739bfb2a7d
SGI-PV: 969608 SGI-Modid: xfs-linux-melb:xfs-kern:29493a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
442 lines
11 KiB
C
442 lines
11 KiB
C
/*
|
|
* Copyright (c) 2000-2005 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
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_bit.h"
|
|
#include "xfs_log.h"
|
|
#include "xfs_inum.h"
|
|
#include "xfs_sb.h"
|
|
#include "xfs_ag.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_dir2_sf.h"
|
|
#include "xfs_dinode.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_error.h"
|
|
#include "xfs_rw.h"
|
|
#include "xfs_ioctl32.h"
|
|
#include "xfs_vnodeops.h"
|
|
|
|
#include <linux/dcache.h>
|
|
#include <linux/smp_lock.h>
|
|
|
|
static struct vm_operations_struct xfs_file_vm_ops;
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
static struct vm_operations_struct xfs_dmapi_file_vm_ops;
|
|
#endif
|
|
|
|
STATIC_INLINE ssize_t
|
|
__xfs_file_read(
|
|
struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
int ioflags,
|
|
loff_t pos)
|
|
{
|
|
struct file *file = iocb->ki_filp;
|
|
|
|
BUG_ON(iocb->ki_pos != pos);
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov,
|
|
nr_segs, &iocb->ki_pos, ioflags);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_read(
|
|
struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_read_invis(
|
|
struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
|
|
}
|
|
|
|
STATIC_INLINE ssize_t
|
|
__xfs_file_write(
|
|
struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
int ioflags,
|
|
loff_t pos)
|
|
{
|
|
struct file *file = iocb->ki_filp;
|
|
|
|
BUG_ON(iocb->ki_pos != pos);
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs,
|
|
&iocb->ki_pos, ioflags);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_write(
|
|
struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_write_invis(
|
|
struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_splice_read(
|
|
struct file *infilp,
|
|
loff_t *ppos,
|
|
struct pipe_inode_info *pipe,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
|
|
infilp, ppos, pipe, len, flags, 0);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_splice_read_invis(
|
|
struct file *infilp,
|
|
loff_t *ppos,
|
|
struct pipe_inode_info *pipe,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
|
|
infilp, ppos, pipe, len, flags, IO_INVIS);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_splice_write(
|
|
struct pipe_inode_info *pipe,
|
|
struct file *outfilp,
|
|
loff_t *ppos,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
|
|
pipe, outfilp, ppos, len, flags, 0);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_splice_write_invis(
|
|
struct pipe_inode_info *pipe,
|
|
struct file *outfilp,
|
|
loff_t *ppos,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
|
|
pipe, outfilp, ppos, len, flags, IO_INVIS);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_file_open(
|
|
struct inode *inode,
|
|
struct file *filp)
|
|
{
|
|
if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
|
|
return -EFBIG;
|
|
return -xfs_open(XFS_I(inode));
|
|
}
|
|
|
|
STATIC int
|
|
xfs_file_release(
|
|
struct inode *inode,
|
|
struct file *filp)
|
|
{
|
|
return -xfs_release(XFS_I(inode));
|
|
}
|
|
|
|
STATIC int
|
|
xfs_file_fsync(
|
|
struct file *filp,
|
|
struct dentry *dentry,
|
|
int datasync)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
|
|
int flags = FSYNC_WAIT;
|
|
|
|
if (datasync)
|
|
flags |= FSYNC_DATA;
|
|
if (VN_TRUNC(vp))
|
|
VUNTRUNCATE(vp);
|
|
return -xfs_fsync(XFS_I(dentry->d_inode), flags,
|
|
(xfs_off_t)0, (xfs_off_t)-1);
|
|
}
|
|
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
STATIC int
|
|
xfs_vm_fault(
|
|
struct vm_area_struct *vma,
|
|
struct vm_fault *vmf)
|
|
{
|
|
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
ASSERT_ALWAYS(vp->v_vfsp->vfs_flag & VFS_DMI);
|
|
if (XFS_SEND_MMAP(XFS_VFSTOM(vp->v_vfsp), vma, 0))
|
|
return VM_FAULT_SIGBUS;
|
|
return filemap_fault(vma, vmf);
|
|
}
|
|
#endif /* CONFIG_XFS_DMAPI */
|
|
|
|
STATIC int
|
|
xfs_file_readdir(
|
|
struct file *filp,
|
|
void *dirent,
|
|
filldir_t filldir)
|
|
{
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
xfs_inode_t *ip = XFS_I(inode);
|
|
int error;
|
|
size_t bufsize;
|
|
|
|
/*
|
|
* The Linux API doesn't pass down the total size of the buffer
|
|
* we read into down to the filesystem. With the filldir concept
|
|
* it's not needed for correct information, but the XFS dir2 leaf
|
|
* code wants an estimate of the buffer size to calculate it's
|
|
* readahead window and size the buffers used for mapping to
|
|
* physical blocks.
|
|
*
|
|
* Try to give it an estimate that's good enough, maybe at some
|
|
* point we can change the ->readdir prototype to include the
|
|
* buffer size.
|
|
*/
|
|
bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size);
|
|
|
|
error = xfs_readdir(ip, dirent, bufsize,
|
|
(xfs_off_t *)&filp->f_pos, filldir);
|
|
if (error)
|
|
return -error;
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_file_mmap(
|
|
struct file *filp,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
vma->vm_ops = &xfs_file_vm_ops;
|
|
vma->vm_flags |= VM_CAN_NONLINEAR;
|
|
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
if (vn_from_inode(filp->f_path.dentry->d_inode)->v_vfsp->vfs_flag & VFS_DMI)
|
|
vma->vm_ops = &xfs_dmapi_file_vm_ops;
|
|
#endif /* CONFIG_XFS_DMAPI */
|
|
|
|
file_accessed(filp);
|
|
return 0;
|
|
}
|
|
|
|
STATIC long
|
|
xfs_file_ioctl(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long p)
|
|
{
|
|
int error;
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
|
|
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 long
|
|
xfs_file_ioctl_invis(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long p)
|
|
{
|
|
int error;
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p);
|
|
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 CONFIG_XFS_DMAPI
|
|
#ifdef HAVE_VMOP_MPROTECT
|
|
STATIC int
|
|
xfs_vm_mprotect(
|
|
struct vm_area_struct *vma,
|
|
unsigned int newflags)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(vma->vm_file->f_path.dentry->d_inode);
|
|
int error = 0;
|
|
|
|
if (vp->v_vfsp->vfs_flag & VFS_DMI) {
|
|
if ((vma->vm_flags & VM_MAYSHARE) &&
|
|
(newflags & VM_WRITE) && !(vma->vm_flags & VM_WRITE)) {
|
|
xfs_mount_t *mp = XFS_VFSTOM(vp->v_vfsp);
|
|
|
|
error = XFS_SEND_MMAP(mp, vma, VM_WRITE);
|
|
}
|
|
}
|
|
return error;
|
|
}
|
|
#endif /* HAVE_VMOP_MPROTECT */
|
|
#endif /* CONFIG_XFS_DMAPI */
|
|
|
|
#ifdef HAVE_FOP_OPEN_EXEC
|
|
/* If the user is attempting to execute a file that is offline then
|
|
* we have to trigger a DMAPI READ event before the file is marked as busy
|
|
* otherwise the invisible I/O will not be able to write to the file to bring
|
|
* it back online.
|
|
*/
|
|
STATIC int
|
|
xfs_file_open_exec(
|
|
struct inode *inode)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
if (unlikely(vp->v_vfsp->vfs_flag & VFS_DMI)) {
|
|
xfs_mount_t *mp = XFS_VFSTOM(vp->v_vfsp);
|
|
xfs_inode_t *ip = xfs_vtoi(vp);
|
|
|
|
if (!ip)
|
|
return -EINVAL;
|
|
if (DM_EVENT_ENABLED(ip, DM_EVENT_READ))
|
|
return -XFS_SEND_DATA(mp, DM_EVENT_READ, vp,
|
|
0, 0, 0, NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* HAVE_FOP_OPEN_EXEC */
|
|
|
|
/*
|
|
* mmap()d file has taken write protection fault and is being made
|
|
* writable. We can set the page state up correctly for a writable
|
|
* page, which means we can do correct delalloc accounting (ENOSPC
|
|
* checking!) and unwritten extent mapping.
|
|
*/
|
|
STATIC int
|
|
xfs_vm_page_mkwrite(
|
|
struct vm_area_struct *vma,
|
|
struct page *page)
|
|
{
|
|
return block_page_mkwrite(vma, page, xfs_get_blocks);
|
|
}
|
|
|
|
const struct file_operations xfs_file_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.write = do_sync_write,
|
|
.aio_read = xfs_file_aio_read,
|
|
.aio_write = xfs_file_aio_write,
|
|
.splice_read = xfs_file_splice_read,
|
|
.splice_write = xfs_file_splice_write,
|
|
.unlocked_ioctl = xfs_file_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = xfs_file_compat_ioctl,
|
|
#endif
|
|
.mmap = xfs_file_mmap,
|
|
.open = xfs_file_open,
|
|
.release = xfs_file_release,
|
|
.fsync = xfs_file_fsync,
|
|
#ifdef HAVE_FOP_OPEN_EXEC
|
|
.open_exec = xfs_file_open_exec,
|
|
#endif
|
|
};
|
|
|
|
const struct file_operations xfs_invis_file_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.write = do_sync_write,
|
|
.aio_read = xfs_file_aio_read_invis,
|
|
.aio_write = xfs_file_aio_write_invis,
|
|
.splice_read = xfs_file_splice_read_invis,
|
|
.splice_write = xfs_file_splice_write_invis,
|
|
.unlocked_ioctl = xfs_file_ioctl_invis,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = xfs_file_compat_invis_ioctl,
|
|
#endif
|
|
.mmap = xfs_file_mmap,
|
|
.open = xfs_file_open,
|
|
.release = xfs_file_release,
|
|
.fsync = xfs_file_fsync,
|
|
};
|
|
|
|
|
|
const struct file_operations xfs_dir_file_operations = {
|
|
.read = generic_read_dir,
|
|
.readdir = xfs_file_readdir,
|
|
.unlocked_ioctl = xfs_file_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = xfs_file_compat_ioctl,
|
|
#endif
|
|
.fsync = xfs_file_fsync,
|
|
};
|
|
|
|
static struct vm_operations_struct xfs_file_vm_ops = {
|
|
.fault = filemap_fault,
|
|
.page_mkwrite = xfs_vm_page_mkwrite,
|
|
};
|
|
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
static struct vm_operations_struct xfs_dmapi_file_vm_ops = {
|
|
.fault = xfs_vm_fault,
|
|
.page_mkwrite = xfs_vm_page_mkwrite,
|
|
#ifdef HAVE_VMOP_MPROTECT
|
|
.mprotect = xfs_vm_mprotect,
|
|
#endif
|
|
};
|
|
#endif /* CONFIG_XFS_DMAPI */
|