mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 16:16:46 +07:00
051e7cd44a
Currently xfs has a rather complicated internal scheme to allow for different directory formats in IRIX. This patch rips all code related to this out and pushes useage of the Linux filldir callback into the lowlevel directory code. This does not make the code any less portable because filldir can be used to create dirents of all possible variations (including the IRIX ones as proved by the IRIX binary emulation code under arch/mips/). This patch get rid of an unessecary copy in the readdir path, about 400 lines of code and one of the last two users of the uio structure. This version is updated to deal with dmapi aswell which greatly simplifies the get_dirattrs code. The dmapi part has been tested using the get_dirattrs tools from the xfstest dmapi suite1 with various small and large directories. SGI-PV: 968563 SGI-Modid: xfs-linux-melb:xfs-kern:29478a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
450 lines
11 KiB
C
450 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 <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;
|
|
bhv_vnode_t *vp = vn_from_inode(file->f_path.dentry->d_inode);
|
|
|
|
BUG_ON(iocb->ki_pos != pos);
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
return bhv_vop_read(vp, iocb, iov, nr_segs, &iocb->ki_pos,
|
|
ioflags, NULL);
|
|
}
|
|
|
|
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;
|
|
struct inode *inode = file->f_mapping->host;
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
BUG_ON(iocb->ki_pos != pos);
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
return bhv_vop_write(vp, iocb, iov, nr_segs, &iocb->ki_pos,
|
|
ioflags, NULL);
|
|
}
|
|
|
|
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 bhv_vop_splice_read(vn_from_inode(infilp->f_path.dentry->d_inode),
|
|
infilp, ppos, pipe, len, flags, 0, NULL);
|
|
}
|
|
|
|
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 bhv_vop_splice_read(vn_from_inode(infilp->f_path.dentry->d_inode),
|
|
infilp, ppos, pipe, len, flags, IO_INVIS,
|
|
NULL);
|
|
}
|
|
|
|
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 bhv_vop_splice_write(vn_from_inode(outfilp->f_path.dentry->d_inode),
|
|
pipe, outfilp, ppos, len, flags, 0, NULL);
|
|
}
|
|
|
|
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 bhv_vop_splice_write(vn_from_inode(outfilp->f_path.dentry->d_inode),
|
|
pipe, outfilp, ppos, len, flags, IO_INVIS,
|
|
NULL);
|
|
}
|
|
|
|
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 -bhv_vop_open(vn_from_inode(inode), NULL);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_file_release(
|
|
struct inode *inode,
|
|
struct file *filp)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(inode);
|
|
|
|
if (vp)
|
|
return -bhv_vop_release(vp);
|
|
return 0;
|
|
}
|
|
|
|
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 -bhv_vop_fsync(vp, flags, NULL, (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;
|
|
bhv_vnode_t *vp = vn_from_inode(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 = bhv_vop_readdir(vp, 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 = bhv_vop_ioctl(vp, 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 = bhv_vop_ioctl(vp, 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 */
|