1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * (C) 2001 Clemson University and The University of Chicago
4 *
5 * See COPYING in top-level directory.
6 */
7
8 /*
9 * Linux VFS namei operations.
10 */
11
12 #include "protocol.h"
13 #include "orangefs-kernel.h"
14
15 /*
16 * Get a newly allocated inode to go with a negative dentry.
17 */
orangefs_create(const struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)18 static int orangefs_create(const struct mnt_idmap *idmap,
19 struct inode *dir,
20 struct dentry *dentry,
21 umode_t mode)
22 {
23 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
24 struct orangefs_kernel_op_s *new_op;
25 struct orangefs_object_kref ref;
26 struct inode *inode;
27 struct iattr iattr;
28 int ret;
29
30 gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
31 __func__,
32 dentry);
33
34 new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
35 if (!new_op)
36 return -ENOMEM;
37
38 new_op->upcall.req.create.parent_refn = parent->refn;
39
40 fill_default_sys_attrs(new_op->upcall.req.create.attributes, mode);
41
42 strscpy(new_op->upcall.req.create.d_name, dentry->d_name.name);
43
44 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
45
46 gossip_debug(GOSSIP_NAME_DEBUG,
47 "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
48 __func__,
49 dentry,
50 &new_op->downcall.resp.create.refn.khandle,
51 new_op->downcall.resp.create.refn.fs_id,
52 new_op,
53 ret);
54
55 if (ret < 0)
56 goto out;
57
58 ref = new_op->downcall.resp.create.refn;
59
60 inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref);
61 if (IS_ERR(inode)) {
62 gossip_err("%s: Failed to allocate inode for file :%pd:\n",
63 __func__,
64 dentry);
65 ret = PTR_ERR(inode);
66 goto out;
67 }
68
69 gossip_debug(GOSSIP_NAME_DEBUG,
70 "%s: Assigned inode :%pU: for file :%pd:\n",
71 __func__,
72 get_khandle_from_ino(inode),
73 dentry);
74
75 d_instantiate_new(dentry, inode);
76 orangefs_set_timeout(dentry);
77
78 gossip_debug(GOSSIP_NAME_DEBUG,
79 "%s: dentry instantiated for %pd\n",
80 __func__,
81 dentry);
82
83 memset(&iattr, 0, sizeof iattr);
84 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
85 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
86 __orangefs_setattr(dir, &iattr);
87 ret = 0;
88 out:
89 op_release(new_op);
90 gossip_debug(GOSSIP_NAME_DEBUG,
91 "%s: %pd: returning %d\n",
92 __func__,
93 dentry,
94 ret);
95 return ret;
96 }
97
98 /*
99 * Attempt to resolve an object name (dentry->d_name), parent handle, and
100 * fsid into a handle for the object.
101 */
orangefs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)102 static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
103 unsigned int flags)
104 {
105 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
106 struct orangefs_kernel_op_s *new_op;
107 struct inode *inode;
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 strscpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name);
138
139 gossip_debug(GOSSIP_NAME_DEBUG,
140 "%s: doing lookup on %s under %pU,%d\n",
141 __func__,
142 new_op->upcall.req.lookup.d_name,
143 &new_op->upcall.req.lookup.parent_refn.khandle,
144 new_op->upcall.req.lookup.parent_refn.fs_id);
145
146 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
147
148 gossip_debug(GOSSIP_NAME_DEBUG,
149 "Lookup Got %pU, fsid %d (ret=%d)\n",
150 &new_op->downcall.resp.lookup.refn.khandle,
151 new_op->downcall.resp.lookup.refn.fs_id,
152 ret);
153
154 if (ret == 0) {
155 orangefs_set_timeout(dentry);
156 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
157 } else if (ret == -ENOENT) {
158 inode = NULL;
159 } else {
160 /* must be a non-recoverable error */
161 inode = ERR_PTR(ret);
162 }
163
164 op_release(new_op);
165 return d_splice_alias(inode, dentry);
166 }
167
168 /* return 0 on success; non-zero otherwise */
orangefs_unlink(struct inode * dir,struct dentry * dentry)169 static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
170 {
171 struct inode *inode = dentry->d_inode;
172 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
173 struct orangefs_kernel_op_s *new_op;
174 struct iattr iattr;
175 int ret;
176
177 gossip_debug(GOSSIP_NAME_DEBUG,
178 "%s: called on %pd\n"
179 " (inode %pU): Parent is %pU | fs_id %d\n",
180 __func__,
181 dentry,
182 get_khandle_from_ino(inode),
183 &parent->refn.khandle,
184 parent->refn.fs_id);
185
186 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
187 if (!new_op)
188 return -ENOMEM;
189
190 new_op->upcall.req.remove.parent_refn = parent->refn;
191 strscpy(new_op->upcall.req.remove.d_name, dentry->d_name.name);
192
193 ret = service_operation(new_op, "orangefs_unlink",
194 get_interruptible_flag(inode));
195
196 gossip_debug(GOSSIP_NAME_DEBUG,
197 "%s: service_operation returned:%d:\n",
198 __func__,
199 ret);
200
201 op_release(new_op);
202
203 if (!ret) {
204 drop_nlink(inode);
205
206 memset(&iattr, 0, sizeof iattr);
207 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
208 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
209 __orangefs_setattr(dir, &iattr);
210 }
211 return ret;
212 }
213
orangefs_symlink(const struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)214 static int orangefs_symlink(const struct mnt_idmap *idmap,
215 struct inode *dir,
216 struct dentry *dentry,
217 const char *symname)
218 {
219 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
220 struct orangefs_kernel_op_s *new_op;
221 struct orangefs_object_kref ref;
222 struct inode *inode;
223 struct iattr iattr;
224 int mode = 0755;
225 int ret;
226
227 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
228
229 if (!symname)
230 return -EINVAL;
231
232 if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
233 return -ENAMETOOLONG;
234
235 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
236 if (!new_op)
237 return -ENOMEM;
238
239 new_op->upcall.req.sym.parent_refn = parent->refn;
240
241 fill_default_sys_attrs(new_op->upcall.req.sym.attributes, mode);
242
243 strscpy(new_op->upcall.req.sym.entry_name, dentry->d_name.name);
244 strscpy(new_op->upcall.req.sym.target, symname);
245
246 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
247
248 gossip_debug(GOSSIP_NAME_DEBUG,
249 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
250 &new_op->downcall.resp.sym.refn.khandle,
251 new_op->downcall.resp.sym.refn.fs_id, ret);
252
253 if (ret < 0) {
254 gossip_debug(GOSSIP_NAME_DEBUG,
255 "%s: failed with error code %d\n",
256 __func__, ret);
257 goto out;
258 }
259
260 ref = new_op->downcall.resp.sym.refn;
261
262 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
263 if (IS_ERR(inode)) {
264 gossip_err
265 ("*** Failed to allocate orangefs symlink inode\n");
266 ret = PTR_ERR(inode);
267 goto out;
268 }
269 /*
270 * This is necessary because orangefs_inode_getattr will not
271 * re-read symlink size as it is impossible for it to change.
272 * Invalidating the cache does not help. orangefs_new_inode
273 * does not set the correct size (it does not know symname).
274 */
275 inode->i_size = strlen(symname);
276
277 gossip_debug(GOSSIP_NAME_DEBUG,
278 "Assigned symlink inode new number of %pU\n",
279 get_khandle_from_ino(inode));
280
281 d_instantiate_new(dentry, inode);
282 orangefs_set_timeout(dentry);
283
284 gossip_debug(GOSSIP_NAME_DEBUG,
285 "Inode (Symlink) %pU -> %pd\n",
286 get_khandle_from_ino(inode),
287 dentry);
288
289 memset(&iattr, 0, sizeof iattr);
290 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
291 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
292 __orangefs_setattr(dir, &iattr);
293 ret = 0;
294 out:
295 op_release(new_op);
296 return ret;
297 }
298
orangefs_mkdir(const struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)299 static struct dentry *orangefs_mkdir(const struct mnt_idmap *idmap, struct inode *dir,
300 struct dentry *dentry, umode_t mode)
301 {
302 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
303 struct orangefs_kernel_op_s *new_op;
304 struct orangefs_object_kref ref;
305 struct inode *inode;
306 struct iattr iattr;
307 int ret;
308
309 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
310 if (!new_op)
311 return ERR_PTR(-ENOMEM);
312
313 new_op->upcall.req.mkdir.parent_refn = parent->refn;
314
315 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, mode);
316
317 strscpy(new_op->upcall.req.mkdir.d_name, dentry->d_name.name);
318
319 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
320
321 gossip_debug(GOSSIP_NAME_DEBUG,
322 "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
323 &new_op->downcall.resp.mkdir.refn.khandle,
324 new_op->downcall.resp.mkdir.refn.fs_id);
325
326 if (ret < 0) {
327 gossip_debug(GOSSIP_NAME_DEBUG,
328 "%s: failed with error code %d\n",
329 __func__, ret);
330 goto out;
331 }
332
333 ref = new_op->downcall.resp.mkdir.refn;
334
335 inode = orangefs_new_inode(dir->i_sb, dir, mode, 0, &ref);
336 if (IS_ERR(inode)) {
337 gossip_err("*** Failed to allocate orangefs dir inode\n");
338 ret = PTR_ERR(inode);
339 goto out;
340 }
341
342 gossip_debug(GOSSIP_NAME_DEBUG,
343 "Assigned dir inode new number of %pU\n",
344 get_khandle_from_ino(inode));
345
346 d_instantiate_new(dentry, inode);
347 orangefs_set_timeout(dentry);
348
349 gossip_debug(GOSSIP_NAME_DEBUG,
350 "Inode (Directory) %pU -> %pd\n",
351 get_khandle_from_ino(inode),
352 dentry);
353
354 /*
355 * NOTE: we have no good way to keep nlink consistent for directories
356 * across clients; keep constant at 1.
357 */
358 memset(&iattr, 0, sizeof iattr);
359 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
360 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
361 __orangefs_setattr(dir, &iattr);
362 out:
363 op_release(new_op);
364 return ret ? ERR_PTR(ret) : NULL;
365 }
366
orangefs_rename(const struct mnt_idmap * idmap,struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)367 static int orangefs_rename(const struct mnt_idmap *idmap,
368 struct inode *old_dir,
369 struct dentry *old_dentry,
370 struct inode *new_dir,
371 struct dentry *new_dentry,
372 unsigned int flags)
373 {
374 struct orangefs_kernel_op_s *new_op;
375 struct iattr iattr;
376 int ret;
377
378 if (flags)
379 return -EINVAL;
380
381 gossip_debug(GOSSIP_NAME_DEBUG,
382 "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
383 old_dentry, new_dentry, d_count(new_dentry));
384
385 memset(&iattr, 0, sizeof iattr);
386 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
387 iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
388 __orangefs_setattr(new_dir, &iattr);
389
390 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
391 if (!new_op)
392 return -EINVAL;
393
394 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
395 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
396
397 strscpy(new_op->upcall.req.rename.d_old_name, old_dentry->d_name.name);
398 strscpy(new_op->upcall.req.rename.d_new_name, new_dentry->d_name.name);
399
400 ret = service_operation(new_op,
401 "orangefs_rename",
402 get_interruptible_flag(old_dentry->d_inode));
403
404 gossip_debug(GOSSIP_NAME_DEBUG,
405 "orangefs_rename: got downcall status %d\n",
406 ret);
407
408 if (new_dentry->d_inode)
409 inode_set_ctime_current(d_inode(new_dentry));
410
411 op_release(new_op);
412 return ret;
413 }
414
415 /* ORANGEFS implementation of VFS inode operations for directories */
416 const struct inode_operations orangefs_dir_inode_operations = {
417 .lookup = orangefs_lookup,
418 .get_inode_acl = orangefs_get_acl,
419 .set_acl = orangefs_set_acl,
420 .create = orangefs_create,
421 .unlink = orangefs_unlink,
422 .symlink = orangefs_symlink,
423 .mkdir = orangefs_mkdir,
424 .rmdir = orangefs_unlink,
425 .rename = orangefs_rename,
426 .setattr = orangefs_setattr,
427 .getattr = orangefs_getattr,
428 .listxattr = orangefs_listxattr,
429 .permission = orangefs_permission,
430 .update_time = orangefs_update_time,
431 };
432