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_vnodeops.h"
40 #include "xfs_da_btree.h"
41 #include "xfs_ioctl.h"
43 #include <linux/dcache.h>
45 static const struct vm_operations_struct xfs_file_vm_ops
;
50 const struct iovec
*iov
,
51 unsigned long nr_segs
,
54 struct file
*file
= iocb
->ki_filp
;
55 int ioflags
= IO_ISAIO
;
57 BUG_ON(iocb
->ki_pos
!= pos
);
58 if (unlikely(file
->f_flags
& O_DIRECT
))
59 ioflags
|= IO_ISDIRECT
;
60 if (file
->f_mode
& FMODE_NOCMTIME
)
62 return xfs_read(XFS_I(file
->f_path
.dentry
->d_inode
), iocb
, iov
,
63 nr_segs
, &iocb
->ki_pos
, ioflags
);
69 const struct iovec
*iov
,
70 unsigned long nr_segs
,
73 struct file
*file
= iocb
->ki_filp
;
74 int ioflags
= IO_ISAIO
;
76 BUG_ON(iocb
->ki_pos
!= pos
);
77 if (unlikely(file
->f_flags
& O_DIRECT
))
78 ioflags
|= IO_ISDIRECT
;
79 if (file
->f_mode
& FMODE_NOCMTIME
)
81 return xfs_write(XFS_I(file
->f_mapping
->host
), iocb
, iov
, nr_segs
,
82 &iocb
->ki_pos
, ioflags
);
89 struct pipe_inode_info
*pipe
,
95 if (infilp
->f_mode
& FMODE_NOCMTIME
)
98 return xfs_splice_read(XFS_I(infilp
->f_path
.dentry
->d_inode
),
99 infilp
, ppos
, pipe
, len
, flags
, ioflags
);
103 xfs_file_splice_write(
104 struct pipe_inode_info
*pipe
,
105 struct file
*outfilp
,
112 if (outfilp
->f_mode
& FMODE_NOCMTIME
)
115 return xfs_splice_write(XFS_I(outfilp
->f_path
.dentry
->d_inode
),
116 pipe
, outfilp
, ppos
, len
, flags
, ioflags
);
124 if (!(file
->f_flags
& O_LARGEFILE
) && i_size_read(inode
) > MAX_NON_LFS
)
126 if (XFS_FORCED_SHUTDOWN(XFS_M(inode
->i_sb
)))
136 struct xfs_inode
*ip
= XFS_I(inode
);
140 error
= xfs_file_open(inode
, file
);
145 * If there are any blocks, read-ahead block 0 as we're almost
146 * certain to have the next operation be a read there.
148 mode
= xfs_ilock_map_shared(ip
);
149 if (ip
->i_d
.di_nextents
> 0)
150 xfs_da_reada_buf(NULL
, ip
, 0, XFS_DATA_FORK
);
151 xfs_iunlock(ip
, mode
);
160 return -xfs_release(XFS_I(inode
));
164 * We ignore the datasync flag here because a datasync is effectively
165 * identical to an fsync. That is, datasync implies that we need to write
166 * only the metadata needed to be able to access the data that is written
167 * if we crash after the call completes. Hence if we are writing beyond
168 * EOF we have to log the inode size change as well, which makes it a
169 * full fsync. If we don't write beyond EOF, the inode core will be
170 * clean in memory and so we don't need to log the inode, just like
176 struct dentry
*dentry
,
179 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
181 xfs_iflags_clear(ip
, XFS_ITRUNCATED
);
182 return -xfs_fsync(ip
);
191 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
192 xfs_inode_t
*ip
= XFS_I(inode
);
197 * The Linux API doesn't pass down the total size of the buffer
198 * we read into down to the filesystem. With the filldir concept
199 * it's not needed for correct information, but the XFS dir2 leaf
200 * code wants an estimate of the buffer size to calculate it's
201 * readahead window and size the buffers used for mapping to
204 * Try to give it an estimate that's good enough, maybe at some
205 * point we can change the ->readdir prototype to include the
208 bufsize
= (size_t)min_t(loff_t
, PAGE_SIZE
, ip
->i_d
.di_size
);
210 error
= xfs_readdir(ip
, dirent
, bufsize
,
211 (xfs_off_t
*)&filp
->f_pos
, filldir
);
220 struct vm_area_struct
*vma
)
222 vma
->vm_ops
= &xfs_file_vm_ops
;
223 vma
->vm_flags
|= VM_CAN_NONLINEAR
;
230 * mmap()d file has taken write protection fault and is being made
231 * writable. We can set the page state up correctly for a writable
232 * page, which means we can do correct delalloc accounting (ENOSPC
233 * checking!) and unwritten extent mapping.
237 struct vm_area_struct
*vma
,
238 struct vm_fault
*vmf
)
240 return block_page_mkwrite(vma
, vmf
, xfs_get_blocks
);
243 const struct file_operations xfs_file_operations
= {
244 .llseek
= generic_file_llseek
,
245 .read
= do_sync_read
,
246 .write
= do_sync_write
,
247 .aio_read
= xfs_file_aio_read
,
248 .aio_write
= xfs_file_aio_write
,
249 .splice_read
= xfs_file_splice_read
,
250 .splice_write
= xfs_file_splice_write
,
251 .unlocked_ioctl
= xfs_file_ioctl
,
253 .compat_ioctl
= xfs_file_compat_ioctl
,
255 .mmap
= xfs_file_mmap
,
256 .open
= xfs_file_open
,
257 .release
= xfs_file_release
,
258 .fsync
= xfs_file_fsync
,
259 #ifdef HAVE_FOP_OPEN_EXEC
260 .open_exec
= xfs_file_open_exec
,
264 const struct file_operations xfs_dir_file_operations
= {
265 .open
= xfs_dir_open
,
266 .read
= generic_read_dir
,
267 .readdir
= xfs_file_readdir
,
268 .llseek
= generic_file_llseek
,
269 .unlocked_ioctl
= xfs_file_ioctl
,
271 .compat_ioctl
= xfs_file_compat_ioctl
,
273 .fsync
= xfs_file_fsync
,
276 static const struct vm_operations_struct xfs_file_vm_ops
= {
277 .fault
= filemap_fault
,
278 .page_mkwrite
= xfs_vm_page_mkwrite
,