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" | |
39 | #include "xfs_ioctl32.h" | |
739bfb2a | 40 | #include "xfs_vnodeops.h" |
f999a5bf | 41 | #include "xfs_da_btree.h" |
1da177e4 LT |
42 | |
43 | #include <linux/dcache.h> | |
44 | #include <linux/smp_lock.h> | |
45 | ||
3562fd45 | 46 | static struct vm_operations_struct xfs_file_vm_ops; |
1da177e4 | 47 | |
7989cb8e | 48 | STATIC_INLINE ssize_t |
3562fd45 | 49 | __xfs_file_read( |
1da177e4 | 50 | struct kiocb *iocb, |
027445c3 BP |
51 | const struct iovec *iov, |
52 | unsigned long nr_segs, | |
1da177e4 | 53 | int ioflags, |
1da177e4 LT |
54 | loff_t pos) |
55 | { | |
1da177e4 | 56 | struct file *file = iocb->ki_filp; |
1da177e4 LT |
57 | |
58 | BUG_ON(iocb->ki_pos != pos); | |
1da177e4 LT |
59 | if (unlikely(file->f_flags & O_DIRECT)) |
60 | ioflags |= IO_ISDIRECT; | |
739bfb2a CH |
61 | return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov, |
62 | nr_segs, &iocb->ki_pos, ioflags); | |
1da177e4 LT |
63 | } |
64 | ||
1da177e4 | 65 | STATIC ssize_t |
3562fd45 | 66 | xfs_file_aio_read( |
1da177e4 | 67 | struct kiocb *iocb, |
027445c3 BP |
68 | const struct iovec *iov, |
69 | unsigned long nr_segs, | |
1da177e4 LT |
70 | loff_t pos) |
71 | { | |
027445c3 | 72 | return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos); |
1da177e4 LT |
73 | } |
74 | ||
75 | STATIC ssize_t | |
3562fd45 | 76 | xfs_file_aio_read_invis( |
1da177e4 | 77 | struct kiocb *iocb, |
027445c3 BP |
78 | const struct iovec *iov, |
79 | unsigned long nr_segs, | |
1da177e4 LT |
80 | loff_t pos) |
81 | { | |
027445c3 | 82 | return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); |
1da177e4 LT |
83 | } |
84 | ||
7989cb8e | 85 | STATIC_INLINE ssize_t |
3562fd45 | 86 | __xfs_file_write( |
027445c3 BP |
87 | struct kiocb *iocb, |
88 | const struct iovec *iov, | |
89 | unsigned long nr_segs, | |
90 | int ioflags, | |
91 | loff_t pos) | |
1da177e4 | 92 | { |
1da177e4 | 93 | struct file *file = iocb->ki_filp; |
1da177e4 LT |
94 | |
95 | BUG_ON(iocb->ki_pos != pos); | |
96 | if (unlikely(file->f_flags & O_DIRECT)) | |
97 | ioflags |= IO_ISDIRECT; | |
739bfb2a CH |
98 | return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs, |
99 | &iocb->ki_pos, ioflags); | |
1da177e4 LT |
100 | } |
101 | ||
1da177e4 | 102 | STATIC ssize_t |
3562fd45 | 103 | xfs_file_aio_write( |
1da177e4 | 104 | struct kiocb *iocb, |
027445c3 BP |
105 | const struct iovec *iov, |
106 | unsigned long nr_segs, | |
1da177e4 LT |
107 | loff_t pos) |
108 | { | |
027445c3 | 109 | return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos); |
1da177e4 LT |
110 | } |
111 | ||
112 | STATIC ssize_t | |
3562fd45 | 113 | xfs_file_aio_write_invis( |
1da177e4 | 114 | struct kiocb *iocb, |
027445c3 BP |
115 | const struct iovec *iov, |
116 | unsigned long nr_segs, | |
1da177e4 LT |
117 | loff_t pos) |
118 | { | |
027445c3 | 119 | return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); |
1da177e4 LT |
120 | } |
121 | ||
1b895840 NS |
122 | STATIC ssize_t |
123 | xfs_file_splice_read( | |
124 | struct file *infilp, | |
cbb7e577 | 125 | loff_t *ppos, |
3a326a2c | 126 | struct pipe_inode_info *pipe, |
1b895840 NS |
127 | size_t len, |
128 | unsigned int flags) | |
129 | { | |
739bfb2a CH |
130 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
131 | infilp, ppos, pipe, len, flags, 0); | |
1b895840 NS |
132 | } |
133 | ||
134 | STATIC ssize_t | |
135 | xfs_file_splice_read_invis( | |
136 | struct file *infilp, | |
cbb7e577 | 137 | loff_t *ppos, |
3a326a2c | 138 | struct pipe_inode_info *pipe, |
1b895840 NS |
139 | size_t len, |
140 | unsigned int flags) | |
141 | { | |
739bfb2a CH |
142 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
143 | infilp, ppos, pipe, len, flags, IO_INVIS); | |
1b895840 NS |
144 | } |
145 | ||
146 | STATIC ssize_t | |
147 | xfs_file_splice_write( | |
3a326a2c | 148 | struct pipe_inode_info *pipe, |
1b895840 | 149 | struct file *outfilp, |
cbb7e577 | 150 | loff_t *ppos, |
1b895840 NS |
151 | size_t len, |
152 | unsigned int flags) | |
153 | { | |
739bfb2a CH |
154 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
155 | pipe, outfilp, ppos, len, flags, 0); | |
1b895840 NS |
156 | } |
157 | ||
158 | STATIC ssize_t | |
159 | xfs_file_splice_write_invis( | |
3a326a2c | 160 | struct pipe_inode_info *pipe, |
1b895840 | 161 | struct file *outfilp, |
cbb7e577 | 162 | loff_t *ppos, |
1b895840 NS |
163 | size_t len, |
164 | unsigned int flags) | |
165 | { | |
739bfb2a CH |
166 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
167 | pipe, outfilp, ppos, len, flags, IO_INVIS); | |
1b895840 | 168 | } |
1da177e4 LT |
169 | |
170 | STATIC int | |
3562fd45 | 171 | xfs_file_open( |
1da177e4 | 172 | struct inode *inode, |
f999a5bf | 173 | struct file *file) |
1da177e4 | 174 | { |
f999a5bf | 175 | if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
1da177e4 | 176 | return -EFBIG; |
f999a5bf CH |
177 | if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb))) |
178 | return -EIO; | |
179 | return 0; | |
180 | } | |
181 | ||
182 | STATIC int | |
183 | xfs_dir_open( | |
184 | struct inode *inode, | |
185 | struct file *file) | |
186 | { | |
187 | struct xfs_inode *ip = XFS_I(inode); | |
188 | int mode; | |
189 | int error; | |
190 | ||
191 | error = xfs_file_open(inode, file); | |
192 | if (error) | |
193 | return error; | |
194 | ||
195 | /* | |
196 | * If there are any blocks, read-ahead block 0 as we're almost | |
197 | * certain to have the next operation be a read there. | |
198 | */ | |
199 | mode = xfs_ilock_map_shared(ip); | |
200 | if (ip->i_d.di_nextents > 0) | |
201 | xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); | |
202 | xfs_iunlock(ip, mode); | |
203 | return 0; | |
1da177e4 LT |
204 | } |
205 | ||
1da177e4 | 206 | STATIC int |
3562fd45 | 207 | xfs_file_release( |
1da177e4 LT |
208 | struct inode *inode, |
209 | struct file *filp) | |
210 | { | |
739bfb2a | 211 | return -xfs_release(XFS_I(inode)); |
1da177e4 LT |
212 | } |
213 | ||
978b7237 DC |
214 | /* |
215 | * We ignore the datasync flag here because a datasync is effectively | |
216 | * identical to an fsync. That is, datasync implies that we need to write | |
217 | * only the metadata needed to be able to access the data that is written | |
218 | * if we crash after the call completes. Hence if we are writing beyond | |
219 | * EOF we have to log the inode size change as well, which makes it a | |
220 | * full fsync. If we don't write beyond EOF, the inode core will be | |
221 | * clean in memory and so we don't need to log the inode, just like | |
222 | * fsync. | |
223 | */ | |
1da177e4 | 224 | STATIC int |
3562fd45 | 225 | xfs_file_fsync( |
1da177e4 LT |
226 | struct file *filp, |
227 | struct dentry *dentry, | |
228 | int datasync) | |
229 | { | |
b3aea4ed | 230 | xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED); |
978b7237 | 231 | return -xfs_fsync(XFS_I(dentry->d_inode)); |
1da177e4 LT |
232 | } |
233 | ||
1da177e4 | 234 | STATIC int |
3562fd45 | 235 | xfs_file_readdir( |
1da177e4 LT |
236 | struct file *filp, |
237 | void *dirent, | |
238 | filldir_t filldir) | |
239 | { | |
051e7cd4 | 240 | struct inode *inode = filp->f_path.dentry->d_inode; |
739bfb2a | 241 | xfs_inode_t *ip = XFS_I(inode); |
051e7cd4 CH |
242 | int error; |
243 | size_t bufsize; | |
244 | ||
245 | /* | |
246 | * The Linux API doesn't pass down the total size of the buffer | |
247 | * we read into down to the filesystem. With the filldir concept | |
248 | * it's not needed for correct information, but the XFS dir2 leaf | |
249 | * code wants an estimate of the buffer size to calculate it's | |
250 | * readahead window and size the buffers used for mapping to | |
251 | * physical blocks. | |
252 | * | |
253 | * Try to give it an estimate that's good enough, maybe at some | |
254 | * point we can change the ->readdir prototype to include the | |
255 | * buffer size. | |
256 | */ | |
257 | bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size); | |
258 | ||
739bfb2a | 259 | error = xfs_readdir(ip, dirent, bufsize, |
051e7cd4 CH |
260 | (xfs_off_t *)&filp->f_pos, filldir); |
261 | if (error) | |
262 | return -error; | |
263 | return 0; | |
1da177e4 LT |
264 | } |
265 | ||
1da177e4 | 266 | STATIC int |
3562fd45 | 267 | xfs_file_mmap( |
1da177e4 LT |
268 | struct file *filp, |
269 | struct vm_area_struct *vma) | |
270 | { | |
3562fd45 | 271 | vma->vm_ops = &xfs_file_vm_ops; |
d0217ac0 | 272 | vma->vm_flags |= VM_CAN_NONLINEAR; |
6fac0cb4 | 273 | |
fbc1462b | 274 | file_accessed(filp); |
1da177e4 LT |
275 | return 0; |
276 | } | |
277 | ||
1da177e4 | 278 | STATIC long |
3562fd45 | 279 | xfs_file_ioctl( |
1da177e4 LT |
280 | struct file *filp, |
281 | unsigned int cmd, | |
67fcaa73 | 282 | unsigned long p) |
1da177e4 LT |
283 | { |
284 | int error; | |
e678fb0d | 285 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 | 286 | |
739bfb2a | 287 | error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p); |
b3aea4ed | 288 | xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED); |
1da177e4 LT |
289 | |
290 | /* NOTE: some of the ioctl's return positive #'s as a | |
291 | * byte count indicating success, such as | |
292 | * readlink_by_handle. So we don't "sign flip" | |
293 | * like most other routines. This means true | |
294 | * errors need to be returned as a negative value. | |
295 | */ | |
296 | return error; | |
297 | } | |
298 | ||
299 | STATIC long | |
3562fd45 | 300 | xfs_file_ioctl_invis( |
1da177e4 LT |
301 | struct file *filp, |
302 | unsigned int cmd, | |
67fcaa73 | 303 | unsigned long p) |
1da177e4 | 304 | { |
1b895840 | 305 | int error; |
e678fb0d | 306 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 | 307 | |
739bfb2a | 308 | error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p); |
b3aea4ed | 309 | xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED); |
1da177e4 LT |
310 | |
311 | /* NOTE: some of the ioctl's return positive #'s as a | |
312 | * byte count indicating success, such as | |
313 | * readlink_by_handle. So we don't "sign flip" | |
314 | * like most other routines. This means true | |
315 | * errors need to be returned as a negative value. | |
316 | */ | |
317 | return error; | |
318 | } | |
319 | ||
4f57dbc6 DC |
320 | /* |
321 | * mmap()d file has taken write protection fault and is being made | |
322 | * writable. We can set the page state up correctly for a writable | |
323 | * page, which means we can do correct delalloc accounting (ENOSPC | |
324 | * checking!) and unwritten extent mapping. | |
325 | */ | |
326 | STATIC int | |
327 | xfs_vm_page_mkwrite( | |
328 | struct vm_area_struct *vma, | |
329 | struct page *page) | |
330 | { | |
331 | return block_page_mkwrite(vma, page, xfs_get_blocks); | |
332 | } | |
333 | ||
4b6f5d20 | 334 | const struct file_operations xfs_file_operations = { |
1da177e4 LT |
335 | .llseek = generic_file_llseek, |
336 | .read = do_sync_read, | |
bb3f724e | 337 | .write = do_sync_write, |
3562fd45 NS |
338 | .aio_read = xfs_file_aio_read, |
339 | .aio_write = xfs_file_aio_write, | |
1b895840 NS |
340 | .splice_read = xfs_file_splice_read, |
341 | .splice_write = xfs_file_splice_write, | |
3562fd45 | 342 | .unlocked_ioctl = xfs_file_ioctl, |
1da177e4 | 343 | #ifdef CONFIG_COMPAT |
3562fd45 | 344 | .compat_ioctl = xfs_file_compat_ioctl, |
1da177e4 | 345 | #endif |
3562fd45 NS |
346 | .mmap = xfs_file_mmap, |
347 | .open = xfs_file_open, | |
348 | .release = xfs_file_release, | |
349 | .fsync = xfs_file_fsync, | |
1da177e4 | 350 | #ifdef HAVE_FOP_OPEN_EXEC |
3562fd45 | 351 | .open_exec = xfs_file_open_exec, |
1da177e4 LT |
352 | #endif |
353 | }; | |
354 | ||
4b6f5d20 | 355 | const struct file_operations xfs_invis_file_operations = { |
1da177e4 LT |
356 | .llseek = generic_file_llseek, |
357 | .read = do_sync_read, | |
bb3f724e | 358 | .write = do_sync_write, |
3562fd45 NS |
359 | .aio_read = xfs_file_aio_read_invis, |
360 | .aio_write = xfs_file_aio_write_invis, | |
1b895840 NS |
361 | .splice_read = xfs_file_splice_read_invis, |
362 | .splice_write = xfs_file_splice_write_invis, | |
3562fd45 | 363 | .unlocked_ioctl = xfs_file_ioctl_invis, |
1da177e4 | 364 | #ifdef CONFIG_COMPAT |
3562fd45 | 365 | .compat_ioctl = xfs_file_compat_invis_ioctl, |
1da177e4 | 366 | #endif |
3562fd45 NS |
367 | .mmap = xfs_file_mmap, |
368 | .open = xfs_file_open, | |
369 | .release = xfs_file_release, | |
370 | .fsync = xfs_file_fsync, | |
1da177e4 LT |
371 | }; |
372 | ||
373 | ||
4b6f5d20 | 374 | const struct file_operations xfs_dir_file_operations = { |
f999a5bf | 375 | .open = xfs_dir_open, |
1da177e4 | 376 | .read = generic_read_dir, |
3562fd45 | 377 | .readdir = xfs_file_readdir, |
59af1584 | 378 | .llseek = generic_file_llseek, |
3562fd45 | 379 | .unlocked_ioctl = xfs_file_ioctl, |
d3870398 | 380 | #ifdef CONFIG_COMPAT |
3562fd45 | 381 | .compat_ioctl = xfs_file_compat_ioctl, |
d3870398 | 382 | #endif |
3562fd45 | 383 | .fsync = xfs_file_fsync, |
1da177e4 LT |
384 | }; |
385 | ||
3562fd45 | 386 | static struct vm_operations_struct xfs_file_vm_ops = { |
54cb8821 | 387 | .fault = filemap_fault, |
4f57dbc6 | 388 | .page_mkwrite = xfs_vm_page_mkwrite, |
6fac0cb4 | 389 | }; |