &vop_seek_desc, (VOPFUNC)fifo_seek }, /* seek */
233	{ &vop_remove_desc, (VOPFUNC)fifo_remove }, /* remove */
234	{ &vop_link_desc, (VOPFUNC)fifo_link }, /* link */
235	{ &vop_rename_desc, (VOPFUNC)fifo_rename }, /* rename */
236	{ &vop_mkdir_desc, (VOPFUNC)fifo_mkdir }, /* mkdir */
237	{ &vop_rmdir_desc, (VOPFUNC)fifo_rmdir }, /* rmdir */
238	{ &vop_symlink_desc, (VOPFUNC)fifo_symlink }, /* symlink */
239	{ &vop_readdir_desc, (VOPFUNC)fifo_readdir }, /* readdir */
240	{ &vop_readlink_desc, (VOPFUNC)fifo_readlink }, /* readlink */
241	{ &vop_abortop_desc, (VOPFUNC)fifo_abortop }, /* abortop */
242	{ &vop_inactive_desc, (VOPFUNC)ufs_inactive }, /* inactive */
243	{ &vop_reclaim_desc, (VOPFUNC)ffs_reclaim }, /* reclaim */
244	{ &vop_lock_desc, (VOPFUNC)ufs_lock }, /* lock */
245	{ &vop_unlock_desc, (VOPFUNC)ufs_unlock }, /* unlock */
246	{ &vop_bmap_desc, (VOPFUNC)fifo_bmap }, /* bmap */
247	{ &vop_strategy_desc, (VOPFUNC)fifo_strategy }, /* strategy */
248	{ &vop_print_desc, (VOPFUNC)ufs_print }, /* print */
249	{ &vop_islocked_desc, (VOPFUNC)ufs_islocked }, /* islocked */
250	{ &vop_pathconf_desc, (VOPFUNC)fifo_pathconf }, /* pathconf */
251	{ &vop_advlock_desc, (VOPFUNC)fifo_advlock }, /* advlock */
252	{ &vop_blkatoff_desc, (VOPFUNC)fifo_blkatoff }, /* blkatoff */
253	{ &vop_valloc_desc, (VOPFUNC)fifo_valloc }, /* valloc */
254	{ &vop_reallocblks_desc, (VOPFUNC)fifo_reallocblks }, /* reallocblks */
255	{ &vop_vfree_desc, (VOPFUNC)ffs_vfree }, /* vfree */
256	{ &vop_truncate_desc, (VOPFUNC)fifo_truncate }, /* truncate */
257	{ &vop_update_desc, (VOPFUNC)ffs_update }, /* update */
258	{ &vop_bwrite_desc, (VOPFUNC)vn_bwrite },
259	{ &vop_pagein_desc, (VOPFUNC)ffs_pagein }, /* Pagein */
260	{ &vop_pageout_desc, (VOPFUNC)ffs_pageout }, /* Pageout */
261	{ &vop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copy File */
262	{ &vop_blktooff_desc, (VOPFUNC)ffs_blktooff }, /* blktooff */
263	{ &vop_offtoblk_desc, (VOPFUNC)ffs_offtoblk }, /* offtoblk */
264	{ &vop_cmap_desc, (VOPFUNC)ufs_cmap }, /* cmap */
265	{ (struct vnodeop_desc)NULL, (int()())NULL }
266	};
267	struct vnodeopv_desc ffs_fifoop_opv_desc =
268	{ &ffs_fifoop_p, ffs_fifoop_entries };
269	#endif /* FIFO */
270
271	/*
272	* Enabling cluster read/write operations.
273	*/
274	int doclusterread = 0;
275	int doclusterwrite = 0;
276
277	#include <ufs/ufs/ufs_readwrite.c>
278
279	/*
280	* Synch an open file.
281	*/
282	/* ARGSUSED */
283	int
284	ffs_fsync(ap)
285	struct vop_fsync_args /* {
286	struct vnode *a_vp;
287	struct ucred *a_cred;
288	int a_waitfor;
289	struct proc *a_p;
290	} / ap;
291	{
292	register struct vnode *vp = ap->a_vp;
293	register struct buf *bp;
294	struct timeval tv;
295	struct buf *nbp;
296	int s;
297	struct inode *ip = VTOI(vp);
298
299	/*
300	* Write out any clusters.
301	*/
302	cluster_push(vp);
303
1c79356b A	304	/*
	305	* Flush all dirty buffers associated with a vnode.
	306	*/
	307	loop:
	308	s = splbio();
	309	for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
	310	nbp = bp->b_vnbufs.le_next;
	311	if ((bp->b_flags & B_BUSY))
	312	continue;
	313	if ((bp->b_flags & B_DELWRI) == 0)
	314	panic("ffs_fsync: not dirty");
	315	bremfree(bp);
	316	bp->b_flags \|= B_BUSY;
	317	splx(s);
	318	/*
	319	* Wait for I/O associated with indirect blocks to complete,
	320	* since there is no way to quickly wait for them below.
	321	*/
	322	if (bp->b_vp == vp \|\| ap->a_waitfor == MNT_NOWAIT)
	323	(void) bawrite(bp);
	324	else
	325	(void) bwrite(bp);
	326	goto loop;
	327	}
	328	if (vp->v_flag & VHASDIRTY)
	329	ubc_pushdirty(vp);
	330
	331	if (ap->a_waitfor == MNT_WAIT) {
	332	while (vp->v_numoutput) {
	333	vp->v_flag \|= VBWAIT;
	334	tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "ffs_fsync", 0);
	335	}
	336
	337	/* I have seen this happen for swapfile. So it is safer to
	338	* check for dirty buffers again. --Umesh
	339	*/
	340	if (vp->v_dirtyblkhd.lh_first \|\| (vp->v_flag & VHASDIRTY)) {
	341	vprint("ffs_fsync: dirty", vp);
	342	splx(s);
	343	goto loop;
	344	}
	345	}
	346	splx(s);
	347	tv = time;
	348	return (VOP_UPDATE(ap->a_vp, &tv, &tv, ap->a_waitfor == MNT_WAIT));
	349	}
	350
	351	/*
	352	* Reclaim an inode so that it can be used for other purposes.
	353	*/
	354	int
	355	ffs_reclaim(ap)
	356	struct vop_reclaim_args /* {
	357	struct vnode *a_vp;
	358	struct proc *a_p;
	359	} / ap;
	360	{
	361	register struct vnode *vp = ap->a_vp;
	362	int error;
	363
	364	if (error = ufs_reclaim(vp, ap->a_p))
	365	return (error);
	366	FREE_ZONE(vp->v_data, sizeof (struct inode),
	367	VFSTOUFS(vp->v_mount)->um_devvp->v_tag == VT_MFS ?
368	M_MFSNODE : M_FFSNODE);
369	vp->v_data = NULL;
370	return (0);
371	}
372
373	/* Blktooff converts a logical block number to a file offset */
374	int
375	ffs_blktooff(ap)
376	struct vop_blktooff_args /* {
377	struct vnode *a_vp;
378	daddr_t a_lblkno;
379	off_t *a_offset;
380	} / ap;
381	{
382	register struct inode *ip;
383	register FS *fs;
384	ufs_daddr_t bn;
385
386
387	if (ap->a_vp == NULL)
388	return (EINVAL);
389
390	ip = VTOI(ap->a_vp);
391	fs = ip->I_FS;
392	bn = ap->a_lblkno;
393
394	if ((long)bn < 0) {
395	panic("-ve blkno in ffs_blktooff");
396	bn = -(long)bn;
397	}
398
399	*ap->a_offset = (off_t)lblktosize(fs, bn);
400	return (0);
401	}
402
403	/* Blktooff converts a logical block number to a file offset */
404	int
405	ffs_offtoblk(ap)
406	struct vop_offtoblk_args /* {
407	struct vnode *a_vp;
408	off_t a_offset;
409	daddr_t *a_lblkno;
410	} / ap;
411	{
412	register struct inode *ip;
413	register FS *fs;
414
415	if (ap->a_vp == NULL)
416	return (EINVAL);
417
418	ip = VTOI(ap->a_vp);
419	fs = ip->I_FS;
420
421	*ap->a_lblkno = (daddr_t)lblkno(fs, ap->a_offset);
422	return (0);
423	}