611 lines
13 KiB
C
611 lines
13 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_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 "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,
|
|
char __user *buf,
|
|
int ioflags,
|
|
size_t count,
|
|
loff_t pos)
|
|
{
|
|
struct iovec iov = {buf, count};
|
|
struct file *file = iocb->ki_filp;
|
|
vnode_t *vp = LINVFS_GET_VP(file->f_dentry->d_inode);
|
|
ssize_t rval;
|
|
|
|
BUG_ON(iocb->ki_pos != pos);
|
|
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
VOP_READ(vp, iocb, &iov, 1, &iocb->ki_pos, ioflags, NULL, rval);
|
|
return rval;
|
|
}
|
|
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_read(
|
|
struct kiocb *iocb,
|
|
char __user *buf,
|
|
size_t count,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_read(iocb, buf, IO_ISAIO, count, pos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_read_invis(
|
|
struct kiocb *iocb,
|
|
char __user *buf,
|
|
size_t count,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_read(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
|
|
}
|
|
|
|
|
|
STATIC inline ssize_t
|
|
__xfs_file_write(
|
|
struct kiocb *iocb,
|
|
const char __user *buf,
|
|
int ioflags,
|
|
size_t count,
|
|
loff_t pos)
|
|
{
|
|
struct iovec iov = {(void __user *)buf, count};
|
|
struct file *file = iocb->ki_filp;
|
|
struct inode *inode = file->f_mapping->host;
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
ssize_t rval;
|
|
|
|
BUG_ON(iocb->ki_pos != pos);
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
|
|
VOP_WRITE(vp, iocb, &iov, 1, &iocb->ki_pos, ioflags, NULL, rval);
|
|
return rval;
|
|
}
|
|
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_write(
|
|
struct kiocb *iocb,
|
|
const char __user *buf,
|
|
size_t count,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_write(iocb, buf, IO_ISAIO, count, pos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_aio_write_invis(
|
|
struct kiocb *iocb,
|
|
const char __user *buf,
|
|
size_t count,
|
|
loff_t pos)
|
|
{
|
|
return __xfs_file_write(iocb, buf, IO_ISAIO|IO_INVIS, count, pos);
|
|
}
|
|
|
|
|
|
STATIC inline ssize_t
|
|
__xfs_file_readv(
|
|
struct file *file,
|
|
const struct iovec *iov,
|
|
int ioflags,
|
|
unsigned long nr_segs,
|
|
loff_t *ppos)
|
|
{
|
|
struct inode *inode = file->f_mapping->host;
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
struct kiocb *kiocb;
|
|
ssize_t rval;
|
|
|
|
kiocb = kmalloc(sizeof(*kiocb), GFP_KERNEL);
|
|
if (unlikely(!kiocb))
|
|
return -ENOMEM;
|
|
|
|
init_sync_kiocb(kiocb, file);
|
|
kiocb->ki_pos = *ppos;
|
|
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
VOP_READ(vp, kiocb, iov, nr_segs, &kiocb->ki_pos, ioflags, NULL, rval);
|
|
|
|
*ppos = kiocb->ki_pos;
|
|
kfree(kiocb);
|
|
return rval;
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_readv(
|
|
struct file *file,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t *ppos)
|
|
{
|
|
return __xfs_file_readv(file, iov, 0, nr_segs, ppos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_readv_invis(
|
|
struct file *file,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t *ppos)
|
|
{
|
|
return __xfs_file_readv(file, iov, IO_INVIS, nr_segs, ppos);
|
|
}
|
|
|
|
|
|
STATIC inline ssize_t
|
|
__xfs_file_writev(
|
|
struct file *file,
|
|
const struct iovec *iov,
|
|
int ioflags,
|
|
unsigned long nr_segs,
|
|
loff_t *ppos)
|
|
{
|
|
struct inode *inode = file->f_mapping->host;
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
struct kiocb *kiocb;
|
|
ssize_t rval;
|
|
|
|
kiocb = kmalloc(sizeof(*kiocb), GFP_KERNEL);
|
|
if (unlikely(!kiocb))
|
|
return -ENOMEM;
|
|
|
|
init_sync_kiocb(kiocb, file);
|
|
kiocb->ki_pos = *ppos;
|
|
if (unlikely(file->f_flags & O_DIRECT))
|
|
ioflags |= IO_ISDIRECT;
|
|
|
|
VOP_WRITE(vp, kiocb, iov, nr_segs, &kiocb->ki_pos, ioflags, NULL, rval);
|
|
|
|
*ppos = kiocb->ki_pos;
|
|
kfree(kiocb);
|
|
return rval;
|
|
}
|
|
|
|
|
|
STATIC ssize_t
|
|
xfs_file_writev(
|
|
struct file *file,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t *ppos)
|
|
{
|
|
return __xfs_file_writev(file, iov, 0, nr_segs, ppos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_writev_invis(
|
|
struct file *file,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t *ppos)
|
|
{
|
|
return __xfs_file_writev(file, iov, IO_INVIS, nr_segs, ppos);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_file_sendfile(
|
|
struct file *filp,
|
|
loff_t *ppos,
|
|
size_t count,
|
|
read_actor_t actor,
|
|
void *target)
|
|
{
|
|
vnode_t *vp = LINVFS_GET_VP(filp->f_dentry->d_inode);
|
|
ssize_t rval;
|
|
|
|
VOP_SENDFILE(vp, filp, ppos, 0, count, actor, target, NULL, rval);
|
|
return rval;
|
|
}
|
|
|
|
|
|
STATIC int
|
|
xfs_file_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
|
|
xfs_file_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
|
|
xfs_file_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;
|
|
}
|
|
|
|
/*
|
|
* xfs_file_readdir maps to VOP_READDIR().
|
|
* We need to build a uio, cred, ...
|
|
*/
|
|
|
|
#define nextdp(dp) ((struct xfs_dirent *)((char *)(dp) + (dp)->d_reclen))
|
|
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
|
|
STATIC struct page *
|
|
xfs_vm_nopage(
|
|
struct vm_area_struct *area,
|
|
unsigned long address,
|
|
int *type)
|
|
{
|
|
struct inode *inode = area->vm_file->f_dentry->d_inode;
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
xfs_mount_t *mp = XFS_VFSTOM(vp->v_vfsp);
|
|
int error;
|
|
|
|
ASSERT_ALWAYS(vp->v_vfsp->vfs_flag & VFS_DMI);
|
|
|
|
error = XFS_SEND_MMAP(mp, area, 0);
|
|
if (error)
|
|
return NULL;
|
|
|
|
return filemap_nopage(area, address, type);
|
|
}
|
|
|
|
#endif /* CONFIG_XFS_DMAPI */
|
|
|
|
|
|
STATIC int
|
|
xfs_file_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
|
|
xfs_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 *vattr;
|
|
int error;
|
|
|
|
vma->vm_ops = &xfs_file_vm_ops;
|
|
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
if (vp->v_vfsp->vfs_flag & VFS_DMI) {
|
|
vma->vm_ops = &xfs_dmapi_file_vm_ops;
|
|
}
|
|
#endif /* CONFIG_XFS_DMAPI */
|
|
|
|
vattr = kmalloc(sizeof(*vattr), GFP_KERNEL);
|
|
if (unlikely(!vattr))
|
|
return -ENOMEM;
|
|
vattr->va_mask = XFS_AT_UPDATIME;
|
|
VOP_SETATTR(vp, vattr, XFS_AT_UPDATIME, NULL, error);
|
|
if (likely(!error))
|
|
__vn_revalidate(vp, vattr); /* update flags */
|
|
kfree(vattr);
|
|
return 0;
|
|
}
|
|
|
|
|
|
STATIC long
|
|
xfs_file_ioctl(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int error;
|
|
struct inode *inode = filp->f_dentry->d_inode;
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
|
|
VOP_IOCTL(vp, inode, filp, 0, cmd, (void __user *)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 long
|
|
xfs_file_ioctl_invis(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int error;
|
|
struct inode *inode = filp->f_dentry->d_inode;
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
|
|
ASSERT(vp);
|
|
VOP_IOCTL(vp, inode, filp, IO_INVIS, cmd, (void __user *)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 CONFIG_XFS_DMAPI
|
|
#ifdef HAVE_VMOP_MPROTECT
|
|
STATIC int
|
|
xfs_vm_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_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)
|
|
{
|
|
vnode_t *vp = LINVFS_GET_VP(inode);
|
|
xfs_mount_t *mp = XFS_VFSTOM(vp->v_vfsp);
|
|
int error = 0;
|
|
xfs_inode_t *ip;
|
|
|
|
if (vp->v_vfsp->vfs_flag & VFS_DMI) {
|
|
ip = xfs_vtoi(vp);
|
|
if (!ip) {
|
|
error = -EINVAL;
|
|
goto open_exec_out;
|
|
}
|
|
if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ)) {
|
|
error = -XFS_SEND_DATA(mp, DM_EVENT_READ, vp,
|
|
0, 0, 0, NULL);
|
|
}
|
|
}
|
|
open_exec_out:
|
|
return error;
|
|
}
|
|
#endif /* HAVE_FOP_OPEN_EXEC */
|
|
|
|
struct file_operations xfs_file_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.write = do_sync_write,
|
|
.readv = xfs_file_readv,
|
|
.writev = xfs_file_writev,
|
|
.aio_read = xfs_file_aio_read,
|
|
.aio_write = xfs_file_aio_write,
|
|
.sendfile = xfs_file_sendfile,
|
|
.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
|
|
};
|
|
|
|
struct file_operations xfs_invis_file_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.write = do_sync_write,
|
|
.readv = xfs_file_readv_invis,
|
|
.writev = xfs_file_writev_invis,
|
|
.aio_read = xfs_file_aio_read_invis,
|
|
.aio_write = xfs_file_aio_write_invis,
|
|
.sendfile = xfs_file_sendfile,
|
|
.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,
|
|
};
|
|
|
|
|
|
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 = {
|
|
.nopage = filemap_nopage,
|
|
.populate = filemap_populate,
|
|
};
|
|
|
|
#ifdef CONFIG_XFS_DMAPI
|
|
static struct vm_operations_struct xfs_dmapi_file_vm_ops = {
|
|
.nopage = xfs_vm_nopage,
|
|
.populate = filemap_populate,
|
|
#ifdef HAVE_VMOP_MPROTECT
|
|
.mprotect = xfs_vm_mprotect,
|
|
#endif
|
|
};
|
|
#endif /* CONFIG_XFS_DMAPI */
|