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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 */
18static int orangefs_create(struct inode *dir,
19 struct dentry *dentry,
20 umode_t mode,
21 bool exclusive)
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,
41 ORANGEFS_TYPE_METAFILE, mode);
42
43 strncpy(new_op->upcall.req.create.d_name,
44 dentry->d_name.name, ORANGEFS_NAME_MAX - 1);
45
46 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
47
48 gossip_debug(GOSSIP_NAME_DEBUG,
49 "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
50 __func__,
51 dentry,
52 &new_op->downcall.resp.create.refn.khandle,
53 new_op->downcall.resp.create.refn.fs_id,
54 new_op,
55 ret);
56
57 if (ret < 0)
58 goto out;
59
60 ref = new_op->downcall.resp.create.refn;
61
62 inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref);
63 if (IS_ERR(inode)) {
64 gossip_err("%s: Failed to allocate inode for file :%pd:\n",
65 __func__,
66 dentry);
67 ret = PTR_ERR(inode);
68 goto out;
69 }
70
71 gossip_debug(GOSSIP_NAME_DEBUG,
72 "%s: Assigned inode :%pU: for file :%pd:\n",
73 __func__,
74 get_khandle_from_ino(inode),
75 dentry);
76
77 d_instantiate_new(dentry, inode);
78 orangefs_set_timeout(dentry);
79
80 gossip_debug(GOSSIP_NAME_DEBUG,
81 "%s: dentry instantiated for %pd\n",
82 __func__,
83 dentry);
84
85 memset(&iattr, 0, sizeof iattr);
86 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
87 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
88 __orangefs_setattr(dir, &iattr);
89 ret = 0;
90out:
91 op_release(new_op);
92 gossip_debug(GOSSIP_NAME_DEBUG,
93 "%s: %pd: returning %d\n",
94 __func__,
95 dentry,
96 ret);
97 return ret;
98}
99
100/*
101 * Attempt to resolve an object name (dentry->d_name), parent handle, and
102 * fsid into a handle for the object.
103 */
104static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
105 unsigned int flags)
106{
107 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
108 struct orangefs_kernel_op_s *new_op;
109 struct inode *inode;
110 int ret = -EINVAL;
111
112 /*
113 * in theory we could skip a lookup here (if the intent is to
114 * create) in order to avoid a potentially failed lookup, but
115 * leaving it in can skip a valid lookup and try to create a file
116 * that already exists (e.g. the vfs already handles checking for
117 * -EEXIST on O_EXCL opens, which is broken if we skip this lookup
118 * in the create path)
119 */
120 gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
121 __func__, dentry);
122
123 if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
124 return ERR_PTR(-ENAMETOOLONG);
125
126 new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
127 if (!new_op)
128 return ERR_PTR(-ENOMEM);
129
130 new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
131
132 gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
133 __FILE__,
134 __func__,
135 __LINE__,
136 &parent->refn.khandle);
137 new_op->upcall.req.lookup.parent_refn = parent->refn;
138
139 strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
140 ORANGEFS_NAME_MAX - 1);
141
142 gossip_debug(GOSSIP_NAME_DEBUG,
143 "%s: doing lookup on %s under %pU,%d\n",
144 __func__,
145 new_op->upcall.req.lookup.d_name,
146 &new_op->upcall.req.lookup.parent_refn.khandle,
147 new_op->upcall.req.lookup.parent_refn.fs_id);
148
149 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
150
151 gossip_debug(GOSSIP_NAME_DEBUG,
152 "Lookup Got %pU, fsid %d (ret=%d)\n",
153 &new_op->downcall.resp.lookup.refn.khandle,
154 new_op->downcall.resp.lookup.refn.fs_id,
155 ret);
156
157 if (ret == 0) {
158 orangefs_set_timeout(dentry);
159 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
160 } else if (ret == -ENOENT) {
161 inode = NULL;
162 } else {
163 /* must be a non-recoverable error */
164 inode = ERR_PTR(ret);
165 }
166
167 op_release(new_op);
168 return d_splice_alias(inode, dentry);
169}
170
171/* return 0 on success; non-zero otherwise */
172static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
173{
174 struct inode *inode = dentry->d_inode;
175 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
176 struct orangefs_kernel_op_s *new_op;
177 struct iattr iattr;
178 int ret;
179
180 gossip_debug(GOSSIP_NAME_DEBUG,
181 "%s: called on %pd\n"
182 " (inode %pU): Parent is %pU | fs_id %d\n",
183 __func__,
184 dentry,
185 get_khandle_from_ino(inode),
186 &parent->refn.khandle,
187 parent->refn.fs_id);
188
189 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
190 if (!new_op)
191 return -ENOMEM;
192
193 new_op->upcall.req.remove.parent_refn = parent->refn;
194 strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
195 ORANGEFS_NAME_MAX - 1);
196
197 ret = service_operation(new_op, "orangefs_unlink",
198 get_interruptible_flag(inode));
199
200 gossip_debug(GOSSIP_NAME_DEBUG,
201 "%s: service_operation returned:%d:\n",
202 __func__,
203 ret);
204
205 op_release(new_op);
206
207 if (!ret) {
208 drop_nlink(inode);
209
210 memset(&iattr, 0, sizeof iattr);
211 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
212 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
213 __orangefs_setattr(dir, &iattr);
214 }
215 return ret;
216}
217
218static int orangefs_symlink(struct inode *dir,
219 struct dentry *dentry,
220 const char *symname)
221{
222 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
223 struct orangefs_kernel_op_s *new_op;
224 struct orangefs_object_kref ref;
225 struct inode *inode;
226 struct iattr iattr;
227 int mode = 0755;
228 int ret;
229
230 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
231
232 if (!symname)
233 return -EINVAL;
234
235 if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
236 return -ENAMETOOLONG;
237
238 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
239 if (!new_op)
240 return -ENOMEM;
241
242 new_op->upcall.req.sym.parent_refn = parent->refn;
243
244 fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
245 ORANGEFS_TYPE_SYMLINK,
246 mode);
247
248 strncpy(new_op->upcall.req.sym.entry_name,
249 dentry->d_name.name,
250 ORANGEFS_NAME_MAX - 1);
251 strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX - 1);
252
253 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
254
255 gossip_debug(GOSSIP_NAME_DEBUG,
256 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
257 &new_op->downcall.resp.sym.refn.khandle,
258 new_op->downcall.resp.sym.refn.fs_id, ret);
259
260 if (ret < 0) {
261 gossip_debug(GOSSIP_NAME_DEBUG,
262 "%s: failed with error code %d\n",
263 __func__, ret);
264 goto out;
265 }
266
267 ref = new_op->downcall.resp.sym.refn;
268
269 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
270 if (IS_ERR(inode)) {
271 gossip_err
272 ("*** Failed to allocate orangefs symlink inode\n");
273 ret = PTR_ERR(inode);
274 goto out;
275 }
276 /*
277 * This is necessary because orangefs_inode_getattr will not
278 * re-read symlink size as it is impossible for it to change.
279 * Invalidating the cache does not help. orangefs_new_inode
280 * does not set the correct size (it does not know symname).
281 */
282 inode->i_size = strlen(symname);
283
284 gossip_debug(GOSSIP_NAME_DEBUG,
285 "Assigned symlink inode new number of %pU\n",
286 get_khandle_from_ino(inode));
287
288 d_instantiate_new(dentry, inode);
289 orangefs_set_timeout(dentry);
290
291 gossip_debug(GOSSIP_NAME_DEBUG,
292 "Inode (Symlink) %pU -> %pd\n",
293 get_khandle_from_ino(inode),
294 dentry);
295
296 memset(&iattr, 0, sizeof iattr);
297 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
298 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
299 __orangefs_setattr(dir, &iattr);
300 ret = 0;
301out:
302 op_release(new_op);
303 return ret;
304}
305
306static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
307{
308 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
309 struct orangefs_kernel_op_s *new_op;
310 struct orangefs_object_kref ref;
311 struct inode *inode;
312 struct iattr iattr;
313 int ret;
314
315 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
316 if (!new_op)
317 return -ENOMEM;
318
319 new_op->upcall.req.mkdir.parent_refn = parent->refn;
320
321 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
322 ORANGEFS_TYPE_DIRECTORY, mode);
323
324 strncpy(new_op->upcall.req.mkdir.d_name,
325 dentry->d_name.name, ORANGEFS_NAME_MAX - 1);
326
327 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
328
329 gossip_debug(GOSSIP_NAME_DEBUG,
330 "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
331 &new_op->downcall.resp.mkdir.refn.khandle,
332 new_op->downcall.resp.mkdir.refn.fs_id);
333
334 if (ret < 0) {
335 gossip_debug(GOSSIP_NAME_DEBUG,
336 "%s: failed with error code %d\n",
337 __func__, ret);
338 goto out;
339 }
340
341 ref = new_op->downcall.resp.mkdir.refn;
342
343 inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref);
344 if (IS_ERR(inode)) {
345 gossip_err("*** Failed to allocate orangefs dir inode\n");
346 ret = PTR_ERR(inode);
347 goto out;
348 }
349
350 gossip_debug(GOSSIP_NAME_DEBUG,
351 "Assigned dir inode new number of %pU\n",
352 get_khandle_from_ino(inode));
353
354 d_instantiate_new(dentry, inode);
355 orangefs_set_timeout(dentry);
356
357 gossip_debug(GOSSIP_NAME_DEBUG,
358 "Inode (Directory) %pU -> %pd\n",
359 get_khandle_from_ino(inode),
360 dentry);
361
362 /*
363 * NOTE: we have no good way to keep nlink consistent for directories
364 * across clients; keep constant at 1.
365 */
366 memset(&iattr, 0, sizeof iattr);
367 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
368 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
369 __orangefs_setattr(dir, &iattr);
370out:
371 op_release(new_op);
372 return ret;
373}
374
375static int orangefs_rename(struct inode *old_dir,
376 struct dentry *old_dentry,
377 struct inode *new_dir,
378 struct dentry *new_dentry,
379 unsigned int flags)
380{
381 struct orangefs_kernel_op_s *new_op;
382 struct iattr iattr;
383 int ret;
384
385 if (flags)
386 return -EINVAL;
387
388 gossip_debug(GOSSIP_NAME_DEBUG,
389 "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
390 old_dentry, new_dentry, d_count(new_dentry));
391
392 memset(&iattr, 0, sizeof iattr);
393 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
394 iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
395 __orangefs_setattr(new_dir, &iattr);
396
397 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
398 if (!new_op)
399 return -EINVAL;
400
401 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
402 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
403
404 strncpy(new_op->upcall.req.rename.d_old_name,
405 old_dentry->d_name.name,
406 ORANGEFS_NAME_MAX - 1);
407 strncpy(new_op->upcall.req.rename.d_new_name,
408 new_dentry->d_name.name,
409 ORANGEFS_NAME_MAX - 1);
410
411 ret = service_operation(new_op,
412 "orangefs_rename",
413 get_interruptible_flag(old_dentry->d_inode));
414
415 gossip_debug(GOSSIP_NAME_DEBUG,
416 "orangefs_rename: got downcall status %d\n",
417 ret);
418
419 if (new_dentry->d_inode)
420 new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);
421
422 op_release(new_op);
423 return ret;
424}
425
426/* ORANGEFS implementation of VFS inode operations for directories */
427const struct inode_operations orangefs_dir_inode_operations = {
428 .lookup = orangefs_lookup,
429 .get_acl = orangefs_get_acl,
430 .set_acl = orangefs_set_acl,
431 .create = orangefs_create,
432 .unlink = orangefs_unlink,
433 .symlink = orangefs_symlink,
434 .mkdir = orangefs_mkdir,
435 .rmdir = orangefs_unlink,
436 .rename = orangefs_rename,
437 .setattr = orangefs_setattr,
438 .getattr = orangefs_getattr,
439 .listxattr = orangefs_listxattr,
440 .permission = orangefs_permission,
441 .update_time = orangefs_update_time,
442};