Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_bit.h" |
1da177e4 | 20 | #include "xfs_log.h" |
a844f451 | 21 | #include "xfs_inum.h" |
1da177e4 | 22 | #include "xfs_sb.h" |
a844f451 | 23 | #include "xfs_ag.h" |
1da177e4 LT |
24 | #include "xfs_dir2.h" |
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" | |
1da177e4 LT |
34 | #include "xfs_dir2_sf.h" |
35 | #include "xfs_dinode.h" | |
36 | #include "xfs_inode.h" | |
37 | #include "xfs_error.h" | |
38 | #include "xfs_rw.h" | |
739bfb2a | 39 | #include "xfs_vnodeops.h" |
f999a5bf | 40 | #include "xfs_da_btree.h" |
ddcd856d | 41 | #include "xfs_ioctl.h" |
1da177e4 LT |
42 | |
43 | #include <linux/dcache.h> | |
1da177e4 | 44 | |
3562fd45 | 45 | static struct vm_operations_struct xfs_file_vm_ops; |
1da177e4 | 46 | |
4d4be482 CH |
47 | STATIC ssize_t |
48 | xfs_file_aio_read( | |
1da177e4 | 49 | struct kiocb *iocb, |
027445c3 BP |
50 | const struct iovec *iov, |
51 | unsigned long nr_segs, | |
1da177e4 LT |
52 | loff_t pos) |
53 | { | |
1da177e4 | 54 | struct file *file = iocb->ki_filp; |
4d4be482 | 55 | int ioflags = IO_ISAIO; |
1da177e4 LT |
56 | |
57 | BUG_ON(iocb->ki_pos != pos); | |
1da177e4 LT |
58 | if (unlikely(file->f_flags & O_DIRECT)) |
59 | ioflags |= IO_ISDIRECT; | |
4d4be482 CH |
60 | if (file->f_mode & FMODE_NOCMTIME) |
61 | ioflags |= IO_INVIS; | |
739bfb2a CH |
62 | return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov, |
63 | nr_segs, &iocb->ki_pos, ioflags); | |
1da177e4 LT |
64 | } |
65 | ||
1da177e4 | 66 | STATIC ssize_t |
4d4be482 | 67 | xfs_file_aio_write( |
027445c3 BP |
68 | struct kiocb *iocb, |
69 | const struct iovec *iov, | |
70 | unsigned long nr_segs, | |
027445c3 | 71 | loff_t pos) |
1da177e4 | 72 | { |
4d4be482 CH |
73 | struct file *file = iocb->ki_filp; |
74 | int ioflags = IO_ISAIO; | |
1da177e4 LT |
75 | |
76 | BUG_ON(iocb->ki_pos != pos); | |
77 | if (unlikely(file->f_flags & O_DIRECT)) | |
78 | ioflags |= IO_ISDIRECT; | |
4d4be482 CH |
79 | if (file->f_mode & FMODE_NOCMTIME) |
80 | ioflags |= IO_INVIS; | |
739bfb2a CH |
81 | return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs, |
82 | &iocb->ki_pos, ioflags); | |
1da177e4 LT |
83 | } |
84 | ||
1b895840 NS |
85 | STATIC ssize_t |
86 | xfs_file_splice_read( | |
87 | struct file *infilp, | |
cbb7e577 | 88 | loff_t *ppos, |
3a326a2c | 89 | struct pipe_inode_info *pipe, |
1b895840 NS |
90 | size_t len, |
91 | unsigned int flags) | |
92 | { | |
4d4be482 CH |
93 | int ioflags = 0; |
94 | ||
95 | if (infilp->f_mode & FMODE_NOCMTIME) | |
96 | ioflags |= IO_INVIS; | |
1b895840 | 97 | |
739bfb2a | 98 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
4d4be482 | 99 | infilp, ppos, pipe, len, flags, ioflags); |
1b895840 NS |
100 | } |
101 | ||
102 | STATIC ssize_t | |
103 | xfs_file_splice_write( | |
3a326a2c | 104 | struct pipe_inode_info *pipe, |
1b895840 | 105 | struct file *outfilp, |
cbb7e577 | 106 | loff_t *ppos, |
1b895840 NS |
107 | size_t len, |
108 | unsigned int flags) | |
109 | { | |
4d4be482 CH |
110 | int ioflags = 0; |
111 | ||
112 | if (outfilp->f_mode & FMODE_NOCMTIME) | |
113 | ioflags |= IO_INVIS; | |
1b895840 | 114 | |
739bfb2a | 115 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
4d4be482 | 116 | pipe, outfilp, ppos, len, flags, ioflags); |
1b895840 | 117 | } |
1da177e4 LT |
118 | |
119 | STATIC int | |
3562fd45 | 120 | xfs_file_open( |
1da177e4 | 121 | struct inode *inode, |
f999a5bf | 122 | struct file *file) |
1da177e4 | 123 | { |
f999a5bf | 124 | if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
1da177e4 | 125 | return -EFBIG; |
f999a5bf CH |
126 | if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb))) |
127 | return -EIO; | |
128 | return 0; | |
129 | } | |
130 | ||
131 | STATIC int | |
132 | xfs_dir_open( | |
133 | struct inode *inode, | |
134 | struct file *file) | |
135 | { | |
136 | struct xfs_inode *ip = XFS_I(inode); | |
137 | int mode; | |
138 | int error; | |
139 | ||
140 | error = xfs_file_open(inode, file); | |
141 | if (error) | |
142 | return error; | |
143 | ||
144 | /* | |
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. | |
147 | */ | |
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); | |
152 | return 0; | |
1da177e4 LT |
153 | } |
154 | ||
1da177e4 | 155 | STATIC int |
3562fd45 | 156 | xfs_file_release( |
1da177e4 LT |
157 | struct inode *inode, |
158 | struct file *filp) | |
159 | { | |
739bfb2a | 160 | return -xfs_release(XFS_I(inode)); |
1da177e4 LT |
161 | } |
162 | ||
978b7237 DC |
163 | /* |
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 | |
171 | * fsync. | |
172 | */ | |
1da177e4 | 173 | STATIC int |
3562fd45 | 174 | xfs_file_fsync( |
13e6d5cd CH |
175 | struct file *file, |
176 | struct dentry *dentry, | |
177 | int datasync) | |
1da177e4 | 178 | { |
13e6d5cd CH |
179 | struct inode *inode = dentry->d_inode; |
180 | struct xfs_inode *ip = XFS_I(inode); | |
181 | int error; | |
182 | ||
183 | /* capture size updates in I/O completion before writing the inode. */ | |
184 | error = filemap_fdatawait(inode->i_mapping); | |
185 | if (error) | |
186 | return error; | |
187 | ||
188 | xfs_iflags_clear(ip, XFS_ITRUNCATED); | |
189 | return -xfs_fsync(ip); | |
1da177e4 LT |
190 | } |
191 | ||
1da177e4 | 192 | STATIC int |
3562fd45 | 193 | xfs_file_readdir( |
1da177e4 LT |
194 | struct file *filp, |
195 | void *dirent, | |
196 | filldir_t filldir) | |
197 | { | |
051e7cd4 | 198 | struct inode *inode = filp->f_path.dentry->d_inode; |
739bfb2a | 199 | xfs_inode_t *ip = XFS_I(inode); |
051e7cd4 CH |
200 | int error; |
201 | size_t bufsize; | |
202 | ||
203 | /* | |
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 | |
209 | * physical blocks. | |
210 | * | |
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 | |
213 | * buffer size. | |
214 | */ | |
d415867e | 215 | bufsize = (size_t)min_t(loff_t, PAGE_SIZE, ip->i_d.di_size); |
051e7cd4 | 216 | |
739bfb2a | 217 | error = xfs_readdir(ip, dirent, bufsize, |
051e7cd4 CH |
218 | (xfs_off_t *)&filp->f_pos, filldir); |
219 | if (error) | |
220 | return -error; | |
221 | return 0; | |
1da177e4 LT |
222 | } |
223 | ||
1da177e4 | 224 | STATIC int |
3562fd45 | 225 | xfs_file_mmap( |
1da177e4 LT |
226 | struct file *filp, |
227 | struct vm_area_struct *vma) | |
228 | { | |
3562fd45 | 229 | vma->vm_ops = &xfs_file_vm_ops; |
d0217ac0 | 230 | vma->vm_flags |= VM_CAN_NONLINEAR; |
6fac0cb4 | 231 | |
fbc1462b | 232 | file_accessed(filp); |
1da177e4 LT |
233 | return 0; |
234 | } | |
235 | ||
4f57dbc6 DC |
236 | /* |
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. | |
241 | */ | |
242 | STATIC int | |
243 | xfs_vm_page_mkwrite( | |
244 | struct vm_area_struct *vma, | |
c2ec175c | 245 | struct vm_fault *vmf) |
4f57dbc6 | 246 | { |
c2ec175c | 247 | return block_page_mkwrite(vma, vmf, xfs_get_blocks); |
4f57dbc6 DC |
248 | } |
249 | ||
4b6f5d20 | 250 | const struct file_operations xfs_file_operations = { |
1da177e4 LT |
251 | .llseek = generic_file_llseek, |
252 | .read = do_sync_read, | |
bb3f724e | 253 | .write = do_sync_write, |
3562fd45 NS |
254 | .aio_read = xfs_file_aio_read, |
255 | .aio_write = xfs_file_aio_write, | |
1b895840 NS |
256 | .splice_read = xfs_file_splice_read, |
257 | .splice_write = xfs_file_splice_write, | |
3562fd45 | 258 | .unlocked_ioctl = xfs_file_ioctl, |
1da177e4 | 259 | #ifdef CONFIG_COMPAT |
3562fd45 | 260 | .compat_ioctl = xfs_file_compat_ioctl, |
1da177e4 | 261 | #endif |
3562fd45 NS |
262 | .mmap = xfs_file_mmap, |
263 | .open = xfs_file_open, | |
264 | .release = xfs_file_release, | |
265 | .fsync = xfs_file_fsync, | |
1da177e4 | 266 | #ifdef HAVE_FOP_OPEN_EXEC |
3562fd45 | 267 | .open_exec = xfs_file_open_exec, |
1da177e4 LT |
268 | #endif |
269 | }; | |
270 | ||
4b6f5d20 | 271 | const struct file_operations xfs_dir_file_operations = { |
f999a5bf | 272 | .open = xfs_dir_open, |
1da177e4 | 273 | .read = generic_read_dir, |
3562fd45 | 274 | .readdir = xfs_file_readdir, |
59af1584 | 275 | .llseek = generic_file_llseek, |
3562fd45 | 276 | .unlocked_ioctl = xfs_file_ioctl, |
d3870398 | 277 | #ifdef CONFIG_COMPAT |
3562fd45 | 278 | .compat_ioctl = xfs_file_compat_ioctl, |
d3870398 | 279 | #endif |
3562fd45 | 280 | .fsync = xfs_file_fsync, |
1da177e4 LT |
281 | }; |
282 | ||
3562fd45 | 283 | static struct vm_operations_struct xfs_file_vm_ops = { |
54cb8821 | 284 | .fault = filemap_fault, |
4f57dbc6 | 285 | .page_mkwrite = xfs_vm_page_mkwrite, |
6fac0cb4 | 286 | }; |