]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - fs/orangefs/namei.c
Merge remote-tracking branches 'asoc/topic/inntel', 'asoc/topic/input', 'asoc/topic...
[mirror_ubuntu-bionic-kernel.git] / fs / orangefs / namei.c
1 /*
2 * (C) 2001 Clemson University and The University of Chicago
3 *
4 * See COPYING in top-level directory.
5 */
6
7 /*
8 * Linux VFS namei operations.
9 */
10
11 #include "protocol.h"
12 #include "orangefs-kernel.h"
13
14 /*
15 * Get a newly allocated inode to go with a negative dentry.
16 */
17 static int orangefs_create(struct inode *dir,
18 struct dentry *dentry,
19 umode_t mode,
20 bool exclusive)
21 {
22 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
23 struct orangefs_kernel_op_s *new_op;
24 struct inode *inode;
25 int ret;
26
27 gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
28 __func__,
29 dentry);
30
31 new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
32 if (!new_op)
33 return -ENOMEM;
34
35 new_op->upcall.req.create.parent_refn = parent->refn;
36
37 fill_default_sys_attrs(new_op->upcall.req.create.attributes,
38 ORANGEFS_TYPE_METAFILE, mode);
39
40 strncpy(new_op->upcall.req.create.d_name,
41 dentry->d_name.name, ORANGEFS_NAME_MAX);
42
43 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
44
45 gossip_debug(GOSSIP_NAME_DEBUG,
46 "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
47 __func__,
48 dentry,
49 &new_op->downcall.resp.create.refn.khandle,
50 new_op->downcall.resp.create.refn.fs_id,
51 new_op,
52 ret);
53
54 if (ret < 0)
55 goto out;
56
57 inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0,
58 &new_op->downcall.resp.create.refn);
59 if (IS_ERR(inode)) {
60 gossip_err("%s: Failed to allocate inode for file :%pd:\n",
61 __func__,
62 dentry);
63 ret = PTR_ERR(inode);
64 goto out;
65 }
66
67 gossip_debug(GOSSIP_NAME_DEBUG,
68 "%s: Assigned inode :%pU: for file :%pd:\n",
69 __func__,
70 get_khandle_from_ino(inode),
71 dentry);
72
73 d_instantiate(dentry, inode);
74 unlock_new_inode(inode);
75 orangefs_set_timeout(dentry);
76 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
77
78 gossip_debug(GOSSIP_NAME_DEBUG,
79 "%s: dentry instantiated for %pd\n",
80 __func__,
81 dentry);
82
83 SetMtimeFlag(parent);
84 dir->i_mtime = dir->i_ctime = current_time(dir);
85 mark_inode_dirty_sync(dir);
86 ret = 0;
87 out:
88 op_release(new_op);
89 gossip_debug(GOSSIP_NAME_DEBUG,
90 "%s: %pd: returning %d\n",
91 __func__,
92 dentry,
93 ret);
94 return ret;
95 }
96
97 /*
98 * Attempt to resolve an object name (dentry->d_name), parent handle, and
99 * fsid into a handle for the object.
100 */
101 static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
102 unsigned int flags)
103 {
104 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
105 struct orangefs_kernel_op_s *new_op;
106 struct inode *inode;
107 struct dentry *res;
108 int ret = -EINVAL;
109
110 /*
111 * in theory we could skip a lookup here (if the intent is to
112 * create) in order to avoid a potentially failed lookup, but
113 * leaving it in can skip a valid lookup and try to create a file
114 * that already exists (e.g. the vfs already handles checking for
115 * -EEXIST on O_EXCL opens, which is broken if we skip this lookup
116 * in the create path)
117 */
118 gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
119 __func__, dentry);
120
121 if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
122 return ERR_PTR(-ENAMETOOLONG);
123
124 new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
125 if (!new_op)
126 return ERR_PTR(-ENOMEM);
127
128 new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
129
130 gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
131 __FILE__,
132 __func__,
133 __LINE__,
134 &parent->refn.khandle);
135 new_op->upcall.req.lookup.parent_refn = parent->refn;
136
137 strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
138 ORANGEFS_NAME_MAX);
139
140 gossip_debug(GOSSIP_NAME_DEBUG,
141 "%s: doing lookup on %s under %pU,%d\n",
142 __func__,
143 new_op->upcall.req.lookup.d_name,
144 &new_op->upcall.req.lookup.parent_refn.khandle,
145 new_op->upcall.req.lookup.parent_refn.fs_id);
146
147 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
148
149 gossip_debug(GOSSIP_NAME_DEBUG,
150 "Lookup Got %pU, fsid %d (ret=%d)\n",
151 &new_op->downcall.resp.lookup.refn.khandle,
152 new_op->downcall.resp.lookup.refn.fs_id,
153 ret);
154
155 if (ret < 0) {
156 if (ret == -ENOENT) {
157 /*
158 * if no inode was found, add a negative dentry to
159 * dcache anyway; if we don't, we don't hold expected
160 * lookup semantics and we most noticeably break
161 * during directory renames.
162 *
163 * however, if the operation failed or exited, do not
164 * add the dentry (e.g. in the case that a touch is
165 * issued on a file that already exists that was
166 * interrupted during this lookup -- no need to add
167 * another negative dentry for an existing file)
168 */
169
170 gossip_debug(GOSSIP_NAME_DEBUG,
171 "orangefs_lookup: Adding *negative* dentry "
172 "%p for %pd\n",
173 dentry,
174 dentry);
175
176 d_add(dentry, NULL);
177 res = NULL;
178 goto out;
179 }
180
181 /* must be a non-recoverable error */
182 res = ERR_PTR(ret);
183 goto out;
184 }
185
186 orangefs_set_timeout(dentry);
187
188 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
189 if (IS_ERR(inode)) {
190 gossip_debug(GOSSIP_NAME_DEBUG,
191 "error %ld from iget\n", PTR_ERR(inode));
192 res = ERR_CAST(inode);
193 goto out;
194 }
195
196 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
197
198 gossip_debug(GOSSIP_NAME_DEBUG,
199 "%s:%s:%d "
200 "Found good inode [%lu] with count [%d]\n",
201 __FILE__,
202 __func__,
203 __LINE__,
204 inode->i_ino,
205 (int)atomic_read(&inode->i_count));
206
207 /* update dentry/inode pair into dcache */
208 res = d_splice_alias(inode, dentry);
209
210 gossip_debug(GOSSIP_NAME_DEBUG,
211 "Lookup success (inode ct = %d)\n",
212 (int)atomic_read(&inode->i_count));
213 out:
214 op_release(new_op);
215 return res;
216 }
217
218 /* return 0 on success; non-zero otherwise */
219 static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
220 {
221 struct inode *inode = dentry->d_inode;
222 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
223 struct orangefs_kernel_op_s *new_op;
224 int ret;
225
226 gossip_debug(GOSSIP_NAME_DEBUG,
227 "%s: called on %pd\n"
228 " (inode %pU): Parent is %pU | fs_id %d\n",
229 __func__,
230 dentry,
231 get_khandle_from_ino(inode),
232 &parent->refn.khandle,
233 parent->refn.fs_id);
234
235 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
236 if (!new_op)
237 return -ENOMEM;
238
239 new_op->upcall.req.remove.parent_refn = parent->refn;
240 strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
241 ORANGEFS_NAME_MAX);
242
243 ret = service_operation(new_op, "orangefs_unlink",
244 get_interruptible_flag(inode));
245
246 gossip_debug(GOSSIP_NAME_DEBUG,
247 "%s: service_operation returned:%d:\n",
248 __func__,
249 ret);
250
251 op_release(new_op);
252
253 if (!ret) {
254 drop_nlink(inode);
255
256 SetMtimeFlag(parent);
257 dir->i_mtime = dir->i_ctime = current_time(dir);
258 mark_inode_dirty_sync(dir);
259 }
260 return ret;
261 }
262
263 static int orangefs_symlink(struct inode *dir,
264 struct dentry *dentry,
265 const char *symname)
266 {
267 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
268 struct orangefs_kernel_op_s *new_op;
269 struct inode *inode;
270 int mode = 755;
271 int ret;
272
273 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
274
275 if (!symname)
276 return -EINVAL;
277
278 if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
279 return -ENAMETOOLONG;
280
281 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
282 if (!new_op)
283 return -ENOMEM;
284
285 new_op->upcall.req.sym.parent_refn = parent->refn;
286
287 fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
288 ORANGEFS_TYPE_SYMLINK,
289 mode);
290
291 strncpy(new_op->upcall.req.sym.entry_name,
292 dentry->d_name.name,
293 ORANGEFS_NAME_MAX);
294 strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);
295
296 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
297
298 gossip_debug(GOSSIP_NAME_DEBUG,
299 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
300 &new_op->downcall.resp.sym.refn.khandle,
301 new_op->downcall.resp.sym.refn.fs_id, ret);
302
303 if (ret < 0) {
304 gossip_debug(GOSSIP_NAME_DEBUG,
305 "%s: failed with error code %d\n",
306 __func__, ret);
307 goto out;
308 }
309
310 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0,
311 &new_op->downcall.resp.sym.refn);
312 if (IS_ERR(inode)) {
313 gossip_err
314 ("*** Failed to allocate orangefs symlink inode\n");
315 ret = PTR_ERR(inode);
316 goto out;
317 }
318
319 gossip_debug(GOSSIP_NAME_DEBUG,
320 "Assigned symlink inode new number of %pU\n",
321 get_khandle_from_ino(inode));
322
323 d_instantiate(dentry, inode);
324 unlock_new_inode(inode);
325 orangefs_set_timeout(dentry);
326 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
327
328 gossip_debug(GOSSIP_NAME_DEBUG,
329 "Inode (Symlink) %pU -> %pd\n",
330 get_khandle_from_ino(inode),
331 dentry);
332
333 SetMtimeFlag(parent);
334 dir->i_mtime = dir->i_ctime = current_time(dir);
335 mark_inode_dirty_sync(dir);
336 ret = 0;
337 out:
338 op_release(new_op);
339 return ret;
340 }
341
342 static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
343 {
344 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
345 struct orangefs_kernel_op_s *new_op;
346 struct inode *inode;
347 int ret;
348
349 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
350 if (!new_op)
351 return -ENOMEM;
352
353 new_op->upcall.req.mkdir.parent_refn = parent->refn;
354
355 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
356 ORANGEFS_TYPE_DIRECTORY, mode);
357
358 strncpy(new_op->upcall.req.mkdir.d_name,
359 dentry->d_name.name, ORANGEFS_NAME_MAX);
360
361 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
362
363 gossip_debug(GOSSIP_NAME_DEBUG,
364 "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
365 &new_op->downcall.resp.mkdir.refn.khandle,
366 new_op->downcall.resp.mkdir.refn.fs_id);
367
368 if (ret < 0) {
369 gossip_debug(GOSSIP_NAME_DEBUG,
370 "%s: failed with error code %d\n",
371 __func__, ret);
372 goto out;
373 }
374
375 inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0,
376 &new_op->downcall.resp.mkdir.refn);
377 if (IS_ERR(inode)) {
378 gossip_err("*** Failed to allocate orangefs dir inode\n");
379 ret = PTR_ERR(inode);
380 goto out;
381 }
382
383 gossip_debug(GOSSIP_NAME_DEBUG,
384 "Assigned dir inode new number of %pU\n",
385 get_khandle_from_ino(inode));
386
387 d_instantiate(dentry, inode);
388 unlock_new_inode(inode);
389 orangefs_set_timeout(dentry);
390 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
391
392 gossip_debug(GOSSIP_NAME_DEBUG,
393 "Inode (Directory) %pU -> %pd\n",
394 get_khandle_from_ino(inode),
395 dentry);
396
397 /*
398 * NOTE: we have no good way to keep nlink consistent for directories
399 * across clients; keep constant at 1.
400 */
401 SetMtimeFlag(parent);
402 dir->i_mtime = dir->i_ctime = current_time(dir);
403 mark_inode_dirty_sync(dir);
404 out:
405 op_release(new_op);
406 return ret;
407 }
408
409 static int orangefs_rename(struct inode *old_dir,
410 struct dentry *old_dentry,
411 struct inode *new_dir,
412 struct dentry *new_dentry,
413 unsigned int flags)
414 {
415 struct orangefs_kernel_op_s *new_op;
416 int ret;
417
418 if (flags)
419 return -EINVAL;
420
421 gossip_debug(GOSSIP_NAME_DEBUG,
422 "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
423 old_dentry, new_dentry, d_count(new_dentry));
424
425 ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;
426
427 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
428 if (!new_op)
429 return -EINVAL;
430
431 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
432 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
433
434 strncpy(new_op->upcall.req.rename.d_old_name,
435 old_dentry->d_name.name,
436 ORANGEFS_NAME_MAX);
437 strncpy(new_op->upcall.req.rename.d_new_name,
438 new_dentry->d_name.name,
439 ORANGEFS_NAME_MAX);
440
441 ret = service_operation(new_op,
442 "orangefs_rename",
443 get_interruptible_flag(old_dentry->d_inode));
444
445 gossip_debug(GOSSIP_NAME_DEBUG,
446 "orangefs_rename: got downcall status %d\n",
447 ret);
448
449 if (new_dentry->d_inode)
450 new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);
451
452 op_release(new_op);
453 return ret;
454 }
455
456 /* ORANGEFS implementation of VFS inode operations for directories */
457 const struct inode_operations orangefs_dir_inode_operations = {
458 .lookup = orangefs_lookup,
459 .get_acl = orangefs_get_acl,
460 .set_acl = orangefs_set_acl,
461 .create = orangefs_create,
462 .unlink = orangefs_unlink,
463 .symlink = orangefs_symlink,
464 .mkdir = orangefs_mkdir,
465 .rmdir = orangefs_unlink,
466 .rename = orangefs_rename,
467 .setattr = orangefs_setattr,
468 .getattr = orangefs_getattr,
469 .listxattr = orangefs_listxattr,
470 .permission = orangefs_permission,
471 };