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 inode *inode = dentry->d_inode;
180 struct xfs_inode *ip = XFS_I(inode);
183 /* capture size updates in I/O completion before writing the inode. */
184 error = filemap_fdatawait(inode->i_mapping);
188 xfs_iflags_clear(ip, XFS_ITRUNCATED);
189 return -xfs_fsync(ip);
198 struct inode *inode = filp->f_path.dentry->d_inode;
199 xfs_inode_t *ip = XFS_I(inode);
204 * The Linux API doesn't pass down the total size of the buffer
205 * we read into down to the filesystem. With the filldir concept
206 * it's not needed for correct information, but the XFS dir2 leaf
207 * code wants an estimate of the buffer size to calculate it's
208 * readahead window and size the buffers used for mapping to
211 * Try to give it an estimate that's good enough, maybe at some
212 * point we can change the ->readdir prototype to include the
215 bufsize = (size_t)min_t(loff_t, PAGE_SIZE, ip->i_d.di_size);
217 error = xfs_readdir(ip, dirent, bufsize,
218 (xfs_off_t *)&filp->f_pos, filldir);
227 struct vm_area_struct *vma)
229 vma->vm_ops = &xfs_file_vm_ops;
230 vma->vm_flags |= VM_CAN_NONLINEAR;
237 * mmap()d file has taken write protection fault and is being made
238 * writable. We can set the page state up correctly for a writable
239 * page, which means we can do correct delalloc accounting (ENOSPC
240 * checking!) and unwritten extent mapping.
244 struct vm_area_struct *vma,
245 struct vm_fault *vmf)
247 return block_page_mkwrite(vma, vmf, xfs_get_blocks);
250 const struct file_operations xfs_file_operations = {
251 .llseek = generic_file_llseek,
252 .read = do_sync_read,
253 .write = do_sync_write,
254 .aio_read = xfs_file_aio_read,
255 .aio_write = xfs_file_aio_write,
256 .splice_read = xfs_file_splice_read,
257 .splice_write = xfs_file_splice_write,
258 .unlocked_ioctl = xfs_file_ioctl,
260 .compat_ioctl = xfs_file_compat_ioctl,
262 .mmap = xfs_file_mmap,
263 .open = xfs_file_open,
264 .release = xfs_file_release,
265 .fsync = xfs_file_fsync,
266 #ifdef HAVE_FOP_OPEN_EXEC
267 .open_exec = xfs_file_open_exec,
271 const struct file_operations xfs_dir_file_operations = {
272 .open = xfs_dir_open,
273 .read = generic_read_dir,
274 .readdir = xfs_file_readdir,
275 .llseek = generic_file_llseek,
276 .unlocked_ioctl = xfs_file_ioctl,
278 .compat_ioctl = xfs_file_compat_ioctl,
280 .fsync = xfs_file_fsync,
283 static const struct vm_operations_struct xfs_file_vm_ops = {
284 .fault = filemap_fault,
285 .page_mkwrite = xfs_vm_page_mkwrite,