mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 02:19:51 +00:00
![Christoph Hellwig](/assets/img/avatar_default.png)
All flags are added to xfs_mount's m_flag instead. Note that the 32bit inode flag was duplicated in both of them, but only cleared in the mount when it was not nessecary due to the filesystem beeing small enough. Two flags are still required here - one to indicate the mount option setting, and one to indicate if it applies or not. SGI-PV: 969608 SGI-Modid: xfs-linux-melb:xfs-kern:29507a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
435 lines
10 KiB
C
435 lines
10 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)
|
|
{
|
|
int flags = FSYNC_WAIT;
|
|
|
|
if (datasync)
|
|
flags |= FSYNC_DATA;
|
|
xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED);
|
|
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 (XFS_M(filp->f_path.dentry->d_inode->i_sb)->m_flags & XFS_MOUNT_DMAPI)
|
|
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;
|
|
|
|
error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
|
|
xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
|
|
|
|
/* 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;
|
|
|
|
error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p);
|
|
xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
|
|
|
|
/* 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)
|
|
{
|
|
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
|
|
struct xfs_mount *mp = XFS_M(inode->i_sb);
|
|
int error = 0;
|
|
|
|
if (mp->m_flags & XFS_MOUNT_DMAPI) {
|
|
if ((vma->vm_flags & VM_MAYSHARE) &&
|
|
(newflags & VM_WRITE) && !(vma->vm_flags & VM_WRITE))
|
|
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)
|
|
{
|
|
struct xfs_mount *mp = XFS_M(inode->i_sb);
|
|
|
|
if (unlikely(mp->m_flags & XFS_MOUNT_DMAPI)) {
|
|
if (DM_EVENT_ENABLED(XFS_I(inode), DM_EVENT_READ)) {
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
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 */
|