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"
40 #include "xfs_vnodeops.h"
42 #include <linux/dcache.h>
43 #include <linux/smp_lock.h>
45 static struct vm_operations_struct xfs_file_vm_ops
;
46 #ifdef CONFIG_XFS_DMAPI
47 static struct vm_operations_struct xfs_dmapi_file_vm_ops
;
53 const struct iovec
*iov
,
54 unsigned long nr_segs
,
58 struct file
*file
= iocb
->ki_filp
;
60 BUG_ON(iocb
->ki_pos
!= pos
);
61 if (unlikely(file
->f_flags
& O_DIRECT
))
62 ioflags
|= IO_ISDIRECT
;
63 return xfs_read(XFS_I(file
->f_path
.dentry
->d_inode
), iocb
, iov
,
64 nr_segs
, &iocb
->ki_pos
, ioflags
);
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
;
97 BUG_ON(iocb
->ki_pos
!= pos
);
98 if (unlikely(file
->f_flags
& O_DIRECT
))
99 ioflags
|= IO_ISDIRECT
;
100 return xfs_write(XFS_I(file
->f_mapping
->host
), iocb
, iov
, nr_segs
,
101 &iocb
->ki_pos
, ioflags
);
107 const struct iovec
*iov
,
108 unsigned long nr_segs
,
111 return __xfs_file_write(iocb
, iov
, nr_segs
, IO_ISAIO
, pos
);
115 xfs_file_aio_write_invis(
117 const struct iovec
*iov
,
118 unsigned long nr_segs
,
121 return __xfs_file_write(iocb
, iov
, nr_segs
, IO_ISAIO
|IO_INVIS
, pos
);
125 xfs_file_splice_read(
128 struct pipe_inode_info
*pipe
,
132 return xfs_splice_read(XFS_I(infilp
->f_path
.dentry
->d_inode
),
133 infilp
, ppos
, pipe
, len
, flags
, 0);
137 xfs_file_splice_read_invis(
140 struct pipe_inode_info
*pipe
,
144 return xfs_splice_read(XFS_I(infilp
->f_path
.dentry
->d_inode
),
145 infilp
, ppos
, pipe
, len
, flags
, IO_INVIS
);
149 xfs_file_splice_write(
150 struct pipe_inode_info
*pipe
,
151 struct file
*outfilp
,
156 return xfs_splice_write(XFS_I(outfilp
->f_path
.dentry
->d_inode
),
157 pipe
, outfilp
, ppos
, len
, flags
, 0);
161 xfs_file_splice_write_invis(
162 struct pipe_inode_info
*pipe
,
163 struct file
*outfilp
,
168 return xfs_splice_write(XFS_I(outfilp
->f_path
.dentry
->d_inode
),
169 pipe
, outfilp
, ppos
, len
, flags
, IO_INVIS
);
177 if (!(filp
->f_flags
& O_LARGEFILE
) && i_size_read(inode
) > MAX_NON_LFS
)
179 return -xfs_open(XFS_I(inode
));
187 return -xfs_release(XFS_I(inode
));
193 struct dentry
*dentry
,
196 int flags
= FSYNC_WAIT
;
200 xfs_iflags_clear(XFS_I(dentry
->d_inode
), XFS_ITRUNCATED
);
201 return -xfs_fsync(XFS_I(dentry
->d_inode
), flags
,
202 (xfs_off_t
)0, (xfs_off_t
)-1);
205 #ifdef CONFIG_XFS_DMAPI
208 struct vm_area_struct
*vma
,
209 struct vm_fault
*vmf
)
211 struct inode
*inode
= vma
->vm_file
->f_path
.dentry
->d_inode
;
212 bhv_vnode_t
*vp
= vn_from_inode(inode
);
214 ASSERT_ALWAYS(vp
->v_vfsp
->vfs_flag
& VFS_DMI
);
215 if (XFS_SEND_MMAP(XFS_VFSTOM(vp
->v_vfsp
), vma
, 0))
216 return VM_FAULT_SIGBUS
;
217 return filemap_fault(vma
, vmf
);
219 #endif /* CONFIG_XFS_DMAPI */
227 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
228 xfs_inode_t
*ip
= XFS_I(inode
);
233 * The Linux API doesn't pass down the total size of the buffer
234 * we read into down to the filesystem. With the filldir concept
235 * it's not needed for correct information, but the XFS dir2 leaf
236 * code wants an estimate of the buffer size to calculate it's
237 * readahead window and size the buffers used for mapping to
240 * Try to give it an estimate that's good enough, maybe at some
241 * point we can change the ->readdir prototype to include the
244 bufsize
= (size_t)min_t(loff_t
, PAGE_SIZE
, inode
->i_size
);
246 error
= xfs_readdir(ip
, dirent
, bufsize
,
247 (xfs_off_t
*)&filp
->f_pos
, filldir
);
256 struct vm_area_struct
*vma
)
258 vma
->vm_ops
= &xfs_file_vm_ops
;
259 vma
->vm_flags
|= VM_CAN_NONLINEAR
;
261 #ifdef CONFIG_XFS_DMAPI
262 if (XFS_M(filp
->f_path
.dentry
->d_inode
->i_sb
)->m_flags
& XFS_MOUNT_DMAPI
)
263 vma
->vm_ops
= &xfs_dmapi_file_vm_ops
;
264 #endif /* CONFIG_XFS_DMAPI */
277 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
279 error
= xfs_ioctl(XFS_I(inode
), filp
, 0, cmd
, (void __user
*)p
);
280 xfs_iflags_set(XFS_I(inode
), XFS_IMODIFIED
);
282 /* NOTE: some of the ioctl's return positive #'s as a
283 * byte count indicating success, such as
284 * readlink_by_handle. So we don't "sign flip"
285 * like most other routines. This means true
286 * errors need to be returned as a negative value.
292 xfs_file_ioctl_invis(
298 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
300 error
= xfs_ioctl(XFS_I(inode
), filp
, IO_INVIS
, cmd
, (void __user
*)p
);
301 xfs_iflags_set(XFS_I(inode
), XFS_IMODIFIED
);
303 /* NOTE: some of the ioctl's return positive #'s as a
304 * byte count indicating success, such as
305 * readlink_by_handle. So we don't "sign flip"
306 * like most other routines. This means true
307 * errors need to be returned as a negative value.
312 #ifdef CONFIG_XFS_DMAPI
313 #ifdef HAVE_VMOP_MPROTECT
316 struct vm_area_struct
*vma
,
317 unsigned int newflags
)
319 struct inode
*inode
= vma
->vm_file
->f_path
.dentry
->d_inode
;
320 struct xfs_mount
*mp
= XFS_M(inode
->i_sb
);
323 if (mp
->m_flags
& XFS_MOUNT_DMAPI
) {
324 if ((vma
->vm_flags
& VM_MAYSHARE
) &&
325 (newflags
& VM_WRITE
) && !(vma
->vm_flags
& VM_WRITE
))
326 error
= XFS_SEND_MMAP(mp
, vma
, VM_WRITE
);
330 #endif /* HAVE_VMOP_MPROTECT */
331 #endif /* CONFIG_XFS_DMAPI */
333 #ifdef HAVE_FOP_OPEN_EXEC
334 /* If the user is attempting to execute a file that is offline then
335 * we have to trigger a DMAPI READ event before the file is marked as busy
336 * otherwise the invisible I/O will not be able to write to the file to bring
343 struct xfs_mount
*mp
= XFS_M(inode
->i_sb
);
345 if (unlikely(mp
->m_flags
& XFS_MOUNT_DMAPI
)) {
346 if (DM_EVENT_ENABLED(XFS_I(inode
), DM_EVENT_READ
)) {
347 bhv_vnode_t
*vp
= vn_from_inode(inode
);
349 return -XFS_SEND_DATA(mp
, DM_EVENT_READ
,
356 #endif /* HAVE_FOP_OPEN_EXEC */
359 * mmap()d file has taken write protection fault and is being made
360 * writable. We can set the page state up correctly for a writable
361 * page, which means we can do correct delalloc accounting (ENOSPC
362 * checking!) and unwritten extent mapping.
366 struct vm_area_struct
*vma
,
369 return block_page_mkwrite(vma
, page
, xfs_get_blocks
);
372 const struct file_operations xfs_file_operations
= {
373 .llseek
= generic_file_llseek
,
374 .read
= do_sync_read
,
375 .write
= do_sync_write
,
376 .aio_read
= xfs_file_aio_read
,
377 .aio_write
= xfs_file_aio_write
,
378 .splice_read
= xfs_file_splice_read
,
379 .splice_write
= xfs_file_splice_write
,
380 .unlocked_ioctl
= xfs_file_ioctl
,
382 .compat_ioctl
= xfs_file_compat_ioctl
,
384 .mmap
= xfs_file_mmap
,
385 .open
= xfs_file_open
,
386 .release
= xfs_file_release
,
387 .fsync
= xfs_file_fsync
,
388 #ifdef HAVE_FOP_OPEN_EXEC
389 .open_exec
= xfs_file_open_exec
,
393 const struct file_operations xfs_invis_file_operations
= {
394 .llseek
= generic_file_llseek
,
395 .read
= do_sync_read
,
396 .write
= do_sync_write
,
397 .aio_read
= xfs_file_aio_read_invis
,
398 .aio_write
= xfs_file_aio_write_invis
,
399 .splice_read
= xfs_file_splice_read_invis
,
400 .splice_write
= xfs_file_splice_write_invis
,
401 .unlocked_ioctl
= xfs_file_ioctl_invis
,
403 .compat_ioctl
= xfs_file_compat_invis_ioctl
,
405 .mmap
= xfs_file_mmap
,
406 .open
= xfs_file_open
,
407 .release
= xfs_file_release
,
408 .fsync
= xfs_file_fsync
,
412 const struct file_operations xfs_dir_file_operations
= {
413 .read
= generic_read_dir
,
414 .readdir
= xfs_file_readdir
,
415 .unlocked_ioctl
= xfs_file_ioctl
,
417 .compat_ioctl
= xfs_file_compat_ioctl
,
419 .fsync
= xfs_file_fsync
,
422 static struct vm_operations_struct xfs_file_vm_ops
= {
423 .fault
= filemap_fault
,
424 .page_mkwrite
= xfs_vm_page_mkwrite
,
427 #ifdef CONFIG_XFS_DMAPI
428 static struct vm_operations_struct xfs_dmapi_file_vm_ops
= {
429 .fault
= xfs_vm_fault
,
430 .page_mkwrite
= xfs_vm_page_mkwrite
,
431 #ifdef HAVE_VMOP_MPROTECT
432 .mprotect
= xfs_vm_mprotect
,
435 #endif /* CONFIG_XFS_DMAPI */