Commit | Line | Data |
---|---|---|
274dcf55 MM |
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" | |
575e9461 | 12 | #include "orangefs-kernel.h" |
274dcf55 MM |
13 | |
14 | /* | |
15 | * Get a newly allocated inode to go with a negative dentry. | |
16 | */ | |
8bb8aefd | 17 | static int orangefs_create(struct inode *dir, |
274dcf55 MM |
18 | struct dentry *dentry, |
19 | umode_t mode, | |
20 | bool exclusive) | |
21 | { | |
8bb8aefd YL |
22 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
23 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
24 | struct inode *inode; |
25 | int ret; | |
26 | ||
5253487e MM |
27 | gossip_debug(GOSSIP_NAME_DEBUG, "%s: %s\n", |
28 | __func__, | |
29 | dentry->d_name.name); | |
274dcf55 | 30 | |
8bb8aefd | 31 | new_op = op_alloc(ORANGEFS_VFS_OP_CREATE); |
274dcf55 MM |
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, | |
8bb8aefd | 38 | ORANGEFS_TYPE_METAFILE, mode); |
274dcf55 MM |
39 | |
40 | strncpy(new_op->upcall.req.create.d_name, | |
8bb8aefd | 41 | dentry->d_name.name, ORANGEFS_NAME_LEN); |
274dcf55 MM |
42 | |
43 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
44 | ||
45 | gossip_debug(GOSSIP_NAME_DEBUG, | |
5253487e MM |
46 | "%s: %s: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n", |
47 | __func__, | |
48 | dentry->d_name.name, | |
274dcf55 | 49 | &new_op->downcall.resp.create.refn.khandle, |
5253487e MM |
50 | new_op->downcall.resp.create.refn.fs_id, |
51 | new_op, | |
52 | ret); | |
274dcf55 | 53 | |
5253487e | 54 | if (ret < 0) |
274dcf55 | 55 | goto out; |
274dcf55 | 56 | |
8bb8aefd | 57 | inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, |
274dcf55 MM |
58 | &new_op->downcall.resp.create.refn); |
59 | if (IS_ERR(inode)) { | |
5253487e MM |
60 | gossip_err("%s: Failed to allocate inode for file :%s:\n", |
61 | __func__, | |
62 | dentry->d_name.name); | |
274dcf55 MM |
63 | ret = PTR_ERR(inode); |
64 | goto out; | |
65 | } | |
66 | ||
67 | gossip_debug(GOSSIP_NAME_DEBUG, | |
5253487e MM |
68 | "%s: Assigned inode :%pU: for file :%s:\n", |
69 | __func__, | |
70 | get_khandle_from_ino(inode), | |
71 | dentry->d_name.name); | |
274dcf55 MM |
72 | |
73 | d_instantiate(dentry, inode); | |
74 | unlock_new_inode(inode); | |
75 | ||
76 | gossip_debug(GOSSIP_NAME_DEBUG, | |
5253487e MM |
77 | "%s: dentry instantiated for %s\n", |
78 | __func__, | |
274dcf55 MM |
79 | dentry->d_name.name); |
80 | ||
81 | SetMtimeFlag(parent); | |
82 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
83 | mark_inode_dirty_sync(dir); | |
84 | ret = 0; | |
85 | out: | |
86 | op_release(new_op); | |
5253487e MM |
87 | gossip_debug(GOSSIP_NAME_DEBUG, |
88 | "%s: %s: returning %d\n", | |
89 | __func__, | |
90 | dentry->d_name.name, | |
91 | ret); | |
274dcf55 MM |
92 | return ret; |
93 | } | |
94 | ||
95 | /* | |
96 | * Attempt to resolve an object name (dentry->d_name), parent handle, and | |
97 | * fsid into a handle for the object. | |
98 | */ | |
8bb8aefd | 99 | static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry, |
274dcf55 MM |
100 | unsigned int flags) |
101 | { | |
8bb8aefd YL |
102 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
103 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
104 | struct inode *inode; |
105 | struct dentry *res; | |
106 | int ret = -EINVAL; | |
107 | ||
108 | /* | |
109 | * in theory we could skip a lookup here (if the intent is to | |
110 | * create) in order to avoid a potentially failed lookup, but | |
111 | * leaving it in can skip a valid lookup and try to create a file | |
112 | * that already exists (e.g. the vfs already handles checking for | |
113 | * -EEXIST on O_EXCL opens, which is broken if we skip this lookup | |
114 | * in the create path) | |
115 | */ | |
116 | gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %s\n", | |
117 | __func__, dentry->d_name.name); | |
118 | ||
8bb8aefd | 119 | if (dentry->d_name.len > (ORANGEFS_NAME_LEN - 1)) |
274dcf55 MM |
120 | return ERR_PTR(-ENAMETOOLONG); |
121 | ||
8bb8aefd | 122 | new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP); |
274dcf55 MM |
123 | if (!new_op) |
124 | return ERR_PTR(-ENOMEM); | |
125 | ||
7cec28e9 | 126 | new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW; |
274dcf55 MM |
127 | |
128 | gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n", | |
129 | __FILE__, | |
130 | __func__, | |
131 | __LINE__, | |
132 | &parent->refn.khandle); | |
133 | new_op->upcall.req.lookup.parent_refn = parent->refn; | |
134 | ||
135 | strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name, | |
8bb8aefd | 136 | ORANGEFS_NAME_LEN); |
274dcf55 MM |
137 | |
138 | gossip_debug(GOSSIP_NAME_DEBUG, | |
139 | "%s: doing lookup on %s under %pU,%d (follow=%s)\n", | |
140 | __func__, | |
141 | new_op->upcall.req.lookup.d_name, | |
142 | &new_op->upcall.req.lookup.parent_refn.khandle, | |
143 | new_op->upcall.req.lookup.parent_refn.fs_id, | |
144 | ((new_op->upcall.req.lookup.sym_follow == | |
8bb8aefd | 145 | ORANGEFS_LOOKUP_LINK_FOLLOW) ? "yes" : "no")); |
274dcf55 MM |
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, | |
8bb8aefd | 171 | "orangefs_lookup: Adding *negative* dentry " |
274dcf55 MM |
172 | "%p for %s\n", |
173 | dentry, | |
174 | dentry->d_name.name); | |
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 | ||
8bb8aefd | 186 | inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn); |
274dcf55 MM |
187 | if (IS_ERR(inode)) { |
188 | gossip_debug(GOSSIP_NAME_DEBUG, | |
189 | "error %ld from iget\n", PTR_ERR(inode)); | |
190 | res = ERR_CAST(inode); | |
191 | goto out; | |
192 | } | |
193 | ||
194 | gossip_debug(GOSSIP_NAME_DEBUG, | |
195 | "%s:%s:%d " | |
196 | "Found good inode [%lu] with count [%d]\n", | |
197 | __FILE__, | |
198 | __func__, | |
199 | __LINE__, | |
200 | inode->i_ino, | |
201 | (int)atomic_read(&inode->i_count)); | |
202 | ||
203 | /* update dentry/inode pair into dcache */ | |
204 | res = d_splice_alias(inode, dentry); | |
205 | ||
206 | gossip_debug(GOSSIP_NAME_DEBUG, | |
207 | "Lookup success (inode ct = %d)\n", | |
208 | (int)atomic_read(&inode->i_count)); | |
209 | out: | |
210 | op_release(new_op); | |
211 | return res; | |
212 | } | |
213 | ||
214 | /* return 0 on success; non-zero otherwise */ | |
8bb8aefd | 215 | static int orangefs_unlink(struct inode *dir, struct dentry *dentry) |
274dcf55 MM |
216 | { |
217 | struct inode *inode = dentry->d_inode; | |
8bb8aefd YL |
218 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
219 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
220 | int ret; |
221 | ||
222 | gossip_debug(GOSSIP_NAME_DEBUG, | |
223 | "%s: called on %s\n" | |
224 | " (inode %pU): Parent is %pU | fs_id %d\n", | |
225 | __func__, | |
226 | dentry->d_name.name, | |
227 | get_khandle_from_ino(inode), | |
228 | &parent->refn.khandle, | |
229 | parent->refn.fs_id); | |
230 | ||
8bb8aefd | 231 | new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE); |
274dcf55 MM |
232 | if (!new_op) |
233 | return -ENOMEM; | |
234 | ||
235 | new_op->upcall.req.remove.parent_refn = parent->refn; | |
236 | strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name, | |
8bb8aefd | 237 | ORANGEFS_NAME_LEN); |
274dcf55 | 238 | |
8bb8aefd | 239 | ret = service_operation(new_op, "orangefs_unlink", |
274dcf55 MM |
240 | get_interruptible_flag(inode)); |
241 | ||
5253487e MM |
242 | gossip_debug(GOSSIP_NAME_DEBUG, |
243 | "%s: service_operation returned:%d:\n", | |
244 | __func__, | |
245 | ret); | |
246 | ||
274dcf55 MM |
247 | op_release(new_op); |
248 | ||
249 | if (!ret) { | |
250 | drop_nlink(inode); | |
251 | ||
252 | SetMtimeFlag(parent); | |
253 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
254 | mark_inode_dirty_sync(dir); | |
255 | } | |
256 | return ret; | |
257 | } | |
258 | ||
8bb8aefd | 259 | static int orangefs_symlink(struct inode *dir, |
274dcf55 MM |
260 | struct dentry *dentry, |
261 | const char *symname) | |
262 | { | |
8bb8aefd YL |
263 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
264 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
265 | struct inode *inode; |
266 | int mode = 755; | |
267 | int ret; | |
268 | ||
269 | gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__); | |
270 | ||
271 | if (!symname) | |
272 | return -EINVAL; | |
273 | ||
8bb8aefd | 274 | new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK); |
274dcf55 MM |
275 | if (!new_op) |
276 | return -ENOMEM; | |
277 | ||
278 | new_op->upcall.req.sym.parent_refn = parent->refn; | |
279 | ||
280 | fill_default_sys_attrs(new_op->upcall.req.sym.attributes, | |
8bb8aefd | 281 | ORANGEFS_TYPE_SYMLINK, |
274dcf55 MM |
282 | mode); |
283 | ||
284 | strncpy(new_op->upcall.req.sym.entry_name, | |
285 | dentry->d_name.name, | |
8bb8aefd YL |
286 | ORANGEFS_NAME_LEN); |
287 | strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_LEN); | |
274dcf55 MM |
288 | |
289 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
290 | ||
291 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 292 | "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n", |
274dcf55 MM |
293 | &new_op->downcall.resp.sym.refn.khandle, |
294 | new_op->downcall.resp.sym.refn.fs_id, ret); | |
295 | ||
296 | if (ret < 0) { | |
297 | gossip_debug(GOSSIP_NAME_DEBUG, | |
298 | "%s: failed with error code %d\n", | |
299 | __func__, ret); | |
300 | goto out; | |
301 | } | |
302 | ||
8bb8aefd | 303 | inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, |
274dcf55 MM |
304 | &new_op->downcall.resp.sym.refn); |
305 | if (IS_ERR(inode)) { | |
306 | gossip_err | |
8bb8aefd | 307 | ("*** Failed to allocate orangefs symlink inode\n"); |
274dcf55 MM |
308 | ret = PTR_ERR(inode); |
309 | goto out; | |
310 | } | |
311 | ||
312 | gossip_debug(GOSSIP_NAME_DEBUG, | |
313 | "Assigned symlink inode new number of %pU\n", | |
314 | get_khandle_from_ino(inode)); | |
315 | ||
316 | d_instantiate(dentry, inode); | |
317 | unlock_new_inode(inode); | |
318 | ||
319 | gossip_debug(GOSSIP_NAME_DEBUG, | |
320 | "Inode (Symlink) %pU -> %s\n", | |
321 | get_khandle_from_ino(inode), | |
322 | dentry->d_name.name); | |
323 | ||
324 | SetMtimeFlag(parent); | |
325 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
326 | mark_inode_dirty_sync(dir); | |
327 | ret = 0; | |
328 | out: | |
329 | op_release(new_op); | |
330 | return ret; | |
331 | } | |
332 | ||
8bb8aefd | 333 | static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
274dcf55 | 334 | { |
8bb8aefd YL |
335 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
336 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
337 | struct inode *inode; |
338 | int ret; | |
339 | ||
8bb8aefd | 340 | new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR); |
274dcf55 MM |
341 | if (!new_op) |
342 | return -ENOMEM; | |
343 | ||
344 | new_op->upcall.req.mkdir.parent_refn = parent->refn; | |
345 | ||
346 | fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, | |
8bb8aefd | 347 | ORANGEFS_TYPE_DIRECTORY, mode); |
274dcf55 MM |
348 | |
349 | strncpy(new_op->upcall.req.mkdir.d_name, | |
8bb8aefd | 350 | dentry->d_name.name, ORANGEFS_NAME_LEN); |
274dcf55 MM |
351 | |
352 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
353 | ||
354 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 355 | "Mkdir Got ORANGEFS handle %pU on fsid %d\n", |
274dcf55 MM |
356 | &new_op->downcall.resp.mkdir.refn.khandle, |
357 | new_op->downcall.resp.mkdir.refn.fs_id); | |
358 | ||
359 | if (ret < 0) { | |
360 | gossip_debug(GOSSIP_NAME_DEBUG, | |
361 | "%s: failed with error code %d\n", | |
362 | __func__, ret); | |
363 | goto out; | |
364 | } | |
365 | ||
8bb8aefd | 366 | inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, |
274dcf55 MM |
367 | &new_op->downcall.resp.mkdir.refn); |
368 | if (IS_ERR(inode)) { | |
8bb8aefd | 369 | gossip_err("*** Failed to allocate orangefs dir inode\n"); |
274dcf55 MM |
370 | ret = PTR_ERR(inode); |
371 | goto out; | |
372 | } | |
373 | ||
374 | gossip_debug(GOSSIP_NAME_DEBUG, | |
375 | "Assigned dir inode new number of %pU\n", | |
376 | get_khandle_from_ino(inode)); | |
377 | ||
378 | d_instantiate(dentry, inode); | |
379 | unlock_new_inode(inode); | |
380 | ||
381 | gossip_debug(GOSSIP_NAME_DEBUG, | |
382 | "Inode (Directory) %pU -> %s\n", | |
383 | get_khandle_from_ino(inode), | |
384 | dentry->d_name.name); | |
385 | ||
386 | /* | |
387 | * NOTE: we have no good way to keep nlink consistent for directories | |
388 | * across clients; keep constant at 1. | |
389 | */ | |
390 | SetMtimeFlag(parent); | |
391 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
392 | mark_inode_dirty_sync(dir); | |
393 | out: | |
394 | op_release(new_op); | |
395 | return ret; | |
396 | } | |
397 | ||
8bb8aefd | 398 | static int orangefs_rename(struct inode *old_dir, |
274dcf55 MM |
399 | struct dentry *old_dentry, |
400 | struct inode *new_dir, | |
401 | struct dentry *new_dentry) | |
402 | { | |
8bb8aefd | 403 | struct orangefs_kernel_op_s *new_op; |
274dcf55 MM |
404 | int ret; |
405 | ||
406 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 407 | "orangefs_rename: called (%s/%s => %s/%s) ct=%d\n", |
274dcf55 MM |
408 | old_dentry->d_parent->d_name.name, |
409 | old_dentry->d_name.name, | |
410 | new_dentry->d_parent->d_name.name, | |
411 | new_dentry->d_name.name, | |
412 | d_count(new_dentry)); | |
413 | ||
8bb8aefd | 414 | new_op = op_alloc(ORANGEFS_VFS_OP_RENAME); |
274dcf55 MM |
415 | if (!new_op) |
416 | return -EINVAL; | |
417 | ||
8bb8aefd YL |
418 | new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn; |
419 | new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn; | |
274dcf55 MM |
420 | |
421 | strncpy(new_op->upcall.req.rename.d_old_name, | |
422 | old_dentry->d_name.name, | |
8bb8aefd | 423 | ORANGEFS_NAME_LEN); |
274dcf55 MM |
424 | strncpy(new_op->upcall.req.rename.d_new_name, |
425 | new_dentry->d_name.name, | |
8bb8aefd | 426 | ORANGEFS_NAME_LEN); |
274dcf55 MM |
427 | |
428 | ret = service_operation(new_op, | |
8bb8aefd | 429 | "orangefs_rename", |
274dcf55 MM |
430 | get_interruptible_flag(old_dentry->d_inode)); |
431 | ||
432 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 433 | "orangefs_rename: got downcall status %d\n", |
274dcf55 MM |
434 | ret); |
435 | ||
436 | if (new_dentry->d_inode) | |
437 | new_dentry->d_inode->i_ctime = CURRENT_TIME; | |
438 | ||
439 | op_release(new_op); | |
440 | return ret; | |
441 | } | |
442 | ||
8bb8aefd YL |
443 | /* ORANGEFS implementation of VFS inode operations for directories */ |
444 | struct inode_operations orangefs_dir_inode_operations = { | |
445 | .lookup = orangefs_lookup, | |
446 | .get_acl = orangefs_get_acl, | |
447 | .set_acl = orangefs_set_acl, | |
448 | .create = orangefs_create, | |
449 | .unlink = orangefs_unlink, | |
450 | .symlink = orangefs_symlink, | |
451 | .mkdir = orangefs_mkdir, | |
452 | .rmdir = orangefs_unlink, | |
453 | .rename = orangefs_rename, | |
454 | .setattr = orangefs_setattr, | |
455 | .getattr = orangefs_getattr, | |
274dcf55 MM |
456 | .setxattr = generic_setxattr, |
457 | .getxattr = generic_getxattr, | |
458 | .removexattr = generic_removexattr, | |
8bb8aefd | 459 | .listxattr = orangefs_listxattr, |
933287da | 460 | .permission = orangefs_permission, |
274dcf55 | 461 | }; |