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