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
25 #include "xfs_trans.h"
26 #include "xfs_dmapi.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_alloc_btree.h"
30 #include "xfs_ialloc_btree.h"
31 #include "xfs_alloc.h"
32 #include "xfs_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_error.h"
39 #include "xfs_ioctl32.h"
41 #include <linux/dcache.h>
42 #include <linux/smp_lock.h>
44 static struct vm_operations_struct xfs_file_vm_ops
;
45 #ifdef CONFIG_XFS_DMAPI
46 static struct vm_operations_struct xfs_dmapi_file_vm_ops
;
52 const struct iovec
*iov
,
53 unsigned long nr_segs
,
57 struct file
*file
= iocb
->ki_filp
;
58 bhv_vnode_t
*vp
= vn_from_inode(file
->f_path
.dentry
->d_inode
);
60 BUG_ON(iocb
->ki_pos
!= pos
);
61 if (unlikely(file
->f_flags
& O_DIRECT
))
62 ioflags
|= IO_ISDIRECT
;
63 return bhv_vop_read(vp
, iocb
, iov
, nr_segs
, &iocb
->ki_pos
,
70 const struct iovec
*iov
,
71 unsigned long nr_segs
,
74 return __xfs_file_read(iocb
, iov
, nr_segs
, IO_ISAIO
, pos
);
78 xfs_file_aio_read_invis(
80 const struct iovec
*iov
,
81 unsigned long nr_segs
,
84 return __xfs_file_read(iocb
, iov
, nr_segs
, IO_ISAIO
|IO_INVIS
, pos
);
90 const struct iovec
*iov
,
91 unsigned long nr_segs
,
95 struct file
*file
= iocb
->ki_filp
;
96 struct inode
*inode
= file
->f_mapping
->host
;
97 bhv_vnode_t
*vp
= vn_from_inode(inode
);
99 BUG_ON(iocb
->ki_pos
!= pos
);
100 if (unlikely(file
->f_flags
& O_DIRECT
))
101 ioflags
|= IO_ISDIRECT
;
102 return bhv_vop_write(vp
, iocb
, iov
, nr_segs
, &iocb
->ki_pos
,
109 const struct iovec
*iov
,
110 unsigned long nr_segs
,
113 return __xfs_file_write(iocb
, iov
, nr_segs
, IO_ISAIO
, pos
);
117 xfs_file_aio_write_invis(
119 const struct iovec
*iov
,
120 unsigned long nr_segs
,
123 return __xfs_file_write(iocb
, iov
, nr_segs
, IO_ISAIO
|IO_INVIS
, pos
);
127 xfs_file_splice_read(
130 struct pipe_inode_info
*pipe
,
134 return bhv_vop_splice_read(vn_from_inode(infilp
->f_path
.dentry
->d_inode
),
135 infilp
, ppos
, pipe
, len
, flags
, 0, NULL
);
139 xfs_file_splice_read_invis(
142 struct pipe_inode_info
*pipe
,
146 return bhv_vop_splice_read(vn_from_inode(infilp
->f_path
.dentry
->d_inode
),
147 infilp
, ppos
, pipe
, len
, flags
, IO_INVIS
,
152 xfs_file_splice_write(
153 struct pipe_inode_info
*pipe
,
154 struct file
*outfilp
,
159 return bhv_vop_splice_write(vn_from_inode(outfilp
->f_path
.dentry
->d_inode
),
160 pipe
, outfilp
, ppos
, len
, flags
, 0, NULL
);
164 xfs_file_splice_write_invis(
165 struct pipe_inode_info
*pipe
,
166 struct file
*outfilp
,
171 return bhv_vop_splice_write(vn_from_inode(outfilp
->f_path
.dentry
->d_inode
),
172 pipe
, outfilp
, ppos
, len
, flags
, IO_INVIS
,
181 if (!(filp
->f_flags
& O_LARGEFILE
) && i_size_read(inode
) > MAX_NON_LFS
)
183 return -bhv_vop_open(vn_from_inode(inode
), NULL
);
191 bhv_vnode_t
*vp
= vn_from_inode(inode
);
194 return -bhv_vop_release(vp
);
201 struct dentry
*dentry
,
204 bhv_vnode_t
*vp
= vn_from_inode(dentry
->d_inode
);
205 int flags
= FSYNC_WAIT
;
211 return -bhv_vop_fsync(vp
, flags
, NULL
, (xfs_off_t
)0, (xfs_off_t
)-1);
214 #ifdef CONFIG_XFS_DMAPI
217 struct vm_area_struct
*vma
,
218 struct vm_fault
*vmf
)
220 struct inode
*inode
= vma
->vm_file
->f_path
.dentry
->d_inode
;
221 bhv_vnode_t
*vp
= vn_from_inode(inode
);
223 ASSERT_ALWAYS(vp
->v_vfsp
->vfs_flag
& VFS_DMI
);
224 if (XFS_SEND_MMAP(XFS_VFSTOM(vp
->v_vfsp
), vma
, 0))
225 return VM_FAULT_SIGBUS
;
226 return filemap_fault(vma
, vmf
);
228 #endif /* CONFIG_XFS_DMAPI */
237 bhv_vnode_t
*vp
= vn_from_inode(filp
->f_path
.dentry
->d_inode
);
242 int namelen
, size
= 0;
243 size_t rlen
= PAGE_CACHE_SIZE
;
244 xfs_off_t start_offset
, curr_offset
;
245 xfs_dirent_t
*dbp
= NULL
;
247 /* Try fairly hard to get memory */
249 if ((read_buf
= kmalloc(rlen
, GFP_KERNEL
)))
252 } while (rlen
>= 1024);
254 if (read_buf
== NULL
)
258 uio
.uio_segflg
= UIO_SYSSPACE
;
259 curr_offset
= filp
->f_pos
;
260 if (filp
->f_pos
!= 0x7fffffff)
261 uio
.uio_offset
= filp
->f_pos
;
263 uio
.uio_offset
= 0xffffffff;
266 uio
.uio_resid
= iov
.iov_len
= rlen
;
267 iov
.iov_base
= read_buf
;
270 start_offset
= uio
.uio_offset
;
272 error
= bhv_vop_readdir(vp
, &uio
, NULL
, &eof
);
273 if ((uio
.uio_offset
== start_offset
) || error
) {
278 size
= rlen
- uio
.uio_resid
;
279 dbp
= (xfs_dirent_t
*)read_buf
;
281 namelen
= strlen(dbp
->d_name
);
283 if (filldir(dirent
, dbp
->d_name
, namelen
,
284 (loff_t
) curr_offset
& 0x7fffffff,
289 size
-= dbp
->d_reclen
;
290 curr_offset
= (loff_t
)dbp
->d_off
/* & 0x7fffffff */;
291 dbp
= (xfs_dirent_t
*)((char *)dbp
+ dbp
->d_reclen
);
297 filp
->f_pos
= uio
.uio_offset
& 0x7fffffff;
299 filp
->f_pos
= curr_offset
;
309 struct vm_area_struct
*vma
)
311 vma
->vm_ops
= &xfs_file_vm_ops
;
312 vma
->vm_flags
|= VM_CAN_NONLINEAR
;
314 #ifdef CONFIG_XFS_DMAPI
315 if (vn_from_inode(filp
->f_path
.dentry
->d_inode
)->v_vfsp
->vfs_flag
& VFS_DMI
)
316 vma
->vm_ops
= &xfs_dmapi_file_vm_ops
;
317 #endif /* CONFIG_XFS_DMAPI */
330 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
331 bhv_vnode_t
*vp
= vn_from_inode(inode
);
333 error
= bhv_vop_ioctl(vp
, inode
, filp
, 0, cmd
, (void __user
*)p
);
336 /* NOTE: some of the ioctl's return positive #'s as a
337 * byte count indicating success, such as
338 * readlink_by_handle. So we don't "sign flip"
339 * like most other routines. This means true
340 * errors need to be returned as a negative value.
346 xfs_file_ioctl_invis(
352 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
353 bhv_vnode_t
*vp
= vn_from_inode(inode
);
355 error
= bhv_vop_ioctl(vp
, inode
, filp
, IO_INVIS
, cmd
, (void __user
*)p
);
358 /* NOTE: some of the ioctl's return positive #'s as a
359 * byte count indicating success, such as
360 * readlink_by_handle. So we don't "sign flip"
361 * like most other routines. This means true
362 * errors need to be returned as a negative value.
367 #ifdef CONFIG_XFS_DMAPI
368 #ifdef HAVE_VMOP_MPROTECT
371 struct vm_area_struct
*vma
,
372 unsigned int newflags
)
374 bhv_vnode_t
*vp
= vn_from_inode(vma
->vm_file
->f_path
.dentry
->d_inode
);
377 if (vp
->v_vfsp
->vfs_flag
& VFS_DMI
) {
378 if ((vma
->vm_flags
& VM_MAYSHARE
) &&
379 (newflags
& VM_WRITE
) && !(vma
->vm_flags
& VM_WRITE
)) {
380 xfs_mount_t
*mp
= XFS_VFSTOM(vp
->v_vfsp
);
382 error
= XFS_SEND_MMAP(mp
, vma
, VM_WRITE
);
387 #endif /* HAVE_VMOP_MPROTECT */
388 #endif /* CONFIG_XFS_DMAPI */
390 #ifdef HAVE_FOP_OPEN_EXEC
391 /* If the user is attempting to execute a file that is offline then
392 * we have to trigger a DMAPI READ event before the file is marked as busy
393 * otherwise the invisible I/O will not be able to write to the file to bring
400 bhv_vnode_t
*vp
= vn_from_inode(inode
);
402 if (unlikely(vp
->v_vfsp
->vfs_flag
& VFS_DMI
)) {
403 xfs_mount_t
*mp
= XFS_VFSTOM(vp
->v_vfsp
);
404 xfs_inode_t
*ip
= xfs_vtoi(vp
);
408 if (DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_READ
))
409 return -XFS_SEND_DATA(mp
, DM_EVENT_READ
, vp
,
414 #endif /* HAVE_FOP_OPEN_EXEC */
416 const struct file_operations xfs_file_operations
= {
417 .llseek
= generic_file_llseek
,
418 .read
= do_sync_read
,
419 .write
= do_sync_write
,
420 .aio_read
= xfs_file_aio_read
,
421 .aio_write
= xfs_file_aio_write
,
422 .splice_read
= xfs_file_splice_read
,
423 .splice_write
= xfs_file_splice_write
,
424 .unlocked_ioctl
= xfs_file_ioctl
,
426 .compat_ioctl
= xfs_file_compat_ioctl
,
428 .mmap
= xfs_file_mmap
,
429 .open
= xfs_file_open
,
430 .release
= xfs_file_release
,
431 .fsync
= xfs_file_fsync
,
432 #ifdef HAVE_FOP_OPEN_EXEC
433 .open_exec
= xfs_file_open_exec
,
437 const struct file_operations xfs_invis_file_operations
= {
438 .llseek
= generic_file_llseek
,
439 .read
= do_sync_read
,
440 .write
= do_sync_write
,
441 .aio_read
= xfs_file_aio_read_invis
,
442 .aio_write
= xfs_file_aio_write_invis
,
443 .splice_read
= xfs_file_splice_read_invis
,
444 .splice_write
= xfs_file_splice_write_invis
,
445 .unlocked_ioctl
= xfs_file_ioctl_invis
,
447 .compat_ioctl
= xfs_file_compat_invis_ioctl
,
449 .mmap
= xfs_file_mmap
,
450 .open
= xfs_file_open
,
451 .release
= xfs_file_release
,
452 .fsync
= xfs_file_fsync
,
456 const struct file_operations xfs_dir_file_operations
= {
457 .read
= generic_read_dir
,
458 .readdir
= xfs_file_readdir
,
459 .unlocked_ioctl
= xfs_file_ioctl
,
461 .compat_ioctl
= xfs_file_compat_ioctl
,
463 .fsync
= xfs_file_fsync
,
466 static struct vm_operations_struct xfs_file_vm_ops
= {
467 .fault
= filemap_fault
,
470 #ifdef CONFIG_XFS_DMAPI
471 static struct vm_operations_struct xfs_dmapi_file_vm_ops
= {
472 .fault
= xfs_vm_fault
,
473 #ifdef HAVE_VMOP_MPROTECT
474 .mprotect
= xfs_vm_mprotect
,
477 #endif /* CONFIG_XFS_DMAPI */