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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 mnt_idmap *idmap,
19 struct inode *dir,
20 struct dentry *dentry,
21 umode_t mode,
22 bool exclusive)
23{
24 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
25 struct orangefs_kernel_op_s *new_op;
26 struct orangefs_object_kref ref;
27 struct inode *inode;
28 struct iattr iattr;
29 int ret;
30
31 gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
32 __func__,
33 dentry);
34
35 new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
36 if (!new_op)
37 return -ENOMEM;
38
39 new_op->upcall.req.create.parent_refn = parent->refn;
40
41 fill_default_sys_attrs(new_op->upcall.req.create.attributes,
42 ORANGEFS_TYPE_METAFILE, mode);
43
44 strscpy(new_op->upcall.req.create.d_name, dentry->d_name.name);
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 strscpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name);
140
141 gossip_debug(GOSSIP_NAME_DEBUG,
142 "%s: doing lookup on %s under %pU,%d\n",
143 __func__,
144 new_op->upcall.req.lookup.d_name,
145 &new_op->upcall.req.lookup.parent_refn.khandle,
146 new_op->upcall.req.lookup.parent_refn.fs_id);
147
148 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
149
150 gossip_debug(GOSSIP_NAME_DEBUG,
151 "Lookup Got %pU, fsid %d (ret=%d)\n",
152 &new_op->downcall.resp.lookup.refn.khandle,
153 new_op->downcall.resp.lookup.refn.fs_id,
154 ret);
155
156 if (ret == 0) {
157 orangefs_set_timeout(dentry);
158 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
159 } else if (ret == -ENOENT) {
160 inode = NULL;
161 } else {
162 /* must be a non-recoverable error */
163 inode = ERR_PTR(ret);
164 }
165
166 op_release(new_op);
167 return d_splice_alias(inode, dentry);
168}
169
170/* return 0 on success; non-zero otherwise */
171static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
172{
173 struct inode *inode = dentry->d_inode;
174 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
175 struct orangefs_kernel_op_s *new_op;
176 struct iattr iattr;
177 int ret;
178
179 gossip_debug(GOSSIP_NAME_DEBUG,
180 "%s: called on %pd\n"
181 " (inode %pU): Parent is %pU | fs_id %d\n",
182 __func__,
183 dentry,
184 get_khandle_from_ino(inode),
185 &parent->refn.khandle,
186 parent->refn.fs_id);
187
188 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
189 if (!new_op)
190 return -ENOMEM;
191
192 new_op->upcall.req.remove.parent_refn = parent->refn;
193 strscpy(new_op->upcall.req.remove.d_name, dentry->d_name.name);
194
195 ret = service_operation(new_op, "orangefs_unlink",
196 get_interruptible_flag(inode));
197
198 gossip_debug(GOSSIP_NAME_DEBUG,
199 "%s: service_operation returned:%d:\n",
200 __func__,
201 ret);
202
203 op_release(new_op);
204
205 if (!ret) {
206 drop_nlink(inode);
207
208 memset(&iattr, 0, sizeof iattr);
209 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
210 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
211 __orangefs_setattr(dir, &iattr);
212 }
213 return ret;
214}
215
216static int orangefs_symlink(struct mnt_idmap *idmap,
217 struct inode *dir,
218 struct dentry *dentry,
219 const char *symname)
220{
221 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
222 struct orangefs_kernel_op_s *new_op;
223 struct orangefs_object_kref ref;
224 struct inode *inode;
225 struct iattr iattr;
226 int mode = 0755;
227 int ret;
228
229 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
230
231 if (!symname)
232 return -EINVAL;
233
234 if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
235 return -ENAMETOOLONG;
236
237 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
238 if (!new_op)
239 return -ENOMEM;
240
241 new_op->upcall.req.sym.parent_refn = parent->refn;
242
243 fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
244 ORANGEFS_TYPE_SYMLINK,
245 mode);
246
247 strscpy(new_op->upcall.req.sym.entry_name, dentry->d_name.name);
248 strscpy(new_op->upcall.req.sym.target, symname);
249
250 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
251
252 gossip_debug(GOSSIP_NAME_DEBUG,
253 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
254 &new_op->downcall.resp.sym.refn.khandle,
255 new_op->downcall.resp.sym.refn.fs_id, ret);
256
257 if (ret < 0) {
258 gossip_debug(GOSSIP_NAME_DEBUG,
259 "%s: failed with error code %d\n",
260 __func__, ret);
261 goto out;
262 }
263
264 ref = new_op->downcall.resp.sym.refn;
265
266 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
267 if (IS_ERR(inode)) {
268 gossip_err
269 ("*** Failed to allocate orangefs symlink inode\n");
270 ret = PTR_ERR(inode);
271 goto out;
272 }
273 /*
274 * This is necessary because orangefs_inode_getattr will not
275 * re-read symlink size as it is impossible for it to change.
276 * Invalidating the cache does not help. orangefs_new_inode
277 * does not set the correct size (it does not know symname).
278 */
279 inode->i_size = strlen(symname);
280
281 gossip_debug(GOSSIP_NAME_DEBUG,
282 "Assigned symlink inode new number of %pU\n",
283 get_khandle_from_ino(inode));
284
285 d_instantiate_new(dentry, inode);
286 orangefs_set_timeout(dentry);
287
288 gossip_debug(GOSSIP_NAME_DEBUG,
289 "Inode (Symlink) %pU -> %pd\n",
290 get_khandle_from_ino(inode),
291 dentry);
292
293 memset(&iattr, 0, sizeof iattr);
294 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
295 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
296 __orangefs_setattr(dir, &iattr);
297 ret = 0;
298out:
299 op_release(new_op);
300 return ret;
301}
302
303static int orangefs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
304 struct dentry *dentry, umode_t mode)
305{
306 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
307 struct orangefs_kernel_op_s *new_op;
308 struct orangefs_object_kref ref;
309 struct inode *inode;
310 struct iattr iattr;
311 int ret;
312
313 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
314 if (!new_op)
315 return -ENOMEM;
316
317 new_op->upcall.req.mkdir.parent_refn = parent->refn;
318
319 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
320 ORANGEFS_TYPE_DIRECTORY, mode);
321
322 strscpy(new_op->upcall.req.mkdir.d_name, dentry->d_name.name);
323
324 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
325
326 gossip_debug(GOSSIP_NAME_DEBUG,
327 "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
328 &new_op->downcall.resp.mkdir.refn.khandle,
329 new_op->downcall.resp.mkdir.refn.fs_id);
330
331 if (ret < 0) {
332 gossip_debug(GOSSIP_NAME_DEBUG,
333 "%s: failed with error code %d\n",
334 __func__, ret);
335 goto out;
336 }
337
338 ref = new_op->downcall.resp.mkdir.refn;
339
340 inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref);
341 if (IS_ERR(inode)) {
342 gossip_err("*** Failed to allocate orangefs dir inode\n");
343 ret = PTR_ERR(inode);
344 goto out;
345 }
346
347 gossip_debug(GOSSIP_NAME_DEBUG,
348 "Assigned dir inode new number of %pU\n",
349 get_khandle_from_ino(inode));
350
351 d_instantiate_new(dentry, inode);
352 orangefs_set_timeout(dentry);
353
354 gossip_debug(GOSSIP_NAME_DEBUG,
355 "Inode (Directory) %pU -> %pd\n",
356 get_khandle_from_ino(inode),
357 dentry);
358
359 /*
360 * NOTE: we have no good way to keep nlink consistent for directories
361 * across clients; keep constant at 1.
362 */
363 memset(&iattr, 0, sizeof iattr);
364 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
365 iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
366 __orangefs_setattr(dir, &iattr);
367out:
368 op_release(new_op);
369 return ret;
370}
371
372static int orangefs_rename(struct mnt_idmap *idmap,
373 struct inode *old_dir,
374 struct dentry *old_dentry,
375 struct inode *new_dir,
376 struct dentry *new_dentry,
377 unsigned int flags)
378{
379 struct orangefs_kernel_op_s *new_op;
380 struct iattr iattr;
381 int ret;
382
383 if (flags)
384 return -EINVAL;
385
386 gossip_debug(GOSSIP_NAME_DEBUG,
387 "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
388 old_dentry, new_dentry, d_count(new_dentry));
389
390 memset(&iattr, 0, sizeof iattr);
391 iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
392 iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
393 __orangefs_setattr(new_dir, &iattr);
394
395 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
396 if (!new_op)
397 return -EINVAL;
398
399 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
400 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
401
402 strscpy(new_op->upcall.req.rename.d_old_name, old_dentry->d_name.name);
403 strscpy(new_op->upcall.req.rename.d_new_name, new_dentry->d_name.name);
404
405 ret = service_operation(new_op,
406 "orangefs_rename",
407 get_interruptible_flag(old_dentry->d_inode));
408
409 gossip_debug(GOSSIP_NAME_DEBUG,
410 "orangefs_rename: got downcall status %d\n",
411 ret);
412
413 if (new_dentry->d_inode)
414 inode_set_ctime_current(d_inode(new_dentry));
415
416 op_release(new_op);
417 return ret;
418}
419
420/* ORANGEFS implementation of VFS inode operations for directories */
421const struct inode_operations orangefs_dir_inode_operations = {
422 .lookup = orangefs_lookup,
423 .get_inode_acl = orangefs_get_acl,
424 .set_acl = orangefs_set_acl,
425 .create = orangefs_create,
426 .unlink = orangefs_unlink,
427 .symlink = orangefs_symlink,
428 .mkdir = orangefs_mkdir,
429 .rmdir = orangefs_unlink,
430 .rename = orangefs_rename,
431 .setattr = orangefs_setattr,
432 .getattr = orangefs_getattr,
433 .listxattr = orangefs_listxattr,
434 .permission = orangefs_permission,
435 .update_time = orangefs_update_time,
436};