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" |
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; |
6fac0cb4 | 46 | #ifdef CONFIG_XFS_DMAPI |
3562fd45 | 47 | static struct vm_operations_struct xfs_dmapi_file_vm_ops; |
6fac0cb4 | 48 | #endif |
1da177e4 | 49 | |
7989cb8e | 50 | STATIC_INLINE ssize_t |
3562fd45 | 51 | __xfs_file_read( |
1da177e4 | 52 | struct kiocb *iocb, |
027445c3 BP |
53 | const struct iovec *iov, |
54 | unsigned long nr_segs, | |
1da177e4 | 55 | int ioflags, |
1da177e4 LT |
56 | loff_t pos) |
57 | { | |
1da177e4 | 58 | struct file *file = iocb->ki_filp; |
1da177e4 LT |
59 | |
60 | BUG_ON(iocb->ki_pos != pos); | |
1da177e4 LT |
61 | if (unlikely(file->f_flags & O_DIRECT)) |
62 | ioflags |= IO_ISDIRECT; | |
739bfb2a CH |
63 | return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov, |
64 | nr_segs, &iocb->ki_pos, ioflags); | |
1da177e4 LT |
65 | } |
66 | ||
1da177e4 | 67 | STATIC ssize_t |
3562fd45 | 68 | xfs_file_aio_read( |
1da177e4 | 69 | struct kiocb *iocb, |
027445c3 BP |
70 | const struct iovec *iov, |
71 | unsigned long nr_segs, | |
1da177e4 LT |
72 | loff_t pos) |
73 | { | |
027445c3 | 74 | return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos); |
1da177e4 LT |
75 | } |
76 | ||
77 | STATIC ssize_t | |
3562fd45 | 78 | xfs_file_aio_read_invis( |
1da177e4 | 79 | struct kiocb *iocb, |
027445c3 BP |
80 | const struct iovec *iov, |
81 | unsigned long nr_segs, | |
1da177e4 LT |
82 | loff_t pos) |
83 | { | |
027445c3 | 84 | return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); |
1da177e4 LT |
85 | } |
86 | ||
7989cb8e | 87 | STATIC_INLINE ssize_t |
3562fd45 | 88 | __xfs_file_write( |
027445c3 BP |
89 | struct kiocb *iocb, |
90 | const struct iovec *iov, | |
91 | unsigned long nr_segs, | |
92 | int ioflags, | |
93 | loff_t pos) | |
1da177e4 | 94 | { |
1da177e4 | 95 | struct file *file = iocb->ki_filp; |
1da177e4 LT |
96 | |
97 | BUG_ON(iocb->ki_pos != pos); | |
98 | if (unlikely(file->f_flags & O_DIRECT)) | |
99 | ioflags |= IO_ISDIRECT; | |
739bfb2a CH |
100 | return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs, |
101 | &iocb->ki_pos, ioflags); | |
1da177e4 LT |
102 | } |
103 | ||
1da177e4 | 104 | STATIC ssize_t |
3562fd45 | 105 | xfs_file_aio_write( |
1da177e4 | 106 | struct kiocb *iocb, |
027445c3 BP |
107 | const struct iovec *iov, |
108 | unsigned long nr_segs, | |
1da177e4 LT |
109 | loff_t pos) |
110 | { | |
027445c3 | 111 | return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos); |
1da177e4 LT |
112 | } |
113 | ||
114 | STATIC ssize_t | |
3562fd45 | 115 | xfs_file_aio_write_invis( |
1da177e4 | 116 | struct kiocb *iocb, |
027445c3 BP |
117 | const struct iovec *iov, |
118 | unsigned long nr_segs, | |
1da177e4 LT |
119 | loff_t pos) |
120 | { | |
027445c3 | 121 | return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos); |
1da177e4 LT |
122 | } |
123 | ||
1b895840 NS |
124 | STATIC ssize_t |
125 | xfs_file_splice_read( | |
126 | struct file *infilp, | |
cbb7e577 | 127 | loff_t *ppos, |
3a326a2c | 128 | struct pipe_inode_info *pipe, |
1b895840 NS |
129 | size_t len, |
130 | unsigned int flags) | |
131 | { | |
739bfb2a CH |
132 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
133 | infilp, ppos, pipe, len, flags, 0); | |
1b895840 NS |
134 | } |
135 | ||
136 | STATIC ssize_t | |
137 | xfs_file_splice_read_invis( | |
138 | struct file *infilp, | |
cbb7e577 | 139 | loff_t *ppos, |
3a326a2c | 140 | struct pipe_inode_info *pipe, |
1b895840 NS |
141 | size_t len, |
142 | unsigned int flags) | |
143 | { | |
739bfb2a CH |
144 | return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode), |
145 | infilp, ppos, pipe, len, flags, IO_INVIS); | |
1b895840 NS |
146 | } |
147 | ||
148 | STATIC ssize_t | |
149 | xfs_file_splice_write( | |
3a326a2c | 150 | struct pipe_inode_info *pipe, |
1b895840 | 151 | struct file *outfilp, |
cbb7e577 | 152 | loff_t *ppos, |
1b895840 NS |
153 | size_t len, |
154 | unsigned int flags) | |
155 | { | |
739bfb2a CH |
156 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
157 | pipe, outfilp, ppos, len, flags, 0); | |
1b895840 NS |
158 | } |
159 | ||
160 | STATIC ssize_t | |
161 | xfs_file_splice_write_invis( | |
3a326a2c | 162 | struct pipe_inode_info *pipe, |
1b895840 | 163 | struct file *outfilp, |
cbb7e577 | 164 | loff_t *ppos, |
1b895840 NS |
165 | size_t len, |
166 | unsigned int flags) | |
167 | { | |
739bfb2a CH |
168 | return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode), |
169 | pipe, outfilp, ppos, len, flags, IO_INVIS); | |
1b895840 | 170 | } |
1da177e4 LT |
171 | |
172 | STATIC int | |
3562fd45 | 173 | xfs_file_open( |
1da177e4 LT |
174 | struct inode *inode, |
175 | struct file *filp) | |
176 | { | |
1da177e4 LT |
177 | if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) |
178 | return -EFBIG; | |
739bfb2a | 179 | return -xfs_open(XFS_I(inode)); |
1da177e4 LT |
180 | } |
181 | ||
1da177e4 | 182 | STATIC int |
3562fd45 | 183 | xfs_file_release( |
1da177e4 LT |
184 | struct inode *inode, |
185 | struct file *filp) | |
186 | { | |
739bfb2a | 187 | return -xfs_release(XFS_I(inode)); |
1da177e4 LT |
188 | } |
189 | ||
1da177e4 | 190 | STATIC int |
3562fd45 | 191 | xfs_file_fsync( |
1da177e4 LT |
192 | struct file *filp, |
193 | struct dentry *dentry, | |
194 | int datasync) | |
195 | { | |
1da177e4 LT |
196 | int flags = FSYNC_WAIT; |
197 | ||
198 | if (datasync) | |
199 | flags |= FSYNC_DATA; | |
b3aea4ed | 200 | xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED); |
739bfb2a CH |
201 | return -xfs_fsync(XFS_I(dentry->d_inode), flags, |
202 | (xfs_off_t)0, (xfs_off_t)-1); | |
1da177e4 LT |
203 | } |
204 | ||
bb3f724e | 205 | #ifdef CONFIG_XFS_DMAPI |
d0217ac0 | 206 | STATIC int |
54cb8821 NP |
207 | xfs_vm_fault( |
208 | struct vm_area_struct *vma, | |
d0217ac0 | 209 | struct vm_fault *vmf) |
bb3f724e | 210 | { |
54cb8821 | 211 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
67fcaa73 | 212 | bhv_vnode_t *vp = vn_from_inode(inode); |
bb3f724e DR |
213 | |
214 | ASSERT_ALWAYS(vp->v_vfsp->vfs_flag & VFS_DMI); | |
d0217ac0 NP |
215 | if (XFS_SEND_MMAP(XFS_VFSTOM(vp->v_vfsp), vma, 0)) |
216 | return VM_FAULT_SIGBUS; | |
217 | return filemap_fault(vma, vmf); | |
bb3f724e | 218 | } |
bb3f724e DR |
219 | #endif /* CONFIG_XFS_DMAPI */ |
220 | ||
1da177e4 | 221 | STATIC int |
3562fd45 | 222 | xfs_file_readdir( |
1da177e4 LT |
223 | struct file *filp, |
224 | void *dirent, | |
225 | filldir_t filldir) | |
226 | { | |
051e7cd4 | 227 | struct inode *inode = filp->f_path.dentry->d_inode; |
739bfb2a | 228 | xfs_inode_t *ip = XFS_I(inode); |
051e7cd4 CH |
229 | int error; |
230 | size_t bufsize; | |
231 | ||
232 | /* | |
233 | * The Linux API doesn't pass down the total size of the buffer | |
234 | * we read into down to the filesystem. With the filldir concept | |
235 | * it's not needed for correct information, but the XFS dir2 leaf | |
236 | * code wants an estimate of the buffer size to calculate it's | |
237 | * readahead window and size the buffers used for mapping to | |
238 | * physical blocks. | |
239 | * | |
240 | * Try to give it an estimate that's good enough, maybe at some | |
241 | * point we can change the ->readdir prototype to include the | |
242 | * buffer size. | |
243 | */ | |
244 | bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size); | |
245 | ||
739bfb2a | 246 | error = xfs_readdir(ip, dirent, bufsize, |
051e7cd4 CH |
247 | (xfs_off_t *)&filp->f_pos, filldir); |
248 | if (error) | |
249 | return -error; | |
250 | return 0; | |
1da177e4 LT |
251 | } |
252 | ||
1da177e4 | 253 | STATIC int |
3562fd45 | 254 | xfs_file_mmap( |
1da177e4 LT |
255 | struct file *filp, |
256 | struct vm_area_struct *vma) | |
257 | { | |
3562fd45 | 258 | vma->vm_ops = &xfs_file_vm_ops; |
d0217ac0 | 259 | vma->vm_flags |= VM_CAN_NONLINEAR; |
6fac0cb4 | 260 | |
6fac0cb4 | 261 | #ifdef CONFIG_XFS_DMAPI |
2f6f7b3d | 262 | if (vfs_from_sb(filp->f_path.dentry->d_inode->i_sb)->vfs_flag & VFS_DMI) |
3562fd45 | 263 | vma->vm_ops = &xfs_dmapi_file_vm_ops; |
bb3f724e | 264 | #endif /* CONFIG_XFS_DMAPI */ |
1da177e4 | 265 | |
fbc1462b | 266 | file_accessed(filp); |
1da177e4 LT |
267 | return 0; |
268 | } | |
269 | ||
1da177e4 | 270 | STATIC long |
3562fd45 | 271 | xfs_file_ioctl( |
1da177e4 LT |
272 | struct file *filp, |
273 | unsigned int cmd, | |
67fcaa73 | 274 | unsigned long p) |
1da177e4 LT |
275 | { |
276 | int error; | |
e678fb0d | 277 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 | 278 | |
739bfb2a | 279 | error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p); |
b3aea4ed | 280 | xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED); |
1da177e4 LT |
281 | |
282 | /* NOTE: some of the ioctl's return positive #'s as a | |
283 | * byte count indicating success, such as | |
284 | * readlink_by_handle. So we don't "sign flip" | |
285 | * like most other routines. This means true | |
286 | * errors need to be returned as a negative value. | |
287 | */ | |
288 | return error; | |
289 | } | |
290 | ||
291 | STATIC long | |
3562fd45 | 292 | xfs_file_ioctl_invis( |
1da177e4 LT |
293 | struct file *filp, |
294 | unsigned int cmd, | |
67fcaa73 | 295 | unsigned long p) |
1da177e4 | 296 | { |
1b895840 | 297 | int error; |
e678fb0d | 298 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 | 299 | |
739bfb2a | 300 | error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p); |
b3aea4ed | 301 | xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED); |
1da177e4 LT |
302 | |
303 | /* NOTE: some of the ioctl's return positive #'s as a | |
304 | * byte count indicating success, such as | |
305 | * readlink_by_handle. So we don't "sign flip" | |
306 | * like most other routines. This means true | |
307 | * errors need to be returned as a negative value. | |
308 | */ | |
309 | return error; | |
310 | } | |
311 | ||
bb3f724e | 312 | #ifdef CONFIG_XFS_DMAPI |
1da177e4 LT |
313 | #ifdef HAVE_VMOP_MPROTECT |
314 | STATIC int | |
3562fd45 | 315 | xfs_vm_mprotect( |
1da177e4 LT |
316 | struct vm_area_struct *vma, |
317 | unsigned int newflags) | |
318 | { | |
2f6f7b3d CH |
319 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
320 | bhv_vfs_t *vfsp = vfs_from_sb(inode->i_sb); | |
1da177e4 LT |
321 | int error = 0; |
322 | ||
2f6f7b3d | 323 | if (vfsp->vfs_flag & VFS_DMI) { |
1da177e4 | 324 | if ((vma->vm_flags & VM_MAYSHARE) && |
2f6f7b3d CH |
325 | (newflags & VM_WRITE) && !(vma->vm_flags & VM_WRITE)) |
326 | error = XFS_SEND_MMAP(XFS_VFSTOM(vfsp), vma, VM_WRITE); | |
1da177e4 LT |
327 | } |
328 | return error; | |
329 | } | |
330 | #endif /* HAVE_VMOP_MPROTECT */ | |
bb3f724e | 331 | #endif /* CONFIG_XFS_DMAPI */ |
1da177e4 LT |
332 | |
333 | #ifdef HAVE_FOP_OPEN_EXEC | |
334 | /* If the user is attempting to execute a file that is offline then | |
335 | * we have to trigger a DMAPI READ event before the file is marked as busy | |
336 | * otherwise the invisible I/O will not be able to write to the file to bring | |
337 | * it back online. | |
338 | */ | |
339 | STATIC int | |
3562fd45 | 340 | xfs_file_open_exec( |
1da177e4 LT |
341 | struct inode *inode) |
342 | { | |
2f6f7b3d | 343 | bhv_vfs_t *vfsp = vfs_from_sb(inode->i_sb); |
1da177e4 | 344 | |
2f6f7b3d CH |
345 | if (unlikely(vfsp->vfs_flag & VFS_DMI)) { |
346 | if (DM_EVENT_ENABLED(XFS_I(inode), DM_EVENT_READ)) { | |
347 | bhv_vnode_t *vp = vn_from_inode(inode); | |
1d47bec2 | 348 | |
2f6f7b3d CH |
349 | return -XFS_SEND_DATA(XFS_VFSTOM(vfsp), DM_EVENT_READ, |
350 | vp, 0, 0, 0, NULL); | |
351 | } | |
1da177e4 | 352 | } |
2f6f7b3d | 353 | |
1d47bec2 | 354 | return 0; |
1da177e4 LT |
355 | } |
356 | #endif /* HAVE_FOP_OPEN_EXEC */ | |
357 | ||
4f57dbc6 DC |
358 | /* |
359 | * mmap()d file has taken write protection fault and is being made | |
360 | * writable. We can set the page state up correctly for a writable | |
361 | * page, which means we can do correct delalloc accounting (ENOSPC | |
362 | * checking!) and unwritten extent mapping. | |
363 | */ | |
364 | STATIC int | |
365 | xfs_vm_page_mkwrite( | |
366 | struct vm_area_struct *vma, | |
367 | struct page *page) | |
368 | { | |
369 | return block_page_mkwrite(vma, page, xfs_get_blocks); | |
370 | } | |
371 | ||
4b6f5d20 | 372 | const struct file_operations xfs_file_operations = { |
1da177e4 LT |
373 | .llseek = generic_file_llseek, |
374 | .read = do_sync_read, | |
bb3f724e | 375 | .write = do_sync_write, |
3562fd45 NS |
376 | .aio_read = xfs_file_aio_read, |
377 | .aio_write = xfs_file_aio_write, | |
1b895840 NS |
378 | .splice_read = xfs_file_splice_read, |
379 | .splice_write = xfs_file_splice_write, | |
3562fd45 | 380 | .unlocked_ioctl = xfs_file_ioctl, |
1da177e4 | 381 | #ifdef CONFIG_COMPAT |
3562fd45 | 382 | .compat_ioctl = xfs_file_compat_ioctl, |
1da177e4 | 383 | #endif |
3562fd45 NS |
384 | .mmap = xfs_file_mmap, |
385 | .open = xfs_file_open, | |
386 | .release = xfs_file_release, | |
387 | .fsync = xfs_file_fsync, | |
1da177e4 | 388 | #ifdef HAVE_FOP_OPEN_EXEC |
3562fd45 | 389 | .open_exec = xfs_file_open_exec, |
1da177e4 LT |
390 | #endif |
391 | }; | |
392 | ||
4b6f5d20 | 393 | const struct file_operations xfs_invis_file_operations = { |
1da177e4 LT |
394 | .llseek = generic_file_llseek, |
395 | .read = do_sync_read, | |
bb3f724e | 396 | .write = do_sync_write, |
3562fd45 NS |
397 | .aio_read = xfs_file_aio_read_invis, |
398 | .aio_write = xfs_file_aio_write_invis, | |
1b895840 NS |
399 | .splice_read = xfs_file_splice_read_invis, |
400 | .splice_write = xfs_file_splice_write_invis, | |
3562fd45 | 401 | .unlocked_ioctl = xfs_file_ioctl_invis, |
1da177e4 | 402 | #ifdef CONFIG_COMPAT |
3562fd45 | 403 | .compat_ioctl = xfs_file_compat_invis_ioctl, |
1da177e4 | 404 | #endif |
3562fd45 NS |
405 | .mmap = xfs_file_mmap, |
406 | .open = xfs_file_open, | |
407 | .release = xfs_file_release, | |
408 | .fsync = xfs_file_fsync, | |
1da177e4 LT |
409 | }; |
410 | ||
411 | ||
4b6f5d20 | 412 | const struct file_operations xfs_dir_file_operations = { |
1da177e4 | 413 | .read = generic_read_dir, |
3562fd45 NS |
414 | .readdir = xfs_file_readdir, |
415 | .unlocked_ioctl = xfs_file_ioctl, | |
d3870398 | 416 | #ifdef CONFIG_COMPAT |
3562fd45 | 417 | .compat_ioctl = xfs_file_compat_ioctl, |
d3870398 | 418 | #endif |
3562fd45 | 419 | .fsync = xfs_file_fsync, |
1da177e4 LT |
420 | }; |
421 | ||
3562fd45 | 422 | static struct vm_operations_struct xfs_file_vm_ops = { |
54cb8821 | 423 | .fault = filemap_fault, |
4f57dbc6 | 424 | .page_mkwrite = xfs_vm_page_mkwrite, |
6fac0cb4 DR |
425 | }; |
426 | ||
427 | #ifdef CONFIG_XFS_DMAPI | |
3562fd45 | 428 | static struct vm_operations_struct xfs_dmapi_file_vm_ops = { |
54cb8821 | 429 | .fault = xfs_vm_fault, |
4f57dbc6 | 430 | .page_mkwrite = xfs_vm_page_mkwrite, |
1da177e4 | 431 | #ifdef HAVE_VMOP_MPROTECT |
3562fd45 | 432 | .mprotect = xfs_vm_mprotect, |
1da177e4 LT |
433 | #endif |
434 | }; | |
6fac0cb4 | 435 | #endif /* CONFIG_XFS_DMAPI */ |