patch-2.4.27 linux-2.4.27/fs/xfs/linux/xfs_file.c

• Lines: 439
• Date: 1969-12-31 16:00:00.000000000 -0800
• Orig file: linux-2.4.26/fs/xfs/linux/xfs_file.c
• Orig date: 2004-04-14 06:05:40.000000000 -0700

diff -urN linux-2.4.26/fs/xfs/linux/xfs_file.c linux-2.4.27/fs/xfs/linux/xfs_file.c
@@ -1,438 +0,0 @@
-/*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 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.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like.  Any license provided herein, whether implied or
- * otherwise, applies only to this software file.  Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA  94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-
-#include "xfs.h"
-#include "xfs_inum.h"
-#include "xfs_log.h"
-#include "xfs_sb.h"
-#include "xfs_dir.h"
-#include "xfs_dir2.h"
-#include "xfs_trans.h"
-#include "xfs_dmapi.h"
-#include "xfs_mount.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_alloc.h"
-#include "xfs_btree.h"
-#include "xfs_attr_sf.h"
-#include "xfs_dir_sf.h"
-#include "xfs_dir2_sf.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_error.h"
-#include "xfs_rw.h"
-#include <linux/iobuf.h>
-
-#include <linux/dcache.h>
-#include <linux/mman.h> /* for PROT_WRITE */
-
-static struct vm_operations_struct linvfs_file_vm_ops;
-
-STATIC inline ssize_t
-__linvfs_read(
-	struct file	*file,
-	char		*buf,
-	int		ioflags,
-	size_t		size,
-	loff_t		*offset)
-{
-	struct inode	*inode = file->f_dentry->d_inode;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-	size_t		rval;
-
-	if (unlikely(file->f_flags & O_DIRECT)) {
-		ioflags |= IO_ISDIRECT;
-		down_read(&inode->i_alloc_sem);
-		VOP_READ(vp, file, buf, size, offset, ioflags, NULL, rval);
-		up_read(&inode->i_alloc_sem);
-	} else {
-		VOP_READ(vp, file, buf, size, offset, ioflags, NULL, rval);
-	}
-
-	return rval;
-}
-
-STATIC ssize_t
-linvfs_read(
-	struct file	*file,
-	char		*buf,
-	size_t		size,
-	loff_t		*offset)
-{
-	return __linvfs_read(file, buf, 0, size, offset);
-}
-
-STATIC ssize_t
-linvfs_read_invis(
-	struct file	*file,
-	char		*buf,
-	size_t		size,
-	loff_t		*offset)
-{
-	return __linvfs_read(file, buf, IO_INVIS, size, offset);
-}
-
-
-STATIC inline ssize_t
-__linvfs_write(
-	struct file	*file,
-	const char	*buf,
-	int		ioflags,
-	size_t		count,
-	loff_t		*ppos)
-{
-	struct inode	*inode = file->f_dentry->d_inode;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-	loff_t		pos;
-	ssize_t		rval;	/* Use negative errors in this f'n */
-
-	if ((ssize_t) count < 0)
-		return -EINVAL;
-
-	if (!access_ok(VERIFY_READ, buf, count))
-		return -EFAULT;
-
-	pos = *ppos;
-	if (pos < 0)
-		return -EINVAL;
-
-	rval = file->f_error;
-	if (rval) {
-		file->f_error = 0;
-		return rval;
-	}
-
-	/* We allow multiple direct writers in, there is no
-	 * potential call to vmtruncate in that path.
-	 */
-	if (unlikely(file->f_flags & O_DIRECT)) {
-		ioflags |= IO_ISDIRECT;
-		down_read(&inode->i_alloc_sem);
-		VOP_WRITE(vp, file, buf, count, &pos, ioflags, NULL, rval);
-		*ppos = pos;
-		up_read(&inode->i_alloc_sem);
-	} else {
-		down(&inode->i_sem);
-		VOP_WRITE(vp, file, buf, count, &pos, ioflags, NULL, rval);
-		*ppos = pos;
-		up(&inode->i_sem);
-	}
-
-	return rval;
-}
-
-STATIC inline ssize_t
-linvfs_write(
-	struct file	*file,
-	const char	*buf,
-	size_t		count,
-	loff_t		*ppos)
-{
-	return __linvfs_write(file, buf, 0, count, ppos);
-}
-
-STATIC inline ssize_t
-linvfs_write_invis(
-	struct file	*file,
-	const char	*buf,
-	size_t		count,
-	loff_t		*ppos)
-{
-	return __linvfs_write(file, buf, IO_INVIS, count, ppos);
-}
-
-STATIC int
-linvfs_open(
-	struct inode	*inode,
-	struct file	*filp)
-{
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-	int		error;
-
-	if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
-		return -EFBIG;
-
-	ASSERT(vp);
-	VOP_OPEN(vp, NULL, error);
-	return -error;
-}
-
-
-STATIC int
-linvfs_release(
-	struct inode	*inode,
-	struct file	*filp)
-{
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-	int		error = 0;
-
-	if (vp)
-		VOP_RELEASE(vp, error);
-	return -error;
-}
-
-
-STATIC int
-linvfs_fsync(
-	struct file	*filp,
-	struct dentry	*dentry,
-	int		datasync)
-{
-	struct inode	*inode = dentry->d_inode;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-	int		error;
-	int		flags = FSYNC_WAIT;
-
-	if (datasync)
-		flags |= FSYNC_DATA;
-
-	ASSERT(vp);
-	VOP_FSYNC(vp, flags, NULL, (xfs_off_t)0, (xfs_off_t)-1, error);
-	return -error;
-}
-
-/*
- * linvfs_readdir maps to VOP_READDIR().
- * We need to build a uio, cred, ...
- */
-
-#define nextdp(dp)      ((struct xfs_dirent *)((char *)(dp) + (dp)->d_reclen))
-
-STATIC int
-linvfs_readdir(
-	struct file	*filp,
-	void		*dirent,
-	filldir_t	filldir)
-{
-	int		error = 0;
-	vnode_t		*vp;
-	uio_t		uio;
-	iovec_t		iov;
-	int		eof = 0;
-	caddr_t		read_buf;
-	int		namelen, size = 0;
-	size_t		rlen = PAGE_CACHE_SIZE;
-	xfs_off_t	start_offset, curr_offset;
-	xfs_dirent_t	*dbp = NULL;
-
-	vp = LINVFS_GET_VP(filp->f_dentry->d_inode);
-	ASSERT(vp);
-
-	/* Try fairly hard to get memory */
-	do {
-		if ((read_buf = (caddr_t)kmalloc(rlen, GFP_KERNEL)))
-			break;
-		rlen >>= 1;
-	} while (rlen >= 1024);
-
-	if (read_buf == NULL)
-		return -ENOMEM;
-
-	uio.uio_iov = &iov;
-	uio.uio_segflg = UIO_SYSSPACE;
-	curr_offset = filp->f_pos;
-	if (filp->f_pos != 0x7fffffff)
-		uio.uio_offset = filp->f_pos;
-	else
-		uio.uio_offset = 0xffffffff;
-
-	while (!eof) {
-		uio.uio_resid = iov.iov_len = rlen;
-		iov.iov_base = read_buf;
-		uio.uio_iovcnt = 1;
-
-		start_offset = uio.uio_offset;
-
-		VOP_READDIR(vp, &uio, NULL, &eof, error);
-		if ((uio.uio_offset == start_offset) || error) {
-			size = 0;
-			break;
-		}
-
-		size = rlen - uio.uio_resid;
-		dbp = (xfs_dirent_t *)read_buf;
-		while (size > 0) {
-			namelen = strlen(dbp->d_name);
-
-			if (filldir(dirent, dbp->d_name, namelen,
-					(loff_t) curr_offset & 0x7fffffff,
-					(ino_t) dbp->d_ino,
-					DT_UNKNOWN)) {
-				goto done;
-			}
-			size -= dbp->d_reclen;
-			curr_offset = (loff_t)dbp->d_off /* & 0x7fffffff */;
-			dbp = nextdp(dbp);
-		}
-	}
-done:
-	if (!error) {
-		if (size == 0)
-			filp->f_pos = uio.uio_offset & 0x7fffffff;
-		else if (dbp)
-			filp->f_pos = curr_offset;
-	}
-
-	kfree(read_buf);
-	return -error;
-}
-
-STATIC int
-linvfs_file_mmap(
-	struct file	*filp,
-	struct vm_area_struct *vma)
-{
-	struct inode	*ip = filp->f_dentry->d_inode;
-	vnode_t		*vp = LINVFS_GET_VP(ip);
-	vattr_t		va = { .va_mask = XFS_AT_UPDATIME };
-	int		error;
-
-	if ((vp->v_type == VREG) && (vp->v_vfsp->vfs_flag & VFS_DMI)) {
-		xfs_mount_t	*mp = XFS_VFSTOM(vp->v_vfsp);
-
-		error = -XFS_SEND_MMAP(mp, vma, 0);
-		if (error)
-			return error;
-	}
-
-	vma->vm_ops = &linvfs_file_vm_ops;
-
-	VOP_SETATTR(vp, &va, XFS_AT_UPDATIME, NULL, error);
-	return 0;
-}
-
-
-STATIC int
-linvfs_ioctl(
-	struct inode	*inode,
-	struct file	*filp,
-	unsigned int	cmd,
-	unsigned long	arg)
-{
-	int		error;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-
-	ASSERT(vp);
-	VOP_IOCTL(vp, inode, filp, 0, cmd, arg, error);
-	VMODIFY(vp);
-
-	/* NOTE:  some of the ioctl's return positive #'s as a
-	 *	  byte count indicating success, such as
-	 *	  readlink_by_handle.  So we don't "sign flip"
-	 *	  like most other routines.  This means true
-	 *	  errors need to be returned as a negative value.
-	 */
-	return error;
-}
-
-STATIC int
-linvfs_ioctl_invis(
-	struct inode	*inode,
-	struct file	*filp,
-	unsigned int	cmd,
-	unsigned long	arg)
-{
-	int		error;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
-
-	ASSERT(vp);
-	VOP_IOCTL(vp, inode, filp, IO_INVIS, cmd, arg, error);
-	VMODIFY(vp);
-
-	/* NOTE:  some of the ioctl's return positive #'s as a
-	 *	  byte count indicating success, such as
-	 *	  readlink_by_handle.  So we don't "sign flip"
-	 *	  like most other routines.  This means true
-	 *	  errors need to be returned as a negative value.
-	 */
-	return error;
-}
-
-#ifdef HAVE_VMOP_MPROTECT
-STATIC int
-linvfs_mprotect(
-	struct vm_area_struct *vma,
-	unsigned int	newflags)
-{
-	vnode_t		*vp = LINVFS_GET_VP(vma->vm_file->f_dentry->d_inode);
-	int		error = 0;
-
-	if ((vp->v_type == VREG) && (vp->v_vfsp->vfs_flag & VFS_DMI)) {
-		if ((vma->vm_flags & VM_MAYSHARE) &&
-		    (newflags & PROT_WRITE) && !(vma->vm_flags & PROT_WRITE)) {
-			xfs_mount_t	*mp = XFS_VFSTOM(vp->v_vfsp);
-
-			error = XFS_SEND_MMAP(mp, vma, VM_WRITE);
-		    }
-	}
-	return error;
-}
-#endif /* HAVE_VMOP_MPROTECT */
-
-
-struct file_operations linvfs_file_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= linvfs_read,
-	.write		= linvfs_write,
-	.ioctl		= linvfs_ioctl,
-	.mmap		= linvfs_file_mmap,
-	.open		= linvfs_open,
-	.release	= linvfs_release,
-	.fsync		= linvfs_fsync,
-};
-
-struct file_operations linvfs_invis_file_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= linvfs_read_invis,
-	.write		= linvfs_write_invis,
-	.ioctl		= linvfs_ioctl_invis,
-	.mmap		= linvfs_file_mmap,
-	.open		= linvfs_open,
-	.release	= linvfs_release,
-	.fsync		= linvfs_fsync,
-};
-
-
-struct file_operations linvfs_dir_operations = {
-	.read		= generic_read_dir,
-	.readdir	= linvfs_readdir,
-	.ioctl		= linvfs_ioctl,
-	.fsync		= linvfs_fsync,
-};
-
-static struct vm_operations_struct linvfs_file_vm_ops = {
-	.nopage		= filemap_nopage,
-#ifdef HAVE_VMOP_MPROTECT
-	.mprotect	= linvfs_mprotect,
-#endif
-};