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Commit | Line | Data |
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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 | }; |