2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "xfs_trans.h"
27 #include "xfs_dmapi.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_alloc_btree.h"
31 #include "xfs_ialloc_btree.h"
32 #include "xfs_alloc.h"
33 #include "xfs_btree.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_dinode.h"
38 #include "xfs_inode.h"
39 #include "xfs_error.h"
41 #include "xfs_ioctl32.h"
43 #include <linux/dcache.h>
44 #include <linux/smp_lock.h>
46 static struct vm_operations_struct xfs_file_vm_ops
;
47 #ifdef CONFIG_XFS_DMAPI
48 static struct vm_operations_struct xfs_dmapi_file_vm_ops
;
59 struct iovec iov
= {buf
, count
};
60 struct file
*file
= iocb
->ki_filp
;
61 vnode_t
*vp
= vn_from_inode(file
->f_dentry
->d_inode
);
64 BUG_ON(iocb
->ki_pos
!= pos
);
66 if (unlikely(file
->f_flags
& O_DIRECT
))
67 ioflags
|= IO_ISDIRECT
;
68 VOP_READ(vp
, iocb
, &iov
, 1, &iocb
->ki_pos
, ioflags
, NULL
, rval
);
80 return __xfs_file_read(iocb
, buf
, IO_ISAIO
, count
, pos
);
84 xfs_file_aio_read_invis(
90 return __xfs_file_read(iocb
, buf
, IO_ISAIO
|IO_INVIS
, count
, pos
);
97 const char __user
*buf
,
102 struct iovec iov
= {(void __user
*)buf
, count
};
103 struct file
*file
= iocb
->ki_filp
;
104 struct inode
*inode
= file
->f_mapping
->host
;
105 vnode_t
*vp
= vn_from_inode(inode
);
108 BUG_ON(iocb
->ki_pos
!= pos
);
109 if (unlikely(file
->f_flags
& O_DIRECT
))
110 ioflags
|= IO_ISDIRECT
;
112 VOP_WRITE(vp
, iocb
, &iov
, 1, &iocb
->ki_pos
, ioflags
, NULL
, rval
);
120 const char __user
*buf
,
124 return __xfs_file_write(iocb
, buf
, IO_ISAIO
, count
, pos
);
128 xfs_file_aio_write_invis(
130 const char __user
*buf
,
134 return __xfs_file_write(iocb
, buf
, IO_ISAIO
|IO_INVIS
, count
, pos
);
138 STATIC
inline ssize_t
141 const struct iovec
*iov
,
143 unsigned long nr_segs
,
146 struct inode
*inode
= file
->f_mapping
->host
;
147 vnode_t
*vp
= vn_from_inode(inode
);
151 init_sync_kiocb(&kiocb
, file
);
152 kiocb
.ki_pos
= *ppos
;
154 if (unlikely(file
->f_flags
& O_DIRECT
))
155 ioflags
|= IO_ISDIRECT
;
156 VOP_READ(vp
, &kiocb
, iov
, nr_segs
, &kiocb
.ki_pos
, ioflags
, NULL
, rval
);
158 *ppos
= kiocb
.ki_pos
;
165 const struct iovec
*iov
,
166 unsigned long nr_segs
,
169 return __xfs_file_readv(file
, iov
, 0, nr_segs
, ppos
);
173 xfs_file_readv_invis(
175 const struct iovec
*iov
,
176 unsigned long nr_segs
,
179 return __xfs_file_readv(file
, iov
, IO_INVIS
, nr_segs
, ppos
);
183 STATIC
inline ssize_t
186 const struct iovec
*iov
,
188 unsigned long nr_segs
,
191 struct inode
*inode
= file
->f_mapping
->host
;
192 vnode_t
*vp
= vn_from_inode(inode
);
196 init_sync_kiocb(&kiocb
, file
);
197 kiocb
.ki_pos
= *ppos
;
198 if (unlikely(file
->f_flags
& O_DIRECT
))
199 ioflags
|= IO_ISDIRECT
;
201 VOP_WRITE(vp
, &kiocb
, iov
, nr_segs
, &kiocb
.ki_pos
, ioflags
, NULL
, rval
);
203 *ppos
= kiocb
.ki_pos
;
211 const struct iovec
*iov
,
212 unsigned long nr_segs
,
215 return __xfs_file_writev(file
, iov
, 0, nr_segs
, ppos
);
219 xfs_file_writev_invis(
221 const struct iovec
*iov
,
222 unsigned long nr_segs
,
225 return __xfs_file_writev(file
, iov
, IO_INVIS
, nr_segs
, ppos
);
236 vnode_t
*vp
= vn_from_inode(filp
->f_dentry
->d_inode
);
239 VOP_SENDFILE(vp
, filp
, ppos
, 0, count
, actor
, target
, NULL
, rval
);
249 vnode_t
*vp
= vn_from_inode(inode
);
252 if (!(filp
->f_flags
& O_LARGEFILE
) && i_size_read(inode
) > MAX_NON_LFS
)
256 VOP_OPEN(vp
, NULL
, error
);
266 vnode_t
*vp
= vn_from_inode(inode
);
270 VOP_RELEASE(vp
, error
);
278 struct dentry
*dentry
,
281 struct inode
*inode
= dentry
->d_inode
;
282 vnode_t
*vp
= vn_from_inode(inode
);
284 int flags
= FSYNC_WAIT
;
290 VOP_FSYNC(vp
, flags
, NULL
, (xfs_off_t
)0, (xfs_off_t
)-1, error
);
295 * xfs_file_readdir maps to VOP_READDIR().
296 * We need to build a uio, cred, ...
299 #define nextdp(dp) ((struct xfs_dirent *)((char *)(dp) + (dp)->d_reclen))
301 #ifdef CONFIG_XFS_DMAPI
305 struct vm_area_struct
*area
,
306 unsigned long address
,
309 struct inode
*inode
= area
->vm_file
->f_dentry
->d_inode
;
310 vnode_t
*vp
= vn_from_inode(inode
);
311 xfs_mount_t
*mp
= XFS_VFSTOM(vp
->v_vfsp
);
314 ASSERT_ALWAYS(vp
->v_vfsp
->vfs_flag
& VFS_DMI
);
316 error
= XFS_SEND_MMAP(mp
, area
, 0);
320 return filemap_nopage(area
, address
, type
);
323 #endif /* CONFIG_XFS_DMAPI */
338 int namelen
, size
= 0;
339 size_t rlen
= PAGE_CACHE_SIZE
;
340 xfs_off_t start_offset
, curr_offset
;
341 xfs_dirent_t
*dbp
= NULL
;
343 vp
= vn_from_inode(filp
->f_dentry
->d_inode
);
346 /* Try fairly hard to get memory */
348 if ((read_buf
= (caddr_t
)kmalloc(rlen
, GFP_KERNEL
)))
351 } while (rlen
>= 1024);
353 if (read_buf
== NULL
)
357 uio
.uio_segflg
= UIO_SYSSPACE
;
358 curr_offset
= filp
->f_pos
;
359 if (filp
->f_pos
!= 0x7fffffff)
360 uio
.uio_offset
= filp
->f_pos
;
362 uio
.uio_offset
= 0xffffffff;
365 uio
.uio_resid
= iov
.iov_len
= rlen
;
366 iov
.iov_base
= read_buf
;
369 start_offset
= uio
.uio_offset
;
371 VOP_READDIR(vp
, &uio
, NULL
, &eof
, error
);
372 if ((uio
.uio_offset
== start_offset
) || error
) {
377 size
= rlen
- uio
.uio_resid
;
378 dbp
= (xfs_dirent_t
*)read_buf
;
380 namelen
= strlen(dbp
->d_name
);
382 if (filldir(dirent
, dbp
->d_name
, namelen
,
383 (loff_t
) curr_offset
& 0x7fffffff,
388 size
-= dbp
->d_reclen
;
389 curr_offset
= (loff_t
)dbp
->d_off
/* & 0x7fffffff */;
396 filp
->f_pos
= uio
.uio_offset
& 0x7fffffff;
398 filp
->f_pos
= curr_offset
;
409 struct vm_area_struct
*vma
)
411 struct inode
*ip
= filp
->f_dentry
->d_inode
;
412 vnode_t
*vp
= vn_from_inode(ip
);
416 vma
->vm_ops
= &xfs_file_vm_ops
;
418 #ifdef CONFIG_XFS_DMAPI
419 if (vp
->v_vfsp
->vfs_flag
& VFS_DMI
) {
420 vma
->vm_ops
= &xfs_dmapi_file_vm_ops
;
422 #endif /* CONFIG_XFS_DMAPI */
424 vattr
.va_mask
= XFS_AT_UPDATIME
;
425 VOP_SETATTR(vp
, &vattr
, XFS_AT_UPDATIME
, NULL
, error
);
427 __vn_revalidate(vp
, &vattr
); /* update flags */
439 struct inode
*inode
= filp
->f_dentry
->d_inode
;
440 vnode_t
*vp
= vn_from_inode(inode
);
442 VOP_IOCTL(vp
, inode
, filp
, 0, cmd
, (void __user
*)arg
, error
);
445 /* NOTE: some of the ioctl's return positive #'s as a
446 * byte count indicating success, such as
447 * readlink_by_handle. So we don't "sign flip"
448 * like most other routines. This means true
449 * errors need to be returned as a negative value.
455 xfs_file_ioctl_invis(
461 struct inode
*inode
= filp
->f_dentry
->d_inode
;
462 vnode_t
*vp
= vn_from_inode(inode
);
465 VOP_IOCTL(vp
, inode
, filp
, IO_INVIS
, cmd
, (void __user
*)arg
, error
);
468 /* NOTE: some of the ioctl's return positive #'s as a
469 * byte count indicating success, such as
470 * readlink_by_handle. So we don't "sign flip"
471 * like most other routines. This means true
472 * errors need to be returned as a negative value.
477 #ifdef CONFIG_XFS_DMAPI
478 #ifdef HAVE_VMOP_MPROTECT
481 struct vm_area_struct
*vma
,
482 unsigned int newflags
)
484 vnode_t
*vp
= vn_from_inode(vma
->vm_file
->f_dentry
->d_inode
);
487 if (vp
->v_vfsp
->vfs_flag
& VFS_DMI
) {
488 if ((vma
->vm_flags
& VM_MAYSHARE
) &&
489 (newflags
& VM_WRITE
) && !(vma
->vm_flags
& VM_WRITE
)) {
490 xfs_mount_t
*mp
= XFS_VFSTOM(vp
->v_vfsp
);
492 error
= XFS_SEND_MMAP(mp
, vma
, VM_WRITE
);
497 #endif /* HAVE_VMOP_MPROTECT */
498 #endif /* CONFIG_XFS_DMAPI */
500 #ifdef HAVE_FOP_OPEN_EXEC
501 /* If the user is attempting to execute a file that is offline then
502 * we have to trigger a DMAPI READ event before the file is marked as busy
503 * otherwise the invisible I/O will not be able to write to the file to bring
510 vnode_t
*vp
= vn_from_inode(inode
);
511 xfs_mount_t
*mp
= XFS_VFSTOM(vp
->v_vfsp
);
515 if (vp
->v_vfsp
->vfs_flag
& VFS_DMI
) {
521 if (DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_READ
)) {
522 error
= -XFS_SEND_DATA(mp
, DM_EVENT_READ
, vp
,
529 #endif /* HAVE_FOP_OPEN_EXEC */
531 const struct file_operations xfs_file_operations
= {
532 .llseek
= generic_file_llseek
,
533 .read
= do_sync_read
,
534 .write
= do_sync_write
,
535 .readv
= xfs_file_readv
,
536 .writev
= xfs_file_writev
,
537 .aio_read
= xfs_file_aio_read
,
538 .aio_write
= xfs_file_aio_write
,
539 .sendfile
= xfs_file_sendfile
,
540 .unlocked_ioctl
= xfs_file_ioctl
,
542 .compat_ioctl
= xfs_file_compat_ioctl
,
544 .mmap
= xfs_file_mmap
,
545 .open
= xfs_file_open
,
546 .release
= xfs_file_release
,
547 .fsync
= xfs_file_fsync
,
548 #ifdef HAVE_FOP_OPEN_EXEC
549 .open_exec
= xfs_file_open_exec
,
553 const struct file_operations xfs_invis_file_operations
= {
554 .llseek
= generic_file_llseek
,
555 .read
= do_sync_read
,
556 .write
= do_sync_write
,
557 .readv
= xfs_file_readv_invis
,
558 .writev
= xfs_file_writev_invis
,
559 .aio_read
= xfs_file_aio_read_invis
,
560 .aio_write
= xfs_file_aio_write_invis
,
561 .sendfile
= xfs_file_sendfile
,
562 .unlocked_ioctl
= xfs_file_ioctl_invis
,
564 .compat_ioctl
= xfs_file_compat_invis_ioctl
,
566 .mmap
= xfs_file_mmap
,
567 .open
= xfs_file_open
,
568 .release
= xfs_file_release
,
569 .fsync
= xfs_file_fsync
,
573 const struct file_operations xfs_dir_file_operations
= {
574 .read
= generic_read_dir
,
575 .readdir
= xfs_file_readdir
,
576 .unlocked_ioctl
= xfs_file_ioctl
,
578 .compat_ioctl
= xfs_file_compat_ioctl
,
580 .fsync
= xfs_file_fsync
,
583 static struct vm_operations_struct xfs_file_vm_ops
= {
584 .nopage
= filemap_nopage
,
585 .populate
= filemap_populate
,
588 #ifdef CONFIG_XFS_DMAPI
589 static struct vm_operations_struct xfs_dmapi_file_vm_ops
= {
590 .nopage
= xfs_vm_nopage
,
591 .populate
= filemap_populate
,
592 #ifdef HAVE_VMOP_MPROTECT
593 .mprotect
= xfs_vm_mprotect
,
596 #endif /* CONFIG_XFS_DMAPI */